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-rw-r--r--compat/zlib/gzlib.c31
1 files changed, 17 insertions, 14 deletions
diff --git a/compat/zlib/gzlib.c b/compat/zlib/gzlib.c
index fae202e..4105e6a 100644
--- a/compat/zlib/gzlib.c
+++ b/compat/zlib/gzlib.c
@@ -1,11 +1,11 @@
/* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
-#if defined(_WIN32) && !defined(__BORLANDC__)
+#if defined(_WIN32) && !defined(__BORLANDC__) && !defined(__MINGW32__)
# define LSEEK _lseeki64
#else
#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
@@ -94,7 +94,7 @@ local gzFile gz_open(path, fd, mode)
const char *mode;
{
gz_statep state;
- size_t len;
+ z_size_t len;
int oflag;
#ifdef O_CLOEXEC
int cloexec = 0;
@@ -188,10 +188,10 @@ local gzFile gz_open(path, fd, mode)
}
/* save the path name for error messages */
-#ifdef _WIN32
+#ifdef WIDECHAR
if (fd == -2) {
len = wcstombs(NULL, path, 0);
- if (len == (size_t)-1)
+ if (len == (z_size_t)-1)
len = 0;
}
else
@@ -202,7 +202,7 @@ local gzFile gz_open(path, fd, mode)
free(state);
return NULL;
}
-#ifdef _WIN32
+#ifdef WIDECHAR
if (fd == -2)
if (len)
wcstombs(state->path, path, len + 1);
@@ -211,7 +211,7 @@ local gzFile gz_open(path, fd, mode)
else
#endif
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
- snprintf(state->path, len + 1, "%s", (const char *)path);
+ (void)snprintf(state->path, len + 1, "%s", (const char *)path);
#else
strcpy(state->path, path);
#endif
@@ -239,7 +239,7 @@ local gzFile gz_open(path, fd, mode)
/* open the file with the appropriate flags (or just use fd) */
state->fd = fd > -1 ? fd : (
-#ifdef _WIN32
+#ifdef WIDECHAR
fd == -2 ? _wopen(path, oflag, 0666) :
#endif
open((const char *)path, oflag, 0666));
@@ -248,8 +248,10 @@ local gzFile gz_open(path, fd, mode)
free(state);
return NULL;
}
- if (state->mode == GZ_APPEND)
+ if (state->mode == GZ_APPEND) {
+ LSEEK(state->fd, 0, SEEK_END); /* so gzoffset() is correct */
state->mode = GZ_WRITE; /* simplify later checks */
+ }
/* save the current position for rewinding (only if reading) */
if (state->mode == GZ_READ) {
@@ -291,7 +293,7 @@ gzFile ZEXPORT gzdopen(fd, mode)
if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
return NULL;
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
- snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); /* for debugging */
+ (void)snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd);
#else
sprintf(path, "<fd:%d>", fd); /* for debugging */
#endif
@@ -301,7 +303,7 @@ gzFile ZEXPORT gzdopen(fd, mode)
}
/* -- see zlib.h -- */
-#ifdef _WIN32
+#ifdef WIDECHAR
gzFile ZEXPORT gzopen_w(path, mode)
const wchar_t *path;
const char *mode;
@@ -329,6 +331,8 @@ int ZEXPORT gzbuffer(file, size)
return -1;
/* check and set requested size */
+ if ((size << 1) < size)
+ return -1; /* need to be able to double it */
if (size < 2)
size = 2; /* need two bytes to check magic header */
state->want = size;
@@ -604,14 +608,13 @@ void ZLIB_INTERNAL gz_error(state, err, msg)
return;
}
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
- snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
- "%s%s%s", state->path, ": ", msg);
+ (void)snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
+ "%s%s%s", state->path, ": ", msg);
#else
strcpy(state->msg, state->path);
strcat(state->msg, ": ");
strcat(state->msg, msg);
#endif
- return;
}
#ifndef INT_MAX