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authorrjohnson <rjohnson>1998-03-26 14:45:59 (GMT)
committerrjohnson <rjohnson>1998-03-26 14:45:59 (GMT)
commit2b5738da524e944cda39e24c0a87b745a43bd8c3 (patch)
tree6e8c9473978f6dab66c601e911721a7bd9d70b1b /generic/tclFileName.c
parentc6a259aeeca4814a97cf6694814c63e74e4e18fa (diff)
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Initial revision
Diffstat (limited to 'generic/tclFileName.c')
-rw-r--r--generic/tclFileName.c1619
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diff --git a/generic/tclFileName.c b/generic/tclFileName.c
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+/*
+ * tclFileName.c --
+ *
+ * This file contains routines for converting file names betwen
+ * native and network form.
+ *
+ * Copyright (c) 1995-1996 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tclFileName.c 1.32 97/08/19 18:44:03
+ */
+
+#include "tclInt.h"
+#include "tclPort.h"
+#include "tclRegexp.h"
+
+/*
+ * This variable indicates whether the cleanup procedure has been
+ * registered for this file yet.
+ */
+
+static int initialized = 0;
+
+/*
+ * The following regular expression matches the root portion of a Windows
+ * absolute or volume relative path. It will match both UNC and drive relative
+ * paths.
+ */
+
+#define WIN_ROOT_PATTERN "^(([a-zA-Z]:)|[/\\][/\\]+([^/\\]+)[/\\]+([^/\\]+)|([/\\]))([/\\])*"
+
+/*
+ * The following regular expression matches the root portion of a Macintosh
+ * absolute path. It will match degenerate Unix-style paths, tilde paths,
+ * Unix-style paths, and Mac paths.
+ */
+
+#define MAC_ROOT_PATTERN "^((/+([.][.]?/+)*([.][.]?)?)|(~[^:/]*)(/[^:]*)?|(~[^:]*)(:.*)?|/+([.][.]?/+)*([^:/]+)(/[^:]*)?|([^:]+):.*)$"
+
+/*
+ * The following variables are used to hold precompiled regular expressions
+ * for use in filename matching.
+ */
+
+static regexp *winRootPatternPtr = NULL;
+static regexp *macRootPatternPtr = NULL;
+
+/*
+ * The following variable is set in the TclPlatformInit call to one
+ * of: TCL_PLATFORM_UNIX, TCL_PLATFORM_MAC, or TCL_PLATFORM_WINDOWS.
+ */
+
+TclPlatformType tclPlatform = TCL_PLATFORM_UNIX;
+
+/*
+ * Prototypes for local procedures defined in this file:
+ */
+
+static char * DoTildeSubst _ANSI_ARGS_((Tcl_Interp *interp,
+ char *user, Tcl_DString *resultPtr));
+static char * ExtractWinRoot _ANSI_ARGS_((char *path,
+ Tcl_DString *resultPtr, int offset));
+static void FileNameCleanup _ANSI_ARGS_((ClientData clientData));
+static int SkipToChar _ANSI_ARGS_((char **stringPtr,
+ char *match));
+static char * SplitMacPath _ANSI_ARGS_((char *path,
+ Tcl_DString *bufPtr));
+static char * SplitWinPath _ANSI_ARGS_((char *path,
+ Tcl_DString *bufPtr));
+static char * SplitUnixPath _ANSI_ARGS_((char *path,
+ Tcl_DString *bufPtr));
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * FileNameCleanup --
+ *
+ * This procedure is a Tcl_ExitProc used to clean up the static
+ * data structures used in this file.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Deallocates storage used by the procedures in this file.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+FileNameCleanup(clientData)
+ ClientData clientData; /* Not used. */
+{
+ if (winRootPatternPtr != NULL) {
+ ckfree((char *)winRootPatternPtr);
+ winRootPatternPtr = (regexp *) NULL;
+ }
+ if (macRootPatternPtr != NULL) {
+ ckfree((char *)macRootPatternPtr);
+ macRootPatternPtr = (regexp *) NULL;
+ }
+ initialized = 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ExtractWinRoot --
+ *
+ * Matches the root portion of a Windows path and appends it
+ * to the specified Tcl_DString.
+ *
+ * Results:
+ * Returns the position in the path immediately after the root
+ * including any trailing slashes.
+ * Appends a cleaned up version of the root to the Tcl_DString
+ * at the specified offest.
+ *
+ * Side effects:
+ * Modifies the specified Tcl_DString.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static char *
+ExtractWinRoot(path, resultPtr, offset)
+ char *path; /* Path to parse. */
+ Tcl_DString *resultPtr; /* Buffer to hold result. */
+ int offset; /* Offset in buffer where result should be
+ * stored. */
+{
+ int length;
+
+ /*
+ * Initialize the path name parser for Windows path names.
+ */
+
+ if (winRootPatternPtr == NULL) {
+ winRootPatternPtr = TclRegComp(WIN_ROOT_PATTERN);
+ if (!initialized) {
+ Tcl_CreateExitHandler(FileNameCleanup, NULL);
+ initialized = 1;
+ }
+ }
+
+ /*
+ * Match the root portion of a Windows path name.
+ */
+
+ if (!TclRegExec(winRootPatternPtr, path, path)) {
+ return path;
+ }
+
+ Tcl_DStringSetLength(resultPtr, offset);
+
+ if (winRootPatternPtr->startp[2] != NULL) {
+ Tcl_DStringAppend(resultPtr, winRootPatternPtr->startp[2], 2);
+ if (winRootPatternPtr->startp[6] != NULL) {
+ Tcl_DStringAppend(resultPtr, "/", 1);
+ }
+ } else if (winRootPatternPtr->startp[4] != NULL) {
+ Tcl_DStringAppend(resultPtr, "//", 2);
+ length = winRootPatternPtr->endp[3]
+ - winRootPatternPtr->startp[3];
+ Tcl_DStringAppend(resultPtr, winRootPatternPtr->startp[3], length);
+ Tcl_DStringAppend(resultPtr, "/", 1);
+ length = winRootPatternPtr->endp[4]
+ - winRootPatternPtr->startp[4];
+ Tcl_DStringAppend(resultPtr, winRootPatternPtr->startp[4], length);
+ } else {
+ Tcl_DStringAppend(resultPtr, "/", 1);
+ }
+ return winRootPatternPtr->endp[0];
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetPathType --
+ *
+ * Determines whether a given path is relative to the current
+ * directory, relative to the current volume, or absolute.
+ *
+ * Results:
+ * Returns one of TCL_PATH_ABSOLUTE, TCL_PATH_RELATIVE, or
+ * TCL_PATH_VOLUME_RELATIVE.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_PathType
+Tcl_GetPathType(path)
+ char *path;
+{
+ Tcl_PathType type = TCL_PATH_ABSOLUTE;
+
+ switch (tclPlatform) {
+ case TCL_PLATFORM_UNIX:
+ /*
+ * Paths that begin with / or ~ are absolute.
+ */
+
+ if ((path[0] != '/') && (path[0] != '~')) {
+ type = TCL_PATH_RELATIVE;
+ }
+ break;
+
+ case TCL_PLATFORM_MAC:
+ if (path[0] == ':') {
+ type = TCL_PATH_RELATIVE;
+ } else if (path[0] != '~') {
+
+ /*
+ * Since we have eliminated the easy cases, use the
+ * root pattern to look for the other types.
+ */
+
+ if (!macRootPatternPtr) {
+ macRootPatternPtr = TclRegComp(MAC_ROOT_PATTERN);
+ if (!initialized) {
+ Tcl_CreateExitHandler(FileNameCleanup, NULL);
+ initialized = 1;
+ }
+ }
+ if (!TclRegExec(macRootPatternPtr, path, path)
+ || (macRootPatternPtr->startp[2] != NULL)) {
+ type = TCL_PATH_RELATIVE;
+ }
+ }
+ break;
+
+ case TCL_PLATFORM_WINDOWS:
+ if (path[0] != '~') {
+
+ /*
+ * Since we have eliminated the easy cases, check for
+ * drive relative paths using the regular expression.
+ */
+
+ if (!winRootPatternPtr) {
+ winRootPatternPtr = TclRegComp(WIN_ROOT_PATTERN);
+ if (!initialized) {
+ Tcl_CreateExitHandler(FileNameCleanup, NULL);
+ initialized = 1;
+ }
+ }
+ if (TclRegExec(winRootPatternPtr, path, path)) {
+ if (winRootPatternPtr->startp[5]
+ || (winRootPatternPtr->startp[2]
+ && !(winRootPatternPtr->startp[6]))) {
+ type = TCL_PATH_VOLUME_RELATIVE;
+ }
+ } else {
+ type = TCL_PATH_RELATIVE;
+ }
+ }
+ break;
+ }
+ return type;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_SplitPath --
+ *
+ * Split a path into a list of path components. The first element
+ * of the list will have the same path type as the original path.
+ *
+ * Results:
+ * Returns a standard Tcl result. The interpreter result contains
+ * a list of path components.
+ * *argvPtr will be filled in with the address of an array
+ * whose elements point to the elements of path, in order.
+ * *argcPtr will get filled in with the number of valid elements
+ * in the array. A single block of memory is dynamically allocated
+ * to hold both the argv array and a copy of the path elements.
+ * The caller must eventually free this memory by calling ckfree()
+ * on *argvPtr. Note: *argvPtr and *argcPtr are only modified
+ * if the procedure returns normally.
+ *
+ * Side effects:
+ * Allocates memory.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+Tcl_SplitPath(path, argcPtr, argvPtr)
+ char *path; /* Pointer to string containing a path. */
+ int *argcPtr; /* Pointer to location to fill in with
+ * the number of elements in the path. */
+ char ***argvPtr; /* Pointer to place to store pointer to array
+ * of pointers to path elements. */
+{
+ int i, size;
+ char *p;
+ Tcl_DString buffer;
+ Tcl_DStringInit(&buffer);
+
+ /*
+ * Perform platform specific splitting. These routines will leave the
+ * result in the specified buffer. Individual elements are terminated
+ * with a null character.
+ */
+
+ p = NULL; /* Needed only to prevent gcc warnings. */
+ switch (tclPlatform) {
+ case TCL_PLATFORM_UNIX:
+ p = SplitUnixPath(path, &buffer);
+ break;
+
+ case TCL_PLATFORM_WINDOWS:
+ p = SplitWinPath(path, &buffer);
+ break;
+
+ case TCL_PLATFORM_MAC:
+ p = SplitMacPath(path, &buffer);
+ break;
+ }
+
+ /*
+ * Compute the number of elements in the result.
+ */
+
+ size = Tcl_DStringLength(&buffer);
+ *argcPtr = 0;
+ for (i = 0; i < size; i++) {
+ if (p[i] == '\0') {
+ (*argcPtr)++;
+ }
+ }
+
+ /*
+ * Allocate a buffer large enough to hold the contents of the
+ * DString plus the argv pointers and the terminating NULL pointer.
+ */
+
+ *argvPtr = (char **) ckalloc((unsigned)
+ ((((*argcPtr) + 1) * sizeof(char *)) + size));
+
+ /*
+ * Position p after the last argv pointer and copy the contents of
+ * the DString.
+ */
+
+ p = (char *) &(*argvPtr)[(*argcPtr) + 1];
+ memcpy((VOID *) p, (VOID *) Tcl_DStringValue(&buffer), (size_t) size);
+
+ /*
+ * Now set up the argv pointers.
+ */
+
+ for (i = 0; i < *argcPtr; i++) {
+ (*argvPtr)[i] = p;
+ while ((*p++) != '\0') {}
+ }
+ (*argvPtr)[i] = NULL;
+
+ Tcl_DStringFree(&buffer);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * SplitUnixPath --
+ *
+ * This routine is used by Tcl_SplitPath to handle splitting
+ * Unix paths.
+ *
+ * Results:
+ * Stores a null separated array of strings in the specified
+ * Tcl_DString.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static char *
+SplitUnixPath(path, bufPtr)
+ char *path; /* Pointer to string containing a path. */
+ Tcl_DString *bufPtr; /* Pointer to DString to use for the result. */
+{
+ int length;
+ char *p, *elementStart;
+
+ /*
+ * Deal with the root directory as a special case.
+ */
+
+ if (path[0] == '/') {
+ Tcl_DStringAppend(bufPtr, "/", 2);
+ p = path+1;
+ } else {
+ p = path;
+ }
+
+ /*
+ * Split on slashes. Embedded elements that start with tilde will be
+ * prefixed with "./" so they are not affected by tilde substitution.
+ */
+
+ for (;;) {
+ elementStart = p;
+ while ((*p != '\0') && (*p != '/')) {
+ p++;
+ }
+ length = p - elementStart;
+ if (length > 0) {
+ if ((elementStart[0] == '~') && (elementStart != path)) {
+ Tcl_DStringAppend(bufPtr, "./", 2);
+ }
+ Tcl_DStringAppend(bufPtr, elementStart, length);
+ Tcl_DStringAppend(bufPtr, "", 1);
+ }
+ if (*p++ == '\0') {
+ break;
+ }
+ }
+ return Tcl_DStringValue(bufPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * SplitWinPath --
+ *
+ * This routine is used by Tcl_SplitPath to handle splitting
+ * Windows paths.
+ *
+ * Results:
+ * Stores a null separated array of strings in the specified
+ * Tcl_DString.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static char *
+SplitWinPath(path, bufPtr)
+ char *path; /* Pointer to string containing a path. */
+ Tcl_DString *bufPtr; /* Pointer to DString to use for the result. */
+{
+ int length;
+ char *p, *elementStart;
+
+ p = ExtractWinRoot(path, bufPtr, 0);
+
+ /*
+ * Terminate the root portion, if we matched something.
+ */
+
+ if (p != path) {
+ Tcl_DStringAppend(bufPtr, "", 1);
+ }
+
+ /*
+ * Split on slashes. Embedded elements that start with tilde will be
+ * prefixed with "./" so they are not affected by tilde substitution.
+ */
+
+ do {
+ elementStart = p;
+ while ((*p != '\0') && (*p != '/') && (*p != '\\')) {
+ p++;
+ }
+ length = p - elementStart;
+ if (length > 0) {
+ if ((elementStart[0] == '~') && (elementStart != path)) {
+ Tcl_DStringAppend(bufPtr, "./", 2);
+ }
+ Tcl_DStringAppend(bufPtr, elementStart, length);
+ Tcl_DStringAppend(bufPtr, "", 1);
+ }
+ } while (*p++ != '\0');
+
+ return Tcl_DStringValue(bufPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * SplitMacPath --
+ *
+ * This routine is used by Tcl_SplitPath to handle splitting
+ * Macintosh paths.
+ *
+ * Results:
+ * Returns a newly allocated argv array.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static char *
+SplitMacPath(path, bufPtr)
+ char *path; /* Pointer to string containing a path. */
+ Tcl_DString *bufPtr; /* Pointer to DString to use for the result. */
+{
+ int isMac = 0; /* 1 if is Mac-style, 0 if Unix-style path. */
+ int i, length;
+ char *p, *elementStart;
+
+ /*
+ * Initialize the path name parser for Macintosh path names.
+ */
+
+ if (macRootPatternPtr == NULL) {
+ macRootPatternPtr = TclRegComp(MAC_ROOT_PATTERN);
+ if (!initialized) {
+ Tcl_CreateExitHandler(FileNameCleanup, NULL);
+ initialized = 1;
+ }
+ }
+
+ /*
+ * Match the root portion of a Mac path name.
+ */
+
+ i = 0; /* Needed only to prevent gcc warnings. */
+ if (TclRegExec(macRootPatternPtr, path, path) == 1) {
+ /*
+ * Treat degenerate absolute paths like / and /../.. as
+ * Mac relative file names for lack of anything else to do.
+ */
+
+ if (macRootPatternPtr->startp[2] != NULL) {
+ Tcl_DStringAppend(bufPtr, ":", 1);
+ Tcl_DStringAppend(bufPtr, path, macRootPatternPtr->endp[0]
+ - macRootPatternPtr->startp[0] + 1);
+ return Tcl_DStringValue(bufPtr);
+ }
+
+ if (macRootPatternPtr->startp[5] != NULL) {
+
+ /*
+ * Unix-style tilde prefixed paths.
+ */
+
+ isMac = 0;
+ i = 5;
+ } else if (macRootPatternPtr->startp[7] != NULL) {
+
+ /*
+ * Mac-style tilde prefixed paths.
+ */
+
+ isMac = 1;
+ i = 7;
+ } else if (macRootPatternPtr->startp[10] != NULL) {
+
+ /*
+ * Normal Unix style paths.
+ */
+
+ isMac = 0;
+ i = 10;
+ } else if (macRootPatternPtr->startp[12] != NULL) {
+
+ /*
+ * Normal Mac style paths.
+ */
+
+ isMac = 1;
+ i = 12;
+ }
+
+ length = macRootPatternPtr->endp[i]
+ - macRootPatternPtr->startp[i];
+
+ /*
+ * Append the element and terminate it with a : and a null. Note that
+ * we are forcing the DString to contain an extra null at the end.
+ */
+
+ Tcl_DStringAppend(bufPtr, macRootPatternPtr->startp[i], length);
+ Tcl_DStringAppend(bufPtr, ":", 2);
+ p = macRootPatternPtr->endp[i];
+ } else {
+ isMac = (strchr(path, ':') != NULL);
+ p = path;
+ }
+
+ if (isMac) {
+
+ /*
+ * p is pointing at the first colon in the path. There
+ * will always be one, since this is a Mac-style path.
+ */
+
+ elementStart = p++;
+ while ((p = strchr(p, ':')) != NULL) {
+ length = p - elementStart;
+ if (length == 1) {
+ while (*p == ':') {
+ Tcl_DStringAppend(bufPtr, "::", 3);
+ elementStart = p++;
+ }
+ } else {
+ /*
+ * If this is a simple component, drop the leading colon.
+ */
+
+ if ((elementStart[1] != '~')
+ && (strchr(elementStart+1, '/') == NULL)) {
+ elementStart++;
+ length--;
+ }
+ Tcl_DStringAppend(bufPtr, elementStart, length);
+ Tcl_DStringAppend(bufPtr, "", 1);
+ elementStart = p++;
+ }
+ }
+ if (elementStart[1] != '\0' || elementStart == path) {
+ if ((elementStart[1] != '~') && (elementStart[1] != '\0')
+ && (strchr(elementStart+1, '/') == NULL)) {
+ elementStart++;
+ }
+ Tcl_DStringAppend(bufPtr, elementStart, -1);
+ Tcl_DStringAppend(bufPtr, "", 1);
+ }
+ } else {
+
+ /*
+ * Split on slashes, suppress extra /'s, and convert .. to ::.
+ */
+
+ for (;;) {
+ elementStart = p;
+ while ((*p != '\0') && (*p != '/')) {
+ p++;
+ }
+ length = p - elementStart;
+ if (length > 0) {
+ if ((length == 1) && (elementStart[0] == '.')) {
+ Tcl_DStringAppend(bufPtr, ":", 2);
+ } else if ((length == 2) && (elementStart[0] == '.')
+ && (elementStart[1] == '.')) {
+ Tcl_DStringAppend(bufPtr, "::", 3);
+ } else {
+ if (*elementStart == '~') {
+ Tcl_DStringAppend(bufPtr, ":", 1);
+ }
+ Tcl_DStringAppend(bufPtr, elementStart, length);
+ Tcl_DStringAppend(bufPtr, "", 1);
+ }
+ }
+ if (*p++ == '\0') {
+ break;
+ }
+ }
+ }
+ return Tcl_DStringValue(bufPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_JoinPath --
+ *
+ * Combine a list of paths in a platform specific manner.
+ *
+ * Results:
+ * Appends the joined path to the end of the specified
+ * returning a pointer to the resulting string. Note that
+ * the Tcl_DString must already be initialized.
+ *
+ * Side effects:
+ * Modifies the Tcl_DString.
+ *
+ *----------------------------------------------------------------------
+ */
+
+char *
+Tcl_JoinPath(argc, argv, resultPtr)
+ int argc;
+ char **argv;
+ Tcl_DString *resultPtr; /* Pointer to previously initialized DString. */
+{
+ int oldLength, length, i, needsSep;
+ Tcl_DString buffer;
+ char *p, c, *dest;
+
+ Tcl_DStringInit(&buffer);
+ oldLength = Tcl_DStringLength(resultPtr);
+
+ switch (tclPlatform) {
+ case TCL_PLATFORM_UNIX:
+ for (i = 0; i < argc; i++) {
+ p = argv[i];
+ /*
+ * If the path is absolute, reset the result buffer.
+ * Consume any duplicate leading slashes or a ./ in
+ * front of a tilde prefixed path that isn't at the
+ * beginning of the path.
+ */
+
+ if (*p == '/') {
+ Tcl_DStringSetLength(resultPtr, oldLength);
+ Tcl_DStringAppend(resultPtr, "/", 1);
+ while (*p == '/') {
+ p++;
+ }
+ } else if (*p == '~') {
+ Tcl_DStringSetLength(resultPtr, oldLength);
+ } else if ((Tcl_DStringLength(resultPtr) != oldLength)
+ && (p[0] == '.') && (p[1] == '/')
+ && (p[2] == '~')) {
+ p += 2;
+ }
+
+ if (*p == '\0') {
+ continue;
+ }
+
+ /*
+ * Append a separator if needed.
+ */
+
+ length = Tcl_DStringLength(resultPtr);
+ if ((length != oldLength)
+ && (Tcl_DStringValue(resultPtr)[length-1] != '/')) {
+ Tcl_DStringAppend(resultPtr, "/", 1);
+ length++;
+ }
+
+ /*
+ * Append the element, eliminating duplicate and trailing
+ * slashes.
+ */
+
+ Tcl_DStringSetLength(resultPtr, (int) (length + strlen(p)));
+ dest = Tcl_DStringValue(resultPtr) + length;
+ for (; *p != '\0'; p++) {
+ if (*p == '/') {
+ while (p[1] == '/') {
+ p++;
+ }
+ if (p[1] != '\0') {
+ *dest++ = '/';
+ }
+ } else {
+ *dest++ = *p;
+ }
+ }
+ length = dest - Tcl_DStringValue(resultPtr);
+ Tcl_DStringSetLength(resultPtr, length);
+ }
+ break;
+
+ case TCL_PLATFORM_WINDOWS:
+ /*
+ * Iterate over all of the components. If a component is
+ * absolute, then reset the result and start building the
+ * path from the current component on.
+ */
+
+ for (i = 0; i < argc; i++) {
+ p = ExtractWinRoot(argv[i], resultPtr, oldLength);
+ length = Tcl_DStringLength(resultPtr);
+
+ /*
+ * If the pointer didn't move, then this is a relative path
+ * or a tilde prefixed path.
+ */
+
+ if (p == argv[i]) {
+ /*
+ * Remove the ./ from tilde prefixed elements unless
+ * it is the first component.
+ */
+
+ if ((length != oldLength)
+ && (p[0] == '.')
+ && ((p[1] == '/') || (p[1] == '\\'))
+ && (p[2] == '~')) {
+ p += 2;
+ } else if (*p == '~') {
+ Tcl_DStringSetLength(resultPtr, oldLength);
+ length = oldLength;
+ }
+ }
+
+ if (*p != '\0') {
+ /*
+ * Check to see if we need to append a separator.
+ */
+
+
+ if (length != oldLength) {
+ c = Tcl_DStringValue(resultPtr)[length-1];
+ if ((c != '/') && (c != ':')) {
+ Tcl_DStringAppend(resultPtr, "/", 1);
+ }
+ }
+
+ /*
+ * Append the element, eliminating duplicate and
+ * trailing slashes.
+ */
+
+ length = Tcl_DStringLength(resultPtr);
+ Tcl_DStringSetLength(resultPtr, (int) (length + strlen(p)));
+ dest = Tcl_DStringValue(resultPtr) + length;
+ for (; *p != '\0'; p++) {
+ if ((*p == '/') || (*p == '\\')) {
+ while ((p[1] == '/') || (p[1] == '\\')) {
+ p++;
+ }
+ if (p[1] != '\0') {
+ *dest++ = '/';
+ }
+ } else {
+ *dest++ = *p;
+ }
+ }
+ length = dest - Tcl_DStringValue(resultPtr);
+ Tcl_DStringSetLength(resultPtr, length);
+ }
+ }
+ break;
+
+ case TCL_PLATFORM_MAC:
+ needsSep = 1;
+ for (i = 0; i < argc; i++) {
+ Tcl_DStringSetLength(&buffer, 0);
+ p = SplitMacPath(argv[i], &buffer);
+ if ((*p != ':') && (*p != '\0')
+ && (strchr(p, ':') != NULL)) {
+ Tcl_DStringSetLength(resultPtr, oldLength);
+ length = strlen(p);
+ Tcl_DStringAppend(resultPtr, p, length);
+ needsSep = 0;
+ p += length+1;
+ }
+
+ /*
+ * Now append the rest of the path elements, skipping
+ * : unless it is the first element of the path, and
+ * watching out for :: et al. so we don't end up with
+ * too many colons in the result.
+ */
+
+ for (; *p != '\0'; p += length+1) {
+ if (p[0] == ':' && p[1] == '\0') {
+ if (Tcl_DStringLength(resultPtr) != oldLength) {
+ p++;
+ } else {
+ needsSep = 0;
+ }
+ } else {
+ c = p[1];
+ if (*p == ':') {
+ if (!needsSep) {
+ p++;
+ }
+ } else {
+ if (needsSep) {
+ Tcl_DStringAppend(resultPtr, ":", 1);
+ }
+ }
+ needsSep = (c == ':') ? 0 : 1;
+ }
+ length = strlen(p);
+ Tcl_DStringAppend(resultPtr, p, length);
+ }
+ }
+ break;
+
+ }
+ Tcl_DStringFree(&buffer);
+ return Tcl_DStringValue(resultPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_TranslateFileName --
+ *
+ * Converts a file name into a form usable by the native system
+ * interfaces. If the name starts with a tilde, it will produce
+ * a name where the tilde and following characters have been
+ * replaced by the home directory location for the named user.
+ *
+ * Results:
+ * The result is a pointer to a static string containing
+ * the new name. If there was an error in processing the
+ * name, then an error message is left in interp->result
+ * and the return value is NULL. The result will be stored
+ * in bufferPtr; the caller must call Tcl_DStringFree(bufferPtr)
+ * to free the name if the return value was not NULL.
+ *
+ * Side effects:
+ * Information may be left in bufferPtr.
+ *
+ *----------------------------------------------------------------------
+ */
+
+char *
+Tcl_TranslateFileName(interp, name, bufferPtr)
+ Tcl_Interp *interp; /* Interpreter in which to store error
+ * message (if necessary). */
+ char *name; /* File name, which may begin with "~"
+ * (to indicate current user's home directory)
+ * or "~<user>" (to indicate any user's
+ * home directory). */
+ Tcl_DString *bufferPtr; /* May be used to hold result. Must not hold
+ * anything at the time of the call, and need
+ * not even be initialized. */
+{
+ register char *p;
+
+ /*
+ * Handle tilde substitutions, if needed.
+ */
+
+ if (name[0] == '~') {
+ int argc, length;
+ char **argv;
+ Tcl_DString temp;
+
+ Tcl_SplitPath(name, &argc, &argv);
+
+ /*
+ * Strip the trailing ':' off of a Mac path
+ * before passing the user name to DoTildeSubst.
+ */
+
+ if (tclPlatform == TCL_PLATFORM_MAC) {
+ length = strlen(argv[0]);
+ argv[0][length-1] = '\0';
+ }
+
+ Tcl_DStringInit(&temp);
+ argv[0] = DoTildeSubst(interp, argv[0]+1, &temp);
+ if (argv[0] == NULL) {
+ Tcl_DStringFree(&temp);
+ ckfree((char *)argv);
+ return NULL;
+ }
+ Tcl_DStringInit(bufferPtr);
+ Tcl_JoinPath(argc, argv, bufferPtr);
+ Tcl_DStringFree(&temp);
+ ckfree((char*)argv);
+ } else {
+ Tcl_DStringInit(bufferPtr);
+ Tcl_JoinPath(1, &name, bufferPtr);
+ }
+
+ /*
+ * Convert forward slashes to backslashes in Windows paths because
+ * some system interfaces don't accept forward slashes.
+ */
+
+ if (tclPlatform == TCL_PLATFORM_WINDOWS) {
+ for (p = Tcl_DStringValue(bufferPtr); *p != '\0'; p++) {
+ if (*p == '/') {
+ *p = '\\';
+ }
+ }
+ }
+ return Tcl_DStringValue(bufferPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclGetExtension --
+ *
+ * This function returns a pointer to the beginning of the
+ * extension part of a file name.
+ *
+ * Results:
+ * Returns a pointer into name which indicates where the extension
+ * starts. If there is no extension, returns NULL.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+char *
+TclGetExtension(name)
+ char *name; /* File name to parse. */
+{
+ char *p, *lastSep;
+
+ /*
+ * First find the last directory separator.
+ */
+
+ lastSep = NULL; /* Needed only to prevent gcc warnings. */
+ switch (tclPlatform) {
+ case TCL_PLATFORM_UNIX:
+ lastSep = strrchr(name, '/');
+ break;
+
+ case TCL_PLATFORM_MAC:
+ if (strchr(name, ':') == NULL) {
+ lastSep = strrchr(name, '/');
+ } else {
+ lastSep = strrchr(name, ':');
+ }
+ break;
+
+ case TCL_PLATFORM_WINDOWS:
+ lastSep = NULL;
+ for (p = name; *p != '\0'; p++) {
+ if (strchr("/\\:", *p) != NULL) {
+ lastSep = p;
+ }
+ }
+ break;
+ }
+ p = strrchr(name, '.');
+ if ((p != NULL) && (lastSep != NULL)
+ && (lastSep > p)) {
+ p = NULL;
+ }
+
+ /*
+ * Back up to the first period in a series of contiguous dots.
+ * This is needed so foo..o will be split on the first dot.
+ */
+
+ if (p != NULL) {
+ while ((p > name) && *(p-1) == '.') {
+ p--;
+ }
+ }
+ return p;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DoTildeSubst --
+ *
+ * Given a string following a tilde, this routine returns the
+ * corresponding home directory.
+ *
+ * Results:
+ * The result is a pointer to a static string containing the home
+ * directory in native format. If there was an error in processing
+ * the substitution, then an error message is left in interp->result
+ * and the return value is NULL. On success, the results are appended
+ * to resultPtr, and the contents of resultPtr are returned.
+ *
+ * Side effects:
+ * Information may be left in resultPtr.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static char *
+DoTildeSubst(interp, user, resultPtr)
+ Tcl_Interp *interp; /* Interpreter in which to store error
+ * message (if necessary). */
+ char *user; /* Name of user whose home directory should be
+ * substituted, or "" for current user. */
+ Tcl_DString *resultPtr; /* May be used to hold result. Must not hold
+ * anything at the time of the call, and need
+ * not even be initialized. */
+{
+ char *dir;
+
+ if (*user == '\0') {
+ dir = TclGetEnv("HOME");
+ if (dir == NULL) {
+ if (interp) {
+ Tcl_ResetResult(interp);
+ Tcl_AppendResult(interp, "couldn't find HOME environment ",
+ "variable to expand path", (char *) NULL);
+ }
+ return NULL;
+ }
+ Tcl_JoinPath(1, &dir, resultPtr);
+ } else {
+
+ /* lint, TclGetuserHome() always NULL under windows. */
+ if (TclGetUserHome(user, resultPtr) == NULL) {
+ if (interp) {
+ Tcl_ResetResult(interp);
+ Tcl_AppendResult(interp, "user \"", user, "\" doesn't exist",
+ (char *) NULL);
+ }
+ return NULL;
+ }
+ }
+ return resultPtr->string;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GlobCmd --
+ *
+ * This procedure is invoked to process the "glob" Tcl command.
+ * See the user documentation for details on what it does.
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * See the user documentation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+ /* ARGSUSED */
+int
+Tcl_GlobCmd(dummy, interp, argc, argv)
+ ClientData dummy; /* Not used. */
+ Tcl_Interp *interp; /* Current interpreter. */
+ int argc; /* Number of arguments. */
+ char **argv; /* Argument strings. */
+{
+ int i, noComplain, firstArg;
+ char c;
+ int result = TCL_OK;
+ Tcl_DString buffer;
+ char *separators, *head, *tail;
+
+ noComplain = 0;
+ for (firstArg = 1; (firstArg < argc) && (argv[firstArg][0] == '-');
+ firstArg++) {
+ if (strcmp(argv[firstArg], "-nocomplain") == 0) {
+ noComplain = 1;
+ } else if (strcmp(argv[firstArg], "--") == 0) {
+ firstArg++;
+ break;
+ } else {
+ Tcl_AppendResult(interp, "bad switch \"", argv[firstArg],
+ "\": must be -nocomplain or --", (char *) NULL);
+ return TCL_ERROR;
+ }
+ }
+ if (firstArg >= argc) {
+ Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
+ " ?switches? name ?name ...?\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ Tcl_DStringInit(&buffer);
+ separators = NULL; /* Needed only to prevent gcc warnings. */
+ for (i = firstArg; i < argc; i++) {
+ switch (tclPlatform) {
+ case TCL_PLATFORM_UNIX:
+ separators = "/";
+ break;
+ case TCL_PLATFORM_WINDOWS:
+ separators = "/\\:";
+ break;
+ case TCL_PLATFORM_MAC:
+ separators = (strchr(argv[i], ':') == NULL) ? "/" : ":";
+ break;
+ }
+
+ Tcl_DStringSetLength(&buffer, 0);
+
+ /*
+ * Perform tilde substitution, if needed.
+ */
+
+ if (argv[i][0] == '~') {
+ char *p;
+
+ /*
+ * Find the first path separator after the tilde.
+ */
+
+ for (tail = argv[i]; *tail != '\0'; tail++) {
+ if (*tail == '\\') {
+ if (strchr(separators, tail[1]) != NULL) {
+ break;
+ }
+ } else if (strchr(separators, *tail) != NULL) {
+ break;
+ }
+ }
+
+ /*
+ * Determine the home directory for the specified user. Note that
+ * we don't allow special characters in the user name.
+ */
+
+ c = *tail;
+ *tail = '\0';
+ p = strpbrk(argv[i]+1, "\\[]*?{}");
+ if (p == NULL) {
+ head = DoTildeSubst(interp, argv[i]+1, &buffer);
+ } else {
+ if (!noComplain) {
+ Tcl_ResetResult(interp);
+ Tcl_AppendResult(interp, "globbing characters not ",
+ "supported in user names", (char *) NULL);
+ }
+ head = NULL;
+ }
+ *tail = c;
+ if (head == NULL) {
+ if (noComplain) {
+ Tcl_ResetResult(interp);
+ continue;
+ } else {
+ result = TCL_ERROR;
+ goto done;
+ }
+ }
+ if (head != Tcl_DStringValue(&buffer)) {
+ Tcl_DStringAppend(&buffer, head, -1);
+ }
+ } else {
+ tail = argv[i];
+ }
+
+ result = TclDoGlob(interp, separators, &buffer, tail);
+ if (result != TCL_OK) {
+ if (noComplain) {
+ /*
+ * We should in fact pass down the nocomplain flag
+ * or save the interp result or use another mecanism
+ * so the interp result is not mangled on errors in that case.
+ * but that would a bigger change than reasonable for a patch
+ * release.
+ * (see fileName.test 15.2-15.4 for expected behaviour)
+ */
+ Tcl_ResetResult(interp);
+ result = TCL_OK;
+ continue;
+ } else {
+ goto done;
+ }
+ }
+ }
+
+ if ((*interp->result == 0) && !noComplain) {
+ char *sep = "";
+
+ Tcl_AppendResult(interp, "no files matched glob pattern",
+ (argc == 2) ? " \"" : "s \"", (char *) NULL);
+ for (i = firstArg; i < argc; i++) {
+ Tcl_AppendResult(interp, sep, argv[i], (char *) NULL);
+ sep = " ";
+ }
+ Tcl_AppendResult(interp, "\"", (char *) NULL);
+ result = TCL_ERROR;
+ }
+done:
+ Tcl_DStringFree(&buffer);
+ return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * SkipToChar --
+ *
+ * This function traverses a glob pattern looking for the next
+ * unquoted occurance of the specified character at the same braces
+ * nesting level.
+ *
+ * Results:
+ * Updates stringPtr to point to the matching character, or to
+ * the end of the string if nothing matched. The return value
+ * is 1 if a match was found at the top level, otherwise it is 0.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+SkipToChar(stringPtr, match)
+ char **stringPtr; /* Pointer string to check. */
+ char *match; /* Pointer to character to find. */
+{
+ int quoted, level;
+ register char *p;
+
+ quoted = 0;
+ level = 0;
+
+ for (p = *stringPtr; *p != '\0'; p++) {
+ if (quoted) {
+ quoted = 0;
+ continue;
+ }
+ if ((level == 0) && (*p == *match)) {
+ *stringPtr = p;
+ return 1;
+ }
+ if (*p == '{') {
+ level++;
+ } else if (*p == '}') {
+ level--;
+ } else if (*p == '\\') {
+ quoted = 1;
+ }
+ }
+ *stringPtr = p;
+ return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclDoGlob --
+ *
+ * This recursive procedure forms the heart of the globbing
+ * code. It performs a depth-first traversal of the tree
+ * given by the path name to be globbed. The directory and
+ * remainder are assumed to be native format paths.
+ *
+ * Results:
+ * The return value is a standard Tcl result indicating whether
+ * an error occurred in globbing. After a normal return the
+ * result in interp will be set to hold all of the file names
+ * given by the dir and rem arguments. After an error the
+ * result in interp will hold an error message.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclDoGlob(interp, separators, headPtr, tail)
+ Tcl_Interp *interp; /* Interpreter to use for error reporting
+ * (e.g. unmatched brace). */
+ char *separators; /* String containing separator characters
+ * that should be used to identify globbing
+ * boundaries. */
+ Tcl_DString *headPtr; /* Completely expanded prefix. */
+ char *tail; /* The unexpanded remainder of the path. */
+{
+ int baseLength, quoted, count;
+ int result = TCL_OK;
+ char *p, *openBrace, *closeBrace, *name, *firstSpecialChar, savedChar;
+ char lastChar = 0;
+ int length = Tcl_DStringLength(headPtr);
+
+ if (length > 0) {
+ lastChar = Tcl_DStringValue(headPtr)[length-1];
+ }
+
+ /*
+ * Consume any leading directory separators, leaving tail pointing
+ * just past the last initial separator.
+ */
+
+ count = 0;
+ name = tail;
+ for (; *tail != '\0'; tail++) {
+ if ((*tail == '\\') && (strchr(separators, tail[1]) != NULL)) {
+ tail++;
+ } else if (strchr(separators, *tail) == NULL) {
+ break;
+ }
+ count++;
+ }
+
+ /*
+ * Deal with path separators. On the Mac, we have to watch out
+ * for multiple separators, since they are special in Mac-style
+ * paths.
+ */
+
+ switch (tclPlatform) {
+ case TCL_PLATFORM_MAC:
+ if (*separators == '/') {
+ if (((length == 0) && (count == 0))
+ || ((length > 0) && (lastChar != ':'))) {
+ Tcl_DStringAppend(headPtr, ":", 1);
+ }
+ } else {
+ if (count == 0) {
+ if ((length > 0) && (lastChar != ':')) {
+ Tcl_DStringAppend(headPtr, ":", 1);
+ }
+ } else {
+ if (lastChar == ':') {
+ count--;
+ }
+ while (count-- > 0) {
+ Tcl_DStringAppend(headPtr, ":", 1);
+ }
+ }
+ }
+ break;
+ case TCL_PLATFORM_WINDOWS:
+ /*
+ * If this is a drive relative path, add the colon and the
+ * trailing slash if needed. Otherwise add the slash if
+ * this is the first absolute element, or a later relative
+ * element. Add an extra slash if this is a UNC path.
+ */
+
+ if (*name == ':') {
+ Tcl_DStringAppend(headPtr, ":", 1);
+ if (count > 1) {
+ Tcl_DStringAppend(headPtr, "/", 1);
+ }
+ } else if ((*tail != '\0')
+ && (((length > 0)
+ && (strchr(separators, lastChar) == NULL))
+ || ((length == 0) && (count > 0)))) {
+ Tcl_DStringAppend(headPtr, "/", 1);
+ if ((length == 0) && (count > 1)) {
+ Tcl_DStringAppend(headPtr, "/", 1);
+ }
+ }
+
+ break;
+ case TCL_PLATFORM_UNIX:
+ /*
+ * Add a separator if this is the first absolute element, or
+ * a later relative element.
+ */
+
+ if ((*tail != '\0')
+ && (((length > 0)
+ && (strchr(separators, lastChar) == NULL))
+ || ((length == 0) && (count > 0)))) {
+ Tcl_DStringAppend(headPtr, "/", 1);
+ }
+ break;
+ }
+
+ /*
+ * Look for the first matching pair of braces or the first
+ * directory separator that is not inside a pair of braces.
+ */
+
+ openBrace = closeBrace = NULL;
+ quoted = 0;
+ for (p = tail; *p != '\0'; p++) {
+ if (quoted) {
+ quoted = 0;
+ } else if (*p == '\\') {
+ quoted = 1;
+ if (strchr(separators, p[1]) != NULL) {
+ break; /* Quoted directory separator. */
+ }
+ } else if (strchr(separators, *p) != NULL) {
+ break; /* Unquoted directory separator. */
+ } else if (*p == '{') {
+ openBrace = p;
+ p++;
+ if (SkipToChar(&p, "}")) {
+ closeBrace = p; /* Balanced braces. */
+ break;
+ }
+ Tcl_SetResult(interp, "unmatched open-brace in file name",
+ TCL_STATIC);
+ return TCL_ERROR;
+ } else if (*p == '}') {
+ Tcl_SetResult(interp, "unmatched close-brace in file name",
+ TCL_STATIC);
+ return TCL_ERROR;
+ }
+ }
+
+ /*
+ * Substitute the alternate patterns from the braces and recurse.
+ */
+
+ if (openBrace != NULL) {
+ char *element;
+ Tcl_DString newName;
+ Tcl_DStringInit(&newName);
+
+ /*
+ * For each element within in the outermost pair of braces,
+ * append the element and the remainder to the fixed portion
+ * before the first brace and recursively call TclDoGlob.
+ */
+
+ Tcl_DStringAppend(&newName, tail, openBrace-tail);
+ baseLength = Tcl_DStringLength(&newName);
+ length = Tcl_DStringLength(headPtr);
+ *closeBrace = '\0';
+ for (p = openBrace; p != closeBrace; ) {
+ p++;
+ element = p;
+ SkipToChar(&p, ",");
+ Tcl_DStringSetLength(headPtr, length);
+ Tcl_DStringSetLength(&newName, baseLength);
+ Tcl_DStringAppend(&newName, element, p-element);
+ Tcl_DStringAppend(&newName, closeBrace+1, -1);
+ result = TclDoGlob(interp, separators,
+ headPtr, Tcl_DStringValue(&newName));
+ if (result != TCL_OK) {
+ break;
+ }
+ }
+ *closeBrace = '}';
+ Tcl_DStringFree(&newName);
+ return result;
+ }
+
+ /*
+ * At this point, there are no more brace substitutions to perform on
+ * this path component. The variable p is pointing at a quoted or
+ * unquoted directory separator or the end of the string. So we need
+ * to check for special globbing characters in the current pattern.
+ * We avoid modifying tail if p is pointing at the end of the string.
+ */
+
+ if (*p != '\0') {
+ savedChar = *p;
+ *p = '\0';
+ firstSpecialChar = strpbrk(tail, "*[]?\\");
+ *p = savedChar;
+ } else {
+ firstSpecialChar = strpbrk(tail, "*[]?\\");
+ }
+
+ if (firstSpecialChar != NULL) {
+ /*
+ * Look for matching files in the current directory. The
+ * implementation of this function is platform specific, but may
+ * recursively call TclDoGlob. For each file that matches, it will
+ * add the match onto the interp->result, or call TclDoGlob if there
+ * are more characters to be processed.
+ */
+
+ return TclMatchFiles(interp, separators, headPtr, tail, p);
+ }
+ Tcl_DStringAppend(headPtr, tail, p-tail);
+ if (*p != '\0') {
+ return TclDoGlob(interp, separators, headPtr, p);
+ }
+
+ /*
+ * There are no more wildcards in the pattern and no more unprocessed
+ * characters in the tail, so now we can construct the path and verify
+ * the existence of the file.
+ */
+
+ switch (tclPlatform) {
+ case TCL_PLATFORM_MAC:
+ if (strchr(Tcl_DStringValue(headPtr), ':') == NULL) {
+ Tcl_DStringAppend(headPtr, ":", 1);
+ }
+ name = Tcl_DStringValue(headPtr);
+ if (access(name, F_OK) == 0) {
+ if ((name[1] != '\0') && (strchr(name+1, ':') == NULL)) {
+ Tcl_AppendElement(interp, name+1);
+ } else {
+ Tcl_AppendElement(interp, name);
+ }
+ }
+ break;
+ case TCL_PLATFORM_WINDOWS: {
+ int exists;
+ /*
+ * We need to convert slashes to backslashes before checking
+ * for the existence of the file. Once we are done, we need
+ * to convert the slashes back.
+ */
+
+ if (Tcl_DStringLength(headPtr) == 0) {
+ if (((*name == '\\') && (name[1] == '/' || name[1] == '\\'))
+ || (*name == '/')) {
+ Tcl_DStringAppend(headPtr, "\\", 1);
+ } else {
+ Tcl_DStringAppend(headPtr, ".", 1);
+ }
+ } else {
+ for (p = Tcl_DStringValue(headPtr); *p != '\0'; p++) {
+ if (*p == '/') {
+ *p = '\\';
+ }
+ }
+ }
+ name = Tcl_DStringValue(headPtr);
+ exists = (access(name, F_OK) == 0);
+ for (p = name; *p != '\0'; p++) {
+ if (*p == '\\') {
+ *p = '/';
+ }
+ }
+ if (exists) {
+ Tcl_AppendElement(interp, name);
+ }
+ break;
+ }
+ case TCL_PLATFORM_UNIX:
+ if (Tcl_DStringLength(headPtr) == 0) {
+ if ((*name == '\\' && name[1] == '/') || (*name == '/')) {
+ Tcl_DStringAppend(headPtr, "/", 1);
+ } else {
+ Tcl_DStringAppend(headPtr, ".", 1);
+ }
+ }
+ name = Tcl_DStringValue(headPtr);
+ if (access(name, F_OK) == 0) {
+ Tcl_AppendElement(interp, name);
+ }
+ break;
+ }
+
+ return TCL_OK;
+}