merge 8.7

160 files changed, 16746 insertions, 2987 deletions

diff --git a/.fossil-settings/crnl-glob b/.fossil-settings/crnl-glob
deleted file mode 100644
index 56f3a03..0000000
--- a/.fossil-settings/crnl-glob
+++ /dev/null
@@ -1,19 +0,0 @@
-compat/zlib/contrib/dotzlib/DotZLib/UnitTests.cs
-compat/zlib/contrib/vstudio/readme.txt
-compat/zlib/contrib/vstudio/*/zlib.rc
-compat/zlib/win32/*.txt
-compat/zlib/win64/*.txt
-libtommath/*.dsp
-libtommath/*.sln
-libtommath/*.vcproj
-tools/tcl.hpj.in
-tools/tcl.wse.in
-win/buildall.vc.bat
-win/coffbase.txt
-win/makefile.vc
-win/rules.vc
-win/rules-ext.vc
-win/targets.vc
-win/tcl.dsp
-win/tcl.dsw
-win/tcl.hpj.in
\ No newline at end of file
diff --git a/ChangeLog.2007 b/ChangeLog.2007
index 5995956..34725e3 100644
--- a/ChangeLog.2007
+++ b/ChangeLog.2007
@@ -1426,7 +1426,7 @@
 	initialization assumptions of the TIP 280 code in CompileWord().
 
 	* generic/tclCompExpr.c:	Suppress the attempt to convert to
-	numeric when pre-compiling a constant expresion indicates an error.
+	numeric when pre-compiling a constant expression indicates an error.
 
 2007-08-22  Miguel Sofer  <msofer@users.sf.net>
 
diff --git a/compat/zlib/contrib/minizip/minizip.c b/compat/zlib/contrib/minizip/minizip.c
index 4288962..17582d0 100644
--- a/compat/zlib/contrib/minizip/minizip.c
+++ b/compat/zlib/contrib/minizip/minizip.c
@@ -12,7 +12,6 @@
          Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
 */
 
-
 #if (!defined(_WIN32)) && (!defined(WIN32)) && (!defined(__APPLE__))
         #ifndef __USE_FILE_OFFSET64
                 #define __USE_FILE_OFFSET64
@@ -28,7 +27,7 @@
         #endif
 #endif
 
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(IOAPI_NO_64)
 // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
 #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
 #define FTELLO_FUNC(stream) ftello(stream)
@@ -39,8 +38,7 @@
 #define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
 #endif
 
-
-
+#include "tinydir.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -172,6 +170,7 @@ void do_banner()
 void do_help()
 {
     printf("Usage : minizip [-o] [-a] [-0 to -9] [-p password] [-j] file.zip [files_to_add]\n\n" \
+           "  -r  Scan directories recursively\n" \
            "  -o  Overwrite existing file.zip\n" \
            "  -a  Append to existing file.zip\n" \
            "  -0  Store only\n" \
@@ -243,12 +242,153 @@ int isLargeFile(const char* filename)
  return largeFile;
 }
 
+void addFileToZip(zipFile zf, const char *filenameinzip, const char *password, int opt_exclude_path,int opt_compress_level) {
+    FILE * fin;
+    int size_read;
+    const char *savefilenameinzip;
+    zip_fileinfo zi;
+    unsigned long crcFile=0;
+    int zip64 = 0;
+    int err=0;
+    int size_buf=WRITEBUFFERSIZE;
+    unsigned char buf[WRITEBUFFERSIZE];
+    zi.tmz_date.tm_sec = zi.tmz_date.tm_min = zi.tmz_date.tm_hour =
+    zi.tmz_date.tm_mday = zi.tmz_date.tm_mon = zi.tmz_date.tm_year = 0;
+    zi.dosDate = 0;
+    zi.internal_fa = 0;
+    zi.external_fa = 0;
+    filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);
+
+/*
+    err = zipOpenNewFileInZip(zf,filenameinzip,&zi,
+                     NULL,0,NULL,0,NULL / * comment * /,
+                     (opt_compress_level != 0) ? Z_DEFLATED : 0,
+                     opt_compress_level);
+*/
+    if ((password != NULL) && (err==ZIP_OK))
+        err = getFileCrc(filenameinzip,buf,size_buf,&crcFile);
+
+    zip64 = isLargeFile(filenameinzip);
+
+   /* The path name saved, should not include a leading slash. */
+   /*if it did, windows/xp and dynazip couldn't read the zip file. */
+     savefilenameinzip = filenameinzip;
+     while( savefilenameinzip[0] == '\\' || savefilenameinzip[0] == '/' )
+     {
+         savefilenameinzip++;
+     }
+
+     /*should the zip file contain any path at all?*/
+     if( opt_exclude_path )
+     {
+         const char *tmpptr;
+         const char *lastslash = 0;
+         for( tmpptr = savefilenameinzip; *tmpptr; tmpptr++)
+         {
+             if( *tmpptr == '\\' || *tmpptr == '/')
+             {
+                 lastslash = tmpptr;
+             }
+         }
+         if( lastslash != NULL )
+         {
+             savefilenameinzip = lastslash+1; // base filename follows last slash.
+         }
+     }
+
+     /**/
+    err = zipOpenNewFileInZip3_64(zf,savefilenameinzip,&zi,
+                     NULL,0,NULL,0,NULL /* comment*/,
+                     (opt_compress_level != 0) ? Z_DEFLATED : 0,
+                     opt_compress_level,0,
+                     /* -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, */
+                     -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
+                     password,crcFile, zip64);
+
+    if (err != ZIP_OK)
+        printf("error in opening %s in zipfile\n",filenameinzip);
+    else
+    {
+        fin = FOPEN_FUNC(filenameinzip,"rb");
+        if (fin==NULL)
+        {
+            err=ZIP_ERRNO;
+            printf("error in opening %s for reading\n",filenameinzip);
+        }
+    }
+
+    if (err == ZIP_OK)
+        do
+        {
+            err = ZIP_OK;
+            size_read = (int)fread(buf,1,size_buf,fin);
+            if (size_read < size_buf)
+                if (feof(fin)==0)
+            {
+                printf("error in reading %s\n",filenameinzip);
+                err = ZIP_ERRNO;
+            }
+
+            if (size_read>0)
+            {
+                err = zipWriteInFileInZip (zf,buf,size_read);
+                if (err<0)
+                {
+                    printf("error in writing %s in the zipfile\n",
+                                     filenameinzip);
+                }
+
+            }
+        } while ((err == ZIP_OK) && (size_read>0));
+
+    if (fin)
+        fclose(fin);
+
+    if (err<0)
+        err=ZIP_ERRNO;
+    else
+    {
+        err = zipCloseFileInZip(zf);
+        if (err!=ZIP_OK)
+            printf("error in closing %s in the zipfile\n",
+                        filenameinzip);
+    }
+}
+
+
+void addPathToZip(zipFile zf, const char *filenameinzip, const char *password, int opt_exclude_path,int opt_compress_level) {
+    tinydir_dir dir;
+    int i;
+    char newname[512];
+
+    tinydir_open_sorted(&dir, filenameinzip);
+
+    for (i = 0; i < dir.n_files; i++)
+    {
+        tinydir_file file;
+        tinydir_readfile_n(&dir, &file, i);
+        if(strcmp(file.name,".")==0) continue;
+        if(strcmp(file.name,"..")==0) continue;
+        sprintf(newname,"%s/%s",dir.path,file.name);
+        if (file.is_dir)
+        {
+            addPathToZip(zf,newname,password,opt_exclude_path,opt_compress_level);
+        } else {
+            addFileToZip(zf,newname,password,opt_exclude_path,opt_compress_level);
+        }
+    }
+
+    tinydir_close(&dir);
+}
+
+
 int main(argc,argv)
     int argc;
     char *argv[];
 {
     int i;
-    int opt_overwrite=0;
+    int opt_recursive=0;
+    int opt_overwrite=1;
     int opt_compress_level=Z_DEFAULT_COMPRESSION;
     int opt_exclude_path=0;
     int zipfilenamearg = 0;
@@ -285,7 +425,8 @@ int main(argc,argv)
                         opt_compress_level = c-'0';
                     if ((c=='j') || (c=='J'))
                         opt_exclude_path = 1;
-
+                    if ((c=='r') || (c=='R'))
+                        opt_recursive = 1;
                     if (((c=='p') || (c=='P')) && (i+1<argc))
                     {
                         password=argv[i+1];
@@ -392,117 +533,14 @@ int main(argc,argv)
                   ((argv[i][1]=='o') || (argv[i][1]=='O') ||
                    (argv[i][1]=='a') || (argv[i][1]=='A') ||
                    (argv[i][1]=='p') || (argv[i][1]=='P') ||
+                   (argv[i][1]=='r') || (argv[i][1]=='R') ||
                    ((argv[i][1]>='0') || (argv[i][1]<='9'))) &&
                   (strlen(argv[i]) == 2)))
             {
-                FILE * fin;
-                int size_read;
-                const char* filenameinzip = argv[i];
-                const char *savefilenameinzip;
-                zip_fileinfo zi;
-                unsigned long crcFile=0;
-                int zip64 = 0;
-
-                zi.tmz_date.tm_sec = zi.tmz_date.tm_min = zi.tmz_date.tm_hour =
-                zi.tmz_date.tm_mday = zi.tmz_date.tm_mon = zi.tmz_date.tm_year = 0;
-                zi.dosDate = 0;
-                zi.internal_fa = 0;
-                zi.external_fa = 0;
-                filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);
-
-/*
-                err = zipOpenNewFileInZip(zf,filenameinzip,&zi,
-                                 NULL,0,NULL,0,NULL / * comment * /,
-                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
-                                 opt_compress_level);
-*/
-                if ((password != NULL) && (err==ZIP_OK))
-                    err = getFileCrc(filenameinzip,buf,size_buf,&crcFile);
-
-                zip64 = isLargeFile(filenameinzip);
-
-                                                         /* The path name saved, should not include a leading slash. */
-               /*if it did, windows/xp and dynazip couldn't read the zip file. */
-                 savefilenameinzip = filenameinzip;
-                 while( savefilenameinzip[0] == '\\' || savefilenameinzip[0] == '/' )
-                 {
-                     savefilenameinzip++;
-                 }
-
-                 /*should the zip file contain any path at all?*/
-                 if( opt_exclude_path )
-                 {
-                     const char *tmpptr;
-                     const char *lastslash = 0;
-                     for( tmpptr = savefilenameinzip; *tmpptr; tmpptr++)
-                     {
-                         if( *tmpptr == '\\' || *tmpptr == '/')
-                         {
-                             lastslash = tmpptr;
-                         }
-                     }
-                     if( lastslash != NULL )
-                     {
-                         savefilenameinzip = lastslash+1; // base filename follows last slash.
-                     }
-                 }
-
-                 /**/
-                err = zipOpenNewFileInZip3_64(zf,savefilenameinzip,&zi,
-                                 NULL,0,NULL,0,NULL /* comment*/,
-                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
-                                 opt_compress_level,0,
-                                 /* -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, */
-                                 -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
-                                 password,crcFile, zip64);
-
-                if (err != ZIP_OK)
-                    printf("error in opening %s in zipfile\n",filenameinzip);
-                else
-                {
-                    fin = FOPEN_FUNC(filenameinzip,"rb");
-                    if (fin==NULL)
-                    {
-                        err=ZIP_ERRNO;
-                        printf("error in opening %s for reading\n",filenameinzip);
-                    }
-                }
-
-                if (err == ZIP_OK)
-                    do
-                    {
-                        err = ZIP_OK;
-                        size_read = (int)fread(buf,1,size_buf,fin);
-                        if (size_read < size_buf)
-                            if (feof(fin)==0)
-                        {
-                            printf("error in reading %s\n",filenameinzip);
-                            err = ZIP_ERRNO;
-                        }
-
-                        if (size_read>0)
-                        {
-                            err = zipWriteInFileInZip (zf,buf,size_read);
-                            if (err<0)
-                            {
-                                printf("error in writing %s in the zipfile\n",
-                                                 filenameinzip);
-                            }
-
-                        }
-                    } while ((err == ZIP_OK) && (size_read>0));
-
-                if (fin)
-                    fclose(fin);
-
-                if (err<0)
-                    err=ZIP_ERRNO;
-                else
-                {
-                    err = zipCloseFileInZip(zf);
-                    if (err!=ZIP_OK)
-                        printf("error in closing %s in the zipfile\n",
-                                    filenameinzip);
+                if(opt_recursive) {
+                    addPathToZip(zf,argv[i],password,opt_exclude_path,opt_compress_level);
+                } else {
+                    addFileToZip(zf,argv[i],password,opt_exclude_path,opt_compress_level);
                 }
             }
         }
diff --git a/compat/zlib/contrib/minizip/tinydir.h b/compat/zlib/contrib/minizip/tinydir.h
new file mode 100755
index 0000000..eb34399
--- /dev/null
+++ b/compat/zlib/contrib/minizip/tinydir.h
@@ -0,0 +1,816 @@
+/*
+Copyright (c) 2013-2017, tinydir authors:
+- Cong Xu
+- Lautis Sun
+- Baudouin Feildel
+- Andargor <andargor@yahoo.com>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#ifndef TINYDIR_H
+#define TINYDIR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if ((defined _UNICODE) && !(defined UNICODE))
+#define UNICODE
+#endif
+
+#if ((defined UNICODE) && !(defined _UNICODE))
+#define _UNICODE
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef _MSC_VER
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include <tchar.h>
+# pragma warning(push)
+# pragma warning (disable : 4996)
+#else
+# include <dirent.h>
+# include <libgen.h>
+# include <sys/stat.h>
+# include <stddef.h>
+#endif
+#ifdef __MINGW32__
+# include <tchar.h>
+#endif
+
+
+/* types */
+
+/* Windows UNICODE wide character support */
+#if defined _MSC_VER || defined __MINGW32__
+# define _tinydir_char_t TCHAR
+# define TINYDIR_STRING(s) _TEXT(s)
+# define _tinydir_strlen _tcslen
+# define _tinydir_strcpy _tcscpy
+# define _tinydir_strcat _tcscat
+# define _tinydir_strcmp _tcscmp
+# define _tinydir_strrchr _tcsrchr
+# define _tinydir_strncmp _tcsncmp
+#else
+# define _tinydir_char_t char
+# define TINYDIR_STRING(s) s
+# define _tinydir_strlen strlen
+# define _tinydir_strcpy strcpy
+# define _tinydir_strcat strcat
+# define _tinydir_strcmp strcmp
+# define _tinydir_strrchr strrchr
+# define _tinydir_strncmp strncmp
+#endif
+
+#if (defined _MSC_VER || defined __MINGW32__)
+# include <windows.h>
+# define _TINYDIR_PATH_MAX MAX_PATH
+#elif defined  __linux__
+# include <limits.h>
+# define _TINYDIR_PATH_MAX PATH_MAX
+#elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
+# include <sys/param.h>
+# if defined(BSD)
+#  include <limits.h>
+#  define _TINYDIR_PATH_MAX PATH_MAX
+# endif
+#endif
+
+#ifndef _TINYDIR_PATH_MAX
+#define _TINYDIR_PATH_MAX 4096
+#endif
+
+#ifdef _MSC_VER
+/* extra chars for the "\\*" mask */
+# define _TINYDIR_PATH_EXTRA 2
+#else
+# define _TINYDIR_PATH_EXTRA 0
+#endif
+
+#define _TINYDIR_FILENAME_MAX 256
+
+#if (defined _MSC_VER || defined __MINGW32__)
+#define _TINYDIR_DRIVE_MAX 3
+#endif
+
+#ifdef _MSC_VER
+# define _TINYDIR_FUNC static __inline
+#elif !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
+# define _TINYDIR_FUNC static __inline__
+#else
+# define _TINYDIR_FUNC static inline
+#endif
+
+/* readdir_r usage; define TINYDIR_USE_READDIR_R to use it (if supported) */
+#ifdef TINYDIR_USE_READDIR_R
+
+/* readdir_r is a POSIX-only function, and may not be available under various
+ * environments/settings, e.g. MinGW. Use readdir fallback */
+#if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE ||\
+	_POSIX_SOURCE
+# define _TINYDIR_HAS_READDIR_R
+#endif
+#if _POSIX_C_SOURCE >= 200112L
+# define _TINYDIR_HAS_FPATHCONF
+# include <unistd.h>
+#endif
+#if _BSD_SOURCE || _SVID_SOURCE || \
+	(_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)
+# define _TINYDIR_HAS_DIRFD
+# include <sys/types.h>
+#endif
+#if defined _TINYDIR_HAS_FPATHCONF && defined _TINYDIR_HAS_DIRFD &&\
+	defined _PC_NAME_MAX
+# define _TINYDIR_USE_FPATHCONF
+#endif
+#if defined __MINGW32__ || !defined _TINYDIR_HAS_READDIR_R ||\
+	!(defined _TINYDIR_USE_FPATHCONF || defined NAME_MAX)
+# define _TINYDIR_USE_READDIR
+#endif
+
+/* Use readdir by default */
+#else
+# define _TINYDIR_USE_READDIR
+#endif
+
+/* MINGW32 has two versions of dirent, ASCII and UNICODE*/
+#ifndef _MSC_VER
+#if (defined __MINGW32__) && (defined _UNICODE)
+#define _TINYDIR_DIR _WDIR
+#define _tinydir_dirent _wdirent
+#define _tinydir_opendir _wopendir
+#define _tinydir_readdir _wreaddir
+#define _tinydir_closedir _wclosedir
+#else
+#define _TINYDIR_DIR DIR
+#define _tinydir_dirent dirent
+#define _tinydir_opendir opendir
+#define _tinydir_readdir readdir
+#define _tinydir_closedir closedir
+#endif
+#endif
+
+/* Allow user to use a custom allocator by defining _TINYDIR_MALLOC and _TINYDIR_FREE. */
+#if    defined(_TINYDIR_MALLOC) &&  defined(_TINYDIR_FREE)
+#elif !defined(_TINYDIR_MALLOC) && !defined(_TINYDIR_FREE)
+#else
+#error "Either define both alloc and free or none of them!"
+#endif
+
+#if !defined(_TINYDIR_MALLOC)
+	#define _TINYDIR_MALLOC(_size) malloc(_size)
+	#define _TINYDIR_FREE(_ptr)    free(_ptr)
+#endif /* !defined(_TINYDIR_MALLOC) */
+
+typedef struct tinydir_file
+{
+	_tinydir_char_t path[_TINYDIR_PATH_MAX];
+	_tinydir_char_t name[_TINYDIR_FILENAME_MAX];
+	_tinydir_char_t *extension;
+	int is_dir;
+	int is_reg;
+
+#ifndef _MSC_VER
+#ifdef __MINGW32__
+	struct _stat _s;
+#else
+	struct stat _s;
+#endif
+#endif
+} tinydir_file;
+
+typedef struct tinydir_dir
+{
+	_tinydir_char_t path[_TINYDIR_PATH_MAX];
+	int has_next;
+	size_t n_files;
+
+	tinydir_file *_files;
+#ifdef _MSC_VER
+	HANDLE _h;
+	WIN32_FIND_DATA _f;
+#else
+	_TINYDIR_DIR *_d;
+	struct _tinydir_dirent *_e;
+#ifndef _TINYDIR_USE_READDIR
+	struct _tinydir_dirent *_ep;
+#endif
+#endif
+} tinydir_dir;
+
+
+/* declarations */
+
+_TINYDIR_FUNC
+int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path);
+_TINYDIR_FUNC
+int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path);
+_TINYDIR_FUNC
+void tinydir_close(tinydir_dir *dir);
+
+_TINYDIR_FUNC
+int tinydir_next(tinydir_dir *dir);
+_TINYDIR_FUNC
+int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file);
+_TINYDIR_FUNC
+int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i);
+_TINYDIR_FUNC
+int tinydir_open_subdir_n(tinydir_dir *dir, size_t i);
+
+_TINYDIR_FUNC
+int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path);
+_TINYDIR_FUNC
+void _tinydir_get_ext(tinydir_file *file);
+_TINYDIR_FUNC
+int _tinydir_file_cmp(const void *a, const void *b);
+#ifndef _MSC_VER
+#ifndef _TINYDIR_USE_READDIR
+_TINYDIR_FUNC
+size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp);
+#endif
+#endif
+
+
+/* definitions*/
+
+_TINYDIR_FUNC
+int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path)
+{
+#ifndef _MSC_VER
+#ifndef _TINYDIR_USE_READDIR
+	int error;
+	int size;	/* using int size */
+#endif
+#else
+	_tinydir_char_t path_buf[_TINYDIR_PATH_MAX];
+#endif
+	_tinydir_char_t *pathp;
+
+	if (dir == NULL || path == NULL || _tinydir_strlen(path) == 0)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
+	{
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+
+	/* initialise dir */
+	dir->_files = NULL;
+#ifdef _MSC_VER
+	dir->_h = INVALID_HANDLE_VALUE;
+#else
+	dir->_d = NULL;
+#ifndef _TINYDIR_USE_READDIR
+	dir->_ep = NULL;
+#endif
+#endif
+	tinydir_close(dir);
+
+	_tinydir_strcpy(dir->path, path);
+	/* Remove trailing slashes */
+	pathp = &dir->path[_tinydir_strlen(dir->path) - 1];
+	while (pathp != dir->path && (*pathp == TINYDIR_STRING('\\') || *pathp == TINYDIR_STRING('/')))
+	{
+		*pathp = TINYDIR_STRING('\0');
+		pathp++;
+	}
+#ifdef _MSC_VER
+	_tinydir_strcpy(path_buf, dir->path);
+	_tinydir_strcat(path_buf, TINYDIR_STRING("\\*"));
+#if (defined WINAPI_FAMILY) && (WINAPI_FAMILY != WINAPI_FAMILY_DESKTOP_APP)
+	dir->_h = FindFirstFileEx(path_buf, FindExInfoStandard, &dir->_f, FindExSearchNameMatch, NULL, 0);
+#else
+	dir->_h = FindFirstFile(path_buf, &dir->_f);
+#endif
+	if (dir->_h == INVALID_HANDLE_VALUE)
+	{
+		errno = ENOENT;
+#else
+	dir->_d = _tinydir_opendir(path);
+	if (dir->_d == NULL)
+	{
+#endif
+		goto bail;
+	}
+
+	/* read first file */
+	dir->has_next = 1;
+#ifndef _MSC_VER
+#ifdef _TINYDIR_USE_READDIR
+	dir->_e = _tinydir_readdir(dir->_d);
+#else
+	/* allocate dirent buffer for readdir_r */
+	size = _tinydir_dirent_buf_size(dir->_d); /* conversion to int */
+	if (size == -1) return -1;
+	dir->_ep = (struct _tinydir_dirent*)_TINYDIR_MALLOC(size);
+	if (dir->_ep == NULL) return -1;
+
+	error = readdir_r(dir->_d, dir->_ep, &dir->_e);
+	if (error != 0) return -1;
+#endif
+	if (dir->_e == NULL)
+	{
+		dir->has_next = 0;
+	}
+#endif
+
+	return 0;
+
+bail:
+	tinydir_close(dir);
+	return -1;
+}
+
+_TINYDIR_FUNC
+int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path)
+{
+	/* Count the number of files first, to pre-allocate the files array */
+	size_t n_files = 0;
+	if (tinydir_open(dir, path) == -1)
+	{
+		return -1;
+	}
+	while (dir->has_next)
+	{
+		n_files++;
+		if (tinydir_next(dir) == -1)
+		{
+			goto bail;
+		}
+	}
+	tinydir_close(dir);
+
+	if (tinydir_open(dir, path) == -1)
+	{
+		return -1;
+	}
+
+	dir->n_files = 0;
+	dir->_files = (tinydir_file *)_TINYDIR_MALLOC(sizeof *dir->_files * n_files);
+	if (dir->_files == NULL)
+	{
+		goto bail;
+	}
+	while (dir->has_next)
+	{
+		tinydir_file *p_file;
+		dir->n_files++;
+
+		p_file = &dir->_files[dir->n_files - 1];
+		if (tinydir_readfile(dir, p_file) == -1)
+		{
+			goto bail;
+		}
+
+		if (tinydir_next(dir) == -1)
+		{
+			goto bail;
+		}
+
+		/* Just in case the number of files has changed between the first and
+		second reads, terminate without writing into unallocated memory */
+		if (dir->n_files == n_files)
+		{
+			break;
+		}
+	}
+
+	qsort(dir->_files, dir->n_files, sizeof(tinydir_file), _tinydir_file_cmp);
+
+	return 0;
+
+bail:
+	tinydir_close(dir);
+	return -1;
+}
+
+_TINYDIR_FUNC
+void tinydir_close(tinydir_dir *dir)
+{
+	if (dir == NULL)
+	{
+		return;
+	}
+
+	memset(dir->path, 0, sizeof(dir->path));
+	dir->has_next = 0;
+	dir->n_files = 0;
+	_TINYDIR_FREE(dir->_files);
+	dir->_files = NULL;
+#ifdef _MSC_VER
+	if (dir->_h != INVALID_HANDLE_VALUE)
+	{
+		FindClose(dir->_h);
+	}
+	dir->_h = INVALID_HANDLE_VALUE;
+#else
+	if (dir->_d)
+	{
+		_tinydir_closedir(dir->_d);
+	}
+	dir->_d = NULL;
+	dir->_e = NULL;
+#ifndef _TINYDIR_USE_READDIR
+	_TINYDIR_FREE(dir->_ep);
+	dir->_ep = NULL;
+#endif
+#endif
+}
+
+_TINYDIR_FUNC
+int tinydir_next(tinydir_dir *dir)
+{
+	if (dir == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (!dir->has_next)
+	{
+		errno = ENOENT;
+		return -1;
+	}
+
+#ifdef _MSC_VER
+	if (FindNextFile(dir->_h, &dir->_f) == 0)
+#else
+#ifdef _TINYDIR_USE_READDIR
+	dir->_e = _tinydir_readdir(dir->_d);
+#else
+	if (dir->_ep == NULL)
+	{
+		return -1;
+	}
+	if (readdir_r(dir->_d, dir->_ep, &dir->_e) != 0)
+	{
+		return -1;
+	}
+#endif
+	if (dir->_e == NULL)
+#endif
+	{
+		dir->has_next = 0;
+#ifdef _MSC_VER
+		if (GetLastError() != ERROR_SUCCESS &&
+			GetLastError() != ERROR_NO_MORE_FILES)
+		{
+			tinydir_close(dir);
+			errno = EIO;
+			return -1;
+		}
+#endif
+	}
+
+	return 0;
+}
+
+_TINYDIR_FUNC
+int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file)
+{
+	if (dir == NULL || file == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+#ifdef _MSC_VER
+	if (dir->_h == INVALID_HANDLE_VALUE)
+#else
+	if (dir->_e == NULL)
+#endif
+	{
+		errno = ENOENT;
+		return -1;
+	}
+	if (_tinydir_strlen(dir->path) +
+		_tinydir_strlen(
+#ifdef _MSC_VER
+			dir->_f.cFileName
+#else
+			dir->_e->d_name
+#endif
+		) + 1 + _TINYDIR_PATH_EXTRA >=
+		_TINYDIR_PATH_MAX)
+	{
+		/* the path for the file will be too long */
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+	if (_tinydir_strlen(
+#ifdef _MSC_VER
+			dir->_f.cFileName
+#else
+			dir->_e->d_name
+#endif
+		) >= _TINYDIR_FILENAME_MAX)
+	{
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+
+	_tinydir_strcpy(file->path, dir->path);
+	_tinydir_strcat(file->path, TINYDIR_STRING("/"));
+	_tinydir_strcpy(file->name,
+#ifdef _MSC_VER
+		dir->_f.cFileName
+#else
+		dir->_e->d_name
+#endif
+	);
+	_tinydir_strcat(file->path, file->name);
+#ifndef _MSC_VER
+#ifdef __MINGW32__
+	if (_tstat(
+#else
+	if (stat(
+#endif
+		file->path, &file->_s) == -1)
+	{
+		return -1;
+	}
+#endif
+	_tinydir_get_ext(file);
+
+	file->is_dir =
+#ifdef _MSC_VER
+		!!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
+#else
+		S_ISDIR(file->_s.st_mode);
+#endif
+	file->is_reg =
+#ifdef _MSC_VER
+		!!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) ||
+		(
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DEVICE) &&
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED) &&
+#ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_INTEGRITY_STREAM) &&
+#endif
+#ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NO_SCRUB_DATA) &&
+#endif
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) &&
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY));
+#else
+		S_ISREG(file->_s.st_mode);
+#endif
+
+	return 0;
+}
+
+_TINYDIR_FUNC
+int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i)
+{
+	if (dir == NULL || file == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (i >= dir->n_files)
+	{
+		errno = ENOENT;
+		return -1;
+	}
+
+	memcpy(file, &dir->_files[i], sizeof(tinydir_file));
+	_tinydir_get_ext(file);
+
+	return 0;
+}
+
+_TINYDIR_FUNC
+int tinydir_open_subdir_n(tinydir_dir *dir, size_t i)
+{
+	_tinydir_char_t path[_TINYDIR_PATH_MAX];
+	if (dir == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (i >= dir->n_files || !dir->_files[i].is_dir)
+	{
+		errno = ENOENT;
+		return -1;
+	}
+
+	_tinydir_strcpy(path, dir->_files[i].path);
+	tinydir_close(dir);
+	if (tinydir_open_sorted(dir, path) == -1)
+	{
+		return -1;
+	}
+
+	return 0;
+}
+
+/* Open a single file given its path */
+_TINYDIR_FUNC
+int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path)
+{
+	tinydir_dir dir;
+	int result = 0;
+	int found = 0;
+	_tinydir_char_t dir_name_buf[_TINYDIR_PATH_MAX];
+	_tinydir_char_t file_name_buf[_TINYDIR_FILENAME_MAX];
+	_tinydir_char_t *dir_name;
+	_tinydir_char_t *base_name;
+#if (defined _MSC_VER || defined __MINGW32__)
+	_tinydir_char_t drive_buf[_TINYDIR_PATH_MAX];
+	_tinydir_char_t ext_buf[_TINYDIR_FILENAME_MAX];
+#endif
+
+	if (file == NULL || path == NULL || _tinydir_strlen(path) == 0)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
+	{
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+
+	/* Get the parent path */
+#if (defined _MSC_VER || defined __MINGW32__)
+#if ((defined _MSC_VER) && (_MSC_VER >= 1400))
+		_tsplitpath_s(
+			path,
+			drive_buf, _TINYDIR_DRIVE_MAX,
+			dir_name_buf, _TINYDIR_FILENAME_MAX,
+			file_name_buf, _TINYDIR_FILENAME_MAX,
+			ext_buf, _TINYDIR_FILENAME_MAX);
+#else
+		_tsplitpath(
+			path,
+			drive_buf,
+			dir_name_buf,
+			file_name_buf,
+			ext_buf);
+#endif
+
+/* _splitpath_s not work fine with only filename and widechar support */
+#ifdef _UNICODE
+		if (drive_buf[0] == L'\xFEFE')
+			drive_buf[0] = '\0';
+		if (dir_name_buf[0] == L'\xFEFE')
+			dir_name_buf[0] = '\0';
+#endif
+
+	if (errno)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	/* Emulate the behavior of dirname by returning "." for dir name if it's
+	empty */
+	if (drive_buf[0] == '\0' && dir_name_buf[0] == '\0')
+	{
+		_tinydir_strcpy(dir_name_buf, TINYDIR_STRING("."));
+	}
+	/* Concatenate the drive letter and dir name to form full dir name */
+	_tinydir_strcat(drive_buf, dir_name_buf);
+	dir_name = drive_buf;
+	/* Concatenate the file name and extension to form base name */
+	_tinydir_strcat(file_name_buf, ext_buf);
+	base_name = file_name_buf;
+#else
+	_tinydir_strcpy(dir_name_buf, path);
+	dir_name = dirname(dir_name_buf);
+	_tinydir_strcpy(file_name_buf, path);
+	base_name =basename(file_name_buf);
+#endif
+
+	/* Open the parent directory */
+	if (tinydir_open(&dir, dir_name) == -1)
+	{
+		return -1;
+	}
+
+	/* Read through the parent directory and look for the file */
+	while (dir.has_next)
+	{
+		if (tinydir_readfile(&dir, file) == -1)
+		{
+			result = -1;
+			goto bail;
+		}
+		if (_tinydir_strcmp(file->name, base_name) == 0)
+		{
+			/* File found */
+			found = 1;
+			break;
+		}
+		tinydir_next(&dir);
+	}
+	if (!found)
+	{
+		result = -1;
+		errno = ENOENT;
+	}
+
+bail:
+	tinydir_close(&dir);
+	return result;
+}
+
+_TINYDIR_FUNC
+void _tinydir_get_ext(tinydir_file *file)
+{
+	_tinydir_char_t *period = _tinydir_strrchr(file->name, TINYDIR_STRING('.'));
+	if (period == NULL)
+	{
+		file->extension = &(file->name[_tinydir_strlen(file->name)]);
+	}
+	else
+	{
+		file->extension = period + 1;
+	}
+}
+
+_TINYDIR_FUNC
+int _tinydir_file_cmp(const void *a, const void *b)
+{
+	const tinydir_file *fa = (const tinydir_file *)a;
+	const tinydir_file *fb = (const tinydir_file *)b;
+	if (fa->is_dir != fb->is_dir)
+	{
+		return -(fa->is_dir - fb->is_dir);
+	}
+	return _tinydir_strncmp(fa->name, fb->name, _TINYDIR_FILENAME_MAX);
+}
+
+#ifndef _MSC_VER
+#ifndef _TINYDIR_USE_READDIR
+/*
+The following authored by Ben Hutchings <ben@decadent.org.uk>
+from https://womble.decadent.org.uk/readdir_r-advisory.html
+*/
+/* Calculate the required buffer size (in bytes) for directory      *
+* entries read from the given directory handle.  Return -1 if this  *
+* this cannot be done.                                              *
+*                                                                   *
+* This code does not trust values of NAME_MAX that are less than    *
+* 255, since some systems (including at least HP-UX) incorrectly    *
+* define it to be a smaller value.                                  */
+_TINYDIR_FUNC
+size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp)
+{
+	long name_max;
+	size_t name_end;
+	/* parameter may be unused */
+	(void)dirp;
+
+#if defined _TINYDIR_USE_FPATHCONF
+	name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
+	if (name_max == -1)
+#if defined(NAME_MAX)
+		name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
+#else
+		return (size_t)(-1);
+#endif
+#elif defined(NAME_MAX)
+ 	name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
+#else
+#error "buffer size for readdir_r cannot be determined"
+#endif
+	name_end = (size_t)offsetof(struct _tinydir_dirent, d_name) + name_max + 1;
+	return (name_end > sizeof(struct _tinydir_dirent) ?
+		name_end : sizeof(struct _tinydir_dirent));
+}
+#endif
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+# if defined (_MSC_VER)
+# pragma warning(pop)
+# endif
+
+#endif
diff --git a/compat/zlib/win32/zdll.lib b/compat/zlib/win32/zdll.lib
index a3e9a39..a3e9a39 100755..100644
--- a/compat/zlib/win32/zdll.lib
+++ b/compat/zlib/win32/zdll.lib
diff --git a/doc/CrtObjCmd.3 b/doc/CrtObjCmd.3
index 6714bd7..87ce07e 100644
--- a/doc/CrtObjCmd.3
+++ b/doc/CrtObjCmd.3
@@ -8,7 +8,7 @@
 .so man.macros
 .BS
 .SH NAME
-Tcl_CreateObjCommand, Tcl_DeleteCommand, Tcl_DeleteCommandFromToken, Tcl_GetCommandInfo, Tcl_GetCommandInfoFromToken, Tcl_SetCommandInfo, Tcl_SetCommandInfoFromToken, Tcl_GetCommandName, Tcl_GetCommandFullName, Tcl_GetCommandFromObj \- implement new commands in C
+Tcl_CreateObjCommand, Tcl_DeleteCommand, Tcl_DeleteCommandFromToken, Tcl_GetCommandInfo, Tcl_GetCommandInfoFromToken, Tcl_SetCommandInfo, Tcl_SetCommandInfoFromToken, Tcl_GetCommandName, Tcl_GetCommandFullName, Tcl_GetCommandFromObj Tcl_RegisterCommandTypeName, Tcl_GetCommandTypeName \- implement new commands in C
 .SH SYNOPSIS
 .nf
 \fB#include <tcl.h>\fR
@@ -42,6 +42,14 @@ void
 .sp
 Tcl_Command
 \fBTcl_GetCommandFromObj\fR(\fIinterp, objPtr\fR)
+.sp
+.VS "info cmdtype feature"
+void
+\fBTcl_RegisterCommandTypeName\fR(\fIproc, typeName\fR)
+.sp
+const char *
+\fBTcl_GetCommandTypeName\fR(\fItoken\fR)
+.VE "info cmdtype feature"
 .SH ARGUMENTS
 .AS Tcl_CmdDeleteProc *deleteProc in/out
 .AP Tcl_Interp *interp in
@@ -65,6 +73,9 @@ Pointer to structure containing various information about a
 Tcl command.
 .AP Tcl_Obj *objPtr in
 Value containing the name of a Tcl command.
+.AP "const char" *typeName in
+Indicates the name of the type of command implementation associated
+with a particular \fIproc\fR, or NULL to break the association.
 .BE
 .SH DESCRIPTION
 .PP
@@ -296,6 +307,22 @@ is appended to the value specified by \fIobjPtr\fR.
 specified by the name in a \fBTcl_Obj\fR.
 The command name is resolved relative to the current namespace.
 Returns NULL if the command is not found.
+.PP
+.VS "info cmdtype feature"
+\fBTcl_RegisterCommandTypeName\fR is used to associate a name (the
+\fItypeName\fR argument) with a particular implementation function so that it
+can then be looked up with \fBTcl_GetCommandTypeName\fR, which in turn is
+called with a command token that information is wanted for and which returns
+the name of the type that was registered for the implementation function used
+for that command. (The lookup functionality is surfaced virtually directly in Tcl via
+\fBinfo cmdtype\fR.) If there is no function registered for a particular
+function, the result will be the string literal
+.QW \fBnative\fR .
+The registration of a name can be undone by registering a mapping to NULL
+instead. The result from \fBTcl_GetCommandTypeName\fR will be exactly that
+string which was registered, and not a copy; use of a compile-time constant
+string is \fIstrongly recommended\fR.
+.VE "info cmdtype feature"
 .SH "SEE ALSO"
 Tcl_CreateCommand(3), Tcl_ResetResult(3), Tcl_SetObjResult(3)
 .SH KEYWORDS
diff --git a/doc/SaveResult.3 b/doc/SaveResult.3
index 51ccb23..e62d22d 100644
--- a/doc/SaveResult.3
+++ b/doc/SaveResult.3
@@ -1,7 +1,7 @@
 '\"
 '\" Copyright (c) 1997 by Sun Microsystems, Inc.
 '\" Contributions from Don Porter, NIST, 2004. (not subject to US copyright)
-'\" Copyright (c) 2018 Nathan Coulter. 
+'\" Copyright (c) 2018 Nathan Coulter.
 '\"
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/doc/Thread.3 b/doc/Thread.3
index 5966a71..2005c93 100644
--- a/doc/Thread.3
+++ b/doc/Thread.3
@@ -45,7 +45,9 @@ int
 .AP Tcl_Condition *condPtr in
 A condition variable, which must be associated with a mutex lock.
 .AP Tcl_Mutex *mutexPtr in
-A mutex lock.
+.VS TIP509
+A recursive mutex lock.
+.VE TIP509
 .AP "const Tcl_Time" *timePtr in
 A time limit on the condition wait.  NULL to wait forever.
 Note that a polling value of 0 seconds does not make much sense.
@@ -140,8 +142,12 @@ of code by calling \fBTcl_MutexLock\fR and \fBTcl_MutexUnlock\fR.
 If one thread holds a mutex, any other thread calling \fBTcl_MutexLock\fR will
 block until \fBTcl_MutexUnlock\fR is called.
 A mutex can be destroyed after its use by calling \fBTcl_MutexFinalize\fR.
-The result of locking a mutex twice from the same thread is undefined.
-On some platforms it will result in a deadlock.
+.VS TIP509
+Mutexes are reentrant: they can be locked several times from the same
+thread. However there must be exactly one call to
+\fBTcl_MutexUnlock\fR for each call to \fBTcl_MutexLock\fR in order
+for a thread to release a mutex completely.
+.VE TIP509
 The \fBTcl_MutexLock\fR, \fBTcl_MutexUnlock\fR and \fBTcl_MutexFinalize\fR
 procedures are defined as empty macros if not compiling with threads enabled.
 For declaration of mutexes the \fBTCL_DECLARE_MUTEX\fR macro should be used.
diff --git a/doc/append.n b/doc/append.n
index e3bf224..99b4ece 100644
--- a/doc/append.n
+++ b/doc/append.n
@@ -20,6 +20,11 @@ Append all of the \fIvalue\fR arguments to the current value
 of variable \fIvarName\fR.  If \fIvarName\fR does not exist,
 it is given a value equal to the concatenation of all the
 \fIvalue\fR arguments.
+.VS TIP508
+If \fIvarName\fR indicate an element that does not exist of an array that has
+a default value set, the concatenation of the default value and all the
+\fIvalue\fR arguments will be stored in the array element.
+.VE TIP508
 The result of this command is the new value stored in variable
 \fIvarName\fR.
 This command provides an efficient way to build up long
@@ -44,6 +49,7 @@ puts $var
 concat(n), lappend(n)
 .SH KEYWORDS
 append, variable
-'\" Local Variables:
-'\" mode: nroff
-'\" End:
+.\" Local variables:
+.\" mode: nroff
+.\" fill-column: 78
+.\" End:
diff --git a/doc/array.n b/doc/array.n
index d6d4dff..bbfcd9f 100644
--- a/doc/array.n
+++ b/doc/array.n
@@ -5,7 +5,7 @@
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\"
-.TH array n 8.3 Tcl "Tcl Built-In Commands"
+.TH array n 8.7 Tcl "Tcl Built-In Commands"
 .so man.macros
 .BS
 '\" Note:  do not modify the .SH NAME line immediately below!
@@ -36,6 +36,53 @@ with an empty name, since the return value from
 \fBarray nextelement\fR will not indicate whether the search
 has been completed.
 .TP
+\fBarray default \fIsubcommand arrayName args...\fR
+.VS TIP508
+Manages the default value of the array. Arrays initially have no default
+value, but this command allows you to set one; the default value will be
+returned when reading from an element of the array \farrayName\fR if the read
+would otherwise result in an error. Note that this may cause the \fBappend\fR,
+\fBdict\fR, \fBincr\fR and \fBlappend\fR commands to change their behavior in
+relation to non-existing array elements.
+.RS
+.PP
+The \fIsubcommand\fR argument controls what exact operation will be performed
+on the default value of \fIarrayName\fR. Supported \fIsubcommand\fRs are:
+.VE TIP508
+.TP
+\fBarray default exists \fIarrayName\fR
+.VS TIP508
+This returns a boolean value indicating whether a default value has been set
+for the array \fIarrayName\fR. Returns a false value if \fIarrayName\fR does
+not exist. Raises an error if \fIarrayName\fR is an existing variable that is
+not an array.
+.VE TIP508
+.TP
+\fBarray default get \fIarrayName\fR
+.VS TIP508
+This returns the current default value for the array \fIarrayName\fR.  Raises
+an error if \fIarrayName\fR is an existing variable that is not an array, or
+if \fIarrayName\fR is an array without a default value.
+.VE TIP508
+.TP
+\fBarray default set \fIarrayName value\fR
+.VS TIP508
+This sets the default value for the array \fIarrayName\fR to \fIvalue\fR.
+Returns the empty string. Raises an error if \fIarrayName\fR is an existing
+variable that is not an array, or if \fIarrayName\fR is an illegal name for an
+array. If \fIarrayName\fR does not currently exist, it is created as an empty
+array as well as having its default value set.
+.VE TIP508
+.TP
+\fBarray default unset \fIarrayName\fR
+.VS TIP508
+This removes the default value for the array \fIarrayName\fR and returns the
+empty string. Does nothing if \fIarrayName\fR does not have a default
+value. Raises an error if \fIarrayName\fR is an existing variable that is not
+an array.
+.VE TIP508
+.RE
+.TP
 \fBarray donesearch \fIarrayName searchId\fR
 This command terminates an array search and destroys all the
 state associated with that search.  \fISearchId\fR indicates
@@ -194,3 +241,7 @@ foreach color [lsort [\fBarray names\fR colorcount]] {
 list(n), string(n), variable(n), trace(n), foreach(n)
 .SH KEYWORDS
 array, element names, search
+.\" Local variables:
+.\" mode: nroff
+.\" fill-column: 78
+.\" End:
diff --git a/doc/cd.n b/doc/cd.n
index dceb075..8e19191 100644
--- a/doc/cd.n
+++ b/doc/cd.n
@@ -41,3 +41,7 @@ current one:
 filename(n), glob(n), pwd(n)
 .SH KEYWORDS
 working directory
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/clock.n b/doc/clock.n
index e8fb8f7..a85f29f 100644
--- a/doc/clock.n
+++ b/doc/clock.n
@@ -886,40 +886,46 @@ The \fIinputString\fR argument consists of zero or more specifications of the
 following form:
 .TP
 \fItime\fR
-A time of day, which is of the form: \fBhh?:mm?:ss?? ?meridian? ?zone?\fR
-or \fBhhmm ?meridian? ?zone?\fR
-If no meridian is specified, \fBhh\fR is interpreted on
+.
+A time of day, which is of the form:
+.QW "\fIhh\fR?\fB:\fImm\fR?\fB:\fIss\fR?? ?\fImeridian\fR? ?\fIzone\fR?"
+or
+.QW "\fBhhmm \fR?\fBmeridian\fR? ?\fBzone\fR?" .
+If no \fImeridian\fR is specified, \fIhh\fR is interpreted on
 a 24-hour clock.
 .TP
 \fIdate\fR
+.
 A specific month and day with optional year.  The
 acceptable formats are
-.QW "\fBmm/dd\fR?\fB/yy\fR?" ,
-.QW "\fBmonthname dd\fR?\fB, yy\fR?" ,
-.QW "\fBday, dd monthname \fR?\fByy\fR?" ,
-.QW "\fBdd monthname yy\fR" ,
-.QW "?\fBCC\fR?\fByymmdd\fR" ,
+.QW "\fImm\fB/\fIdd\fR?\fB/\fIyy\fR?" ,
+.QW "\fImonthname dd\fR?\fB, \fIyy\fR?" ,
+.QW "\fIday\fB, \fIdd monthname \fR?\fIyy\fR?" ,
+.QW "\fIdd monthname yy\fR" ,
+.QW "?\fICC\fR?\fIyymmdd\fR" ,
 and
-.QW "\fBdd-monthname-\fR?\fBCC\fR?\fByy\fR" .
+.QW "\fIdd\fB-\fImonthname\fB-\fR?\fICC\fR?\fIyy\fR" .
 The default year is the current year.  If the year is less
 than 100, we treat the years 00-68 as 2000-2068 and the years 69-99
 as 1969-1999.  Not all platforms can represent the years 38-70, so
 an error may result if these years are used.
 .TP
 \fIISO 8601 point-in-time\fR
+.
 An ISO 8601 point-in-time specification, such as
 .QW \fICCyymmdd\fBT\fIhhmmss\fR,
 where \fBT\fR is the literal
 .QW T ,
 .QW "\fICCyymmdd hhmmss\fR" ,
 or
-.QW \fICCyymmdd\fBT\fIhh:mm:ss\fR .
+.QW \fICCyymmdd\fBT\fIhh\fB:\fImm\fB:\fIss\fR .
 Note that only these three formats are accepted.
 The command does \fInot\fR accept the full range of point-in-time
 specifications specified in ISO8601.  Other formats can be recognized by
 giving an explicit \fB\-format\fR option to the \fBclock scan\fR command.
 .TP
 \fIrelative time\fR
+.
 A specification relative to the current time.  The format is \fBnumber
 unit\fR. Acceptable units are \fByear\fR, \fBfortnight\fR,
 \fBmonth\fR, \fBweek\fR, \fBday\fR,
diff --git a/doc/define.n b/doc/define.n
index 6353d00..883d5fa 100644
--- a/doc/define.n
+++ b/doc/define.n
@@ -426,7 +426,7 @@ Some of the configurable definitions of a class or object are \fIslotted
 definitions\fR. This means that the configuration is implemented by a slot
 object, that is an instance of the class \fBoo::Slot\fR, which manages a list
 of values (class names, variable names, etc.) that comprises the contents of
-the slot. The class defines three operations (as methods) that may be done on
+the slot. The class defines five operations (as methods) that may be done on
 the slot:
 .TP
 \fIslot\fR \fB\-append\fR ?\fImember ...\fR?
@@ -437,6 +437,16 @@ This appends the given \fImember\fR elements to the slot definition.
 .
 This sets the slot definition to the empty list.
 .TP
+\fIslot\fR \fB\-prepend\fR ?\fImember ...\fR?
+.VS TIP516
+This prepends the given \fImember\fR elements to the slot definition.
+.VE TIP516
+.TP
+\fIslot\fR \fB\-remove\fR ?\fImember ...\fR?
+.VS TIP516
+This removes the given \fImember\fR elements from the slot definition.
+.VE TIP516
+.TP
 \fIslot\fR \fB\-set\fR ?\fImember ...\fR?
 .
 This replaces the slot definition with the given \fImember\fR elements.
@@ -454,15 +464,52 @@ and these methods which provide the implementation interface:
 .TP
 \fIslot\fR \fBGet\fR
 .
-Returns a list that is the current contents of the slot. This method must
-always be called from a stack frame created by a call to \fBoo::define\fR or
-\fBoo::objdefine\fR.
+Returns a list that is the current contents of the slot, but does not modify
+the slot. This method must always be called from a stack frame created by a
+call to \fBoo::define\fR or \fBoo::objdefine\fR. This method \fIshould not\fR
+return an error unless it is called from outside a definition context or with
+the wrong number of arguments.
+.RS
+.PP
+.VS TIP516
+The elements of the list should be fully resolved, if that is a meaningful
+concept to the slot.
+.VE TIP516
+.RE
+.TP
+\fIslot\fR \fBResolve\fR \fIslotElement\fR
+.VS TIP516
+Returns \fIslotElement\fR with a resolution operation applied to it, but does
+not modify the slot. For slots of simple strings, this is an operation that
+does nothing, whereas for slots of classes, this maps a class name to its
+fully-qualified class name.  This method must always be called from a stack
+frame created by a call to \fBoo::define\fR or \fBoo::objdefine\fR.  This
+method \fIshould not\fR return an error unless it is called from outside a
+definition context or with the wrong number of arguments; unresolvable
+arguments should be returned as is (as not all slot operations strictly
+require that values are resolvable to work).
+.RS
+.PP
+Implementations \fIshould not\fR enforce uniqueness and ordering constraints
+in this method; that is the responsibility of the \fBSet\fR method.
+.RE
+.VE TIP516
 .TP
 \fIslot\fR \fBSet \fIelementList\fR
 .
 Sets the contents of the slot to the list \fIelementList\fR and returns the
 empty string. This method must always be called from a stack frame created by
-a call to \fBoo::define\fR or \fBoo::objdefine\fR.
+a call to \fBoo::define\fR or \fBoo::objdefine\fR. This method may return an
+error if it rejects the change to the slot contents (e.g., because of invalid
+values) as well as if it is called from outside a definition context or with
+the wrong number of arguments.
+.RS
+.PP
+This method \fImay\fR reorder and filter the elements if this is necessary in
+order to satisfy the underlying constraints of the slot. (For example, slots
+of classes enforce a uniqueness constraint that places each element in the
+earliest location in the slot that it can.)
+.RE
 .PP
 The implementation of these methods is slot-dependent (and responsible for
 accessing the correct part of the class or object definition). Slots also have
@@ -470,6 +517,14 @@ an unknown method handler to tie all these pieces together, and they hide
 their \fBdestroy\fR method so that it is not invoked inadvertently. It is
 \fIrecommended\fR that any user changes to the slot mechanism be restricted to
 defining new operations whose names start with a hyphen.
+.PP
+.VS TIP516
+Most slot operations will initially \fBResolve\fR their argument list, combine
+it with the results of the \fBGet\fR method, and then \fBSet\fR the result.
+Some operations omit one or both of the first two steps; omitting the third
+would result in an idempotent read-only operation (but the standard mechanism
+for reading from slots is via \fBinfo class\fR and \fBinfo object\fR).
+.VE TIP516
 .SH EXAMPLES
 This example demonstrates how to use both forms of the \fBoo::define\fR and
 \fBoo::objdefine\fR commands (they work in the same way), as well as
diff --git a/doc/dict.n b/doc/dict.n
index cd7e94c..1829768 100644
--- a/doc/dict.n
+++ b/doc/dict.n
@@ -27,6 +27,11 @@ key maps to in the dictionary value contained in the given variable,
 writing the resulting dictionary value back to that variable.
 Non-existent keys are treated as if they map to an empty string. The
 updated dictionary value is returned.
+.VS TIP508
+If \fIdictionaryVarable\fR indicates an element that does not exist of an
+array that has a default value set, the default value and will be used as the
+value of the dictionary prior to the appending operation.
+.VE TIP508
 .TP
 \fBdict create \fR?\fIkey value ...\fR?
 .
@@ -124,6 +129,11 @@ resulting dictionary value back to that variable. Non-existent keys
 are treated as if they map to 0. It is an error to increment a value
 for an existing key if that value is not an integer. The updated
 dictionary value is returned.
+.VS TIP508
+If \fIdictionaryVarable\fR indicates an element that does not exist of an
+array that has a default value set, the default value and will be used as the
+value of the dictionary prior to the incrementing operation.
+.VE TIP508
 .TP
 \fBdict info \fIdictionaryValue\fR
 .
@@ -149,6 +159,11 @@ keys are treated as if they map to an empty list, and it is legal for
 there to be no items to append to the list. It is an error for the
 value that the key maps to to not be representable as a list. The
 updated dictionary value is returned.
+.VS TIP508
+If \fIdictionaryVarable\fR indicates an element that does not exist of an
+array that has a default value set, the default value and will be used as the
+value of the dictionary prior to the list-appending operation.
+.VE TIP508
 .TP
 \fBdict map \fR{\fIkeyVariable valueVariable\fR} \fIdictionaryValue body\fR
 .
@@ -206,6 +221,11 @@ value and places an updated dictionary value in that variable
 containing a mapping from the given key to the given value. When
 multiple keys are present, this operation creates or updates a chain
 of nested dictionaries. The updated dictionary value is returned.
+.VS TIP508
+If \fIdictionaryVarable\fR indicates an element that does not exist of an
+array that has a default value set, the default value and will be used as the
+value of the dictionary prior to the value insert/update operation.
+.VE TIP508
 .TP
 \fBdict size \fIdictionaryValue\fR
 .
@@ -221,6 +241,11 @@ through nested dictionaries to the mapping to remove. At least one key
 must be specified, but the last key on the key-path need not exist.
 All other components on the path must exist. The updated dictionary
 value is returned.
+.VS TIP508
+If \fIdictionaryVarable\fR indicates an element that does not exist of an
+array that has a default value set, the default value and will be used as the
+value of the dictionary prior to the value remove operation.
+.VE TIP508
 .TP
 \fBdict update \fIdictionaryVariable key varName \fR?\fIkey varName ...\fR? \fIbody\fR
 .
@@ -236,6 +261,11 @@ are silently discarded), even if the result of \fIbody\fR is an error
 or some other kind of exceptional exit. The result of \fBdict
 update\fR is (unless some kind of error occurs) the result of the
 evaluation of \fIbody\fR.
+.VS TIP508
+If \fIdictionaryVarable\fR indicates an element that does not exist of an
+array that has a default value set, the default value and will be used as the
+value of the dictionary prior to the update operation.
+.VE TIP508
 .RS
 .PP
 Each \fIvarName\fR is mapped in the scope enclosing the \fBdict update\fR;
@@ -270,6 +300,11 @@ dictionary be discarded, and this also happens if the contents of
 dictionaries no longer exists. The result of \fBdict with\fR is
 (unless some kind of error occurs) the result of the evaluation of
 \fIbody\fR.
+.VS TIP508
+If \fIdictionaryVarable\fR indicates an element that does not exist of an
+array that has a default value set, the default value and will be used as the
+value of the dictionary prior to the updating operation.
+.VE TIP508
 .RS
 .PP
 The variables are mapped in the scope enclosing the \fBdict with\fR;
diff --git a/doc/eof.n b/doc/eof.n
index a150464..0dcf34a 100644
--- a/doc/eof.n
+++ b/doc/eof.n
@@ -59,3 +59,7 @@ while {1} {
 file(n), open(n), close(n), fblocked(n), Tcl_StandardChannels(3)
 .SH KEYWORDS
 channel, end of file
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/exec.n b/doc/exec.n
index d78c34a..99dfdc5 100644
--- a/doc/exec.n
+++ b/doc/exec.n
@@ -224,10 +224,10 @@ Although it is the common escape algorithm, but, in fact, the way how the
 executable parses the command-line (resp. splits it into single arguments)
 is decisive.
 .PP
-Unfortunately, there is currently no way to supply newline character within 
-an argument to the batch files (\fB.cmd\fR or \fB.bat\fR) or to the command 
+Unfortunately, there is currently no way to supply newline character within
+an argument to the batch files (\fB.cmd\fR or \fB.bat\fR) or to the command
 processor (\fBcmd.exe /c\fR), because this causes truncation of command-line
-(also the argument chain) on the first newline character. 
+(also the argument chain) on the first newline character.
 But it works properly with an executable (using CommandLineToArgv, etc).
 .PP
 The Tk console text widget does not provide real standard IO capabilities.
diff --git a/doc/exit.n b/doc/exit.n
index a005c08..36676b1 100644
--- a/doc/exit.n
+++ b/doc/exit.n
@@ -49,3 +49,7 @@ if {[catch {main} msg options]} {
 exec(n)
 .SH KEYWORDS
 abort, exit, process
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/fblocked.n b/doc/fblocked.n
index 93cfe87..0a28dcf 100644
--- a/doc/fblocked.n
+++ b/doc/fblocked.n
@@ -65,3 +65,7 @@ vwait forever
 gets(n), open(n), read(n), socket(n), Tcl_StandardChannels(3)
 .SH KEYWORDS
 blocking, nonblocking
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/fileevent.n b/doc/fileevent.n
index 2751040..bbba997 100644
--- a/doc/fileevent.n
+++ b/doc/fileevent.n
@@ -154,3 +154,7 @@ fconfigure(n), gets(n), interp(n), puts(n), read(n), Tcl_StandardChannels(3)
 .SH KEYWORDS
 asynchronous I/O, blocking, channel, event handler, nonblocking, readable,
 script, writable.
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/filename.n b/doc/filename.n
index 87ba467..f160eff 100644
--- a/doc/filename.n
+++ b/doc/filename.n
@@ -176,3 +176,7 @@ file(n), glob(n)
 .SH KEYWORDS
 current directory, absolute file name, relative file name,
 volume-relative file name, portability
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/flush.n b/doc/flush.n
index 6b98ab7..1d84383 100644
--- a/doc/flush.n
+++ b/doc/flush.n
@@ -43,3 +43,7 @@ puts "Hello there, $name!"
 file(n), open(n), socket(n), Tcl_StandardChannels(3)
 .SH KEYWORDS
 blocking, buffer, channel, flush, nonblocking, output
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/foreach.n b/doc/foreach.n
index 925ec1f..43f961a 100644
--- a/doc/foreach.n
+++ b/doc/foreach.n
@@ -102,3 +102,7 @@ for(n), while(n), break(n), continue(n)
 
 .SH KEYWORDS
 foreach, iteration, list, loop
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/global.n b/doc/global.n
index 9848817..e6d2678b 100644
--- a/doc/global.n
+++ b/doc/global.n
@@ -56,3 +56,7 @@ proc accum {string} {
 namespace(n), upvar(n), variable(n)
 .SH KEYWORDS
 global, namespace, procedure, variable
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/history.n b/doc/history.n
index 0391948..05d936e 100644
--- a/doc/history.n
+++ b/doc/history.n
@@ -100,3 +100,7 @@ the \fBevent\fR operation to retrieve some event,
 and the \fBadd\fR operation to add it to history and execute it.
 .SH KEYWORDS
 event, history, record
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/http.n b/doc/http.n
index 40ced23..a986704 100644
--- a/doc/http.n
+++ b/doc/http.n
@@ -6,22 +6,24 @@
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\"
-.TH "http" n 2.7 http "Tcl Bundled Packages"
+.TH "http" n 2.9 http "Tcl Bundled Packages"
 .so man.macros
 .BS
 '\" Note:  do not modify the .SH NAME line immediately below!
 .SH NAME
 http \- Client-side implementation of the HTTP/1.1 protocol
 .SH SYNOPSIS
-\fBpackage require http ?2.7?\fR
+\fBpackage require http\fI ?\fB2.8\fR?
 .\" See Also -useragent option documentation in body!
 .sp
-\fB::http::config ?\fI\-option value\fR ...?
+\fB::http::config\fR ?\fI\-option value\fR ...?
 .sp
 \fB::http::geturl \fIurl\fR ?\fI\-option value\fR ...?
 .sp
 \fB::http::formatQuery\fR \fIkey value\fR ?\fIkey value\fR ...?
 .sp
+\fB::http::quoteString\fR \fIvalue\fR
+.sp
 \fB::http::reset\fR \fItoken\fR ?\fIwhy\fR?
 .sp
 \fB::http::wait \fItoken\fR
@@ -44,12 +46,14 @@ http \- Client-side implementation of the HTTP/1.1 protocol
 .sp
 \fB::http::register \fIproto port command\fR
 .sp
+\fB::http::registerError \fIport\fR ?\fImessage\fR?
+.sp
 \fB::http::unregister \fIproto\fR
 .BE
 .SH DESCRIPTION
 .PP
 The \fBhttp\fR package provides the client side of the HTTP/1.1
-protocol, as defined in RFC 2616.
+protocol, as defined in RFC 7230 to RFC 7235, which supersede RFC 2616.
 The package implements the GET, POST, and HEAD operations
 of HTTP/1.1.  It allows configuration of a proxy host to get through
 firewalls.  The package is compatible with the \fBSafesock\fR security
@@ -95,6 +99,19 @@ comma-separated list of mime type patterns that you are
 willing to receive.  For example,
 .QW "image/gif, image/jpeg, text/*" .
 .TP
+\fB\-pipeline\fR \fIboolean\fR
+.
+Specifies whether HTTP/1.1 transactions on a persistent socket will be
+pipelined.  See the \fBPERSISTENT SOCKETS\fR section for details. The default
+is 1.
+.TP
+\fB\-postfresh\fR \fIboolean\fR
+.
+Specifies whether requests that use the \fBPOST\fR method will always use a
+fresh socket, overriding the \fB-keepalive\fR option of
+command \fBhttp::geturl\fR.  See the \fBPERSISTENT SOCKETS\fR section for details.
+The default is 0.
+.TP
 \fB\-proxyhost\fR \fIhostname\fR
 .
 The name of the proxy host, if any.  If this value is the
@@ -116,20 +133,47 @@ an empty list.  The default filter returns the values of the
 \fB\-proxyhost\fR and \fB\-proxyport\fR settings if they are
 non-empty.
 .TP
+\fB\-repost\fR \fIboolean\fR
+.
+Specifies what to do if a POST request over a persistent connection fails
+because the server has half-closed the connection.  If boolean \fBtrue\fR, the
+request
+will be automatically retried; if boolean \fBfalse\fR it will not, and the
+application
+that uses \fBhttp::geturl\fR is expected to seek user confirmation before
+retrying the POST.  The value \fBtrue\fR should be used only under certain
+conditions. See the \fBPERSISTENT SOCKETS\fR section for details. The
+default is 0.
+.TP
 \fB\-urlencoding\fR \fIencoding\fR
 .
 The \fIencoding\fR used for creating the x-url-encoded URLs with
-\fB::http::formatQuery\fR.  The default is \fButf-8\fR, as specified by RFC
+\fB::http::formatQuery\fR and \fB::http::quoteString\fR.
+The default is \fButf-8\fR, as specified by RFC
 2718.  Prior to http 2.5 this was unspecified, and that behavior can be
 returned by specifying the empty string (\fB{}\fR), although
 \fIiso8859-1\fR is recommended to restore similar behavior but without the
-\fB::http::formatQuery\fR throwing an error processing non-latin-1
-characters.
+\fB::http::formatQuery\fR or \fB::http::quoteString\fR
+throwing an error processing non-latin-1 characters.
 .TP
 \fB\-useragent\fR \fIstring\fR
 .
-The value of the User-Agent header in the HTTP request.  The default is
-.QW "\fBTcl http client package 2.7\fR" .
+The value of the User-Agent header in the HTTP request.  In an unsafe
+interpreter, the default value depends upon the operating system, and
+the version numbers of \fBhttp\fR and \fBTcl\fR, and is (for example)
+.QW "\fBMozilla/5.0 (Windows; U; Windows NT 10.0) http/2.8.12 Tcl/8.6.8\fR" .
+A safe interpreter cannot determine its operating system, and so the default
+in a safe interpreter is to use a Windows 10 value with the current version
+numbers of \fBhttp\fR and \fBTcl\fR.
+.TP
+\fB\-zip\fR \fIboolean\fR
+.
+If the value is boolean \fBtrue\fR, then by default requests will send a header
+.QW "\fBAccept-Encoding: gzip,deflate,compress\fR" .
+If the value is boolean \fBfalse\fR, then by default this header will not be sent.
+In either case the default can be overridden for an individual request by
+supplying a custom \fBAccept-Encoding\fR header in the \fB-headers\fR option
+of \fBhttp::geturl\fR. The default is 1.
 .RE
 .TP
 \fB::http::geturl\fR \fIurl\fR ?\fIoptions\fR?
@@ -227,7 +271,7 @@ Pragma: no-cache
 .TP
 \fB\-keepalive\fR \fIboolean\fR
 .
-If true, attempt to keep the connection open for servicing
+If boolean \fBtrue\fR, attempt to keep the connection open for servicing
 multiple requests.  Default is 0.
 .TP
 \fB\-method\fR \fItype\fR
@@ -334,6 +378,11 @@ encodes the keys and values, and generates one string that has the
 proper & and = separators.  The result is suitable for the
 \fB\-query\fR value passed to \fB::http::geturl\fR.
 .TP
+\fB::http::quoteString\fR \fIvalue\fR
+.
+This procedure does x-url-encoding of string.  It takes a single argument and
+encodes it.
+.TP
 \fB::http::reset\fR \fItoken\fR ?\fIwhy\fR?
 .
 This command resets the HTTP transaction identified by \fItoken\fR, if any.
@@ -415,6 +464,17 @@ set token [::http::geturl https://my.secure.site/]
 .CE
 .RE
 .TP
+\fB::http::registerError\fR \fIport\fR ?\fImessage\fR?
+.
+This procedure allows a registered protocol handler to deliver an error
+message for use by \fBhttp\fR.  Calling this command does not raise an
+error. The command is useful when a registered protocol detects an problem
+(for example, an invalid TLS certificate) that will cause an error to
+propagate to \fBhttp\fR.  The command allows \fBhttp\fR to provide a
+precise error message rather than a general one.  The command returns the
+value provided by the last call with argument \fImessage\fR, or the empty
+string if no such call has been made.
+.TP
 \fB::http::unregister\fR \fIproto\fR
 .
 This procedure unregisters a protocol handler that was previously
@@ -504,6 +564,14 @@ The following elements of
 the array are supported:
 .RS
 .TP
+\fBbinary\fR
+.
+This is boolean \fBtrue\fR if (after decoding any compression specified
+by the
+.QW "Content-Encoding"
+response header) the HTTP response is binary.  It is boolean \fBfalse\fR
+if the HTTP response is text.
+.TP
 \fBbody\fR
 .
 The contents of the URL.  This will be empty if the \fB\-channel\fR
@@ -602,6 +670,106 @@ A copy of the \fBContent-Type\fR meta-data value.
 .
 The requested URL.
 .RE
+.SH "PERSISTENT CONNECTIONS"
+.PP
+.SS "BASICS"
+.PP
+See RFC 7230 Sec 6, which supersedes RFC 2616 Sec 8.1.
+.PP
+A persistent connection allows multiple HTTP/1.1 transactions to be
+carried over the same TCP connection.  Pipelining allows a
+client to make multiple requests over a persistent connection without
+waiting for each response.  The server sends responses in the same order
+that the requests were received.
+.PP
+If a POST request fails to complete, typically user confirmation is
+needed before sending the request again.  The user may wish to verify
+whether the server was modified by the failed POST request, before
+sending the same request again.
+.PP
+A HTTP request will use a persistent socket if the call to
+\fBhttp::geturl\fR has the option \fB-keepalive true\fR. It will use
+pipelining where permitted if the \fBhttp::config\fR option
+\fB-pipeline\fR is boolean \fBtrue\fR (its default value).
+.PP
+The http package maintains no more than one persistent connection to each
+server (i.e. each value of
+.QW "domain:port" ).
+If \fBhttp::geturl\fR is called to make a request over a persistent
+connection while the connection is busy with another request, the new
+request will be held in a queue until the connection is free.
+.PP
+The http package does not support HTTP/1.0 persistent connections
+controlled by the \fBKeep-Alive\fR header.
+.SS "SPECIAL CASES"
+.PP
+This subsection discusses issues related to closure of the
+persistent connection by the server, automatic retry of failed requests,
+the special treatment necessary for POST requests, and the options for
+dealing with these cases.
+.PP
+In accordance with RFC 7230, \fBhttp::geturl\fR does not pipeline
+requests that use the POST method.  If a POST uses a persistent
+connection and is not the first request on that connection,
+\fBhttp::geturl\fR waits until it has received the response for the previous
+request; or (if \fBhttp::config\fR option \fB-postfresh\fR is boolean \fBtrue\fR) it
+uses a new connection for each POST.
+.PP
+If the server is processing a number of pipelined requests, and sends a
+response header
+.QW "\fBConnection: close\fR"
+with one of the responses (other than the last), then subsequent responses
+are unfulfilled. \fBhttp::geturl\fR will send the unfulfilled requests again
+over a new connection.
+.PP
+A difficulty arises when a HTTP client sends a request over a persistent
+connection that has been idle for a while.  The HTTP server may
+half-close an apparently idle connection while the client is sending a
+request, but before the request arrives at the server: in this case (an
+.QW "asynchronous close event" )
+the request will fail.  The difficulty arises because the client cannot
+be certain whether the POST modified the state of the server.  For HEAD or
+GET requests, \fBhttp::geturl\fR opens another connection and retransmits
+the failed request. However, if the request was a POST, RFC 7230 forbids
+automatic retry by default, suggesting either user confirmation, or
+confirmation by user-agent software that has semantic understanding of
+the application.  The \fBhttp::config\fR option \fB-repost\fR allows for
+either possibility.
+.PP
+Asynchronous close events can occur only in a short interval of time.  The
+\fBhttp\fR package monitors each persistent connection for closure by the
+server.  Upon detection, the connection is also closed at the client end,
+and subsequent requests will use a fresh connection.
+.PP
+If the \fBhttp::geturl\fR command is called with option \fB-keepalive true\fR,
+then it will both try to use an existing persistent connection
+(if one is available), and it will send the server a
+.QW "\fBConnection: keep-alive\fR"
+request header asking to keep the connection open for future requests.
+.PP
+The \fBhttp::config\fR options \fB-pipeline\fR, \fB-postfresh\fR, and
+\fB-repost\fR relate to persistent connections.
+.PP
+Option \fB-pipeline\fR, if boolean \fBtrue\fR, will pipeline GET and HEAD requests
+made
+over a persistent connection.  POST requests will not be pipelined - if the
+POST is not the first transaction on the connection, its request will not
+be sent until the previous response has finished.  GET and HEAD requests
+made after a POST will not be sent until the POST response has been
+delivered, and will not be sent if the POST fails.
+.PP
+Option \fB-postfresh\fR, if boolean \fBtrue\fR, will override the \fBhttp::geturl\fR option
+\fB-keepalive\fR, and always open a fresh connection for a POST request.
+.PP
+Option \fB-repost\fR, if \fBtrue\fR, permits automatic retry of a POST request
+that fails because it uses a persistent connection that the server has
+half-closed (an
+.QW "asynchronous close event" ).
+Subsequent GET and HEAD requests in a failed pipeline will also be retried.
+\fIThe -repost option should be used only if the application understands
+that the retry is appropriate\fR - specifically, the application must know
+that if the failed POST successfully modified the state of the server, a repeat POST
+would have no adverse effect.
 .SH EXAMPLE
 .PP
 This example creates a procedure to copy a URL to a file while printing a
diff --git a/doc/incr.n b/doc/incr.n
index b4be95c..f491903 100644
--- a/doc/incr.n
+++ b/doc/incr.n
@@ -27,6 +27,11 @@ and also returned as result.
 Starting with the Tcl 8.5 release, the variable \fIvarName\fR passed
 to \fBincr\fR may be unset, and in that case, it will be set to
 the value \fIincrement\fR or to the default increment value of \fB1\fR.
+.VS TIP508
+If \fIvarName\fR indicate an element that does not exist of an array that has
+a default value set, the sum of the default value and the \fIincrement\fR (or
+1) will be stored in the array element.
+.VE TIP508
 .SH EXAMPLES
 .PP
 Add one to the contents of the variable \fIx\fR:
@@ -59,3 +64,7 @@ an error if it is not):
 expr(n), set(n)
 .SH KEYWORDS
 add, increment, variable, value
+.\" Local variables:
+.\" mode: nroff
+.\" fill-column: 78
+.\" End:
diff --git a/doc/info.n b/doc/info.n
index 02470af..5732a13 100644
--- a/doc/info.n
+++ b/doc/info.n
@@ -44,6 +44,42 @@ described in \fBCLASS INTROSPECTION\fR below.
 Returns a count of the total number of commands that have been invoked
 in this interpreter.
 .TP
+\fBinfo cmdtype \fIcommandName\fR
+.VS TIP426
+Returns a description of the kind of command named by \fIcommandName\fR.  The
+supported types are:
+.RS
+.IP \fBalias\fR
+Indicates that \fIcommandName\fR was created by \fBinterp alias\fR. Note that
+safe interpreters can only see a subset of aliases (specifically those between
+two commands within themselves).
+.IP \fBcoroutine\fR
+Indicates that \fIcommandName\fR was created by \fBcoroutine\fR.
+.IP \fBensemble\fR
+Indicates that \fIcommandName\fR was created by \fBnamespace ensemble\fR.
+.IP \fBimport\fR
+Indicates that \fIcommandName\fR was created by \fBnamespace import\fR.
+.IP \fBnative\fR
+Indicates that \fIcommandName\fR was created by the \fBTcl_CreateObjProc\fR
+interface directly without further registration of the type of command.
+.IP \fBobject\fR
+Indicates that \fIcommandName\fR is the public command that represents an
+instance of \fBoo::object\fR or one of its subclasses.
+.IP \fBprivateObject\fR
+Indicates that \fIcommandName\fR is the private command (\fBmy\fR by default)
+that represents an instance of \fBoo::object\fR or one of its subclasses.
+.IP \fBproc\fR
+Indicates that \fIcommandName\fR was created by \fBproc\fR.
+.IP \fBslave\fR
+Indicates that \fIcommandName\fR was created by \fBinterp create\fR.
+.IP \fBzlibStream\fR
+Indicates that \fIcommandName\fR was created by \fBzlib stream\fR.
+.PP
+There may be other registered types as well; this is a set that is extensible
+at the implementation level with \fBTcl_RegisterCommandTypeName\fR.
+.RE
+.VE TIP426
+.TP
 \fBinfo commands \fR?\fIpattern\fR?
 .
 If \fIpattern\fR is not specified,
diff --git a/doc/interp.n b/doc/interp.n
index ac07fb7..e91e403 100644
--- a/doc/interp.n
+++ b/doc/interp.n
@@ -236,7 +236,7 @@ attempts are silently ignored. This is needed to maintain the
 consistency of the underlying interpreter's state.
 .RE
 .TP
-\fBinterp\fR \fBdelete \fR?\fIpath ...?\fR
+\fBinterp\fR \fBdelete \fR?\fIpath ...\fR?
 .
 Deletes zero or more interpreters given by the optional \fIpath\fR
 arguments, and for each interpreter, it also deletes its slaves. The
diff --git a/doc/join.n b/doc/join.n
index 23a7697..7dcde98 100644
--- a/doc/join.n
+++ b/doc/join.n
@@ -42,3 +42,7 @@ set data {1 {2 3} 4 {5 {6 7} 8}}
 list(n), lappend(n), split(n)
 .SH KEYWORDS
 element, join, list, separator
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/lappend.n b/doc/lappend.n
index 80d075a..66bea5f 100644
--- a/doc/lappend.n
+++ b/doc/lappend.n
@@ -22,6 +22,12 @@ and appends each of the \fIvalue\fR arguments to that list as a separate
 element, with spaces between elements.
 If \fIvarName\fR does not exist, it is created as a list with elements
 given by the \fIvalue\fR arguments.
+.VS TIP508
+If \fIvarName\fR indicate an element that does not exist of an array that has
+a default value set, list that is comprised of the default value with all the
+\fIvalue\fR arguments appended as elements will be stored in the array
+element.
+.VE TIP508
 \fBLappend\fR is similar to \fBappend\fR except that the \fIvalue\fRs
 are appended as list elements rather than raw text.
 This command provides a relatively efficient way to build up
@@ -47,3 +53,7 @@ list(n), lindex(n), linsert(n), llength(n), lset(n),
 lsort(n), lrange(n)
 .SH KEYWORDS
 append, element, list, variable
+.\" Local variables:
+.\" mode: nroff
+.\" fill-column: 78
+.\" End:
diff --git a/doc/lindex.n b/doc/lindex.n
index d5605bc..be4f169 100644
--- a/doc/lindex.n
+++ b/doc/lindex.n
@@ -13,7 +13,7 @@
 .SH NAME
 lindex \- Retrieve an element from a list
 .SH SYNOPSIS
-\fBlindex \fIlist ?index ...?\fR
+\fBlindex \fIlist\fR ?\fIindex ...\fR?
 .BE
 .SH DESCRIPTION
 .PP
diff --git a/doc/llength.n b/doc/llength.n
index 79f93c0..7e46064 100644
--- a/doc/llength.n
+++ b/doc/llength.n
@@ -53,3 +53,7 @@ list(n), lappend(n), lindex(n), linsert(n), lsearch(n),
 lset(n), lsort(n), lrange(n), lreplace(n)
 .SH KEYWORDS
 element, list, length
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/lrange.n b/doc/lrange.n
index ffa6dba..ba068f6 100644
--- a/doc/lrange.n
+++ b/doc/lrange.n
@@ -76,3 +76,7 @@ lset(n), lreplace(n), lsort(n),
 string(n)
 .SH KEYWORDS
 element, list, range, sublist
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/lrepeat.n b/doc/lrepeat.n
index f92792e..4719bfd 100644
--- a/doc/lrepeat.n
+++ b/doc/lrepeat.n
@@ -33,6 +33,9 @@ is identical to \fBlist element ...\fR.
 .CE
 .SH "SEE ALSO"
 list(n), lappend(n), linsert(n), llength(n), lset(n)
-
 .SH KEYWORDS
 element, index, list
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/lreplace.n b/doc/lreplace.n
index d19f0cd..32b7356 100644
--- a/doc/lreplace.n
+++ b/doc/lreplace.n
@@ -17,7 +17,7 @@ lreplace \- Replace elements in a list with new elements
 .BE
 .SH DESCRIPTION
 .PP
-\fBlreplace\fR returns a new list formed by replacing one or more elements of
+\fBlreplace\fR returns a new list formed by replacing zero or more elements of
 \fIlist\fR with the \fIelement\fR arguments.
 \fIfirst\fR and \fIlast\fR are index values specifying the first and
 last elements of the range to replace.
@@ -27,23 +27,26 @@ supporting simple index arithmetic and indices relative to the
 end of the list.
 0 refers to the first element of the
 list, and \fBend\fR refers to the last element of the list.
-If \fIlist\fR is empty, then \fIfirst\fR and \fIlast\fR are ignored.
 .PP
-If \fIfirst\fR is less than zero, it is considered to refer to before the
-first element of the list.  For non-empty lists, the element indicated
-by \fIfirst\fR must exist or \fIfirst\fR must indicate before the
-start of the list.
+If either \fIfirst\fR or \fIlast\fR is less than zero, it is considered
+to refer to before the first element of the list. This allows \fBlreplace\fR
+to prepend elements to \fIlist\fR.
+.VS TIP505
+If either \fIfirst\fR or \fIlast\fR indicates a position greater than the
+index of the last element of the list, it is treated as if it is an
+index one greater than the last element. This allows \fBlreplace\fR to
+append elements to \fIlist\fR.
+.VE TIP505
 .PP
 If \fIlast\fR is less than \fIfirst\fR, then any specified elements
-will be inserted into the list before the point specified by \fIfirst\fR
+will be inserted into the list before the element specified by \fIfirst\fR
 with no elements being deleted.
 .PP
-The \fIelement\fR arguments specify zero or more new arguments to
+The \fIelement\fR arguments specify zero or more new elements to
 be added to the list in place of those that were deleted.
 Each \fIelement\fR argument will become a separate element of
 the list.  If no \fIelement\fR arguments are specified, then the elements
-between \fIfirst\fR and \fIlast\fR are simply deleted.  If \fIlist\fR
-is empty, any \fIelement\fR arguments are added to the end of the list.
+between \fIfirst\fR and \fIlast\fR are simply deleted.
 .SH EXAMPLES
 .PP
 Replacing an element of a list with another:
@@ -78,9 +81,26 @@ proc lremove {listVariable value} {
     set var [\fBlreplace\fR $var $idx $idx]
 }
 .CE
+.PP
+.VS TIP505
+Appending elements to the list; note that \fBend+2\fR will initially
+be treated as if it is \fB6\fR here, but both that and \fB12345\fR are greater
+than the index of the final item so they behave identically:
+.PP
+.CS
+% set var {a b c d e}
+a b c d e
+% set var [\fBlreplace\fR $var 12345 end+2 f g h i]
+a b c d e f g h i
+.CE
+.VE TIP505
 .SH "SEE ALSO"
 list(n), lappend(n), lindex(n), linsert(n), llength(n), lsearch(n),
 lset(n), lrange(n), lsort(n),
 string(n)
 .SH KEYWORDS
 element, list, replace
+.\" Local variables:
+.\" mode: nroff
+.\" fill-column: 78
+.\" End:
diff --git a/doc/packagens.n b/doc/packagens.n
index 5bd2e67..a6eee1e 100644
--- a/doc/packagens.n
+++ b/doc/packagens.n
@@ -48,3 +48,7 @@ At least one \fB\-load\fR or \fB\-source\fR parameter must be given.
 package(n)
 .SH KEYWORDS
 auto-load, index, package, version
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/pid.n b/doc/pid.n
index 6f8c399..fa0af56 100644
--- a/doc/pid.n
+++ b/doc/pid.n
@@ -43,6 +43,9 @@ close $pipeline
 
 .SH "SEE ALSO"
 exec(n), open(n)
-
 .SH KEYWORDS
 file, pipeline, process identifier
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/platform.n b/doc/platform.n
index 5380ff4..7cb685d 100644
--- a/doc/platform.n
+++ b/doc/platform.n
@@ -12,7 +12,7 @@
 platform \- System identification support code and utilities
 .SH SYNOPSIS
 .nf
-\fBpackage require platform ?1.0.10?\fR
+\fBpackage require platform\fR ?\fB1.0.10\fR?
 .sp
 \fBplatform::generic\fR
 \fBplatform::identify\fR
diff --git a/doc/platform_shell.n b/doc/platform_shell.n
index 330afa9..a9e14d0 100644
--- a/doc/platform_shell.n
+++ b/doc/platform_shell.n
@@ -12,7 +12,7 @@
 platform::shell \- System identification support code and utilities
 .SH SYNOPSIS
 .nf
-\fBpackage require platform::shell ?1.1.4?\fR
+\fBpackage require platform::shell\fR ?\fB1.1.4\fR?
 .sp
 \fBplatform::shell::generic \fIshell\fR
 \fBplatform::shell::identify \fIshell\fR
@@ -55,3 +55,7 @@ This command returns the contents of \fBtcl_platform(platform)\fR for
 the specified Tcl shell.
 .SH KEYWORDS
 operating system, cpu architecture, platform, architecture
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/prefix.n b/doc/prefix.n
index 50aa2fb..d327a78 100644
--- a/doc/prefix.n
+++ b/doc/prefix.n
@@ -12,9 +12,9 @@
 tcl::prefix \- facilities for prefix matching
 .SH SYNOPSIS
 .nf
-\fB::tcl::prefix all\fR \fItable\fR \fIstring\fR
-\fB::tcl::prefix longest\fR \fItable\fR \fIstring\fR
-\fB::tcl::prefix match\fR \fI?option ...?\fR \fItable\fR \fIstring\fR
+\fB::tcl::prefix all\fR \fItable string\fR
+\fB::tcl::prefix longest\fR \fItable string\fR
+\fB::tcl::prefix match\fR ?\fIoption ...\fR? \fItable string\fR
 .fi
 .BE
 .SH DESCRIPTION
@@ -22,17 +22,17 @@ tcl::prefix \- facilities for prefix matching
 This document describes commands looking up a prefix in a list of strings.
 The following commands are supported:
 .TP
-\fB::tcl::prefix all\fR \fItable\fR \fIstring\fR
+\fB::tcl::prefix all\fR \fItable string\fR
 .
 Returns a list of all elements in \fItable\fR that begin with the prefix
 \fIstring\fR.
 .TP
-\fB::tcl::prefix longest\fR \fItable\fR \fIstring\fR
+\fB::tcl::prefix longest\fR \fItable string\fR
 .
 Returns the longest common prefix of all elements in \fItable\fR that
 begin with the prefix \fIstring\fR.
 .TP
-\fB::tcl::prefix match\fR ?\fIoptions\fR? \fItable\fR \fIstring\fR
+\fB::tcl::prefix match\fR ?\fIoptions\fR? \fItable string\fR
 .
 If \fIstring\fR equals one element in \fItable\fR or is a prefix to exactly
 one element, the matched element is returned. If not, the result depends
diff --git a/doc/process.n b/doc/process.n
index 536b98b..165e413 100644
--- a/doc/process.n
+++ b/doc/process.n
@@ -16,11 +16,31 @@ tcl::process \- Subprocess management
 .SH DESCRIPTION
 .PP
 This command provides a way to manage subprocesses created by the \fBopen\fR
-and \fBexec\fR commands. The legal \fIoptions\fR (which may be abbreviated) are:
+and \fBexec\fR commands, as identified by the process identifiers (PIDs) of
+those subprocesses. The legal \fIoptions\fR (which may be abbreviated) are:
+.TP
+\fB::tcl::process autopurge\fR ?\fIflag\fR?
+.
+Automatic purge facility. If \fIflag\fR is specified as a boolean value then
+it activates or deactivate autopurge. In all cases it returns the current
+status as a boolean value. When autopurge is active,
+\fBTcl_ReapDetachedProcs\fR is called each time the \fBexec\fR command is
+executed or a pipe channel created by \fBopen\fR is closed. When autopurge is
+inactive, \fB::tcl::process\fR purge must be called explicitly. By default
+autopurge is active.
 .TP
 \fB::tcl::process list\fR
 .
-Returns the list of subprocess PIDs.
+Returns the list of subprocess PIDs. This includes all currently executing
+subprocesses and all terminated subprocesses that have not yet had their
+corresponding process table entries purged.
+.TP
+\fB::tcl::process purge\fR ?\fIpids\fR?
+.
+Cleans up all data associated with terminated subprocesses. If \fIpids\fR is
+specified as a list of PIDs then the command only cleanup data for the matching
+subprocesses if they exist, and raises an error otherwise. If a process listed is
+still active, this command does nothing to that process.
 .TP
 \fB::tcl::process status\fR ?\fIswitches\fR? ?\fIpids\fR?
 .
@@ -29,62 +49,48 @@ Returns a dictionary mapping subprocess PIDs to their respective status. If
 status of the matching subprocesses if they exist, and raises an error
 otherwise. For active processes, the status is an empty value. For terminated
 processes, the status is a list with the following format:
-.QW "{code ?\fImsg errorCode\fR?}" ,
+.QW "\fB{\fIcode\fR ?\fImsg errorCode\fR?\fB}\fR" ,
 where:
 .RS
 .TP
-\fBcode\fR\0
+\fIcode\fR\0
 .
-is a standard Tcl return code,
+is a standard Tcl return code, i.e., \fB0\fR for TCL_OK and \fB1\fR
+for TCL_ERROR,
 .TP
-\fBmsg\fR\0
+\fImsg\fR\0
 .
 is the human-readable error message,
 .TP
-\fBerrorCode\fR\0
+\fIerrorCode\fR\0
 .
 uses the same format as the \fBerrorCode\fR global variable
-.RE
+.PP
 Note that \fBmsg\fR and \fBerrorCode\fR are only present for abnormally
-terminated processes (i.e. those where \fBcode\fR is nonzero). Under the hood
-this command calls \fBTcl_WaitPid\fR with the \fBWNOHANG\fR flag set for
+terminated processes (i.e. those where the \fIcode\fR is nonzero). Under the
+hood this command calls \fBTcl_WaitPid\fR with the \fBWNOHANG\fR flag set for
 non-blocking behavior, unless the \fB\-wait\fR switch is set (see below).
-.RS
 .PP
 Additionally, \fB::tcl::process status\fR accepts the following switches:
 .TP
 \fB\-wait\fR\0
 .
 By default the command returns immediately (the underlying \fBTcl_WaitPid\fR is
-called with the \fBWNOHANG\fR flag set) unless this switch is set. If \fBpids\fR
+called with the \fBWNOHANG\fR flag set) unless this switch is set. If \fIpids\fR
 is specified as a list of PIDs then the command waits until the status of the
-matching subprocesses are available. If \fBpids\fR is not specified then it
-waits for all known subprocesses.
+matching subprocesses are available. If \fIpids\fR was not specified, this
+command will wait for all known subprocesses.
 .TP
 \fB\-\|\-\fR
 .
 Marks the end of switches.  The argument following this one will
 be treated as the first \fIarg\fR even if it starts with a \fB\-\fR.
 .RE
-.TP
-\fB::tcl::process purge ?\fIpids\fR?
-.
-Cleans up all data associated with terminated subprocesses. If \fBpids\fR is
-specified as a list of PIDs then the command only cleanup data for the matching
-subprocesses if they exist, and raises an error otherwise. If the process is
-still active then it does nothing.
-.TP
-\fB::tcl::process autopurge ?\fIflag\fR?
-.
-Automatic purge facility. If \fBflag\fR is specified as a boolean value then it
-activates or deactivate autopurge. In all cases it returns the current status as
-a boolean value. When autopurge is active, \fBTcl_ReapDetachedProcs\fR is called
-each time the exec command is executed or a pipe channel created by open is
-closed. When autopurge is inactive, \fB::tcl::process\fR purge must be called
-explicitly. By default autopurge is active.
-.RE
 .SH "EXAMPLES"
 .PP
+These show the use of \fB::tcl::process\fR. Some of the results from
+\fB::tcl::process status\fR are split over multiple lines for readability.
+.PP
 .CS
 \fB::tcl::process autopurge\fR
      \fI\(-> true\fR
@@ -102,7 +108,12 @@ set pid2 [pid $chan]
      \fI\(-> 123 456 789 1011\fR
 
 \fB::tcl::process status\fR
-     \fI\(-> 123 0 456 {1 "child killed: write on pipe with no readers" {CHILDKILLED 456 SIGPIPE "write on pipe with no readers"}} 789 {1 "child suspended: background tty read" {CHILDSUSP 789 SIGTTIN "background tty read"}} 1011 {}\fR
+     \fI\(-> 123 0
+       456 {1 "child killed: write on pipe with no readers" {
+         CHILDKILLED 456 SIGPIPE "write on pipe with no readers"}}
+       789 {1 "child suspended: background tty read" {
+         CHILDSUSP 789 SIGTTIN "background tty read"}}
+       1011 {}\fR
 
 \fB::tcl::process status\fR 123
      \fI\(-> 123 0\fR
@@ -111,10 +122,17 @@ set pid2 [pid $chan]
      \fI\(-> 1011 {}\fR
 
 \fB::tcl::process status\fR -wait
-     \fI\(-> 123 0 456 {1 "child killed: write on pipe with no readers" {CHILDKILLED 456 SIGPIPE "write on pipe with no readers"}} 789 {1 "child suspended: background tty read" {CHILDSUSP 789 SIGTTIN "background tty read"}} 1011 {1 "child process exited abnormally" {CHILDSTATUS 1011 -1}}\fR
+     \fI\(-> 123 0
+       456 {1 "child killed: write on pipe with no readers" {
+         CHILDKILLED 456 SIGPIPE "write on pipe with no readers"}}
+       789 {1 "child suspended: background tty read" {
+         CHILDSUSP 789 SIGTTIN "background tty read"}}
+       1011 {1 "child process exited abnormally" {
+         CHILDSTATUS 1011 -1}}\fR
 
 \fB::tcl::process status\fR 1011
-     \fI\(-> 1011 {1 "child process exited abnormally" {CHILDSTATUS 1011 -1}}\fR
+     \fI\(-> 1011 {1 "child process exited abnormally" {
+         CHILDSTATUS 1011 -1}}\fR
 
 \fB::tcl::process purge\fR
 exec command1 1 2 3 &
@@ -123,7 +141,8 @@ exec command1 1 2 3 &
      \fI\(-> 1213\fR
 .CE
 .SH "SEE ALSO"
-exec(n), open(n), Tcl_DetachPids(3), Tcl_WaitPid(3), Tcl_ReapDetachedProcs(3)
+exec(n), open(n), pid(n),
+Tcl_DetachPids(3), Tcl_WaitPid(3), Tcl_ReapDetachedProcs(3)
 .SH "KEYWORDS"
 background, child, detach, process, wait
 '\" Local Variables:
diff --git a/doc/puts.n b/doc/puts.n
index f4e1040..0e23c80 100644
--- a/doc/puts.n
+++ b/doc/puts.n
@@ -96,3 +96,7 @@ close $chan
 file(n), fileevent(n), Tcl_StandardChannels(3)
 .SH KEYWORDS
 channel, newline, output, write
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/pwd.n b/doc/pwd.n
index 85dd390..e96cae5 100644
--- a/doc/pwd.n
+++ b/doc/pwd.n
@@ -37,3 +37,7 @@ cd $savedDir
 file(n), cd(n), glob(n), filename(n)
 .SH KEYWORDS
 working directory
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/rename.n b/doc/rename.n
index f74db5f..b064f66 100644
--- a/doc/rename.n
+++ b/doc/rename.n
@@ -43,3 +43,7 @@ proc ::source args {
 namespace(n), proc(n)
 .SH KEYWORDS
 command, delete, namespace, rename
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/set.n b/doc/set.n
index f065087..890ef1d 100644
--- a/doc/set.n
+++ b/doc/set.n
@@ -73,3 +73,7 @@ practice instead of doing double-dereferencing):
 expr(n), global(n), namespace(n), proc(n), trace(n), unset(n), upvar(n), variable(n)
 .SH KEYWORDS
 read, write, variable
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/source.n b/doc/source.n
index 82fefa6..3fc001e 100644
--- a/doc/source.n
+++ b/doc/source.n
@@ -69,3 +69,7 @@ foreach scriptFile {foo.tcl bar.tcl} {
 file(n), cd(n), encoding(n), info(n)
 .SH KEYWORDS
 file, script
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/string.n b/doc/string.n
index ccd87f3..7fd634a 100644
--- a/doc/string.n
+++ b/doc/string.n
@@ -12,7 +12,7 @@
 .SH NAME
 string \- Manipulate strings
 .SH SYNOPSIS
-\fBstring \fIoption arg \fR?\fIarg ...?\fR
+\fBstring \fIoption arg \fR?\fIarg ...\fR?
 .BE
 .SH DESCRIPTION
 .PP
diff --git a/doc/tclsh.1 b/doc/tclsh.1
index 0e59b4f..c37eb81 100644
--- a/doc/tclsh.1
+++ b/doc/tclsh.1
@@ -143,6 +143,15 @@ incomplete commands.
 .SH "STANDARD CHANNELS"
 .PP
 See \fBTcl_StandardChannels\fR for more explanations.
+.SH ZIPVFS
+.PP
+When a zipfile is concatenated to the end of a \fBtclsh\fR, on
+startup the contents of the zip archive will be mounted as the
+virtual file system /zvfs. If a top level directory tcl8.6 is
+present in the zip archive, it will become the directory loaded
+as env(TCL_LIBRARY). If a file named \fBmain.tcl\fR is present
+in the top level directory of the zip archive, it will be sourced
+instead of the shell's normal command line handing.
 .SH "SEE ALSO"
 auto_path(n), encoding(n), env(n), fconfigure(n)
 .SH KEYWORDS
diff --git a/doc/tell.n b/doc/tell.n
index a56e9e3..54fbae1 100644
--- a/doc/tell.n
+++ b/doc/tell.n
@@ -46,3 +46,7 @@ if {[read $chan 6] eq "foobar"} {
 file(n), open(n), close(n), gets(n), seek(n), Tcl_StandardChannels(3)
 .SH KEYWORDS
 access position, channel, seeking
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/trace.n b/doc/trace.n
index 5482e59..570b263 100644
--- a/doc/trace.n
+++ b/doc/trace.n
@@ -20,7 +20,8 @@ trace \- Monitor variable accesses, command usages and command executions
 This command causes Tcl commands to be executed whenever certain operations are
 invoked.  The legal \fIoption\fRs (which may be abbreviated) are:
 .TP
-\fBtrace add \fItype name ops ?args?\fR
+\fBtrace add \fItype name ops\fR ?\fIargs\fR?
+.
 Where \fItype\fR is \fBcommand\fR, \fBexecution\fR, or \fBvariable\fR.
 .RS
 .TP
diff --git a/doc/unknown.n b/doc/unknown.n
index 82dcefc..ee8a5be 100644
--- a/doc/unknown.n
+++ b/doc/unknown.n
@@ -89,3 +89,7 @@ proc \fBunknown\fR args {
 info(n), proc(n), interp(n), library(n), namespace(n)
 .SH KEYWORDS
 error, non-existent command, unknown
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/update.n b/doc/update.n
index ce0fb25..a85faac 100644
--- a/doc/update.n
+++ b/doc/update.n
@@ -63,3 +63,7 @@ while {!$done} {
 after(n), interp(n)
 .SH KEYWORDS
 asynchronous I/O, event, flush, handler, idle, update
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/uplevel.n b/doc/uplevel.n
index 4decc6d..cda1652 100644
--- a/doc/uplevel.n
+++ b/doc/uplevel.n
@@ -24,9 +24,9 @@ the result of that evaluation.
 If \fIlevel\fR is an integer then
 it gives a distance (up the procedure calling stack) to move before
 executing the command.  If \fIlevel\fR consists of \fB#\fR followed by
-a number then the number gives an absolute level number.  If \fIlevel\fR
+a integer then the level gives an absolute level.  If \fIlevel\fR
 is omitted then it defaults to \fB1\fR.  \fILevel\fR cannot be
-defaulted if the first \fIcommand\fR argument starts with a digit or \fB#\fR.
+defaulted if the first \fIcommand\fR argument is an integer or starts with \fB#\fR.
 .PP
 For example, suppose that procedure \fBa\fR was invoked
 from top-level, and that it called \fBb\fR, and that \fBb\fR called \fBc\fR.
diff --git a/doc/while.n b/doc/while.n
index 961260c..6acc909 100644
--- a/doc/while.n
+++ b/doc/while.n
@@ -63,3 +63,7 @@ set lineCount 0
 break(n), continue(n), for(n), foreach(n)
 .SH KEYWORDS
 boolean, loop, test, while
+'\" Local Variables:
+'\" mode: nroff
+'\" fill-column: 78
+'\" End:
diff --git a/doc/zipfs.3 b/doc/zipfs.3
new file mode 100644
index 0000000..8e2eacc
--- /dev/null
+++ b/doc/zipfs.3
@@ -0,0 +1,118 @@
+'\"
+'\" Copyright (c) 2015 Jan Nijtmans <jan.nijtmans@gmail.com>
+'\" Copyright (c) 2015 Christian Werner <chw@ch-werner.de>
+'\" Copyright (c) 2017 Sean Woods <yoda@etoyoc.com>
+'\"
+'\" See the file "license.terms" for information on usage and redistribution
+'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+'\"
+.TH Tclzipfs 3 8.7 Tcl "Tcl Library Procedures"
+.so man.macros
+.BS
+.SH NAME
+TclZipfs_AppHook, Tclzipfs_Mount, TclZipfs_MountBuffer, Tclzipfs_Unmount \- handle ZIP files as Tcl virtual filesystems
+.SH SYNOPSIS
+.nf
+int
+\fBTclZipfs_AppHook(\fIargcPtr, argvPtr\fR)
+.sp
+int
+\fBTclzipfs_Mount\fR(\fIinterp, mountpoint, zipname, password\fR)
+.sp
+int
+\fBTclZipfs_MountBuffer\fR(\fIinterp, mountpoint, data, dataLen, copy\fR)
+.sp
+int
+\fBTclzipfs_Unmount\fR(\fIinterp, mountpoint\fR)
+.fi
+.SH ARGUMENTS
+.AS Tcl_Interp *mountpoint in
+.AP "int" *argcPtr in
+Pointer to a variable holding the number of command line arguments from
+\fBmain\fR().
+.AP "char" ***argvPtr in
+Pointer to an array of strings containing the command line arguments to
+\fBmain\fR().
+.AP Tcl_Interp *interp in
+Interpreter in which the ZIP file system is mounted.  The interpreter's result is
+modified to hold the result or error message from the script.
+.AP "const char" *zipname in
+Name of a ZIP file. Must not be NULL when either mounting or unmounting a ZIP.
+.AP "const char" *mountpoint in
+Name of a mount point, which must be a legal Tcl file or directory name. May
+be NULL to query current mount points.
+.AP "const char" *password in
+An (optional) password. Use NULL if no password is wanted to read the file.
+.AP "unsigned char" *data in
+A data buffer to mount. The data buffer must hold the contents of a ZIP
+archive, and must not be NULL.
+.AP size_t dataLen in
+The number of bytes in the supplied data buffer argument, \fIdata\fR.
+.AP int copy in
+If non-zero, the ZIP archive in the data buffer will be internally copied
+before mounting, allowing the data buffer to be disposed once
+\fBTclZipfs_MountBuffer\fR returns. If zero, the caller guarantees that the
+buffer will be valid to read from for the duration of the mount.
+.BE
+.SH DESCRIPTION
+\fBTclZipfs_AppHook\fR is a utility function to perform standard application
+initialization procedures, taking into account available ZIP archives as
+follows:
+.IP [1]
+If the current application has a mountable ZIP archive, that archive is
+mounted under \fIZIPFS_VOLUME\fB/app\fR as a read-only Tcl virtual file
+system. \fIZIPFS_VOLUME\fR is usually \fB//zipfs:\fR on all platforms, but
+\fBzipfs:\fR may also be used on Windows (due to differences in the
+platform's filename parsing).
+.IP [2]
+If a file named \fBmain.tcl\fR is located in the root directory of that file
+system (i.e., at \fIZIPROOT\fB/app/main.tcl\fR after the ZIP archive is
+mounted as described above) it is treated as the startup script for the
+process.
+.IP [3]
+If the file \fIZIPROOT\fB/app/tcl_library/init.tcl\fR is present, the
+\fBtcl_library\fR global variable in the initial Tcl interpreter is set to
+\fIZIPROOT\fB/app/tcl_library\fR.
+.IP [4]
+If the directory \fBtcl_library\fR was not found in the main application
+mount, the system will then search for it as either a VFS attached to the
+application dynamic library, or as a zip archive named
+\fBlibtcl_\fImajor\fB_\fIminor\fB_\fIpatchlevel\fB.zip\fR either in the
+present working directory or in the standard Tcl install location. (For
+example, the Tcl 8.7.2 release would be searched for in a file
+\fBlibtcl_8_7_2.zip\fR.) That archive, if located, is also mounted read-only.
+.PP
+On Windows, \fBTclZipfs_AppHook\fR has a slightly different signature, since
+it uses WCHAR in stead of char. As a result, it requires your application to
+be compiled with the UNICODE preprocessor symbol defined (e.g., via the
+\fB-DUNICODE\fR compiler flag).
+.PP
+The result of \fBTclZipfs_AppHook\fR is a Tcl result code (e.g., \fBTCL_OK\fR
+when the function is successful). The function \fImay\fR modify the variables
+pointed to by \fIargcPtr\fR and \fIargvPtr\fR to remove arguments; the
+current implementation does not do so, but callers \fIshould not\fR assume
+that this will be true in the future.
+.PP
+\fBTclzipfs_Mount\fR mounts the ZIP archive \fIzipname\fR on the mount point
+given in \fImountpoint\fR using the optional ZIP password \fIpassword\fR.
+Errors during that process are reported in the interpreter \fIinterp\fR.  If
+\fImountpoint\fR is a NULL pointer, information on all currently mounted ZIP
+file systems is written into \fIinterp\fR's result as a sequence of mount
+points and ZIP file names.  The result of this call is a standard Tcl result
+code.
+.PP
+\fBTclzipfs_MountBuffer\fR mounts the ZIP archive in the buffer pointed to by
+\fIdata\fR on the mount point given in \fImountpoint\fR. The ZIP archive is
+assumed to be not password protected.  Errors during that process are reported
+in the interpreter \fIinterp\fR. The \fIcopy\fR argument determines whether
+the buffer is internally copied before mounting or not. The result of this
+call is a standard Tcl result code.
+.PP
+\fBTclzipfs_Unmount\fR undoes the effect of \fBTclzipfs_Mount\fR, i.e., it
+unmounts the mounted ZIP file system that was mounted from \fIzipname\fR (at
+\fImountpoint\fR). Errors are reported in the interpreter \fIinterp\fR.  The
+result of this call is a standard Tcl result code.
+.SH "SEE ALSO"
+zipfs(n)
+.SH KEYWORDS
+compress, filesystem, zip
diff --git a/doc/zipfs.n b/doc/zipfs.n
new file mode 100644
index 0000000..c27b5d5
--- /dev/null
+++ b/doc/zipfs.n
@@ -0,0 +1,255 @@
+'\"
+'\" Copyright (c) 2015 Jan Nijtmans <jan.nijtmans@gmail.com>
+'\" Copyright (c) 2015 Christian Werner <chw@ch-werner.de>
+'\" Copyright (c) 2015 Sean Woods <yoda@etoyoc.com>
+'\"
+'\" See the file "license.terms" for information on usage and redistribution
+'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+'\"
+.TH zipfs n 1.0 Zipfs "zipfs Commands"
+.so man.macros
+.BS
+'\" Note:  do not modify the .SH NAME line immediately below!
+.SH NAME
+zipfs \- Mount and work with ZIP files within Tcl
+.SH SYNOPSIS
+.nf
+\fBpackage require zipfs \fR?\fB1.0\fR?
+.sp
+\fBzipfs canonical\fR ?\fImntpnt\fR? \fIfilename\fR ?\fIZIPFS\fR?
+\fBzipfs exists\fR \fIfilename\fR
+\fBzipfs find\fR \fIdirectoryName\fR
+\fBzipfs info\fR \fIfilename\fR
+\fBzipfs list\fR ?(\fB\-glob\fR|\fB\-regexp\fR)? ?\fIpattern\fR?
+\fBzipfs lmkimg\fR \fIoutfile inlist\fR ?\fIpassword infile\fR?
+\fBzipfs lmkzip\fR \fIoutfile inlist\fR ?\fIpassword\fR?
+\fBzipfs mkimg\fR \fIoutfile indir\fR ?\fIstrip\fR? ?\fIpassword\fR? ?\fIinfile\fR?
+\fBzipfs mkkey\fR \fIpassword\fR
+\fBzipfs mkzip\fR \fIoutfile indir\fR ?\fIstrip\fR? ?\fIpassword\fR?
+\fBzipfs mount\fR ?\fImountpoint\fR? ?\fIzipfile\fR? ?\fIpassword\fR?
+\fBzipfs root\fR
+\fBzipfs unmount\fR \fImountpoint\fR
+.fi
+'\" The following subcommand is *UNDOCUMENTED*
+'\" \fBzipfs mount_data\fR ?\fImountpoint\fR? ?\fIdata\fR?
+.BE
+.SH DESCRIPTION
+.PP
+The \fBzipfs\fR command (the sole public command provided by the built-in
+package with the same name) provides Tcl with the ability to mount the
+contents of a ZIP archive file as a virtual file system. ZIP archives support
+simple encryption, sufficient to prevent casual inspection of their contents
+but not able to prevent access by even a moderately determined attacker.
+.TP
+\fBzipfs canonical\fR ?\fImountpoint\fR? \fIfilename\fR ?\fIinZipfs\fR?
+.
+This takes the name of a file, \fIfilename\fR, and produces where it would be
+mapped into a zipfs mount as its result. If specified, \fImountpoint\fR says
+within which mount the mapping will be done; if omitted, the main root of the
+zipfs system is used. The \fIinZipfs\fR argument is a an optional boolean
+which controls whether to fully canonicalise the name; it defaults to true.
+.TP
+\fBzipfs exists\fR \fIfilename\fR
+.
+Return 1 if the given filename exists in the mounted zipfs and 0 if it does not.
+.TP
+\fBzipfs find\fR \fIdirectoryName\fR
+.
+Recursively lists files including and below the directory \fIdirectoryName\fR.
+The result list consists of relative path names starting from the given
+directory. This command is also used by the \fBzipfs mkzip\fR and \fBzipfs
+mkimg\fR commands.
+.TP
+\fBzipfs info\fR \fIfile\fR
+.
+Return information about the given \fIfile\fR in the mounted zipfs.  The
+information consists of:
+.RS
+.IP (1)
+the name of the ZIP archive file that contains the file,
+.IP (2)
+the size of the file after decompressions,
+.IP (3)
+the compressed size of the file, and
+.IP (4)
+the offset of the compressed data in the ZIP archive file.
+.PP
+Note: querying the mount point gives the start of the zip data as the offset
+in (4), which can be used to truncate the zip information from an executable.
+.RE
+.TP
+\fBzipfs list\fR ?(\fB\-glob\fR|\fB\-regexp\fR)? ?\fIpattern\fR?
+.
+Return a list of all files in the mounted zipfs, or just those matching
+\fIpattern\fR (optionally controlled by the option parameters).  The order of
+the names in the list is arbitrary.
+.TP
+\fBzipfs mount ?\fImountpoint\fR? ?\fIzipfile\fR? ?\fIpassword\fR?
+.
+The \fBzipfs mount\fR command mounts a ZIP archive file as a Tcl virtual
+filesystem at \fImountpoint\fR.  After this command executes, files contained
+in \fIzipfile\fR will appear to Tcl to be regular files at the mount point.
+.RS
+.PP
+With no \fIzipfile\fR, returns the zipfile mounted at \fImountpoint\fR.  With
+no \fImountpoint\fR, return all zipfile/mount pairs.  If \fImountpoint\fR is
+specified as an empty string, mount on file path.
+.PP
+\fBNB:\fR because the current working directory is a concept maintained by the
+operating system, using \fBcd\fR into a mounted archive will only work in the
+current process, and then not entirely consistently (e.g., if a shared library
+uses direct access to the OS rather than through Tcl's filesystem API, it will
+not see the current directory as being inside the mount and will not be able
+to access the files inside the mount).
+.RE
+.TP
+\fBzipfs root\fR
+.
+Returns a constant string which indicates the mount point for zipfs volumes
+for the current platform. On Windows, this value is
+.QW \fBzipfs:/\fR .
+On Unix, this value is
+.QW \fB//zipfs:/\fR .
+.RE
+.TP
+\fBzipfs unmount \fImountpoint\fR
+.
+Unmounts a previously mounted ZIP archive mounted to \fImountpoint\fR.
+.SS "ZIP CREATION COMMANDS"
+This package also provides several commands to aid the creation of ZIP
+archives as Tcl applications.
+.TP
+\fBzipfs mkzip\fR \fIoutfile indir\fR ?\fIstrip\fR? ?\fIpassword\fR?
+.
+Creates a ZIP archive file named \fIoutfile\fR from the contents of the input
+directory \fIindir\fR (contained regular files only) with optional ZIP
+password \fIpassword\fR. While processing the files below \fIindir\fR the
+optional file name prefix given in \fIstrip\fR is stripped off the beginning
+of the respective file name.  When stripping, it is common to remove either
+the whole source directory name or the name of its parent directory.
+.RS
+.PP
+\fBCaution:\fR the choice of the \fIindir\fR parameter (less the optional
+stripped prefix) determines the later root name of the archive's content.
+.RE
+.TP
+\fBzipfs mkimg\fR \fIoutfile indir\fR ?\fIstrip\fR? ?\fIpassword\fR? ?\fIinfile\fR?
+.
+Creates an image (potentially a new executable file) similar to \fBzipfs
+mkzip\fR; see that command for a description of most parameters to this
+command, as they behave identically here.
+.RS
+.PP
+If the \fIinfile\fR parameter is specified, this file is prepended in front of
+the ZIP archive, otherwise the file returned by \fBinfo nameofexecutable\fR
+(i.e., the executable file of the running process) is used. If the
+\fIpassword\fR parameter is not empty, an obfuscated version of that password
+(see \fBzipfs mkkey\fR) is placed between the image and ZIP chunks of the
+output file and the contents of the ZIP chunk are protected with that
+password.
+.PP
+If there is a file, \fBmain.tcl\fR, in the root directory of the resulting
+archive and the image file that the archive is attached to is a \fBtclsh\fR
+(or \fBwish\fR) instance (true by default, but depends on your configuration),
+then the resulting image is an executable that will \fBsource\fR the script in
+that \fBmain.tcl\fR after mounting the ZIP archive, and will \fBexit\fR once
+that script has been executed.
+.PP
+\fBCaution:\fR highly experimental, not usable on Android, only partially
+tested on Linux and Windows.
+.RE
+.TP
+\fBzipfs mkkey\fR \fIpassword\fR
+.
+Given the clear text \fIpassword\fR argument, an obfuscated string version is
+returned with the same format used in the \fBzipfs mkimg\fR command.
+.TP
+\fBzipfs lmkimg\fR \fIoutfile inlist\fR ?\fIpassword infile\fR?
+.
+This command is like \fBzipfs mkimg\fR, but instead of an input directory,
+\fIinlist\fR must be a Tcl list where the odd elements are the names of files
+to be copied into the archive in the image, and the even elements are their
+respective names within that archive.
+.TP
+\fBzipfs lmkzip\fR \fIoutfile inlist\fR ?\fIpassword\fR?
+.
+This command is like \fBzipfs mkzip\fR, but instead of an input directory,
+\fIinlist\fR must be a Tcl list where the odd elements are the names of files
+to be copied into the archive, and the even elements are their respective
+names within that archive.
+.SH "EXAMPLES"
+.PP
+Mounting an ZIP archive as an application directory and running code out of it
+before unmounting it again:
+.PP
+.CS
+set zip myApp.zip
+set base [file join [\fbzipfs root\fR] myApp]
+
+\fBzipfs mount\fR $base $zip
+# $base now has the contents of myApp.zip
+
+source [file join $base app.tcl]
+# use the contents, load libraries from it, etc...
+
+\fBzipfs unmount\fR $zip
+.CE
+.PP
+Creating a ZIP archive, given that a directory exists containing the content
+to put in the archive. Note that the source directory is given twice, in order
+to strip the exterior directory name from each filename in the archive.
+.PP
+.CS
+set sourceDirectory [file normalize myApp]
+set targetZip myApp.zip
+
+\fBzipfs mkzip\fR $targetZip $sourceDirectory $sourceDirectory
+.CE
+.PP
+Encryption can be applied to ZIP archives by providing a password when
+building the ZIP and when mounting it.
+.PP
+.CS
+set zip myApp.zip
+set sourceDir [file normalize myApp]
+set password "hunter2"
+set base [file join [\fbzipfs root\fR] myApp]
+
+# Create with password
+\fBzipfs mkzip\fR $targetZip $sourceDir $sourceDir $password
+
+# Mount with password
+\fBzipfs mount\fR $base $zip $password
+.CE
+.PP
+When creating an executable image with a password, the password is placed
+within the executable in a shrouded form so that the application can read
+files inside the embedded ZIP archive yet casual inspection cannot read it.
+.PP
+.CS
+set appDir [file normalize myApp]
+set img "myApp.bin"
+set password "hunter2"
+
+# Create some simple content to define a basic application
+file mkdir $appDir
+set f [open $appDir/main.tcl]
+puts $f {
+    puts "Hi. This is [info script]"
+}
+close $f
+
+# Create the executable
+\fBzipfs mkimg\fR $img $appDir $appDir $password
+
+# Launch the executable, printing its output to stdout
+exec $img >@stdout
+#    prints: \fIHi. This is //zipfs:/app/main.tcl\fR
+.CE
+.SH "SEE ALSO"
+tclsh(1), file(n), zipfs(3), zlib(n)
+.SH "KEYWORDS"
+compress, filesystem, zip
+'\" Local Variables:
+'\" mode: nroff
+'\" End:
diff --git a/generic/tcl.decls b/generic/tcl.decls
index f5b0945..dfcb822 100644
--- a/generic/tcl.decls
+++ b/generic/tcl.decls
@@ -2330,9 +2330,23 @@ declare 631 {
 	    ClientData callbackData)
 }
 
-# ----- BASELINE -- FOR -- 8.7.0 ----- #
-
+# TIP #430
+declare 632 {
+    int TclZipfs_Mount(Tcl_Interp *interp, const char *mountPoint,
+	    const char *zipname, const char *passwd)
+}
+declare 633 {
+    int TclZipfs_Unmount(Tcl_Interp *interp, const char *mountPoint)
+}
+declare 634 {
+    Tcl_Obj *TclZipfs_TclLibrary(void)
+}
+declare 635 {
+    int TclZipfs_MountBuffer(Tcl_Interp *interp, const char *mountPoint,
+	    unsigned char *data, size_t datalen, int copy)
+}
 
+# ----- BASELINE -- FOR -- 8.7.0 ----- #
 
 ##############################################################################
 
diff --git a/generic/tcl.h b/generic/tcl.h
index b44b9c3..0971066 100644
--- a/generic/tcl.h
+++ b/generic/tcl.h
@@ -224,7 +224,7 @@ extern "C" {
  * to be included in a shared library, then it should have the DLLEXPORT
  * storage class. If is being declared for use by a module that is going to
  * link against the shared library, then it should have the DLLIMPORT storage
- * class. If the symbol is beind declared for a static build or for use from a
+ * class. If the symbol is being declared for a static build or for use from a
  * stub library, then the storage class should be empty.
  *
  * The convention is that a macro called BUILD_xxxx, where xxxx is the name of
@@ -2334,6 +2334,13 @@ typedef int (Tcl_ArgvGenFuncProc)(ClientData clientData, Tcl_Interp *interp,
 #define TCL_TCPSERVER_REUSEPORT (1<<1)
 
 /*
+ * Constants for special int-typed values, see TIP #494
+ */
+
+#define TCL_IO_FAILURE	(-1)
+#define TCL_AUTO_LENGTH	(-1)
+
+/*
  *----------------------------------------------------------------------------
  * Single public declaration for NRE.
  */
@@ -2402,6 +2409,9 @@ EXTERN void		Tcl_MainEx(int argc, char **argv,
 EXTERN const char *	Tcl_PkgInitStubsCheck(Tcl_Interp *interp,
 			    const char *version, int exact);
 EXTERN void		Tcl_GetMemoryInfo(Tcl_DString *dsPtr);
+#ifndef _WIN32
+EXTERN int		TclZipfs_AppHook(int *argc, char ***argv);
+#endif
 
 /*
  *----------------------------------------------------------------------------
diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index 71a1442..179306d 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -71,7 +71,18 @@ typedef struct {
 } CancelInfo;
 static Tcl_HashTable cancelTable;
 static int cancelTableInitialized = 0;	/* 0 means not yet initialized. */
-TCL_DECLARE_MUTEX(cancelLock)
+TCL_DECLARE_MUTEX(cancelLock);
+
+/*
+ * Table used to map command implementation functions to a human-readable type
+ * name, for [info type]. The keys in the table are function addresses, and
+ * the values in the table are static char* containing strings in Tcl's
+ * internal encoding (almost UTF-8).
+ */
+
+static Tcl_HashTable commandTypeTable;
+static int commandTypeInit = 0;
+TCL_DECLARE_MUTEX(commandTypeLock);
 
 /*
  * Declarations for managing contexts for non-recursive coroutines. Contexts
@@ -94,6 +105,7 @@ TCL_DECLARE_MUTEX(cancelLock)
  * Static functions in this file:
  */
 
+static Tcl_ObjCmdProc   BadEnsembleSubcommand;
 static char *		CallCommandTraces(Interp *iPtr, Command *cmdPtr,
 			    const char *oldName, const char *newName,
 			    int flags);
@@ -114,7 +126,6 @@ static Tcl_ObjCmdProc	ExprBinaryFunc;
 static Tcl_ObjCmdProc	ExprBoolFunc;
 static Tcl_ObjCmdProc	ExprCeilFunc;
 static Tcl_ObjCmdProc	ExprDoubleFunc;
-static Tcl_ObjCmdProc	ExprEntierFunc;
 static Tcl_ObjCmdProc	ExprFloorFunc;
 static Tcl_ObjCmdProc	ExprIntFunc;
 static Tcl_ObjCmdProc	ExprIsqrtFunc;
@@ -196,6 +207,24 @@ typedef struct {
  * it for it. Defined in tclInt.h. */
 
 /*
+ * The following struct states that the command it talks about (a subcommand
+ * of one of Tcl's built-in ensembles) is unsafe and must be hidden when an
+ * interpreter is made safe. (TclHideUnsafeCommands accesses an array of these
+ * structs.) Alas, we can't sensibly just store the information directly in
+ * the commands.
+ */
+
+typedef struct {
+    const char *ensembleNsName; /* The ensemble's name within ::tcl. NULL for
+                                 * the end of the list of commands to hide. */
+    const char *commandName;    /* The name of the command within the
+                                 * ensemble. If this is NULL, we want to also
+                                 * make the overall command be hidden, an ugly
+                                 * hack because it is expected by security
+                                 * policies in the wild. */
+} UnsafeEnsembleInfo;
+
+/*
  * The built-in commands, and the functions that implement them:
  */
 
@@ -296,6 +325,68 @@ static const CmdInfo builtInCmds[] = {
 };
 
 /*
+ * Information about which pieces of ensembles to hide when making an
+ * interpreter safe:
+ */
+
+static const UnsafeEnsembleInfo unsafeEnsembleCommands[] = {
+    /* [encoding] has two unsafe commands. Assumed by older security policies
+     * to be overall unsafe; it isn't but... */
+    {"encoding", NULL},
+    {"encoding", "dirs"},
+    {"encoding", "system"},
+    /* [file] has MANY unsafe commands! Assumed by older security policies to
+     * be overall unsafe; it isn't but... */
+    {"file", NULL},
+    {"file", "atime"},
+    {"file", "attributes"},
+    {"file", "copy"},
+    {"file", "delete"},
+    {"file", "dirname"},
+    {"file", "executable"},
+    {"file", "exists"},
+    {"file", "extension"},
+    {"file", "isdirectory"},
+    {"file", "isfile"},
+    {"file", "link"},
+    {"file", "lstat"},
+    {"file", "mtime"},
+    {"file", "mkdir"},
+    {"file", "nativename"},
+    {"file", "normalize"},
+    {"file", "owned"},
+    {"file", "readable"},
+    {"file", "readlink"},
+    {"file", "rename"},
+    {"file", "rootname"},
+    {"file", "size"},
+    {"file", "stat"},
+    {"file", "tail"},
+    {"file", "tempfile"},
+    {"file", "type"},
+    {"file", "volumes"},
+    {"file", "writable"},
+    /* [info] has two unsafe commands */
+    {"info", "cmdtype"},
+    {"info", "nameofexecutable"},
+    /* [tcl::process] has ONLY unsafe commands! */
+    {"process", "list"},
+    {"process", "status"},
+    {"process", "purge"},
+    {"process", "autopurge"},
+    /* [zipfs] has MANY unsafe commands! */
+    {"zipfs", "lmkimg"},
+    {"zipfs", "lmkzip"},
+    {"zipfs", "mkimg"},
+    {"zipfs", "mkkey"},
+    {"zipfs", "mkzip"},
+    {"zipfs", "mount"},
+    {"zipfs", "mount_data"},
+    {"zipfs", "unmount"},
+    {NULL, NULL}
+};
+
+/*
  * Math functions. All are safe.
  */
 
@@ -316,7 +407,7 @@ static const BuiltinFuncDef BuiltinFuncTable[] = {
     { "cos",	ExprUnaryFunc,	(ClientData) cos	},
     { "cosh",	ExprUnaryFunc,	(ClientData) cosh	},
     { "double",	ExprDoubleFunc,	NULL			},
-    { "entier",	ExprEntierFunc,	NULL			},
+    { "entier",	ExprIntFunc,	NULL			},
     { "exp",	ExprUnaryFunc,	(ClientData) exp	},
     { "floor",	ExprFloorFunc,	NULL			},
     { "fmod",	ExprBinaryFunc,	(ClientData) fmod	},
@@ -431,6 +522,13 @@ TclFinalizeEvaluation(void)
 	cancelTableInitialized = 0;
     }
     Tcl_MutexUnlock(&cancelLock);
+
+    Tcl_MutexLock(&commandTypeLock);
+    if (commandTypeInit) {
+        Tcl_DeleteHashTable(&commandTypeTable);
+        commandTypeInit = 0;
+    }
+    Tcl_MutexUnlock(&commandTypeLock);
 }
 
 /*
@@ -504,9 +602,23 @@ Tcl_CreateInterp(void)
 	    Tcl_InitHashTable(&cancelTable, TCL_ONE_WORD_KEYS);
 	    cancelTableInitialized = 1;
 	}
+
 	Tcl_MutexUnlock(&cancelLock);
     }
 
+    if (commandTypeInit == 0) {
+        TclRegisterCommandTypeName(TclObjInterpProc, "proc");
+        TclRegisterCommandTypeName(TclEnsembleImplementationCmd, "ensemble");
+        TclRegisterCommandTypeName(TclAliasObjCmd, "alias");
+        TclRegisterCommandTypeName(TclLocalAliasObjCmd, "alias");
+        TclRegisterCommandTypeName(TclSlaveObjCmd, "slave");
+        TclRegisterCommandTypeName(TclInvokeImportedCmd, "import");
+        TclRegisterCommandTypeName(TclOOPublicObjectCmd, "object");
+        TclRegisterCommandTypeName(TclOOPrivateObjectCmd, "privateObject");
+        TclRegisterCommandTypeName(TclOOMyClassObjCmd, "privateClass");
+        TclRegisterCommandTypeName(TclNRInterpCoroutine, "coroutine");
+    }
+
     /*
      * Initialize support for namespaces and create the global namespace
      * (whose name is ""; an alias is "::"). This also initializes the Tcl
@@ -999,6 +1111,9 @@ Tcl_CreateInterp(void)
     if (TclZlibInit(interp) != TCL_OK) {
 	Tcl_Panic("%s", TclGetString(Tcl_GetObjResult(interp)));
     }
+    if (TclZipfs_Init(interp) != TCL_OK) {
+	Tcl_Panic("%s", Tcl_GetString(Tcl_GetObjResult(interp)));
+    }
 #endif
 
     TOP_CB(iPtr) = NULL;
@@ -1015,6 +1130,71 @@ DeleteOpCmdClientData(
 }
 
 /*
+ * ---------------------------------------------------------------------
+ *
+ * TclRegisterCommandTypeName, TclGetCommandTypeName --
+ *
+ *      Command type registration and lookup mechanism. Everything is keyed by
+ *      the Tcl_ObjCmdProc for the command, and that is used as the *key* into
+ *      the hash table that maps to constant strings that are names. (It is
+ *      recommended that those names be ASCII.)
+ *
+ * ---------------------------------------------------------------------
+ */
+
+void
+TclRegisterCommandTypeName(
+    Tcl_ObjCmdProc *implementationProc,
+    const char *nameStr)
+{
+    Tcl_HashEntry *hPtr;
+
+    Tcl_MutexLock(&commandTypeLock);
+    if (commandTypeInit == 0) {
+        Tcl_InitHashTable(&commandTypeTable, TCL_ONE_WORD_KEYS);
+        commandTypeInit = 1;
+    }
+    if (nameStr != NULL) {
+        int isNew;
+
+        hPtr = Tcl_CreateHashEntry(&commandTypeTable,
+                (void *) implementationProc, &isNew);
+        Tcl_SetHashValue(hPtr, (void *) nameStr);
+    } else {
+        hPtr = Tcl_FindHashEntry(&commandTypeTable,
+                (void *) implementationProc);
+        if (hPtr != NULL) {
+            Tcl_DeleteHashEntry(hPtr);
+        }
+    }
+    Tcl_MutexUnlock(&commandTypeLock);
+}
+
+const char *
+TclGetCommandTypeName(
+    Tcl_Command command)
+{
+    Command *cmdPtr = (Command *) command;
+    void *procPtr = cmdPtr->objProc;
+    const char *name = "native";
+
+    if (procPtr == NULL) {
+        procPtr = cmdPtr->nreProc;
+    }
+    Tcl_MutexLock(&commandTypeLock);
+    if (commandTypeInit) {
+        Tcl_HashEntry *hPtr = Tcl_FindHashEntry(&commandTypeTable, procPtr);
+
+        if (hPtr && Tcl_GetHashValue(hPtr)) {
+            name = (const char *) Tcl_GetHashValue(hPtr);
+        }
+    }
+    Tcl_MutexUnlock(&commandTypeLock);
+
+    return name;
+}
+
+/*
  *----------------------------------------------------------------------
  *
  * TclHideUnsafeCommands --
@@ -1035,6 +1215,7 @@ TclHideUnsafeCommands(
     Tcl_Interp *interp)		/* Hide commands in this interpreter. */
 {
     register const CmdInfo *cmdInfoPtr;
+    register const UnsafeEnsembleInfo *unsafePtr;
 
     if (interp == NULL) {
 	return TCL_ERROR;
@@ -1044,12 +1225,83 @@ TclHideUnsafeCommands(
 	    Tcl_HideCommand(interp, cmdInfoPtr->name, cmdInfoPtr->name);
 	}
     }
-    TclMakeEncodingCommandSafe(interp); /* Ugh! */
-    TclMakeFileCommandSafe(interp);     /* Ugh! */
+
+    for (unsafePtr = unsafeEnsembleCommands;
+            unsafePtr->ensembleNsName; unsafePtr++) {
+        if (unsafePtr->commandName) {
+            /*
+             * Hide an ensemble subcommand.
+             */
+
+            Tcl_Obj *cmdName = Tcl_ObjPrintf("::tcl::%s::%s",
+                    unsafePtr->ensembleNsName, unsafePtr->commandName);
+            Tcl_Obj *hideName = Tcl_ObjPrintf("tcl:%s:%s",
+                    unsafePtr->ensembleNsName, unsafePtr->commandName);
+
+            if (TclRenameCommand(interp, TclGetString(cmdName),
+                        "___tmp") != TCL_OK
+                    || Tcl_HideCommand(interp, "___tmp",
+                            TclGetString(hideName)) != TCL_OK) {
+                Tcl_Panic("problem making '%s %s' safe: %s",
+                        unsafePtr->ensembleNsName, unsafePtr->commandName,
+                        Tcl_GetString(Tcl_GetObjResult(interp)));
+            }
+            Tcl_CreateObjCommand(interp, TclGetString(cmdName),
+                    BadEnsembleSubcommand, (ClientData) unsafePtr, NULL);
+            TclDecrRefCount(cmdName);
+            TclDecrRefCount(hideName);
+        } else {
+            /*
+             * Hide an ensemble main command (for compatibility).
+             */
+
+            if (Tcl_HideCommand(interp, unsafePtr->ensembleNsName,
+                    unsafePtr->ensembleNsName) != TCL_OK) {
+                Tcl_Panic("problem making '%s' safe: %s",
+                        unsafePtr->ensembleNsName,
+                        Tcl_GetString(Tcl_GetObjResult(interp)));
+            }
+        }
+    }
+
     return TCL_OK;
 }
 
 /*
+ *----------------------------------------------------------------------
+ *
+ * BadEnsembleSubcommand --
+ *
+ *	Command used to act as a backstop implementation when subcommands of
+ *	ensembles are unsafe (the real implementations of the subcommands are
+ *	hidden). The clientData is description of what was hidden.
+ *
+ * Results:
+ *	A standard Tcl result (always a TCL_ERROR).
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+BadEnsembleSubcommand(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const objv[])
+{
+    const UnsafeEnsembleInfo *infoPtr = clientData;
+
+    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+            "not allowed to invoke subcommand %s of %s",
+            infoPtr->commandName, infoPtr->ensembleNsName));
+    Tcl_SetErrorCode(interp, "TCL", "SAFE", "SUBCOMMAND", NULL);
+    return TCL_ERROR;
+}
+
+/*
  *--------------------------------------------------------------
  *
  * Tcl_CallWhenDeleted --
@@ -6520,7 +6772,7 @@ Tcl_ExprLongObj(
 	resultPtr = Tcl_NewBignumObj(&big);
 	/* FALLTHROUGH */
     }
-    case TCL_NUMBER_WIDE:
+    case TCL_NUMBER_INT:
     case TCL_NUMBER_BIG:
 	result = TclGetLongFromObj(interp, resultPtr, ptr);
 	break;
@@ -7496,7 +7748,7 @@ ExprAbsFunc(
 	return TCL_ERROR;
     }
 
-    if (type == TCL_NUMBER_WIDE) {
+    if (type == TCL_NUMBER_INT) {
 	Tcl_WideInt l = *((const Tcl_WideInt *) ptr);
 
 	if (l > (Tcl_WideInt)0) {
@@ -7513,7 +7765,7 @@ ExprAbsFunc(
 		}
 	    }
 	    goto unChanged;
-	} else if (l == LLONG_MIN) {
+	} else if (l == WIDE_MIN) {
 	    TclInitBignumFromWideInt(&big, l);
 	    goto tooLarge;
 	}
@@ -7617,7 +7869,7 @@ ExprDoubleFunc(
 }
 
 static int
-ExprEntierFunc(
+ExprIntFunc(
     ClientData clientData,	/* Ignored. */
     Tcl_Interp *interp,		/* The interpreter in which to execute the
 				 * function. */
@@ -7638,7 +7890,7 @@ ExprEntierFunc(
 
     if (type == TCL_NUMBER_DOUBLE) {
 	d = *((const double *) ptr);
-	if ((d >= (double)LLONG_MAX) || (d <= (double)LLONG_MIN)) {
+	if ((d >= (double)WIDE_MAX) || (d <= (double)WIDE_MIN)) {
 	    mp_int big;
 
 	    if (Tcl_InitBignumFromDouble(interp, d, &big) != TCL_OK) {
@@ -7673,25 +7925,6 @@ ExprEntierFunc(
 }
 
 static int
-ExprIntFunc(
-    ClientData clientData,	/* Ignored. */
-    Tcl_Interp *interp,		/* The interpreter in which to execute the
-				 * function. */
-    int objc,			/* Actual parameter count. */
-    Tcl_Obj *const *objv)	/* Actual parameter vector. */
-{
-    Tcl_WideInt wResult;
-    Tcl_Obj *objPtr;
-    if (ExprEntierFunc(NULL, interp, objc, objv) != TCL_OK) {
-	return TCL_ERROR;
-    }
-    objPtr = Tcl_GetObjResult(interp);
-    TclGetWideBitsFromObj(NULL, objPtr, &wResult);
-    Tcl_SetObjResult(interp, Tcl_NewLongObj((long)wResult));
-    return TCL_OK;
-}
-
-static int
 ExprWideFunc(
     ClientData clientData,	/* Ignored. */
     Tcl_Interp *interp,		/* The interpreter in which to execute the
@@ -7701,7 +7934,7 @@ ExprWideFunc(
 {
     Tcl_WideInt wResult;
 
-    if (ExprEntierFunc(NULL, interp, objc, objv) != TCL_OK) {
+    if (ExprIntFunc(NULL, interp, objc, objv) != TCL_OK) {
 	return TCL_ERROR;
     }
     TclGetWideBitsFromObj(NULL, Tcl_GetObjResult(interp), &wResult);
diff --git a/generic/tclBinary.c b/generic/tclBinary.c
index 24f228e..fdc60e7 100644
--- a/generic/tclBinary.c
+++ b/generic/tclBinary.c
@@ -2483,8 +2483,8 @@ BinaryDecodeHex(
 	    }
 
 	    c = *data++;
-	    if (!isxdigit((int) c)) {
-		if (strict || !isspace(c)) {
+	    if (!isxdigit(UCHAR(c))) {
+		if (strict || !TclIsSpaceProc(c)) {
 		    goto badChar;
 		}
 		i--;
@@ -2831,7 +2831,7 @@ BinaryDecodeUu(
 	if (lineLen < 0) {
 	    c = *data++;
 	    if (c < 32 || c > 96) {
-		if (strict || !isspace(c)) {
+		if (strict || !TclIsSpaceProc(c)) {
 		    goto badUu;
 		}
 		i--;
@@ -2849,7 +2849,7 @@ BinaryDecodeUu(
 		d[i] = c = *data++;
 		if (c < 32 || c > 96) {
 		    if (strict) {
-			if (!isspace(c)) {
+			if (!TclIsSpaceProc(c)) {
 			    goto badUu;
 			} else if (c == '\n') {
 			    goto shortUu;
@@ -2893,7 +2893,7 @@ BinaryDecodeUu(
 		} else if (c >= 32 && c <= 96) {
 		    data--;
 		    break;
-		} else if (strict || !isspace(c)) {
+		} else if (strict || !TclIsSpaceProc(c)) {
 		    goto badUu;
 		}
 	    } while (data < dataend);
@@ -3018,7 +3018,7 @@ BinaryDecode64(
 		if (c == '=' && i > 1) {
 		     value <<= 6;
 		     cut++;
-		} else if (!strict && isspace(c)) {
+		} else if (!strict && TclIsSpaceProc(c)) {
 		     i--;
 		} else {
 		    goto bad64;
@@ -3036,7 +3036,7 @@ BinaryDecode64(
 	    } else if (c == '=') {
 		value <<= 6;
 		cut++;
-	    } else if (strict || !isspace(c)) {
+	    } else if (strict || !TclIsSpaceProc(c)) {
 		goto bad64;
 	    } else {
 		i--;
@@ -3057,7 +3057,7 @@ BinaryDecode64(
 		goto bad64;
 	    }
 	    for (; data < dataend; data++) {
-		if (!isspace(*data)) {
+		if (!TclIsSpaceProc(*data)) {
 		    goto bad64;
 		}
 	    }
diff --git a/generic/tclCmdAH.c b/generic/tclCmdAH.c
index 94cb8aa..334121f 100644
--- a/generic/tclCmdAH.c
+++ b/generic/tclCmdAH.c
@@ -46,9 +46,6 @@ struct ForeachState {
 
 static int		CheckAccess(Tcl_Interp *interp, Tcl_Obj *pathPtr,
 			    int mode);
-static int		BadEncodingSubcommand(ClientData dummy,
-			    Tcl_Interp *interp, int objc,
-			    Tcl_Obj *const objv[]);
 static int		EncodingConvertfromObjCmd(ClientData dummy,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const objv[]);
@@ -84,7 +81,6 @@ static Tcl_NRPostProc	ForPostNextCallback;
 static Tcl_NRPostProc	ForeachLoopStep;
 static Tcl_NRPostProc	EvalCmdErrMsg;
 
-static Tcl_ObjCmdProc	BadFileSubcommand;
 static Tcl_ObjCmdProc FileAttrAccessTimeCmd;
 static Tcl_ObjCmdProc FileAttrIsDirectoryCmd;
 static Tcl_ObjCmdProc FileAttrIsExecutableCmd;
@@ -536,9 +532,9 @@ TclInitEncodingCmd(
     static const EnsembleImplMap encodingImplMap[] = {
 	{"convertfrom", EncodingConvertfromObjCmd, TclCompileBasic1Or2ArgCmd, NULL, NULL, 0},
 	{"convertto",   EncodingConverttoObjCmd,   TclCompileBasic1Or2ArgCmd, NULL, NULL, 0},
-	{"dirs",        EncodingDirsObjCmd,        TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
+	{"dirs",        EncodingDirsObjCmd,        TclCompileBasic0Or1ArgCmd, NULL, NULL, 1},
 	{"names",       EncodingNamesObjCmd,       TclCompileBasic0ArgCmd,    NULL, NULL, 0},
-	{"system",      EncodingSystemObjCmd,      TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
+	{"system",      EncodingSystemObjCmd,      TclCompileBasic0Or1ArgCmd, NULL, NULL, 1},
 	{NULL,          NULL,                      NULL,                      NULL, NULL, 0}
     };
 
@@ -546,113 +542,6 @@ TclInitEncodingCmd(
 }
 
 /*
- *-----------------------------------------------------------------------------
- *
- * TclMakeEncodingCommandSafe --
- *
- *	This function hides the unsafe 'dirs' and 'system' subcommands of
- *	the "encoding" Tcl command ensemble. It must be called only from
- *	TclHideUnsafeCommands.
- *
- * Results:
- *	A standard Tcl result
- *
- * Side effects:
- *	Adds commands to the table of hidden commands.
- *
- *-----------------------------------------------------------------------------
- */
-
-int
-TclMakeEncodingCommandSafe(
-    Tcl_Interp* interp)		/* Tcl interpreter */
-{
-    static const struct {
-	const char *cmdName;
-	int unsafe;
-    } unsafeInfo[] = {
-	{"convertfrom", 0},
-	{"convertto",   0},
-	{"dirs",        1},
-	{"names",       0},
-	{"system",      0},
-	{NULL,          0}
-    };
-
-    int i;
-    Tcl_DString oldBuf, newBuf;
-
-    Tcl_DStringInit(&oldBuf);
-    TclDStringAppendLiteral(&oldBuf, "::tcl::encoding::");
-    Tcl_DStringInit(&newBuf);
-    TclDStringAppendLiteral(&newBuf, "tcl:encoding:");
-    for (i=0 ; unsafeInfo[i].cmdName != NULL ; i++) {
-	if (unsafeInfo[i].unsafe) {
-	    const char *oldName, *newName;
-
-	    Tcl_DStringSetLength(&oldBuf, 17);
-	    oldName = Tcl_DStringAppend(&oldBuf, unsafeInfo[i].cmdName, -1);
-	    Tcl_DStringSetLength(&newBuf, 13);
-	    newName = Tcl_DStringAppend(&newBuf, unsafeInfo[i].cmdName, -1);
-	    if (TclRenameCommand(interp, oldName, "___tmp") != TCL_OK
-		    || Tcl_HideCommand(interp, "___tmp", newName) != TCL_OK) {
-		Tcl_Panic("problem making 'encoding %s' safe: %s",
-			unsafeInfo[i].cmdName,
-			Tcl_GetString(Tcl_GetObjResult(interp)));
-	    }
-	    Tcl_CreateObjCommand(interp, oldName, BadEncodingSubcommand,
-		    (ClientData) unsafeInfo[i].cmdName, NULL);
-	}
-    }
-    Tcl_DStringFree(&oldBuf);
-    Tcl_DStringFree(&newBuf);
-
-    /*
-     * Ugh. The [encoding] command is now actually safe, but it is assumed by
-     * scripts that it is not, which messes up security policies.
-     */
-
-    if (Tcl_HideCommand(interp, "encoding", "encoding") != TCL_OK) {
-	Tcl_Panic("problem making 'encoding' safe: %s",
-		Tcl_GetString(Tcl_GetObjResult(interp)));
-    }
-    return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * BadEncodingSubcommand --
- *
- *	Command used to act as a backstop implementation when subcommands of
- *	"encoding" are unsafe (the real implementations of the subcommands are
- *	hidden). The clientData is always the full official subcommand name.
- *
- * Results:
- *	A standard Tcl result (always a TCL_ERROR).
- *
- * Side effects:
- *	None.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-BadEncodingSubcommand(
-    ClientData clientData,
-    Tcl_Interp *interp,
-    int objc,
-    Tcl_Obj *const objv[])
-{
-    const char *subcommandName = (const char *) clientData;
-
-    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
-	    "not allowed to invoke subcommand %s of encoding", subcommandName));
-    Tcl_SetErrorCode(interp, "TCL", "SAFE", "SUBCOMMAND", NULL);
-    return TCL_ERROR;
-}
-
-/*
  *----------------------------------------------------------------------
  *
  * EncodingConvertfromObjCmd --
@@ -1174,40 +1063,40 @@ TclInitFileCmd(
      */
 
     static const EnsembleImplMap initMap[] = {
-	{"atime",	FileAttrAccessTimeCmd,	TclCompileBasic1Or2ArgCmd, NULL, NULL, 0},
-	{"attributes",	TclFileAttrsCmd,	NULL, NULL, NULL, 0},
+	{"atime",	FileAttrAccessTimeCmd,	TclCompileBasic1Or2ArgCmd, NULL, NULL, 1},
+	{"attributes",	TclFileAttrsCmd,	NULL, NULL, NULL, 1},
 	{"channels",	TclChannelNamesCmd,	TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
-	{"copy",	TclFileCopyCmd,		NULL, NULL, NULL, 0},
-	{"delete",	TclFileDeleteCmd,	TclCompileBasicMin0ArgCmd, NULL, NULL, 0},
-	{"dirname",	PathDirNameCmd,		TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"executable",	FileAttrIsExecutableCmd, TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"exists",	FileAttrIsExistingCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"extension",	PathExtensionCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"isdirectory",	FileAttrIsDirectoryCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"isfile",	FileAttrIsFileCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
+	{"copy",	TclFileCopyCmd,		NULL, NULL, NULL, 1},
+	{"delete",	TclFileDeleteCmd,	TclCompileBasicMin0ArgCmd, NULL, NULL, 1},
+	{"dirname",	PathDirNameCmd,		TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"executable",	FileAttrIsExecutableCmd, TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"exists",	FileAttrIsExistingCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"extension",	PathExtensionCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"isdirectory",	FileAttrIsDirectoryCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"isfile",	FileAttrIsFileCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
 	{"join",	PathJoinCmd,		TclCompileBasicMin1ArgCmd, NULL, NULL, 0},
-	{"link",	TclFileLinkCmd,		TclCompileBasic1To3ArgCmd, NULL, NULL, 0},
-	{"lstat",	FileAttrLinkStatCmd,	TclCompileBasic2ArgCmd, NULL, NULL, 0},
-	{"mtime",	FileAttrModifyTimeCmd,	TclCompileBasic1Or2ArgCmd, NULL, NULL, 0},
-	{"mkdir",	TclFileMakeDirsCmd,	TclCompileBasicMin0ArgCmd, NULL, NULL, 0},
-	{"nativename",	PathNativeNameCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"normalize",	PathNormalizeCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"owned",	FileAttrIsOwnedCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
+	{"link",	TclFileLinkCmd,		TclCompileBasic1To3ArgCmd, NULL, NULL, 1},
+	{"lstat",	FileAttrLinkStatCmd,	TclCompileBasic2ArgCmd, NULL, NULL, 1},
+	{"mtime",	FileAttrModifyTimeCmd,	TclCompileBasic1Or2ArgCmd, NULL, NULL, 1},
+	{"mkdir",	TclFileMakeDirsCmd,	TclCompileBasicMin0ArgCmd, NULL, NULL, 1},
+	{"nativename",	PathNativeNameCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"normalize",	PathNormalizeCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"owned",	FileAttrIsOwnedCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
 	{"pathtype",	PathTypeCmd,		TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"readable",	FileAttrIsReadableCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"readlink",	TclFileReadLinkCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"rename",	TclFileRenameCmd,	NULL, NULL, NULL, 0},
-	{"rootname",	PathRootNameCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
+	{"readable",	FileAttrIsReadableCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"readlink",	TclFileReadLinkCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"rename",	TclFileRenameCmd,	NULL, NULL, NULL, 1},
+	{"rootname",	PathRootNameCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
 	{"separator",	FilesystemSeparatorCmd,	TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
-	{"size",	FileAttrSizeCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
+	{"size",	FileAttrSizeCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
 	{"split",	PathSplitCmd,		TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"stat",	FileAttrStatCmd,	TclCompileBasic2ArgCmd, NULL, NULL, 0},
+	{"stat",	FileAttrStatCmd,	TclCompileBasic2ArgCmd, NULL, NULL, 1},
 	{"system",	PathFilesystemCmd,	TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
-	{"tail",	PathTailCmd,		TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"tempfile",	TclFileTemporaryCmd,	TclCompileBasic0To2ArgCmd, NULL, NULL, 0},
-	{"type",	FileAttrTypeCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
-	{"volumes",	FilesystemVolumesCmd,	TclCompileBasic0ArgCmd, NULL, NULL, 0},
-	{"writable",	FileAttrIsWritableCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0},
+	{"tail",	PathTailCmd,		TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"tempfile",	TclFileTemporaryCmd,	TclCompileBasic0To2ArgCmd, NULL, NULL, 1},
+	{"type",	FileAttrTypeCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
+	{"volumes",	FilesystemVolumesCmd,	TclCompileBasic0ArgCmd, NULL, NULL, 1},
+	{"writable",	FileAttrIsWritableCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 1},
 	{NULL, NULL, NULL, NULL, NULL, 0}
     };
     return TclMakeEnsemble(interp, "file", initMap);
@@ -1216,141 +1105,6 @@ TclInitFileCmd(
 /*
  *----------------------------------------------------------------------
  *
- * TclMakeFileCommandSafe --
- *
- *	This function hides the unsafe subcommands of the "file" Tcl command
- *	ensemble. It must only be called from TclHideUnsafeCommands.
- *
- * Results:
- *	A standard Tcl result.
- *
- * Side effects:
- *	Adds commands to the table of hidden commands.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclMakeFileCommandSafe(
-    Tcl_Interp *interp)
-{
-    static const struct {
-	const char *cmdName;
-	int unsafe;
-    } unsafeInfo[] = {
-	{"atime",	 1},
-	{"attributes",	 1},
-	{"channels",	 0},
-	{"copy",	 1},
-	{"delete",	 1},
-	{"dirname",	 1},
-	{"executable",	 1},
-	{"exists",	 1},
-	{"extension",	 1},
-	{"isdirectory",	 1},
-	{"isfile",	 1},
-	{"join",	 0},
-	{"link",	 1},
-	{"lstat",	 1},
-	{"mtime",	 1},
-	{"mkdir",	 1},
-	{"nativename",	 1},
-	{"normalize",	 1},
-	{"owned",	 1},
-	{"pathtype",	 0},
-	{"readable",	 1},
-	{"readlink",	 1},
-	{"rename",	 1},
-	{"rootname",	 1},
-	{"separator",	 0},
-	{"size",	 1},
-	{"split",	 0},
-	{"stat",	 1},
-	{"system",	 0},
-	{"tail",	 1},
-	{"tempfile",	 1},
-	{"type",	 1},
-	{"volumes",	 1},
-	{"writable",	 1},
-	{NULL, 0}
-    };
-    int i;
-    Tcl_DString oldBuf, newBuf;
-
-    Tcl_DStringInit(&oldBuf);
-    TclDStringAppendLiteral(&oldBuf, "::tcl::file::");
-    Tcl_DStringInit(&newBuf);
-    TclDStringAppendLiteral(&newBuf, "tcl:file:");
-    for (i=0 ; unsafeInfo[i].cmdName != NULL ; i++) {
-	if (unsafeInfo[i].unsafe) {
-	    const char *oldName, *newName;
-
-	    Tcl_DStringSetLength(&oldBuf, 13);
-	    oldName = Tcl_DStringAppend(&oldBuf, unsafeInfo[i].cmdName, -1);
-	    Tcl_DStringSetLength(&newBuf, 9);
-	    newName = Tcl_DStringAppend(&newBuf, unsafeInfo[i].cmdName, -1);
-	    if (TclRenameCommand(interp, oldName, "___tmp") != TCL_OK
-		    || Tcl_HideCommand(interp, "___tmp", newName) != TCL_OK) {
-		Tcl_Panic("problem making 'file %s' safe: %s",
-			unsafeInfo[i].cmdName,
-			Tcl_GetString(Tcl_GetObjResult(interp)));
-	    }
-	    Tcl_CreateObjCommand(interp, oldName, BadFileSubcommand,
-		    (ClientData) unsafeInfo[i].cmdName, NULL);
-	}
-    }
-    Tcl_DStringFree(&oldBuf);
-    Tcl_DStringFree(&newBuf);
-
-    /*
-     * Ugh. The [file] command is now actually safe, but it is assumed by
-     * scripts that it is not, which messes up security policies. [Bug
-     * 3211758]
-     */
-
-    if (Tcl_HideCommand(interp, "file", "file") != TCL_OK) {
-	Tcl_Panic("problem making 'file' safe: %s",
-		Tcl_GetString(Tcl_GetObjResult(interp)));
-    }
-    return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * BadFileSubcommand --
- *
- *	Command used to act as a backstop implementation when subcommands of
- *	"file" are unsafe (the real implementations of the subcommands are
- *	hidden). The clientData is always the full official subcommand name.
- *
- * Results:
- *	A standard Tcl result (always a TCL_ERROR).
- *
- * Side effects:
- *	None.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-BadFileSubcommand(
-    ClientData clientData,
-    Tcl_Interp *interp,
-    int objc,
-    Tcl_Obj *const objv[])
-{
-    const char *subcommandName = (const char *) clientData;
-
-    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
-	    "not allowed to invoke subcommand %s of file", subcommandName));
-    Tcl_SetErrorCode(interp, "TCL", "SAFE", "SUBCOMMAND", NULL);
-    return TCL_ERROR;
-}
-
-/*
- *----------------------------------------------------------------------
- *
  * FileAttrAccessTimeCmd --
  *
  *	This function is invoked to process the "file atime" Tcl command. See
diff --git a/generic/tclCmdIL.c b/generic/tclCmdIL.c
index 3faaa5a..434840e 100644
--- a/generic/tclCmdIL.c
+++ b/generic/tclCmdIL.c
@@ -138,6 +138,8 @@ static int		InfoScriptCmd(ClientData dummy, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
 static int		InfoSharedlibCmd(ClientData dummy, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
+static int		InfoCmdTypeCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
 static int		InfoTclVersionCmd(ClientData dummy, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
 static SortElement *	MergeLists(SortElement *leftPtr, SortElement *rightPtr,
@@ -156,6 +158,7 @@ static const EnsembleImplMap defaultInfoMap[] = {
     {"args",		   InfoArgsCmd,		    TclCompileBasic1ArgCmd, NULL, NULL, 0},
     {"body",		   InfoBodyCmd,		    TclCompileBasic1ArgCmd, NULL, NULL, 0},
     {"cmdcount",	   InfoCmdCountCmd,	    TclCompileBasic0ArgCmd, NULL, NULL, 0},
+    {"cmdtype",		   InfoCmdTypeCmd,	    TclCompileBasic1ArgCmd, NULL, NULL, 1},
     {"commands",	   InfoCommandsCmd,	    TclCompileInfoCommandsCmd, NULL, NULL, 0},
     {"complete",	   InfoCompleteCmd,	    TclCompileBasic1ArgCmd, NULL, NULL, 0},
     {"coroutine",	   TclInfoCoroutineCmd,     TclCompileInfoCoroutineCmd, NULL, NULL, 0},
@@ -170,7 +173,7 @@ static const EnsembleImplMap defaultInfoMap[] = {
     {"library",		   InfoLibraryCmd,	    TclCompileBasic0ArgCmd, NULL, NULL, 0},
     {"loaded",		   InfoLoadedCmd,	    TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
     {"locals",		   TclInfoLocalsCmd,	    TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
-    {"nameofexecutable",   InfoNameOfExecutableCmd, TclCompileBasic0ArgCmd, NULL, NULL, 0},
+    {"nameofexecutable",   InfoNameOfExecutableCmd, TclCompileBasic0ArgCmd, NULL, NULL, 1},
     {"patchlevel",	   InfoPatchLevelCmd,	    TclCompileBasic0ArgCmd, NULL, NULL, 0},
     {"procs",		   InfoProcsCmd,	    TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
     {"script",		   InfoScriptCmd,	    TclCompileBasic0Or1ArgCmd, NULL, NULL, 0},
@@ -2132,6 +2135,60 @@ InfoTclVersionCmd(
 /*
  *----------------------------------------------------------------------
  *
+ * InfoCmdTypeCmd --
+ *
+ *	Called to implement the "info cmdtype" command that returns the type
+ *	of a given command. Handles the following syntax:
+ *
+ *	    info cmdtype cmdName
+ *
+ * Results:
+ *	Returns TCL_OK if successful and TCL_ERROR if there is an error.
+ *
+ * Side effects:
+ *	Returns a type name. If there is an error, the result is an error
+ *	message.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+InfoCmdTypeCmd(
+    ClientData dummy,		/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    Tcl_Command command;
+
+    if (objc != 2) {
+	Tcl_WrongNumArgs(interp, 1, objv, "commandName");
+	return TCL_ERROR;
+    }
+    command = Tcl_FindCommand(interp, Tcl_GetString(objv[1]), NULL,
+	    TCL_LEAVE_ERR_MSG);
+    if (command == NULL) {
+	return TCL_ERROR;
+    }
+
+    /*
+     * There's one special case: safe slave interpreters can't see aliases as
+     * aliases as they're part of the security mechanisms.
+     */
+
+    if (Tcl_IsSafe(interp)
+	    && (((Command *) command)->objProc == TclAliasObjCmd)) {
+	Tcl_AppendResult(interp, "native", NULL);
+    } else {
+	Tcl_SetObjResult(interp,
+		Tcl_NewStringObj(TclGetCommandTypeName(command), -1));
+    }
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * Tcl_JoinObjCmd --
  *
  *	This procedure is invoked to process the "join" Tcl command. See the
@@ -2730,21 +2787,10 @@ Tcl_LreplaceObjCmd(
     if (first < 0) {
 	first = 0;
     }
-
-    /*
-     * Complain if the user asked for a start element that is greater than the
-     * list length. This won't ever trigger for the "end-*" case as that will
-     * be properly constrained by TclGetIntForIndex because we use listLen-1
-     * (to allow for replacing the last elem).
-     */
-
-    if ((first >= listLen) && (listLen > 0)) {
-	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
-		"list doesn't contain element %s", TclGetString(objv[2])));
-	Tcl_SetErrorCode(interp, "TCL", "OPERATION", "LREPLACE", "BADIDX",
-		NULL);
-	return TCL_ERROR;
+    if (first > listLen) {
+	first = listLen;
     }
+
     if (last >= listLen) {
 	last = listLen - 1;
     }
diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index 82e420c..d5ac7dd 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -258,7 +258,7 @@ Tcl_RegexpObjCmd(
     stringLength = Tcl_GetCharLength(objPtr);
 
     if (startIndex) {
-	TclGetIntForIndexM(NULL, startIndex, stringLength, &offset);
+	TclGetIntForIndexM(interp, startIndex, stringLength, &offset);
 	Tcl_DecrRefCount(startIndex);
 	if (offset < 0) {
 	    offset = 0;
@@ -582,7 +582,7 @@ Tcl_RegsubObjCmd(
     if (startIndex) {
 	int stringLength = Tcl_GetCharLength(objv[1]);
 
-	TclGetIntForIndexM(NULL, startIndex, stringLength, &offset);
+	TclGetIntForIndexM(interp, startIndex, stringLength, &offset);
 	Tcl_DecrRefCount(startIndex);
 	if (offset < 0) {
 	    offset = 0;
@@ -1680,10 +1680,6 @@ StringIsCmd(
 	chcomp = Tcl_UniCharIsGraph;
 	break;
     case STR_IS_INT:
-	if (TCL_OK == TclGetIntFromObj(NULL, objPtr, &i)) {
-	    break;
-	}
-	goto failedIntParse;
     case STR_IS_ENTIER:
 	if ((objPtr->typePtr == &tclIntType) ||
 		(objPtr->typePtr == &tclBignumType)) {
@@ -1731,7 +1727,6 @@ StringIsCmd(
 	    break;
 	}
 
-    failedIntParse:
 	string1 = TclGetStringFromObj(objPtr, &length1);
 	if (length1 == 0) {
 	    if (strict) {
@@ -1906,7 +1901,7 @@ static int
 UniCharIsHexDigit(
     int character)
 {
-    return (character >= 0) && (character < 0x80) && isxdigit(character);
+    return (character >= 0) && (character < 0x80) && isxdigit(UCHAR(character));
 }
 
 /*
diff --git a/generic/tclCompCmdsGR.c b/generic/tclCompCmdsGR.c
index 1209caf..f9cf3d8 100644
--- a/generic/tclCompCmdsGR.c
+++ b/generic/tclCompCmdsGR.c
@@ -1474,7 +1474,7 @@ TclCompileLreplaceCmd(
 {
     Tcl_Token *tokenPtr, *listTokenPtr;
     DefineLineInformation;	/* TIP #280 */
-    int idx1, idx2, i, offset, offset2;
+    int idx1, idx2, i;
     int emptyPrefix=1, suffixStart = 0;
 
     if (parsePtr->numWords < 4) {
@@ -1495,23 +1495,6 @@ TclCompileLreplaceCmd(
     }
 
     /*
-     * idx1, idx2 are the conventional encoded forms of the tokens parsed
-     * as all forms of index values.  Values of idx1 that come before the
-     * list are treated the same as if they were the start of the list.
-     * Values of idx2 that come after the list are treated the same as if
-     * they were the end of the list.
-     */
-
-    if (idx1 == TCL_INDEX_AFTER) {
-	/*
-	 * [lreplace] treats idx1 value end+1 differently from end+2, etc.
-	 * The operand encoding cannot distinguish them, so we must bail
-	 * out to direct evaluation.
-	 */
-	return TCL_ERROR;
-    }
-
-    /*
      * General structure of the [lreplace] result is
      *		prefix replacement suffix
      * In a few cases we can predict various parts will be empty and
@@ -1522,7 +1505,9 @@ TclCompileLreplaceCmd(
      * we must defer to direct evaluation.
      */
 
-    if (idx2 == TCL_INDEX_BEFORE) {
+    if (idx1 == TCL_INDEX_AFTER) {
+	suffixStart = idx1;
+    } else if (idx2 == TCL_INDEX_BEFORE) {
 	suffixStart = idx1;
     } else if (idx2 == TCL_INDEX_END) {
 	suffixStart = TCL_INDEX_AFTER;
@@ -1554,42 +1539,6 @@ TclCompileLreplaceCmd(
 	emptyPrefix = 0;
     }
 
-    /*
-     * [lreplace] raises an error when idx1 points after the list, but
-     * only when the list is not empty. This is maximum stupidity.
-     *
-     * TODO: TIP this nonsense away!
-     */
-    if (idx1 >= TCL_INDEX_START) {
-	if (emptyPrefix) {
-	    TclEmitOpcode(	INST_DUP,			envPtr);
-	} else {
-	    TclEmitInstInt4(	INST_OVER, 1,			envPtr);
-	}
-	TclEmitOpcode(		INST_LIST_LENGTH,		envPtr);
-	TclEmitOpcode(		INST_DUP,			envPtr);
-	offset = CurrentOffset(envPtr);
-	TclEmitInstInt1(	INST_JUMP_FALSE1, 0,		envPtr);
-
-	/* List is not empty */
-	TclEmitPush(TclAddLiteralObj(envPtr, Tcl_NewIntObj(idx1),
-							NULL),	envPtr);
-	TclEmitOpcode(		INST_GT,			envPtr);
-	offset2 = CurrentOffset(envPtr);
-	TclEmitInstInt1(	INST_JUMP_TRUE1, 0,		envPtr);
-
-	/* Idx1 >= list length ===> raise an error */
-	TclEmitPush(TclAddLiteralObj(envPtr, Tcl_ObjPrintf(
-		"list doesn't contain element %d", idx1), NULL), envPtr);
-	CompileReturnInternal(envPtr, INST_RETURN_IMM, TCL_ERROR, 0,
-		Tcl_ObjPrintf("-errorcode {TCL OPERATION LREPLACE BADIDX}"));
-	TclStoreInt1AtPtr(CurrentOffset(envPtr) - offset,
-		envPtr->codeStart + offset + 1);
-	TclEmitOpcode(		INST_POP,			envPtr);
-	TclStoreInt1AtPtr(CurrentOffset(envPtr) - offset2,
-		envPtr->codeStart + offset2 + 1);
-    }
-
     if ((idx1 == suffixStart) && (parsePtr->numWords == 4)) {
 	/*
 	 * This is a "no-op". Example: [lreplace {a b c} 2 0]
diff --git a/generic/tclCompCmdsSZ.c b/generic/tclCompCmdsSZ.c
index 2d9f039..50f56fe 100644
--- a/generic/tclCompCmdsSZ.c
+++ b/generic/tclCompCmdsSZ.c
@@ -748,14 +748,11 @@ TclCompileStringIsCmd(
 	}
 
 	switch (t) {
-	case STR_IS_INT:
-	    PUSH(	"1");
-	    OP(		EQ);
-	    break;
 	case STR_IS_WIDE:
 	    PUSH(	"2");
 	    OP(		LE);
 	    break;
+	case STR_IS_INT:
 	case STR_IS_ENTIER:
 	    PUSH(	"3");
 	    OP(		LE);
@@ -1410,7 +1407,7 @@ static int
 UniCharIsHexDigit(
     int character)
 {
-    return (character >= 0) && (character < 0x80) && isxdigit(character);
+    return (character >= 0) && (character < 0x80) && isxdigit(UCHAR(character));
 }
 
 StringClassDesc const tclStringClassTable[] = {
diff --git a/generic/tclCompExpr.c b/generic/tclCompExpr.c
index b854b0f..f8835b9 100644
--- a/generic/tclCompExpr.c
+++ b/generic/tclCompExpr.c
@@ -1759,7 +1759,7 @@ ConvertTreeToTokens(
 
 		/*
 		 * All the Tcl_Tokens allocated and filled belong to
-		 * this subexpresion. The first token is the leading
+		 * this subexpression. The first token is the leading
 		 * TCL_TOKEN_SUB_EXPR token, and all the rest (one fewer)
 		 * are its components.
 		 */
diff --git a/generic/tclCompile.h b/generic/tclCompile.h
index 8746afc..d827382 100644
--- a/generic/tclCompile.h
+++ b/generic/tclCompile.h
@@ -1473,7 +1473,7 @@ MODULE_SCOPE int	TclPushProcCallFrame(ClientData clientData,
 #endif
 
 #define TclGetInt4AtPtr(p) \
-    (((int) TclGetInt1AtPtr(p) << 24) |				\
+    (((int) (TclGetUInt1AtPtr(p) << 24)) |				\
 		     (*((p)+1) << 16) |				\
 		     (*((p)+2) <<  8) |				\
 		     (*((p)+3)))
diff --git a/generic/tclDate.c b/generic/tclDate.c
index 717a1b3..f720325 100644
--- a/generic/tclDate.c
+++ b/generic/tclDate.c
@@ -1,14 +1,13 @@
-/* A Bison parser, made by GNU Bison 2.3.  */
+/* A Bison parser, made by GNU Bison 3.1.  */
 
-/* Skeleton implementation for Bison's Yacc-like parsers in C
+/* Bison implementation for Yacc-like parsers in C
 
-   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-   Free Software Foundation, Inc.
+   Copyright (C) 1984, 1989-1990, 2000-2015, 2018 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -16,9 +15,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* As a special exception, you may create a larger work that contains
    part or all of the Bison parser skeleton and distribute that work
@@ -47,7 +44,7 @@
 #define YYBISON 1
 
 /* Bison version.  */
-#define YYBISON_VERSION "2.3"
+#define YYBISON_VERSION "3.1"
 
 /* Skeleton name.  */
 #define YYSKELETON_NAME "yacc.c"
@@ -55,64 +52,19 @@
 /* Pure parsers.  */
 #define YYPURE 1
 
-/* Using locations.  */
-#define YYLSP_NEEDED 1
+/* Push parsers.  */
+#define YYPUSH 0
 
-/* Substitute the variable and function names.  */
-#define yyparse TclDateparse
-#define yylex   TclDatelex
-#define yyerror TclDateerror
-#define yylval  TclDatelval
-#define yychar  TclDatechar
-#define yydebug TclDatedebug
-#define yynerrs TclDatenerrs
-#define yylloc TclDatelloc
-
-/* Tokens.  */
-#ifndef YYTOKENTYPE
-# define YYTOKENTYPE
-   /* Put the tokens into the symbol table, so that GDB and other debuggers
-      know about them.  */
-   enum yytokentype {
-     tAGO = 258,
-     tDAY = 259,
-     tDAYZONE = 260,
-     tID = 261,
-     tMERIDIAN = 262,
-     tMONTH = 263,
-     tMONTH_UNIT = 264,
-     tSTARDATE = 265,
-     tSEC_UNIT = 266,
-     tSNUMBER = 267,
-     tUNUMBER = 268,
-     tZONE = 269,
-     tEPOCH = 270,
-     tDST = 271,
-     tISOBASE = 272,
-     tDAY_UNIT = 273,
-     tNEXT = 274
-   };
-#endif
-/* Tokens.  */
-#define tAGO 258
-#define tDAY 259
-#define tDAYZONE 260
-#define tID 261
-#define tMERIDIAN 262
-#define tMONTH 263
-#define tMONTH_UNIT 264
-#define tSTARDATE 265
-#define tSEC_UNIT 266
-#define tSNUMBER 267
-#define tUNUMBER 268
-#define tZONE 269
-#define tEPOCH 270
-#define tDST 271
-#define tISOBASE 272
-#define tDAY_UNIT 273
-#define tNEXT 274
+/* Pull parsers.  */
+#define YYPULL 1
 
 
+/* Substitute the variable and function names.  */
+#define yyparse         TclDateparse
+#define yylex           TclDatelex
+#define yyerror         TclDateerror
+#define yydebug         TclDatedebug
+#define yynerrs         TclDatenerrs
 
 
 /* Copy the first part of user declarations.  */
@@ -129,6 +81,7 @@
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
  */
 #include "tclInt.h"
 
@@ -256,10 +209,14 @@ typedef enum _MERIDIAN {
 
 
 
-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG 0
-#endif
+
+# ifndef YY_NULLPTR
+#  if defined __cplusplus && 201103L <= __cplusplus
+#   define YY_NULLPTR nullptr
+#  else
+#   define YY_NULLPTR 0
+#  endif
+# endif
 
 /* Enabling verbose error messages.  */
 #ifdef YYERROR_VERBOSE
@@ -269,40 +226,78 @@ typedef enum _MERIDIAN {
 # define YYERROR_VERBOSE 0
 #endif
 
-/* Enabling the token table.  */
-#ifndef YYTOKEN_TABLE
-# define YYTOKEN_TABLE 0
+
+/* Debug traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+#if YYDEBUG
+extern int TclDatedebug;
 #endif
 
+/* Token type.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+  enum yytokentype
+  {
+    tAGO = 258,
+    tDAY = 259,
+    tDAYZONE = 260,
+    tID = 261,
+    tMERIDIAN = 262,
+    tMONTH = 263,
+    tMONTH_UNIT = 264,
+    tSTARDATE = 265,
+    tSEC_UNIT = 266,
+    tSNUMBER = 267,
+    tUNUMBER = 268,
+    tZONE = 269,
+    tEPOCH = 270,
+    tDST = 271,
+    tISOBASE = 272,
+    tDAY_UNIT = 273,
+    tNEXT = 274
+  };
+#endif
+
+/* Value type.  */
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
-typedef union YYSTYPE
 
+union YYSTYPE
 {
+
+
     time_t Number;
     enum _MERIDIAN Meridian;
-}
-/* Line 187 of yacc.c.  */
 
-	YYSTYPE;
-# define yystype YYSTYPE /* obsolescent; will be withdrawn */
-# define YYSTYPE_IS_DECLARED 1
+
+};
+
+typedef union YYSTYPE YYSTYPE;
 # define YYSTYPE_IS_TRIVIAL 1
+# define YYSTYPE_IS_DECLARED 1
 #endif
 
+/* Location type.  */
 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
-typedef struct YYLTYPE
+typedef struct YYLTYPE YYLTYPE;
+struct YYLTYPE
 {
   int first_line;
   int first_column;
   int last_line;
   int last_column;
-} YYLTYPE;
-# define yyltype YYLTYPE /* obsolescent; will be withdrawn */
+};
 # define YYLTYPE_IS_DECLARED 1
 # define YYLTYPE_IS_TRIVIAL 1
 #endif
 
 
+
+int TclDateparse (DateInfo* info);
+
+
+
 /* Copy the second part of user declarations.  */
 
 
@@ -322,8 +317,6 @@ MODULE_SCOPE int	yyparse(DateInfo*);
 
 
 
-/* Line 216 of yacc.c.  */
-
 
 #ifdef short
 # undef short
@@ -337,72 +330,103 @@ typedef unsigned char yytype_uint8;
 
 #ifdef YYTYPE_INT8
 typedef YYTYPE_INT8 yytype_int8;
-#elif (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-typedef signed char yytype_int8;
 #else
-typedef short int yytype_int8;
+typedef signed char yytype_int8;
 #endif
 
 #ifdef YYTYPE_UINT16
 typedef YYTYPE_UINT16 yytype_uint16;
 #else
-typedef unsigned short int yytype_uint16;
+typedef unsigned short yytype_uint16;
 #endif
 
 #ifdef YYTYPE_INT16
 typedef YYTYPE_INT16 yytype_int16;
 #else
-typedef short int yytype_int16;
+typedef short yytype_int16;
 #endif
 
 #ifndef YYSIZE_T
 # ifdef __SIZE_TYPE__
 #  define YYSIZE_T __SIZE_TYPE__
-# else
+# elif defined size_t
 #  define YYSIZE_T size_t
+# elif ! defined YYSIZE_T
+#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYSIZE_T size_t
+# else
+#  define YYSIZE_T unsigned
 # endif
 #endif
 
 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
 
 #ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
-#   define YY_(msgid) dgettext ("bison-runtime", msgid)
+#   define YY_(Msgid) dgettext ("bison-runtime", Msgid)
 #  endif
 # endif
 # ifndef YY_
-#  define YY_(msgid) msgid
+#  define YY_(Msgid) Msgid
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE
+# if (defined __GNUC__                                               \
+      && (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)))  \
+     || defined __SUNPRO_C && 0x5110 <= __SUNPRO_C
+#  define YY_ATTRIBUTE(Spec) __attribute__(Spec)
+# else
+#  define YY_ATTRIBUTE(Spec) /* empty */
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE_PURE
+# define YY_ATTRIBUTE_PURE   YY_ATTRIBUTE ((__pure__))
+#endif
+
+#ifndef YY_ATTRIBUTE_UNUSED
+# define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__))
+#endif
+
+#if !defined _Noreturn \
+     && (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112)
+# if defined _MSC_VER && 1200 <= _MSC_VER
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn YY_ATTRIBUTE ((__noreturn__))
 # endif
 #endif
 
 /* Suppress unused-variable warnings by "using" E.  */
 #if ! defined lint || defined __GNUC__
-# define YYUSE(e) ((void) (e))
+# define YYUSE(E) ((void) (E))
 #else
-# define YYUSE(e) /* empty */
+# define YYUSE(E) /* empty */
 #endif
 
-/* Identity function, used to suppress warnings about constant conditions.  */
-#ifndef lint
-# define YYID(n) (n)
-#else
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-static int
-YYID (int i)
+#if defined __GNUC__ && ! defined __ICC && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
+/* Suppress an incorrect diagnostic about yylval being uninitialized.  */
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
+    _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END \
+    _Pragma ("GCC diagnostic pop")
 #else
-static int
-YYID (i)
-    int i;
+# define YY_INITIAL_VALUE(Value) Value
 #endif
-{
-  return i;
-}
+#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END
+#endif
+#ifndef YY_INITIAL_VALUE
+# define YY_INITIAL_VALUE(Value) /* Nothing. */
 #endif
 
+
 #if ! defined yyoverflow || YYERROR_VERBOSE
 
 /* The parser invokes alloca or malloc; define the necessary symbols.  */
@@ -420,11 +444,11 @@ YYID (i)
 #    define alloca _alloca
 #   else
 #    define YYSTACK_ALLOC alloca
-#    if ! defined _ALLOCA_H && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
+#    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
 #     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
-#     ifndef _STDLIB_H
-#      define _STDLIB_H 1
+      /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
+#     ifndef EXIT_SUCCESS
+#      define EXIT_SUCCESS 0
 #     endif
 #    endif
 #   endif
@@ -432,8 +456,8 @@ YYID (i)
 # endif
 
 # ifdef YYSTACK_ALLOC
-   /* Pacify GCC's `empty if-body' warning.  */
-#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
+   /* Pacify GCC's 'empty if-body' warning.  */
+#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
 #  ifndef YYSTACK_ALLOC_MAXIMUM
     /* The OS might guarantee only one guard page at the bottom of the stack,
        and a page size can be as small as 4096 bytes.  So we cannot safely
@@ -447,25 +471,23 @@ YYID (i)
 #  ifndef YYSTACK_ALLOC_MAXIMUM
 #   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
 #  endif
-#  if (defined __cplusplus && ! defined _STDLIB_H \
+#  if (defined __cplusplus && ! defined EXIT_SUCCESS \
        && ! ((defined YYMALLOC || defined malloc) \
-	     && (defined YYFREE || defined free)))
+             && (defined YYFREE || defined free)))
 #   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
-#   ifndef _STDLIB_H
-#    define _STDLIB_H 1
+#   ifndef EXIT_SUCCESS
+#    define EXIT_SUCCESS 0
 #   endif
 #  endif
 #  ifndef YYMALLOC
 #   define YYMALLOC malloc
-#   if ! defined malloc && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
+#   if ! defined malloc && ! defined EXIT_SUCCESS
 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
 #  ifndef YYFREE
 #   define YYFREE free
-#   if ! defined free && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
+#   if ! defined free && ! defined EXIT_SUCCESS
 void free (void *); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
@@ -475,15 +497,15 @@ void free (void *); /* INFRINGES ON USER NAME SPACE */
 
 #if (! defined yyoverflow \
      && (! defined __cplusplus \
-	 || (defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
-	     && defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+         || (defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
+             && defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
 
 /* A type that is properly aligned for any stack member.  */
 union yyalloc
 {
-  yytype_int16 yyss;
-  YYSTYPE yyvs;
-    YYLTYPE yyls;
+  yytype_int16 yyss_alloc;
+  YYSTYPE yyvs_alloc;
+  YYLTYPE yyls_alloc;
 };
 
 /* The size of the maximum gap between one aligned stack and the next.  */
@@ -495,42 +517,46 @@ union yyalloc
      ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
       + 2 * YYSTACK_GAP_MAXIMUM)
 
-/* Copy COUNT objects from FROM to TO.  The source and destination do
-   not overlap.  */
-# ifndef YYCOPY
-#  if defined __GNUC__ && 1 < __GNUC__
-#   define YYCOPY(To, From, Count) \
-      __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
-#  else
-#   define YYCOPY(To, From, Count)		\
-      do					\
-	{					\
-	  YYSIZE_T yyi;				\
-	  for (yyi = 0; yyi < (Count); yyi++)	\
-	    (To)[yyi] = (From)[yyi];		\
-	}					\
-      while (YYID (0))
-#  endif
-# endif
+# define YYCOPY_NEEDED 1
 
 /* Relocate STACK from its old location to the new one.  The
    local variables YYSIZE and YYSTACKSIZE give the old and new number of
    elements in the stack, and YYPTR gives the new location of the
    stack.  Advance YYPTR to a properly aligned location for the next
    stack.  */
-# define YYSTACK_RELOCATE(Stack)					\
-    do									\
-      {									\
-	YYSIZE_T yynewbytes;						\
-	YYCOPY (&yyptr->Stack, Stack, yysize);				\
-	Stack = &yyptr->Stack;						\
-	yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
-	yyptr += yynewbytes / sizeof (*yyptr);				\
-      }									\
-    while (YYID (0))
+# define YYSTACK_RELOCATE(Stack_alloc, Stack)                           \
+    do                                                                  \
+      {                                                                 \
+        YYSIZE_T yynewbytes;                                            \
+        YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
+        Stack = &yyptr->Stack_alloc;                                    \
+        yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
+        yyptr += yynewbytes / sizeof (*yyptr);                          \
+      }                                                                 \
+    while (0)
 
 #endif
 
+#if defined YYCOPY_NEEDED && YYCOPY_NEEDED
+/* Copy COUNT objects from SRC to DST.  The source and destination do
+   not overlap.  */
+# ifndef YYCOPY
+#  if defined __GNUC__ && 1 < __GNUC__
+#   define YYCOPY(Dst, Src, Count) \
+      __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
+#  else
+#   define YYCOPY(Dst, Src, Count)              \
+      do                                        \
+        {                                       \
+          YYSIZE_T yyi;                         \
+          for (yyi = 0; yyi < (Count); yyi++)   \
+            (Dst)[yyi] = (Src)[yyi];            \
+        }                                       \
+      while (0)
+#  endif
+# endif
+#endif /* !YYCOPY_NEEDED */
+
 /* YYFINAL -- State number of the termination state.  */
 #define YYFINAL  2
 /* YYLAST -- Last index in YYTABLE.  */
@@ -542,17 +568,19 @@ union yyalloc
 #define YYNNTS  16
 /* YYNRULES -- Number of rules.  */
 #define YYNRULES  56
-/* YYNRULES -- Number of states.  */
+/* YYNSTATES -- Number of states.  */
 #define YYNSTATES  83
 
-/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
+/* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
+   by yylex, with out-of-bounds checking.  */
 #define YYUNDEFTOK  2
 #define YYMAXUTOK   274
 
-#define YYTRANSLATE(YYX)						\
-  ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
+#define YYTRANSLATE(YYX)                                                \
+  ((unsigned) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
 
-/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
+/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
+   as returned by yylex, without out-of-bounds checking.  */
 static const yytype_uint8 yytranslate[] =
 {
        0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
@@ -586,54 +614,19 @@ static const yytype_uint8 yytranslate[] =
 };
 
 #if YYDEBUG
-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
-   YYRHS.  */
-static const yytype_uint8 yyprhs[] =
-{
-       0,     0,     3,     4,     7,     9,    11,    13,    15,    17,
-      19,    21,    23,    25,    28,    33,    39,    46,    54,    57,
-      59,    61,    63,    66,    69,    73,    76,    80,    86,    88,
-      94,   100,   103,   108,   111,   113,   117,   120,   124,   128,
-     136,   139,   144,   147,   149,   153,   156,   159,   163,   165,
-     167,   169,   171,   173,   175,   177,   178
-};
-
-/* YYRHS -- A `-1'-separated list of the rules' RHS.  */
-static const yytype_int8 yyrhs[] =
-{
-      27,     0,    -1,    -1,    27,    28,    -1,    29,    -1,    30,
-      -1,    32,    -1,    33,    -1,    31,    -1,    36,    -1,    34,
-      -1,    35,    -1,    40,    -1,    13,     7,    -1,    13,    20,
-      13,    41,    -1,    13,    20,    13,    21,    13,    -1,    13,
-      20,    13,    20,    13,    41,    -1,    13,    20,    13,    20,
-      13,    21,    13,    -1,    14,    16,    -1,    14,    -1,     5,
-      -1,     4,    -1,     4,    22,    -1,    13,     4,    -1,    38,
-      13,     4,    -1,    19,     4,    -1,    13,    23,    13,    -1,
-      13,    23,    13,    23,    13,    -1,    17,    -1,    13,    21,
-       8,    21,    13,    -1,    13,    21,    13,    21,    13,    -1,
-       8,    13,    -1,     8,    13,    22,    13,    -1,    13,     8,
-      -1,    15,    -1,    13,     8,    13,    -1,    19,     8,    -1,
-      19,    13,     8,    -1,    17,    14,    17,    -1,    17,    14,
-      13,    20,    13,    20,    13,    -1,    17,    17,    -1,    10,
-      13,    24,    13,    -1,    37,     3,    -1,    37,    -1,    38,
-      13,    39,    -1,    13,    39,    -1,    19,    39,    -1,    19,
-      13,    39,    -1,    39,    -1,    21,    -1,    25,    -1,    11,
-      -1,    18,    -1,     9,    -1,    13,    -1,    -1,     7,    -1
-};
-
-/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
+  /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_uint16 yyrline[] =
 {
-       0,   225,   225,   226,   229,   232,   235,   238,   241,   244,
-     247,   251,   256,   259,   265,   271,   279,   285,   296,   300,
-     304,   310,   314,   318,   322,   326,   332,   336,   341,   346,
-     351,   356,   360,   365,   369,   374,   381,   385,   391,   400,
-     409,   419,   433,   438,   441,   444,   447,   450,   453,   458,
-     461,   466,   470,   474,   480,   498,   501
+       0,   223,   223,   224,   227,   230,   233,   236,   239,   242,
+     245,   249,   254,   257,   263,   269,   277,   283,   294,   298,
+     302,   308,   312,   316,   320,   324,   330,   334,   339,   344,
+     349,   354,   358,   363,   367,   372,   379,   383,   389,   398,
+     407,   417,   431,   436,   439,   442,   445,   448,   451,   456,
+     459,   464,   468,   472,   478,   496,   499
 };
 #endif
 
-#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+#if YYDEBUG || YYERROR_VERBOSE || 0
 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
    First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
 static const char *const yytname[] =
@@ -644,13 +637,13 @@ static const char *const yytname[] =
   "tDAY_UNIT", "tNEXT", "':'", "'-'", "','", "'/'", "'.'", "'+'",
   "$accept", "spec", "item", "time", "zone", "day", "date", "ordMonth",
   "iso", "trek", "relspec", "relunits", "sign", "unit", "number",
-  "o_merid", 0
+  "o_merid", YY_NULLPTR
 };
 #endif
 
 # ifdef YYPRINT
-/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
-   token YYLEX-NUM.  */
+/* YYTOKNUM[NUM] -- (External) token number corresponding to the
+   (internal) symbol number NUM (which must be that of a token).  */
 static const yytype_uint16 yytoknum[] =
 {
        0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
@@ -659,54 +652,18 @@ static const yytype_uint16 yytoknum[] =
 };
 # endif
 
-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
-static const yytype_uint8 yyr1[] =
-{
-       0,    26,    27,    27,    28,    28,    28,    28,    28,    28,
-      28,    28,    28,    29,    29,    29,    29,    29,    30,    30,
-      30,    31,    31,    31,    31,    31,    32,    32,    32,    32,
-      32,    32,    32,    32,    32,    32,    33,    33,    34,    34,
-      34,    35,    36,    36,    37,    37,    37,    37,    37,    38,
-      38,    39,    39,    39,    40,    41,    41
-};
+#define YYPACT_NINF -22
 
-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
-static const yytype_uint8 yyr2[] =
-{
-       0,     2,     0,     2,     1,     1,     1,     1,     1,     1,
-       1,     1,     1,     2,     4,     5,     6,     7,     2,     1,
-       1,     1,     2,     2,     3,     2,     3,     5,     1,     5,
-       5,     2,     4,     2,     1,     3,     2,     3,     3,     7,
-       2,     4,     2,     1,     3,     2,     2,     3,     1,     1,
-       1,     1,     1,     1,     1,     0,     1
-};
+#define yypact_value_is_default(Yystate) \
+  (!!((Yystate) == (-22)))
 
-/* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
-   STATE-NUM when YYTABLE doesn't specify something else to do.  Zero
-   means the default is an error.  */
-static const yytype_uint8 yydefact[] =
-{
-       2,     0,     1,    21,    20,     0,    53,     0,    51,    54,
-      19,    34,    28,    52,     0,    49,    50,     3,     4,     5,
-       8,     6,     7,    10,    11,     9,    43,     0,    48,    12,
-      22,    31,     0,    23,    13,    33,     0,     0,     0,    45,
-      18,     0,    40,    25,    36,     0,    46,    42,     0,     0,
-       0,    35,    55,     0,     0,    26,     0,    38,    37,    47,
-      24,    44,    32,    41,    56,     0,     0,    14,     0,     0,
-       0,     0,    55,    15,    29,    30,    27,     0,     0,    16,
-       0,    17,    39
-};
+#define YYTABLE_NINF -1
 
-/* YYDEFGOTO[NTERM-NUM].  */
-static const yytype_int8 yydefgoto[] =
-{
-      -1,     1,    17,    18,    19,    20,    21,    22,    23,    24,
-      25,    26,    27,    28,    29,    67
-};
+#define yytable_value_is_error(Yytable_value) \
+  0
 
-/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
-   STATE-NUM.  */
-#define YYPACT_NINF -22
+  /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+     STATE-NUM.  */
 static const yytype_int8 yypact[] =
 {
      -22,     2,   -22,   -21,   -22,    -4,   -22,     1,   -22,    22,
@@ -720,18 +677,39 @@ static const yytype_int8 yypact[] =
       64,   -22,   -22
 };
 
-/* YYPGOTO[NTERM-NUM].  */
+  /* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
+     Performed when YYTABLE does not specify something else to do.  Zero
+     means the default is an error.  */
+static const yytype_uint8 yydefact[] =
+{
+       2,     0,     1,    21,    20,     0,    53,     0,    51,    54,
+      19,    34,    28,    52,     0,    49,    50,     3,     4,     5,
+       8,     6,     7,    10,    11,     9,    43,     0,    48,    12,
+      22,    31,     0,    23,    13,    33,     0,     0,     0,    45,
+      18,     0,    40,    25,    36,     0,    46,    42,     0,     0,
+       0,    35,    55,     0,     0,    26,     0,    38,    37,    47,
+      24,    44,    32,    41,    56,     0,     0,    14,     0,     0,
+       0,     0,    55,    15,    29,    30,    27,     0,     0,    16,
+       0,    17,    39
+};
+
+  /* YYPGOTO[NTERM-NUM].  */
 static const yytype_int8 yypgoto[] =
 {
      -22,   -22,   -22,   -22,   -22,   -22,   -22,   -22,   -22,   -22,
      -22,   -22,   -22,    -9,   -22,     6
 };
 
-/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
-   positive, shift that token.  If negative, reduce the rule which
-   number is the opposite.  If zero, do what YYDEFACT says.
-   If YYTABLE_NINF, syntax error.  */
-#define YYTABLE_NINF -1
+  /* YYDEFGOTO[NTERM-NUM].  */
+static const yytype_int8 yydefgoto[] =
+{
+      -1,     1,    17,    18,    19,    20,    21,    22,    23,    24,
+      25,    26,    27,    28,    29,    67
+};
+
+  /* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM.  If
+     positive, shift that token.  If negative, reduce the rule whose
+     number is the opposite.  If YYTABLE_NINF, syntax error.  */
 static const yytype_uint8 yytable[] =
 {
       39,    30,     2,    53,    64,    46,     3,     4,    54,    31,
@@ -756,8 +734,8 @@ static const yytype_uint8 yycheck[] =
       13,    13,    20,    13,    13,    13,    13,    13,    72,    20
 };
 
-/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
-   symbol of state STATE-NUM.  */
+  /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
+     symbol of state STATE-NUM.  */
 static const yytype_uint8 yystos[] =
 {
        0,    27,     0,     4,     5,     8,     9,    10,    11,    13,
@@ -771,156 +749,179 @@ static const yytype_uint8 yystos[] =
       20,    13,    13
 };
 
-#define yyerrok		(yyerrstatus = 0)
-#define yyclearin	(yychar = YYEMPTY)
-#define YYEMPTY		(-2)
-#define YYEOF		0
+  /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+static const yytype_uint8 yyr1[] =
+{
+       0,    26,    27,    27,    28,    28,    28,    28,    28,    28,
+      28,    28,    28,    29,    29,    29,    29,    29,    30,    30,
+      30,    31,    31,    31,    31,    31,    32,    32,    32,    32,
+      32,    32,    32,    32,    32,    32,    33,    33,    34,    34,
+      34,    35,    36,    36,    37,    37,    37,    37,    37,    38,
+      38,    39,    39,    39,    40,    41,    41
+};
+
+  /* YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.  */
+static const yytype_uint8 yyr2[] =
+{
+       0,     2,     0,     2,     1,     1,     1,     1,     1,     1,
+       1,     1,     1,     2,     4,     5,     6,     7,     2,     1,
+       1,     1,     2,     2,     3,     2,     3,     5,     1,     5,
+       5,     2,     4,     2,     1,     3,     2,     3,     3,     7,
+       2,     4,     2,     1,     3,     2,     2,     3,     1,     1,
+       1,     1,     1,     1,     1,     0,     1
+};
 
-#define YYACCEPT	goto yyacceptlab
-#define YYABORT		goto yyabortlab
-#define YYERROR		goto yyerrorlab
 
+#define yyerrok         (yyerrstatus = 0)
+#define yyclearin       (yychar = YYEMPTY)
+#define YYEMPTY         (-2)
+#define YYEOF           0
 
-/* Like YYERROR except do call yyerror.  This remains here temporarily
-   to ease the transition to the new meaning of YYERROR, for GCC.
-   Once GCC version 2 has supplanted version 1, this can go.  */
+#define YYACCEPT        goto yyacceptlab
+#define YYABORT         goto yyabortlab
+#define YYERROR         goto yyerrorlab
 
-#define YYFAIL		goto yyerrlab
 
 #define YYRECOVERING()  (!!yyerrstatus)
 
-#define YYBACKUP(Token, Value)					\
-do								\
-  if (yychar == YYEMPTY && yylen == 1)				\
-    {								\
-      yychar = (Token);						\
-      yylval = (Value);						\
-      yytoken = YYTRANSLATE (yychar);				\
-      YYPOPSTACK (1);						\
-      goto yybackup;						\
-    }								\
-  else								\
-    {								\
+#define YYBACKUP(Token, Value)                                  \
+do                                                              \
+  if (yychar == YYEMPTY)                                        \
+    {                                                           \
+      yychar = (Token);                                         \
+      yylval = (Value);                                         \
+      YYPOPSTACK (yylen);                                       \
+      yystate = *yyssp;                                         \
+      goto yybackup;                                            \
+    }                                                           \
+  else                                                          \
+    {                                                           \
       yyerror (&yylloc, info, YY_("syntax error: cannot back up")); \
-      YYERROR;							\
-    }								\
-while (YYID (0))
+      YYERROR;                                                  \
+    }                                                           \
+while (0)
 
-
-#define YYTERROR	1
-#define YYERRCODE	256
+/* Error token number */
+#define YYTERROR        1
+#define YYERRCODE       256
 
 
 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
    If N is 0, then set CURRENT to the empty location which ends
    the previous symbol: RHS[0] (always defined).  */
 
-#define YYRHSLOC(Rhs, K) ((Rhs)[K])
 #ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)				\
-    do									\
-      if (YYID (N))                                                    \
-	{								\
-	  (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;	\
-	  (Current).first_column = YYRHSLOC (Rhs, 1).first_column;	\
-	  (Current).last_line    = YYRHSLOC (Rhs, N).last_line;		\
-	  (Current).last_column  = YYRHSLOC (Rhs, N).last_column;	\
-	}								\
-      else								\
-	{								\
-	  (Current).first_line   = (Current).last_line   =		\
-	    YYRHSLOC (Rhs, 0).last_line;				\
-	  (Current).first_column = (Current).last_column =		\
-	    YYRHSLOC (Rhs, 0).last_column;				\
-	}								\
-    while (YYID (0))
+# define YYLLOC_DEFAULT(Current, Rhs, N)                                \
+    do                                                                  \
+      if (N)                                                            \
+        {                                                               \
+          (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
+          (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
+          (Current).last_line    = YYRHSLOC (Rhs, N).last_line;         \
+          (Current).last_column  = YYRHSLOC (Rhs, N).last_column;       \
+        }                                                               \
+      else                                                              \
+        {                                                               \
+          (Current).first_line   = (Current).last_line   =              \
+            YYRHSLOC (Rhs, 0).last_line;                                \
+          (Current).first_column = (Current).last_column =              \
+            YYRHSLOC (Rhs, 0).last_column;                              \
+        }                                                               \
+    while (0)
 #endif
 
+#define YYRHSLOC(Rhs, K) ((Rhs)[K])
+
+
+/* Enable debugging if requested.  */
+#if YYDEBUG
+
+# ifndef YYFPRINTF
+#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYFPRINTF fprintf
+# endif
+
+# define YYDPRINTF(Args)                        \
+do {                                            \
+  if (yydebug)                                  \
+    YYFPRINTF Args;                             \
+} while (0)
+
 
 /* YY_LOCATION_PRINT -- Print the location on the stream.
    This macro was not mandated originally: define only if we know
    we won't break user code: when these are the locations we know.  */
 
 #ifndef YY_LOCATION_PRINT
-# if YYLTYPE_IS_TRIVIAL
-#  define YY_LOCATION_PRINT(File, Loc)			\
-     fprintf (File, "%d.%d-%d.%d",			\
-	      (Loc).first_line, (Loc).first_column,	\
-	      (Loc).last_line,  (Loc).last_column)
-# else
-#  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
-# endif
-#endif
-
+# if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
 
-/* YYLEX -- calling `yylex' with the right arguments.  */
+/* Print *YYLOCP on YYO.  Private, do not rely on its existence. */
 
-#ifdef YYLEX_PARAM
-# define YYLEX yylex (&yylval, &yylloc, YYLEX_PARAM)
-#else
-# define YYLEX yylex (&yylval, &yylloc, info)
-#endif
+YY_ATTRIBUTE_UNUSED
+static unsigned
+yy_location_print_ (FILE *yyo, YYLTYPE const * const yylocp)
+{
+  unsigned res = 0;
+  int end_col = 0 != yylocp->last_column ? yylocp->last_column - 1 : 0;
+  if (0 <= yylocp->first_line)
+    {
+      res += YYFPRINTF (yyo, "%d", yylocp->first_line);
+      if (0 <= yylocp->first_column)
+        res += YYFPRINTF (yyo, ".%d", yylocp->first_column);
+    }
+  if (0 <= yylocp->last_line)
+    {
+      if (yylocp->first_line < yylocp->last_line)
+        {
+          res += YYFPRINTF (yyo, "-%d", yylocp->last_line);
+          if (0 <= end_col)
+            res += YYFPRINTF (yyo, ".%d", end_col);
+        }
+      else if (0 <= end_col && yylocp->first_column < end_col)
+        res += YYFPRINTF (yyo, "-%d", end_col);
+    }
+  return res;
+ }
 
-/* Enable debugging if requested.  */
-#if YYDEBUG
+#  define YY_LOCATION_PRINT(File, Loc)          \
+  yy_location_print_ (File, &(Loc))
 
-# ifndef YYFPRINTF
-#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
-#  define YYFPRINTF fprintf
+# else
+#  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 # endif
+#endif
 
-# define YYDPRINTF(Args)			\
-do {						\
-  if (yydebug)					\
-    YYFPRINTF Args;				\
-} while (YYID (0))
 
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location)			  \
-do {									  \
-  if (yydebug)								  \
-    {									  \
-      YYFPRINTF (stderr, "%s ", Title);					  \
-      yy_symbol_print (stderr,						  \
-		  Type, Value, Location, info); \
-      YYFPRINTF (stderr, "\n");						  \
-    }									  \
-} while (YYID (0))
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
+do {                                                                      \
+  if (yydebug)                                                            \
+    {                                                                     \
+      YYFPRINTF (stderr, "%s ", Title);                                   \
+      yy_symbol_print (stderr,                                            \
+                  Type, Value, Location, info); \
+      YYFPRINTF (stderr, "\n");                                           \
+    }                                                                     \
+} while (0)
 
 
-/*--------------------------------.
-| Print this symbol on YYOUTPUT.  |
-`--------------------------------*/
+/*----------------------------------------.
+| Print this symbol's value on YYOUTPUT.  |
+`----------------------------------------*/
 
-/*ARGSUSED*/
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
 yy_symbol_value_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep, YYLTYPE const * const yylocationp, DateInfo* info)
-#else
-static void
-yy_symbol_value_print (yyoutput, yytype, yyvaluep, yylocationp, info)
-    FILE *yyoutput;
-    int yytype;
-    YYSTYPE const * const yyvaluep;
-    YYLTYPE const * const yylocationp;
-    DateInfo* info;
-#endif
 {
-  if (!yyvaluep)
-    return;
+  FILE *yyo = yyoutput;
+  YYUSE (yyo);
   YYUSE (yylocationp);
   YYUSE (info);
+  if (!yyvaluep)
+    return;
 # ifdef YYPRINT
   if (yytype < YYNTOKENS)
     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
-# else
-  YYUSE (yyoutput);
 # endif
-  switch (yytype)
-    {
-      default:
-	break;
-    }
+  YYUSE (yytype);
 }
 
 
@@ -928,24 +929,11 @@ yy_symbol_value_print (yyoutput, yytype, yyvaluep, yylocationp, info)
 | Print this symbol on YYOUTPUT.  |
 `--------------------------------*/
 
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
 yy_symbol_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep, YYLTYPE const * const yylocationp, DateInfo* info)
-#else
-static void
-yy_symbol_print (yyoutput, yytype, yyvaluep, yylocationp, info)
-    FILE *yyoutput;
-    int yytype;
-    YYSTYPE const * const yyvaluep;
-    YYLTYPE const * const yylocationp;
-    DateInfo* info;
-#endif
 {
-  if (yytype < YYNTOKENS)
-    YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
-  else
-    YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
+  YYFPRINTF (yyoutput, "%s %s (",
+             yytype < YYNTOKENS ? "token" : "nterm", yytname[yytype]);
 
   YY_LOCATION_PRINT (yyoutput, *yylocationp);
   YYFPRINTF (yyoutput, ": ");
@@ -958,68 +946,54 @@ yy_symbol_print (yyoutput, yytype, yyvaluep, yylocationp, info)
 | TOP (included).                                                   |
 `------------------------------------------------------------------*/
 
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-static void
-yy_stack_print (yytype_int16 *bottom, yytype_int16 *top)
-#else
 static void
-yy_stack_print (bottom, top)
-    yytype_int16 *bottom;
-    yytype_int16 *top;
-#endif
+yy_stack_print (yytype_int16 *yybottom, yytype_int16 *yytop)
 {
   YYFPRINTF (stderr, "Stack now");
-  for (; bottom <= top; ++bottom)
-    YYFPRINTF (stderr, " %d", *bottom);
+  for (; yybottom <= yytop; yybottom++)
+    {
+      int yybot = *yybottom;
+      YYFPRINTF (stderr, " %d", yybot);
+    }
   YYFPRINTF (stderr, "\n");
 }
 
-# define YY_STACK_PRINT(Bottom, Top)				\
-do {								\
-  if (yydebug)							\
-    yy_stack_print ((Bottom), (Top));				\
-} while (YYID (0))
+# define YY_STACK_PRINT(Bottom, Top)                            \
+do {                                                            \
+  if (yydebug)                                                  \
+    yy_stack_print ((Bottom), (Top));                           \
+} while (0)
 
 
 /*------------------------------------------------.
 | Report that the YYRULE is going to be reduced.  |
 `------------------------------------------------*/
 
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
-yy_reduce_print (YYSTYPE *yyvsp, YYLTYPE *yylsp, int yyrule, DateInfo* info)
-#else
-static void
-yy_reduce_print (yyvsp, yylsp, yyrule, info)
-    YYSTYPE *yyvsp;
-    YYLTYPE *yylsp;
-    int yyrule;
-    DateInfo* info;
-#endif
+yy_reduce_print (yytype_int16 *yyssp, YYSTYPE *yyvsp, YYLTYPE *yylsp, int yyrule, DateInfo* info)
 {
+  unsigned long yylno = yyrline[yyrule];
   int yynrhs = yyr2[yyrule];
   int yyi;
-  unsigned long int yylno = yyrline[yyrule];
   YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
-	     yyrule - 1, yylno);
+             yyrule - 1, yylno);
   /* The symbols being reduced.  */
   for (yyi = 0; yyi < yynrhs; yyi++)
     {
-      fprintf (stderr, "   $%d = ", yyi + 1);
-      yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
-		       &(yyvsp[(yyi + 1) - (yynrhs)])
-		       , &(yylsp[(yyi + 1) - (yynrhs)])		       , info);
-      fprintf (stderr, "\n");
+      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
+      yy_symbol_print (stderr,
+                       yystos[yyssp[yyi + 1 - yynrhs]],
+                       &(yyvsp[(yyi + 1) - (yynrhs)])
+                       , &(yylsp[(yyi + 1) - (yynrhs)])                       , info);
+      YYFPRINTF (stderr, "\n");
     }
 }
 
-# define YY_REDUCE_PRINT(Rule)		\
-do {					\
-  if (yydebug)				\
-    yy_reduce_print (yyvsp, yylsp, Rule, info); \
-} while (YYID (0))
+# define YY_REDUCE_PRINT(Rule)          \
+do {                                    \
+  if (yydebug)                          \
+    yy_reduce_print (yyssp, yyvsp, yylsp, Rule, info); \
+} while (0)
 
 /* Nonzero means print parse trace.  It is left uninitialized so that
    multiple parsers can coexist.  */
@@ -1033,7 +1007,7 @@ int yydebug;
 
 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
-#ifndef	YYINITDEPTH
+#ifndef YYINITDEPTH
 # define YYINITDEPTH 200
 #endif
 
@@ -1048,7 +1022,6 @@ int yydebug;
 # define YYMAXDEPTH 10000
 #endif
 
-
 
 #if YYERROR_VERBOSE
 
@@ -1057,15 +1030,8 @@ int yydebug;
 #   define yystrlen strlen
 #  else
 /* Return the length of YYSTR.  */
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static YYSIZE_T
 yystrlen (const char *yystr)
-#else
-static YYSIZE_T
-yystrlen (yystr)
-    const char *yystr;
-#endif
 {
   YYSIZE_T yylen;
   for (yylen = 0; yystr[yylen]; yylen++)
@@ -1081,16 +1047,8 @@ yystrlen (yystr)
 #  else
 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
    YYDEST.  */
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static char *
 yystpcpy (char *yydest, const char *yysrc)
-#else
-static char *
-yystpcpy (yydest, yysrc)
-    char *yydest;
-    const char *yysrc;
-#endif
 {
   char *yyd = yydest;
   const char *yys = yysrc;
@@ -1120,27 +1078,27 @@ yytnamerr (char *yyres, const char *yystr)
       char const *yyp = yystr;
 
       for (;;)
-	switch (*++yyp)
-	  {
-	  case '\'':
-	  case ',':
-	    goto do_not_strip_quotes;
-
-	  case '\\':
-	    if (*++yyp != '\\')
-	      goto do_not_strip_quotes;
-	    /* Fall through.  */
-	  default:
-	    if (yyres)
-	      yyres[yyn] = *yyp;
-	    yyn++;
-	    break;
-
-	  case '"':
-	    if (yyres)
-	      yyres[yyn] = '\0';
-	    return yyn;
-	  }
+        switch (*++yyp)
+          {
+          case '\'':
+          case ',':
+            goto do_not_strip_quotes;
+
+          case '\\':
+            if (*++yyp != '\\')
+              goto do_not_strip_quotes;
+            /* Fall through.  */
+          default:
+            if (yyres)
+              yyres[yyn] = *yyp;
+            yyn++;
+            break;
+
+          case '"':
+            if (yyres)
+              yyres[yyn] = '\0';
+            return yyn;
+          }
     do_not_strip_quotes: ;
     }
 
@@ -1151,169 +1109,161 @@ yytnamerr (char *yyres, const char *yystr)
 }
 # endif
 
-/* Copy into YYRESULT an error message about the unexpected token
-   YYCHAR while in state YYSTATE.  Return the number of bytes copied,
-   including the terminating null byte.  If YYRESULT is null, do not
-   copy anything; just return the number of bytes that would be
-   copied.  As a special case, return 0 if an ordinary "syntax error"
-   message will do.  Return YYSIZE_MAXIMUM if overflow occurs during
-   size calculation.  */
-static YYSIZE_T
-yysyntax_error (char *yyresult, int yystate, int yychar)
+/* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
+   about the unexpected token YYTOKEN for the state stack whose top is
+   YYSSP.
+
+   Return 0 if *YYMSG was successfully written.  Return 1 if *YYMSG is
+   not large enough to hold the message.  In that case, also set
+   *YYMSG_ALLOC to the required number of bytes.  Return 2 if the
+   required number of bytes is too large to store.  */
+static int
+yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
+                yytype_int16 *yyssp, int yytoken)
 {
-  int yyn = yypact[yystate];
+  YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
+  YYSIZE_T yysize = yysize0;
+  enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+  /* Internationalized format string. */
+  const char *yyformat = YY_NULLPTR;
+  /* Arguments of yyformat. */
+  char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+  /* Number of reported tokens (one for the "unexpected", one per
+     "expected"). */
+  int yycount = 0;
+
+  /* There are many possibilities here to consider:
+     - If this state is a consistent state with a default action, then
+       the only way this function was invoked is if the default action
+       is an error action.  In that case, don't check for expected
+       tokens because there are none.
+     - The only way there can be no lookahead present (in yychar) is if
+       this state is a consistent state with a default action.  Thus,
+       detecting the absence of a lookahead is sufficient to determine
+       that there is no unexpected or expected token to report.  In that
+       case, just report a simple "syntax error".
+     - Don't assume there isn't a lookahead just because this state is a
+       consistent state with a default action.  There might have been a
+       previous inconsistent state, consistent state with a non-default
+       action, or user semantic action that manipulated yychar.
+     - Of course, the expected token list depends on states to have
+       correct lookahead information, and it depends on the parser not
+       to perform extra reductions after fetching a lookahead from the
+       scanner and before detecting a syntax error.  Thus, state merging
+       (from LALR or IELR) and default reductions corrupt the expected
+       token list.  However, the list is correct for canonical LR with
+       one exception: it will still contain any token that will not be
+       accepted due to an error action in a later state.
+  */
+  if (yytoken != YYEMPTY)
+    {
+      int yyn = yypact[*yyssp];
+      yyarg[yycount++] = yytname[yytoken];
+      if (!yypact_value_is_default (yyn))
+        {
+          /* Start YYX at -YYN if negative to avoid negative indexes in
+             YYCHECK.  In other words, skip the first -YYN actions for
+             this state because they are default actions.  */
+          int yyxbegin = yyn < 0 ? -yyn : 0;
+          /* Stay within bounds of both yycheck and yytname.  */
+          int yychecklim = YYLAST - yyn + 1;
+          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
+          int yyx;
+
+          for (yyx = yyxbegin; yyx < yyxend; ++yyx)
+            if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
+                && !yytable_value_is_error (yytable[yyx + yyn]))
+              {
+                if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+                  {
+                    yycount = 1;
+                    yysize = yysize0;
+                    break;
+                  }
+                yyarg[yycount++] = yytname[yyx];
+                {
+                  YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
+                  if (! (yysize <= yysize1
+                         && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+                    return 2;
+                  yysize = yysize1;
+                }
+              }
+        }
+    }
 
-  if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
-    return 0;
-  else
+  switch (yycount)
+    {
+# define YYCASE_(N, S)                      \
+      case N:                               \
+        yyformat = S;                       \
+      break
+    default: /* Avoid compiler warnings. */
+      YYCASE_(0, YY_("syntax error"));
+      YYCASE_(1, YY_("syntax error, unexpected %s"));
+      YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+      YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+      YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+      YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+# undef YYCASE_
+    }
+
+  {
+    YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
+    if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+      return 2;
+    yysize = yysize1;
+  }
+
+  if (*yymsg_alloc < yysize)
     {
-      int yytype = YYTRANSLATE (yychar);
-      YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]);
-      YYSIZE_T yysize = yysize0;
-      YYSIZE_T yysize1;
-      int yysize_overflow = 0;
-      enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
-      char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
-      int yyx;
-
-# if 0
-      /* This is so xgettext sees the translatable formats that are
-	 constructed on the fly.  */
-      YY_("syntax error, unexpected %s");
-      YY_("syntax error, unexpected %s, expecting %s");
-      YY_("syntax error, unexpected %s, expecting %s or %s");
-      YY_("syntax error, unexpected %s, expecting %s or %s or %s");
-      YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s");
-# endif
-      char *yyfmt;
-      char const *yyf;
-      static char const yyunexpected[] = "syntax error, unexpected %s";
-      static char const yyexpecting[] = ", expecting %s";
-      static char const yyor[] = " or %s";
-      char yyformat[sizeof yyunexpected
-		    + sizeof yyexpecting - 1
-		    + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
-		       * (sizeof yyor - 1))];
-      char const *yyprefix = yyexpecting;
-
-      /* Start YYX at -YYN if negative to avoid negative indexes in
-	 YYCHECK.  */
-      int yyxbegin = yyn < 0 ? -yyn : 0;
-
-      /* Stay within bounds of both yycheck and yytname.  */
-      int yychecklim = YYLAST - yyn + 1;
-      int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
-      int yycount = 1;
-
-      yyarg[0] = yytname[yytype];
-      yyfmt = yystpcpy (yyformat, yyunexpected);
-
-      for (yyx = yyxbegin; yyx < yyxend; ++yyx)
-	if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
-	  {
-	    if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
-	      {
-		yycount = 1;
-		yysize = yysize0;
-		yyformat[sizeof yyunexpected - 1] = '\0';
-		break;
-	      }
-	    yyarg[yycount++] = yytname[yyx];
-	    yysize1 = yysize + yytnamerr (0, yytname[yyx]);
-	    yysize_overflow |= (yysize1 < yysize);
-	    yysize = yysize1;
-	    yyfmt = yystpcpy (yyfmt, yyprefix);
-	    yyprefix = yyor;
-	  }
-
-      yyf = YY_(yyformat);
-      yysize1 = yysize + yystrlen (yyf);
-      yysize_overflow |= (yysize1 < yysize);
-      yysize = yysize1;
-
-      if (yysize_overflow)
-	return YYSIZE_MAXIMUM;
-
-      if (yyresult)
-	{
-	  /* Avoid sprintf, as that infringes on the user's name space.
-	     Don't have undefined behavior even if the translation
-	     produced a string with the wrong number of "%s"s.  */
-	  char *yyp = yyresult;
-	  int yyi = 0;
-	  while ((*yyp = *yyf) != '\0')
-	    {
-	      if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
-		{
-		  yyp += yytnamerr (yyp, yyarg[yyi++]);
-		  yyf += 2;
-		}
-	      else
-		{
-		  yyp++;
-		  yyf++;
-		}
-	    }
-	}
-      return yysize;
+      *yymsg_alloc = 2 * yysize;
+      if (! (yysize <= *yymsg_alloc
+             && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
+        *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
+      return 1;
     }
+
+  /* Avoid sprintf, as that infringes on the user's name space.
+     Don't have undefined behavior even if the translation
+     produced a string with the wrong number of "%s"s.  */
+  {
+    char *yyp = *yymsg;
+    int yyi = 0;
+    while ((*yyp = *yyformat) != '\0')
+      if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
+        {
+          yyp += yytnamerr (yyp, yyarg[yyi++]);
+          yyformat += 2;
+        }
+      else
+        {
+          yyp++;
+          yyformat++;
+        }
+  }
+  return 0;
 }
 #endif /* YYERROR_VERBOSE */
-
 
 /*-----------------------------------------------.
 | Release the memory associated to this symbol.  |
 `-----------------------------------------------*/
 
-/*ARGSUSED*/
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
 yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep, YYLTYPE *yylocationp, DateInfo* info)
-#else
-static void
-yydestruct (yymsg, yytype, yyvaluep, yylocationp, info)
-    const char *yymsg;
-    int yytype;
-    YYSTYPE *yyvaluep;
-    YYLTYPE *yylocationp;
-    DateInfo* info;
-#endif
 {
   YYUSE (yyvaluep);
   YYUSE (yylocationp);
   YYUSE (info);
-
   if (!yymsg)
     yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 
-  switch (yytype)
-    {
-
-      default:
-	break;
-    }
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  YYUSE (yytype);
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
 }
-
-
-/* Prevent warnings from -Wmissing-prototypes.  */
-
-#ifdef YYPARSE_PARAM
-#if defined __STDC__ || defined __cplusplus
-int yyparse (void *YYPARSE_PARAM);
-#else
-int yyparse ();
-#endif
-#else /* ! YYPARSE_PARAM */
-#if defined __STDC__ || defined __cplusplus
-int yyparse (DateInfo* info);
-#else
-int yyparse ();
-#endif
-#endif /* ! YYPARSE_PARAM */
-
-
 
 
 
@@ -1322,112 +1272,96 @@ int yyparse ();
 | yyparse.  |
 `----------*/
 
-#ifdef YYPARSE_PARAM
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-int
-yyparse (void *YYPARSE_PARAM)
-#else
-int
-yyparse (YYPARSE_PARAM)
-    void *YYPARSE_PARAM;
-#endif
-#else /* ! YYPARSE_PARAM */
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 int
 yyparse (DateInfo* info)
-#else
-int
-yyparse (info)
-    DateInfo* info;
-#endif
-#endif
 {
-  /* The look-ahead symbol.  */
+/* The lookahead symbol.  */
 int yychar;
 
-/* The semantic value of the look-ahead symbol.  */
-YYSTYPE yylval = {0};
 
-/* Number of syntax errors so far.  */
-int yynerrs;
-/* Location data for the look-ahead symbol.  */
-YYLTYPE yylloc;
+/* The semantic value of the lookahead symbol.  */
+/* Default value used for initialization, for pacifying older GCCs
+   or non-GCC compilers.  */
+YY_INITIAL_VALUE (static YYSTYPE yyval_default;)
+YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);
 
-  int yystate;
-  int yyn;
-  int yyresult;
-  /* Number of tokens to shift before error messages enabled.  */
-  int yyerrstatus;
-  /* Look-ahead token as an internal (translated) token number.  */
-  int yytoken = 0;
-#if YYERROR_VERBOSE
-  /* Buffer for error messages, and its allocated size.  */
-  char yymsgbuf[128];
-  char *yymsg = yymsgbuf;
-  YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
-#endif
+/* Location data for the lookahead symbol.  */
+static YYLTYPE yyloc_default
+# if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
+  = { 1, 1, 1, 1 }
+# endif
+;
+YYLTYPE yylloc = yyloc_default;
 
-  /* Three stacks and their tools:
-     `yyss': related to states,
-     `yyvs': related to semantic values,
-     `yyls': related to locations.
+    /* Number of syntax errors so far.  */
+    int yynerrs;
 
-     Refer to the stacks thru separate pointers, to allow yyoverflow
-     to reallocate them elsewhere.  */
+    int yystate;
+    /* Number of tokens to shift before error messages enabled.  */
+    int yyerrstatus;
 
-  /* The state stack.  */
-  yytype_int16 yyssa[YYINITDEPTH];
-  yytype_int16 *yyss = yyssa;
-  yytype_int16 *yyssp;
+    /* The stacks and their tools:
+       'yyss': related to states.
+       'yyvs': related to semantic values.
+       'yyls': related to locations.
 
-  /* The semantic value stack.  */
-  YYSTYPE yyvsa[YYINITDEPTH];
-  YYSTYPE *yyvs = yyvsa;
-  YYSTYPE *yyvsp;
+       Refer to the stacks through separate pointers, to allow yyoverflow
+       to reallocate them elsewhere.  */
 
-  /* The location stack.  */
-  YYLTYPE yylsa[YYINITDEPTH];
-  YYLTYPE *yyls = yylsa;
-  YYLTYPE *yylsp;
-  /* The locations where the error started and ended.  */
-  YYLTYPE yyerror_range[2];
+    /* The state stack.  */
+    yytype_int16 yyssa[YYINITDEPTH];
+    yytype_int16 *yyss;
+    yytype_int16 *yyssp;
 
-#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N), yylsp -= (N))
+    /* The semantic value stack.  */
+    YYSTYPE yyvsa[YYINITDEPTH];
+    YYSTYPE *yyvs;
+    YYSTYPE *yyvsp;
 
-  YYSIZE_T yystacksize = YYINITDEPTH;
+    /* The location stack.  */
+    YYLTYPE yylsa[YYINITDEPTH];
+    YYLTYPE *yyls;
+    YYLTYPE *yylsp;
 
+    /* The locations where the error started and ended.  */
+    YYLTYPE yyerror_range[3];
+
+    YYSIZE_T yystacksize;
+
+  int yyn;
+  int yyresult;
+  /* Lookahead token as an internal (translated) token number.  */
+  int yytoken = 0;
   /* The variables used to return semantic value and location from the
      action routines.  */
   YYSTYPE yyval;
   YYLTYPE yyloc;
 
+#if YYERROR_VERBOSE
+  /* Buffer for error messages, and its allocated size.  */
+  char yymsgbuf[128];
+  char *yymsg = yymsgbuf;
+  YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
+#endif
+
+#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N), yylsp -= (N))
+
   /* The number of symbols on the RHS of the reduced rule.
      Keep to zero when no symbol should be popped.  */
   int yylen = 0;
 
+  yyssp = yyss = yyssa;
+  yyvsp = yyvs = yyvsa;
+  yylsp = yyls = yylsa;
+  yystacksize = YYINITDEPTH;
+
   YYDPRINTF ((stderr, "Starting parse\n"));
 
   yystate = 0;
   yyerrstatus = 0;
   yynerrs = 0;
-  yychar = YYEMPTY;		/* Cause a token to be read.  */
-
-  /* Initialize stack pointers.
-     Waste one element of value and location stack
-     so that they stay on the same level as the state stack.
-     The wasted elements are never initialized.  */
-
-  yyssp = yyss;
-  yyvsp = yyvs;
-  yylsp = yyls;
-#if YYLTYPE_IS_TRIVIAL
-  /* Initialize the default location before parsing starts.  */
-  yylloc.first_line   = yylloc.last_line   = 1;
-  yylloc.first_column = yylloc.last_column = 0;
-#endif
-
+  yychar = YYEMPTY; /* Cause a token to be read.  */
+  yylsp[0] = yylloc;
   goto yysetstate;
 
 /*------------------------------------------------------------.
@@ -1448,25 +1382,26 @@ YYLTYPE yylloc;
 
 #ifdef yyoverflow
       {
-	/* Give user a chance to reallocate the stack.  Use copies of
-	   these so that the &'s don't force the real ones into
-	   memory.  */
-	YYSTYPE *yyvs1 = yyvs;
-	yytype_int16 *yyss1 = yyss;
-	YYLTYPE *yyls1 = yyls;
-
-	/* Each stack pointer address is followed by the size of the
-	   data in use in that stack, in bytes.  This used to be a
-	   conditional around just the two extra args, but that might
-	   be undefined if yyoverflow is a macro.  */
-	yyoverflow (YY_("memory exhausted"),
-		    &yyss1, yysize * sizeof (*yyssp),
-		    &yyvs1, yysize * sizeof (*yyvsp),
-		    &yyls1, yysize * sizeof (*yylsp),
-		    &yystacksize);
-	yyls = yyls1;
-	yyss = yyss1;
-	yyvs = yyvs1;
+        /* Give user a chance to reallocate the stack.  Use copies of
+           these so that the &'s don't force the real ones into
+           memory.  */
+        YYSTYPE *yyvs1 = yyvs;
+        yytype_int16 *yyss1 = yyss;
+        YYLTYPE *yyls1 = yyls;
+
+        /* Each stack pointer address is followed by the size of the
+           data in use in that stack, in bytes.  This used to be a
+           conditional around just the two extra args, but that might
+           be undefined if yyoverflow is a macro.  */
+        yyoverflow (YY_("memory exhausted"),
+                    &yyss1, yysize * sizeof (*yyssp),
+                    &yyvs1, yysize * sizeof (*yyvsp),
+                    &yyls1, yysize * sizeof (*yylsp),
+                    &yystacksize);
+
+        yyls = yyls1;
+        yyss = yyss1;
+        yyvs = yyvs1;
       }
 #else /* no yyoverflow */
 # ifndef YYSTACK_RELOCATE
@@ -1474,23 +1409,23 @@ YYLTYPE yylloc;
 # else
       /* Extend the stack our own way.  */
       if (YYMAXDEPTH <= yystacksize)
-	goto yyexhaustedlab;
+        goto yyexhaustedlab;
       yystacksize *= 2;
       if (YYMAXDEPTH < yystacksize)
-	yystacksize = YYMAXDEPTH;
+        yystacksize = YYMAXDEPTH;
 
       {
-	yytype_int16 *yyss1 = yyss;
-	union yyalloc *yyptr =
-	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
-	if (! yyptr)
-	  goto yyexhaustedlab;
-	YYSTACK_RELOCATE (yyss);
-	YYSTACK_RELOCATE (yyvs);
-	YYSTACK_RELOCATE (yyls);
+        yytype_int16 *yyss1 = yyss;
+        union yyalloc *yyptr =
+          (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
+        if (! yyptr)
+          goto yyexhaustedlab;
+        YYSTACK_RELOCATE (yyss_alloc, yyss);
+        YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+        YYSTACK_RELOCATE (yyls_alloc, yyls);
 #  undef YYSTACK_RELOCATE
-	if (yyss1 != yyssa)
-	  YYSTACK_FREE (yyss1);
+        if (yyss1 != yyssa)
+          YYSTACK_FREE (yyss1);
       }
 # endif
 #endif /* no yyoverflow */
@@ -1500,14 +1435,17 @@ YYLTYPE yylloc;
       yylsp = yyls + yysize - 1;
 
       YYDPRINTF ((stderr, "Stack size increased to %lu\n",
-		  (unsigned long int) yystacksize));
+                  (unsigned long) yystacksize));
 
       if (yyss + yystacksize - 1 <= yyssp)
-	YYABORT;
+        YYABORT;
     }
 
   YYDPRINTF ((stderr, "Entering state %d\n", yystate));
 
+  if (yystate == YYFINAL)
+    YYACCEPT;
+
   goto yybackup;
 
 /*-----------.
@@ -1516,20 +1454,20 @@ YYLTYPE yylloc;
 yybackup:
 
   /* Do appropriate processing given the current state.  Read a
-     look-ahead token if we need one and don't already have one.  */
+     lookahead token if we need one and don't already have one.  */
 
-  /* First try to decide what to do without reference to look-ahead token.  */
+  /* First try to decide what to do without reference to lookahead token.  */
   yyn = yypact[yystate];
-  if (yyn == YYPACT_NINF)
+  if (yypact_value_is_default (yyn))
     goto yydefault;
 
-  /* Not known => get a look-ahead token if don't already have one.  */
+  /* Not known => get a lookahead token if don't already have one.  */
 
-  /* YYCHAR is either YYEMPTY or YYEOF or a valid look-ahead symbol.  */
+  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
   if (yychar == YYEMPTY)
     {
       YYDPRINTF ((stderr, "Reading a token: "));
-      yychar = YYLEX;
+      yychar = yylex (&yylval, &yylloc, info);
     }
 
   if (yychar <= YYEOF)
@@ -1551,29 +1489,27 @@ yybackup:
   yyn = yytable[yyn];
   if (yyn <= 0)
     {
-      if (yyn == 0 || yyn == YYTABLE_NINF)
-	goto yyerrlab;
+      if (yytable_value_is_error (yyn))
+        goto yyerrlab;
       yyn = -yyn;
       goto yyreduce;
     }
 
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
   /* Count tokens shifted since error; after three, turn off error
      status.  */
   if (yyerrstatus)
     yyerrstatus--;
 
-  /* Shift the look-ahead token.  */
+  /* Shift the lookahead token.  */
   YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
 
-  /* Discard the shifted token unless it is eof.  */
-  if (yychar != YYEOF)
-    yychar = YYEMPTY;
+  /* Discard the shifted token.  */
+  yychar = YYEMPTY;
 
   yystate = yyn;
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
   *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
   *++yylsp = yylloc;
   goto yynewstate;
 
@@ -1596,7 +1532,7 @@ yyreduce:
   yylen = yyr2[yyn];
 
   /* If YYLEN is nonzero, implement the default value of the action:
-     `$$ = $1'.
+     '$$ = $1'.
 
      Otherwise, the following line sets YYVAL to garbage.
      This behavior is undocumented and Bison
@@ -1605,8 +1541,9 @@ yyreduce:
      GCC warning that YYVAL may be used uninitialized.  */
   yyval = yyvsp[1-yylen];
 
-  /* Default location.  */
+  /* Default location. */
   YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);
+  yyerror_range[1] = yyloc;
   YY_REDUCE_PRINT (yyn);
   switch (yyn)
     {
@@ -1614,42 +1551,48 @@ yyreduce:
 
     {
 	    yyHaveTime++;
-	;}
+	}
+
     break;
 
   case 5:
 
     {
 	    yyHaveZone++;
-	;}
+	}
+
     break;
 
   case 6:
 
     {
 	    yyHaveDate++;
-	;}
+	}
+
     break;
 
   case 7:
 
     {
 	    yyHaveOrdinalMonth++;
-	;}
+	}
+
     break;
 
   case 8:
 
     {
 	    yyHaveDay++;
-	;}
+	}
+
     break;
 
   case 9:
 
     {
 	    yyHaveRel++;
-	;}
+	}
+
     break;
 
   case 10:
@@ -1657,7 +1600,8 @@ yyreduce:
     {
 	    yyHaveTime++;
 	    yyHaveDate++;
-	;}
+	}
+
     break;
 
   case 11:
@@ -1666,195 +1610,217 @@ yyreduce:
 	    yyHaveTime++;
 	    yyHaveDate++;
 	    yyHaveRel++;
-	;}
+	}
+
     break;
 
   case 13:
 
     {
-	    yyHour = (yyvsp[(1) - (2)].Number);
+	    yyHour = (yyvsp[-1].Number);
 	    yyMinutes = 0;
 	    yySeconds = 0;
-	    yyMeridian = (yyvsp[(2) - (2)].Meridian);
-	;}
+	    yyMeridian = (yyvsp[0].Meridian);
+	}
+
     break;
 
   case 14:
 
     {
-	    yyHour = (yyvsp[(1) - (4)].Number);
-	    yyMinutes = (yyvsp[(3) - (4)].Number);
+	    yyHour = (yyvsp[-3].Number);
+	    yyMinutes = (yyvsp[-1].Number);
 	    yySeconds = 0;
-	    yyMeridian = (yyvsp[(4) - (4)].Meridian);
-	;}
+	    yyMeridian = (yyvsp[0].Meridian);
+	}
+
     break;
 
   case 15:
 
     {
-	    yyHour = (yyvsp[(1) - (5)].Number);
-	    yyMinutes = (yyvsp[(3) - (5)].Number);
+	    yyHour = (yyvsp[-4].Number);
+	    yyMinutes = (yyvsp[-2].Number);
 	    yyMeridian = MER24;
 	    yyDSTmode = DSToff;
-	    yyTimezone = ((yyvsp[(5) - (5)].Number) % 100 + ((yyvsp[(5) - (5)].Number) / 100) * 60);
+	    yyTimezone = ((yyvsp[0].Number) % 100 + ((yyvsp[0].Number) / 100) * 60);
 	    ++yyHaveZone;
-	;}
+	}
+
     break;
 
   case 16:
 
     {
-	    yyHour = (yyvsp[(1) - (6)].Number);
-	    yyMinutes = (yyvsp[(3) - (6)].Number);
-	    yySeconds = (yyvsp[(5) - (6)].Number);
-	    yyMeridian = (yyvsp[(6) - (6)].Meridian);
-	;}
+	    yyHour = (yyvsp[-5].Number);
+	    yyMinutes = (yyvsp[-3].Number);
+	    yySeconds = (yyvsp[-1].Number);
+	    yyMeridian = (yyvsp[0].Meridian);
+	}
+
     break;
 
   case 17:
 
     {
-	    yyHour = (yyvsp[(1) - (7)].Number);
-	    yyMinutes = (yyvsp[(3) - (7)].Number);
-	    yySeconds = (yyvsp[(5) - (7)].Number);
+	    yyHour = (yyvsp[-6].Number);
+	    yyMinutes = (yyvsp[-4].Number);
+	    yySeconds = (yyvsp[-2].Number);
 	    yyMeridian = MER24;
 	    yyDSTmode = DSToff;
-	    yyTimezone = ((yyvsp[(7) - (7)].Number) % 100 + ((yyvsp[(7) - (7)].Number) / 100) * 60);
+	    yyTimezone = ((yyvsp[0].Number) % 100 + ((yyvsp[0].Number) / 100) * 60);
 	    ++yyHaveZone;
-	;}
+	}
+
     break;
 
   case 18:
 
     {
-	    yyTimezone = (yyvsp[(1) - (2)].Number);
+	    yyTimezone = (yyvsp[-1].Number);
 	    yyDSTmode = DSTon;
-	;}
+	}
+
     break;
 
   case 19:
 
     {
-	    yyTimezone = (yyvsp[(1) - (1)].Number);
+	    yyTimezone = (yyvsp[0].Number);
 	    yyDSTmode = DSToff;
-	;}
+	}
+
     break;
 
   case 20:
 
     {
-	    yyTimezone = (yyvsp[(1) - (1)].Number);
+	    yyTimezone = (yyvsp[0].Number);
 	    yyDSTmode = DSTon;
-	;}
+	}
+
     break;
 
   case 21:
 
     {
 	    yyDayOrdinal = 1;
-	    yyDayNumber = (yyvsp[(1) - (1)].Number);
-	;}
+	    yyDayNumber = (yyvsp[0].Number);
+	}
+
     break;
 
   case 22:
 
     {
 	    yyDayOrdinal = 1;
-	    yyDayNumber = (yyvsp[(1) - (2)].Number);
-	;}
+	    yyDayNumber = (yyvsp[-1].Number);
+	}
+
     break;
 
   case 23:
 
     {
-	    yyDayOrdinal = (yyvsp[(1) - (2)].Number);
-	    yyDayNumber = (yyvsp[(2) - (2)].Number);
-	;}
+	    yyDayOrdinal = (yyvsp[-1].Number);
+	    yyDayNumber = (yyvsp[0].Number);
+	}
+
     break;
 
   case 24:
 
     {
-	    yyDayOrdinal = (yyvsp[(1) - (3)].Number) * (yyvsp[(2) - (3)].Number);
-	    yyDayNumber = (yyvsp[(3) - (3)].Number);
-	;}
+	    yyDayOrdinal = (yyvsp[-2].Number) * (yyvsp[-1].Number);
+	    yyDayNumber = (yyvsp[0].Number);
+	}
+
     break;
 
   case 25:
 
     {
 	    yyDayOrdinal = 2;
-	    yyDayNumber = (yyvsp[(2) - (2)].Number);
-	;}
+	    yyDayNumber = (yyvsp[0].Number);
+	}
+
     break;
 
   case 26:
 
     {
-	    yyMonth = (yyvsp[(1) - (3)].Number);
-	    yyDay = (yyvsp[(3) - (3)].Number);
-	;}
+	    yyMonth = (yyvsp[-2].Number);
+	    yyDay = (yyvsp[0].Number);
+	}
+
     break;
 
   case 27:
 
     {
-	    yyMonth = (yyvsp[(1) - (5)].Number);
-	    yyDay = (yyvsp[(3) - (5)].Number);
-	    yyYear = (yyvsp[(5) - (5)].Number);
-	;}
+	    yyMonth = (yyvsp[-4].Number);
+	    yyDay = (yyvsp[-2].Number);
+	    yyYear = (yyvsp[0].Number);
+	}
+
     break;
 
   case 28:
 
     {
-	    yyYear = (yyvsp[(1) - (1)].Number) / 10000;
-	    yyMonth = ((yyvsp[(1) - (1)].Number) % 10000)/100;
-	    yyDay = (yyvsp[(1) - (1)].Number) % 100;
-	;}
+	    yyYear = (yyvsp[0].Number) / 10000;
+	    yyMonth = ((yyvsp[0].Number) % 10000)/100;
+	    yyDay = (yyvsp[0].Number) % 100;
+	}
+
     break;
 
   case 29:
 
     {
-	    yyDay = (yyvsp[(1) - (5)].Number);
-	    yyMonth = (yyvsp[(3) - (5)].Number);
-	    yyYear = (yyvsp[(5) - (5)].Number);
-	;}
+	    yyDay = (yyvsp[-4].Number);
+	    yyMonth = (yyvsp[-2].Number);
+	    yyYear = (yyvsp[0].Number);
+	}
+
     break;
 
   case 30:
 
     {
-	    yyMonth = (yyvsp[(3) - (5)].Number);
-	    yyDay = (yyvsp[(5) - (5)].Number);
-	    yyYear = (yyvsp[(1) - (5)].Number);
-	;}
+	    yyMonth = (yyvsp[-2].Number);
+	    yyDay = (yyvsp[0].Number);
+	    yyYear = (yyvsp[-4].Number);
+	}
+
     break;
 
   case 31:
 
     {
-	    yyMonth = (yyvsp[(1) - (2)].Number);
-	    yyDay = (yyvsp[(2) - (2)].Number);
-	;}
+	    yyMonth = (yyvsp[-1].Number);
+	    yyDay = (yyvsp[0].Number);
+	}
+
     break;
 
   case 32:
 
     {
-	    yyMonth = (yyvsp[(1) - (4)].Number);
-	    yyDay = (yyvsp[(2) - (4)].Number);
-	    yyYear = (yyvsp[(4) - (4)].Number);
-	;}
+	    yyMonth = (yyvsp[-3].Number);
+	    yyDay = (yyvsp[-2].Number);
+	    yyYear = (yyvsp[0].Number);
+	}
+
     break;
 
   case 33:
 
     {
-	    yyMonth = (yyvsp[(2) - (2)].Number);
-	    yyDay = (yyvsp[(1) - (2)].Number);
-	;}
+	    yyMonth = (yyvsp[0].Number);
+	    yyDay = (yyvsp[-1].Number);
+	}
+
     break;
 
   case 34:
@@ -1863,70 +1829,77 @@ yyreduce:
 	    yyMonth = 1;
 	    yyDay = 1;
 	    yyYear = EPOCH;
-	;}
+	}
+
     break;
 
   case 35:
 
     {
-	    yyMonth = (yyvsp[(2) - (3)].Number);
-	    yyDay = (yyvsp[(1) - (3)].Number);
-	    yyYear = (yyvsp[(3) - (3)].Number);
-	;}
+	    yyMonth = (yyvsp[-1].Number);
+	    yyDay = (yyvsp[-2].Number);
+	    yyYear = (yyvsp[0].Number);
+	}
+
     break;
 
   case 36:
 
     {
 	    yyMonthOrdinal = 1;
-	    yyMonth = (yyvsp[(2) - (2)].Number);
-	;}
+	    yyMonth = (yyvsp[0].Number);
+	}
+
     break;
 
   case 37:
 
     {
-	    yyMonthOrdinal = (yyvsp[(2) - (3)].Number);
-	    yyMonth = (yyvsp[(3) - (3)].Number);
-	;}
+	    yyMonthOrdinal = (yyvsp[-1].Number);
+	    yyMonth = (yyvsp[0].Number);
+	}
+
     break;
 
   case 38:
 
     {
-	    if ((yyvsp[(2) - (3)].Number) != HOUR( 7)) YYABORT;
-	    yyYear = (yyvsp[(1) - (3)].Number) / 10000;
-	    yyMonth = ((yyvsp[(1) - (3)].Number) % 10000)/100;
-	    yyDay = (yyvsp[(1) - (3)].Number) % 100;
-	    yyHour = (yyvsp[(3) - (3)].Number) / 10000;
-	    yyMinutes = ((yyvsp[(3) - (3)].Number) % 10000)/100;
-	    yySeconds = (yyvsp[(3) - (3)].Number) % 100;
-	;}
+	    if ((yyvsp[-1].Number) != HOUR( 7)) YYABORT;
+	    yyYear = (yyvsp[-2].Number) / 10000;
+	    yyMonth = ((yyvsp[-2].Number) % 10000)/100;
+	    yyDay = (yyvsp[-2].Number) % 100;
+	    yyHour = (yyvsp[0].Number) / 10000;
+	    yyMinutes = ((yyvsp[0].Number) % 10000)/100;
+	    yySeconds = (yyvsp[0].Number) % 100;
+	}
+
     break;
 
   case 39:
 
     {
-	    if ((yyvsp[(2) - (7)].Number) != HOUR( 7)) YYABORT;
-	    yyYear = (yyvsp[(1) - (7)].Number) / 10000;
-	    yyMonth = ((yyvsp[(1) - (7)].Number) % 10000)/100;
-	    yyDay = (yyvsp[(1) - (7)].Number) % 100;
-	    yyHour = (yyvsp[(3) - (7)].Number);
-	    yyMinutes = (yyvsp[(5) - (7)].Number);
-	    yySeconds = (yyvsp[(7) - (7)].Number);
-	;}
+	    if ((yyvsp[-5].Number) != HOUR( 7)) YYABORT;
+	    yyYear = (yyvsp[-6].Number) / 10000;
+	    yyMonth = ((yyvsp[-6].Number) % 10000)/100;
+	    yyDay = (yyvsp[-6].Number) % 100;
+	    yyHour = (yyvsp[-4].Number);
+	    yyMinutes = (yyvsp[-2].Number);
+	    yySeconds = (yyvsp[0].Number);
+	}
+
     break;
 
   case 40:
 
     {
-	    yyYear = (yyvsp[(1) - (2)].Number) / 10000;
-	    yyMonth = ((yyvsp[(1) - (2)].Number) % 10000)/100;
-	    yyDay = (yyvsp[(1) - (2)].Number) % 100;
-	    yyHour = (yyvsp[(2) - (2)].Number) / 10000;
-	    yyMinutes = ((yyvsp[(2) - (2)].Number) % 10000)/100;
-	    yySeconds = (yyvsp[(2) - (2)].Number) % 100;
-	;}
+	    yyYear = (yyvsp[-1].Number) / 10000;
+	    yyMonth = ((yyvsp[-1].Number) % 10000)/100;
+	    yyDay = (yyvsp[-1].Number) % 100;
+	    yyHour = (yyvsp[0].Number) / 10000;
+	    yyMinutes = ((yyvsp[0].Number) % 10000)/100;
+	    yySeconds = (yyvsp[0].Number) % 100;
+	}
+
     break;
 
   case 41:
@@ -1937,12 +1910,13 @@ yyreduce:
 	     * in a range accessible with a 32 bit clock seconds value.
 	     */
 
-	    yyYear = (yyvsp[(2) - (4)].Number)/1000 + 2323 - 377;
+	    yyYear = (yyvsp[-2].Number)/1000 + 2323 - 377;
 	    yyDay  = 1;
 	    yyMonth = 1;
-	    yyRelDay += (((yyvsp[(2) - (4)].Number)%1000)*(365 + IsLeapYear(yyYear)))/1000;
-	    yyRelSeconds += (yyvsp[(4) - (4)].Number) * 144 * 60;
-	;}
+	    yyRelDay += (((yyvsp[-2].Number)%1000)*(365 + IsLeapYear(yyYear)))/1000;
+	    yyRelSeconds += (yyvsp[0].Number) * 144 * 60;
+	}
+
     break;
 
   case 42:
@@ -1951,121 +1925,145 @@ yyreduce:
 	    yyRelSeconds *= -1;
 	    yyRelMonth *= -1;
 	    yyRelDay *= -1;
-	;}
+	}
+
     break;
 
   case 44:
 
     {
-	    *yyRelPointer += (yyvsp[(1) - (3)].Number) * (yyvsp[(2) - (3)].Number) * (yyvsp[(3) - (3)].Number);
-	;}
+	    *yyRelPointer += (yyvsp[-2].Number) * (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+
     break;
 
   case 45:
 
     {
-	    *yyRelPointer += (yyvsp[(1) - (2)].Number) * (yyvsp[(2) - (2)].Number);
-	;}
+	    *yyRelPointer += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+
     break;
 
   case 46:
 
     {
-	    *yyRelPointer += (yyvsp[(2) - (2)].Number);
-	;}
+	    *yyRelPointer += (yyvsp[0].Number);
+	}
+
     break;
 
   case 47:
 
     {
-	    *yyRelPointer += (yyvsp[(2) - (3)].Number) * (yyvsp[(3) - (3)].Number);
-	;}
+	    *yyRelPointer += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+
     break;
 
   case 48:
 
     {
-	    *yyRelPointer += (yyvsp[(1) - (1)].Number);
-	;}
+	    *yyRelPointer += (yyvsp[0].Number);
+	}
+
     break;
 
   case 49:
 
     {
 	    (yyval.Number) = -1;
-	;}
+	}
+
     break;
 
   case 50:
 
     {
 	    (yyval.Number) =  1;
-	;}
+	}
+
     break;
 
   case 51:
 
     {
-	    (yyval.Number) = (yyvsp[(1) - (1)].Number);
+	    (yyval.Number) = (yyvsp[0].Number);
 	    yyRelPointer = &yyRelSeconds;
-	;}
+	}
+
     break;
 
   case 52:
 
     {
-	    (yyval.Number) = (yyvsp[(1) - (1)].Number);
+	    (yyval.Number) = (yyvsp[0].Number);
 	    yyRelPointer = &yyRelDay;
-	;}
+	}
+
     break;
 
   case 53:
 
     {
-	    (yyval.Number) = (yyvsp[(1) - (1)].Number);
+	    (yyval.Number) = (yyvsp[0].Number);
 	    yyRelPointer = &yyRelMonth;
-	;}
+	}
+
     break;
 
   case 54:
 
     {
 	    if (yyHaveTime && yyHaveDate && !yyHaveRel) {
-		yyYear = (yyvsp[(1) - (1)].Number);
+		yyYear = (yyvsp[0].Number);
 	    } else {
 		yyHaveTime++;
 		if (yyDigitCount <= 2) {
-		    yyHour = (yyvsp[(1) - (1)].Number);
+		    yyHour = (yyvsp[0].Number);
 		    yyMinutes = 0;
 		} else {
-		    yyHour = (yyvsp[(1) - (1)].Number) / 100;
-		    yyMinutes = (yyvsp[(1) - (1)].Number) % 100;
+		    yyHour = (yyvsp[0].Number) / 100;
+		    yyMinutes = (yyvsp[0].Number) % 100;
 		}
 		yySeconds = 0;
 		yyMeridian = MER24;
 	    }
-	;}
+	}
+
     break;
 
   case 55:
 
     {
 	    (yyval.Meridian) = MER24;
-	;}
+	}
+
     break;
 
   case 56:
 
     {
-	    (yyval.Meridian) = (yyvsp[(1) - (1)].Meridian);
-	;}
+	    (yyval.Meridian) = (yyvsp[0].Meridian);
+	}
+
     break;
 
 
-/* Line 1267 of yacc.c.  */
 
       default: break;
     }
+  /* User semantic actions sometimes alter yychar, and that requires
+     that yytoken be updated with the new translation.  We take the
+     approach of translating immediately before every use of yytoken.
+     One alternative is translating here after every semantic action,
+     but that translation would be missed if the semantic action invokes
+     YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
+     if it invokes YYBACKUP.  In the case of YYABORT or YYACCEPT, an
+     incorrect destructor might then be invoked immediately.  In the
+     case of YYERROR or YYBACKUP, subsequent parser actions might lead
+     to an incorrect destructor call or verbose syntax error message
+     before the lookahead is translated.  */
   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
 
   YYPOPSTACK (yylen);
@@ -2075,7 +2073,7 @@ yyreduce:
   *++yyvsp = yyval;
   *++yylsp = yyloc;
 
-  /* Now `shift' the result of the reduction.  Determine what state
+  /* Now 'shift' the result of the reduction.  Determine what state
      that goes to, based on the state we popped back to and the rule
      number reduced by.  */
 
@@ -2090,10 +2088,14 @@ yyreduce:
   goto yynewstate;
 
 
-/*------------------------------------.
-| yyerrlab -- here on detecting error |
-`------------------------------------*/
+/*--------------------------------------.
+| yyerrlab -- here on detecting error.  |
+`--------------------------------------*/
 yyerrlab:
+  /* Make sure we have latest lookahead translation.  See comments at
+     user semantic actions for why this is necessary.  */
+  yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
+
   /* If not already recovering from an error, report this error.  */
   if (!yyerrstatus)
     {
@@ -2101,62 +2103,61 @@ yyerrlab:
 #if ! YYERROR_VERBOSE
       yyerror (&yylloc, info, YY_("syntax error"));
 #else
+# define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \
+                                        yyssp, yytoken)
       {
-	YYSIZE_T yysize = yysyntax_error (0, yystate, yychar);
-	if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM)
-	  {
-	    YYSIZE_T yyalloc = 2 * yysize;
-	    if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM))
-	      yyalloc = YYSTACK_ALLOC_MAXIMUM;
-	    if (yymsg != yymsgbuf)
-	      YYSTACK_FREE (yymsg);
-	    yymsg = (char *) YYSTACK_ALLOC (yyalloc);
-	    if (yymsg)
-	      yymsg_alloc = yyalloc;
-	    else
-	      {
-		yymsg = yymsgbuf;
-		yymsg_alloc = sizeof yymsgbuf;
-	      }
-	  }
-
-	if (0 < yysize && yysize <= yymsg_alloc)
-	  {
-	    (void) yysyntax_error (yymsg, yystate, yychar);
-	    yyerror (&yylloc, info, yymsg);
-	  }
-	else
-	  {
-	    yyerror (&yylloc, info, YY_("syntax error"));
-	    if (yysize != 0)
-	      goto yyexhaustedlab;
-	  }
+        char const *yymsgp = YY_("syntax error");
+        int yysyntax_error_status;
+        yysyntax_error_status = YYSYNTAX_ERROR;
+        if (yysyntax_error_status == 0)
+          yymsgp = yymsg;
+        else if (yysyntax_error_status == 1)
+          {
+            if (yymsg != yymsgbuf)
+              YYSTACK_FREE (yymsg);
+            yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
+            if (!yymsg)
+              {
+                yymsg = yymsgbuf;
+                yymsg_alloc = sizeof yymsgbuf;
+                yysyntax_error_status = 2;
+              }
+            else
+              {
+                yysyntax_error_status = YYSYNTAX_ERROR;
+                yymsgp = yymsg;
+              }
+          }
+        yyerror (&yylloc, info, yymsgp);
+        if (yysyntax_error_status == 2)
+          goto yyexhaustedlab;
       }
+# undef YYSYNTAX_ERROR
 #endif
     }
 
-  yyerror_range[0] = yylloc;
+  yyerror_range[1] = yylloc;
 
   if (yyerrstatus == 3)
     {
-      /* If just tried and failed to reuse look-ahead token after an
-	 error, discard it.  */
+      /* If just tried and failed to reuse lookahead token after an
+         error, discard it.  */
 
       if (yychar <= YYEOF)
-	{
-	  /* Return failure if at end of input.  */
-	  if (yychar == YYEOF)
-	    YYABORT;
-	}
+        {
+          /* Return failure if at end of input.  */
+          if (yychar == YYEOF)
+            YYABORT;
+        }
       else
-	{
-	  yydestruct ("Error: discarding",
-		      yytoken, &yylval, &yylloc, info);
-	  yychar = YYEMPTY;
-	}
+        {
+          yydestruct ("Error: discarding",
+                      yytoken, &yylval, &yylloc, info);
+          yychar = YYEMPTY;
+        }
     }
 
-  /* Else will try to reuse look-ahead token after shifting the error
+  /* Else will try to reuse lookahead token after shifting the error
      token.  */
   goto yyerrlab1;
 
@@ -2172,8 +2173,7 @@ yyerrorlab:
   if (/*CONSTCOND*/ 0)
      goto yyerrorlab;
 
-  yyerror_range[0] = yylsp[1-yylen];
-  /* Do not reclaim the symbols of the rule which action triggered
+  /* Do not reclaim the symbols of the rule whose action triggered
      this YYERROR.  */
   YYPOPSTACK (yylen);
   yylen = 0;
@@ -2186,43 +2186,42 @@ yyerrorlab:
 | yyerrlab1 -- common code for both syntax error and YYERROR.  |
 `-------------------------------------------------------------*/
 yyerrlab1:
-  yyerrstatus = 3;	/* Each real token shifted decrements this.  */
+  yyerrstatus = 3;      /* Each real token shifted decrements this.  */
 
   for (;;)
     {
       yyn = yypact[yystate];
-      if (yyn != YYPACT_NINF)
-	{
-	  yyn += YYTERROR;
-	  if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
-	    {
-	      yyn = yytable[yyn];
-	      if (0 < yyn)
-		break;
-	    }
-	}
+      if (!yypact_value_is_default (yyn))
+        {
+          yyn += YYTERROR;
+          if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
+            {
+              yyn = yytable[yyn];
+              if (0 < yyn)
+                break;
+            }
+        }
 
       /* Pop the current state because it cannot handle the error token.  */
       if (yyssp == yyss)
-	YYABORT;
+        YYABORT;
 
-      yyerror_range[0] = *yylsp;
+      yyerror_range[1] = *yylsp;
       yydestruct ("Error: popping",
-		  yystos[yystate], yyvsp, yylsp, info);
+                  yystos[yystate], yyvsp, yylsp, info);
       YYPOPSTACK (1);
       yystate = *yyssp;
       YY_STACK_PRINT (yyss, yyssp);
     }
 
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
   *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
 
-  yyerror_range[1] = yylloc;
+  yyerror_range[2] = yylloc;
   /* Using YYLLOC is tempting, but would change the location of
-     the look-ahead.  YYLOC is available though.  */
-  YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
+     the lookahead.  YYLOC is available though.  */
+  YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
   *++yylsp = yyloc;
 
   /* Shift the error token.  */
@@ -2246,7 +2245,7 @@ yyabortlab:
   yyresult = 1;
   goto yyreturn;
 
-#ifndef yyoverflow
+#if !defined yyoverflow || YYERROR_VERBOSE
 /*-------------------------------------------------.
 | yyexhaustedlab -- memory exhaustion comes here.  |
 `-------------------------------------------------*/
@@ -2257,17 +2256,22 @@ yyexhaustedlab:
 #endif
 
 yyreturn:
-  if (yychar != YYEOF && yychar != YYEMPTY)
-     yydestruct ("Cleanup: discarding lookahead",
-		 yytoken, &yylval, &yylloc, info);
-  /* Do not reclaim the symbols of the rule which action triggered
+  if (yychar != YYEMPTY)
+    {
+      /* Make sure we have latest lookahead translation.  See comments at
+         user semantic actions for why this is necessary.  */
+      yytoken = YYTRANSLATE (yychar);
+      yydestruct ("Cleanup: discarding lookahead",
+                  yytoken, &yylval, &yylloc, info);
+    }
+  /* Do not reclaim the symbols of the rule whose action triggered
      this YYABORT or YYACCEPT.  */
   YYPOPSTACK (yylen);
   YY_STACK_PRINT (yyss, yyssp);
   while (yyssp != yyss)
     {
       yydestruct ("Cleanup: popping",
-		  yystos[*yyssp], yyvsp, yylsp, info);
+                  yystos[*yyssp], yyvsp, yylsp, info);
       YYPOPSTACK (1);
     }
 #ifndef yyoverflow
@@ -2278,13 +2282,10 @@ yyreturn:
   if (yymsg != yymsgbuf)
     YYSTACK_FREE (yymsg);
 #endif
-  /* Make sure YYID is used.  */
-  return YYID (yyresult);
+  return yyresult;
 }
 
 
-
-
 /*
  * Month and day table.
  */
@@ -2680,7 +2681,7 @@ TclDatelex(
 
     location->first_column = yyInput - info->dateStart;
     for ( ; ; ) {
-	while (TclIsSpaceProc(*yyInput)) {
+	while (TclIsSpaceProc(UCHAR(*yyInput))) {
 	    yyInput++;
 	}
 
@@ -2911,4 +2912,3 @@ TclClockOldscanObjCmd(
  * fill-column: 78
  * End:
  */
-
diff --git a/generic/tclDecls.h b/generic/tclDecls.h
index 7732ae6..e20782e 100644
--- a/generic/tclDecls.h
+++ b/generic/tclDecls.h
@@ -1862,6 +1862,19 @@ EXTERN Tcl_Channel	Tcl_OpenTcpServerEx(Tcl_Interp *interp,
 				unsigned int flags,
 				Tcl_TcpAcceptProc *acceptProc,
 				ClientData callbackData);
+/* 632 */
+EXTERN int		TclZipfs_Mount(Tcl_Interp *interp,
+				const char *mountPoint, const char *zipname,
+				const char *passwd);
+/* 633 */
+EXTERN int		TclZipfs_Unmount(Tcl_Interp *interp,
+				const char *mountPoint);
+/* 634 */
+EXTERN Tcl_Obj *	TclZipfs_TclLibrary(void);
+/* 635 */
+EXTERN int		TclZipfs_MountBuffer(Tcl_Interp *interp,
+				const char *mountPoint, unsigned char *data,
+				size_t datalen, int copy);
 
 typedef struct {
     const struct TclPlatStubs *tclPlatStubs;
@@ -2529,6 +2542,10 @@ typedef struct TclStubs {
     int (*tcl_FSUnloadFile) (Tcl_Interp *interp, Tcl_LoadHandle handlePtr); /* 629 */
     void (*tcl_ZlibStreamSetCompressionDictionary) (Tcl_ZlibStream zhandle, Tcl_Obj *compressionDictionaryObj); /* 630 */
     Tcl_Channel (*tcl_OpenTcpServerEx) (Tcl_Interp *interp, const char *service, const char *host, unsigned int flags, Tcl_TcpAcceptProc *acceptProc, ClientData callbackData); /* 631 */
+    int (*tclZipfs_Mount) (Tcl_Interp *interp, const char *mountPoint, const char *zipname, const char *passwd); /* 632 */
+    int (*tclZipfs_Unmount) (Tcl_Interp *interp, const char *mountPoint); /* 633 */
+    Tcl_Obj * (*tclZipfs_TclLibrary) (void); /* 634 */
+    int (*tclZipfs_MountBuffer) (Tcl_Interp *interp, const char *mountPoint, unsigned char *data, size_t datalen, int copy); /* 635 */
 } TclStubs;
 
 extern const TclStubs *tclStubsPtr;
@@ -3823,6 +3840,14 @@ extern const TclStubs *tclStubsPtr;
 	(tclStubsPtr->tcl_ZlibStreamSetCompressionDictionary) /* 630 */
 #define Tcl_OpenTcpServerEx \
 	(tclStubsPtr->tcl_OpenTcpServerEx) /* 631 */
+#define TclZipfs_Mount \
+	(tclStubsPtr->tclZipfs_Mount) /* 632 */
+#define TclZipfs_Unmount \
+	(tclStubsPtr->tclZipfs_Unmount) /* 633 */
+#define TclZipfs_TclLibrary \
+	(tclStubsPtr->tclZipfs_TclLibrary) /* 634 */
+#define TclZipfs_MountBuffer \
+	(tclStubsPtr->tclZipfs_MountBuffer) /* 635 */
 
 #endif /* defined(USE_TCL_STUBS) */
 
@@ -3849,6 +3874,7 @@ extern const TclStubs *tclStubsPtr;
 #   define Tcl_MainEx Tcl_MainExW
     EXTERN void Tcl_MainExW(int argc, wchar_t **argv,
 	    Tcl_AppInitProc *appInitProc, Tcl_Interp *interp);
+    EXTERN int		TclZipfs_AppHook(int *argc, wchar_t ***argv);
 #endif
 
 #undef TCL_STORAGE_CLASS
diff --git a/generic/tclEncoding.c b/generic/tclEncoding.c
index f6744e9..d5e8c9a 100644
--- a/generic/tclEncoding.c
+++ b/generic/tclEncoding.c
@@ -2058,7 +2058,7 @@ LoadEscapeEncoding(
     dataPtr->numSubTables =
 	    Tcl_DStringLength(&escapeData) / sizeof(EscapeSubTable);
     memcpy(dataPtr->subTables, Tcl_DStringValue(&escapeData),
-	    (size_t) Tcl_DStringLength(&escapeData));
+	    Tcl_DStringLength(&escapeData));
     Tcl_DStringFree(&escapeData);
 
     memset(dataPtr->prefixBytes, 0, sizeof(dataPtr->prefixBytes));
diff --git a/generic/tclEnsemble.c b/generic/tclEnsemble.c
index 94c0b76..84ed9e3 100644
--- a/generic/tclEnsemble.c
+++ b/generic/tclEnsemble.c
@@ -21,8 +21,6 @@ static inline Tcl_Obj *	NewNsObj(Tcl_Namespace *namespacePtr);
 static inline int	EnsembleUnknownCallback(Tcl_Interp *interp,
 			    EnsembleConfig *ensemblePtr, int objc,
 			    Tcl_Obj *const objv[], Tcl_Obj **prefixObjPtr);
-static int		NsEnsembleImplementationCmd(ClientData clientData,
-			    Tcl_Interp *interp,int objc,Tcl_Obj *const objv[]);
 static int		NsEnsembleImplementationCmdNR(ClientData clientData,
 			    Tcl_Interp *interp,int objc,Tcl_Obj *const objv[]);
 static void		BuildEnsembleConfig(EnsembleConfig *ensemblePtr);
@@ -664,7 +662,7 @@ TclCreateEnsembleInNs(
 
     ensemblePtr = ckalloc(sizeof(EnsembleConfig));
     token = TclNRCreateCommandInNs(interp, name,
-	    (Tcl_Namespace *) nameNsPtr, NsEnsembleImplementationCmd,
+	    (Tcl_Namespace *) nameNsPtr, TclEnsembleImplementationCmd,
 	    NsEnsembleImplementationCmdNR, ensemblePtr, DeleteEnsembleConfig);
     if (token == NULL) {
 	ckfree(ensemblePtr);
@@ -768,7 +766,7 @@ Tcl_SetEnsembleSubcommandList(
     EnsembleConfig *ensemblePtr;
     Tcl_Obj *oldList;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		"command is not an ensemble", -1));
 	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
@@ -844,7 +842,7 @@ Tcl_SetEnsembleParameterList(
     Tcl_Obj *oldList;
     int length;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		"command is not an ensemble", -1));
 	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
@@ -920,7 +918,7 @@ Tcl_SetEnsembleMappingDict(
     EnsembleConfig *ensemblePtr;
     Tcl_Obj *oldDict;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		"command is not an ensemble", -1));
 	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
@@ -1019,7 +1017,7 @@ Tcl_SetEnsembleUnknownHandler(
     EnsembleConfig *ensemblePtr;
     Tcl_Obj *oldList;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		"command is not an ensemble", -1));
 	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
@@ -1085,7 +1083,7 @@ Tcl_SetEnsembleFlags(
     EnsembleConfig *ensemblePtr;
     int wasCompiled;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		"command is not an ensemble", -1));
 	Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "NOT_ENSEMBLE", NULL);
@@ -1161,7 +1159,7 @@ Tcl_GetEnsembleSubcommandList(
     Command *cmdPtr = (Command *) token;
     EnsembleConfig *ensemblePtr;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	if (interp != NULL) {
 	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		    "command is not an ensemble", -1));
@@ -1203,7 +1201,7 @@ Tcl_GetEnsembleParameterList(
     Command *cmdPtr = (Command *) token;
     EnsembleConfig *ensemblePtr;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	if (interp != NULL) {
 	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		    "command is not an ensemble", -1));
@@ -1245,7 +1243,7 @@ Tcl_GetEnsembleMappingDict(
     Command *cmdPtr = (Command *) token;
     EnsembleConfig *ensemblePtr;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	if (interp != NULL) {
 	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		    "command is not an ensemble", -1));
@@ -1286,7 +1284,7 @@ Tcl_GetEnsembleUnknownHandler(
     Command *cmdPtr = (Command *) token;
     EnsembleConfig *ensemblePtr;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	if (interp != NULL) {
 	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		    "command is not an ensemble", -1));
@@ -1327,7 +1325,7 @@ Tcl_GetEnsembleFlags(
     Command *cmdPtr = (Command *) token;
     EnsembleConfig *ensemblePtr;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	if (interp != NULL) {
 	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		    "command is not an ensemble", -1));
@@ -1368,7 +1366,7 @@ Tcl_GetEnsembleNamespace(
     Command *cmdPtr = (Command *) token;
     EnsembleConfig *ensemblePtr;
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	if (interp != NULL) {
 	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		    "command is not an ensemble", -1));
@@ -1418,7 +1416,7 @@ Tcl_FindEnsemble(
 	return NULL;
     }
 
-    if (cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	/*
 	 * Reuse existing infrastructure for following import link chains
 	 * rather than duplicating it.
@@ -1426,7 +1424,8 @@ Tcl_FindEnsemble(
 
 	cmdPtr = (Command *) TclGetOriginalCommand((Tcl_Command) cmdPtr);
 
-	if (cmdPtr == NULL || cmdPtr->objProc != NsEnsembleImplementationCmd){
+	if (cmdPtr == NULL
+		|| cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	    if (flags & TCL_LEAVE_ERR_MSG) {
 		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 			"\"%s\" is not an ensemble command",
@@ -1464,11 +1463,11 @@ Tcl_IsEnsemble(
 {
     Command *cmdPtr = (Command *) token;
 
-    if (cmdPtr->objProc == NsEnsembleImplementationCmd) {
+    if (cmdPtr->objProc == TclEnsembleImplementationCmd) {
 	return 1;
     }
     cmdPtr = (Command *) TclGetOriginalCommand((Tcl_Command) cmdPtr);
-    if (cmdPtr == NULL || cmdPtr->objProc != NsEnsembleImplementationCmd) {
+    if (cmdPtr == NULL || cmdPtr->objProc != TclEnsembleImplementationCmd) {
 	return 0;
     }
     return 1;
@@ -1639,7 +1638,7 @@ TclMakeEnsemble(
 /*
  *----------------------------------------------------------------------
  *
- * NsEnsembleImplementationCmd --
+ * TclEnsembleImplementationCmd --
  *
  *	Implements an ensemble of commands (being those exported by a
  *	namespace other than the global namespace) as a command with the same
@@ -1658,8 +1657,8 @@ TclMakeEnsemble(
  *----------------------------------------------------------------------
  */
 
-static int
-NsEnsembleImplementationCmd(
+int
+TclEnsembleImplementationCmd(
     ClientData clientData,
     Tcl_Interp *interp,
     int objc,
diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index 82de752..7355bc1 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -500,7 +500,7 @@ VarHashCreateVar(
 
 #define GetNumberFromObj(interp, objPtr, ptrPtr, tPtr) \
     (((objPtr)->typePtr == &tclIntType)					\
-	?	(*(tPtr) = TCL_NUMBER_WIDE,				\
+	?	(*(tPtr) = TCL_NUMBER_INT,				\
 		*(ptrPtr) = (ClientData)				\
 		    (&((objPtr)->internalRep.wideValue)), TCL_OK) :	\
     ((objPtr)->typePtr == &tclDoubleType)				\
@@ -3620,7 +3620,7 @@ TEBCresume(
 
 	    objPtr = varPtr->value.objPtr;
 	    if (GetNumberFromObj(NULL, objPtr, &ptr, &type) == TCL_OK) {
-		if (type == TCL_NUMBER_WIDE) {
+		if (type == TCL_NUMBER_INT) {
 		    Tcl_WideInt augend = *((const Tcl_WideInt *)ptr);
 		    Tcl_WideInt sum = augend + increment;
 
@@ -3662,7 +3662,7 @@ TEBCresume(
 			TclSetIntObj(objPtr, w+increment);
 		    }
 		    goto doneIncr;
-		}	/* end if (type == TCL_NUMBER_WIDE) */
+		}	/* end if (type == TCL_NUMBER_INT) */
 	    }
 	    if (Tcl_IsShared(objPtr)) {
 		objPtr->refCount--;	/* We know it's shared */
@@ -4070,10 +4070,7 @@ TEBCresume(
 		TRACE_ERROR(interp);
 		goto gotError;
 	    }
-	    TclSetVarArray(varPtr);
-	    varPtr->value.tablePtr = ckalloc(sizeof(TclVarHashTable));
-	    TclInitVarHashTable(varPtr->value.tablePtr,
-		    TclGetVarNsPtr(varPtr));
+	    TclInitArrayVar(varPtr);
 #ifdef TCL_COMPILE_DEBUG
 	    TRACE_APPEND(("done\n"));
 	} else {
@@ -4764,7 +4761,7 @@ TEBCresume(
 
 	if ((TclListObjGetElements(interp, valuePtr, &objc, &objv) == TCL_OK)
 		&& (value2Ptr->typePtr != &tclListType)
-		&& (TclGetIntForIndexM(NULL , value2Ptr, objc-1,
+		&& (TclGetIntForIndexM(NULL, value2Ptr, objc-1,
 			&index) == TCL_OK)) {
 	    TclDecrRefCount(value2Ptr);
 	    tosPtr--;
@@ -5634,22 +5631,13 @@ TEBCresume(
     case INST_NUM_TYPE:
 	if (GetNumberFromObj(NULL, OBJ_AT_TOS, &ptr1, &type1) != TCL_OK) {
 	    type1 = 0;
-	} else if (type1 == TCL_NUMBER_WIDE) {
-	    /* value is between LLONG_MIN and LLONG_MAX */
-	    /* [string is integer] is -UINT_MAX to UINT_MAX range */
-	    /* [string is wideinteger] is -ULLONG_MAX to ULLONG_MAX range */
-	    int i;
-
-	    if (Tcl_GetIntFromObj(NULL, OBJ_AT_TOS, &i) == TCL_OK) {
-		type1 = TCL_NUMBER_LONG;
-	    }
 	} else if (type1 == TCL_NUMBER_BIG) {
-	    /* value is an integer outside the LLONG_MIN to LLONG_MAX range */
-	    /* [string is wideinteger] is -ULLONG_MAX to ULLONG_MAX range */
+	    /* value is an integer outside the WIDE_MIN to WIDE_MAX range */
+	    /* [string is wideinteger] is WIDE_MIN to WIDE_MAX range */
 	    Tcl_WideInt w;
 
 	    if (Tcl_GetWideIntFromObj(NULL, OBJ_AT_TOS, &w) == TCL_OK) {
-		type1 = TCL_NUMBER_WIDE;
+		type1 = TCL_NUMBER_INT;
 	    }
 	}
 	TclNewIntObj(objResultPtr, type1);
@@ -5695,7 +5683,7 @@ TEBCresume(
 	    compare = MP_EQ;
 	    goto convertComparison;
 	}
-	if ((type1 == TCL_NUMBER_WIDE) && (type2 == TCL_NUMBER_WIDE)) {
+	if ((type1 == TCL_NUMBER_INT) && (type2 == TCL_NUMBER_INT)) {
 	    w1 = *((const Tcl_WideInt *)ptr1);
 	    w2 = *((const Tcl_WideInt *)ptr2);
 	    compare = (w1 < w2) ? MP_LT : ((w1 > w2) ? MP_GT : MP_EQ);
@@ -5774,7 +5762,7 @@ TEBCresume(
 	 * Check for common, simple case.
 	 */
 
-	if ((type1 == TCL_NUMBER_WIDE) && (type2 == TCL_NUMBER_WIDE)) {
+	if ((type1 == TCL_NUMBER_INT) && (type2 == TCL_NUMBER_INT)) {
 	    w1 = *((const Tcl_WideInt *)ptr1);
 	    w2 = *((const Tcl_WideInt *)ptr2);
 
@@ -6014,7 +6002,7 @@ TEBCresume(
 	 * an external function.
 	 */
 
-	if ((type1 == TCL_NUMBER_WIDE) && (type2 == TCL_NUMBER_WIDE)) {
+	if ((type1 == TCL_NUMBER_INT) && (type2 == TCL_NUMBER_INT)) {
 	    w1 = *((const Tcl_WideInt *)ptr1);
 	    w2 = *((const Tcl_WideInt *)ptr2);
 
@@ -6061,9 +6049,9 @@ TEBCresume(
 		    TRACE(("%s %s => DIVIDE BY ZERO\n",
 			    O2S(valuePtr), O2S(value2Ptr)));
 		    goto divideByZero;
-		} else if ((w1 == LLONG_MIN) && (w2 == -1)) {
+		} else if ((w1 == WIDE_MIN) && (w2 == -1)) {
 		    /*
-		     * Can't represent (-LLONG_MIN) as a Tcl_WideInt.
+		     * Can't represent (-WIDE_MIN) as a Tcl_WideInt.
 		     */
 
 		    goto overflow;
@@ -6157,7 +6145,7 @@ TEBCresume(
 	    CACHE_STACK_INFO();
 	    goto gotError;
 	}
-	if (type1 == TCL_NUMBER_WIDE) {
+	if (type1 == TCL_NUMBER_INT) {
 	    w1 = *((const Tcl_WideInt *) ptr1);
 	    if (Tcl_IsShared(valuePtr)) {
 		TclNewIntObj(objResultPtr, ~w1);
@@ -6194,9 +6182,9 @@ TEBCresume(
 	    /* -NaN => NaN */
 	    TRACE_APPEND(("%s\n", O2S(valuePtr)));
 	    NEXT_INST_F(1, 0, 0);
-	case TCL_NUMBER_WIDE:
+	case TCL_NUMBER_INT:
 	    w1 = *((const Tcl_WideInt *) ptr1);
-	    if (w1 != LLONG_MIN) {
+	    if (w1 != WIDE_MIN) {
 		if (Tcl_IsShared(valuePtr)) {
 		    TclNewIntObj(objResultPtr, -w1);
 		    TRACE_APPEND(("%s\n", O2S(objResultPtr)));
@@ -7873,7 +7861,7 @@ ExecuteExtendedBinaryMathOp(
 	/* TODO: Attempts to re-use unshared operands on stack */
 
 	w2 = 0;			/* silence gcc warning */
-	if (type2 == TCL_NUMBER_WIDE) {
+	if (type2 == TCL_NUMBER_INT) {
 	    w2 = *((const Tcl_WideInt *)ptr2);
 	    if (w2 == 0) {
 		return DIVIDED_BY_ZERO;
@@ -7886,7 +7874,7 @@ ExecuteExtendedBinaryMathOp(
 		return constants[0];
 	    }
 	}
-	if (type1 == TCL_NUMBER_WIDE) {
+	if (type1 == TCL_NUMBER_INT) {
 	    w1 = *((const Tcl_WideInt *)ptr1);
 
 	    if (w1 == 0) {
@@ -7964,7 +7952,7 @@ ExecuteExtendedBinaryMathOp(
 	 */
 
 	switch (type2) {
-	case TCL_NUMBER_WIDE:
+	case TCL_NUMBER_INT:
 	    invalid = (*((const Tcl_WideInt *)ptr2) < (Tcl_WideInt)0);
 	    break;
 	case TCL_NUMBER_BIG:
@@ -7986,7 +7974,7 @@ ExecuteExtendedBinaryMathOp(
 	 * Zero shifted any number of bits is still zero.
 	 */
 
-	if ((type1==TCL_NUMBER_WIDE) && (*((const Tcl_WideInt *)ptr1) == (Tcl_WideInt)0)) {
+	if ((type1==TCL_NUMBER_INT) && (*((const Tcl_WideInt *)ptr1) == (Tcl_WideInt)0)) {
 	    return constants[0];
 	}
 
@@ -7999,7 +7987,7 @@ ExecuteExtendedBinaryMathOp(
 	     * counterparts, leading to incorrect results.
 	     */
 
-	    if ((type2 != TCL_NUMBER_WIDE)
+	    if ((type2 != TCL_NUMBER_INT)
 		    || (*((const Tcl_WideInt *)ptr2) > INT_MAX)) {
 		/*
 		 * Technically, we could hold the value (1 << (INT_MAX+1)) in
@@ -8032,7 +8020,7 @@ ExecuteExtendedBinaryMathOp(
 	     * Quickly force large right shifts to 0 or -1.
 	     */
 
-	    if ((type2 != TCL_NUMBER_WIDE)
+	    if ((type2 != TCL_NUMBER_INT)
 		    || (*(const Tcl_WideInt *)ptr2 > INT_MAX)) {
 		/*
 		 * Again, technically, the value to be shifted could be an
@@ -8043,7 +8031,7 @@ ExecuteExtendedBinaryMathOp(
 		 */
 
 		switch (type1) {
-		case TCL_NUMBER_WIDE:
+		case TCL_NUMBER_INT:
 		    zero = (*(const Tcl_WideInt *)ptr1 > (Tcl_WideInt)0);
 		    break;
 		case TCL_NUMBER_BIG:
@@ -8066,7 +8054,7 @@ ExecuteExtendedBinaryMathOp(
 	     * Handle shifts within the native wide range.
 	     */
 
-	    if (type1 == TCL_NUMBER_WIDE) {
+	    if (type1 == TCL_NUMBER_INT) {
 		w1 = *(const Tcl_WideInt *)ptr1;
 		if ((size_t)shift >= CHAR_BIT*sizeof(Tcl_WideInt)) {
 		    if (w1 >= (Tcl_WideInt)0) {
@@ -8243,7 +8231,7 @@ ExecuteExtendedBinaryMathOp(
 	    BIG_RESULT(&bigResult);
 	}
 
-	if ((type1 == TCL_NUMBER_WIDE) || (type2 == TCL_NUMBER_WIDE)) {
+	if ((type1 == TCL_NUMBER_INT) || (type2 == TCL_NUMBER_INT)) {
 	    TclGetWideIntFromObj(NULL, valuePtr, &w1);
 	    TclGetWideIntFromObj(NULL, value2Ptr, &w2);
 
@@ -8297,7 +8285,7 @@ ExecuteExtendedBinaryMathOp(
 	    goto doubleResult;
 	}
 	w2 = 0;
-	if (type2 == TCL_NUMBER_WIDE) {
+	if (type2 == TCL_NUMBER_INT) {
 	    w2 = *((const Tcl_WideInt *) ptr2);
 	    if (w2 == 0) {
 		/*
@@ -8315,7 +8303,7 @@ ExecuteExtendedBinaryMathOp(
 	}
 
 	switch (type2) {
-	case TCL_NUMBER_WIDE:
+	case TCL_NUMBER_INT:
 	    w2 = *((const Tcl_WideInt *)ptr2);
 	    negativeExponent = (w2 < 0);
 	    oddExponent = (int) (w2 & (Tcl_WideInt)1);
@@ -8329,11 +8317,11 @@ ExecuteExtendedBinaryMathOp(
 	    break;
 	}
 
-	if (type1 == TCL_NUMBER_WIDE) {
+	if (type1 == TCL_NUMBER_INT) {
 	    w1 = *((const Tcl_WideInt *)ptr1);
 	}
 	if (negativeExponent) {
-	    if (type1 == TCL_NUMBER_WIDE) {
+	    if (type1 == TCL_NUMBER_INT) {
 		switch (w1) {
 		case 0:
 		    /*
@@ -8363,7 +8351,7 @@ ExecuteExtendedBinaryMathOp(
 	    return constants[0];
 	}
 
-	if (type1 == TCL_NUMBER_WIDE) {
+	if (type1 == TCL_NUMBER_INT) {
 	    switch (w1) {
 	    case 0:
 		/*
@@ -8390,17 +8378,17 @@ ExecuteExtendedBinaryMathOp(
 	 * which means the max exponent value is 2**28-1 = 0x0fffffff =
 	 * 268435455, which fits into a signed 32 bit int which is within the
 	 * range of the long int type. This means any numeric Tcl_Obj value
-	 * not using TCL_NUMBER_WIDE type must hold a value larger than we
+	 * not using TCL_NUMBER_INT type must hold a value larger than we
 	 * accept.
 	 */
 
-	if (type2 != TCL_NUMBER_WIDE) {
+	if (type2 != TCL_NUMBER_INT) {
 	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
 		    "exponent too large", -1));
 	    return GENERAL_ARITHMETIC_ERROR;
 	}
 
-	if (type1 == TCL_NUMBER_WIDE) {
+	if (type1 == TCL_NUMBER_INT) {
 	    if (w1 == 2) {
 		/*
 		 * Reduce small powers of 2 to shifts.
@@ -8424,7 +8412,7 @@ ExecuteExtendedBinaryMathOp(
 		goto overflowExpon;
 	    }
 	}
-	if (type1 == TCL_NUMBER_WIDE) {
+	if (type1 == TCL_NUMBER_INT) {
 	    w1 = *((const Tcl_WideInt *) ptr1);
 	} else {
 	    goto overflowExpon;
@@ -8624,7 +8612,7 @@ ExecuteExtendedBinaryMathOp(
 	    switch (opcode) {
 	    case INST_ADD:
 		wResult = w1 + w2;
-		if ((type1 == TCL_NUMBER_WIDE) || (type2 == TCL_NUMBER_WIDE))
+		if ((type1 == TCL_NUMBER_INT) || (type2 == TCL_NUMBER_INT))
 		{
 		    /*
 		     * Check for overflow.
@@ -8638,7 +8626,7 @@ ExecuteExtendedBinaryMathOp(
 
 	    case INST_SUB:
 		wResult = w1 - w2;
-		if ((type1 == TCL_NUMBER_WIDE) || (type2 == TCL_NUMBER_WIDE))
+		if ((type1 == TCL_NUMBER_INT) || (type2 == TCL_NUMBER_INT))
 		{
 		    /*
 		     * Must check for overflow. The macro tests for overflows
@@ -8670,10 +8658,10 @@ ExecuteExtendedBinaryMathOp(
 		}
 
 		/*
-		 * Need a bignum to represent (LLONG_MIN / -1)
+		 * Need a bignum to represent (WIDE_MIN / -1)
 		 */
 
-		if ((w1 == LLONG_MIN) && (w2 == -1)) {
+		if ((w1 == WIDE_MIN) && (w2 == -1)) {
 		    goto overflowBasic;
 		}
 		wResult = w1 / w2;
@@ -8761,7 +8749,7 @@ ExecuteExtendedUnaryMathOp(
 
     switch (opcode) {
     case INST_BITNOT:
-	if (type == TCL_NUMBER_WIDE) {
+	if (type == TCL_NUMBER_INT) {
 	    w = *((const Tcl_WideInt *) ptr);
 	    WIDE_RESULT(~w);
 	}
@@ -8774,9 +8762,9 @@ ExecuteExtendedUnaryMathOp(
 	switch (type) {
 	case TCL_NUMBER_DOUBLE:
 	    DOUBLE_RESULT(-(*((const double *) ptr)));
-	case TCL_NUMBER_WIDE:
+	case TCL_NUMBER_INT:
 	    w = *((const Tcl_WideInt *) ptr);
-	    if (w != LLONG_MIN) {
+	    if (w != WIDE_MIN) {
 		WIDE_RESULT(-w);
 	    }
 	    TclInitBignumFromWideInt(&big, w);
@@ -8828,10 +8816,10 @@ TclCompareTwoNumbers(
     (void) GetNumberFromObj(NULL, value2Ptr, &ptr2, &type2);
 
     switch (type1) {
-    case TCL_NUMBER_WIDE:
+    case TCL_NUMBER_INT:
 	w1 = *((const Tcl_WideInt *)ptr1);
 	switch (type2) {
-	case TCL_NUMBER_WIDE:
+	case TCL_NUMBER_INT:
 	    w2 = *((const Tcl_WideInt *)ptr2);
 	wideCompare:
 	    return (w1 < w2) ? MP_LT : ((w1 > w2) ? MP_GT : MP_EQ);
@@ -8862,10 +8850,10 @@ TclCompareTwoNumbers(
 	     * integer comparison can tell the difference.
 	     */
 
-	    if (d2 < (double)LLONG_MIN) {
+	    if (d2 < (double)WIDE_MIN) {
 		return MP_GT;
 	    }
-	    if (d2 > (double)LLONG_MAX) {
+	    if (d2 > (double)WIDE_MAX) {
 		return MP_LT;
 	    }
 	    w2 = (Tcl_WideInt) d2;
@@ -8888,17 +8876,17 @@ TclCompareTwoNumbers(
 	    d2 = *((const double *)ptr2);
 	doubleCompare:
 	    return (d1 < d2) ? MP_LT : ((d1 > d2) ? MP_GT : MP_EQ);
-	case TCL_NUMBER_WIDE:
+	case TCL_NUMBER_INT:
 	    w2 = *((const Tcl_WideInt *)ptr2);
 	    d2 = (double) w2;
 	    if (DBL_MANT_DIG > CHAR_BIT*sizeof(Tcl_WideInt)
 		    || w2 == (Tcl_WideInt) d2 || modf(d1, &tmp) != 0.0) {
 		goto doubleCompare;
 	    }
-	    if (d1 < (double)LLONG_MIN) {
+	    if (d1 < (double)WIDE_MIN) {
 		return MP_LT;
 	    }
-	    if (d1 > (double)LLONG_MAX) {
+	    if (d1 > (double)WIDE_MAX) {
 		return MP_GT;
 	    }
 	    w1 = (Tcl_WideInt) d1;
@@ -8908,7 +8896,7 @@ TclCompareTwoNumbers(
 		return (d1 > 0.0) ? MP_GT : MP_LT;
 	    }
 	    Tcl_TakeBignumFromObj(NULL, value2Ptr, &big2);
-	    if ((d1 < (double)LLONG_MAX) && (d1 > (double)LLONG_MIN)) {
+	    if ((d1 < (double)WIDE_MAX) && (d1 > (double)WIDE_MIN)) {
 		if (mp_isneg(&big2)) {
 		    compare = MP_GT;
 		} else {
@@ -8930,7 +8918,7 @@ TclCompareTwoNumbers(
     case TCL_NUMBER_BIG:
 	Tcl_TakeBignumFromObj(NULL, valuePtr, &big1);
 	switch (type2) {
-	case TCL_NUMBER_WIDE:
+	case TCL_NUMBER_INT:
 	    compare = mp_cmp_d(&big1, 0);
 	    mp_clear(&big1);
 	    return compare;
@@ -8941,7 +8929,7 @@ TclCompareTwoNumbers(
 		mp_clear(&big1);
 		return compare;
 	    }
-	    if ((d2 < (double)LLONG_MAX) && (d2 > (double)LLONG_MIN)) {
+	    if ((d2 < (double)WIDE_MAX) && (d2 > (double)WIDE_MIN)) {
 		compare = mp_cmp_d(&big1, 0);
 		mp_clear(&big1);
 		return compare;
diff --git a/generic/tclFileName.c b/generic/tclFileName.c
index 15fcde7..015cfc3 100644
--- a/generic/tclFileName.c
+++ b/generic/tclFileName.c
@@ -1881,7 +1881,7 @@ TclGlob(
 	separators = "/\\";
 
     } else if (tclPlatform == TCL_PLATFORM_UNIX) {
-	if (pathPrefix == NULL && tail[0] == '/') {
+	if (pathPrefix == NULL && tail[0] == '/' && tail[1] != '/') {
 	    pathPrefix = Tcl_NewStringObj(tail, 1);
 	    tail++;
 	    Tcl_IncrRefCount(pathPrefix);
diff --git a/generic/tclGetDate.y b/generic/tclGetDate.y
index da4c3fd..9c67227 100644
--- a/generic/tclGetDate.y
+++ b/generic/tclGetDate.y
@@ -897,7 +897,7 @@ TclDatelex(
 
     location->first_column = yyInput - info->dateStart;
     for ( ; ; ) {
-	while (isspace(UCHAR(*yyInput))) {
+	while (TclIsSpaceProc(UCHAR(*yyInput))) {
 	    yyInput++;
 	}
 
diff --git a/generic/tclIO.c b/generic/tclIO.c
index ad6c7ee..10362d4 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -482,13 +482,13 @@ ChanSeek(
 		offset, mode, errnoPtr);
     }
 
-    if (offset<Tcl_LongAsWide(LONG_MIN) || offset>Tcl_LongAsWide(LONG_MAX)) {
+    if (offset<LONG_MIN || offset>LONG_MAX) {
 	*errnoPtr = EOVERFLOW;
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
-    return Tcl_LongAsWide(chanPtr->typePtr->seekProc(chanPtr->instanceData,
-	    Tcl_WideAsLong(offset), mode, errnoPtr));
+    return chanPtr->typePtr->seekProc(chanPtr->instanceData,
+	    offset, mode, errnoPtr);
 }
 
 static inline void
@@ -6953,7 +6953,7 @@ Tcl_Seek(
 				 * non-blocking mode after the seek. */
 
     if (CheckChannelErrors(statePtr, TCL_WRITABLE | TCL_READABLE) != 0) {
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -6964,7 +6964,7 @@ Tcl_Seek(
      */
 
     if (CheckForDeadChannel(NULL, statePtr)) {
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -6980,7 +6980,7 @@ Tcl_Seek(
 
     if (chanPtr->typePtr->seekProc == NULL) {
 	Tcl_SetErrno(EINVAL);
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -6993,7 +6993,7 @@ Tcl_Seek(
 
     if ((inputBuffered != 0) && (outputBuffered != 0)) {
 	Tcl_SetErrno(EFAULT);
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -7036,7 +7036,7 @@ Tcl_Seek(
 	wasAsync = 1;
 	result = StackSetBlockMode(chanPtr, TCL_MODE_BLOCKING);
 	if (result != 0) {
-	    return Tcl_LongAsWide(-1);
+	    return -1;
 	}
 	ResetFlag(statePtr, CHANNEL_NONBLOCKING);
 	if (GotFlag(statePtr, BG_FLUSH_SCHEDULED)) {
@@ -7061,7 +7061,7 @@ Tcl_Seek(
 	 */
 
 	curPos = ChanSeek(chanPtr, offset, mode, &result);
-	if (curPos == Tcl_LongAsWide(-1)) {
+	if (curPos == -1) {
 	    Tcl_SetErrno(result);
 	}
     }
@@ -7077,7 +7077,7 @@ Tcl_Seek(
 	SetFlag(statePtr, CHANNEL_NONBLOCKING);
 	result = StackSetBlockMode(chanPtr, TCL_MODE_NONBLOCKING);
 	if (result != 0) {
-	    return Tcl_LongAsWide(-1);
+	    return -1;
 	}
     }
 
@@ -7117,7 +7117,7 @@ Tcl_Tell(
     Tcl_WideInt curPos;		/* Position on device. */
 
     if (CheckChannelErrors(statePtr, TCL_WRITABLE | TCL_READABLE) != 0) {
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -7128,7 +7128,7 @@ Tcl_Tell(
      */
 
     if (CheckForDeadChannel(NULL, statePtr)) {
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -7144,7 +7144,7 @@ Tcl_Tell(
 
     if (chanPtr->typePtr->seekProc == NULL) {
 	Tcl_SetErrno(EINVAL);
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -7161,10 +7161,10 @@ Tcl_Tell(
      * wideSeekProc if that is available and non-NULL...
      */
 
-    curPos = ChanSeek(chanPtr, Tcl_LongAsWide(0), SEEK_CUR, &result);
-    if (curPos == Tcl_LongAsWide(-1)) {
+    curPos = ChanSeek(chanPtr, 0, SEEK_CUR, &result);
+    if (curPos == -1) {
 	Tcl_SetErrno(result);
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     if (inputBuffered != 0) {
diff --git a/generic/tclIOCmd.c b/generic/tclIOCmd.c
index 87bf415..1dd8666 100644
--- a/generic/tclIOCmd.c
+++ b/generic/tclIOCmd.c
@@ -559,7 +559,7 @@ Tcl_SeekObjCmd(
 
     TclChannelPreserve(chan);
     result = Tcl_Seek(chan, offset, mode);
-    if (result == Tcl_LongAsWide(-1)) {
+    if (result == -1) {
 	/*
 	 * TIP #219.
 	 * Capture error messages put by the driver into the bypass area and
@@ -991,7 +991,7 @@ Tcl_ExecObjCmd(
 
     resultPtr = Tcl_NewObj();
     if (Tcl_GetChannelHandle(chan, TCL_READABLE, NULL) == TCL_OK) {
-	if (Tcl_ReadChars(chan, resultPtr, -1, 0) < 0) {
+	if (Tcl_ReadChars(chan, resultPtr, -1, 0) == TCL_IO_FAILURE) {
 	    /*
 	     * TIP #219.
 	     * Capture error messages put by the driver into the bypass area
@@ -1913,7 +1913,7 @@ ChanTruncateObjCmd(
 	 */
 
 	length = Tcl_Tell(chan);
-	if (length == Tcl_WideAsLong(-1)) {
+	if (length == -1) {
 	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		    "could not determine current location in \"%s\": %s",
 		    TclGetString(objv[1]), Tcl_PosixError(interp)));
diff --git a/generic/tclIOGT.c b/generic/tclIOGT.c
index c1e8c44..9949a0e 100644
--- a/generic/tclIOGT.c
+++ b/generic/tclIOGT.c
@@ -910,7 +910,7 @@ TransformWideSeekProc(
 	    Tcl_ChannelWideSeekProc(parentType);
     ClientData parentData = Tcl_GetChannelInstanceData(parent);
 
-    if ((offset == Tcl_LongAsWide(0)) && (mode == SEEK_CUR)) {
+    if ((offset == 0) && (mode == SEEK_CUR)) {
 	/*
 	 * This is no seek but a request to tell the caller the current
 	 * location. Simply pass the request down.
@@ -920,8 +920,7 @@ TransformWideSeekProc(
 	    return parentWideSeekProc(parentData, offset, mode, errorCodePtr);
 	}
 
-	return Tcl_LongAsWide(parentSeekProc(parentData, 0, mode,
-		errorCodePtr));
+	return parentSeekProc(parentData, 0, mode, errorCodePtr);
     }
 
     /*
@@ -961,13 +960,13 @@ TransformWideSeekProc(
      * to go out of the representable range.
      */
 
-    if (offset<Tcl_LongAsWide(LONG_MIN) || offset>Tcl_LongAsWide(LONG_MAX)) {
+    if (offset<LONG_MIN || offset>LONG_MAX) {
 	*errorCodePtr = EOVERFLOW;
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
-    return Tcl_LongAsWide(parentSeekProc(parentData, Tcl_WideAsLong(offset),
-	    mode, errorCodePtr));
+    return parentSeekProc(parentData, offset,
+	    mode, errorCodePtr);
 }
 
 /*
diff --git a/generic/tclIORChan.c b/generic/tclIORChan.c
index 354f1fb..611ee3f 100644
--- a/generic/tclIORChan.c
+++ b/generic/tclIORChan.c
@@ -1544,7 +1544,7 @@ ReflectSeekWide(
         goto invalid;
     }
 
-    if (newLoc < Tcl_LongAsWide(0)) {
+    if (newLoc < 0) {
 	SetChannelErrorStr(rcPtr->chan, msg_seek_beforestart);
         goto invalid;
     }
@@ -1576,7 +1576,7 @@ ReflectSeek(
      * routine.
      */
 
-    return (int) ReflectSeekWide(clientData, Tcl_LongAsWide(offset), seekMode,
+    return ReflectSeekWide(clientData, offset, seekMode,
 	    errorCodePtr);
 }
 
@@ -3079,7 +3079,7 @@ ForwardProc(
 	    Tcl_WideInt newLoc;
 
 	    if (Tcl_GetWideIntFromObj(interp, resObj, &newLoc) == TCL_OK) {
-		if (newLoc < Tcl_LongAsWide(0)) {
+		if (newLoc < 0) {
 		    ForwardSetStaticError(paramPtr, msg_seek_beforestart);
 		    paramPtr->seek.offset = -1;
 		} else {
diff --git a/generic/tclIORTrans.c b/generic/tclIORTrans.c
index 1a7b940..4841e39 100644
--- a/generic/tclIORTrans.c
+++ b/generic/tclIORTrans.c
@@ -1340,7 +1340,7 @@ ReflectSeekWide(
 
     if (seekProc == NULL) {
 	Tcl_SetErrno(EINVAL);
-	return Tcl_LongAsWide(-1);
+	return -1;
     }
 
     /*
@@ -1390,16 +1390,15 @@ ReflectSeekWide(
 	parent->typePtr->wideSeekProc != NULL) {
 	curPos = parent->typePtr->wideSeekProc(parent->instanceData, offset,
 		seekMode, errorCodePtr);
-    } else if (offset < Tcl_LongAsWide(LONG_MIN) ||
-	    offset > Tcl_LongAsWide(LONG_MAX)) {
+    } else if (offset < LONG_MIN || offset > LONG_MAX) {
 	*errorCodePtr = EOVERFLOW;
-	curPos = Tcl_LongAsWide(-1);
+	curPos = -1;
     } else {
-	curPos = Tcl_LongAsWide(parent->typePtr->seekProc(
-		parent->instanceData, Tcl_WideAsLong(offset), seekMode,
-		errorCodePtr));
+	curPos = parent->typePtr->seekProc(
+		parent->instanceData, offset, seekMode,
+		errorCodePtr);
     }
-    if (curPos == Tcl_LongAsWide(-1)) {
+    if (curPos == -1) {
 	Tcl_SetErrno(*errorCodePtr);
     }
 
@@ -1422,7 +1421,7 @@ ReflectSeek(
      * routine.
      */
 
-    return (int) ReflectSeekWide(clientData, Tcl_LongAsWide(offset), seekMode,
+    return ReflectSeekWide(clientData, offset, seekMode,
 	    errorCodePtr);
 }
 
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c
index 3132cae..63d16be 100644
--- a/generic/tclIOUtil.c
+++ b/generic/tclIOUtil.c
@@ -275,8 +275,8 @@ Tcl_Stat(
 	Tcl_WideInt tmp1, tmp2, tmp3 = 0;
 
 # define OUT_OF_RANGE(x) \
-	(((Tcl_WideInt)(x)) < Tcl_LongAsWide(LONG_MIN) || \
-	 ((Tcl_WideInt)(x)) > Tcl_LongAsWide(LONG_MAX))
+	(((Tcl_WideInt)(x)) < LONG_MIN || \
+	 ((Tcl_WideInt)(x)) > LONG_MAX)
 # define OUT_OF_URANGE(x) \
 	(((Tcl_WideUInt)(x)) > ((Tcl_WideUInt)ULONG_MAX))
 
@@ -1390,31 +1390,62 @@ TclFSNormalizeToUniquePath(
 {
     FilesystemRecord *fsRecPtr, *firstFsRecPtr;
 
+    int i;
+    int isVfsPath = 0;
+    char *path;
+
     /*
-     * Call each of the "normalise path" functions in succession. This is a
-     * special case, in which if we have a native filesystem handler, we call
-     * it first. This is because the root of Tcl's filesystem is always a
-     * native filesystem (i.e., '/' on unix is native).
+     * Paths starting with a UNC prefix whose final character is a colon
+     * are reserved for VFS use.  These names can not conflict with real
+     * UNC paths per https://msdn.microsoft.com/en-us/library/gg465305.aspx
+     * and rfc3986's definition of reg-name.
+     *
+     * We check these first to avoid useless calls to the native filesystem's
+     * normalizePathProc.
      */
+    path = Tcl_GetStringFromObj(pathPtr, &i);
+
+    if ( (i >= 3) && ( (path[0] == '/' && path[1] == '/')
+		    || (path[0] == '\\' && path[1] == '\\') ) ) {
+	for ( i = 2; ; i++) {
+	    if (path[i] == '\0') break;
+	    if (path[i] == path[0]) break;
+	}
+	--i;
+	if (path[i] == ':') isVfsPath = 1;
+    }
 
+    /*
+     * Call each of the "normalise path" functions in succession.
+     */
     firstFsRecPtr = FsGetFirstFilesystem();
 
     Claim();
-    for (fsRecPtr=firstFsRecPtr; fsRecPtr!=NULL; fsRecPtr=fsRecPtr->nextPtr) {
-	if (fsRecPtr->fsPtr != &tclNativeFilesystem) {
-	    continue;
-	}
+
+    if (!isVfsPath) {
 
 	/*
-	 * TODO: Assume that we always find the native file system; it should
-	 * always be there...
+	 * If we have a native filesystem handler, we call it first.  This is
+	 * because the root of Tcl's filesystem is always a native filesystem
+	 * (i.e., '/' on unix is native).
 	 */
 
-	if (fsRecPtr->fsPtr->normalizePathProc != NULL) {
-	    startAt = fsRecPtr->fsPtr->normalizePathProc(interp, pathPtr,
-		    startAt);
+	for (fsRecPtr=firstFsRecPtr; fsRecPtr!=NULL; fsRecPtr=fsRecPtr->nextPtr) {
+	    if (fsRecPtr->fsPtr != &tclNativeFilesystem) {
+		continue;
+	    }
+
+	    /*
+	     * TODO: Assume that we always find the native file system; it should
+	     * always be there...
+	     */
+
+	    if (fsRecPtr->fsPtr->normalizePathProc != NULL) {
+		startAt = fsRecPtr->fsPtr->normalizePathProc(interp, pathPtr,
+			startAt);
+	    }
+	    break;
 	}
-	break;
     }
 
     for (fsRecPtr=firstFsRecPtr; fsRecPtr!=NULL; fsRecPtr=fsRecPtr->nextPtr) {
@@ -1776,7 +1807,7 @@ Tcl_FSEvalFileEx(
      * be handled especially.
      */
 
-    if (Tcl_ReadChars(chan, objPtr, 1, 0) < 0) {
+    if (Tcl_ReadChars(chan, objPtr, 1, 0) == TCL_IO_FAILURE) {
 	Tcl_Close(interp, chan);
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		"couldn't read file \"%s\": %s",
@@ -1791,7 +1822,7 @@ Tcl_FSEvalFileEx(
      */
 
     if (Tcl_ReadChars(chan, objPtr, -1,
-	    memcmp(string, "\xef\xbb\xbf", 3)) < 0) {
+	    memcmp(string, "\xef\xbb\xbf", 3)) == TCL_IO_FAILURE) {
 	Tcl_Close(interp, chan);
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		"couldn't read file \"%s\": %s",
@@ -1911,7 +1942,7 @@ TclNREvalFile(
      * be handled especially.
      */
 
-    if (Tcl_ReadChars(chan, objPtr, 1, 0) < 0) {
+    if (Tcl_ReadChars(chan, objPtr, 1, 0) == TCL_IO_FAILURE) {
 	Tcl_Close(interp, chan);
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		"couldn't read file \"%s\": %s",
@@ -1927,7 +1958,7 @@ TclNREvalFile(
      */
 
     if (Tcl_ReadChars(chan, objPtr, -1,
-	    memcmp(string, "\xef\xbb\xbf", 3)) < 0) {
+	    memcmp(string, "\xef\xbb\xbf", 3)) == TCL_IO_FAILURE) {
 	Tcl_Close(interp, chan);
 	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		"couldn't read file \"%s\": %s",
diff --git a/generic/tclInt.h b/generic/tclInt.h
index a46d5b1..3aeb567 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -2497,16 +2497,16 @@ typedef struct List {
 #else
 #define TclGetLongFromObj(interp, objPtr, longPtr) \
     (((objPtr)->typePtr == &tclIntType \
-	    && (objPtr)->internalRep.wideValue >= -(Tcl_WideInt)(ULONG_MAX) \
-	    && (objPtr)->internalRep.wideValue <= (Tcl_WideInt)(ULONG_MAX))	\
+	    && (objPtr)->internalRep.wideValue >= (Tcl_WideInt)(LONG_MIN) \
+	    && (objPtr)->internalRep.wideValue <= (Tcl_WideInt)(LONG_MAX))	\
 	    ? ((*(longPtr) = (long)(objPtr)->internalRep.wideValue), TCL_OK) \
 	    : Tcl_GetLongFromObj((interp), (objPtr), (longPtr)))
 #endif
 
 #define TclGetIntFromObj(interp, objPtr, intPtr) \
     (((objPtr)->typePtr == &tclIntType \
-	    && (objPtr)->internalRep.wideValue >= -(Tcl_WideInt)(UINT_MAX) \
-	    && (objPtr)->internalRep.wideValue <= (Tcl_WideInt)(UINT_MAX))	\
+	    && (objPtr)->internalRep.wideValue >= (Tcl_WideInt)(INT_MIN) \
+	    && (objPtr)->internalRep.wideValue <= (Tcl_WideInt)(INT_MAX))	\
 	    ? ((*(intPtr) = (int)(objPtr)->internalRep.wideValue), TCL_OK) \
 	    : Tcl_GetIntFromObj((interp), (objPtr), (intPtr)))
 #define TclGetIntForIndexM(interp, objPtr, endValue, idxPtr) \
@@ -2709,8 +2709,11 @@ typedef struct ProcessGlobalValue {
  *----------------------------------------------------------------------
  */
 
-#define TCL_NUMBER_LONG		1
-#define TCL_NUMBER_WIDE		2
+#define TCL_NUMBER_INT		2
+#if (TCL_MAJOR_VERSION < 9) && !defined(TCL_NO_DEPRECATED)
+#   define TCL_NUMBER_LONG		1 /* deprecated, not used any more */
+#   define TCL_NUMBER_WIDE		TCL_NUMBER_INT /* deprecated */
+#endif
 #define TCL_NUMBER_BIG		3
 #define TCL_NUMBER_DOUBLE	4
 #define TCL_NUMBER_NAN		5
@@ -3238,6 +3241,10 @@ MODULE_SCOPE int	TclTrimLeft(const char *bytes, int numBytes,
 			    const char *trim, int numTrim);
 MODULE_SCOPE int	TclTrimRight(const char *bytes, int numBytes,
 			    const char *trim, int numTrim);
+MODULE_SCOPE const char*TclGetCommandTypeName(Tcl_Command command);
+MODULE_SCOPE void	TclRegisterCommandTypeName(
+			    Tcl_ObjCmdProc *implementationProc,
+			    const char *nameStr);
 MODULE_SCOPE int	TclUtfCmp(const char *cs, const char *ct);
 MODULE_SCOPE int	TclUtfCasecmp(const char *cs, const char *ct);
 MODULE_SCOPE int	TclUtfCount(int ch);
@@ -3261,12 +3268,20 @@ MODULE_SCOPE Tcl_WideInt TclpGetWideClicks(void);
 MODULE_SCOPE double	TclpWideClicksToNanoseconds(Tcl_WideInt clicks);
 #endif
 MODULE_SCOPE int	TclZlibInit(Tcl_Interp *interp);
+MODULE_SCOPE int	TclZipfsInit(Tcl_Interp *interp);
+MODULE_SCOPE int        TclZipfsMount(Tcl_Interp *interp, const char *zipname,
+			 const char *mntpt, const char *passwd);
+MODULE_SCOPE int 	TclZipfsUnmount(Tcl_Interp *interp, const char *zipname);
 MODULE_SCOPE void *	TclpThreadCreateKey(void);
 MODULE_SCOPE void	TclpThreadDeleteKey(void *keyPtr);
 MODULE_SCOPE void	TclpThreadSetMasterTSD(void *tsdKeyPtr, void *ptr);
 MODULE_SCOPE void *	TclpThreadGetMasterTSD(void *tsdKeyPtr);
 MODULE_SCOPE void	TclErrorStackResetIf(Tcl_Interp *interp,
 			    const char *msg, int length);
+/* Tip 430 */
+MODULE_SCOPE int    TclZipfs_Init(Tcl_Interp *interp);
+MODULE_SCOPE int    TclZipfs_SafeInit(Tcl_Interp *interp);
+
 
 /*
  *----------------------------------------------------------------
@@ -3348,7 +3363,6 @@ MODULE_SCOPE int	TclNRAssembleObjCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const objv[]);
 MODULE_SCOPE Tcl_Command TclInitEncodingCmd(Tcl_Interp *interp);
-MODULE_SCOPE int	TclMakeEncodingCommandSafe(Tcl_Interp *interp);
 MODULE_SCOPE int	Tcl_EofObjCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const objv[]);
@@ -3377,7 +3391,6 @@ MODULE_SCOPE int	Tcl_FcopyObjCmd(ClientData dummy,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const objv[]);
 MODULE_SCOPE Tcl_Command TclInitFileCmd(Tcl_Interp *interp);
-MODULE_SCOPE int	TclMakeFileCommandSafe(Tcl_Interp *interp);
 MODULE_SCOPE int	Tcl_FileEventObjCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const objv[]);
@@ -4109,6 +4122,19 @@ MODULE_SCOPE TCL_HASH_TYPE TclHashObjKey(Tcl_HashTable *tablePtr, void *keyPtr);
 MODULE_SCOPE int	TclFullFinalizationRequested(void);
 
 /*
+ * Just for the purposes of command-type registration.
+ */
+
+MODULE_SCOPE Tcl_ObjCmdProc TclEnsembleImplementationCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclAliasObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclLocalAliasObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclSlaveObjCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclInvokeImportedCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclOOPublicObjectCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclOOPrivateObjectCmd;
+MODULE_SCOPE Tcl_ObjCmdProc TclOOMyClassObjCmd;
+
+/*
  * TIP #462.
  */
 
@@ -4133,6 +4159,13 @@ MODULE_SCOPE TclProcessWaitStatus TclProcessWait(Tcl_Pid pid, int options,
 			    Tcl_Obj **errorObjPtr);
 
 /*
+ * TIP #508: [array default]
+ */
+
+MODULE_SCOPE void	TclInitArrayVar(Var *arrayPtr);
+MODULE_SCOPE Tcl_Obj *	TclGetArrayDefault(Var *arrayPtr);
+
+/*
  * Utility routines for encoding index values as integers. Used by both
  * some of the command compilers and by [lsort] and [lsearch].
  */
diff --git a/generic/tclInterp.c b/generic/tclInterp.c
index d4bf465..1e75298 100644
--- a/generic/tclInterp.c
+++ b/generic/tclInterp.c
@@ -222,9 +222,6 @@ static int		AliasDelete(Tcl_Interp *interp,
 static int		AliasDescribe(Tcl_Interp *interp,
 			    Tcl_Interp *slaveInterp, Tcl_Obj *objPtr);
 static int		AliasList(Tcl_Interp *interp, Tcl_Interp *slaveInterp);
-static int		AliasObjCmd(ClientData dummy,
-			    Tcl_Interp *currentInterp, int objc,
-			    Tcl_Obj *const objv[]);
 static int		AliasNRCmd(ClientData dummy,
 			    Tcl_Interp *currentInterp, int objc,
 			    Tcl_Obj *const objv[]);
@@ -257,8 +254,6 @@ static int		SlaveInvokeHidden(Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
 static int		SlaveMarkTrusted(Tcl_Interp *interp,
 			    Tcl_Interp *slaveInterp);
-static int		SlaveObjCmd(ClientData dummy, Tcl_Interp *interp,
-			    int objc, Tcl_Obj *const objv[]);
 static void		SlaveObjCmdDeleteProc(ClientData clientData);
 static int		SlaveRecursionLimit(Tcl_Interp *interp,
 			    Tcl_Interp *slaveInterp, int objc,
@@ -414,6 +409,7 @@ Tcl_Init(
 "	} else {\n"
 "	    lappend scripts {::tcl::pkgconfig get scriptdir,runtime}\n"
 "	}\n"
+"	lappend scripts {::tcl::zipfs::tcl_library_init}\n"
 "	lappend scripts {\n"
 "set parentDir [file dirname [file dirname [info nameofexecutable]]]\n"
 "set grandParentDir [file dirname $parentDir]\n"
@@ -1418,7 +1414,8 @@ TclPreventAliasLoop(
      * create or rename the command.
      */
 
-    if (cmdPtr->objProc != AliasObjCmd) {
+    if (cmdPtr->objProc != TclAliasObjCmd
+	    && cmdPtr->objProc != TclLocalAliasObjCmd) {
 	return TCL_OK;
     }
 
@@ -1473,7 +1470,8 @@ TclPreventAliasLoop(
 	 * Otherwise we do not have a loop.
 	 */
 
-	if (aliasCmdPtr->objProc != AliasObjCmd) {
+	if (aliasCmdPtr->objProc != TclAliasObjCmd
+		&& aliasCmdPtr->objProc != TclLocalAliasObjCmd) {
 	    return TCL_OK;
 	}
 	nextAliasPtr = aliasCmdPtr->objClientData;
@@ -1539,12 +1537,12 @@ AliasCreate(
 
     if (slaveInterp == masterInterp) {
 	aliasPtr->slaveCmd = Tcl_NRCreateCommand(slaveInterp,
-		TclGetString(namePtr), AliasObjCmd, AliasNRCmd, aliasPtr,
-		AliasObjCmdDeleteProc);
+		TclGetString(namePtr), TclLocalAliasObjCmd, AliasNRCmd,
+		aliasPtr, AliasObjCmdDeleteProc);
     } else {
-    aliasPtr->slaveCmd = Tcl_CreateObjCommand(slaveInterp,
-	    TclGetString(namePtr), AliasObjCmd, aliasPtr,
-	    AliasObjCmdDeleteProc);
+	aliasPtr->slaveCmd = Tcl_CreateObjCommand(slaveInterp,
+		TclGetString(namePtr), TclAliasObjCmd, aliasPtr,
+		AliasObjCmdDeleteProc);
     }
 
     if (TclPreventAliasLoop(interp, slaveInterp,
@@ -1780,7 +1778,7 @@ AliasList(
 /*
  *----------------------------------------------------------------------
  *
- * AliasObjCmd --
+ * TclAliasObjCmd, TclLocalAliasObjCmd --
  *
  *	This is the function that services invocations of aliases in a slave
  *	interpreter. One such command exists for each alias. When invoked,
@@ -1788,6 +1786,11 @@ AliasList(
  *	master interpreter as designated by the Alias record associated with
  *	this command.
  *
+ *	TclLocalAliasObjCmd is a stripped down version used when the source
+ *	and target interpreters of the alias are the same. That lets a number
+ *	of safety precautions be avoided: the state is much more precisely
+ *	known.
+ *
  * Results:
  *	A standard Tcl result.
  *
@@ -1847,8 +1850,8 @@ AliasNRCmd(
     return Tcl_NREvalObj(interp, listPtr, flags);
 }
 
-static int
-AliasObjCmd(
+int
+TclAliasObjCmd(
     ClientData clientData,	/* Alias record. */
     Tcl_Interp *interp,		/* Current interpreter. */
     int objc,			/* Number of arguments. */
@@ -1937,6 +1940,73 @@ AliasObjCmd(
     return result;
 #undef ALIAS_CMDV_PREALLOC
 }
+
+int
+TclLocalAliasObjCmd(
+    ClientData clientData,	/* Alias record. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument vector. */
+{
+#define ALIAS_CMDV_PREALLOC 10
+    Alias *aliasPtr = clientData;
+    int result, prefc, cmdc, i;
+    Tcl_Obj **prefv, **cmdv;
+    Tcl_Obj *cmdArr[ALIAS_CMDV_PREALLOC];
+    Interp *iPtr = (Interp *) interp;
+    int isRootEnsemble;
+
+    /*
+     * Append the arguments to the command prefix and invoke the command in
+     * the global namespace.
+     */
+
+    prefc = aliasPtr->objc;
+    prefv = &aliasPtr->objPtr;
+    cmdc = prefc + objc - 1;
+    if (cmdc <= ALIAS_CMDV_PREALLOC) {
+	cmdv = cmdArr;
+    } else {
+	cmdv = TclStackAlloc(interp, cmdc * sizeof(Tcl_Obj *));
+    }
+
+    memcpy(cmdv, prefv, (size_t) (prefc * sizeof(Tcl_Obj *)));
+    memcpy(cmdv+prefc, objv+1, (size_t) ((objc-1) * sizeof(Tcl_Obj *)));
+
+    for (i=0; i<cmdc; i++) {
+	Tcl_IncrRefCount(cmdv[i]);
+    }
+
+    /*
+     * Use the ensemble rewriting machinery to ensure correct error messages:
+     * only the source command should show, not the full target prefix.
+     */
+
+    isRootEnsemble = TclInitRewriteEnsemble((Tcl_Interp *)iPtr, 1, prefc, objv);
+
+    /*
+     * Execute the target command in the target interpreter.
+     */
+
+    result = Tcl_EvalObjv(interp, cmdc, cmdv, TCL_EVAL_INVOKE);
+
+    /*
+     * Clean up the ensemble rewrite info if we set it in the first place.
+     */
+
+    if (isRootEnsemble) {
+	TclResetRewriteEnsemble((Tcl_Interp *)iPtr, 1);
+    }
+
+    for (i=0; i<cmdc; i++) {
+	Tcl_DecrRefCount(cmdv[i]);
+    }
+    if (cmdv != cmdArr) {
+	TclStackFree(interp, cmdv);
+    }
+    return result;
+#undef ALIAS_CMDV_PREALLOC
+}
 
 /*
  *----------------------------------------------------------------------
@@ -2376,7 +2446,7 @@ SlaveCreate(
     slavePtr->slaveEntryPtr = hPtr;
     slavePtr->slaveInterp = slaveInterp;
     slavePtr->interpCmd = Tcl_NRCreateCommand(masterInterp, path,
-	    SlaveObjCmd, NRSlaveCmd, slaveInterp, SlaveObjCmdDeleteProc);
+	    TclSlaveObjCmd, NRSlaveCmd, slaveInterp, SlaveObjCmdDeleteProc);
     Tcl_InitHashTable(&slavePtr->aliasTable, TCL_STRING_KEYS);
     Tcl_SetHashValue(hPtr, slavePtr);
     Tcl_SetVar2(slaveInterp, "tcl_interactive", NULL, "0", TCL_GLOBAL_ONLY);
@@ -2444,7 +2514,7 @@ SlaveCreate(
 /*
  *----------------------------------------------------------------------
  *
- * SlaveObjCmd --
+ * TclSlaveObjCmd --
  *
  *	Command to manipulate an interpreter, e.g. to send commands to it to
  *	be evaluated. One such command exists for each slave interpreter.
@@ -2458,8 +2528,8 @@ SlaveCreate(
  *----------------------------------------------------------------------
  */
 
-static int
-SlaveObjCmd(
+int
+TclSlaveObjCmd(
     ClientData clientData,	/* Slave interpreter. */
     Tcl_Interp *interp,		/* Current interpreter. */
     int objc,			/* Number of arguments. */
@@ -2491,7 +2561,7 @@ NRSlaveCmd(
     };
 
     if (slaveInterp == NULL) {
-	Tcl_Panic("SlaveObjCmd: interpreter has been deleted");
+	Tcl_Panic("TclSlaveObjCmd: interpreter has been deleted");
     }
 
     if (objc < 2) {
diff --git a/generic/tclNamesp.c b/generic/tclNamesp.c
index f82d23d..2b8dd51 100644
--- a/generic/tclNamesp.c
+++ b/generic/tclNamesp.c
@@ -89,8 +89,6 @@ static char *		EstablishErrorInfoTraces(ClientData clientData,
 static void		FreeNsNameInternalRep(Tcl_Obj *objPtr);
 static int		GetNamespaceFromObj(Tcl_Interp *interp,
 			    Tcl_Obj *objPtr, Tcl_Namespace **nsPtrPtr);
-static int		InvokeImportedCmd(ClientData clientData,
-			    Tcl_Interp *interp,int objc,Tcl_Obj *const objv[]);
 static int		InvokeImportedNRCmd(ClientData clientData,
 			    Tcl_Interp *interp,int objc,Tcl_Obj *const objv[]);
 static int		NamespaceChildrenCmd(ClientData dummy,
@@ -1766,7 +1764,7 @@ DoImport(
 
 	dataPtr = ckalloc(sizeof(ImportedCmdData));
 	importedCmd = Tcl_NRCreateCommand(interp, Tcl_DStringValue(&ds),
-		InvokeImportedCmd, InvokeImportedNRCmd, dataPtr,
+		TclInvokeImportedCmd, InvokeImportedNRCmd, dataPtr,
 		DeleteImportedCmd);
 	dataPtr->realCmdPtr = cmdPtr;
 	dataPtr->selfPtr = (Command *) importedCmd;
@@ -1987,7 +1985,7 @@ TclGetOriginalCommand(
 /*
  *----------------------------------------------------------------------
  *
- * InvokeImportedCmd --
+ * TclInvokeImportedCmd --
  *
  *	Invoked by Tcl whenever the user calls an imported command that was
  *	created by Tcl_Import. Finds the "real" command (in another
@@ -2018,8 +2016,8 @@ InvokeImportedNRCmd(
     return TclNREvalObjv(interp, objc, objv, TCL_EVAL_NOERR, realCmdPtr);
 }
 
-static int
-InvokeImportedCmd(
+int
+TclInvokeImportedCmd(
     ClientData clientData,	/* Points to the imported command's
 				 * ImportedCmdData structure. */
     Tcl_Interp *interp,		/* Current interpreter. */
diff --git a/generic/tclOO.c b/generic/tclOO.c
index 7702b2b..c8471d5 100644
--- a/generic/tclOO.c
+++ b/generic/tclOO.c
@@ -90,21 +90,12 @@ static inline void	RemoveClass(Class **list, int num, int idx);
 static inline void	RemoveObject(Object **list, int num, int idx);
 static inline void	SquelchCachedName(Object *oPtr);
 
-static int		PublicObjectCmd(ClientData clientData,
-			    Tcl_Interp *interp, int objc,
-			    Tcl_Obj *const *objv);
 static int		PublicNRObjectCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const *objv);
-static int		PrivateObjectCmd(ClientData clientData,
-			    Tcl_Interp *interp, int objc,
-			    Tcl_Obj *const *objv);
 static int		PrivateNRObjectCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const *objv);
-static int		MyClassObjCmd(ClientData clientData,
-			    Tcl_Interp *interp, int objc,
-			    Tcl_Obj *const *objv);
 static int		MyClassNRObjCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const *objv);
@@ -721,10 +712,9 @@ AllocObject(
 	if (nsPtr->parentPtr != NULL) {
 	    nsPtr = nsPtr->parentPtr;
 	}
-
     }
     oPtr->command = TclCreateObjCommandInNs(interp, nameStr,
-	(Tcl_Namespace *)nsPtr, PublicObjectCmd, oPtr, NULL);
+	(Tcl_Namespace *)nsPtr, TclOOPublicObjectCmd, oPtr, NULL);
 
     /*
      * Add the NRE command and trace directly. While this breaks a number of
@@ -741,9 +731,9 @@ AllocObject(
     tracePtr->refCount = 1;
 
     oPtr->myCommand = TclNRCreateCommandInNs(interp, "my", oPtr->namespacePtr,
-	    PrivateObjectCmd, PrivateNRObjectCmd, oPtr, MyDeleted);
+	    TclOOPrivateObjectCmd, PrivateNRObjectCmd, oPtr, MyDeleted);
     oPtr->myclassCommand = TclNRCreateCommandInNs(interp, "myclass",
-	    oPtr->namespacePtr, MyClassObjCmd, MyClassNRObjCmd, oPtr,
+	    oPtr->namespacePtr, TclOOMyClassObjCmd, MyClassNRObjCmd, oPtr,
             MyClassDeleted);
     return oPtr;
 }
@@ -2412,7 +2402,7 @@ Tcl_ObjectSetMetadata(
 /*
  * ----------------------------------------------------------------------
  *
- * PublicObjectCmd, PrivateObjectCmd, TclOOInvokeObject --
+ * TclOOPublicObjectCmd, TclOOPrivateObjectCmd, TclOOInvokeObject --
  *
  *	Main entry point for object invocations. The Public* and Private*
  *	wrapper functions (implementations of both object instance commands
@@ -2422,8 +2412,8 @@ Tcl_ObjectSetMetadata(
  * ----------------------------------------------------------------------
  */
 
-static int
-PublicObjectCmd(
+int
+TclOOPublicObjectCmd(
     ClientData clientData,
     Tcl_Interp *interp,
     int objc,
@@ -2443,8 +2433,8 @@ PublicNRObjectCmd(
 	    NULL);
 }
 
-static int
-PrivateObjectCmd(
+int
+TclOOPrivateObjectCmd(
     ClientData clientData,
     Tcl_Interp *interp,
     int objc,
@@ -2497,15 +2487,15 @@ TclOOInvokeObject(
 /*
  * ----------------------------------------------------------------------
  *
- * MyClassObjCmd, MyClassNRObjCmd --
+ * TclOOMyClassObjCmd, MyClassNRObjCmd --
  *
  *	Special trap door to allow an object to delegate simply to its class.
  *
  * ----------------------------------------------------------------------
  */
 
-static int
-MyClassObjCmd(
+int
+TclOOMyClassObjCmd(
     ClientData clientData,
     Tcl_Interp *interp,
     int objc,
@@ -2888,9 +2878,9 @@ Tcl_GetObjectFromObj(
     if (cmdPtr == NULL) {
 	goto notAnObject;
     }
-    if (cmdPtr->objProc != PublicObjectCmd) {
+    if (cmdPtr->objProc != TclOOPublicObjectCmd) {
 	cmdPtr = (Command *) TclGetOriginalCommand((Tcl_Command) cmdPtr);
-	if (cmdPtr == NULL || cmdPtr->objProc != PublicObjectCmd) {
+	if (cmdPtr == NULL || cmdPtr->objProc != TclOOPublicObjectCmd) {
 	    goto notAnObject;
 	}
     }
diff --git a/generic/tclOODefineCmds.c b/generic/tclOODefineCmds.c
index 3c27236..17680a0 100644
--- a/generic/tclOODefineCmds.c
+++ b/generic/tclOODefineCmds.c
@@ -37,14 +37,17 @@ struct DeclaredSlot {
     const char *name;
     const Tcl_MethodType getterType;
     const Tcl_MethodType setterType;
+    const Tcl_MethodType resolverType;
 };
 
-#define SLOT(name,getter,setter)					\
+#define SLOT(name,getter,setter,resolver)				\
     {"::oo::" name,							\
 	    {TCL_OO_METHOD_VERSION_CURRENT, "core method: " name " Getter", \
 		    getter, NULL, NULL},				\
 	    {TCL_OO_METHOD_VERSION_CURRENT, "core method: " name " Setter", \
-		    setter, NULL, NULL}}
+		    setter, NULL, NULL},				\
+	    {TCL_OO_METHOD_VERSION_CURRENT, "core method: " name " Resolver", \
+		    resolver, NULL, NULL}}
 
 /*
  * Forward declarations.
@@ -109,20 +112,23 @@ static int		ObjVarsGet(ClientData clientData,
 static int		ObjVarsSet(ClientData clientData,
 			    Tcl_Interp *interp, Tcl_ObjectContext context,
 			    int objc, Tcl_Obj *const *objv);
+static int		ResolveClass(ClientData clientData,
+			    Tcl_Interp *interp, Tcl_ObjectContext context,
+			    int objc, Tcl_Obj *const *objv);
 
 /*
  * Now define the slots used in declarations.
  */
 
 static const struct DeclaredSlot slots[] = {
-    SLOT("define::filter",      ClassFilterGet, ClassFilterSet),
-    SLOT("define::mixin",       ClassMixinGet,  ClassMixinSet),
-    SLOT("define::superclass",  ClassSuperGet,  ClassSuperSet),
-    SLOT("define::variable",    ClassVarsGet,   ClassVarsSet),
-    SLOT("objdefine::filter",   ObjFilterGet,   ObjFilterSet),
-    SLOT("objdefine::mixin",    ObjMixinGet,    ObjMixinSet),
-    SLOT("objdefine::variable", ObjVarsGet,     ObjVarsSet),
-    {NULL, {0, 0, 0, 0, 0}, {0, 0, 0, 0, 0}}
+    SLOT("define::filter",      ClassFilterGet, ClassFilterSet, NULL),
+    SLOT("define::mixin",       ClassMixinGet,  ClassMixinSet, ResolveClass),
+    SLOT("define::superclass",  ClassSuperGet,  ClassSuperSet, ResolveClass),
+    SLOT("define::variable",    ClassVarsGet,   ClassVarsSet, NULL),
+    SLOT("objdefine::filter",   ObjFilterGet,   ObjFilterSet, NULL),
+    SLOT("objdefine::mixin",    ObjMixinGet,    ObjMixinSet, ResolveClass),
+    SLOT("objdefine::variable", ObjVarsGet,     ObjVarsSet, NULL),
+    {NULL, {0, 0, 0, 0, 0}, {0, 0, 0, 0, 0}, {0, 0, 0, 0, 0}}
 };
 
 /*
@@ -2063,6 +2069,7 @@ TclOODefineSlots(
     const struct DeclaredSlot *slotInfoPtr;
     Tcl_Obj *getName = Tcl_NewStringObj("Get", -1);
     Tcl_Obj *setName = Tcl_NewStringObj("Set", -1);
+    Tcl_Obj *resolveName = Tcl_NewStringObj("Resolve", -1);
     Class *slotCls;
 
     slotCls = ((Object *) Tcl_NewObjectInstance(fPtr->interp, (Tcl_Class)
@@ -2072,9 +2079,10 @@ TclOODefineSlots(
     }
     Tcl_IncrRefCount(getName);
     Tcl_IncrRefCount(setName);
+    Tcl_IncrRefCount(resolveName);
     for (slotInfoPtr = slots ; slotInfoPtr->name ; slotInfoPtr++) {
 	Tcl_Object slotObject = Tcl_NewObjectInstance(fPtr->interp,
-		(Tcl_Class) slotCls, slotInfoPtr->name, NULL,-1,NULL,0);
+		(Tcl_Class) slotCls, slotInfoPtr->name, NULL, -1, NULL, 0);
 
 	if (slotObject == NULL) {
 	    continue;
@@ -2083,9 +2091,14 @@ TclOODefineSlots(
 		&slotInfoPtr->getterType, NULL);
 	Tcl_NewInstanceMethod(fPtr->interp, slotObject, setName, 0,
 		&slotInfoPtr->setterType, NULL);
+	if (slotInfoPtr->resolverType.callProc) {
+	    Tcl_NewInstanceMethod(fPtr->interp, slotObject, resolveName, 0,
+		    &slotInfoPtr->resolverType, NULL);
+	}
     }
     Tcl_DecrRefCount(getName);
     Tcl_DecrRefCount(setName);
+    Tcl_DecrRefCount(resolveName);
     return TCL_OK;
 }
 
@@ -2815,6 +2828,59 @@ ObjVarsSet(
 }
 
 /*
+ * ----------------------------------------------------------------------
+ *
+ * ResolveClass --
+ *
+ *	Implementation of the "Resolve" support method for some slots (those
+ *	that are slots around a list of classes). This resolves possible class
+ *	names to their fully-qualified names if possible.
+ *
+ * ----------------------------------------------------------------------
+ */
+
+static int
+ResolveClass(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    Tcl_ObjectContext context,
+    int objc,
+    Tcl_Obj *const *objv)
+{
+    int idx = Tcl_ObjectContextSkippedArgs(context);
+    Object *oPtr = (Object *) TclOOGetDefineCmdContext(interp);
+    Class *clsPtr;
+
+    /*
+     * Check if were called wrongly. The definition context isn't used...
+     * except that GetClassInOuterContext() assumes that it is there.
+     */
+
+    if (oPtr == NULL) {
+	return TCL_ERROR;
+    } else if (objc != idx + 1) {
+	Tcl_WrongNumArgs(interp, idx, objv, "slotElement");
+	return TCL_ERROR;
+    }
+
+    /*
+     * Resolve the class if possible. If not, remove any resolution error and
+     * return what we've got anyway as the failure might not be fatal overall.
+     */
+
+    clsPtr = GetClassInOuterContext(interp, objv[idx],
+	    "USER SHOULD NOT SEE THIS MESSAGE");
+    if (clsPtr == NULL) {
+	Tcl_ResetResult(interp);
+	Tcl_SetObjResult(interp, objv[idx]);
+    } else {
+	Tcl_SetObjResult(interp, TclOOObjectName(interp, clsPtr->thisPtr));
+    }
+
+    return TCL_OK;
+}
+
+/*
  * Local Variables:
  * mode: c
  * c-basic-offset: 4
diff --git a/generic/tclOOScript.h b/generic/tclOOScript.h
index e63bd86..2213ce3 100644
--- a/generic/tclOOScript.h
+++ b/generic/tclOOScript.h
@@ -147,12 +147,35 @@ static const char *tclOOSetupScript =
 "\t\tmethod Set list {\n"
 "\t\t\treturn -code error -errorcode {TCLOO ABSTRACT_SLOT} \"unimplemented\"\n"
 "\t\t}\n"
-"\t\tmethod -set args {tailcall my Set $args}\n"
+"\t\tmethod Resolve list {\n"
+"\t\t\treturn $list\n"
+"\t\t}\n"
+"\t\tmethod -set args {\n"
+"\t\t\tset my [namespace which my]\n"
+"\t\t\tset args [lmap a $args {uplevel 1 [list $my Resolve $a]}]\n"
+"\t\t\ttailcall my Set $args\n"
+"\t\t}\n"
 "\t\tmethod -append args {\n"
-"\t\t\tset current [uplevel 1 [list [namespace which my] Get]]\n"
+"\t\t\tset my [namespace which my]\n"
+"\t\t\tset args [lmap a $args {uplevel 1 [list $my Resolve $a]}]\n"
+"\t\t\tset current [uplevel 1 [list $my Get]]\n"
 "\t\t\ttailcall my Set [list {*}$current {*}$args]\n"
 "\t\t}\n"
 "\t\tmethod -clear {} {tailcall my Set {}}\n"
+"\t\tmethod -prepend args {\n"
+"\t\t\tset my [namespace which my]\n"
+"\t\t\tset args [lmap a $args {uplevel 1 [list $my Resolve $a]}]\n"
+"\t\t\tset current [uplevel 1 [list $my Get]]\n"
+"\t\t\ttailcall my Set [list {*}$args {*}$current]\n"
+"\t\t}\n"
+"\t\tmethod -remove args {\n"
+"\t\t\tset my [namespace which my]\n"
+"\t\t\tset args [lmap a $args {uplevel 1 [list $my Resolve $a]}]\n"
+"\t\t\tset current [uplevel 1 [list $my Get]]\n"
+"\t\t\ttailcall my Set [lmap val $current {\n"
+"\t\t\t\tif {$val in $args} continue else {set val}\n"
+"\t\t\t}]\n"
+"\t\t}\n"
 "\t\tforward --default-operation my -append\n"
 "\t\tmethod unknown {args} {\n"
 "\t\t\tset def --default-operation\n"
@@ -163,7 +186,7 @@ static const char *tclOOSetupScript =
 "\t\t\t}\n"
 "\t\t\tnext {*}$args\n"
 "\t\t}\n"
-"\t\texport -set -append -clear\n"
+"\t\texport -set -append -clear -prepend -remove\n"
 "\t\tunexport unknown destroy\n"
 "\t}\n"
 "\tobjdefine define::superclass forward --default-operation my -set\n"
diff --git a/generic/tclOOScript.tcl b/generic/tclOOScript.tcl
index d3706ce..a48eab5 100644
--- a/generic/tclOOScript.tcl
+++ b/generic/tclOOScript.tcl
@@ -276,6 +276,20 @@
 
 	# ------------------------------------------------------------------
 	#
+	# Slot Resolve --
+	#
+	#	Helper that lets a slot convert a list of arguments of a
+	#	particular type to their canonical forms. Defaults to doing
+	#	nothing (suitable for simple strings).
+	#
+	# ------------------------------------------------------------------
+
+	method Resolve list {
+	    return $list
+	}
+
+	# ------------------------------------------------------------------
+	#
 	# Slot -set, -append, -clear, --default-operation --
 	#
 	#	Standard public slot operations. If a slot can't figure out
@@ -283,12 +297,32 @@
 	#
 	# ------------------------------------------------------------------
 
-	method -set args {tailcall my Set $args}
+	method -set args {
+	    set my [namespace which my]
+	    set args [lmap a $args {uplevel 1 [list $my Resolve $a]}]
+	    tailcall my Set $args
+	}
 	method -append args {
-	    set current [uplevel 1 [list [namespace which my] Get]]
+	    set my [namespace which my]
+	    set args [lmap a $args {uplevel 1 [list $my Resolve $a]}]
+	    set current [uplevel 1 [list $my Get]]
 	    tailcall my Set [list {*}$current {*}$args]
 	}
 	method -clear {} {tailcall my Set {}}
+	method -prepend args {
+	    set my [namespace which my]
+	    set args [lmap a $args {uplevel 1 [list $my Resolve $a]}]
+	    set current [uplevel 1 [list $my Get]]
+	    tailcall my Set [list {*}$args {*}$current]
+	}
+	method -remove args {
+	    set my [namespace which my]
+	    set args [lmap a $args {uplevel 1 [list $my Resolve $a]}]
+	    set current [uplevel 1 [list $my Get]]
+	    tailcall my Set [lmap val $current {
+		if {$val in $args} continue else {set val}
+	    }]
+	}
 
 	# Default handling
 	forward --default-operation my -append
@@ -303,7 +337,7 @@
 	}
 
 	# Set up what is exported and what isn't
-	export -set -append -clear
+	export -set -append -clear -prepend -remove
 	unexport unknown destroy
     }
 
diff --git a/generic/tclObj.c b/generic/tclObj.c
index ce326fe..5a8ce3b 100644
--- a/generic/tclObj.c
+++ b/generic/tclObj.c
@@ -2516,7 +2516,7 @@ Tcl_GetIntFromObj(
     if (TclGetLongFromObj(interp, objPtr, &l) != TCL_OK) {
 	return TCL_ERROR;
     }
-    if ((ULONG_MAX > UINT_MAX) && ((l > UINT_MAX) || (l < -(long)UINT_MAX))) {
+    if ((ULONG_MAX > UINT_MAX) && ((l > UINT_MAX) || (l < INT_MIN))) {
 	if (interp != NULL) {
 	    const char *s =
 		    "integer value too large to represent as non-long integer";
@@ -2796,7 +2796,7 @@ Tcl_GetLongFromObj(
 #else
 	if (objPtr->typePtr == &tclIntType) {
 	    /*
-	     * We return any integer in the range -ULONG_MAX to ULONG_MAX
+	     * We return any integer in the range LONG_MIN to ULONG_MAX
 	     * converted to a long, ignoring overflow. The rule preserves
 	     * existing semantics for conversion of integers on input, but
 	     * avoids inadvertent demotion of wide integers to 32-bit ones in
@@ -2805,9 +2805,9 @@ Tcl_GetLongFromObj(
 
 	    Tcl_WideInt w = objPtr->internalRep.wideValue;
 
-	    if (w >= -(Tcl_WideInt)(ULONG_MAX)
+	    if (w >= (Tcl_WideInt)(LONG_MIN)
 		    && w <= (Tcl_WideInt)(ULONG_MAX)) {
-		*longPtr = Tcl_WideAsLong(w);
+		*longPtr = (long) w;
 		return TCL_OK;
 	    }
 	    goto tooLarge;
@@ -2843,11 +2843,16 @@ Tcl_GetLongFromObj(
 			value = (value << CHAR_BIT) | *bytes++;
 		    }
 		    if (big.sign) {
-			*longPtr = - (long) value;
+			if (value <= 1 + (unsigned long)LONG_MAX) {
+			    *longPtr = - (long) value;
+			    return TCL_OK;
+			}
 		    } else {
-			*longPtr = (long) value;
+			if (value <= (unsigned long)ULONG_MAX) {
+			    *longPtr = (long) value;
+			    return TCL_OK;
+			}
 		    }
-		    return TCL_OK;
 		}
 	    }
 #ifndef TCL_WIDE_INT_IS_LONG
@@ -3082,11 +3087,16 @@ Tcl_GetWideIntFromObj(
 			value = (value << CHAR_BIT) | *bytes++;
 		    }
 		    if (big.sign) {
-			*wideIntPtr = - (Tcl_WideInt) value;
+			if (value <= 1 + ~(Tcl_WideUInt)WIDE_MIN) {
+			    *wideIntPtr = - (Tcl_WideInt) value;
+			    return TCL_OK;
+			}
 		    } else {
-			*wideIntPtr = (Tcl_WideInt) value;
+			if (value <= (Tcl_WideUInt)WIDE_MAX) {
+			    *wideIntPtr = (Tcl_WideInt) value;
+			    return TCL_OK;
+			}
 		    }
-		    return TCL_OK;
 		}
 	    }
 	    if (interp != NULL) {
@@ -3158,10 +3168,7 @@ TclGetWideBitsFromObj(
 	    while (numBytes-- > 0) {
 		value = (value << CHAR_BIT) | *bytes++;
 	    }
-	    if (big.sign) {
-		value = -value;
-	    }
-	    *wideIntPtr = (Tcl_WideInt) value;
+	    *wideIntPtr = !big.sign ? (Tcl_WideInt)value : -(Tcl_WideInt)value;
 	    mp_clear(&big);
 	    return TCL_OK;
 	}
@@ -3536,7 +3543,7 @@ Tcl_SetBignumObj(
 	while (numBytes-- > 0) {
 	    value = (value << CHAR_BIT) | *bytes++;
 	}
-	if (value > (((~(Tcl_WideUInt)0) >> 1) + bignumValue->sign)) {
+	if (value > ((Tcl_WideUInt)WIDE_MAX + bignumValue->sign)) {
 	    goto tooLargeForWide;
 	}
 	if (bignumValue->sign) {
@@ -3629,7 +3636,7 @@ TclGetNumberFromObj(
 	    return TCL_OK;
 	}
 	if (objPtr->typePtr == &tclIntType) {
-	    *typePtr = TCL_NUMBER_WIDE;
+	    *typePtr = TCL_NUMBER_INT;
 	    *clientDataPtr = &objPtr->internalRep.wideValue;
 	    return TCL_OK;
 	}
diff --git a/generic/tclPkgConfig.c b/generic/tclPkgConfig.c
index 9e194c8..96b6962 100644
--- a/generic/tclPkgConfig.c
+++ b/generic/tclPkgConfig.c
@@ -105,6 +105,8 @@ static Tcl_Config const cfg[] = {
     {"scriptdir,runtime",	CFG_RUNTIME_SCRDIR},
     {"includedir,runtime",	CFG_RUNTIME_INCDIR},
     {"docdir,runtime",		CFG_RUNTIME_DOCDIR},
+    {"dllfile,runtime",		CFG_RUNTIME_DLLFILE},
+    {"zipfile,runtime",		CFG_RUNTIME_ZIPFILE},
 
     /* Installation paths to various stuff */
 
diff --git a/generic/tclPort.h b/generic/tclPort.h
index 12a60db..d3f6233 100644
--- a/generic/tclPort.h
+++ b/generic/tclPort.h
@@ -24,20 +24,8 @@
 #endif
 #include "tcl.h"
 
-#if !defined(LLONG_MIN)
-#   ifdef TCL_WIDE_INT_IS_LONG
-#      define LLONG_MIN LONG_MIN
-#   else
-#      ifdef LLONG_BIT
-#         define LLONG_MIN ((Tcl_WideInt)(Tcl_LongAsWide(1)<<(LLONG_BIT-1)))
-#      else
-/* Assume we're on a system with a 64-bit 'long long' type */
-#         define LLONG_MIN ((Tcl_WideInt)(Tcl_LongAsWide(1)<<63))
-#      endif
-#   endif
-/* Assume that if LLONG_MIN is undefined, then so is LLONG_MAX */
-#   define LLONG_MAX (~LLONG_MIN)
-#endif
-
+#define UWIDE_MAX ((Tcl_WideUInt)-1)
+#define WIDE_MAX ((Tcl_WideInt)(UWIDE_MAX >> 1))
+#define WIDE_MIN ((Tcl_WideInt)((Tcl_WideUInt)WIDE_MAX+1))
 
 #endif /* _TCLPORT */
diff --git a/generic/tclProc.c b/generic/tclProc.c
index a9eb5be..32c3b2e 100644
--- a/generic/tclProc.c
+++ b/generic/tclProc.c
@@ -611,7 +611,7 @@ TclCreateProc(
 		procPtr->lastLocalPtr = localPtr;
 	    }
 	    localPtr->nextPtr = NULL;
-	    localPtr->nameLength = Tcl_NumUtfChars(argname, fieldValues[0]->length);
+	    localPtr->nameLength = nameLength;
 	    localPtr->frameIndex = i;
 	    localPtr->flags = VAR_ARGUMENT;
 	    localPtr->resolveInfo = NULL;
@@ -688,51 +688,15 @@ TclGetFrame(
     CallFrame **framePtrPtr)	/* Store pointer to frame here (or NULL if
 				 * global frame indicated). */
 {
-    register Interp *iPtr = (Interp *) interp;
-    int curLevel, level, result;
-    CallFrame *framePtr;
-
-    /*
-     * Parse string to figure out which level number to go to.
-     */
-
-    result = 1;
-    curLevel = iPtr->varFramePtr->level;
-    if (*name== '#') {
-	if (Tcl_GetInt(interp, name+1, &level) != TCL_OK || level < 0) {
-	    goto levelError;
-	}
-    } else if (isdigit(UCHAR(*name))) { /* INTL: digit */
-	if (Tcl_GetInt(interp, name, &level) != TCL_OK) {
-	    goto levelError;
-	}
-	level = curLevel - level;
-    } else {
-	level = curLevel - 1;
-	result = 0;
-    }
-
-    /*
-     * Figure out which frame to use, and return it to the caller.
-     */
-
-    for (framePtr = iPtr->varFramePtr; framePtr != NULL;
-	    framePtr = framePtr->callerVarPtr) {
-	if (framePtr->level == level) {
-	    break;
-	}
-    }
-    if (framePtr == NULL) {
-	goto levelError;
-    }
-
-    *framePtrPtr = framePtr;
-    return result;
-
-  levelError:
-    Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad level \"%s\"", name));
-    Tcl_SetErrorCode(interp, "TCL", "VALUE", "STACKLEVEL", NULL);
-    return -1;
+	int result;
+	Tcl_Obj obj;
+
+	obj.bytes = (char *) name;
+	obj.length = strlen(name);
+	obj.typePtr = NULL;
+	result = TclObjGetFrame(interp, &obj, framePtrPtr);
+	TclFreeIntRep(&obj);
+	return result;
 }
 
 /*
@@ -770,6 +734,7 @@ TclObjGetFrame(
     register Interp *iPtr = (Interp *) interp;
     int curLevel, level, result;
     const char *name = NULL;
+    Tcl_WideInt w;
 
     /*
      * Parse object to figure out which level number to go to.
@@ -785,25 +750,33 @@ TclObjGetFrame(
 
     if (objPtr == NULL) {
 	/* Do nothing */
-    } else if (TCL_OK == Tcl_GetIntFromObj(NULL, objPtr, &level)
-	    && (level >= 0)) {
-	level = curLevel - level;
-	result = 1;
+    } else if (TCL_OK == Tcl_GetIntFromObj(NULL, objPtr, &level)) {
+	Tcl_GetWideIntFromObj(NULL, objPtr, &w);
+	if (w < 0 || w > INT_MAX || curLevel > w + INT_MAX) {
+	    result = -1;
+	} else {
+	    level = curLevel - level;
+	    result = 1;
+	}
     } else if (objPtr->typePtr == &levelReferenceType) {
 	level = (int) objPtr->internalRep.wideValue;
 	result = 1;
     } else {
 	name = TclGetString(objPtr);
 	if (name[0] == '#') {
-	    if (TCL_OK == Tcl_GetInt(NULL, name+1, &level) && level >= 0) {
-		TclFreeIntRep(objPtr);
-		objPtr->typePtr = &levelReferenceType;
-		objPtr->internalRep.wideValue = level;
-		result = 1;
+	    if (TCL_OK == Tcl_GetInt(NULL, name+1, &level)) {
+		if (level < 0 || (level > 0 && name[1] == '-')) {
+		    result = -1;
+		} else {
+		    TclFreeIntRep(objPtr);
+		    objPtr->typePtr = &levelReferenceType;
+		    objPtr->internalRep.wideValue = level;
+		    result = 1;
+		}
 	    } else {
 		result = -1;
 	    }
-	} else if (isdigit(UCHAR(name[0]))) { /* INTL: digit */
+	} else if (TclGetWideBitsFromObj(interp, objPtr, &w) == TCL_OK) {
 	    /*
 	     * If this were an integer, we'd have succeeded already.
 	     * Docs say we have to treat this as a 'bad level'  error.
@@ -814,7 +787,6 @@ TclObjGetFrame(
 
     if (result == 0) {
 	level = curLevel - 1;
-	name = "1";
     }
     if (result != -1) {
 	if (level >= 0) {
@@ -827,11 +799,11 @@ TclObjGetFrame(
 		}
 	    }
 	}
-	if (name == NULL) {
-	    name = TclGetString(objPtr);
-	}
     }
 
+    if (name == NULL) {
+	name = TclGetString(objPtr);
+    }
     Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad level \"%s\"", name));
     Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "LEVEL", name, NULL);
     return -1;
@@ -1035,7 +1007,6 @@ ProcWrongNumArgs(
 {
     CallFrame *framePtr = ((Interp *)interp)->varFramePtr;
     register Proc *procPtr = framePtr->procPtr;
-    register Var *defPtr;
     int localCt = procPtr->numCompiledLocals, numArgs, i;
     Tcl_Obj **desiredObjs;
     const char *final = NULL;
@@ -1059,23 +1030,26 @@ ProcWrongNumArgs(
     }
     Tcl_IncrRefCount(desiredObjs[0]);
 
-    defPtr = (Var *) (&framePtr->localCachePtr->varName0 + localCt);
-    for (i=1 ; i<=numArgs ; i++, defPtr++) {
-	Tcl_Obj *argObj;
-	Tcl_Obj *namePtr = localName(framePtr, i-1);
-
-	if (defPtr->value.objPtr != NULL) {
-	    TclNewObj(argObj);
-	    Tcl_AppendStringsToObj(argObj, "?", TclGetString(namePtr), "?", NULL);
-	} else if (defPtr->flags & VAR_IS_ARGS) {
-	    numArgs--;
-	    final = "?arg ...?";
-	    break;
-	} else {
-	    argObj = namePtr;
-	    Tcl_IncrRefCount(namePtr);
+    if (localCt > 0) {
+	register Var *defPtr = (Var *) (&framePtr->localCachePtr->varName0 + localCt);
+
+	for (i=1 ; i<=numArgs ; i++, defPtr++) {
+	    Tcl_Obj *argObj;
+	    Tcl_Obj *namePtr = localName(framePtr, i-1);
+
+	    if (defPtr->value.objPtr != NULL) {
+		TclNewObj(argObj);
+		Tcl_AppendStringsToObj(argObj, "?", TclGetString(namePtr), "?", NULL);
+	    } else if (defPtr->flags & VAR_IS_ARGS) {
+		numArgs--;
+		final = "?arg ...?";
+		break;
+	    } else {
+		argObj = namePtr;
+		Tcl_IncrRefCount(namePtr);
+	    }
+	    desiredObjs[i] = argObj;
 	}
-	desiredObjs[i] = argObj;
     }
 
     Tcl_ResetResult(interp);
diff --git a/generic/tclScan.c b/generic/tclScan.c
index 0e3da17..733409e 100644
--- a/generic/tclScan.c
+++ b/generic/tclScan.c
@@ -926,9 +926,9 @@ Tcl_ScanObjCmd(
 	    }
 	    if (flags & SCAN_LONGER) {
 		if (Tcl_GetWideIntFromObj(NULL, objPtr, &wideValue) != TCL_OK) {
-		    wideValue = LLONG_MAX;
+		    wideValue = WIDE_MAX;
 		    if (TclGetString(objPtr)[0] == '-') {
-			wideValue = LLONG_MIN;
+			wideValue = WIDE_MIN;
 		    }
 		}
 		if ((flags & SCAN_UNSIGNED) && (wideValue < 0)) {
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index f238268..fa55bb0 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -2107,7 +2107,7 @@ Tcl_AppendFormatToObj(
 		if (TclGetWideBitsFromObj(interp, segment, &w) != TCL_OK) {
 		    goto error;
 		} else {
-		    l = Tcl_WideAsLong(w);
+		    l = (long) w;
 		}
 		if (useShort) {
 		    s = (short) l;
diff --git a/generic/tclStubInit.c b/generic/tclStubInit.c
index c4706df..6a4eabc 100644
--- a/generic/tclStubInit.c
+++ b/generic/tclStubInit.c
@@ -12,6 +12,10 @@
 #include "tclInt.h"
 #include "tommath.h"
 
+#ifdef __CYGWIN__
+#   include <wchar.h>
+#endif
+
 #ifdef __GNUC__
 #pragma GCC dependency "tcl.decls"
 #pragma GCC dependency "tclInt.decls"
@@ -225,17 +229,11 @@ Tcl_WinUtfToTChar(
     int len,
     Tcl_DString *dsPtr)
 {
-    WCHAR *wp;
-    int size = MultiByteToWideChar(CP_UTF8, 0, string, len, 0, 0);
-
     Tcl_DStringInit(dsPtr);
-    Tcl_DStringSetLength(dsPtr, 2*size+2);
-    wp = (WCHAR *)Tcl_DStringValue(dsPtr);
-    MultiByteToWideChar(CP_UTF8, 0, string, len, wp, size+1);
-    if (len == -1) --size; /* account for 0-byte at string end */
-    Tcl_DStringSetLength(dsPtr, 2*size);
-    wp[size] = 0;
-    return (char *)wp;
+    if (!string) {
+	return NULL;
+    }
+    return (char *)Tcl_UtfToUniCharDString(string, len, dsPtr);
 }
 
 char *
@@ -244,21 +242,16 @@ Tcl_WinTCharToUtf(
     int len,
     Tcl_DString *dsPtr)
 {
-    char *p;
-    int size;
-
-    if (len > 0) {
+    Tcl_DStringInit(dsPtr);
+    if (!string) {
+	return NULL;
+    }
+    if (len < 0) {
+	len = wcslen((wchar_t *)string);
+    } else {
 	len /= 2;
     }
-    size = WideCharToMultiByte(CP_UTF8, 0, string, len, 0, 0, NULL, NULL);
-    Tcl_DStringInit(dsPtr);
-    Tcl_DStringSetLength(dsPtr, size+1);
-    p = (char *)Tcl_DStringValue(dsPtr);
-    WideCharToMultiByte(CP_UTF8, 0, string, len, p, size, NULL, NULL);
-    if (len == -1) --size; /* account for 0-byte at string end */
-    Tcl_DStringSetLength(dsPtr, size);
-    p[size] = 0;
-    return p;
+    return Tcl_UniCharToUtfDString((Tcl_UniChar *)string, len, dsPtr);
 }
 
 #if defined(TCL_WIDE_INT_IS_LONG)
@@ -271,7 +264,7 @@ static int exprInt(Tcl_Interp *interp, const char *expr, int *ptr){
     long longValue;
     int result = Tcl_ExprLong(interp, expr, &longValue);
     if (result == TCL_OK) {
-	    if ((longValue >= -(long)(UINT_MAX))
+	    if ((longValue >= (long)(INT_MIN))
 		    && (longValue <= (long)(UINT_MAX))) {
 	    *ptr = (int)longValue;
 	} else {
@@ -287,7 +280,7 @@ static int exprIntObj(Tcl_Interp *interp, Tcl_Obj*expr, int *ptr){
     long longValue;
     int result = Tcl_ExprLongObj(interp, expr, &longValue);
     if (result == TCL_OK) {
-	    if ((longValue >= -(long)(UINT_MAX))
+	    if ((longValue >= (long)(INT_MIN))
 		    && (longValue <= (long)(UINT_MAX))) {
 	    *ptr = (int)longValue;
 	} else {
@@ -431,20 +424,14 @@ seekOld(
     int offset,			/* Offset to seek to. */
     int mode)			/* Relative to which location to seek? */
 {
-    Tcl_WideInt wOffset, wResult;
-
-    wOffset = Tcl_LongAsWide((long) offset);
-    wResult = Tcl_Seek(chan, wOffset, mode);
-    return (int) Tcl_WideAsLong(wResult);
+    return Tcl_Seek(chan, offset, mode);
 }
 
 static int
 tellOld(
     Tcl_Channel chan)		/* The channel to return pos for. */
 {
-    Tcl_WideInt wResult = Tcl_Tell(chan);
-
-    return (int) Tcl_WideAsLong(wResult);
+    return Tcl_Tell(chan);
 }
 #endif /* !TCL_NO_DEPRECATED */
 
@@ -1590,6 +1577,10 @@ const TclStubs tclStubs = {
     Tcl_FSUnloadFile, /* 629 */
     Tcl_ZlibStreamSetCompressionDictionary, /* 630 */
     Tcl_OpenTcpServerEx, /* 631 */
+    TclZipfs_Mount, /* 632 */
+    TclZipfs_Unmount, /* 633 */
+    TclZipfs_TclLibrary, /* 634 */
+    TclZipfs_MountBuffer, /* 635 */
 };
 
 /* !END!: Do not edit above this line. */
diff --git a/generic/tclTest.c b/generic/tclTest.c
index 48b4761..18bfc1b 100644
--- a/generic/tclTest.c
+++ b/generic/tclTest.c
@@ -2832,7 +2832,7 @@ TestlinkCmd(
     static int intVar = 43;
     static int boolVar = 4;
     static double realVar = 1.23;
-    static Tcl_WideInt wideVar = Tcl_LongAsWide(79);
+    static Tcl_WideInt wideVar = 79;
     static char *stringVar = NULL;
     static char charVar = '@';
     static unsigned char ucharVar = 130;
@@ -2842,7 +2842,7 @@ TestlinkCmd(
     static long longVar = 123456789L;
     static unsigned long ulongVar = 3456789012UL;
     static float floatVar = 4.5;
-    static Tcl_WideUInt uwideVar = (Tcl_WideUInt) Tcl_LongAsWide(123);
+    static Tcl_WideUInt uwideVar = 123;
     static int created = 0;
     char buffer[2*TCL_DOUBLE_SPACE];
     int writable, flag;
diff --git a/generic/tclUtf.c b/generic/tclUtf.c
index c8292a2..ce67db7 100644
--- a/generic/tclUtf.c
+++ b/generic/tclUtf.c
@@ -225,7 +225,7 @@ Tcl_UniCharToUtfDString(
      */
 
     oldLength = Tcl_DStringLength(dsPtr);
-    Tcl_DStringSetLength(dsPtr, (oldLength + uniLength + 1) * 4);
+    Tcl_DStringSetLength(dsPtr, oldLength + (uniLength + 1) * 4);
     string = Tcl_DStringValue(dsPtr) + oldLength;
 
     p = string;
@@ -434,20 +434,32 @@ Tcl_UtfToUniCharDString(
      */
 
     oldLength = Tcl_DStringLength(dsPtr);
-/* TODO: fix overreach! */
+
     Tcl_DStringSetLength(dsPtr,
-	    (int) ((oldLength + length + 1) * sizeof(Tcl_UniChar)));
+	    oldLength + (int) ((length + 1) * sizeof(Tcl_UniChar)));
     wString = (Tcl_UniChar *) (Tcl_DStringValue(dsPtr) + oldLength);
 
     w = wString;
-    end = src + length;
-    for (p = src; p < end; ) {
+    p = src;
+    end = src + length - 4;
+    while (p < end) {
 	p += TclUtfToUniChar(p, &ch);
 	*w++ = ch;
     }
+    end += 4;
+    while (p < end) {
+	if (Tcl_UtfCharComplete(p, end-p)) {
+	    p += TclUtfToUniChar(p, &ch);
+	} else if ((unsigned)((UCHAR(*p)-0x80)) < (unsigned) 0x20) {
+	    ch = (Tcl_UniChar) cp1252[UCHAR(*p++)-0x80];
+	} else {
+	    ch = UCHAR(*p++);
+	}
+	*w++ = ch;
+    }
     *w = '\0';
     Tcl_DStringSetLength(dsPtr,
-	    (oldLength + ((char *) w - (char *) wString)));
+	    oldLength + ((char *) w - (char *) wString));
 
     return wString;
 }
@@ -771,8 +783,8 @@ Tcl_UniCharAtIndex(
  *
  *	Returns a pointer to the specified character (not byte) position in
  *	the UTF-8 string. If TCL_UTF_MAX <= 4, characters > U+FFFF count as
- *      2 positions, but then the pointer should never be placed between
- *      the two positions.
+ *	2 positions, but then the pointer should never be placed between
+ *	the two positions.
  *
  * Results:
  *	As above.
diff --git a/generic/tclUtil.c b/generic/tclUtil.c
index 48602c4..4ea9c2e 100644
--- a/generic/tclUtil.c
+++ b/generic/tclUtil.c
@@ -15,6 +15,7 @@
 #include "tclInt.h"
 #include "tclParse.h"
 #include "tclStringTrim.h"
+#include "tommath.h"
 #include <math.h>
 
 /*
@@ -107,9 +108,11 @@ static Tcl_ThreadDataKey precisionKey;
 static void		ClearHash(Tcl_HashTable *tablePtr);
 static void		FreeProcessGlobalValue(ClientData clientData);
 static void		FreeThreadHash(ClientData clientData);
-static int		GetEndOffsetFromObj(Tcl_Obj *objPtr, int endValue,
-			    int *indexPtr);
+static int		GetEndOffsetFromObj(Tcl_Obj *objPtr,
+			    Tcl_WideInt endValue, Tcl_WideInt *indexPtr);
 static Tcl_HashTable *	GetThreadHash(Tcl_ThreadDataKey *keyPtr);
+static int		GetWideForIndex(Tcl_Interp *interp, Tcl_Obj *objPtr,
+			    Tcl_WideInt endValue, Tcl_WideInt *widePtr);
 static int		SetEndOffsetFromAny(Tcl_Interp *interp,
 			    Tcl_Obj *objPtr);
 static int		FindElement(Tcl_Interp *interp, const char *string,
@@ -3654,6 +3657,204 @@ TclFormatInt(
 /*
  *----------------------------------------------------------------------
  *
+ * GetWideForIndex --
+ *
+ *	This function produces a wide integer value corresponding to the
+ *	list index held in *objPtr. The parsing supports all values 
+ *	recognized as any size of integer, and the syntaxes end[-+]$integer
+ *	and $integer[-+]$integer. The argument endValue is used to give
+ *	the meaning of the literal index value "end".
+ *
+ * Results:
+ *	When parsing of *objPtr successfully recognizes an index value,
+ *	TCL_OK is returned, and the wide integer value corresponding to
+ *	the recognized index value is written to *widePtr. When parsing
+ *	fails, TCL_ERROR is returned and error information is written to
+ *	interp, if non-NULL.
+ *
+ * Side effects:
+ *	The type of *objPtr may change.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+GetWideForIndex(
+    Tcl_Interp *interp,         /* Interpreter to use for error reporting. If
+                                 * NULL, then no error message is left after
+                                 * errors. */
+    Tcl_Obj *objPtr,            /* Points to the value to be parsed */
+    Tcl_WideInt endValue,       /* The value to be stored at *widePtr if
+                                 * objPtr holds "end".
+				 * NOTE: this value may be negative. */
+    Tcl_WideInt *widePtr)       /* Location filled in with a wide integer
+                                 * representing an index. */
+{
+    ClientData cd;
+    const char *opPtr;
+    int numType, length, t1 = 0, t2 = 0;
+    int code = TclGetNumberFromObj(NULL, objPtr, &cd, &numType);
+
+    if (code == TCL_OK) {
+	if (numType == TCL_NUMBER_INT) {
+	    /* objPtr holds an integer in the signed wide range */
+	    *widePtr = (Tcl_WideInt)(*(Tcl_WideInt *)cd);
+	    return TCL_OK;
+	}
+	if (numType == TCL_NUMBER_BIG) {
+	    /* objPtr holds an integer outside the signed wide range */
+	    /* Truncate to the signed wide range. */
+	    if (mp_isneg((mp_int *)cd)) {
+		*widePtr = LLONG_MIN;
+	    } else {
+		*widePtr = LLONG_MAX;
+	    }
+	    return TCL_OK;
+	}
+	/* Must be a double -> not a valid index */
+	goto parseError;
+    }
+
+    /* objPtr does not hold a number, check the end+/- format... */
+    if (GetEndOffsetFromObj(objPtr, endValue, widePtr) == TCL_OK) {
+	return TCL_OK;
+    }
+
+    /* If we reach here, the string rep of objPtr exists. */
+
+    /*
+     * The valid index syntax does not include any value that is
+     * a list of more than one element. This is necessary so that
+     * lists of index values can be reliably distinguished from any
+     * single index value.
+     */
+
+    /*
+     * Quick scan to see if multi-value list is even possible.
+     * This relies on TclGetString() returning a NUL-terminated string.
+     */
+    if ((TclMaxListLength(TclGetString(objPtr), -1, NULL) > 1)
+
+	    /* If it's possible, do the full list parse. */
+            && (TCL_OK == Tcl_ListObjLength(NULL, objPtr, &length))
+            && (length > 1)) {
+        goto parseError;
+    }
+
+    /* Passed the list screen, so parse for index arithmetic expression */
+    if (TCL_OK == TclParseNumber(NULL, objPtr, NULL, NULL, -1, &opPtr,
+            TCL_PARSE_INTEGER_ONLY)) {
+	Tcl_WideInt w1=0, w2=0;
+
+	/* value starts with valid integer... */
+
+        if ((*opPtr == '-') || (*opPtr == '+')) {
+	    /* ... value continues with [-+] ... */
+
+	    /* Save first integer as wide if possible */
+	    TclGetNumberFromObj(NULL, objPtr, &cd, &t1);
+	    if (t1 == TCL_NUMBER_INT) {
+		w1 = (*(Tcl_WideInt *)cd);
+	    }
+
+	    if (TCL_OK == TclParseNumber(NULL, objPtr, NULL, opPtr + 1,
+		    -1, NULL, TCL_PARSE_INTEGER_ONLY)) {
+		/* ... value concludes with second valid integer */
+
+		/* Save second integer as wide if possible */
+		TclGetNumberFromObj(NULL, objPtr, &cd, &t2);
+		if (t2 == TCL_NUMBER_INT) {
+		    w2 = (*(Tcl_WideInt *)cd);
+		}
+	    }
+        }
+	/* Clear invalid intreps left by TclParseNumber */
+	TclFreeIntRep(objPtr);
+
+	if (t1 && t2) {
+	    /* We have both integer values */
+	    if ((t1 == TCL_NUMBER_INT) && (t2 == TCL_NUMBER_INT)) {
+		/* Both are wide, do wide-integer math */
+		if (*opPtr == '-') {
+		    if ((w2 == LLONG_MIN) && (interp != NULL)) {
+			goto extreme;
+		    }
+		    w2 = -w2;
+		}
+
+		if ((w1 ^ w2) < 0) {
+		    /* Different signs, sum cannot overflow */
+		    *widePtr = w1 + w2;
+		} else if (w1 >= 0) {
+		    if (w1 < LLONG_MAX - w2) {
+			*widePtr = w1 + w2;
+		    } else {
+			*widePtr = LLONG_MAX;
+		    }
+		} else {
+		    if (w1 > LLONG_MIN - w2) {
+			*widePtr = w1 + w2;
+		    } else {
+			*widePtr = LLONG_MIN;
+		    }
+		}
+	    } else if (interp == NULL) {
+		/*
+		 * We use an interp to do bignum index calculations.
+		 * If we don't get one, call all indices with bignums errors,
+		 * and rely on callers to handle it.
+		 */
+		return TCL_ERROR;
+	    } else {
+		/*
+		 * At least one is big, do bignum math. Little reason to
+		 * value performance here. Re-use code.  Parse has verified
+		 * objPtr is an expression. Compute it.
+		 */
+
+		Tcl_Obj *sum;
+
+	    extreme:
+		Tcl_ExprObj(interp, objPtr, &sum);
+		TclGetNumberFromObj(NULL, sum, &cd, &numType);
+
+		if (numType == TCL_NUMBER_INT) {
+		    /* sum holds an integer in the signed wide range */
+		    *widePtr = (Tcl_WideInt)(*(Tcl_WideInt *)cd);
+		} else {
+		    /* sum holds an integer outside the signed wide range */
+		    /* Truncate to the signed wide range. */
+		    if (mp_isneg((mp_int *)cd)) {
+			*widePtr = LLONG_MIN;
+		    } else {
+			*widePtr = LLONG_MAX;
+		    }
+		}
+		Tcl_DecrRefCount(sum);
+	    }
+	    return TCL_OK;
+	}
+    }
+
+    /* Report a parse error. */
+  parseError:
+    if (interp != NULL) {
+        char * bytes = TclGetString(objPtr);
+        Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+                "bad index \"%s\": must be integer?[+-]integer? or"
+                " end?[+-]integer?", bytes));
+        if (!strncmp(bytes, "end-", 4)) {
+            bytes += 4;
+        }
+        TclCheckBadOctal(interp, bytes);
+        Tcl_SetErrorCode(interp, "TCL", "VALUE", "INDEX", NULL);
+    }
+    return TCL_ERROR;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * TclGetIntForIndex --
  *
  *	This function returns an integer corresponding to the list index held
@@ -3687,76 +3888,19 @@ TclGetIntForIndex(
     int *indexPtr)		/* Location filled in with an integer
 				 * representing an index. */
 {
-    size_t length;
-    char *opPtr;
-    const char *bytes;
-
-    if (TclGetIntFromObj(NULL, objPtr, indexPtr) == TCL_OK) {
-	return TCL_OK;
-    }
-
-    if (GetEndOffsetFromObj(objPtr, endValue, indexPtr) == TCL_OK) {
-	return TCL_OK;
-    }
-
-    bytes = TclGetString(objPtr);
-    length = objPtr->length;
-
-    /*
-     * Leading whitespace is acceptable in an index.
-     */
-
-    while (length && TclIsSpaceProc(*bytes)) {
-	bytes++;
-	length--;
-    }
-
-    if (TclParseNumber(NULL, NULL, NULL, bytes, length, (const char **)&opPtr,
-	    TCL_PARSE_INTEGER_ONLY | TCL_PARSE_NO_WHITESPACE) == TCL_OK) {
-	int code, first, second;
-	char savedOp = *opPtr;
+    Tcl_WideInt wide;
 
-	if ((savedOp != '+') && (savedOp != '-')) {
-	    goto parseError;
-	}
-	if (TclIsSpaceProc(opPtr[1])) {
-	    goto parseError;
-	}
-	*opPtr = '\0';
-	code = Tcl_GetInt(interp, bytes, &first);
-	*opPtr = savedOp;
-	if (code == TCL_ERROR) {
-	    goto parseError;
-	}
-	if (TCL_ERROR == Tcl_GetInt(interp, opPtr+1, &second)) {
-	    goto parseError;
-	}
-	if (savedOp == '+') {
-	    *indexPtr = first + second;
-	} else {
-	    *indexPtr = first - second;
-	}
-	return TCL_OK;
+    if (GetWideForIndex(interp, objPtr, endValue, &wide) == TCL_ERROR) {
+	return TCL_ERROR;
     }
-
-    /*
-     * Report a parse error.
-     */
-
-  parseError:
-    if (interp != NULL) {
-	bytes = TclGetString(objPtr);
-	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
-		"bad index \"%s\": must be integer?[+-]integer? or"
-		" end?[+-]integer?", bytes));
-	if (!strncmp(bytes, "end-", 4)) {
-	    bytes += 4;
-	}
-	TclCheckBadOctal(interp, bytes);
-	Tcl_SetErrorCode(interp, "TCL", "VALUE", "INDEX", NULL);
+    if (wide < INT_MIN) {
+	*indexPtr = INT_MIN;
+    } else if (wide > INT_MAX) {
+	*indexPtr = INT_MAX;
+    } else {
+	*indexPtr = (int) wide;
     }
-
-    return TCL_ERROR;
+    return TCL_OK;
 }
 
 /*
@@ -3779,21 +3923,35 @@ TclGetIntForIndex(
 static int
 GetEndOffsetFromObj(
     Tcl_Obj *objPtr,            /* Pointer to the object to parse */
-    int endValue,               /* The value to be stored at "indexPtr" if
+    Tcl_WideInt endValue,       /* The value to be stored at "indexPtr" if
                                  * "objPtr" holds "end". */
-    int *indexPtr)              /* Location filled in with an integer
+    Tcl_WideInt *widePtr)       /* Location filled in with an integer
                                  * representing an index. */
 {
-    if (SetEndOffsetFromAny(NULL, objPtr) != TCL_OK) {
-	return TCL_ERROR;
+    if (SetEndOffsetFromAny(NULL, objPtr) == TCL_OK) {
+        Tcl_WideInt offset = objPtr->internalRep.wideValue;
+
+        if ((endValue ^ offset) < 0) {
+            /* Different signs, sum cannot overflow */
+            *widePtr = endValue + offset;
+        } else if (endValue >= 0) {
+            if (endValue < LLONG_MAX - offset) {
+                *widePtr = endValue + offset;
+            } else {
+                *widePtr = LLONG_MAX;
+            }
+	} else {
+            if (endValue > LLONG_MIN - offset) {
+                *widePtr = endValue + offset;
+            } else {
+                *widePtr = LLONG_MIN;
+            }
+	}
+	return TCL_OK;
     }
-
-    /* TODO: Handle overflow cases sensibly */
-    *indexPtr = endValue + (int)objPtr->internalRep.wideValue;
-    return TCL_OK;
+    return TCL_ERROR;
 }
 
-
 /*
  *----------------------------------------------------------------------
  *
@@ -3961,43 +4119,48 @@ TclIndexEncode(
     int after,		/* Value to return for index after end */
     int *indexPtr)	/* Where to write the encoded answer, not NULL */
 {
-    int idx;
+    ClientData cd;
+    Tcl_WideInt wide;
+    int idx, numType, code = TclGetNumberFromObj(NULL, objPtr, &cd, &numType);
 
-    if (TCL_OK == TclGetIntFromObj(NULL, objPtr, &idx)) {
-        /* We parsed a value in the range INT_MIN...INT_MAX */
+    if ((code == TCL_OK) && (numType == TCL_NUMBER_INT)) {
+        /* We parsed a value in the range LLONG_MIN...LLONG_MAX */
+	wide = (*(Tcl_WideInt *)cd);
     integerEncode:
-        if (idx < TCL_INDEX_START) {
+        if (wide < TCL_INDEX_START) {
             /* All negative absolute indices are "before the beginning" */
             idx = before;
-        } else if (idx == INT_MAX) {
+        } else if (wide >= INT_MAX) {
             /* This index value is always "after the end" */
             idx = after;
-        }
+        } else {
+	    idx = (int) wide;
+	}
         /* usual case, the absolute index value encodes itself */
-    } else if (TCL_OK == GetEndOffsetFromObj(objPtr, 0, &idx)) {
+    } else if (TCL_OK == GetEndOffsetFromObj(objPtr, 0, &wide)) {
         /*
          * We parsed an end+offset index value.
-         * idx holds the offset value in the range INT_MIN...INT_MAX.
+         * wide holds the offset value in the range LLONG_MIN...LLONG_MAX.
          */
-        if (idx > 0) {
+        if (wide > 0) {
             /*
              * All end+postive or end-negative expressions
              * always indicate "after the end".
              */
             idx = after;
-        } else if (idx < INT_MIN - TCL_INDEX_END) {
+        } else if (wide < INT_MIN - TCL_INDEX_END) {
             /* These indices always indicate "before the beginning */
             idx = before;
         } else {
             /* Encoded end-positive (or end+negative) are offset */
-            idx += TCL_INDEX_END;
+            idx = (int)wide + TCL_INDEX_END;
         }
 
     /* TODO: Consider flag to suppress repeated end-offset parse. */
-    } else if (TCL_OK == TclGetIntForIndexM(interp, objPtr, 0, &idx)) {
+    } else if (TCL_OK == GetWideForIndex(interp, objPtr, 0, &wide)) {
         /*
          * Only reach this case when the index value is a
-         * constant index arithmetic expression, and idx
+         * constant index arithmetic expression, and wide
          * holds the result. Treat it the same as if it were
          * parsed as an absolute integer value.
          */
@@ -4316,7 +4479,7 @@ TclGetProcessGlobalValue(
 	    ckfree(pgvPtr->value);
 	    pgvPtr->value = ckalloc(Tcl_DStringLength(&newValue) + 1);
 	    memcpy(pgvPtr->value, Tcl_DStringValue(&newValue),
-		    (size_t) Tcl_DStringLength(&newValue) + 1);
+		    Tcl_DStringLength(&newValue) + 1);
 	    Tcl_DStringFree(&newValue);
 	    Tcl_FreeEncoding(pgvPtr->encoding);
 	    pgvPtr->encoding = current;
diff --git a/generic/tclVar.c b/generic/tclVar.c
index 4dc227d..cafa6a3 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -165,6 +165,18 @@ typedef struct ArraySearch {
 } ArraySearch;
 
 /*
+ * TIP #508: [array default]
+ *
+ * The following structure extends the regular TclVarHashTable used by array
+ * variables to store their optional default value.
+ */
+
+typedef struct ArrayVarHashTable {
+    TclVarHashTable table;
+    Tcl_Obj *defaultObj;
+} ArrayVarHashTable;
+
+/*
  * Forward references to functions defined later in this file:
  */
 
@@ -198,6 +210,16 @@ static void		UnsetVarStruct(Var *varPtr, Var *arrayPtr,
 			    Tcl_Obj *part2Ptr, int flags, int index);
 
 /*
+ * TIP #508: [array default]
+ */
+
+static int		ArrayDefaultCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
+static void		DeleteArrayVar(Var *arrayPtr);
+static void		SetArrayDefault(Var *arrayPtr, Tcl_Obj *defaultObj);
+
+/*
  * Functions defined in this file that may be exported in the future for use
  * by the bytecode compiler and engine or to the public interface.
  */
@@ -236,7 +258,6 @@ static const Tcl_ObjType tclParsedVarNameType = {
     "parsedVarName",
     FreeParsedVarName, DupParsedVarName, NULL, NULL
 };
-
 
 Var *
 TclVarHashCreateVar(
@@ -916,20 +937,24 @@ TclLookupSimpleVar(
 	    }
 	}
     } else {			/* Local var: look in frame varFramePtr. */
-	int localLen, localCt = varFramePtr->numCompiledLocals;
-	Tcl_Obj **objPtrPtr = &varFramePtr->localCachePtr->varName0;
-	const char *localNameStr;
+	int localCt = varFramePtr->numCompiledLocals;
+
+	if (localCt > 0) {
+	    Tcl_Obj **objPtrPtr = &varFramePtr->localCachePtr->varName0;
+	    const char *localNameStr;
+	    int localLen;
 
-	for (i=0 ; i<localCt ; i++, objPtrPtr++) {
-	    register Tcl_Obj *objPtr = *objPtrPtr;
+	    for (i=0 ; i<localCt ; i++, objPtrPtr++) {
+		register Tcl_Obj *objPtr = *objPtrPtr;
 
-	    if (objPtr) {
-		localNameStr = TclGetStringFromObj(objPtr, &localLen);
+		if (objPtr) {
+		    localNameStr = TclGetStringFromObj(objPtr, &localLen);
 
-		if ((varLen == localLen) && (varName[0] == localNameStr[0])
+		    if ((varLen == localLen) && (varName[0] == localNameStr[0])
 			&& !memcmp(varName, localNameStr, varLen)) {
-		    *indexPtr = i;
-		    return (Var *) &varFramePtr->compiledLocals[i];
+			*indexPtr = i;
+			return (Var *) &varFramePtr->compiledLocals[i];
+		    }
 		}
 	    }
 	}
@@ -1015,8 +1040,6 @@ TclLookupArrayElement(
 {
     int isNew;
     Var *varPtr;
-    TclVarHashTable *tablePtr;
-    Namespace *nsPtr;
 
     /*
      * We're dealing with an array element. Make sure the variable is an array
@@ -1049,16 +1072,7 @@ TclLookupArrayElement(
 	    return NULL;
 	}
 
-	TclSetVarArray(arrayPtr);
-	tablePtr = ckalloc(sizeof(TclVarHashTable));
-	arrayPtr->value.tablePtr = tablePtr;
-
-	if (TclIsVarInHash(arrayPtr) && TclGetVarNsPtr(arrayPtr)) {
-	    nsPtr = TclGetVarNsPtr(arrayPtr);
-	} else {
-	    nsPtr = NULL;
-	}
-	TclInitVarHashTable(arrayPtr->value.tablePtr, nsPtr);
+	TclInitArrayVar(arrayPtr);
     } else if (!TclIsVarArray(arrayPtr)) {
 	if (flags & TCL_LEAVE_ERR_MSG) {
 	    TclObjVarErrMsg(interp, arrayNamePtr, elNamePtr, msg, needArray,
@@ -1408,6 +1422,28 @@ TclPtrGetVarIdx(
 	return varPtr->value.objPtr;
     }
 
+    /*
+     * Return the array default value if any.
+     */
+
+    if (arrayPtr && TclIsVarArray(arrayPtr) && TclGetArrayDefault(arrayPtr)) {
+	return TclGetArrayDefault(arrayPtr);
+    }
+    if (TclIsVarArrayElement(varPtr) && !arrayPtr) {
+	/*
+	 * UGLY! Peek inside the implementation of things. This lets us get
+	 * the default of an array even when we've been [upvar]ed to just an
+	 * element of the array.
+	 */
+
+	ArrayVarHashTable *avhtPtr = (ArrayVarHashTable *)
+		((VarInHash *) varPtr)->entry.tablePtr;
+
+	if (avhtPtr->defaultObj) {
+	    return avhtPtr->defaultObj;
+	}
+    }
+
     if (flags & TCL_LEAVE_ERR_MSG) {
 	if (TclIsVarUndefined(varPtr) && arrayPtr
 		&& !TclIsVarUndefined(arrayPtr)) {
@@ -1768,6 +1804,130 @@ TclPtrSetVar(
 /*
  *----------------------------------------------------------------------
  *
+ * ListAppendInVar, StringAppendInVar --
+ *
+ *	Support functions for TclPtrSetVarIdx that implement various types of
+ *	appending operations.
+ *
+ * Results:
+ *	ListAppendInVar returns a Tcl result code (from the core list append
+ *	operation). StringAppendInVar has no return value.
+ *
+ * Side effects:
+ *	The variable or element of the array is updated. This may make the
+ *	variable/element exist. Reference counts of values may be updated.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline int
+ListAppendInVar(
+    Tcl_Interp *interp,
+    Var *varPtr,
+    Var *arrayPtr,
+    Tcl_Obj *oldValuePtr,
+    Tcl_Obj *newValuePtr)
+{
+    if (oldValuePtr == NULL) {
+	/*
+	 * No previous value. Check for defaults if there's an array we can
+	 * ask this of.
+	 */
+
+	if (arrayPtr) {
+	    Tcl_Obj *defValuePtr = TclGetArrayDefault(arrayPtr);
+
+	    if (defValuePtr) {
+		oldValuePtr = Tcl_DuplicateObj(defValuePtr);
+	    }
+	}
+
+	if (oldValuePtr == NULL) {
+	    /*
+	     * No default. [lappend] semantics say this is like being an empty
+	     * string.
+	     */
+
+	    TclNewObj(oldValuePtr);
+	}
+	varPtr->value.objPtr = oldValuePtr;
+	Tcl_IncrRefCount(oldValuePtr);	/* Since var is referenced. */
+    } else if (Tcl_IsShared(oldValuePtr)) {
+	varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr);
+	TclDecrRefCount(oldValuePtr);
+	oldValuePtr = varPtr->value.objPtr;
+	Tcl_IncrRefCount(oldValuePtr);	/* Since var is referenced. */
+    }
+
+    return Tcl_ListObjAppendElement(interp, oldValuePtr, newValuePtr);
+}
+
+static inline void
+StringAppendInVar(
+    Var *varPtr,
+    Var *arrayPtr,
+    Tcl_Obj *oldValuePtr,
+    Tcl_Obj *newValuePtr)
+{
+    /*
+     * If there was no previous value, either we use the array's default (if
+     * this is an array with a default at all) or we treat this as a simple
+     * set.
+     */
+
+    if (oldValuePtr == NULL) {
+	if (arrayPtr) {
+	    Tcl_Obj *defValuePtr = TclGetArrayDefault(arrayPtr);
+
+	    if (defValuePtr) {
+		/*
+		 * This is *almost* the same as the shared path below, except
+		 * that the original value reference in defValuePtr is not
+		 * decremented.
+		 */
+
+		Tcl_Obj *valuePtr = Tcl_DuplicateObj(defValuePtr);
+
+		varPtr->value.objPtr = valuePtr;
+		TclContinuationsCopy(valuePtr, defValuePtr);
+		Tcl_IncrRefCount(valuePtr);
+		Tcl_AppendObjToObj(valuePtr, newValuePtr);
+		if (newValuePtr->refCount == 0) {
+		    Tcl_DecrRefCount(newValuePtr);
+		}
+		return;
+	    }
+	}
+	varPtr->value.objPtr = newValuePtr;
+	Tcl_IncrRefCount(newValuePtr);
+	return;
+    }
+
+    /*
+     * We append newValuePtr's bytes but don't change its ref count. Unless
+     * the reference is shared, when we have to duplicate in order to be safe
+     * to modify at all.
+     */
+
+    if (Tcl_IsShared(oldValuePtr)) {	/* Append to copy. */
+	varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr);
+
+	TclContinuationsCopy(varPtr->value.objPtr, oldValuePtr);
+
+	TclDecrRefCount(oldValuePtr);
+	oldValuePtr = varPtr->value.objPtr;
+	Tcl_IncrRefCount(oldValuePtr);	/* Since var is ref */
+    }
+
+    Tcl_AppendObjToObj(oldValuePtr, newValuePtr);
+    if (newValuePtr->refCount == 0) {
+	Tcl_DecrRefCount(newValuePtr);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * TclPtrSetVarIdx --
  *
  *	This function is the same as Tcl_SetVar2Ex above, except that it
@@ -1880,44 +2040,13 @@ TclPtrSetVarIdx(
     }
     if (flags & (TCL_APPEND_VALUE|TCL_LIST_ELEMENT)) {
 	if (flags & TCL_LIST_ELEMENT) {		/* Append list element. */
-	    if (oldValuePtr == NULL) {
-		TclNewObj(oldValuePtr);
-		varPtr->value.objPtr = oldValuePtr;
-		Tcl_IncrRefCount(oldValuePtr);	/* Since var is referenced. */
-	    } else if (Tcl_IsShared(oldValuePtr)) {
-		varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr);
-		TclDecrRefCount(oldValuePtr);
-		oldValuePtr = varPtr->value.objPtr;
-		Tcl_IncrRefCount(oldValuePtr);	/* Since var is referenced. */
-	    }
-	    result = Tcl_ListObjAppendElement(interp, oldValuePtr,
+	    result = ListAppendInVar(interp, varPtr, arrayPtr, oldValuePtr,
 		    newValuePtr);
 	    if (result != TCL_OK) {
 		goto earlyError;
 	    }
 	} else {				/* Append string. */
-	    /*
-	     * We append newValuePtr's bytes but don't change its ref count.
-	     */
-
-	    if (oldValuePtr == NULL) {
-		varPtr->value.objPtr = newValuePtr;
-		Tcl_IncrRefCount(newValuePtr);
-	    } else {
-		if (Tcl_IsShared(oldValuePtr)) {	/* Append to copy. */
-		    varPtr->value.objPtr = Tcl_DuplicateObj(oldValuePtr);
-
-		    TclContinuationsCopy(varPtr->value.objPtr, oldValuePtr);
-
-		    TclDecrRefCount(oldValuePtr);
-		    oldValuePtr = varPtr->value.objPtr;
-		    Tcl_IncrRefCount(oldValuePtr);	/* Since var is ref */
-		}
-		Tcl_AppendObjToObj(oldValuePtr, newValuePtr);
-		if (newValuePtr->refCount == 0) {
-		    Tcl_DecrRefCount(newValuePtr);
-		}
-	    }
+	    StringAppendInVar(varPtr, arrayPtr, oldValuePtr, newValuePtr);
 	}
     } else if (newValuePtr != oldValuePtr) {
 	/*
@@ -4074,9 +4203,7 @@ ArraySetCmd(
 	    return TCL_ERROR;
 	}
     }
-    TclSetVarArray(varPtr);
-    varPtr->value.tablePtr = ckalloc(sizeof(TclVarHashTable));
-    TclInitVarHashTable(varPtr->value.tablePtr, TclGetVarNsPtr(varPtr));
+    TclInitArrayVar(varPtr);
     return TCL_OK;
 }
 
@@ -4356,6 +4483,7 @@ TclInitArrayCmd(
 {
     static const EnsembleImplMap arrayImplMap[] = {
 	{"anymore",	ArrayAnyMoreCmd,	TclCompileBasic2ArgCmd, NULL, NULL, 0},
+	{"default",	ArrayDefaultCmd,	TclCompileBasic2Or3ArgCmd, NULL, NULL, 0},
 	{"donesearch",	ArrayDoneSearchCmd,	TclCompileBasic2ArgCmd, NULL, NULL, 0},
 	{"exists",	ArrayExistsCmd,		TclCompileArrayExistsCmd, NULL, NULL, 0},
 	{"for",		ArrayForObjCmd,		TclCompileBasic3ArgCmd, ArrayForNRCmd, NULL, 0},
@@ -5546,8 +5674,7 @@ DeleteArray(
 
 	TclClearVarNamespaceVar(elPtr);
     }
-    VarHashDeleteTable(varPtr->value.tablePtr);
-    ckfree(varPtr->value.tablePtr);
+    DeleteArrayVar(varPtr);
 }
 
 /*
@@ -6236,7 +6363,7 @@ AppendLocals(
     Interp *iPtr = (Interp *) interp;
     Var *varPtr;
     int i, localVarCt, added;
-    Tcl_Obj **varNamePtr, *objNamePtr;
+    Tcl_Obj *objNamePtr;
     const char *varName;
     TclVarHashTable *localVarTablePtr;
     Tcl_HashSearch search;
@@ -6246,27 +6373,30 @@ AppendLocals(
     localVarCt = iPtr->varFramePtr->numCompiledLocals;
     varPtr = iPtr->varFramePtr->compiledLocals;
     localVarTablePtr = iPtr->varFramePtr->varTablePtr;
-    varNamePtr = &iPtr->varFramePtr->localCachePtr->varName0;
     if (includeLinks) {
 	Tcl_InitObjHashTable(&addedTable);
     }
 
-    for (i = 0; i < localVarCt; i++, varNamePtr++) {
-	/*
-	 * Skip nameless (temporary) variables and undefined variables.
-	 */
+    if (localVarCt > 0) {
+	Tcl_Obj **varNamePtr = &iPtr->varFramePtr->localCachePtr->varName0;
+
+	for (i = 0; i < localVarCt; i++, varNamePtr++) {
+	    /*
+	     * Skip nameless (temporary) variables and undefined variables.
+	     */
 
-	if (*varNamePtr && !TclIsVarUndefined(varPtr)
+	    if (*varNamePtr && !TclIsVarUndefined(varPtr)
 		&& (includeLinks || !TclIsVarLink(varPtr))) {
-	    varName = TclGetString(*varNamePtr);
-	    if ((pattern == NULL) || Tcl_StringMatch(varName, pattern)) {
-		Tcl_ListObjAppendElement(interp, listPtr, *varNamePtr);
-		if (includeLinks) {
-		    Tcl_CreateHashEntry(&addedTable, *varNamePtr, &added);
+		varName = TclGetString(*varNamePtr);
+		if ((pattern == NULL) || Tcl_StringMatch(varName, pattern)) {
+		    Tcl_ListObjAppendElement(interp, listPtr, *varNamePtr);
+		    if (includeLinks) {
+			Tcl_CreateHashEntry(&addedTable, *varNamePtr, &added);
+		    }
 		}
 	    }
+	    varPtr++;
 	}
-	varPtr++;
     }
 
     /*
@@ -6460,6 +6590,264 @@ CompareVarKeys(
     return ((l1 == l2) && !memcmp(p1, p2, l1));
 }
 
+/*----------------------------------------------------------------------
+ *
+ * ArrayDefaultCmd --
+ *
+ *	This function implements the 'array default' Tcl command.
+ *	Refer to the user documentation for details on what it does.
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ * Side effects:
+ *	See the user documentation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+	/* ARGSUSED */
+static int
+ArrayDefaultCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    static const char *const options[] = {
+	"get", "set", "exists", "unset", NULL
+    };
+    enum options { OPT_GET, OPT_SET, OPT_EXISTS, OPT_UNSET };
+    Tcl_Obj *arrayNameObj, *defaultValueObj;
+    Var *varPtr, *arrayPtr;
+    int isArray, option;
+
+    /*
+     * Parse arguments.
+     */
+
+    if (objc != 3 && objc != 4) {
+	Tcl_WrongNumArgs(interp, 1, objv, "option arrayName ?value?");
+	return TCL_ERROR;
+    }
+    if (Tcl_GetIndexFromObj(interp, objv[1], options, "option",
+	    0, &option) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    arrayNameObj = objv[2];
+
+    if (TCL_ERROR == LocateArray(interp, arrayNameObj, &varPtr, &isArray)) {
+	return TCL_ERROR;
+    }
+
+    switch (option) {
+    case OPT_GET:
+	if (objc != 3) {
+	    Tcl_WrongNumArgs(interp, 2, objv, "arrayName");
+	    return TCL_ERROR;
+	}
+	if (!varPtr || TclIsVarUndefined(varPtr) || !isArray) {
+	    return NotArrayError(interp, arrayNameObj);
+	}
+
+	defaultValueObj = TclGetArrayDefault(varPtr);
+	if (!defaultValueObj) {
+	    /* Array default must exist. */
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		    "array has no default value", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "READ", "ARRAY", "DEFAULT", NULL);
+	    return TCL_ERROR;
+	}
+	Tcl_SetObjResult(interp, defaultValueObj);
+	return TCL_OK;
+
+    case OPT_SET:
+	if (objc != 4) {
+	    Tcl_WrongNumArgs(interp, 2, objv, "arrayName value");
+	    return TCL_ERROR;
+	}
+
+	/*
+	 * Attempt to create array if needed.
+	 */
+	varPtr = TclObjLookupVarEx(interp, arrayNameObj, NULL,
+		/*flags*/ TCL_LEAVE_ERR_MSG, /*msg*/ "array default set",
+		/*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr);
+	if (varPtr == NULL) {
+	    return TCL_ERROR;
+	}
+	if (arrayPtr) {
+	    /*
+	     * Not a valid array name.
+	     */
+
+	    CleanupVar(varPtr, arrayPtr);
+	    TclObjVarErrMsg(interp, arrayNameObj, NULL, "array default set",
+		    needArray, -1);
+	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "VARNAME",
+		    TclGetString(arrayNameObj), NULL);
+	    return TCL_ERROR;
+	}
+	if (!TclIsVarArray(varPtr) && !TclIsVarUndefined(varPtr)) {
+	    /*
+	     * Not an array.
+	     */
+
+	    TclObjVarErrMsg(interp, arrayNameObj, NULL, "array default set",
+		    needArray, -1);
+	    Tcl_SetErrorCode(interp, "TCL", "WRITE", "ARRAY", NULL);
+	    return TCL_ERROR;
+	}
+
+	if (!TclIsVarArray(varPtr)) {
+	    TclInitArrayVar(varPtr);
+	}
+	defaultValueObj = objv[3];
+	SetArrayDefault(varPtr, defaultValueObj);
+	return TCL_OK;
+
+    case OPT_EXISTS:
+	if (objc != 3) {
+	    Tcl_WrongNumArgs(interp, 2, objv, "arrayName");
+	    return TCL_ERROR;
+	}
+
+	/*
+	 * Undefined variables (whether or not they have storage allocated) do
+	 * not have defaults, and this is not an error case.
+	 */
+
+	if (!varPtr || TclIsVarUndefined(varPtr)) {
+	    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(0));
+	} else if (!isArray) {
+	    return NotArrayError(interp, arrayNameObj);
+	} else {
+	    defaultValueObj = TclGetArrayDefault(varPtr);
+	    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(!!defaultValueObj));
+	}
+	return TCL_OK;
+
+    case OPT_UNSET:
+	if (objc != 3) {
+	    Tcl_WrongNumArgs(interp, 2, objv, "arrayName");
+	    return TCL_ERROR;
+	}
+
+	if (varPtr && !TclIsVarUndefined(varPtr)) {
+	    if (!isArray) {
+		return NotArrayError(interp, arrayNameObj);
+	    }
+	    SetArrayDefault(varPtr, NULL);
+	}
+	return TCL_OK;
+    }
+
+    /* Unreached */
+    return TCL_ERROR;
+}
+
+/*
+ * Initialize array variable.
+ */
+
+void
+TclInitArrayVar(
+    Var *arrayPtr)
+{
+    ArrayVarHashTable *tablePtr = ckalloc(sizeof(ArrayVarHashTable));
+
+    /*
+     * Mark the variable as an array.
+     */
+
+    TclSetVarArray(arrayPtr);
+
+    /*
+     * Regular TclVarHashTable initialization.
+     */
+
+    arrayPtr->value.tablePtr = (TclVarHashTable *) tablePtr;
+    TclInitVarHashTable(arrayPtr->value.tablePtr, TclGetVarNsPtr(arrayPtr));
+
+    /*
+     * Default value initialization.
+     */
+
+    tablePtr->defaultObj = NULL;
+}
+
+/*
+ * Cleanup array variable.
+ */
+
+static void
+DeleteArrayVar(
+    Var *arrayPtr)
+{
+    ArrayVarHashTable *tablePtr = (ArrayVarHashTable *)
+	    arrayPtr->value.tablePtr;
+
+    /*
+     * Default value cleanup.
+     */
+
+    SetArrayDefault(arrayPtr, NULL);
+
+    /*
+     * Regular TclVarHashTable cleanup.
+     */
+
+    VarHashDeleteTable(arrayPtr->value.tablePtr);
+    ckfree(tablePtr);
+}
+
+/*
+ * Get array default value if any.
+ */
+
+Tcl_Obj *
+TclGetArrayDefault(
+    Var *arrayPtr)
+{
+    ArrayVarHashTable *tablePtr = (ArrayVarHashTable *)
+	    arrayPtr->value.tablePtr;
+
+    return tablePtr->defaultObj;
+}
+
+/*
+ * Set/replace/unset array default value.
+ */
+
+static void
+SetArrayDefault(
+    Var *arrayPtr,
+    Tcl_Obj *defaultObj)
+{
+    ArrayVarHashTable *tablePtr = (ArrayVarHashTable *)
+	    arrayPtr->value.tablePtr;
+
+    /*
+     * Increment/decrement refcount twice to ensure that the object is shared,
+     * so that it doesn't get modified accidentally by the folling code:
+     *
+     *      array default set v 1
+     *      lappend v(a) 2; # returns a new object {1 2}
+     *      set v(b); # returns the original default object "1"
+     */
+
+    if (tablePtr->defaultObj) {
+        Tcl_DecrRefCount(tablePtr->defaultObj);
+        Tcl_DecrRefCount(tablePtr->defaultObj);
+    }
+    tablePtr->defaultObj = defaultObj;
+    if (tablePtr->defaultObj) {
+        Tcl_IncrRefCount(tablePtr->defaultObj);
+        Tcl_IncrRefCount(tablePtr->defaultObj);
+    }
+}
+
 /*
  * Local Variables:
  * mode: c
diff --git a/generic/tclZipfs.c b/generic/tclZipfs.c
new file mode 100644
index 0000000..428be15
--- /dev/null
+++ b/generic/tclZipfs.c
@@ -0,0 +1,5011 @@
+/*
+ * tclZipfs.c --
+ *
+ *	Implementation of the ZIP filesystem used in TIP 430
+ *	Adapted from the implentation for AndroWish.
+ *
+ * Copyright (c) 2016-2017 Sean Woods <yoda@etoyoc.com>
+ * Copyright (c) 2013-2015 Christian Werner <chw@ch-werner.de>
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * This file is distributed in two ways:
+ *   generic/tclZipfs.c file in the TIP430-enabled Tcl cores.
+ *   compat/tclZipfs.c file in the tclconfig (TEA) file system, for pre-tip430
+ *	projects.
+ */
+
+#include "tclInt.h"
+#include "tclFileSystem.h"
+
+#ifndef _WIN32
+#include <sys/mman.h>
+#endif /* _WIN32*/
+
+#ifndef MAP_FILE
+#define MAP_FILE 0
+#endif /* !MAP_FILE */
+
+#ifdef HAVE_ZLIB
+#include "zlib.h"
+#include "crypt.h"
+
+#ifdef CFG_RUNTIME_DLLFILE
+
+/*
+** We are compiling as part of the core.
+** TIP430 style zipfs prefix
+*/
+
+#define ZIPFS_VOLUME	  "//zipfs:/"
+#define ZIPFS_VOLUME_LEN  9
+#define ZIPFS_APP_MOUNT	  "//zipfs:/app"
+#define ZIPFS_ZIP_MOUNT	  "//zipfs:/lib/tcl"
+
+#else /* !CFG_RUNTIME_DLLFILE */
+
+/*
+** We are compiling from the /compat folder of tclconfig
+** Pre TIP430 style zipfs prefix
+** //zipfs:/ doesn't work straight out of the box on either windows or Unix
+** without other changes made to tip 430
+*/
+
+#define ZIPFS_VOLUME	  "zipfs:/"
+#define ZIPFS_VOLUME_LEN  7
+#define ZIPFS_APP_MOUNT	  "zipfs:/app"
+#define ZIPFS_ZIP_MOUNT	  "zipfs:/lib/tcl"
+
+#endif /* CFG_RUNTIME_DLLFILE */
+
+/*
+ * Various constants and offsets found in ZIP archive files
+ */
+
+#define ZIP_SIG_LEN			4
+
+/*
+ * Local header of ZIP archive member (at very beginning of each member).
+ */
+
+#define ZIP_LOCAL_HEADER_SIG		0x04034b50
+#define ZIP_LOCAL_HEADER_LEN		30
+#define ZIP_LOCAL_SIG_OFFS		0
+#define ZIP_LOCAL_VERSION_OFFS		4
+#define ZIP_LOCAL_FLAGS_OFFS		6
+#define ZIP_LOCAL_COMPMETH_OFFS		8
+#define ZIP_LOCAL_MTIME_OFFS		10
+#define ZIP_LOCAL_MDATE_OFFS		12
+#define ZIP_LOCAL_CRC32_OFFS		14
+#define ZIP_LOCAL_COMPLEN_OFFS		18
+#define ZIP_LOCAL_UNCOMPLEN_OFFS	22
+#define ZIP_LOCAL_PATHLEN_OFFS		26
+#define ZIP_LOCAL_EXTRALEN_OFFS		28
+
+/*
+ * Central header of ZIP archive member at end of ZIP file.
+ */
+
+#define ZIP_CENTRAL_HEADER_SIG		0x02014b50
+#define ZIP_CENTRAL_HEADER_LEN		46
+#define ZIP_CENTRAL_SIG_OFFS		0
+#define ZIP_CENTRAL_VERSIONMADE_OFFS	4
+#define ZIP_CENTRAL_VERSION_OFFS	6
+#define ZIP_CENTRAL_FLAGS_OFFS		8
+#define ZIP_CENTRAL_COMPMETH_OFFS	10
+#define ZIP_CENTRAL_MTIME_OFFS		12
+#define ZIP_CENTRAL_MDATE_OFFS		14
+#define ZIP_CENTRAL_CRC32_OFFS		16
+#define ZIP_CENTRAL_COMPLEN_OFFS	20
+#define ZIP_CENTRAL_UNCOMPLEN_OFFS	24
+#define ZIP_CENTRAL_PATHLEN_OFFS	28
+#define ZIP_CENTRAL_EXTRALEN_OFFS	30
+#define ZIP_CENTRAL_FCOMMENTLEN_OFFS	32
+#define ZIP_CENTRAL_DISKFILE_OFFS	34
+#define ZIP_CENTRAL_IATTR_OFFS		36
+#define ZIP_CENTRAL_EATTR_OFFS		38
+#define ZIP_CENTRAL_LOCALHDR_OFFS	42
+
+/*
+ * Central end signature at very end of ZIP file.
+ */
+
+#define ZIP_CENTRAL_END_SIG		0x06054b50
+#define ZIP_CENTRAL_END_LEN		22
+#define ZIP_CENTRAL_END_SIG_OFFS	0
+#define ZIP_CENTRAL_DISKNO_OFFS		4
+#define ZIP_CENTRAL_DISKDIR_OFFS	6
+#define ZIP_CENTRAL_ENTS_OFFS		8
+#define ZIP_CENTRAL_TOTALENTS_OFFS	10
+#define ZIP_CENTRAL_DIRSIZE_OFFS	12
+#define ZIP_CENTRAL_DIRSTART_OFFS	16
+#define ZIP_CENTRAL_COMMENTLEN_OFFS	20
+
+#define ZIP_MIN_VERSION			20
+#define ZIP_COMPMETH_STORED		0
+#define ZIP_COMPMETH_DEFLATED		8
+
+#define ZIP_PASSWORD_END_SIG		0x5a5a4b50
+
+#define DEFAULT_WRITE_MAX_SIZE		(2 * 1024 * 1024)
+
+/*
+ * Macros to report errors only if an interp is present.
+ */
+
+#define ZIPFS_ERROR(interp,errstr) \
+    do {								\
+	if (interp) {							\
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(errstr, -1));	\
+	}								\
+    } while (0)
+#define ZIPFS_POSIX_ERROR(interp,errstr) \
+    do {								\
+	if (interp) {							\
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(			\
+		    "%s: %s", errstr, Tcl_PosixError(interp)));		\
+	}								\
+    } while (0)
+
+/*
+ * Macros to read and write 16 and 32 bit integers from/to ZIP archives.
+ */
+
+#define ZipReadInt(p) \
+    ((p)[0] | ((p)[1] << 8) | ((p)[2] << 16) | ((p)[3] << 24))
+#define ZipReadShort(p) \
+    ((p)[0] | ((p)[1] << 8))
+
+#define ZipWriteInt(p, v) \
+    do {			     \
+	(p)[0] = (v) & 0xff;	     \
+	(p)[1] = ((v) >> 8) & 0xff;  \
+	(p)[2] = ((v) >> 16) & 0xff; \
+	(p)[3] = ((v) >> 24) & 0xff; \
+    } while (0)
+#define ZipWriteShort(p, v) \
+    do {			    \
+	(p)[0] = (v) & 0xff;	    \
+	(p)[1] = ((v) >> 8) & 0xff; \
+    } while (0)
+
+/*
+ * Windows drive letters.
+ */
+
+#ifdef _WIN32
+static const char drvletters[] =
+    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+#endif /* _WIN32 */
+
+/*
+ * Mutex to protect localtime(3) when no reentrant version available.
+ */
+
+#if !defined(_WIN32) && !defined(HAVE_LOCALTIME_R) && TCL_THREADS
+TCL_DECLARE_MUTEX(localtimeMutex)
+#endif /* !_WIN32 && !HAVE_LOCALTIME_R && TCL_THREADS */
+
+/*
+ * In-core description of mounted ZIP archive file.
+ */
+
+typedef struct ZipFile {
+    char *name;			/* Archive name */
+    size_t nameLength;		/* Length of archive name */
+    char isMemBuffer;		/* When true, not a file but a memory buffer */
+    Tcl_Channel chan;		/* Channel handle or NULL */
+    unsigned char *data;	/* Memory mapped or malloc'ed file */
+    size_t length;		/* Length of memory mapped file */
+    void *ptrToFree;		/* Non-NULL if malloc'ed file */
+    size_t numFiles;		/* Number of files in archive */
+    size_t baseOffset;		/* Archive start */
+    size_t passOffset;		/* Password start */
+    size_t directoryOffset;	/* Archive directory start */
+    unsigned char passBuf[264];	/* Password buffer */
+    size_t numOpen;		/* Number of open files on archive */
+    struct ZipEntry *entries;	/* List of files in archive */
+    struct ZipEntry *topEnts;	/* List of top-level dirs in archive */
+    char *mountPoint;		/* Mount point name */
+    size_t mountPointLen;	/* Length of mount point name */
+#ifdef _WIN32
+    HANDLE mountHandle;		/* Handle used for direct file access. */
+#endif /* _WIN32 */
+} ZipFile;
+
+/*
+ * In-core description of file contained in mounted ZIP archive.
+ */
+
+typedef struct ZipEntry {
+    char *name;			/* The full pathname of the virtual file */
+    ZipFile *zipFilePtr;	/* The ZIP file holding this virtual file */
+    Tcl_WideInt offset;		/* Data offset into memory mapped ZIP file */
+    int numBytes;		/* Uncompressed size of the virtual file */
+    int numCompressedBytes;	/* Compressed size of the virtual file */
+    int compressMethod;		/* Compress method */
+    int isDirectory;		/* Set to 1 if directory, or -1 if root */
+    int depth;			/* Number of slashes in path. */
+    int crc32;			/* CRC-32 */
+    int timestamp;		/* Modification time */
+    int isEncrypted;		/* True if data is encrypted */
+    unsigned char *data;	/* File data if written */
+    struct ZipEntry *next;	/* Next file in the same archive */
+    struct ZipEntry *tnext;	/* Next top-level dir in archive */
+} ZipEntry;
+
+/*
+ * File channel for file contained in mounted ZIP archive.
+ */
+
+typedef struct ZipChannel {
+    ZipFile *zipFilePtr;	/* The ZIP file holding this channel */
+    ZipEntry *zipEntryPtr;	/* Pointer back to virtual file */
+    size_t maxWrite;		/* Maximum size for write */
+    size_t numBytes;		/* Number of bytes of uncompressed data */
+    size_t numRead;		/* Position of next byte to be read from the
+				 * channel */
+    unsigned char *ubuf;	/* Pointer to the uncompressed data */
+    int iscompr;		/* True if data is compressed */
+    int isDirectory;		/* Set to 1 if directory, or -1 if root */
+    int isEncrypted;		/* True if data is encrypted */
+    int isWriting;		/* True if open for writing */
+    unsigned long keys[3];	/* Key for decryption */
+} ZipChannel;
+
+/*
+ * Global variables.
+ *
+ * Most are kept in single ZipFS struct. When build with threading support
+ * this struct is protected by the ZipFSMutex (see below).
+ *
+ * The "fileHash" component is the process wide global table of all known ZIP
+ * archive members in all mounted ZIP archives.
+ *
+ * The "zipHash" components is the process wide global table of all mounted
+ * ZIP archive files.
+ */
+
+static struct {
+    int initialized;		/* True when initialized */
+    int lock;			/* RW lock, see below */
+    int waiters;		/* RW lock, see below */
+    int wrmax;			/* Maximum write size of a file */
+    int idCount;		/* Counter for channel names */
+    Tcl_HashTable fileHash;	/* File name to ZipEntry mapping */
+    Tcl_HashTable zipHash;	/* Mount to ZipFile mapping */
+} ZipFS = {
+    0, 0, 0, DEFAULT_WRITE_MAX_SIZE, 0,
+};
+
+/*
+ * For password rotation.
+ */
+
+static const char pwrot[16] = {
+    0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
+    0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0
+};
+
+/*
+ * Table to compute CRC32.
+ */
+
+static const z_crc_t crc32tab[256] = {
+    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
+    0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
+    0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
+    0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+    0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
+    0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+    0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
+    0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
+    0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
+    0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
+    0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
+    0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
+    0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
+    0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
+    0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+    0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
+    0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+    0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
+    0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
+    0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
+    0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
+    0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
+    0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
+    0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+    0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
+    0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+    0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
+    0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
+    0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
+    0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
+    0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
+    0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
+    0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
+    0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
+    0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+    0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
+    0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+    0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
+    0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
+    0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
+    0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
+    0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
+    0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
+    0x2d02ef8d,
+};
+
+static const char *zipfs_literal_tcl_library = NULL;
+
+/* Function prototypes */
+
+static inline int	DescribeMounted(Tcl_Interp *interp,
+			    const char *mountPoint);
+static inline int	ListMountPoints(Tcl_Interp *interp);
+static int		ZipfsAppHookFindTclInit(const char *archive);
+static int		ZipFSPathInFilesystemProc(Tcl_Obj *pathPtr,
+			    ClientData *clientDataPtr);
+static Tcl_Obj *	ZipFSFilesystemPathTypeProc(Tcl_Obj *pathPtr);
+static Tcl_Obj *	ZipFSFilesystemSeparatorProc(Tcl_Obj *pathPtr);
+static int		ZipFSStatProc(Tcl_Obj *pathPtr, Tcl_StatBuf *buf);
+static int		ZipFSAccessProc(Tcl_Obj *pathPtr, int mode);
+static Tcl_Channel	ZipFSOpenFileChannelProc(Tcl_Interp *interp,
+			    Tcl_Obj *pathPtr, int mode, int permissions);
+static int		ZipFSMatchInDirectoryProc(Tcl_Interp *interp,
+			    Tcl_Obj *result, Tcl_Obj *pathPtr,
+			    const char *pattern, Tcl_GlobTypeData *types);
+static Tcl_Obj *	ZipFSListVolumesProc(void);
+static const char *const *ZipFSFileAttrStringsProc(Tcl_Obj *pathPtr,
+			    Tcl_Obj **objPtrRef);
+static int		ZipFSFileAttrsGetProc(Tcl_Interp *interp, int index,
+			    Tcl_Obj *pathPtr, Tcl_Obj **objPtrRef);
+static int		ZipFSFileAttrsSetProc(Tcl_Interp *interp, int index,
+			    Tcl_Obj *pathPtr, Tcl_Obj *objPtr);
+static int		ZipFSLoadFile(Tcl_Interp *interp, Tcl_Obj *path,
+			    Tcl_LoadHandle *loadHandle,
+			    Tcl_FSUnloadFileProc **unloadProcPtr, int flags);
+static void		ZipfsSetup(void);
+static int		ZipChannelClose(ClientData instanceData,
+			    Tcl_Interp *interp);
+static int		ZipChannelGetFile(ClientData instanceData,
+			    int direction, ClientData *handlePtr);
+static int		ZipChannelRead(ClientData instanceData, char *buf,
+			    int toRead, int *errloc);
+static int		ZipChannelSeek(ClientData instanceData, long offset,
+			    int mode, int *errloc);
+static void		ZipChannelWatchChannel(ClientData instanceData,
+			    int mask);
+static int		ZipChannelWrite(ClientData instanceData,
+			    const char *buf, int toWrite, int *errloc);
+
+/*
+ * Define the ZIP filesystem dispatch table.
+ */
+
+MODULE_SCOPE const Tcl_Filesystem zipfsFilesystem;
+
+const Tcl_Filesystem zipfsFilesystem = {
+    "zipfs",
+    sizeof(Tcl_Filesystem),
+    TCL_FILESYSTEM_VERSION_2,
+    ZipFSPathInFilesystemProc,
+    NULL, /* dupInternalRepProc */
+    NULL, /* freeInternalRepProc */
+    NULL, /* internalToNormalizedProc */
+    NULL, /* createInternalRepProc */
+    NULL, /* normalizePathProc */
+    ZipFSFilesystemPathTypeProc,
+    ZipFSFilesystemSeparatorProc,
+    ZipFSStatProc,
+    ZipFSAccessProc,
+    ZipFSOpenFileChannelProc,
+    ZipFSMatchInDirectoryProc,
+    NULL, /* utimeProc */
+    NULL, /* linkProc */
+    ZipFSListVolumesProc,
+    ZipFSFileAttrStringsProc,
+    ZipFSFileAttrsGetProc,
+    ZipFSFileAttrsSetProc,
+    NULL, /* createDirectoryProc */
+    NULL, /* removeDirectoryProc */
+    NULL, /* deleteFileProc */
+    NULL, /* copyFileProc */
+    NULL, /* renameFileProc */
+    NULL, /* copyDirectoryProc */
+    NULL, /* lstatProc */
+    (Tcl_FSLoadFileProc *) ZipFSLoadFile,
+    NULL, /* getCwdProc */
+    NULL, /* chdirProc */
+};
+
+/*
+ * The channel type/driver definition used for ZIP archive members.
+ */
+
+static Tcl_ChannelType ZipChannelType = {
+    "zip",		    /* Type name. */
+    TCL_CHANNEL_VERSION_5,
+    ZipChannelClose,	    /* Close channel, clean instance data */
+    ZipChannelRead,	    /* Handle read request */
+    ZipChannelWrite,	    /* Handle write request */
+    ZipChannelSeek,	    /* Move location of access point, NULL'able */
+    NULL,		    /* Set options, NULL'able */
+    NULL,		    /* Get options, NULL'able */
+    ZipChannelWatchChannel, /* Initialize notifier */
+    ZipChannelGetFile,	    /* Get OS handle from the channel */
+    NULL,		    /* 2nd version of close channel, NULL'able */
+    NULL,		    /* Set blocking mode for raw channel, NULL'able */
+    NULL,		    /* Function to flush channel, NULL'able */
+    NULL,		    /* Function to handle event, NULL'able */
+    NULL,		    /* Wide seek function, NULL'able */
+    NULL,		    /* Thread action function, NULL'able */
+    NULL,		    /* Truncate function, NULL'able */
+};
+
+/*
+ * Miscellaneous constants.
+ */
+
+#define ERROR_LENGTH	((size_t) -1)
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ReadLock, WriteLock, Unlock --
+ *
+ *	POSIX like rwlock functions to support multiple readers and single
+ *	writer on internal structs.
+ *
+ *	Limitations:
+ *	 - a read lock cannot be promoted to a write lock
+ *	 - a write lock may not be nested
+ *
+ *-------------------------------------------------------------------------
+ */
+
+TCL_DECLARE_MUTEX(ZipFSMutex)
+
+#if TCL_THREADS
+
+static Tcl_Condition ZipFSCond;
+
+static void
+ReadLock(void)
+{
+    Tcl_MutexLock(&ZipFSMutex);
+    while (ZipFS.lock < 0) {
+	ZipFS.waiters++;
+	Tcl_ConditionWait(&ZipFSCond, &ZipFSMutex, NULL);
+	ZipFS.waiters--;
+    }
+    ZipFS.lock++;
+    Tcl_MutexUnlock(&ZipFSMutex);
+}
+
+static void
+WriteLock(void)
+{
+    Tcl_MutexLock(&ZipFSMutex);
+    while (ZipFS.lock != 0) {
+	ZipFS.waiters++;
+	Tcl_ConditionWait(&ZipFSCond, &ZipFSMutex, NULL);
+	ZipFS.waiters--;
+    }
+    ZipFS.lock = -1;
+    Tcl_MutexUnlock(&ZipFSMutex);
+}
+
+static void
+Unlock(void)
+{
+    Tcl_MutexLock(&ZipFSMutex);
+    if (ZipFS.lock > 0) {
+	--ZipFS.lock;
+    } else if (ZipFS.lock < 0) {
+	ZipFS.lock = 0;
+    }
+    if ((ZipFS.lock == 0) && (ZipFS.waiters > 0)) {
+	Tcl_ConditionNotify(&ZipFSCond);
+    }
+    Tcl_MutexUnlock(&ZipFSMutex);
+}
+
+#else /* !TCL_THREADS */
+#define ReadLock()	do {} while (0)
+#define WriteLock()	do {} while (0)
+#define Unlock()	do {} while (0)
+#endif /* TCL_THREADS */
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * DosTimeDate, ToDosTime, ToDosDate --
+ *
+ *	Functions to perform conversions between DOS time stamps and POSIX
+ *	time_t.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static time_t
+DosTimeDate(
+    int dosDate,
+    int dosTime)
+{
+    struct tm tm;
+    time_t ret;
+
+    memset(&tm, 0, sizeof(struct tm));
+    tm.tm_year = ((dosDate & 0xfe00) >> 9) + 80;
+    tm.tm_mon = ((dosDate & 0x1e0) >> 5) - 1;
+    tm.tm_mday = dosDate & 0x1f;
+    tm.tm_hour = (dosTime & 0xf800) >> 11;
+    tm.tm_min = (dosTime & 0x7e) >> 5;
+    tm.tm_sec = (dosTime & 0x1f) << 1;
+    ret = mktime(&tm);
+    if (ret == (time_t) -1) {
+	/* fallback to 1980-01-01T00:00:00+00:00 (DOS epoch) */
+	ret = (time_t) 315532800;
+    }
+    return ret;
+}
+
+static int
+ToDosTime(
+    time_t when)
+{
+    struct tm *tmp, tm;
+
+#if !TCL_THREADS || defined(_WIN32)
+    /* Not threaded, or on Win32 which uses thread local storage */
+    tmp = localtime(&when);
+    tm = *tmp;
+#elif defined(HAVE_LOCALTIME_R)
+    /* Threaded, have reentrant API */
+    tmp = &tm;
+    localtime_r(&when, tmp);
+#else /* TCL_THREADS && !_WIN32 && !HAVE_LOCALTIME_R */
+    /* Only using a mutex is safe. */
+    Tcl_MutexLock(&localtimeMutex);
+    tmp = localtime(&when);
+    tm = *tmp;
+    Tcl_MutexUnlock(&localtimeMutex);
+#endif
+    return (tm.tm_hour << 11) | (tm.tm_min << 5) | (tm.tm_sec >> 1);
+}
+
+static int
+ToDosDate(
+    time_t when)
+{
+    struct tm *tmp, tm;
+
+#if !TCL_THREADS || defined(_WIN32)
+    /* Not threaded, or on Win32 which uses thread local storage */
+    tmp = localtime(&when);
+    tm = *tmp;
+#elif /* TCL_THREADS && !_WIN32 && */ defined(HAVE_LOCALTIME_R)
+    /* Threaded, have reentrant API */
+    tmp = &tm;
+    localtime_r(&when, tmp);
+#else /* TCL_THREADS && !_WIN32 && !HAVE_LOCALTIME_R */
+    /* Only using a mutex is safe. */
+    Tcl_MutexLock(&localtimeMutex);
+    tmp = localtime(&when);
+    tm = *tmp;
+    Tcl_MutexUnlock(&localtimeMutex);
+#endif
+    return ((tm.tm_year - 80) << 9) | ((tm.tm_mon + 1) << 5) | tm.tm_mday;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * CountSlashes --
+ *
+ *	This function counts the number of slashes in a pathname string.
+ *
+ * Results:
+ *	Number of slashes found in string.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+CountSlashes(
+    const char *string)
+{
+    int count = 0;
+    const char *p = string;
+
+    while (*p != '\0') {
+	if (*p == '/') {
+	    count++;
+	}
+	p++;
+    }
+    return count;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * CanonicalPath --
+ *
+ *	This function computes the canonical path from a directory and file
+ *	name components into the specified Tcl_DString.
+ *
+ * Results:
+ *	Returns the pointer to the canonical path contained in the specified
+ *	Tcl_DString.
+ *
+ * Side effects:
+ *	Modifies the specified Tcl_DString.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static char *
+CanonicalPath(
+    const char *root,
+    const char *tail,
+    Tcl_DString *dsPtr,
+    int inZipfs)
+{
+    char *path;
+    int i, j, c, isUNC = 0, isVfs = 0, n = 0;
+    int haveZipfsPath = 1;
+
+#ifdef _WIN32
+    if (tail[0] != '\0' && strchr(drvletters, tail[0]) && tail[1] == ':') {
+	tail += 2;
+	haveZipfsPath = 0;
+    }
+    /* UNC style path */
+    if (tail[0] == '\\') {
+	root = "";
+	++tail;
+	haveZipfsPath = 0;
+    }
+    if (tail[0] == '\\') {
+	root = "/";
+	++tail;
+	haveZipfsPath = 0;
+    }
+#endif /* _WIN32 */
+
+    if (haveZipfsPath) {
+	/* UNC style path */
+	if (root && strncmp(root, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN) == 0) {
+	    isVfs = 1;
+	} else if (tail &&
+		strncmp(tail, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN) == 0) {
+	    isVfs = 2;
+	}
+	if (isVfs != 1 && (root[0] == '/') && (root[1] == '/')) {
+	    isUNC = 1;
+	}
+    }
+
+    if (isVfs != 2) {
+	if (tail[0] == '/') {
+	    if (isVfs != 1) {
+		root = "";
+	    }
+	    ++tail;
+	    isUNC = 0;
+	}
+	if (tail[0] == '/') {
+	    if (isVfs != 1) {
+		root = "/";
+	    }
+	    ++tail;
+	    isUNC = 1;
+	}
+    }
+    i = strlen(root);
+    j = strlen(tail);
+
+    switch (isVfs) {
+    case 1:
+	if (i > ZIPFS_VOLUME_LEN) {
+	    Tcl_DStringSetLength(dsPtr, i + j + 1);
+	    path = Tcl_DStringValue(dsPtr);
+	    memcpy(path, root, i);
+	    path[i++] = '/';
+	    memcpy(path + i, tail, j);
+	} else {
+	    Tcl_DStringSetLength(dsPtr, i + j);
+	    path = Tcl_DStringValue(dsPtr);
+	    memcpy(path, root, i);
+	    memcpy(path + i, tail, j);
+	}
+	break;
+    case 2:
+	Tcl_DStringSetLength(dsPtr, j);
+	path = Tcl_DStringValue(dsPtr);
+	memcpy(path, tail, j);
+	break;
+    default:
+	if (inZipfs) {
+	    Tcl_DStringSetLength(dsPtr, i + j + ZIPFS_VOLUME_LEN);
+	    path = Tcl_DStringValue(dsPtr);
+	    memcpy(path, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN);
+	    memcpy(path + ZIPFS_VOLUME_LEN + i , tail, j);
+	} else {
+	    Tcl_DStringSetLength(dsPtr, i + j + 1);
+	    path = Tcl_DStringValue(dsPtr);
+	    memcpy(path, root, i);
+	    path[i++] = '/';
+	    memcpy(path + i, tail, j);
+	}
+	break;
+    }
+
+#ifdef _WIN32
+    for (i = 0; path[i] != '\0'; i++) {
+	if (path[i] == '\\') {
+	    path[i] = '/';
+	}
+    }
+#endif /* _WIN32 */
+
+    if (inZipfs) {
+	n = ZIPFS_VOLUME_LEN;
+    } else {
+	n = 0;
+    }
+
+    for (i = j = n; (c = path[i]) != '\0'; i++) {
+	if (c == '/') {
+	    int c2 = path[i + 1];
+
+	    if (c2 == '\0' || c2 == '/') {
+		continue;
+	    }
+	    if (c2 == '.') {
+		int c3 = path[i + 2];
+
+		if ((c3 == '/') || (c3 == '\0')) {
+		    i++;
+		    continue;
+		}
+		if ((c3 == '.')
+			&& ((path[i + 3] == '/') || (path[i + 3] == '\0'))) {
+		    i += 2;
+		    while ((j > 0) && (path[j - 1] != '/')) {
+			j--;
+		    }
+		    if (j > isUNC) {
+			--j;
+			while ((j > 1 + isUNC) && (path[j - 2] == '/')) {
+			    j--;
+			}
+		    }
+		    continue;
+		}
+	    }
+	}
+	path[j++] = c;
+    }
+    if (j == 0) {
+	path[j++] = '/';
+    }
+    path[j] = 0;
+    Tcl_DStringSetLength(dsPtr, j);
+    return Tcl_DStringValue(dsPtr);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSLookup --
+ *
+ *	This function returns the ZIP entry struct corresponding to the ZIP
+ *	archive member of the given file name. Caller must hold the right
+ *	lock.
+ *
+ * Results:
+ *	Returns the pointer to ZIP entry struct or NULL if the the given file
+ *	name could not be found in the global list of ZIP archive members.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static ZipEntry *
+ZipFSLookup(
+    char *filename)
+{
+    Tcl_HashEntry *hPtr;
+    ZipEntry *z = NULL;
+
+    hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, filename);
+    if (hPtr) {
+	z = Tcl_GetHashValue(hPtr);
+    }
+    return z;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSLookupMount --
+ *
+ *	This function returns an indication if the given file name corresponds
+ *	to a mounted ZIP archive file.
+ *
+ * Results:
+ *	Returns true, if the given file name is a mounted ZIP archive file.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifdef NEVER_USED
+static int
+ZipFSLookupMount(
+    char *filename)
+{
+    Tcl_HashEntry *hPtr;
+    Tcl_HashSearch search;
+
+    for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr;
+	   hPtr = Tcl_NextHashEntry(&search)) {
+	ZipFile *zf = Tcl_GetHashValue(hPtr);
+
+	if (strcmp(zf->mountPoint, filename) == 0) {
+	    return 1;
+	}
+    }
+    return 0;
+}
+#endif /* NEVER_USED */
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSCloseArchive --
+ *
+ *	This function closes a mounted ZIP archive file.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	A memory mapped ZIP archive is unmapped, allocated memory is released.
+ *	The ZipFile pointer is *NOT* deallocated by this function.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static void
+ZipFSCloseArchive(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    ZipFile *zf)
+{
+    if (zf->nameLength) {
+	ckfree(zf->name);
+    }
+    if (zf->isMemBuffer) {
+	/* Pointer to memory */
+	if (zf->ptrToFree) {
+	    ckfree(zf->ptrToFree);
+	    zf->ptrToFree = NULL;
+	}
+	zf->data = NULL;
+	return;
+    }
+
+#ifdef _WIN32
+    if (zf->data && !zf->ptrToFree) {
+	UnmapViewOfFile(zf->data);
+	zf->data = NULL;
+    }
+    if (zf->mountHandle != INVALID_HANDLE_VALUE) {
+	CloseHandle(zf->mountHandle);
+    }
+#else /* !_WIN32 */
+    if ((zf->data != MAP_FAILED) && !zf->ptrToFree) {
+	munmap(zf->data, zf->length);
+	zf->data = MAP_FAILED;
+    }
+#endif /* _WIN32 */
+
+    if (zf->ptrToFree) {
+	ckfree(zf->ptrToFree);
+	zf->ptrToFree = NULL;
+    }
+    if (zf->chan) {
+	Tcl_Close(interp, zf->chan);
+	zf->chan = NULL;
+    }
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSFindTOC --
+ *
+ *	This function takes a memory mapped zip file and indexes the contents.
+ *	When "needZip" is zero an embedded ZIP archive in an executable file
+ *	is accepted.
+ *
+ * Results:
+ *	TCL_OK on success, TCL_ERROR otherwise with an error message placed
+ *	into the given "interp" if it is not NULL.
+ *
+ * Side effects:
+ *	The given ZipFile struct is filled with information about the ZIP
+ *	archive file.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSFindTOC(
+    Tcl_Interp *interp,		/* Current interpreter. NULLable. */
+    int needZip,
+    ZipFile *zf)
+{
+    size_t i;
+    unsigned char *p, *q;
+
+    p = zf->data + zf->length - ZIP_CENTRAL_END_LEN;
+    while (p >= zf->data) {
+	if (*p == (ZIP_CENTRAL_END_SIG & 0xFF)) {
+	    if (ZipReadInt(p) == ZIP_CENTRAL_END_SIG) {
+		break;
+	    }
+	    p -= ZIP_SIG_LEN;
+	} else {
+	    --p;
+	}
+    }
+    if (p < zf->data) {
+	if (!needZip) {
+	    zf->baseOffset = zf->passOffset = zf->length;
+	    return TCL_OK;
+	}
+	ZIPFS_ERROR(interp, "wrong end signature");
+	if (interp) {
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "END_SIG", NULL);
+	}
+	goto error;
+    }
+    zf->numFiles = ZipReadShort(p + ZIP_CENTRAL_ENTS_OFFS);
+    if (zf->numFiles == 0) {
+	if (!needZip) {
+	    zf->baseOffset = zf->passOffset = zf->length;
+	    return TCL_OK;
+	}
+	ZIPFS_ERROR(interp, "empty archive");
+	if (interp) {
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "EMPTY", NULL);
+	}
+	goto error;
+    }
+    q = zf->data + ZipReadInt(p + ZIP_CENTRAL_DIRSTART_OFFS);
+    p -= ZipReadInt(p + ZIP_CENTRAL_DIRSIZE_OFFS);
+    if ((p < zf->data) || (p > zf->data + zf->length)
+	    || (q < zf->data) || (q > zf->data + zf->length)) {
+	if (!needZip) {
+	    zf->baseOffset = zf->passOffset = zf->length;
+	    return TCL_OK;
+	}
+	ZIPFS_ERROR(interp, "archive directory not found");
+	if (interp) {
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_DIR", NULL);
+	}
+	goto error;
+    }
+    zf->baseOffset = zf->passOffset = p - q;
+    zf->directoryOffset = p - zf->data;
+    q = p;
+    for (i = 0; i < zf->numFiles; i++) {
+	int pathlen, comlen, extra;
+
+	if (q + ZIP_CENTRAL_HEADER_LEN > zf->data + zf->length) {
+	    ZIPFS_ERROR(interp, "wrong header length");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "HDR_LEN", NULL);
+	    }
+	    goto error;
+	}
+	if (ZipReadInt(q) != ZIP_CENTRAL_HEADER_SIG) {
+	    ZIPFS_ERROR(interp, "wrong header signature");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "HDR_SIG", NULL);
+	    }
+	    goto error;
+	}
+	pathlen = ZipReadShort(q + ZIP_CENTRAL_PATHLEN_OFFS);
+	comlen = ZipReadShort(q + ZIP_CENTRAL_FCOMMENTLEN_OFFS);
+	extra = ZipReadShort(q + ZIP_CENTRAL_EXTRALEN_OFFS);
+	q += pathlen + comlen + extra + ZIP_CENTRAL_HEADER_LEN;
+    }
+    q = zf->data + zf->baseOffset;
+    if ((zf->baseOffset >= 6) && (ZipReadInt(q - 4) == ZIP_PASSWORD_END_SIG)) {
+	i = q[-5];
+	if (q - 5 - i > zf->data) {
+	    zf->passBuf[0] = i;
+	    memcpy(zf->passBuf + 1, q - 5 - i, i);
+	    zf->passOffset -= i ? (5 + i) : 0;
+	}
+    }
+    return TCL_OK;
+
+  error:
+    ZipFSCloseArchive(interp, zf);
+    return TCL_ERROR;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSOpenArchive --
+ *
+ *	This function opens a ZIP archive file for reading. An attempt is made
+ *	to memory map that file. Otherwise it is read into an allocated memory
+ *	buffer. The ZIP archive header is verified and must be valid for the
+ *	function to succeed. When "needZip" is zero an embedded ZIP archive in
+ *	an executable file is accepted.
+ *
+ * Results:
+ *	TCL_OK on success, TCL_ERROR otherwise with an error message placed
+ *	into the given "interp" if it is not NULL.
+ *
+ * Side effects:
+ *	ZIP archive is memory mapped or read into allocated memory, the given
+ *	ZipFile struct is filled with information about the ZIP archive file.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSOpenArchive(
+    Tcl_Interp *interp,		/* Current interpreter. NULLable. */
+    const char *zipname,	/* Path to ZIP file to open. */
+    int needZip,
+    ZipFile *zf)
+{
+    size_t i;
+    ClientData handle;
+
+    zf->nameLength = 0;
+    zf->isMemBuffer = 0;
+#ifdef _WIN32
+    zf->data = NULL;
+    zf->mountHandle = INVALID_HANDLE_VALUE;
+#else /* !_WIN32 */
+    zf->data = MAP_FAILED;
+#endif /* _WIN32 */
+    zf->length = 0;
+    zf->numFiles = 0;
+    zf->baseOffset = zf->passOffset = 0;
+    zf->ptrToFree = NULL;
+    zf->passBuf[0] = 0;
+    zf->chan = Tcl_OpenFileChannel(interp, zipname, "rb", 0);
+    if (!zf->chan) {
+	return TCL_ERROR;
+    }
+    if (Tcl_GetChannelHandle(zf->chan, TCL_READABLE, &handle) != TCL_OK) {
+	zf->length = Tcl_Seek(zf->chan, 0, SEEK_END);
+	if (zf->length == ERROR_LENGTH) {
+	    ZIPFS_POSIX_ERROR(interp, "seek error");
+	    goto error;
+	}
+	if ((zf->length - ZIP_CENTRAL_END_LEN)
+		> (64 * 1024 * 1024 - ZIP_CENTRAL_END_LEN)) {
+	    ZIPFS_ERROR(interp, "illegal file size");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "FILE_SIZE", NULL);
+	    }
+	    goto error;
+	}
+	if (Tcl_Seek(zf->chan, 0, SEEK_SET) == -1) {
+	    ZIPFS_POSIX_ERROR(interp, "seek error");
+	    goto error;
+	}
+	zf->ptrToFree = zf->data = attemptckalloc(zf->length);
+	if (!zf->ptrToFree) {
+	    ZIPFS_ERROR(interp, "out of memory");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+	    }
+	    goto error;
+	}
+	i = Tcl_Read(zf->chan, (char *) zf->data, zf->length);
+	if (i != zf->length) {
+	    ZIPFS_POSIX_ERROR(interp, "file read error");
+	    goto error;
+	}
+	Tcl_Close(interp, zf->chan);
+	zf->chan = NULL;
+    } else {
+#ifdef _WIN32
+	int readSuccessful;
+#   ifdef _WIN64
+	i = GetFileSizeEx((HANDLE) handle, (PLARGE_INTEGER) &zf->length);
+	readSuccessful = (i != 0);
+#   else /* !_WIN64 */
+	zf->length = GetFileSize((HANDLE) handle, 0);
+	readSuccessful = (zf->length != (size_t) INVALID_FILE_SIZE);
+#   endif /* _WIN64 */
+	if (!readSuccessful || (zf->length < ZIP_CENTRAL_END_LEN)) {
+	    ZIPFS_POSIX_ERROR(interp, "invalid file size");
+	    goto error;
+	}
+	zf->mountHandle = CreateFileMapping((HANDLE) handle, 0, PAGE_READONLY,
+		0, zf->length, 0);
+	if (zf->mountHandle == INVALID_HANDLE_VALUE) {
+	    ZIPFS_POSIX_ERROR(interp, "file mapping failed");
+	    goto error;
+	}
+	zf->data = MapViewOfFile(zf->mountHandle, FILE_MAP_READ, 0, 0,
+		zf->length);
+	if (!zf->data) {
+	    ZIPFS_POSIX_ERROR(interp, "file mapping failed");
+	    goto error;
+	}
+#else /* !_WIN32 */
+	zf->length = lseek(PTR2INT(handle), 0, SEEK_END);
+	if (zf->length == ERROR_LENGTH || zf->length < ZIP_CENTRAL_END_LEN) {
+	    ZIPFS_POSIX_ERROR(interp, "invalid file size");
+	    goto error;
+	}
+	lseek(PTR2INT(handle), 0, SEEK_SET);
+	zf->data = (unsigned char *) mmap(0, zf->length, PROT_READ,
+		MAP_FILE | MAP_PRIVATE, PTR2INT(handle), 0);
+	if (zf->data == MAP_FAILED) {
+	    ZIPFS_POSIX_ERROR(interp, "file mapping failed");
+	    goto error;
+	}
+#endif /* _WIN32 */
+    }
+    return ZipFSFindTOC(interp, needZip, zf);
+
+  error:
+    ZipFSCloseArchive(interp, zf);
+    return TCL_ERROR;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSRootNode --
+ *
+ *	This function generates the root node for a ZIPFS filesystem.
+ *
+ * Results:
+ *	TCL_OK on success, TCL_ERROR otherwise with an error message placed
+ *	into the given "interp" if it is not NULL.
+ *
+ * Side effects:
+ *	...
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSCatalogFilesystem(
+    Tcl_Interp *interp,		/* Current interpreter. NULLable. */
+    ZipFile *zf0,
+    const char *mountPoint,	/* Mount point path. */
+    const char *passwd,		/* Password for opening the ZIP, or NULL if
+				 * the ZIP is unprotected. */
+    const char *zipname)	/* Path to ZIP file to build a catalog of. */
+{
+    int pwlen, isNew;
+    size_t i;
+    ZipFile *zf;
+    ZipEntry *z;
+    Tcl_HashEntry *hPtr;
+    Tcl_DString ds, dsm, fpBuf;
+    unsigned char *q;
+
+    /*
+     * Basic verification of the password for sanity.
+     */
+
+    pwlen = 0;
+    if (passwd) {
+	pwlen = strlen(passwd);
+	if ((pwlen > 255) || strchr(passwd, 0xff)) {
+	    if (interp) {
+		Tcl_SetObjResult(interp,
+			Tcl_NewStringObj("illegal password", -1));
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_PASS", NULL);
+	    }
+	    return TCL_ERROR;
+	}
+    }
+
+    WriteLock();
+
+    /*
+     * Mount point sometimes is a relative or otherwise denormalized path.
+     * But an absolute name is needed as mount point here.
+     */
+
+    Tcl_DStringInit(&ds);
+    Tcl_DStringInit(&dsm);
+    if (strcmp(mountPoint, "/") == 0) {
+	mountPoint = "";
+    } else {
+	mountPoint = CanonicalPath("", mountPoint, &dsm, 1);
+    }
+    hPtr = Tcl_CreateHashEntry(&ZipFS.zipHash, mountPoint, &isNew);
+    if (!isNew) {
+	if (interp) {
+	    zf = Tcl_GetHashValue(hPtr);
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "%s is already mounted on %s", zf->name, mountPoint));
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "MOUNTED", NULL);
+	}
+	Unlock();
+	ZipFSCloseArchive(interp, zf0);
+	return TCL_ERROR;
+    }
+    zf = attemptckalloc(sizeof(ZipFile) + strlen(mountPoint) + 1);
+    if (!zf) {
+	if (interp) {
+	    Tcl_AppendResult(interp, "out of memory", (char *) NULL);
+	    Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+	}
+	Unlock();
+	ZipFSCloseArchive(interp, zf0);
+	return TCL_ERROR;
+    }
+    Unlock();
+
+    *zf = *zf0;
+    zf->mountPoint = Tcl_GetHashKey(&ZipFS.zipHash, hPtr);
+    zf->mountPointLen = strlen(zf->mountPoint);
+    zf->nameLength = strlen(zipname);
+    zf->name = ckalloc(zf->nameLength + 1);
+    memcpy(zf->name, zipname, zf->nameLength + 1);
+    zf->entries = NULL;
+    zf->topEnts = NULL;
+    zf->numOpen = 0;
+    Tcl_SetHashValue(hPtr, zf);
+    if ((zf->passBuf[0] == 0) && pwlen) {
+	int k = 0;
+
+	zf->passBuf[k++] = pwlen;
+	for (i = pwlen; i-- > 0 ;) {
+	    zf->passBuf[k++] = (passwd[i] & 0x0f)
+		    | pwrot[(passwd[i] >> 4) & 0x0f];
+	}
+	zf->passBuf[k] = '\0';
+    }
+    if (mountPoint[0] != '\0') {
+	hPtr = Tcl_CreateHashEntry(&ZipFS.fileHash, mountPoint, &isNew);
+	if (isNew) {
+	    z = ckalloc(sizeof(ZipEntry));
+	    Tcl_SetHashValue(hPtr, z);
+
+	    z->tnext = NULL;
+	    z->depth = CountSlashes(mountPoint);
+	    z->zipFilePtr = zf;
+	    z->isDirectory = (zf->baseOffset == 0) ? 1 : -1; /* root marker */
+	    z->isEncrypted = 0;
+	    z->offset = zf->baseOffset;
+	    z->crc32 = 0;
+	    z->timestamp = 0;
+	    z->numBytes = z->numCompressedBytes = 0;
+	    z->compressMethod = ZIP_COMPMETH_STORED;
+	    z->data = NULL;
+	    z->name = Tcl_GetHashKey(&ZipFS.fileHash, hPtr);
+	    z->next = zf->entries;
+	    zf->entries = z;
+	}
+    }
+    q = zf->data + zf->directoryOffset;
+    Tcl_DStringInit(&fpBuf);
+    for (i = 0; i < zf->numFiles; i++) {
+	int extra, isdir = 0, dosTime, dosDate, nbcompr;
+	size_t offs, pathlen, comlen;
+	unsigned char *lq, *gq = NULL;
+	char *fullpath, *path;
+
+	pathlen = ZipReadShort(q + ZIP_CENTRAL_PATHLEN_OFFS);
+	comlen = ZipReadShort(q + ZIP_CENTRAL_FCOMMENTLEN_OFFS);
+	extra = ZipReadShort(q + ZIP_CENTRAL_EXTRALEN_OFFS);
+	Tcl_DStringSetLength(&ds, 0);
+	Tcl_DStringAppend(&ds, (char *) q + ZIP_CENTRAL_HEADER_LEN, pathlen);
+	path = Tcl_DStringValue(&ds);
+	if ((pathlen > 0) && (path[pathlen - 1] == '/')) {
+	    Tcl_DStringSetLength(&ds, pathlen - 1);
+	    path = Tcl_DStringValue(&ds);
+	    isdir = 1;
+	}
+	if ((strcmp(path, ".") == 0) || (strcmp(path, "..") == 0)) {
+	    goto nextent;
+	}
+	lq = zf->data + zf->baseOffset
+		+ ZipReadInt(q + ZIP_CENTRAL_LOCALHDR_OFFS);
+	if ((lq < zf->data) || (lq > zf->data + zf->length)) {
+	    goto nextent;
+	}
+	nbcompr = ZipReadInt(lq + ZIP_LOCAL_COMPLEN_OFFS);
+	if (!isdir && (nbcompr == 0)
+		&& (ZipReadInt(lq + ZIP_LOCAL_UNCOMPLEN_OFFS) == 0)
+		&& (ZipReadInt(lq + ZIP_LOCAL_CRC32_OFFS) == 0)) {
+	    gq = q;
+	    nbcompr = ZipReadInt(gq + ZIP_CENTRAL_COMPLEN_OFFS);
+	}
+	offs = (lq - zf->data)
+		+ ZIP_LOCAL_HEADER_LEN
+		+ ZipReadShort(lq + ZIP_LOCAL_PATHLEN_OFFS)
+		+ ZipReadShort(lq + ZIP_LOCAL_EXTRALEN_OFFS);
+	if (offs + nbcompr > zf->length) {
+	    goto nextent;
+	}
+	if (!isdir && (mountPoint[0] == '\0') && !CountSlashes(path)) {
+#ifdef ANDROID
+	    /*
+	     * When mounting the ZIP archive on the root directory try to
+	     * remap top level regular files of the archive to
+	     * /assets/.root/... since this directory should not be in a valid
+	     * APK due to the leading dot in the file name component. This
+	     * trick should make the files AndroidManifest.xml,
+	     * resources.arsc, and classes.dex visible to Tcl.
+	     */
+	    Tcl_DString ds2;
+
+	    Tcl_DStringInit(&ds2);
+	    Tcl_DStringAppend(&ds2, "assets/.root/", -1);
+	    Tcl_DStringAppend(&ds2, path, -1);
+	    hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, Tcl_DStringValue(&ds2));
+	    if (hPtr) {
+		/* should not happen but skip it anyway */
+		Tcl_DStringFree(&ds2);
+		goto nextent;
+	    }
+	    Tcl_DStringSetLength(&ds, 0);
+	    Tcl_DStringAppend(&ds, Tcl_DStringValue(&ds2),
+		    Tcl_DStringLength(&ds2));
+	    path = Tcl_DStringValue(&ds);
+	    Tcl_DStringFree(&ds2);
+#else /* !ANDROID */
+	    /*
+	     * Regular files skipped when mounting on root.
+	     */
+	    goto nextent;
+#endif /* ANDROID */
+	}
+	Tcl_DStringSetLength(&fpBuf, 0);
+	fullpath = CanonicalPath(mountPoint, path, &fpBuf, 1);
+	z = ckalloc(sizeof(ZipEntry));
+	z->name = NULL;
+	z->tnext = NULL;
+	z->depth = CountSlashes(fullpath);
+	z->zipFilePtr = zf;
+	z->isDirectory = isdir;
+	z->isEncrypted = (ZipReadShort(lq + ZIP_LOCAL_FLAGS_OFFS) & 1)
+		&& (nbcompr > 12);
+	z->offset = offs;
+	if (gq) {
+	    z->crc32 = ZipReadInt(gq + ZIP_CENTRAL_CRC32_OFFS);
+	    dosDate = ZipReadShort(gq + ZIP_CENTRAL_MDATE_OFFS);
+	    dosTime = ZipReadShort(gq + ZIP_CENTRAL_MTIME_OFFS);
+	    z->timestamp = DosTimeDate(dosDate, dosTime);
+	    z->numBytes = ZipReadInt(gq + ZIP_CENTRAL_UNCOMPLEN_OFFS);
+	    z->compressMethod = ZipReadShort(gq + ZIP_CENTRAL_COMPMETH_OFFS);
+	} else {
+	    z->crc32 = ZipReadInt(lq + ZIP_LOCAL_CRC32_OFFS);
+	    dosDate = ZipReadShort(lq + ZIP_LOCAL_MDATE_OFFS);
+	    dosTime = ZipReadShort(lq + ZIP_LOCAL_MTIME_OFFS);
+	    z->timestamp = DosTimeDate(dosDate, dosTime);
+	    z->numBytes = ZipReadInt(lq + ZIP_LOCAL_UNCOMPLEN_OFFS);
+	    z->compressMethod = ZipReadShort(lq + ZIP_LOCAL_COMPMETH_OFFS);
+	}
+	z->numCompressedBytes = nbcompr;
+	z->data = NULL;
+	hPtr = Tcl_CreateHashEntry(&ZipFS.fileHash, fullpath, &isNew);
+	if (!isNew) {
+	    /* should not happen but skip it anyway */
+	    ckfree(z);
+	} else {
+	    Tcl_SetHashValue(hPtr, z);
+	    z->name = Tcl_GetHashKey(&ZipFS.fileHash, hPtr);
+	    z->next = zf->entries;
+	    zf->entries = z;
+	    if (isdir && (mountPoint[0] == '\0') && (z->depth == 1)) {
+		z->tnext = zf->topEnts;
+		zf->topEnts = z;
+	    }
+	    if (!z->isDirectory && (z->depth > 1)) {
+		char *dir, *end;
+		ZipEntry *zd;
+
+		Tcl_DStringSetLength(&ds, strlen(z->name) + 8);
+		Tcl_DStringSetLength(&ds, 0);
+		Tcl_DStringAppend(&ds, z->name, -1);
+		dir = Tcl_DStringValue(&ds);
+		for (end = strrchr(dir, '/'); end && (end != dir);
+			end = strrchr(dir, '/')) {
+		    Tcl_DStringSetLength(&ds, end - dir);
+		    hPtr = Tcl_CreateHashEntry(&ZipFS.fileHash, dir, &isNew);
+		    if (!isNew) {
+			break;
+		    }
+		    zd = ckalloc(sizeof(ZipEntry));
+		    zd->name = NULL;
+		    zd->tnext = NULL;
+		    zd->depth = CountSlashes(dir);
+		    zd->zipFilePtr = zf;
+		    zd->isDirectory = 1;
+		    zd->isEncrypted = 0;
+		    zd->offset = z->offset;
+		    zd->crc32 = 0;
+		    zd->timestamp = z->timestamp;
+		    zd->numBytes = zd->numCompressedBytes = 0;
+		    zd->compressMethod = ZIP_COMPMETH_STORED;
+		    zd->data = NULL;
+		    Tcl_SetHashValue(hPtr, zd);
+		    zd->name = Tcl_GetHashKey(&ZipFS.fileHash, hPtr);
+		    zd->next = zf->entries;
+		    zf->entries = zd;
+		    if ((mountPoint[0] == '\0') && (zd->depth == 1)) {
+			zd->tnext = zf->topEnts;
+			zf->topEnts = zd;
+		    }
+		}
+	    }
+	}
+    nextent:
+	q += pathlen + comlen + extra + ZIP_CENTRAL_HEADER_LEN;
+    }
+    Tcl_DStringFree(&fpBuf);
+    Tcl_DStringFree(&ds);
+    Tcl_FSMountsChanged(NULL);
+    Unlock();
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipfsSetup --
+ *
+ *	Common initialisation code. ZipFS.initialized must *not* be set prior
+ *	to the call.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static void
+ZipfsSetup(void)
+{
+#if TCL_THREADS
+    static const Tcl_Time t = { 0, 0 };
+
+    /*
+     * Inflate condition variable.
+     */
+
+    Tcl_MutexLock(&ZipFSMutex);
+    Tcl_ConditionWait(&ZipFSCond, &ZipFSMutex, &t);
+    Tcl_MutexUnlock(&ZipFSMutex);
+#endif /* TCL_THREADS */
+
+    Tcl_FSRegister(NULL, &zipfsFilesystem);
+    Tcl_InitHashTable(&ZipFS.fileHash, TCL_STRING_KEYS);
+    Tcl_InitHashTable(&ZipFS.zipHash, TCL_STRING_KEYS);
+    ZipFS.idCount = 1;
+    ZipFS.wrmax = DEFAULT_WRITE_MAX_SIZE;
+    ZipFS.initialized = 1;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ListMountPoints --
+ *
+ *	This procedure lists the mount points and what's mounted there, or
+ *	reports whether there are any mounts (if there's no interpreter). The
+ *	read lock must be held by the caller.
+ *
+ * Results:
+ *	A standard Tcl result. TCL_OK (or TCL_BREAK if no mounts and no
+ *	interpreter).
+ *
+ * Side effects:
+ *	Interpreter result may be updated.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static inline int
+ListMountPoints(
+    Tcl_Interp *interp)
+{
+    Tcl_HashEntry *hPtr;
+    Tcl_HashSearch search;
+    ZipFile *zf;
+
+    for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr;
+	    hPtr = Tcl_NextHashEntry(&search)) {
+	if (!interp) {
+	    return TCL_OK;
+	}
+	zf = Tcl_GetHashValue(hPtr);
+	Tcl_AppendElement(interp, zf->mountPoint);
+	Tcl_AppendElement(interp, zf->name);
+    }
+    return (interp ? TCL_OK : TCL_BREAK);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * DescribeMounted --
+ *
+ *	This procedure describes what is mounted at the given the mount point.
+ *	The interpreter result is not updated if there is nothing mounted at
+ *	the given point. The read lock must be held by the caller.
+ *
+ * Results:
+ *	A standard Tcl result. TCL_OK (or TCL_BREAK if nothing mounted there
+ *	and no interpreter).
+ *
+ * Side effects:
+ *	Interpreter result may be updated.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static inline int
+DescribeMounted(
+    Tcl_Interp *interp,
+    const char *mountPoint)
+{
+    Tcl_HashEntry *hPtr;
+    ZipFile *zf;
+
+    if (interp) {
+	hPtr = Tcl_FindHashEntry(&ZipFS.zipHash, mountPoint);
+	if (hPtr) {
+	    zf = Tcl_GetHashValue(hPtr);
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(zf->name, -1));
+	    return TCL_OK;
+	}
+    }
+    return (interp ? TCL_OK : TCL_BREAK);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * TclZipfs_Mount --
+ *
+ *	This procedure is invoked to mount a given ZIP archive file on a given
+ *	mountpoint with optional ZIP password.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	A ZIP archive file is read, analyzed and mounted, resources are
+ *	allocated.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+int
+TclZipfs_Mount(
+    Tcl_Interp *interp,		/* Current interpreter. NULLable. */
+    const char *mountPoint,	/* Mount point path. */
+    const char *zipname,	/* Path to ZIP file to mount. */
+    const char *passwd)		/* Password for opening the ZIP, or NULL if
+				 * the ZIP is unprotected. */
+{
+    ZipFile *zf;
+
+    ReadLock();
+    if (!ZipFS.initialized) {
+	ZipfsSetup();
+    }
+
+    /*
+     * No mount point, so list all mount points and what is mounted there.
+     */
+
+    if (!mountPoint) {
+	int ret = ListMountPoints(interp);
+	Unlock();
+	return ret;
+    }
+
+    /*
+     * Mount point but no file, so describe what is mounted at that mount
+     * point.
+     */
+
+    if (!zipname) {
+	DescribeMounted(interp, mountPoint);
+	Unlock();
+	return TCL_OK;
+    }
+    Unlock();
+
+    /*
+     * Have both a mount point and a file (name) to mount there.
+     */
+
+    if (passwd) {
+	if ((strlen(passwd) > 255) || strchr(passwd, 0xff)) {
+	    if (interp) {
+		Tcl_SetObjResult(interp,
+			Tcl_NewStringObj("illegal password", -1));
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_PASS", NULL);
+	    }
+	    return TCL_ERROR;
+	}
+    }
+    zf = attemptckalloc(sizeof(ZipFile) + strlen(mountPoint) + 1);
+    if (!zf) {
+	if (interp) {
+	    Tcl_AppendResult(interp, "out of memory", (char *) NULL);
+	    Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+	}
+	return TCL_ERROR;
+    }
+    if (ZipFSOpenArchive(interp, zipname, 1, zf) != TCL_OK) {
+	return TCL_ERROR;
+    }
+    return ZipFSCatalogFilesystem(interp, zf, mountPoint, passwd, zipname);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * TclZipfs_MountBuffer --
+ *
+ *	This procedure is invoked to mount a given ZIP archive file on a given
+ *	mountpoint with optional ZIP password.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	A ZIP archive file is read, analyzed and mounted, resources are
+ *	allocated.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+int
+TclZipfs_MountBuffer(
+    Tcl_Interp *interp,		/* Current interpreter. NULLable. */
+    const char *mountPoint,	/* Mount point path. */
+    unsigned char *data,
+    size_t datalen,
+    int copy)
+{
+    ZipFile *zf;
+
+    ReadLock();
+    if (!ZipFS.initialized) {
+	ZipfsSetup();
+    }
+
+    /*
+     * No mount point, so list all mount points and what is mounted there.
+     */
+
+    if (!mountPoint) {
+	int ret = ListMountPoints(interp);
+	Unlock();
+	return ret;
+    }
+
+    /*
+     * Mount point but no data, so describe what is mounted at that mount
+     * point.
+     */
+
+    if (!data) {
+	DescribeMounted(interp, mountPoint);
+	Unlock();
+	return TCL_OK;
+    }
+    Unlock();
+
+    /*
+     * Have both a mount point and data to mount there.
+     */
+
+    zf = attemptckalloc(sizeof(ZipFile) + strlen(mountPoint) + 1);
+    if (!zf) {
+	if (interp) {
+	    Tcl_AppendResult(interp, "out of memory", (char *) NULL);
+	    Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+	}
+	return TCL_ERROR;
+    }
+    zf->isMemBuffer = 1;
+    zf->length = datalen;
+    if (copy) {
+	zf->data = attemptckalloc(datalen);
+	if (!zf->data) {
+	    if (interp) {
+		Tcl_AppendResult(interp, "out of memory", (char *) NULL);
+		Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+	    }
+	    return TCL_ERROR;
+	}
+	memcpy(zf->data, data, datalen);
+	zf->ptrToFree = zf->data;
+    } else {
+	zf->data = data;
+	zf->ptrToFree = NULL;
+    }
+    if (ZipFSFindTOC(interp, 0, zf) != TCL_OK) {
+	return TCL_ERROR;
+    }
+    return ZipFSCatalogFilesystem(interp, zf, mountPoint, NULL,
+	    "Memory Buffer");
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * TclZipfs_Unmount --
+ *
+ *	This procedure is invoked to unmount a given ZIP archive.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	A mounted ZIP archive file is unmounted, resources are free'd.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+int
+TclZipfs_Unmount(
+    Tcl_Interp *interp,		/* Current interpreter. NULLable. */
+    const char *mountPoint)	/* Mount point path. */
+{
+    ZipFile *zf;
+    ZipEntry *z, *znext;
+    Tcl_HashEntry *hPtr;
+    Tcl_DString dsm;
+    int ret = TCL_OK, unmounted = 0;
+
+    WriteLock();
+    if (!ZipFS.initialized) {
+	goto done;
+    }
+
+    /*
+     * Mount point sometimes is a relative or otherwise denormalized path.
+     * But an absolute name is needed as mount point here.
+     */
+
+    Tcl_DStringInit(&dsm);
+    mountPoint = CanonicalPath("", mountPoint, &dsm, 1);
+
+    hPtr = Tcl_FindHashEntry(&ZipFS.zipHash, mountPoint);
+    /* don't report no-such-mount as an error */
+    if (!hPtr) {
+	goto done;
+    }
+
+    zf = Tcl_GetHashValue(hPtr);
+    if (zf->numOpen > 0) {
+	ZIPFS_ERROR(interp, "filesystem is busy");
+	ret = TCL_ERROR;
+	goto done;
+    }
+    Tcl_DeleteHashEntry(hPtr);
+    for (z = zf->entries; z; z = znext) {
+	znext = z->next;
+	hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, z->name);
+	if (hPtr) {
+	    Tcl_DeleteHashEntry(hPtr);
+	}
+	if (z->data) {
+	    ckfree(z->data);
+	}
+	ckfree(z);
+    }
+    ZipFSCloseArchive(interp, zf);
+    ckfree(zf);
+    unmounted = 1;
+  done:
+    Unlock();
+    if (unmounted) {
+	Tcl_FSMountsChanged(NULL);
+    }
+    return ret;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSMountObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs mount] command.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	A ZIP archive file is mounted, resources are allocated.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSMountObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    if (objc > 4) {
+	Tcl_WrongNumArgs(interp, 1, objv,
+		 "?mountpoint? ?zipfile? ?password?");
+	return TCL_ERROR;
+    }
+
+    return TclZipfs_Mount(interp, (objc > 1) ? Tcl_GetString(objv[1]) : NULL,
+	    (objc > 2) ? Tcl_GetString(objv[2]) : NULL,
+	    (objc > 3) ? Tcl_GetString(objv[3]) : NULL);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSMountBufferObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs mount_data] command.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	A ZIP archive file is mounted, resources are allocated.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSMountBufferObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    const char *mountPoint;	/* Mount point path. */
+    unsigned char *data;
+    int length;
+
+    if (objc > 4) {
+	Tcl_WrongNumArgs(interp, 1, objv, "?mountpoint? ?data?");
+	return TCL_ERROR;
+    }
+    if (objc < 2) {
+	int ret;
+
+	ReadLock();
+	ret = ListMountPoints(interp);
+	Unlock();
+	return ret;
+    }
+
+    mountPoint = Tcl_GetString(objv[1]);
+    if (objc < 3) {
+	ReadLock();
+	DescribeMounted(interp, mountPoint);
+	Unlock();
+	return TCL_OK;
+    }
+
+    data = Tcl_GetByteArrayFromObj(objv[2], &length);
+    return TclZipfs_MountBuffer(interp, mountPoint, data, length, 1);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSRootObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs root] command. It
+ *	returns the root that all zipfs file systems are mounted under.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSRootObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    Tcl_SetObjResult(interp, Tcl_NewStringObj(ZIPFS_VOLUME, -1));
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSUnmountObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs unmount] command.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	A mounted ZIP archive file is unmounted, resources are free'd.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSUnmountObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    if (objc != 2) {
+	Tcl_WrongNumArgs(interp, 1, objv, "zipfile");
+	return TCL_ERROR;
+    }
+    return TclZipfs_Unmount(interp, Tcl_GetString(objv[1]));
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSMkKeyObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs mkkey] command.  It
+ *	produces a rotated password to be embedded into an image file.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSMkKeyObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    int len, i = 0;
+    char *pw, passBuf[264];
+
+    if (objc != 2) {
+	Tcl_WrongNumArgs(interp, 1, objv, "password");
+	return TCL_ERROR;
+    }
+    pw = Tcl_GetString(objv[1]);
+    len = strlen(pw);
+    if (len == 0) {
+	return TCL_OK;
+    }
+    if ((len > 255) || strchr(pw, 0xff)) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj("illegal password", -1));
+	return TCL_ERROR;
+    }
+    while (len > 0) {
+	int ch = pw[len - 1];
+
+	passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f];
+	i++;
+	len--;
+    }
+    passBuf[i] = i;
+    ++i;
+    passBuf[i++] = (char) ZIP_PASSWORD_END_SIG;
+    passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 8);
+    passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 16);
+    passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 24);
+    passBuf[i] = '\0';
+    Tcl_AppendResult(interp, passBuf, (char *) NULL);
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipAddFile --
+ *
+ *	This procedure is used by ZipFSMkZipOrImgCmd() to add a single file to
+ *	the output ZIP archive file being written. A ZipEntry struct about the
+ *	input file is added to the given fileHash table for later creation of
+ *	the central ZIP directory.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	Input file is read and (compressed and) written to the output ZIP
+ *	archive file.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipAddFile(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    const char *path,
+    const char *name,
+    Tcl_Channel out,
+    const char *passwd,		/* Password for encoding the file, or NULL if
+				 * the file is to be unprotected. */
+    char *buf,
+    int bufsize,
+    Tcl_HashTable *fileHash)
+{
+    Tcl_Channel in;
+    Tcl_HashEntry *hPtr;
+    ZipEntry *z;
+    z_stream stream;
+    const char *zpath;
+    int crc, flush, zpathlen;
+    size_t nbyte, nbytecompr, len, olen, align = 0;
+    Tcl_WideInt pos[3];
+    int mtime = 0, isNew, compMeth;
+    unsigned long keys[3], keys0[3];
+    char obuf[4096];
+
+    /*
+     * Trim leading '/' characters. If this results in an empty string, we've
+     * nothing to do.
+     */
+
+    zpath = name;
+    while (zpath && zpath[0] == '/') {
+	zpath++;
+    }
+    if (!zpath || (zpath[0] == '\0')) {
+	return TCL_OK;
+    }
+
+    zpathlen = strlen(zpath);
+    if (zpathlen + ZIP_CENTRAL_HEADER_LEN > bufsize) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"path too long for \"%s\"", path));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "PATH_LEN", NULL);
+	return TCL_ERROR;
+    }
+    in = Tcl_OpenFileChannel(interp, path, "rb", 0);
+    if (!in) {
+#ifdef _WIN32
+	/* hopefully a directory */
+	if (strcmp("permission denied", Tcl_PosixError(interp)) == 0) {
+	    Tcl_Close(interp, in);
+	    return TCL_OK;
+	}
+#endif /* _WIN32 */
+	Tcl_Close(interp, in);
+	return TCL_ERROR;
+    } else {
+	Tcl_Obj *pathObj = Tcl_NewStringObj(path, -1);
+	Tcl_StatBuf statBuf;
+
+	Tcl_IncrRefCount(pathObj);
+	if (Tcl_FSStat(pathObj, &statBuf) != -1) {
+	    mtime = statBuf.st_mtime;
+	}
+	Tcl_DecrRefCount(pathObj);
+    }
+    Tcl_ResetResult(interp);
+    crc = 0;
+    nbyte = nbytecompr = 0;
+    while (1) {
+	len = Tcl_Read(in, buf, bufsize);
+	if (len == ERROR_LENGTH) {
+	    if (nbyte == 0 && errno == EISDIR) {
+		Tcl_Close(interp, in);
+		return TCL_OK;
+	    }
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf("read error on \"%s\": %s",
+		    path, Tcl_PosixError(interp)));
+	    Tcl_Close(interp, in);
+	    return TCL_ERROR;
+	}
+	if (len == 0) {
+	    break;
+	}
+	crc = crc32(crc, (unsigned char *) buf, len);
+	nbyte += len;
+    }
+    if (Tcl_Seek(in, 0, SEEK_SET) == -1) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf("seek error on \"%s\": %s",
+		path, Tcl_PosixError(interp)));
+	Tcl_Close(interp, in);
+	return TCL_ERROR;
+    }
+    pos[0] = Tcl_Tell(out);
+    memset(buf, '\0', ZIP_LOCAL_HEADER_LEN);
+    memcpy(buf + ZIP_LOCAL_HEADER_LEN, zpath, zpathlen);
+    len = zpathlen + ZIP_LOCAL_HEADER_LEN;
+    if ((size_t) Tcl_Write(out, buf, len) != len) {
+    wrerr:
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"write error on %s: %s", path, Tcl_PosixError(interp)));
+	Tcl_Close(interp, in);
+	return TCL_ERROR;
+    }
+    if ((len + pos[0]) & 3) {
+	unsigned char abuf[8];
+
+	/*
+	 * Align payload to next 4-byte boundary using a dummy extra entry
+	 * similar to the zipalign tool from Android's SDK.
+	 */
+
+	align = 4 + ((len + pos[0]) & 3);
+	ZipWriteShort(abuf, 0xffff);
+	ZipWriteShort(abuf + 2, align - 4);
+	ZipWriteInt(abuf + 4, 0x03020100);
+	if ((size_t) Tcl_Write(out, (const char *) abuf, align) != align) {
+	    goto wrerr;
+	}
+    }
+    if (passwd) {
+	int i, ch, tmp;
+	unsigned char kvbuf[24];
+	Tcl_Obj *ret;
+
+	init_keys(passwd, keys, crc32tab);
+	for (i = 0; i < 12 - 2; i++) {
+	    double r;
+
+	    if (Tcl_EvalEx(interp, "::tcl::mathfunc::rand", -1, 0) != TCL_OK) {
+		Tcl_Obj *eiPtr = Tcl_ObjPrintf(
+			"\n    (evaluating PRNG step %d for password encoding)",
+			i);
+
+		Tcl_AppendObjToErrorInfo(interp, eiPtr);
+		Tcl_Close(interp, in);
+		return TCL_ERROR;
+	    }
+	    ret = Tcl_GetObjResult(interp);
+	    if (Tcl_GetDoubleFromObj(interp, ret, &r) != TCL_OK) {
+		Tcl_Obj *eiPtr = Tcl_ObjPrintf(
+			"\n    (evaluating PRNG step %d for password encoding)",
+			i);
+
+		Tcl_AppendObjToErrorInfo(interp, eiPtr);
+		Tcl_Close(interp, in);
+		return TCL_ERROR;
+	    }
+	    ch = (int) (r * 256);
+	    kvbuf[i + 12] = (unsigned char) zencode(keys, crc32tab, ch, tmp);
+	}
+	Tcl_ResetResult(interp);
+	init_keys(passwd, keys, crc32tab);
+	for (i = 0; i < 12 - 2; i++) {
+	    kvbuf[i] = (unsigned char)
+		    zencode(keys, crc32tab, kvbuf[i + 12], tmp);
+	}
+	kvbuf[i++] = (unsigned char) zencode(keys, crc32tab, crc >> 16, tmp);
+	kvbuf[i++] = (unsigned char) zencode(keys, crc32tab, crc >> 24, tmp);
+	len = Tcl_Write(out, (char *) kvbuf, 12);
+	memset(kvbuf, 0, 24);
+	if (len != 12) {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "write error on %s: %s", path, Tcl_PosixError(interp)));
+	    Tcl_Close(interp, in);
+	    return TCL_ERROR;
+	}
+	memcpy(keys0, keys, sizeof(keys0));
+	nbytecompr += 12;
+    }
+    Tcl_Flush(out);
+    pos[2] = Tcl_Tell(out);
+    compMeth = ZIP_COMPMETH_DEFLATED;
+    memset(&stream, 0, sizeof(z_stream));
+    stream.zalloc = Z_NULL;
+    stream.zfree = Z_NULL;
+    stream.opaque = Z_NULL;
+    if (deflateInit2(&stream, 9, Z_DEFLATED, -15, 8,
+	    Z_DEFAULT_STRATEGY) != Z_OK) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"compression init error on \"%s\"", path));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DEFLATE_INIT", NULL);
+	Tcl_Close(interp, in);
+	return TCL_ERROR;
+    }
+    do {
+	len = Tcl_Read(in, buf, bufsize);
+	if (len == ERROR_LENGTH) {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "read error on %s: %s", path, Tcl_PosixError(interp)));
+	    deflateEnd(&stream);
+	    Tcl_Close(interp, in);
+	    return TCL_ERROR;
+	}
+	stream.avail_in = len;
+	stream.next_in = (unsigned char *) buf;
+	flush = Tcl_Eof(in) ? Z_FINISH : Z_NO_FLUSH;
+	do {
+	    stream.avail_out = sizeof(obuf);
+	    stream.next_out = (unsigned char *) obuf;
+	    len = deflate(&stream, flush);
+	    if (len == (size_t) Z_STREAM_ERROR) {
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"deflate error on %s", path));
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DEFLATE", NULL);
+		deflateEnd(&stream);
+		Tcl_Close(interp, in);
+		return TCL_ERROR;
+	    }
+	    olen = sizeof(obuf) - stream.avail_out;
+	    if (passwd) {
+		size_t i;
+		int tmp;
+
+		for (i = 0; i < olen; i++) {
+		    obuf[i] = (char) zencode(keys, crc32tab, obuf[i], tmp);
+		}
+	    }
+	    if (olen && ((size_t) Tcl_Write(out, obuf, olen) != olen)) {
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"write error: %s", Tcl_PosixError(interp)));
+		deflateEnd(&stream);
+		Tcl_Close(interp, in);
+		return TCL_ERROR;
+	    }
+	    nbytecompr += olen;
+	} while (stream.avail_out == 0);
+    } while (flush != Z_FINISH);
+    deflateEnd(&stream);
+    Tcl_Flush(out);
+    pos[1] = Tcl_Tell(out);
+    if (nbyte - nbytecompr <= 0) {
+	/*
+	 * Compressed file larger than input, write it again uncompressed.
+	 */
+	if (Tcl_Seek(in, 0, SEEK_SET) != 0) {
+	    goto seekErr;
+	}
+	if (Tcl_Seek(out, pos[2], SEEK_SET) != pos[2]) {
+	seekErr:
+	    Tcl_Close(interp, in);
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "seek error: %s", Tcl_PosixError(interp)));
+	    return TCL_ERROR;
+	}
+	nbytecompr = (passwd ? 12 : 0);
+	while (1) {
+	    len = Tcl_Read(in, buf, bufsize);
+	    if (len == ERROR_LENGTH) {
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"read error on \"%s\": %s",
+			path, Tcl_PosixError(interp)));
+		Tcl_Close(interp, in);
+		return TCL_ERROR;
+	    } else if (len == 0) {
+		break;
+	    }
+	    if (passwd) {
+		size_t i;
+		int tmp;
+
+		for (i = 0; i < len; i++) {
+		    buf[i] = (char) zencode(keys0, crc32tab, buf[i], tmp);
+		}
+	    }
+	    if ((size_t) Tcl_Write(out, buf, len) != len) {
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"write error: %s", Tcl_PosixError(interp)));
+		Tcl_Close(interp, in);
+		return TCL_ERROR;
+	    }
+	    nbytecompr += len;
+	}
+	compMeth = ZIP_COMPMETH_STORED;
+	Tcl_Flush(out);
+	pos[1] = Tcl_Tell(out);
+	Tcl_TruncateChannel(out, pos[1]);
+    }
+    Tcl_Close(interp, in);
+
+    hPtr = Tcl_CreateHashEntry(fileHash, zpath, &isNew);
+    if (!isNew) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"non-unique path name \"%s\"", path));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DUPLICATE_PATH", NULL);
+	return TCL_ERROR;
+    }
+
+    z = ckalloc(sizeof(ZipEntry));
+    Tcl_SetHashValue(hPtr, z);
+    z->name = NULL;
+    z->tnext = NULL;
+    z->depth = 0;
+    z->zipFilePtr = NULL;
+    z->isDirectory = 0;
+    z->isEncrypted = (passwd ? 1 : 0);
+    z->offset = pos[0];
+    z->crc32 = crc;
+    z->timestamp = mtime;
+    z->numBytes = nbyte;
+    z->numCompressedBytes = nbytecompr;
+    z->compressMethod = compMeth;
+    z->data = NULL;
+    z->name = Tcl_GetHashKey(fileHash, hPtr);
+    z->next = NULL;
+
+    /*
+     * Write final local header information.
+     */
+    ZipWriteInt(buf + ZIP_LOCAL_SIG_OFFS, ZIP_LOCAL_HEADER_SIG);
+    ZipWriteShort(buf + ZIP_LOCAL_VERSION_OFFS, ZIP_MIN_VERSION);
+    ZipWriteShort(buf + ZIP_LOCAL_FLAGS_OFFS, z->isEncrypted);
+    ZipWriteShort(buf + ZIP_LOCAL_COMPMETH_OFFS, z->compressMethod);
+    ZipWriteShort(buf + ZIP_LOCAL_MTIME_OFFS, ToDosTime(z->timestamp));
+    ZipWriteShort(buf + ZIP_LOCAL_MDATE_OFFS, ToDosDate(z->timestamp));
+    ZipWriteInt(buf + ZIP_LOCAL_CRC32_OFFS, z->crc32);
+    ZipWriteInt(buf + ZIP_LOCAL_COMPLEN_OFFS, z->numCompressedBytes);
+    ZipWriteInt(buf + ZIP_LOCAL_UNCOMPLEN_OFFS, z->numBytes);
+    ZipWriteShort(buf + ZIP_LOCAL_PATHLEN_OFFS, zpathlen);
+    ZipWriteShort(buf + ZIP_LOCAL_EXTRALEN_OFFS, align);
+    if (Tcl_Seek(out, pos[0], SEEK_SET) != pos[0]) {
+	Tcl_DeleteHashEntry(hPtr);
+	ckfree(z);
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"seek error: %s", Tcl_PosixError(interp)));
+	return TCL_ERROR;
+    }
+    if (Tcl_Write(out, buf, ZIP_LOCAL_HEADER_LEN) != ZIP_LOCAL_HEADER_LEN) {
+	Tcl_DeleteHashEntry(hPtr);
+	ckfree(z);
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"write error: %s", Tcl_PosixError(interp)));
+	return TCL_ERROR;
+    }
+    Tcl_Flush(out);
+    if (Tcl_Seek(out, pos[1], SEEK_SET) != pos[1]) {
+	Tcl_DeleteHashEntry(hPtr);
+	ckfree(z);
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"seek error: %s", Tcl_PosixError(interp)));
+	return TCL_ERROR;
+    }
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSMkZipOrImgObjCmd --
+ *
+ *	This procedure is creates a new ZIP archive file or image file given
+ *	output filename, input directory of files to be archived, optional
+ *	password, and optional image to be prepended to the output ZIP archive
+ *	file.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	A new ZIP archive file or image file is written.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSMkZipOrImgObjCmd(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int isImg,
+    int isList,
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    Tcl_Channel out;
+    int pwlen = 0, count, ret = TCL_ERROR, lobjc;
+    size_t len, slen = 0, i = 0;
+    Tcl_WideInt pos[3];
+    Tcl_Obj **lobjv, *list = NULL;
+    ZipEntry *z;
+    Tcl_HashEntry *hPtr;
+    Tcl_HashSearch search;
+    Tcl_HashTable fileHash;
+    char *strip = NULL, *pw = NULL, passBuf[264], buf[4096];
+
+    /*
+     * Caller has verified that the number of arguments is correct.
+     */
+
+    passBuf[0] = 0;
+    if (objc > (isList ? 3 : 4)) {
+	pw = Tcl_GetString(objv[isList ? 3 : 4]);
+	pwlen = strlen(pw);
+	if ((pwlen > 255) || strchr(pw, 0xff)) {
+	    Tcl_SetObjResult(interp,
+		    Tcl_NewStringObj("illegal password", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_PASS", NULL);
+	    return TCL_ERROR;
+	}
+    }
+    if (isList) {
+	list = objv[2];
+	Tcl_IncrRefCount(list);
+    } else {
+	Tcl_Obj *cmd[3];
+
+	cmd[1] = Tcl_NewStringObj("::tcl::zipfs::find", -1);
+	cmd[2] = objv[2];
+	cmd[0] = Tcl_NewListObj(2, cmd + 1);
+	Tcl_IncrRefCount(cmd[0]);
+	if (Tcl_EvalObjEx(interp, cmd[0], TCL_EVAL_DIRECT) != TCL_OK) {
+	    Tcl_DecrRefCount(cmd[0]);
+	    return TCL_ERROR;
+	}
+	Tcl_DecrRefCount(cmd[0]);
+	list = Tcl_GetObjResult(interp);
+	Tcl_IncrRefCount(list);
+    }
+    if (Tcl_ListObjGetElements(interp, list, &lobjc, &lobjv) != TCL_OK) {
+	Tcl_DecrRefCount(list);
+	return TCL_ERROR;
+    }
+    if (isList && (lobjc % 2)) {
+	Tcl_DecrRefCount(list);
+	Tcl_SetObjResult(interp,
+		Tcl_NewStringObj("need even number of elements", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "LIST_LENGTH", NULL);
+	return TCL_ERROR;
+    }
+    if (lobjc == 0) {
+	Tcl_DecrRefCount(list);
+	Tcl_SetObjResult(interp, Tcl_NewStringObj("empty archive", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "EMPTY", NULL);
+	return TCL_ERROR;
+    }
+    out = Tcl_OpenFileChannel(interp, Tcl_GetString(objv[1]), "wb", 0755);
+    if (out == NULL) {
+	Tcl_DecrRefCount(list);
+	return TCL_ERROR;
+    }
+    if (pwlen <= 0) {
+	pw = NULL;
+	pwlen = 0;
+    }
+    if (isImg) {
+	ZipFile *zf, zf0;
+	int isMounted = 0;
+	const char *imgName;
+
+	if (isList) {
+	    imgName = (objc > 4) ? Tcl_GetString(objv[4]) :
+		    Tcl_GetNameOfExecutable();
+	} else {
+	    imgName = (objc > 5) ? Tcl_GetString(objv[5]) :
+		    Tcl_GetNameOfExecutable();
+	}
+	if (pwlen) {
+	    i = 0;
+	    for (len = pwlen; len-- > 0;) {
+		int ch = pw[len];
+
+		passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f];
+		i++;
+	    }
+	    passBuf[i] = i;
+	    ++i;
+	    passBuf[i++] = (char) ZIP_PASSWORD_END_SIG;
+	    passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 8);
+	    passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 16);
+	    passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 24);
+	    passBuf[i] = '\0';
+	}
+
+	/*
+	 * Check for mounted image.
+	 */
+
+	WriteLock();
+	for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr;
+		hPtr = Tcl_NextHashEntry(&search)) {
+	    zf = Tcl_GetHashValue(hPtr);
+	    if (strcmp(zf->name, imgName) == 0) {
+		isMounted = 1;
+		zf->numOpen++;
+		break;
+	    }
+	}
+	Unlock();
+	if (!isMounted) {
+	    zf = &zf0;
+	}
+	if (isMounted || ZipFSOpenArchive(interp, imgName, 0, zf) == TCL_OK) {
+	    if ((size_t) Tcl_Write(out, (char *) zf->data,
+		    zf->passOffset) != zf->passOffset) {
+		memset(passBuf, 0, sizeof(passBuf));
+		Tcl_DecrRefCount(list);
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"write error: %s", Tcl_PosixError(interp)));
+		Tcl_Close(interp, out);
+		if (zf == &zf0) {
+		    ZipFSCloseArchive(interp, zf);
+		} else {
+		    WriteLock();
+		    zf->numOpen--;
+		    Unlock();
+		}
+		return TCL_ERROR;
+	    }
+	    if (zf == &zf0) {
+		ZipFSCloseArchive(interp, zf);
+	    } else {
+		WriteLock();
+		zf->numOpen--;
+		Unlock();
+	    }
+	} else {
+	    size_t k;
+	    int m, n;
+	    Tcl_Channel in;
+	    const char *errMsg = "seek error";
+
+	    /*
+	     * Fall back to read it as plain file which hopefully is a static
+	     * tclsh or wish binary with proper zipfs infrastructure built in.
+	     */
+
+	    Tcl_ResetResult(interp);
+	    in = Tcl_OpenFileChannel(interp, imgName, "rb", 0644);
+	    if (!in) {
+		memset(passBuf, 0, sizeof(passBuf));
+		Tcl_DecrRefCount(list);
+		Tcl_Close(interp, out);
+		return TCL_ERROR;
+	    }
+	    i = Tcl_Seek(in, 0, SEEK_END);
+	    if (i == ERROR_LENGTH) {
+	    cperr:
+		memset(passBuf, 0, sizeof(passBuf));
+		Tcl_DecrRefCount(list);
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"%s: %s", errMsg, Tcl_PosixError(interp)));
+		Tcl_Close(interp, out);
+		Tcl_Close(interp, in);
+		return TCL_ERROR;
+	    }
+	    Tcl_Seek(in, 0, SEEK_SET);
+	    for (k = 0; k < i; k += m) {
+		m = i - k;
+		if (m > (int) sizeof(buf)) {
+		    m = (int) sizeof(buf);
+		}
+		n = Tcl_Read(in, buf, m);
+		if (n == -1) {
+		    errMsg = "read error";
+		    goto cperr;
+		} else if (n == 0) {
+		    break;
+		}
+		m = Tcl_Write(out, buf, n);
+		if (m != n) {
+		    errMsg = "write error";
+		    goto cperr;
+		}
+	    }
+	    Tcl_Close(interp, in);
+	}
+	len = strlen(passBuf);
+	if (len > 0) {
+	    i = Tcl_Write(out, passBuf, len);
+	    if (i != len) {
+		Tcl_DecrRefCount(list);
+		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+			"write error: %s", Tcl_PosixError(interp)));
+		Tcl_Close(interp, out);
+		return TCL_ERROR;
+	    }
+	}
+	memset(passBuf, 0, sizeof(passBuf));
+	Tcl_Flush(out);
+    }
+    Tcl_InitHashTable(&fileHash, TCL_STRING_KEYS);
+    pos[0] = Tcl_Tell(out);
+    if (!isList && (objc > 3)) {
+	strip = Tcl_GetString(objv[3]);
+	slen = strlen(strip);
+    }
+    for (i = 0; i < (size_t) lobjc; i += (isList ? 2 : 1)) {
+	const char *path, *name;
+
+	path = Tcl_GetString(lobjv[i]);
+	if (isList) {
+	    name = Tcl_GetString(lobjv[i + 1]);
+	} else {
+	    name = path;
+	    if (slen > 0) {
+		len = strlen(name);
+		if ((len <= slen) || (strncmp(strip, name, slen) != 0)) {
+		    continue;
+		}
+		name += slen;
+	    }
+	}
+	while (name[0] == '/') {
+	    ++name;
+	}
+	if (name[0] == '\0') {
+	    continue;
+	}
+	if (ZipAddFile(interp, path, name, out, pw, buf, sizeof(buf),
+		&fileHash) != TCL_OK) {
+	    goto done;
+	}
+    }
+    pos[1] = Tcl_Tell(out);
+    count = 0;
+    for (i = 0; i < (size_t) lobjc; i += (isList ? 2 : 1)) {
+	const char *path, *name;
+
+	path = Tcl_GetString(lobjv[i]);
+	if (isList) {
+	    name = Tcl_GetString(lobjv[i + 1]);
+	} else {
+	    name = path;
+	    if (slen > 0) {
+		len = strlen(name);
+		if ((len <= slen) || (strncmp(strip, name, slen) != 0)) {
+		    continue;
+		}
+		name += slen;
+	    }
+	}
+	while (name[0] == '/') {
+	    ++name;
+	}
+	if (name[0] == '\0') {
+	    continue;
+	}
+	hPtr = Tcl_FindHashEntry(&fileHash, name);
+	if (!hPtr) {
+	    continue;
+	}
+	z = Tcl_GetHashValue(hPtr);
+	len = strlen(z->name);
+	ZipWriteInt(buf + ZIP_CENTRAL_SIG_OFFS, ZIP_CENTRAL_HEADER_SIG);
+	ZipWriteShort(buf + ZIP_CENTRAL_VERSIONMADE_OFFS, ZIP_MIN_VERSION);
+	ZipWriteShort(buf + ZIP_CENTRAL_VERSION_OFFS, ZIP_MIN_VERSION);
+	ZipWriteShort(buf + ZIP_CENTRAL_FLAGS_OFFS, z->isEncrypted);
+	ZipWriteShort(buf + ZIP_CENTRAL_COMPMETH_OFFS, z->compressMethod);
+	ZipWriteShort(buf + ZIP_CENTRAL_MTIME_OFFS, ToDosTime(z->timestamp));
+	ZipWriteShort(buf + ZIP_CENTRAL_MDATE_OFFS, ToDosDate(z->timestamp));
+	ZipWriteInt(buf + ZIP_CENTRAL_CRC32_OFFS, z->crc32);
+	ZipWriteInt(buf + ZIP_CENTRAL_COMPLEN_OFFS, z->numCompressedBytes);
+	ZipWriteInt(buf + ZIP_CENTRAL_UNCOMPLEN_OFFS, z->numBytes);
+	ZipWriteShort(buf + ZIP_CENTRAL_PATHLEN_OFFS, len);
+	ZipWriteShort(buf + ZIP_CENTRAL_EXTRALEN_OFFS, 0);
+	ZipWriteShort(buf + ZIP_CENTRAL_FCOMMENTLEN_OFFS, 0);
+	ZipWriteShort(buf + ZIP_CENTRAL_DISKFILE_OFFS, 0);
+	ZipWriteShort(buf + ZIP_CENTRAL_IATTR_OFFS, 0);
+	ZipWriteInt(buf + ZIP_CENTRAL_EATTR_OFFS, 0);
+	ZipWriteInt(buf + ZIP_CENTRAL_LOCALHDR_OFFS, z->offset - pos[0]);
+	if ((Tcl_Write(out, buf,
+		    ZIP_CENTRAL_HEADER_LEN) != ZIP_CENTRAL_HEADER_LEN)
+		|| ((size_t) Tcl_Write(out, z->name, len) != len)) {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "write error: %s", Tcl_PosixError(interp)));
+	    goto done;
+	}
+	count++;
+    }
+    Tcl_Flush(out);
+    pos[2] = Tcl_Tell(out);
+    ZipWriteInt(buf + ZIP_CENTRAL_END_SIG_OFFS, ZIP_CENTRAL_END_SIG);
+    ZipWriteShort(buf + ZIP_CENTRAL_DISKNO_OFFS, 0);
+    ZipWriteShort(buf + ZIP_CENTRAL_DISKDIR_OFFS, 0);
+    ZipWriteShort(buf + ZIP_CENTRAL_ENTS_OFFS, count);
+    ZipWriteShort(buf + ZIP_CENTRAL_TOTALENTS_OFFS, count);
+    ZipWriteInt(buf + ZIP_CENTRAL_DIRSIZE_OFFS, pos[2] - pos[1]);
+    ZipWriteInt(buf + ZIP_CENTRAL_DIRSTART_OFFS, pos[1] - pos[0]);
+    ZipWriteShort(buf + ZIP_CENTRAL_COMMENTLEN_OFFS, 0);
+    if (Tcl_Write(out, buf, ZIP_CENTRAL_END_LEN) != ZIP_CENTRAL_END_LEN) {
+	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"write error: %s", Tcl_PosixError(interp)));
+	goto done;
+    }
+    Tcl_Flush(out);
+    ret = TCL_OK;
+
+  done:
+    if (ret == TCL_OK) {
+	ret = Tcl_Close(interp, out);
+    } else {
+	Tcl_Close(interp, out);
+    }
+    Tcl_DecrRefCount(list);
+    for (hPtr = Tcl_FirstHashEntry(&fileHash, &search); hPtr;
+	    hPtr = Tcl_NextHashEntry(&search)) {
+	z = Tcl_GetHashValue(hPtr);
+	ckfree(z);
+	Tcl_DeleteHashEntry(hPtr);
+    }
+    Tcl_DeleteHashTable(&fileHash);
+    return ret;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSMkZipObjCmd, ZipFSLMkZipObjCmd --
+ *
+ *	These procedures are invoked to process the [zipfs mkzip] and [zipfs
+ *	lmkzip] commands.  See description of ZipFSMkZipOrImgCmd().
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	See description of ZipFSMkZipOrImgCmd().
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSMkZipObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    if (objc < 3 || objc > 5) {
+	Tcl_WrongNumArgs(interp, 1, objv, "outfile indir ?strip? ?password?");
+	return TCL_ERROR;
+    }
+    if (Tcl_IsSafe(interp)) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"operation not permitted in a safe interpreter", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL);
+	return TCL_ERROR;
+    }
+    return ZipFSMkZipOrImgObjCmd(interp, 0, 0, objc, objv);
+}
+
+static int
+ZipFSLMkZipObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    if (objc < 3 || objc > 4) {
+	Tcl_WrongNumArgs(interp, 1, objv, "outfile inlist ?password?");
+	return TCL_ERROR;
+    }
+    if (Tcl_IsSafe(interp)) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"operation not permitted in a safe interpreter", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL);
+	return TCL_ERROR;
+    }
+    return ZipFSMkZipOrImgObjCmd(interp, 0, 1, objc, objv);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSMkImgObjCmd, ZipFSLMkImgObjCmd --
+ *
+ *	These procedures are invoked to process the [zipfs mkimg] and [zipfs
+ *	lmkimg] commands.  See description of ZipFSMkZipOrImgCmd().
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	See description of ZipFSMkZipOrImgCmd().
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSMkImgObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    if (objc < 3 || objc > 6) {
+	Tcl_WrongNumArgs(interp, 1, objv,
+		"outfile indir ?strip? ?password? ?infile?");
+	return TCL_ERROR;
+    }
+    if (Tcl_IsSafe(interp)) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"operation not permitted in a safe interpreter", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL);
+	return TCL_ERROR;
+    }
+    return ZipFSMkZipOrImgObjCmd(interp, 1, 0, objc, objv);
+}
+
+static int
+ZipFSLMkImgObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    if (objc < 3 || objc > 5) {
+	Tcl_WrongNumArgs(interp, 1, objv, "outfile inlist ?password infile?");
+	return TCL_ERROR;
+    }
+    if (Tcl_IsSafe(interp)) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj(
+		"operation not permitted in a safe interpreter", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL);
+	return TCL_ERROR;
+    }
+    return ZipFSMkZipOrImgObjCmd(interp, 1, 1, objc, objv);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSCanonicalObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs canonical] command.
+ *	It returns the canonical name for a file within zipfs
+ *
+ * Results:
+ *	Always TCL_OK provided the right number of arguments are supplied.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSCanonicalObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    char *mntpoint = NULL;
+    char *filename = NULL;
+    char *result;
+    Tcl_DString dPath;
+
+    if (objc < 2 || objc > 4) {
+	Tcl_WrongNumArgs(interp, 1, objv, "?mountpoint? filename ?inZipfs?");
+	return TCL_ERROR;
+    }
+    Tcl_DStringInit(&dPath);
+    if (objc == 2) {
+	filename = Tcl_GetString(objv[1]);
+	result = CanonicalPath("", filename, &dPath, 1);
+    } else if (objc == 3) {
+	mntpoint = Tcl_GetString(objv[1]);
+	filename = Tcl_GetString(objv[2]);
+	result = CanonicalPath(mntpoint, filename, &dPath, 1);
+    } else {
+	int zipfs = 0;
+
+	if (Tcl_GetBooleanFromObj(interp, objv[3], &zipfs)) {
+	    return TCL_ERROR;
+	}
+	mntpoint = Tcl_GetString(objv[1]);
+	filename = Tcl_GetString(objv[2]);
+	result = CanonicalPath(mntpoint, filename, &dPath, zipfs);
+    }
+    Tcl_SetObjResult(interp, Tcl_NewStringObj(result, -1));
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSExistsObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs exists] command.  It
+ *	tests for the existence of a file in the ZIP filesystem and places a
+ *	boolean into the interp's result.
+ *
+ * Results:
+ *	Always TCL_OK provided the right number of arguments are supplied.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSExistsObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    char *filename;
+    int exists;
+    Tcl_DString ds;
+
+    if (objc != 2) {
+	Tcl_WrongNumArgs(interp, 1, objv, "filename");
+	return TCL_ERROR;
+    }
+
+    /*
+     * Prepend ZIPFS_VOLUME to filename, eliding the final /
+     */
+
+    filename = Tcl_GetString(objv[1]);
+    Tcl_DStringInit(&ds);
+    Tcl_DStringAppend(&ds, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN - 1);
+    Tcl_DStringAppend(&ds, filename, -1);
+    filename = Tcl_DStringValue(&ds);
+
+    ReadLock();
+    exists = ZipFSLookup(filename) != NULL;
+    Unlock();
+
+    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(exists));
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSInfoObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs info] command.	 On
+ *	success, it returns a Tcl list made up of name of ZIP archive file,
+ *	size uncompressed, size compressed, and archive offset of a file in
+ *	the ZIP filesystem.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSInfoObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    char *filename;
+    ZipEntry *z;
+
+    if (objc != 2) {
+	Tcl_WrongNumArgs(interp, 1, objv, "filename");
+	return TCL_ERROR;
+    }
+    filename = Tcl_GetString(objv[1]);
+    ReadLock();
+    z = ZipFSLookup(filename);
+    if (z) {
+	Tcl_Obj *result = Tcl_GetObjResult(interp);
+
+	Tcl_ListObjAppendElement(interp, result,
+		Tcl_NewStringObj(z->zipFilePtr->name, -1));
+	Tcl_ListObjAppendElement(interp, result,
+		Tcl_NewWideIntObj(z->numBytes));
+	Tcl_ListObjAppendElement(interp, result,
+		Tcl_NewWideIntObj(z->numCompressedBytes));
+	Tcl_ListObjAppendElement(interp, result, Tcl_NewWideIntObj(z->offset));
+    }
+    Unlock();
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSListObjCmd --
+ *
+ *	This procedure is invoked to process the [zipfs list] command.	 On
+ *	success, it returns a Tcl list of files of the ZIP filesystem which
+ *	match a search pattern (glob or regexp).
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSListObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    char *pattern = NULL;
+    Tcl_RegExp regexp = NULL;
+    Tcl_HashEntry *hPtr;
+    Tcl_HashSearch search;
+    Tcl_Obj *result = Tcl_GetObjResult(interp);
+
+    if (objc > 3) {
+	Tcl_WrongNumArgs(interp, 1, objv, "?(-glob|-regexp)? ?pattern?");
+	return TCL_ERROR;
+    }
+    if (objc == 3) {
+	int n;
+	char *what = Tcl_GetStringFromObj(objv[1], &n);
+
+	if ((n >= 2) && (strncmp(what, "-glob", n) == 0)) {
+	    pattern = Tcl_GetString(objv[2]);
+	} else if ((n >= 2) && (strncmp(what, "-regexp", n) == 0)) {
+	    regexp = Tcl_RegExpCompile(interp, Tcl_GetString(objv[2]));
+	    if (!regexp) {
+		return TCL_ERROR;
+	    }
+	} else {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "unknown option \"%s\"", what));
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_OPT", NULL);
+	    return TCL_ERROR;
+	}
+    } else if (objc == 2) {
+	pattern = Tcl_GetString(objv[1]);
+    }
+    ReadLock();
+    if (pattern) {
+	for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search);
+		hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
+	    ZipEntry *z = Tcl_GetHashValue(hPtr);
+
+	    if (Tcl_StringMatch(z->name, pattern)) {
+		Tcl_ListObjAppendElement(interp, result,
+			Tcl_NewStringObj(z->name, -1));
+	    }
+	}
+    } else if (regexp) {
+	for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search);
+		hPtr; hPtr = Tcl_NextHashEntry(&search)) {
+	    ZipEntry *z = Tcl_GetHashValue(hPtr);
+
+	    if (Tcl_RegExpExec(interp, regexp, z->name, z->name)) {
+		Tcl_ListObjAppendElement(interp, result,
+			Tcl_NewStringObj(z->name, -1));
+	    }
+	}
+    } else {
+	for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search);
+		hPtr; hPtr = Tcl_NextHashEntry(&search)) {
+	    ZipEntry *z = Tcl_GetHashValue(hPtr);
+
+	    Tcl_ListObjAppendElement(interp, result,
+		    Tcl_NewStringObj(z->name, -1));
+	}
+    }
+    Unlock();
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * TclZipfs_TclLibrary --
+ *
+ *	This procedure gets (and possibly finds) the root that Tcl's library
+ *	files are mounted under.
+ *
+ * Results:
+ *	A Tcl object holding the location (with zero refcount), or NULL if no
+ *	Tcl library can be found.
+ *
+ * Side effects:
+ *	May initialise the cache of where such library files are to be found.
+ *	This cache is never cleared.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifdef _WIN32
+#define LIBRARY_SIZE	    64
+
+static inline int
+WCharToUtf(
+    const WCHAR *wSrc,
+    char *dst)
+{
+    char *start = dst;
+
+    while (*wSrc != '\0') {
+	dst += Tcl_UniCharToUtf(*wSrc, dst);
+	wSrc++;
+    }
+    *dst = '\0';
+    return (int) (dst - start);
+}
+#endif /* _WIN32 */
+
+Tcl_Obj *
+TclZipfs_TclLibrary(void)
+{
+    Tcl_Obj *vfsInitScript;
+    int found;
+#ifdef _WIN32
+    HMODULE hModule;
+    WCHAR wName[MAX_PATH + LIBRARY_SIZE];
+    char dllName[(MAX_PATH + LIBRARY_SIZE) * TCL_UTF_MAX];
+#endif /* _WIN32 */
+
+    /*
+     * Use the cached value if that has been set; we don't want to repeat the
+     * searching and mounting.
+     */
+
+    if (zipfs_literal_tcl_library) {
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+
+    /*
+     * Look for the library file system within the executable.
+     */
+
+    vfsInitScript = Tcl_NewStringObj(ZIPFS_APP_MOUNT "/tcl_library/init.tcl",
+	    -1);
+    Tcl_IncrRefCount(vfsInitScript);
+    found = Tcl_FSAccess(vfsInitScript, F_OK);
+    Tcl_DecrRefCount(vfsInitScript);
+    if (found == TCL_OK) {
+	zipfs_literal_tcl_library = ZIPFS_APP_MOUNT "/tcl_library";
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+
+    /*
+     * Look for the library file system within the DLL/shared library.  Note
+     * that we must mount the zip file and dll before releasing to search.
+     */
+
+#if defined(_WIN32)
+    hModule = TclWinGetTclInstance();
+    if (GetModuleFileNameW(hModule, wName, MAX_PATH) == 0) {
+	GetModuleFileNameA(hModule, dllName, MAX_PATH);
+    } else {
+	WCharToUtf(wName, dllName);
+    }
+
+    if (ZipfsAppHookFindTclInit(dllName) == TCL_OK) {
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+#elif /* !_WIN32 && */ defined(CFG_RUNTIME_DLLFILE)
+    if (ZipfsAppHookFindTclInit(
+	    CFG_RUNTIME_LIBDIR "/" CFG_RUNTIME_DLLFILE) == TCL_OK) {
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+#endif /* _WIN32 || CFG_RUNTIME_DLLFILE */
+
+    /*
+     * If we're configured to know about a ZIP archive we should use, do that.
+     */
+
+#ifdef CFG_RUNTIME_ZIPFILE
+    if (ZipfsAppHookFindTclInit(
+	    CFG_RUNTIME_LIBDIR "/" CFG_RUNTIME_ZIPFILE) == TCL_OK) {
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+    if (ZipfsAppHookFindTclInit(
+	    CFG_RUNTIME_SCRDIR "/" CFG_RUNTIME_ZIPFILE) == TCL_OK) {
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+    if (ZipfsAppHookFindTclInit(CFG_RUNTIME_ZIPFILE) == TCL_OK) {
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+#endif /* CFG_RUNTIME_ZIPFILE */
+
+    /*
+     * If anything set the cache (but subsequently failed) go with that
+     * anyway.
+     */
+
+    if (zipfs_literal_tcl_library) {
+	return Tcl_NewStringObj(zipfs_literal_tcl_library, -1);
+    }
+    return NULL;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSTclLibraryObjCmd --
+ *
+ *	This procedure is invoked to process the
+ *	[::tcl::zipfs::tcl_library_init] command, usually called during the
+ *	execution of Tcl's interpreter startup. It returns the root that Tcl's
+ *	library files are mounted under.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	May initialise the cache of where such library files are to be found.
+ *	This cache is never cleared.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSTclLibraryObjCmd(
+    ClientData clientData,	/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    if (!Tcl_IsSafe(interp)) {
+	Tcl_Obj *pResult = TclZipfs_TclLibrary();
+
+	if (!pResult) {
+	    pResult = Tcl_NewObj();
+	}
+	Tcl_SetObjResult(interp, pResult);
+    }
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipChannelClose --
+ *
+ *	This function is called to close a channel.
+ *
+ * Results:
+ *	Always TCL_OK.
+ *
+ * Side effects:
+ *	Resources are free'd.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipChannelClose(
+    ClientData instanceData,
+    Tcl_Interp *interp)		/* Current interpreter. */
+{
+    ZipChannel *info = instanceData;
+
+    if (info->iscompr && info->ubuf) {
+	ckfree(info->ubuf);
+	info->ubuf = NULL;
+    }
+    if (info->isEncrypted) {
+	info->isEncrypted = 0;
+	memset(info->keys, 0, sizeof(info->keys));
+    }
+    if (info->isWriting) {
+	ZipEntry *z = info->zipEntryPtr;
+	unsigned char *newdata = attemptckrealloc(info->ubuf, info->numRead);
+
+	if (newdata) {
+	    if (z->data) {
+		ckfree(z->data);
+	    }
+	    z->data = newdata;
+	    z->numBytes = z->numCompressedBytes = info->numBytes;
+	    z->compressMethod = ZIP_COMPMETH_STORED;
+	    z->timestamp = time(NULL);
+	    z->isDirectory = 0;
+	    z->isEncrypted = 0;
+	    z->offset = 0;
+	    z->crc32 = 0;
+	} else {
+	    ckfree(info->ubuf);
+	}
+    }
+    WriteLock();
+    info->zipFilePtr->numOpen--;
+    Unlock();
+    ckfree(info);
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipChannelRead --
+ *
+ *	This function is called to read data from channel.
+ *
+ * Results:
+ *	Number of bytes read or -1 on error with error number set.
+ *
+ * Side effects:
+ *	Data is read and file pointer is advanced.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipChannelRead(
+    ClientData instanceData,
+    char *buf,
+    int toRead,
+    int *errloc)
+{
+    ZipChannel *info = (ZipChannel *) instanceData;
+    unsigned long nextpos;
+
+    if (info->isDirectory < 0) {
+	/*
+	 * Special case: when executable combined with ZIP archive file read
+	 * data in front of ZIP, i.e. the executable itself.
+	 */
+
+	nextpos = info->numRead + toRead;
+	if (nextpos > info->zipFilePtr->baseOffset) {
+	    toRead = info->zipFilePtr->baseOffset - info->numRead;
+	    nextpos = info->zipFilePtr->baseOffset;
+	}
+	if (toRead == 0) {
+	    return 0;
+	}
+	memcpy(buf, info->zipFilePtr->data, toRead);
+	info->numRead = nextpos;
+	*errloc = 0;
+	return toRead;
+    }
+    if (info->isDirectory) {
+	*errloc = EISDIR;
+	return -1;
+    }
+    nextpos = info->numRead + toRead;
+    if (nextpos > info->numBytes) {
+	toRead = info->numBytes - info->numRead;
+	nextpos = info->numBytes;
+    }
+    if (toRead == 0) {
+	return 0;
+    }
+    if (info->isEncrypted) {
+	int i;
+
+	for (i = 0; i < toRead; i++) {
+	    int ch = info->ubuf[i + info->numRead];
+
+	    buf[i] = zdecode(info->keys, crc32tab, ch);
+	}
+    } else {
+	memcpy(buf, info->ubuf + info->numRead, toRead);
+    }
+    info->numRead = nextpos;
+    *errloc = 0;
+    return toRead;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipChannelWrite --
+ *
+ *	This function is called to write data into channel.
+ *
+ * Results:
+ *	Number of bytes written or -1 on error with error number set.
+ *
+ * Side effects:
+ *	Data is written and file pointer is advanced.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipChannelWrite(
+    ClientData instanceData,
+    const char *buf,
+    int toWrite,
+    int *errloc)
+{
+    ZipChannel *info = (ZipChannel *) instanceData;
+    unsigned long nextpos;
+
+    if (!info->isWriting) {
+	*errloc = EINVAL;
+	return -1;
+    }
+    nextpos = info->numRead + toWrite;
+    if (nextpos > info->maxWrite) {
+	toWrite = info->maxWrite - info->numRead;
+	nextpos = info->maxWrite;
+    }
+    if (toWrite == 0) {
+	return 0;
+    }
+    memcpy(info->ubuf + info->numRead, buf, toWrite);
+    info->numRead = nextpos;
+    if (info->numRead > info->numBytes) {
+	info->numBytes = info->numRead;
+    }
+    *errloc = 0;
+    return toWrite;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipChannelSeek --
+ *
+ *	This function is called to position file pointer of channel.
+ *
+ * Results:
+ *	New file position or -1 on error with error number set.
+ *
+ * Side effects:
+ *	File pointer is repositioned according to offset and mode.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipChannelSeek(
+    ClientData instanceData,
+    long offset,
+    int mode,
+    int *errloc)
+{
+    ZipChannel *info = (ZipChannel *) instanceData;
+    unsigned long end;
+
+    if (!info->isWriting && (info->isDirectory < 0)) {
+	/*
+	 * Special case: when executable combined with ZIP archive file, seek
+	 * within front of ZIP, i.e. the executable itself.
+	 */
+	end = info->zipFilePtr->baseOffset;
+    } else if (info->isDirectory) {
+	*errloc = EINVAL;
+	return -1;
+    } else {
+	end = info->numBytes;
+    }
+    switch (mode) {
+    case SEEK_CUR:
+	offset += info->numRead;
+	break;
+    case SEEK_END:
+	offset += end;
+	break;
+    case SEEK_SET:
+	break;
+    default:
+	*errloc = EINVAL;
+	return -1;
+    }
+    if (offset < 0) {
+	*errloc = EINVAL;
+	return -1;
+    }
+    if (info->isWriting) {
+	if ((unsigned long) offset > info->maxWrite) {
+	    *errloc = EINVAL;
+	    return -1;
+	}
+	if ((unsigned long) offset > info->numBytes) {
+	    info->numBytes = offset;
+	}
+    } else if ((unsigned long) offset > end) {
+	*errloc = EINVAL;
+	return -1;
+    }
+    info->numRead = (unsigned long) offset;
+    return info->numRead;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipChannelWatchChannel --
+ *
+ *	This function is called for event notifications on channel. Does
+ *	nothing.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static void
+ZipChannelWatchChannel(
+    ClientData instanceData,
+    int mask)
+{
+    return;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipChannelGetFile --
+ *
+ *	This function is called to retrieve OS handle for channel.
+ *
+ * Results:
+ *	Always TCL_ERROR since there's never an OS handle for a file within a
+ *	ZIP archive.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipChannelGetFile(
+    ClientData instanceData,
+    int direction,
+    ClientData *handlePtr)
+{
+    return TCL_ERROR;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipChannelOpen --
+ *
+ *	This function opens a Tcl_Channel on a file from a mounted ZIP archive
+ *	according to given open mode.
+ *
+ * Results:
+ *	Tcl_Channel on success, or NULL on error.
+ *
+ * Side effects:
+ *	Memory is allocated, the file from the ZIP archive is uncompressed.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static Tcl_Channel
+ZipChannelOpen(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    char *filename,
+    int mode,
+    int permissions)
+{
+    ZipEntry *z;
+    ZipChannel *info;
+    int i, ch, trunc, wr, flags = 0;
+    char cname[128];
+
+    if ((mode & O_APPEND)
+	    || ((ZipFS.wrmax <= 0) && (mode & (O_WRONLY | O_RDWR)))) {
+	if (interp) {
+	    Tcl_SetObjResult(interp,
+		    Tcl_NewStringObj("unsupported open mode", -1));
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_MODE", NULL);
+	}
+	return NULL;
+    }
+    WriteLock();
+    z = ZipFSLookup(filename);
+    if (!z) {
+	Tcl_SetErrno(ENOENT);
+	if (interp) {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "file not found \"%s\": %s", filename,
+		    Tcl_PosixError(interp)));
+	}
+	goto error;
+    }
+    trunc = (mode & O_TRUNC) != 0;
+    wr = (mode & (O_WRONLY | O_RDWR)) != 0;
+    if ((z->compressMethod != ZIP_COMPMETH_STORED)
+	    && (z->compressMethod != ZIP_COMPMETH_DEFLATED)) {
+	ZIPFS_ERROR(interp, "unsupported compression method");
+	if (interp) {
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "COMP_METHOD", NULL);
+	}
+	goto error;
+    }
+    if (wr && z->isDirectory) {
+	ZIPFS_ERROR(interp, "unsupported file type");
+	if (interp) {
+	    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "FILE_TYPE", NULL);
+	}
+	goto error;
+    }
+    if (!trunc) {
+	flags |= TCL_READABLE;
+	if (z->isEncrypted && (z->zipFilePtr->passBuf[0] == 0)) {
+	    ZIPFS_ERROR(interp, "decryption failed");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DECRYPT", NULL);
+	    }
+	    goto error;
+	} else if (wr && !z->data && (z->numBytes > ZipFS.wrmax)) {
+	    ZIPFS_ERROR(interp, "file too large");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "FILE_SIZE", NULL);
+	    }
+	    goto error;
+	}
+    } else {
+	flags = TCL_WRITABLE;
+    }
+    info = attemptckalloc(sizeof(ZipChannel));
+    if (!info) {
+	ZIPFS_ERROR(interp, "out of memory");
+	if (interp) {
+	    Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+	}
+	goto error;
+    }
+    info->zipFilePtr = z->zipFilePtr;
+    info->zipEntryPtr = z;
+    info->numRead = 0;
+    if (wr) {
+	flags |= TCL_WRITABLE;
+	info->isWriting = 1;
+	info->isDirectory = 0;
+	info->maxWrite = ZipFS.wrmax;
+	info->iscompr = 0;
+	info->isEncrypted = 0;
+	info->ubuf = attemptckalloc(info->maxWrite);
+	if (!info->ubuf) {
+	merror0:
+	    if (info->ubuf) {
+		ckfree(info->ubuf);
+	    }
+	    ckfree(info);
+	    ZIPFS_ERROR(interp, "out of memory");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+	    }
+	    goto error;
+	}
+	memset(info->ubuf, 0, info->maxWrite);
+	if (trunc) {
+	    info->numBytes = 0;
+	} else if (z->data) {
+	    unsigned int j = z->numBytes;
+
+	    if (j > info->maxWrite) {
+		j = info->maxWrite;
+	    }
+	    memcpy(info->ubuf, z->data, j);
+	    info->numBytes = j;
+	} else {
+	    unsigned char *zbuf = z->zipFilePtr->data + z->offset;
+
+	    if (z->isEncrypted) {
+		int len = z->zipFilePtr->passBuf[0];
+		char passBuf[260];
+
+		for (i = 0; i < len; i++) {
+		    ch = z->zipFilePtr->passBuf[len - i];
+		    passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f];
+		}
+		passBuf[i] = '\0';
+		init_keys(passBuf, info->keys, crc32tab);
+		memset(passBuf, 0, sizeof(passBuf));
+		for (i = 0; i < 12; i++) {
+		    ch = info->ubuf[i];
+		    zdecode(info->keys, crc32tab, ch);
+		}
+		zbuf += i;
+	    }
+	    if (z->compressMethod == ZIP_COMPMETH_DEFLATED) {
+		z_stream stream;
+		int err;
+		unsigned char *cbuf = NULL;
+
+		memset(&stream, 0, sizeof(z_stream));
+		stream.zalloc = Z_NULL;
+		stream.zfree = Z_NULL;
+		stream.opaque = Z_NULL;
+		stream.avail_in = z->numCompressedBytes;
+		if (z->isEncrypted) {
+		    unsigned int j;
+
+		    stream.avail_in -= 12;
+		    cbuf = attemptckalloc(stream.avail_in);
+		    if (!cbuf) {
+			goto merror0;
+		    }
+		    for (j = 0; j < stream.avail_in; j++) {
+			ch = info->ubuf[j];
+			cbuf[j] = zdecode(info->keys, crc32tab, ch);
+		    }
+		    stream.next_in = cbuf;
+		} else {
+		    stream.next_in = zbuf;
+		}
+		stream.next_out = info->ubuf;
+		stream.avail_out = info->maxWrite;
+		if (inflateInit2(&stream, -15) != Z_OK) {
+		    goto cerror0;
+		}
+		err = inflate(&stream, Z_SYNC_FLUSH);
+		inflateEnd(&stream);
+		if ((err == Z_STREAM_END)
+			|| ((err == Z_OK) && (stream.avail_in == 0))) {
+		    if (cbuf) {
+			memset(info->keys, 0, sizeof(info->keys));
+			ckfree(cbuf);
+		    }
+		    goto wrapchan;
+		}
+	    cerror0:
+		if (cbuf) {
+		    memset(info->keys, 0, sizeof(info->keys));
+		    ckfree(cbuf);
+		}
+		if (info->ubuf) {
+		    ckfree(info->ubuf);
+		}
+		ckfree(info);
+		ZIPFS_ERROR(interp, "decompression error");
+		if (interp) {
+		    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "CORRUPT", NULL);
+		}
+		goto error;
+	    } else if (z->isEncrypted) {
+		for (i = 0; i < z->numBytes - 12; i++) {
+		    ch = zbuf[i];
+		    info->ubuf[i] = zdecode(info->keys, crc32tab, ch);
+		}
+	    } else {
+		memcpy(info->ubuf, zbuf, z->numBytes);
+	    }
+	    memset(info->keys, 0, sizeof(info->keys));
+	    goto wrapchan;
+	}
+    } else if (z->data) {
+	flags |= TCL_READABLE;
+	info->isWriting = 0;
+	info->iscompr = 0;
+	info->isDirectory = 0;
+	info->isEncrypted = 0;
+	info->numBytes = z->numBytes;
+	info->maxWrite = 0;
+	info->ubuf = z->data;
+    } else {
+	flags |= TCL_READABLE;
+	info->isWriting = 0;
+	info->iscompr = (z->compressMethod == ZIP_COMPMETH_DEFLATED);
+	info->ubuf = z->zipFilePtr->data + z->offset;
+	info->isDirectory = z->isDirectory;
+	info->isEncrypted = z->isEncrypted;
+	info->numBytes = z->numBytes;
+	info->maxWrite = 0;
+	if (info->isEncrypted) {
+	    int len = z->zipFilePtr->passBuf[0];
+	    char passBuf[260];
+
+	    for (i = 0; i < len; i++) {
+		ch = z->zipFilePtr->passBuf[len - i];
+		passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f];
+	    }
+	    passBuf[i] = '\0';
+	    init_keys(passBuf, info->keys, crc32tab);
+	    memset(passBuf, 0, sizeof(passBuf));
+	    for (i = 0; i < 12; i++) {
+		ch = info->ubuf[i];
+		zdecode(info->keys, crc32tab, ch);
+	    }
+	    info->ubuf += i;
+	}
+	if (info->iscompr) {
+	    z_stream stream;
+	    int err;
+	    unsigned char *ubuf = NULL;
+	    unsigned int j;
+
+	    memset(&stream, 0, sizeof(z_stream));
+	    stream.zalloc = Z_NULL;
+	    stream.zfree = Z_NULL;
+	    stream.opaque = Z_NULL;
+	    stream.avail_in = z->numCompressedBytes;
+	    if (info->isEncrypted) {
+		stream.avail_in -= 12;
+		ubuf = attemptckalloc(stream.avail_in);
+		if (!ubuf) {
+		    info->ubuf = NULL;
+		    goto merror;
+		}
+		for (j = 0; j < stream.avail_in; j++) {
+		    ch = info->ubuf[j];
+		    ubuf[j] = zdecode(info->keys, crc32tab, ch);
+		}
+		stream.next_in = ubuf;
+	    } else {
+		stream.next_in = info->ubuf;
+	    }
+	    stream.next_out = info->ubuf = attemptckalloc(info->numBytes);
+	    if (!info->ubuf) {
+	    merror:
+		if (ubuf) {
+		    info->isEncrypted = 0;
+		    memset(info->keys, 0, sizeof(info->keys));
+		    ckfree(ubuf);
+		}
+		ckfree(info);
+		if (interp) {
+		    Tcl_SetObjResult(interp,
+			    Tcl_NewStringObj("out of memory", -1));
+		    Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL);
+		}
+		goto error;
+	    }
+	    stream.avail_out = info->numBytes;
+	    if (inflateInit2(&stream, -15) != Z_OK) {
+		goto cerror;
+	    }
+	    err = inflate(&stream, Z_SYNC_FLUSH);
+	    inflateEnd(&stream);
+	    if ((err == Z_STREAM_END)
+		    || ((err == Z_OK) && (stream.avail_in == 0))) {
+		if (ubuf) {
+		    info->isEncrypted = 0;
+		    memset(info->keys, 0, sizeof(info->keys));
+		    ckfree(ubuf);
+		}
+		goto wrapchan;
+	    }
+	cerror:
+	    if (ubuf) {
+		info->isEncrypted = 0;
+		memset(info->keys, 0, sizeof(info->keys));
+		ckfree(ubuf);
+	    }
+	    if (info->ubuf) {
+		ckfree(info->ubuf);
+	    }
+	    ckfree(info);
+	    ZIPFS_ERROR(interp, "decompression error");
+	    if (interp) {
+		Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "CORRUPT", NULL);
+	    }
+	    goto error;
+	}
+    }
+
+  wrapchan:
+    sprintf(cname, "zipfs_%" TCL_LL_MODIFIER "x_%d", z->offset,
+	    ZipFS.idCount++);
+    z->zipFilePtr->numOpen++;
+    Unlock();
+    return Tcl_CreateChannel(&ZipChannelType, cname, info, flags);
+
+  error:
+    Unlock();
+    return NULL;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipEntryStat --
+ *
+ *	This function implements the ZIP filesystem specific version of the
+ *	library version of stat.
+ *
+ * Results:
+ *	See stat documentation.
+ *
+ * Side effects:
+ *	See stat documentation.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipEntryStat(
+    char *path,
+    Tcl_StatBuf *buf)
+{
+    ZipEntry *z;
+    int ret = -1;
+
+    ReadLock();
+    z = ZipFSLookup(path);
+    if (z) {
+	memset(buf, 0, sizeof(Tcl_StatBuf));
+	if (z->isDirectory) {
+	    buf->st_mode = S_IFDIR | 0555;
+	} else {
+	    buf->st_mode = S_IFREG | 0555;
+	}
+	buf->st_size = z->numBytes;
+	buf->st_mtime = z->timestamp;
+	buf->st_ctime = z->timestamp;
+	buf->st_atime = z->timestamp;
+	ret = 0;
+    }
+    Unlock();
+    return ret;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipEntryAccess --
+ *
+ *	This function implements the ZIP filesystem specific version of the
+ *	library version of access.
+ *
+ * Results:
+ *	See access documentation.
+ *
+ * Side effects:
+ *	See access documentation.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipEntryAccess(
+    char *path,
+    int mode)
+{
+    ZipEntry *z;
+
+    if (mode & 3) {
+	return -1;
+    }
+    ReadLock();
+    z = ZipFSLookup(path);
+    Unlock();
+    return (z ? 0 : -1);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSOpenFileChannelProc --
+ *
+ * Results:
+ *
+ * Side effects:
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static Tcl_Channel
+ZipFSOpenFileChannelProc(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    Tcl_Obj *pathPtr,
+    int mode,
+    int permissions)
+{
+    int len;
+
+    pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr);
+    if (!pathPtr) {
+	return NULL;
+    }
+    return ZipChannelOpen(interp, Tcl_GetStringFromObj(pathPtr, &len), mode,
+	    permissions);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSStatProc --
+ *
+ *	This function implements the ZIP filesystem specific version of the
+ *	library version of stat.
+ *
+ * Results:
+ *	See stat documentation.
+ *
+ * Side effects:
+ *	See stat documentation.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSStatProc(
+    Tcl_Obj *pathPtr,
+    Tcl_StatBuf *buf)
+{
+    int len;
+
+    pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr);
+    if (!pathPtr) {
+	return -1;
+    }
+    return ZipEntryStat(Tcl_GetStringFromObj(pathPtr, &len), buf);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSAccessProc --
+ *
+ *	This function implements the ZIP filesystem specific version of the
+ *	library version of access.
+ *
+ * Results:
+ *	See access documentation.
+ *
+ * Side effects:
+ *	See access documentation.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSAccessProc(
+    Tcl_Obj *pathPtr,
+    int mode)
+{
+    int len;
+
+    pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr);
+    if (!pathPtr) {
+	return -1;
+    }
+    return ZipEntryAccess(Tcl_GetStringFromObj(pathPtr, &len), mode);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSFilesystemSeparatorProc --
+ *
+ *	This function returns the separator to be used for a given path. The
+ *	object returned should have a refCount of zero
+ *
+ * Results:
+ *	A Tcl object, with a refCount of zero. If the caller needs to retain a
+ *	reference to the object, it should call Tcl_IncrRefCount, and should
+ *	otherwise free the object.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static Tcl_Obj *
+ZipFSFilesystemSeparatorProc(
+    Tcl_Obj *pathPtr)
+{
+    return Tcl_NewStringObj("/", -1);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSMatchInDirectoryProc --
+ *
+ *	This routine is used by the globbing code to search a directory for
+ *	all files which match a given pattern.
+ *
+ * Results:
+ *	The return value is a standard Tcl result indicating whether an error
+ *	occurred in globbing. Errors are left in interp, good results are
+ *	lappend'ed to resultPtr (which must be a valid object).
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSMatchInDirectoryProc(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    Tcl_Obj *result,
+    Tcl_Obj *pathPtr,
+    const char *pattern,
+    Tcl_GlobTypeData *types)
+{
+    Tcl_HashEntry *hPtr;
+    Tcl_HashSearch search;
+    Tcl_Obj *normPathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr);
+    int scnt, l, dirOnly = -1, prefixLen, strip = 0;
+    size_t len;
+    char *pat, *prefix, *path;
+    Tcl_DString dsPref;
+
+    if (!normPathPtr) {
+	return -1;
+    }
+    if (types) {
+	dirOnly = (types->type & TCL_GLOB_TYPE_DIR) == TCL_GLOB_TYPE_DIR;
+    }
+
+    /*
+     * The prefix that gets prepended to results.
+     */
+
+    prefix = Tcl_GetStringFromObj(pathPtr, &prefixLen);
+
+    /*
+     * The (normalized) path we're searching.
+     */
+
+    path = Tcl_GetString(normPathPtr);
+    len = normPathPtr->length;
+
+    Tcl_DStringInit(&dsPref);
+    Tcl_DStringAppend(&dsPref, prefix, prefixLen);
+
+    if (strcmp(prefix, path) == 0) {
+	prefix = NULL;
+    } else {
+	strip = len + 1;
+    }
+    if (prefix) {
+	Tcl_DStringAppend(&dsPref, "/", 1);
+	prefixLen++;
+	prefix = Tcl_DStringValue(&dsPref);
+    }
+    ReadLock();
+    if (types && (types->type == TCL_GLOB_TYPE_MOUNT)) {
+	l = CountSlashes(path);
+	if (path[len - 1] == '/') {
+	    len--;
+	} else {
+	    l++;
+	}
+	if (!pattern || (pattern[0] == '\0')) {
+	    pattern = "*";
+	}
+	for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr;
+		hPtr = Tcl_NextHashEntry(&search)) {
+	    ZipFile *zf = Tcl_GetHashValue(hPtr);
+
+	    if (zf->mountPointLen == 0) {
+		ZipEntry *z;
+
+		for (z = zf->topEnts; z; z = z->tnext) {
+		    size_t lenz = strlen(z->name);
+
+		    if ((lenz > len + 1) && (strncmp(z->name, path, len) == 0)
+			    && (z->name[len] == '/')
+			    && (CountSlashes(z->name) == l)
+			    && Tcl_StringCaseMatch(z->name + len + 1, pattern,
+				    0)) {
+			if (prefix) {
+			    Tcl_DStringAppend(&dsPref, z->name, lenz);
+			    Tcl_ListObjAppendElement(NULL, result,
+				    Tcl_NewStringObj(Tcl_DStringValue(&dsPref),
+					    Tcl_DStringLength(&dsPref)));
+			    Tcl_DStringSetLength(&dsPref, prefixLen);
+			} else {
+			    Tcl_ListObjAppendElement(NULL, result,
+				    Tcl_NewStringObj(z->name, lenz));
+			}
+		    }
+		}
+	    } else if ((zf->mountPointLen > len + 1)
+		    && (strncmp(zf->mountPoint, path, len) == 0)
+		    && (zf->mountPoint[len] == '/')
+		    && (CountSlashes(zf->mountPoint) == l)
+		    && Tcl_StringCaseMatch(zf->mountPoint + len + 1,
+			    pattern, 0)) {
+		if (prefix) {
+		    Tcl_DStringAppend(&dsPref, zf->mountPoint,
+			    zf->mountPointLen);
+		    Tcl_ListObjAppendElement(NULL, result,
+			    Tcl_NewStringObj(Tcl_DStringValue(&dsPref),
+				    Tcl_DStringLength(&dsPref)));
+		    Tcl_DStringSetLength(&dsPref, prefixLen);
+		} else {
+		    Tcl_ListObjAppendElement(NULL, result,
+			    Tcl_NewStringObj(zf->mountPoint,
+				    zf->mountPointLen));
+		}
+	    }
+	}
+	goto end;
+    }
+
+    if (!pattern || (pattern[0] == '\0')) {
+	hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, path);
+	if (hPtr) {
+	    ZipEntry *z = Tcl_GetHashValue(hPtr);
+
+	    if ((dirOnly < 0) || (!dirOnly && !z->isDirectory)
+		    || (dirOnly && z->isDirectory)) {
+		if (prefix) {
+		    Tcl_DStringAppend(&dsPref, z->name, -1);
+		    Tcl_ListObjAppendElement(NULL, result,
+			    Tcl_NewStringObj(Tcl_DStringValue(&dsPref),
+				    Tcl_DStringLength(&dsPref)));
+		    Tcl_DStringSetLength(&dsPref, prefixLen);
+		} else {
+		    Tcl_ListObjAppendElement(NULL, result,
+			    Tcl_NewStringObj(z->name, -1));
+		}
+	    }
+	}
+	goto end;
+    }
+
+    l = strlen(pattern);
+    pat = ckalloc(len + l + 2);
+    memcpy(pat, path, len);
+    while ((len > 1) && (pat[len - 1] == '/')) {
+	--len;
+    }
+    if ((len > 1) || (pat[0] != '/')) {
+	pat[len] = '/';
+	++len;
+    }
+    memcpy(pat + len, pattern, l + 1);
+    scnt = CountSlashes(pat);
+    for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search);
+	    hPtr; hPtr = Tcl_NextHashEntry(&search)) {
+	ZipEntry *z = Tcl_GetHashValue(hPtr);
+
+	if ((dirOnly >= 0) && ((dirOnly && !z->isDirectory)
+		|| (!dirOnly && z->isDirectory))) {
+	    continue;
+	}
+	if ((z->depth == scnt) && Tcl_StringCaseMatch(z->name, pat, 0)) {
+	    if (prefix) {
+		Tcl_DStringAppend(&dsPref, z->name + strip, -1);
+		Tcl_ListObjAppendElement(NULL, result,
+			Tcl_NewStringObj(Tcl_DStringValue(&dsPref),
+				Tcl_DStringLength(&dsPref)));
+		Tcl_DStringSetLength(&dsPref, prefixLen);
+	    } else {
+		Tcl_ListObjAppendElement(NULL, result,
+			Tcl_NewStringObj(z->name + strip, -1));
+	    }
+	}
+    }
+    ckfree(pat);
+
+  end:
+    Unlock();
+    Tcl_DStringFree(&dsPref);
+    return TCL_OK;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSPathInFilesystemProc --
+ *
+ *	This function determines if the given path object is in the ZIP
+ *	filesystem.
+ *
+ * Results:
+ *	TCL_OK when the path object is in the ZIP filesystem, -1 otherwise.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSPathInFilesystemProc(
+    Tcl_Obj *pathPtr,
+    ClientData *clientDataPtr)
+{
+    Tcl_HashEntry *hPtr;
+    Tcl_HashSearch search;
+    int ret = -1;
+    size_t len;
+    char *path;
+
+    pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr);
+    if (!pathPtr) {
+	return -1;
+    }
+
+    path = Tcl_GetString(pathPtr);
+    if (strncmp(path, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN) != 0) {
+	return -1;
+    }
+
+    len = pathPtr->length;
+
+    ReadLock();
+    hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, path);
+    if (hPtr) {
+	ret = TCL_OK;
+	goto endloop;
+    }
+
+    for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr;
+	    hPtr = Tcl_NextHashEntry(&search)) {
+	ZipFile *zf = Tcl_GetHashValue(hPtr);
+
+	if (zf->mountPointLen == 0) {
+	    ZipEntry *z;
+
+	    for (z = zf->topEnts; z != NULL; z = z->tnext) {
+		size_t lenz = strlen(z->name);
+
+		if ((len >= lenz) && (strncmp(path, z->name, lenz) == 0)) {
+		    ret = TCL_OK;
+		    goto endloop;
+		}
+	    }
+	} else if ((len >= zf->mountPointLen) &&
+		(strncmp(path, zf->mountPoint, zf->mountPointLen) == 0)) {
+	    ret = TCL_OK;
+	    break;
+	}
+    }
+
+  endloop:
+    Unlock();
+    return ret;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSListVolumesProc --
+ *
+ *	Lists the currently mounted ZIP filesystem volumes.
+ *
+ * Results:
+ *	The list of volumes.
+ *
+ * Side effects:
+ *	None
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static Tcl_Obj *
+ZipFSListVolumesProc(void)
+{
+    return Tcl_NewStringObj(ZIPFS_VOLUME, -1);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSFileAttrStringsProc --
+ *
+ *	This function implements the ZIP filesystem dependent 'file
+ *	attributes' subcommand, for listing the set of possible attribute
+ *	strings.
+ *
+ * Results:
+ *	An array of strings
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static const char *const *
+ZipFSFileAttrStringsProc(
+    Tcl_Obj *pathPtr,
+    Tcl_Obj **objPtrRef)
+{
+    static const char *const attrs[] = {
+	"-uncompsize",
+	"-compsize",
+	"-offset",
+	"-mount",
+	"-archive",
+	"-permissions",
+	NULL,
+    };
+    return attrs;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSFileAttrsGetProc --
+ *
+ *	This function implements the ZIP filesystem specific 'file attributes'
+ *	subcommand, for 'get' operations.
+ *
+ * Results:
+ *	Standard Tcl return code. The object placed in objPtrRef (if TCL_OK
+ *	was returned) is likely to have a refCount of zero. Either way we must
+ *	either store it somewhere (e.g. the Tcl result), or Incr/Decr its
+ *	refCount to ensure it is properly freed.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSFileAttrsGetProc(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int index,
+    Tcl_Obj *pathPtr,
+    Tcl_Obj **objPtrRef)
+{
+    int len, ret = TCL_OK;
+    char *path;
+    ZipEntry *z;
+
+    pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr);
+    if (!pathPtr) {
+	return -1;
+    }
+    path = Tcl_GetStringFromObj(pathPtr, &len);
+    ReadLock();
+    z = ZipFSLookup(path);
+    if (!z) {
+	Tcl_SetErrno(ENOENT);
+	ZIPFS_POSIX_ERROR(interp, "file not found");
+	ret = TCL_ERROR;
+	goto done;
+    }
+    switch (index) {
+    case 0:
+	*objPtrRef = Tcl_NewWideIntObj(z->numBytes);
+	break;
+    case 1:
+	*objPtrRef = Tcl_NewWideIntObj(z->numCompressedBytes);
+	break;
+    case 2:
+	*objPtrRef = Tcl_NewWideIntObj(z->offset);
+	break;
+    case 3:
+	*objPtrRef = Tcl_NewStringObj(z->zipFilePtr->mountPoint,
+		z->zipFilePtr->mountPointLen);
+	break;
+    case 4:
+	*objPtrRef = Tcl_NewStringObj(z->zipFilePtr->name, -1);
+	break;
+    case 5:
+	*objPtrRef = Tcl_NewStringObj("0555", -1);
+	break;
+    default:
+	ZIPFS_ERROR(interp, "unknown attribute");
+	ret = TCL_ERROR;
+    }
+
+  done:
+    Unlock();
+    return ret;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSFileAttrsSetProc --
+ *
+ *	This function implements the ZIP filesystem specific 'file attributes'
+ *	subcommand, for 'set' operations.
+ *
+ * Results:
+ *	Standard Tcl return code.
+ *
+ * Side effects:
+ *	None.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSFileAttrsSetProc(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int index,
+    Tcl_Obj *pathPtr,
+    Tcl_Obj *objPtr)
+{
+    if (interp) {
+	Tcl_SetObjResult(interp, Tcl_NewStringObj("unsupported operation", -1));
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "UNSUPPORTED_OP", NULL);
+    }
+    return TCL_ERROR;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSFilesystemPathTypeProc --
+ *
+ * Results:
+ *
+ * Side effects:
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static Tcl_Obj *
+ZipFSFilesystemPathTypeProc(
+    Tcl_Obj *pathPtr)
+{
+    return Tcl_NewStringObj("zip", -1);
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * ZipFSLoadFile --
+ *
+ *	This functions deals with loading native object code. If the given
+ *	path object refers to a file within the ZIP filesystem, an approriate
+ *	error code is returned to delegate loading to the caller (by copying
+ *	the file to temp store and loading from there). As fallback when the
+ *	file refers to the ZIP file system but is not present, it is looked up
+ *	relative to the executable and loaded from there when available.
+ *
+ * Results:
+ *	TCL_OK on success, TCL_ERROR otherwise with error message left.
+ *
+ * Side effects:
+ *	Loads native code into the process address space.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int
+ZipFSLoadFile(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    Tcl_Obj *path,
+    Tcl_LoadHandle *loadHandle,
+    Tcl_FSUnloadFileProc **unloadProcPtr,
+    int flags)
+{
+    Tcl_FSLoadFileProc2 *loadFileProc;
+#ifdef ANDROID
+    /*
+     * Force loadFileProc to native implementation since the package manager
+     * already extracted the shared libraries from the APK at install time.
+     */
+
+    loadFileProc = (Tcl_FSLoadFileProc2 *) tclNativeFilesystem.loadFileProc;
+    if (loadFileProc) {
+	return loadFileProc(interp, path, loadHandle, unloadProcPtr, flags);
+    }
+    Tcl_SetErrno(ENOENT);
+    ZIPFS_ERROR(interp, Tcl_PosixError(interp));
+    return TCL_ERROR;
+#else /* !ANDROID */
+    Tcl_Obj *altPath = NULL;
+    int ret = TCL_ERROR;
+    Tcl_Obj *objs[2] = { NULL, NULL };
+
+    if (Tcl_FSAccess(path, R_OK) == 0) {
+	/*
+	 * EXDEV should trigger loading by copying to temp store.
+	 */
+
+	Tcl_SetErrno(EXDEV);
+	ZIPFS_ERROR(interp, Tcl_PosixError(interp));
+	return ret;
+    }
+
+    objs[1] = TclPathPart(interp, path, TCL_PATH_DIRNAME);
+    if (objs[1] && (ZipFSAccessProc(objs[1], R_OK) == 0)) {
+	const char *execName = Tcl_GetNameOfExecutable();
+
+	/*
+	 * Shared object is not in ZIP but its path prefix is, thus try to
+	 * load from directory where the executable came from.
+	 */
+
+	TclDecrRefCount(objs[1]);
+	objs[1] = TclPathPart(interp, path, TCL_PATH_TAIL);
+
+	/*
+	 * Get directory name of executable manually to deal with cases where
+	 * [file dirname [info nameofexecutable]] is equal to [info
+	 * nameofexecutable] due to VFS effects.
+	 */
+
+	if (execName) {
+	    const char *p = strrchr(execName, '/');
+
+	    if (p > execName + 1) {
+		--p;
+		objs[0] = Tcl_NewStringObj(execName, p - execName);
+	    }
+	}
+	if (!objs[0]) {
+	    objs[0] = TclPathPart(interp, TclGetObjNameOfExecutable(),
+		    TCL_PATH_DIRNAME);
+	}
+	if (objs[0]) {
+	    altPath = TclJoinPath(2, objs);
+	    if (altPath) {
+		Tcl_IncrRefCount(altPath);
+		if (Tcl_FSAccess(altPath, R_OK) == 0) {
+		    path = altPath;
+		}
+	    }
+	}
+    }
+    if (objs[0]) {
+	Tcl_DecrRefCount(objs[0]);
+    }
+    if (objs[1]) {
+	Tcl_DecrRefCount(objs[1]);
+    }
+
+    loadFileProc = (Tcl_FSLoadFileProc2 *) tclNativeFilesystem.loadFileProc;
+    if (loadFileProc) {
+	ret = loadFileProc(interp, path, loadHandle, unloadProcPtr, flags);
+    } else {
+	Tcl_SetErrno(ENOENT);
+	ZIPFS_ERROR(interp, Tcl_PosixError(interp));
+    }
+    if (altPath) {
+	Tcl_DecrRefCount(altPath);
+    }
+    return ret;
+#endif /* ANDROID */
+}
+
+#endif /* HAVE_ZLIB */
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * TclZipfs_Init --
+ *
+ *	Perform per interpreter initialization of this module.
+ *
+ * Results:
+ *	The return value is a standard Tcl result.
+ *
+ * Side effects:
+ *	Initializes this module if not already initialized, and adds module
+ *	related commands to the given interpreter.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+MODULE_SCOPE int
+TclZipfs_Init(
+    Tcl_Interp *interp)		/* Current interpreter. */
+{
+#ifdef HAVE_ZLIB
+    static const EnsembleImplMap initMap[] = {
+	{"mkimg",	ZipFSMkImgObjCmd,	NULL, NULL, NULL, 1},
+	{"mkzip",	ZipFSMkZipObjCmd,	NULL, NULL, NULL, 1},
+	{"lmkimg",	ZipFSLMkImgObjCmd,	NULL, NULL, NULL, 1},
+	{"lmkzip",	ZipFSLMkZipObjCmd,	NULL, NULL, NULL, 1},
+	/* The 4 entries above are not available in safe interpreters */
+	{"mount",	ZipFSMountObjCmd,	NULL, NULL, NULL, 1},
+	{"mount_data",	ZipFSMountBufferObjCmd,	NULL, NULL, NULL, 1},
+	{"unmount",	ZipFSUnmountObjCmd,	NULL, NULL, NULL, 1},
+	{"mkkey",	ZipFSMkKeyObjCmd,	NULL, NULL, NULL, 1},
+	{"exists",	ZipFSExistsObjCmd,	NULL, NULL, NULL, 0},
+	{"info",	ZipFSInfoObjCmd,	NULL, NULL, NULL, 0},
+	{"list",	ZipFSListObjCmd,	NULL, NULL, NULL, 0},
+	{"canonical",	ZipFSCanonicalObjCmd,	NULL, NULL, NULL, 0},
+	{"root",	ZipFSRootObjCmd,	NULL, NULL, NULL, 0},
+	{NULL, NULL, NULL, NULL, NULL, 0}
+    };
+    static const char findproc[] =
+	"namespace eval ::tcl::zipfs {}\n"
+	"proc ::tcl::zipfs::Find dir {\n"
+	"    set result {}\n"
+	"    if {[catch {glob -directory $dir -nocomplain * .*} list]} {\n"
+	"        return $result\n"
+	"    }\n"
+	"    foreach file $list {\n"
+	"        if {[file tail $file] in {. ..}} {\n"
+	"            continue\n"
+	"        }\n"
+	"        lappend result $file {*}[Find $file]\n"
+	"    }\n"
+	"    return $result\n"
+	"}\n"
+	"proc ::tcl::zipfs::find {directoryName} {\n"
+	"    return [lsort [Find $directoryName]]\n"
+	"}\n";
+
+    /*
+     * One-time initialization.
+     */
+
+    WriteLock();
+    /* Tcl_StaticPackage(interp, "zipfs", TclZipfs_Init, TclZipfs_Init); */
+    if (!ZipFS.initialized) {
+	ZipfsSetup();
+    }
+    Unlock();
+
+    if (interp) {
+	Tcl_Command ensemble;
+	Tcl_Obj *mapObj;
+
+	Tcl_EvalEx(interp, findproc, -1, TCL_EVAL_GLOBAL);
+	Tcl_LinkVar(interp, "::tcl::zipfs::wrmax", (char *) &ZipFS.wrmax,
+		TCL_LINK_INT);
+	ensemble = TclMakeEnsemble(interp, "zipfs",
+		Tcl_IsSafe(interp) ? (initMap + 4) : initMap);
+
+	/*
+	 * Add the [zipfs find] subcommand.
+	 */
+
+	Tcl_GetEnsembleMappingDict(NULL, ensemble, &mapObj);
+	Tcl_DictObjPut(NULL, mapObj, Tcl_NewStringObj("find", -1),
+		Tcl_NewStringObj("::tcl::zipfs::find", -1));
+	Tcl_CreateObjCommand(interp, "::tcl::zipfs::tcl_library_init",
+		ZipFSTclLibraryObjCmd, NULL, NULL);
+	Tcl_PkgProvide(interp, "zipfs", "2.0");
+    }
+    return TCL_OK;
+#else /* !HAVE_ZLIB */
+    ZIPFS_ERROR(interp, "no zlib available");
+    Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL);
+    return TCL_ERROR;
+#endif /* HAVE_ZLIB */
+}
+
+static int
+ZipfsAppHookFindTclInit(
+    const char *archive)
+{
+    Tcl_Obj *vfsInitScript;
+    int found;
+
+    if (zipfs_literal_tcl_library) {
+	return TCL_ERROR;
+    }
+    if (TclZipfs_Mount(NULL, ZIPFS_ZIP_MOUNT, archive, NULL)) {
+	/* Either the file doesn't exist or it is not a zip archive */
+	return TCL_ERROR;
+    }
+
+    TclNewLiteralStringObj(vfsInitScript, ZIPFS_ZIP_MOUNT "/init.tcl");
+    Tcl_IncrRefCount(vfsInitScript);
+    found = Tcl_FSAccess(vfsInitScript, F_OK);
+    Tcl_DecrRefCount(vfsInitScript);
+    if (found == 0) {
+	zipfs_literal_tcl_library = ZIPFS_ZIP_MOUNT;
+	return TCL_OK;
+    }
+
+    TclNewLiteralStringObj(vfsInitScript,
+	    ZIPFS_ZIP_MOUNT "/tcl_library/init.tcl");
+    Tcl_IncrRefCount(vfsInitScript);
+    found = Tcl_FSAccess(vfsInitScript, F_OK);
+    Tcl_DecrRefCount(vfsInitScript);
+    if (found == 0) {
+	zipfs_literal_tcl_library = ZIPFS_ZIP_MOUNT "/tcl_library";
+	return TCL_OK;
+    }
+
+    return TCL_ERROR;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * TclZipfs_AppHook --
+ *
+ *	Performs the argument munging for the shell
+ *
+ *-------------------------------------------------------------------------
+ */
+
+int
+TclZipfs_AppHook(
+    int *argcPtr,		/* Pointer to argc */
+#ifdef _WIN32
+    TCHAR
+#else /* !_WIN32 */
+    char
+#endif /* _WIN32 */
+    ***argvPtr)			/* Pointer to argv */
+{
+    char *archive;
+
+    Tcl_FindExecutable((*argvPtr)[0]);
+    archive = (char *) Tcl_GetNameOfExecutable();
+    TclZipfs_Init(NULL);
+
+    /*
+     * Look for init.tcl in one of the locations mounted later in this
+     * function.
+     */
+
+    if (!TclZipfs_Mount(NULL, ZIPFS_APP_MOUNT, archive, NULL)) {
+	int found;
+	Tcl_Obj *vfsInitScript;
+
+	TclNewLiteralStringObj(vfsInitScript, ZIPFS_APP_MOUNT "/main.tcl");
+	Tcl_IncrRefCount(vfsInitScript);
+	if (Tcl_FSAccess(vfsInitScript, F_OK) == 0) {
+	    /*
+	     * Startup script should be set before calling Tcl_AppInit
+	     */
+
+	    Tcl_SetStartupScript(vfsInitScript, NULL);
+	} else {
+	    Tcl_DecrRefCount(vfsInitScript);
+	}
+
+	/*
+	 * Set Tcl Encodings
+	 */
+
+	if (!zipfs_literal_tcl_library) {
+	    TclNewLiteralStringObj(vfsInitScript,
+		    ZIPFS_APP_MOUNT "/tcl_library/init.tcl");
+	    Tcl_IncrRefCount(vfsInitScript);
+	    found = Tcl_FSAccess(vfsInitScript, F_OK);
+	    Tcl_DecrRefCount(vfsInitScript);
+	    if (found == TCL_OK) {
+		zipfs_literal_tcl_library = ZIPFS_APP_MOUNT "/tcl_library";
+		return TCL_OK;
+	    }
+	}
+#ifdef SUPPORT_BUILTIN_ZIP_INSTALL
+    } else if (*argcPtr > 1) {
+	/*
+	 * If the first argument is "install", run the supplied installer
+	 * script.
+	 */
+
+#ifdef _WIN32
+	Tcl_DString ds;
+
+	archive = Tcl_WinTCharToUtf((*argvPtr)[1], -1, &ds);
+#else /* !_WIN32 */
+	archive = (*argvPtr)[1];
+#endif /* _WIN32 */
+	if (strcmp(archive, "install") == 0) {
+	    Tcl_Obj *vfsInitScript;
+
+	    /*
+	     * Run this now to ensure the file is present by the time Tcl_Main
+	     * wants it.
+	     */
+
+	    TclZipfs_TclLibrary();
+	    TclNewLiteralStringObj(vfsInitScript,
+		    ZIPFS_ZIP_MOUNT "/tcl_library/install.tcl");
+	    Tcl_IncrRefCount(vfsInitScript);
+	    if (Tcl_FSAccess(vfsInitScript, F_OK) == 0) {
+		Tcl_SetStartupScript(vfsInitScript, NULL);
+	    }
+	    return TCL_OK;
+	} else if (!TclZipfs_Mount(NULL, ZIPFS_APP_MOUNT, archive, NULL)) {
+	    int found;
+	    Tcl_Obj *vfsInitScript;
+
+	    TclNewLiteralStringObj(vfsInitScript, ZIPFS_APP_MOUNT "/main.tcl");
+	    Tcl_IncrRefCount(vfsInitScript);
+	    if (Tcl_FSAccess(vfsInitScript, F_OK) == 0) {
+		/*
+		 * Startup script should be set before calling Tcl_AppInit
+		 */
+
+		Tcl_SetStartupScript(vfsInitScript, NULL);
+	    } else {
+		Tcl_DecrRefCount(vfsInitScript);
+	    }
+	    /* Set Tcl Encodings */
+	    TclNewLiteralStringObj(vfsInitScript,
+		    ZIPFS_APP_MOUNT "/tcl_library/init.tcl");
+	    Tcl_IncrRefCount(vfsInitScript);
+	    found = Tcl_FSAccess(vfsInitScript, F_OK);
+	    Tcl_DecrRefCount(vfsInitScript);
+	    if (found == TCL_OK) {
+		zipfs_literal_tcl_library = ZIPFS_APP_MOUNT "/tcl_library";
+		return TCL_OK;
+	    }
+	}
+#ifdef _WIN32
+	Tcl_DStringFree(&ds);
+#endif /* _WIN32 */
+#endif /* SUPPORT_BUILTIN_ZIP_INSTALL */
+    }
+    return TCL_OK;
+}
+
+#ifndef HAVE_ZLIB
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * TclZipfs_Mount, TclZipfs_MountBuffer, TclZipfs_Unmount --
+ *
+ *	Dummy version when no ZLIB support available.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+int
+TclZipfs_Mount(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    const char *mountPoint,	/* Mount point path. */
+    const char *zipname,	/* Path to ZIP file to mount. */
+    const char *passwd)		/* Password for opening the ZIP, or NULL if
+				 * the ZIP is unprotected. */
+{
+    ZIPFS_ERROR(interp, "no zlib available");
+    if (interp) {
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL);
+    }
+    return TCL_ERROR;
+}
+
+int
+TclZipfs_MountBuffer(
+    Tcl_Interp *interp,		/* Current interpreter. NULLable. */
+    const char *mountPoint,	/* Mount point path. */
+    unsigned char *data,
+    size_t datalen,
+    int copy)
+{
+    ZIPFS_ERROR(interp, "no zlib available");
+    if (interp) {
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL);
+    }
+    return TCL_ERROR;
+}
+
+int
+TclZipfs_Unmount(
+    Tcl_Interp *interp,		/* Current interpreter. */
+    const char *mountPoint)	/* Mount point path. */
+{
+    ZIPFS_ERROR(interp, "no zlib available");
+    if (interp) {
+	Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL);
+    }
+    return TCL_ERROR;
+}
+#endif /* !HAVE_ZLIB */
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/generic/tclZlib.c b/generic/tclZlib.c
index 994bcef..d4a8ecb 100644
--- a/generic/tclZlib.c
+++ b/generic/tclZlib.c
@@ -117,7 +117,7 @@ typedef struct {
     z_stream outStream;		/* Structure used by zlib for compression of
 				 * output. */
     char *inBuffer, *outBuffer;	/* Working buffers. */
-    int inAllocated, outAllocated;
+    size_t inAllocated, outAllocated;
 				/* Sizes of working buffers. */
     GzipHeader inHeader;	/* Header read from input stream, when
 				 * decompressing a gzip stream. */
@@ -1515,7 +1515,7 @@ Tcl_ZlibStreamGet(
 	    Tcl_ListObjIndex(NULL, zshPtr->outData, 0, &itemObj);
 	    itemPtr = Tcl_GetByteArrayFromObj(itemObj, &itemLen);
 	    if (itemLen-zshPtr->outPos >= count-dataPos) {
-		unsigned len = count - dataPos;
+		size_t len = count - dataPos;
 
 		memcpy(dataPtr + dataPos, itemPtr + zshPtr->outPos, len);
 		zshPtr->outPos += len;
@@ -1524,7 +1524,7 @@ Tcl_ZlibStreamGet(
 		    zshPtr->outPos = 0;
 		}
 	    } else {
-		unsigned len = itemLen - zshPtr->outPos;
+		size_t len = itemLen - zshPtr->outPos;
 
 		memcpy(dataPtr + dataPos, itemPtr + zshPtr->outPos, len);
 		dataPos += len;
@@ -2931,7 +2931,7 @@ ZlibTransformClose(
 		result = TCL_ERROR;
 		break;
 	    }
-	    if (written && Tcl_WriteRaw(cd->parent, cd->outBuffer, written) < 0) {
+	    if (written && Tcl_WriteRaw(cd->parent, cd->outBuffer, written) == TCL_IO_FAILURE) {
 		/* TODO: is this the right way to do errors on close?
 		 * Note: when close is called from FinalizeIOSubsystem then
 		 * interp may be NULL */
@@ -3130,7 +3130,7 @@ ZlibTransformOutput(
 	    break;
 	}
 
-	if (Tcl_WriteRaw(cd->parent, cd->outBuffer, produced) < 0) {
+	if (Tcl_WriteRaw(cd->parent, cd->outBuffer, produced) == TCL_IO_FAILURE) {
 	    *errorCodePtr = Tcl_GetErrno();
 	    return -1;
 	}
@@ -3186,7 +3186,7 @@ ZlibTransformFlush(
 	 * Write the bytes we've received to the next layer.
 	 */
 
-	if (len > 0 && Tcl_WriteRaw(cd->parent, cd->outBuffer, len) < 0) {
+	if (len > 0 && Tcl_WriteRaw(cd->parent, cd->outBuffer, len) == TCL_IO_FAILURE) {
 	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
 		    "problem flushing channel: %s",
 		    Tcl_PosixError(interp)));
@@ -3909,6 +3909,12 @@ TclZlibInit(
     Tcl_RegisterConfig(interp, "zlib", cfg, "iso8859-1");
 
     /*
+     * Allow command type introspection to do something sensible with streams.
+     */
+
+    TclRegisterCommandTypeName(ZlibStreamCmd, "zlibStream");
+
+    /*
      * Formally provide the package as a Tcl built-in.
      */
 
diff --git a/library/auto.tcl b/library/auto.tcl
index a7a8979..7ef5681 100644
--- a/library/auto.tcl
+++ b/library/auto.tcl
@@ -74,6 +74,57 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} {
             lappend dirs $env($enVarName)
         }
 
+	catch {
+      set found 0
+	    set root [zipfs root]
+	    set mountpoint [file join $root lib [string tolower $basename]]
+      lappend dirs [file join $root app ${basename}_library]
+      lappend dirs [file join $root lib $mountpoint ${basename}_library]
+      lappend dirs [file join $root lib $mountpoint]
+	    if {![zipfs exists [file join $root app ${basename}_library]] \
+	      && ![zipfs exists $mountpoint]} {
+	      set found 0
+	      foreach pkgdat [info loaded] {
+	        lassign $pkgdat dllfile dllpkg
+	        if {[string tolower $dllpkg] ne [string tolower $basename]} continue
+	        if {$dllfile eq {}} {
+	          # Loaded statically
+	          break
+	        }
+          set found 1
+	        zipfs mount $mountpoint $dllfile
+	        break
+	      }
+	      if {!$found} {
+  	      set paths {}
+  	      lappend paths [file join $root app]
+    	    lappend paths [::${basename}::pkgconfig get libdir,runtime]
+	        lappend paths [::${basename}::pkgconfig get bindir,runtime]
+	        if {[catch {::${basename}::pkgconfig get zipfile,runtime} zipfile]} {
+  	        set zipfile [string tolower \
+  	          "lib${basename}_[join [list {*}[split $version .] {*}$patch] _].zip"]
+  	      }
+  	      lappend paths [file dirname [file join [pwd] [info nameofexecutable]]]
+          foreach path $paths {
+            set archive [file join $path $zipfile]
+            if {![file exists $archive]} continue
+            zipfs mount $mountpoint $archive
+            if {[zipfs exists [file join $mountpoint ${basename}_library $initScript]]} {
+              lappend dirs [file join $mountpoint ${basename}_library]
+              set found 1
+              break
+            } elseif {[zipfs exists [file join $mountpoint $initScript]]} {
+              lappend dirs [file join $mountpoint $initScript]
+              set found 1
+              break
+            } else {
+              catch {zipfs unmount $archive}
+            }
+          }
+        }
+      }
+   }
+
 	# 2. In the package script directory registered within the
 	#    configuration of the package itself.
 
diff --git a/library/http/http.tcl b/library/http/http.tcl
index 186d067..f82bced 100644
--- a/library/http/http.tcl
+++ b/library/http/http.tcl
@@ -11,7 +11,7 @@
 package require Tcl 8.6-
 # Keep this in sync with pkgIndex.tcl and with the install directories in
 # Makefiles
-package provide http 2.8.13
+package provide http 2.9.0
 
 namespace eval http {
     # Allow resourcing to not clobber existing data
@@ -20,26 +20,30 @@ namespace eval http {
     if {![info exists http]} {
 	array set http {
 	    -accept */*
+	    -pipeline 1
+	    -postfresh 0
 	    -proxyhost {}
 	    -proxyport {}
 	    -proxyfilter http::ProxyRequired
+	    -repost 0
 	    -urlencoding utf-8
+	    -zip 1
 	}
-	# We need a useragent string of this style or various servers will refuse to
-	# send us compressed content even when we ask for it. This follows the
-	# de-facto layout of user-agent strings in current browsers.
+	# We need a useragent string of this style or various servers will
+	# refuse to send us compressed content even when we ask for it. This
+	# follows the de-facto layout of user-agent strings in current browsers.
 	# Safe interpreters do not have ::tcl_platform(os) or
 	# ::tcl_platform(osVersion).
 	if {[interp issafe]} {
 	    set http(-useragent) "Mozilla/5.0\
-                (Windows; U;\
-                Windows NT 10.0)\
-                http/[package provide http] Tcl/[package provide Tcl]"
+		(Windows; U;\
+		Windows NT 10.0)\
+		http/[package provide http] Tcl/[package provide Tcl]"
 	} else {
 	    set http(-useragent) "Mozilla/5.0\
-                ([string totitle $::tcl_platform(platform)]; U;\
-                $::tcl_platform(os) $::tcl_platform(osVersion))\
-                http/[package provide http] Tcl/[package provide Tcl]"
+		([string totitle $::tcl_platform(platform)]; U;\
+		$::tcl_platform(os) $::tcl_platform(osVersion))\
+		http/[package provide http] Tcl/[package provide Tcl]"
 	}
     }
 
@@ -60,14 +64,42 @@ namespace eval http {
 	variable formMap [array get map]
 
 	# Create a map for HTTP/1.1 open sockets
-	variable socketmap
-	if {[info exists socketmap]} {
-	    # Close but don't remove open sockets on re-init
-	    foreach {url sock} [array get socketmap] {
-		catch {close $sock}
+	variable socketMapping
+	variable socketRdState
+	variable socketWrState
+	variable socketRdQueue
+	variable socketWrQueue
+	variable socketClosing
+	variable socketPlayCmd
+	if {[info exists socketMapping]} {
+	    # Close open sockets on re-init.  Do not permit retries.
+	    foreach {url sock} [array get socketMapping] {
+		unset -nocomplain socketClosing($url)
+		unset -nocomplain socketPlayCmd($url)
+		CloseSocket $sock
 	    }
 	}
-	array set socketmap {}
+
+	# CloseSocket should have unset the socket* arrays, one element at
+	# a time.  Now unset anything that was overlooked.
+	# Traces on "unset socketRdState(*)" will call CancelReadPipeline and
+	# cancel any queued responses.
+	# Traces on "unset socketWrState(*)" will call CancelWritePipeline and
+	# cancel any queued requests.
+	array unset socketMapping
+	array unset socketRdState
+	array unset socketWrState
+	array unset socketRdQueue
+	array unset socketWrQueue
+	array unset socketClosing
+	array unset socketPlayCmd
+	array set socketMapping {}
+	array set socketRdState {}
+	array set socketWrState {}
+	array set socketRdQueue {}
+	array set socketWrQueue {}
+	array set socketClosing {}
+	array set socketPlayCmd {}
     }
     init
 
@@ -95,8 +127,13 @@ namespace eval http {
 	set defaultKeepalive 0
     }
 
-    namespace export geturl config reset wait formatQuery register unregister
-    # Useful, but not exported: data size status code
+    namespace export geturl config reset wait formatQuery quoteString
+    namespace export register unregister registerError
+    # - Useful, but not exported: data, size, status, code, cleanup, error,
+    #   meta, ncode, mapReply, init.  Comments suggest that "init" can be used
+    #   for re-initialisation, although the command is undocumented.
+    # - Not exported, probably should be upper-case initial letter as part
+    #   of the internals: getTextLine, make-transformation-chunked.
 }
 
 # http::Log --
@@ -190,40 +227,279 @@ proc http::config {args} {
 # Arguments:
 #	token	    Connection token.
 #	errormsg    (optional) If set, forces status to error.
-#       skipCB      (optional) If set, don't call the -command callback. This
+#	skipCB      (optional) If set, don't call the -command callback. This
 #		    is useful when geturl wants to throw an exception instead
 #		    of calling the callback. That way, the same error isn't
 #		    reported to two places.
 #
 # Side Effects:
-#        Closes the socket
+#        May close the socket.
 
 proc http::Finish {token {errormsg ""} {skipCB 0}} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
     variable $token
     upvar 0 $token state
     global errorInfo errorCode
+    set closeQueue 0
     if {$errormsg ne ""} {
 	set state(error) [list $errormsg $errorInfo $errorCode]
 	set state(status) "error"
     }
-    if { ($state(status) eq "timeout")
+    if {[info commands ${token}EventCoroutine] ne {}} {
+	rename ${token}EventCoroutine {}
+    }
+    if {  ($state(status) eq "timeout")
        || ($state(status) eq "error")
+       || ($state(status) eq "eof")
        || ([info exists state(-keepalive)] && !$state(-keepalive))
        || ([info exists state(connection)] && ($state(connection) eq "close"))
     } {
-        CloseSocket $state(sock) $token
+	set closeQueue 1
+	set connId $state(socketinfo)
+	set sock $state(sock)
+	CloseSocket $state(sock) $token
+    } elseif {
+	  ([info exists state(-keepalive)] && $state(-keepalive))
+       && ([info exists state(connection)] && ($state(connection) ne "close"))
+    } {
+	KeepSocket $token
     }
     if {[info exists state(after)]} {
 	after cancel $state(after)
+	unset state(after)
     }
-    if {[info exists state(-command)] && !$skipCB
-	    && ![info exists state(done-command-cb)]} {
+    if {[info exists state(-command)] && (!$skipCB)
+	    && (![info exists state(done-command-cb)])} {
 	set state(done-command-cb) yes
 	if {[catch {eval $state(-command) {$token}} err] && $errormsg eq ""} {
 	    set state(error) [list $err $errorInfo $errorCode]
 	    set state(status) error
 	}
     }
+
+    if {    $closeQueue
+	 && [info exists socketMapping($connId)]
+	 && ($socketMapping($connId) eq $sock)
+    } {
+	http::CloseQueuedQueries $connId $token
+    }
+}
+
+# http::KeepSocket -
+#
+#	Keep a socket in the persistent sockets table and connect it to its next
+#	queued task if possible.  Otherwise leave it idle and ready for its next
+#	use.
+#
+#	If $socketClosing(*), then ($state(connection) eq "close") and therefore
+#	this command will not be called by Finish.
+#
+# Arguments:
+#	token	    Connection token.
+
+proc http::KeepSocket {token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+
+    # Keep this socket open for another request ("Keep-Alive").
+    # React if the server half-closes the socket.
+    # Discussion is in http::geturl.
+    catch {fileevent $state(sock) readable [list http::CheckEof $state(sock)]}
+
+    # The line below should not be changed in production code.
+    # It is edited by the test suite.
+    set TEST_EOF 0
+    if {$TEST_EOF} {
+	# ONLY for testing reaction to server eof.
+	# No server timeouts will be caught.
+	catch {fileevent $state(sock) readable {}}
+    }
+
+    if {    [info exists state(socketinfo)]
+	 && [info exists socketMapping($state(socketinfo))]
+    } {
+	set connId $state(socketinfo)
+	# The value "Rready" is set only here.
+	set socketRdState($connId) Rready
+
+	if {    $state(-pipeline)
+	     && [info exists socketRdQueue($connId)]
+	     && [llength $socketRdQueue($connId)]
+	} {
+	    # The usual case for pipelined responses - if another response is
+	    # queued, arrange to read it.
+	    set token3 [lindex $socketRdQueue($connId) 0]
+	    set socketRdQueue($connId) [lrange $socketRdQueue($connId) 1 end]
+	    variable $token3
+	    upvar 0 $token3 state3
+	    set tk2 [namespace tail $token3]
+
+	    #Log pipelined, GRANT read access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    ReceiveResponse $token3
+
+	    # Other pipelined cases.
+	    # - The test above ensures that, for the pipelined cases in the two
+	    #   tests below, the read queue is empty.
+	    # - In those two tests, check whether the next write will be
+	    #   nonpipeline.
+	} elseif {
+		$state(-pipeline)
+	     && [info exists socketWrState($connId)]
+	     && ($socketWrState($connId) eq "peNding")
+
+	     && [info exists socketWrQueue($connId)]
+	     && [llength $socketWrQueue($connId)]
+	     && (![set token3 [lindex $socketWrQueue($connId) 0]
+		   set ${token3}(-pipeline)
+		  ]
+		)
+	} {
+	    # This case:
+	    # - Now it the time to run the "pending" request.
+	    # - The next token in the write queue is nonpipeline, and
+	    #   socketWrState has been marked "pending" (in
+	    #   http::NextPipelinedWrite or http::geturl) so a new pipelined
+	    #   request cannot jump the queue.
+	    #
+	    # Tests:
+	    # - In this case the read queue (tested above) is empty and this
+	    #   "pending" write token is in front of the rest of the write
+	    #   queue.
+	    # - The write state is not Wready and therefore appears to be busy,
+	    #   but because it is "pending" we know that it is reserved for the
+	    #   first item in the write queue, a non-pipelined request that is
+	    #   waiting for the read queue to empty.  That has now happened: so
+	    #   give that request read and write access.
+	    variable $token3
+	    set conn [set ${token3}(tmpConnArgs)]
+	    #Log nonpipeline, GRANT r/w access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    set socketWrState($connId) $token3
+	    set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	    # Connect does its own fconfigure.
+	    fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	    #Log ---- $state(sock) << conn to $token3 for HTTP request (c)
+
+	} elseif {
+		$state(-pipeline)
+	     && [info exists socketWrState($connId)]
+	     && ($socketWrState($connId) eq "peNding")
+
+	} {
+	    # Should not come here.  The second block in the previous "elseif"
+	    # test should be tautologous (but was needed in an earlier
+	    # implementation) and will be removed after testing.
+	    # If we get here, the value "pending" was assigned in error.
+	    # This error would block the queue for ever.
+	    Log ^X$tk <<<<< Error in queueing of requests >>>>> - token $token
+
+	} elseif {
+		$state(-pipeline)
+	     && [info exists socketWrState($connId)]
+	     && ($socketWrState($connId) eq "Wready")
+
+	     && [info exists socketWrQueue($connId)]
+	     && [llength $socketWrQueue($connId)]
+	     && (![set token3 [lindex $socketWrQueue($connId) 0]
+		   set ${token3}(-pipeline)
+		  ]
+		)
+	} {
+	    # This case:
+	    # - The next token in the write queue is nonpipeline, and
+	    #   socketWrState is Wready.  Get the next event from socketWrQueue.
+	    # Tests:
+	    # - In this case the read state (tested above) is Rready and the
+	    #   write state (tested here) is Wready - there is no "pending"
+	    #   request.
+	    # Code:
+	    # - The code is the same as the code below for the nonpipelined
+	    #   case with a queued request.
+	    variable $token3
+	    set conn [set ${token3}(tmpConnArgs)]
+	    #Log nonpipeline, GRANT r/w access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    set socketWrState($connId) $token3
+	    set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	    # Connect does its own fconfigure.
+	    fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	    #Log ---- $state(sock) << conn to $token3 for HTTP request (c)
+
+	} elseif {
+		(!$state(-pipeline))
+	     && [info exists socketWrQueue($connId)]
+	     && [llength $socketWrQueue($connId)]
+	     && ($state(connection) ne "close")
+	} {
+	    # If not pipelined, (socketRdState eq Rready) tells us that we are
+	    # ready for the next write - there is no need to check
+	    # socketWrState. Write the next request, if one is waiting.
+	    # If the next request is pipelined, it receives premature read
+	    # access to the socket. This is not a problem.
+	    set token3 [lindex $socketWrQueue($connId) 0]
+	    variable $token3
+	    set conn [set ${token3}(tmpConnArgs)]
+	    #Log nonpipeline, GRANT r/w access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    set socketWrState($connId) $token3
+	    set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	    # Connect does its own fconfigure.
+	    fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	    #Log ---- $state(sock) << conn to $token3 for HTTP request (d)
+
+	} elseif {(!$state(-pipeline))} {
+	    set socketWrState($connId) Wready
+	    # Rready and Wready and idle: nothing to do.
+	}
+
+    } else {
+	CloseSocket $state(sock) $token
+	# There is no socketMapping($state(socketinfo)), so it does not matter
+	# that CloseQueuedQueries is not called.
+    }
+}
+
+# http::CheckEof -
+#
+#	Read from a socket and close it if eof.
+#	The command is bound to "fileevent readable" on an idle socket, and
+#	"eof" is the only event that should trigger the binding, occurring when
+#	the server times out and half-closes the socket.
+#
+#	A read is necessary so that [eof] gives a meaningful result.
+#	Any bytes sent are junk (or a bug).
+
+proc http::CheckEof {sock} {
+    set junk [read $sock]
+    set n [string length $junk]
+    if {$n} {
+	Log "WARNING: $n bytes received but no HTTP request sent"
+    }
+
+    if {[catch {eof $sock} res] || $res} {
+	# The server has half-closed the socket.
+	# If a new write has started, its transaction will fail and
+	# will then be error-handled.
+	CloseSocket $sock
+    }
 }
 
 # http::CloseSocket -
@@ -231,44 +507,137 @@ proc http::Finish {token {errormsg ""} {skipCB 0}} {
 #	Close a socket and remove it from the persistent sockets table.  If
 #	possible an http token is included here but when we are called from a
 #	fileevent on remote closure we need to find the correct entry - hence
-#	the second section.
+#	the "else" block of the first "if" command.
+
+proc http::CloseSocket {s {token {}}} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    set tk [namespace tail $token]
 
-proc ::http::CloseSocket {s {token {}}} {
-    variable socketmap
     catch {fileevent $s readable {}}
-    set conn_id {}
+    set connId {}
     if {$token ne ""} {
-        variable $token
-        upvar 0 $token state
-        if {[info exists state(socketinfo)]} {
-	    set conn_id $state(socketinfo)
-        }
+	variable $token
+	upvar 0 $token state
+	if {[info exists state(socketinfo)]} {
+	    set connId $state(socketinfo)
+	}
     } else {
-        set map [array get socketmap]
-        set ndx [lsearch -exact $map $s]
-        if {$ndx != -1} {
+	set map [array get socketMapping]
+	set ndx [lsearch -exact $map $s]
+	if {$ndx != -1} {
 	    incr ndx -1
-	    set conn_id [lindex $map $ndx]
-        }
+	    set connId [lindex $map $ndx]
+	}
     }
-    if {$conn_id eq {} || ![info exists socketmap($conn_id)]} {
-        Log "Closing socket $s (no connection info)"
-        if {[catch {close $s} err]} {
-	    Log "Error: $err"
+    if {    ($connId ne {})
+	 && [info exists socketMapping($connId)]
+	 && ($socketMapping($connId) eq $s)
+    } {
+	Log "Closing connection $connId (sock $socketMapping($connId))"
+	if {[catch {close $socketMapping($connId)} err]} {
+	    Log "Error closing connection: $err"
+	}
+	if {$token eq {}} {
+	    # Cases with a non-empty token are handled by Finish, so the tokens
+	    # are finished in connection order.
+	    http::CloseQueuedQueries $connId
 	}
     } else {
-	if {[info exists socketmap($conn_id)]} {
-	    Log "Closing connection $conn_id (sock $socketmap($conn_id))"
-	    if {[catch {close $socketmap($conn_id)} err]} {
-		Log "Error: $err"
-	    }
-	    unset socketmap($conn_id)
-	} else {
-	    Log "Cannot close connection $conn_id - no socket in socket map"
+	Log "Closing socket $s (no connection info)"
+	if {[catch {close $s} err]} {
+	    Log "Error closing socket: $err"
 	}
     }
 }
 
+# http::CloseQueuedQueries
+#
+#	connId  - identifier "domain:port" for the connection
+#	token   - (optional) used only for logging
+#
+# Called from http::CloseSocket and http::Finish, after a connection is closed,
+# to clear the read and write queues if this has not already been done.
+
+proc http::CloseQueuedQueries {connId {token {}}} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    if {![info exists socketMapping($connId)]} {
+	# Command has already been called.
+	# Don't come here again - especially recursively.
+	return
+    }
+
+    # Used only for logging.
+    if {$token eq {}} {
+	set tk {}
+    } else {
+	set tk [namespace tail $token]
+    }
+
+    if {    [info exists socketPlayCmd($connId)]
+	 && ($socketPlayCmd($connId) ne {ReplayIfClose Wready {} {}})
+    } {
+	# Before unsetting, there is some unfinished business.
+	# - If the server sent "Connection: close", we have stored the command
+	#   for retrying any queued requests in socketPlayCmd, so copy that
+	#   value for execution below.  socketClosing(*) was also set.
+	# - Also clear the queues to prevent calls to Finish that would set the
+	#   state for the requests that will be retried to "finished with error
+	#   status".
+	set unfinished $socketPlayCmd($connId)
+	set socketRdQueue($connId) {}
+	set socketWrQueue($connId) {}
+    } else {
+	set unfinished {}
+    }
+
+    Unset $connId
+
+    if {$unfinished ne {}} {
+	Log ^R$tk Any unfinished transactions (excluding $token) failed \
+		- token $token
+	{*}$unfinished
+    }
+}
+
+# http::Unset
+#
+#	The trace on "unset socketRdState(*)" will call CancelReadPipeline
+#	and cancel any queued responses.
+#	The trace on "unset socketWrState(*)" will call CancelWritePipeline
+#	and cancel any queued requests.
+
+proc http::Unset {connId} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    unset socketMapping($connId)
+    unset socketRdState($connId)
+    unset socketWrState($connId)
+    unset -nocomplain socketRdQueue($connId)
+    unset -nocomplain socketWrQueue($connId)
+    unset -nocomplain socketClosing($connId)
+    unset -nocomplain socketPlayCmd($connId)
+}
+
 # http::reset --
 #
 #	See documentation for details.
@@ -278,7 +647,7 @@ proc ::http::CloseSocket {s {token {}}} {
 #	why	Status info.
 #
 # Side Effects:
-#       See Finish
+#        See Finish
 
 proc http::reset {token {why reset}} {
     variable $token
@@ -299,8 +668,8 @@ proc http::reset {token {why reset}} {
 #	Establishes a connection to a remote url via http.
 #
 # Arguments:
-#       url		The http URL to goget.
-#       args		Option value pairs. Valid options include:
+#	url		The http URL to goget.
+#	args		Option value pairs. Valid options include:
 #				-blocksize, -validate, -headers, -timeout
 # Results:
 #	Returns a token for this connection. This token is the name of an
@@ -320,9 +689,12 @@ proc http::geturl {url args} {
 	set http(uid) 0
     }
     set token [namespace current]::[incr http(uid)]
+    ##Log Starting http::geturl - token $token
     variable $token
     upvar 0 $token state
+    set tk [namespace tail $token]
     reset $token
+    Log ^A$tk URL $url - token $token
 
     # Process command options.
 
@@ -337,8 +709,9 @@ proc http::geturl {url args} {
 	-queryprogress	{}
 	-protocol	1.1
 	binary		0
-	state		connecting
+	state		created
 	meta		{}
+	method		{}
 	coding		{}
 	currentsize	0
 	totalsize	0
@@ -555,14 +928,7 @@ proc http::geturl {url args} {
     # Don't append the fragment!
     set state(url) $url
 
-    # If a timeout is specified we set up the after event and arrange for an
-    # asynchronous socket connection.
-
     set sockopts [list -async]
-    if {$state(-timeout) > 0} {
-	set state(after) [after $state(-timeout) \
-		[list http::reset $token timeout]]
-    }
 
     # If we are using the proxy, we must pass in the full URL that includes
     # the server name.
@@ -580,52 +946,295 @@ proc http::geturl {url args} {
     # c11a51c482]
     set state(accept-types) $http(-accept)
 
+    if {$isQuery || $isQueryChannel} {
+	# It's a POST.
+	# A client wishing to send a non-idempotent request SHOULD wait to send
+	# that request until it has received the response status for the
+	# previous request.
+	if {$http(-postfresh)} {
+	    # Override -keepalive for a POST.  Use a new connection, and thus
+	    # avoid the small risk of a race against server timeout.
+	    set state(-keepalive) 0
+	} else {
+	    # Allow -keepalive but do not -pipeline - wait for the previous
+	    # transaction to finish.
+	    # There is a small risk of a race against server timeout.
+	    set state(-pipeline) 0
+	}
+    } else {
+	# It's a GET or HEAD.
+	set state(-pipeline) $http(-pipeline)
+    }
+
     # See if we are supposed to use a previously opened channel.
+    # - In principle, ANY call to http::geturl could use a previously opened
+    #   channel if it is available - the "Connection: keep-alive" header is a
+    #   request to leave the channel open AFTER completion of this call.
+    # - In fact, we try to use an existing channel only if -keepalive 1 -- this
+    #   means that at most one channel is left open for each value of
+    #   $state(socketinfo). This property simplifies the mapping of open
+    #   channels.
+    set reusing 0
+    set alreadyQueued 0
     if {$state(-keepalive)} {
-	variable socketmap
-	if {[info exists socketmap($state(socketinfo))]} {
-	    if {[catch {fconfigure $socketmap($state(socketinfo))}]} {
-		Log "WARNING: socket for $state(socketinfo) was closed"
-		unset socketmap($state(socketinfo))
+	variable socketMapping
+	variable socketRdState
+	variable socketWrState
+	variable socketRdQueue
+	variable socketWrQueue
+	variable socketClosing
+	variable socketPlayCmd
+
+	if {[info exists socketMapping($state(socketinfo))]} {
+	    # - If the connection is idle, it has a "fileevent readable" binding
+	    #   to http::CheckEof, in case the server times out and half-closes
+	    #   the socket (http::CheckEof closes the other half).
+	    # - We leave this binding in place until just before the last
+	    #   puts+flush in http::Connected (GET/HEAD) or http::Write (POST),
+	    #   after which the HTTP response might be generated.
+
+	    if {    [info exists socketClosing($state(socketinfo))]
+		       && $socketClosing($state(socketinfo))
+	    } {
+		# socketClosing(*) is set because the server has sent a
+		# "Connection: close" header.
+		# Do not use the persistent socket again.
+		# Since we have only one persistent socket per server, and the
+		# old socket is not yet dead, add the request to the write queue
+		# of the dying socket, which will be replayed by ReplayIfClose.
+		# Also add it to socketWrQueue(*) which is used only if an error
+		# causes a call to Finish.
+		set reusing 1
+		set sock $socketMapping($state(socketinfo))
+		Log "reusing socket $sock for $state(socketinfo) - token $token"
+
+		set alreadyQueued 1
+		lassign $socketPlayCmd($state(socketinfo)) com0 com1 com2 com3
+		lappend com3 $token
+		set socketPlayCmd($state(socketinfo)) [list $com0 $com1 $com2 $com3]
+		lappend socketWrQueue($state(socketinfo)) $token
+	    } elseif {[catch {fconfigure $socketMapping($state(socketinfo))}]} {
+		# FIXME Is it still possible for this code to be executed? If
+		#       so, this could be another place to call TestForReplay,
+		#       rather than discarding the queued transactions.
+		Log "WARNING: socket for $state(socketinfo) was closed\
+			- token $token"
+		Log "WARNING - if testing, pay special attention to this\
+			case (GH) which is seldom executed - token $token"
+
+		# This will call CancelReadPipeline, CancelWritePipeline, and
+		# cancel any queued requests, responses.
+		Unset $state(socketinfo)
 	    } else {
-		set sock $socketmap($state(socketinfo))
-		Log "reusing socket $sock for $state(socketinfo)"
-		catch {fileevent $sock writable {}}
-		catch {fileevent $sock readable {}}
+		# Use the persistent socket.
+		# The socket may not be ready to write: an earlier request might
+		# still be still writing (in the pipelined case) or
+		# writing/reading (in the nonpipeline case). This possibility
+		# is handled by socketWrQueue later in this command.
+		set reusing 1
+		set sock $socketMapping($state(socketinfo))
+		Log "reusing socket $sock for $state(socketinfo) - token $token"
+
 	    }
+	    # Do not automatically close the connection socket.
+	    set state(connection) {}
 	}
-	# don't automatically close this connection socket
-	set state(connection) {}
     }
+
+    if {$reusing} {
+	# Define state(tmpState) and state(tmpOpenCmd) for use
+	# by http::ReplayIfDead if the persistent connection has died.
+	set state(tmpState) [array get state]
+
+	# Pass -myaddr directly to the socket command
+	if {[info exists state(-myaddr)]} {
+	    lappend sockopts -myaddr $state(-myaddr)
+	}
+
+	set state(tmpOpenCmd) [list {*}$defcmd {*}$sockopts {*}$targetAddr]
+    }
+
+    set state(reusing) $reusing
+    # Excluding ReplayIfDead and the decision whether to call it, there are four
+    # places outside http::geturl where state(reusing) is used:
+    # - Connected   - if reusing and not pipelined, start the state(-timeout)
+    #                 timeout (when writing).
+    # - DoneRequest - if reusing and pipelined, send the next pipelined write
+    # - Event       - if reusing and pipelined, start the state(-timeout)
+    #                 timeout (when reading).
+    # - Event       - if (not reusing) and pipelined, send the next pipelined
+    #                 write
+
+    # See comments above re the start of this timeout in other cases.
+    if {(!$state(reusing)) && ($state(-timeout) > 0)} {
+	set state(after) [after $state(-timeout) \
+		[list http::reset $token timeout]]
+    }
+
     if {![info exists sock]} {
 	# Pass -myaddr directly to the socket command
 	if {[info exists state(-myaddr)]} {
 	    lappend sockopts -myaddr $state(-myaddr)
 	}
-        if {[catch {eval $defcmd $sockopts $targetAddr} sock errdict]} {
-	    # something went wrong while trying to establish the connection.
+	set pre [clock milliseconds]
+	##Log pre socket opened, - token $token
+	##Log [concat $defcmd $sockopts $targetAddr] - token $token
+	if {[catch {eval $defcmd $sockopts $targetAddr} sock errdict]} {
+	    # Something went wrong while trying to establish the connection.
 	    # Clean up after events and such, but DON'T call the command
 	    # callback (if available) because we're going to throw an
 	    # exception from here instead.
 
-	    set state(sock) $sock
-	    Finish $token "" 1
+	    set state(sock) NONE
+	    Finish $token $sock 1
 	    cleanup $token
 	    dict unset errdict -level
 	    return -options $errdict $sock
-        }
+	} else {
+	    # Initialisation of a new socket.
+	    ##Log post socket opened, - token $token
+	    ##Log socket opened, now fconfigure - token $token
+	    set delay [expr {[clock milliseconds] - $pre}]
+	    if {$delay > 3000} {
+		Log socket delay $delay - token $token
+	    }
+	    fconfigure $sock -translation {auto crlf} \
+			     -buffersize $state(-blocksize)
+	    ##Log socket opened, DONE fconfigure - token $token
+	}
     }
+    # Command [socket] is called with -async, but takes 5s to 5.1s to return,
+    # with probability of order 1 in 10,000.  This may be a bizarre scheduling
+    # issue with my (KJN's) system (Fedora Linux).
+    # This does not cause a problem (unless the request times out when this
+    # command returns).
+
     set state(sock) $sock
-    Log "Using $sock for $state(socketinfo)" \
-        [expr {$state(-keepalive)?"keepalive":""}]
-    if {$state(-keepalive)} {
-        set socketmap($state(socketinfo)) $sock
+    Log "Using $sock for $state(socketinfo) - token $token" \
+	[expr {$state(-keepalive)?"keepalive":""}]
+
+    if {    $state(-keepalive)
+	 && (![info exists socketMapping($state(socketinfo))])
+    } {
+	# Freshly-opened socket that we would like to become persistent.
+	set socketMapping($state(socketinfo)) $sock
+
+	if {![info exists socketRdState($state(socketinfo))]} {
+	    set socketRdState($state(socketinfo)) {}
+	    set varName ::http::socketRdState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelReadPipeline
+	}
+	if {![info exists socketWrState($state(socketinfo))]} {
+	    set socketWrState($state(socketinfo)) {}
+	    set varName ::http::socketWrState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelWritePipeline
+	}
+
+	if {$state(-pipeline)} {
+	    #Log new, init for pipelined, GRANT write access to $token in geturl
+	    # Also grant premature read access to the socket. This is OK.
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	} else {
+	    # socketWrState is not used by this non-pipelined transaction.
+	    # We cannot leave it as "Wready" because the next call to
+	    # http::geturl with a pipelined transaction would conclude that the
+	    # socket is available for writing.
+	    #Log new, init for nonpipeline, GRANT r/w access to $token in geturl
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	}
+
+	set socketRdQueue($state(socketinfo)) {}
+	set socketWrQueue($state(socketinfo)) {}
+	set socketClosing($state(socketinfo)) 0
+	set socketPlayCmd($state(socketinfo)) {ReplayIfClose Wready {} {}}
     }
 
     if {![info exists phost]} {
 	set phost ""
     }
-    fileevent $sock writable [list http::Connect $token $proto $phost $srvurl]
+    if {$reusing} {
+	# For use by http::ReplayIfDead if the persistent connection has died.
+	# Also used by NextPipelinedWrite.
+	set state(tmpConnArgs) [list $proto $phost $srvurl]
+    }
+
+    # The element socketWrState($connId) has a value which is either the name of
+    # the token that is permitted to write to the socket, or "Wready" if no
+    # token is permitted to write.
+    #
+    # The code that sets the value to Wready immediately calls
+    # http::NextPipelinedWrite, which examines socketWrQueue($connId) and
+    # processes the next request in the queue, if there is one.  The value
+    # Wready is not found when the interpreter is in the event loop unless the
+    # socket is idle.
+    #
+    # The element socketRdState($connId) has a value which is either the name of
+    # the token that is permitted to read from the socket, or "Rready" if no
+    # token is permitted to read.
+    #
+    # The code that sets the value to Rready then examines
+    # socketRdQueue($connId) and processes the next request in the queue, if
+    # there is one.  The value Rready is not found when the interpreter is in
+    # the event loop unless the socket is idle.
+
+    if {$alreadyQueued} {
+	# A write may or may not be in progress.  There is no need to set
+	# socketWrState to prevent another call stealing write access - all
+	# subsequent calls on this socket will come here because the socket
+	# will close after the current read, and its
+	# socketClosing($connId) is 1.
+	##Log "HTTP request for token $token is queued"
+
+    } elseif {    $reusing
+	       && $state(-pipeline)
+	       && ($socketWrState($state(socketinfo)) ne "Wready")
+    } {
+	##Log "HTTP request for token $token is queued for pipelined use"
+	lappend socketWrQueue($state(socketinfo)) $token
+
+    } elseif {    $reusing
+	       && (!$state(-pipeline))
+	       && ($socketWrState($state(socketinfo)) ne "Wready")
+    } {
+	# A write is queued or in progress.  Lappend to the write queue.
+	##Log "HTTP request for token $token is queued for nonpipeline use"
+	lappend socketWrQueue($state(socketinfo)) $token
+
+    } elseif {    $reusing
+	       && (!$state(-pipeline))
+	       && ($socketWrState($state(socketinfo)) eq "Wready")
+	       && ($socketRdState($state(socketinfo)) ne "Rready")
+    } {
+	# A read is queued or in progress, but not a write.  Cannot start the
+	# nonpipeline transaction, but must set socketWrState to prevent a
+	# pipelined request jumping the queue.
+	##Log "HTTP request for token $token is queued for nonpipeline use"
+	#Log re-use nonpipeline, GRANT delayed write access to $token in geturl
+
+	set socketWrState($state(socketinfo)) peNding
+	lappend socketWrQueue($state(socketinfo)) $token
+
+    } else {
+	if {$reusing && $state(-pipeline)} {
+	    #Log re-use pipelined, GRANT write access to $token in geturl
+	    set socketWrState($state(socketinfo)) $token
+
+	} elseif {$reusing} {
+	    # Cf tests above - both are ready.
+	    #Log re-use nonpipeline, GRANT r/w access to $token in geturl
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	}
+
+	# All (!$reusing) cases come here, and also some $reusing cases if the
+	# connection is ready.
+	#Log ---- $state(socketinfo) << conn to $token for HTTP request (a)
+	# Connect does its own fconfigure.
+	fileevent $sock writable \
+		[list http::Connect $token $proto $phost $srvurl]
+    }
 
     # Wait for the connection to complete.
     if {![info exists state(-command)]} {
@@ -648,7 +1257,7 @@ proc http::geturl {url args} {
 	    return -code error $err
 	}
     }
-
+    ##Log Leaving http::geturl - token $token
     return $token
 }
 
@@ -658,8 +1267,8 @@ proc http::geturl {url args} {
 #	established.
 #
 # Arguments:
-#       token	State token.
-#       proto	What protocol (http, https, etc.) was used to connect.
+#	token	State token.
+#	proto	What protocol (http, https, etc.) was used to connect.
 #	phost	Are we using keep-alive? Non-empty if yes.
 #	srvurl	Service-local URL that we're requesting
 # Results:
@@ -668,11 +1277,24 @@ proc http::geturl {url args} {
 proc http::Connected {token proto phost srvurl} {
     variable http
     variable urlTypes
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
 
     variable $token
     upvar 0 $token state
+    set tk [namespace tail $token]
+
+    if {$state(reusing) && (!$state(-pipeline)) && ($state(-timeout) > 0)} {
+	set state(after) [after $state(-timeout) \
+		[list http::reset $token timeout]]
+    }
 
-    # Set back the variables needed here
+    # Set back the variables needed here.
     set sock $state(sock)
     set isQueryChannel [info exists state(-querychannel)]
     set isQuery [info exists state(-query)]
@@ -682,9 +1304,12 @@ proc http::Connected {token proto phost srvurl} {
     set lower [string tolower $proto]
     set defport [lindex $urlTypes($lower) 0]
 
-    # Send data in cr-lf format, but accept any line terminators
-
-    fconfigure $sock -translation {auto crlf} -buffersize $state(-blocksize)
+    # Send data in cr-lf format, but accept any line terminators.
+    # Initialisation to {auto *} now done in geturl, KeepSocket and DoneRequest.
+    # We are concerned here with the request (write) not the response (read).
+    lassign [fconfigure $sock -translation] trRead trWrite
+    fconfigure $sock -translation [list $trRead crlf] \
+		     -buffersize $state(-blocksize)
 
     # The following is disallowed in safe interpreters, but the socket is
     # already in non-blocking mode in that case.
@@ -707,10 +1332,12 @@ proc http::Connected {token proto phost srvurl} {
 	set how POST
 	# The query channel must be blocking for the async Write to
 	# work properly.
-	fconfigure $state(-querychannel) -blocking 1 -translation binary
+	lassign [fconfigure $sock -translation] trRead trWrite
+	fconfigure $state(-querychannel) -blocking 1 \
+					 -translation [list $trRead binary]
 	set contDone 0
     }
-    if {[info exists state(-method)] && $state(-method) ne ""} {
+    if {[info exists state(-method)] && ($state(-method) ne "")} {
 	set how $state(-method)
     }
     # We cannot handle chunked encodings with -handler, so force HTTP/1.0
@@ -719,7 +1346,11 @@ proc http::Connected {token proto phost srvurl} {
 	set state(-protocol) 1.0
     }
     set accept_types_seen 0
+
+    Log ^B$tk begin sending request - token $token
+
     if {[catch {
+	set state(method) $how
 	puts $sock "$how $srvurl HTTP/$state(-protocol)"
 	if {[dict exists $state(-headers) Host]} {
 	    # Allow Host spoofing. [Bug 928154]
@@ -732,16 +1363,18 @@ proc http::Connected {token proto phost srvurl} {
 	    puts $sock "Host: $host:$port"
 	}
 	puts $sock "User-Agent: $http(-useragent)"
-        if {$state(-protocol) == 1.0 && $state(-keepalive)} {
+	if {($state(-protocol) >= 1.0) && $state(-keepalive)} {
+	    # Send this header, because a 1.1 server is not compelled to treat
+	    # this as the default.
 	    puts $sock "Connection: keep-alive"
-        }
-        if {$state(-protocol) > 1.0 && !$state(-keepalive)} {
+	}
+	if {($state(-protocol) > 1.0) && !$state(-keepalive)} {
 	    puts $sock "Connection: close" ;# RFC2616 sec 8.1.2.1
-        }
-        if {[info exists phost] && ($phost ne "") && $state(-keepalive)} {
+	}
+	if {[info exists phost] && ($phost ne "") && $state(-keepalive)} {
 	    puts $sock "Proxy-Connection: Keep-Alive"
-        }
-        set accept_encoding_seen 0
+	}
+	set accept_encoding_seen 0
 	set content_type_seen 0
 	dict for {key value} $state(-headers) {
 	    set value [string map [list \n "" \r ""] $value]
@@ -771,10 +1404,13 @@ proc http::Connected {token proto phost srvurl} {
 	if {!$accept_types_seen} {
 	    puts $sock "Accept: $state(accept-types)"
 	}
-        if {!$accept_encoding_seen && ![info exists state(-handler)]} {
+	if {    (!$accept_encoding_seen)
+	     && (![info exists state(-handler)])
+	     && $http(-zip)
+	} {
 	    puts $sock "Accept-Encoding: gzip,deflate,compress"
-        }
-	if {$isQueryChannel && $state(querylength) == 0} {
+	}
+	if {$isQueryChannel && ($state(querylength) == 0)} {
 	    # Try to determine size of data in channel. If we cannot seek, the
 	    # surrounding catch will trap us
 
@@ -803,6 +1439,7 @@ proc http::Connected {token proto phost srvurl} {
 	# response.
 
 	if {$isQuery || $isQueryChannel} {
+	    # POST method.
 	    if {!$content_type_seen} {
 		puts $sock "Content-Type: $state(-type)"
 	    }
@@ -810,29 +1447,753 @@ proc http::Connected {token proto phost srvurl} {
 		puts $sock "Content-Length: $state(querylength)"
 	    }
 	    puts $sock ""
-	    fconfigure $sock -translation {auto binary}
+	    flush $sock
+	    # Flush flushes the error in the https case with a bad handshake:
+	    # else the socket never becomes writable again, and hangs until
+	    # timeout (if any).
+
+	    lassign [fconfigure $sock -translation] trRead trWrite
+	    fconfigure $sock -translation [list $trRead binary]
 	    fileevent $sock writable [list http::Write $token]
+	    # The http::Write command decides when to make the socket readable,
+	    # using the same test as the GET/HEAD case below.
 	} else {
+	    # GET or HEAD method.
+	    if {    (![catch {fileevent $sock readable} binding])
+		 && ($binding eq [list http::CheckEof $sock])
+	    } {
+		# Remove the "fileevent readable" binding of an idle persistent
+		# socket to http::CheckEof.  We can no longer treat bytes
+		# received as junk. The server might still time out and
+		# half-close the socket if it has not yet received the first
+		# "puts".
+		fileevent $sock readable {}
+	    }
 	    puts $sock ""
 	    flush $sock
-	    fileevent $sock readable [list http::Event $sock $token]
+	    Log ^C$tk end sending request - token $token
+	    # End of writing (GET/HEAD methods).  The request has been sent.
+
+	    DoneRequest $token
 	}
 
     } err]} {
-	# The socket probably was never connected, or the connection dropped
-	# later.
+	# The socket probably was never connected, OR the connection dropped
+	# later, OR https handshake error, which may be discovered as late as
+	# the "flush" command above...
+	Log "WARNING - if testing, pay special attention to this\
+		case (GI) which is seldom executed - token $token"
+	if {[info exists state(reusing)] && $state(reusing)} {
+	    # The socket was closed at the server end, and closed at
+	    # this end by http::CheckEof.
+    	    if {[TestForReplay $token write $err a]} {
+		return
+	    } else {
+		Finish $token {failed to re-use socket}
+	    }
 
-	# if state(status) is error, it means someone's already called Finish
-	# to do the above-described clean up.
-	if {$state(status) ne "error"} {
+	    # else:
+	    # This is NOT a persistent socket that has been closed since its
+	    # last use.
+	    # If any other requests are in flight or pipelined/queued, they will
+	    # be discarded.
+	} elseif {$state(status) eq ""} {
+	    # ...https handshake errors come here.
+	    set msg [registerError $sock]
+	    registerError $sock {}
+	    if {$msg eq {}} {
+		set msg {failed to use socket}
+	    }
+	    Finish $token $msg
+	} elseif {$state(status) ne "error"} {
 	    Finish $token $err
 	}
     }
 }
 
+# http::registerError
+#
+#	Called (for example when processing TclTLS activity) to register
+#	an error for a connection on a specific socket.  This helps
+#	http::Connected to deliver meaningful error messages, e.g. when a TLS
+#	certificate fails verification.
+#
+#	Usage: http::registerError socket ?newValue?
+#
+#	"set" semantics, except that a "get" (a call without a new value) for a
+#	non-existent socket returns {}, not an error.
+
+proc http::registerError {sock args} {
+    variable registeredErrors
+
+    if {    ([llength $args] == 0)
+	 && (![info exists registeredErrors($sock)])
+    } {
+	return
+    } elseif {    ([llength $args] == 1)
+	       && ([lindex $args 0] eq {})
+    } {
+	unset -nocomplain registeredErrors($sock)
+	return
+    }
+    set registeredErrors($sock) {*}$args
+}
+
+# http::DoneRequest --
+#
+#	Command called when a request has been sent.  It will arrange the
+#	next request and/or response as appropriate.
+#
+#	If this command is called when $socketClosing(*), the request $token
+#	that calls it must be pipelined and destined to fail.
+
+proc http::DoneRequest {token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    set sock $state(sock)
+
+    # If pipelined, connect the next HTTP request to the socket.
+    if {$state(reusing) && $state(-pipeline)} {
+	# Enable next token (if any) to write.
+	# The value "Wready" is set only here, and
+	# in http::Event after reading the response-headers of a
+	# non-reusing transaction.
+	# Previous value is $token. It cannot be pending.
+	set socketWrState($state(socketinfo)) Wready
+
+	# Now ready to write the next pipelined request (if any).
+	http::NextPipelinedWrite $token
+    } else {
+	# If pipelined, this is the first transaction on this socket.  We wait
+	# for the response headers to discover whether the connection is
+	# persistent.  (If this is not done and the connection is not
+	# persistent, we SHOULD retry and then MUST NOT pipeline before knowing
+	# that we have a persistent connection
+	# (rfc2616 8.1.2.2)).
+    }
+
+    # Connect to receive the response, unless the socket is pipelined
+    # and another response is being sent.
+    # This code block is separate from the code below because there are
+    # cases where socketRdState already has the value $token.
+    if {    $state(-keepalive)
+	 && $state(-pipeline)
+	 && [info exists socketRdState($state(socketinfo))]
+	 && ($socketRdState($state(socketinfo)) eq "Rready")
+    } {
+	#Log pipelined, GRANT read access to $token in Connected
+	set socketRdState($state(socketinfo)) $token
+    }
+
+    if {    $state(-keepalive)
+	 && $state(-pipeline)
+	 && [info exists socketRdState($state(socketinfo))]
+	 && ($socketRdState($state(socketinfo)) ne $token)
+    } {
+	# Do not read from the socket until it is ready.
+	##Log "HTTP response for token $token is queued for pipelined use"
+	# If $socketClosing(*), then the caller will be a pipelined write and
+	# execution will come here.
+	# This token has already been recorded as "in flight" for writing.
+	# When the socket is closed, the read queue will be cleared in
+	# CloseQueuedQueries and so the "lappend" here has no effect.
+	lappend socketRdQueue($state(socketinfo)) $token
+    } else {
+	# In the pipelined case, connection for reading depends on the
+	# value of socketRdState.
+	# In the nonpipeline case, connection for reading always occurs.
+	ReceiveResponse $token
+    }
+}
+
+# http::ReceiveResponse
+#
+#	Connects token to its socket for reading.
+
+proc http::ReceiveResponse {token} {
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    set sock $state(sock)
+
+    #Log ---- $state(socketinfo) >> conn to $token for HTTP response
+    lassign [fconfigure $sock -translation] trRead trWrite
+    fconfigure $sock -translation [list auto $trWrite] \
+		     -buffersize $state(-blocksize)
+    Log ^D$tk begin receiving response - token $token
+
+    coroutine ${token}EventCoroutine http::Event $sock $token
+    fileevent $sock readable ${token}EventCoroutine
+}
+
+# http::NextPipelinedWrite
+#
+# - Connecting a socket to a token for writing is done by this command and by
+#   command KeepSocket.
+# - If another request has a pipelined write scheduled for $token's socket,
+#   and if the socket is ready to accept it, connect the write and update
+#   the queue accordingly.
+# - This command is called from http::DoneRequest and http::Event,
+#   IF $state(-pipeline) AND (the current transfer has reached the point at
+#   which the socket is ready for the next request to be written).
+# - This command is called when a token has write access and is pipelined and
+#   keep-alive, and sets socketWrState to Wready.
+# - The command need not consider the case where socketWrState is set to a token
+#   that does not yet have write access.  Such a token is waiting for Rready,
+#   and the assignment of the connection to the token will be done elsewhere (in
+#   http::KeepSocket).
+# - This command cannot be called after socketWrState has been set to a
+#   "pending" token value (that is then overwritten by the caller), because that
+#   value is set by this command when it is called by an earlier token when it
+#   relinquishes its write access, and the pending token is always the next in
+#   line to write.
+
+proc http::NextPipelinedWrite {token} {
+    variable http
+    variable socketRdState
+    variable socketWrState
+    variable socketWrQueue
+    variable socketClosing
+    variable $token
+    upvar 0 $token state
+    set connId $state(socketinfo)
+
+    if {    [info exists socketClosing($connId)]
+	 && $socketClosing($connId)
+    } {
+	# socketClosing(*) is set because the server has sent a
+	# "Connection: close" header.
+	# Behave as if the queues are empty - so do nothing.
+    } elseif {    $state(-pipeline)
+	 && [info exists socketWrState($connId)]
+	 && ($socketWrState($connId) eq "Wready")
+
+	 && [info exists socketWrQueue($connId)]
+	 && [llength $socketWrQueue($connId)]
+	 && ([set token2 [lindex $socketWrQueue($connId) 0]
+	      set ${token2}(-pipeline)
+	     ]
+	    )
+    } {
+	# - The usual case for a pipelined connection, ready for a new request.
+	#Log pipelined, GRANT write access to $token2 in NextPipelinedWrite
+	set conn [set ${token2}(tmpConnArgs)]
+	set socketWrState($connId) $token2
+	set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	# Connect does its own fconfigure.
+	fileevent $state(sock) writable [list http::Connect $token2 {*}$conn]
+	#Log ---- $connId << conn to $token2 for HTTP request (b)
+
+	# In the tests below, the next request will be nonpipeline.
+    } elseif {    $state(-pipeline)
+	       && [info exists socketWrState($connId)]
+	       && ($socketWrState($connId) eq "Wready")
+
+	       && [info exists socketWrQueue($connId)]
+	       && [llength $socketWrQueue($connId)]
+	       && (![ set token3 [lindex $socketWrQueue($connId) 0]
+		      set ${token3}(-pipeline)
+		    ]
+		  )
+
+	       && [info exists socketRdState($connId)]
+	       && ($socketRdState($connId) eq "Rready")
+    } {
+	# The case in which the next request will be non-pipelined, and the read
+	# and write queues is ready: which is the condition for a non-pipelined
+	# write.
+	variable $token3
+	upvar 0 $token3 state3
+	set conn [set ${token3}(tmpConnArgs)]
+	#Log nonpipeline, GRANT r/w access to $token3 in NextPipelinedWrite
+	set socketRdState($connId) $token3
+	set socketWrState($connId) $token3
+	set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	# Connect does its own fconfigure.
+	fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	#Log ---- $state(sock) << conn to $token3 for HTTP request (c)
+
+    } elseif {    $state(-pipeline)
+	 && [info exists socketWrState($connId)]
+	 && ($socketWrState($connId) eq "Wready")
+
+	 && [info exists socketWrQueue($connId)]
+	 && [llength $socketWrQueue($connId)]
+	 && (![set token2 [lindex $socketWrQueue($connId) 0]
+	      set ${token2}(-pipeline)
+	     ]
+	    )
+    } {
+	# - The case in which the next request will be non-pipelined, but the
+	#   read queue is NOT ready.
+	# - A read is queued or in progress, but not a write.  Cannot start the
+	#   nonpipeline transaction, but must set socketWrState to prevent a new
+	#   pipelined request (in http::geturl) jumping the queue.
+	# - Because socketWrState($connId) is not set to Wready, the assignment
+	#   of the connection to $token2 will be done elsewhere - by command
+	#   http::KeepSocket when $socketRdState($connId) is set to "Rready".
+
+	#Log re-use nonpipeline, GRANT delayed write access to $token in NextP..
+	set socketWrState($connId) peNding
+    }
+}
+
+# http::CancelReadPipeline
+#
+#	Cancel pipelined responses on a closing "Keep-Alive" socket.
+#
+#	- Called by a variable trace on "unset socketRdState($connId)".
+#	- The variable relates to a Keep-Alive socket, which has been closed.
+#	- Cancels all pipelined responses. The requests have been sent,
+#	  the responses have not yet been received.
+#	- This is a hard cancel that ends each transaction with error status,
+#	  and closes the connection. Do not use it if you want to replay failed
+#	  transactions.
+#	- N.B. Always delete ::http::socketRdState($connId) before deleting
+#	  ::http::socketRdQueue($connId), or this command will do nothing.
+#
+# Arguments
+#	As for a trace command on a variable.
+
+proc http::CancelReadPipeline {name1 connId op} {
+    variable socketRdQueue
+    ##Log CancelReadPipeline $name1 $connId $op
+    if {[info exists socketRdQueue($connId)]} {
+	set msg {the connection was closed by CancelReadPipeline}
+	foreach token $socketRdQueue($connId) {
+	    set tk [namespace tail $token]
+	    Log ^X$tk end of response "($msg)" - token $token
+	    set ${token}(status) eof
+	    Finish $token ;#$msg
+	}
+	set socketRdQueue($connId) {}
+    }
+}
+
+# http::CancelWritePipeline
+#
+#	Cancel queued events on a closing "Keep-Alive" socket.
+#
+#	- Called by a variable trace on "unset socketWrState($connId)".
+#	- The variable relates to a Keep-Alive socket, which has been closed.
+#	- In pipelined or nonpipeline case: cancels all queued requests.  The
+#	  requests have not yet been sent, the responses are not due.
+#	- This is a hard cancel that ends each transaction with error status,
+#	  and closes the connection. Do not use it if you want to replay failed
+#	  transactions.
+#	- N.B. Always delete ::http::socketWrState($connId) before deleting
+#	  ::http::socketWrQueue($connId), or this command will do nothing.
+#
+# Arguments
+#	As for a trace command on a variable.
+
+proc http::CancelWritePipeline {name1 connId op} {
+    variable socketWrQueue
+
+    ##Log CancelWritePipeline $name1 $connId $op
+    if {[info exists socketWrQueue($connId)]} {
+	set msg {the connection was closed by CancelWritePipeline}
+	foreach token $socketWrQueue($connId) {
+	    set tk [namespace tail $token]
+	    Log ^X$tk end of response "($msg)" - token $token
+	    set ${token}(status) eof
+	    Finish $token ;#$msg
+	}
+	set socketWrQueue($connId) {}
+    }
+}
+
+# http::ReplayIfDead --
+#
+# - A query on a re-used persistent socket failed at the earliest opportunity,
+#   because the socket had been closed by the server.  Keep the token, tidy up,
+#   and try to connect on a fresh socket.
+# - The connection is monitored for eof by the command http::CheckEof.  Thus
+#   http::ReplayIfDead is needed only when a server event (half-closing an
+#   apparently idle connection), and a client event (sending a request) occur at
+#   almost the same time, and neither client nor server detects the other's
+#   action before performing its own (an "asynchronous close event").
+# - To simplify testing of http::ReplayIfDead, set TEST_EOF 1 in
+#   http::KeepSocket, and then http::ReplayIfDead will be called if http::geturl
+#   is called at any time after the server timeout.
+#
+# Arguments:
+#	token	Connection token.
+#
+# Side Effects:
+#	Use the same token, but try to open a new socket.
+
+proc http::ReplayIfDead {tokenArg doing} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $tokenArg
+    upvar 0 $tokenArg stateArg
+
+    Log running http::ReplayIfDead for $tokenArg $doing
+
+    # 1. Merge the tokens for transactions in flight, the read (response) queue,
+    #    and the write (request) queue.
+
+    set InFlightR {}
+    set InFlightW {}
+
+    # Obtain the tokens for transactions in flight.
+    if {$stateArg(-pipeline)} {
+	# Two transactions may be in flight.  The "read" transaction was first.
+	# It is unlikely that the server would close the socket if a response
+	# was pending; however, an earlier request (as well as the present
+	# request) may have been sent and ignored if the socket was half-closed
+	# by the server.
+
+	if {    [info exists socketRdState($stateArg(socketinfo))]
+	     && ($socketRdState($stateArg(socketinfo)) ne "Rready")
+	} {
+	    lappend InFlightR $socketRdState($stateArg(socketinfo))
+	} elseif {($doing eq "read")} {
+	    lappend InFlightR $tokenArg
+	}
+
+	if {    [info exists socketWrState($stateArg(socketinfo))]
+	     && $socketWrState($stateArg(socketinfo)) ni {Wready peNding}
+	} {
+	    lappend InFlightW $socketWrState($stateArg(socketinfo))
+	} elseif {($doing eq "write")} {
+	    lappend InFlightW $tokenArg
+	}
+
+	# Report any inconsistency of $tokenArg with socket*state.
+	if {    ($doing eq "read")
+	     && [info exists socketRdState($stateArg(socketinfo))]
+	     && ($tokenArg ne $socketRdState($stateArg(socketinfo)))
+	} {
+	    Log WARNING - ReplayIfDead pipelined tokenArg $tokenArg $doing \
+		    ne socketRdState($stateArg(socketinfo)) \
+		      $socketRdState($stateArg(socketinfo))
+
+	} elseif {
+		($doing eq "write")
+	     && [info exists socketWrState($stateArg(socketinfo))]
+	     && ($tokenArg ne $socketWrState($stateArg(socketinfo)))
+	} {
+	    Log WARNING - ReplayIfDead pipelined tokenArg $tokenArg $doing \
+		    ne socketWrState($stateArg(socketinfo)) \
+		      $socketWrState($stateArg(socketinfo))
+	}
+    } else {
+	# One transaction should be in flight.
+	# socketRdState, socketWrQueue are used.
+	# socketRdQueue should be empty.
+
+	# Report any inconsistency of $tokenArg with socket*state.
+	if {$tokenArg ne $socketRdState($stateArg(socketinfo))} {
+	    Log WARNING - ReplayIfDead nonpipeline tokenArg $tokenArg $doing \
+		    ne socketRdState($stateArg(socketinfo)) \
+		      $socketRdState($stateArg(socketinfo))
+	}
+
+	# Report the inconsistency that socketRdQueue is non-empty.
+	if {    [info exists socketRdQueue($stateArg(socketinfo))]
+	     && ($socketRdQueue($stateArg(socketinfo)) ne {})
+	} {
+	    Log WARNING - ReplayIfDead nonpipeline tokenArg $tokenArg $doing \
+		    has read queue socketRdQueue($stateArg(socketinfo)) \
+		    $socketRdQueue($stateArg(socketinfo)) ne {}
+	}
+
+	lappend InFlightW $socketRdState($stateArg(socketinfo))
+	set socketRdQueue($stateArg(socketinfo)) {}
+    }
+
+    set newQueue {}
+    lappend newQueue {*}$InFlightR
+    lappend newQueue {*}$socketRdQueue($stateArg(socketinfo))
+    lappend newQueue {*}$InFlightW
+    lappend newQueue {*}$socketWrQueue($stateArg(socketinfo))
+
+
+    # 2. Tidy up tokenArg.  This is a cut-down form of Finish/CloseSocket.
+    #    Do not change state(status).
+    #    No need to after cancel stateArg(after) - either this is done in
+    #    ReplayCore/ReInit, or Finish is called.
+
+    catch {close $stateArg(sock)}
+
+    # 2a. Tidy the tokens in the queues - this is done in ReplayCore/ReInit.
+    # - Transactions, if any, that are awaiting responses cannot be completed.
+    #   They are listed for re-sending in newQueue.
+    # - All tokens are preserved for re-use by ReplayCore, and their variables
+    #   will be re-initialised by calls to ReInit.
+    # - The relevant element of socketMapping, socketRdState, socketWrState,
+    #   socketRdQueue, socketWrQueue, socketClosing, socketPlayCmd will be set
+    #   to new values in ReplayCore.
+
+    ReplayCore $newQueue
+}
+
+# http::ReplayIfClose --
+#
+#	A request on a socket that was previously "Connection: keep-alive" has
+#	received a "Connection: close" response header.  The server supplies
+#	that response correctly, but any later requests already queued on this
+#	connection will be lost when the socket closes.
+#
+#	This command takes arguments that represent the socketWrState,
+#	socketRdQueue and socketWrQueue for this connection.  The socketRdState
+#	is not needed because the server responds in full to the request that
+#	received the "Connection: close" response header.
+#
+#	Existing request tokens $token (::http::$n) are preserved.  The caller
+#	will be unaware that the request was processed this way.
+
+proc http::ReplayIfClose {Wstate Rqueue Wqueue} {
+    Log running http::ReplayIfClose for $Wstate $Rqueue $Wqueue
+
+    if {$Wstate in $Rqueue || $Wstate in $Wqueue} {
+	Log WARNING duplicate token in http::ReplayIfClose - token $Wstate
+	set Wstate Wready
+    }
+
+    # 1. Create newQueue
+    set InFlightW {}
+    if {$Wstate ni {Wready peNding}} {
+	lappend InFlightW $Wstate
+    }
+
+    set newQueue {}
+    lappend newQueue {*}$Rqueue
+    lappend newQueue {*}$InFlightW
+    lappend newQueue {*}$Wqueue
+
+    # 2. Cleanup - none needed, done by the caller.
+
+    ReplayCore $newQueue
+}
+
+# http::ReInit --
+#
+#	Command to restore a token's state to a condition that
+#	makes it ready to replay a request.
+#
+#	Command http::geturl stores extra state in state(tmp*) so
+#	we don't need to do the argument processing again.
+#
+#	The caller must:
+#	- Set state(reusing) and state(sock) to their new values after calling
+#	  this command.
+#	- Unset state(tmpState), state(tmpOpenCmd) if future calls to ReplayCore
+#	  or ReInit are inappropriate for this token. Typically only one retry
+#	  is allowed.
+#	The caller may also unset state(tmpConnArgs) if this value (and the
+#	token) will be used immediately.  The value is needed by tokens that
+#	will be stored in a queue.
+#
+# Arguments:
+#	token	Connection token.
+#
+# Return Value: (boolean) true iff the re-initialisation was successful.
+
+proc http::ReInit {token} {
+    variable $token
+    upvar 0 $token state
+
+    if {!(
+	      [info exists state(tmpState)]
+	   && [info exists state(tmpOpenCmd)]
+	   && [info exists state(tmpConnArgs)]
+	 )
+    } {
+	Log FAILED in http::ReInit via ReplayCore - NO tmp vars for $token
+	return 0
+    }
+
+    if {[info exists state(after)]} {
+	after cancel $state(after)
+	unset state(after)
+    }
+
+    # Don't alter state(status) - this would trigger http::wait if it is in use.
+    set tmpState    $state(tmpState)
+    set tmpOpenCmd  $state(tmpOpenCmd)
+    set tmpConnArgs $state(tmpConnArgs)
+    foreach name [array names state] {
+	if {$name ne "status"} {
+	    unset state($name)
+	}
+    }
+
+    # Don't alter state(status).
+    # Restore state(tmp*) - the caller may decide to unset them.
+    # Restore state(tmpConnArgs) which is needed for connection.
+    # state(tmpState), state(tmpOpenCmd) are needed only for retries.
+
+    dict unset tmpState status
+    array set state $tmpState
+    set state(tmpState)    $tmpState
+    set state(tmpOpenCmd)  $tmpOpenCmd
+    set state(tmpConnArgs) $tmpConnArgs
+
+    return 1
+}
+
+# http::ReplayCore --
+#
+#	Command to replay a list of requests, using existing connection tokens.
+#
+#	Abstracted from http::geturl which stores extra state in state(tmp*) so
+#	we don't need to do the argument processing again.
+#
+# Arguments:
+#	newQueue	List of connection tokens.
+#
+# Side Effects:
+#	Use existing tokens, but try to open a new socket.
+
+proc http::ReplayCore {newQueue} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    if {[llength $newQueue] == 0} {
+	# Nothing to do.
+	return
+    }
+
+    ##Log running ReplayCore for {*}$newQueue
+    set newToken [lindex $newQueue 0]
+    set newQueue [lrange $newQueue 1 end]
+
+    # 3. Use newToken, and restore its values of state(*).  Do not restore
+    #    elements tmp* - we try again only once.
+
+    set token $newToken
+    variable $token
+    upvar 0 $token state
+
+    if {![ReInit $token]} {
+	Log FAILED in http::ReplayCore - NO tmp vars
+	Finish $token {cannot send this request again}
+	return
+    }
+
+    set tmpState    $state(tmpState)
+    set tmpOpenCmd  $state(tmpOpenCmd)
+    set tmpConnArgs $state(tmpConnArgs)
+    unset state(tmpState)
+    unset state(tmpOpenCmd)
+    unset state(tmpConnArgs)
+
+    set state(reusing) 0
+
+    if {$state(-timeout) > 0} {
+	set resetCmd [list http::reset $token timeout]
+	set state(after) [after $state(-timeout) $resetCmd]
+    }
+
+    set pre [clock milliseconds]
+    ##Log pre socket opened, - token $token
+    ##Log $tmpOpenCmd - token $token
+    # 4. Open a socket.
+    if {[catch {eval $tmpOpenCmd} sock]} {
+	# Something went wrong while trying to establish the connection.
+	Log FAILED - $sock
+	set state(sock) NONE
+	Finish $token $sock
+	return
+    }
+    ##Log post socket opened, - token $token
+    set delay [expr {[clock milliseconds] - $pre}]
+    if {$delay > 3000} {
+	Log socket delay $delay - token $token
+    }
+    # Command [socket] is called with -async, but takes 5s to 5.1s to return,
+    # with probability of order 1 in 10,000.  This may be a bizarre scheduling
+    # issue with my (KJN's) system (Fedora Linux).
+    # This does not cause a problem (unless the request times out when this
+    # command returns).
+
+    # 5. Configure the persistent socket data.
+    if {$state(-keepalive)} {
+	set socketMapping($state(socketinfo)) $sock
+
+	if {![info exists socketRdState($state(socketinfo))]} {
+	    set socketRdState($state(socketinfo)) {}
+	    set varName ::http::socketRdState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelReadPipeline
+	}
+
+	if {![info exists socketWrState($state(socketinfo))]} {
+	    set socketWrState($state(socketinfo)) {}
+	    set varName ::http::socketWrState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelWritePipeline
+	}
+
+	if {$state(-pipeline)} {
+	    #Log new, init for pipelined, GRANT write acc to $token ReplayCore
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	} else {
+	    #Log new, init for nonpipeline, GRANT r/w acc to $token ReplayCore
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	}
+
+	set socketRdQueue($state(socketinfo)) {}
+	set socketWrQueue($state(socketinfo)) $newQueue
+	set socketClosing($state(socketinfo)) 0
+	set socketPlayCmd($state(socketinfo)) {ReplayIfClose Wready {} {}}
+    }
+
+    ##Log pre newQueue ReInit, - token $token
+    # 6. Configure sockets in the queue.
+    foreach tok $newQueue {
+	if {[ReInit $tok]} {
+	    set ${tok}(reusing) 1
+	    set ${tok}(sock) $sock
+	} else {
+	    set ${tok}(reusing) 1
+	    set ${tok}(sock) NONE
+	    Finish $token {cannot send this request again}
+	}
+    }
+
+    # 7. Configure the socket for newToken to send a request.
+    set state(sock) $sock
+    Log "Using $sock for $state(socketinfo) - token $token" \
+	[expr {$state(-keepalive)?"keepalive":""}]
+
+    # Initialisation of a new socket.
+    ##Log socket opened, now fconfigure - token $token
+    fconfigure $sock -translation {auto crlf} -buffersize $state(-blocksize)
+    ##Log socket opened, DONE fconfigure - token $token
+
+    # Connect does its own fconfigure.
+    fileevent $sock writable [list http::Connect $token {*}$tmpConnArgs]
+    #Log ---- $sock << conn to $token for HTTP request (e)
+}
+
 # Data access functions:
 # Data - the URL data
-# Status - the transaction status: ok, reset, eof, timeout
+# Status - the transaction status: ok, reset, eof, timeout, error
 # Code - the HTTP transaction code, e.g., 200
 # Size - the size of the URL data
 
@@ -895,6 +2256,13 @@ proc http::error {token} {
 proc http::cleanup {token} {
     variable $token
     upvar 0 $token state
+    if {[info commands ${token}EventCoroutine] ne {}} {
+	rename ${token}EventCoroutine {}
+    }
+    if {[info exists state(after)]} {
+	after cancel $state(after)
+	unset state(after)
+    }
     if {[info exists state]} {
 	unset state
     }
@@ -914,17 +2282,33 @@ proc http::cleanup {token} {
 proc http::Connect {token proto phost srvurl} {
     variable $token
     upvar 0 $token state
+    set tk [namespace tail $token]
     set err "due to unexpected EOF"
     if {
 	[eof $state(sock)] ||
 	[set err [fconfigure $state(sock) -error]] ne ""
     } {
+	Log "WARNING - if testing, pay special attention to this\
+		case (GJ) which is seldom executed - token $token"
+	if {[info exists state(reusing)] && $state(reusing)} {
+	    # The socket was closed at the server end, and closed at
+	    # this end by http::CheckEof.
+	    if {[TestForReplay $token write $err b]} {
+		return
+	    }
+
+	    # else:
+	    # This is NOT a persistent socket that has been closed since its
+	    # last use.
+	    # If any other requests are in flight or pipelined/queued, they will
+	    # be discarded.
+	}
 	Finish $token "connect failed $err"
     } else {
+	set state(state) connecting
 	fileevent $state(sock) writable {}
 	::http::Connected $token $proto $phost $srvurl
     }
-    return
 }
 
 # http::Write
@@ -938,8 +2322,18 @@ proc http::Connect {token proto phost srvurl} {
 #	Write the socket and handle callbacks.
 
 proc http::Write {token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
     variable $token
     upvar 0 $token state
+    set tk [namespace tail $token]
     set sock $state(sock)
 
     # Output a block.  Tcl will buffer this if the socket blocks
@@ -950,7 +2344,21 @@ proc http::Write {token} {
 	if {[info exists state(-query)]} {
 	    # Chop up large query strings so queryprogress callback can give
 	    # smooth feedback.
-
+	    if {    $state(queryoffset) + $state(-queryblocksize)
+		 >= $state(querylength)
+	    } {
+		# This will be the last puts for the request-body.
+		if {    (![catch {fileevent $sock readable} binding])
+		     && ($binding eq [list http::CheckEof $sock])
+		} {
+		    # Remove the "fileevent readable" binding of an idle
+		    # persistent socket to http::CheckEof.  We can no longer
+		    # treat bytes received as junk. The server might still time
+		    # out and half-close the socket if it has not yet received
+		    # the first "puts".
+		    fileevent $sock readable {}
+		}
+	    }
 	    puts -nonewline $sock \
 		[string range $state(-query) $state(queryoffset) \
 		     [expr {$state(queryoffset) + $state(-queryblocksize) - 1}]]
@@ -963,6 +2371,19 @@ proc http::Write {token} {
 	    # Copy blocks from the query channel
 
 	    set outStr [read $state(-querychannel) $state(-queryblocksize)]
+	    if {[eof $state(-querychannel)]} {
+		# This will be the last puts for the request-body.
+		if {    (![catch {fileevent $sock readable} binding])
+		     && ($binding eq [list http::CheckEof $sock])
+		} {
+		    # Remove the "fileevent readable" binding of an idle
+		    # persistent socket to http::CheckEof.  We can no longer
+		    # treat bytes received as junk. The server might still time
+		    # out and half-close the socket if it has not yet received
+		    # the first "puts".
+		    fileevent $sock readable {}
+		}
+	    }
 	    puts -nonewline $sock $outStr
 	    incr state(queryoffset) [string length $outStr]
 	    if {[eof $state(-querychannel)]} {
@@ -976,10 +2397,14 @@ proc http::Write {token} {
 	set state(posterror) $err
 	set done 1
     }
+
     if {$done} {
 	catch {flush $sock}
 	fileevent $sock writable {}
-	fileevent $sock readable [list http::Event $sock $token]
+	Log ^C$tk end sending request - token $token
+	# End of writing (POST method).  The request has been sent.
+
+	DoneRequest $token
     }
 
     # Callback to the client after we've completely handled everything.
@@ -992,7 +2417,9 @@ proc http::Write {token} {
 
 # http::Event
 #
-#	Handle input on the socket
+#	Handle input on the socket. This command is the core of
+#	the coroutine commands ${token}EventCoroutine that are
+#	bound to "fileevent $sock readable" and process input.
 #
 # Arguments
 #	sock	The socket receiving input.
@@ -1002,196 +2429,532 @@ proc http::Write {token} {
 #	Read the socket and handle callbacks.
 
 proc http::Event {sock token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
     variable $token
     upvar 0 $token state
+    set tk [namespace tail $token]
+    while 1 {
+	yield
+	##Log Event call - token $token
 
-    if {![info exists state]} {
-	Log "Event $sock with invalid token '$token' - remote close?"
-	if {![eof $sock]} {
-	    if {[set d [read $sock]] ne ""} {
-		Log "WARNING: additional data left on closed socket"
+	if {![info exists state]} {
+	    Log "Event $sock with invalid token '$token' - remote close?"
+	    if {![eof $sock]} {
+		if {[set d [read $sock]] ne ""} {
+		    Log "WARNING: additional data left on closed socket\
+			    - token $token"
+		}
 	    }
+	    Log ^X$tk end of response (token error) - token $token
+	    CloseSocket $sock
+	    return
 	}
-	CloseSocket $sock
-	return
-    }
-    if {$state(state) eq "connecting"} {
-	if {[catch {gets $sock state(http)} n]} {
-	    return [Finish $token $n]
-	} elseif {$n >= 0} {
-	    set state(state) "header"
-	}
-    } elseif {$state(state) eq "header"} {
-	if {[catch {gets $sock line} n]} {
-	    return [Finish $token $n]
-	} elseif {$n == 0} {
-	    # We have now read all headers
-	    # We ignore HTTP/1.1 100 Continue returns. RFC2616 sec 8.2.3
-	    if {$state(http) == "" || ([regexp {^\S+\s(\d+)} $state(http) {} x] && $x == 100)} {
-		set state(state) "connecting"
-		return
+	if {$state(state) eq "connecting"} {
+	    ##Log - connecting - token $token
+	    if {    $state(reusing)
+		 && $state(-pipeline)
+		 && ($state(-timeout) > 0)
+		 && (![info exists state(after)])
+	    } {
+		set state(after) [after $state(-timeout) \
+			[list http::reset $token timeout]]
 	    }
 
-	    set state(state) body
+	    if {[catch {gets $sock state(http)} nsl]} {
+		Log "WARNING - if testing, pay special attention to this\
+			case (GK) which is seldom executed - token $token"
+		if {[info exists state(reusing)] && $state(reusing)} {
+		    # The socket was closed at the server end, and closed at
+		    # this end by http::CheckEof.
 
-	    # If doing a HEAD, then we won't get any body
-	    if {$state(-validate)} {
-		Eof $token
-		return
-	    }
+		    if {[TestForReplay $token read $nsl c]} {
+			return
+		    }
 
-	    # For non-chunked transfer we may have no body - in this case we
-	    # may get no further file event if the connection doesn't close
-	    # and no more data is sent. We can tell and must finish up now -
-	    # not later.
-	    if {
-		!(([info exists state(connection)]
-			&& ($state(connection) eq "close"))
-		    || [info exists state(transfer)])
-		&& ($state(totalsize) == 0)
+		    # else:
+		    # This is NOT a persistent socket that has been closed since
+		    # its last use.
+		    # If any other requests are in flight or pipelined/queued,
+		    # they will be discarded.
+		} else {
+		    Log ^X$tk end of response (error) - token $token
+		    Finish $token $nsl
+		    return
+		}
+	    } elseif {$nsl >= 0} {
+		##Log - connecting 1 - token $token
+		set state(state) "header"
+	    } elseif {    [eof $sock]
+		       && [info exists state(reusing)]
+		       && $state(reusing)
 	    } {
-		Log "body size is 0 and no events likely - complete."
-		Eof $token
-		return
-	    }
+		# The socket was closed at the server end, and we didn't notice.
+		# This is the first read - where the closure is usually first
+		# detected.
 
-	    # We have to use binary translation to count bytes properly.
-	    fconfigure $sock -translation binary
+		if {[TestForReplay $token read {} d]} {
+		    return
+		}
 
-	    if {
-		$state(-binary) || [IsBinaryContentType $state(type)]
-	    } {
-		# Turn off conversions for non-text data
-		set state(binary) 1
+		# else:
+		# This is NOT a persistent socket that has been closed since its
+		# last use.
+		# If any other requests are in flight or pipelined/queued, they
+		# will be discarded.
 	    }
-	    if {[info exists state(-channel)]} {
-		if {$state(binary) || [llength [ContentEncoding $token]]} {
-		    fconfigure $state(-channel) -translation binary
+	} elseif {$state(state) eq "header"} {
+	    if {[catch {gets $sock line} nhl]} {
+		##Log header failed - token $token
+		Log ^X$tk end of response (error) - token $token
+		Finish $token $nhl
+		return
+	    } elseif {$nhl == 0} {
+		##Log header done - token $token
+		Log ^E$tk end of response headers - token $token
+		# We have now read all headers
+		# We ignore HTTP/1.1 100 Continue returns. RFC2616 sec 8.2.3
+		if {    ($state(http) == "")
+		     || ([regexp {^\S+\s(\d+)} $state(http) {} x] && $x == 100)
+		} {
+		    set state(state) "connecting"
+		    continue
+		    # This was a "return" in the pre-coroutine code.
 		}
-		if {![info exists state(-handler)]} {
-		    # Initiate a sequence of background fcopies
-		    fileevent $sock readable {}
-		    CopyStart $sock $token
-		    return
+
+		if {    ([info exists state(connection)])
+		     && ([info exists socketMapping($state(socketinfo))])
+		     && ($state(connection) eq "keep-alive")
+		     && ($state(-keepalive))
+		     && (!$state(reusing))
+		     && ($state(-pipeline))
+		} {
+		    # Response headers received for first request on a
+		    # persistent socket.  Now ready for pipelined writes (if
+		    # any).
+		    # Previous value is $token. It cannot be "pending".
+		    set socketWrState($state(socketinfo)) Wready
+		    http::NextPipelinedWrite $token
 		}
-	    }
-	} elseif {$n > 0} {
-	    # Process header lines
-	    if {[regexp -nocase {^([^:]+):(.+)$} $line x key value]} {
-		switch -- [string tolower $key] {
-		    content-type {
-			set state(type) [string trim [string tolower $value]]
-			# grab the optional charset information
-			if {[regexp -nocase \
-				 {charset\s*=\s*\"((?:[^""]|\\\")*)\"} \
-				 $state(type) -> cs]} {
-			    set state(charset) [string map {{\"} \"} $cs]
+
+		# Once a "close" has been signaled, the client MUST NOT send any
+		# more requests on that connection.
+		#
+		# If either the client or the server sends the "close" token in
+		# the Connection header, that request becomes the last one for
+		# the connection.
+
+		if {    ([info exists state(connection)])
+		     && ([info exists socketMapping($state(socketinfo))])
+		     && ($state(connection) eq "close")
+		     && ($state(-keepalive))
+		} {
+		    # The server warns that it will close the socket after this
+		    # response.
+		    ##Log WARNING - socket will close after response for $token
+		    # Prepare data for a call to ReplayIfClose.
+		    if {    ($socketRdQueue($state(socketinfo)) ne {})
+			 || ($socketWrQueue($state(socketinfo)) ne {})
+			 || ($socketWrState($state(socketinfo)) ni
+						[list Wready peNding $token])
+		    } {
+			set InFlightW $socketWrState($state(socketinfo))
+			if {$InFlightW in [list Wready peNding $token]} {
+			    set InFlightW Wready
 			} else {
-			    regexp -nocase {charset\s*=\s*(\S+?);?} \
-				$state(type) -> state(charset)
+			    set msg "token ${InFlightW} is InFlightW"
+			    ##Log $msg - token $token
 			}
+
+			set socketPlayCmd($state(socketinfo)) \
+				[list ReplayIfClose $InFlightW \
+				$socketRdQueue($state(socketinfo)) \
+				$socketWrQueue($state(socketinfo))]
+
+			# - All tokens are preserved for re-use by ReplayCore.
+			# - Queues are preserved in case of Finish with error,
+			#   but are not used for anything else because
+			#   socketClosing(*) is set below.
+			# - Cancel the state(after) timeout events.
+			foreach tokenVal $socketRdQueue($state(socketinfo)) {
+			    if {[info exists ${tokenVal}(after)]} {
+				after cancel [set ${tokenVal}(after)]
+				unset ${tokenVal}(after)
+			    }
+			}
+
+		    } else {
+			set socketPlayCmd($state(socketinfo)) \
+				{ReplayIfClose Wready {} {}}
 		    }
-		    content-length {
-			set state(totalsize) [string trim $value]
-		    }
-		    content-encoding {
-			set state(coding) [string trim $value]
+
+		    # Do not allow further connections on this socket.
+		    set socketClosing($state(socketinfo)) 1
+		}
+
+		set state(state) body
+
+		# If doing a HEAD, then we won't get any body
+		if {$state(-validate)} {
+		    Log ^F$tk end of response for HEAD request - token $token
+		    set state(state) complete
+		    Eot $token
+		    return
+		}
+
+		# - For non-chunked transfer we may have no body - in this case
+		#   we may get no further file event if the connection doesn't
+		#   close and no more data is sent. We can tell and must finish
+		#   up now - not later - the alternative would be to wait until
+		#   the server times out.
+		# - In this case, the server has NOT told the client it will
+		#   close the connection, AND it has NOT indicated the resource
+		#   length EITHER by setting the Content-Length (totalsize) OR
+		#   by using chunked Transfer-Encoding.
+		# - Do not worry here about the case (Connection: close) because
+		#   the server should close the connection.
+		# - IF (NOT Connection: close) AND (NOT chunked encoding) AND
+		#      (totalsize == 0).
+
+		if {    (!(    [info exists state(connection)]
+			    && ($state(connection) eq "close")
+			  )
+			)
+		     && (![info exists state(transfer)])
+		     && ($state(totalsize) == 0)
+		} {
+		    set msg {body size is 0 and no events likely - complete}
+		    Log "$msg - token $token"
+		    set msg {(length unknown, set to 0)}
+		    Log ^F$tk end of response body {*}$msg - token $token
+		    set state(state) complete
+		    Eot $token
+		    return
+		}
+
+		# We have to use binary translation to count bytes properly.
+		lassign [fconfigure $sock -translation] trRead trWrite
+		fconfigure $sock -translation [list binary $trWrite]
+
+		if {
+		    $state(-binary) || [IsBinaryContentType $state(type)]
+		} {
+		    # Turn off conversions for non-text data.
+		    set state(binary) 1
+		}
+		if {[info exists state(-channel)]} {
+		    if {$state(binary) || [llength [ContentEncoding $token]]} {
+			fconfigure $state(-channel) -translation binary
 		    }
-		    transfer-encoding {
-			set state(transfer) \
-			    [string trim [string tolower $value]]
+		    if {![info exists state(-handler)]} {
+			# Initiate a sequence of background fcopies.
+			fileevent $sock readable {}
+			rename ${token}EventCoroutine {}
+			CopyStart $sock $token
+			return
 		    }
-		    proxy-connection -
-		    connection {
-			set state(connection) \
-			    [string trim [string tolower $value]]
+		}
+	    } elseif {$nhl > 0} {
+		# Process header lines.
+		##Log header - token $token - $line
+		if {[regexp -nocase {^([^:]+):(.+)$} $line x key value]} {
+		    switch -- [string tolower $key] {
+			content-type {
+			    set state(type) [string trim [string tolower $value]]
+			    # Grab the optional charset information.
+			    if {[regexp -nocase \
+				    {charset\s*=\s*\"((?:[^""]|\\\")*)\"} \
+				    $state(type) -> cs]} {
+				set state(charset) [string map {{\"} \"} $cs]
+			    } else {
+				regexp -nocase {charset\s*=\s*(\S+?);?} \
+					$state(type) -> state(charset)
+			    }
+			}
+			content-length {
+			    set state(totalsize) [string trim $value]
+			}
+			content-encoding {
+			    set state(coding) [string trim $value]
+			}
+			transfer-encoding {
+			    set state(transfer) \
+				    [string trim [string tolower $value]]
+			}
+			proxy-connection -
+			connection {
+			    set state(connection) \
+				    [string trim [string tolower $value]]
+			}
 		    }
+		    lappend state(meta) $key [string trim $value]
 		}
-		lappend state(meta) $key [string trim $value]
 	    }
-	}
-    } else {
-	# Now reading body
-	if {[catch {
-	    if {[info exists state(-handler)]} {
-		set n [eval $state(-handler) [list $sock $token]]
-	    } elseif {[info exists state(transfer_final)]} {
-		set line [getTextLine $sock]
-		set n [string length $line]
-		if {$n > 0} {
-		    Log "found $n bytes following final chunk"
-		    append state(transfer_final) $line
-		} else {
-		    Log "final chunk part"
-		    Eof $token
-		}
-	    } elseif {
-		[info exists state(transfer)]
-		&& $state(transfer) eq "chunked"
-	    } {
-		set size 0
-		set chunk [getTextLine $sock]
-		set n [string length $chunk]
-		if {[string trim $chunk] ne ""} {
-		    scan $chunk %x size
-		    if {$size != 0} {
-			set bl [fconfigure $sock -blocking]
-			fconfigure $sock -blocking 1
-			set chunk [read $sock $size]
-			fconfigure $sock -blocking $bl
-			set n [string length $chunk]
-			if {$n >= 0} {
-			    append state(body) $chunk
+	} else {
+	    # Now reading body
+	    ##Log body - token $token
+	    if {[catch {
+		if {[info exists state(-handler)]} {
+		    set n [eval $state(-handler) [list $sock $token]]
+		    ##Log handler $n - token $token
+		    # N.B. the protocol has been set to 1.0 because the -handler
+		    # logic is not expected to handle chunked encoding.
+		    # FIXME Allow -handler with 1.1 on dechunked stacked chan.
+		    if {$state(totalsize) == 0} {
+			# We know the transfer is complete only when the server
+			# closes the connection - i.e. eof is not an error.
+			set state(state) complete
+		    }
+		    if {![string is integer -strict $n]} {
+			if 1 {
+			    # Do not tolerate bad -handler - fail with error
+			    # status.
+			    set msg {the -handler command for http::geturl must\
+				    return an integer (the number of bytes\
+				    read)}
+			    Log ^X$tk end of response (handler error) -\
+				    token $token
+			    Eot $token $msg
+			} else {
+			    # Tolerate the bad -handler, and continue.  The
+			    # penalty:
+			    # (a) Because the handler returns nonsense, we know
+			    #     the transfer is complete only when the server
+			    #     closes the connection - i.e. eof is not an
+			    #     error.
+			    # (b) http::size will not be accurate.
+			    # (c) The transaction is already downgraded to 1.0
+			    #     to avoid chunked transfer encoding.  It MUST
+			    #     also be forced to "Connection: close" or the
+			    #     HTTP/1.0 equivalent; or it MUST fail (as
+			    #     above) if the server sends
+			    #     "Connection: keep-alive" or the HTTP/1.0
+			    #     equivalent.
+			    set n 0
+			    set state(state) complete
 			}
-			if {$size != [string length $chunk]} {
-			    Log "WARNING: mis-sized chunk:\
-				was [string length $chunk], should be $size"
+		    }
+		} elseif {[info exists state(transfer_final)]} {
+		    # This code forgives EOF in place of the final CRLF.
+		    set line [getTextLine $sock]
+		    set n [string length $line]
+		    set state(state) complete
+		    if {$n > 0} {
+			# - HTTP trailers (late response headers) are permitted
+			#   by Chunked Transfer-Encoding, and can be safely
+			#   ignored.
+			# - Do not count these bytes in the total received for
+			#   the response body.
+			Log "trailer of $n bytes after final chunk -\
+				token $token"
+			append state(transfer_final) $line
+			set n 0
+		    } else {
+			Log ^F$tk end of response body (chunked) - token $token
+			Log "final chunk part - token $token"
+			Eot $token
+		    }
+		} elseif {    [info exists state(transfer)]
+			   && ($state(transfer) eq "chunked")
+		} {
+		    ##Log chunked - token $token
+		    set size 0
+		    set hexLenChunk [getTextLine $sock]
+		    #set ntl [string length $hexLenChunk]
+		    if {[string trim $hexLenChunk] ne ""} {
+			scan $hexLenChunk %x size
+			if {$size != 0} {
+			    ##Log chunk-measure $size - token $token
+			    set chunk [BlockingRead $sock $size]
+			    set n [string length $chunk]
+			    if {$n >= 0} {
+				append state(body) $chunk
+				incr state(log_size) [string length $chunk]
+				##Log chunk $n cumul $state(log_size) -\
+					token $token
+			    }
+			    if {$size != [string length $chunk]} {
+				Log "WARNING: mis-sized chunk:\
+				    was [string length $chunk], should be\
+				    $size - token $token"
+				set n 0
+				set state(connection) close
+				Log ^X$tk end of response (chunk error) \
+					- token $token
+				set msg {error in chunked encoding - fetch\
+					terminated}
+				Eot $token $msg
+			    }
+			    # CRLF that follows chunk.
+			    # If eof, this is handled at the end of this proc.
+			    getTextLine $sock
+			} else {
+			    set n 0
+			    set state(transfer_final) {}
 			}
-			getTextLine $sock
 		    } else {
-			set state(transfer_final) {}
+			# Line expected to hold chunk length is empty, or eof.
+			##Log bad-chunk-measure - token $token
+			set n 0
+			set state(connection) close
+			Log ^X$tk end of response (chunk error) - token $token
+			Eot $token {error in chunked encoding -\
+				fetch terminated}
+		    }
+		} else {
+		    ##Log unchunked - token $token
+		    if {$state(totalsize) == 0} {
+			# We know the transfer is complete only when the server
+			# closes the connection.
+			set state(state) complete
+			set reqSize $state(-blocksize)
+		    } else {
+			# Ask for the whole of the unserved response-body.
+			# This works around a problem with a tls::socket - for
+			# https in keep-alive mode, and a request for
+			# $state(-blocksize) bytes, the last part of the
+			# resource does not get read until the server times out.
+			set reqSize [expr {  $state(totalsize)
+					   - $state(currentsize)}]
+
+			# The workaround fails if reqSize is
+			# capped at $state(-blocksize).
+			# set reqSize [expr {min($reqSize, $state(-blocksize))}]
+		    }
+		    set c $state(currentsize)
+		    set t $state(totalsize)
+		    ##Log non-chunk currentsize $c of totalsize $t -\
+			    token $token
+		    set block [read $sock $reqSize]
+		    set n [string length $block]
+		    if {$n >= 0} {
+			append state(body) $block
+			##Log non-chunk [string length $state(body)] -\
+				token $token
 		    }
 		}
+		# This calculation uses n from the -handler, chunked, or
+		# unchunked case as appropriate.
+		if {[info exists state]} {
+		    if {$n >= 0} {
+			incr state(currentsize) $n
+			set c $state(currentsize)
+			set t $state(totalsize)
+			##Log another $n currentsize $c totalsize $t -\
+				token $token
+		    }
+		    # If Content-Length - check for end of data.
+		    if {
+			   ($state(totalsize) > 0)
+			&& ($state(currentsize) >= $state(totalsize))
+		    } {
+			Log ^F$tk end of response body (unchunked) -\
+				token $token
+			set state(state) complete
+			Eot $token
+		    }
+		}
+	    } err]} {
+		Log ^X$tk end of response (error ${err}) - token $token
+		Finish $token $err
+		return
 	    } else {
-		#Log "read non-chunk $state(currentsize) of $state(totalsize)"
-		set block [read $sock $state(-blocksize)]
-		set n [string length $block]
-		if {$n >= 0} {
-		    append state(body) $block
+		if {[info exists state(-progress)]} {
+		    eval $state(-progress) \
+			[list $token $state(totalsize) $state(currentsize)]
 		}
 	    }
-	    if {[info exists state]} {
-		if {$n >= 0} {
-		    incr state(currentsize) $n
-		}
-		# If Content-Length - check for end of data.
-		if {
-		    ($state(totalsize) > 0)
-		    && ($state(currentsize) >= $state(totalsize))
-		} {
-		    Eof $token
+	}
+
+	# catch as an Eot above may have closed the socket already
+	# $state(state) may be connecting, header, body, or complete
+	if {![set cc [catch {eof $sock} eof]] && $eof} {
+	    ##Log eof - token $token
+	    if {[info exists $token]} {
+		set state(connection) close
+		if {$state(state) eq "complete"} {
+		    # This includes all cases in which the transaction
+		    # can be completed by eof.
+		    # The value "complete" is set only in http::Event, and it is
+		    # used only in the test above.
+		    Log ^F$tk end of response body (unchunked, eof) -\
+			    token $token
+		    Eot $token
+		} else {
+		    # Premature eof.
+		    Log ^X$tk end of response (unexpected eof) - token $token
+		    Eot $token eof
 		}
+	    } else {
+		# open connection closed on a token that has been cleaned up.
+		Log ^X$tk end of response (token error) - token $token
+		CloseSocket $sock
 	    }
-	} err]} {
-	    return [Finish $token $err]
-	} else {
-	    if {[info exists state(-progress)]} {
-		eval $state(-progress) \
-		    [list $token $state(totalsize) $state(currentsize)]
-	    }
+	} elseif {$cc} {
+	    return
 	}
     }
+}
 
-    # catch as an Eof above may have closed the socket already
-    if {![catch {eof $sock} eof] && $eof} {
-	if {[info exists $token]} {
-	    set state(connection) close
-	    Eof $token
-	} else {
-	    # open connection closed on a token that has been cleaned up.
-	    CloseSocket $sock
-	}
-	return
+# http::TestForReplay
+#
+#	Command called if eof is discovered when a socket is first used for a
+#	new transaction.  Typically this occurs if a persistent socket is used
+#	after a period of idleness and the server has half-closed the socket.
+#
+# token  - the connection token returned by http::geturl
+# doing  - "read" or "write"
+# err    - error message, if any
+# caller - code to identify the caller - used only in logging
+#
+# Return Value: boolean, true iff the command calls http::ReplayIfDead.
+
+proc http::TestForReplay {token doing err caller} {
+    variable http
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    if {$doing eq "read"} {
+	set code Q
+	set action response
+	set ing reading
+    } else {
+	set code P
+	set action request
+	set ing writing
+    }
+
+    if {$err eq {}} {
+	set err "detect eof when $ing (server timed out?)"
+    }
+
+    if {$state(method) eq "POST" && !$http(-repost)} {
+	# No Replay.
+	# The present transaction will end when Finish is called.
+	# That call to Finish will abort any other transactions
+	# currently in the write queue.
+	# For calls from http::Event this occurs when execution
+	# reaches the code block at the end of that proc.
+	set msg {no retry for POST with http::config -repost 0}
+	Log reusing socket failed "($caller)" - $msg - token $token
+	Log error - $err - token $token
+	Log ^X$tk end of $action (error) - token $token
+	return 0
+    } else {
+	# Replay.
+	set msg {try a new socket}
+	Log reusing socket failed "($caller)" - $msg - token $token
+	Log error - $err - token $token
+	Log ^$code$tk Any unfinished (incl this one) failed - token $token
+	ReplayIfDead $token $doing
+	return 1
     }
 }
 
@@ -1229,7 +2992,10 @@ proc http::IsBinaryContentType {type} {
 
 # http::getTextLine --
 #
-#	Get one line with the stream in blocking crlf mode
+#	Get one line with the stream in crlf mode.
+#	Used if Transfer-Encoding is chunked.
+#	Empty line is not distinguished from eof.  The caller must
+#	be able to handle this.
 #
 # Arguments
 #	sock	The socket receiving input.
@@ -1239,13 +3005,55 @@ proc http::IsBinaryContentType {type} {
 
 proc http::getTextLine {sock} {
     set tr [fconfigure $sock -translation]
-    set bl [fconfigure $sock -blocking]
-    fconfigure $sock -translation crlf -blocking 1
-    set r [gets $sock]
-    fconfigure $sock -translation $tr -blocking $bl
+    lassign $tr trRead trWrite
+    fconfigure $sock -translation [list crlf $trWrite]
+    set r [BlockingGets $sock]
+    fconfigure $sock -translation $tr
     return $r
 }
 
+# http::BlockingRead
+#
+#	Replacement for a blocking read.
+#	The caller must be a coroutine.
+
+proc http::BlockingRead {sock size} {
+    if {$size < 1} {
+	return
+    }
+    set result {}
+    while 1 {
+	set need [expr {$size - [string length $result]}]
+	set block [read $sock $need]
+	set eof [eof $sock]
+	append result $block
+	if {[string length $result] >= $size || $eof} {
+	    return $result
+	} else {
+	    yield
+	}
+    }
+}
+
+# http::BlockingGets
+#
+#	Replacement for a blocking gets.
+#	The caller must be a coroutine.
+#	Empty line is not distinguished from eof.  The caller must
+#	be able to handle this.
+
+proc http::BlockingGets {sock} {
+    while 1 {
+	set count [gets $sock line]
+	set eof [eof $sock]
+	if {$count > -1 || $eof} {
+	    return $line
+	} else {
+	    yield
+	}
+    }
+}
+
 # http::CopyStart
 #
 #	Error handling wrapper around fcopy
@@ -1271,6 +3079,10 @@ proc http::CopyStart {sock token {initial 1}} {
 	    }
 	}
 	if {[catch {
+	    # FIXME Keep-Alive on https tls::socket with unchunked transfer
+	    # hangs until the server times out. A workaround is possible, as for
+	    # the case without -channel, but it does not use the neat "fcopy"
+	    # solution.
 	    fcopy $sock $state(-channel) -size $state(-blocksize) -command \
 		[list http::CopyDone $token]
 	} err]} {
@@ -1294,7 +3106,7 @@ proc http::CopyChunk {token chunk} {
 		      $token $state(totalsize) $state(currentsize)]
 	}
     } else {
-	Log "CopyChunk Finish $token"
+	Log "CopyChunk Finish - token $token"
 	if {[info exists state(zlib)]} {
 	    set excess ""
 	    foreach stream $state(zlib) {
@@ -1304,7 +3116,7 @@ proc http::CopyChunk {token chunk} {
 	    foreach stream $state(zlib) { $stream close }
 	    unset state(zlib)
 	}
-	Eof $token ;# FIX ME: pipelining.
+	Eot $token ;# FIX ME: pipelining.
     }
 }
 
@@ -1328,33 +3140,53 @@ proc http::CopyDone {token count {error {}}} {
 	eval $state(-progress) \
 	    [list $token $state(totalsize) $state(currentsize)]
     }
-    # At this point the token may have been reset
+    # At this point the token may have been reset.
     if {[string length $error]} {
 	Finish $token $error
     } elseif {[catch {eof $sock} iseof] || $iseof} {
-	Eof $token
+	Eot $token
     } else {
 	CopyStart $sock $token 0
     }
 }
 
-# http::Eof
+# http::Eot
 #
-#	Handle eof on the socket
+#	Called when either:
+#	a. An eof condition is detected on the socket.
+#	b. The client decides that the response is complete.
+#	c. The client detects an inconsistency and aborts the transaction.
+#
+#	Does:
+#	1. Set state(status)
+#	2. Reverse any Content-Encoding
+#	3. Convert charset encoding and line ends if necessary
+#	4. Call http::Finish
 #
 # Arguments
 #	token	The token returned from http::geturl
+#	force	(previously) optional, has no effect
+#	reason	- "eof" means premature EOF (not EOF as the natural end of
+#		  the response)
+#		- "" means completion of response, with or without EOF
+#		- anything else describes an error confition other than
+#		  premature EOF.
 #
 # Side Effects
 #	Clean up the socket
 
-proc http::Eof {token {force 0}} {
+proc http::Eot {token {reason {}}} {
     variable $token
     upvar 0 $token state
-    if {$state(state) eq "header"} {
-	# Premature eof
+    if {$reason eq "eof"} {
+	# Premature eof.
 	set state(status) eof
+	set reason {}
+    } elseif {$reason ne ""} {
+	# Abort the transaction.
+	set state(status) $reason
     } else {
+	# The response is complete.
 	set state(status) ok
     }
 
@@ -1364,14 +3196,15 @@ proc http::Eof {token {force 0}} {
 		set state(body) [zlib $coding $state(body)]
 	    }
 	} err]} {
-	    Log "error doing decompression: $err"
-	    return [Finish $token $err]
+	    Log "error doing decompression for token $token: $err"
+	    Finish $token $err
+	    return
 	}
 
 	if {!$state(binary)} {
 	    # If we are getting text, set the incoming channel's encoding
-	    # correctly.  iso8859-1 is the RFC default, but this could be any IANA
-	    # charset.  However, we only know how to convert what we have
+	    # correctly.  iso8859-1 is the RFC default, but this could be any
+	    # IANA charset.  However, we only know how to convert what we have
 	    # encodings for.
 
 	    set enc [CharsetToEncoding $state(charset)]
@@ -1383,7 +3216,7 @@ proc http::Eof {token {force 0}} {
 	    set state(body) [string map {\r\n \n \r \n} $state(body)]
 	}
     }
-    Finish $token
+    Finish $token $reason
 }
 
 # http::wait --
@@ -1394,7 +3227,7 @@ proc http::Eof {token {force 0}} {
 #	token	Connection token.
 #
 # Results:
-#        The status after the wait.
+#	The status after the wait.
 
 proc http::wait {token} {
     variable $token
@@ -1421,6 +3254,12 @@ proc http::wait {token} {
 #	TODO
 
 proc http::formatQuery {args} {
+    if {[llength $args] % 2} {
+        return \
+            -code error \
+            -errorcode [list HTTP BADARGCNT $args] \
+            {Incorrect number of arguments, must be an even number.}
+    }
     set result ""
     set sep ""
     foreach i $args {
@@ -1465,6 +3304,7 @@ proc http::mapReply {string} {
     }
     return $converted
 }
+interp alias {} http::quoteString {} http::mapReply
 
 # http::ProxyRequired --
 #	Default proxy filter.
@@ -1547,37 +3387,39 @@ proc http::ContentEncoding {token} {
     return $r
 }
 
+proc http::ReceiveChunked {chan command} {
+    set data ""
+    set size -1
+    yield
+    while {1} {
+	chan configure $chan -translation {crlf binary}
+	while {[gets $chan line] < 1} { yield }
+	chan configure $chan -translation {binary binary}
+	if {[scan $line %x size] != 1} {
+	    return -code error "invalid size: \"$line\""
+	}
+	set chunk ""
+	while {$size && ![chan eof $chan]} {
+	    set part [chan read $chan $size]
+	    incr size -[string length $part]
+	    append chunk $part
+	}
+	if {[catch {
+	    uplevel #0 [linsert $command end $chunk]
+	}]} {
+	    http::Log "Error in callback: $::errorInfo"
+	}
+	if {[string length $chunk] == 0} {
+	    # channel might have been closed in the callback
+	    catch {chan event $chan readable {}}
+	    return
+	}
+    }
+}
+
 proc http::make-transformation-chunked {chan command} {
-    set lambda {{chan command} {
-        set data ""
-        set size -1
-        yield
-        while {1} {
-            chan configure $chan -translation {crlf binary}
-            while {[gets $chan line] < 1} { yield }
-            chan configure $chan -translation {binary binary}
-            if {[scan $line %x size] != 1} { return -code error "invalid size: \"$line\"" }
-            set chunk ""
-            while {$size && ![chan eof $chan]} {
-                set part [chan read $chan $size]
-                incr size -[string length $part]
-                append chunk $part
-            }
-            if {[catch {
-		uplevel #0 [linsert $command end $chunk]
-	    }]} {
-		http::Log "Error in callback: $::errorInfo"
-	    }
-            if {[string length $chunk] == 0} {
-		# channel might have been closed in the callback
-                catch {chan event $chan readable {}}
-                return
-            }
-        }
-    }}
-    coroutine dechunk$chan ::apply $lambda $chan $command
-    chan event $chan readable [namespace origin dechunk$chan]
-    return
+    coroutine [namespace current]::dechunk$chan ::http::ReceiveChunked $chan $command
+    chan event $chan readable [namespace current]::dechunk$chan
 }
 
 # Local variables:
diff --git a/library/http/pkgIndex.tcl b/library/http/pkgIndex.tcl
index 3324af9..4f74635 100644
--- a/library/http/pkgIndex.tcl
+++ b/library/http/pkgIndex.tcl
@@ -1,2 +1,2 @@
 if {![package vsatisfies [package provide Tcl] 8.6-]} {return}
-package ifneeded http 2.8.13 [list tclPkgSetup $dir http 2.8.13 {{http.tcl source {::http::config ::http::formatQuery ::http::geturl ::http::reset ::http::wait ::http::register ::http::unregister ::http::mapReply}}}]
+package ifneeded http 2.9.0 [list tclPkgSetup $dir http 2.9.0 {{http.tcl source {::http::config ::http::formatQuery ::http::geturl ::http::reset ::http::wait ::http::register ::http::unregister ::http::mapReply}}}]
diff --git a/library/init.tcl b/library/init.tcl
index 530ce58..51339d0 100644
--- a/library/init.tcl
+++ b/library/init.tcl
@@ -6,7 +6,10 @@
 # Copyright (c) 1991-1993 The Regents of the University of California.
 # Copyright (c) 1994-1996 Sun Microsystems, Inc.
 # Copyright (c) 1998-1999 Scriptics Corporation.
-# Copyright (c) 2004 by Kevin B. Kenny.  All rights reserved.
+# Copyright (c) 2004 by Kevin B. Kenny.
+# Copyright (c) 2018 by Sean Woods
+#
+# All rights reserved.
 #
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
@@ -795,3 +798,20 @@ proc tcl::CopyDirectory {action src dest} {
     }
     return
 }
+set isafe [interp issafe]
+###
+# Package manifest for all Tcl packages included in the /library file system
+###
+set isafe [interp issafe]
+set dir [file dirname [info script]]
+foreach {safe package version file} {
+  0 http            2.9.0 {http http.tcl}
+  1 msgcat          1.7.0  {msgcat msgcat.tcl}
+  1 opt             0.4.7  {opt optparse.tcl}
+  0 platform        1.0.14 {platform platform.tcl}
+  0 platform::shell 1.1.4  {platform shell.tcl}
+  1 tcltest         2.4.1  {tcltest tcltest.tcl}
+} {
+  if {$isafe && !$safe} continue
+  package ifneeded $package $version  [list source [file join $dir {*}$file]]
+}
diff --git a/library/install.tcl b/library/install.tcl
new file mode 100644
index 0000000..e62226e
--- /dev/null
+++ b/library/install.tcl
@@ -0,0 +1,244 @@
+###
+# Installer actions built into tclsh and invoked
+# if the first command line argument is "install"
+###
+if {[llength $argv] < 2} {
+  exit 0
+}
+namespace eval ::practcl {}
+###
+# Installer tools
+###
+proc ::practcl::_isdirectory name {
+  return [file isdirectory $name]
+}
+###
+# Return true if the pkgindex file contains
+# any statement other than "package ifneeded"
+# and/or if any package ifneeded loads a DLL
+###
+proc ::practcl::_pkgindex_directory {path} {
+  set buffer {}
+  set pkgidxfile [file join $path pkgIndex.tcl]
+  if {![file exists $pkgidxfile]} {
+    # No pkgIndex file, read the source
+    foreach file [glob -nocomplain $path/*.tm] {
+      set file [file normalize $file]
+      set fname [file rootname [file tail $file]]
+      ###
+      # We used to be able to ... Assume the package is correct in the filename
+      # No hunt for a "package provides"
+      ###
+      set package [lindex [split $fname -] 0]
+      set version [lindex [split $fname -] 1]
+      ###
+      # Read the file, and override assumptions as needed
+      ###
+      set fin [open $file r]
+      set dat [read $fin]
+      close $fin
+      # Look for a teapot style Package statement
+      foreach line [split $dat \n] {
+        set line [string trim $line]
+        if { [string range $line 0 9] != "# Package " } continue
+        set package [lindex $line 2]
+        set version [lindex $line 3]
+        break
+      }
+      # Look for a package provide statement
+      foreach line [split $dat \n] {
+        set line [string trim $line]
+        if { [string range $line 0 14] != "package provide" } continue
+        set package [lindex $line 2]
+        set version [lindex $line 3]
+        break
+      }
+      append buffer "package ifneeded $package $version \[list source \[file join \$dir [file tail $file]\]\]" \n
+    }
+    foreach file [glob -nocomplain $path/*.tcl] {
+      if { [file tail $file] == "version_info.tcl" } continue
+      set fin [open $file r]
+      set dat [read $fin]
+      close $fin
+      if {![regexp "package provide" $dat]} continue
+      set fname [file rootname [file tail $file]]
+      # Look for a package provide statement
+      foreach line [split $dat \n] {
+        set line [string trim $line]
+        if { [string range $line 0 14] != "package provide" } continue
+        set package [lindex $line 2]
+        set version [lindex $line 3]
+        if {[string index $package 0] in "\$ \[ @"} continue
+        if {[string index $version 0] in "\$ \[ @"} continue
+        append buffer "package ifneeded $package $version \[list source \[file join \$dir [file tail $file]\]\]" \n
+        break
+      }
+    }
+    return $buffer
+  }
+  set fin [open $pkgidxfile r]
+  set dat [read $fin]
+  close $fin
+  set trace 0
+  #if {[file tail $path] eq "tool"} {
+  #  set trace 1
+  #}
+  set thisline {}
+  foreach line [split $dat \n] {
+    append thisline $line \n
+    if {![info complete $thisline]} continue
+    set line [string trim $line]
+    if {[string length $line]==0} {
+      set thisline {} ; continue
+    }
+    if {[string index $line 0] eq "#"} {
+      set thisline {} ; continue
+    }
+    if {[regexp "if.*catch.*package.*Tcl.*return" $thisline]} {
+      if {$trace} {puts "[file dirname $pkgidxfile] Ignoring $thisline"}
+      set thisline {} ; continue
+    }
+    if {[regexp "if.*package.*vsatisfies.*package.*provide.*return" $thisline]} {
+      if {$trace} { puts "[file dirname $pkgidxfile] Ignoring $thisline" }
+      set thisline {} ; continue
+    }
+    if {![regexp "package.*ifneeded" $thisline]} {
+      # This package index contains arbitrary code
+      # source instead of trying to add it to the master
+      # package index
+      if {$trace} { puts "[file dirname $pkgidxfile] Arbitrary code $thisline" }
+      return {source [file join $dir pkgIndex.tcl]}
+    }
+    append buffer $thisline \n
+    set thisline {}
+  }
+  if {$trace} {puts [list [file dirname $pkgidxfile] $buffer]}
+  return $buffer
+}
+
+
+proc ::practcl::_pkgindex_path_subdir {path} {
+  set result {}
+  foreach subpath [glob -nocomplain [file join $path *]] {
+    if {[file isdirectory $subpath]} {
+      lappend result $subpath {*}[_pkgindex_path_subdir $subpath]
+    }
+  }
+  return $result
+}
+###
+# Index all paths given as though they will end up in the same
+# virtual file system
+###
+proc ::practcl::pkgindex_path args {
+  set stack {}
+  set buffer {
+lappend ::PATHSTACK $dir
+  }
+  foreach base $args {
+    set base [file normalize $base]
+    set paths {}
+    foreach dir [glob -nocomplain [file join $base *]] {
+      if {[file tail $dir] eq "teapot"} continue
+      lappend paths $dir {*}[::practcl::_pkgindex_path_subdir $dir]
+    }
+    set i    [string length  $base]
+    # Build a list of all of the paths
+    if {[llength $paths]} {
+      foreach path $paths {
+        if {$path eq $base} continue
+        set path_indexed($path) 0
+      }
+    } else {
+      puts [list WARNING: NO PATHS FOUND IN $base]
+    }
+    set path_indexed($base) 1
+    set path_indexed([file join $base boot tcl]) 1
+    foreach teapath [glob -nocomplain [file join $base teapot *]] {
+      set pkg [file tail $teapath]
+      append buffer [list set pkg $pkg]
+      append buffer {
+set pkginstall [file join $::g(HOME) teapot $pkg]
+if {![file exists $pkginstall]} {
+  installDir [file join $dir teapot $pkg] $pkginstall
+}
+}
+    }
+    foreach path $paths {
+      if {$path_indexed($path)} continue
+      set thisdir [file_relative $base $path]
+      set idxbuf [::practcl::_pkgindex_directory $path]
+      if {[string length $idxbuf]} {
+        incr path_indexed($path)
+        append buffer "set dir \[set PKGDIR \[file join \[lindex \$::PATHSTACK end\] $thisdir\]\]" \n
+        append buffer [string map {$dir $PKGDIR} [string trimright $idxbuf]] \n
+      }
+    }
+  }
+  append buffer {
+set dir [lindex $::PATHSTACK end]
+set ::PATHSTACK [lrange $::PATHSTACK 0 end-1]
+}
+  return $buffer
+}
+
+###
+# topic: 64319f4600fb63c82b2258d908f9d066
+# description: Script to build the VFS file system
+###
+proc ::practcl::installDir {d1 d2} {
+
+  puts [format {%*sCreating %s} [expr {4 * [info level]}] {} [file tail $d2]]
+  file delete -force -- $d2
+  file mkdir $d2
+
+  foreach ftail [glob -directory $d1 -nocomplain -tails *] {
+    set f [file join $d1 $ftail]
+    if {[file isdirectory $f] && [string compare CVS $ftail]} {
+      installDir $f [file join $d2 $ftail]
+    } elseif {[file isfile $f]} {
+	    file copy -force $f [file join $d2 $ftail]
+	    if {$::tcl_platform(platform) eq {unix}} {
+        file attributes [file join $d2 $ftail] -permissions 0644
+	    } else {
+        file attributes [file join $d2 $ftail] -readonly 1
+	    }
+    }
+  }
+
+  if {$::tcl_platform(platform) eq {unix}} {
+    file attributes $d2 -permissions 0755
+  } else {
+    file attributes $d2 -readonly 1
+  }
+}
+
+proc ::practcl::copyDir {d1 d2 {toplevel 1}} {
+  #if {$toplevel} {
+  #  puts [list ::practcl::copyDir $d1 -> $d2]
+  #}
+  #file delete -force -- $d2
+  file mkdir $d2
+
+  foreach ftail [glob -directory $d1 -nocomplain -tails *] {
+    set f [file join $d1 $ftail]
+    if {[file isdirectory $f] && [string compare CVS $ftail]} {
+      copyDir $f [file join $d2 $ftail] 0
+    } elseif {[file isfile $f]} {
+      file copy -force $f [file join $d2 $ftail]
+    }
+  }
+}
+
+switch [lindex $argv 1] {
+  mkzip {
+    zipfs mkzip {*}[lrange $argv 2 end]
+  }
+  mkzip {
+    zipfs mkimg {*}[lrange $argv 2 end]
+  }
+  default {
+    ::practcl::[lindex $argv 1] {*}[lrange $argv 2 end]
+  }
+}
+exit 0
diff --git a/library/reg/pkgIndex.tcl b/library/reg/pkgIndex.tcl
index b1fe234..ee559b5 100755
--- a/library/reg/pkgIndex.tcl
+++ b/library/reg/pkgIndex.tcl
@@ -1,9 +1,9 @@
 if {([info commands ::tcl::pkgconfig] eq "")
 	|| ([info sharedlibextension] ne ".dll")} return
 if {[::tcl::pkgconfig get debug]} {
-    package ifneeded registry 1.3.2 \
+    package ifneeded registry 1.3.3 \
             [list load [file join $dir tclreg13g.dll] registry]
 } else {
-    package ifneeded registry 1.3.2 \
+    package ifneeded registry 1.3.3 \
             [list load [file join $dir tclreg13.dll] registry]
 }
diff --git a/library/safe.tcl b/library/safe.tcl
index ea6391d..7b165d2 100644
--- a/library/safe.tcl
+++ b/library/safe.tcl
@@ -455,37 +455,35 @@ proc ::safe::InterpInit {
     foreach {command alias} {
 	source   AliasSource
 	load     AliasLoad
-	encoding AliasEncoding
 	exit     interpDelete
 	glob     AliasGlob
     } {
 	::interp alias $slave $command {} [namespace current]::$alias $slave
     }
 
+    # UGLY POINT! These commands are safe (they're ensembles with unsafe
+    # subcommands), but is assumed to not be by existing policies so it is
+    # hidden by default. Hack it...
+    foreach command {encoding file} {
+	::interp alias $slave $command {} interp invokehidden $slave $command
+    }
+
     # This alias lets the slave have access to a subset of the 'file'
     # command functionality.
 
-    ::interp expose $slave file
     foreach subcommand {dirname extension rootname tail} {
 	::interp alias $slave ::tcl::file::$subcommand {} \
 	    ::safe::AliasFileSubcommand $slave $subcommand
     }
-    foreach subcommand {
-	atime attributes copy delete executable exists isdirectory isfile
-	link lstat mtime mkdir nativename normalize owned readable readlink
-	rename size stat tempfile type volumes writable
-    } {
-	::interp alias $slave ::tcl::file::$subcommand {} \
-	    ::safe::BadSubcommand $slave file $subcommand
-    }
+
+    # Subcommand of 'encoding' that has special handling; [encoding system] is
+    # OK provided it has no other arguments passed to it.
+    ::interp alias $slave ::tcl::encoding::system {} \
+	::safe::AliasEncodingSystem $slave
 
     # Subcommands of info
-    foreach {subcommand alias} {
-	nameofexecutable   AliasExeName
-    } {
-	::interp alias $slave ::tcl::info::$subcommand \
-	    {} [namespace current]::$alias $slave
-    }
+    ::interp alias $slave ::tcl::info::nameofexecutable {} \
+	::safe::AliasExeName $slave
 
     # The allowed slave variables already have been set by Tcl_MakeSafe(3)
 
@@ -1027,16 +1025,13 @@ proc ::safe::BadSubcommand {slave command subcommand args} {
     return -code error -errorcode {TCL SAFE SUBCOMMAND} $msg
 }
 
-# AliasEncoding is the target of the "encoding" alias in safe interpreters.
-
-proc ::safe::AliasEncoding {slave option args} {
-    # Note that [encoding dirs] is not supported in safe slaves at all
-    set subcommands {convertfrom convertto names system}
+# AliasEncodingSystem is the target of the "encoding system" alias in safe
+# interpreters.
+proc ::safe::AliasEncodingSystem {slave args} {
     try {
-	set option [tcl::prefix match -error [list -level 1 -errorcode \
-		[list TCL LOOKUP INDEX option $option]] $subcommands $option]
-	# Special case: [encoding system] ok, but [encoding system foo] not
-	if {$option eq "system" && [llength $args]} {
+	# Must not pass extra arguments; safe slaves may not set the system
+	# encoding but they may read it.
+	if {[llength $args]} {
 	    return -code error -errorcode {TCL WRONGARGS} \
 		"wrong # args: should be \"encoding system\""
 	}
@@ -1044,7 +1039,7 @@ proc ::safe::AliasEncoding {slave option args} {
 	Log $slave $msg
 	return -options $options $msg
     }
-    tailcall ::interp invokehidden $slave encoding $option {*}$args
+    tailcall ::interp invokehidden $slave tcl:encoding:system
 }
 
 # Various minor hiding of platform features. [Bug 2913625]
diff --git a/library/tcltest/tcltest.tcl b/library/tcltest/tcltest.tcl
index eb42ff1..f1b6082 100644
--- a/library/tcltest/tcltest.tcl
+++ b/library/tcltest/tcltest.tcl
@@ -1254,10 +1254,6 @@ proc tcltest::DefineConstraintInitializers {} {
     ConstraintInitializer interactive \
 	    {expr {[info exists ::tcl_interactive] && $::tcl_interactive}}
 
-    # Skip slow tests (to enable slow tests add parameter `-constraints slowTest`)
-
-    ConstraintInitializer slowTest {format 0}
-
     # Some tests can only be run if the installation came from a CD
     # image instead of a web image.  Some tests must be skipped if you
     # are running as root on Unix.  Other tests can only be run if you
diff --git a/tests/compExpr-old.test b/tests/compExpr-old.test
index 798c92a..e57f799 100644
--- a/tests/compExpr-old.test
+++ b/tests/compExpr-old.test
@@ -331,16 +331,9 @@ test compExpr-old-9.1 {CompileRelationalExpr: just shift expr} {expr 3<<2} 12
 test compExpr-old-9.2 {CompileRelationalExpr: just shift expr} {expr 0xff>>2} 63
 test compExpr-old-9.3 {CompileRelationalExpr: just shift expr} {expr -1>>2} -1
 test compExpr-old-9.4 {CompileRelationalExpr: just shift expr} {expr {1<<3}} 8
-
-# The following test is different for 32-bit versus 64-bit
-# architectures because LONG_MIN is different
-
-test compExpr-old-9.5a {CompileRelationalExpr: shift expr producing LONG_MIN} longIs64bit {
+test compExpr-old-9.5 {CompileRelationalExpr: large shift expr} {
     expr {int(1<<63)}
-} -9223372036854775808
-test compExpr-old-9.5b {CompileRelationalExpr: shift expr producing LONG_MIN} longIs32bit {
-    expr {int(1<<31)}
-} -2147483648
+} 9223372036854775808
 
 test compExpr-old-9.6 {CompileRelationalExpr: error in shift expr} -body {
     expr x>>3
diff --git a/tests/config.test b/tests/config.test
index d14837e..468a1df 100644
--- a/tests/config.test
+++ b/tests/config.test
@@ -19,7 +19,7 @@ if {[lsearch [namespace children] ::tcltest] == -1} {
 
 test pkgconfig-1.1 {query keys} {
     lsort [::tcl::pkgconfig list]
-} {64bit bindir,install bindir,runtime compile_debug compile_stats debug docdir,install docdir,runtime includedir,install includedir,runtime libdir,install libdir,runtime mem_debug optimized profiled scriptdir,install scriptdir,runtime threaded}
+} {64bit bindir,install bindir,runtime compile_debug compile_stats debug dllfile,runtime docdir,install docdir,runtime includedir,install includedir,runtime libdir,install libdir,runtime mem_debug optimized profiled scriptdir,install scriptdir,runtime threaded zipfile,runtime}
 test pkgconfig-1.2 {query keys multiple times} {
     string compare [::tcl::pkgconfig list] [::tcl::pkgconfig list]
 } 0
diff --git a/tests/env.test b/tests/env.test
index 59d5391..79a353a 100644
--- a/tests/env.test
+++ b/tests/env.test
@@ -16,6 +16,8 @@ if {[lsearch [namespace children] ::tcltest] == -1} {
     namespace import -force ::tcltest::*
 }
 
+loadTestedCommands
+catch [list package require -exact Tcltest [info patchlevel]]
 package require tcltests
 
 # [exec] is required here to see the actual environment received by child
diff --git a/tests/exec.test b/tests/exec.test
index dfc44c4..4fd8b8d 100644
--- a/tests/exec.test
+++ b/tests/exec.test
@@ -17,6 +17,8 @@
 package require tcltest 2
 namespace import -force ::tcltest::*
 
+loadTestedCommands
+catch [list package require -exact Tcltest [info patchlevel]]
 package require tcltests
 
 # All tests require the "exec" command.
diff --git a/tests/execute.test b/tests/execute.test
index 2c54a71..3b62bc9 100644
--- a/tests/execute.test
+++ b/tests/execute.test
@@ -805,9 +805,9 @@ test execute-7.7 {Wide int handling in INST_EQ and [incr]} {
     set y [expr {$x+1}]
     expr {double($x) == double($y)}
 } 1
-test execute-7.8 {Wide int conversions can change sign} longIs32bit {
-    set x 0x80000000
-    expr {int($x) < wide($x)}
+test execute-7.8 {Wide int conversions can change sign} {
+    set x 0x8000000000000000
+    expr {wide($x) < 0}
 } 1
 test execute-7.9 {Wide int handling in INST_MOD} {
     expr {(wide(1)<<60) % ((wide(47)<<45)-1)}
@@ -887,12 +887,12 @@ test execute-7.31 {Wide int handling in abs()} {
     set y 0x123456871234568
     concat [expr {abs($x)}] [expr {abs($y)}]
 } {730503879441204585 81985533099853160}
-test execute-7.32 {Wide int handling} longIs32bit {
+test execute-7.32 {Wide int handling} {
     expr {int(1024 * 1024 * 1024 * 1024)}
-} 0
-test execute-7.33 {Wide int handling} longIs32bit {
+} 1099511627776
+test execute-7.33 {Wide int handling} {
     expr {int(0x1 * 1024 * 1024 * 1024 * 1024)}
-} 0
+} 1099511627776
 test execute-7.34 {Wide int handling} {
     expr {wide(0x1) * 1024 * 1024 * 1024 * 1024}
 } 1099511627776
diff --git a/tests/expr-old.test b/tests/expr-old.test
index 3192c74..003ee00 100644
--- a/tests/expr-old.test
+++ b/tests/expr-old.test
@@ -814,10 +814,10 @@ test expr-old-32.32 {math functions in expressions} {
 } {-1}
 test expr-old-32.33 {math functions in expressions} {
     expr int(1e60)
-} 0
+} 999999999999999949387135297074018866963645011013410073083904
 test expr-old-32.34 {math functions in expressions} {
     expr int(-1e60)
-} 0
+} -999999999999999949387135297074018866963645011013410073083904
 test expr-old-32.35 {math functions in expressions} {
     expr round(1.49)
 } {1}
@@ -1036,8 +1036,8 @@ test expr-old-37.8 {Tcl_ExprLong handles overflows} testexprlong {
     testexprlong -0x80000000
 } {This is a result: -2147483648}
 test expr-old-37.9 {Tcl_ExprLong handles overflows} {testexprlong longIs32bit} {
-    testexprlong -0xffffffff
-} {This is a result: 1}
+    testexprlong -0x7fffffff
+} {This is a result: -2147483647}
 test expr-old-37.10 {Tcl_ExprLong handles overflows} \
     -constraints {testexprlong longIs32bit} \
     -match glob \
@@ -1061,9 +1061,13 @@ test expr-old-37.13 {Tcl_ExprLong handles overflows} \
 test expr-old-37.14 {Tcl_ExprLong handles overflows} testexprlong {
     testexprlong -2147483648.
 } {This is a result: -2147483648}
-test expr-old-37.15 {Tcl_ExprLong handles overflows} {testexprlong longIs32bit} {
-    testexprlong -4294967295.
-} {This is a result: 1}
+test expr-old-37.15 {Tcl_ExprLong handles overflows} \
+    -constraints {testexprlong longIs32bit} \
+    -match glob \
+    -body {
+	list [catch {testexprlong -2147483649.} result] $result
+    } \
+    -result {1 {integer value too large to represent*}}
 test expr-old-37.16 {Tcl_ExprLong handles overflows} \
     -constraints {testexprlong longIs32bit} \
     -match glob \
diff --git a/tests/expr.test b/tests/expr.test
index 0762cf2..7136afc 100644
--- a/tests/expr.test
+++ b/tests/expr.test
@@ -416,12 +416,9 @@ test expr-9.1 {CompileRelationalExpr: just shift expr} {expr 3<<2} 12
 test expr-9.2 {CompileRelationalExpr: just shift expr} {expr 0xff>>2} 63
 test expr-9.3 {CompileRelationalExpr: just shift expr} {expr -1>>2} -1
 test expr-9.4 {CompileRelationalExpr: just shift expr} {expr {1<<3}} 8
-test expr-9.5a {CompileRelationalExpr: shift expr producing LONG_MIN} longIs64bit {
+test expr-9.5 {CompileRelationalExpr: shift expr producing LONG_MIN} {
     expr {int(1<<63)}
-} -9223372036854775808
-test expr-9.5b {CompileRelationalExpr: shift expr producing LONG_MIN} longIs32bit {
-    expr {int(1<<31)}
-} -2147483648
+} 9223372036854775808
 test expr-9.6 {CompileRelationalExpr: error in shift expr} -body {
     expr x>>3
 } -returnCodes error -match glob -result *
@@ -1404,8 +1401,8 @@ test expr-24.1 {expr edge cases; shifting} {expr int(5)>>32} 0
 test expr-24.2 {expr edge cases; shifting} {expr int(5)>>63} 0
 test expr-24.3 {expr edge cases; shifting} {expr wide(5)>>32} 0
 test expr-24.4 {expr edge cases; shifting} {expr wide(5)>>63} 0
-test expr-24.5 {expr edge cases; shifting} longIs32bit {expr int(5<<32)} 0
-test expr-24.6 {expr edge cases; shifting} longIs32bit {expr int(5<<63)} 0
+test expr-24.5 {expr edge cases; shifting} {expr int(5<<32)} 21474836480
+test expr-24.6 {expr edge cases; shifting} {expr int(5<<63)} 46116860184273879040
 test expr-24.7 {expr edge cases; shifting} {expr wide(5)<<32} 21474836480
 test expr-24.8 {expr edge cases; shifting} {expr wide(10<<63)} 0
 test expr-24.9 {expr edge cases; shifting} {expr 5>>32} 0
@@ -5808,7 +5805,7 @@ test expr-32.9 {bignum regression} {
     expr {0%-(1+(1<<63))}
 } 0
 
-test expr-33.1 {parse largest long value} longIs32bit {
+test expr-33.1 {parse largest long value} {
     set max_long_str 2147483647
     set max_long_hex "0x7FFFFFFF "
 
@@ -5822,7 +5819,7 @@ test expr-33.1 {parse largest long value} longIs32bit {
         [expr {$max_long + 0}] \
         [expr {2147483647 + 0}] \
         [expr {$max_long == $max_long_hex}] \
-        [expr {int(2147483647 + 1) < 0}] \
+        [expr {int(2147483647 + 1) > 0}] \
 
 } {2147483647 2147483647 2147483647 2147483647 1 1}
 test expr-33.2 {parse smallest long value} longIs32bit {
@@ -5842,7 +5839,7 @@ test expr-33.2 {parse smallest long value} longIs32bit {
         [expr {$min_long + 0}] \
         [expr {-2147483648 + 0}] \
         [expr {$min_long == $min_long_hex}] \
-        [expr {int(-2147483648 - 1) == 0x7FFFFFFF}] \
+        [expr {int(-2147483648 - 1) == -0x80000001}] \
 
 } {-2147483648 -2147483648 -2147483648 -2147483648 1 1}
 test expr-33.3 {parse largest wide value} wideIs64bit {
@@ -5922,17 +5919,17 @@ test expr-34.11 {expr edge cases} {
 test expr-34.12 {expr edge cases} {
     expr {$min % -2}
 } {0}
-test expr-34.13 {expr edge cases} longIs32bit {
+test expr-34.13 {expr edge cases} {
     expr {int($min / -1)}
-} {-2147483648}
+} {2147483648}
 test expr-34.14 {expr edge cases} {
     expr {$min % -1}
 } {0}
-test expr-34.15 {expr edge cases} longIs32bit {
-    expr {int($min * -1)}
+test expr-34.15 {expr edge cases} {
+    expr {-int($min * -1)}
 } $min
-test expr-34.16 {expr edge cases} longIs32bit {
-    expr {int(-$min)}
+test expr-34.16 {expr edge cases} {
+    expr {-int(-$min)}
 } $min
 test expr-34.17 {expr edge cases} {
     expr {$min / 1}
@@ -6719,8 +6716,8 @@ test expr-39.8 {Tcl_ExprLongObj handles overflows} testexprlongobj {
     testexprlongobj -0x80000000
 } {This is a result: -2147483648}
 test expr-39.9 {Tcl_ExprLongObj handles overflows} {testexprlongobj longIs32bit} {
-    testexprlongobj -0xffffffff
-} {This is a result: 1}
+    testexprlongobj -0x7fffffff
+} {This is a result: -2147483647}
 test expr-39.10 {Tcl_ExprLongObj handles overflows} \
     -constraints {testexprlongobj longIs32bit} \
     -match glob \
@@ -6745,8 +6742,8 @@ test expr-39.14 {Tcl_ExprLongObj handles overflows} testexprlongobj {
     testexprlongobj -2147483648.
 } {This is a result: -2147483648}
 test expr-39.15 {Tcl_ExprLongObj handles overflows} {testexprlongobj longIs32bit} {
-    testexprlongobj -4294967295.
-} {This is a result: 1}
+    testexprlongobj -2147483648.
+} {This is a result: -2147483648}
 test expr-39.16 {Tcl_ExprLongObj handles overflows} \
     -constraints {testexprlongobj longIs32bit} \
     -match glob \
diff --git a/tests/get.test b/tests/get.test
index c381098..e35b2cc 100644
--- a/tests/get.test
+++ b/tests/get.test
@@ -45,14 +45,14 @@ test get-1.7 {Tcl_GetInt procedure} {testgetint longIs64bit} {
     list [catch {testgetint 44 18446744073709551616} msg] $msg $errorCode
 } {1 {integer value too large to represent} {ARITH IOVERFLOW {integer value too large to represent}}}
 test get-1.8 {Tcl_GetInt procedure} {testgetint longIs64bit} {
-    list [catch {testgetint 18446744073709551614} msg] $msg
-} {0 -2}
+    testgetint 18446744073709551614
+} {-2}
 test get-1.9 {Tcl_GetInt procedure} {testgetint longIs64bit} {
-    list [catch {testgetint +18446744073709551614} msg] $msg
-} {0 -2}
+    testgetint +18446744073709551614
+} {-2}
 test get-1.10 {Tcl_GetInt procedure} {testgetint longIs64bit} {
-    list [catch {testgetint -18446744073709551614} msg] $msg
-} {0 2}
+    list [catch {testgetint -18446744073709551614} msg] $msg $errorCode
+} {1 {integer value too large to represent} {ARITH IOVERFLOW {integer value too large to represent}}}
 test get-1.11 {Tcl_GetInt procedure} {testgetint longIs32bit} {
     list [catch {testgetint 44 4294967296} msg] $msg $errorCode
 } {1 {integer value too large to represent} {ARITH IOVERFLOW {integer value too large to represent}}}
@@ -64,7 +64,7 @@ test get-1.13 {Tcl_GetInt procedure} {testgetint longIs32bit} {
 } {0 -2}
 test get-1.14 {Tcl_GetInt procedure} {testgetint longIs32bit} {
     list [catch {testgetint -4294967294} msg] $msg
-} {0 2}
+} {1 {integer value too large to represent}}
 
 test get-2.1 {Tcl_GetInt procedure} {
     format %g 1.23
diff --git a/tests/http.test b/tests/http.test
index e165804..b6a7251 100644
--- a/tests/http.test
+++ b/tests/http.test
@@ -82,7 +82,7 @@ if {[catch {package present Thread}] == 0 && [file exists $httpdFile]} {
 test http-1.1 {http::config} {
     http::config -useragent UserAgent
     http::config
-} [list -accept */* -proxyfilter http::ProxyRequired -proxyhost {} -proxyport {} -urlencoding utf-8 -useragent "UserAgent"]
+} [list -accept */* -pipeline 1 -postfresh 0 -proxyfilter http::ProxyRequired -proxyhost {} -proxyport {} -repost 0 -urlencoding utf-8 -useragent UserAgent -zip 1]
 test http-1.2 {http::config} {
     http::config -proxyfilter
 } http::ProxyRequired
@@ -97,10 +97,10 @@ test http-1.4 {http::config} {
     set x [http::config]
     http::config {*}$savedconf
     set x
-} {-accept */* -proxyfilter myFilter -proxyhost nowhere.come -proxyport 8080 -urlencoding iso8859-1 -useragent {Tcl Test Suite}}
+} {-accept */* -pipeline 1 -postfresh 0 -proxyfilter myFilter -proxyhost nowhere.come -proxyport 8080 -repost 0 -urlencoding iso8859-1 -useragent {Tcl Test Suite} -zip 1}
 test http-1.5 {http::config} -returnCodes error -body {
     http::config -proxyhost {} -junk 8080
-} -result {Unknown option -junk, must be: -accept, -proxyfilter, -proxyhost, -proxyport, -urlencoding, -useragent}
+} -result {Unknown option -junk, must be: -accept, -pipeline, -postfresh, -proxyfilter, -proxyhost, -proxyport, -repost, -urlencoding, -useragent, -zip}
 test http-1.6 {http::config} -setup {
     set oldenc [http::config -urlencoding]
 } -body {
diff --git a/tests/http11.test b/tests/http11.test
index 2e50837..1e30802 100644
--- a/tests/http11.test
+++ b/tests/http11.test
@@ -515,10 +515,7 @@ proc handler {var sock token} {
     set chunk [read $sock]
     append data $chunk
     #::http::Log "handler read [string length $chunk] ([chan configure $sock -buffersize])"
-    if {[eof $sock]} {
-        #::http::Log "handler eof $sock"
-	chan event $sock readable {}
-    }
+    return [string length $chunk]
 }
 
 test http11-3.0 "-handler,close,identity" -setup {
diff --git a/tests/httpPipeline.test b/tests/httpPipeline.test
new file mode 100644
index 0000000..8de79b9
--- /dev/null
+++ b/tests/httpPipeline.test
@@ -0,0 +1,866 @@
+# httpPipeline.test
+#
+#	Test HTTP/1.1 concurrent requests including
+#	queueing, pipelining and retries.
+#
+# Copyright (C) 2018 Keith Nash <kjnash@users.sourceforge.net>
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+package require tcltest 2
+namespace import -force ::tcltest::*
+
+package require http 2.8
+
+set sourcedir [file normalize [file dirname [info script]]]
+source [file join $sourcedir httpTest.tcl]
+source [file join $sourcedir httpTestScript.tcl]
+
+# ------------------------------------------------------------------------------
+# (1) Define the test scripts that will be used to generate logs for analysis -
+#     and also define the "correct" results.
+# ------------------------------------------------------------------------------
+
+proc ReturnTestScriptAndResult {ca cb delay te} {
+
+    switch -- $ca {
+	1     {set start {
+	    START
+	    KEEPALIVE 0
+	    PIPELINE  0
+	}}
+
+	2     {set start {
+	    START
+	    KEEPALIVE 0
+	    PIPELINE  1
+	}}
+
+	3     {set start {
+	    START
+	    KEEPALIVE 1
+	    PIPELINE  0
+	}}
+
+	4     {set start {
+	    START
+	    KEEPALIVE 1
+	    PIPELINE  1
+	}}
+
+	default {
+	    return -code error {no matching script}
+	}
+    }
+
+    set middle "
+	    [list DELAY $delay]
+    "
+
+    switch -- $cb {
+	1     {set end {
+	    GET a
+	    GET b
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 ? ? ?}
+	    set resLong  {1 2 3 4}
+	}
+
+	2     {set end {
+	    GET a
+	    HEAD b
+	    GET c
+	    HEAD a
+	    HEAD c
+	    STOP
+	    }
+	    set resShort {1 ? ? ? ?}
+	    set resLong  {1 2 3 4 5}
+	}
+
+	3     {set end {
+	    HEAD a
+	    GET b
+	    HEAD c
+	    HEAD b
+	    GET a
+	    GET b
+	    STOP
+	    }
+	    set resShort {1 ? ? ? ? ?}
+	    set resLong  {1 2 3 4 5 6}
+	}
+
+	4     {set end {
+	    GET a
+	    GET b
+	    GET c
+	    GET a
+	    POST b address=home code=brief paid=yes
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    STOP
+	    }
+	    set resShort {1 ? ? ? 5 ? ? ? ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	5     {set end {
+	    POST a address=home code=brief paid=yes
+	    POST b address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes
+	    POST a address=home code=brief paid=yes
+	    POST b address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes
+	    POST a address=home code=brief paid=yes
+	    POST b address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes
+	    STOP
+	    }
+	    set resShort {1 2 3 4 5 6 7 8 9}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	6     {set end {
+	    POST a address=home code=brief paid=yes
+	    GET b address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes
+	    GET a address=home code=brief paid=yes
+	    GET b address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes
+	    POST a address=home code=brief paid=yes
+	    HEAD b address=home code=brief paid=yes
+	    GET c address=home code=brief paid=yes
+	    STOP
+	    }
+	    set resShort {1 ? 3 ? ? 6 7 ? ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	7     {set end {
+	    GET b address=home code=brief paid=yes
+	    POST a address=home code=brief paid=yes
+	    GET a address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes
+	    GET b address=home code=brief paid=yes
+	    HEAD b address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes
+	    POST a address=home code=brief paid=yes
+	    GET c address=home code=brief paid=yes
+	    STOP
+	    }
+	    set resShort {1 2 ? 4 ? ? 7 8 ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	8     {set end {
+	    # Telling the server to close the connection.
+	    GET a
+	    GET b close=y
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    STOP
+	    }
+	    set resShort {1 ? 3 ? ? ? ? ? ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	9     {set end {
+	    # Telling the server to close the connection.
+	    GET a
+	    POST b close=y address=home code=brief paid=yes
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    STOP
+	    }
+	    set resShort {1 2 3 ? ? ? ? ? ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	10     {set end {
+	    # Telling the server to close the connection.
+	    GET a
+	    GET b close=y
+	    POST c address=home code=brief paid=yes
+	    GET a
+	    GET b
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    STOP
+	    }
+	    set resShort {1 ? 3 ? ? ? ? ? ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	11    {set end {
+	    # Telling the server to close the connection twice.
+	    GET a
+	    GET b close=y
+	    GET c
+	    GET a
+	    GET b close=y
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    STOP
+	    }
+	    set resShort {1 ? 3 ? ? 6 ? ? ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	12    {set end {
+	    # Telling the server to delay before sending the response.
+	    GET a
+	    GET b delay=1
+	    GET c
+	    GET a
+	    GET b
+	    STOP
+	    }
+	    set resShort {1 ? ? ? ?}
+	    set resLong  {1 2 3 4 5}
+	}
+
+	13    {set end {
+	    # Making the server close the connection (time out).
+	    GET a
+	    WAIT 2000
+	    GET b
+	    GET c
+	    GET a
+	    GET b
+	    STOP
+	    }
+	    set resShort {1 2 ? ? ?}
+	    set resLong  {1 2 3 4 5}
+	}
+
+	14    {set end {
+	    # Making the server close the connection (time out) twice.
+	    GET a
+	    WAIT 2000
+	    GET b
+	    GET c
+	    GET a
+	    WAIT 2000
+	    GET b
+	    GET c
+	    GET a
+	    GET b
+	    GET c
+	    STOP
+	    }
+	    set resShort {1 2 ? ? 5 ? ? ? ?}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	15    {set end {
+	    POST a address=home code=brief paid=yes
+	    POST b address=home code=brief paid=yes close=y delay=1
+	    POST c address=home code=brief paid=yes delay=1
+	    POST a address=home code=brief paid=yes close=y
+	    WAIT 2000
+	    POST b address=home code=brief paid=yes delay=1
+	    POST c address=home code=brief paid=yes close=y
+	    POST a address=home code=brief paid=yes
+	    POST b address=home code=brief paid=yes close=y
+	    POST c address=home code=brief paid=yes
+	    STOP
+	    }
+	    set resShort {1 2 3 4 5 6 7 8 9}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	16    {set end {
+	    POST a address=home code=brief paid=yes
+	    GET b address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes close=y
+	    GET a address=home code=brief paid=yes
+	    GET b address=home code=brief paid=yes close=y
+	    POST c address=home code=brief paid=yes
+	    WAIT 2000
+	    POST a address=home code=brief paid=yes
+	    HEAD b address=home code=brief paid=yes close=y
+	    GET c address=home code=brief paid=yes
+	    STOP
+	    }
+	    set resShort {1 ? 3 4 ? 6 7 ? 9}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+	17    {set end {
+	    GET b address=home code=brief paid=yes
+	    POST a address=home code=brief paid=yes
+	    GET a address=home code=brief paid=yes
+	    POST c address=home code=brief paid=yes close=y
+	    GET b address=home code=brief paid=yes
+	    HEAD b address=home code=brief paid=yes close=y
+	    POST c address=home code=brief paid=yes
+	    WAIT 2000
+	    POST a address=home code=brief paid=yes
+	    WAIT 2000
+	    GET c address=home code=brief paid=yes
+	    STOP
+	    }
+	    set resShort {1 2 3 4 5 ? 7 8 9}
+	    set resLong  {1 2 3 4 5 6 7 8 9}
+	}
+
+
+	18    {set end {
+	    REPOST 0
+	    GET a
+	    WAIT 2000
+	    POST b address=home code=brief paid=yes
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 2 ? ?}
+	    set resLong  {1 2 3 4}
+	    # resShort is overwritten below for the case ($te == 1).
+	}
+
+
+	19    {set end {
+	    REPOST 0
+	    GET a
+	    WAIT 2000
+	    GET b address=home code=brief paid=yes
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 2 ? ?}
+	    set resLong  {1 2 3 4}
+	}
+
+
+	20    {set end {
+	    POSTFRESH 1
+	    GET a
+	    WAIT 2000
+	    POST b address=home code=brief paid=yes
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 3 ?}
+	    set resLong  {1 3 4}
+	}
+
+
+	21    {set end {
+	    POSTFRESH 1
+	    GET a
+	    WAIT 2000
+	    GET b address=home code=brief paid=yes
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 2 ? ?}
+	    set resLong  {1 2 3 4}
+	}
+
+	22    {set end {
+	    GET a
+	    WAIT 2000
+	    KEEPALIVE 0
+	    POST b address=home code=brief paid=yes
+	    KEEPALIVE 1
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 3 ?}
+	    set resLong  {1 3 4}
+	}
+
+
+	23    {set end {
+	    GET a
+	    WAIT 2000
+	    KEEPALIVE 0
+	    GET b address=home code=brief paid=yes
+	    KEEPALIVE 1
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 3 ?}
+	    set resLong  {1 3 4}
+	}
+
+	24    {set end {
+	    GET a
+	    KEEPALIVE 0
+	    POST b address=home code=brief paid=yes
+	    KEEPALIVE 1
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 ? ?}
+	    set resLong  {1 3 4}
+	}
+
+
+	25    {set end {
+	    GET a
+	    KEEPALIVE 0
+	    GET b address=home code=brief paid=yes
+	    KEEPALIVE 1
+	    GET c
+	    GET a
+	    STOP
+	    }
+	    set resShort {1 ? ?}
+	    set resLong  {1 3 4}
+	}
+
+	default {
+	    return -code error {no matching script}
+	}
+    }
+
+
+    if {$ca < 3} {
+	# Not Keep-Alive.
+        set result "Passed all sanity checks."
+
+    } elseif {$ca == 3} {
+        # Keep-Alive, not pipelined.
+        set result {}
+        append result "Passed all sanity checks.\n"
+        append result "Have overlaps including response body:\n"
+
+    } else {
+        # Keep-Alive, pipelined: ($ca == 4)
+        set result {}
+        append result "Passed all sanity checks.\n"
+        append result "Overlap-free without response body:\n"
+        append result "$resShort"
+    }
+
+    # - The special case of test *.18*-testEof needs test results to be
+    #   individually written.
+    # - These test -repost 0 when there is a POST to apply it to, and the server
+    #   timeout has not been detected.
+    if {($cb == 18) && ($te == 1)} {
+        if {$ca < 3} {
+	    # Not Keep-Alive.
+	    set result "Passed all sanity checks."
+
+	} elseif {$ca == 3 && $delay == 0} {
+	    # Keep-Alive, not pipelined.
+            set result [MakeMessage {
+		|Problems with sanity checks:
+		|Wrong sequence for token ::http::2 - {A B C D X X X}
+		|- and error(s) X
+		|Wrong sequence for token ::http::3 - {A X X}
+		|- and error(s) X
+		|Wrong sequence for token ::http::4 - {A X X X}
+		|- and error(s) X
+		|
+		|Have overlaps including response body:
+		|
+	    }]
+
+	} elseif {$ca == 3} {
+	    # Keep-Alive, not pipelined.
+            set result [MakeMessage {
+		|Problems with sanity checks:
+		|Wrong sequence for token ::http::2 - {A B C D X X X}
+		|- and error(s) X
+		|
+		|Have overlaps including response body:
+		|
+	    }]
+
+	} elseif {$delay == 0} {
+	    # Keep-Alive, pipelined: ($ca == 4)
+            set result [MakeMessage {
+		|Problems with sanity checks:
+		|Wrong sequence for token ::http::2 - {A B C D X X X}
+		|- and error(s) X
+		|Wrong sequence for token ::http::3 - {A X X}
+		|- and error(s) X
+		|Wrong sequence for token ::http::4 - {A X X X}
+		|- and error(s) X
+		|
+		|Overlap-free without response body:
+		|
+	    }]
+
+	} else {
+            set result [MakeMessage {
+		|Problems with sanity checks:
+		|Wrong sequence for token ::http::2 - {A B C D X X X}
+		|- and error(s) X
+		|
+		|Overlap-free without response body:
+		|
+	    }]
+
+        }
+    }
+
+    return [list "$start$middle$end" $result]
+}
+
+# ------------------------------------------------------------------------------
+#  Proc MakeMessage
+# ------------------------------------------------------------------------------
+# WHD's one-line command to generate multi-line strings from readable code.
+#
+# Example:
+#   set blurb [MakeMessage {
+#            |This command allows multi-line strings to be created with readable
+#            |code, and without breaking the rules for indentation.
+#            |
+#            |The command shifts the entire block of text to the left, omitting
+#            |the pipe character and the spaces to its left.
+#   }]
+# ------------------------------------------------------------------------------
+
+proc MakeMessage {in} {
+    regsub -all -line {^\s*\|} [string trim $in] {}
+    # N.B. Implicit Return.
+}
+
+
+proc ReturnTestScript {ca cb delay te} {
+    lassign [ReturnTestScriptAndResult $ca $cb $delay $te] script result
+    return $script
+}
+
+proc ReturnTestResult {ca cb delay te} {
+    lassign [ReturnTestScriptAndResult $ca $cb $delay $te] script result
+    return $result
+}
+
+
+# ------------------------------------------------------------------------------
+# (2) Command to run a test script and use httpTest to analyse the logs.
+# ------------------------------------------------------------------------------
+
+namespace import httpTestScript::runHttpTestScript
+namespace import httpTestScript::cleanupHttpTestScript
+namespace import httpTest::cleanupHttpTest
+namespace import httpTest::logAnalyse
+namespace import httpTest::setHttpTestOptions
+
+proc RunTest {header footer delay te} {
+    set num [runHttpTestScript [ReturnTestScript $header $footer $delay $te]]
+    set skipOverlaps 0
+    set notPiped    {}
+    set notIncluded {}
+
+    # --------------------------------------------------------------------------
+    # Custom code for specific tests
+    # --------------------------------------------------------------------------
+    if {$header < 3} {
+        set skipOverlaps 1
+        for {set i 1} {$i <= $num} {incr i} {
+	    lappend notPiped $i
+        }
+    } elseif {$header > 2 && $footer == 18 && $te == 1} {
+        set skipOverlaps 1
+        if {$delay == 0} {
+	    # Transaction 1 is conventional.
+	    # Check that transactions 2,3,4 are cancelled.
+	    set notPiped {1}
+	    set notIncluded $notPiped
+        } else {
+	    # Transaction 1 is conventional.
+	    # Check that transaction 2 is cancelled.
+	    # The timing of transactions 3 and 4 is uncertain.
+	    set notPiped {1 3 4}
+	    set notIncluded $notPiped
+	}
+    } elseif {$footer in {20 22 23 24 25}} {
+	# Transaction 2 uses its own socket.
+	set notPiped    2
+	set notIncluded $notPiped
+    } else {
+    }
+    # --------------------------------------------------------------------------
+    # End of custom code for specific tests
+    # --------------------------------------------------------------------------
+
+
+    set Results [logAnalyse $num $skipOverlaps $notIncluded $notPiped]
+    lassign $Results msg cleanE cleanF dirtyE dirtyF
+    if {$msg eq {}} {
+        set msg "Passed all sanity checks."
+    } else {
+        set msg "Problems with sanity checks:\n$msg"
+    }
+
+    if 0 {
+        puts $msg
+        puts "Overlap-free including response body:\n$cleanF"
+        puts "Have overlaps including response body:\n$dirtyF"
+        puts "Overlap-free without response body:\n$cleanE"
+        puts "Have overlaps without response body:\n$dirtyE"
+    }
+
+    if {$header < 3} {
+        # No ordering, just check that transactions all finish
+        set result $msg
+    } elseif {$header == 3} {
+        # Not pipelined - check overlaps with response body.
+        set result "$msg\nHave overlaps including response body:\n$dirtyF"
+    } else {
+        # Pipelined - check overlaps without response body.  Check that the
+        # first request, the first requests after replay, and POSTs are clean.
+        set result "$msg\nOverlap-free without response body:\n$cleanE"
+    }
+    set ::nTokens $num
+    return $result
+}
+
+
+# ------------------------------------------------------------------------------
+# (3) VERBOSITY CONTROL
+# ------------------------------------------------------------------------------
+# If tests fail, run an individual test with -verbose 1 or 2 for diagnosis.
+# If still obscure, uncomment #Log and ##Log lines in the http package.
+# ------------------------------------------------------------------------------
+
+setHttpTestOptions -verbose 0
+
+# ------------------------------------------------------------------------------
+# (4) Define the base URLs used for testing.  Each must have a query string.
+# ------------------------------------------------------------------------------
+# - A HTTP/1.1 server is required.  It should be configured to provide
+#   persistent connections when requested to do so, and to close these
+#   connections if they are idle for one second.
+# - The resource must be served with status 200 in response to a valid GET or
+#   POST.
+# - The value of "page" is always specified in the query-string. Different
+#   resources for the three values of "page" allow testing of both chunked and
+#   unchunked transfer encoding.
+# - The variables "close" and "delay" may be specified in the query-string (for
+#   a GET) or the request body (for a POST).
+#   - "delay" is a numerical value in seconds, and causes the server to delay
+#     the response, including headers.
+#   - "close", if it has the value "y", instructs the server to close the
+#     connection ater the current request.
+# - Any other variables should be ignored.
+# ------------------------------------------------------------------------------
+
+namespace eval ::httpTestScript {
+    variable URL
+    array set URL {
+        a  http://test-tcl-http.kerlin.org/index.html?page=privacy
+        b  http://test-tcl-http.kerlin.org/index.html?page=conditions
+        c  http://test-tcl-http.kerlin.org/index.html?page=welcome
+    }
+}
+
+
+# ------------------------------------------------------------------------------
+# (5) Define the tests
+# ------------------------------------------------------------------------------
+# Constraints:
+# - serverNeeded - the URLs defined at (4) must be available, and must have the
+#                  properties specified there.
+# - duplicate    - the value of -pipeline does not matter if -keepalive 0
+# - timeout1s    - tests that work correctly only if the server closes
+#                  persistent connections after one second.
+#
+# Server timeout of persistent connections should be 1s.  Delays of 2s are
+# intended to cause timeout.
+# Servers are usually configured to use a longer timeout: this will cause the
+# tests to fail.  The "2000" could be replaced with a larger number, but the
+# tests will then be inconveniently slow.
+# ------------------------------------------------------------------------------
+
+#testConstraint serverNeeded 1
+#testConstraint timeout1s 1
+#testConstraint duplicate 1
+
+# ------------------------------------------------------------------------------
+#  Proc SetTestEof - to edit the command ::http::KeepSocket
+# ------------------------------------------------------------------------------
+# The usual line in command ::http::KeepSocket is "    set TEST_EOF 0".
+# Whether the value set in the file is 0 or 1, change it here to the value
+# specified by the argument.
+#
+# It is worth doing all tests for both values of the argument.
+#
+# test 0  - ::http::KeepSocket is unchanged, detects server eof where possible
+#           and closes the connection.
+# test 1  - ::http::KeepSocket is edited, does not detect server eof, so the
+#           reaction to finding server eof can be tested without the difficulty
+#           of testing in the few milliseconds of an asynchronous close event.
+# ------------------------------------------------------------------------------
+
+proc SetTestEof {test} {
+    set body [info body ::http::KeepSocket]
+    set subs "    set TEST_EOF $test"
+    set count [regsub -line -all -- {^\s*set TEST_EOF .*$} $body $subs newBody]
+    if {$count != 1} {
+        return -code error {proc ::http::KeepSocket has unexpected form}
+    }
+    proc ::http::KeepSocket {token} $newBody
+    return
+}
+
+for {set header 1} {$header <= 4} {incr header} {
+    if {$header == 4} {
+	setHttpTestOptions -dotted 1
+	set match glob
+    } else {
+	setHttpTestOptions -dotted 0
+	set match exact
+    }
+
+    if {$header == 2} {
+        set cons0 {serverNeeded duplicate}
+    } else {
+        set cons0 serverNeeded
+    }
+
+    for {set footer 1} {$footer <= 25} {incr footer} {
+        foreach {delay label} {
+	       0 a
+	       1 b
+	       2 c
+	       3 d
+	       5 e
+	       8 f
+	      12 g
+	     100 h
+	     500 i
+	    2000 j
+	} {
+	  foreach te {0 1} {
+	    if {$te} {
+	        set tag testEof
+	    } else {
+	        set tag normal
+	    }
+	    set suffix {}
+	    set cons $cons0
+
+	    # ------------------------------------------------------------------
+	    # Custom code for individual tests
+	    # ------------------------------------------------------------------
+	    if {$footer in {18}} {
+		# Custom code:
+		if {($label eq "j") && ($te == 1)} {
+		    continue
+		}
+		if {$te == 1} {
+		    # The test (of REPOST 0) is useful if tag is "testEof"
+		    # (server timeout without client reaction).  The same test
+		    # has a different result if tag is "normal".
+
+		    set suffix " - extra test for -repost 0 - ::http::2 must be"
+		    append suffix " cancelled"
+		    if {($delay == 0)} {
+			append suffix ", along with  ::http::3  ::http::4 if"
+			append suffix " the test creates these before ::http::2"
+			append suffix " is cancelled"
+		    }
+		} else {
+		}
+	    } elseif {$footer in {19}} {
+		set suffix " - extra test for -repost 0"
+	    } elseif {$footer in {20 21}} {
+		set suffix " - extra test for -postfresh 1"
+		if {($footer == 20)} {
+		    append suffix " - ::http::2 uses a separate socket"
+		    append suffix ", other requests use a persistent connection"
+		}
+	    } elseif {$footer in {22 23 24 25}} {
+		append suffix " - ::http::2 uses a separate socket"
+		append suffix ", other requests use a persistent connection"
+	    } else {
+	    }
+
+	    if {($footer >= 13 && $footer <= 23)} {
+		# Test use WAIT and depend on server timeout before this time.
+		lappend cons timeout1s
+	    }
+	    # ------------------------------------------------------------------
+	    # End of custom code.
+	    # ------------------------------------------------------------------
+
+            set name "pipeline test header $header footer $footer delay $delay $tag$suffix"
+
+
+	    # Here's the test:
+            test httpPipeline-${header}.${footer}${label}-${tag} $name \
+            -constraints $cons \
+            -setup [string map [list TE $te] {
+		# Restore default values for tests:
+		http::config -pipeline 1 -postfresh 0 -repost 1
+                http::init
+                set http::http(uid) 0
+		SetTestEof {TE}
+	    }] -body [list RunTest $header $footer $delay $te] -cleanup {
+		# Restore default values for tests:
+		http::config -pipeline 1 -postfresh 0 -repost 1
+		cleanupHttpTestScript
+		SetTestEof 0
+		cleanupHttpTest
+		after 2000
+		# Wait for persistent sockets on the server to time out.
+	    } -result [ReturnTestResult $header $footer $delay $te] -match $match
+
+
+	  }
+
+	}
+    }
+}
+
+# ------------------------------------------------------------------------------
+# (*) Notes on tests *.18*-testEof, *.19*-testEof - these test -repost 0
+# ------------------------------------------------------------------------------
+# These tests are a bit awkward because the main test kit analyses whether all
+# requests are satisfied, with retries if necessary, and it has result analysis
+# for processing retry logs.
+# - *.18*-testEof tests that certain requests are NOT satisfied, so the analysis
+#   is a one-off.
+# - Tests *.18a-testEof depend on client/server timing - the test needs to call
+#   http::geturl for all requests before the POST (request 2) is cancelled.
+#   We test that requests 2, 3, 4 are all cancelled.
+# - Other tests *.18*-testEof may not request 3 and 4 in time for the to be
+#   added to the write queue before request 2 is completed. We simply check that
+#   request 2 is cancelled.
+# - The behaviour is different if all connections are allowed to time out
+#   (label "j").  This case is not needed to test -repost 0, and is omitted.
+# - Tests *.18*-normal and *.19* are conventional (-repost 0 should have no
+#   effect).
+# ------------------------------------------------------------------------------
+
+
+unset header footer delay label suffix match cons name te
+namespace delete ::httpTest
+namespace delete ::httpTestScript
+
+::tcltest::cleanupTests
diff --git a/tests/httpTest.tcl b/tests/httpTest.tcl
new file mode 100644
index 0000000..326b361
--- /dev/null
+++ b/tests/httpTest.tcl
@@ -0,0 +1,505 @@
+# httpTest.tcl
+#
+#	Test HTTP/1.1 concurrent requests including
+#	queueing, pipelining and retries.
+#
+# Copyright (C) 2018 Keith Nash <kjnash@users.sourceforge.net>
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+# ------------------------------------------------------------------------------
+# "Package" httpTest for analysis of Log output of http requests.
+# ------------------------------------------------------------------------------
+# This is a specialised test kit for examining the presence, ordering, and
+# overlap of multiple HTTP transactions over a persistent ("Keep-Alive")
+# connection; and also for testing reconnection in accordance with RFC 7230 when
+# the connection is lost.
+#
+# This kit is probably not useful for other purposes.  It depends on the
+# presence of specific Log commands in the http library, and it interprets the
+# logs that these commands create.
+# ------------------------------------------------------------------------------
+
+package require http
+
+namespace eval ::http {
+    variable TestStartTimeInMs [clock milliseconds]
+#    catch {puts stdout "Start time (zero ms) is $TestStartTimeInMs"}
+}
+
+namespace eval ::httpTest {
+    variable testResults {}
+    variable testOptions
+    array set testOptions {
+        -verbose 0
+        -dotted  1
+    }
+    # -verbose - 0 quiet 1 write to stdout 2 write more
+    # -dotted  - (boolean) use dots for absences in lists of transactions
+}
+
+proc httpTest::Puts {txt} {
+    variable testOptions
+    if {$testOptions(-verbose) > 0} {
+        puts stdout $txt
+        flush stdout
+    }
+    return
+}
+
+# http::Log
+#
+# A special-purpose logger used for running tests.
+# - Processes Log calls that have "^" in their arguments, and records them in
+#   variable ::httpTest::testResults.
+# - Also writes them to stdout (using Puts) if ($testOptions(-verbose) > 0).
+# - Also writes Log calls that do not have "^", if ($testOptions(-verbose) > 1).
+
+proc http::Log {args} {
+    variable TestStartTimeInMs
+    set time [expr {[clock milliseconds] - $TestStartTimeInMs}]
+    set txt [list $time {*}$args]
+    if {[string first ^ $txt] != -1} {
+        ::httpTest::LogRecord $txt
+        ::httpTest::Puts $txt
+    } elseif {$::httpTest::testOptions(-verbose) > 1} {
+        ::httpTest::Puts $txt
+    }
+    return
+}
+
+
+# Called by http::Log (the "testing" version) to record logs for later analysis.
+
+proc httpTest::LogRecord {txt} {
+    variable testResults
+
+    set pos [string first ^ $txt]
+    set len [string length  $txt]
+    if {$pos > $len - 3} {
+        puts stdout "Logging Error: $txt"
+        puts stdout "Fix this call to Log in http-*.tm so it has ^ then\
+		a letter then a numeral."
+        flush stdout
+    } elseif {$pos == -1} {
+        # Called by mistake.
+    } else {
+        set letter [string index $txt [incr pos]]
+        set number [string index $txt [incr pos]]
+        # Max 9 requests!
+        lappend testResults [list $letter $number]
+    }
+
+    return
+}
+
+
+# ------------------------------------------------------------------------------
+# Commands for analysing the logs recorded when calling http::geturl.
+# ------------------------------------------------------------------------------
+
+# httpTest::TestOverlaps --
+#
+# The main test for correct behaviour of pipelined and sequential
+# (non-pipelined) transactions.  Other tests should be run first to detect
+# any inconsistencies in the data (e.g. absence of the elements that are
+# examined here).
+#
+# Examine the sequence $someResults for each transaction from 1 to $n,
+# ignoring any that are listed in $badTrans.
+# Determine whether the elements "B" to $term for one transaction overlap
+# elements "B" to $term for the previous and following transactions.
+#
+# Transactions in the list $badTrans are not included in "clean" or
+# "dirty", but their possible overlap with other transactions is noted.
+# Transactions in the list $notPiped are a subset of $badTrans, and
+# their possible overlap with other transactions is NOT noted.
+#
+# Arguments:
+# someResults - list of results, each of the form {letter numeral}
+# n           - number of HTTP transactions
+# term        - letter that indicated end of search range. "E" for testing
+#               overlaps from start of request to end of response headers.
+#               "F" to extend to the end of the response body.
+# msg         - the cumulative message from sanity checks.  Append to it only
+#               to report a test failure.
+# badTrans    - list of transaction numbers not to be assessed as "clean" or
+#               "dirty"
+# notPiped    - subset of badTrans.  List of transaction numbers that cannot
+#               taint another transaction by overlapping with it, because it
+#               used a different socket.
+#
+# Return value: [list $msg $clean $dirty]
+# msg   - warning messages: nothing will be appended to argument $msg if there
+#         is an error with the test.
+# clean - list of transactions that have no overlap with other transactions
+# dirty - list of transactions that have YES overlap with other transactions
+
+proc httpTest::TestOverlaps {someResults n term msg badTrans notPiped} {
+    variable testOptions
+
+    # Check whether transactions overlap:
+    set clean {}
+    set dirty {}
+    for {set i 1} {$i <= $n} {incr i} {
+        if {$i in $badTrans} {
+            continue
+        }
+        set myStart   [lsearch -exact $someResults [list B $i]]
+        set myEnd     [lsearch -exact $someResults [list $term $i]]
+
+        if {($myStart == -1 || $myEnd == -1)} {
+            set res "Cannot find positions of transaction $i"
+	    append msg $res \n
+	    Puts $res
+        }
+
+	set overlaps {}
+	for {set j $myStart} {$j <= $myEnd} {incr j} {
+	    lassign [lindex $someResults $j] letter number
+	    if {$number != $i && $letter ne "A" && $number ni $notPiped} {
+		lappend overlaps $number
+	    }
+	}
+
+        if {[llength $overlaps] == 0} {
+	    set res "Transaction $i has no overlaps"
+	    Puts $res
+	    lappend clean $i
+	    if {$testOptions(-dotted)} {
+		# N.B. results from different segments are concatenated.
+		lappend dirty .
+	    } else {
+	    }
+        } else {
+	    set res "Transaction $i overlaps with [join $overlaps { }]"
+	    Puts $res
+	    lappend dirty $i
+	    if {$testOptions(-dotted)} {
+		# N.B. results from different segments are concatenated.
+		lappend clean .
+	    } else {
+	    }
+        }
+    }
+    return [list $msg $clean $dirty]
+}
+
+# httpTest::PipelineNext --
+#
+# Test whether prevPair, pair are valid as consecutive elements of a pipelined
+# sequence (Start 1), (End 1), (Start 2), (End 2) ...
+# Numbers are integers increasing (by 1 if argument "any" is false), and need
+# not begin with 1.
+# The first element of the sequence has prevPair {} and is always passed as
+# valid.
+#
+# Arguments;
+# Start        - string that labels the start of a segment
+# End          - string that labels the end of a segment
+# prevPair     - previous "pair" (list of string and number) element of a
+#                sequence, or {} if argument "pair" is the first in the
+#                sequence.
+# pair         - current "pair" (list of string and number) element of a
+#                sequence
+# any          - (boolean) iff true, accept any increasing sequence of integers.
+#                If false, integers must increase by 1.
+#
+# Return value - boolean, true iff the two pairs are valid consecutive elements.
+
+proc httpTest::PipelineNext {Start End prevPair pair any} {
+    if {$prevPair eq {}} {
+        return 1
+    }
+
+    lassign $prevPair letter number
+    lassign $pair newLetter newNumber
+    if {$letter eq $Start} {
+	return [expr {($newLetter eq $End) && ($newNumber == $number)}]
+    } elseif {$any} {
+        set nxt [list $Start [expr {$number + 1}]]
+	return [expr {($newLetter eq $Start) && ($newNumber > $number)}]
+    } else {
+        set nxt [list $Start [expr {$number + 1}]]
+	return [expr {($newLetter eq $Start) && ($newNumber == $number + 1)}]
+    }
+}
+
+# httpTest::TestPipeline --
+#
+# Given a sequence of "pair" elements, check that the elements whose string is
+# $Start or $End form a valid pipeline. Ignore other elements.
+#
+# Return value: {} if valid pipeline, otherwise a non-empty error message.
+
+proc httpTest::TestPipeline {someResults n Start End msg desc badTrans} {
+    set sequence {}
+    set prevPair {}
+    set ok 1
+    set any [llength $badTrans]
+    foreach pair $someResults {
+        lassign $pair letter number
+        if {($letter in [list $Start $End]) && ($number ni $badTrans)} {
+            lappend sequence $pair
+            if {![PipelineNext $Start $End $prevPair $pair $any]} {
+		set ok 0
+		break
+            }
+            set prevPair $pair
+        }
+    }
+
+    if {!$ok} {
+        set res "$desc are not pipelined: {$sequence}"
+        append msg $res \n
+        Puts $res
+    }
+    return $msg
+}
+
+# httpTest::TestSequence --
+#
+# Examine each transaction from 1 to $n, ignoring any that are listed
+# in $badTrans.
+# Check that each transaction has elements A to F, in alphabetical order.
+
+proc httpTest::TestSequence {someResults n msg badTrans} {
+    variable testOptions
+
+    for {set i 1} {$i <= $n} {incr i} {
+        if {$i in $badTrans} {
+	    continue
+        }
+        set sequence {}
+        foreach pair $someResults {
+            lassign $pair letter number
+            if {$number == $i} {
+                lappend sequence $letter
+            }
+        }
+        if {$sequence eq {A B C D E F}} {
+        } else {
+            set res "Wrong sequence for token ::http::$i - {$sequence}"
+	    append msg $res \n
+	    Puts $res
+            if {"X" in $sequence} {
+                set res "- and error(s) X"
+		append msg $res \n
+		Puts $res
+            }
+            if {"Y" in $sequence} {
+                set res "- and warnings(s) Y"
+		append msg $res \n
+		Puts $res
+            }
+        }
+    }
+    return $msg
+}
+
+#
+# Arguments:
+# someResults  - list of elements, each a list of a letter and a number
+# n            - (positive integer) the number of HTTP requests
+# msg          - accumulated warning messages
+# skipOverlaps - (boolean) whether to skip testing of transaction overlaps
+# badTrans     - list of transaction numbers not to be assessed as "clean" or
+#                "dirty" by their overlaps
+#   for 1/2 includes all transactions
+#   for 3/4 includes an increasing (with recursion) set that will not be included in the list because they are already handled.
+# notPiped     - subset of badTrans.  List of transaction numbers that cannot
+#                taint another transaction by overlapping with it, because it
+#                used a different socket.
+#
+# Return value: [list $msg $cleanE $cleanF $dirtyE $dirtyF]
+# msg    - warning messages: nothing will be appended to argument $msg if there
+#          is no error with the test.
+# cleanE - list of transactions that have no overlap with other transactions
+#          (not considering response body)
+# dirtyE - list of transactions that have YES overlap with other transactions
+#          (not considering response body)
+# cleanF - list of transactions that have no overlap with other transactions
+#          (including response body)
+# dirtyF - list of transactions that have YES overlap with other transactions
+#          (including response body)
+
+proc httpTest::MostAnalysis {someResults n msg skipOverlaps badTrans notPiped} {
+    variable testOptions
+
+    # Check that stages for "good" transactions are all present and correct:
+    set msg [TestSequence $someResults $n $msg $badTrans]
+
+    # Check that requests are pipelined:
+    set msg [TestPipeline $someResults $n B C $msg Requests $notPiped]
+
+    # Check that responses are pipelined:
+    set msg [TestPipeline $someResults $n D F $msg Responses $notPiped]
+
+    if {$skipOverlaps} {
+	set cleanE {}
+	set dirtyE {}
+	set cleanF {}
+	set dirtyF {}
+    } else {
+	Puts "Overlaps including response body (test for non-pipelined case)"
+	lassign [TestOverlaps $someResults $n F $msg $badTrans $notPiped] msg cleanF dirtyF
+
+	Puts "Overlaps without response body (test for pipelined case)"
+	lassign [TestOverlaps $someResults $n E $msg $badTrans $notPiped] msg cleanE dirtyE
+    }
+
+    return [list $msg $cleanE $cleanF $dirtyE $dirtyF]
+}
+
+# httpTest::ProcessRetries --
+#
+# Command to examine results for socket-changing records [PQR],
+# divide the results into segments for each connection, and analyse each segment
+# individually.
+# (Could add $sock to the logging to simplify this, but never mind.)
+#
+# In each segment, identify any transactions that are not included, and
+# any that are aborted, to assist subsequent testing.
+#
+# Prepend A records (socket-independent) to each segment for transactions that
+# were scheduled (by A) but not completed (by F).  Pass each segment to
+# MostAnalysis for processing.
+
+proc httpTest::ProcessRetries {someResults n msg skipOverlaps notIncluded notPiped} {
+    variable testOptions
+
+    set nextRetry [lsearch -glob -index 0 $someResults {[PQR]}]
+    if {$nextRetry == -1} {
+        return [MostAnalysis $someResults $n $msg $skipOverlaps $notIncluded $notPiped]
+    }
+    set badTrans $notIncluded
+    set tryCount 0
+    set try $nextRetry
+    incr tryCount
+    lassign [lindex $someResults $try] letter number
+    Puts "Processing retry [lindex $someResults $try]"
+    set beforeTry [lrange $someResults 0 $try-1]
+    Puts [join $beforeTry \n]
+    set afterTry [lrange $someResults $try+1 end]
+
+    set dummyTry   {}
+    for {set i 1} {$i <= $n} {incr i} {
+        set first [lsearch -exact $beforeTry [list A $i]]
+        set last  [lsearch -exact $beforeTry [list F $i]]
+        if {$first == -1} {
+	    set res "Transaction $i was not started in connection number $tryCount"
+	    # So lappend it to badTrans and don't include it in the call below of MostAnalysis.
+	    # append msg $res \n
+	    Puts $res
+	    if {$i ni $badTrans} {
+		lappend badTrans $i
+	    } else {
+	    }
+        } elseif {$last == -1} {
+	    set res "Transaction $i was started but unfinished in connection number $tryCount"
+	    # So lappend it to badTrans and don't include it in the call below of MostAnalysis.
+	    # append msg $res \n
+	    Puts $res
+	    lappend badTrans $i
+	    lappend dummyTry [list A $i]
+        } else {
+	    set res "Transaction $i was started and finished in connection number $tryCount"
+	    # So include it in the call below of MostAnalysis.
+	    # So lappend it to notIncluded and don't include it in the recursive call of
+	    # ProcessRetries which handles the later connections.
+	    # append msg $res \n
+	    Puts $res
+	    lappend notIncluded $i
+        }
+    }
+
+    # Analyse the part of the results before the first replay:
+    set HeadResults [MostAnalysis $beforeTry $n $msg $skipOverlaps $badTrans $notPiped]
+    lassign $HeadResults msg cleanE1 cleanF1 dirtyE1 dirtyF1
+
+    # Pass the rest of the results to be processed recursively.
+    set afterTry [concat $dummyTry $afterTry]
+    set TailResults [ProcessRetries $afterTry $n $msg $skipOverlaps $notIncluded $notPiped]
+    lassign $TailResults msg cleanE2 cleanF2 dirtyE2 dirtyF2
+
+    set cleanE [concat $cleanE1 $cleanE2]
+    set cleanF [concat $cleanF1 $cleanF2]
+    set dirtyE [concat $dirtyE1 $dirtyE2]
+    set dirtyF [concat $dirtyF1 $dirtyF2]
+    return [list $msg $cleanE $cleanF $dirtyE $dirtyF]
+}
+
+# httpTest::logAnalyse --
+#
+#	The main command called to analyse logs for a single test.
+#
+# Arguments:
+# n            - (positive integer) the number of HTTP requests
+# skipOverlaps - (boolean) whether to skip testing of transaction overlaps
+# notIncluded  - list of transaction numbers not to be assessed as "clean" or
+#                "dirty" by their overlaps
+# notPiped     - subset of notIncluded.  List of transaction numbers that cannot
+#                taint another transaction by overlapping with it, because it
+#                used a different socket.
+#
+# Return value: [list $msg $cleanE $cleanF $dirtyE $dirtyF]
+# msg    - warning messages: {} if there is no error with the test.
+# cleanE - list of transactions that have no overlap with other transactions
+#          (not considering response body)
+# dirtyE - list of transactions that have YES overlap with other transactions
+#          (not considering response body)
+# cleanF - list of transactions that have no overlap with other transactions
+#          (including response body)
+# dirtyF - list of transactions that have YES overlap with other transactions
+#          (including response body)
+
+proc httpTest::logAnalyse {n skipOverlaps notIncluded notPiped} {
+    variable testResults
+    variable testOptions
+
+    # Check that each data item has the correct form {letter numeral}.
+    set ii 0
+    set ok 1
+    foreach pair $testResults {
+	lassign $pair letter number
+	if {    [string match {[A-Z]} $letter]
+	     && [string match {[0-9]} $number]
+	} {
+	    # OK
+	} else {
+	    set ok 0
+	    set res "Error: testResults has bad element {$pair} at position $ii"
+	    append msg $res \n
+	    Puts $res
+	}
+	incr ii
+    }
+
+    if {!$ok} {
+	return $msg
+    }
+    set msg {}
+
+    Puts [join $testResults \n]
+    ProcessRetries $testResults $n $msg $skipOverlaps $notIncluded $notPiped
+    # N.B. Implicit Return.
+}
+
+proc httpTest::cleanupHttpTest {} {
+    variable testResults
+    set testResults {}
+    return
+}
+
+proc httpTest::setHttpTestOptions {key args} {
+    variable testOptions
+    if {$key ni {-dotted -verbose}} {
+        return -code error {valid options are -dotted, -verbose}
+    }
+    set testOptions($key) {*}$args
+}
+
+namespace eval httpTest {
+    namespace export cleanupHttpTest logAnalyse setHttpTestOptions
+}
diff --git a/tests/httpTestScript.tcl b/tests/httpTestScript.tcl
new file mode 100644
index 0000000..a40449a
--- /dev/null
+++ b/tests/httpTestScript.tcl
@@ -0,0 +1,509 @@
+# httpTestScript.tcl
+#
+#	Test HTTP/1.1 concurrent requests including
+#	queueing, pipelining and retries.
+#
+# Copyright (C) 2018 Keith Nash <kjnash@users.sourceforge.net>
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+# ------------------------------------------------------------------------------
+# "Package" httpTestScript for executing test scripts written in a convenient
+# shorthand.
+# ------------------------------------------------------------------------------
+
+# ------------------------------------------------------------------------------
+# Documentation for "package" httpTestScript.
+# ------------------------------------------------------------------------------
+# To use the package:
+# (a) define URLs as the values of elements in the array ::httpTestScript
+# (b) define a script in terms of the commands
+#         START STOP DELAY KEEPALIVE WAIT PIPELINE GET HEAD POST
+#     referring to URLs by the name of the corresponding array element.  The
+#     script can include any other Tcl commands, and evaluates in the
+#     httpTestScript namespace.
+# (c) Use the command httpTestScript::runHttpTestScript to evaluate the script.
+# (d) For tcltest tests, wrap the runHttpTestScript call in a suitable "test"
+#     command.
+# ------------------------------------------------------------------------------
+# START
+# Must be the first command of the script.
+#
+# STOP
+# Must be present in the script to avoid waiting for client timeout.
+# Usually the last command, but can be elsewhere to end a script prematurely.
+# Subsequent httpTestScript commands will have no effect.
+#
+# DELAY ms
+# If there are no WAIT commands, this sets the delay in ms between subsequent
+# calls to http::geturl.  Default 500ms.
+#
+# KEEPALIVE
+# Set the value passed to http::geturl for the -keepalive option.  The command
+# applies to subsequent requests in the script. Default 1.
+#
+# WAIT ms
+# Pause for a time in ms before sending subsequent requests.
+#
+# PIPELINE boolean
+# Set the value of -pipeline using http::config.  The last PIPELINE command
+# in the script applies to every request. Default 1.
+#
+# POSTFRESH boolean
+# Set the value of -postfresh using http::config.  The last POSTFRESH command
+# in the script applies to every request. Default 0.
+#
+# REPOST boolean
+# Set the value of -repost using http::config.  The last REPOST command
+# in the script applies to every request. Default 1 for httpTestScript.
+# (Default value in http is 0).
+#
+# GET uriCode ?arg ...?
+# Send a HTTP request using the GET method.
+# Arguments:
+# uriCode - the code for the base URI - the value must be stored in
+#           ::httpTestScript::URL($uriCode).
+# args    - strings that will be joined by "&" and appended to the query
+#           string with a preceding "&".
+#
+# HEAD uriCode ?arg ...?
+# Send a HTTP request using the HEAD method.
+# Arguments: as for GET
+#
+# POST uriCode ?arg ...?
+# Send a HTTP request using the POST method.
+# Arguments:
+# uriCode - the code for the base URI - the value must be stored in
+#           ::httpTestScript::URL($uriCode).
+# args    - strings that will be joined by "&" and used as the request body.
+# ------------------------------------------------------------------------------
+
+namespace eval ::httpTestScript {
+    namespace export runHttpTestScript cleanupHttpTestScript
+}
+
+# httpTestScript::START --
+# Initialise, and create a long-stop timeout.
+
+proc httpTestScript::START {} {
+    variable CountRequestedSoFar
+    variable RequestsWhenStopped
+    variable KeepAlive
+    variable Delay
+    variable TimeOutCode
+    variable TimeOutDone
+    variable StartDone
+    variable StopDone
+    variable CountFinishedSoFar
+    variable RequestList
+    variable RequestsMade
+    variable ExtraTime
+    variable ActualKeepAlive
+
+    if {[info exists StartDone] && ($StartDone == 1)} {
+        set msg {START has been called twice without an intervening STOP}
+        return -code error $msg
+    }
+
+    set StartDone 1
+    set StopDone 0
+    set TimeOutDone 0
+    set CountFinishedSoFar 0
+    set CountRequestedSoFar 0
+    set RequestList {}
+    set RequestsMade {}
+    set ExtraTime 0
+    set ActualKeepAlive 1
+
+    # Undefined until a STOP command:
+    unset -nocomplain RequestsWhenStopped
+
+    # Default values:
+    set KeepAlive 1
+    set Delay 500
+
+    # Default values for tests:
+    KEEPALIVE 1
+    PIPELINE  1
+    POSTFRESH 0
+    REPOST    1
+
+    set TimeOutCode [after 30000 httpTestScript::TimeOutNow]
+#    set TimeOutCode [after 4000 httpTestScript::TimeOutNow]
+    return
+}
+
+# httpTestScript::STOP --
+# Do not process any more commands.  The commands will be executed but will
+# silently do nothing.
+
+proc httpTestScript::STOP {} {
+    variable CountRequestedSoFar
+    variable CountFinishedSoFar
+    variable RequestsWhenStopped
+    variable TimeOutCode
+    variable StartDone
+    variable StopDone
+    variable RequestsMade
+
+    if {$StopDone} {
+        # Don't do anything on a second call.
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    set StopDone 1
+    set StartDone 0
+    set RequestsWhenStopped $CountRequestedSoFar
+    unset -nocomplain StartDone
+
+    if {$CountFinishedSoFar == $RequestsWhenStopped} {
+        if {[info exists TimeOutCode]} {
+            after cancel $TimeOutCode
+        }
+        set ::httpTestScript::FOREVER 0
+    }
+    return
+}
+
+# httpTestScript::DELAY --
+# If there are no WAIT commands, this sets the delay in ms between subsequent
+# calls to http::geturl.  Default 500ms.
+
+proc httpTestScript::DELAY {t} {
+    variable StartDone
+    variable StopDone
+
+    if {$StopDone} {
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    variable Delay
+
+    set Delay $t
+    return
+}
+
+# httpTestScript::KEEPALIVE --
+# Set the value passed to http::geturl for the -keepalive option.  Default 1.
+
+proc httpTestScript::KEEPALIVE {b} {
+    variable StartDone
+    variable StopDone
+
+    if {$StopDone} {
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    variable KeepAlive
+    set KeepAlive $b
+    return
+}
+
+# httpTestScript::WAIT --
+# Pause for a time in ms before processing any more commands.
+
+proc httpTestScript::WAIT {t} {
+    variable StartDone
+    variable StopDone
+    variable ExtraTime
+
+    if {$StopDone} {
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    if {(![string is integer -strict $t]) || $t < 0} {
+        return -code error {argument to WAIT must be a non-negative integer}
+    }
+
+    incr ExtraTime $t
+
+    return
+}
+
+# httpTestScript::PIPELINE --
+# Pass a value to http::config -pipeline.
+
+proc httpTestScript::PIPELINE {b} {
+    variable StartDone
+    variable StopDone
+
+    if {$StopDone} {
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    ::http::config -pipeline $b
+    ##::http::Log http(-pipeline) is now [::http::config -pipeline]
+    return
+}
+
+# httpTestScript::POSTFRESH --
+# Pass a value to http::config -postfresh.
+
+proc httpTestScript::POSTFRESH {b} {
+    variable StartDone
+    variable StopDone
+
+    if {$StopDone} {
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    ::http::config -postfresh $b
+    ##::http::Log http(-postfresh) is now [::http::config -postfresh]
+    return
+}
+
+# httpTestScript::REPOST --
+# Pass a value to http::config -repost.
+
+proc httpTestScript::REPOST {b} {
+    variable StartDone
+    variable StopDone
+
+    if {$StopDone} {
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    ::http::config -repost $b
+    ##::http::Log http(-repost) is now [::http::config -repost]
+    return
+}
+
+# httpTestScript::GET --
+# Send a HTTP request using the GET method.
+# Arguments:
+# uriCode - the code for the base URI - the value must be stored in
+#           ::httpTestScript::URL($uriCode).
+# args    - strings that will each be preceded by "&" and appended to the query
+#           string.
+
+proc httpTestScript::GET {uriCode args} {
+    variable RequestList
+    lappend RequestList GET
+    RequestAfter $uriCode 0 {} {*}$args
+    return
+}
+
+# httpTestScript::HEAD --
+# Send a HTTP request using the HEAD method.
+# Arguments: as for GET
+
+proc httpTestScript::HEAD {uriCode args} {
+    variable RequestList
+    lappend RequestList HEAD
+    RequestAfter $uriCode 1 {} {*}$args
+    return
+}
+
+# httpTestScript::POST --
+# Send a HTTP request using the POST method.
+# Arguments:
+# uriCode - the code for the base URI - the value must be stored in
+#           ::httpTestScript::URL($uriCode).
+# args    - strings that will be joined by "&" and used as the request body.
+
+proc httpTestScript::POST {uriCode args} {
+    variable RequestList
+    lappend RequestList POST
+    RequestAfter $uriCode 0 {use} {*}$args
+    return
+}
+
+
+proc httpTestScript::RequestAfter {uriCode validate query args} {
+    variable CountRequestedSoFar
+    variable Delay
+    variable ExtraTime
+    variable StartDone
+    variable StopDone
+    variable KeepAlive
+
+    if {$StopDone} {
+        return
+    }
+
+    if {![info exists StartDone]} {
+        return -code error {initialise the script by calling command START}
+    }
+
+    incr CountRequestedSoFar
+    set idelay [expr {($CountRequestedSoFar - 1) * $Delay + 10 + $ExtraTime}]
+
+    # Could pass values of -pipeline, -postfresh, -repost if it were
+    # useful to change these mid-script.
+    after $idelay [list httpTestScript::Requester $uriCode $KeepAlive $validate $query {*}$args]
+    return
+}
+
+proc httpTestScript::Requester {uriCode keepAlive validate query args} {
+    variable URL
+
+    ::http::config -accept {*/*}
+
+    set absUrl $URL($uriCode)
+    if {$query eq {}} {
+	if {$args ne {}} {
+	    append absUrl & [join $args &]
+	}
+	set queryArgs {}
+    } elseif {$validate} {
+        return -code error {cannot have both -validate (HEAD) and -query (POST)}
+    } else {
+	set queryArgs [list -query [join $args &]]
+    }
+
+    if {[catch {
+        ::http::geturl     $absUrl        \
+                -validate  $validate      \
+                -timeout   10000          \
+                {*}$queryArgs             \
+                -keepalive $keepAlive     \
+                -command   ::httpTestScript::WhenFinished
+    } token]} {
+        set msg $token
+        catch {puts stdout "Error: $msg"}
+        return
+    } else {
+        # Request will begin.
+    }
+
+    return
+
+}
+
+proc httpTestScript::TimeOutNow {} {
+    variable TimeOutDone
+
+    set TimeOutDone 1
+    set ::httpTestScript::FOREVER 0
+    return
+}
+
+proc httpTestScript::WhenFinished {hToken} {
+    variable CountFinishedSoFar
+    variable RequestsWhenStopped
+    variable TimeOutCode
+    variable StopDone
+    variable RequestList
+    variable RequestsMade
+    variable ActualKeepAlive
+
+    upvar #0 $hToken state
+
+    if {[catch {
+	if {    [info exists state(transfer)]
+	     && ($state(transfer) eq "chunked")
+	} {
+	    set Trans chunked
+	} else {
+	    set Trans unchunked
+	}
+
+	if {    [info exists ::httpTest::testOptions(-verbose)]
+	     && ($::httpTest::testOptions(-verbose) > 0)
+	} {
+	    puts "Token    $hToken
+Response $state(http)
+Status   $state(status)
+Method   $state(method)
+Transfer $Trans
+Size     $state(currentsize)
+URL      $state(url)
+"
+	}
+
+	if {!$state(-keepalive)} {
+	    set ActualKeepAlive 0
+	}
+
+	if {[info exists state(method)]} {
+	    lappend RequestsMade $state(method)
+	} else {
+	    lappend RequestsMade UNKNOWN
+	}
+	set tk [namespace tail $hToken]
+
+	if {    ($state(http) != {HTTP/1.1 200 OK})
+	     || ($state(status) != {ok})
+	     || (($state(currentsize) == 0) && ($state(method) ne "HEAD"))
+	} {
+	    ::http::Log ^X$tk unexpected result Response $state(http) Status $state(status) Size $state(currentsize) - token $hToken
+	}
+    } err]} {
+	::http::Log ^X$tk httpTestScript::WhenFinished failed with error status: $err - token $hToken
+    }
+
+    incr CountFinishedSoFar
+    if {$StopDone && ($CountFinishedSoFar == $RequestsWhenStopped)} {
+        if {[info exists TimeOutCode]} {
+            after cancel $TimeOutCode
+        }
+        if {$RequestsMade ne $RequestList && $ActualKeepAlive} {
+	    ::http::Log ^X$tk unexpected result - Script asked for "{$RequestList}" but got "{$RequestsMade}" - token $hToken
+        }
+        set ::httpTestScript::FOREVER 0
+    }
+
+    return
+}
+
+
+proc httpTestScript::runHttpTestScript {scr} {
+    variable TimeOutDone
+    variable RequestsWhenStopped
+
+    after idle [list namespace eval ::httpTestScript $scr]
+    vwait ::httpTestScript::FOREVER
+    # N.B. does not automatically execute in this namespace, unlike some other events.
+    # Release when all requests have been served or have timed out.
+
+    if {$TimeOutDone} {
+        return -code error {test script timed out}
+    }
+
+    return $RequestsWhenStopped
+}
+
+
+proc httpTestScript::cleanupHttpTestScript {} {
+    variable TimeOutDone
+    variable RequestsWhenStopped
+
+    if {![info exists RequestsWhenStopped]} {
+	return -code error {Cleanup Failed: RequestsWhenStopped is undefined}
+    }
+
+    for {set i 1} {$i <= $RequestsWhenStopped} {incr i} {
+        http::cleanup ::http::$i
+    }
+
+    return
+}
diff --git a/tests/info.test b/tests/info.test
index 8176ad3..a12d45c 100644
--- a/tests/info.test
+++ b/tests/info.test
@@ -19,9 +19,9 @@ if {{::tcltest} ni [namespace children]} {
     package require tcltest 2
     namespace import -force ::tcltest::*
 }
-
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
+testConstraint zlib [llength [info commands zlib]]
 
 # Set up namespaces needed to test operation of "info args", "info body",
 # "info default", and "info procs" with imported procedures.
@@ -33,7 +33,7 @@ namespace eval test_ns_info1 {
     proc p {x} {return "x=$x"}
     proc q {{y 27} {z {}}} {return "y=$y"}
 }
-
+
 test info-1.1 {info args option} {
     proc t1 {a bbb c} {return foo}
     info args t1
@@ -110,7 +110,7 @@ test info-2.6 {info body option, returning list bodies} {
 proc testinfocmdcount {} {
     set x [info cmdcount]
     set y 12345
-    set z [info cm]
+    set z [info cmdc]
     expr {$z-$x}
 }
 test info-3.1 {info cmdcount compiled} {
@@ -119,7 +119,7 @@ test info-3.1 {info cmdcount compiled} {
 test info-3.2 {info cmdcount evaled} -body {
     set x [info cmdcount]
     set y 12345
-    set z [info cm]
+    set z [info cmdc]
     expr {$z-$x}
 } -cleanup {unset x y z} -result 4
 test info-3.3 {info cmdcount evaled} -body [info body testinfocmdcount] -cleanup {unset x y z} -result 4
@@ -678,16 +678,16 @@ test info-21.1 {miscellaneous error conditions} -returnCodes error -body {
 } -result {wrong # args: should be "info subcommand ?arg ...?"}
 test info-21.2 {miscellaneous error conditions} -returnCodes error -body {
     info gorp
-} -result {unknown or ambiguous subcommand "gorp": must be args, body, class, cmdcount, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
+} -result {unknown or ambiguous subcommand "gorp": must be args, body, class, cmdcount, cmdtype, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
 test info-21.3 {miscellaneous error conditions} -returnCodes error -body {
     info c
-} -result {unknown or ambiguous subcommand "c": must be args, body, class, cmdcount, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
+} -result {unknown or ambiguous subcommand "c": must be args, body, class, cmdcount, cmdtype, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
 test info-21.4 {miscellaneous error conditions} -returnCodes error -body {
     info l
-} -result {unknown or ambiguous subcommand "l": must be args, body, class, cmdcount, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
+} -result {unknown or ambiguous subcommand "l": must be args, body, class, cmdcount, cmdtype, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
 test info-21.5 {miscellaneous error conditions} -returnCodes error -body {
     info s
-} -result {unknown or ambiguous subcommand "s": must be args, body, class, cmdcount, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
+} -result {unknown or ambiguous subcommand "s": must be args, body, class, cmdcount, cmdtype, commands, complete, coroutine, default, errorstack, exists, frame, functions, globals, hostname, level, library, loaded, locals, nameofexecutable, object, patchlevel, procs, script, sharedlibextension, tclversion, or vars}
 
 ##
 # ### ### ### ######### ######### #########
@@ -2396,6 +2396,174 @@ test info-33.35 {{*}, literal, simple, bytecompiled} -body {
 } -result {type source line 2389 file info.test cmd {info frame 0} proc ::foo::bar level 0}
 
 # -------------------------------------------------------------------------
+namespace eval ::testinfocmdtype {
+    apply {cmds {
+	foreach c $cmds {rename $c {}}
+    } ::testinfocmdtype} [info commands ::testinfocmdtype::*]
+}
+test info-40.1 {info cmdtype: syntax} -body {
+    info cmdtype
+} -returnCodes error -result {wrong # args: should be "info cmdtype commandName"}
+test info-40.2 {info cmdtype: syntax} -body {
+    info cmdtype foo bar
+} -returnCodes error -result {wrong # args: should be "info cmdtype commandName"}
+test info-40.3 {info cmdtype: no such command} -body {
+    info cmdtype ::testinfocmdtype::foo
+} -returnCodes error -result {unknown command "::testinfocmdtype::foo"}
+test info-40.4 {info cmdtype: native commands} -body {
+    info cmdtype ::if
+} -result native
+test info-40.5 {info cmdtype: native commands} -body {
+    info cmdtype ::puts
+} -result native
+test info-40.6 {info cmdtype: native commands} -body {
+    info cmdtype ::yield
+} -result native
+test info-40.7 {info cmdtype: procedures} -setup {
+    proc ::testinfocmdtype::someproc {} {}
+} -body {
+    info cmdtype ::testinfocmdtype::someproc
+} -cleanup {
+    rename ::testinfocmdtype::someproc {}
+} -result proc
+test info-40.8 {info cmdtype: aliases} -setup {
+    interp alias {} ::testinfocmdtype::somealias {} ::puts
+} -body {
+    info cmdtype ::testinfocmdtype::somealias
+} -cleanup {
+    rename ::testinfocmdtype::somealias {}
+} -result alias
+test info-40.9 {info cmdtype: imports} -setup {
+    namespace eval ::testinfocmdtype {
+	namespace eval foo {
+	    proc bar {} {}
+	    namespace export bar
+	}
+	namespace import foo::bar
+    }
+} -body {
+    info cmdtype ::testinfocmdtype::bar
+} -cleanup {
+    rename ::testinfocmdtype::bar {}
+    namespace delete ::testinfocmdtype::foo
+} -result import
+test info-40.10 {info cmdtype: slaves} -setup {
+    apply {i {
+	rename $i ::testinfocmdtype::slave
+	variable ::testinfocmdtype::slave $i
+    }} [interp create]
+} -body {
+    info cmdtype ::testinfocmdtype::slave
+} -cleanup {
+    interp delete $::testinfocmdtype::slave
+} -result slave
+test info-40.11 {info cmdtype: objects} -setup {
+    apply {{} {
+	oo::object create obj
+    } ::testinfocmdtype}
+} -body {
+    info cmdtype ::testinfocmdtype::obj
+} -cleanup {
+    ::testinfocmdtype::obj destroy
+} -result object
+test info-40.12 {info cmdtype: objects} -setup {
+    apply {{} {
+	oo::object create obj
+    } ::testinfocmdtype}
+} -body {
+    info cmdtype [info object namespace ::testinfocmdtype::obj]::my
+} -cleanup {
+    ::testinfocmdtype::obj destroy
+} -result privateObject
+test info-40.13 {info cmdtype: ensembles} -setup {
+    namespace eval ::testinfocmdtype {
+	namespace eval ensmbl {
+	    proc bar {} {}
+	    namespace export *
+	    namespace ensemble create
+	}
+    }
+} -body {
+    info cmdtype ::testinfocmdtype::ensmbl
+} -cleanup {
+    namespace delete ::testinfocmdtype::ensmbl
+} -result ensemble
+test info-40.14 {info cmdtype: zlib streams} -constraints zlib -setup {
+    namespace eval ::testinfocmdtype {
+	rename [zlib stream gzip] zstream
+    }
+} -body {
+    info cmdtype ::testinfocmdtype::zstream
+} -cleanup {
+    ::testinfocmdtype::zstream close
+} -result zlibStream
+test info-40.15 {info cmdtype: coroutines} -setup {
+    coroutine ::testinfocmdtype::coro eval yield
+} -body {
+    info cmdtype ::testinfocmdtype::coro
+} -cleanup {
+    ::testinfocmdtype::coro
+} -result coroutine
+test info-40.16 {info cmdtype: dynamic behavior} -setup {
+    proc ::testinfocmdtype::foo {} {}
+} -body {
+    namespace eval ::testinfocmdtype {
+	list [catch {info cmdtype foo}] [catch {info cmdtype bar}] \
+	    [namespace which foo] [rename foo bar] [namespace which bar] \
+	    [catch {info cmdtype foo}] [catch {info cmdtype bar}]
+    }
+} -cleanup {
+    namespace eval ::testinfocmdtype {
+	catch {rename foo {}}
+	catch {rename bar {}}
+    }
+} -result {0 1 ::testinfocmdtype::foo {} ::testinfocmdtype::bar 1 0}
+test info-40.17 {info cmdtype: aliases in slave interpreters} -setup {
+    set i [interp create]
+} -body {
+    $i alias foo gorp
+    $i eval {
+	info cmdtype foo
+    }
+} -cleanup {
+    interp delete $i
+} -result alias
+test info-40.18 {info cmdtype: aliases in slave interpreters} -setup {
+    set safe [interp create -safe]
+} -body {
+    $safe alias foo gorp
+    $safe eval {
+	info cmdtype foo
+    }
+} -returnCodes error -cleanup {
+    interp delete $safe
+} -result {not allowed to invoke subcommand cmdtype of info}
+test info-40.19 {info cmdtype: aliases in slave interpreters} -setup {
+    set safe [interp create -safe]
+} -body {
+    set inner [interp create [list $safe bar]]
+    interp alias $inner foo $safe gorp
+    $safe eval {
+	bar eval {
+	    info cmdtype foo
+	}
+    }
+} -returnCodes error -cleanup {
+    interp delete $safe
+} -result {not allowed to invoke subcommand cmdtype of info}
+test info-40.20 {info cmdtype: aliases in slave interpreters} -setup {
+    set safe [interp create -safe]
+} -body {
+    $safe eval {
+	interp alias {} foo {} gorp
+	info cmdtype foo
+    }
+} -returnCodes error -cleanup {
+    interp delete $safe
+} -result {not allowed to invoke subcommand cmdtype of info}
+namespace delete ::testinfocmdtype
+
+# -------------------------------------------------------------------------
 unset -nocomplain res
 
 test info-39.2 {Bug 4b61afd660} -setup {
diff --git a/tests/interp.test b/tests/interp.test
index 4ea04e3..29e3b2d 100644
--- a/tests/interp.test
+++ b/tests/interp.test
@@ -20,7 +20,7 @@ catch [list package require -exact Tcltest [info patchlevel]]
 
 testConstraint testinterpdelete [llength [info commands testinterpdelete]]
 
-set hidden_cmds {cd encoding exec exit fconfigure file glob load open pwd socket source tcl:encoding:dirs tcl:file:atime tcl:file:attributes tcl:file:copy tcl:file:delete tcl:file:dirname tcl:file:executable tcl:file:exists tcl:file:extension tcl:file:isdirectory tcl:file:isfile tcl:file:link tcl:file:lstat tcl:file:mkdir tcl:file:mtime tcl:file:nativename tcl:file:normalize tcl:file:owned tcl:file:readable tcl:file:readlink tcl:file:rename tcl:file:rootname tcl:file:size tcl:file:stat tcl:file:tail tcl:file:tempfile tcl:file:type tcl:file:volumes tcl:file:writable unload}
+set hidden_cmds {cd encoding exec exit fconfigure file glob load open pwd socket source tcl:encoding:dirs tcl:encoding:system tcl:file:atime tcl:file:attributes tcl:file:copy tcl:file:delete tcl:file:dirname tcl:file:executable tcl:file:exists tcl:file:extension tcl:file:isdirectory tcl:file:isfile tcl:file:link tcl:file:lstat tcl:file:mkdir tcl:file:mtime tcl:file:nativename tcl:file:normalize tcl:file:owned tcl:file:readable tcl:file:readlink tcl:file:rename tcl:file:rootname tcl:file:size tcl:file:stat tcl:file:tail tcl:file:tempfile tcl:file:type tcl:file:volumes tcl:file:writable tcl:info:cmdtype tcl:info:nameofexecutable tcl:process:autopurge tcl:process:list tcl:process:purge tcl:process:status tcl:zipfs:lmkimg tcl:zipfs:lmkzip tcl:zipfs:mkimg tcl:zipfs:mkkey tcl:zipfs:mkzip tcl:zipfs:mount tcl:zipfs:mount_data tcl:zipfs:unmount unload}
 
 foreach i [interp slaves] {
   interp delete $i
diff --git a/tests/lreplace.test b/tests/lreplace.test
index 4a6b853..fd2f7f8 100644
--- a/tests/lreplace.test
+++ b/tests/lreplace.test
@@ -100,10 +100,10 @@ test lreplace-1.26 {lreplace command} {
 } {a {} {}}
 test lreplace-1.27 {lreplace command} -body {
     lreplace x 1 1
-} -returnCodes 1 -result {list doesn't contain element 1}
+} -result x
 test lreplace-1.28 {lreplace command} -body {
     lreplace x 1 1 y
-} -returnCodes 1 -result {list doesn't contain element 1}
+} -result {x y}
 test lreplace-1.29 {lreplace command} -body {
     lreplace x 1 1 [error foo]
 } -returnCodes 1 -result {foo}
@@ -128,10 +128,10 @@ test lreplace-2.5 {lreplace errors} {
 } {1 {bad index "1x": must be integer?[+-]integer? or end?[+-]integer?}}
 test lreplace-2.6 {lreplace errors} {
     list [catch {lreplace x 3 2} msg] $msg
-} {1 {list doesn't contain element 3}}
+} {0 x}
 test lreplace-2.7 {lreplace errors} {
     list [catch {lreplace x 2 2} msg] $msg
-} {1 {list doesn't contain element 2}}
+} {0 x}
 
 test lreplace-3.1 {lreplace won't modify shared argument objects} {
     proc p {} {
diff --git a/tests/macOSXFCmd.test b/tests/macOSXFCmd.test
index 071f11b..f1758f5 100644
--- a/tests/macOSXFCmd.test
+++ b/tests/macOSXFCmd.test
@@ -99,7 +99,7 @@ test macOSXFCmd-2.6 {MacOSXSetFileAttribute - hidden} {macosxFileAttr notRoot} {
 	    [catch {file attributes foo.test -hidden} msg] $msg \
 	    [file delete -force -- foo.test]
 } {0 {} 0 1 {}}
-test macOSXFCmd-2.7 {MacOSXSetFileAttribute - rsrclength} {macosxFileAttr notRoot} {
+test macOSXFCmd-2.7 {MacOSXSetFileAttribute - rsrclength} {macosxFileAttr notRoot nonPortable} {
     catch {file delete -force -- foo.test}
     close [open foo.test w]
     catch {
@@ -151,16 +151,16 @@ test macOSXFCmd-4.1 {TclMacOSXMatchType} {macosxFileAttr notRoot} {
 	file attributes dir.test -hidden 1
     }
     set res [list \
-	    [catch {glob *.test} msg] $msg \
-	    [catch {glob -types FOOT *.test} msg] $msg \
-	    [catch {glob -types {{macintosh type FOOT}} *.test} msg] $msg \
-	    [catch {glob -types FOOTT *.test} msg] $msg \
-	    [catch {glob -types {{macintosh type FOOTT}} *.test} msg] $msg \
-	    [catch {glob -types {{macintosh type {}}} *.test} msg] $msg \
-	    [catch {glob -types {{macintosh creator FOOC}} *.test} msg] $msg \
-	    [catch {glob -types {{macintosh creator FOOC} {macintosh type FOOT}} *.test} msg] $msg \
-	    [catch {glob -types hidden *.test} msg] $msg \
-	    [catch {glob -types {hidden FOOT} *.test} msg] $msg \
+	    [catch {lsort [glob *.test]} msg] $msg \
+	    [catch {lsort [glob -types FOOT *.test]} msg] $msg \
+	    [catch {lsort [glob -types {{macintosh type FOOT}} *.test]} msg] $msg \
+	    [catch {lsort [glob -types FOOTT *.test]} msg] $msg \
+	    [catch {lsort [glob -types {{macintosh type FOOTT}} *.test]} msg] $msg \
+	    [catch {lsort [glob -types {{macintosh type {}}} *.test]} msg] $msg \
+	    [catch {lsort [glob -types {{macintosh creator FOOC}} *.test]} msg] $msg \
+	    [catch {lsort [glob -types {{macintosh creator FOOC} {macintosh type FOOT}} *.test]} msg] $msg \
+	    [catch {lsort [glob -types hidden *.test]} msg] $msg \
+	    [catch {lsort [glob -types {hidden FOOT} *.test]} msg] $msg \
 	]
     cd ..
     file delete -force globtest
diff --git a/tests/obj.test b/tests/obj.test
index d407669..cd33eaa 100644
--- a/tests/obj.test
+++ b/tests/obj.test
@@ -560,7 +560,7 @@ test obj-33.2 {integer overflow on input} {longIs32bit wideIs64bit} {
 test obj-33.3 {integer overflow on input} {
     set x 0x10000; append x 0000
     list [string is integer $x] [expr { wide($x) }]
-} {0 4294967296}
+} {1 4294967296}
 test obj-33.4 {integer overflow on input} {longIs32bit wideIs64bit} {
     set x -0x8000; append x 0000
     list [string is integer $x] [expr { wide($x) }]
@@ -576,7 +576,7 @@ test obj-33.6 {integer overflow on input} {longIs32bit wideIs64bit} {
 test obj-33.7 {integer overflow on input} {
     set x -0x10000; append x 0000
     list [string is integer $x] [expr { wide($x) }]
-} {0 -4294967296}
+} {1 -4294967296}
 
 test obj-34.1 {mp_iseven} testobj {
     set result ""
diff --git a/tests/oo.test b/tests/oo.test
index a303309..4e50904 100644
--- a/tests/oo.test
+++ b/tests/oo.test
@@ -13,13 +13,11 @@ if {"::tcltest" in [namespace children]} {
     namespace import -force ::tcltest::*
 }
 
-
 # The foundational objects oo::object and oo::class are sensitive to reference
 # counting errors and are deallocated only when an interp is deleted, so in
 # this test suite, interp creation and interp deletion are often used in
 # leaktests in order to leverage this sensitivity.
 
-
 testConstraint memory [llength [info commands memory]]
 if {[testConstraint memory]} {
     proc getbytes {} {
@@ -3838,6 +3836,11 @@ proc SampleSlotSetup script {
 		lappend ops [info level] Set $lst
 		return
 	    }
+	    method Resolve {lst} {
+		variable ops
+		lappend ops [info level] Resolve $lst
+		return $lst
+	    }
 	}
     }
     append script0 \n$script
@@ -3872,7 +3875,7 @@ test oo-32.3 {TIP 380: slots - class test} -setup [SampleSlotSetup {
 	[sampleSlot contents] [sampleSlot ops]
 } -cleanup [SampleSlotCleanup {
     rename sampleSlot {}
-}] -result {0 {} {a b c g h i} {1 Get 1 Set {a b c g h i}}}
+}] -result {0 {} {a b c g h i} {1 Resolve g 1 Resolve h 1 Resolve i 1 Get 1 Set {a b c g h i}}}
 test oo-32.4 {TIP 380: slots - class test} -setup [SampleSlotSetup {
     SampleSlot create sampleSlot
 }] -body {
@@ -3880,7 +3883,7 @@ test oo-32.4 {TIP 380: slots - class test} -setup [SampleSlotSetup {
 	[sampleSlot contents] [sampleSlot ops]
 } -cleanup [SampleSlotCleanup {
     rename sampleSlot {}
-}] -result {0 {} {d e f} {1 Set {d e f}}}
+}] -result {0 {} {d e f} {1 Resolve d 1 Resolve e 1 Resolve f 1 Set {d e f}}}
 test oo-32.5 {TIP 380: slots - class test} -setup [SampleSlotSetup {
     SampleSlot create sampleSlot
 }] -body {
@@ -3888,7 +3891,23 @@ test oo-32.5 {TIP 380: slots - class test} -setup [SampleSlotSetup {
 	[sampleSlot contents] [sampleSlot ops]
 } -cleanup [SampleSlotCleanup {
     rename sampleSlot {}
-}] -result {0 {} {} {d e f g h i} {1 Set {d e f} 1 Get 1 Set {d e f g h i}}}
+}] -result {0 {} {} {d e f g h i} {1 Resolve d 1 Resolve e 1 Resolve f 1 Set {d e f} 1 Resolve g 1 Resolve h 1 Resolve i 1 Get 1 Set {d e f g h i}}}
+test oo-32.6 {TIP 516: slots - class test} -setup [SampleSlotSetup {
+    SampleSlot create sampleSlot
+}] -body {
+    list [info level] [sampleSlot -prepend g h i] \
+	[sampleSlot contents] [sampleSlot ops]
+} -cleanup [SampleSlotCleanup {
+    rename sampleSlot {}
+}] -result {0 {} {g h i a b c} {1 Resolve g 1 Resolve h 1 Resolve i 1 Get 1 Set {g h i a b c}}}
+test oo-32.6 {TIP 516: slots - class test} -setup [SampleSlotSetup {
+    SampleSlot create sampleSlot
+}] -body {
+    list [info level] [sampleSlot -remove c a] \
+	[sampleSlot contents] [sampleSlot ops]
+} -cleanup [SampleSlotCleanup {
+    rename sampleSlot {}
+}] -result {0 {} b {1 Resolve c 1 Resolve a 1 Get 1 Set b}}
 
 test oo-33.1 {TIP 380: slots - defaulting} -setup [SampleSlotSetup {
     set s [SampleSlot new]
@@ -3911,7 +3930,7 @@ test oo-33.3 {TIP 380: slots - defaulting} -setup [SampleSlotSetup {
     list [$s destroy; $s unknown] [$s contents] [$s ops]
 } -cleanup [SampleSlotCleanup {
     rename $s {}
-}] -result {{} unknown {1 Set destroy 1 Set unknown}}
+}] -result {{} unknown {1 Resolve destroy 1 Set destroy 1 Resolve unknown 1 Set unknown}}
 test oo-33.4 {TIP 380: slots - errors} -setup [SampleSlotSetup {
     set s [SampleSlot new]
 }] -body {
@@ -3920,7 +3939,7 @@ test oo-33.4 {TIP 380: slots - errors} -setup [SampleSlotSetup {
 } -returnCodes error -cleanup [SampleSlotCleanup {
     rename $s {}
 }] -result \
-    {unknown method "-grill": must be -append, -clear, -set, contents or ops}
+    {unknown method "-grill": must be -append, -clear, -prepend, -remove, -set, contents or ops}
 
 test oo-34.1 {TIP 380: slots - presence} -setup {
     set obj [oo::object new]
@@ -3950,25 +3969,68 @@ proc getMethods obj {
 }
 test oo-34.3 {TIP 380: slots - presence} {
     getMethods oo::define::filter
-} {{-append -clear -set} {Get Set}}
+} {{-append -clear -prepend -remove -set} {Get Set}}
 test oo-34.4 {TIP 380: slots - presence} {
     getMethods oo::define::mixin
-} {{-append -clear -set} {--default-operation Get Set}}
+} {{-append -clear -prepend -remove -set} {--default-operation Get Resolve Set}}
 test oo-34.5 {TIP 380: slots - presence} {
     getMethods oo::define::superclass
-} {{-append -clear -set} {--default-operation Get Set}}
+} {{-append -clear -prepend -remove -set} {--default-operation Get Resolve Set}}
 test oo-34.6 {TIP 380: slots - presence} {
     getMethods oo::define::variable
-} {{-append -clear -set} {Get Set}}
+} {{-append -clear -prepend -remove -set} {Get Set}}
 test oo-34.7 {TIP 380: slots - presence} {
     getMethods oo::objdefine::filter
-} {{-append -clear -set} {Get Set}}
+} {{-append -clear -prepend -remove -set} {Get Set}}
 test oo-34.8 {TIP 380: slots - presence} {
     getMethods oo::objdefine::mixin
-} {{-append -clear -set} {--default-operation Get Set}}
+} {{-append -clear -prepend -remove -set} {--default-operation Get Resolve Set}}
 test oo-34.9 {TIP 380: slots - presence} {
     getMethods oo::objdefine::variable
-} {{-append -clear -set} {Get Set}}
+} {{-append -clear -prepend -remove -set} {Get Set}}
+test oo-34.10 {TIP 516: slots - resolution} -setup {
+    oo::class create parent
+    set result {}
+    oo::class create 516a { superclass parent }
+    oo::class create 516b { superclass parent }
+    oo::class create 516c { superclass parent }
+    namespace eval 516test {
+	oo::class create 516a { superclass parent }
+	oo::class create 516b { superclass parent }
+	oo::class create 516c { superclass parent }
+    }
+} -body {
+    # Must find the right classes when making the mixin
+    namespace eval 516test {
+	oo::define 516a {
+	    mixin 516b 516c
+	}
+    }
+    lappend result [info class mixin 516test::516a]
+    # Must not remove class with just simple name match
+    oo::define 516test::516a {
+	mixin -remove 516b
+    }
+    lappend result [info class mixin 516test::516a]
+    # Must remove class with resolved name match
+    oo::define 516test::516a {
+	mixin -remove 516test::516c
+    }
+    lappend result [info class mixin 516test::516a]
+    # Must remove class with resolved name match even after renaming, but only
+    # with the renamed name; it is a slot of classes, not strings!
+    rename 516test::516b 516test::516d
+    oo::define 516test::516a {
+	mixin -remove 516test::516b
+    }
+    lappend result [info class mixin 516test::516a]
+    oo::define 516test::516a {
+	mixin -remove 516test::516d
+    }
+    lappend result [info class mixin 516test::516a]
+} -cleanup {
+    parent destroy
+} -result {{::516test::516b ::516test::516c} {::516test::516b ::516test::516c} ::516test::516b ::516test::516d {}}
 
 test oo-35.1 {Bug 9d61624b3d: Empty superclass must not cause crash} -setup {
     oo::class create fruit {
diff --git a/tests/platform.test b/tests/platform.test
index 5880fb9..53d534e 100644
--- a/tests/platform.test
+++ b/tests/platform.test
@@ -10,7 +10,6 @@
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
 package require tcltest 2
-package require tcltests
 
 namespace eval ::tcl::test::platform {
     namespace import ::tcltest::testConstraint
@@ -23,6 +22,7 @@ namespace eval ::tcl::test::platform {
 
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
+package require tcltests
 
 testConstraint testCPUID [llength [info commands testcpuid]]
 testConstraint testlongsize [llength [info commands testlongsize]]
diff --git a/tests/safe.test b/tests/safe.test
index 217507e..356e176 100644
--- a/tests/safe.test
+++ b/tests/safe.test
@@ -92,7 +92,7 @@ test safe-3.2 {calling safe::interpCreate on trusted interp} -setup {
     lsort [a aliases]
 } -cleanup {
     safe::interpDelete a
-} -result {::tcl::file::atime ::tcl::file::attributes ::tcl::file::copy ::tcl::file::delete ::tcl::file::dirname ::tcl::file::executable ::tcl::file::exists ::tcl::file::extension ::tcl::file::isdirectory ::tcl::file::isfile ::tcl::file::link ::tcl::file::lstat ::tcl::file::mkdir ::tcl::file::mtime ::tcl::file::nativename ::tcl::file::normalize ::tcl::file::owned ::tcl::file::readable ::tcl::file::readlink ::tcl::file::rename ::tcl::file::rootname ::tcl::file::size ::tcl::file::stat ::tcl::file::tail ::tcl::file::tempfile ::tcl::file::type ::tcl::file::volumes ::tcl::file::writable ::tcl::info::nameofexecutable clock encoding exit glob load source}
+} -result {::tcl::encoding::system ::tcl::file::dirname ::tcl::file::extension ::tcl::file::rootname ::tcl::file::tail ::tcl::info::nameofexecutable clock encoding exit file glob load source}
 test safe-3.3 {calling safe::interpCreate on trusted interp} -setup {
     catch {safe::interpDelete a}
 } -body {
@@ -464,14 +464,14 @@ test safe-11.1 {testing safe encoding} -setup {
     interp eval $i encoding
 } -returnCodes error -cleanup {
     safe::interpDelete $i
-} -result {wrong # args: should be "encoding option ?arg ...?"}
+} -result {wrong # args: should be "encoding subcommand ?arg ...?"}
 test safe-11.1a {testing safe encoding} -setup {
     set i [safe::interpCreate]
 } -body {
     interp eval $i encoding foobar
 } -returnCodes error -cleanup {
     safe::interpDelete $i
-} -match glob -result {bad option "foobar": must be *}
+} -match glob -result {unknown or ambiguous subcommand "foobar": must be *}
 test safe-11.2 {testing safe encoding} -setup {
     set i [safe::interpCreate]
 } -body {
@@ -526,8 +526,6 @@ test safe-11.7.1 {testing safe encoding} -setup {
     while executing
 "encoding convertfrom"
     invoked from within
-"::interp invokehidden interp* encoding convertfrom"
-    invoked from within
 "encoding convertfrom"
     invoked from within
 "interp eval $i encoding convertfrom"}
@@ -550,8 +548,6 @@ test safe-11.8.1 {testing safe encoding} -setup {
     while executing
 "encoding convertto"
     invoked from within
-"::interp invokehidden interp* encoding convertto"
-    invoked from within
 "encoding convertto"
     invoked from within
 "interp eval $i encoding convertto"}
@@ -765,7 +761,7 @@ test safe-15.1 {safe file ensemble does not surprise code} -setup {
     unset -nocomplain msg
     interp delete $i
 } -result {1 {a b c} 1 {a b c} 1 {invalid command name "file"} 1 0 {a b c} 1 {not allowed to invoke subcommand isdirectory of file}}
-test safe-15.1.1 {safe file ensemble does not surprise code} -setup {
+test safe-15.2 {safe file ensemble does not surprise code} -setup {
     set i [interp create -safe]
 } -body {
     set result [expr {"file" in [interp hidden $i]}]
diff --git a/tests/scan.test b/tests/scan.test
index 5c38fff..b488f68 100644
--- a/tests/scan.test
+++ b/tests/scan.test
@@ -19,11 +19,8 @@ if {"::tcltest" ni [namespace children]} {
 # procedure that returns the range of integers
 
 proc int_range {} {
-    for { set MIN_INT 1 } { int($MIN_INT) > 0 } {} {
-	set MIN_INT [expr { $MIN_INT << 1 }]
-    }
-    set MIN_INT [expr {int($MIN_INT)}]
-    set MAX_INT [expr { ~ $MIN_INT }]
+    set MAX_INT [expr {[format %u -2]/2}]
+    set MIN_INT [expr { ~ $MAX_INT }]
     return [list $MIN_INT $MAX_INT]
 }
 
diff --git a/tests/set-old.test b/tests/set-old.test
index b2e7aa6..ea5155b 100644
--- a/tests/set-old.test
+++ b/tests/set-old.test
@@ -340,7 +340,7 @@ test set-old-8.6 {array command} {
     catch {unset a}
     set a(22) 3
     list [catch {array gorp a} msg] $msg
-} {1 {unknown or ambiguous subcommand "gorp": must be anymore, donesearch, exists, for, get, names, nextelement, set, size, startsearch, statistics, or unset}}
+} {1 {unknown or ambiguous subcommand "gorp": must be anymore, default, donesearch, exists, for, get, names, nextelement, set, size, startsearch, statistics, or unset}}
 test set-old-8.7 {array command, anymore option} {
     catch {unset a}
     list [catch {array anymore a x} msg] $msg
@@ -700,7 +700,7 @@ test set-old-9.1 {ids for array enumeration} {
     catch {unset a}
     set a(a) 1
     list [array star a] [array star a] [array done a s-1-a; array star a] \
-	    [array done a s-2-a; array d a s-3-a; array start a]
+	    [array done a s-2-a; array do a s-3-a; array start a]
 } {s-1-a s-2-a s-3-a s-1-a}
 test set-old-9.2 {array enumeration} {
     catch {unset a}
diff --git a/tests/string.test b/tests/string.test
index f95bc25..0266aad 100644
--- a/tests/string.test
+++ b/tests/string.test
@@ -674,9 +674,9 @@ test string-6.53.$noComp {string is integer, true with whitespace} {
 test string-6.54.$noComp {string is integer, false} {
     list [run {string is integer -fail var 123abc}] $var
 } {0 3}
-test string-6.55.$noComp {string is integer, false on overflow} {
-    list [run {string is integer -fail var +[largest_int]0}] $var
-} {0 -1}
+test string-6.55.$noComp {string is integer, no overflow possible} {
+    run {string is integer +[largest_int]0}
+} 1
 test string-6.56.$noComp {string is integer, false} {
     list [run {string is integer -fail var [expr double(1)]}] $var
 } {0 1}
@@ -807,22 +807,22 @@ test string-6.91.$noComp {string is double, bad doubles} {
     }
     return $result
 } {1 1 0 0 0 1 0 0}
-test string-6.92.$noComp {string is integer, 32-bit overflow} {
+test string-6.92.$noComp {string is integer, no 64-bit overflow} {
     # Bug 718878
-    set x 0x100000000
-    list [run {string is integer -failindex var $x}] $var
-} {0 -1}
-test string-6.93.$noComp {string is integer, 32-bit overflow} {
+    set x 0x10000000000000000
+    run {string is integer $x}
+} 1
+test string-6.93.$noComp {string is integer, no 64-bit overflow} {
     # Bug 718878
-    set x 0x100000000
+    set x 0x10000000000000000
     append x ""
-    list [run {string is integer -failindex var $x}] $var
-} {0 -1}
-test string-6.94.$noComp {string is integer, 32-bit overflow} {
+    run {string is integer $x}
+} 1
+test string-6.94.$noComp {string is integer, no 64-bit overflow} {
     # Bug 718878
-    set x 0x100000000
-    list [run {string is integer -failindex var [expr {$x}]}] $var
-} {0 -1}
+    set x 0x10000000000000000
+    run {string is integer [expr {$x}]}
+} 1
 test string-6.95.$noComp {string is wideinteger, true} {
     run {string is wideinteger +1234567890}
 } 1
diff --git a/tests/tcltest.test b/tests/tcltest.test
index 544027a..1487865 100644
--- a/tests/tcltest.test
+++ b/tests/tcltest.test
@@ -312,7 +312,7 @@ test tcltest-5.5 {InitConstraints: list of built-in constraints} \
 	-result [lsort {
     95 98 asyncPipeClose eformat emptyTest exec hasIsoLocale interactive
     knownBug mac macCrash macOnly macOrPc macOrUnix macOrWin nonBlockFiles
-    nonPortable notRoot nt pc pcCrash pcOnly root singleTestInterp slowTest socket
+    nonPortable notRoot nt pc pcCrash pcOnly root singleTestInterp socket
     stdio tempNotMac tempNotPc tempNotUnix tempNotWin unix unixCrash unixExecs
     unixOnly unixOrPc unixOrWin userInteraction win winCrash winOnly
 }]
diff --git a/tests/thread.test b/tests/thread.test
index eaaaa41..2524911 100644
--- a/tests/thread.test
+++ b/tests/thread.test
@@ -11,14 +11,17 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 
+if {"::tcltest" ni [namespace children]} {
+    package require tcltest 2
+    namespace import -force ::tcltest::*
+}
 
 #  when thread::release is used, -wait is passed in order allow the thread to
 #  be fully finalized, which avoids valgrind "still reachable" reports.
 
-package require tcltests
-
 ::tcltest::loadTestedCommands
 catch [list package require -exact Tcltest [info patchlevel]]
+package require tcltests
 
 # Some tests require the testthread command
 
diff --git a/tests/uplevel.test b/tests/uplevel.test
index 737c571..be2268a 100644
--- a/tests/uplevel.test
+++ b/tests/uplevel.test
@@ -137,27 +137,27 @@ test uplevel-4.15 {level parsing} {
 test uplevel-4.16 {level parsing} {
     apply {{} {uplevel #[expr 1] {}}}
 } {}
-test uplevel-4.17 {level parsing} {
+test uplevel-4.17 {level parsing} -returnCodes error -body {
     apply {{} {uplevel -0xffffffff {}}}
-} {}
-test uplevel-4.18 {level parsing} {
+} -result {bad level "-0xffffffff"}
+test uplevel-4.18 {level parsing} -returnCodes error -body {
     apply {{} {uplevel #-0xffffffff {}}}
-} {}
-test uplevel-4.19 {level parsing} {
+} -result {bad level "#-0xffffffff"}
+test uplevel-4.19 {level parsing} -returnCodes error -body {
     apply {{} {uplevel [expr -0xffffffff] {}}}
-} {}
-test uplevel-4.20 {level parsing} {
+} -result {bad level "-4294967295"}
+test uplevel-4.20 {level parsing} -returnCodes error -body {
     apply {{} {uplevel #[expr -0xffffffff] {}}}
-} {}
+} -result {bad level "#-4294967295"}
 test uplevel-4.21 {level parsing} -body {
     apply {{} {uplevel -1 {}}}
-} -returnCodes error -result {invalid command name "-1"}
+} -returnCodes error -result {bad level "-1"}
 test uplevel-4.22 {level parsing} -body {
     apply {{} {uplevel #-1 {}}}
 } -returnCodes error -result {bad level "#-1"}
 test uplevel-4.23 {level parsing} -body {
     apply {{} {uplevel [expr -1] {}}}
-} -returnCodes error -result {invalid command name "-1"}
+} -returnCodes error -result {bad level "-1"}
 test uplevel-4.24 {level parsing} -body {
     apply {{} {uplevel #[expr -1] {}}}
 } -returnCodes error -result {bad level "#-1"}
@@ -175,13 +175,13 @@ test uplevel-4.28 {level parsing} -body {
 } -returnCodes error -result {bad level "#4294967295"}
 test uplevel-4.29 {level parsing} -body {
     apply {{} {uplevel 0.2 {}}}
-} -returnCodes error -result {bad level "0.2"}
+} -returnCodes error -result {invalid command name "0.2"}
 test uplevel-4.30 {level parsing} -body {
     apply {{} {uplevel #0.2 {}}}
 } -returnCodes error -result {bad level "#0.2"}
 test uplevel-4.31 {level parsing} -body {
     apply {{} {uplevel [expr 0.2] {}}}
-} -returnCodes error -result {bad level "0.2"}
+} -returnCodes error -result {invalid command name "0.2"}
 test uplevel-4.32 {level parsing} -body {
     apply {{} {uplevel #[expr 0.2] {}}}
 } -returnCodes error -result {bad level "#0.2"}
@@ -193,7 +193,7 @@ test uplevel-4.34 {level parsing} -body {
 } -returnCodes error -result {bad level "#.2"}
 test uplevel-4.35 {level parsing} -body {
     apply {{} {uplevel [expr .2] {}}}
-} -returnCodes error -result {bad level "0.2"}
+} -returnCodes error -result {invalid command name "0.2"}
 test uplevel-4.36 {level parsing} -body {
     apply {{} {uplevel #[expr .2] {}}}
 } -returnCodes error -result {bad level "#0.2"}
diff --git a/tests/util.test b/tests/util.test
index 35fc642..34113c0 100644
--- a/tests/util.test
+++ b/tests/util.test
@@ -689,13 +689,13 @@ test util-9.31.1 {TclGetIntForIndex} -body {
 } -returnCodes error -match glob -result *
 test util-9.32 {TclGetIntForIndex} -body {
     string index a 0x1FFFFFFFF+0
-} -returnCodes error -match glob -result *
+} -result {}
 test util-9.33 {TclGetIntForIndex} -body {
     string index a 100000000000+0
-} -returnCodes error -match glob -result *
+} -result {}
 test util-9.33.1 {TclGetIntForIndex} -body {
     string index a 0d100000000000+0
-} -returnCodes error -match glob -result *
+} -result {}
 test util-9.34 {TclGetIntForIndex} -body {
     string index a 1.0
 } -returnCodes error -match glob -result *
@@ -728,7 +728,13 @@ test util-9.43 {TclGetIntForIndex} -body {
 } -returnCodes error -match glob -result *
 test util-9.44 {TclGetIntForIndex} -body {
     string index a 0+1000000000000
-} -returnCodes error -match glob -result *
+} -result {}
+test util-9.45 {TclGetIntForIndex} {
+    string index abcd end+2305843009213693950
+} {}
+test util-9.46 {TclGetIntForIndex} {
+    string index abcd end+4294967294
+} {}
 
 test util-10.1 {Tcl_PrintDouble - rounding} {ieeeFloatingPoint} {
     convertDouble 0x0000000000000000
diff --git a/tests/var.test b/tests/var.test
index 7b7fc25..36beb3a 100644
--- a/tests/var.test
+++ b/tests/var.test
@@ -1046,7 +1046,7 @@ test var-22.2 {leak in parsedVarName} -constraints memory -body {
 } -cleanup {
     unset -nocomplain i x
 } -result 0
-
+
 unset -nocomplain a k v
 test var-23.1 {array command, for loop, too many args} -returnCodes error -body {
     array for {k v} c d e {}
@@ -1202,6 +1202,261 @@ test var-23.14 {array for, shared arguments} -setup {
 } -cleanup {
     unset -nocomplain $vn vn
 } -result {}
+
+test var-24.1 {array default set and get: interpreted} -setup {
+    unset -nocomplain ary
+} -body {
+    array set ary {a 3}
+    array default set ary 7
+    list $ary(a) $ary(b) [info exist ary(a)] [info exist ary(b)] \
+	[array default get ary]
+} -cleanup {
+    unset -nocomplain ary
+} -result {3 7 1 0 7}
+test var-24.2 {array default set and get: compiled} {
+    apply {{} {
+	array set ary {a 3}
+	array default set ary 7
+	list $ary(a) $ary(b) [info exist ary(a)] [info exist ary(b)] \
+	    [array default get ary]
+    }}
+} {3 7 1 0 7}
+test var-24.3 {array default unset: interpreted} -setup {
+    unset -nocomplain ary
+} -body {
+    array set ary {a 3}
+    array default set ary 7
+    list $ary(a) $ary(b) [array default unset ary] $ary(a) [catch {set ary(b)}]
+} -cleanup {
+    unset -nocomplain ary
+} -result {3 7 {} 3 1}
+test var-24.4 {array default unset: compiled} {
+    apply {{} {
+	array set ary {a 3}
+	array default set ary 7
+	list $ary(a) $ary(b) [array default unset ary] $ary(a) \
+	    [catch {set ary(b)}]
+    }}
+} {3 7 {} 3 1}
+test var-24.5 {array default exists: interpreted} -setup {
+    unset -nocomplain ary result
+    set result {}
+} -body {
+    array set ary {a 3}
+    lappend result [info exists ary],[array exists ary],[array default exists ary]
+    array default set ary 7
+    lappend result [info exists ary],[array exists ary],[array default exists ary]
+    array default unset ary
+    lappend result [info exists ary],[array exists ary],[array default exists ary]
+    unset ary
+    lappend result [info exists ary],[array exists ary],[array default exists ary]
+    array default set ary 11
+    lappend result [info exists ary],[array exists ary],[array default exists ary]
+} -cleanup {
+    unset -nocomplain ary result
+} -result {1,1,0 1,1,1 1,1,0 0,0,0 1,1,1}
+test var-24.6 {array default exists: compiled} {
+    apply {{} {
+	array set ary {a 3}
+	lappend result [info exists ary],[array exists ary],[array default exists ary]
+	array default set ary 7
+	lappend result [info exists ary],[array exists ary],[array default exists ary]
+	array default unset ary
+	lappend result [info exists ary],[array exists ary],[array default exists ary]
+	unset ary
+	lappend result [info exists ary],[array exists ary],[array default exists ary]
+	array default set ary 11
+	lappend result [info exists ary],[array exists ary],[array default exists ary]
+    }}
+} {1,1,0 1,1,1 1,1,0 0,0,0 1,1,1}
+test var-24.7 {array default and append: interpreted} -setup {
+    unset -nocomplain ary result
+    set result {}
+} -body {
+    array default set ary grill
+    lappend result [array size ary] [info exist ary(x)]
+    append ary(x) abc
+    lappend result [array size ary] $ary(x)
+    array default unset ary
+    append ary(x) def
+    append ary(y) ghi
+    lappend result [array size ary] $ary(x) $ary(y)
+} -cleanup {
+    unset -nocomplain ary result
+} -result {0 0 1 grillabc 2 grillabcdef ghi}
+test var-24.8 {array default and append: compiled} {
+    apply {{} {
+	array default set ary grill
+	lappend result [array size ary] [info exist ary(x)]
+	append ary(x) abc
+	lappend result [array size ary] $ary(x)
+	array default unset ary
+	append ary(x) def
+	append ary(y) ghi
+	lappend result [array size ary] $ary(x) $ary(y)
+    }}
+} {0 0 1 grillabc 2 grillabcdef ghi}
+test var-24.9 {array default and lappend: interpreted} -setup {
+    unset -nocomplain ary result
+    set result {}
+} -body {
+    array default set ary grill
+    lappend result [array size ary] [info exist ary(x)]
+    lappend ary(x) abc
+    lappend result [array size ary] $ary(x)
+    array default unset ary
+    lappend ary(x) def
+    lappend ary(y) ghi
+    lappend result [array size ary] $ary(x) $ary(y)
+} -cleanup {
+    unset -nocomplain ary result
+} -result {0 0 1 {grill abc} 2 {grill abc def} ghi}
+test var-24.10 {array default and lappend: compiled} {
+    apply {{} {
+	array default set ary grill
+	lappend result [array size ary] [info exist ary(x)]
+	lappend ary(x) abc
+	lappend result [array size ary] $ary(x)
+	array default unset ary
+	lappend ary(x) def
+	lappend ary(y) ghi
+	lappend result [array size ary] $ary(x) $ary(y)
+    }}
+} {0 0 1 {grill abc} 2 {grill abc def} ghi}
+test var-24.11 {array default and incr: interpreted} -setup {
+    unset -nocomplain ary result
+    set result {}
+} -body {
+    array default set ary 7
+    lappend result [array size ary] [info exist ary(x)]
+    incr ary(x) 11
+    lappend result [array size ary] $ary(x)
+    array default unset ary
+    incr ary(x)
+    incr ary(y)
+    lappend result [array size ary] $ary(x) $ary(y)
+} -cleanup {
+    unset -nocomplain ary result
+} -result {0 0 1 18 2 19 1}
+test var-24.12 {array default and incr: compiled} {
+    apply {{} {
+	array default set ary 7
+	lappend result [array size ary] [info exist ary(x)]
+	incr ary(x) 11
+	lappend result [array size ary] $ary(x)
+	array default unset ary
+	incr ary(x)
+	incr ary(y)
+	lappend result [array size ary] $ary(x) $ary(y)
+    }}
+} {0 0 1 18 2 19 1}
+test var-24.13 {array default and dict: interpreted} -setup {
+    unset -nocomplain ary x y z
+} -body {
+    array default set ary {x y}
+    dict lappend ary(p) x z
+    dict update ary(q) x y {
+	set y z
+    }
+    dict with ary(r) {
+	set x 123
+    }
+    lsort -stride 2 -index 0 [array get ary]
+} -cleanup {
+    unset -nocomplain ary x y z
+} -result {p {x {y z}} q {x z} r {x 123}}
+test var-24.14 {array default and dict: compiled} {
+    lsort -stride 2 -index 0 [apply {{} {
+	array default set ary {x y}
+	dict lappend ary(p) x z
+	dict update ary(q) x y {
+	    set y z
+	}
+	dict with ary(r) {
+	    set x 123
+	}
+	array get ary
+    }}]
+} {p {x {y z}} q {x z} r {x 123}}
+test var-24.15 {array default set and get: two-level} {
+    apply {{} {
+	array set ary {a 3}
+	array default set ary 7
+	apply {{} {
+	    upvar 1 ary ary ary(c) c
+	    lappend result $ary(a) $ary(b) $c
+	    lappend result [info exist ary(a)] [info exist ary(b)] [info exist c]
+	    lappend result [array default get ary]
+	}}
+    }}
+} {3 7 7 1 0 0 7}
+test var-24.16 {array default set: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    set ary not-an-array
+    array default set ary 7
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result {can't array default set "ary": variable isn't array}
+test var-24.17 {array default set: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    array default set ary
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result * -match glob
+test var-24.18 {array default set: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    array default set ary x y
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result * -match glob
+test var-24.19 {array default get: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    set ary not-an-array
+    array default get ary
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result {"ary" isn't an array}
+test var-24.20 {array default get: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    array default get ary x y
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result * -match glob
+test var-24.21 {array default exists: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    set ary not-an-array
+    array default exists ary
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result {"ary" isn't an array}
+test var-24.22 {array default exists: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    array default exists ary x
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result * -match glob
+test var-24.23 {array default unset: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    set ary not-an-array
+    array default unset ary
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result {"ary" isn't an array}
+test var-24.24 {array default unset: errors} -setup {
+    unset -nocomplain ary
+} -body {
+    array default unset ary x
+} -returnCodes error -cleanup {
+    unset -nocomplain ary
+} -result * -match glob
 
 catch {namespace delete ns}
 catch {unset arr}
diff --git a/tests/winPipe.test b/tests/winPipe.test
index e246ad5..361858a 100644
--- a/tests/winPipe.test
+++ b/tests/winPipe.test
@@ -30,6 +30,7 @@ testConstraint cat32        [file exists $cat32]
 testConstraint AllocConsole [catch {puts console1 ""}]
 testConstraint RealConsole  [expr {![testConstraint AllocConsole]}]
 testConstraint testexcept   [llength [info commands testexcept]]
+testConstraint slowTest     0
 
 
 set big bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n
@@ -323,16 +324,16 @@ proc _testExecArgs {single args} {
 	lappend cmds [list $path(echoArgs.bat)]
     } else {
 	if {![info exists path(echoArgs2.bat)] || ![file exists $path(echoArgs2.bat)]} {
-	    file mkdir [file join [temporaryDirectory] test(Dir)Check]
-	    set path(echoArgs2.bat) [makeFile "@[file native [interpreter]] $path(echoArgs.tcl) %*" \
-		"test(Dir)Check/echo(Cmd)Test Args & Batch.bat"]
+	    set path(echoArgs2.bat) [makeFile \
+		"@[file native [interpreter]] $path(echoArgs.tcl) %*" \
+		"echo(Cmd)Test Args & Batch.bat" [makeDirectory test(Dir)Check]]
 	}
 	lappend cmds [list $path(echoArgs2.bat)]
     }
     set broken {}
     foreach args $args {
 	if {$single & 1} {
-	    # enclose single test-arg between 1st/3rd to be sure nothing is truncated 
+	    # enclose single test-arg between 1st/3rd to be sure nothing is truncated
 	    # (e. g. to cover unexpected trim by nts-zero case, and args don't recombined):
 	    set args [list "1st" $args "3rd"]
 	}
@@ -569,7 +570,7 @@ set injectList {
 
 test winpipe-8.6 {BuildCommandLine/parse_cmdline pass-thru: check new-line quoted in args} \
 -constraints {win exec} -body {
-    # test exe only, because currently there is no proper way to escape a new-line char resp. 
+    # test exe only, because currently there is no proper way to escape a new-line char resp.
     # to supply a new-line to the batch-files within arguments (command line is truncated).
     _testExecArgs 8 \
 	[list START     {*}$injectList END] \
@@ -603,9 +604,9 @@ removeFile more
 removeFile stdout
 removeFile stderr
 removeFile nothing
-removeFile echoArgs.tcl
-removeFile echoArgs.bat
-file delete -force [file join [temporaryDirectory] test(Dir)Check]
+if {[info exists path(echoArgs.tcl)]} { removeFile echoArgs.tcl }
+if {[info exists path(echoArgs.bat)]} { removeFile echoArgs.bat }
+if {[info exists path(echoArgs2.bat)]} { removeDirectory test(Dir)Check }
 ::tcltest::cleanupTests
 return
 
diff --git a/tests/zipfs.test b/tests/zipfs.test
new file mode 100644
index 0000000..5715ce8
--- /dev/null
+++ b/tests/zipfs.test
@@ -0,0 +1,284 @@
+# The file tests the tclZlib.c file.
+#
+# This file contains a collection of tests for one or more of the Tcl built-in
+# commands. Sourcing this file into Tcl runs the tests and generates output
+# for errors. No output means no errors were found.
+#
+# Copyright (c) 1996-1998 by Sun Microsystems, Inc.
+# Copyright (c) 1998-1999 by Scriptics Corporation.
+#
+# See the file "license.terms" for information on usage and redistribution of
+# this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+if {"::tcltest" ni [namespace children]} {
+    package require tcltest 2.1
+    namespace import -force ::tcltest::*
+}
+
+testConstraint zipfs [expr {
+    [llength [info commands zlib]] && [regexp tcltest [info nameofexecutable]]
+}]
+testConstraint zipfslib 1
+
+# Removed in tip430 - zipfs is no longer a static package
+#test zipfs-0.0 {zipfs basics} -constraints zipfs -body {
+#    load {} zipfs
+#} -result {}
+
+set ziproot [zipfs root]
+set CWD [pwd]
+set tmpdir  [file join $CWD tmp]
+file mkdir $tmpdir
+
+test zipfs-0.0 {zipfs basics} -constraints zipfs -body {
+    package require zipfs
+} -result {2.0}
+test zipfs-0.1 {zipfs basics} -constraints zipfs -body {
+    expr {${ziproot} in [file volumes]}
+} -result 1
+
+if {![string match ${ziproot}* $tcl_library]} {
+    ###
+    # "make test" does not map tcl_library from the dynamic library on Unix
+    #
+    # Hack the environment to pretend we did pull tcl_library from a zip
+    # archive
+    ###
+    set tclzip [file join $CWD [::tcl::pkgconfig get zipfile,runtime]]
+    testConstraint zipfslib [file exists $tclzip]
+    if {[testConstraint zipfslib]} {
+        zipfs mount /lib/tcl $tclzip
+        set ::tcl_library ${ziproot}lib/tcl/tcl_library
+    }
+}
+
+test zipfs-0.2 {zipfs basics} -constraints zipfslib -body {
+    string match ${ziproot}* $tcl_library
+} -result 1
+test zipfs-0.3 {zipfs basics: glob} -constraints zipfslib -setup {
+    set pwd [pwd]
+} -body {
+    cd $tcl_library
+    lsort [glob -dir . http*]
+} -cleanup {
+    cd $pwd
+} -result {./http}
+test zipfs-0.4 {zipfs basics: glob} -constraints zipfslib -setup {
+    set pwd [pwd]
+} -body {
+    cd $tcl_library
+    lsort [glob -dir [pwd] http*]
+} -cleanup {
+    cd $pwd
+} -result [list $tcl_library/http]
+test zipfs-0.5 {zipfs basics: glob} -constraints zipfslib -body {
+    lsort [glob -dir $tcl_library http*]
+} -result [list $tcl_library/http]
+test zipfs-0.6 {zipfs basics: glob} -constraints zipfslib -body {
+    lsort [glob $tcl_library/http*]
+} -result [list $tcl_library/http]
+test zipfs-0.7 {zipfs basics: glob} -constraints zipfslib -body {
+    lsort [glob -tails -dir $tcl_library http*]
+} -result {http}
+test zipfs-0.8 {zipfs basics: glob} -constraints zipfslib -body {
+    lsort [glob -nocomplain -tails -types d -dir $tcl_library http*]
+} -result {http}
+test zipfs-0.9 {zipfs basics: glob} -constraints zipfslib -body {
+    lsort [glob -nocomplain -tails -types f -dir $tcl_library http*]
+} -result {}
+test zipfs-0.10 {zipfs basics: join} -constraints {zipfs zipfslib} -body {
+    file join [zipfs root] bar baz
+} -result "[zipfs root]bar/baz"
+test zipfs-0.11 {zipfs basics: join} -constraints {zipfs zipfslib} -body {
+    file normalize [zipfs root]
+} -result "[zipfs root]"
+test zipfs-0.12 {zipfs basics: join} -constraints {zipfs zipfslib} -body {
+    file normalize [zipfs root]//bar/baz//qux/../
+} -result "[zipfs root]bar/baz"
+
+test zipfs-1.3 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs mount a b c d e f
+} -result {wrong # args: should be "zipfs mount ?mountpoint? ?zipfile? ?password?"}
+test zipfs-1.4 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs unmount a b c d e f
+} -result {wrong # args: should be "zipfs unmount zipfile"}
+test zipfs-1.5 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs mkkey a b c d e f
+} -result {wrong # args: should be "zipfs mkkey password"}
+test zipfs-1.6 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs mkimg a b c d e f
+} -result {wrong # args: should be "zipfs mkimg outfile indir ?strip? ?password? ?infile?"}
+test zipfs-1.7 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs mkzip a b c d e f
+} -result {wrong # args: should be "zipfs mkzip outfile indir ?strip? ?password?"}
+test zipfs-1.8 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs exists a b c d e f
+} -result {wrong # args: should be "zipfs exists filename"}
+test zipfs-1.9 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs info a b c d e f
+} -result {wrong # args: should be "zipfs info filename"}
+test zipfs-1.10 {zipfs errors} -constraints zipfs -returnCodes error -body {
+    zipfs list a b c d e f
+} -result {wrong # args: should be "zipfs list ?(-glob|-regexp)? ?pattern?"}
+
+file mkdir tmp
+test zipfs-2.1 {zipfs mkzip empty archive} -constraints zipfs -returnCodes error -body {
+    zipfs mkzip [file join $tmpdir empty.zip] $tcl_library/xxxx
+} -result {empty archive}
+###
+# The next series of tests operate within a zipfile created a temporary
+# directory.
+###
+set zipfile [file join $tmpdir abc.zip]
+if {[file exists $zipfile]} {
+   file delete $zipfile
+}
+test zipfs-2.2 {zipfs mkzip} -constraints zipfs -body {
+    cd $tcl_library/encoding
+    zipfs mkzip $zipfile .
+    zipfs mount ${ziproot}abc $zipfile
+    zipfs list -glob ${ziproot}abc/cp850.*
+} -cleanup {
+    cd $CWD
+} -result "[zipfs root]abc/cp850.enc"
+testConstraint zipfsenc [zipfs exists /abc/cp850.enc]
+test zipfs-2.3 {zipfs info} -constraints {zipfs zipfsenc} -body {
+    set r [zipfs info ${ziproot}abc/cp850.enc]
+    lrange $r 0 2
+} -result [list $zipfile 1090 527] ;# NOTE: Only the first 3 results are stable
+test zipfs-2.4 {zipfs data} -constraints {zipfs zipfsenc} -body {
+    set zipfd [open ${ziproot}/abc/cp850.enc]	;# FIXME: leave open - see later test
+    read $zipfd
+} -result {# Encoding file: cp850, single-byte
+S
+003F 0 1
+00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} ;# FIXME: result depends on content of encodings dir
+test zipfs-2.5 {zipfs exists} -constraints {zipfs zipfsenc} -body {
+    zipfs exists /abc/cp850.enc
+} -result 1
+test zipfs-2.6 {zipfs unmount while busy} -constraints {zipfs zipfsenc} -body {
+    zipfs unmount /abc
+} -returnCodes error -result {filesystem is busy}
+test zipfs-2.7 {zipfs unmount} -constraints {zipfs zipfsenc} -body {
+    close $zipfd
+    zipfs unmount /abc
+    zipfs exists /abc/cp850.enc
+} -result 0
+###
+# Repeat the tests for a buffer mounted archive
+###
+test zipfs-2.8 {zipfs mkzip} -constraints zipfs -body {
+    cd $tcl_library/encoding
+    zipfs mkzip $zipfile .
+    set fin [open $zipfile r]
+    fconfigure $fin -translation binary
+    set dat [read $fin]
+    close $fin
+    zipfs mount_data def $dat
+    zipfs list -glob ${ziproot}def/cp850.*
+} -cleanup {
+    cd $CWD
+} -result "[zipfs root]def/cp850.enc"
+testConstraint zipfsencbuf [zipfs exists /def/cp850.enc]
+test zipfs-2.9 {zipfs info} -constraints {zipfs zipfsencbuf} -body {
+    set r [zipfs info ${ziproot}def/cp850.enc]
+    lrange $r 0 2
+} -result [list {Memory Buffer} 1090 527] ;# NOTE: Only the first 3 results are stable
+test zipfs-2.10 {zipfs data} -constraints {zipfs zipfsencbuf} -body {
+    set zipfd [open ${ziproot}/def/cp850.enc]	;# FIXME: leave open - see later test
+    read $zipfd
+} -result {# Encoding file: cp850, single-byte
+S
+003F 0 1
+00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} ;# FIXME: result depends on content of encodings dir
+test zipfs-2.11 {zipfs exists} -constraints {zipfs zipfsencbuf} -body {
+    zipfs exists /def/cp850.enc
+} -result 1
+test zipfs-2.12 {zipfs unmount while busy} -constraints {zipfs zipfsencbuf} -body {
+    zipfs unmount /def
+} -returnCodes error -result {filesystem is busy}
+test zipfs-2.13 {zipfs unmount} -constraints {zipfs zipfsencbuf} -body {
+    close $zipfd
+    zipfs unmount /def
+    zipfs exists /def/cp850.enc
+} -result 0
+
+catch {file delete -force $tmpdir}
+
+test zipfs-3.1 {zipfs in child interpreters} -constraints zipfs -setup {
+    set interp [interp create]
+} -body {
+    interp eval $interp {
+	zipfs ?
+    }
+} -returnCodes error -cleanup {
+    interp delete $interp
+} -result {unknown or ambiguous subcommand "?": must be canonical, exists, find, info, list, lmkimg, lmkzip, mkimg, mkkey, mkzip, mount, mount_data, root, or unmount}
+test zipfs-3.2 {zipfs in child interpreters} -constraints zipfs -setup {
+    set interp [interp create]
+} -body {
+    interp eval $interp {
+	zipfs mkzip
+    }
+} -returnCodes error -cleanup {
+    interp delete $interp
+} -result {wrong # args: should be "zipfs mkzip outfile indir ?strip? ?password?"}
+test zipfs-3.3 {zipfs in child interpreters} -constraints zipfs -setup {
+    set safe [interp create -safe]
+} -body {
+    interp eval $safe {
+	zipfs ?
+    }
+} -returnCodes error -cleanup {
+    interp delete $safe
+} -result {unknown or ambiguous subcommand "?": must be canonical, exists, find, info, list, lmkimg, lmkzip, mkimg, mkkey, mkzip, mount, mount_data, root, or unmount}
+test zipfs-3.4 {zipfs in child interpreters} -constraints zipfs -setup {
+    set safe [interp create -safe]
+} -body {
+    interp eval $safe {
+	zipfs mkzip
+    }
+} -returnCodes error -cleanup {
+    interp delete $safe
+} -result {not allowed to invoke subcommand mkzip of zipfs}
+
+::tcltest::cleanupTests
+return
+
+# Local Variables:
+# mode: tcl
+# End:
diff --git a/tools/mkVfs.tcl b/tools/mkVfs.tcl
new file mode 100644
index 0000000..cbfb81e
--- /dev/null
+++ b/tools/mkVfs.tcl
@@ -0,0 +1,99 @@
+proc cat fname {
+    set fname [open $fname r]
+    set data [read $fname]
+    close $fname
+    return $data
+}
+
+proc pkgIndexDir {root fout d1} {
+
+    puts [format {%*sIndexing %s} [expr {4 * [info level]}] {} \
+	      [file tail $d1]]
+    set idx [string length $root]
+    foreach ftail [glob -directory $d1 -nocomplain -tails *] {
+        set f [file join $d1 $ftail]
+        if {[file isdirectory $f] && [string compare CVS $ftail]} {
+            pkgIndexDir $root $fout $f
+        } elseif {[file tail $f] eq "pkgIndex.tcl"} {
+      	    puts $fout "set dir \${VFSROOT}[string range $d1 $idx end]"
+	          puts $fout [cat $f]
+	      }
+    }
+}
+
+###
+# Script to build the VFS file system
+###
+proc copyDir {d1 d2} {
+
+    puts [format {%*sCreating %s} [expr {4 * [info level]}] {} \
+	      [file tail $d2]]
+
+    file delete -force -- $d2
+    file mkdir $d2
+
+    foreach ftail [glob -directory $d1 -nocomplain -tails *] {
+        set f [file join $d1 $ftail]
+        if {[file isdirectory $f] && [string compare CVS $ftail]} {
+            copyDir $f [file join $d2 $ftail]
+        } elseif {[file isfile $f]} {
+      	    file copy -force $f [file join $d2 $ftail]
+	          if {$::tcl_platform(platform) eq {unix}} {
+            		file attributes [file join $d2 $ftail] -permissions 0644
+      	    } else {
+            		file attributes [file join $d2 $ftail] -readonly 1
+	          }
+	      }
+    }
+
+    if {$::tcl_platform(platform) eq {unix}} {
+      	file attributes $d2 -permissions 0755
+    } else {
+	      file attributes $d2 -readonly 1
+    }
+}
+
+if {[llength $argv] < 3} {
+    puts "Usage: VFS_ROOT TCLSRC_ROOT PLATFORM"
+    exit 1
+}
+set TCL_SCRIPT_DIR [lindex $argv 0]
+set TCLSRC_ROOT    [lindex $argv 1]
+set PLATFORM       [lindex $argv 2]
+set TKDLL          [lindex $argv 3]
+set TKVER          [lindex $argv 4]
+
+puts "Building [file tail $TCL_SCRIPT_DIR] for $PLATFORM"
+copyDir ${TCLSRC_ROOT}/library ${TCL_SCRIPT_DIR}
+
+if {$PLATFORM == "windows"} {
+    set ddedll [glob -nocomplain ${TCLSRC_ROOT}/win/tcldde*.dll]
+    puts "DDE DLL $ddedll"
+    if {$ddedll != {}} {
+      	file copy $ddedll ${TCL_SCRIPT_DIR}/dde
+    }
+    set regdll [glob -nocomplain ${TCLSRC_ROOT}/win/tclreg*.dll]
+    puts "REG DLL $ddedll"
+    if {$regdll != {}} {
+      	file copy $regdll ${TCL_SCRIPT_DIR}/reg
+    }
+} else {
+    # Remove the dde and reg package paths
+    file delete -force ${TCL_SCRIPT_DIR}/dde
+    file delete -force ${TCL_SCRIPT_DIR}/reg
+}
+
+# For the following packages, cat their pkgIndex files to tclIndex
+file attributes ${TCL_SCRIPT_DIR}/tclIndex -readonly 0
+set fout [open ${TCL_SCRIPT_DIR}/tclIndex a]
+puts $fout {#
+# MANIFEST OF INCLUDED PACKAGES
+#
+set VFSROOT $dir
+}
+if {$TKDLL ne {} && [file exists $TKDLL]} {
+  file copy $TKDLL ${TCL_SCRIPT_DIR}
+  puts $fout [list package ifneeded Tk $TKVER "load \$dir $TKDLL"]
+}
+pkgIndexDir ${TCL_SCRIPT_DIR} $fout ${TCL_SCRIPT_DIR}
+close $fout
diff --git a/unix/Makefile.in b/unix/Makefile.in
index eab5c1a..487ae61 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -83,7 +83,7 @@ HTML_INSTALL_DIR	= $(INSTALL_ROOT)$(HTML_DIR)
 CONFIG_INSTALL_DIR	= $(INSTALL_ROOT)$(libdir)
 
 # Directory in which to install bundled packages:
-PACKAGE_DIR             = @PACKAGE_DIR@
+PACKAGE_DIR		= @PACKAGE_DIR@
 
 # Package search path.
 TCL_PACKAGE_PATH	= @TCL_PACKAGE_PATH@
@@ -151,8 +151,8 @@ SHELL			= @MAKEFILE_SHELL@
 # around; better to use the install-sh script that comes with the
 # distribution, which is slower but guaranteed to work.
 
-INSTALL_STRIP_PROGRAM   = -s
-INSTALL_STRIP_LIBRARY   = -S -x
+INSTALL_STRIP_PROGRAM	= -s
+INSTALL_STRIP_LIBRARY	= -S -x
 
 INSTALL			= $(SHELL) $(UNIX_DIR)/install-sh -c
 INSTALL_PROGRAM		= ${INSTALL}
@@ -242,11 +242,13 @@ ZLIB_DIR		= ${COMPAT_DIR}/zlib
 ZLIB_INCLUDE		= @ZLIB_INCLUDE@
 
 CC			= @CC@
+OBJEXT			= @OBJEXT@
+
 #CC			= purify -best-effort @CC@ -DPURIFY
 
 # Flags to be passed to installManPage to control how the manpages should be
 # installed (symlinks, compression, package name suffix).
-MAN_FLAGS               = @MAN_FLAGS@
+MAN_FLAGS		= @MAN_FLAGS@
 
 # If non-empty, install the timezone files that are included with Tcl,
 # otherwise use the ones that ship with the OS.
@@ -264,8 +266,8 @@ TRACE			= strace
 TRACE_OPTS		=
 VALGRIND		= valgrind
 VALGRINDARGS		= --tool=memcheck --num-callers=24 \
-    --leak-resolution=high --leak-check=yes --show-reachable=yes -v \
-    --suppressions=$(TOOL_DIR)/valgrind_suppress
+	--leak-resolution=high --leak-check=yes --show-reachable=yes -v \
+	--suppressions=$(TOOL_DIR)/valgrind_suppress
 
 #--------------------------------------------------------------------------
 # The information below should be usable as is. The configure script won't
@@ -273,8 +275,9 @@ VALGRINDARGS		= --tool=memcheck --num-callers=24 \
 #--------------------------------------------------------------------------
 
 STUB_CC_SWITCHES = ${CFLAGS} ${CFLAGS_WARNING} ${SHLIB_CFLAGS} \
--I"${BUILD_DIR}" -I${UNIX_DIR} -I${GENERIC_DIR} -I${TOMMATH_DIR} \
-${AC_FLAGS} ${PROTO_FLAGS} ${ENV_FLAGS} ${EXTRA_CFLAGS} @EXTRA_CC_SWITCHES@
+	-I"${BUILD_DIR}" -I${UNIX_DIR} -I${GENERIC_DIR} -I${TOMMATH_DIR} \
+	${AC_FLAGS} ${PROTO_FLAGS} ${ENV_FLAGS} ${EXTRA_CFLAGS} \
+	@EXTRA_CC_SWITCHES@
 
 CC_SWITCHES = $(STUB_CC_SWITCHES) ${NO_DEPRECATED_FLAGS}
 
@@ -283,7 +286,7 @@ APP_CC_SWITCHES = $(CC_SWITCHES) @EXTRA_APP_CC_SWITCHES@
 LIBS		= @TCL_LIBS@
 
 DEPEND_SWITCHES	= ${CFLAGS} -I${UNIX_DIR} -I${GENERIC_DIR} \
-${AC_FLAGS} ${PROTO_FLAGS} ${EXTRA_CFLAGS} @EXTRA_CC_SWITCHES@
+	${AC_FLAGS} ${PROTO_FLAGS} ${EXTRA_CFLAGS} @EXTRA_CC_SWITCHES@
 
 TCLSH_OBJS = tclAppInit.o
 
@@ -311,32 +314,33 @@ GENERIC_OBJS = regcomp.o regexec.o regfree.o regerror.o tclAlloc.o \
 	tclStrToD.o tclThread.o \
 	tclThreadAlloc.o tclThreadJoin.o tclThreadStorage.o tclStubInit.o \
 	tclTimer.o tclTrace.o tclUtf.o tclUtil.o tclVar.o tclZlib.o \
-	tclTomMathInterface.o
+	tclTomMathInterface.o tclZipfs.o
 
 OO_OBJS = tclOO.o tclOOBasic.o tclOOCall.o tclOODefineCmds.o tclOOInfo.o \
 	tclOOMethod.o tclOOStubInit.o
 
 TOMMATH_OBJS = bncore.o bn_reverse.o bn_fast_s_mp_mul_digs.o \
 	bn_fast_s_mp_sqr.o bn_mp_add.o bn_mp_and.o \
-        bn_mp_add_d.o bn_mp_clamp.o bn_mp_clear.o bn_mp_clear_multi.o \
-        bn_mp_cmp.o bn_mp_cmp_d.o bn_mp_cmp_mag.o \
+	bn_mp_add_d.o bn_mp_clamp.o bn_mp_clear.o bn_mp_clear_multi.o \
+	bn_mp_cmp.o bn_mp_cmp_d.o bn_mp_cmp_mag.o \
 	bn_mp_cnt_lsb.o bn_mp_copy.o \
 	bn_mp_count_bits.o bn_mp_div.o bn_mp_div_d.o bn_mp_div_2.o \
 	bn_mp_div_2d.o bn_mp_div_3.o \
-        bn_mp_exch.o bn_mp_expt_d.o bn_mp_expt_d_ex.o bn_mp_get_int.o bn_mp_get_long.o bn_mp_get_long_long.o bn_mp_grow.o bn_mp_init.o \
+	bn_mp_exch.o bn_mp_expt_d.o bn_mp_expt_d_ex.o bn_mp_get_int.o \
+	bn_mp_get_long.o bn_mp_get_long_long.o bn_mp_grow.o bn_mp_init.o \
 	bn_mp_init_copy.o bn_mp_init_multi.o bn_mp_init_set.o \
 	bn_mp_init_set_int.o bn_mp_init_size.o bn_mp_karatsuba_mul.o \
 	bn_mp_karatsuba_sqr.o \
-        bn_mp_lshd.o bn_mp_mod.o bn_mp_mod_2d.o bn_mp_mul.o bn_mp_mul_2.o \
-        bn_mp_mul_2d.o bn_mp_mul_d.o bn_mp_neg.o bn_mp_or.o \
+	bn_mp_lshd.o bn_mp_mod.o bn_mp_mod_2d.o bn_mp_mul.o bn_mp_mul_2.o \
+	bn_mp_mul_2d.o bn_mp_mul_d.o bn_mp_neg.o bn_mp_or.o \
 	bn_mp_radix_size.o bn_mp_radix_smap.o \
-        bn_mp_read_radix.o bn_mp_rshd.o bn_mp_set.o bn_mp_set_int.o \
+	bn_mp_read_radix.o bn_mp_rshd.o bn_mp_set.o bn_mp_set_int.o \
 	bn_mp_set_long.o bn_mp_set_long_long.o bn_mp_shrink.o \
 	bn_mp_sqr.o bn_mp_sqrt.o bn_mp_sub.o bn_mp_sub_d.o \
-        bn_mp_to_unsigned_bin.o bn_mp_to_unsigned_bin_n.o \
+	bn_mp_to_unsigned_bin.o bn_mp_to_unsigned_bin_n.o \
 	bn_mp_toom_mul.o bn_mp_toom_sqr.o bn_mp_toradix_n.o \
 	bn_mp_unsigned_bin_size.o bn_mp_xor.o bn_mp_zero.o bn_s_mp_add.o \
-        bn_s_mp_mul_digs.o bn_s_mp_sqr.o bn_s_mp_sub.o
+	bn_s_mp_mul_digs.o bn_s_mp_sqr.o bn_s_mp_sub.o
 
 STUB_LIB_OBJS = tclStubLib.o \
 	tclTomMathStubLib.o \
@@ -467,7 +471,8 @@ GENERIC_SRCS = \
 	$(GENERIC_DIR)/tclUtil.c \
 	$(GENERIC_DIR)/tclVar.c \
 	$(GENERIC_DIR)/tclAssembly.c \
-	$(GENERIC_DIR)/tclZlib.c
+	$(GENERIC_DIR)/tclZlib.c \
+	$(GENERIC_DIR)/tclZipfs.c
 
 OO_SRCS = \
 	$(GENERIC_DIR)/tclOO.c \
@@ -620,6 +625,44 @@ ZLIB_SRCS = \
 SRCS = $(GENERIC_SRCS) $(TOMMATH_SRCS) $(UNIX_SRCS) $(NOTIFY_SRCS) \
 	$(OO_SRCS) $(STUB_SRCS) @PLAT_SRCS@ @ZLIB_SRCS@
 
+###
+# Tip 430 - ZipFS Modifications
+###
+
+TCL_ZIP_FILE		= @TCL_ZIP_FILE@
+TCL_VFS_ROOT		= libtcl.vfs
+TCL_VFS_PATH		= ${TCL_VFS_ROOT}/tcl_library
+
+HOST_CC			= @CC_FOR_BUILD@
+HOST_EXEEXT		= @EXEEXT_FOR_BUILD@
+HOST_OBJEXT		= @OBJEXT_FOR_BUILD@
+ZIPFS_BUILD		= @ZIPFS_BUILD@
+NATIVE_ZIP		= @ZIP_PROG@
+ZIP_PROG_OPTIONS	= @ZIP_PROG_OPTIONS@
+ZIP_PROG_VFSSEARCH	= @ZIP_PROG_VFSSEARCH@
+SHARED_BUILD		= @SHARED_BUILD@
+INSTALL_LIBRARIES	= @INSTALL_LIBRARIES@
+INSTALL_MSGS		= @INSTALL_MSGS@
+
+# Minizip
+MINIZIP_OBJS = \
+	adler32.$(HOST_OBJEXT) \
+	compress.$(HOST_OBJEXT) \
+	crc32.$(HOST_OBJEXT) \
+	deflate.$(HOST_OBJEXT) \
+	infback.$(HOST_OBJEXT) \
+	inffast.$(HOST_OBJEXT) \
+	inflate.$(HOST_OBJEXT) \
+	inftrees.$(HOST_OBJEXT) \
+	ioapi.$(HOST_OBJEXT) \
+	trees.$(HOST_OBJEXT) \
+	uncompr.$(HOST_OBJEXT) \
+	zip.$(HOST_OBJEXT) \
+	zutil.$(HOST_OBJEXT) \
+	minizip.$(HOST_OBJEXT)
+
+ZIP_INSTALL_OBJS	= @ZIP_INSTALL_OBJS@
+
 #--------------------------------------------------------------------------
 # Start of rules
 #--------------------------------------------------------------------------
@@ -632,15 +675,28 @@ libraries:
 
 doc:
 
+tclzipfile: ${TCL_ZIP_FILE}
+
+${TCL_ZIP_FILE}: ${ZIP_INSTALL_OBJS}
+	@rm -rf ${TCL_VFS_ROOT}
+	@mkdir -p ${TCL_VFS_PATH}
+	cp -a $(TOP_DIR)/library/* ${TCL_VFS_PATH}
+	-find ${TCL_VFS_ROOT} -type d -empty -delete
+	( cd ${TCL_VFS_ROOT} ; ${NATIVE_ZIP} ${ZIP_PROG_OPTIONS} ../${TCL_ZIP_FILE} ${ZIP_PROG_VFSSEARCH})
+
 # The following target is configured by autoconf to generate either a shared
 # library or non-shared library for Tcl.
-${LIB_FILE}: ${STUB_LIB_FILE} ${OBJS}
+${LIB_FILE}: ${STUB_LIB_FILE} ${OBJS} ${TCL_ZIP_FILE}
 	rm -f $@
 	@MAKE_LIB@
+ifeq (${ZIPFS_BUILD},1)
+	cat ${TCL_ZIP_FILE} >> ${LIB_FILE}
+	${NATIVE_ZIP} -A ${LIB_FILE}
+endif
 
 ${STUB_LIB_FILE}: ${STUB_LIB_OBJS}
-	@if test "x${LIB_FILE}" = "xlibtcl${MAJOR_VERSION}.${MINOR_VERSION}.dll"; then \
-	    (cd ${TOP_DIR}/win; ${MAKE} winextensions); \
+	@if [ "x${LIB_FILE}" = "xlibtcl${MAJOR_VERSION}.${MINOR_VERSION}.dll" ] ; then \
+	    ( cd ${TOP_DIR}/win; ${MAKE} winextensions ); \
 	fi
 	rm -f $@
 	@MAKE_STUB_LIB@
@@ -670,13 +726,14 @@ Makefile: $(UNIX_DIR)/Makefile.in $(DLTEST_DIR)/Makefile.in
 
 clean: clean-packages
 	rm -rf *.a *.o libtcl* core errs *~ \#* TAGS *.E a.out \
-		errors ${TCL_EXE} ${TCLTEST_EXE} lib.exp Tcl @DTRACE_HDR@
-	cd dltest ; $(MAKE) clean
+		errors ${TCL_EXE} ${TCLTEST_EXE} lib.exp Tcl @DTRACE_HDR@ \
+		minizip${HOST_EXEEXT} *.${HOST_OBJEXT} *.zip *.vfs
+	(cd dltest ; $(MAKE) clean)
 
 distclean: distclean-packages clean
 	rm -rf Makefile config.status config.cache config.log tclConfig.sh \
 		tclConfig.h *.plist Tcl.framework tcl.pc
-	cd dltest ; $(MAKE) distclean
+	(cd dltest ; $(MAKE) distclean)
 
 depend:
 	makedepend -- $(DEPEND_SWITCHES) -- $(SRCS)
@@ -731,13 +788,14 @@ gdb-test: ${TCLTEST_EXE}
 	@echo "set env TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" >> gdb.run
 	@echo "set args $(TOP_DIR)/tests/all.tcl $(TESTFLAGS) -singleproc 1" >> gdb.run
 	$(GDB) ./${TCLTEST_EXE} --command=gdb.run
-	rm gdb.run
+	@rm gdb.run
 
 lldb-test: ${TCLTEST_EXE}
 	@echo "settings set target.env-vars @LD_LIBRARY_PATH_VAR@=`pwd`:$${@LD_LIBRARY_PATH_VAR@}" > lldb.run
 	@echo "settings set target.env-vars TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" >> lldb.run
-	$(LLDB) --source lldb.run ./${TCLTEST_EXE} -- $(TOP_DIR)/tests/all.tcl $(TESTFLAGS) -singleproc 1
-	rm lldb.run
+	$(LLDB) --source lldb.run ./${TCLTEST_EXE} -- $(TOP_DIR)/tests/all.tcl \
+		$(TESTFLAGS) -singleproc 1
+	@rm lldb.run
 
 # Useful target to launch a built tcltest with the proper path,...
 runtest: ${TCLTEST_EXE}
@@ -771,7 +829,9 @@ gdb: ${TCL_EXE}
 	$(SHELL_ENV) $(GDB) ./${TCL_EXE}
 
 valgrind: ${TCL_EXE} ${TCLTEST_EXE}
-	$(SHELL_ENV) $(VALGRIND) $(VALGRINDARGS) ./${TCLTEST_EXE} $(TOP_DIR)/tests/all.tcl -singleproc 1 -constraints valgrind $(TESTFLAGS)
+	$(SHELL_ENV) $(VALGRIND) $(VALGRINDARGS) ./${TCLTEST_EXE} \
+		$(TOP_DIR)/tests/all.tcl -singleproc 1 -constraints valgrind \
+		$(TESTFLAGS)
 
 valgrindshell: ${TCL_EXE}
 	$(SHELL_ENV) $(VALGRIND) $(VALGRINDARGS) ./${TCL_EXE} $(SCRIPT)
@@ -786,7 +846,7 @@ trace-test: ${TCLTEST_EXE}
 # Installation rules
 #--------------------------------------------------------------------------
 
-INSTALL_BASE_TARGETS = install-binaries install-libraries install-msgs $(INSTALL_TZDATA)
+INSTALL_BASE_TARGETS = install-binaries $(INSTALL_LIBRARIES) $(INSTALL_MSGS) $(INSTALL_TZDATA)
 INSTALL_DOC_TARGETS = install-doc
 INSTALL_PACKAGE_TARGETS = install-packages
 INSTALL_DEV_TARGETS = install-headers
@@ -803,14 +863,12 @@ install-strip:
 
 install-binaries: binaries
 	@for i in "$(LIB_INSTALL_DIR)" "$(BIN_INSTALL_DIR)" \
-		"$(CONFIG_INSTALL_DIR)"; \
-	    do \
+		"$(CONFIG_INSTALL_DIR)" ; do \
 	    if [ ! -d "$$i" ] ; then \
 		echo "Making directory $$i"; \
 		$(INSTALL_DATA_DIR) "$$i"; \
-		else true; \
-		fi; \
-	    done;
+	    fi; \
+	done
 	@echo "Installing $(LIB_FILE) to $(DLL_INSTALL_DIR)/"
 	@@INSTALL_LIB@
 	@chmod 555 "$(DLL_INSTALL_DIR)/$(LIB_FILE)"
@@ -830,65 +888,77 @@ install-binaries: binaries
 	@$(INSTALL_DATA_DIR) $(LIB_INSTALL_DIR)/pkgconfig
 	@$(INSTALL_DATA) tcl.pc $(LIB_INSTALL_DIR)/pkgconfig/tcl.pc
 
+install-libraries-zipfs-shared: libraries
+	@for i in "$(SCRIPT_INSTALL_DIR)" ; do \
+	    if [ ! -d "$$i" ] ; then \
+		echo "Making directory $$i"; \
+		$(INSTALL_DATA_DIR) "$$i"; \
+	    fi; \
+	done
+	@echo "Installing library files to $(SCRIPT_INSTALL_DIR)/"
+	@for i in $(UNIX_DIR)/tclAppInit.c @LDAIX_SRC@ @DTRACE_SRC@ ; do \
+	    $(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"; \
+	done
+
+install-libraries-zipfs-static: install-libraries-zipfs-shared
+	$(INSTALL_DATA) ${TCL_ZIP_FILE} "$(LIB_INSTALL_DIR)"
+
+MODULE_INSTALL_DIR=$(SCRIPT_INSTALL_DIR)/..
+
 install-libraries: libraries
-	@for i in "$(SCRIPT_INSTALL_DIR)"; \
-	    do \
+	@for i in "$(SCRIPT_INSTALL_DIR)" ; do \
 	    if [ ! -d "$$i" ] ; then \
 		echo "Making directory $$i"; \
 		$(INSTALL_DATA_DIR) "$$i"; \
-		else true; \
-		fi; \
-	    done;
-	@for i in opt0.4 encoding ../tcl8 ../tcl8/8.4  ../tcl8/8.4/platform ../tcl8/8.5 ../tcl8/8.6 ../tcl8/8.7; \
-	    do \
+	    fi; \
+	done
+	@for i in opt0.4 encoding ../tcl8 ../tcl8/8.4  ../tcl8/8.4/platform ../tcl8/8.5 ../tcl8/8.6 ../tcl8/8.7 ; do \
 	    if [ ! -d "$(SCRIPT_INSTALL_DIR)"/$$i ] ; then \
 		echo "Making directory $(SCRIPT_INSTALL_DIR)/$$i"; \
 		$(INSTALL_DATA_DIR) "$(SCRIPT_INSTALL_DIR)"/$$i; \
-		else true; \
-		fi; \
-	    done;
-	@echo "Installing library files to $(SCRIPT_INSTALL_DIR)/";
+	    fi; \
+	done
+	@echo "Installing library files to $(SCRIPT_INSTALL_DIR)/"
 	@for i in $(TOP_DIR)/library/*.tcl $(TOP_DIR)/library/tclIndex \
-		$(UNIX_DIR)/tclAppInit.c @LDAIX_SRC@ @DTRACE_SRC@; \
-	    do \
+		$(UNIX_DIR)/tclAppInit.c @LDAIX_SRC@ @DTRACE_SRC@ ; do \
 	    $(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"; \
-	    done;
-	@echo "Installing package http 2.8.13 as a Tcl Module";
-	@$(INSTALL_DATA) $(TOP_DIR)/library/http/http.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.6/http-2.8.13.tm;
-	@echo "Installing package opt0.4 files to $(SCRIPT_INSTALL_DIR)/opt0.4/";
-	@for i in $(TOP_DIR)/library/opt/*.tcl ; \
-	    do \
+	done
+	@echo "Installing package http 2.9.0 as a Tcl Module"
+	@$(INSTALL_DATA) $(TOP_DIR)/library/http/http.tcl \
+		"$(MODULE_INSTALL_DIR)"/tcl8/8.6/http-2.9.0.tm
+	@echo "Installing package opt0.4 files to $(SCRIPT_INSTALL_DIR)/opt0.4/"
+	@for i in $(TOP_DIR)/library/opt/*.tcl ; do \
 	    $(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/opt0.4; \
-	    done;
-	@echo "Installing package msgcat 1.7.0 as a Tcl Module";
-	@$(INSTALL_DATA) $(TOP_DIR)/library/msgcat/msgcat.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.7/msgcat-1.7.0.tm;
-	@echo "Installing package tcltest 2.4.1 as a Tcl Module";
-	@$(INSTALL_DATA) $(TOP_DIR)/library/tcltest/tcltest.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.5/tcltest-2.4.1.tm;
-
-	@echo "Installing package platform 1.0.14 as a Tcl Module";
-	@$(INSTALL_DATA) $(TOP_DIR)/library/platform/platform.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.4/platform-1.0.14.tm;
-	@echo "Installing package platform::shell 1.1.4 as a Tcl Module";
-	@$(INSTALL_DATA) $(TOP_DIR)/library/platform/shell.tcl "$(SCRIPT_INSTALL_DIR)"/../tcl8/8.4/platform/shell-1.1.4.tm;
-
-	@echo "Installing encoding files to $(SCRIPT_INSTALL_DIR)/encoding/";
+	done
+	@echo "Installing package msgcat 1.7.0 as a Tcl Module"
+	@$(INSTALL_DATA) $(TOP_DIR)/library/msgcat/msgcat.tcl \
+		"$(MODULE_INSTALL_DIR)"/tcl8/8.7/msgcat-1.7.0.tm
+	@echo "Installing package tcltest 2.4.1 as a Tcl Module"
+	@$(INSTALL_DATA) $(TOP_DIR)/library/tcltest/tcltest.tcl \
+		"$(MODULE_INSTALL_DIR)"/tcl8/8.5/tcltest-2.4.1.tm
+	@echo "Installing package platform 1.0.14 as a Tcl Module"
+	@$(INSTALL_DATA) $(TOP_DIR)/library/platform/platform.tcl \
+		"$(MODULE_INSTALL_DIR)"/tcl8/8.4/platform-1.0.14.tm
+	@echo "Installing package platform::shell 1.1.4 as a Tcl Module"
+	@$(INSTALL_DATA) $(TOP_DIR)/library/platform/shell.tcl \
+		"$(MODULE_INSTALL_DIR)"/tcl8/8.4/platform/shell-1.1.4.tm
+	@echo "Installing encoding files to $(SCRIPT_INSTALL_DIR)/encoding/"
 	@for i in $(TOP_DIR)/library/encoding/*.enc ; do \
 		$(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/encoding; \
-	done;
-	@if [ -n "$(TCL_MODULE_PATH)" -a -f $(TOP_DIR)/library/tm.tcl ]; then \
+	done
+	@if [ -n "$(TCL_MODULE_PATH)" -a -f $(TOP_DIR)/library/tm.tcl ] ; then \
 	    echo "Customizing tcl module path"; \
 	    echo "if {![interp issafe]} { ::tcl::tm::roots {$(TCL_MODULE_PATH)} }" >> \
 	        "$(SCRIPT_INSTALL_DIR)"/tm.tcl; \
 	fi
 
 install-tzdata:
-	@for i in tzdata; \
-	    do \
+	@for i in tzdata ; do \
 	    if [ ! -d "$(SCRIPT_INSTALL_DIR)"/$$i ] ; then \
 		echo "Making directory $(SCRIPT_INSTALL_DIR)/$$i"; \
 		$(INSTALL_DATA_DIR) "$(SCRIPT_INSTALL_DIR)"/$$i; \
-		else true; \
-		fi; \
-	    done;
+	    fi; \
+	done
 	@echo "Installing time zone files to $(SCRIPT_INSTALL_DIR)/tzdata/"
 	@for i in $(TOP_DIR)/library/tzdata/* ; do \
 	    if [ -d $$i ] ; then \
@@ -912,86 +982,80 @@ install-tzdata:
 	    else \
 		$(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/tzdata; \
 	    fi; \
-	done;
+	done
 
 install-msgs:
-	@for i in msgs; \
-	    do \
+	@for i in msgs ; do \
 	    if [ ! -d "$(SCRIPT_INSTALL_DIR)"/$$i ] ; then \
 		echo "Making directory $(SCRIPT_INSTALL_DIR)/$$i"; \
 		$(INSTALL_DATA_DIR) "$(SCRIPT_INSTALL_DIR)"/$$i; \
-		else true; \
-		fi; \
-	    done;
+	    fi; \
+	done
 	@echo "Installing message catalog files to $(SCRIPT_INSTALL_DIR)/msgs/"
 	@for i in $(TOP_DIR)/library/msgs/*.msg ; do \
-		$(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/msgs; \
-	done;
+	    $(INSTALL_DATA) $$i "$(SCRIPT_INSTALL_DIR)"/msgs; \
+	done
 
 install-doc: doc
-	@for i in "$(MAN_INSTALL_DIR)" "$(MAN1_INSTALL_DIR)" "$(MAN3_INSTALL_DIR)" "$(MANN_INSTALL_DIR)" ; \
-	    do \
+	@for i in "$(MAN_INSTALL_DIR)" "$(MAN1_INSTALL_DIR)" "$(MAN3_INSTALL_DIR)" "$(MANN_INSTALL_DIR)" ; do \
 	    if [ ! -d "$$i" ] ; then \
 		echo "Making directory $$i"; \
 		$(INSTALL_DATA_DIR) "$$i"; \
-		else true; \
-		fi; \
-	    done;
-	@echo "Installing and cross-linking top-level (.1) docs to $(MAN1_INSTALL_DIR)/";
-	@for i in $(TOP_DIR)/doc/*.1; do \
+	    fi; \
+	done
+	@echo "Installing and cross-linking top-level (.1) docs to $(MAN1_INSTALL_DIR)/"
+	@for i in $(TOP_DIR)/doc/*.1 ; do \
 	    $(SHELL) $(UNIX_DIR)/installManPage $(MAN_FLAGS) $$i "$(MAN1_INSTALL_DIR)"; \
 	done
-
-	@echo "Installing and cross-linking C API (.3) docs to $(MAN3_INSTALL_DIR)/";
-	@for i in $(TOP_DIR)/doc/*.3; do \
+	@echo "Installing and cross-linking C API (.3) docs to $(MAN3_INSTALL_DIR)/"
+	@for i in $(TOP_DIR)/doc/*.3 ; do \
 	    $(SHELL) $(UNIX_DIR)/installManPage $(MAN_FLAGS) $$i "$(MAN3_INSTALL_DIR)"; \
 	done
-
 	@echo "Installing and cross-linking command (.n) docs to $(MANN_INSTALL_DIR)/";
-	@for i in $(TOP_DIR)/doc/*.n; do \
+	@for i in $(TOP_DIR)/doc/*.n ; do \
 	    $(SHELL) $(UNIX_DIR)/installManPage $(MAN_FLAGS) $$i "$(MANN_INSTALL_DIR)"; \
 	done
 
+# Public headers that define Tcl's API
+TCL_PUBLIC_HEADERS = $(GENERIC_DIR)/tcl.h $(GENERIC_DIR)/tclDecls.h \
+	$(GENERIC_DIR)/tclOO.h $(GENERIC_DIR)/tclOODecls.h \
+	$(GENERIC_DIR)/tclPlatDecls.h $(GENERIC_DIR)/tclTomMath.h \
+	$(GENERIC_DIR)/tclTomMathDecls.h
+# Private headers that define Tcl's internal API
+TCL_PRIVATE_HEADERS = $(GENERIC_DIR)/tclInt.h $(GENERIC_DIR)/tclIntDecls.h \
+	$(GENERIC_DIR)/tclIntPlatDecls.h $(GENERIC_DIR)/tclPort.h \
+	$(GENERIC_DIR)/tclOOInt.h $(GENERIC_DIR)/tclOOIntDecls.h \
+	$(UNIX_DIR)/tclUnixPort.h
+# Any other headers you find in the Tcl sources are purely part of Tcl's
+# implementation, and aren't to be installed.
+
 install-headers:
-	@for i in "$(INCLUDE_INSTALL_DIR)"; \
-	    do \
+	@for i in "$(INCLUDE_INSTALL_DIR)" ; do \
 	    if [ ! -d "$$i" ] ; then \
 		echo "Making directory $$i"; \
 		$(INSTALL_DATA_DIR) "$$i"; \
-		else true; \
-		fi; \
-	    done;
+	    fi; \
+	done
 	@echo "Installing header files to $(INCLUDE_INSTALL_DIR)/";
-	@for i in $(GENERIC_DIR)/tcl.h $(GENERIC_DIR)/tclDecls.h \
-		$(GENERIC_DIR)/tclOO.h $(GENERIC_DIR)/tclOODecls.h \
-		$(GENERIC_DIR)/tclPlatDecls.h \
-		$(GENERIC_DIR)/tclTomMath.h \
-		$(GENERIC_DIR)/tclTomMathDecls.h ; \
-	    do \
+	@for i in $(TCL_PUBLIC_HEADERS) ; do \
 	    $(INSTALL_DATA) $$i "$(INCLUDE_INSTALL_DIR)"; \
-	    done;
+	done
 
 # Optional target to install private headers
 install-private-headers:
-	@for i in "$(PRIVATE_INCLUDE_INSTALL_DIR)"; \
-	    do \
+	@for i in "$(PRIVATE_INCLUDE_INSTALL_DIR)" ; do \
 	    if [ ! -d "$$i" ] ; then \
 		echo "Making directory $$i"; \
 		$(INSTALL_DATA_DIR) "$$i"; \
-		else true; \
-		fi; \
-	    done;
+	    fi; \
+	done
 	@echo "Installing private header files to $(PRIVATE_INCLUDE_INSTALL_DIR)/";
-	@for i in $(GENERIC_DIR)/tclInt.h $(GENERIC_DIR)/tclIntDecls.h \
-		$(GENERIC_DIR)/tclIntPlatDecls.h $(GENERIC_DIR)/tclPort.h \
-		$(GENERIC_DIR)/tclOOInt.h $(GENERIC_DIR)/tclOOIntDecls.h \
-		$(UNIX_DIR)/tclUnixPort.h; \
-	    do \
+	@for i in $(TCL_PRIVATE_HEADERS) ; do \
 	    $(INSTALL_DATA) $$i "$(PRIVATE_INCLUDE_INSTALL_DIR)"; \
-	    done;
-	@if test -f tclConfig.h; then\
+	done
+	@if test -f tclConfig.h ; then \
 	    $(INSTALL_DATA) tclConfig.h "$(PRIVATE_INCLUDE_INSTALL_DIR)"; \
-	    fi;
+	fi
 
 #--------------------------------------------------------------------------
 # Rules for how to compile C files
@@ -1010,42 +1074,45 @@ tclTestInit.o: $(UNIX_DIR)/tclAppInit.c ${TCL_EXE}
 	@if test -f tclAppInit.o ; then \
 	    rm -f tclAppInit.sav; \
 	    mv tclAppInit.o tclAppInit.sav; \
-	fi;
+	fi
 	$(CC) -c $(APP_CC_SWITCHES) \
 		-DTCL_BUILDTIME_LIBRARY="\"${TCL_BUILDTIME_LIBRARY}\"" \
 		-DTCL_TEST $(UNIX_DIR)/tclAppInit.c
-	rm -f tclTestInit.o
+	@rm -f tclTestInit.o
 	mv tclAppInit.o tclTestInit.o
 	@if test -f tclAppInit.sav ; then \
 	    mv tclAppInit.sav tclAppInit.o; \
-	fi;
+	fi
 
 xtTestInit.o: $(UNIX_DIR)/tclAppInit.c ${TCL_EXE}
 	@if test -f tclAppInit.o ; then \
 	    rm -f tclAppInit.sav; \
 	    mv tclAppInit.o tclAppInit.sav; \
-	fi;
+	fi
 	$(CC) -c $(APP_CC_SWITCHES) \
 		-DTCL_BUILDTIME_LIBRARY="\"${TCL_BUILDTIME_LIBRARY}\"" \
 		-DTCL_TEST -DTCL_XT_TEST $(UNIX_DIR)/tclAppInit.c
-	rm -f xtTestInit.o
+	@rm -f xtTestInit.o
 	mv tclAppInit.o xtTestInit.o
 	@if test -f tclAppInit.sav ; then \
 	    mv tclAppInit.sav tclAppInit.o; \
-	fi;
+	fi
 
 # Object files used on all Unix systems:
 
-REGHDRS=$(GENERIC_DIR)/regex.h $(GENERIC_DIR)/regguts.h \
-		$(GENERIC_DIR)/regcustom.h
-TCLREHDRS=$(GENERIC_DIR)/tclRegexp.h
-COMPILEHDR=$(GENERIC_DIR)/tclCompile.h
-FSHDR=$(GENERIC_DIR)/tclFileSystem.h
-IOHDR=$(GENERIC_DIR)/tclIO.h
-MATHHDRS=$(GENERIC_DIR)/tommath.h $(GENERIC_DIR)/tclTomMath.h
-PARSEHDR=$(GENERIC_DIR)/tclParse.h
-NREHDR=$(GENERIC_DIR)/tclInt.h
-TRIMHDR=$(GENERIC_DIR)/tclStringTrim.h
+REGHDRS		= $(GENERIC_DIR)/regex.h $(GENERIC_DIR)/regguts.h \
+	$(GENERIC_DIR)/regcustom.h
+TCLREHDRS	= $(GENERIC_DIR)/tclRegexp.h
+COMPILEHDR	= $(GENERIC_DIR)/tclCompile.h
+FSHDR		= $(GENERIC_DIR)/tclFileSystem.h
+IOHDR		= $(GENERIC_DIR)/tclIO.h
+MATHHDRS	= $(GENERIC_DIR)/tommath.h $(GENERIC_DIR)/tclTomMath.h
+PARSEHDR	= $(GENERIC_DIR)/tclParse.h
+NREHDR		= $(GENERIC_DIR)/tclInt.h
+TRIMHDR		= $(GENERIC_DIR)/tclStringTrim.h
+
+TCL_LOCATIONS	= -DTCL_LIBRARY="\"${TCL_LIBRARY}\"" \
+	-DTCL_PACKAGE_PATH="\"${TCL_PACKAGE_PATH}\""
 
 regcomp.o: $(REGHDRS) $(GENERIC_DIR)/regcomp.c $(GENERIC_DIR)/regc_lex.c \
 		$(GENERIC_DIR)/regc_color.c $(GENERIC_DIR)/regc_locale.c \
@@ -1274,19 +1341,19 @@ tclPkg.o: $(GENERIC_DIR)/tclPkg.c
 # prefix/exec_prefix but all the different paths individually.
 
 tclPkgConfig.o: $(GENERIC_DIR)/tclPkgConfig.c
-	$(CC) -c $(CC_SWITCHES)					\
+	$(CC) -c $(CC_SWITCHES) \
 		-DCFG_INSTALL_LIBDIR="\"$(LIB_INSTALL_DIR)\"" \
 		-DCFG_INSTALL_BINDIR="\"$(BIN_INSTALL_DIR)\"" \
 		-DCFG_INSTALL_SCRDIR="\"$(SCRIPT_INSTALL_DIR)\"" \
 		-DCFG_INSTALL_INCDIR="\"$(INCLUDE_INSTALL_DIR)\"" \
 		-DCFG_INSTALL_DOCDIR="\"$(MAN_INSTALL_DIR)\"" \
-		\
 		-DCFG_RUNTIME_LIBDIR="\"$(libdir)\"" \
 		-DCFG_RUNTIME_BINDIR="\"$(bindir)\"" \
 		-DCFG_RUNTIME_SCRDIR="\"$(TCL_LIBRARY)\"" \
 		-DCFG_RUNTIME_INCDIR="\"$(includedir)\"" \
 		-DCFG_RUNTIME_DOCDIR="\"$(mandir)\"" \
-		\
+		-DCFG_RUNTIME_DLLFILE="\"$(TCL_LIB_FILE)\"" \
+		-DCFG_RUNTIME_ZIPFILE="\"$(TCL_ZIP_FILE)\"" \
 		$(GENERIC_DIR)/tclPkgConfig.c
 
 tclPosixStr.o: $(GENERIC_DIR)/tclPosixStr.c
@@ -1337,6 +1404,15 @@ tclVar.o: $(GENERIC_DIR)/tclVar.c
 tclZlib.o: $(GENERIC_DIR)/tclZlib.c
 	$(CC) -c $(CC_SWITCHES) $(ZLIB_INCLUDE) $(GENERIC_DIR)/tclZlib.c
 
+tclZipfs.o: $(GENERIC_DIR)/tclZipfs.c
+	$(CC) -c $(CC_SWITCHES) \
+		-DCFG_RUNTIME_DLLFILE="\"$(TCL_LIB_FILE)\"" \
+		-DCFG_RUNTIME_ZIPFILE="\"$(TCL_ZIP_FILE)\"" \
+		-DCFG_RUNTIME_LIBDIR="\"$(libdir)\"" \
+		-DCFG_RUNTIME_SCRDIR="\"$(TCL_LIBRARY)\"" \
+		$(ZLIB_INCLUDE) -I$(ZLIB_DIR)/contrib/minizip \
+		$(GENERIC_DIR)/tclZipfs.c
+
 tclTest.o: $(GENERIC_DIR)/tclTest.c $(IOHDR) $(TCLREHDRS)
 	$(CC) -c $(APP_CC_SWITCHES) $(GENERIC_DIR)/tclTest.c
 
@@ -1613,7 +1689,6 @@ tclUnixThrd.o: $(UNIX_DIR)/tclUnixThrd.c
 tclUnixTime.o: $(UNIX_DIR)/tclUnixTime.c
 	$(CC) -c $(CC_SWITCHES) $(UNIX_DIR)/tclUnixTime.c
 
-TCL_LOCATIONS=-DTCL_LIBRARY="\"${TCL_LIBRARY}\"" -DTCL_PACKAGE_PATH="\"${TCL_PACKAGE_PATH}\""
 tclUnixInit.o: $(UNIX_DIR)/tclUnixInit.c tclConfig.sh
 	$(CC) -c $(CC_SWITCHES) $(TCL_LOCATIONS) $(UNIX_DIR)/tclUnixInit.c
 
@@ -1745,6 +1820,57 @@ tclOOStubLib.o: $(GENERIC_DIR)/tclOOStubLib.c
 	$(CC) -c $(CC_SWITCHES) $<
 
 #--------------------------------------------------------------------------
+# Minizip implementation
+#--------------------------------------------------------------------------
+adler32.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/adler32.c
+
+compress.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/compress.c
+
+crc32.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/crc32.c
+
+deflate.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/deflate.c
+
+ioapi.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -DIOAPI_NO_64 -I$(ZLIB_DIR) -I$(ZLIB_DIR)/contrib/minizip -c \
+		$(ZLIB_DIR)/contrib/minizip/ioapi.c
+
+infback.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/infback.c
+
+inffast.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/inffast.c
+
+inflate.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/inflate.c
+
+inftrees.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/inftrees.c
+
+trees.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/trees.c
+
+uncompr.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/uncompr.c
+
+zip.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -I$(ZLIB_DIR)/contrib/minizip -c \
+		$(ZLIB_DIR)/contrib/minizip/zip.c
+
+zutil.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/zutil.c
+
+minizip.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -DIOAPI_NO_64 -I$(ZLIB_DIR) -I$(ZLIB_DIR)/contrib/minizip -c \
+		$(ZLIB_DIR)/contrib/minizip/minizip.c
+
+minizip${HOST_EXEEXT}: $(MINIZIP_OBJS)
+	$(HOST_CC) -o $@ $(MINIZIP_OBJS)
+
+#--------------------------------------------------------------------------
 # Bundled Package targets
 #--------------------------------------------------------------------------
 
@@ -1757,94 +1883,94 @@ PKG_CFG_ARGS		= @PKG_CFG_ARGS@
 PKG_DIR			= ./pkgs
 
 configure-packages:
-	@for i in $(PKGS_DIR)/*; do \
-	  if [ -d $$i ]; then \
-	    if [ -x $$i/configure ]; then \
-	      pkg=`basename $$i`; \
-	      echo "Configuring package '$$pkg'"; \
-	      mkdir -p $(PKG_DIR)/$$pkg; \
-	      if [ ! -f $(PKG_DIR)/$$pkg/Makefile ]; then \
-		( cd $(PKG_DIR)/$$pkg; \
-		  $$i/configure --with-tcl=../.. \
-		      --with-tclinclude=$(GENERIC_DIR) \
-		      $(PKG_CFG_ARGS) --libdir=$(PACKAGE_DIR) \
-		      --enable-shared; ) || exit $$?; \
-	      fi; \
+	@for i in $(PKGS_DIR)/* ; do \
+	    if [ -d $$i ] ; then \
+		if [ -x $$i/configure ] ; then \
+		    pkg=`basename $$i`; \
+		    echo "Configuring package '$$pkg'"; \
+		    mkdir -p $(PKG_DIR)/$$pkg; \
+		    if [ ! -f $(PKG_DIR)/$$pkg/Makefile ] ; then \
+			( cd $(PKG_DIR)/$$pkg; \
+			  $$i/configure --with-tcl=../.. \
+			      --with-tclinclude=$(GENERIC_DIR) \
+			      $(PKG_CFG_ARGS) --libdir=$(PACKAGE_DIR) \
+			      --enable-shared; ) || exit $$?; \
+		    fi; \
+		fi; \
 	    fi; \
-	  fi; \
 	done
 
 packages: configure-packages ${STUB_LIB_FILE}
-	@for i in $(PKGS_DIR)/*; do \
-	  if [ -d $$i ]; then \
-	    pkg=`basename $$i`; \
-	    if [ -f $(PKG_DIR)/$$pkg/Makefile ]; then \
-	      echo "Building package '$$pkg'"; \
-	      ( cd $(PKG_DIR)/$$pkg; $(MAKE); ) || exit $$?; \
+	@for i in $(PKGS_DIR)/* ; do \
+	    if [ -d $$i ] ; then \
+		pkg=`basename $$i`; \
+		if [ -f $(PKG_DIR)/$$pkg/Makefile ] ; then \
+		    echo "Building package '$$pkg'"; \
+		    ( cd $(PKG_DIR)/$$pkg; $(MAKE); ) || exit $$?; \
+		fi; \
 	    fi; \
-	  fi; \
 	done
 
 install-packages: packages
-	@for i in $(PKGS_DIR)/*; do \
-	  if [ -d $$i ]; then \
-	    pkg=`basename $$i`; \
-	    if [ -f $(PKG_DIR)/$$pkg/Makefile ]; then \
-	      echo "Installing package '$$pkg'"; \
-	      ( cd $(PKG_DIR)/$$pkg; $(MAKE) install \
-		  "DESTDIR=$(INSTALL_ROOT)"; ) || exit $$?; \
+	@for i in $(PKGS_DIR)/* ; do \
+	    if [ -d $$i ] ; then \
+		pkg=`basename $$i`; \
+		if [ -f $(PKG_DIR)/$$pkg/Makefile ] ; then \
+		    echo "Installing package '$$pkg'"; \
+		    ( cd $(PKG_DIR)/$$pkg; $(MAKE) install \
+			  "DESTDIR=$(INSTALL_ROOT)"; ) || exit $$?; \
+		fi; \
 	    fi; \
-	  fi; \
 	done
 
 test-packages: ${TCLTEST_EXE} packages
-	@for i in $(PKGS_DIR)/*; do \
-	  if [ -d $$i ]; then \
-	    pkg=`basename $$i`; \
-	    if [ -f $(PKG_DIR)/$$pkg/Makefile ]; then \
-	      echo "Testing package '$$pkg'"; \
-	      ( cd $(PKG_DIR)/$$pkg; $(MAKE) \
-		  "@LD_LIBRARY_PATH_VAR@=../..:$${@LD_LIBRARY_PATH_VAR@}" \
-		  "TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" \
-		  "TCLLIBPATH=../../pkgs" test \
-		  "TCLSH_PROG=../../${TCLTEST_EXE}"; ) \
+	@for i in $(PKGS_DIR)/* ; do \
+	    if [ -d $$i ] ; then \
+		pkg=`basename $$i`; \
+		if [ -f $(PKG_DIR)/$$pkg/Makefile ] ; then \
+		    echo "Testing package '$$pkg'"; \
+		    ( cd $(PKG_DIR)/$$pkg; $(MAKE) \
+			  "@LD_LIBRARY_PATH_VAR@=../..:$${@LD_LIBRARY_PATH_VAR@}" \
+			  "TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" \
+			  "TCLLIBPATH=../../pkgs" test \
+			  "TCLSH_PROG=../../${TCLTEST_EXE}"; ) \
+		fi; \
 	    fi; \
-	  fi; \
 	done
 
 clean-packages:
-	@for i in $(PKGS_DIR)/*; do \
-	  if [ -d $$i ]; then \
-	    pkg=`basename $$i`; \
-	    if [ -f $(PKG_DIR)/$$pkg/Makefile ]; then \
-	      ( cd $(PKG_DIR)/$$pkg; $(MAKE) clean; ) \
+	@for i in $(PKGS_DIR)/* ; do \
+	    if [ -d $$i ] ; then \
+		pkg=`basename $$i`; \
+		if [ -f $(PKG_DIR)/$$pkg/Makefile ] ; then \
+		    ( cd $(PKG_DIR)/$$pkg; $(MAKE) clean; ) \
+		fi; \
 	    fi; \
-	  fi; \
 	done
 
 distclean-packages:
-	@for i in $(PKGS_DIR)/*; do \
-	  if [ -d $$i ]; then \
-	    pkg=`basename $$i`; \
-	    if [ -f $(PKG_DIR)/$$pkg/Makefile ]; then \
-	      ( cd $(PKG_DIR)/$$pkg; $(MAKE) distclean; ) \
+	@for i in $(PKGS_DIR)/* ; do \
+	    if [ -d $$i ] ; then \
+		pkg=`basename $$i`; \
+		if [ -f $(PKG_DIR)/$$pkg/Makefile ] ; then \
+		    ( cd $(PKG_DIR)/$$pkg; $(MAKE) distclean; ) \
+		fi; \
+		rm -rf $(PKG_DIR)/$$pkg; \
 	    fi; \
-	    rm -rf $(PKG_DIR)/$$pkg; \
-	  fi; \
 	done; \
 	rm -rf $(PKG_DIR)
 
 dist-packages: configure-packages
 	@rm -rf $(DISTROOT)/pkgs; \
 	mkdir -p $(DISTROOT)/pkgs; \
-	for i in $(PKGS_DIR)/*; do \
-	  if [ -d $$i ]; then \
-	    pkg=`basename $$i`; \
-	    if [ -f $(PKG_DIR)/$$pkg/Makefile ]; then \
-	      ( cd $(PKG_DIR)/$$pkg; $(MAKE) dist \
-		  "DIST_ROOT=$(DISTROOT)/pkgs"; ) || exit $$?; \
+	for i in $(PKGS_DIR)/* ; do \
+	    if [ -d $$i ] ; then \
+		pkg=`basename $$i`; \
+		if [ -f $(PKG_DIR)/$$pkg/Makefile ] ; then \
+		    ( cd $(PKG_DIR)/$$pkg; $(MAKE) dist \
+			  "DIST_ROOT=$(DISTROOT)/pkgs"; ) || exit $$?; \
+		fi; \
 	    fi; \
-	  fi; \
 	done
 
 #--------------------------------------------------------------------------
@@ -1859,9 +1985,9 @@ dist-packages: configure-packages
 
 gendate:
 	bison --output-file=$(GENERIC_DIR)/tclDate.c \
-	--no-lines \
-	--name-prefix=TclDate \
-	$(GENERIC_DIR)/tclGetDate.y
+		--no-lines \
+		--name-prefix=TclDate \
+		$(GENERIC_DIR)/tclGetDate.y
 
 #	yacc -l $(GENERIC_DIR)/tclGetDate.y
 #	sed -e 's/yy/TclDate/g' -e '/^#include <values.h>/d' \
@@ -1921,14 +2047,16 @@ genscript:
 checkstubs: $(TCL_LIB_FILE)
 	-@for i in `nm -p $(TCL_LIB_FILE) \
 		| awk '$$2 ~ /^[TDBCS]$$/ { sub("^_", "", $$3); print $$3 }' \
-		| sort -n`; do \
-		match=0; \
-		for j in $(TCL_DECLS); do \
-		    if [ `grep -c "$$i *(" $$j` -gt 0 ]; then \
-			match=1; \
-		    fi; \
-		done; \
-		if [ $$match -eq 0 ]; then echo $$i; fi \
+		| sort -n` ; do \
+	    match=0; \
+	    for j in $(TCL_DECLS) ; do \
+		if [ `grep -c "$$i *(" $$j` -gt 0 ] ; then \
+		    match=1; \
+		fi; \
+	    done; \
+	    if [ $$match -eq 0 ] ; then \
+		echo $$i; \
+	    fi; \
 	done
 
 #
@@ -1938,14 +2066,16 @@ checkstubs: $(TCL_LIB_FILE)
 
 checkdoc: $(TCL_LIB_FILE)
 	-@for i in `nm -p $(TCL_LIB_FILE) | awk '$$3 ~ /Tcl_/ { print $$3 }' \
-		| grep -v 'Cmd$$' | sort -n`; do \
-		match=0; \
-		for j in $(TOP_DIR)/doc/*.3; do \
-		    if [ `grep '\-' $$j | grep -c $$i` -gt 0 ]; then \
-			match=1; \
-		    fi; \
-		done; \
-		if [ $$match -eq 0 ]; then echo $$i; fi \
+		| grep -v 'Cmd$$' | sort -n` ; do \
+	    match=0; \
+	    for j in $(TOP_DIR)/doc/*.3 ; do \
+		if [ `grep '\-' $$j | grep -c $$i` -gt 0 ] ; then \
+		    match=1; \
+		fi; \
+	    done; \
+	    if [ $$match -eq 0 ] ; then \
+		echo $$i; \
+	    fi; \
 	done
 
 #
@@ -1974,14 +2104,14 @@ checkexports: $(TCL_LIB_FILE)
 #
 
 rpm: all
-	rm -f THIS.TCL.SPEC
+	-@rm -f THIS.TCL.SPEC
 	echo "%define _builddir `pwd`" > THIS.TCL.SPEC
 	echo "%define _rpmdir `pwd`/RPMS" >> THIS.TCL.SPEC
 	cat tcl.spec >> THIS.TCL.SPEC
 	mkdir -p RPMS/i386
 	rpmbuild -bb THIS.TCL.SPEC
 	mv RPMS/i386/*.rpm .
-	rm -rf RPMS THIS.TCL.SPEC
+	-rm -rf RPMS THIS.TCL.SPEC
 
 #
 # Target to create a proper Tcl distribution from information in the master
@@ -1993,6 +2123,8 @@ DISTROOT = /tmp/dist
 DISTNAME = tcl${VERSION}${PATCH_LEVEL}
 ZIPNAME	 = tcl${MAJOR_VERSION}${MINOR_VERSION}${PATCH_LEVEL}-src.zip
 DISTDIR	 = $(DISTROOT)/$(DISTNAME)
+BUILTIN_PACKAGE_LIST = http opt msgcat reg dde tcltest platform
+
 $(UNIX_DIR)/configure: $(UNIX_DIR)/configure.ac $(UNIX_DIR)/tcl.m4 \
 		$(UNIX_DIR)/aclocal.m4
 	cd $(UNIX_DIR); autoconf
@@ -2027,11 +2159,10 @@ dist: $(UNIX_DIR)/configure $(UNIX_DIR)/tclConfig.h.in $(UNIX_DIR)/tcl.pc.in $(M
 	@mkdir $(DISTDIR)/library
 	cp -p $(TOP_DIR)/license.terms $(TOP_DIR)/library/*.tcl \
 		$(TOP_DIR)/library/tclIndex $(DISTDIR)/library
-	for i in http opt msgcat reg dde tcltest platform; \
-	    do \
-		mkdir $(DISTDIR)/library/$$i ;\
-		cp -p $(TOP_DIR)/library/$$i/*.tcl $(DISTDIR)/library/$$i; \
-	    done;
+	for i in $(BUILTIN_PACKAGE_LIST) ; do \
+	    mkdir $(DISTDIR)/library/$$i;\
+	    cp -p $(TOP_DIR)/library/$$i/*.tcl $(DISTDIR)/library/$$i; \
+	done
 	@mkdir $(DISTDIR)/library/encoding
 	cp -p $(TOP_DIR)/library/encoding/*.enc $(DISTDIR)/library/encoding
 	@mkdir $(DISTDIR)/library/msgs
@@ -2100,14 +2231,16 @@ dist: $(UNIX_DIR)/configure $(UNIX_DIR)/tclConfig.h.in $(UNIX_DIR)/tcl.pc.in $(M
 	@mkdir $(DISTDIR)/pkgs
 	cp $(TOP_DIR)/pkgs/README $(DISTDIR)/pkgs
 	cp $(TOP_DIR)/pkgs/package.list.txt $(DISTDIR)/pkgs
-	for i in `ls $(DISTROOT)/pkgs/*.tar.gz 2> /dev/null`; do \
+	for i in `ls $(DISTROOT)/pkgs/*.tar.gz 2> /dev/null` ; do \
 	    tar -C $(DISTDIR)/pkgs -xzf "$$i"; \
 	done
 
 alldist: dist
 	rm -f $(DISTROOT)/$(DISTNAME)-src.tar.gz $(DISTROOT)/$(ZIPNAME)
-	cd $(DISTROOT); tar cf $(DISTNAME)-src.tar $(DISTNAME); \
-		gzip -9 $(DISTNAME)-src.tar; zip -qr8 $(ZIPNAME) $(DISTNAME)
+	( cd $(DISTROOT); \
+		tar cf $(DISTNAME)-src.tar $(DISTNAME); \
+		gzip -9 $(DISTNAME)-src.tar; \
+		zip -qr8 $(ZIPNAME) $(DISTNAME) )
 
 #--------------------------------------------------------------------------
 # This target creates the HTML folder for Tcl & Tk and places it in
@@ -2159,6 +2292,7 @@ BUILD_HTML = \
 .PHONY: install-tzdata install-msgs
 .PHONY: packages configure-packages test-packages clean-packages
 .PHONY: dist-packages distclean-packages install-packages
+.PHONY: install-libraries-zipfs-shared install-libraries-zipfs-static tclzipfile
 
 #--------------------------------------------------------------------------
 # DO NOT DELETE THIS LINE -- make depend depends on it.
diff --git a/unix/configure b/unix/configure
index 9eba7f9..2af5144 100755
--- a/unix/configure
+++ b/unix/configure
@@ -664,6 +664,16 @@ TCL_PATCH_LEVEL
 TCL_MINOR_VERSION
 TCL_MAJOR_VERSION
 TCL_VERSION
+INSTALL_MSGS
+INSTALL_LIBRARIES
+TCL_ZIP_FILE
+ZIPFS_BUILD
+ZIP_INSTALL_OBJS
+ZIP_PROG_VFSSEARCH
+ZIP_PROG_OPTIONS
+ZIP_PROG
+EXEEXT_FOR_BUILD
+CC_FOR_BUILD
 DTRACE
 LDFLAGS_DEFAULT
 CFLAGS_DEFAULT
@@ -699,6 +709,7 @@ ZLIB_INCLUDE
 ZLIB_SRCS
 ZLIB_OBJS
 TCLSH_PROG
+SHARED_BUILD
 EGREP
 GREP
 CPP
@@ -747,7 +758,8 @@ PACKAGE_VERSION
 PACKAGE_TARNAME
 PACKAGE_NAME
 PATH_SEPARATOR
-SHELL'
+SHELL
+OBJEXT_FOR_BUILD'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -766,6 +778,7 @@ enable_langinfo
 enable_dll_unloading
 with_tzdata
 enable_dtrace
+enable_zipfs
 enable_framework
 '
       ac_precious_vars='build_alias
@@ -1405,6 +1418,7 @@ Optional Features:
                           startup, otherwise use old heuristic (default: on)
   --enable-dll-unloading  enable the 'unload' command (default: on)
   --enable-dtrace         build with DTrace support (default: off)
+  --enable-zipfs          build with Zipfs support (default: on)
   --enable-framework      package shared libraries in MacOSX frameworks
                           (default: off)
 
@@ -1853,6 +1867,52 @@ $as_echo "$ac_res" >&6; }
 
 } # ac_fn_c_check_func
 
+# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
+# ---------------------------------------------
+# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
+# accordingly.
+ac_fn_c_check_decl ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  as_decl_name=`echo $2|sed 's/ *(.*//'`
+  as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
+$as_echo_n "checking whether $as_decl_name is declared... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+#ifndef $as_decl_name
+#ifdef __cplusplus
+  (void) $as_decl_use;
+#else
+  (void) $as_decl_name;
+#endif
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_c_check_decl
+
 # ac_fn_c_check_type LINENO TYPE VAR INCLUDES
 # -------------------------------------------
 # Tests whether TYPE exists after having included INCLUDES, setting cache
@@ -3270,6 +3330,7 @@ _ACEOF
 esac
 
 
+
 #--------------------------------------------------------------------
 # Supply substitutes for missing POSIX header files.  Special notes:
 #	- stdlib.h doesn't define strtol, strtoul, or
@@ -4396,6 +4457,25 @@ done
 
     LIBS=$ac_saved_libs
 
+    # TIP #509
+    ac_fn_c_check_decl "$LINENO" "PTHREAD_MUTEX_RECURSIVE" "ac_cv_have_decl_PTHREAD_MUTEX_RECURSIVE" "#include <pthread.h>
+"
+if test "x$ac_cv_have_decl_PTHREAD_MUTEX_RECURSIVE" = xyes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_PTHREAD_MUTEX_RECURSIVE $ac_have_decl
+_ACEOF
+if test $ac_have_decl = 1; then :
+  tcl_ok=yes
+else
+  tcl_ok=no
+fi
+
+
 
 # Add the threads support libraries
 LIBS="$LIBS$THREADS_LIBS"
@@ -4432,6 +4512,7 @@ $as_echo "#define STATIC_BUILD 1" >>confdefs.h
     fi
 
 
+
 #--------------------------------------------------------------------
 # Look for a native installed tclsh binary (if available)
 # If one cannot be found then use the binary we build (fails for
@@ -10048,6 +10129,171 @@ fi
 $as_echo "$tcl_ok" >&6; }
 
 #--------------------------------------------------------------------
+#	Zipfs support - Tip 430
+#--------------------------------------------------------------------
+# Check whether --enable-zipfs was given.
+if test "${enable_zipfs+set}" = set; then :
+  enableval=$enable_zipfs; tcl_ok=$enableval
+else
+  tcl_ok=yes
+fi
+
+if test "$tcl_ok" = "yes" ; then
+    #
+    # Find a native compiler
+    #
+    # Put a plausible default for CC_FOR_BUILD in Makefile.
+    if test -z "$CC_FOR_BUILD"; then
+      if test "x$cross_compiling" = "xno"; then
+        CC_FOR_BUILD='$(CC)'
+      else
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcc" >&5
+$as_echo_n "checking for gcc... " >&6; }
+        if ${ac_cv_path_cc+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+            search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+            for dir in $search_path ; do
+                for j in `ls -r $dir/gcc 2> /dev/null` \
+                        `ls -r $dir/gcc 2> /dev/null` ; do
+                    if test x"$ac_cv_path_cc" = x ; then
+                        if test -f "$j" ; then
+                            ac_cv_path_cc=$j
+                            break
+                        fi
+                    fi
+                done
+            done
+
+fi
+
+      fi
+    fi
+
+    # Also set EXEEXT_FOR_BUILD.
+    if test "x$cross_compiling" = "xno"; then
+      EXEEXT_FOR_BUILD='$(EXEEXT)'
+      OBJEXT_FOR_BUILD='$(OBJEXT)'
+    else
+      OBJEXT_FOR_BUILD='.no'
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for build system executable suffix" >&5
+$as_echo_n "checking for build system executable suffix... " >&6; }
+if ${bfd_cv_build_exeext+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  rm -f conftest*
+         echo 'int main () { return 0; }' > conftest.c
+         bfd_cv_build_exeext=
+         ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
+         for file in conftest.*; do
+           case $file in
+           *.c | *.o | *.obj | *.ilk | *.pdb) ;;
+           *) bfd_cv_build_exeext=`echo $file | sed -e s/conftest//` ;;
+           esac
+         done
+         rm -f conftest*
+         test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $bfd_cv_build_exeext" >&5
+$as_echo "$bfd_cv_build_exeext" >&6; }
+      EXEEXT_FOR_BUILD=""
+      test x"${bfd_cv_build_exeext}" != xno && EXEEXT_FOR_BUILD=${bfd_cv_build_exeext}
+    fi
+
+    #
+    # Find a native zip implementation
+    #
+
+    ZIP_PROG=""
+    ZIP_PROG_OPTIONS=""
+    ZIP_PROG_VFSSEARCH=""
+    ZIP_INSTALL_OBJS=""
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for zip" >&5
+$as_echo_n "checking for zip... " >&6; }
+    if ${ac_cv_path_zip+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+    for dir in $search_path ; do
+        for j in `ls -r $dir/zip 2> /dev/null` \
+            `ls -r $dir/zip 2> /dev/null` ; do
+        if test x"$ac_cv_path_zip" = x ; then
+            if test -f "$j" ; then
+            ac_cv_path_zip=$j
+            break
+            fi
+        fi
+        done
+    done
+
+fi
+
+    if test -f "$ac_cv_path_zip" ; then
+        ZIP_PROG="$ac_cv_path_zip "
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ZIP_PROG" >&5
+$as_echo "$ZIP_PROG" >&6; }
+        ZIP_PROG_OPTIONS="-rq"
+        ZIP_PROG_VFSSEARCH="."
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: Found INFO Zip in environment" >&5
+$as_echo "Found INFO Zip in environment" >&6; }
+        # Use standard arguments for zip
+    else
+        # It is not an error if an installed version of Zip can't be located.
+        # We can use the locally distributed minizip instead
+        ZIP_PROG="../minizip${EXEEXT_FOR_BUILD}"
+        ZIP_PROG_OPTIONS="-o -r"
+        ZIP_PROG_VFSSEARCH="."
+        ZIP_INSTALL_OBJS="minizip${EXEEXT_FOR_BUILD}"
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: No zip found on PATH. Building minizip" >&5
+$as_echo "No zip found on PATH. Building minizip" >&6; }
+    fi
+
+
+
+
+
+	ZIPFS_BUILD=1
+	TCL_ZIP_FILE=libtcl_${TCL_MAJOR_VERSION}_${TCL_MINOR_VERSION}_${TCL_PATCH_LEVEL}.zip
+else
+	ZIPFS_BUILD=0
+	TCL_ZIP_FILE=
+fi
+# Do checking message here to not mess up interleaved configure output
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for building with zipfs" >&5
+$as_echo_n "checking for building with zipfs... " >&6; }
+if test "${ZIPFS_BUILD}" = 1; then
+    if test "${SHARED_BUILD}" = 0; then
+       ZIPFS_BUILD=2;
+
+$as_echo "#define ZIPFS_BUILD 2" >>confdefs.h
+
+       INSTALL_LIBRARIES=install-libraries-zipfs-static
+       { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+     else
+
+$as_echo "#define ZIPFS_BUILD 1" >>confdefs.h
+\
+       INSTALL_LIBRARIES=install-libraries-zipfs-shared
+       { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    fi
+else
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+INSTALL_LIBRARIES=install-libraries
+INSTALL_MSGS=install-msgs
+fi
+
+
+
+
+
+
+#--------------------------------------------------------------------
 # The check below checks whether the cpuid instruction is usable.
 #--------------------------------------------------------------------
 
@@ -10333,6 +10579,7 @@ TCL_SHARED_BUILD=${SHARED_BUILD}
 
 
 
+
 ac_config_files="$ac_config_files Makefile:../unix/Makefile.in dltest/Makefile:../unix/dltest/Makefile.in tclConfig.sh:../unix/tclConfig.sh.in tcl.pc:../unix/tcl.pc.in"
 
 cat >confcache <<\_ACEOF
diff --git a/unix/configure.ac b/unix/configure.ac
index 609312b..bd8ea97 100644
--- a/unix/configure.ac
+++ b/unix/configure.ac
@@ -86,6 +86,7 @@ fi
 AC_PROG_CC
 AC_C_INLINE
 
+
 #--------------------------------------------------------------------
 # Supply substitutes for missing POSIX header files.  Special notes:
 #	- stdlib.h doesn't define strtol, strtoul, or
@@ -782,6 +783,52 @@ fi
 AC_MSG_RESULT([$tcl_ok])
 
 #--------------------------------------------------------------------
+#	Zipfs support - Tip 430
+#--------------------------------------------------------------------
+AC_ARG_ENABLE(zipfs,
+    AC_HELP_STRING([--enable-zipfs],
+	[build with Zipfs support (default: on)]),
+    [tcl_ok=$enableval], [tcl_ok=yes])
+if test "$tcl_ok" = "yes" ; then
+    #
+    # Find a native compiler
+    #
+    AX_CC_FOR_BUILD
+    #
+    # Find a native zip implementation
+    #
+    SC_ZIPFS_SUPPORT
+	ZIPFS_BUILD=1
+	TCL_ZIP_FILE=libtcl_${TCL_MAJOR_VERSION}_${TCL_MINOR_VERSION}_${TCL_PATCH_LEVEL}.zip
+else
+	ZIPFS_BUILD=0
+	TCL_ZIP_FILE=
+fi
+# Do checking message here to not mess up interleaved configure output
+AC_MSG_CHECKING([for building with zipfs])
+if test "${ZIPFS_BUILD}" = 1; then
+    if test "${SHARED_BUILD}" = 0; then
+       ZIPFS_BUILD=2;
+       AC_DEFINE(ZIPFS_BUILD, 2, [Are we building with zipfs enabled?])
+       INSTALL_LIBRARIES=install-libraries-zipfs-static
+       AC_MSG_RESULT([yes])
+     else
+       AC_DEFINE(ZIPFS_BUILD, 1, [Are we building with zipfs enabled?])\
+       INSTALL_LIBRARIES=install-libraries-zipfs-shared
+       AC_MSG_RESULT([yes])
+    fi
+else
+AC_MSG_RESULT([no])
+INSTALL_LIBRARIES=install-libraries
+INSTALL_MSGS=install-msgs
+fi
+AC_SUBST(ZIPFS_BUILD)
+AC_SUBST(TCL_ZIP_FILE)
+AC_SUBST(INSTALL_LIBRARIES)
+AC_SUBST(INSTALL_MSGS)
+
+
+#--------------------------------------------------------------------
 # The check below checks whether the cpuid instruction is usable.
 #--------------------------------------------------------------------
 
@@ -951,6 +998,7 @@ AC_SUBST(TCL_PATCH_LEVEL)
 AC_SUBST(TCL_YEAR)
 AC_SUBST(PKG_CFG_ARGS)
 
+AC_SUBST(TCL_ZIP_FILE)
 AC_SUBST(TCL_LIB_FILE)
 AC_SUBST(TCL_LIB_FLAG)
 AC_SUBST(TCL_LIB_SPEC)
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index cd64093..b77387a 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -547,6 +547,7 @@ AC_DEFUN([SC_ENABLE_SHARED], [
 	SHARED_BUILD=0
 	AC_DEFINE(STATIC_BUILD, 1, [Is this a static build?])
     fi
+    AC_SUBST(SHARED_BUILD)
 ])
 
 #------------------------------------------------------------------------
@@ -2355,6 +2356,9 @@ AC_DEFUN([SC_TCL_LINK_LIBS], [
     LIBS="$LIBS $THREADS_LIBS"
     AC_CHECK_FUNCS(pthread_attr_setstacksize pthread_atfork)
     LIBS=$ac_saved_libs
+
+    # TIP #509
+    AC_CHECK_DECLS([PTHREAD_MUTEX_RECURSIVE],tcl_ok=yes,tcl_ok=no, [[#include <pthread.h>]])
 ])
 
 #--------------------------------------------------------------------
@@ -2958,6 +2962,129 @@ if test "x$NEED_FAKE_RFC2553" = "x1"; then
    AC_CHECK_FUNC(strlcpy)
 fi
 ])
+
+#------------------------------------------------------------------------
+# SC_CC_FOR_BUILD
+#	For cross compiles, locate a C compiler that can generate native binaries.
+#
+# Arguments:
+#	none
+#
+# Results:
+#	Substitutes the following vars:
+#		CC_FOR_BUILD
+#		EXEEXT_FOR_BUILD
+#------------------------------------------------------------------------
+
+dnl Get a default for CC_FOR_BUILD to put into Makefile.
+AC_DEFUN([AX_CC_FOR_BUILD],[# Put a plausible default for CC_FOR_BUILD in Makefile.
+    if test -z "$CC_FOR_BUILD"; then
+      if test "x$cross_compiling" = "xno"; then
+        CC_FOR_BUILD='$(CC)'
+      else
+        AC_MSG_CHECKING([for gcc])
+        AC_CACHE_VAL(ac_cv_path_cc, [
+            search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+            for dir in $search_path ; do
+                for j in `ls -r $dir/gcc 2> /dev/null` \
+                        `ls -r $dir/gcc 2> /dev/null` ; do
+                    if test x"$ac_cv_path_cc" = x ; then
+                        if test -f "$j" ; then
+                            ac_cv_path_cc=$j
+                            break
+                        fi
+                    fi
+                done
+            done
+        ])
+      fi
+    fi
+    AC_SUBST(CC_FOR_BUILD)
+    # Also set EXEEXT_FOR_BUILD.
+    if test "x$cross_compiling" = "xno"; then
+      EXEEXT_FOR_BUILD='$(EXEEXT)'
+      OBJEXT_FOR_BUILD='$(OBJEXT)'
+    else
+      OBJEXT_FOR_BUILD='.no'
+      AC_CACHE_CHECK([for build system executable suffix], bfd_cv_build_exeext,
+        [rm -f conftest*
+         echo 'int main () { return 0; }' > conftest.c
+         bfd_cv_build_exeext=
+         ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
+         for file in conftest.*; do
+           case $file in
+           *.c | *.o | *.obj | *.ilk | *.pdb) ;;
+           *) bfd_cv_build_exeext=`echo $file | sed -e s/conftest//` ;;
+           esac
+         done
+         rm -f conftest*
+         test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no])
+      EXEEXT_FOR_BUILD=""
+      test x"${bfd_cv_build_exeext}" != xno && EXEEXT_FOR_BUILD=${bfd_cv_build_exeext}
+    fi
+    AC_SUBST(EXEEXT_FOR_BUILD)])dnl
+    AC_SUBST(OBJEXT_FOR_BUILD)])dnl
+])
+
+
+#------------------------------------------------------------------------
+# SC_ZIPFS_SUPPORT
+#	Locate a zip encoder installed on the system path, or none.
+#
+# Arguments:
+#	none
+#
+# Results:
+#	Substitutes the following vars:
+#		ZIP_PROG
+#       ZIP_PROG_OPTIONS
+#       ZIP_PROG_VFSSEARCH
+#       ZIP_INSTALL_OBJS
+#------------------------------------------------------------------------
+
+AC_DEFUN([SC_ZIPFS_SUPPORT], [
+    ZIP_PROG=""
+    ZIP_PROG_OPTIONS=""
+    ZIP_PROG_VFSSEARCH=""
+    ZIP_INSTALL_OBJS=""
+
+    AC_MSG_CHECKING([for zip])
+    AC_CACHE_VAL(ac_cv_path_zip, [
+    search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+    for dir in $search_path ; do
+        for j in `ls -r $dir/zip 2> /dev/null` \
+            `ls -r $dir/zip 2> /dev/null` ; do
+        if test x"$ac_cv_path_zip" = x ; then
+            if test -f "$j" ; then
+            ac_cv_path_zip=$j
+            break
+            fi
+        fi
+        done
+    done
+    ])
+    if test -f "$ac_cv_path_zip" ; then
+        ZIP_PROG="$ac_cv_path_zip "
+        AC_MSG_RESULT([$ZIP_PROG])
+        ZIP_PROG_OPTIONS="-rq"
+        ZIP_PROG_VFSSEARCH="."
+        AC_MSG_RESULT([Found INFO Zip in environment])
+        # Use standard arguments for zip
+    else
+        # It is not an error if an installed version of Zip can't be located.
+        # We can use the locally distributed minizip instead
+        ZIP_PROG="../minizip${EXEEXT_FOR_BUILD}"
+        ZIP_PROG_OPTIONS="-o -r"
+        ZIP_PROG_VFSSEARCH="."
+        ZIP_INSTALL_OBJS="minizip${EXEEXT_FOR_BUILD}"
+        AC_MSG_RESULT([No zip found on PATH. Building minizip])
+    fi
+    AC_SUBST(ZIP_PROG)
+    AC_SUBST(ZIP_PROG_OPTIONS)
+    AC_SUBST(ZIP_PROG_VFSSEARCH)
+    AC_SUBST(ZIP_INSTALL_OBJS)
+])
+
 # Local Variables:
 # mode: autoconf
 # End:
diff --git a/unix/tcl.pc.in b/unix/tcl.pc.in
index 846cb11..ca932d2 100644
--- a/unix/tcl.pc.in
+++ b/unix/tcl.pc.in
@@ -4,6 +4,8 @@ prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
 includedir=@includedir@
+libfile=@TCL_LIB_FILE@
+zipfile=@TCL_ZIP_FILE@
 
 Name: Tool Command Language
 Description: Tcl is a powerful, easy-to-learn dynamic programming language, suitable for a wide range of uses.
diff --git a/unix/tclAppInit.c b/unix/tclAppInit.c
index 9bbc88b..3587f35 100644
--- a/unix/tclAppInit.c
+++ b/unix/tclAppInit.c
@@ -79,6 +79,8 @@ main(
 
 #ifdef TCL_LOCAL_MAIN_HOOK
     TCL_LOCAL_MAIN_HOOK(&argc, &argv);
+#else
+    TclZipfs_AppHook(&argc, &argv);
 #endif
 
     Tcl_Main(argc, argv, TCL_LOCAL_APPINIT);
diff --git a/unix/tclConfig.sh.in b/unix/tclConfig.sh.in
index 1edee2f..743b5a5 100644
--- a/unix/tclConfig.sh.in
+++ b/unix/tclConfig.sh.in
@@ -39,6 +39,9 @@ TCL_SHARED_BUILD=@TCL_SHARED_BUILD@
 # The name of the Tcl library (may be either a .a file or a shared library):
 TCL_LIB_FILE='@TCL_LIB_FILE@'
 
+# The name of a zip containing the /library and /encodings (may be either a .zip file or a shared library):
+TCL_ZIP_FILE='@TCL_ZIP_FILE@'
+
 # Additional libraries to use when linking Tcl.
 TCL_LIBS='@TCL_LIBS@'
 
diff --git a/unix/tclUnixChan.c b/unix/tclUnixChan.c
index ced684a..435579a 100644
--- a/unix/tclUnixChan.c
+++ b/unix/tclUnixChan.c
@@ -383,7 +383,7 @@ FileSeekProc(
      */
 
     oldLoc = TclOSseek(fsPtr->fd, (Tcl_SeekOffset) 0, SEEK_CUR);
-    if (oldLoc == Tcl_LongAsWide(-1)) {
+    if (oldLoc == -1) {
 	/*
 	 * Bad things are happening. Error out...
 	 */
@@ -398,14 +398,14 @@ FileSeekProc(
      * Check for expressability in our return type, and roll-back otherwise.
      */
 
-    if (newLoc > Tcl_LongAsWide(INT_MAX)) {
+    if (newLoc > INT_MAX) {
 	*errorCodePtr = EOVERFLOW;
 	TclOSseek(fsPtr->fd, (Tcl_SeekOffset) oldLoc, SEEK_SET);
 	return -1;
     } else {
-	*errorCodePtr = (newLoc == Tcl_LongAsWide(-1)) ? errno : 0;
+	*errorCodePtr = (newLoc == -1) ? errno : 0;
     }
-    return (int) Tcl_WideAsLong(newLoc);
+    return (int) newLoc;
 }
 
 /*
diff --git a/unix/tclUnixThrd.c b/unix/tclUnixThrd.c
index 0ab3016..60340b0 100644
--- a/unix/tclUnixThrd.c
+++ b/unix/tclUnixThrd.c
@@ -14,14 +14,159 @@
 #include "tclInt.h"
 
 #if TCL_THREADS
+
+/*
+ * TIP #509. Ensures that Tcl's mutexes are reentrant.
+ *
+ *----------------------------------------------------------------------
+ *
+ * PMutexInit --
+ *
+ *	Sets up the memory pointed to by its argument so that it contains the
+ *	implementation of a recursive lock. Caller supplies the space.
+ *
+ *----------------------------------------------------------------------
+ *
+ * PMutexDestroy --
+ *
+ *	Tears down the implementation of a recursive lock (but does not
+ *	deallocate the space holding the lock).
+ *
+ *----------------------------------------------------------------------
+ *
+ * PMutexLock --
+ *
+ *	Locks a recursive lock. (Similar to pthread_mutex_lock)
+ *
+ *----------------------------------------------------------------------
+ *
+ * PMutexUnlock --
+ *
+ *	Unlocks a recursive lock. (Similar to pthread_mutex_unlock)
+ *
+ *----------------------------------------------------------------------
+ *
+ * PCondWait --
+ *
+ *	Waits on a condition variable linked a recursive lock. (Similar to
+ *	pthread_cond_wait)
+ *
+ *----------------------------------------------------------------------
+ *
+ * PCondTimedWait --
+ *
+ *	Waits for a limited amount of time on a condition variable linked to a
+ *	recursive lock. (Similar to pthread_cond_timedwait)
+ *
+ *----------------------------------------------------------------------
+ */
+
+#ifndef HAVE_DECL_PTHREAD_MUTEX_RECURSIVE
+#define HAVE_DECL_PTHREAD_MUTEX_RECURSIVE 0
+#endif
+
+#if HAVE_DECL_PTHREAD_MUTEX_RECURSIVE
+/*
+ * Pthread has native reentrant (AKA recursive) mutexes. Use them for
+ * Tcl_Mutex.
+ */
+
+typedef pthread_mutex_t PMutex;
+
+static void
+PMutexInit(
+    PMutex *pmutexPtr)
+{
+    pthread_mutexattr_t attr;
 
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+    pthread_mutex_init(pmutexPtr, &attr);
+}
+
+#define PMutexDestroy	pthread_mutex_destroy
+#define PMutexLock	pthread_mutex_lock
+#define PMutexUnlock	pthread_mutex_unlock
+#define PCondWait	pthread_cond_wait
+#define PCondTimedWait	pthread_cond_timedwait
+
+#else /* !HAVE_PTHREAD_MUTEX_RECURSIVE */
+
+/*
+ * No native support for reentrant mutexes. Emulate them with regular mutexes
+ * and thread-local counters.
+ */
+
+typedef struct PMutex {
+    pthread_mutex_t mutex;
+    pthread_t thread;
+    int counter;
+} PMutex;
+
+static void
+PMutexInit(
+    PMutex *pmutexPtr)
+{
+    pthread_mutex_init(&pmutexPtr->mutex, NULL);
+    pmutexPtr->thread = 0;
+    pmutexPtr->counter = 0;
+}
+
+static void
+PMutexDestroy(
+    PMutex *pmutexPtr)
+{
+    pthread_mutex_destroy(&pmutexPtr->mutex);
+}
+
+static void
+PMutexLock(
+    PMutex *pmutexPtr)
+{
+    if (pmutexPtr->thread != pthread_self() || pmutexPtr->counter == 0) {
+	pthread_mutex_lock(&pmutexPtr->mutex);
+	pmutexPtr->thread = pthread_self();
+	pmutexPtr->counter = 0;
+    }
+    pmutexPtr->counter++;
+}
+
+static void
+PMutexUnlock(
+    PMutex *pmutexPtr)
+{
+    pmutexPtr->counter--;
+    if (pmutexPtr->counter == 0) {
+	pmutexPtr->thread = 0;
+	pthread_mutex_unlock(&pmutexPtr->mutex);
+    }
+}
+
+static void
+PCondWait(
+    pthread_cond_t *pcondPtr,
+    PMutex *pmutexPtr)
+{
+    pthread_cond_wait(pcondPtr, &pmutexPtr->mutex);
+}
+
+static void
+PCondTimedWait(
+    pthread_cond_t *pcondPtr,
+    PMutex *pmutexPtr,
+    struct timespec *ptime)
+{
+    pthread_cond_timedwait(pcondPtr, &pmutexPtr->mutex, ptime);
+}
+#endif /* HAVE_PTHREAD_MUTEX_RECURSIVE */
+
 #ifndef TCL_NO_DEPRECATED
 typedef struct {
     char nabuf[16];
 } ThreadSpecificData;
 
 static Tcl_ThreadDataKey dataKey;
-#endif
+#endif /* TCL_NO_DEPRECATED */
 
 /*
  * masterLock is used to serialize creation of mutexes, condition variables,
@@ -43,8 +188,15 @@ static pthread_mutex_t initLock = PTHREAD_MUTEX_INITIALIZER;
  * obvious reasons, cannot use any dyamically allocated storage.
  */
 
-static pthread_mutex_t allocLock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_mutex_t *allocLockPtr = &allocLock;
+static PMutex allocLock;
+static pthread_once_t allocLockInitOnce = PTHREAD_ONCE_INIT;
+
+static void
+allocLockInit(void)
+{
+    PMutexInit(&allocLock);
+}
+static PMutex *allocLockPtr = &allocLock;
 
 #endif /* TCL_THREADS */
 
@@ -109,17 +261,17 @@ TclpThreadCreate(
     }
 #endif /* HAVE_PTHREAD_ATTR_SETSTACKSIZE */
 
-    if (! (flags & TCL_THREAD_JOINABLE)) {
-	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
+    if (!(flags & TCL_THREAD_JOINABLE)) {
+	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
     }
 
     if (pthread_create(&theThread, &attr,
-	    (void * (*)(void *))proc, (void *)clientData) &&
+	    (void * (*)(void *)) proc, (void *) clientData) &&
 	    pthread_create(&theThread, NULL,
-		    (void * (*)(void *))proc, (void *)clientData)) {
+		    (void * (*)(void *)) proc, (void *) clientData)) {
 	result = TCL_ERROR;
     } else {
-	*idPtr = (Tcl_ThreadId)theThread;
+	*idPtr = (Tcl_ThreadId) theThread;
 	result = TCL_OK;
     }
     pthread_attr_destroy(&attr);
@@ -331,7 +483,6 @@ TclpMasterLock(void)
     pthread_mutex_lock(&masterLock);
 #endif
 }
-
 
 /*
  *----------------------------------------------------------------------
@@ -381,7 +532,9 @@ Tcl_Mutex *
 Tcl_GetAllocMutex(void)
 {
 #if TCL_THREADS
-    pthread_mutex_t **allocLockPtrPtr = &allocLockPtr;
+    PMutex **allocLockPtrPtr = &allocLockPtr;
+
+    pthread_once(&allocLockInitOnce, allocLockInit);
     return (Tcl_Mutex *) allocLockPtrPtr;
 #else
     return NULL;
@@ -413,9 +566,9 @@ Tcl_GetAllocMutex(void)
 
 void
 Tcl_MutexLock(
-    Tcl_Mutex *mutexPtr)	/* Really (pthread_mutex_t **) */
+    Tcl_Mutex *mutexPtr)	/* Really (PMutex **) */
 {
-    pthread_mutex_t *pmutexPtr;
+    PMutex *pmutexPtr;
 
     if (*mutexPtr == NULL) {
 	pthread_mutex_lock(&masterLock);
@@ -424,15 +577,15 @@ Tcl_MutexLock(
 	     * Double inside master lock check to avoid a race condition.
 	     */
 
-	    pmutexPtr = ckalloc(sizeof(pthread_mutex_t));
-	    pthread_mutex_init(pmutexPtr, NULL);
-	    *mutexPtr = (Tcl_Mutex)pmutexPtr;
+	    pmutexPtr = ckalloc(sizeof(PMutex));
+	    PMutexInit(pmutexPtr);
+	    *mutexPtr = (Tcl_Mutex) pmutexPtr;
 	    TclRememberMutex(mutexPtr);
 	}
 	pthread_mutex_unlock(&masterLock);
     }
-    pmutexPtr = *((pthread_mutex_t **)mutexPtr);
-    pthread_mutex_lock(pmutexPtr);
+    pmutexPtr = *((PMutex **) mutexPtr);
+    PMutexLock(pmutexPtr);
 }
 
 /*
@@ -454,11 +607,11 @@ Tcl_MutexLock(
 
 void
 Tcl_MutexUnlock(
-    Tcl_Mutex *mutexPtr)	/* Really (pthread_mutex_t **) */
+    Tcl_Mutex *mutexPtr)	/* Really (PMutex **) */
 {
-    pthread_mutex_t *pmutexPtr = *(pthread_mutex_t **) mutexPtr;
+    PMutex *pmutexPtr = *(PMutex **) mutexPtr;
 
-    pthread_mutex_unlock(pmutexPtr);
+    PMutexUnlock(pmutexPtr);
 }
 
 /*
@@ -484,10 +637,10 @@ void
 TclpFinalizeMutex(
     Tcl_Mutex *mutexPtr)
 {
-    pthread_mutex_t *pmutexPtr = *(pthread_mutex_t **) mutexPtr;
+    PMutex *pmutexPtr = *(PMutex **) mutexPtr;
 
     if (pmutexPtr != NULL) {
-	pthread_mutex_destroy(pmutexPtr);
+	PMutexDestroy(pmutexPtr);
 	ckfree(pmutexPtr);
 	*mutexPtr = NULL;
     }
@@ -518,11 +671,11 @@ TclpFinalizeMutex(
 void
 Tcl_ConditionWait(
     Tcl_Condition *condPtr,	/* Really (pthread_cond_t **) */
-    Tcl_Mutex *mutexPtr,	/* Really (pthread_mutex_t **) */
+    Tcl_Mutex *mutexPtr,	/* Really (PMutex **) */
     const Tcl_Time *timePtr) /* Timeout on waiting period */
 {
     pthread_cond_t *pcondPtr;
-    pthread_mutex_t *pmutexPtr;
+    PMutex *pmutexPtr;
     struct timespec ptime;
 
     if (*condPtr == NULL) {
@@ -541,10 +694,10 @@ Tcl_ConditionWait(
 	}
 	pthread_mutex_unlock(&masterLock);
     }
-    pmutexPtr = *((pthread_mutex_t **)mutexPtr);
-    pcondPtr = *((pthread_cond_t **)condPtr);
+    pmutexPtr = *((PMutex **) mutexPtr);
+    pcondPtr = *((pthread_cond_t **) condPtr);
     if (timePtr == NULL) {
-	pthread_cond_wait(pcondPtr, pmutexPtr);
+	PCondWait(pcondPtr, pmutexPtr);
     } else {
 	Tcl_Time now;
 
@@ -557,7 +710,7 @@ Tcl_ConditionWait(
 	ptime.tv_sec = timePtr->sec + now.sec +
 	    (timePtr->usec + now.usec) / 1000000;
 	ptime.tv_nsec = 1000 * ((timePtr->usec + now.usec) % 1000000);
-	pthread_cond_timedwait(pcondPtr, pmutexPtr, &ptime);
+	PCondTimedWait(pcondPtr, pmutexPtr, &ptime);
     }
 }
 
@@ -584,12 +737,13 @@ void
 Tcl_ConditionNotify(
     Tcl_Condition *condPtr)
 {
-    pthread_cond_t *pcondPtr = *((pthread_cond_t **)condPtr);
+    pthread_cond_t *pcondPtr = *((pthread_cond_t **) condPtr);
+
     if (pcondPtr != NULL) {
 	pthread_cond_broadcast(pcondPtr);
     } else {
 	/*
-	 * Noone has used the condition variable, so there are no waiters.
+	 * No-one has used the condition variable, so there are no waiters.
 	 */
     }
 }
@@ -617,7 +771,7 @@ void
 TclpFinalizeCondition(
     Tcl_Condition *condPtr)
 {
-    pthread_cond_t *pcondPtr = *(pthread_cond_t **)condPtr;
+    pthread_cond_t *pcondPtr = *(pthread_cond_t **) condPtr;
 
     if (pcondPtr != NULL) {
 	pthread_cond_destroy(pcondPtr);
@@ -683,22 +837,22 @@ static pthread_key_t key;
 
 typedef struct {
     Tcl_Mutex tlock;
-    pthread_mutex_t plock;
-} allocMutex;
+    PMutex plock;
+} AllocMutex;
 
 Tcl_Mutex *
 TclpNewAllocMutex(void)
 {
-    allocMutex *lockPtr;
-    register pthread_mutex_t *plockPtr;
+    AllocMutex *lockPtr;
+    register PMutex *plockPtr;
 
-    lockPtr = malloc(sizeof(allocMutex));
+    lockPtr = malloc(sizeof(AllocMutex));
     if (lockPtr == NULL) {
 	Tcl_Panic("could not allocate lock");
     }
     plockPtr = &lockPtr->plock;
     lockPtr->tlock = (Tcl_Mutex) plockPtr;
-    pthread_mutex_init(&lockPtr->plock, NULL);
+    PMutexInit(&lockPtr->plock);
     return &lockPtr->tlock;
 }
 
@@ -706,11 +860,12 @@ void
 TclpFreeAllocMutex(
     Tcl_Mutex *mutex)		/* The alloc mutex to free. */
 {
-    allocMutex* lockPtr = (allocMutex*) mutex;
+    AllocMutex *lockPtr = (AllocMutex *) mutex;
+
     if (!lockPtr) {
 	return;
     }
-    pthread_mutex_destroy(&lockPtr->plock);
+    PMutexDestroy(&lockPtr->plock);
     free(lockPtr);
 }
 
@@ -762,7 +917,7 @@ TclpThreadCreateKey(void)
 {
     pthread_key_t *ptkeyPtr;
 
-    ptkeyPtr = TclpSysAlloc(sizeof *ptkeyPtr, 0);
+    ptkeyPtr = TclpSysAlloc(sizeof(pthread_key_t), 0);
     if (NULL == ptkeyPtr) {
 	Tcl_Panic("unable to allocate thread key!");
     }
diff --git a/win/Makefile.in b/win/Makefile.in
index 4e75b06..99cf327 100644
--- a/win/Makefile.in
+++ b/win/Makefile.in
@@ -137,6 +137,11 @@ DDEDOTVER		= @TCL_DDE_MAJOR_VERSION@.@TCL_DDE_MINOR_VERSION@
 REGVER			= @TCL_REG_MAJOR_VERSION@@TCL_REG_MINOR_VERSION@
 REGDOTVER		= @TCL_REG_MAJOR_VERSION@.@TCL_REG_MINOR_VERSION@
 
+TCL_ZIP_FILE		= @TCL_ZIP_FILE@
+TCL_VFS_PATH		= libtcl.vfs/tcl_library
+TCL_VFS_ROOT		= libtcl.vfs
+
+
 TCL_STUB_LIB_FILE	= @TCL_STUB_LIB_FILE@
 TCL_DLL_FILE		= @TCL_DLL_FILE@
 TCL_LIB_FILE		= @TCL_LIB_FILE@
@@ -152,6 +157,7 @@ SHARED_LIBRARIES 	= $(TCL_DLL_FILE) @ZLIB_DLL_FILE@
 STATIC_LIBRARIES	= $(TCL_LIB_FILE)
 
 TCLSH			= tclsh$(VER)${EXESUFFIX}
+WINE			= @WINE@
 CAT32			= cat32$(EXEEXT)
 MAN2TCL			= man2tcl$(EXEEXT)
 
@@ -196,6 +202,45 @@ SHELL		= @SHELL@
 RM		= rm -f
 COPY		= cp
 
+###
+# Tip 430 - ZipFS Modifications
+###
+
+TCL_ZIP_FILE		= @TCL_ZIP_FILE@
+TCL_VFS_PATH		= libtcl.vfs/tcl_library
+TCL_VFS_ROOT		= libtcl.vfs
+
+HOST_CC		        = @CC_FOR_BUILD@
+HOST_EXEEXT             = @EXEEXT_FOR_BUILD@
+HOST_OBJEXT             = @OBJEXT_FOR_BUILD@
+ZIPFS_BUILD	        = @ZIPFS_BUILD@
+NATIVE_ZIP		= @ZIP_PROG@
+ZIP_PROG_OPTIONS		= @ZIP_PROG_OPTIONS@
+ZIP_PROG_VFSSEARCH  = @ZIP_PROG_VFSSEARCH@
+SHARED_BUILD		= @SHARED_BUILD@
+INSTALL_MSGS            = @INSTALL_MSGS@
+INSTALL_LIBRARIES       = @INSTALL_LIBRARIES@
+
+# Minizip
+MINIZIP_OBJS = \
+        adler32.$(HOST_OBJEXT) \
+        compress.$(HOST_OBJEXT) \
+        crc32.$(HOST_OBJEXT) \
+        deflate.$(HOST_OBJEXT) \
+        infback.$(HOST_OBJEXT) \
+        inffast.$(HOST_OBJEXT) \
+        inflate.$(HOST_OBJEXT) \
+        inftrees.$(HOST_OBJEXT) \
+        ioapi.$(HOST_OBJEXT) \
+        iowin32.$(HOST_OBJEXT)  \
+        trees.$(HOST_OBJEXT) \
+        uncompr.$(HOST_OBJEXT) \
+        zip.$(HOST_OBJEXT) \
+        zutil.$(HOST_OBJEXT) \
+        minizip.$(HOST_OBJEXT)
+
+ZIP_INSTALL_OBJS =  @ZIP_INSTALL_OBJS@
+
 CC_SWITCHES = ${CFLAGS} ${CFLAGS_WARNING} ${TCL_SHLIB_CFLAGS} \
 -I"${ZLIB_DIR_NATIVE}" -I"${GENERIC_DIR_NATIVE}" \
 -DMP_PREC=4 -I"${TOMMATH_DIR_NATIVE}" -I"${WIN_DIR_NATIVE}" \
@@ -303,6 +348,7 @@ GENERIC_OBJS = \
 	tclUtf.$(OBJEXT) \
 	tclUtil.$(OBJEXT) \
 	tclVar.$(OBJEXT) \
+	tclZipfs.$(OBJEXT) \
 	tclZlib.$(OBJEXT)
 
 TOMMATH_OBJS = \
@@ -427,7 +473,7 @@ all: binaries libraries doc packages
 
 tcltest: $(TCLSH) $(TEST_DLL_FILE)
 
-binaries: $(TCL_STUB_LIB_FILE) @LIBRARIES@ winextensions $(TCLSH)
+binaries: $(TCL_STUB_LIB_FILE) @LIBRARIES@ winextensions ${TCL_ZIP_FILE} $(TCLSH)
 
 winextensions: ${DDE_DLL_FILE} ${REG_DLL_FILE}
 
@@ -435,9 +481,19 @@ libraries:
 
 doc:
 
+tclzipfile: ${TCL_ZIP_FILE}
+
+${TCL_ZIP_FILE}:  ${ZIP_INSTALL_OBJS} ${DDE_DLL_FILE} ${REG_DLL_FILE}
+	rm -rf ${TCL_VFS_ROOT}
+	mkdir -p ${TCL_VFS_PATH}
+	$(COPY) -a $(TOP_DIR)/library/* ${TCL_VFS_PATH}
+	$(COPY) ${DDE_DLL_FILE} ${TCL_VFS_PATH}/dde
+	$(COPY) ${REG_DLL_FILE} ${TCL_VFS_PATH}/reg
+	cd  ${TCL_VFS_ROOT} ; ${NATIVE_ZIP} ${ZIP_PROG_OPTIONS} ../${TCL_ZIP_FILE} ${ZIP_PROG_VFSSEARCH}
+
 $(TCLSH): $(TCLSH_OBJS) @LIBRARIES@ $(TCL_STUB_LIB_FILE) tclsh.$(RES)
 	$(CC) $(CFLAGS) $(TCLSH_OBJS) $(TCL_LIB_FILE) $(TCL_STUB_LIB_FILE) $(LIBS) \
-        tclsh.$(RES) $(CC_EXENAME) $(LDFLAGS_CONSOLE)
+	tclsh.$(RES) $(CC_EXENAME) $(LDFLAGS_CONSOLE)
 	@VC_MANIFEST_EMBED_EXE@
 
 cat32.$(OBJEXT): cat.c
@@ -454,10 +510,14 @@ ${TCL_STUB_LIB_FILE}: ${STUB_OBJS}
 	@MAKE_STUB_LIB@ ${STUB_OBJS}
 	@POST_MAKE_LIB@
 
-${TCL_DLL_FILE}: ${TCL_OBJS} tcl.$(RES) @ZLIB_DLL_FILE@
+${TCL_DLL_FILE}: ${TCL_OBJS} tcl.$(RES) @ZLIB_DLL_FILE@ ${TCL_ZIP_FILE}
 	@$(RM) ${TCL_DLL_FILE} $(TCL_LIB_FILE)
 	@MAKE_DLL@ ${TCL_OBJS} tcl.$(RES) $(SHLIB_LD_LIBS)
 	@VC_MANIFEST_EMBED_DLL@
+ifeq (${ZIPFS_BUILD},1)
+	cat ${TCL_ZIP_FILE} >> ${TCL_DLL_FILE}
+	${NATIVE_ZIP} -A ${TCL_DLL_FILE}
+endif
 
 ${TCL_LIB_FILE}: ${TCL_OBJS} ${DDE_OBJS} ${REG_OBJS}
 	@$(RM) ${TCL_LIB_FILE}
@@ -503,6 +563,17 @@ testMain.${OBJEXT}: tclAppInit.c
 tclMain2.${OBJEXT}: tclMain.c
 	$(CC) -c $(CC_SWITCHES) -DBUILD_tcl -DTCL_ASCII_MAIN @DEPARG@ $(CC_OBJNAME)
 
+# TIP #430, ZipFS Support
+tclZipfs.${OBJEXT}: $(GENERIC_DIR)/tclZipfs.c
+	$(CC) -c $(CC_SWITCHES) -DBUILD_tcl \
+	-DCFG_RUNTIME_PATH=\"$(bindir_native)\" \
+	-DCFG_RUNTIME_DLLFILE="\"$(TCL_DLL_FILE)\"" \
+	-DCFG_RUNTIME_ZIPFILE="\"$(TCL_ZIP_FILE)\"" \
+	-DCFG_RUNTIME_LIBDIR="\"$(bindir_native)\"" \
+	-DCFG_RUNTIME_SCRDIR="\"$(TCL_LIBRARY_NATIVE)\"" \
+	$(ZLIB_INCLUDE) -I$(ZLIB_DIR)/contrib/minizip  @DEPARG@ $(CC_OBJNAME)
+
+
 # TIP #59, embedding of configuration information into the binary library.
 #
 # Part of Tcl's configuration information are the paths where it was installed
@@ -524,6 +595,8 @@ tclPkgConfig.${OBJEXT}: tclPkgConfig.c
 		-DCFG_RUNTIME_SCRDIR=\"$(TCL_LIBRARY_NATIVE)\" \
 		-DCFG_RUNTIME_INCDIR=\"$(includedir_native)\" \
 		-DCFG_RUNTIME_DOCDIR=\"$(mandir_native)\" \
+		-DCFG_RUNTIME_DLLFILE="\"$(TCL_DLL_FILE)\"" \
+		-DCFG_RUNTIME_ZIPFILE="\"$(TCL_ZIP_FILE)\"" \
 		-DBUILD_tcl \
 		@DEPARG@ $(CC_OBJNAME)
 
@@ -550,6 +623,59 @@ tclWinPanic.${OBJEXT}: tclWinPanic.c
 .rc.$(RES):
 	$(RC) @RC_OUT@ $@ @RC_TYPE@ @RC_DEFINES@ @RC_INCLUDE@ "$(GENERIC_DIR_NATIVE)" @RC_INCLUDE@ "$(WIN_DIR_NATIVE)" @DEPARG@
 
+
+
+#--------------------------------------------------------------------------
+# Minizip implementation
+#--------------------------------------------------------------------------
+adler32.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/adler32.c
+
+compress.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/compress.c
+
+crc32.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/crc32.c
+
+deflate.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/deflate.c
+
+ioapi.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -DIOAPI_NO_64 -I$(ZLIB_DIR) -I$(ZLIB_DIR)/contrib/minizip -c $(ZLIB_DIR)/contrib/minizip/ioapi.c
+
+iowin32.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -I$(ZLIB_DIR)/contrib/minizip -c $(ZLIB_DIR)/contrib/minizip/iowin32.c
+
+infback.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/infback.c
+
+inffast.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/inffast.c
+
+inflate.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/inflate.c
+
+inftrees.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/inftrees.c
+
+trees.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/trees.c
+
+uncompr.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/uncompr.c
+
+zip.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -I$(ZLIB_DIR)/contrib/minizip -c $(ZLIB_DIR)/contrib/minizip/zip.c
+
+zutil.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -c $(ZLIB_DIR)/zutil.c
+
+minizip.$(HOST_OBJEXT):
+	$(HOST_CC) -o $@ -I$(ZLIB_DIR) -DIOAPI_NO_64 -I$(ZLIB_DIR)/contrib/minizip -c $(ZLIB_DIR)/contrib/minizip/minizip.c
+
+minizip${HOST_EXEEXT}: $(MINIZIP_OBJS)
+	$(HOST_CC) -o $@ $(MINIZIP_OBJS)
+
 # The following target generates the file generic/tclDate.c from the yacc
 # grammar found in generic/tclGetDate.y. This is only run by hand as yacc is
 # not available in all environments. The name of the .c file is different than
@@ -570,7 +696,15 @@ gentommath_h:
 		"$(TOMMATH_DIR_NATIVE)/tommath.h" \
 		> "$(GENERIC_DIR_NATIVE)/tclTomMath.h"
 
-install: all install-binaries install-libraries install-doc install-packages
+INSTALL_BASE_TARGETS = install-binaries $(INSTALL_LIBRARIES) $(INSTALL_MSGS) $(INSTALL_TZDATA)
+INSTALL_DOC_TARGETS = install-doc
+INSTALL_PACKAGE_TARGETS = install-packages
+INSTALL_DEV_TARGETS = install-headers
+INSTALL_EXTRA_TARGETS =
+INSTALL_TARGETS = $(INSTALL_BASE_TARGETS) $(INSTALL_DOC_TARGETS) $(INSTALL_DEV_TARGETS) \
+		  $(INSTALL_PACKAGE_TARGETS) $(INSTALL_EXTRA_TARGETS)
+
+install: $(INSTALL_TARGETS)
 
 install-binaries: binaries
 	@for i in "$(LIB_INSTALL_DIR)" "$(BIN_INSTALL_DIR)" ; \
@@ -625,6 +759,11 @@ install-binaries: binaries
 	    $(COPY) $(REG_LIB_FILE) $(LIB_INSTALL_DIR)/reg${REGDOTVER}; \
 	    fi
 
+install-libraries-zipfs-shared: libraries
+
+install-libraries-zipfs-static: install-libraries-zipfs-shared
+	$(INSTALL_DATA) ${TCL_ZIP_FILE} "$(LIB_INSTALL_DIR)"
+
 install-libraries: libraries install-tzdata install-msgs
 	@for i in "$$($(CYGPATH) $(prefix)/lib)" "$(INCLUDE_INSTALL_DIR)" \
 		$(SCRIPT_INSTALL_DIR); \
@@ -643,22 +782,13 @@ install-libraries: libraries install-tzdata install-msgs
 		else true; \
 		fi; \
 	    done;
-	@echo "Installing header files";
-	@for i in "$(GENERIC_DIR)/tcl.h" "$(GENERIC_DIR)/tclDecls.h" \
-		"$(GENERIC_DIR)/tclOO.h" "$(GENERIC_DIR)/tclOODecls.h" \
-		"$(GENERIC_DIR)/tclPlatDecls.h" \
-		"$(GENERIC_DIR)/tclTomMath.h" \
-		"$(GENERIC_DIR)/tclTomMathDecls.h"; \
-	    do \
-	    $(COPY) "$$i" "$(INCLUDE_INSTALL_DIR)"; \
-	    done;
 	@echo "Installing library files to $(SCRIPT_INSTALL_DIR)";
 	@for i in $(ROOT_DIR)/library/*.tcl $(ROOT_DIR)/library/tclIndex; \
 	    do \
 	    $(COPY) "$$i" "$(SCRIPT_INSTALL_DIR)"; \
 	    done;
-	@echo "Installing package http 2.8.13 as a Tcl Module";
-	@$(COPY) $(ROOT_DIR)/library/http/http.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.6/http-2.8.13.tm;
+	@echo "Installing package http 2.9.0 as a Tcl Module";
+	@$(COPY) $(ROOT_DIR)/library/http/http.tcl $(SCRIPT_INSTALL_DIR)/../tcl8/8.6/http-2.9.0.tm;
 	@echo "Installing library opt0.4 directory";
 	@for j in $(ROOT_DIR)/library/opt/*.tcl; \
 	    do \
@@ -689,6 +819,25 @@ install-msgs:
 
 install-doc: doc
 
+install-headers:
+	@for i in "$(INCLUDE_INSTALL_DIR)"; \
+	    do \
+	    if [ ! -d "$$i" ] ; then \
+		echo "Making directory $$i"; \
+		$(INSTALL_DATA_DIR) "$$i"; \
+		else true; \
+		fi; \
+	    done;
+	@echo "Installing header files to $(INCLUDE_INSTALL_DIR)/";
+	@for i in $(GENERIC_DIR)/tcl.h $(GENERIC_DIR)/tclDecls.h \
+		$(GENERIC_DIR)/tclOO.h $(GENERIC_DIR)/tclOODecls.h \
+		$(GENERIC_DIR)/tclPlatDecls.h \
+		$(GENERIC_DIR)/tclTomMath.h \
+		$(GENERIC_DIR)/tclTomMathDecls.h ; \
+	    do \
+	    $(COPY) $$i "$(INCLUDE_INSTALL_DIR)"; \
+	    done;
+
 # Optional target to install private headers
 install-private-headers: libraries
 	@for i in $(PRIVATE_INCLUDE_INSTALL_DIR); \
@@ -716,15 +865,17 @@ test: test-tcl test-packages
 
 test-tcl: binaries $(TCLSH) $(CAT32) $(TEST_DLL_FILE)
 	TCL_LIBRARY="$(LIBRARY_DIR)"; export TCL_LIBRARY; \
-	./$(TCLSH) "$(ROOT_DIR_NATIVE)/tests/all.tcl" $(TESTFLAGS) \
+	$(WINE) ./$(TCLSH) "$(ROOT_DIR_NATIVE)/tests/all.tcl" $(TESTFLAGS) \
 	-load "package ifneeded Tcltest ${VERSION}@TCL_PATCH_LEVEL@ [list load [file normalize ${TEST_DLL_FILE}] Tcltest]; \
+	package ifneeded tcltests 0.1 \"[list source [file normalize $(ROOT_DIR_NATIVE)/tests/tcltests.tcl]];package provide tcltests 0.1\"; \
 	package ifneeded dde 1.4.0 [list load [file normalize ${DDE_DLL_FILE}] dde]; \
-	package ifneeded registry 1.3.2 [list load [file normalize ${REG_DLL_FILE}] registry]" | ./$(CAT32)
+	package ifneeded registry 1.3.2 [list load [file normalize ${REG_DLL_FILE}] registry]" | $(WINE) ./$(CAT32)
 
 # Useful target to launch a built tclsh with the proper path,...
 runtest: binaries $(TCLSH) $(TEST_DLL_FILE)
 	@TCL_LIBRARY="$(LIBRARY_DIR)"; export TCL_LIBRARY; \
-	./$(TCLSH) $(TESTFLAGS) -load "package ifneeded Tcltest ${VERSION}@TCL_PATCH_LEVEL@ [list load [file normalize ${TEST_DLL_FILE}] Tcltest]; \
+	$(WINE) ./$(TCLSH) $(TESTFLAGS) -load "package ifneeded Tcltest ${VERSION}@TCL_PATCH_LEVEL@ [list load [file normalize ${TEST_DLL_FILE}] Tcltest]; \
+	package ifneeded tcltests 0.1 \"[list source [file normalize $(ROOT_DIR_NATIVE)/tests/tcltests.tcl]];package provide tcltests 0.1\"; \
 	package ifneeded dde 1.4.0 [list load [file normalize ${DDE_DLL_FILE}] dde]; \
 	package ifneeded registry 1.3.2 [list load [file normalize ${REG_DLL_FILE}] registry]" $(SCRIPT)
 
@@ -732,7 +883,7 @@ runtest: binaries $(TCLSH) $(TEST_DLL_FILE)
 # `make shell SCRIPT=foo.tcl`
 shell: binaries
 	@TCL_LIBRARY="$(LIBRARY_DIR)"; export TCL_LIBRARY; \
-	./$(TCLSH) $(SCRIPT)
+	$(WINE) ./$(TCLSH) $(SCRIPT)
 
 # This target can be used to run tclsh inside either gdb or insight
 gdb: binaries
@@ -752,10 +903,13 @@ clean: cleanhelp clean-packages
 	$(RM) *.lib *.a *.exp *.dll *.$(RES) *.${OBJEXT} *~ \#* TAGS a.out
 	$(RM) $(TCLSH) $(CAT32)
 	$(RM) *.pch *.ilk *.pdb
+	$(RM) minizip${HOST_EXEEXT} *.${HOST_OBJEXT}
+	$(RM) *.zip
+	$(RMDIR) *.vfs
 
 distclean: distclean-packages clean
 	$(RM) Makefile config.status config.cache config.log tclConfig.sh \
-		tcl.hpj config.status.lineno
+		tcl.hpj config.status.lineno tclsh.exe.manifest
 
 #
 # Bundled package targets
@@ -884,5 +1038,6 @@ html-tk: $(TCLSH)
 .PHONY: gdb depend cleanhelp clean distclean packages install-packages
 .PHONY: test-packages clean-packages distclean-packages genstubs html
 .PHONY: html-tcl html-tk
+.PHONY: iinstall-libraries-zipfs-shared install-libraries-zipfs-static tclzipfile
 
 # DO NOT DELETE THIS LINE -- make depend depends on it.
diff --git a/win/configure b/win/configure
index 3289431..21c3cc7 100755
--- a/win/configure
+++ b/win/configure
@@ -699,6 +699,17 @@ VC_MANIFEST_EMBED_EXE
 VC_MANIFEST_EMBED_DLL
 LDFLAGS_DEFAULT
 CFLAGS_DEFAULT
+INSTALL_MSGS
+INSTALL_LIBRARIES
+TCL_ZIP_FILE
+ZIPFS_BUILD
+ZIP_INSTALL_OBJS
+ZIP_PROG_VFSSEARCH
+ZIP_PROG_OPTIONS
+ZIP_PROG
+TCLSH_PROG
+EXEEXT_FOR_BUILD
+CC_FOR_BUILD
 ZLIB_OBJS
 ZLIB_LIBS
 ZLIB_DLL_FILE
@@ -706,7 +717,9 @@ CFLAGS_WARNING
 CFLAGS_OPTIMIZE
 CFLAGS_DEBUG
 DL_LIBS
+WINE
 CYGPATH
+SHARED_BUILD
 SET_MAKE
 RC
 RANLIB
@@ -758,13 +771,15 @@ PACKAGE_VERSION
 PACKAGE_TARNAME
 PACKAGE_NAME
 PATH_SEPARATOR
-SHELL'
+SHELL
+OBJEXT_FOR_BUILD'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
 with_encoding
 enable_shared
 enable_64bit
+enable_zipfs
 enable_symbols
 enable_embedded_manifest
 '
@@ -1386,6 +1401,7 @@ Optional Features:
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --enable-shared         build and link with shared libraries (default: on)
   --enable-64bit          enable 64bit support (where applicable)
+  --enable-zipfs          build with Zipfs support (default: on)
   --enable-symbols        build with debugging symbols (default: off)
   --enable-embedded-manifest
                           embed manifest if possible (default: yes)
@@ -3731,6 +3747,7 @@ $as_echo "#define STATIC_BUILD 1" >>confdefs.h
     fi
 
 
+
 #--------------------------------------------------------------------
 # The statements below define a collection of compile flags.  This
 # macro depends on the value of SHARED_BUILD, and should be called
@@ -3814,6 +3831,43 @@ $as_echo "no" >&6; }
 fi
 
 
+    # Extract the first word of "wine", so it can be a program name with args.
+set dummy wine; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_WINE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$WINE"; then
+  ac_cv_prog_WINE="$WINE" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_WINE="wine"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+WINE=$ac_cv_prog_WINE
+if test -n "$WINE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WINE" >&5
+$as_echo "$WINE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
 
     SHLIB_SUFFIX=".dll"
 
@@ -4660,6 +4714,208 @@ _ACEOF
 fi
 
 
+
+#--------------------------------------------------------------------
+#	Zipfs support - Tip 430
+#--------------------------------------------------------------------
+# Check whether --enable-zipfs was given.
+if test "${enable_zipfs+set}" = set; then :
+  enableval=$enable_zipfs; tcl_ok=$enableval
+else
+  tcl_ok=yes
+fi
+
+if test "$tcl_ok" = "yes" ; then
+    #
+    # Find a native compiler
+    #
+    # Put a plausible default for CC_FOR_BUILD in Makefile.
+if test -z "$CC_FOR_BUILD"; then
+  if test "x$cross_compiling" = "xno"; then
+    CC_FOR_BUILD='$(CC)'
+  else
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcc" >&5
+$as_echo_n "checking for gcc... " >&6; }
+    if ${ac_cv_path_cc+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+	search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+	for dir in $search_path ; do
+	    for j in `ls -r $dir/gcc 2> /dev/null` \
+		    `ls -r $dir/gcc 2> /dev/null` ; do
+		if test x"$ac_cv_path_cc" = x ; then
+		    if test -f "$j" ; then
+			ac_cv_path_cc=$j
+			break
+		    fi
+		fi
+	    done
+	done
+
+fi
+
+  fi
+fi
+
+# Also set EXEEXT_FOR_BUILD.
+if test "x$cross_compiling" = "xno"; then
+  EXEEXT_FOR_BUILD='$(EXEEXT)'
+  OBJEXT_FOR_BUILD='$(OBJEXT)'
+else
+  OBJEXT_FOR_BUILD='.no'
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for build system executable suffix" >&5
+$as_echo_n "checking for build system executable suffix... " >&6; }
+if ${bfd_cv_build_exeext+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  rm -f conftest*
+     echo 'int main () { return 0; }' > conftest.c
+     bfd_cv_build_exeext=
+     ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
+     for file in conftest.*; do
+       case $file in
+       *.c | *.o | *.obj | *.ilk | *.pdb) ;;
+       *) bfd_cv_build_exeext=`echo $file | sed -e s/conftest//` ;;
+       esac
+     done
+     rm -f conftest*
+     test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $bfd_cv_build_exeext" >&5
+$as_echo "$bfd_cv_build_exeext" >&6; }
+  EXEEXT_FOR_BUILD=""
+  test x"${bfd_cv_build_exeext}" != xno && EXEEXT_FOR_BUILD=${bfd_cv_build_exeext}
+fi
+
+    #
+    # Find a native zip implementation
+    #
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tclsh" >&5
+$as_echo_n "checking for tclsh... " >&6; }
+
+    if ${ac_cv_path_tclsh+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+	search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+	for dir in $search_path ; do
+	    for j in `ls -r $dir/tclsh[8-9]*.exe 2> /dev/null` \
+		    `ls -r $dir/tclsh* 2> /dev/null` ; do
+		if test x"$ac_cv_path_tclsh" = x ; then
+		    if test -f "$j" ; then
+			ac_cv_path_tclsh=$j
+			break
+		    fi
+		fi
+	    done
+	done
+
+fi
+
+
+    if test -f "$ac_cv_path_tclsh" ; then
+	TCLSH_PROG="$ac_cv_path_tclsh"
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $TCLSH_PROG" >&5
+$as_echo "$TCLSH_PROG" >&6; }
+    else
+	# It is not an error if an installed version of Tcl can't be located.
+	TCLSH_PROG=""
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: No tclsh found on PATH" >&5
+$as_echo "No tclsh found on PATH" >&6; }
+    fi
+
+
+
+    ZIP_PROG=""
+    ZIP_PROG_OPTIONS=""
+    ZIP_PROG_VFSSEARCH=""
+    ZIP_INSTALL_OBJS=""
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for zip" >&5
+$as_echo_n "checking for zip... " >&6; }
+    if ${ac_cv_path_zip+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+    for dir in $search_path ; do
+        for j in `ls -r $dir/zip 2> /dev/null` \
+            `ls -r $dir/zip 2> /dev/null` ; do
+        if test x"$ac_cv_path_zip" = x ; then
+            if test -f "$j" ; then
+            ac_cv_path_zip=$j
+            break
+            fi
+        fi
+        done
+    done
+
+fi
+
+    if test -f "$ac_cv_path_zip" ; then
+        ZIP_PROG="$ac_cv_path_zip "
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ZIP_PROG" >&5
+$as_echo "$ZIP_PROG" >&6; }
+        ZIP_PROG_OPTIONS="-rq"
+        ZIP_PROG_VFSSEARCH="."
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: Found INFO Zip in environment" >&5
+$as_echo "Found INFO Zip in environment" >&6; }
+        # Use standard arguments for zip
+    else
+        # It is not an error if an installed version of Zip can't be located.
+        # We can use the locally distributed minizip instead
+        ZIP_PROG="../minizip${EXEEXT_FOR_BUILD}"
+        ZIP_PROG_OPTIONS="-o -r"
+        ZIP_PROG_VFSSEARCH="."
+        ZIP_INSTALL_OBJS="minizip${EXEEXT_FOR_BUILD}"
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: No zip found on PATH building minizip" >&5
+$as_echo "No zip found on PATH building minizip" >&6; }
+    fi
+
+
+
+
+
+	ZIPFS_BUILD=1
+	TCL_ZIP_FILE=libtcl_${TCL_MAJOR_VERSION}_${TCL_MINOR_VERSION}_${TCL_PATCH_LEVEL}.zip
+else
+	ZIPFS_BUILD=0
+	TCL_ZIP_FILE=
+fi
+# Do checking message here to not mess up interleaved configure output
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for building with zipfs" >&5
+$as_echo_n "checking for building with zipfs... " >&6; }
+if test "${ZIPFS_BUILD}" = 1; then
+    if test "${SHARED_BUILD}" = 0; then
+       ZIPFS_BUILD=2;
+
+$as_echo "#define ZIPFS_BUILD 2" >>confdefs.h
+
+       INSTALL_LIBRARIES=install-libraries-zipfs-static
+       { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+     else
+
+$as_echo "#define ZIPFS_BUILD 1" >>confdefs.h
+\
+       INSTALL_LIBRARIES=install-libraries-zipfs-shared
+       { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    fi
+else
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+INSTALL_LIBRARIES=install-libraries
+INSTALL_MSGS=install-msgs
+fi
+
+
+
+
+
+
 #--------------------------------------------------------------------
 # Perform additinal compiler tests.
 #--------------------------------------------------------------------
diff --git a/win/configure.ac b/win/configure.ac
index 922b206..7b63c61 100644
--- a/win/configure.ac
+++ b/win/configure.ac
@@ -168,6 +168,54 @@ AC_CHECK_TYPE([uintptr_t], [
     fi
 ])
 
+
+#--------------------------------------------------------------------
+#	Zipfs support - Tip 430
+#--------------------------------------------------------------------
+AC_ARG_ENABLE(zipfs,
+    AC_HELP_STRING([--enable-zipfs],
+	[build with Zipfs support (default: on)]),
+    [tcl_ok=$enableval], [tcl_ok=yes])
+if test "$tcl_ok" = "yes" ; then
+    #
+    # Find a native compiler
+    #
+    AX_CC_FOR_BUILD
+    #
+    # Find a native zip implementation
+    #
+    SC_PROG_TCLSH
+    SC_ZIPFS_SUPPORT
+	ZIPFS_BUILD=1
+	TCL_ZIP_FILE=libtcl_${TCL_MAJOR_VERSION}_${TCL_MINOR_VERSION}_${TCL_PATCH_LEVEL}.zip
+else
+	ZIPFS_BUILD=0
+	TCL_ZIP_FILE=
+fi
+# Do checking message here to not mess up interleaved configure output
+AC_MSG_CHECKING([for building with zipfs])
+if test "${ZIPFS_BUILD}" = 1; then
+    if test "${SHARED_BUILD}" = 0; then
+       ZIPFS_BUILD=2;
+       AC_DEFINE(ZIPFS_BUILD, 2, [Are we building with zipfs enabled?])
+       INSTALL_LIBRARIES=install-libraries-zipfs-static
+       AC_MSG_RESULT([yes])
+     else
+       AC_DEFINE(ZIPFS_BUILD, 1, [Are we building with zipfs enabled?])\
+       INSTALL_LIBRARIES=install-libraries-zipfs-shared
+       AC_MSG_RESULT([yes])
+    fi
+else
+AC_MSG_RESULT([no])
+INSTALL_LIBRARIES=install-libraries
+INSTALL_MSGS=install-msgs
+fi
+AC_SUBST(ZIPFS_BUILD)
+AC_SUBST(TCL_ZIP_FILE)
+AC_SUBST(INSTALL_LIBRARIES)
+AC_SUBST(INSTALL_MSGS)
+
+
 #--------------------------------------------------------------------
 # Perform additinal compiler tests.
 #--------------------------------------------------------------------
diff --git a/win/makefile.vc b/win/makefile.vc
index 1aae9a3..2554893 100644
--- a/win/makefile.vc
+++ b/win/makefile.vc
@@ -123,7 +123,6 @@ TCLDDELIBNAME	= $(PROJECT)dde$(DDEVERSION)$(SUFX:t=).$(EXT)
 TCLDDELIB	= $(OUT_DIR)\$(TCLDDELIBNAME)

 

 TCLTEST		= $(OUT_DIR)\$(PROJECT)test.exe

-CAT32		= $(OUT_DIR)\cat32.exe

 

 TCLSHOBJS = \

 	$(TMP_DIR)\tclAppInit.obj \

@@ -236,6 +235,7 @@ COREOBJS = \
 	$(TMP_DIR)\tclUtf.obj \

 	$(TMP_DIR)\tclUtil.obj \

 	$(TMP_DIR)\tclVar.obj \

+	$(TMP_DIR)\tclZipfs.obj \

 	$(TMP_DIR)\tclZlib.obj

 

 ZLIBOBJS = \

@@ -383,20 +383,20 @@ release:    setup $(TCLSH) $(TCLSTUBLIB) dlls pkgs
 core:	    setup $(TCLLIB) $(TCLSTUBLIB)

 shell:	    setup $(TCLSH)

 dlls:	    setup $(TCLREGLIB) $(TCLDDELIB)

-all:	    setup $(TCLSH) $(TCLSTUBLIB) dlls $(CAT32) pkgs

-tcltest:    setup $(TCLTEST) dlls $(CAT32)

+all:	    setup $(TCLSH) $(TCLSTUBLIB) dlls pkgs

+tcltest:    setup $(TCLTEST) dlls

 install:    install-binaries install-libraries install-docs install-pkgs

 setup:      default-setup

 

 test: test-core test-pkgs

-test-core: setup $(TCLTEST) dlls $(CAT32)

+test-core: setup $(TCLTEST) dlls

 	set TCL_LIBRARY=$(ROOT:\=/)/library

 	$(DEBUGGER) $(TCLTEST) "$(ROOT:\=/)/tests/all.tcl" $(TESTFLAGS) -loadfile <<

 		package ifneeded dde 1.4.0 [list load "$(TCLDDELIB:\=/)" dde]

 		package ifneeded registry 1.3.2 [list load "$(TCLREGLIB:\=/)" registry]

 <<

 

-runtest: setup $(TCLTEST) dlls $(CAT32)

+runtest: setup $(TCLTEST) dlls

 	set TCL_LIBRARY=$(ROOT:\=/)/library

 	$(DEBUGGER) $(TCLTEST) $(SCRIPT)

 

@@ -418,11 +418,11 @@ $(TCLLIB): $(TCLOBJS)
 $**

 <<

 	$(_VC_MANIFEST_EMBED_DLL)

+

 $(TCLIMPLIB): $(TCLLIB)

 

 !endif # $(STATIC_BUILD)

 

-

 $(TCLSTUBLIB): $(TCLSTUBOBJS)

 	$(LIBCMD) -nodefaultlib $(TCLSTUBOBJS)

 

@@ -484,11 +484,6 @@ clean-pkgs:
 	    popd \

 	  )

 

-$(CAT32): $(WINDIR)\cat.c

-	$(cc32) $(cflags) $(crt) -D_CRT_NONSTDC_NO_DEPRECATE -DCONSOLE -Fo$(TMP_DIR)\ $?

-	$(CONEXECMD) -stack:16384 $(TMP_DIR)\cat.obj

-	$(_VC_MANIFEST_EMBED_EXE)

-

 #---------------------------------------------------------------------

 # Regenerate the stubs files.  [Development use only]

 #---------------------------------------------------------------------

@@ -686,6 +681,9 @@ $(TMP_DIR)\tclTestObj.obj: $(GENERICDIR)\tclTestObj.c
 $(TMP_DIR)\tclWinTest.obj: $(WINDIR)\tclWinTest.c

 	$(CCAPPCMD) $?

 

+$(TMP_DIR)\tclZipfs.obj: $(GENERICDIR)\tclZipfs.c

+	$(cc32) $(pkgcflags) -I$(COMPATDIR)\zlib -I$(COMPATDIR)\zlib\contrib\minizip -Fo$@ $?

+

 $(TMP_DIR)\tclZlib.obj: $(GENERICDIR)\tclZlib.c

 	$(cc32) $(pkgcflags) -I$(COMPATDIR)\zlib -Fo$@ $?

 

@@ -701,6 +699,8 @@ $(TMP_DIR)\tclPkgConfig.obj: $(GENERICDIR)\tclPkgConfig.c
 	-DCFG_RUNTIME_SCRDIR="\"$(SCRIPT_INSTALL_DIR:\=\\)\"" \

 	-DCFG_RUNTIME_INCDIR="\"$(INCLUDE_INSTALL_DIR:\=\\)\"" \

 	-DCFG_RUNTIME_DOCDIR="\"$(DOC_INSTALL_DIR:\=\\)\""     \

+	-DCFG_RUNTIME_DLLFILE="\"$(CFG_RUNTIME_DLLFILE:\=\\)\""     \

+	-DCFG_RUNTIME_ZIPFILE="\"$(CFG_RUNTIME_ZIPFILE:\=\\)\""     \

 	-Fo$@ $?

 

 $(TMP_DIR)\tclAppInit.obj: $(WINDIR)\tclAppInit.c

diff --git a/win/tcl.m4 b/win/tcl.m4
index e2a2fb2..bdcd8ea 100644
--- a/win/tcl.m4
+++ b/win/tcl.m4
@@ -251,6 +251,7 @@ AC_DEFUN([SC_PATH_TKCONFIG], [
 #		TCL_BIN_DIR
 #		TCL_SRC_DIR
 #		TCL_LIB_FILE
+#		TCL_ZIP_FILE
 #
 #------------------------------------------------------------------------
 
@@ -283,6 +284,7 @@ AC_DEFUN([SC_LOAD_TCLCONFIG], [
     # eval is required to do the TCL_DBGX substitution
     #
 
+    eval "TCL_ZIP_FILE=\"${TCL_ZIP_FILE}\""
     eval "TCL_LIB_FILE=\"${TCL_LIB_FILE}\""
     eval "TCL_LIB_FLAG=\"${TCL_LIB_FLAG}\""
     eval "TCL_LIB_SPEC=\"${TCL_LIB_SPEC}\""
@@ -295,6 +297,7 @@ AC_DEFUN([SC_LOAD_TCLCONFIG], [
     AC_SUBST(TCL_BIN_DIR)
     AC_SUBST(TCL_SRC_DIR)
 
+    AC_SUBST(TCL_ZIP_FILE)
     AC_SUBST(TCL_LIB_FILE)
     AC_SUBST(TCL_LIB_FLAG)
     AC_SUBST(TCL_LIB_SPEC)
@@ -380,6 +383,7 @@ AC_DEFUN([SC_ENABLE_SHARED], [
 	SHARED_BUILD=0
 	AC_DEFINE(STATIC_BUILD, 1, [Is this a static build?])
     fi
+    AC_SUBST(SHARED_BUILD)
 ])
 
 #------------------------------------------------------------------------
@@ -513,6 +517,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
 	AC_DEFINE(MODULE_SCOPE, [extern], [No need to mark inidividual symbols as hidden])
 
     AC_CHECK_PROG(CYGPATH, cygpath, cygpath -m, echo)
+    AC_CHECK_PROG(WINE, wine, wine,)
 
     SHLIB_SUFFIX=".dll"
 
@@ -1159,3 +1164,126 @@ print("manifest needed")
     AC_SUBST(VC_MANIFEST_EMBED_DLL)
     AC_SUBST(VC_MANIFEST_EMBED_EXE)
 ])
+
+#------------------------------------------------------------------------
+# SC_CC_FOR_BUILD
+#	For cross compiles, locate a C compiler that can generate native binaries.
+#
+# Arguments:
+#	none
+#
+# Results:
+#	Substitutes the following vars:
+#		CC_FOR_BUILD
+#		EXEEXT_FOR_BUILD
+#------------------------------------------------------------------------
+
+dnl Get a default for CC_FOR_BUILD to put into Makefile.
+AC_DEFUN([AX_CC_FOR_BUILD],
+[# Put a plausible default for CC_FOR_BUILD in Makefile.
+if test -z "$CC_FOR_BUILD"; then
+  if test "x$cross_compiling" = "xno"; then
+    CC_FOR_BUILD='$(CC)'
+  else
+    AC_MSG_CHECKING([for gcc])
+    AC_CACHE_VAL(ac_cv_path_cc, [
+	search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+	for dir in $search_path ; do
+	    for j in `ls -r $dir/gcc 2> /dev/null` \
+		    `ls -r $dir/gcc 2> /dev/null` ; do
+		if test x"$ac_cv_path_cc" = x ; then
+		    if test -f "$j" ; then
+			ac_cv_path_cc=$j
+			break
+		    fi
+		fi
+	    done
+	done
+    ])
+  fi
+fi
+AC_SUBST(CC_FOR_BUILD)
+# Also set EXEEXT_FOR_BUILD.
+if test "x$cross_compiling" = "xno"; then
+  EXEEXT_FOR_BUILD='$(EXEEXT)'
+  OBJEXT_FOR_BUILD='$(OBJEXT)'
+else
+  OBJEXT_FOR_BUILD='.no'
+  AC_CACHE_CHECK([for build system executable suffix], bfd_cv_build_exeext,
+    [rm -f conftest*
+     echo 'int main () { return 0; }' > conftest.c
+     bfd_cv_build_exeext=
+     ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
+     for file in conftest.*; do
+       case $file in
+       *.c | *.o | *.obj | *.ilk | *.pdb) ;;
+       *) bfd_cv_build_exeext=`echo $file | sed -e s/conftest//` ;;
+       esac
+     done
+     rm -f conftest*
+     test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no])
+  EXEEXT_FOR_BUILD=""
+  test x"${bfd_cv_build_exeext}" != xno && EXEEXT_FOR_BUILD=${bfd_cv_build_exeext}
+fi
+AC_SUBST(EXEEXT_FOR_BUILD)])dnl
+AC_SUBST(OBJEXT_FOR_BUILD)])dnl
+
+
+
+#------------------------------------------------------------------------
+# SC_ZIPFS_SUPPORT
+#	Locate a zip encoder installed on the system path, or none.
+#
+# Arguments:
+#	none
+#
+# Results:
+#	Substitutes the following vars:
+#		ZIP_PROG
+#       ZIP_PROG_OPTIONS
+#       ZIP_PROG_VFSSEARCH
+#       ZIP_INSTALL_OBJS
+#------------------------------------------------------------------------
+
+AC_DEFUN([SC_ZIPFS_SUPPORT], [
+    ZIP_PROG=""
+    ZIP_PROG_OPTIONS=""
+    ZIP_PROG_VFSSEARCH=""
+    ZIP_INSTALL_OBJS=""
+
+    AC_MSG_CHECKING([for zip])
+    AC_CACHE_VAL(ac_cv_path_zip, [
+    search_path=`echo ${PATH} | sed -e 's/:/ /g'`
+    for dir in $search_path ; do
+        for j in `ls -r $dir/zip 2> /dev/null` \
+            `ls -r $dir/zip 2> /dev/null` ; do
+        if test x"$ac_cv_path_zip" = x ; then
+            if test -f "$j" ; then
+            ac_cv_path_zip=$j
+            break
+            fi
+        fi
+        done
+    done
+    ])
+    if test -f "$ac_cv_path_zip" ; then
+        ZIP_PROG="$ac_cv_path_zip "
+        AC_MSG_RESULT([$ZIP_PROG])
+        ZIP_PROG_OPTIONS="-rq"
+        ZIP_PROG_VFSSEARCH="."
+        AC_MSG_RESULT([Found INFO Zip in environment])
+        # Use standard arguments for zip
+    else
+        # It is not an error if an installed version of Zip can't be located.
+        # We can use the locally distributed minizip instead
+        ZIP_PROG="../minizip${EXEEXT_FOR_BUILD}"
+        ZIP_PROG_OPTIONS="-o -r"
+        ZIP_PROG_VFSSEARCH="."
+        ZIP_INSTALL_OBJS="minizip${EXEEXT_FOR_BUILD}"
+        AC_MSG_RESULT([No zip found on PATH building minizip])
+    fi
+    AC_SUBST(ZIP_PROG)
+    AC_SUBST(ZIP_PROG_OPTIONS)
+    AC_SUBST(ZIP_PROG_VFSSEARCH)
+    AC_SUBST(ZIP_INSTALL_OBJS)
+])
diff --git a/win/tclAppInit.c b/win/tclAppInit.c
index 9e0514d..fa27756 100644
--- a/win/tclAppInit.c
+++ b/win/tclAppInit.c
@@ -126,6 +126,9 @@ _tmain(
 
 #ifdef TCL_LOCAL_MAIN_HOOK
     TCL_LOCAL_MAIN_HOOK(&argc, &argv);
+#elif !defined(_WIN32) || defined(UNICODE)
+    /* This doesn't work on Windows without UNICODE */
+    TclZipfs_AppHook(&argc, &argv);
 #endif
 
     Tcl_Main(argc, argv, TCL_LOCAL_APPINIT);
diff --git a/win/tclConfig.sh.in b/win/tclConfig.sh.in
index 8aa25f8..5dc6833 100644
--- a/win/tclConfig.sh.in
+++ b/win/tclConfig.sh.in
@@ -41,6 +41,9 @@ TCL_SHARED_BUILD=@TCL_SHARED_BUILD@
 # The name of the Tcl library (may be either a .a file or a shared library):
 TCL_LIB_FILE='@TCL_LIB_FILE@'
 
+# The name of a zip containing the /library and /encodings (may be either a .zip file or a shared library):
+TCL_ZIP_FILE='@TCL_ZIP_FILE@'
+
 # Flag to indicate whether shared libraries need export files.
 TCL_NEEDS_EXP_FILE=@TCL_NEEDS_EXP_FILE@
 
diff --git a/win/tclWin32Dll.c b/win/tclWin32Dll.c
index 74787c5..dca6875 100644
--- a/win/tclWin32Dll.c
+++ b/win/tclWin32Dll.c
@@ -471,17 +471,11 @@ Tcl_WinUtfToTChar(
     Tcl_DString *dsPtr)		/* Uninitialized or free DString in which the
 				 * converted string is stored. */
 {
-    TCHAR *wp;
-    int size = MultiByteToWideChar(CP_UTF8, 0, string, len, 0, 0);
-
     Tcl_DStringInit(dsPtr);
-    Tcl_DStringSetLength(dsPtr, 2*size+2);
-    wp = (TCHAR *)Tcl_DStringValue(dsPtr);
-    MultiByteToWideChar(CP_UTF8, 0, string, len, wp, size+1);
-    if (len == -1) --size; /* account for 0-byte at string end */
-    Tcl_DStringSetLength(dsPtr, 2*size);
-    wp[size] = 0;
-    return wp;
+    if (!string) {
+	return NULL;
+    }
+    return Tcl_UtfToUniCharDString(string, len, dsPtr);
 }
 
 char *
@@ -492,21 +486,16 @@ Tcl_WinTCharToUtf(
     Tcl_DString *dsPtr)		/* Uninitialized or free DString in which the
 				 * converted string is stored. */
 {
-    char *p;
-    int size;
-
-    if (len > 0) {
+    Tcl_DStringInit(dsPtr);
+    if (!string) {
+	return NULL;
+    }
+    if (len < 0) {
+	len = wcslen(string);
+    } else {
 	len /= 2;
     }
-    size = WideCharToMultiByte(CP_UTF8, 0, string, len, 0, 0, NULL, NULL);
-    Tcl_DStringInit(dsPtr);
-    Tcl_DStringSetLength(dsPtr, size+1);
-    p = (char *)Tcl_DStringValue(dsPtr);
-    WideCharToMultiByte(CP_UTF8, 0, string, len, p, size, NULL, NULL);
-    if (len == -1) --size; /* account for 0-byte at string end */
-    Tcl_DStringSetLength(dsPtr, size);
-    p[size] = 0;
-    return p;
+    return Tcl_UniCharToUtfDString(string, len, dsPtr);
 }
 
 /*
diff --git a/win/tclWinChan.c b/win/tclWinChan.c
index 8ffb31f..8c47be6 100644
--- a/win/tclWinChan.c
+++ b/win/tclWinChan.c
@@ -554,8 +554,8 @@ FileWideSeekProc(
 	moveMethod = FILE_END;
     }
 
-    newPosHigh = Tcl_WideAsLong(offset >> 32);
-    newPos = SetFilePointer(infoPtr->handle, Tcl_WideAsLong(offset),
+    newPosHigh = (LONG)(offset >> 32);
+    newPos = SetFilePointer(infoPtr->handle, (LONG)offset,
 	    &newPosHigh, moveMethod);
     if (newPos == (LONG) INVALID_SET_FILE_POINTER) {
 	DWORD winError = GetLastError();
@@ -567,7 +567,7 @@ FileWideSeekProc(
 	}
     }
     return (((Tcl_WideInt)((unsigned)newPos))
-	    | (Tcl_LongAsWide(newPosHigh) << 32));
+	    | ((Tcl_WideInt)newPosHigh << 32));
 }
 
 /*
@@ -613,8 +613,8 @@ FileTruncateProc(
      * Move to where we want to truncate
      */
 
-    newPosHigh = Tcl_WideAsLong(length >> 32);
-    newPos = SetFilePointer(infoPtr->handle, Tcl_WideAsLong(length),
+    newPosHigh = (LONG)(length >> 32);
+    newPos = SetFilePointer(infoPtr->handle, (LONG)length,
 	    &newPosHigh, FILE_BEGIN);
     if (newPos == (LONG) INVALID_SET_FILE_POINTER) {
 	DWORD winError = GetLastError();
diff --git a/win/tclWinFCmd.c b/win/tclWinFCmd.c
index 319ecf9..c3ced34 100644
--- a/win/tclWinFCmd.c
+++ b/win/tclWinFCmd.c
@@ -337,7 +337,7 @@ DoRenameFile(
 	     * character is either end-of-string or a directory separator
 	     */
 
-	    if ((strncmp(src, dst, (size_t) Tcl_DStringLength(&srcString))==0)
+	    if ((strncmp(src, dst, Tcl_DStringLength(&srcString))==0)
 		    && (dst[Tcl_DStringLength(&srcString)] == '\\'
 		    || dst[Tcl_DStringLength(&srcString)] == '/'
 		    || dst[Tcl_DStringLength(&srcString)] == '\0')) {
@@ -1026,7 +1026,8 @@ DoRemoveJustDirectory(
 
     if (nativePath == NULL || nativePath[0] == '\0') {
 	Tcl_SetErrno(ENOENT);
-	goto end;
+	Tcl_DStringInit(errorPtr);
+	return TCL_ERROR;
     }
 
     attr = GetFileAttributes(nativePath);
@@ -1108,9 +1109,7 @@ DoRemoveJustDirectory(
 
   end:
     if (errorPtr != NULL) {
-	char *p;
-	Tcl_WinTCharToUtf(nativePath, -1, errorPtr);
-	p = Tcl_DStringValue(errorPtr);
+	char *p = Tcl_WinTCharToUtf(nativePath, -1, errorPtr);
 	for (; *p; ++p) {
 	    if (*p == '\\') *p = '/';
 	}
@@ -1650,7 +1649,6 @@ ConvertFileNameFormat(
 	     * likely to lead to infinite loops.
 	     */
 
-	    Tcl_DStringInit(&ds);
 	    tempString = TclGetString(tempPath);
 	    nativeName = Tcl_WinUtfToTChar(tempString, tempPath->length, &ds);
 	    Tcl_DecrRefCount(tempPath);
diff --git a/win/tclWinReg.c b/win/tclWinReg.c
index 95ab499..f3d7a07 100644
--- a/win/tclWinReg.c
+++ b/win/tclWinReg.c
@@ -156,7 +156,7 @@ Registry_Init(
     cmd = Tcl_CreateObjCommand(interp, "registry", RegistryObjCmd,
 	    interp, DeleteCmd);
     Tcl_SetAssocData(interp, REGISTRY_ASSOC_KEY, NULL, cmd);
-    return Tcl_PkgProvide(interp, "registry", "1.3.2");
+    return Tcl_PkgProvide(interp, "registry", "1.3.3");
 }
 
 /*
@@ -407,12 +407,12 @@ DeleteKey(
      */
 
     keyName = Tcl_GetString(keyNameObj);
-    buffer = ckalloc(keyNameObj->length + 1);
+    buffer = Tcl_Alloc(keyNameObj->length + 1);
     strcpy(buffer, keyName);
 
     if (ParseKeyName(interp, buffer, &hostName, &rootKey,
 	    &keyName) != TCL_OK) {
-	ckfree(buffer);
+	Tcl_Free(buffer);
 	return TCL_ERROR;
     }
 
@@ -420,7 +420,7 @@ DeleteKey(
 	Tcl_SetObjResult(interp,
 		Tcl_NewStringObj("bad key: cannot delete root keys", -1));
 	Tcl_SetErrorCode(interp, "WIN_REG", "DEL_ROOT_KEY", NULL);
-	ckfree(buffer);
+	Tcl_Free(buffer);
 	return TCL_ERROR;
     }
 
@@ -435,7 +435,7 @@ DeleteKey(
     mode |= KEY_ENUMERATE_SUB_KEYS | DELETE;
     result = OpenSubKey(hostName, rootKey, keyName, mode, 0, &subkey);
     if (result != ERROR_SUCCESS) {
-	ckfree(buffer);
+	Tcl_Free(buffer);
 	if (result == ERROR_FILE_NOT_FOUND) {
 	    return TCL_OK;
 	}
@@ -463,7 +463,7 @@ DeleteKey(
     }
 
     RegCloseKey(subkey);
-    ckfree(buffer);
+    Tcl_Free(buffer);
     return result;
 }
 
@@ -596,8 +596,7 @@ GetKeyNames(
 	    }
 	    break;
 	}
-	Tcl_WinTCharToUtf(buffer, bufSize * sizeof(TCHAR), &ds);
-	name = Tcl_DStringValue(&ds);
+	name = Tcl_WinTCharToUtf(buffer, bufSize * sizeof(TCHAR), &ds);
 	if (pattern && !Tcl_StringMatch(name, pattern)) {
 	    Tcl_DStringFree(&ds);
 	    continue;
@@ -943,7 +942,7 @@ OpenKey(
 
     keyName = Tcl_GetString(keyNameObj);
     length = keyNameObj->length;
-    buffer = ckalloc(length + 1);
+    buffer = Tcl_Alloc(length + 1);
     strcpy(buffer, keyName);
 
     result = ParseKeyName(interp, buffer, &hostName, &rootKey, &keyName);
@@ -959,7 +958,7 @@ OpenKey(
 	}
     }
 
-    ckfree(buffer);
+    Tcl_Free(buffer);
     return result;
 }
 
@@ -1012,7 +1011,9 @@ OpenSubKey(
      * this key must be closed by the caller.
      */
 
-    keyName = (char *) Tcl_WinUtfToTChar(keyName, -1, &buf);
+    if (keyName) {
+	keyName = (char *) Tcl_WinUtfToTChar(keyName, -1, &buf);
+    }
     if (flags & REG_CREATE) {
 	DWORD create;
 
@@ -1030,7 +1031,9 @@ OpenSubKey(
 	result = RegOpenKeyEx(rootKey, (TCHAR *)keyName, 0, mode,
 		keyPtr);
     }
-    Tcl_DStringFree(&buf);
+    if (keyName) {
+	Tcl_DStringFree(&buf);
+    }
 
     /*
      * Be sure to close the root key since we are done with it now.