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Diffstat (limited to 'generic/tclFileName.c')
| -rw-r--r-- | generic/tclFileName.c | 1619 |
1 files changed, 1619 insertions, 0 deletions
diff --git a/generic/tclFileName.c b/generic/tclFileName.c new file mode 100644 index 0000000..2024b61 --- /dev/null +++ b/generic/tclFileName.c @@ -0,0 +1,1619 @@ +/* + * 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; +} |