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Overview
Comment:* generic/tclFileName.c: Moved global regexps into thread local storage.
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SHA1: 958a4f2ca002fd7e15e586c6dfaed9d688b3e416
User & Date: stanton 1999-04-05 23:14:26
Context
1999-04-05
23:14
*** empty log message *** check-in: 044e1720ab user: stanton tags: core-8-1-branch-old
23:14
* generic/tclFileName.c: Moved global regexps into thread local storage. check-in: 958a4f2ca0 user: stanton tags: core-8-1-branch-old
23:14
* tests/platform.test: * tests/fileName.test: Fixed broken tests. check-in: 2064a18cad user: stanton tags: core-8-1-branch-old
Changes
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Changes to generic/tclFileName.c. 

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 *
 * Copyright (c) 1995-1998 Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclFileName.c,v 1.1.2.11 1999/04/05 22:20:30 rjohnson Exp $
 */

#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]:)|[/\\\\][/\\\\]+([^/\\\\]+)[/\\\\]+([^/\\\\]+)|([/\\\\]))([/\\\\])*"
................................................................................
#define MAC_ROOT_PATTERN "^((/+([.][.]?/+)*([.][.]?)?)|(~[^:/]*)(/[^:]*)?|(~[^:]*)(:.*)?|/+([.][.]?/+)*([^:/]+)(/[^:]*)?|([^:]+):.*)$"

/*
 * The following variables are used to hold precompiled regular expressions
 * for use in filename matching.
 */



static Tcl_Obj *winRootPatternPtr = NULL;
static Tcl_Obj *macRootPatternPtr = NULL;
TCL_DECLARE_MUTEX(nameMutex)




/*
 * 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;
................................................................................
 */

static char *		DoTildeSubst _ANSI_ARGS_((Tcl_Interp *interp,
			    CONST char *user, Tcl_DString *resultPtr));
static CONST char *	ExtractWinRoot _ANSI_ARGS_((CONST 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_((CONST char *path,
			    Tcl_DString *bufPtr));
static char *		SplitWinPath _ANSI_ARGS_((CONST char *path,
			    Tcl_DString *bufPtr));
static char *		SplitUnixPath _ANSI_ARGS_((CONST char *path,
................................................................................
 *
 *----------------------------------------------------------------------
 */

static void
FileNameInit()
{
    Tcl_MutexLock(&nameMutex);
    if (!initialized) {

	winRootPatternPtr = Tcl_NewStringObj(WIN_ROOT_PATTERN, -1);
	macRootPatternPtr = Tcl_NewStringObj(MAC_ROOT_PATTERN, -1);
	Tcl_CreateExitHandler(FileNameCleanup, NULL);
	initialized = 1;
    }
    Tcl_MutexUnlock(&nameMutex);
}
 
/*
 *----------------------------------------------------------------------
 *
 * FileNameCleanup --
 *
................................................................................
 *----------------------------------------------------------------------
 */

static void
FileNameCleanup(clientData)
    ClientData clientData;	/* Not used. */
{
    Tcl_MutexLock(&nameMutex);
    if (winRootPatternPtr != NULL) {
	Tcl_DecrRefCount(winRootPatternPtr);
        winRootPatternPtr = NULL;
    }
    if (macRootPatternPtr != NULL) {
	Tcl_DecrRefCount(macRootPatternPtr);
        macRootPatternPtr = NULL;
    }
    initialized = 0;
    Tcl_MutexUnlock(&nameMutex);
}
 
/*
 *----------------------------------------------------------------------
 *
 * ExtractWinRoot --
 *
................................................................................
    int offset;			/* Offset in buffer where result should be
				 * stored. */
{
    int length;
    Tcl_RegExp re;
    char *dummy, *tail, *drive, *hostStart, *hostEnd, *shareStart,
	*shareEnd, *lastSlash;


    /*
     * Initialize the path name parser for Windows path names.
     */

    if (!initialized) {
	FileNameInit();
    }

    re = Tcl_GetRegExpFromObj(NULL, winRootPatternPtr, REG_ADVANCED);

    /*
     * Match the root portion of a Windows path name.
     */

    if (!Tcl_RegExpExec(NULL, re, path, path)) {
	return path;
................................................................................
 *----------------------------------------------------------------------
 */

Tcl_PathType
Tcl_GetPathType(path)
    char *path;
{

    Tcl_PathType type = TCL_PATH_ABSOLUTE;
    Tcl_RegExp re;

    switch (tclPlatform) {
   	case TCL_PLATFORM_UNIX:
	    /*
	     * Paths that begin with / or ~ are absolute.
................................................................................
	    }
	    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 (!initialized) {
		    FileNameInit();
		}
		re = Tcl_GetRegExpFromObj(NULL, macRootPatternPtr, REG_ADVANCED);


		if (!Tcl_RegExpExec(NULL, re, path, path)) {
		    type = TCL_PATH_RELATIVE;
		} else {
		    char *unixRoot, *dummy;

		    Tcl_RegExpRange(re, 2, &unixRoot, &dummy);
................................................................................
		    }
		}
	    }
	    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 (!initialized) {
		    FileNameInit();
		}
		re = Tcl_GetRegExpFromObj(NULL, winRootPatternPtr, REG_ADVANCED);


		if (Tcl_RegExpExec(NULL, re, path, path)) {
		    char *drive, *dummy, *unixRoot, *lastSlash;

		    Tcl_RegExpRange(re, 2, &drive, &dummy);
		    Tcl_RegExpRange(re, 5, &unixRoot, &dummy);
		    Tcl_RegExpRange(re, 6, &lastSlash, &dummy);
................................................................................
    CONST 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;
    CONST char *p, *elementStart;
    Tcl_RegExp re;


    /*
     * Initialize the path name parser for Macintosh path names.
     */

    if (!initialized) {
	FileNameInit();
    }

    /*
     * Match the root portion of a Mac path name.
     */

    i = 0;			/* Needed only to prevent gcc warnings. */

    re = Tcl_GetRegExpFromObj(NULL, macRootPatternPtr, REG_ADVANCED);

    if (Tcl_RegExpExec(NULL, re, path, path) == 1) {
	char *start, *end;

	/*
	 * Treat degenerate absolute paths like / and /../.. as
	 * Mac relative file names for lack of anything else to do.







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 *
 * Copyright (c) 1995-1998 Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclFileName.c,v 1.1.2.12 1999/04/05 23:14:26 stanton Exp $
 */

#include "tclInt.h"
#include "tclPort.h"
#include "tclRegexp.h"








/*
 * 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]:)|[/\\\\][/\\\\]+([^/\\\\]+)[/\\\\]+([^/\\\\]+)|([/\\\\]))([/\\\\])*"
................................................................................
#define MAC_ROOT_PATTERN "^((/+([.][.]?/+)*([.][.]?)?)|(~[^:/]*)(/[^:]*)?|(~[^:]*)(:.*)?|/+([.][.]?/+)*([^:/]+)(/[^:]*)?|([^:]+):.*)$"

/*
 * The following variables are used to hold precompiled regular expressions
 * for use in filename matching.
 */

typedef struct ThreadSpecificData {
    int initialized;
    Tcl_Obj *winRootPatternPtr;
    Tcl_Obj *macRootPatternPtr;

} ThreadSpecificData;

static Tcl_ThreadDataKey dataKey;

/*
 * 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;
................................................................................
 */

static char *		DoTildeSubst _ANSI_ARGS_((Tcl_Interp *interp,
			    CONST char *user, Tcl_DString *resultPtr));
static CONST char *	ExtractWinRoot _ANSI_ARGS_((CONST char *path,
			    Tcl_DString *resultPtr, int offset));
static void		FileNameCleanup _ANSI_ARGS_((ClientData clientData));
static void		FileNameInit _ANSI_ARGS_((void));
static int		SkipToChar _ANSI_ARGS_((char **stringPtr,
			    char *match));
static char *		SplitMacPath _ANSI_ARGS_((CONST char *path,
			    Tcl_DString *bufPtr));
static char *		SplitWinPath _ANSI_ARGS_((CONST char *path,
			    Tcl_DString *bufPtr));
static char *		SplitUnixPath _ANSI_ARGS_((CONST char *path,
................................................................................
 *
 *----------------------------------------------------------------------
 */

static void
FileNameInit()
{
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
    if (!tsdPtr->initialized) {
	tsdPtr->initialized = 1;
	tsdPtr->winRootPatternPtr = Tcl_NewStringObj(WIN_ROOT_PATTERN, -1);
	tsdPtr->macRootPatternPtr = Tcl_NewStringObj(MAC_ROOT_PATTERN, -1);
	Tcl_CreateThreadExitHandler(FileNameCleanup, NULL);

    }

}
 
/*
 *----------------------------------------------------------------------
 *
 * FileNameCleanup --
 *
................................................................................
 *----------------------------------------------------------------------
 */

static void
FileNameCleanup(clientData)
    ClientData clientData;	/* Not used. */
{
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);


    Tcl_DecrRefCount(tsdPtr->winRootPatternPtr);



    Tcl_DecrRefCount(tsdPtr->macRootPatternPtr);

    tsdPtr->initialized = 0;

}
 
/*
 *----------------------------------------------------------------------
 *
 * ExtractWinRoot --
 *
................................................................................
    int offset;			/* Offset in buffer where result should be
				 * stored. */
{
    int length;
    Tcl_RegExp re;
    char *dummy, *tail, *drive, *hostStart, *hostEnd, *shareStart,
	*shareEnd, *lastSlash;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    /*
     * Initialize the path name parser for Windows path names.
     */


    FileNameInit();


    re = Tcl_GetRegExpFromObj(NULL, tsdPtr->winRootPatternPtr, REG_ADVANCED);

    /*
     * Match the root portion of a Windows path name.
     */

    if (!Tcl_RegExpExec(NULL, re, path, path)) {
	return path;
................................................................................
 *----------------------------------------------------------------------
 */

Tcl_PathType
Tcl_GetPathType(path)
    char *path;
{
    ThreadSpecificData *tsdPtr;
    Tcl_PathType type = TCL_PATH_ABSOLUTE;
    Tcl_RegExp re;

    switch (tclPlatform) {
   	case TCL_PLATFORM_UNIX:
	    /*
	     * Paths that begin with / or ~ are absolute.
................................................................................
	    }
	    break;

	case TCL_PLATFORM_MAC:
	    if (path[0] == ':') {
		type = TCL_PATH_RELATIVE;
	    } else if (path[0] != '~') {
		tsdPtr = TCL_TSD_INIT(&dataKey);

		/*
		 * Since we have eliminated the easy cases, use the
		 * root pattern to look for the other types.
		 */


		FileNameInit();

		re = Tcl_GetRegExpFromObj(NULL, tsdPtr->macRootPatternPtr,
			REG_ADVANCED);

		if (!Tcl_RegExpExec(NULL, re, path, path)) {
		    type = TCL_PATH_RELATIVE;
		} else {
		    char *unixRoot, *dummy;

		    Tcl_RegExpRange(re, 2, &unixRoot, &dummy);
................................................................................
		    }
		}
	    }
	    break;
	
	case TCL_PLATFORM_WINDOWS:
	    if (path[0] != '~') {
		tsdPtr = TCL_TSD_INIT(&dataKey);

		/*
		 * Since we have eliminated the easy cases, check for
		 * drive relative paths using the regular expression.
		 */


		FileNameInit();

		re = Tcl_GetRegExpFromObj(NULL, tsdPtr->winRootPatternPtr,
			REG_ADVANCED);

		if (Tcl_RegExpExec(NULL, re, path, path)) {
		    char *drive, *dummy, *unixRoot, *lastSlash;

		    Tcl_RegExpRange(re, 2, &drive, &dummy);
		    Tcl_RegExpRange(re, 5, &unixRoot, &dummy);
		    Tcl_RegExpRange(re, 6, &lastSlash, &dummy);
................................................................................
    CONST 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;
    CONST char *p, *elementStart;
    Tcl_RegExp re;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    /*
     * Initialize the path name parser for Macintosh path names.
     */


    FileNameInit();


    /*
     * Match the root portion of a Mac path name.
     */

    i = 0;			/* Needed only to prevent gcc warnings. */

    re = Tcl_GetRegExpFromObj(NULL, tsdPtr->macRootPatternPtr, REG_ADVANCED);

    if (Tcl_RegExpExec(NULL, re, path, path) == 1) {
	char *start, *end;

	/*
	 * Treat degenerate absolute paths like / and /../.. as
	 * Mac relative file names for lack of anything else to do.

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