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archie/tcl7.6/generic/tclFileName.c

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Update tcl/tk for tcl-dp
2024-05-27 16:40:40 +02:00
/*
* 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 1.24 96/08/21 12:49:02
*/
#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);
}
if (macRootPatternPtr != NULL) {
ckfree((char *)macRootPatternPtr);
}
}
/*
*----------------------------------------------------------------------
*
* 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 {
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++) {
head = tail = "";
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) {
Tcl_ResetResult(interp);
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 level, baseLength, quoted, count;
int result = TCL_OK;
char *p, *openBrace, *closeBrace, *name, 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;
level = 0;
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_ResetResult(interp);
interp->result = "unmatched open-brace in file name";
return TCL_ERROR;
} else if (*p == '}') {
Tcl_ResetResult(interp);
interp->result = "unmatched close-brace in file name";
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.
*/
savedChar = *p;
*p = '\0';
if (strpbrk(tail, "*[]?\\") != NULL) {
*p = savedChar;
/*
* 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);
}
*p = savedChar;
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;
}
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