2 * $RCSId: xc/lib/fontconfig/src/fccache.c,v 1.12 2002/08/22 07:36:44 keithp Exp $
4 * Copyright © 2000 Keith Packard
5 * Copyright © 2005 Patrick Lam
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that
10 * copyright notice and this permission notice appear in supporting
11 * documentation, and that the name of Keith Packard not be used in
12 * advertising or publicity pertaining to distribution of the software without
13 * specific, written prior permission. Keith Packard makes no
14 * representations about the suitability of this software for any purpose. It
15 * is provided "as is" without express or implied warranty.
17 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
23 * PERFORMANCE OF THIS SOFTWARE.
30 #include <sys/utsname.h>
31 #include <sys/types.h>
36 #define ENDIAN_TEST 0x12345678
37 #define MACHINE_SIGNATURE_SIZE 9 + 5*20 + 1
40 FcDirCacheOpen (const FcChar8 * dir);
43 FcDirCacheHashName (char * cache_file, int collisions);
46 FcCacheSkipToArch (int fd, const char * arch);
49 FcCacheCopyOld (int fd, int fd_orig, off_t start);
52 FcDirCacheProduce (FcFontSet *set, FcCache * metadata);
55 FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config);
58 FcCacheNextOffset(off_t w);
61 FcCacheMachineSignature (void);
64 FcCacheHaveBank (int bank);
67 FcCacheAddBankDir (int bank, const char * dir);
75 static void MD5Init(struct MD5Context *ctx);
76 static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len);
77 static void MD5Final(unsigned char digest[16], struct MD5Context *ctx);
78 static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]);
80 #define FC_DBG_CACHE_REF 1024
83 FcCacheReadString (int fd, char *dest, int len)
96 while (read (fd, &c, 1) == 1)
123 FcCacheSkipString (int fd)
129 while (read (fd, &c, 1) == 1)
150 FcCacheWriteString (int fd, const char *chars)
152 if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1)
158 FcGlobalCacheDirDestroy (FcGlobalCacheDir *d)
160 FcMemFree (FC_MEM_STRING, strlen (d->name)+1);
162 FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir));
167 FcGlobalCacheCreate (void)
169 FcGlobalCache *cache;
171 cache = malloc (sizeof (FcGlobalCache));
174 FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache));
176 cache->updated = FcFalse;
182 FcGlobalCacheDestroy (FcGlobalCache *cache)
184 FcGlobalCacheDir *d, *next;
186 for (d = cache->dirs; d; d = next)
189 FcGlobalCacheDirDestroy (d);
191 FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache));
196 FcGlobalCacheLoad (FcGlobalCache *cache,
198 const FcChar8 *cache_file,
201 char name_buf[FC_MAX_FILE_LEN];
202 FcGlobalCacheDir *d, *next;
203 FcFileTime config_time = FcConfigModifiedTime (config);
204 char * current_arch_machine_name;
205 char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
206 off_t current_arch_start;
208 struct stat cache_stat, dir_stat;
210 if (stat ((char *) cache_file, &cache_stat) < 0)
213 cache->fd = open ((char *) cache_file, O_RDONLY);
217 cache->updated = FcFalse;
219 FcCacheReadString (cache->fd, name_buf, sizeof (name_buf));
220 if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) != 0)
223 current_arch_machine_name = FcCacheMachineSignature ();
224 current_arch_start = FcCacheSkipToArch(cache->fd,
225 current_arch_machine_name);
226 if (current_arch_start < 0)
227 goto bail_and_destroy;
229 lseek (cache->fd, current_arch_start, SEEK_SET);
230 FcCacheReadString (cache->fd, candidate_arch_machine_name,
231 sizeof (candidate_arch_machine_name));
232 if (strlen(candidate_arch_machine_name) == 0)
233 goto bail_and_destroy;
239 FcCacheReadString (cache->fd, name_buf, sizeof (name_buf));
240 if (!strlen(name_buf))
243 /* Directory must be older than the global cache file; also
244 cache must be newer than the config file. */
245 if (stat ((char *) name_buf, &dir_stat) < 0 ||
246 dir_stat.st_mtime > cache_stat.st_mtime ||
247 (config_time.set && cache_stat.st_mtime < config_time.time))
251 FcStrSetAdd (staleDirs, FcStrCopy ((FcChar8 *)name_buf));
252 read (cache->fd, &md, sizeof (FcCache));
253 lseek (cache->fd, FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count, SEEK_SET);
257 d = malloc (sizeof (FcGlobalCacheDir));
261 d->next = cache->dirs;
264 d->name = (char *)FcStrCopy ((FcChar8 *)name_buf);
266 d->offset = lseek (cache->fd, 0, SEEK_CUR);
267 if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache))
269 targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count;
270 if (lseek (cache->fd, targ, SEEK_SET) != targ)
276 for (d = cache->dirs; d; d = next)
291 if (stat ((char *) cache_file, &cache_stat) == 0)
292 unlink ((char *)cache_file);
299 FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config)
302 FcBool ret = FcFalse;
307 if (!(dir = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)dir)))
308 return FcFalse; /* non-existing directory */
310 for (d = cache->dirs; d; d = d->next)
312 if (strncmp (d->name, dir, strlen(dir)) == 0)
314 lseek (cache->fd, d->offset, SEEK_SET);
315 if (!FcDirCacheConsume (cache->fd, dir, set, config))
317 if (strcmp (d->name, dir) == 0)
326 FcGlobalCacheUpdate (FcGlobalCache *cache,
331 FcGlobalCacheDir * d;
333 name = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)name);
334 for (d = cache->dirs; d; d = d->next)
336 if (strcmp(d->name, name) == 0)
342 d = malloc (sizeof (FcGlobalCacheDir));
345 d->next = cache->dirs;
349 cache->updated = FcTrue;
351 d->name = (char *)FcStrCopy ((FcChar8 *)name);
352 d->ent = FcDirCacheProduce (set, &d->metadata);
358 FcGlobalCacheSave (FcGlobalCache *cache,
359 const FcChar8 *cache_file,
363 FcGlobalCacheDir *dir;
365 off_t current_arch_start = 0, truncate_to;
366 char * current_arch_machine_name, * header;
371 #if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
372 /* Set-UID programs can't safely update the cache */
373 if (getuid () != geteuid ())
377 atomic = FcAtomicCreate (cache_file);
381 if (!FcAtomicLock (atomic))
383 fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT,
387 FcCacheWriteString (fd, FC_GLOBAL_MAGIC_COOKIE);
389 fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY);
391 current_arch_machine_name = FcCacheMachineSignature ();
393 current_arch_start = 0;
395 current_arch_start = FcCacheSkipToArch (fd_orig,
396 current_arch_machine_name);
398 if (current_arch_start < 0)
400 off_t i = lseek(fd_orig, 0, SEEK_END);
401 if (i < strlen (FC_GLOBAL_MAGIC_COOKIE)+1)
402 i = strlen (FC_GLOBAL_MAGIC_COOKIE)+1;
403 current_arch_start = FcCacheNextOffset (i);
406 if (!FcCacheCopyOld(fd, fd_orig, current_arch_start))
412 current_arch_start = lseek(fd, 0, SEEK_CUR);
413 if (ftruncate (fd, current_arch_start) == -1)
416 header = malloc (10 + strlen (current_arch_machine_name));
420 truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11;
421 for (dir = cache->dirs; dir; dir = dir->next)
423 truncate_to += strlen(dir->name) + 1;
424 truncate_to += sizeof (FcCache);
425 truncate_to = FcCacheNextOffset (truncate_to);
426 truncate_to += dir->metadata.count;
428 truncate_to -= current_arch_start;
430 sprintf (header, "%8x ", (int)truncate_to);
431 strcat (header, current_arch_machine_name);
432 if (!FcCacheWriteString (fd, header))
435 for (dir = cache->dirs; dir; dir = dir->next)
439 const char * d = (const char *)FcConfigNormalizeFontDir (config, (const FcChar8 *)dir->name);
441 FcCacheWriteString (fd, d);
442 write (fd, &dir->metadata, sizeof(FcCache));
443 lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)), SEEK_SET);
444 write (fd, dir->ent, dir->metadata.count);
448 FcCacheWriteString (fd, "");
450 if (close (fd) == -1)
453 if (!FcAtomicReplaceOrig (atomic))
456 FcAtomicUnlock (atomic);
457 FcAtomicDestroy (atomic);
459 cache->updated = FcFalse;
470 FcAtomicDeleteNew (atomic);
472 FcAtomicUnlock (atomic);
474 FcAtomicDestroy (atomic);
479 * Find the next presumably-mmapable offset after the supplied file
483 FcCacheNextOffset(off_t w)
485 static long pagesize = -1;
487 pagesize = sysconf(_SC_PAGESIZE);
488 if (w % pagesize == 0)
491 return ((w / pagesize)+1)*pagesize;
494 /* return the address of the segment for the provided arch,
495 * or -1 if arch not found */
497 FcCacheSkipToArch (int fd, const char * arch)
499 char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9];
500 char * candidate_arch;
501 off_t current_arch_start = 0;
503 lseek (fd, 0, SEEK_SET);
504 FcCacheSkipString (fd);
505 current_arch_start = lseek (fd, 0, SEEK_CUR);
507 /* skip arches that are not the current arch */
512 if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start)
515 if (FcCacheReadString (fd, candidate_arch_machine_name_count,
516 sizeof (candidate_arch_machine_name_count)) == 0)
518 if (!strlen(candidate_arch_machine_name_count))
520 bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16);
522 // count = 0 should probably be distinguished from the !bs condition
523 if (!bs || bs < strlen (candidate_arch_machine_name_count))
526 candidate_arch++; /* skip leading space */
528 if (strcmp (candidate_arch, arch)==0)
529 return current_arch_start;
530 current_arch_start += bs;
536 /* Cuts out the segment at the file pointer (moves everything else
537 * down to cover it), and leaves the file pointer at the end of the
540 FcCacheCopyOld (int fd, int fd_orig, off_t start)
542 char * buf = malloc (8192);
543 char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9];
545 int c, bytes_skipped;
552 lseek (fd, 0, SEEK_SET); lseek (fd_orig, 0, SEEK_SET);
559 if ((c = read (fd_orig, buf, b)) <= 0)
561 if (write (fd, buf, c) < 0)
568 lseek (fd, start, SEEK_SET);
569 if (FcCacheReadString (fd, candidate_arch_machine_name,
570 sizeof (candidate_arch_machine_name)) == 0)
572 if (!strlen(candidate_arch_machine_name))
575 bs = strtol(candidate_arch_machine_name, 0, 16);
582 lseek (fd, start+bs+bytes_skipped, SEEK_SET);
583 if ((c = read (fd, buf, 8192)) <= 0)
585 lseek (fd, start+bytes_skipped, SEEK_SET);
586 if (write (fd, buf, c) < 0)
591 lseek (fd, start+bytes_skipped, SEEK_SET);
602 /* Does not check that the cache has the appropriate arch section. */
603 /* Also, this can be fooled if the original location has a stale
604 * cache, and the hashed location has an up-to-date cache. Oh well,
605 * sucks to be you in that case! */
607 FcDirCacheValid (const FcChar8 *dir)
609 struct stat file_stat, dir_stat;
612 if (stat ((char *) dir, &dir_stat) < 0)
615 fd = FcDirCacheOpen (dir);
619 if (fstat (fd, &file_stat) < 0)
625 * If the directory has been modified more recently than
626 * the cache file, the cache is not valid
628 if (dir_stat.st_mtime > file_stat.st_mtime)
638 /* Assumes that the cache file in 'dir' exists.
639 * Checks that the cache has the appropriate arch section. */
641 FcDirCacheHasCurrentArch (const FcChar8 *dir)
644 off_t current_arch_start;
645 char *current_arch_machine_name;
647 fd = FcDirCacheOpen (dir);
651 current_arch_machine_name = FcCacheMachineSignature();
652 current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
655 if (current_arch_start < 0)
665 FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config)
668 char *cache_hashed = 0;
670 struct stat cache_stat;
671 char name_buf[FC_MAX_FILE_LEN];
673 dir = FcConfigNormalizeFontDir (config, dir);
674 cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
678 /* First remove normal cache file. */
679 if (stat ((char *) cache_file, &cache_stat) == 0 &&
680 unlink ((char *)cache_file) != 0)
683 /* Next remove any applicable hashed files. */
684 fd = -1; collisions = 0;
688 FcStrFree ((FcChar8 *)cache_hashed);
690 cache_hashed = FcDirCacheHashName (cache_file, collisions++);
696 fd = open(cache_hashed, O_RDONLY);
699 FcStrFree ((FcChar8 *)cache_file);
703 FcCacheReadString (fd, name_buf, sizeof (name_buf));
704 if (!strlen(name_buf))
706 FcStrFree ((FcChar8 *)cache_hashed);
709 } while (strcmp (name_buf, cache_file) != 0);
711 FcStrFree ((FcChar8 *)cache_file);
714 if (stat ((char *) cache_hashed, &cache_stat) == 0 &&
715 unlink ((char *)cache_hashed) != 0)
717 FcStrFree ((FcChar8 *)cache_hashed);
721 FcStrFree ((FcChar8 *)cache_hashed);
725 FcStrFree ((FcChar8 *)cache_file);
730 FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache,
731 FcStrList *list, FcFontSet * set)
735 FcChar8 *file, *base;
741 * Read in the results from 'list'.
743 while ((dir = FcStrListNext (list)))
745 if (!FcConfigAcceptFilename (config, dir))
749 file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1);
753 strcpy ((char *) file, (char *) dir);
754 strcat ((char *) file, "/");
755 base = file + strlen ((char *) file);
757 subdirs = FcStrSetCreate ();
760 fprintf (stderr, "Can't create directory set\n");
766 if (access ((char *) dir, X_OK) < 0)
774 fprintf (stderr, "\"%s\": ", dir);
778 FcStrSetDestroy (subdirs);
782 if (stat ((char *) dir, &statb) == -1)
784 fprintf (stderr, "\"%s\": ", dir);
786 FcStrSetDestroy (subdirs);
791 if (!S_ISDIR (statb.st_mode))
793 fprintf (stderr, "\"%s\": not a directory, skipping\n", dir);
794 FcStrSetDestroy (subdirs);
798 if (!FcDirCacheValid (dir) || !FcDirCacheRead (set, subdirs, dir, config))
800 if (FcDebug () & FC_DBG_FONTSET)
801 printf ("cache scan dir %s\n", dir);
803 FcDirScanConfig (set, subdirs, cache,
804 config->blanks, dir, FcFalse, config);
806 sublist = FcStrListCreate (subdirs);
807 FcStrSetDestroy (subdirs);
810 fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir);
815 ret += FcCacheReadDirs (config, cache, sublist, set);
818 FcStrListDone (list);
823 FcCacheRead (FcConfig *config, FcGlobalCache * cache)
825 FcFontSet * s = FcFontSetCreate();
829 if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s))
835 FcFontSetDestroy (s);
839 static const char bin2hex[] = { '0', '1', '2', '3',
842 'c', 'd', 'e', 'f' };
845 FcDirCacheHashName (char * cache_file, int collisions)
847 unsigned char hash[16], hex_hash[33];
849 unsigned char uscore = '_';
852 struct MD5Context ctx;
855 MD5Update (&ctx, (unsigned char *)cache_file, strlen (cache_file));
857 for (i = 0; i < collisions; i++)
858 MD5Update (&ctx, &uscore, 1);
860 MD5Final (hash, &ctx);
862 for (cnt = 0; cnt < 16; ++cnt)
864 hex_hash[2*cnt] = bin2hex[hash[cnt] >> 4];
865 hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf];
869 tmp = FcStrPlus ((FcChar8 *)hex_hash, (FcChar8 *)FC_CACHE_SUFFIX);
873 cache_hashed = (char *)FcStrPlus ((FcChar8 *)PKGCACHEDIR"/", tmp);
879 /* Opens the hashed name for cache_file.
880 * This would fail in the unlikely event of a collision and subsequent
881 * removal of the file which originally caused the collision. */
883 FcDirCacheOpen (const FcChar8 *dir)
886 int fd = -1, collisions = 0;
887 char *cache_file, *cache_hashed;
888 char name_buf[FC_MAX_FILE_LEN];
889 struct stat dir_stat;
891 cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
895 fd = open(cache_file, O_RDONLY);
899 if (stat ((char *)dir, &dir_stat) == -1)
906 FcChar8 * name_buf_dir;
908 cache_hashed = FcDirCacheHashName (cache_file, collisions++);
911 FcStrFree ((FcChar8 *)cache_file);
917 fd = open(cache_hashed, O_RDONLY);
918 FcStrFree ((FcChar8 *)cache_hashed);
922 FcStrFree ((FcChar8 *)cache_file);
925 FcCacheReadString (fd, name_buf, sizeof (name_buf));
926 if (!strlen(name_buf))
929 name_buf_dir = FcStrDirname ((FcChar8 *)name_buf);
930 if (stat ((char *)name_buf_dir, &c) == -1)
932 FcStrFree (name_buf_dir);
935 FcStrFree (name_buf_dir);
936 found = (c.st_ino == dir_stat.st_ino) && (c.st_dev == dir_stat.st_dev);
938 FcStrFree ((FcChar8 *)cache_file);
942 FcStrFree ((FcChar8 *)cache_file);
947 /* read serialized state from the cache file */
949 FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir, FcConfig *config)
952 char *current_arch_machine_name;
953 char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
954 off_t current_arch_start = 0;
955 char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
957 fd = FcDirCacheOpen (dir);
961 current_arch_machine_name = FcCacheMachineSignature();
962 current_arch_start = FcCacheSkipToArch(fd,
963 current_arch_machine_name);
964 if (current_arch_start < 0)
967 lseek (fd, current_arch_start, SEEK_SET);
968 if (FcCacheReadString (fd, candidate_arch_machine_name,
969 sizeof (candidate_arch_machine_name)) == 0)
972 while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0)
973 FcStrSetAdd (dirs, (FcChar8 *)subdirName);
975 if (!FcDirCacheConsume (fd, (const char *)dir, set, config))
988 FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config)
991 void * current_dir_block;
994 read(fd, &metadata, sizeof(FcCache));
995 if (metadata.magic != FC_CACHE_MAGIC)
1000 pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR));
1001 lseek (fd, pos, SEEK_SET);
1003 FcConfigAddFontDir (config, (FcChar8 *)dir);
1007 pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR));
1008 current_dir_block = mmap (0, metadata.count,
1009 PROT_READ, MAP_SHARED, fd, pos);
1010 lseek (fd, pos+metadata.count, SEEK_SET);
1011 if (current_dir_block == MAP_FAILED)
1014 FcCacheAddBankDir (metadata.bank, dir);
1016 FcConfigAddFontDir (config, (FcChar8 *)dir);
1018 if (!FcFontSetUnserialize (&metadata, set, current_dir_block))
1025 FcDirCacheProduce (FcFontSet *set, FcCache *metadata)
1027 void * current_dir_block, * final_dir_block;
1028 static unsigned int rand_state = 0;
1029 int bank, needed_bytes_no_align;
1032 rand_state = time(0L);
1033 bank = rand_r(&rand_state);
1035 while (FcCacheHaveBank(bank))
1036 bank = rand_r(&rand_state);
1038 memset (metadata, 0, sizeof(FcCache));
1040 needed_bytes_no_align = FcFontSetNeededBytes (set);
1041 metadata->count = needed_bytes_no_align +
1042 FcFontSetNeededBytesAlign ();
1043 metadata->magic = FC_CACHE_MAGIC;
1044 metadata->bank = bank;
1046 if (!needed_bytes_no_align) /* not a failure, no fonts to write */
1048 /* no, you don't really need to write any bytes at all. */
1049 metadata->count = 0;
1053 current_dir_block = malloc (metadata->count);
1054 if (!current_dir_block)
1057 memset (current_dir_block, 0, metadata->count);
1058 final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block);
1060 if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block)
1063 if (!FcFontSetSerialize (bank, set))
1066 return current_dir_block;
1069 free (current_dir_block);
1073 /* write serialized state to the cache file */
1075 FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir)
1079 int fd, fd_orig, i, dirs_count;
1082 off_t current_arch_start = 0, truncate_to;
1083 char name_buf[FC_MAX_FILE_LEN];
1086 char *current_arch_machine_name, * header;
1087 void *current_dir_block = 0;
1089 dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir);
1093 cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);
1097 /* Ensure that we're not trampling a cache for some other dir. */
1098 /* This is slightly different from FcDirCacheOpen, since it
1099 * needs the filename, not the file descriptor. */
1100 fd = -1; collisions = 0;
1103 cache_hashed = FcDirCacheHashName (cache_file, collisions++);
1109 fd = open(cache_hashed, O_RDONLY);
1112 FcCacheReadString (fd, name_buf, sizeof (name_buf));
1115 if (!strlen(name_buf))
1118 if (strcmp (name_buf, cache_file) != 0)
1122 current_dir_block = FcDirCacheProduce (set, &metadata);
1124 if (metadata.count && !current_dir_block)
1127 if (FcDebug () & FC_DBG_CACHE)
1128 printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file);
1130 atomic = FcAtomicCreate ((FcChar8 *)cache_hashed);
1134 if (!FcAtomicLock (atomic))
1136 /* Now try rewriting the original version of the file. */
1137 FcAtomicDestroy (atomic);
1139 atomic = FcAtomicCreate ((FcChar8 *)cache_file);
1140 fd_orig = open (cache_file, O_RDONLY);
1142 fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY);
1144 fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666);
1149 /* In all cases, try opening the real location of the cache file first. */
1150 /* (even if that's not atomic.) */
1151 fd_orig = open (cache_file, O_RDONLY);
1153 fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY);
1155 fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT, 0666);
1159 FcCacheWriteString (fd, cache_file);
1161 current_arch_machine_name = FcCacheMachineSignature ();
1162 current_arch_start = 0;
1165 current_arch_start =
1166 FcCacheSkipToArch(fd_orig, current_arch_machine_name);
1168 if (current_arch_start < 0)
1170 off_t i = lseek(fd_orig, 0, SEEK_END);
1171 if (i < strlen (FC_GLOBAL_MAGIC_COOKIE)+1)
1172 i = strlen (FC_GLOBAL_MAGIC_COOKIE)+1;
1173 current_arch_start = FcCacheNextOffset (i);
1176 if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start))
1182 current_arch_start = lseek(fd, 0, SEEK_CUR);
1183 if (ftruncate (fd, current_arch_start) == -1)
1186 /* allocate space for subdir names in this block */
1188 for (i = 0; i < dirs->size; i++)
1189 dirs_count += strlen((char *)dirs->strs[i]) + 1;
1192 /* now write the address of the next offset */
1193 truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start;
1194 header = malloc (10 + strlen (current_arch_machine_name));
1197 sprintf (header, "%8x ", (int)truncate_to);
1198 strcat (header, current_arch_machine_name);
1199 if (!FcCacheWriteString (fd, header))
1202 for (i = 0; i < dirs->size; i++)
1203 FcCacheWriteString (fd, (char *)dirs->strs[i]);
1204 FcCacheWriteString (fd, "");
1206 write (fd, &metadata, sizeof(FcCache));
1209 lseek (fd, FcCacheNextOffset (lseek(fd, 0, SEEK_END)), SEEK_SET);
1210 write (fd, current_dir_block, metadata.count);
1211 free (current_dir_block);
1214 /* this actually serves to pad out the cache file, if needed */
1215 if (ftruncate (fd, current_arch_start + truncate_to) == -1)
1220 if (!FcAtomicReplaceOrig(atomic))
1222 FcStrFree ((FcChar8 *)cache_hashed);
1223 FcStrFree ((FcChar8 *)cache_file);
1224 FcAtomicUnlock (atomic);
1225 FcAtomicDestroy (atomic);
1233 FcAtomicUnlock (atomic);
1235 FcAtomicDestroy (atomic);
1237 FcStrFree ((FcChar8 *)cache_hashed);
1239 unlink ((char *)cache_file);
1240 FcStrFree ((FcChar8 *)cache_file);
1241 if (current_dir_block)
1242 free (current_dir_block);
1248 FcCacheMachineSignature ()
1250 static char buf[MACHINE_SIGNATURE_SIZE];
1251 int32_t magic = ENDIAN_TEST;
1252 char * m = (char *)&magic;
1254 sprintf (buf, "%2x%2x%2x%2x "
1255 "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
1256 "%4x %4x %4x %4x %4x %4x %4x %4x\n",
1257 m[0], m[1], m[2], m[3],
1258 (unsigned int)sizeof (char),
1259 (unsigned int)sizeof (char *),
1260 (unsigned int)sizeof (int),
1261 (unsigned int)sizeof (FcPattern),
1262 (unsigned int)sizeof (FcPatternEltPtr),
1263 (unsigned int)sizeof (struct _FcPatternElt *),
1264 (unsigned int)sizeof (FcPatternElt),
1265 (unsigned int)sizeof (FcObjectPtr),
1266 (unsigned int)sizeof (FcValueListPtr),
1267 (unsigned int)sizeof (FcValue),
1268 (unsigned int)sizeof (FcValueBinding),
1269 (unsigned int)sizeof (struct _FcValueList *),
1270 (unsigned int)sizeof (FcCharSet),
1271 (unsigned int)sizeof (FcCharLeaf **),
1272 (unsigned int)sizeof (FcChar16 *),
1273 (unsigned int)sizeof (FcChar16),
1274 (unsigned int)sizeof (FcCharLeaf),
1275 (unsigned int)sizeof (FcChar32),
1276 (unsigned int)sizeof (FcCache),
1277 (unsigned int)sysconf(_SC_PAGESIZE));
1282 static int banks_ptr = 0, banks_alloc = 0;
1283 int * _fcBankId = 0, * _fcBankIdx = 0;
1284 static const char ** bankDirs = 0;
1287 FcCacheHaveBank (int bank)
1291 if (bank < FC_BANK_FIRST)
1294 for (i = 0; i < banks_ptr; i++)
1295 if (_fcBankId[i] == bank)
1302 FcCacheBankToIndexMTF (int bank)
1306 for (i = 0; i < banks_ptr; i++)
1307 if (_fcBankId[_fcBankIdx[i]] == bank)
1309 int t = _fcBankIdx[i];
1311 for (j = i; j > 0; j--)
1312 _fcBankIdx[j] = _fcBankIdx[j-1];
1317 if (banks_ptr >= banks_alloc)
1322 b = realloc (_fcBankId, (banks_alloc + 4) * sizeof(int));
1327 bidx = realloc (_fcBankIdx, (banks_alloc + 4) * sizeof(int));
1332 bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *));
1341 _fcBankId[i] = bank;
1347 FcCacheAddBankDir (int bank, const char * dir)
1349 int bi = FcCacheBankToIndexMTF (bank);
1354 bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir);
1358 FcCacheFindBankDir (int bank)
1360 int bi = FcCacheBankToIndex (bank);
1361 return bankDirs[bi];
1365 * This code implements the MD5 message-digest algorithm.
1366 * The algorithm is due to Ron Rivest. This code was
1367 * written by Colin Plumb in 1993, no copyright is claimed.
1368 * This code is in the public domain; do with it what you wish.
1370 * Equivalent code is available from RSA Data Security, Inc.
1371 * This code has been tested against that, and is equivalent,
1372 * except that you don't need to include two pages of legalese
1375 * To compute the message digest of a chunk of bytes, declare an
1376 * MD5Context structure, pass it to MD5Init, call MD5Update as
1377 * needed on buffers full of bytes, and then call MD5Final, which
1378 * will fill a supplied 16-byte array with the digest.
1382 #define byteReverse(buf, len) /* Nothing */
1385 * Note: this code is harmless on little-endian machines.
1387 void byteReverse(unsigned char *buf, unsigned longs)
1391 t = (FcChar32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
1392 ((unsigned) buf[1] << 8 | buf[0]);
1393 *(FcChar32 *) buf = t;
1400 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
1401 * initialization constants.
1403 static void MD5Init(struct MD5Context *ctx)
1405 ctx->buf[0] = 0x67452301;
1406 ctx->buf[1] = 0xefcdab89;
1407 ctx->buf[2] = 0x98badcfe;
1408 ctx->buf[3] = 0x10325476;
1415 * Update context to reflect the concatenation of another buffer full
1418 static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len)
1422 /* Update bitcount */
1425 if ((ctx->bits[0] = t + ((FcChar32) len << 3)) < t)
1426 ctx->bits[1]++; /* Carry from low to high */
1427 ctx->bits[1] += len >> 29;
1429 t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
1431 /* Handle any leading odd-sized chunks */
1434 unsigned char *p = (unsigned char *) ctx->in + t;
1438 memcpy(p, buf, len);
1442 byteReverse(ctx->in, 16);
1443 MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
1447 /* Process data in 64-byte chunks */
1450 memcpy(ctx->in, buf, 64);
1451 byteReverse(ctx->in, 16);
1452 MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
1457 /* Handle any remaining bytes of data. */
1459 memcpy(ctx->in, buf, len);
1463 * Final wrapup - pad to 64-byte boundary with the bit pattern
1464 * 1 0* (64-bit count of bits processed, MSB-first)
1466 static void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
1471 /* Compute number of bytes mod 64 */
1472 count = (ctx->bits[0] >> 3) & 0x3F;
1474 /* Set the first char of padding to 0x80. This is safe since there is
1475 always at least one byte free */
1476 p = ctx->in + count;
1479 /* Bytes of padding needed to make 64 bytes */
1480 count = 64 - 1 - count;
1482 /* Pad out to 56 mod 64 */
1484 /* Two lots of padding: Pad the first block to 64 bytes */
1485 memset(p, 0, count);
1486 byteReverse(ctx->in, 16);
1487 MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
1489 /* Now fill the next block with 56 bytes */
1490 memset(ctx->in, 0, 56);
1492 /* Pad block to 56 bytes */
1493 memset(p, 0, count - 8);
1495 byteReverse(ctx->in, 14);
1497 /* Append length in bits and transform */
1498 ((FcChar32 *) ctx->in)[14] = ctx->bits[0];
1499 ((FcChar32 *) ctx->in)[15] = ctx->bits[1];
1501 MD5Transform(ctx->buf, (FcChar32 *) ctx->in);
1502 byteReverse((unsigned char *) ctx->buf, 4);
1503 memcpy(digest, ctx->buf, 16);
1504 memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
1508 /* The four core functions - F1 is optimized somewhat */
1510 /* #define F1(x, y, z) (x & y | ~x & z) */
1511 #define F1(x, y, z) (z ^ (x & (y ^ z)))
1512 #define F2(x, y, z) F1(z, x, y)
1513 #define F3(x, y, z) (x ^ y ^ z)
1514 #define F4(x, y, z) (y ^ (x | ~z))
1516 /* This is the central step in the MD5 algorithm. */
1517 #define MD5STEP(f, w, x, y, z, data, s) \
1518 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
1521 * The core of the MD5 algorithm, this alters an existing MD5 hash to
1522 * reflect the addition of 16 longwords of new data. MD5Update blocks
1523 * the data and converts bytes into longwords for this routine.
1525 static void MD5Transform(FcChar32 buf[4], FcChar32 in[16])
1527 register FcChar32 a, b, c, d;
1534 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
1535 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
1536 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
1537 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
1538 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
1539 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
1540 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
1541 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
1542 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
1543 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
1544 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
1545 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
1546 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
1547 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
1548 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
1549 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
1551 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
1552 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
1553 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
1554 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
1555 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
1556 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
1557 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
1558 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
1559 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
1560 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
1561 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
1562 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
1563 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
1564 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
1565 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
1566 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
1568 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
1569 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
1570 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
1571 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
1572 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
1573 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
1574 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
1575 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
1576 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
1577 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
1578 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
1579 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
1580 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
1581 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
1582 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
1583 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
1585 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
1586 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
1587 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
1588 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
1589 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
1590 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
1591 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
1592 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
1593 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
1594 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
1595 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
1596 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
1597 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
1598 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
1599 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
1600 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);