1/* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1998  Peter Mattis, Spencer Kimball and Josh MacDonald
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 */
19
20/*
21 * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
22 * file for a list of people on the GLib Team.  See the ChangeLog
23 * files for a list of changes.  These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
25 */
26
27/*
28 * MT safe for the unix part, FIXME: make the win32 part MT safe as well.
29 */
30
31#include "config.h"
32
33#ifdef HAVE_UNISTD_H
34#include <unistd.h>
35#endif
36#include <stdarg.h>
37#include <stdlib.h>
38#include <stdio.h>
39#include <locale.h>
40#include <string.h>
41#include <ctype.h>		/* For tolower() */
42#include <errno.h>
43#include <sys/types.h>
44#include <sys/stat.h>
45#ifdef HAVE_PWD_H
46#include <pwd.h>
47#endif
48#include <sys/types.h>
49#ifdef HAVE_SYS_PARAM_H
50#include <sys/param.h>
51#endif
52#ifdef HAVE_CRT_EXTERNS_H
53#include <crt_externs.h> /* for _NSGetEnviron */
54#endif
55
56/* implement gutils's inline functions
57 */
58#define	G_IMPLEMENT_INLINES 1
59#define	__G_UTILS_C__
60#include "glib.h"
61#include "gprintfint.h"
62#include "gthreadprivate.h"
63#include "glibintl.h"
64#include "galias.h"
65
66#ifdef	MAXPATHLEN
67#define	G_PATH_LENGTH	MAXPATHLEN
68#elif	defined (PATH_MAX)
69#define	G_PATH_LENGTH	PATH_MAX
70#elif   defined (_PC_PATH_MAX)
71#define	G_PATH_LENGTH	sysconf(_PC_PATH_MAX)
72#else
73#define G_PATH_LENGTH   2048
74#endif
75
76#ifdef G_PLATFORM_WIN32
77#  define STRICT		/* Strict typing, please */
78#  include <windows.h>
79#  undef STRICT
80#  ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
81#    define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 2
82#    define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 4
83#  endif
84#  include <lmcons.h>		/* For UNLEN */
85#endif /* G_PLATFORM_WIN32 */
86
87#ifdef G_OS_WIN32
88#  include <direct.h>
89#  include <shlobj.h>
90   /* older SDK (e.g. msvc 5.0) does not have these*/
91#  ifndef CSIDL_MYMUSIC
92#    define CSIDL_MYMUSIC 13
93#  endif
94#  ifndef CSIDL_MYVIDEO
95#    define CSIDL_MYVIDEO 14
96#  endif
97#  ifndef CSIDL_INTERNET_CACHE
98#    define CSIDL_INTERNET_CACHE 32
99#  endif
100#  ifndef CSIDL_COMMON_APPDATA
101#    define CSIDL_COMMON_APPDATA 35
102#  endif
103#  ifndef CSIDL_MYPICTURES
104#    define CSIDL_MYPICTURES 0x27
105#  endif
106#  ifndef CSIDL_COMMON_DOCUMENTS
107#    define CSIDL_COMMON_DOCUMENTS 46
108#  endif
109#  ifndef CSIDL_PROFILE
110#    define CSIDL_PROFILE 40
111#  endif
112#  include <process.h>
113#endif
114
115#ifdef HAVE_CARBON
116#include <CoreServices/CoreServices.h>
117#endif
118
119#ifndef ANDROID_STUB
120#ifdef HAVE_CODESET
121#include <langinfo.h>
122#endif
123#endif
124
125const guint glib_major_version = GLIB_MAJOR_VERSION;
126const guint glib_minor_version = GLIB_MINOR_VERSION;
127const guint glib_micro_version = GLIB_MICRO_VERSION;
128const guint glib_interface_age = GLIB_INTERFACE_AGE;
129const guint glib_binary_age = GLIB_BINARY_AGE;
130
131#ifdef G_PLATFORM_WIN32
132
133static HMODULE glib_dll = NULL;
134
135#ifdef DLL_EXPORT
136
137BOOL WINAPI
138DllMain (HINSTANCE hinstDLL,
139	 DWORD     fdwReason,
140	 LPVOID    lpvReserved)
141{
142  if (fdwReason == DLL_PROCESS_ATTACH)
143      glib_dll = hinstDLL;
144
145  return TRUE;
146}
147
148#endif
149
150gchar *
151_glib_get_dll_directory (void)
152{
153  gchar *retval;
154  gchar *p;
155  wchar_t wc_fn[MAX_PATH];
156
157#ifdef DLL_EXPORT
158  if (glib_dll == NULL)
159    return NULL;
160#endif
161
162  /* This code is different from that in
163   * g_win32_get_package_installation_directory_of_module() in that
164   * here we return the actual folder where the GLib DLL is. We don't
165   * do the check for it being in a "bin" or "lib" subfolder and then
166   * returning the parent of that.
167   *
168   * In a statically built GLib, glib_dll will be NULL and we will
169   * thus look up the application's .exe file's location.
170   */
171  if (!GetModuleFileNameW (glib_dll, wc_fn, MAX_PATH))
172    return NULL;
173
174  retval = g_utf16_to_utf8 (wc_fn, -1, NULL, NULL, NULL);
175
176  p = strrchr (retval, G_DIR_SEPARATOR);
177  if (p == NULL)
178    {
179      /* Wtf? */
180      return NULL;
181    }
182  *p = '\0';
183
184  return retval;
185}
186
187#endif
188
189/**
190 * glib_check_version:
191 * @required_major: the required major version.
192 * @required_minor: the required minor version.
193 * @required_micro: the required micro version.
194 *
195 * Checks that the GLib library in use is compatible with the
196 * given version. Generally you would pass in the constants
197 * #GLIB_MAJOR_VERSION, #GLIB_MINOR_VERSION, #GLIB_MICRO_VERSION
198 * as the three arguments to this function; that produces
199 * a check that the library in use is compatible with
200 * the version of GLib the application or module was compiled
201 * against.
202 *
203 * Compatibility is defined by two things: first the version
204 * of the running library is newer than the version
205 * @required_major.required_minor.@required_micro. Second
206 * the running library must be binary compatible with the
207 * version @required_major.required_minor.@required_micro
208 * (same major version.)
209 *
210 * Return value: %NULL if the GLib library is compatible with the
211 *   given version, or a string describing the version mismatch.
212 *   The returned string is owned by GLib and must not be modified
213 *   or freed.
214 *
215 * Since: 2.6
216 **/
217const gchar *
218glib_check_version (guint required_major,
219                    guint required_minor,
220                    guint required_micro)
221{
222  gint glib_effective_micro = 100 * GLIB_MINOR_VERSION + GLIB_MICRO_VERSION;
223  gint required_effective_micro = 100 * required_minor + required_micro;
224
225  if (required_major > GLIB_MAJOR_VERSION)
226    return "GLib version too old (major mismatch)";
227  if (required_major < GLIB_MAJOR_VERSION)
228    return "GLib version too new (major mismatch)";
229  if (required_effective_micro < glib_effective_micro - GLIB_BINARY_AGE)
230    return "GLib version too new (micro mismatch)";
231  if (required_effective_micro > glib_effective_micro)
232    return "GLib version too old (micro mismatch)";
233  return NULL;
234}
235
236#if !defined (HAVE_MEMMOVE) && !defined (HAVE_WORKING_BCOPY)
237/**
238 * g_memmove:
239 * @dest: the destination address to copy the bytes to.
240 * @src: the source address to copy the bytes from.
241 * @len: the number of bytes to copy.
242 *
243 * Copies a block of memory @len bytes long, from @src to @dest.
244 * The source and destination areas may overlap.
245 *
246 * In order to use this function, you must include
247 * <filename>string.h</filename> yourself, because this macro will
248 * typically simply resolve to memmove() and GLib does not include
249 * <filename>string.h</filename> for you.
250 */
251void
252g_memmove (gpointer      dest,
253	   gconstpointer src,
254	   gulong        len)
255{
256  gchar* destptr = dest;
257  const gchar* srcptr = src;
258  if (src + len < dest || dest + len < src)
259    {
260      bcopy (src, dest, len);
261      return;
262    }
263  else if (dest <= src)
264    {
265      while (len--)
266	*(destptr++) = *(srcptr++);
267    }
268  else
269    {
270      destptr += len;
271      srcptr += len;
272      while (len--)
273	*(--destptr) = *(--srcptr);
274    }
275}
276#endif /* !HAVE_MEMMOVE && !HAVE_WORKING_BCOPY */
277
278#ifdef G_OS_WIN32
279#undef g_atexit
280#endif
281
282/**
283 * g_atexit:
284 * @func: the function to call on normal program termination.
285 *
286 * Specifies a function to be called at normal program termination.
287 *
288 * Since GLib 2.8.2, on Windows g_atexit() actually is a preprocessor
289 * macro that maps to a call to the atexit() function in the C
290 * library. This means that in case the code that calls g_atexit(),
291 * i.e. atexit(), is in a DLL, the function will be called when the
292 * DLL is detached from the program. This typically makes more sense
293 * than that the function is called when the GLib DLL is detached,
294 * which happened earlier when g_atexit() was a function in the GLib
295 * DLL.
296 *
297 * The behaviour of atexit() in the context of dynamically loaded
298 * modules is not formally specified and varies wildly.
299 *
300 * On POSIX systems, calling g_atexit() (or atexit()) in a dynamically
301 * loaded module which is unloaded before the program terminates might
302 * well cause a crash at program exit.
303 *
304 * Some POSIX systems implement atexit() like Windows, and have each
305 * dynamically loaded module maintain an own atexit chain that is
306 * called when the module is unloaded.
307 *
308 * On other POSIX systems, before a dynamically loaded module is
309 * unloaded, the registered atexit functions (if any) residing in that
310 * module are called, regardless where the code that registered them
311 * resided. This is presumably the most robust approach.
312 *
313 * As can be seen from the above, for portability it's best to avoid
314 * calling g_atexit() (or atexit()) except in the main executable of a
315 * program.
316 */
317void
318g_atexit (GVoidFunc func)
319{
320  gint result;
321  const gchar *error = NULL;
322
323  /* keep this in sync with glib.h */
324
325#ifdef	G_NATIVE_ATEXIT
326  result = ATEXIT (func);
327  if (result)
328    error = g_strerror (errno);
329#elif defined (HAVE_ATEXIT)
330#  ifdef NeXT /* @#%@! NeXTStep */
331  result = !atexit ((void (*)(void)) func);
332  if (result)
333    error = g_strerror (errno);
334#  else
335  result = atexit ((void (*)(void)) func);
336  if (result)
337    error = g_strerror (errno);
338#  endif /* NeXT */
339#elif defined (HAVE_ON_EXIT)
340  result = on_exit ((void (*)(int, void *)) func, NULL);
341  if (result)
342    error = g_strerror (errno);
343#else
344  result = 0;
345  error = "no implementation";
346#endif /* G_NATIVE_ATEXIT */
347
348  if (error)
349    g_error ("Could not register atexit() function: %s", error);
350}
351
352/* Based on execvp() from GNU Libc.
353 * Some of this code is cut-and-pasted into gspawn.c
354 */
355
356static gchar*
357my_strchrnul (const gchar *str,
358	      gchar        c)
359{
360  gchar *p = (gchar*)str;
361  while (*p && (*p != c))
362    ++p;
363
364  return p;
365}
366
367#ifdef G_OS_WIN32
368
369static gchar *inner_find_program_in_path (const gchar *program);
370
371gchar*
372g_find_program_in_path (const gchar *program)
373{
374  const gchar *last_dot = strrchr (program, '.');
375
376  if (last_dot == NULL ||
377      strchr (last_dot, '\\') != NULL ||
378      strchr (last_dot, '/') != NULL)
379    {
380      const gint program_length = strlen (program);
381      gchar *pathext = g_build_path (";",
382				     ".exe;.cmd;.bat;.com",
383				     g_getenv ("PATHEXT"),
384				     NULL);
385      gchar *p;
386      gchar *decorated_program;
387      gchar *retval;
388
389      p = pathext;
390      do
391	{
392	  gchar *q = my_strchrnul (p, ';');
393
394	  decorated_program = g_malloc (program_length + (q-p) + 1);
395	  memcpy (decorated_program, program, program_length);
396	  memcpy (decorated_program+program_length, p, q-p);
397	  decorated_program [program_length + (q-p)] = '\0';
398
399	  retval = inner_find_program_in_path (decorated_program);
400	  g_free (decorated_program);
401
402	  if (retval != NULL)
403	    {
404	      g_free (pathext);
405	      return retval;
406	    }
407	  p = q;
408	} while (*p++ != '\0');
409      g_free (pathext);
410      return NULL;
411    }
412  else
413    return inner_find_program_in_path (program);
414}
415
416#endif
417
418/**
419 * g_find_program_in_path:
420 * @program: a program name in the GLib file name encoding
421 *
422 * Locates the first executable named @program in the user's path, in the
423 * same way that execvp() would locate it. Returns an allocated string
424 * with the absolute path name, or %NULL if the program is not found in
425 * the path. If @program is already an absolute path, returns a copy of
426 * @program if @program exists and is executable, and %NULL otherwise.
427 *
428 * On Windows, if @program does not have a file type suffix, tries
429 * with the suffixes .exe, .cmd, .bat and .com, and the suffixes in
430 * the <envar>PATHEXT</envar> environment variable.
431 *
432 * On Windows, it looks for the file in the same way as CreateProcess()
433 * would. This means first in the directory where the executing
434 * program was loaded from, then in the current directory, then in the
435 * Windows 32-bit system directory, then in the Windows directory, and
436 * finally in the directories in the <envar>PATH</envar> environment
437 * variable. If the program is found, the return value contains the
438 * full name including the type suffix.
439 *
440 * Return value: absolute path, or %NULL
441 **/
442#ifdef G_OS_WIN32
443static gchar *
444inner_find_program_in_path (const gchar *program)
445#else
446gchar*
447g_find_program_in_path (const gchar *program)
448#endif
449{
450  const gchar *path, *p;
451  gchar *name, *freeme;
452#ifdef G_OS_WIN32
453  const gchar *path_copy;
454  gchar *filename = NULL, *appdir = NULL;
455  gchar *sysdir = NULL, *windir = NULL;
456  int n;
457  wchar_t wfilename[MAXPATHLEN], wsysdir[MAXPATHLEN],
458    wwindir[MAXPATHLEN];
459#endif
460  gsize len;
461  gsize pathlen;
462
463  g_return_val_if_fail (program != NULL, NULL);
464
465  /* If it is an absolute path, or a relative path including subdirectories,
466   * don't look in PATH.
467   */
468  if (g_path_is_absolute (program)
469      || strchr (program, G_DIR_SEPARATOR) != NULL
470#ifdef G_OS_WIN32
471      || strchr (program, '/') != NULL
472#endif
473      )
474    {
475      if (g_file_test (program, G_FILE_TEST_IS_EXECUTABLE) &&
476	  !g_file_test (program, G_FILE_TEST_IS_DIR))
477        return g_strdup (program);
478      else
479        return NULL;
480    }
481
482  path = g_getenv ("PATH");
483#if defined(G_OS_UNIX) || defined(G_OS_BEOS)
484  if (path == NULL)
485    {
486      /* There is no `PATH' in the environment.  The default
487       * search path in GNU libc is the current directory followed by
488       * the path `confstr' returns for `_CS_PATH'.
489       */
490
491      /* In GLib we put . last, for security, and don't use the
492       * unportable confstr(); UNIX98 does not actually specify
493       * what to search if PATH is unset. POSIX may, dunno.
494       */
495
496      path = "/bin:/usr/bin:.";
497    }
498#else
499  n = GetModuleFileNameW (NULL, wfilename, MAXPATHLEN);
500  if (n > 0 && n < MAXPATHLEN)
501    filename = g_utf16_to_utf8 (wfilename, -1, NULL, NULL, NULL);
502
503  n = GetSystemDirectoryW (wsysdir, MAXPATHLEN);
504  if (n > 0 && n < MAXPATHLEN)
505    sysdir = g_utf16_to_utf8 (wsysdir, -1, NULL, NULL, NULL);
506
507  n = GetWindowsDirectoryW (wwindir, MAXPATHLEN);
508  if (n > 0 && n < MAXPATHLEN)
509    windir = g_utf16_to_utf8 (wwindir, -1, NULL, NULL, NULL);
510
511  if (filename)
512    {
513      appdir = g_path_get_dirname (filename);
514      g_free (filename);
515    }
516
517  path = g_strdup (path);
518
519  if (windir)
520    {
521      const gchar *tem = path;
522      path = g_strconcat (windir, ";", path, NULL);
523      g_free ((gchar *) tem);
524      g_free (windir);
525    }
526
527  if (sysdir)
528    {
529      const gchar *tem = path;
530      path = g_strconcat (sysdir, ";", path, NULL);
531      g_free ((gchar *) tem);
532      g_free (sysdir);
533    }
534
535  {
536    const gchar *tem = path;
537    path = g_strconcat (".;", path, NULL);
538    g_free ((gchar *) tem);
539  }
540
541  if (appdir)
542    {
543      const gchar *tem = path;
544      path = g_strconcat (appdir, ";", path, NULL);
545      g_free ((gchar *) tem);
546      g_free (appdir);
547    }
548
549  path_copy = path;
550#endif
551
552  len = strlen (program) + 1;
553  pathlen = strlen (path);
554  freeme = name = g_malloc (pathlen + len + 1);
555
556  /* Copy the file name at the top, including '\0'  */
557  memcpy (name + pathlen + 1, program, len);
558  name = name + pathlen;
559  /* And add the slash before the filename  */
560  *name = G_DIR_SEPARATOR;
561
562  p = path;
563  do
564    {
565      char *startp;
566
567      path = p;
568      p = my_strchrnul (path, G_SEARCHPATH_SEPARATOR);
569
570      if (p == path)
571        /* Two adjacent colons, or a colon at the beginning or the end
572         * of `PATH' means to search the current directory.
573         */
574        startp = name + 1;
575      else
576        startp = memcpy (name - (p - path), path, p - path);
577
578      if (g_file_test (startp, G_FILE_TEST_IS_EXECUTABLE) &&
579	  !g_file_test (startp, G_FILE_TEST_IS_DIR))
580        {
581          gchar *ret;
582          ret = g_strdup (startp);
583          g_free (freeme);
584#ifdef G_OS_WIN32
585	  g_free ((gchar *) path_copy);
586#endif
587          return ret;
588        }
589    }
590  while (*p++ != '\0');
591
592  g_free (freeme);
593#ifdef G_OS_WIN32
594  g_free ((gchar *) path_copy);
595#endif
596
597  return NULL;
598}
599
600static gboolean
601debug_key_matches (const gchar *key,
602		   const gchar *token,
603		   guint        length)
604{
605  for (; length; length--, key++, token++)
606    {
607      char k = (*key   == '_') ? '-' : tolower (*key  );
608      char t = (*token == '_') ? '-' : tolower (*token);
609
610      if (k != t)
611        return FALSE;
612    }
613
614  return *key == '\0';
615}
616
617/**
618 * g_parse_debug_string:
619 * @string: a list of debug options separated by colons, spaces, or
620 * commas, or %NULL.
621 * @keys: pointer to an array of #GDebugKey which associate
622 *     strings with bit flags.
623 * @nkeys: the number of #GDebugKey<!-- -->s in the array.
624 *
625 * Parses a string containing debugging options
626 * into a %guint containing bit flags. This is used
627 * within GDK and GTK+ to parse the debug options passed on the
628 * command line or through environment variables.
629 *
630 * If @string is equal to "all", all flags are set.  If @string
631 * is equal to "help", all the available keys in @keys are printed
632 * out to standard error.
633 *
634 * Returns: the combined set of bit flags.
635 */
636guint
637g_parse_debug_string  (const gchar     *string,
638		       const GDebugKey *keys,
639		       guint	        nkeys)
640{
641  guint i;
642  guint result = 0;
643
644  if (string == NULL)
645    return 0;
646
647  /* this function is used by gmem.c/gslice.c initialization code,
648   * so introducing malloc dependencies here would require adaptions
649   * of those code portions.
650   */
651
652  if (!g_ascii_strcasecmp (string, "all"))
653    {
654      for (i=0; i<nkeys; i++)
655	result |= keys[i].value;
656    }
657  else if (!g_ascii_strcasecmp (string, "help"))
658    {
659      /* using stdio directly for the reason stated above */
660      fprintf (stderr, "Supported debug values: ");
661      for (i=0; i<nkeys; i++)
662	fprintf (stderr, " %s", keys[i].key);
663      fprintf (stderr, "\n");
664    }
665  else
666    {
667      const gchar *p = string;
668      const gchar *q;
669
670      while (*p)
671	{
672	  q = strpbrk (p, ":;, \t");
673	  if (!q)
674	    q = p + strlen(p);
675
676	  for (i = 0; i < nkeys; i++)
677	    if (debug_key_matches (keys[i].key, p, q - p))
678	      result |= keys[i].value;
679
680	  p = q;
681	  if (*p)
682	    p++;
683	}
684    }
685
686  return result;
687}
688
689/**
690 * g_basename:
691 * @file_name: the name of the file.
692 *
693 * Gets the name of the file without any leading directory components.
694 * It returns a pointer into the given file name string.
695 *
696 * Return value: the name of the file without any leading directory components.
697 *
698 * Deprecated:2.2: Use g_path_get_basename() instead, but notice that
699 * g_path_get_basename() allocates new memory for the returned string, unlike
700 * this function which returns a pointer into the argument.
701 **/
702G_CONST_RETURN gchar*
703g_basename (const gchar	   *file_name)
704{
705  register gchar *base;
706
707  g_return_val_if_fail (file_name != NULL, NULL);
708
709  base = strrchr (file_name, G_DIR_SEPARATOR);
710
711#ifdef G_OS_WIN32
712  {
713    gchar *q = strrchr (file_name, '/');
714    if (base == NULL || (q != NULL && q > base))
715	base = q;
716  }
717#endif
718
719  if (base)
720    return base + 1;
721
722#ifdef G_OS_WIN32
723  if (g_ascii_isalpha (file_name[0]) && file_name[1] == ':')
724    return (gchar*) file_name + 2;
725#endif /* G_OS_WIN32 */
726
727  return (gchar*) file_name;
728}
729
730/**
731 * g_path_get_basename:
732 * @file_name: the name of the file.
733 *
734 * Gets the last component of the filename. If @file_name ends with a
735 * directory separator it gets the component before the last slash. If
736 * @file_name consists only of directory separators (and on Windows,
737 * possibly a drive letter), a single separator is returned. If
738 * @file_name is empty, it gets ".".
739 *
740 * Return value: a newly allocated string containing the last component of
741 *   the filename.
742 */
743gchar*
744g_path_get_basename (const gchar   *file_name)
745{
746  register gssize base;
747  register gssize last_nonslash;
748  gsize len;
749  gchar *retval;
750
751  g_return_val_if_fail (file_name != NULL, NULL);
752
753  if (file_name[0] == '\0')
754    /* empty string */
755    return g_strdup (".");
756
757  last_nonslash = strlen (file_name) - 1;
758
759  while (last_nonslash >= 0 && G_IS_DIR_SEPARATOR (file_name [last_nonslash]))
760    last_nonslash--;
761
762  if (last_nonslash == -1)
763    /* string only containing slashes */
764    return g_strdup (G_DIR_SEPARATOR_S);
765
766#ifdef G_OS_WIN32
767  if (last_nonslash == 1 && g_ascii_isalpha (file_name[0]) && file_name[1] == ':')
768    /* string only containing slashes and a drive */
769    return g_strdup (G_DIR_SEPARATOR_S);
770#endif /* G_OS_WIN32 */
771
772  base = last_nonslash;
773
774  while (base >=0 && !G_IS_DIR_SEPARATOR (file_name [base]))
775    base--;
776
777#ifdef G_OS_WIN32
778  if (base == -1 && g_ascii_isalpha (file_name[0]) && file_name[1] == ':')
779    base = 1;
780#endif /* G_OS_WIN32 */
781
782  len = last_nonslash - base;
783  retval = g_malloc (len + 1);
784  memcpy (retval, file_name + base + 1, len);
785  retval [len] = '\0';
786  return retval;
787}
788
789/**
790 * g_path_is_absolute:
791 * @file_name: a file name.
792 *
793 * Returns %TRUE if the given @file_name is an absolute file name,
794 * i.e. it contains a full path from the root directory such as "/usr/local"
795 * on UNIX or "C:\windows" on Windows systems.
796 *
797 * Returns: %TRUE if @file_name is an absolute path.
798 */
799gboolean
800g_path_is_absolute (const gchar *file_name)
801{
802  g_return_val_if_fail (file_name != NULL, FALSE);
803
804  if (G_IS_DIR_SEPARATOR (file_name[0]))
805    return TRUE;
806
807#ifdef G_OS_WIN32
808  /* Recognize drive letter on native Windows */
809  if (g_ascii_isalpha (file_name[0]) &&
810      file_name[1] == ':' && G_IS_DIR_SEPARATOR (file_name[2]))
811    return TRUE;
812#endif /* G_OS_WIN32 */
813
814  return FALSE;
815}
816
817/**
818 * g_path_skip_root:
819 * @file_name: a file name.
820 *
821 * Returns a pointer into @file_name after the root component, i.e. after
822 * the "/" in UNIX or "C:\" under Windows. If @file_name is not an absolute
823 * path it returns %NULL.
824 *
825 * Returns: a pointer into @file_name after the root component.
826 */
827G_CONST_RETURN gchar*
828g_path_skip_root (const gchar *file_name)
829{
830  g_return_val_if_fail (file_name != NULL, NULL);
831
832#ifdef G_PLATFORM_WIN32
833  /* Skip \\server\share or //server/share */
834  if (G_IS_DIR_SEPARATOR (file_name[0]) &&
835      G_IS_DIR_SEPARATOR (file_name[1]) &&
836      file_name[2] &&
837      !G_IS_DIR_SEPARATOR (file_name[2]))
838    {
839      gchar *p;
840
841      p = strchr (file_name + 2, G_DIR_SEPARATOR);
842#ifdef G_OS_WIN32
843      {
844	gchar *q = strchr (file_name + 2, '/');
845	if (p == NULL || (q != NULL && q < p))
846	  p = q;
847      }
848#endif
849      if (p &&
850	  p > file_name + 2 &&
851	  p[1])
852	{
853	  file_name = p + 1;
854
855	  while (file_name[0] && !G_IS_DIR_SEPARATOR (file_name[0]))
856	    file_name++;
857
858	  /* Possibly skip a backslash after the share name */
859	  if (G_IS_DIR_SEPARATOR (file_name[0]))
860	    file_name++;
861
862	  return (gchar *)file_name;
863	}
864    }
865#endif
866
867  /* Skip initial slashes */
868  if (G_IS_DIR_SEPARATOR (file_name[0]))
869    {
870      while (G_IS_DIR_SEPARATOR (file_name[0]))
871	file_name++;
872      return (gchar *)file_name;
873    }
874
875#ifdef G_OS_WIN32
876  /* Skip X:\ */
877  if (g_ascii_isalpha (file_name[0]) && file_name[1] == ':' && G_IS_DIR_SEPARATOR (file_name[2]))
878    return (gchar *)file_name + 3;
879#endif
880
881  return NULL;
882}
883
884/**
885 * g_path_get_dirname:
886 * @file_name: the name of the file.
887 *
888 * Gets the directory components of a file name.  If the file name has no
889 * directory components "." is returned.  The returned string should be
890 * freed when no longer needed.
891 *
892 * Returns: the directory components of the file.
893 */
894gchar*
895g_path_get_dirname (const gchar	   *file_name)
896{
897  register gchar *base;
898  register gsize len;
899
900  g_return_val_if_fail (file_name != NULL, NULL);
901
902  base = strrchr (file_name, G_DIR_SEPARATOR);
903#ifdef G_OS_WIN32
904  {
905    gchar *q = strrchr (file_name, '/');
906    if (base == NULL || (q != NULL && q > base))
907	base = q;
908  }
909#endif
910  if (!base)
911    {
912#ifdef G_OS_WIN32
913      if (g_ascii_isalpha (file_name[0]) && file_name[1] == ':')
914	{
915	  gchar drive_colon_dot[4];
916
917	  drive_colon_dot[0] = file_name[0];
918	  drive_colon_dot[1] = ':';
919	  drive_colon_dot[2] = '.';
920	  drive_colon_dot[3] = '\0';
921
922	  return g_strdup (drive_colon_dot);
923	}
924#endif
925    return g_strdup (".");
926    }
927
928  while (base > file_name && G_IS_DIR_SEPARATOR (*base))
929    base--;
930
931#ifdef G_OS_WIN32
932  /* base points to the char before the last slash.
933   *
934   * In case file_name is the root of a drive (X:\) or a child of the
935   * root of a drive (X:\foo), include the slash.
936   *
937   * In case file_name is the root share of an UNC path
938   * (\\server\share), add a slash, returning \\server\share\ .
939   *
940   * In case file_name is a direct child of a share in an UNC path
941   * (\\server\share\foo), include the slash after the share name,
942   * returning \\server\share\ .
943   */
944  if (base == file_name + 1 && g_ascii_isalpha (file_name[0]) && file_name[1] == ':')
945    base++;
946  else if (G_IS_DIR_SEPARATOR (file_name[0]) &&
947	   G_IS_DIR_SEPARATOR (file_name[1]) &&
948	   file_name[2] &&
949	   !G_IS_DIR_SEPARATOR (file_name[2]) &&
950	   base >= file_name + 2)
951    {
952      const gchar *p = file_name + 2;
953      while (*p && !G_IS_DIR_SEPARATOR (*p))
954	p++;
955      if (p == base + 1)
956	{
957	  len = (guint) strlen (file_name) + 1;
958	  base = g_new (gchar, len + 1);
959	  strcpy (base, file_name);
960	  base[len-1] = G_DIR_SEPARATOR;
961	  base[len] = 0;
962	  return base;
963	}
964      if (G_IS_DIR_SEPARATOR (*p))
965	{
966	  p++;
967	  while (*p && !G_IS_DIR_SEPARATOR (*p))
968	    p++;
969	  if (p == base + 1)
970	    base++;
971	}
972    }
973#endif
974
975  len = (guint) 1 + base - file_name;
976
977  base = g_new (gchar, len + 1);
978  g_memmove (base, file_name, len);
979  base[len] = 0;
980
981  return base;
982}
983
984/**
985 * g_get_current_dir:
986 *
987 * Gets the current directory.
988 * The returned string should be freed when no longer needed. The encoding
989 * of the returned string is system defined. On Windows, it is always UTF-8.
990 *
991 * Returns: the current directory.
992 */
993gchar*
994g_get_current_dir (void)
995{
996#ifdef G_OS_WIN32
997
998  gchar *dir = NULL;
999  wchar_t dummy[2], *wdir;
1000  int len;
1001
1002  len = GetCurrentDirectoryW (2, dummy);
1003  wdir = g_new (wchar_t, len);
1004
1005  if (GetCurrentDirectoryW (len, wdir) == len - 1)
1006    dir = g_utf16_to_utf8 (wdir, -1, NULL, NULL, NULL);
1007
1008  g_free (wdir);
1009
1010  if (dir == NULL)
1011    dir = g_strdup ("\\");
1012
1013  return dir;
1014
1015#else
1016
1017  gchar *buffer = NULL;
1018  gchar *dir = NULL;
1019  static gulong max_len = 0;
1020
1021  if (max_len == 0)
1022    max_len = (G_PATH_LENGTH == -1) ? 2048 : G_PATH_LENGTH;
1023
1024  /* We don't use getcwd(3) on SUNOS, because, it does a popen("pwd")
1025   * and, if that wasn't bad enough, hangs in doing so.
1026   */
1027#if	(defined (sun) && !defined (__SVR4)) || !defined(HAVE_GETCWD)
1028  buffer = g_new (gchar, max_len + 1);
1029  *buffer = 0;
1030  dir = getwd (buffer);
1031#else	/* !sun || !HAVE_GETCWD */
1032  while (max_len < G_MAXULONG / 2)
1033    {
1034      g_free (buffer);
1035      buffer = g_new (gchar, max_len + 1);
1036      *buffer = 0;
1037      dir = getcwd (buffer, max_len);
1038
1039      if (dir || errno != ERANGE)
1040	break;
1041
1042      max_len *= 2;
1043    }
1044#endif	/* !sun || !HAVE_GETCWD */
1045
1046  if (!dir || !*buffer)
1047    {
1048      /* hm, should we g_error() out here?
1049       * this can happen if e.g. "./" has mode \0000
1050       */
1051      buffer[0] = G_DIR_SEPARATOR;
1052      buffer[1] = 0;
1053    }
1054
1055  dir = g_strdup (buffer);
1056  g_free (buffer);
1057
1058  return dir;
1059#endif /* !Win32 */
1060}
1061
1062/**
1063 * g_getenv:
1064 * @variable: the environment variable to get, in the GLib file name encoding.
1065 *
1066 * Returns the value of an environment variable. The name and value
1067 * are in the GLib file name encoding. On UNIX, this means the actual
1068 * bytes which might or might not be in some consistent character set
1069 * and encoding. On Windows, it is in UTF-8. On Windows, in case the
1070 * environment variable's value contains references to other
1071 * environment variables, they are expanded.
1072 *
1073 * Return value: the value of the environment variable, or %NULL if
1074 * the environment variable is not found. The returned string may be
1075 * overwritten by the next call to g_getenv(), g_setenv() or
1076 * g_unsetenv().
1077 **/
1078G_CONST_RETURN gchar*
1079g_getenv (const gchar *variable)
1080{
1081#ifndef G_OS_WIN32
1082
1083  g_return_val_if_fail (variable != NULL, NULL);
1084
1085  return getenv (variable);
1086
1087#else /* G_OS_WIN32 */
1088
1089  GQuark quark;
1090  gchar *value;
1091  wchar_t dummy[2], *wname, *wvalue;
1092  int len;
1093
1094  g_return_val_if_fail (variable != NULL, NULL);
1095  g_return_val_if_fail (g_utf8_validate (variable, -1, NULL), NULL);
1096
1097  /* On Windows NT, it is relatively typical that environment
1098   * variables contain references to other environment variables. If
1099   * so, use ExpandEnvironmentStrings(). (In an ideal world, such
1100   * environment variables would be stored in the Registry as
1101   * REG_EXPAND_SZ type values, and would then get automatically
1102   * expanded before a program sees them. But there is broken software
1103   * that stores environment variables as REG_SZ values even if they
1104   * contain references to other environment variables.)
1105   */
1106
1107  wname = g_utf8_to_utf16 (variable, -1, NULL, NULL, NULL);
1108
1109  len = GetEnvironmentVariableW (wname, dummy, 2);
1110
1111  if (len == 0)
1112    {
1113      g_free (wname);
1114      return NULL;
1115    }
1116  else if (len == 1)
1117    len = 2;
1118
1119  wvalue = g_new (wchar_t, len);
1120
1121  if (GetEnvironmentVariableW (wname, wvalue, len) != len - 1)
1122    {
1123      g_free (wname);
1124      g_free (wvalue);
1125      return NULL;
1126    }
1127
1128  if (wcschr (wvalue, L'%') != NULL)
1129    {
1130      wchar_t *tem = wvalue;
1131
1132      len = ExpandEnvironmentStringsW (wvalue, dummy, 2);
1133
1134      if (len > 0)
1135	{
1136	  wvalue = g_new (wchar_t, len);
1137
1138	  if (ExpandEnvironmentStringsW (tem, wvalue, len) != len)
1139	    {
1140	      g_free (wvalue);
1141	      wvalue = tem;
1142	    }
1143	  else
1144	    g_free (tem);
1145	}
1146    }
1147
1148  value = g_utf16_to_utf8 (wvalue, -1, NULL, NULL, NULL);
1149
1150  g_free (wname);
1151  g_free (wvalue);
1152
1153  quark = g_quark_from_string (value);
1154  g_free (value);
1155
1156  return g_quark_to_string (quark);
1157
1158#endif /* G_OS_WIN32 */
1159}
1160
1161/* _g_getenv_nomalloc
1162 * this function does a getenv() without doing any kind of allocation
1163 * through glib. it's suitable for chars <= 127 only (both, for the
1164 * variable name and the contents) and for contents < 1024 chars in
1165 * length. also, it aliases "" to a NULL return value.
1166 **/
1167const gchar*
1168_g_getenv_nomalloc (const gchar *variable,
1169                    gchar        buffer[1024])
1170{
1171  const gchar *retval = getenv (variable);
1172  if (retval && retval[0])
1173    {
1174      gint l = strlen (retval);
1175      if (l < 1024)
1176        {
1177          strncpy (buffer, retval, l);
1178          buffer[l] = 0;
1179          return buffer;
1180        }
1181    }
1182  return NULL;
1183}
1184
1185/**
1186 * g_setenv:
1187 * @variable: the environment variable to set, must not contain '='.
1188 * @value: the value for to set the variable to.
1189 * @overwrite: whether to change the variable if it already exists.
1190 *
1191 * Sets an environment variable. Both the variable's name and value
1192 * should be in the GLib file name encoding. On UNIX, this means that
1193 * they can be any sequence of bytes. On Windows, they should be in
1194 * UTF-8.
1195 *
1196 * Note that on some systems, when variables are overwritten, the memory
1197 * used for the previous variables and its value isn't reclaimed.
1198 *
1199 * Returns: %FALSE if the environment variable couldn't be set.
1200 *
1201 * Since: 2.4
1202 */
1203gboolean
1204g_setenv (const gchar *variable,
1205	  const gchar *value,
1206	  gboolean     overwrite)
1207{
1208#ifndef G_OS_WIN32
1209
1210  gint result;
1211#ifndef HAVE_SETENV
1212  gchar *string;
1213#endif
1214
1215  g_return_val_if_fail (variable != NULL, FALSE);
1216  g_return_val_if_fail (strchr (variable, '=') == NULL, FALSE);
1217
1218#ifdef HAVE_SETENV
1219  result = setenv (variable, value, overwrite);
1220#else
1221  if (!overwrite && getenv (variable) != NULL)
1222    return TRUE;
1223
1224  /* This results in a leak when you overwrite existing
1225   * settings. It would be fairly easy to fix this by keeping
1226   * our own parallel array or hash table.
1227   */
1228  string = g_strconcat (variable, "=", value, NULL);
1229  result = putenv (string);
1230#endif
1231  return result == 0;
1232
1233#else /* G_OS_WIN32 */
1234
1235  gboolean retval;
1236  wchar_t *wname, *wvalue, *wassignment;
1237  gchar *tem;
1238
1239  g_return_val_if_fail (variable != NULL, FALSE);
1240  g_return_val_if_fail (strchr (variable, '=') == NULL, FALSE);
1241  g_return_val_if_fail (g_utf8_validate (variable, -1, NULL), FALSE);
1242  g_return_val_if_fail (g_utf8_validate (value, -1, NULL), FALSE);
1243
1244  if (!overwrite && g_getenv (variable) != NULL)
1245    return TRUE;
1246
1247  /* We want to (if possible) set both the environment variable copy
1248   * kept by the C runtime and the one kept by the system.
1249   *
1250   * We can't use only the C runtime's putenv or _wputenv() as that
1251   * won't work for arbitrary Unicode strings in a "non-Unicode" app
1252   * (with main() and not wmain()). In a "main()" app the C runtime
1253   * initializes the C runtime's environment table by converting the
1254   * real (wide char) environment variables to system codepage, thus
1255   * breaking those that aren't representable in the system codepage.
1256   *
1257   * As the C runtime's putenv() will also set the system copy, we do
1258   * the putenv() first, then call SetEnvironmentValueW ourselves.
1259   */
1260
1261  wname = g_utf8_to_utf16 (variable, -1, NULL, NULL, NULL);
1262  wvalue = g_utf8_to_utf16 (value, -1, NULL, NULL, NULL);
1263  tem = g_strconcat (variable, "=", value, NULL);
1264  wassignment = g_utf8_to_utf16 (tem, -1, NULL, NULL, NULL);
1265
1266  g_free (tem);
1267  _wputenv (wassignment);
1268  g_free (wassignment);
1269
1270  retval = (SetEnvironmentVariableW (wname, wvalue) != 0);
1271
1272  g_free (wname);
1273  g_free (wvalue);
1274
1275  return retval;
1276
1277#endif /* G_OS_WIN32 */
1278}
1279
1280#ifdef HAVE__NSGETENVIRON
1281#define environ (*_NSGetEnviron())
1282#elif !defined(G_OS_WIN32)
1283
1284/* According to the Single Unix Specification, environ is not in
1285 * any system header, although unistd.h often declares it.
1286 */
1287extern char **environ;
1288#endif
1289
1290/**
1291 * g_unsetenv:
1292 * @variable: the environment variable to remove, must not contain '='.
1293 *
1294 * Removes an environment variable from the environment.
1295 *
1296 * Note that on some systems, when variables are overwritten, the memory
1297 * used for the previous variables and its value isn't reclaimed.
1298 * Furthermore, this function can't be guaranteed to operate in a
1299 * threadsafe way.
1300 *
1301 * Since: 2.4
1302 **/
1303void
1304g_unsetenv (const gchar *variable)
1305{
1306#ifndef G_OS_WIN32
1307
1308#ifdef HAVE_UNSETENV
1309  g_return_if_fail (variable != NULL);
1310  g_return_if_fail (strchr (variable, '=') == NULL);
1311
1312  unsetenv (variable);
1313#else /* !HAVE_UNSETENV */
1314  int len;
1315  gchar **e, **f;
1316
1317  g_return_if_fail (variable != NULL);
1318  g_return_if_fail (strchr (variable, '=') == NULL);
1319
1320  len = strlen (variable);
1321
1322  /* Mess directly with the environ array.
1323   * This seems to be the only portable way to do this.
1324   *
1325   * Note that we remove *all* environment entries for
1326   * the variable name, not just the first.
1327   */
1328  e = f = environ;
1329  while (*e != NULL)
1330    {
1331      if (strncmp (*e, variable, len) != 0 || (*e)[len] != '=')
1332	{
1333	  *f = *e;
1334	  f++;
1335	}
1336      e++;
1337    }
1338  *f = NULL;
1339#endif /* !HAVE_UNSETENV */
1340
1341#else  /* G_OS_WIN32 */
1342
1343  wchar_t *wname, *wassignment;
1344  gchar *tem;
1345
1346  g_return_if_fail (variable != NULL);
1347  g_return_if_fail (strchr (variable, '=') == NULL);
1348  g_return_if_fail (g_utf8_validate (variable, -1, NULL));
1349
1350  wname = g_utf8_to_utf16 (variable, -1, NULL, NULL, NULL);
1351  tem = g_strconcat (variable, "=", NULL);
1352  wassignment = g_utf8_to_utf16 (tem, -1, NULL, NULL, NULL);
1353
1354  g_free (tem);
1355  _wputenv (wassignment);
1356  g_free (wassignment);
1357
1358  SetEnvironmentVariableW (wname, NULL);
1359
1360  g_free (wname);
1361
1362#endif /* G_OS_WIN32 */
1363}
1364
1365/**
1366 * g_listenv:
1367 *
1368 * Gets the names of all variables set in the environment.
1369 *
1370 * Returns: a %NULL-terminated list of strings which must be freed
1371 * with g_strfreev().
1372 *
1373 * Programs that want to be portable to Windows should typically use
1374 * this function and g_getenv() instead of using the environ array
1375 * from the C library directly. On Windows, the strings in the environ
1376 * array are in system codepage encoding, while in most of the typical
1377 * use cases for environment variables in GLib-using programs you want
1378 * the UTF-8 encoding that this function and g_getenv() provide.
1379 *
1380 * Since: 2.8
1381 */
1382gchar **
1383g_listenv (void)
1384{
1385#ifndef G_OS_WIN32
1386  gchar **result, *eq;
1387  gint len, i, j;
1388
1389  len = g_strv_length (environ);
1390  result = g_new0 (gchar *, len + 1);
1391
1392  j = 0;
1393  for (i = 0; i < len; i++)
1394    {
1395      eq = strchr (environ[i], '=');
1396      if (eq)
1397	result[j++] = g_strndup (environ[i], eq - environ[i]);
1398    }
1399
1400  result[j] = NULL;
1401
1402  return result;
1403#else
1404  gchar **result, *eq;
1405  gint len = 0, j;
1406  wchar_t *p, *q;
1407
1408  p = (wchar_t *) GetEnvironmentStringsW ();
1409  if (p != NULL)
1410    {
1411      q = p;
1412      while (*q)
1413	{
1414	  q += wcslen (q) + 1;
1415	  len++;
1416	}
1417    }
1418  result = g_new0 (gchar *, len + 1);
1419
1420  j = 0;
1421  q = p;
1422  while (*q)
1423    {
1424      result[j] = g_utf16_to_utf8 (q, -1, NULL, NULL, NULL);
1425      if (result[j] != NULL)
1426	{
1427	  eq = strchr (result[j], '=');
1428	  if (eq && eq > result[j])
1429	    {
1430	      *eq = '\0';
1431	      j++;
1432	    }
1433	  else
1434	    g_free (result[j]);
1435	}
1436      q += wcslen (q) + 1;
1437    }
1438  result[j] = NULL;
1439  FreeEnvironmentStringsW (p);
1440
1441  return result;
1442#endif
1443}
1444
1445G_LOCK_DEFINE_STATIC (g_utils_global);
1446
1447static	gchar	*g_tmp_dir = NULL;
1448static	gchar	*g_user_name = NULL;
1449static	gchar	*g_real_name = NULL;
1450static	gchar	*g_home_dir = NULL;
1451static	gchar	*g_host_name = NULL;
1452
1453#ifdef G_OS_WIN32
1454/* System codepage versions of the above, kept at file level so that they,
1455 * too, are produced only once.
1456 */
1457static	gchar	*g_tmp_dir_cp = NULL;
1458static	gchar	*g_user_name_cp = NULL;
1459static	gchar	*g_real_name_cp = NULL;
1460static	gchar	*g_home_dir_cp = NULL;
1461#endif
1462
1463static  gchar   *g_user_data_dir = NULL;
1464static  gchar  **g_system_data_dirs = NULL;
1465static  gchar   *g_user_cache_dir = NULL;
1466static  gchar   *g_user_config_dir = NULL;
1467static  gchar  **g_system_config_dirs = NULL;
1468
1469static  gchar  **g_user_special_dirs = NULL;
1470
1471/* fifteen minutes of fame for everybody */
1472#define G_USER_DIRS_EXPIRE      15 * 60
1473
1474#ifdef G_OS_WIN32
1475
1476static gchar *
1477get_special_folder (int csidl)
1478{
1479  wchar_t path[MAX_PATH+1];
1480  HRESULT hr;
1481  LPITEMIDLIST pidl = NULL;
1482  BOOL b;
1483  gchar *retval = NULL;
1484
1485  hr = SHGetSpecialFolderLocation (NULL, csidl, &pidl);
1486  if (hr == S_OK)
1487    {
1488      b = SHGetPathFromIDListW (pidl, path);
1489      if (b)
1490	retval = g_utf16_to_utf8 (path, -1, NULL, NULL, NULL);
1491      CoTaskMemFree (pidl);
1492    }
1493  return retval;
1494}
1495
1496static char *
1497get_windows_directory_root (void)
1498{
1499  wchar_t wwindowsdir[MAX_PATH];
1500
1501  if (GetWindowsDirectoryW (wwindowsdir, G_N_ELEMENTS (wwindowsdir)))
1502    {
1503      /* Usually X:\Windows, but in terminal server environments
1504       * might be an UNC path, AFAIK.
1505       */
1506      char *windowsdir = g_utf16_to_utf8 (wwindowsdir, -1, NULL, NULL, NULL);
1507      char *p;
1508
1509      if (windowsdir == NULL)
1510	return g_strdup ("C:\\");
1511
1512      p = (char *) g_path_skip_root (windowsdir);
1513      if (G_IS_DIR_SEPARATOR (p[-1]) && p[-2] != ':')
1514	p--;
1515      *p = '\0';
1516      return windowsdir;
1517    }
1518  else
1519    return g_strdup ("C:\\");
1520}
1521
1522#endif
1523
1524/* HOLDS: g_utils_global_lock */
1525static void
1526g_get_any_init_do (void)
1527{
1528  gchar hostname[100];
1529
1530  g_tmp_dir = g_strdup (g_getenv ("TMPDIR"));
1531  if (!g_tmp_dir)
1532    g_tmp_dir = g_strdup (g_getenv ("TMP"));
1533  if (!g_tmp_dir)
1534    g_tmp_dir = g_strdup (g_getenv ("TEMP"));
1535
1536#ifdef G_OS_WIN32
1537  if (!g_tmp_dir)
1538    g_tmp_dir = get_windows_directory_root ();
1539#else
1540#ifdef P_tmpdir
1541  if (!g_tmp_dir)
1542    {
1543      gsize k;
1544      g_tmp_dir = g_strdup (P_tmpdir);
1545      k = strlen (g_tmp_dir);
1546      if (k > 1 && G_IS_DIR_SEPARATOR (g_tmp_dir[k - 1]))
1547	g_tmp_dir[k - 1] = '\0';
1548    }
1549#endif
1550
1551  if (!g_tmp_dir)
1552    {
1553      g_tmp_dir = g_strdup ("/tmp");
1554    }
1555#endif	/* !G_OS_WIN32 */
1556
1557#ifdef G_OS_WIN32
1558  /* We check $HOME first for Win32, though it is a last resort for Unix
1559   * where we prefer the results of getpwuid().
1560   */
1561  g_home_dir = g_strdup (g_getenv ("HOME"));
1562
1563  /* Only believe HOME if it is an absolute path and exists */
1564  if (g_home_dir)
1565    {
1566      if (!(g_path_is_absolute (g_home_dir) &&
1567	    g_file_test (g_home_dir, G_FILE_TEST_IS_DIR)))
1568	{
1569	  g_free (g_home_dir);
1570	  g_home_dir = NULL;
1571	}
1572    }
1573
1574  /* In case HOME is Unix-style (it happens), convert it to
1575   * Windows style.
1576   */
1577  if (g_home_dir)
1578    {
1579      gchar *p;
1580      while ((p = strchr (g_home_dir, '/')) != NULL)
1581	*p = '\\';
1582    }
1583
1584  if (!g_home_dir)
1585    {
1586      /* USERPROFILE is probably the closest equivalent to $HOME? */
1587      if (g_getenv ("USERPROFILE") != NULL)
1588	g_home_dir = g_strdup (g_getenv ("USERPROFILE"));
1589    }
1590
1591  if (!g_home_dir)
1592    g_home_dir = get_special_folder (CSIDL_PROFILE);
1593
1594  if (!g_home_dir)
1595    g_home_dir = get_windows_directory_root ();
1596#endif /* G_OS_WIN32 */
1597
1598#ifdef HAVE_PWD_H
1599  {
1600    struct passwd *pw = NULL;
1601    gpointer buffer = NULL;
1602    gint error;
1603    gchar *logname;
1604
1605#  if defined (HAVE_POSIX_GETPWUID_R) || defined (HAVE_NONPOSIX_GETPWUID_R)
1606    struct passwd pwd;
1607#    ifdef _SC_GETPW_R_SIZE_MAX
1608    /* This reurns the maximum length */
1609    glong bufsize = sysconf (_SC_GETPW_R_SIZE_MAX);
1610
1611    if (bufsize < 0)
1612      bufsize = 64;
1613#    else /* _SC_GETPW_R_SIZE_MAX */
1614    glong bufsize = 64;
1615#    endif /* _SC_GETPW_R_SIZE_MAX */
1616
1617    logname = (gchar *) g_getenv ("LOGNAME");
1618
1619    do
1620      {
1621	g_free (buffer);
1622	/* we allocate 6 extra bytes to work around a bug in
1623	 * Mac OS < 10.3. See #156446
1624	 */
1625	buffer = g_malloc (bufsize + 6);
1626	errno = 0;
1627
1628#    ifdef HAVE_POSIX_GETPWUID_R
1629	if (logname) {
1630	  error = getpwnam_r (logname, &pwd, buffer, bufsize, &pw);
1631	  if (!pw || (pw->pw_uid != getuid ())) {
1632	    /* LOGNAME is lying, fall back to looking up the uid */
1633	    error = getpwuid_r (getuid (), &pwd, buffer, bufsize, &pw);
1634	  }
1635	} else {
1636	  error = getpwuid_r (getuid (), &pwd, buffer, bufsize, &pw);
1637	}
1638	error = error < 0 ? errno : error;
1639#    else /* HAVE_NONPOSIX_GETPWUID_R */
1640   /* HPUX 11 falls into the HAVE_POSIX_GETPWUID_R case */
1641#      if defined(_AIX) || defined(__hpux)
1642	error = getpwuid_r (getuid (), &pwd, buffer, bufsize);
1643	pw = error == 0 ? &pwd : NULL;
1644#      else /* !_AIX */
1645	if (logname) {
1646	  pw = getpwnam_r (logname, &pwd, buffer, bufsize);
1647	  if (!pw || (pw->pw_uid != getuid ())) {
1648	    /* LOGNAME is lying, fall back to looking up the uid */
1649	    pw = getpwuid_r (getuid (), &pwd, buffer, bufsize);
1650	  }
1651	} else {
1652	  pw = getpwuid_r (getuid (), &pwd, buffer, bufsize);
1653	}
1654	error = pw ? 0 : errno;
1655#      endif /* !_AIX */
1656#    endif /* HAVE_NONPOSIX_GETPWUID_R */
1657
1658	if (!pw)
1659	  {
1660	    /* we bail out prematurely if the user id can't be found
1661	     * (should be pretty rare case actually), or if the buffer
1662	     * should be sufficiently big and lookups are still not
1663	     * successfull.
1664	     */
1665	    if (error == 0 || error == ENOENT)
1666	      {
1667		g_warning ("getpwuid_r(): failed due to unknown user id (%lu)",
1668			   (gulong) getuid ());
1669		break;
1670	      }
1671	    if (bufsize > 32 * 1024)
1672	      {
1673		g_warning ("getpwuid_r(): failed due to: %s.",
1674			   g_strerror (error));
1675		break;
1676	      }
1677
1678	    bufsize *= 2;
1679	  }
1680      }
1681    while (!pw);
1682#  endif /* HAVE_POSIX_GETPWUID_R || HAVE_NONPOSIX_GETPWUID_R */
1683
1684#ifndef ANDROID_STUB
1685    if (!pw)
1686      {
1687	setpwent ();
1688	pw = getpwuid (getuid ());
1689	endpwent ();
1690      }
1691#endif
1692    if (pw)
1693      {
1694	g_user_name = g_strdup (pw->pw_name);
1695
1696	#ifndef ANDROID_STUB
1697	if (pw->pw_gecos && *pw->pw_gecos != '\0')
1698	  {
1699	    gchar **gecos_fields;
1700	    gchar **name_parts;
1701
1702	    /* split the gecos field and substitute '&' */
1703	    gecos_fields = g_strsplit (pw->pw_gecos, ",", 0);
1704	    name_parts = g_strsplit (gecos_fields[0], "&", 0);
1705	    pw->pw_name[0] = g_ascii_toupper (pw->pw_name[0]);
1706	    g_real_name = g_strjoinv (pw->pw_name, name_parts);
1707	    g_strfreev (gecos_fields);
1708	    g_strfreev (name_parts);
1709	  }
1710	#endif
1711	if (!g_home_dir)
1712	  g_home_dir = g_strdup (pw->pw_dir);
1713      }
1714    g_free (buffer);
1715  }
1716
1717#else /* !HAVE_PWD_H */
1718
1719#ifdef G_OS_WIN32
1720  {
1721    guint len = UNLEN+1;
1722    wchar_t buffer[UNLEN+1];
1723
1724    if (GetUserNameW (buffer, (LPDWORD) &len))
1725      {
1726	g_user_name = g_utf16_to_utf8 (buffer, -1, NULL, NULL, NULL);
1727	g_real_name = g_strdup (g_user_name);
1728      }
1729  }
1730#endif /* G_OS_WIN32 */
1731
1732#endif /* !HAVE_PWD_H */
1733
1734#ifndef G_OS_WIN32
1735  if (!g_home_dir)
1736    g_home_dir = g_strdup (g_getenv ("HOME"));
1737#endif
1738
1739#ifdef __EMX__
1740  /* change '\\' in %HOME% to '/' */
1741  g_strdelimit (g_home_dir, "\\",'/');
1742#endif
1743  if (!g_user_name)
1744    g_user_name = g_strdup ("somebody");
1745  if (!g_real_name)
1746    g_real_name = g_strdup ("Unknown");
1747
1748  {
1749#ifndef G_OS_WIN32
1750    gboolean hostname_fail = (gethostname (hostname, sizeof (hostname)) == -1);
1751#else
1752    DWORD size = sizeof (hostname);
1753    gboolean hostname_fail = (!GetComputerName (hostname, &size));
1754#endif
1755    g_host_name = g_strdup (hostname_fail ? "localhost" : hostname);
1756  }
1757
1758#ifdef G_OS_WIN32
1759  g_tmp_dir_cp = g_locale_from_utf8 (g_tmp_dir, -1, NULL, NULL, NULL);
1760  g_user_name_cp = g_locale_from_utf8 (g_user_name, -1, NULL, NULL, NULL);
1761  g_real_name_cp = g_locale_from_utf8 (g_real_name, -1, NULL, NULL, NULL);
1762
1763  if (!g_tmp_dir_cp)
1764    g_tmp_dir_cp = g_strdup ("\\");
1765  if (!g_user_name_cp)
1766    g_user_name_cp = g_strdup ("somebody");
1767  if (!g_real_name_cp)
1768    g_real_name_cp = g_strdup ("Unknown");
1769
1770  /* home_dir might be NULL, unlike tmp_dir, user_name and
1771   * real_name.
1772   */
1773  if (g_home_dir)
1774    g_home_dir_cp = g_locale_from_utf8 (g_home_dir, -1, NULL, NULL, NULL);
1775  else
1776    g_home_dir_cp = NULL;
1777#endif /* G_OS_WIN32 */
1778}
1779
1780static inline void
1781g_get_any_init (void)
1782{
1783  if (!g_tmp_dir)
1784    g_get_any_init_do ();
1785}
1786
1787static inline void
1788g_get_any_init_locked (void)
1789{
1790  G_LOCK (g_utils_global);
1791  g_get_any_init ();
1792  G_UNLOCK (g_utils_global);
1793}
1794
1795
1796/**
1797 * g_get_user_name:
1798 *
1799 * Gets the user name of the current user. The encoding of the returned
1800 * string is system-defined. On UNIX, it might be the preferred file name
1801 * encoding, or something else, and there is no guarantee that it is even
1802 * consistent on a machine. On Windows, it is always UTF-8.
1803 *
1804 * Returns: the user name of the current user.
1805 */
1806G_CONST_RETURN gchar*
1807g_get_user_name (void)
1808{
1809  g_get_any_init_locked ();
1810  return g_user_name;
1811}
1812
1813/**
1814 * g_get_real_name:
1815 *
1816 * Gets the real name of the user. This usually comes from the user's entry
1817 * in the <filename>passwd</filename> file. The encoding of the returned
1818 * string is system-defined. (On Windows, it is, however, always UTF-8.)
1819 * If the real user name cannot be determined, the string "Unknown" is
1820 * returned.
1821 *
1822 * Returns: the user's real name.
1823 */
1824G_CONST_RETURN gchar*
1825g_get_real_name (void)
1826{
1827  g_get_any_init_locked ();
1828  return g_real_name;
1829}
1830
1831/**
1832 * g_get_home_dir:
1833 *
1834 * Gets the current user's home directory as defined in the
1835 * password database.
1836 *
1837 * Note that in contrast to traditional UNIX tools, this function
1838 * prefers <filename>passwd</filename> entries over the <envar>HOME</envar>
1839 * environment variable.
1840 *
1841 * One of the reasons for this decision is that applications in many
1842 * cases need special handling to deal with the case where
1843 * <envar>HOME</envar> is
1844 * <simplelist>
1845 *   <member>Not owned by the user</member>
1846 *   <member>Not writeable</member>
1847 *   <member>Not even readable</member>
1848 * </simplelist>
1849 * Since applications are in general <emphasis>not</emphasis> written
1850 * to deal with these situations it was considered better to make
1851 * g_get_home_dir() not pay attention to <envar>HOME</envar> and to
1852 * return the real home directory for the user. If applications
1853 * want to pay attention to <envar>HOME</envar>, they can do:
1854 * |[
1855 *  const char *homedir = g_getenv ("HOME");
1856 *   if (!homedir)
1857 *      homedir = g_get_home_dir (<!-- -->);
1858 * ]|
1859 *
1860 * Returns: the current user's home directory
1861 */
1862G_CONST_RETURN gchar*
1863g_get_home_dir (void)
1864{
1865  g_get_any_init_locked ();
1866  return g_home_dir;
1867}
1868
1869/**
1870 * g_get_tmp_dir:
1871 *
1872 * Gets the directory to use for temporary files. This is found from
1873 * inspecting the environment variables <envar>TMPDIR</envar>,
1874 * <envar>TMP</envar>, and <envar>TEMP</envar> in that order. If none
1875 * of those are defined "/tmp" is returned on UNIX and "C:\" on Windows.
1876 * The encoding of the returned string is system-defined. On Windows,
1877 * it is always UTF-8. The return value is never %NULL.
1878 *
1879 * Returns: the directory to use for temporary files.
1880 */
1881G_CONST_RETURN gchar*
1882g_get_tmp_dir (void)
1883{
1884  g_get_any_init_locked ();
1885  return g_tmp_dir;
1886}
1887
1888/**
1889 * g_get_host_name:
1890 *
1891 * Return a name for the machine.
1892 *
1893 * The returned name is not necessarily a fully-qualified domain name,
1894 * or even present in DNS or some other name service at all. It need
1895 * not even be unique on your local network or site, but usually it
1896 * is. Callers should not rely on the return value having any specific
1897 * properties like uniqueness for security purposes. Even if the name
1898 * of the machine is changed while an application is running, the
1899 * return value from this function does not change. The returned
1900 * string is owned by GLib and should not be modified or freed. If no
1901 * name can be determined, a default fixed string "localhost" is
1902 * returned.
1903 *
1904 * Returns: the host name of the machine.
1905 *
1906 * Since: 2.8
1907 */
1908const gchar *
1909g_get_host_name (void)
1910{
1911  g_get_any_init_locked ();
1912  return g_host_name;
1913}
1914
1915G_LOCK_DEFINE_STATIC (g_prgname);
1916static gchar *g_prgname = NULL;
1917
1918/**
1919 * g_get_prgname:
1920 *
1921 * Gets the name of the program. This name should <emphasis>not</emphasis>
1922 * be localized, contrast with g_get_application_name().
1923 * (If you are using GDK or GTK+ the program name is set in gdk_init(),
1924 * which is called by gtk_init(). The program name is found by taking
1925 * the last component of <literal>argv[0]</literal>.)
1926 *
1927 * Returns: the name of the program. The returned string belongs
1928 * to GLib and must not be modified or freed.
1929 */
1930gchar*
1931g_get_prgname (void)
1932{
1933  gchar* retval;
1934
1935  G_LOCK (g_prgname);
1936#ifdef G_OS_WIN32
1937  if (g_prgname == NULL)
1938    {
1939      static gboolean beenhere = FALSE;
1940
1941      if (!beenhere)
1942	{
1943	  gchar *utf8_buf = NULL;
1944	  wchar_t buf[MAX_PATH+1];
1945
1946	  beenhere = TRUE;
1947	  if (GetModuleFileNameW (GetModuleHandle (NULL),
1948				  buf, G_N_ELEMENTS (buf)) > 0)
1949	    utf8_buf = g_utf16_to_utf8 (buf, -1, NULL, NULL, NULL);
1950
1951	  if (utf8_buf)
1952	    {
1953	      g_prgname = g_path_get_basename (utf8_buf);
1954	      g_free (utf8_buf);
1955	    }
1956	}
1957    }
1958#endif
1959  retval = g_prgname;
1960  G_UNLOCK (g_prgname);
1961
1962  return retval;
1963}
1964
1965/**
1966 * g_set_prgname:
1967 * @prgname: the name of the program.
1968 *
1969 * Sets the name of the program. This name should <emphasis>not</emphasis>
1970 * be localized, contrast with g_set_application_name(). Note that for
1971 * thread-safety reasons this function can only be called once.
1972 */
1973void
1974g_set_prgname (const gchar *prgname)
1975{
1976  G_LOCK (g_prgname);
1977  g_free (g_prgname);
1978  g_prgname = g_strdup (prgname);
1979  G_UNLOCK (g_prgname);
1980}
1981
1982G_LOCK_DEFINE_STATIC (g_application_name);
1983static gchar *g_application_name = NULL;
1984
1985/**
1986 * g_get_application_name:
1987 *
1988 * Gets a human-readable name for the application, as set by
1989 * g_set_application_name(). This name should be localized if
1990 * possible, and is intended for display to the user.  Contrast with
1991 * g_get_prgname(), which gets a non-localized name. If
1992 * g_set_application_name() has not been called, returns the result of
1993 * g_get_prgname() (which may be %NULL if g_set_prgname() has also not
1994 * been called).
1995 *
1996 * Return value: human-readable application name. may return %NULL
1997 *
1998 * Since: 2.2
1999 **/
2000G_CONST_RETURN gchar*
2001g_get_application_name (void)
2002{
2003  gchar* retval;
2004
2005  G_LOCK (g_application_name);
2006  retval = g_application_name;
2007  G_UNLOCK (g_application_name);
2008
2009  if (retval == NULL)
2010    return g_get_prgname ();
2011
2012  return retval;
2013}
2014
2015/**
2016 * g_set_application_name:
2017 * @application_name: localized name of the application
2018 *
2019 * Sets a human-readable name for the application. This name should be
2020 * localized if possible, and is intended for display to the user.
2021 * Contrast with g_set_prgname(), which sets a non-localized name.
2022 * g_set_prgname() will be called automatically by gtk_init(),
2023 * but g_set_application_name() will not.
2024 *
2025 * Note that for thread safety reasons, this function can only
2026 * be called once.
2027 *
2028 * The application name will be used in contexts such as error messages,
2029 * or when displaying an application's name in the task list.
2030 *
2031 * Since: 2.2
2032 **/
2033void
2034g_set_application_name (const gchar *application_name)
2035{
2036  gboolean already_set = FALSE;
2037
2038  G_LOCK (g_application_name);
2039  if (g_application_name)
2040    already_set = TRUE;
2041  else
2042    g_application_name = g_strdup (application_name);
2043  G_UNLOCK (g_application_name);
2044
2045  if (already_set)
2046    g_warning ("g_set_application() name called multiple times");
2047}
2048
2049/**
2050 * g_get_user_data_dir:
2051 *
2052 * Returns a base directory in which to access application data such
2053 * as icons that is customized for a particular user.
2054 *
2055 * On UNIX platforms this is determined using the mechanisms described in
2056 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
2057 * XDG Base Directory Specification</ulink>
2058 *
2059 * Return value: a string owned by GLib that must not be modified
2060 *               or freed.
2061 * Since: 2.6
2062 **/
2063G_CONST_RETURN gchar*
2064g_get_user_data_dir (void)
2065{
2066  gchar *data_dir;
2067
2068  G_LOCK (g_utils_global);
2069
2070  if (!g_user_data_dir)
2071    {
2072#ifdef G_OS_WIN32
2073      data_dir = get_special_folder (CSIDL_PERSONAL);
2074#else
2075      data_dir = (gchar *) g_getenv ("XDG_DATA_HOME");
2076
2077      if (data_dir && data_dir[0])
2078        data_dir = g_strdup (data_dir);
2079#endif
2080      if (!data_dir || !data_dir[0])
2081	{
2082	  g_get_any_init ();
2083
2084	  if (g_home_dir)
2085	    data_dir = g_build_filename (g_home_dir, ".local",
2086					 "share", NULL);
2087	  else
2088	    data_dir = g_build_filename (g_tmp_dir, g_user_name, ".local",
2089					 "share", NULL);
2090	}
2091
2092      g_user_data_dir = data_dir;
2093    }
2094  else
2095    data_dir = g_user_data_dir;
2096
2097  G_UNLOCK (g_utils_global);
2098
2099  return data_dir;
2100}
2101
2102static void
2103g_init_user_config_dir (void)
2104{
2105  gchar *config_dir;
2106
2107  if (!g_user_config_dir)
2108    {
2109#ifdef G_OS_WIN32
2110      config_dir = get_special_folder (CSIDL_APPDATA);
2111#else
2112      config_dir = (gchar *) g_getenv ("XDG_CONFIG_HOME");
2113
2114      if (config_dir && config_dir[0])
2115	config_dir = g_strdup (config_dir);
2116#endif
2117      if (!config_dir || !config_dir[0])
2118	{
2119	  g_get_any_init ();
2120
2121	  if (g_home_dir)
2122	    config_dir = g_build_filename (g_home_dir, ".config", NULL);
2123	  else
2124	    config_dir = g_build_filename (g_tmp_dir, g_user_name, ".config", NULL);
2125	}
2126
2127      g_user_config_dir = config_dir;
2128    }
2129}
2130
2131/**
2132 * g_get_user_config_dir:
2133 *
2134 * Returns a base directory in which to store user-specific application
2135 * configuration information such as user preferences and settings.
2136 *
2137 * On UNIX platforms this is determined using the mechanisms described in
2138 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
2139 * XDG Base Directory Specification</ulink>
2140 *
2141 * Return value: a string owned by GLib that must not be modified
2142 *               or freed.
2143 * Since: 2.6
2144 **/
2145G_CONST_RETURN gchar*
2146g_get_user_config_dir (void)
2147{
2148  G_LOCK (g_utils_global);
2149
2150  g_init_user_config_dir ();
2151
2152  G_UNLOCK (g_utils_global);
2153
2154  return g_user_config_dir;
2155}
2156
2157/**
2158 * g_get_user_cache_dir:
2159 *
2160 * Returns a base directory in which to store non-essential, cached
2161 * data specific to particular user.
2162 *
2163 * On UNIX platforms this is determined using the mechanisms described in
2164 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
2165 * XDG Base Directory Specification</ulink>
2166 *
2167 * Return value: a string owned by GLib that must not be modified
2168 *               or freed.
2169 * Since: 2.6
2170 **/
2171G_CONST_RETURN gchar*
2172g_get_user_cache_dir (void)
2173{
2174  gchar *cache_dir;
2175
2176  G_LOCK (g_utils_global);
2177
2178  if (!g_user_cache_dir)
2179    {
2180#ifdef G_OS_WIN32
2181      cache_dir = get_special_folder (CSIDL_INTERNET_CACHE); /* XXX correct? */
2182#else
2183      cache_dir = (gchar *) g_getenv ("XDG_CACHE_HOME");
2184
2185      if (cache_dir && cache_dir[0])
2186          cache_dir = g_strdup (cache_dir);
2187#endif
2188      if (!cache_dir || !cache_dir[0])
2189	{
2190	  g_get_any_init ();
2191
2192	  if (g_home_dir)
2193	    cache_dir = g_build_filename (g_home_dir, ".cache", NULL);
2194	  else
2195	    cache_dir = g_build_filename (g_tmp_dir, g_user_name, ".cache", NULL);
2196	}
2197      g_user_cache_dir = cache_dir;
2198    }
2199  else
2200    cache_dir = g_user_cache_dir;
2201
2202  G_UNLOCK (g_utils_global);
2203
2204  return cache_dir;
2205}
2206
2207#ifdef HAVE_CARBON
2208
2209static gchar *
2210find_folder (OSType type)
2211{
2212  gchar *filename = NULL;
2213  FSRef  found;
2214
2215  if (FSFindFolder (kUserDomain, type, kDontCreateFolder, &found) == noErr)
2216    {
2217      CFURLRef url = CFURLCreateFromFSRef (kCFAllocatorSystemDefault, &found);
2218
2219      if (url)
2220	{
2221	  CFStringRef path = CFURLCopyFileSystemPath (url, kCFURLPOSIXPathStyle);
2222
2223	  if (path)
2224	    {
2225	      filename = g_strdup (CFStringGetCStringPtr (path, kCFStringEncodingUTF8));
2226
2227	      if (! filename)
2228		{
2229		  filename = g_new0 (gchar, CFStringGetLength (path) * 3 + 1);
2230
2231		  CFStringGetCString (path, filename,
2232				      CFStringGetLength (path) * 3 + 1,
2233				      kCFStringEncodingUTF8);
2234		}
2235
2236	      CFRelease (path);
2237	    }
2238
2239	  CFRelease (url);
2240	}
2241    }
2242
2243  return filename;
2244}
2245
2246static void
2247load_user_special_dirs (void)
2248{
2249  g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] = find_folder (kDesktopFolderType);
2250  g_user_special_dirs[G_USER_DIRECTORY_DOCUMENTS] = find_folder (kDocumentsFolderType);
2251  g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = find_folder (kDesktopFolderType); /* XXX correct ? */
2252  g_user_special_dirs[G_USER_DIRECTORY_MUSIC] = find_folder (kMusicDocumentsFolderType);
2253  g_user_special_dirs[G_USER_DIRECTORY_PICTURES] = find_folder (kPictureDocumentsFolderType);
2254  g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = NULL;
2255  g_user_special_dirs[G_USER_DIRECTORY_TEMPLATES] = NULL;
2256  g_user_special_dirs[G_USER_DIRECTORY_VIDEOS] = find_folder (kMovieDocumentsFolderType);
2257}
2258
2259#endif /* HAVE_CARBON */
2260
2261#if defined(G_OS_WIN32)
2262static void
2263load_user_special_dirs (void)
2264{
2265  typedef HRESULT (WINAPI *t_SHGetKnownFolderPath) (const GUID *rfid,
2266						    DWORD dwFlags,
2267						    HANDLE hToken,
2268						    PWSTR *ppszPath);
2269  t_SHGetKnownFolderPath p_SHGetKnownFolderPath;
2270  static const GUID FOLDERID_Downloads =
2271    { 0x374de290, 0x123f, 0x4565, { 0x91, 0x64, 0x39, 0xc4, 0x92, 0x5e, 0x46, 0x7b } };
2272  static const GUID FOLDERID_Public =
2273    { 0xDFDF76A2, 0xC82A, 0x4D63, { 0x90, 0x6A, 0x56, 0x44, 0xAC, 0x45, 0x73, 0x85 } };
2274  wchar_t *wcp;
2275
2276  p_SHGetKnownFolderPath = (t_SHGetKnownFolderPath) GetProcAddress (LoadLibrary ("shell32.dll"),
2277								    "SHGetKnownFolderPath");
2278
2279  g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] = get_special_folder (CSIDL_DESKTOPDIRECTORY);
2280  g_user_special_dirs[G_USER_DIRECTORY_DOCUMENTS] = get_special_folder (CSIDL_PERSONAL);
2281
2282  if (p_SHGetKnownFolderPath == NULL)
2283    {
2284      g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = get_special_folder (CSIDL_DESKTOPDIRECTORY);
2285    }
2286  else
2287    {
2288      wcp = NULL;
2289      (*p_SHGetKnownFolderPath) (&FOLDERID_Downloads, 0, NULL, &wcp);
2290      g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = g_utf16_to_utf8 (wcp, -1, NULL, NULL, NULL);
2291      if (g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] == NULL)
2292	g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = get_special_folder (CSIDL_DESKTOPDIRECTORY);
2293      CoTaskMemFree (wcp);
2294    }
2295
2296  g_user_special_dirs[G_USER_DIRECTORY_MUSIC] = get_special_folder (CSIDL_MYMUSIC);
2297  g_user_special_dirs[G_USER_DIRECTORY_PICTURES] = get_special_folder (CSIDL_MYPICTURES);
2298
2299  if (p_SHGetKnownFolderPath == NULL)
2300    {
2301      /* XXX */
2302      g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = get_special_folder (CSIDL_COMMON_DOCUMENTS);
2303    }
2304  else
2305    {
2306      wcp = NULL;
2307      (*p_SHGetKnownFolderPath) (&FOLDERID_Public, 0, NULL, &wcp);
2308      g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = g_utf16_to_utf8 (wcp, -1, NULL, NULL, NULL);
2309      if (g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] == NULL)
2310	g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = get_special_folder (CSIDL_COMMON_DOCUMENTS);
2311      CoTaskMemFree (wcp);
2312    }
2313
2314  g_user_special_dirs[G_USER_DIRECTORY_TEMPLATES] = get_special_folder (CSIDL_TEMPLATES);
2315  g_user_special_dirs[G_USER_DIRECTORY_VIDEOS] = get_special_folder (CSIDL_MYVIDEO);
2316}
2317#endif /* G_OS_WIN32 */
2318
2319static void g_init_user_config_dir (void);
2320
2321#if defined(G_OS_UNIX) && !defined(HAVE_CARBON)
2322
2323/* adapted from xdg-user-dir-lookup.c
2324 *
2325 * Copyright (C) 2007 Red Hat Inc.
2326 *
2327 * Permission is hereby granted, free of charge, to any person
2328 * obtaining a copy of this software and associated documentation files
2329 * (the "Software"), to deal in the Software without restriction,
2330 * including without limitation the rights to use, copy, modify, merge,
2331 * publish, distribute, sublicense, and/or sell copies of the Software,
2332 * and to permit persons to whom the Software is furnished to do so,
2333 * subject to the following conditions:
2334 *
2335 * The above copyright notice and this permission notice shall be
2336 * included in all copies or substantial portions of the Software.
2337 *
2338 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
2339 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
2340 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
2341 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
2342 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
2343 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
2344 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
2345 * SOFTWARE.
2346 */
2347static void
2348load_user_special_dirs (void)
2349{
2350  gchar *config_file;
2351  gchar *data;
2352  gchar **lines;
2353  gint n_lines, i;
2354
2355  g_init_user_config_dir ();
2356  config_file = g_build_filename (g_user_config_dir,
2357                                  "user-dirs.dirs",
2358                                  NULL);
2359
2360  if (!g_file_get_contents (config_file, &data, NULL, NULL))
2361    {
2362      g_free (config_file);
2363      return;
2364    }
2365
2366  lines = g_strsplit (data, "\n", -1);
2367  n_lines = g_strv_length (lines);
2368  g_free (data);
2369
2370  for (i = 0; i < n_lines; i++)
2371    {
2372      gchar *buffer = lines[i];
2373      gchar *d, *p;
2374      gint len;
2375      gboolean is_relative = FALSE;
2376      GUserDirectory directory;
2377
2378      /* Remove newline at end */
2379      len = strlen (buffer);
2380      if (len > 0 && buffer[len - 1] == '\n')
2381	buffer[len - 1] = 0;
2382
2383      p = buffer;
2384      while (*p == ' ' || *p == '\t')
2385	p++;
2386
2387      if (strncmp (p, "XDG_DESKTOP_DIR", strlen ("XDG_DESKTOP_DIR")) == 0)
2388        {
2389          directory = G_USER_DIRECTORY_DESKTOP;
2390          p += strlen ("XDG_DESKTOP_DIR");
2391        }
2392      else if (strncmp (p, "XDG_DOCUMENTS_DIR", strlen ("XDG_DOCUMENTS_DIR")) == 0)
2393        {
2394          directory = G_USER_DIRECTORY_DOCUMENTS;
2395          p += strlen ("XDG_DOCUMENTS_DIR");
2396        }
2397      else if (strncmp (p, "XDG_DOWNLOAD_DIR", strlen ("XDG_DOWNLOAD_DIR")) == 0)
2398        {
2399          directory = G_USER_DIRECTORY_DOWNLOAD;
2400          p += strlen ("XDG_DOWNLOAD_DIR");
2401        }
2402      else if (strncmp (p, "XDG_MUSIC_DIR", strlen ("XDG_MUSIC_DIR")) == 0)
2403        {
2404          directory = G_USER_DIRECTORY_MUSIC;
2405          p += strlen ("XDG_MUSIC_DIR");
2406        }
2407      else if (strncmp (p, "XDG_PICTURES_DIR", strlen ("XDG_PICTURES_DIR")) == 0)
2408        {
2409          directory = G_USER_DIRECTORY_PICTURES;
2410          p += strlen ("XDG_PICTURES_DIR");
2411        }
2412      else if (strncmp (p, "XDG_PUBLICSHARE_DIR", strlen ("XDG_PUBLICSHARE_DIR")) == 0)
2413        {
2414          directory = G_USER_DIRECTORY_PUBLIC_SHARE;
2415          p += strlen ("XDG_PUBLICSHARE_DIR");
2416        }
2417      else if (strncmp (p, "XDG_TEMPLATES_DIR", strlen ("XDG_TEMPLATES_DIR")) == 0)
2418        {
2419          directory = G_USER_DIRECTORY_TEMPLATES;
2420          p += strlen ("XDG_TEMPLATES_DIR");
2421        }
2422      else if (strncmp (p, "XDG_VIDEOS_DIR", strlen ("XDG_VIDEOS_DIR")) == 0)
2423        {
2424          directory = G_USER_DIRECTORY_VIDEOS;
2425          p += strlen ("XDG_VIDEOS_DIR");
2426        }
2427      else
2428	continue;
2429
2430      while (*p == ' ' || *p == '\t')
2431	p++;
2432
2433      if (*p != '=')
2434	continue;
2435      p++;
2436
2437      while (*p == ' ' || *p == '\t')
2438	p++;
2439
2440      if (*p != '"')
2441	continue;
2442      p++;
2443
2444      if (strncmp (p, "$HOME", 5) == 0)
2445	{
2446	  p += 5;
2447	  is_relative = TRUE;
2448	}
2449      else if (*p != '/')
2450	continue;
2451
2452      d = strrchr (p, '"');
2453      if (!d)
2454        continue;
2455      *d = 0;
2456
2457      d = p;
2458
2459      /* remove trailing slashes */
2460      len = strlen (d);
2461      if (d[len - 1] == '/')
2462        d[len - 1] = 0;
2463
2464      if (is_relative)
2465        {
2466          g_get_any_init ();
2467          g_user_special_dirs[directory] = g_build_filename (g_home_dir, d, NULL);
2468        }
2469      else
2470	g_user_special_dirs[directory] = g_strdup (d);
2471    }
2472
2473  g_strfreev (lines);
2474  g_free (config_file);
2475}
2476
2477#endif /* G_OS_UNIX && !HAVE_CARBON */
2478
2479/**
2480 * g_get_user_special_dir:
2481 * @directory: the logical id of special directory
2482 *
2483 * Returns the full path of a special directory using its logical id.
2484 *
2485 * On Unix this is done using the XDG special user directories.
2486 * For compatibility with existing practise, %G_USER_DIRECTORY_DESKTOP
2487 * falls back to <filename>$HOME/Desktop</filename> when XDG special
2488 * user directories have not been set up.
2489 *
2490 * Depending on the platform, the user might be able to change the path
2491 * of the special directory without requiring the session to restart; GLib
2492 * will not reflect any change once the special directories are loaded.
2493 *
2494 * Return value: the path to the specified special directory, or %NULL
2495 *   if the logical id was not found. The returned string is owned by
2496 *   GLib and should not be modified or freed.
2497 *
2498 * Since: 2.14
2499 */
2500G_CONST_RETURN gchar *
2501g_get_user_special_dir (GUserDirectory directory)
2502{
2503  g_return_val_if_fail (directory >= G_USER_DIRECTORY_DESKTOP &&
2504                        directory < G_USER_N_DIRECTORIES, NULL);
2505
2506  G_LOCK (g_utils_global);
2507
2508  if (G_UNLIKELY (g_user_special_dirs == NULL))
2509    {
2510      g_user_special_dirs = g_new0 (gchar *, G_USER_N_DIRECTORIES);
2511
2512      load_user_special_dirs ();
2513
2514      /* Special-case desktop for historical compatibility */
2515      if (g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] == NULL)
2516        {
2517          g_get_any_init ();
2518
2519          g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] =
2520            g_build_filename (g_home_dir, "Desktop", NULL);
2521        }
2522    }
2523
2524  G_UNLOCK (g_utils_global);
2525
2526  return g_user_special_dirs[directory];
2527}
2528
2529#ifdef G_OS_WIN32
2530
2531#undef g_get_system_data_dirs
2532
2533static HMODULE
2534get_module_for_address (gconstpointer address)
2535{
2536  /* Holds the g_utils_global lock */
2537
2538  static gboolean beenhere = FALSE;
2539  typedef BOOL (WINAPI *t_GetModuleHandleExA) (DWORD, LPCTSTR, HMODULE *);
2540  static t_GetModuleHandleExA p_GetModuleHandleExA = NULL;
2541  HMODULE hmodule = NULL;
2542
2543  if (!address)
2544    return NULL;
2545
2546  if (!beenhere)
2547    {
2548      p_GetModuleHandleExA =
2549	(t_GetModuleHandleExA) GetProcAddress (LoadLibrary ("kernel32.dll"),
2550					       "GetModuleHandleExA");
2551      beenhere = TRUE;
2552    }
2553
2554  if (p_GetModuleHandleExA == NULL ||
2555      !(*p_GetModuleHandleExA) (GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT |
2556				GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
2557				address, &hmodule))
2558    {
2559      MEMORY_BASIC_INFORMATION mbi;
2560      VirtualQuery (address, &mbi, sizeof (mbi));
2561      hmodule = (HMODULE) mbi.AllocationBase;
2562    }
2563
2564  return hmodule;
2565}
2566
2567static gchar *
2568get_module_share_dir (gconstpointer address)
2569{
2570  HMODULE hmodule;
2571  gchar *filename;
2572  gchar *retval;
2573
2574  hmodule = get_module_for_address (address);
2575  if (hmodule == NULL)
2576    return NULL;
2577
2578  filename = g_win32_get_package_installation_directory_of_module (hmodule);
2579  retval = g_build_filename (filename, "share", NULL);
2580  g_free (filename);
2581
2582  return retval;
2583}
2584
2585G_CONST_RETURN gchar * G_CONST_RETURN *
2586g_win32_get_system_data_dirs_for_module (void (*address_of_function)())
2587{
2588  GArray *data_dirs;
2589  HMODULE hmodule;
2590  static GHashTable *per_module_data_dirs = NULL;
2591  gchar **retval;
2592  gchar *p;
2593  gchar *exe_root;
2594
2595  if (address_of_function)
2596    {
2597      G_LOCK (g_utils_global);
2598      hmodule = get_module_for_address (address_of_function);
2599      if (hmodule != NULL)
2600	{
2601	  if (per_module_data_dirs == NULL)
2602	    per_module_data_dirs = g_hash_table_new (NULL, NULL);
2603	  else
2604	    {
2605	      retval = g_hash_table_lookup (per_module_data_dirs, hmodule);
2606
2607	      if (retval != NULL)
2608		{
2609		  G_UNLOCK (g_utils_global);
2610		  return (G_CONST_RETURN gchar * G_CONST_RETURN *) retval;
2611		}
2612	    }
2613	}
2614    }
2615
2616  data_dirs = g_array_new (TRUE, TRUE, sizeof (char *));
2617
2618  /* Documents and Settings\All Users\Application Data */
2619  p = get_special_folder (CSIDL_COMMON_APPDATA);
2620  if (p)
2621    g_array_append_val (data_dirs, p);
2622
2623  /* Documents and Settings\All Users\Documents */
2624  p = get_special_folder (CSIDL_COMMON_DOCUMENTS);
2625  if (p)
2626    g_array_append_val (data_dirs, p);
2627
2628  /* Using the above subfolders of Documents and Settings perhaps
2629   * makes sense from a Windows perspective.
2630   *
2631   * But looking at the actual use cases of this function in GTK+
2632   * and GNOME software, what we really want is the "share"
2633   * subdirectory of the installation directory for the package
2634   * our caller is a part of.
2635   *
2636   * The address_of_function parameter, if non-NULL, points to a
2637   * function in the calling module. Use that to determine that
2638   * module's installation folder, and use its "share" subfolder.
2639   *
2640   * Additionally, also use the "share" subfolder of the installation
2641   * locations of GLib and the .exe file being run.
2642   *
2643   * To guard against none of the above being what is really wanted,
2644   * callers of this function should have Win32-specific code to look
2645   * up their installation folder themselves, and handle a subfolder
2646   * "share" of it in the same way as the folders returned from this
2647   * function.
2648   */
2649
2650  p = get_module_share_dir (address_of_function);
2651  if (p)
2652    g_array_append_val (data_dirs, p);
2653
2654  if (glib_dll != NULL)
2655    {
2656      gchar *glib_root = g_win32_get_package_installation_directory_of_module (glib_dll);
2657      p = g_build_filename (glib_root, "share", NULL);
2658      if (p)
2659	g_array_append_val (data_dirs, p);
2660      g_free (glib_root);
2661    }
2662
2663  exe_root = g_win32_get_package_installation_directory_of_module (NULL);
2664  p = g_build_filename (exe_root, "share", NULL);
2665  if (p)
2666    g_array_append_val (data_dirs, p);
2667  g_free (exe_root);
2668
2669  retval = (gchar **) g_array_free (data_dirs, FALSE);
2670
2671  if (address_of_function)
2672    {
2673      if (hmodule != NULL)
2674	g_hash_table_insert (per_module_data_dirs, hmodule, retval);
2675      G_UNLOCK (g_utils_global);
2676    }
2677
2678  return (G_CONST_RETURN gchar * G_CONST_RETURN *) retval;
2679}
2680
2681#endif
2682
2683/**
2684 * g_get_system_data_dirs:
2685 *
2686 * Returns an ordered list of base directories in which to access
2687 * system-wide application data.
2688 *
2689 * On UNIX platforms this is determined using the mechanisms described in
2690 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
2691 * XDG Base Directory Specification</ulink>
2692 *
2693 * On Windows the first elements in the list are the Application Data
2694 * and Documents folders for All Users. (These can be determined only
2695 * on Windows 2000 or later and are not present in the list on other
2696 * Windows versions.) See documentation for CSIDL_COMMON_APPDATA and
2697 * CSIDL_COMMON_DOCUMENTS.
2698 *
2699 * Then follows the "share" subfolder in the installation folder for
2700 * the package containing the DLL that calls this function, if it can
2701 * be determined.
2702 *
2703 * Finally the list contains the "share" subfolder in the installation
2704 * folder for GLib, and in the installation folder for the package the
2705 * application's .exe file belongs to.
2706 *
2707 * The installation folders above are determined by looking up the
2708 * folder where the module (DLL or EXE) in question is located. If the
2709 * folder's name is "bin", its parent is used, otherwise the folder
2710 * itself.
2711 *
2712 * Note that on Windows the returned list can vary depending on where
2713 * this function is called.
2714 *
2715 * Return value: a %NULL-terminated array of strings owned by GLib that must
2716 *               not be modified or freed.
2717 * Since: 2.6
2718 **/
2719G_CONST_RETURN gchar * G_CONST_RETURN *
2720g_get_system_data_dirs (void)
2721{
2722  gchar **data_dir_vector;
2723
2724  G_LOCK (g_utils_global);
2725
2726  if (!g_system_data_dirs)
2727    {
2728#ifdef G_OS_WIN32
2729      data_dir_vector = (gchar **) g_win32_get_system_data_dirs_for_module (NULL);
2730#else
2731      gchar *data_dirs = (gchar *) g_getenv ("XDG_DATA_DIRS");
2732
2733      if (!data_dirs || !data_dirs[0])
2734          data_dirs = "/usr/local/share/:/usr/share/";
2735
2736      data_dir_vector = g_strsplit (data_dirs, G_SEARCHPATH_SEPARATOR_S, 0);
2737#endif
2738
2739      g_system_data_dirs = data_dir_vector;
2740    }
2741  else
2742    data_dir_vector = g_system_data_dirs;
2743
2744  G_UNLOCK (g_utils_global);
2745
2746  return (G_CONST_RETURN gchar * G_CONST_RETURN *) data_dir_vector;
2747}
2748
2749/**
2750 * g_get_system_config_dirs:
2751 *
2752 * Returns an ordered list of base directories in which to access
2753 * system-wide configuration information.
2754 *
2755 * On UNIX platforms this is determined using the mechanisms described in
2756 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
2757 * XDG Base Directory Specification</ulink>
2758 *
2759 * Return value: a %NULL-terminated array of strings owned by GLib that must
2760 *               not be modified or freed.
2761 * Since: 2.6
2762 **/
2763G_CONST_RETURN gchar * G_CONST_RETURN *
2764g_get_system_config_dirs (void)
2765{
2766  gchar *conf_dirs, **conf_dir_vector;
2767
2768  G_LOCK (g_utils_global);
2769
2770  if (!g_system_config_dirs)
2771    {
2772#ifdef G_OS_WIN32
2773      conf_dirs = get_special_folder (CSIDL_COMMON_APPDATA);
2774      if (conf_dirs)
2775	{
2776	  conf_dir_vector = g_strsplit (conf_dirs, G_SEARCHPATH_SEPARATOR_S, 0);
2777	  g_free (conf_dirs);
2778	}
2779      else
2780	{
2781	  /* Return empty list */
2782	  conf_dir_vector = g_strsplit ("", G_SEARCHPATH_SEPARATOR_S, 0);
2783	}
2784#else
2785      conf_dirs = (gchar *) g_getenv ("XDG_CONFIG_DIRS");
2786
2787      if (!conf_dirs || !conf_dirs[0])
2788          conf_dirs = "/etc/xdg";
2789
2790      conf_dir_vector = g_strsplit (conf_dirs, G_SEARCHPATH_SEPARATOR_S, 0);
2791#endif
2792
2793      g_system_config_dirs = conf_dir_vector;
2794    }
2795  else
2796    conf_dir_vector = g_system_config_dirs;
2797  G_UNLOCK (g_utils_global);
2798
2799  return (G_CONST_RETURN gchar * G_CONST_RETURN *) conf_dir_vector;
2800}
2801
2802#ifndef G_OS_WIN32
2803
2804static GHashTable *alias_table = NULL;
2805
2806/* read an alias file for the locales */
2807static void
2808read_aliases (gchar *file)
2809{
2810  FILE *fp;
2811  char buf[256];
2812
2813  if (!alias_table)
2814    alias_table = g_hash_table_new (g_str_hash, g_str_equal);
2815  fp = fopen (file,"r");
2816  if (!fp)
2817    return;
2818  while (fgets (buf, 256, fp))
2819    {
2820      char *p, *q;
2821
2822      g_strstrip (buf);
2823
2824      /* Line is a comment */
2825      if ((buf[0] == '#') || (buf[0] == '\0'))
2826	continue;
2827
2828      /* Reads first column */
2829      for (p = buf, q = NULL; *p; p++) {
2830	if ((*p == '\t') || (*p == ' ') || (*p == ':')) {
2831	  *p = '\0';
2832	  q = p+1;
2833	  while ((*q == '\t') || (*q == ' ')) {
2834	    q++;
2835	  }
2836	  break;
2837	}
2838      }
2839      /* The line only had one column */
2840      if (!q || *q == '\0')
2841	continue;
2842
2843      /* Read second column */
2844      for (p = q; *p; p++) {
2845	if ((*p == '\t') || (*p == ' ')) {
2846	  *p = '\0';
2847	  break;
2848	}
2849      }
2850
2851      /* Add to alias table if necessary */
2852      if (!g_hash_table_lookup (alias_table, buf)) {
2853	g_hash_table_insert (alias_table, g_strdup (buf), g_strdup (q));
2854      }
2855    }
2856  fclose (fp);
2857}
2858
2859#endif
2860
2861static char *
2862unalias_lang (char *lang)
2863{
2864#ifndef G_OS_WIN32
2865  char *p;
2866  int i;
2867
2868  if (!alias_table)
2869    read_aliases ("/usr/share/locale/locale.alias");
2870
2871  i = 0;
2872  while ((p = g_hash_table_lookup (alias_table, lang)) && (strcmp (p, lang) != 0))
2873    {
2874      lang = p;
2875      if (i++ == 30)
2876        {
2877          static gboolean said_before = FALSE;
2878	  if (!said_before)
2879            g_warning ("Too many alias levels for a locale, "
2880		       "may indicate a loop");
2881	  said_before = TRUE;
2882	  return lang;
2883	}
2884    }
2885#endif
2886  return lang;
2887}
2888
2889/* Mask for components of locale spec. The ordering here is from
2890 * least significant to most significant
2891 */
2892enum
2893{
2894  COMPONENT_CODESET =   1 << 0,
2895  COMPONENT_TERRITORY = 1 << 1,
2896  COMPONENT_MODIFIER =  1 << 2
2897};
2898
2899/* Break an X/Open style locale specification into components
2900 */
2901static guint
2902explode_locale (const gchar *locale,
2903		gchar      **language,
2904		gchar      **territory,
2905		gchar      **codeset,
2906		gchar      **modifier)
2907{
2908  const gchar *uscore_pos;
2909  const gchar *at_pos;
2910  const gchar *dot_pos;
2911
2912  guint mask = 0;
2913
2914  uscore_pos = strchr (locale, '_');
2915  dot_pos = strchr (uscore_pos ? uscore_pos : locale, '.');
2916  at_pos = strchr (dot_pos ? dot_pos : (uscore_pos ? uscore_pos : locale), '@');
2917
2918  if (at_pos)
2919    {
2920      mask |= COMPONENT_MODIFIER;
2921      *modifier = g_strdup (at_pos);
2922    }
2923  else
2924    at_pos = locale + strlen (locale);
2925
2926  if (dot_pos)
2927    {
2928      mask |= COMPONENT_CODESET;
2929      *codeset = g_strndup (dot_pos, at_pos - dot_pos);
2930    }
2931  else
2932    dot_pos = at_pos;
2933
2934  if (uscore_pos)
2935    {
2936      mask |= COMPONENT_TERRITORY;
2937      *territory = g_strndup (uscore_pos, dot_pos - uscore_pos);
2938    }
2939  else
2940    uscore_pos = dot_pos;
2941
2942  *language = g_strndup (locale, uscore_pos - locale);
2943
2944  return mask;
2945}
2946
2947/*
2948 * Compute all interesting variants for a given locale name -
2949 * by stripping off different components of the value.
2950 *
2951 * For simplicity, we assume that the locale is in
2952 * X/Open format: language[_territory][.codeset][@modifier]
2953 *
2954 * TODO: Extend this to handle the CEN format (see the GNUlibc docs)
2955 *       as well. We could just copy the code from glibc wholesale
2956 *       but it is big, ugly, and complicated, so I'm reluctant
2957 *       to do so when this should handle 99% of the time...
2958 */
2959GSList *
2960_g_compute_locale_variants (const gchar *locale)
2961{
2962  GSList *retval = NULL;
2963
2964  gchar *language = NULL;
2965  gchar *territory = NULL;
2966  gchar *codeset = NULL;
2967  gchar *modifier = NULL;
2968
2969  guint mask;
2970  guint i;
2971
2972  g_return_val_if_fail (locale != NULL, NULL);
2973
2974  mask = explode_locale (locale, &language, &territory, &codeset, &modifier);
2975
2976  /* Iterate through all possible combinations, from least attractive
2977   * to most attractive.
2978   */
2979  for (i = 0; i <= mask; i++)
2980    if ((i & ~mask) == 0)
2981      {
2982	gchar *val = g_strconcat (language,
2983				  (i & COMPONENT_TERRITORY) ? territory : "",
2984				  (i & COMPONENT_CODESET) ? codeset : "",
2985				  (i & COMPONENT_MODIFIER) ? modifier : "",
2986				  NULL);
2987	retval = g_slist_prepend (retval, val);
2988      }
2989
2990  g_free (language);
2991  if (mask & COMPONENT_CODESET)
2992    g_free (codeset);
2993  if (mask & COMPONENT_TERRITORY)
2994    g_free (territory);
2995  if (mask & COMPONENT_MODIFIER)
2996    g_free (modifier);
2997
2998  return retval;
2999}
3000
3001/* The following is (partly) taken from the gettext package.
3002   Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.  */
3003
3004static const gchar *
3005guess_category_value (const gchar *category_name)
3006{
3007  const gchar *retval;
3008
3009  /* The highest priority value is the `LANGUAGE' environment
3010     variable.  This is a GNU extension.  */
3011  retval = g_getenv ("LANGUAGE");
3012  if ((retval != NULL) && (retval[0] != '\0'))
3013    return retval;
3014
3015  /* `LANGUAGE' is not set.  So we have to proceed with the POSIX
3016     methods of looking to `LC_ALL', `LC_xxx', and `LANG'.  On some
3017     systems this can be done by the `setlocale' function itself.  */
3018
3019  /* Setting of LC_ALL overwrites all other.  */
3020  retval = g_getenv ("LC_ALL");
3021  if ((retval != NULL) && (retval[0] != '\0'))
3022    return retval;
3023
3024  /* Next comes the name of the desired category.  */
3025  retval = g_getenv (category_name);
3026  if ((retval != NULL) && (retval[0] != '\0'))
3027    return retval;
3028
3029  /* Last possibility is the LANG environment variable.  */
3030  retval = g_getenv ("LANG");
3031  if ((retval != NULL) && (retval[0] != '\0'))
3032    return retval;
3033
3034#ifdef G_PLATFORM_WIN32
3035  /* g_win32_getlocale() first checks for LC_ALL, LC_MESSAGES and
3036   * LANG, which we already did above. Oh well. The main point of
3037   * calling g_win32_getlocale() is to get the thread's locale as used
3038   * by Windows and the Microsoft C runtime (in the "English_United
3039   * States" format) translated into the Unixish format.
3040   */
3041  retval = g_win32_getlocale ();
3042  if ((retval != NULL) && (retval[0] != '\0'))
3043    return retval;
3044#endif
3045
3046  return NULL;
3047}
3048
3049typedef struct _GLanguageNamesCache GLanguageNamesCache;
3050
3051struct _GLanguageNamesCache {
3052  gchar *languages;
3053  gchar **language_names;
3054};
3055
3056static void
3057language_names_cache_free (gpointer data)
3058{
3059  GLanguageNamesCache *cache = data;
3060  g_free (cache->languages);
3061  g_strfreev (cache->language_names);
3062  g_free (cache);
3063}
3064
3065/**
3066 * g_get_language_names:
3067 *
3068 * Computes a list of applicable locale names, which can be used to
3069 * e.g. construct locale-dependent filenames or search paths. The returned
3070 * list is sorted from most desirable to least desirable and always contains
3071 * the default locale "C".
3072 *
3073 * For example, if LANGUAGE=de:en_US, then the returned list is
3074 * "de", "en_US", "en", "C".
3075 *
3076 * This function consults the environment variables <envar>LANGUAGE</envar>,
3077 * <envar>LC_ALL</envar>, <envar>LC_MESSAGES</envar> and <envar>LANG</envar>
3078 * to find the list of locales specified by the user.
3079 *
3080 * Return value: a %NULL-terminated array of strings owned by GLib
3081 *    that must not be modified or freed.
3082 *
3083 * Since: 2.6
3084 **/
3085G_CONST_RETURN gchar * G_CONST_RETURN *
3086g_get_language_names (void)
3087{
3088  static GStaticPrivate cache_private = G_STATIC_PRIVATE_INIT;
3089  GLanguageNamesCache *cache = g_static_private_get (&cache_private);
3090  const gchar *value;
3091
3092  if (!cache)
3093    {
3094      cache = g_new0 (GLanguageNamesCache, 1);
3095      g_static_private_set (&cache_private, cache, language_names_cache_free);
3096    }
3097
3098  value = guess_category_value ("LC_MESSAGES");
3099  if (!value)
3100    value = "C";
3101
3102  if (!(cache->languages && strcmp (cache->languages, value) == 0))
3103    {
3104      gchar **languages;
3105      gchar **alist, **a;
3106      GSList *list, *l;
3107      gint i;
3108
3109      g_free (cache->languages);
3110      g_strfreev (cache->language_names);
3111      cache->languages = g_strdup (value);
3112
3113      alist = g_strsplit (value, ":", 0);
3114      list = NULL;
3115      for (a = alist; *a; a++)
3116	{
3117	  gchar *b = unalias_lang (*a);
3118	  list = g_slist_concat (list, _g_compute_locale_variants (b));
3119	}
3120      g_strfreev (alist);
3121      list = g_slist_append (list, g_strdup ("C"));
3122
3123      cache->language_names = languages = g_new (gchar *, g_slist_length (list) + 1);
3124      for (l = list, i = 0; l; l = l->next, i++)
3125	languages[i] = l->data;
3126      languages[i] = NULL;
3127
3128      g_slist_free (list);
3129    }
3130
3131  return (G_CONST_RETURN gchar * G_CONST_RETURN *) cache->language_names;
3132}
3133
3134/**
3135 * g_direct_hash:
3136 * @v: a #gpointer key
3137 *
3138 * Converts a gpointer to a hash value.
3139 * It can be passed to g_hash_table_new() as the @hash_func parameter,
3140 * when using pointers as keys in a #GHashTable.
3141 *
3142 * Returns: a hash value corresponding to the key.
3143 */
3144guint
3145g_direct_hash (gconstpointer v)
3146{
3147  return GPOINTER_TO_UINT (v);
3148}
3149
3150/**
3151 * g_direct_equal:
3152 * @v1: a key.
3153 * @v2: a key to compare with @v1.
3154 *
3155 * Compares two #gpointer arguments and returns %TRUE if they are equal.
3156 * It can be passed to g_hash_table_new() as the @key_equal_func
3157 * parameter, when using pointers as keys in a #GHashTable.
3158 *
3159 * Returns: %TRUE if the two keys match.
3160 */
3161gboolean
3162g_direct_equal (gconstpointer v1,
3163		gconstpointer v2)
3164{
3165  return v1 == v2;
3166}
3167
3168/**
3169 * g_int_equal:
3170 * @v1: a pointer to a #gint key.
3171 * @v2: a pointer to a #gint key to compare with @v1.
3172 *
3173 * Compares the two #gint values being pointed to and returns
3174 * %TRUE if they are equal.
3175 * It can be passed to g_hash_table_new() as the @key_equal_func
3176 * parameter, when using pointers to integers as keys in a #GHashTable.
3177 *
3178 * Returns: %TRUE if the two keys match.
3179 */
3180gboolean
3181g_int_equal (gconstpointer v1,
3182	     gconstpointer v2)
3183{
3184  return *((const gint*) v1) == *((const gint*) v2);
3185}
3186
3187/**
3188 * g_int_hash:
3189 * @v: a pointer to a #gint key
3190 *
3191 * Converts a pointer to a #gint to a hash value.
3192 * It can be passed to g_hash_table_new() as the @hash_func parameter,
3193 * when using pointers to integers values as keys in a #GHashTable.
3194 *
3195 * Returns: a hash value corresponding to the key.
3196 */
3197guint
3198g_int_hash (gconstpointer v)
3199{
3200  return *(const gint*) v;
3201}
3202
3203/**
3204 * g_nullify_pointer:
3205 * @nullify_location: the memory address of the pointer.
3206 *
3207 * Set the pointer at the specified location to %NULL.
3208 **/
3209void
3210g_nullify_pointer (gpointer *nullify_location)
3211{
3212  g_return_if_fail (nullify_location != NULL);
3213
3214  *nullify_location = NULL;
3215}
3216
3217/**
3218 * g_get_codeset:
3219 *
3220 * Get the codeset for the current locale.
3221 *
3222 * Return value: a newly allocated string containing the name
3223 * of the codeset. This string must be freed with g_free().
3224 **/
3225gchar *
3226g_get_codeset (void)
3227{
3228  const gchar *charset;
3229
3230  g_get_charset (&charset);
3231
3232  return g_strdup (charset);
3233}
3234
3235/* This is called from g_thread_init(). It's used to
3236 * initialize some static data in a threadsafe way.
3237 */
3238void
3239_g_utils_thread_init (void)
3240{
3241  g_get_language_names ();
3242}
3243
3244#ifdef G_OS_WIN32
3245
3246/**
3247 * _glib_get_locale_dir:
3248 *
3249 * Return the path to the share\locale or lib\locale subfolder of the
3250 * GLib installation folder. The path is in the system codepage. We
3251 * have to use system codepage as bindtextdomain() doesn't have a
3252 * UTF-8 interface.
3253 */
3254static gchar *
3255_glib_get_locale_dir (void)
3256{
3257  gchar *install_dir = NULL, *locale_dir;
3258  gchar *retval = NULL;
3259
3260  if (glib_dll != NULL)
3261    install_dir = g_win32_get_package_installation_directory_of_module (glib_dll);
3262
3263  if (install_dir)
3264    {
3265      /*
3266       * Append "/share/locale" or "/lib/locale" depending on whether
3267       * autoconfigury detected GNU gettext or not.
3268       */
3269      const char *p = GLIB_LOCALE_DIR + strlen (GLIB_LOCALE_DIR);
3270      while (*--p != '/')
3271	;
3272      while (*--p != '/')
3273	;
3274
3275      locale_dir = g_build_filename (install_dir, p, NULL);
3276
3277      retval = g_win32_locale_filename_from_utf8 (locale_dir);
3278
3279      g_free (install_dir);
3280      g_free (locale_dir);
3281    }
3282
3283  if (retval)
3284    return retval;
3285  else
3286    return g_strdup ("");
3287}
3288
3289#undef GLIB_LOCALE_DIR
3290
3291#endif /* G_OS_WIN32 */
3292
3293/**
3294 * glib_gettext:
3295 * @str: The string to be translated
3296 *
3297 * Returns the translated string from the glib translations.
3298 * This is an internal function and should only be used by
3299 * the internals of glib (such as libgio).
3300 *
3301 * Returns: the transation of @str to the current locale
3302 */
3303G_CONST_RETURN gchar *
3304glib_gettext (const gchar *str)
3305{
3306  static gboolean _glib_gettext_initialized = FALSE;
3307
3308  if (!_glib_gettext_initialized)
3309    {
3310#ifdef G_OS_WIN32
3311      gchar *tmp = _glib_get_locale_dir ();
3312      bindtextdomain (GETTEXT_PACKAGE, tmp);
3313      g_free (tmp);
3314#else
3315      bindtextdomain (GETTEXT_PACKAGE, GLIB_LOCALE_DIR);
3316#endif
3317#    ifdef HAVE_BIND_TEXTDOMAIN_CODESET
3318      bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
3319#    endif
3320      _glib_gettext_initialized = TRUE;
3321    }
3322
3323  return g_dgettext (GETTEXT_PACKAGE, str);
3324}
3325
3326#if defined (G_OS_WIN32) && !defined (_WIN64)
3327
3328/* Binary compatibility versions. Not for newly compiled code. */
3329
3330#undef g_find_program_in_path
3331
3332gchar*
3333g_find_program_in_path (const gchar *program)
3334{
3335  gchar *utf8_program = g_locale_to_utf8 (program, -1, NULL, NULL, NULL);
3336  gchar *utf8_retval = g_find_program_in_path_utf8 (utf8_program);
3337  gchar *retval;
3338
3339  g_free (utf8_program);
3340  if (utf8_retval == NULL)
3341    return NULL;
3342  retval = g_locale_from_utf8 (utf8_retval, -1, NULL, NULL, NULL);
3343  g_free (utf8_retval);
3344
3345  return retval;
3346}
3347
3348#undef g_get_current_dir
3349
3350gchar*
3351g_get_current_dir (void)
3352{
3353  gchar *utf8_dir = g_get_current_dir_utf8 ();
3354  gchar *dir = g_locale_from_utf8 (utf8_dir, -1, NULL, NULL, NULL);
3355  g_free (utf8_dir);
3356  return dir;
3357}
3358
3359#undef g_getenv
3360
3361G_CONST_RETURN gchar*
3362g_getenv (const gchar *variable)
3363{
3364  gchar *utf8_variable = g_locale_to_utf8 (variable, -1, NULL, NULL, NULL);
3365  const gchar *utf8_value = g_getenv_utf8 (utf8_variable);
3366  gchar *value;
3367  GQuark quark;
3368
3369  g_free (utf8_variable);
3370  if (!utf8_value)
3371    return NULL;
3372  value = g_locale_from_utf8 (utf8_value, -1, NULL, NULL, NULL);
3373  quark = g_quark_from_string (value);
3374  g_free (value);
3375
3376  return g_quark_to_string (quark);
3377}
3378
3379#undef g_setenv
3380
3381gboolean
3382g_setenv (const gchar *variable,
3383	  const gchar *value,
3384	  gboolean     overwrite)
3385{
3386  gchar *utf8_variable = g_locale_to_utf8 (variable, -1, NULL, NULL, NULL);
3387  gchar *utf8_value = g_locale_to_utf8 (value, -1, NULL, NULL, NULL);
3388  gboolean retval = g_setenv_utf8 (utf8_variable, utf8_value, overwrite);
3389
3390  g_free (utf8_variable);
3391  g_free (utf8_value);
3392
3393  return retval;
3394}
3395
3396#undef g_unsetenv
3397
3398void
3399g_unsetenv (const gchar *variable)
3400{
3401  gchar *utf8_variable = g_locale_to_utf8 (variable, -1, NULL, NULL, NULL);
3402
3403  g_unsetenv_utf8 (utf8_variable);
3404
3405  g_free (utf8_variable);
3406}
3407
3408#undef g_get_user_name
3409
3410G_CONST_RETURN gchar*
3411g_get_user_name (void)
3412{
3413  g_get_any_init_locked ();
3414  return g_user_name_cp;
3415}
3416
3417#undef g_get_real_name
3418
3419G_CONST_RETURN gchar*
3420g_get_real_name (void)
3421{
3422  g_get_any_init_locked ();
3423  return g_real_name_cp;
3424}
3425
3426#undef g_get_home_dir
3427
3428G_CONST_RETURN gchar*
3429g_get_home_dir (void)
3430{
3431  g_get_any_init_locked ();
3432  return g_home_dir_cp;
3433}
3434
3435#undef g_get_tmp_dir
3436
3437G_CONST_RETURN gchar*
3438g_get_tmp_dir (void)
3439{
3440  g_get_any_init_locked ();
3441  return g_tmp_dir_cp;
3442}
3443
3444#endif
3445
3446#define __G_UTILS_C__
3447#include "galiasdef.c"
3448