gutils.c

   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 Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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  * MT safe for the unix part, FIXME: make the win32 part MT safe as well.
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include "glibconfig.h"
  29
  30 #ifdef HAVE_UNISTD_H
  31 #include <unistd.h>
  32 #endif
  33 #include <stdarg.h>
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <errno.h>
  38 #ifdef HAVE_PWD_H
  39 #include <pwd.h>
  40 #endif
  41 #include <sys/types.h>
  42 #ifdef HAVE_SYS_PARAM_H
  43 #include <sys/param.h>
  44 #endif
  45
  46 #ifdef NATIVE_WIN32
  47 #  define STRICT                        /* Strict typing, please */
  48 #  include <windows.h>
  49 #  include <direct.h>
  50 #  include <errno.h>
  51 #  include <ctype.h>
  52 #  ifdef _MSC_VER
  53 #    include <io.h>
  54 #  endif /* _MSC_VER */
  55 #endif /* NATIVE_WIN32 */
  56
  57 /* implement Glib's inline functions
  58  */
  59 #define G_INLINE_FUNC extern
  60 #define G_CAN_INLINE 1
  61 #include "glib.h"
  62
  63 #ifdef  MAXPATHLEN
  64 #define G_PATH_LENGTH   (MAXPATHLEN + 1)
  65 #elif   defined (PATH_MAX)
  66 #define G_PATH_LENGTH   (PATH_MAX + 1)
  67 #else   /* !MAXPATHLEN */
  68 #define G_PATH_LENGTH   (2048 + 1)
  69 #endif  /* !MAXPATHLEN && !PATH_MAX */
  70
  71 const guint glib_major_version = GLIB_MAJOR_VERSION;
  72 const guint glib_minor_version = GLIB_MINOR_VERSION;
  73 const guint glib_micro_version = GLIB_MICRO_VERSION;
  74 const guint glib_interface_age = GLIB_INTERFACE_AGE;
  75 const guint glib_binary_age = GLIB_BINARY_AGE;
  76
  77 #if defined (NATIVE_WIN32) && defined (__LCC__)
  78 int __stdcall
  79 LibMain (void         *hinstDll,
  80          unsigned long dwReason,
  81          void         *reserved)
  82 {
  83   return 1;
  84 }
  85 #endif /* NATIVE_WIN32 && __LCC__ */
  86
  87 void
  88 g_atexit (GVoidFunc func)
  89 {
  90   gint result;
  91   gchar *error = NULL;
  92
  93   /* keep this in sync with glib.h */
  94
  95 #ifdef  G_NATIVE_ATEXIT
  96   result = ATEXIT (func);
  97   if (result)
  98     error = g_strerror (errno);
  99 #elif defined (HAVE_ATEXIT)
 100 #  ifdef NeXT /* @#%@! NeXTStep */
 101   result = !atexit ((void (*)(void)) func);
 102   if (result)
 103     error = g_strerror (errno);
 104 #  else
 105   result = atexit ((void (*)(void)) func);
 106   if (result)
 107     error = g_strerror (errno);
 108 #  endif /* NeXT */
 109 #elif defined (HAVE_ON_EXIT)
 110   result = on_exit ((void (*)(int, void *)) func, NULL);
 111   if (result)
 112     error = g_strerror (errno);
 113 #else
 114   result = 0;
 115   error = "no implementation";
 116 #endif /* G_NATIVE_ATEXIT */
 117
 118   if (error)
 119     g_error ("Could not register atexit() function: %s", error);
 120 }
 121
 122 gint
 123 g_snprintf (gchar       *str,
 124             gulong       n,
 125             gchar const *fmt,
 126             ...)
 127 {
 128 #ifdef  HAVE_VSNPRINTF
 129   va_list args;
 130   gint retval;
 131
 132   va_start (args, fmt);
 133   retval = vsnprintf (str, n, fmt, args);
 134   va_end (args);
 135
 136   return retval;
 137 #else   /* !HAVE_VSNPRINTF */
 138   gchar *printed;
 139   va_list args;
 140
 141   va_start (args, fmt);
 142   printed = g_strdup_vprintf (fmt, args);
 143   va_end (args);
 144
 145   strncpy (str, printed, n);
 146   str[n-1] = '\0';
 147
 148   g_free (printed);
 149
 150   return strlen (str);
 151 #endif  /* !HAVE_VSNPRINTF */
 152 }
 153
 154 gint
 155 g_vsnprintf (gchar       *str,
 156              gulong       n,
 157              gchar const *fmt,
 158              va_list      args)
 159 {
 160 #ifdef  HAVE_VSNPRINTF
 161   gint retval;
 162
 163   retval = vsnprintf (str, n, fmt, args);
 164
 165   return retval;
 166 #else   /* !HAVE_VSNPRINTF */
 167   gchar *printed;
 168
 169   printed = g_strdup_vprintf (fmt, args);
 170   strncpy (str, printed, n);
 171   str[n-1] = '\0';
 172
 173   g_free (printed);
 174
 175   return strlen (str);
 176 #endif /* !HAVE_VSNPRINTF */
 177 }
 178
 179 guint
 180 g_parse_debug_string  (const gchar *string,
 181                        GDebugKey   *keys,
 182                        guint        nkeys)
 183 {
 184   guint i;
 185   guint result = 0;
 186
 187   g_return_val_if_fail (string != NULL, 0);
 188
 189   if (!g_strcasecmp (string, "all"))
 190     {
 191       for (i=0; i<nkeys; i++)
 192         result |= keys[i].value;
 193     }
 194   else
 195     {
 196       gchar *str = g_strdup (string);
 197       gchar *p = str;
 198       gchar *q;
 199       gboolean done = FALSE;
 200
 201       while (*p && !done)
 202         {
 203           q = strchr (p, ':');
 204           if (!q)
 205             {
 206               q = p + strlen(p);
 207               done = TRUE;
 208             }
 209
 210           *q = 0;
 211
 212           for (i=0; i<nkeys; i++)
 213             if (!g_strcasecmp(keys[i].key, p))
 214               result |= keys[i].value;
 215
 216           p = q+1;
 217         }
 218
 219       g_free (str);
 220     }
 221
 222   return result;
 223 }
 224
 225 gchar*
 226 g_basename (const gchar    *file_name)
 227 {
 228   register gchar *base;
 229
 230   g_return_val_if_fail (file_name != NULL, NULL);
 231
 232   base = strrchr (file_name, G_DIR_SEPARATOR);
 233   if (base)
 234     return base + 1;
 235
 236 #ifdef NATIVE_WIN32
 237   if (isalpha (file_name[0]) && file_name[1] == ':')
 238     return (gchar*) file_name + 2;
 239 #endif /* NATIVE_WIN32 */
 240
 241   return (gchar*) file_name;
 242 }
 243
 244 gboolean
 245 g_path_is_absolute (const gchar *file_name)
 246 {
 247   g_return_val_if_fail (file_name != NULL, FALSE);
 248
 249   if (file_name[0] == G_DIR_SEPARATOR)
 250     return TRUE;
 251
 252 #ifdef NATIVE_WIN32
 253   if (isalpha (file_name[0]) && file_name[1] == ':' && file_name[2] == G_DIR_SEPARATOR)
 254     return TRUE;
 255 #endif
 256
 257   return FALSE;
 258 }
 259
 260 gchar*
 261 g_path_skip_root (gchar *file_name)
 262 {
 263   g_return_val_if_fail (file_name != NULL, NULL);
 264
 265   if (file_name[0] == G_DIR_SEPARATOR)
 266     return file_name + 1;
 267
 268 #ifdef NATIVE_WIN32
 269   if (isalpha (file_name[0]) && file_name[1] == ':' && file_name[2] == G_DIR_SEPARATOR)
 270     return file_name + 3;
 271 #endif
 272
 273   return NULL;
 274 }
 275
 276 gchar*
 277 g_dirname (const gchar     *file_name)
 278 {
 279   register gchar *base;
 280   register guint len;
 281
 282   g_return_val_if_fail (file_name != NULL, NULL);
 283
 284   base = strrchr (file_name, G_DIR_SEPARATOR);
 285   if (!base)
 286     return g_strdup (".");
 287   while (base > file_name && *base == G_DIR_SEPARATOR)
 288     base--;
 289   len = (guint) 1 + base - file_name;
 290
 291   base = g_new (gchar, len + 1);
 292   g_memmove (base, file_name, len);
 293   base[len] = 0;
 294
 295   return base;
 296 }
 297
 298 gchar*
 299 g_get_current_dir (void)
 300 {
 301   gchar *buffer;
 302   gchar *dir;
 303
 304   buffer = g_new (gchar, G_PATH_LENGTH);
 305   *buffer = 0;
 306
 307   /* We don't use getcwd(3) on SUNOS, because, it does a popen("pwd")
 308    * and, if that wasn't bad enough, hangs in doing so.
 309    */
 310 #if     defined (sun) && !defined (__SVR4)
 311   dir = getwd (buffer);
 312 #else   /* !sun */
 313   dir = getcwd (buffer, G_PATH_LENGTH - 1);
 314 #endif  /* !sun */
 315
 316   if (!dir || !*buffer)
 317     {
 318       /* hm, should we g_error() out here?
 319        * this can happen if e.g. "./" has mode \0000
 320        */
 321       buffer[0] = G_DIR_SEPARATOR;
 322       buffer[1] = 0;
 323     }
 324
 325   dir = g_strdup (buffer);
 326   g_free (buffer);
 327
 328   return dir;
 329 }
 330
 331 gchar*
 332 g_getenv (const gchar *variable)
 333 {
 334 #ifndef NATIVE_WIN32
 335   g_return_val_if_fail (variable != NULL, NULL);
 336
 337   return getenv (variable);
 338 #else
 339   gchar *v;
 340   guint k;
 341   static gchar *p = NULL;
 342   static gint l;
 343   gchar dummy[2];
 344
 345   g_return_val_if_fail (variable != NULL, NULL);
 346
 347   v = getenv (variable);
 348   if (!v)
 349     return NULL;
 350
 351   /* On Windows NT, it is relatively typical that environment variables
 352    * contain references to other environment variables. Handle that by
 353    * calling ExpandEnvironmentStrings.
 354    */
 355
 356   /* First check how much space we need */
 357   k = ExpandEnvironmentStrings (v, dummy, 2);
 358   /* Then allocate that much, and actualy do the expansion */
 359   if (p == NULL)
 360     {
 361       p = g_malloc (k);
 362       l = k;
 363     }
 364   else if (k > l)
 365     {
 366       p = g_realloc (p, k);
 367       l = k;
 368     }
 369   ExpandEnvironmentStrings (v, p, k);
 370   return p;
 371 #endif
 372 }
 373
 374
 375 G_LOCK_DECLARE_STATIC (g_utils_global);
 376
 377 static  gchar   *g_tmp_dir = NULL;
 378 static  gchar   *g_user_name = NULL;
 379 static  gchar   *g_real_name = NULL;
 380 static  gchar   *g_home_dir = NULL;
 381
 382 /* HOLDS: g_utils_global_lock */
 383 static void
 384 g_get_any_init (void)
 385 {
 386   if (!g_tmp_dir)
 387     {
 388       g_tmp_dir = g_strdup (g_getenv ("TMPDIR"));
 389       if (!g_tmp_dir)
 390         g_tmp_dir = g_strdup (g_getenv ("TMP"));
 391       if (!g_tmp_dir)
 392         g_tmp_dir = g_strdup (g_getenv ("TEMP"));
 393
 394 #ifdef P_tmpdir
 395       if (!g_tmp_dir)
 396         {
 397           int k;
 398           g_tmp_dir = g_strdup (P_tmpdir);
 399           k = strlen (g_tmp_dir);
 400           if (g_tmp_dir[k-1] == G_DIR_SEPARATOR)
 401             g_tmp_dir[k-1] = '\0';
 402         }
 403 #endif
 404
 405       if (!g_tmp_dir)
 406         {
 407 #ifndef NATIVE_WIN32
 408           g_tmp_dir = g_strdup ("/tmp");
 409 #else /* NATIVE_WIN32 */
 410           g_tmp_dir = g_strdup ("C:\\");
 411 #endif /* NATIVE_WIN32 */
 412         }
 413
 414       if (!g_home_dir)
 415         g_home_dir = g_strdup (g_getenv ("HOME"));
 416
 417 #ifdef NATIVE_WIN32
 418       if (!g_home_dir)
 419         {
 420           /* The official way to specify a home directory on NT is
 421            * the HOMEDRIVE and HOMEPATH environment variables.
 422            *
 423            * This is inside #ifdef NATIVE_WIN32 because with the cygwin dll,
 424            * HOME should be a POSIX style pathname.
 425            */
 426
 427           if (getenv ("HOMEDRIVE") != NULL && getenv ("HOMEPATH") != NULL)
 428             {
 429               gchar *homedrive, *homepath;
 430
 431               homedrive = g_strdup (g_getenv ("HOMEDRIVE"));
 432               homepath = g_strdup (g_getenv ("HOMEPATH"));
 433
 434               g_home_dir = g_strconcat (homedrive, homepath, NULL);
 435               g_free (homedrive);
 436               g_free (homepath);
 437             }
 438         }
 439 #endif /* !NATIVE_WIN32 */
 440
 441 #ifdef HAVE_PWD_H
 442       {
 443         struct passwd *pw = NULL;
 444         gpointer buffer = NULL;
 445
 446 #  ifdef HAVE_GETPWUID_R
 447         struct passwd pwd;
 448         guint bufsize = 64;
 449         gint error;
 450
 451         while (1)
 452           {
 453             g_free (buffer);
 454             buffer = g_malloc (bufsize);
 455             errno = 0;
 456
 457 #    ifdef HAVE_GETPWUID_R_POSIX
 458             error = getpwuid_r (getuid (), &pwd, buffer, bufsize, &pw);
 459             error = error < 0 ? errno : error;
 460 #    else /* !HAVE_GETPWUID_R_POSIX */
 461             pw = getpwuid_r (getuid (), &pwd, buffer, bufsize);
 462             error = pw ? 0 : errno;
 463 #    endif /* !HAVE_GETPWUID_R_POSIX */
 464
 465             /* Now there are actually only 3 cases to leave the loop:
 466                1. pw != NULL -> all went fine.
 467                2. pw == NULL && ( error == 0 || error == ENOENT )
 468                     -> no such user (unlikely in the case of getuid ())
 469                3. bufsize > 32k -> the problem can't be of ERANGE type */
 470             if (pw)
 471               break;
 472
 473             if (pw == NULL && ( error == 0 || error == ENOENT))
 474               {
 475                 g_warning ("getpwuid_r(): failed due to: No such user %d.",
 476                            getuid ());
 477                 break;
 478               }
 479
 480             if (bufsize > 32 * 1024)
 481               {
 482                 g_warning ("getpwuid_r(): failed due to: %s.",
 483                            g_strerror (error));
 484                 break;
 485               }
 486
 487             bufsize *= 2;
 488          }
 489 #  endif /* !HAVE_GETPWUID_R */
 490
 491         if (!pw)
 492           {
 493             setpwent ();
 494             pw = getpwuid (getuid ());
 495             endpwent ();
 496           }
 497         if (pw)
 498           {
 499             g_user_name = g_strdup (pw->pw_name);
 500             g_real_name = g_strdup (pw->pw_gecos);
 501             if (!g_home_dir)
 502               g_home_dir = g_strdup (pw->pw_dir);
 503           }
 504         g_free (buffer);
 505       }
 506
 507 #else /* !HAVE_PWD_H */
 508
 509 #  ifdef NATIVE_WIN32
 510       {
 511         guint len = 17;
 512         gchar buffer[17];
 513
 514         if (GetUserName (buffer, &len))
 515           {
 516             g_user_name = g_strdup (buffer);
 517             g_real_name = g_strdup (buffer);
 518           }
 519       }
 520 #  endif /* NATIVE_WIN32 */
 521
 522 #endif /* !HAVE_PWD_H */
 523
 524       if (!g_user_name)
 525         g_user_name = g_strdup ("somebody");
 526       if (!g_real_name)
 527         g_real_name = g_strdup ("Unknown");
 528     }
 529 }
 530
 531 gchar*
 532 g_get_user_name (void)
 533 {
 534   G_LOCK (g_utils_global);
 535   if (!g_tmp_dir)
 536     g_get_any_init ();
 537   G_UNLOCK (g_utils_global);
 538
 539   return g_user_name;
 540 }
 541
 542 gchar*
 543 g_get_real_name (void)
 544 {
 545   G_LOCK (g_utils_global);
 546   if (!g_tmp_dir)
 547     g_get_any_init ();
 548   G_UNLOCK (g_utils_global);
 549
 550   return g_real_name;
 551 }
 552
 553 /* Return the home directory of the user. If there is a HOME
 554  * environment variable, its value is returned, otherwise use some
 555  * system-dependent way of finding it out. If no home directory can be
 556  * deduced, return NULL.
 557  */
 558
 559 gchar*
 560 g_get_home_dir (void)
 561 {
 562   G_LOCK (g_utils_global);
 563   if (!g_tmp_dir)
 564     g_get_any_init ();
 565   G_UNLOCK (g_utils_global);
 566
 567   return g_home_dir;
 568 }
 569
 570 /* Return a directory to be used to store temporary files. This is the
 571  * value of the TMPDIR, TMP or TEMP environment variables (they are
 572  * checked in that order). If none of those exist, use P_tmpdir from
 573  * stdio.h.  If that isn't defined, return "/tmp" on POSIXly systems,
 574  * and C:\ on Windows.
 575  */
 576
 577 gchar*
 578 g_get_tmp_dir (void)
 579 {
 580   G_LOCK (g_utils_global);
 581   if (!g_tmp_dir)
 582     g_get_any_init ();
 583   G_UNLOCK (g_utils_global);
 584
 585   return g_tmp_dir;
 586 }
 587
 588 static gchar *g_prgname = NULL;
 589
 590 gchar*
 591 g_get_prgname (void)
 592 {
 593   gchar* retval;
 594
 595   G_LOCK (g_utils_global);
 596   retval = g_prgname;
 597   G_UNLOCK (g_utils_global);
 598
 599   return retval;
 600 }
 601
 602 void
 603 g_set_prgname (const gchar *prgname)
 604 {
 605   gchar *c;
 606
 607   G_LOCK (g_utils_global);
 608   c = g_prgname;
 609   g_prgname = g_strdup (prgname);
 610   g_free (c);
 611   G_UNLOCK (g_utils_global);
 612 }
 613
 614 guint
 615 g_direct_hash (gconstpointer v)
 616 {
 617   return GPOINTER_TO_UINT (v);
 618 }
 619
 620 gint
 621 g_direct_equal (gconstpointer v1,
 622                 gconstpointer v2)
 623 {
 624   return GPOINTER_TO_UINT (v1) == GPOINTER_TO_UINT (v2);
 625 }
 626
 627 gint
 628 g_int_equal (gconstpointer v1,
 629              gconstpointer v2)
 630 {
 631   return *((const gint*) v1) == *((const gint*) v2);
 632 }
 633
 634 guint
 635 g_int_hash (gconstpointer v)
 636 {
 637   return *(const gint*) v;
 638 }
 639
 640 #if 0 /* Old IO Channels */
 641
 642 GIOChannel*
 643 g_iochannel_new (gint fd)
 644 {
 645   GIOChannel *channel = g_new (GIOChannel, 1);
 646
 647   channel->fd = fd;
 648
 649 #ifdef NATIVE_WIN32
 650   channel->peer = 0;
 651   channel->peer_fd = 0;
 652   channel->offset = 0;
 653   channel->need_wakeups = 0;
 654 #endif /* NATIVE_WIN32 */
 655
 656   return channel;
 657 }
 658
 659 void
 660 g_iochannel_free (GIOChannel *channel)
 661 {
 662   g_return_if_fail (channel != NULL);
 663
 664   g_free (channel);
 665 }
 666
 667 void
 668 g_iochannel_close_and_free (GIOChannel *channel)
 669 {
 670   g_return_if_fail (channel != NULL);
 671
 672   close (channel->fd);
 673
 674   g_iochannel_free (channel);
 675 }
 676
 677 #undef g_iochannel_wakeup_peer
 678
 679 void
 680 g_iochannel_wakeup_peer (GIOChannel *channel)
 681 {
 682 #ifdef NATIVE_WIN32
 683   static guint message = 0;
 684 #endif
 685
 686   g_return_if_fail (channel != NULL);
 687
 688 #ifdef NATIVE_WIN32
 689   if (message == 0)
 690     message = RegisterWindowMessage ("gdk-pipe-readable");
 691
 692 #  if 0
 693   g_print ("g_iochannel_wakeup_peer: calling PostThreadMessage (%#x, %d, %d, %d)\n",
 694            channel->peer, message, channel->peer_fd, channel->offset);
 695 #  endif
 696   PostThreadMessage (channel->peer, message,
 697                      channel->peer_fd, channel->offset);
 698 #endif /* NATIVE_WIN32 */
 699 }
 700
 701 #endif /* Old IO Channels */
 702
 703 #ifdef NATIVE_WIN32
 704 #ifdef _MSC_VER
 705
 706 int
 707 gwin_ftruncate (gint  fd,
 708                 guint size)
 709 {
 710   HANDLE hfile;
 711   guint curpos;
 712
 713   g_return_val_if_fail (fd >= 0, -1);
 714
 715   hfile = (HANDLE) _get_osfhandle (fd);
 716   curpos = SetFilePointer (hfile, 0, NULL, FILE_CURRENT);
 717   if (curpos == 0xFFFFFFFF
 718       || SetFilePointer (hfile, size, NULL, FILE_BEGIN) == 0xFFFFFFFF
 719       || !SetEndOfFile (hfile))
 720     {
 721       gint error = GetLastError ();
 722
 723       switch (error)
 724         {
 725         case ERROR_INVALID_HANDLE:
 726           errno = EBADF;
 727           break;
 728         default:
 729           errno = EIO;
 730           break;
 731         }
 732
 733       return -1;
 734     }
 735
 736   return 0;
 737 }
 738
 739 DIR*
 740 gwin_opendir (const char *dirname)
 741 {
 742   DIR *result;
 743   gchar *mask;
 744   guint k;
 745
 746   g_return_val_if_fail (dirname != NULL, NULL);
 747
 748   result = g_new0 (DIR, 1);
 749   result->find_file_data = g_new0 (WIN32_FIND_DATA, 1);
 750   result->dir_name = g_strdup (dirname);
 751
 752   k = strlen (result->dir_name);
 753   if (k && result->dir_name[k - 1] == '\\')
 754     {
 755       result->dir_name[k - 1] = '\0';
 756       k--;
 757     }
 758   mask = g_strdup_printf ("%s\\*", result->dir_name);
 759
 760   result->find_file_handle = (guint) FindFirstFile (mask,
 761                                              (LPWIN32_FIND_DATA) result->find_file_data);
 762   g_free (mask);
 763
 764   if (result->find_file_handle == (guint) INVALID_HANDLE_VALUE)
 765     {
 766       int error = GetLastError ();
 767
 768       g_free (result->dir_name);
 769       g_free (result->find_file_data);
 770       g_free (result);
 771       switch (error)
 772         {
 773         default:
 774           errno = EIO;
 775           return NULL;
 776         }
 777     }
 778   result->just_opened = TRUE;
 779
 780   return result;
 781 }
 782
 783 struct dirent*
 784 gwin_readdir (DIR *dir)
 785 {
 786   static struct dirent result;
 787
 788   g_return_val_if_fail (dir != NULL, NULL);
 789
 790   if (dir->just_opened)
 791     dir->just_opened = FALSE;
 792   else
 793     {
 794       if (!FindNextFile ((HANDLE) dir->find_file_handle,
 795                          (LPWIN32_FIND_DATA) dir->find_file_data))
 796         {
 797           int error = GetLastError ();
 798
 799           switch (error)
 800             {
 801             case ERROR_NO_MORE_FILES:
 802               return NULL;
 803             default:
 804               errno = EIO;
 805               return NULL;
 806             }
 807         }
 808     }
 809   strcpy (result.d_name, g_basename (((LPWIN32_FIND_DATA) dir->find_file_data)->cFileName));
 810
 811   return &result;
 812 }
 813
 814 void
 815 gwin_rewinddir (DIR *dir)
 816 {
 817   gchar *mask;
 818
 819   g_return_if_fail (dir != NULL);
 820
 821   if (!FindClose ((HANDLE) dir->find_file_handle))
 822     g_warning ("gwin_rewinddir(): FindClose() failed\n");
 823
 824   mask = g_strdup_printf ("%s\\*", dir->dir_name);
 825   dir->find_file_handle = (guint) FindFirstFile (mask,
 826                                           (LPWIN32_FIND_DATA) dir->find_file_data);
 827   g_free (mask);
 828
 829   if (dir->find_file_handle == (guint) INVALID_HANDLE_VALUE)
 830     {
 831       int error = GetLastError ();
 832
 833       switch (error)
 834         {
 835         default:
 836           errno = EIO;
 837           return;
 838         }
 839     }
 840   dir->just_opened = TRUE;
 841 }
 842
 843 gint
 844 gwin_closedir (DIR *dir)
 845 {
 846   g_return_val_if_fail (dir != NULL, -1);
 847
 848   if (!FindClose ((HANDLE) dir->find_file_handle))
 849     {
 850       int error = GetLastError ();
 851
 852       switch (error)
 853         {
 854         default:
 855           errno = EIO; return -1;
 856         }
 857     }
 858
 859   g_free (dir->dir_name);
 860   g_free (dir->find_file_data);
 861   g_free (dir);
 862
 863   return 0;
 864 }
 865
 866 #endif /* _MSC_VER */
 867
 868 #endif /* NATIVE_WIN32 */