1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* xdgmime.c: XDG Mime Spec mime resolver. Based on version 0.11 of the spec.
3 *
4 * More info can be found at http://www.freedesktop.org/standards/
5 *
6 * Copyright (C) 2003,2004 Red Hat, Inc.
7 * Copyright (C) 2003,2004 Jonathan Blandford <jrb@alum.mit.edu>
8 *
9 * Licensed under the Academic Free License version 2.0
10 * Or under the following terms:
11 *
12 * This library is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Lesser General Public
14 * License as published by the Free Software Foundation; either
15 * version 2 of the License, or (at your option) any later version.
16 *
17 * This library is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * Lesser General Public License for more details.
21 *
22 * You should have received a copy of the GNU Lesser General Public
23 * License along with this library; if not, write to the
24 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 * Boston, MA 02111-1307, USA.
26 */
27
28 #ifdef HAVE_CONFIG_H
29 #include <config.h>
30 #endif
31
32 #include "xdgmime.h"
33 #include "xdgmimeint.h"
34 #include "xdgmimeglob.h"
35 #include "xdgmimemagic.h"
36 #include "xdgmimealias.h"
37 #include "xdgmimeicon.h"
38 #include "xdgmimeparent.h"
39 #include "xdgmimecache.h"
40 #include <stdio.h>
41 #include <string.h>
42 #include <sys/stat.h>
43 #include <sys/types.h>
44 #include <sys/time.h>
45 #include <unistd.h>
46 #include <assert.h>
47
48 typedef struct XdgDirTimeList XdgDirTimeList;
49 typedef struct XdgCallbackList XdgCallbackList;
50
51 static int need_reread = TRUE;
52 static time_t last_stat_time = 0;
53
54 static XdgGlobHash *global_hash = NULL;
55 static XdgMimeMagic *global_magic = NULL;
56 static XdgAliasList *alias_list = NULL;
57 static XdgParentList *parent_list = NULL;
58 static XdgDirTimeList *dir_time_list = NULL;
59 static XdgCallbackList *callback_list = NULL;
60 static XdgIconList *icon_list = NULL;
61 static XdgIconList *generic_icon_list = NULL;
62
63 XdgMimeCache **_caches = NULL;
64 static int n_caches = 0;
65
66 const char xdg_mime_type_unknown[] = "application/octet-stream";
67 const char xdg_mime_type_empty[] = "application/x-zerosize";
68 const char xdg_mime_type_textplain[] = "text/plain";
69
70
71 enum
72 {
73 XDG_CHECKED_UNCHECKED,
74 XDG_CHECKED_VALID,
75 XDG_CHECKED_INVALID
76 };
77
78 struct XdgDirTimeList
79 {
80 time_t mtime;
81 char *directory_name;
82 int checked;
83 XdgDirTimeList *next;
84 };
85
86 struct XdgCallbackList
87 {
88 XdgCallbackList *next;
89 XdgCallbackList *prev;
90 int callback_id;
91 XdgMimeCallback callback;
92 void *data;
93 XdgMimeDestroy destroy;
94 };
95
96 /* Function called by xdg_run_command_on_dirs. If it returns TRUE, further
97 * directories aren't looked at */
98 typedef int (*XdgDirectoryFunc) (const char *directory,
99 void *user_data);
100
101 static void
xdg_dir_time_list_add(char * file_name,time_t mtime)102 xdg_dir_time_list_add (char *file_name,
103 time_t mtime)
104 {
105 XdgDirTimeList *list;
106
107 for (list = dir_time_list; list; list = list->next)
108 {
109 if (strcmp (list->directory_name, file_name) == 0)
110 {
111 free (file_name);
112 return;
113 }
114 }
115
116 list = calloc (1, sizeof (XdgDirTimeList));
117 list->checked = XDG_CHECKED_UNCHECKED;
118 list->directory_name = file_name;
119 list->mtime = mtime;
120 list->next = dir_time_list;
121 dir_time_list = list;
122 }
123
124 static void
xdg_dir_time_list_free(XdgDirTimeList * list)125 xdg_dir_time_list_free (XdgDirTimeList *list)
126 {
127 XdgDirTimeList *next;
128
129 while (list)
130 {
131 next = list->next;
132 free (list->directory_name);
133 free (list);
134 list = next;
135 }
136 }
137
138 static int
xdg_mime_init_from_directory(const char * directory)139 xdg_mime_init_from_directory (const char *directory)
140 {
141 char *file_name;
142 struct stat st;
143
144 assert (directory != NULL);
145
146 file_name = malloc (strlen (directory) + strlen ("/mime/mime.cache") + 1);
147 strcpy (file_name, directory); strcat (file_name, "/mime/mime.cache");
148 if (stat (file_name, &st) == 0)
149 {
150 XdgMimeCache *cache = _xdg_mime_cache_new_from_file (file_name);
151
152 if (cache != NULL)
153 {
154 xdg_dir_time_list_add (file_name, st.st_mtime);
155
156 _caches = realloc (_caches, sizeof (XdgMimeCache *) * (n_caches + 2));
157 _caches[n_caches] = cache;
158 _caches[n_caches + 1] = NULL;
159 n_caches++;
160
161 return FALSE;
162 }
163 }
164 free (file_name);
165
166 file_name = malloc (strlen (directory) + strlen ("/mime/globs2") + 1);
167 strcpy (file_name, directory); strcat (file_name, "/mime/globs2");
168 if (stat (file_name, &st) == 0)
169 {
170 _xdg_mime_glob_read_from_file (global_hash, file_name, TRUE);
171 xdg_dir_time_list_add (file_name, st.st_mtime);
172 }
173 else
174 {
175 free (file_name);
176 file_name = malloc (strlen (directory) + strlen ("/mime/globs") + 1);
177 strcpy (file_name, directory); strcat (file_name, "/mime/globs");
178 if (stat (file_name, &st) == 0)
179 {
180 _xdg_mime_glob_read_from_file (global_hash, file_name, FALSE);
181 xdg_dir_time_list_add (file_name, st.st_mtime);
182 }
183 else
184 {
185 free (file_name);
186 }
187 }
188
189 file_name = malloc (strlen (directory) + strlen ("/mime/magic") + 1);
190 strcpy (file_name, directory); strcat (file_name, "/mime/magic");
191 if (stat (file_name, &st) == 0)
192 {
193 _xdg_mime_magic_read_from_file (global_magic, file_name);
194 xdg_dir_time_list_add (file_name, st.st_mtime);
195 }
196 else
197 {
198 free (file_name);
199 }
200
201 file_name = malloc (strlen (directory) + strlen ("/mime/aliases") + 1);
202 strcpy (file_name, directory); strcat (file_name, "/mime/aliases");
203 _xdg_mime_alias_read_from_file (alias_list, file_name);
204 free (file_name);
205
206 file_name = malloc (strlen (directory) + strlen ("/mime/subclasses") + 1);
207 strcpy (file_name, directory); strcat (file_name, "/mime/subclasses");
208 _xdg_mime_parent_read_from_file (parent_list, file_name);
209 free (file_name);
210
211 file_name = malloc (strlen (directory) + strlen ("/mime/icons") + 1);
212 strcpy (file_name, directory); strcat (file_name, "/mime/icons");
213 _xdg_mime_icon_read_from_file (icon_list, file_name);
214 free (file_name);
215
216 file_name = malloc (strlen (directory) + strlen ("/mime/generic-icons") + 1);
217 strcpy (file_name, directory); strcat (file_name, "/mime/generic-icons");
218 _xdg_mime_icon_read_from_file (generic_icon_list, file_name);
219 free (file_name);
220
221 return FALSE; /* Keep processing */
222 }
223
224 /* Runs a command on all the directories in the search path */
225 static void
xdg_run_command_on_dirs(XdgDirectoryFunc func,void * user_data)226 xdg_run_command_on_dirs (XdgDirectoryFunc func,
227 void *user_data)
228 {
229 const char *xdg_data_home;
230 const char *xdg_data_dirs;
231 const char *ptr;
232
233 xdg_data_home = getenv ("XDG_DATA_HOME");
234 if (xdg_data_home)
235 {
236 if ((func) (xdg_data_home, user_data))
237 return;
238 }
239 else
240 {
241 const char *home;
242
243 home = getenv ("HOME");
244 if (home != NULL)
245 {
246 char *guessed_xdg_home;
247 int stop_processing;
248
249 guessed_xdg_home = malloc (strlen (home) + strlen ("/.local/share/") + 1);
250 strcpy (guessed_xdg_home, home);
251 strcat (guessed_xdg_home, "/.local/share/");
252 stop_processing = (func) (guessed_xdg_home, user_data);
253 free (guessed_xdg_home);
254
255 if (stop_processing)
256 return;
257 }
258 }
259
260 xdg_data_dirs = getenv ("XDG_DATA_DIRS");
261 if (xdg_data_dirs == NULL)
262 xdg_data_dirs = "/usr/local/share/:/usr/share/";
263
264 ptr = xdg_data_dirs;
265
266 while (*ptr != '\000')
267 {
268 const char *end_ptr;
269 char *dir;
270 int len;
271 int stop_processing;
272
273 end_ptr = ptr;
274 while (*end_ptr != ':' && *end_ptr != '\000')
275 end_ptr ++;
276
277 if (end_ptr == ptr)
278 {
279 ptr++;
280 continue;
281 }
282
283 if (*end_ptr == ':')
284 len = end_ptr - ptr;
285 else
286 len = end_ptr - ptr + 1;
287 dir = malloc (len + 1);
288 strncpy (dir, ptr, len);
289 dir[len] = '\0';
290 stop_processing = (func) (dir, user_data);
291 free (dir);
292
293 if (stop_processing)
294 return;
295
296 ptr = end_ptr;
297 }
298 }
299
300 /* Checks file_path to make sure it has the same mtime as last time it was
301 * checked. If it has a different mtime, or if the file doesn't exist, it
302 * returns FALSE.
303 *
304 * FIXME: This doesn't protect against permission changes.
305 */
306 static int
xdg_check_file(const char * file_path,int * exists)307 xdg_check_file (const char *file_path,
308 int *exists)
309 {
310 struct stat st;
311
312 /* If the file exists */
313 if (stat (file_path, &st) == 0)
314 {
315 XdgDirTimeList *list;
316
317 if (exists)
318 *exists = TRUE;
319
320 for (list = dir_time_list; list; list = list->next)
321 {
322 if (! strcmp (list->directory_name, file_path))
323 {
324 if (st.st_mtime == list->mtime)
325 list->checked = XDG_CHECKED_VALID;
326 else
327 list->checked = XDG_CHECKED_INVALID;
328
329 return (list->checked != XDG_CHECKED_VALID);
330 }
331 }
332 return TRUE;
333 }
334
335 if (exists)
336 *exists = FALSE;
337
338 return FALSE;
339 }
340
341 static int
xdg_check_dir(const char * directory,int * invalid_dir_list)342 xdg_check_dir (const char *directory,
343 int *invalid_dir_list)
344 {
345 int invalid, exists;
346 char *file_name;
347
348 assert (directory != NULL);
349
350 /* Check the mime.cache file */
351 file_name = malloc (strlen (directory) + strlen ("/mime/mime.cache") + 1);
352 strcpy (file_name, directory); strcat (file_name, "/mime/mime.cache");
353 invalid = xdg_check_file (file_name, &exists);
354 free (file_name);
355 if (invalid)
356 {
357 *invalid_dir_list = TRUE;
358 return TRUE;
359 }
360 else if (exists)
361 {
362 return FALSE;
363 }
364
365 /* Check the globs file */
366 file_name = malloc (strlen (directory) + strlen ("/mime/globs") + 1);
367 strcpy (file_name, directory); strcat (file_name, "/mime/globs");
368 invalid = xdg_check_file (file_name, NULL);
369 free (file_name);
370 if (invalid)
371 {
372 *invalid_dir_list = TRUE;
373 return TRUE;
374 }
375
376 /* Check the magic file */
377 file_name = malloc (strlen (directory) + strlen ("/mime/magic") + 1);
378 strcpy (file_name, directory); strcat (file_name, "/mime/magic");
379 invalid = xdg_check_file (file_name, NULL);
380 free (file_name);
381 if (invalid)
382 {
383 *invalid_dir_list = TRUE;
384 return TRUE;
385 }
386
387 return FALSE; /* Keep processing */
388 }
389
390 /* Walks through all the mime files stat()ing them to see if they've changed.
391 * Returns TRUE if they have. */
392 static int
xdg_check_dirs(void)393 xdg_check_dirs (void)
394 {
395 XdgDirTimeList *list;
396 int invalid_dir_list = FALSE;
397
398 for (list = dir_time_list; list; list = list->next)
399 list->checked = XDG_CHECKED_UNCHECKED;
400
401 xdg_run_command_on_dirs ((XdgDirectoryFunc) xdg_check_dir,
402 &invalid_dir_list);
403
404 if (invalid_dir_list)
405 return TRUE;
406
407 for (list = dir_time_list; list; list = list->next)
408 {
409 if (list->checked != XDG_CHECKED_VALID)
410 return TRUE;
411 }
412
413 return FALSE;
414 }
415
416 /* We want to avoid stat()ing on every single mime call, so we only look for
417 * newer files every 5 seconds. This will return TRUE if we need to reread the
418 * mime data from disk.
419 */
420 static int
xdg_check_time_and_dirs(void)421 xdg_check_time_and_dirs (void)
422 {
423 struct timeval tv;
424 time_t current_time;
425 int retval = FALSE;
426
427 gettimeofday (&tv, NULL);
428 current_time = tv.tv_sec;
429
430 if (current_time >= last_stat_time + 5)
431 {
432 retval = xdg_check_dirs ();
433 last_stat_time = current_time;
434 }
435
436 return retval;
437 }
438
439 /* Called in every public function. It reloads the hash function if need be.
440 */
441 static void
xdg_mime_init(void)442 xdg_mime_init (void)
443 {
444 if (xdg_check_time_and_dirs ())
445 {
446 xdg_mime_shutdown ();
447 }
448
449 if (need_reread)
450 {
451 global_hash = _xdg_glob_hash_new ();
452 global_magic = _xdg_mime_magic_new ();
453 alias_list = _xdg_mime_alias_list_new ();
454 parent_list = _xdg_mime_parent_list_new ();
455 icon_list = _xdg_mime_icon_list_new ();
456 generic_icon_list = _xdg_mime_icon_list_new ();
457
458 xdg_run_command_on_dirs ((XdgDirectoryFunc) xdg_mime_init_from_directory,
459 NULL);
460
461 need_reread = FALSE;
462 }
463 }
464
465 const char *
xdg_mime_get_mime_type_for_data(const void * data,size_t len,int * result_prio)466 xdg_mime_get_mime_type_for_data (const void *data,
467 size_t len,
468 int *result_prio)
469 {
470 const char *mime_type;
471
472 if (len == 0)
473 {
474 if (result_prio != NULL)
475 *result_prio = 100;
476 return XDG_MIME_TYPE_EMPTY;
477 }
478
479 xdg_mime_init ();
480
481 if (_caches)
482 mime_type = _xdg_mime_cache_get_mime_type_for_data (data, len, result_prio);
483 else
484 mime_type = _xdg_mime_magic_lookup_data (global_magic, data, len, result_prio, NULL, 0);
485
486 if (mime_type)
487 return mime_type;
488
489 return _xdg_binary_or_text_fallback(data, len);
490 }
491
492 const char *
xdg_mime_get_mime_type_for_file(const char * file_name,struct stat * statbuf)493 xdg_mime_get_mime_type_for_file (const char *file_name,
494 struct stat *statbuf)
495 {
496 const char *mime_type;
497 /* currently, only a few globs occur twice, and none
498 * more often, so 5 seems plenty.
499 */
500 const char *mime_types[5];
501 FILE *file;
502 unsigned char *data;
503 int max_extent;
504 int bytes_read;
505 struct stat buf;
506 const char *base_name;
507 int n;
508
509 if (file_name == NULL)
510 return NULL;
511 if (! _xdg_utf8_validate (file_name))
512 return NULL;
513
514 xdg_mime_init ();
515
516 if (_caches)
517 return _xdg_mime_cache_get_mime_type_for_file (file_name, statbuf);
518
519 base_name = _xdg_get_base_name (file_name);
520 n = _xdg_glob_hash_lookup_file_name (global_hash, base_name, mime_types, 5);
521
522 if (n == 1)
523 return mime_types[0];
524
525 if (!statbuf)
526 {
527 if (stat (file_name, &buf) != 0)
528 return XDG_MIME_TYPE_UNKNOWN;
529
530 statbuf = &buf;
531 }
532
533 if (!S_ISREG (statbuf->st_mode))
534 return XDG_MIME_TYPE_UNKNOWN;
535
536 /* FIXME: Need to make sure that max_extent isn't totally broken. This could
537 * be large and need getting from a stream instead of just reading it all
538 * in. */
539 max_extent = _xdg_mime_magic_get_buffer_extents (global_magic);
540 data = malloc (max_extent);
541 if (data == NULL)
542 return XDG_MIME_TYPE_UNKNOWN;
543
544 file = fopen (file_name, "r");
545 if (file == NULL)
546 {
547 free (data);
548 return XDG_MIME_TYPE_UNKNOWN;
549 }
550
551 bytes_read = fread (data, 1, max_extent, file);
552 if (ferror (file))
553 {
554 free (data);
555 fclose (file);
556 return XDG_MIME_TYPE_UNKNOWN;
557 }
558
559 mime_type = _xdg_mime_magic_lookup_data (global_magic, data, bytes_read, NULL,
560 mime_types, n);
561
562 if (!mime_type)
563 mime_type = _xdg_binary_or_text_fallback (data, bytes_read);
564
565 free (data);
566 fclose (file);
567
568 return mime_type;
569 }
570
571 const char *
xdg_mime_get_mime_type_from_file_name(const char * file_name)572 xdg_mime_get_mime_type_from_file_name (const char *file_name)
573 {
574 const char *mime_type;
575
576 xdg_mime_init ();
577
578 if (_caches)
579 return _xdg_mime_cache_get_mime_type_from_file_name (file_name);
580
581 if (_xdg_glob_hash_lookup_file_name (global_hash, file_name, &mime_type, 1))
582 return mime_type;
583 else
584 return XDG_MIME_TYPE_UNKNOWN;
585 }
586
587 int
xdg_mime_get_mime_types_from_file_name(const char * file_name,const char * mime_types[],int n_mime_types)588 xdg_mime_get_mime_types_from_file_name (const char *file_name,
589 const char *mime_types[],
590 int n_mime_types)
591 {
592 xdg_mime_init ();
593
594 if (_caches)
595 return _xdg_mime_cache_get_mime_types_from_file_name (file_name, mime_types, n_mime_types);
596
597 return _xdg_glob_hash_lookup_file_name (global_hash, file_name, mime_types, n_mime_types);
598 }
599
600 int
xdg_mime_is_valid_mime_type(const char * mime_type)601 xdg_mime_is_valid_mime_type (const char *mime_type)
602 {
603 /* FIXME: We should make this a better test
604 */
605 return _xdg_utf8_validate (mime_type);
606 }
607
608 void
xdg_mime_shutdown(void)609 xdg_mime_shutdown (void)
610 {
611 XdgCallbackList *list;
612
613 /* FIXME: Need to make this (and the whole library) thread safe */
614 if (dir_time_list)
615 {
616 xdg_dir_time_list_free (dir_time_list);
617 dir_time_list = NULL;
618 }
619
620 if (global_hash)
621 {
622 _xdg_glob_hash_free (global_hash);
623 global_hash = NULL;
624 }
625 if (global_magic)
626 {
627 _xdg_mime_magic_free (global_magic);
628 global_magic = NULL;
629 }
630
631 if (alias_list)
632 {
633 _xdg_mime_alias_list_free (alias_list);
634 alias_list = NULL;
635 }
636
637 if (parent_list)
638 {
639 _xdg_mime_parent_list_free (parent_list);
640 parent_list = NULL;
641 }
642
643 if (icon_list)
644 {
645 _xdg_mime_icon_list_free (icon_list);
646 icon_list = NULL;
647 }
648
649 if (generic_icon_list)
650 {
651 _xdg_mime_icon_list_free (generic_icon_list);
652 generic_icon_list = NULL;
653 }
654
655 if (_caches)
656 {
657 int i;
658
659 for (i = 0; i < n_caches; i++)
660 _xdg_mime_cache_unref (_caches[i]);
661 free (_caches);
662 _caches = NULL;
663 n_caches = 0;
664 }
665
666 for (list = callback_list; list; list = list->next)
667 (list->callback) (list->data);
668
669 need_reread = TRUE;
670 }
671
672 int
xdg_mime_get_max_buffer_extents(void)673 xdg_mime_get_max_buffer_extents (void)
674 {
675 xdg_mime_init ();
676
677 if (_caches)
678 return _xdg_mime_cache_get_max_buffer_extents ();
679
680 return _xdg_mime_magic_get_buffer_extents (global_magic);
681 }
682
683 const char *
_xdg_mime_unalias_mime_type(const char * mime_type)684 _xdg_mime_unalias_mime_type (const char *mime_type)
685 {
686 const char *lookup;
687
688 if (_caches)
689 return _xdg_mime_cache_unalias_mime_type (mime_type);
690
691 if ((lookup = _xdg_mime_alias_list_lookup (alias_list, mime_type)) != NULL)
692 return lookup;
693
694 return mime_type;
695 }
696
697 const char *
xdg_mime_unalias_mime_type(const char * mime_type)698 xdg_mime_unalias_mime_type (const char *mime_type)
699 {
700 xdg_mime_init ();
701
702 return _xdg_mime_unalias_mime_type (mime_type);
703 }
704
705 int
_xdg_mime_mime_type_equal(const char * mime_a,const char * mime_b)706 _xdg_mime_mime_type_equal (const char *mime_a,
707 const char *mime_b)
708 {
709 const char *unalias_a, *unalias_b;
710
711 unalias_a = _xdg_mime_unalias_mime_type (mime_a);
712 unalias_b = _xdg_mime_unalias_mime_type (mime_b);
713
714 if (strcmp (unalias_a, unalias_b) == 0)
715 return 1;
716
717 return 0;
718 }
719
720 int
xdg_mime_mime_type_equal(const char * mime_a,const char * mime_b)721 xdg_mime_mime_type_equal (const char *mime_a,
722 const char *mime_b)
723 {
724 xdg_mime_init ();
725
726 return _xdg_mime_mime_type_equal (mime_a, mime_b);
727 }
728
729 int
xdg_mime_media_type_equal(const char * mime_a,const char * mime_b)730 xdg_mime_media_type_equal (const char *mime_a,
731 const char *mime_b)
732 {
733 char *sep;
734
735 sep = strchr (mime_a, '/');
736
737 if (sep && strncmp (mime_a, mime_b, sep - mime_a + 1) == 0)
738 return 1;
739
740 return 0;
741 }
742
743 #if 1
744 static int
ends_with(const char * str,const char * suffix)745 ends_with (const char *str,
746 const char *suffix)
747 {
748 int length;
749 int suffix_length;
750
751 length = strlen (str);
752 suffix_length = strlen (suffix);
753 if (length < suffix_length)
754 return 0;
755
756 if (strcmp (str + length - suffix_length, suffix) == 0)
757 return 1;
758
759 return 0;
760 }
761
762 static int
xdg_mime_is_super_type(const char * mime)763 xdg_mime_is_super_type (const char *mime)
764 {
765 return ends_with (mime, "/*");
766 }
767 #endif
768
769 int
_xdg_mime_mime_type_subclass(const char * mime,const char * base)770 _xdg_mime_mime_type_subclass (const char *mime,
771 const char *base)
772 {
773 const char *umime, *ubase;
774 const char **parents;
775
776 if (_caches)
777 return _xdg_mime_cache_mime_type_subclass (mime, base);
778
779 umime = _xdg_mime_unalias_mime_type (mime);
780 ubase = _xdg_mime_unalias_mime_type (base);
781
782 if (strcmp (umime, ubase) == 0)
783 return 1;
784
785 #if 1
786 /* Handle supertypes */
787 if (xdg_mime_is_super_type (ubase) &&
788 xdg_mime_media_type_equal (umime, ubase))
789 return 1;
790 #endif
791
792 /* Handle special cases text/plain and application/octet-stream */
793 if (strcmp (ubase, "text/plain") == 0 &&
794 strncmp (umime, "text/", 5) == 0)
795 return 1;
796
797 if (strcmp (ubase, "application/octet-stream") == 0 &&
798 strncmp (umime, "inode/", 6) != 0)
799 return 1;
800
801 parents = _xdg_mime_parent_list_lookup (parent_list, umime);
802 for (; parents && *parents; parents++)
803 {
804 if (_xdg_mime_mime_type_subclass (*parents, ubase))
805 return 1;
806 }
807
808 return 0;
809 }
810
811 int
xdg_mime_mime_type_subclass(const char * mime,const char * base)812 xdg_mime_mime_type_subclass (const char *mime,
813 const char *base)
814 {
815 xdg_mime_init ();
816
817 return _xdg_mime_mime_type_subclass (mime, base);
818 }
819
820 char **
xdg_mime_list_mime_parents(const char * mime)821 xdg_mime_list_mime_parents (const char *mime)
822 {
823 const char **parents;
824 char **result;
825 int i, n;
826
827 if (_caches)
828 return _xdg_mime_cache_list_mime_parents (mime);
829
830 parents = xdg_mime_get_mime_parents (mime);
831
832 if (!parents)
833 return NULL;
834
835 for (i = 0; parents[i]; i++) ;
836
837 n = (i + 1) * sizeof (char *);
838 result = (char **) malloc (n);
839 memcpy (result, parents, n);
840
841 return result;
842 }
843
844 const char **
xdg_mime_get_mime_parents(const char * mime)845 xdg_mime_get_mime_parents (const char *mime)
846 {
847 const char *umime;
848
849 xdg_mime_init ();
850
851 umime = _xdg_mime_unalias_mime_type (mime);
852
853 return _xdg_mime_parent_list_lookup (parent_list, umime);
854 }
855
856 void
xdg_mime_dump(void)857 xdg_mime_dump (void)
858 {
859 xdg_mime_init();
860
861 printf ("*** ALIASES ***\n\n");
862 _xdg_mime_alias_list_dump (alias_list);
863 printf ("\n*** PARENTS ***\n\n");
864 _xdg_mime_parent_list_dump (parent_list);
865 printf ("\n*** CACHE ***\n\n");
866 _xdg_glob_hash_dump (global_hash);
867 printf ("\n*** GLOBS ***\n\n");
868 _xdg_glob_hash_dump (global_hash);
869 printf ("\n*** GLOBS REVERSE TREE ***\n\n");
870 _xdg_mime_cache_glob_dump ();
871 }
872
873
874 /* Registers a function to be called every time the mime database reloads its files
875 */
876 int
xdg_mime_register_reload_callback(XdgMimeCallback callback,void * data,XdgMimeDestroy destroy)877 xdg_mime_register_reload_callback (XdgMimeCallback callback,
878 void *data,
879 XdgMimeDestroy destroy)
880 {
881 XdgCallbackList *list_el;
882 static int callback_id = 1;
883
884 /* Make a new list element */
885 list_el = calloc (1, sizeof (XdgCallbackList));
886 list_el->callback_id = callback_id;
887 list_el->callback = callback;
888 list_el->data = data;
889 list_el->destroy = destroy;
890 list_el->next = callback_list;
891 if (list_el->next)
892 list_el->next->prev = list_el;
893
894 callback_list = list_el;
895 callback_id ++;
896
897 return callback_id - 1;
898 }
899
900 void
xdg_mime_remove_callback(int callback_id)901 xdg_mime_remove_callback (int callback_id)
902 {
903 XdgCallbackList *list;
904
905 for (list = callback_list; list; list = list->next)
906 {
907 if (list->callback_id == callback_id)
908 {
909 if (list->next)
910 list->next = list->prev;
911
912 if (list->prev)
913 list->prev->next = list->next;
914 else
915 callback_list = list->next;
916
917 /* invoke the destroy handler */
918 (list->destroy) (list->data);
919 free (list);
920 return;
921 }
922 }
923 }
924
925 const char *
xdg_mime_get_icon(const char * mime)926 xdg_mime_get_icon (const char *mime)
927 {
928 xdg_mime_init ();
929
930 if (_caches)
931 return _xdg_mime_cache_get_icon (mime);
932
933 return _xdg_mime_icon_list_lookup (icon_list, mime);
934 }
935
936 const char *
xdg_mime_get_generic_icon(const char * mime)937 xdg_mime_get_generic_icon (const char *mime)
938 {
939 xdg_mime_init ();
940
941 if (_caches)
942 return _xdg_mime_cache_get_generic_icon (mime);
943
944 return _xdg_mime_icon_list_lookup (generic_icon_list, mime);
945 }
946