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 FcStrSetDestroy (d
->subdirs
);
161 FcMemFree (FC_MEM_STRING
, strlen (d
->name
)+1);
163 FcMemFree (FC_MEM_CACHE
, sizeof (FcGlobalCacheDir
));
168 FcGlobalCacheCreate (void)
170 FcGlobalCache
*cache
;
172 cache
= malloc (sizeof (FcGlobalCache
));
175 FcMemAlloc (FC_MEM_CACHE
, sizeof (FcGlobalCache
));
177 cache
->updated
= FcFalse
;
183 FcGlobalCacheDestroy (FcGlobalCache
*cache
)
185 FcGlobalCacheDir
*d
, *next
;
187 for (d
= cache
->dirs
; d
; d
= next
)
190 FcGlobalCacheDirDestroy (d
);
192 FcMemFree (FC_MEM_CACHE
, sizeof (FcGlobalCache
));
197 FcGlobalCacheLoad (FcGlobalCache
*cache
,
199 const FcChar8
*cache_file
,
202 char name_buf
[FC_MAX_FILE_LEN
];
203 FcGlobalCacheDir
*d
, *next
;
204 FcFileTime config_time
= FcConfigModifiedTime (config
);
205 char * current_arch_machine_name
;
206 char candidate_arch_machine_name
[MACHINE_SIGNATURE_SIZE
+ 9];
207 off_t current_arch_start
;
209 struct stat cache_stat
, dir_stat
;
210 char subdirName
[FC_MAX_FILE_LEN
+ 1 + 12 + 1];
212 if (stat ((char *) cache_file
, &cache_stat
) < 0)
215 cache
->fd
= open ((char *) cache_file
, O_RDONLY
);
219 cache
->updated
= FcFalse
;
221 if (!FcCacheReadString (cache
->fd
, name_buf
, sizeof (name_buf
)))
223 if (strcmp (name_buf
, FC_GLOBAL_MAGIC_COOKIE
) != 0)
226 current_arch_machine_name
= FcCacheMachineSignature ();
227 current_arch_start
= FcCacheSkipToArch(cache
->fd
,
228 current_arch_machine_name
);
229 if (current_arch_start
< 0)
230 goto bail_and_destroy
;
232 lseek (cache
->fd
, current_arch_start
, SEEK_SET
);
233 if (!FcCacheReadString (cache
->fd
, candidate_arch_machine_name
,
234 sizeof (candidate_arch_machine_name
)))
235 goto bail_and_destroy
;
236 if (strlen(candidate_arch_machine_name
) == 0)
237 goto bail_and_destroy
;
243 if (!FcCacheReadString (cache
->fd
, name_buf
, sizeof (name_buf
)) ||
247 /* Directory must be older than the global cache file; also
248 cache must be newer than the config file. */
249 if (stat ((char *) name_buf
, &dir_stat
) < 0 ||
250 dir_stat
.st_mtime
> cache_stat
.st_mtime
||
251 (config_time
.set
&& cache_stat
.st_mtime
< config_time
.time
))
255 FcStrSetAdd (staleDirs
, FcStrCopy ((FcChar8
*)name_buf
));
256 read (cache
->fd
, &md
, sizeof (FcCache
));
257 lseek (cache
->fd
, FcCacheNextOffset (lseek(cache
->fd
, 0, SEEK_CUR
)) + md
.count
, SEEK_SET
);
261 d
= malloc (sizeof (FcGlobalCacheDir
));
265 d
->next
= cache
->dirs
;
268 d
->name
= (char *)FcStrCopy ((FcChar8
*)name_buf
);
270 d
->offset
= lseek (cache
->fd
, 0, SEEK_CUR
);
272 d
->subdirs
= FcStrSetCreate();
275 if (!FcCacheReadString (cache
->fd
, subdirName
,
276 sizeof (subdirName
)) ||
277 !strlen (subdirName
))
279 FcStrSetAdd (d
->subdirs
, (FcChar8
*)subdirName
);
282 if (read (cache
->fd
, &d
->metadata
, sizeof (FcCache
)) != sizeof (FcCache
))
284 targ
= FcCacheNextOffset (lseek(cache
->fd
, 0, SEEK_CUR
)) + d
->metadata
.count
;
285 if (lseek (cache
->fd
, targ
, SEEK_SET
) != targ
)
291 for (d
= cache
->dirs
; d
; d
= next
)
306 if (stat ((char *) cache_file
, &cache_stat
) == 0)
307 unlink ((char *)cache_file
);
314 FcGlobalCacheReadDir (FcFontSet
*set
, FcStrSet
*dirs
, FcGlobalCache
* cache
, const char *dir
, FcConfig
*config
)
317 FcBool ret
= FcFalse
;
322 if (!(dir
= (char *)FcConfigNormalizeFontDir (config
, (FcChar8
*)dir
)))
323 return FcFalse
; /* non-existing directory */
325 for (d
= cache
->dirs
; d
; d
= d
->next
)
327 if (strncmp (d
->name
, dir
, strlen(dir
)) == 0)
329 lseek (cache
->fd
, d
->offset
, SEEK_SET
);
330 if (!FcDirCacheConsume (cache
->fd
, d
->name
, set
, config
))
332 if (strcmp (d
->name
, dir
) == 0)
341 FcGlobalCacheUpdate (FcGlobalCache
*cache
,
350 name
= (char *)FcConfigNormalizeFontDir (config
, (FcChar8
*)name
);
351 for (d
= cache
->dirs
; d
; d
= d
->next
)
353 if (strcmp(d
->name
, name
) == 0)
359 d
= malloc (sizeof (FcGlobalCacheDir
));
362 d
->next
= cache
->dirs
;
366 cache
->updated
= FcTrue
;
368 d
->name
= (char *)FcStrCopy ((FcChar8
*)name
);
369 d
->ent
= FcDirCacheProduce (set
, &d
->metadata
);
371 d
->subdirs
= FcStrSetCreate();
372 for (i
= 0; i
< dirs
->num
; i
++)
373 FcStrSetAdd (d
->subdirs
, dirs
->strs
[i
]);
378 FcGlobalCacheSave (FcGlobalCache
*cache
,
379 const FcChar8
*cache_file
,
383 FcGlobalCacheDir
*dir
;
385 off_t current_arch_start
= 0, truncate_to
;
386 char * current_arch_machine_name
, * header
;
391 #if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
392 /* Set-UID programs can't safely update the cache */
393 if (getuid () != geteuid ())
397 atomic
= FcAtomicCreate (cache_file
);
401 if (!FcAtomicLock (atomic
))
403 fd
= open ((char *) FcAtomicNewFile(atomic
), O_RDWR
| O_CREAT
,
407 FcCacheWriteString (fd
, FC_GLOBAL_MAGIC_COOKIE
);
409 fd_orig
= open ((char *) FcAtomicOrigFile(atomic
), O_RDONLY
);
411 current_arch_machine_name
= FcCacheMachineSignature ();
413 current_arch_start
= 0;
415 current_arch_start
= FcCacheSkipToArch (fd_orig
,
416 current_arch_machine_name
);
418 if (current_arch_start
< 0)
420 off_t i
= lseek(fd_orig
, 0, SEEK_END
);
421 if (i
< strlen (FC_GLOBAL_MAGIC_COOKIE
)+1)
422 i
= strlen (FC_GLOBAL_MAGIC_COOKIE
)+1;
423 current_arch_start
= FcCacheNextOffset (i
);
426 if (!FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
432 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
433 if (ftruncate (fd
, current_arch_start
) == -1)
436 header
= malloc (10 + strlen (current_arch_machine_name
));
440 truncate_to
= current_arch_start
+ strlen(current_arch_machine_name
) + 11;
441 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
443 truncate_to
+= strlen(dir
->name
) + 1;
444 truncate_to
+= sizeof (FcCache
);
445 truncate_to
= FcCacheNextOffset (truncate_to
);
446 truncate_to
+= dir
->metadata
.count
;
448 for (i
= 0; i
< dir
->subdirs
->size
; i
++)
449 truncate_to
+= strlen((char *)dir
->subdirs
->strs
[i
]) + 1;
452 truncate_to
-= current_arch_start
;
454 sprintf (header
, "%8x ", (int)truncate_to
);
455 strcat (header
, current_arch_machine_name
);
456 if (!FcCacheWriteString (fd
, header
))
459 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
463 const char * d
= (const char *)FcConfigNormalizeFontDir (config
, (const FcChar8
*)dir
->name
);
465 FcCacheWriteString (fd
, d
);
467 for (i
= 0; i
< dir
->subdirs
->size
; i
++)
468 FcCacheWriteString (fd
, (char *)dir
->subdirs
->strs
[i
]);
469 FcCacheWriteString (fd
, "");
471 write (fd
, &dir
->metadata
, sizeof(FcCache
));
472 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
)), SEEK_SET
);
473 write (fd
, dir
->ent
, dir
->metadata
.count
);
477 FcCacheWriteString (fd
, "");
479 if (close (fd
) == -1)
482 if (!FcAtomicReplaceOrig (atomic
))
485 FcAtomicUnlock (atomic
);
486 FcAtomicDestroy (atomic
);
488 cache
->updated
= FcFalse
;
499 FcAtomicDeleteNew (atomic
);
501 FcAtomicUnlock (atomic
);
503 FcAtomicDestroy (atomic
);
508 * Find the next presumably-mmapable offset after the supplied file
512 FcCacheNextOffset(off_t w
)
514 static long pagesize
= -1;
516 pagesize
= sysconf(_SC_PAGESIZE
);
517 if (w
% pagesize
== 0)
520 return ((w
/ pagesize
)+1)*pagesize
;
523 /* return the address of the segment for the provided arch,
524 * or -1 if arch not found */
526 FcCacheSkipToArch (int fd
, const char * arch
)
528 char candidate_arch_machine_name_count
[MACHINE_SIGNATURE_SIZE
+ 9];
529 char * candidate_arch
;
530 off_t current_arch_start
= 0;
532 lseek (fd
, 0, SEEK_SET
);
533 FcCacheSkipString (fd
);
534 current_arch_start
= lseek (fd
, 0, SEEK_CUR
);
536 /* skip arches that are not the current arch */
541 if (lseek (fd
, current_arch_start
, SEEK_SET
) != current_arch_start
)
544 if (FcCacheReadString (fd
, candidate_arch_machine_name_count
,
545 sizeof (candidate_arch_machine_name_count
)) == 0)
547 if (!strlen(candidate_arch_machine_name_count
))
549 bs
= strtol(candidate_arch_machine_name_count
, &candidate_arch
, 16);
551 // count = 0 should probably be distinguished from the !bs condition
552 if (!bs
|| bs
< strlen (candidate_arch_machine_name_count
))
555 candidate_arch
++; /* skip leading space */
557 if (strcmp (candidate_arch
, arch
)==0)
558 return current_arch_start
;
559 current_arch_start
+= bs
;
565 /* Cuts out the segment at the file pointer (moves everything else
566 * down to cover it), and leaves the file pointer at the end of the
569 FcCacheCopyOld (int fd
, int fd_orig
, off_t start
)
571 char * buf
= malloc (8192);
572 char candidate_arch_machine_name
[MACHINE_SIGNATURE_SIZE
+ 9];
574 int c
, bytes_skipped
;
581 lseek (fd
, 0, SEEK_SET
); lseek (fd_orig
, 0, SEEK_SET
);
588 if ((c
= read (fd_orig
, buf
, b
)) <= 0)
590 if (write (fd
, buf
, c
) < 0)
597 lseek (fd
, start
, SEEK_SET
);
598 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
599 sizeof (candidate_arch_machine_name
)) == 0)
601 if (!strlen(candidate_arch_machine_name
))
604 bs
= strtol(candidate_arch_machine_name
, 0, 16);
611 lseek (fd
, start
+bs
+bytes_skipped
, SEEK_SET
);
612 if ((c
= read (fd
, buf
, 8192)) <= 0)
614 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
615 if (write (fd
, buf
, c
) < 0)
620 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
631 /* Does not check that the cache has the appropriate arch section. */
632 /* Also, this can be fooled if the original location has a stale
633 * cache, and the hashed location has an up-to-date cache. Oh well,
634 * sucks to be you in that case! */
636 FcDirCacheValid (const FcChar8
*dir
)
638 struct stat file_stat
, dir_stat
;
641 if (stat ((char *) dir
, &dir_stat
) < 0)
644 fd
= FcDirCacheOpen (dir
);
648 if (fstat (fd
, &file_stat
) < 0)
654 * If the directory has been modified more recently than
655 * the cache file, the cache is not valid
657 if (dir_stat
.st_mtime
> file_stat
.st_mtime
)
667 /* Assumes that the cache file in 'dir' exists.
668 * Checks that the cache has the appropriate arch section. */
670 FcDirCacheHasCurrentArch (const FcChar8
*dir
)
673 off_t current_arch_start
;
674 char *current_arch_machine_name
;
676 fd
= FcDirCacheOpen (dir
);
680 current_arch_machine_name
= FcCacheMachineSignature();
681 current_arch_start
= FcCacheSkipToArch(fd
, current_arch_machine_name
);
684 if (current_arch_start
< 0)
694 FcDirCacheUnlink (const FcChar8
*dir
, FcConfig
*config
)
697 char *cache_hashed
= 0;
699 struct stat cache_stat
;
700 char name_buf
[FC_MAX_FILE_LEN
];
702 dir
= FcConfigNormalizeFontDir (config
, dir
);
703 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
707 /* First remove normal cache file. */
708 if (stat ((char *) cache_file
, &cache_stat
) == 0 &&
709 unlink ((char *)cache_file
) != 0)
712 /* Next remove any applicable hashed files. */
713 fd
= -1; collisions
= 0;
717 FcStrFree ((FcChar8
*)cache_hashed
);
719 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
725 fd
= open(cache_hashed
, O_RDONLY
);
728 FcStrFree ((FcChar8
*)cache_file
);
732 if (!FcCacheReadString (fd
, name_buf
, sizeof (name_buf
)) || !strlen(name_buf
))
734 FcStrFree ((FcChar8
*)cache_hashed
);
737 } while (strcmp (name_buf
, cache_file
) != 0);
739 FcStrFree ((FcChar8
*)cache_file
);
742 if (stat ((char *) cache_hashed
, &cache_stat
) == 0 &&
743 unlink ((char *)cache_hashed
) != 0)
745 FcStrFree ((FcChar8
*)cache_hashed
);
749 FcStrFree ((FcChar8
*)cache_hashed
);
753 FcStrFree ((FcChar8
*)cache_file
);
758 FcCacheReadDirs (FcConfig
* config
, FcGlobalCache
* cache
,
759 FcStrList
*list
, FcFontSet
* set
)
763 FcChar8
*file
, *base
;
769 * Read in the results from 'list'.
771 while ((dir
= FcStrListNext (list
)))
773 if (!FcConfigAcceptFilename (config
, dir
))
777 file
= (FcChar8
*) malloc (strlen ((char *) dir
) + 1 + FC_MAX_FILE_LEN
+ 1);
781 strcpy ((char *) file
, (char *) dir
);
782 strcat ((char *) file
, "/");
783 base
= file
+ strlen ((char *) file
);
785 subdirs
= FcStrSetCreate ();
788 fprintf (stderr
, "Can't create directory set\n");
794 if (access ((char *) dir
, X_OK
) < 0)
802 fprintf (stderr
, "\"%s\": ", dir
);
806 FcStrSetDestroy (subdirs
);
810 if (stat ((char *) dir
, &statb
) == -1)
812 fprintf (stderr
, "\"%s\": ", dir
);
814 FcStrSetDestroy (subdirs
);
819 if (!S_ISDIR (statb
.st_mode
))
821 fprintf (stderr
, "\"%s\": not a directory, skipping\n", dir
);
822 FcStrSetDestroy (subdirs
);
826 if (!FcDirCacheValid (dir
) || !FcDirCacheRead (set
, subdirs
, dir
, config
))
828 if (FcDebug () & FC_DBG_FONTSET
)
829 printf ("cache scan dir %s\n", dir
);
831 FcDirScanConfig (set
, subdirs
, cache
,
832 config
->blanks
, dir
, FcFalse
, config
);
834 sublist
= FcStrListCreate (subdirs
);
835 FcStrSetDestroy (subdirs
);
838 fprintf (stderr
, "Can't create subdir list in \"%s\"\n", dir
);
843 ret
+= FcCacheReadDirs (config
, cache
, sublist
, set
);
846 FcStrListDone (list
);
851 FcCacheRead (FcConfig
*config
, FcGlobalCache
* cache
)
853 FcFontSet
* s
= FcFontSetCreate();
857 if (FcCacheReadDirs (config
, cache
, FcConfigGetConfigDirs (config
), s
))
863 FcFontSetDestroy (s
);
867 static const char bin2hex
[] = { '0', '1', '2', '3',
870 'c', 'd', 'e', 'f' };
873 FcDirCacheHashName (char * cache_file
, int collisions
)
875 unsigned char hash
[16], hex_hash
[33];
877 unsigned char uscore
= '_';
880 struct MD5Context ctx
;
883 MD5Update (&ctx
, (unsigned char *)cache_file
, strlen (cache_file
));
885 for (i
= 0; i
< collisions
; i
++)
886 MD5Update (&ctx
, &uscore
, 1);
888 MD5Final (hash
, &ctx
);
890 for (cnt
= 0; cnt
< 16; ++cnt
)
892 hex_hash
[2*cnt
] = bin2hex
[hash
[cnt
] >> 4];
893 hex_hash
[2*cnt
+1] = bin2hex
[hash
[cnt
] & 0xf];
897 tmp
= FcStrPlus ((FcChar8
*)hex_hash
, (FcChar8
*)FC_CACHE_SUFFIX
);
901 cache_hashed
= (char *)FcStrPlus ((FcChar8
*)PKGCACHEDIR
"/", tmp
);
907 /* Opens the hashed name for cache_file.
908 * This would fail in the unlikely event of a collision and subsequent
909 * removal of the file which originally caused the collision. */
911 FcDirCacheOpen (const FcChar8
*dir
)
914 int fd
= -1, collisions
= 0;
915 char *cache_file
, *cache_hashed
;
916 char name_buf
[FC_MAX_FILE_LEN
];
917 struct stat dir_stat
;
919 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
923 fd
= open(cache_file
, O_RDONLY
);
927 if (stat ((char *)dir
, &dir_stat
) == -1)
934 FcChar8
* name_buf_dir
;
936 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
939 FcStrFree ((FcChar8
*)cache_file
);
945 fd
= open(cache_hashed
, O_RDONLY
);
946 FcStrFree ((FcChar8
*)cache_hashed
);
950 FcStrFree ((FcChar8
*)cache_file
);
953 if (!FcCacheReadString (fd
, name_buf
, sizeof (name_buf
)) || !strlen(name_buf
))
956 name_buf_dir
= FcStrDirname ((FcChar8
*)name_buf
);
957 if (stat ((char *)name_buf_dir
, &c
) == -1)
959 FcStrFree (name_buf_dir
);
962 FcStrFree (name_buf_dir
);
963 found
= (c
.st_ino
== dir_stat
.st_ino
) && (c
.st_dev
== dir_stat
.st_dev
);
965 FcStrFree ((FcChar8
*)cache_file
);
969 FcStrFree ((FcChar8
*)cache_file
);
974 /* read serialized state from the cache file */
976 FcDirCacheRead (FcFontSet
* set
, FcStrSet
* dirs
, const FcChar8
*dir
, FcConfig
*config
)
979 char *current_arch_machine_name
;
980 char candidate_arch_machine_name
[9+MACHINE_SIGNATURE_SIZE
];
981 off_t current_arch_start
= 0;
982 char subdirName
[FC_MAX_FILE_LEN
+ 1 + 12 + 1];
984 fd
= FcDirCacheOpen (dir
);
988 current_arch_machine_name
= FcCacheMachineSignature();
989 current_arch_start
= FcCacheSkipToArch(fd
,
990 current_arch_machine_name
);
991 if (current_arch_start
< 0)
994 lseek (fd
, current_arch_start
, SEEK_SET
);
995 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
996 sizeof (candidate_arch_machine_name
)) == 0)
999 while (FcCacheReadString (fd
, subdirName
, sizeof (subdirName
)) && strlen (subdirName
) > 0)
1000 FcStrSetAdd (dirs
, (FcChar8
*)subdirName
);
1002 if (!FcDirCacheConsume (fd
, (const char *)dir
, set
, config
))
1015 FcDirCacheConsume (int fd
, const char * dir
, FcFontSet
*set
, FcConfig
*config
)
1018 void * current_dir_block
;
1021 read(fd
, &metadata
, sizeof(FcCache
));
1022 if (metadata
.magic
!= FC_CACHE_MAGIC
)
1025 if (!metadata
.count
)
1027 pos
= FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
));
1028 lseek (fd
, pos
, SEEK_SET
);
1030 FcConfigAddFontDir (config
, (FcChar8
*)dir
);
1034 pos
= FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
));
1035 current_dir_block
= mmap (0, metadata
.count
,
1036 PROT_READ
, MAP_SHARED
, fd
, pos
);
1037 lseek (fd
, pos
+metadata
.count
, SEEK_SET
);
1038 if (current_dir_block
== MAP_FAILED
)
1041 FcCacheAddBankDir (metadata
.bank
, dir
);
1043 FcConfigAddFontDir (config
, (FcChar8
*)dir
);
1045 if (!FcFontSetUnserialize (&metadata
, set
, current_dir_block
))
1052 FcDirCacheProduce (FcFontSet
*set
, FcCache
*metadata
)
1054 void * current_dir_block
, * final_dir_block
;
1055 static unsigned int rand_state
= 0;
1056 int bank
, needed_bytes_no_align
;
1059 rand_state
= time(0L);
1060 bank
= rand_r(&rand_state
);
1062 while (FcCacheHaveBank(bank
))
1063 bank
= rand_r(&rand_state
);
1065 memset (metadata
, 0, sizeof(FcCache
));
1067 needed_bytes_no_align
= FcFontSetNeededBytes (set
);
1068 metadata
->count
= needed_bytes_no_align
+
1069 FcFontSetNeededBytesAlign ();
1070 metadata
->magic
= FC_CACHE_MAGIC
;
1071 metadata
->bank
= bank
;
1073 if (!needed_bytes_no_align
) /* not a failure, no fonts to write */
1075 /* no, you don't really need to write any bytes at all. */
1076 metadata
->count
= 0;
1080 current_dir_block
= malloc (metadata
->count
);
1081 if (!current_dir_block
)
1084 memset (current_dir_block
, 0, metadata
->count
);
1085 final_dir_block
= FcFontSetDistributeBytes (metadata
, current_dir_block
);
1087 if ((void *)((char *)current_dir_block
+metadata
->count
) < final_dir_block
)
1090 if (!FcFontSetSerialize (bank
, set
))
1093 return current_dir_block
;
1096 free (current_dir_block
);
1100 /* write serialized state to the cache file */
1102 FcDirCacheWrite (FcFontSet
*set
, FcStrSet
*dirs
, const FcChar8
*dir
)
1106 int fd
, fd_orig
, i
, dirs_count
;
1109 off_t current_arch_start
= 0, truncate_to
;
1110 char name_buf
[FC_MAX_FILE_LEN
];
1113 char *current_arch_machine_name
, * header
;
1114 void *current_dir_block
= 0;
1116 dir
= FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir
);
1120 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
1124 /* Ensure that we're not trampling a cache for some other dir. */
1125 /* This is slightly different from FcDirCacheOpen, since it
1126 * needs the filename, not the file descriptor. */
1127 fd
= -1; collisions
= 0;
1130 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
1136 fd
= open(cache_hashed
, O_RDONLY
);
1139 if(!FcCacheReadString (fd
, name_buf
, sizeof (name_buf
)) || !strlen(name_buf
))
1146 if (strcmp (name_buf
, cache_file
) != 0)
1150 current_dir_block
= FcDirCacheProduce (set
, &metadata
);
1152 if (metadata
.count
&& !current_dir_block
)
1155 if (FcDebug () & FC_DBG_CACHE
)
1156 printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file
);
1158 atomic
= FcAtomicCreate ((FcChar8
*)cache_hashed
);
1162 if (!FcAtomicLock (atomic
))
1164 /* Now try rewriting the original version of the file. */
1165 FcAtomicDestroy (atomic
);
1167 atomic
= FcAtomicCreate ((FcChar8
*)cache_file
);
1168 fd_orig
= open (cache_file
, O_RDONLY
);
1170 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1172 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1177 /* In all cases, try opening the real location of the cache file first. */
1178 /* (even if that's not atomic.) */
1179 fd_orig
= open (cache_file
, O_RDONLY
);
1181 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1183 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1187 FcCacheWriteString (fd
, cache_file
);
1189 current_arch_machine_name
= FcCacheMachineSignature ();
1190 current_arch_start
= 0;
1193 current_arch_start
=
1194 FcCacheSkipToArch(fd_orig
, current_arch_machine_name
);
1196 if (current_arch_start
< 0)
1198 off_t i
= lseek(fd_orig
, 0, SEEK_END
);
1199 if (i
< strlen (FC_GLOBAL_MAGIC_COOKIE
)+1)
1200 i
= strlen (FC_GLOBAL_MAGIC_COOKIE
)+1;
1201 current_arch_start
= FcCacheNextOffset (i
);
1204 if (fd_orig
!= -1 && !FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
1210 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
1211 if (ftruncate (fd
, current_arch_start
) == -1)
1214 /* allocate space for subdir names in this block */
1216 for (i
= 0; i
< dirs
->size
; i
++)
1217 dirs_count
+= strlen((char *)dirs
->strs
[i
]) + 1;
1220 /* now write the address of the next offset */
1221 truncate_to
= FcCacheNextOffset (FcCacheNextOffset (current_arch_start
+ sizeof (FcCache
) + dirs_count
) + metadata
.count
) - current_arch_start
;
1222 header
= malloc (10 + strlen (current_arch_machine_name
));
1225 sprintf (header
, "%8x ", (int)truncate_to
);
1226 strcat (header
, current_arch_machine_name
);
1227 if (!FcCacheWriteString (fd
, header
))
1230 for (i
= 0; i
< dirs
->size
; i
++)
1231 FcCacheWriteString (fd
, (char *)dirs
->strs
[i
]);
1232 FcCacheWriteString (fd
, "");
1234 write (fd
, &metadata
, sizeof(FcCache
));
1237 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_END
)), SEEK_SET
);
1238 write (fd
, current_dir_block
, metadata
.count
);
1239 free (current_dir_block
);
1242 /* this actually serves to pad out the cache file, if needed */
1243 if (ftruncate (fd
, current_arch_start
+ truncate_to
) == -1)
1248 if (!FcAtomicReplaceOrig(atomic
))
1250 FcStrFree ((FcChar8
*)cache_hashed
);
1251 FcStrFree ((FcChar8
*)cache_file
);
1252 FcAtomicUnlock (atomic
);
1253 FcAtomicDestroy (atomic
);
1261 FcAtomicUnlock (atomic
);
1263 FcAtomicDestroy (atomic
);
1265 FcStrFree ((FcChar8
*)cache_hashed
);
1267 unlink ((char *)cache_file
);
1268 FcStrFree ((FcChar8
*)cache_file
);
1269 if (current_dir_block
)
1270 free (current_dir_block
);
1276 FcCacheMachineSignature ()
1278 static char buf
[MACHINE_SIGNATURE_SIZE
];
1279 int32_t magic
= ENDIAN_TEST
;
1280 char * m
= (char *)&magic
;
1282 sprintf (buf
, "%2x%2x%2x%2x "
1283 "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
1284 "%4x %4x %4x %4x %4x %4x %4x %4x\n",
1285 m
[0], m
[1], m
[2], m
[3],
1286 (unsigned int)sizeof (char),
1287 (unsigned int)sizeof (char *),
1288 (unsigned int)sizeof (int),
1289 (unsigned int)sizeof (FcPattern
),
1290 (unsigned int)sizeof (FcPatternEltPtr
),
1291 (unsigned int)sizeof (struct _FcPatternElt
*),
1292 (unsigned int)sizeof (FcPatternElt
),
1293 (unsigned int)sizeof (FcObjectPtr
),
1294 (unsigned int)sizeof (FcValueListPtr
),
1295 (unsigned int)sizeof (FcValue
),
1296 (unsigned int)sizeof (FcValueBinding
),
1297 (unsigned int)sizeof (struct _FcValueList
*),
1298 (unsigned int)sizeof (FcCharSet
),
1299 (unsigned int)sizeof (FcCharLeaf
**),
1300 (unsigned int)sizeof (FcChar16
*),
1301 (unsigned int)sizeof (FcChar16
),
1302 (unsigned int)sizeof (FcCharLeaf
),
1303 (unsigned int)sizeof (FcChar32
),
1304 (unsigned int)sizeof (FcCache
),
1305 (unsigned int)sysconf(_SC_PAGESIZE
));
1310 static int banks_ptr
= 0, banks_alloc
= 0;
1311 int * _fcBankId
= 0, * _fcBankIdx
= 0;
1312 static const char ** bankDirs
= 0;
1315 FcCacheHaveBank (int bank
)
1319 if (bank
< FC_BANK_FIRST
)
1322 for (i
= 0; i
< banks_ptr
; i
++)
1323 if (_fcBankId
[i
] == bank
)
1330 FcCacheBankToIndexMTF (int bank
)
1334 for (i
= 0; i
< banks_ptr
; i
++)
1335 if (_fcBankId
[_fcBankIdx
[i
]] == bank
)
1337 int t
= _fcBankIdx
[i
];
1339 for (j
= i
; j
> 0; j
--)
1340 _fcBankIdx
[j
] = _fcBankIdx
[j
-1];
1345 if (banks_ptr
>= banks_alloc
)
1350 b
= realloc (_fcBankId
, (banks_alloc
+ 4) * sizeof(int));
1355 bidx
= realloc (_fcBankIdx
, (banks_alloc
+ 4) * sizeof(int));
1360 bds
= realloc (bankDirs
, (banks_alloc
+ 4) * sizeof (char *));
1369 _fcBankId
[i
] = bank
;
1375 FcCacheAddBankDir (int bank
, const char * dir
)
1377 int bi
= FcCacheBankToIndexMTF (bank
);
1382 bankDirs
[bi
] = (const char *)FcStrCopy ((FcChar8
*)dir
);
1386 FcCacheFindBankDir (int bank
)
1388 int bi
= FcCacheBankToIndex (bank
);
1389 return bankDirs
[bi
];
1393 * This code implements the MD5 message-digest algorithm.
1394 * The algorithm is due to Ron Rivest. This code was
1395 * written by Colin Plumb in 1993, no copyright is claimed.
1396 * This code is in the public domain; do with it what you wish.
1398 * Equivalent code is available from RSA Data Security, Inc.
1399 * This code has been tested against that, and is equivalent,
1400 * except that you don't need to include two pages of legalese
1403 * To compute the message digest of a chunk of bytes, declare an
1404 * MD5Context structure, pass it to MD5Init, call MD5Update as
1405 * needed on buffers full of bytes, and then call MD5Final, which
1406 * will fill a supplied 16-byte array with the digest.
1410 #define byteReverse(buf, len) /* Nothing */
1413 * Note: this code is harmless on little-endian machines.
1415 void byteReverse(unsigned char *buf
, unsigned longs
)
1419 t
= (FcChar32
) ((unsigned) buf
[3] << 8 | buf
[2]) << 16 |
1420 ((unsigned) buf
[1] << 8 | buf
[0]);
1421 *(FcChar32
*) buf
= t
;
1428 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
1429 * initialization constants.
1431 static void MD5Init(struct MD5Context
*ctx
)
1433 ctx
->buf
[0] = 0x67452301;
1434 ctx
->buf
[1] = 0xefcdab89;
1435 ctx
->buf
[2] = 0x98badcfe;
1436 ctx
->buf
[3] = 0x10325476;
1443 * Update context to reflect the concatenation of another buffer full
1446 static void MD5Update(struct MD5Context
*ctx
, unsigned char *buf
, unsigned len
)
1450 /* Update bitcount */
1453 if ((ctx
->bits
[0] = t
+ ((FcChar32
) len
<< 3)) < t
)
1454 ctx
->bits
[1]++; /* Carry from low to high */
1455 ctx
->bits
[1] += len
>> 29;
1457 t
= (t
>> 3) & 0x3f; /* Bytes already in shsInfo->data */
1459 /* Handle any leading odd-sized chunks */
1462 unsigned char *p
= (unsigned char *) ctx
->in
+ t
;
1466 memcpy(p
, buf
, len
);
1470 byteReverse(ctx
->in
, 16);
1471 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1475 /* Process data in 64-byte chunks */
1478 memcpy(ctx
->in
, buf
, 64);
1479 byteReverse(ctx
->in
, 16);
1480 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1485 /* Handle any remaining bytes of data. */
1487 memcpy(ctx
->in
, buf
, len
);
1491 * Final wrapup - pad to 64-byte boundary with the bit pattern
1492 * 1 0* (64-bit count of bits processed, MSB-first)
1494 static void MD5Final(unsigned char digest
[16], struct MD5Context
*ctx
)
1499 /* Compute number of bytes mod 64 */
1500 count
= (ctx
->bits
[0] >> 3) & 0x3F;
1502 /* Set the first char of padding to 0x80. This is safe since there is
1503 always at least one byte free */
1504 p
= ctx
->in
+ count
;
1507 /* Bytes of padding needed to make 64 bytes */
1508 count
= 64 - 1 - count
;
1510 /* Pad out to 56 mod 64 */
1512 /* Two lots of padding: Pad the first block to 64 bytes */
1513 memset(p
, 0, count
);
1514 byteReverse(ctx
->in
, 16);
1515 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1517 /* Now fill the next block with 56 bytes */
1518 memset(ctx
->in
, 0, 56);
1520 /* Pad block to 56 bytes */
1521 memset(p
, 0, count
- 8);
1523 byteReverse(ctx
->in
, 14);
1525 /* Append length in bits and transform */
1526 ((FcChar32
*) ctx
->in
)[14] = ctx
->bits
[0];
1527 ((FcChar32
*) ctx
->in
)[15] = ctx
->bits
[1];
1529 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1530 byteReverse((unsigned char *) ctx
->buf
, 4);
1531 memcpy(digest
, ctx
->buf
, 16);
1532 memset(ctx
, 0, sizeof(ctx
)); /* In case it's sensitive */
1536 /* The four core functions - F1 is optimized somewhat */
1538 /* #define F1(x, y, z) (x & y | ~x & z) */
1539 #define F1(x, y, z) (z ^ (x & (y ^ z)))
1540 #define F2(x, y, z) F1(z, x, y)
1541 #define F3(x, y, z) (x ^ y ^ z)
1542 #define F4(x, y, z) (y ^ (x | ~z))
1544 /* This is the central step in the MD5 algorithm. */
1545 #define MD5STEP(f, w, x, y, z, data, s) \
1546 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
1549 * The core of the MD5 algorithm, this alters an existing MD5 hash to
1550 * reflect the addition of 16 longwords of new data. MD5Update blocks
1551 * the data and converts bytes into longwords for this routine.
1553 static void MD5Transform(FcChar32 buf
[4], FcChar32 in
[16])
1555 register FcChar32 a
, b
, c
, d
;
1562 MD5STEP(F1
, a
, b
, c
, d
, in
[0] + 0xd76aa478, 7);
1563 MD5STEP(F1
, d
, a
, b
, c
, in
[1] + 0xe8c7b756, 12);
1564 MD5STEP(F1
, c
, d
, a
, b
, in
[2] + 0x242070db, 17);
1565 MD5STEP(F1
, b
, c
, d
, a
, in
[3] + 0xc1bdceee, 22);
1566 MD5STEP(F1
, a
, b
, c
, d
, in
[4] + 0xf57c0faf, 7);
1567 MD5STEP(F1
, d
, a
, b
, c
, in
[5] + 0x4787c62a, 12);
1568 MD5STEP(F1
, c
, d
, a
, b
, in
[6] + 0xa8304613, 17);
1569 MD5STEP(F1
, b
, c
, d
, a
, in
[7] + 0xfd469501, 22);
1570 MD5STEP(F1
, a
, b
, c
, d
, in
[8] + 0x698098d8, 7);
1571 MD5STEP(F1
, d
, a
, b
, c
, in
[9] + 0x8b44f7af, 12);
1572 MD5STEP(F1
, c
, d
, a
, b
, in
[10] + 0xffff5bb1, 17);
1573 MD5STEP(F1
, b
, c
, d
, a
, in
[11] + 0x895cd7be, 22);
1574 MD5STEP(F1
, a
, b
, c
, d
, in
[12] + 0x6b901122, 7);
1575 MD5STEP(F1
, d
, a
, b
, c
, in
[13] + 0xfd987193, 12);
1576 MD5STEP(F1
, c
, d
, a
, b
, in
[14] + 0xa679438e, 17);
1577 MD5STEP(F1
, b
, c
, d
, a
, in
[15] + 0x49b40821, 22);
1579 MD5STEP(F2
, a
, b
, c
, d
, in
[1] + 0xf61e2562, 5);
1580 MD5STEP(F2
, d
, a
, b
, c
, in
[6] + 0xc040b340, 9);
1581 MD5STEP(F2
, c
, d
, a
, b
, in
[11] + 0x265e5a51, 14);
1582 MD5STEP(F2
, b
, c
, d
, a
, in
[0] + 0xe9b6c7aa, 20);
1583 MD5STEP(F2
, a
, b
, c
, d
, in
[5] + 0xd62f105d, 5);
1584 MD5STEP(F2
, d
, a
, b
, c
, in
[10] + 0x02441453, 9);
1585 MD5STEP(F2
, c
, d
, a
, b
, in
[15] + 0xd8a1e681, 14);
1586 MD5STEP(F2
, b
, c
, d
, a
, in
[4] + 0xe7d3fbc8, 20);
1587 MD5STEP(F2
, a
, b
, c
, d
, in
[9] + 0x21e1cde6, 5);
1588 MD5STEP(F2
, d
, a
, b
, c
, in
[14] + 0xc33707d6, 9);
1589 MD5STEP(F2
, c
, d
, a
, b
, in
[3] + 0xf4d50d87, 14);
1590 MD5STEP(F2
, b
, c
, d
, a
, in
[8] + 0x455a14ed, 20);
1591 MD5STEP(F2
, a
, b
, c
, d
, in
[13] + 0xa9e3e905, 5);
1592 MD5STEP(F2
, d
, a
, b
, c
, in
[2] + 0xfcefa3f8, 9);
1593 MD5STEP(F2
, c
, d
, a
, b
, in
[7] + 0x676f02d9, 14);
1594 MD5STEP(F2
, b
, c
, d
, a
, in
[12] + 0x8d2a4c8a, 20);
1596 MD5STEP(F3
, a
, b
, c
, d
, in
[5] + 0xfffa3942, 4);
1597 MD5STEP(F3
, d
, a
, b
, c
, in
[8] + 0x8771f681, 11);
1598 MD5STEP(F3
, c
, d
, a
, b
, in
[11] + 0x6d9d6122, 16);
1599 MD5STEP(F3
, b
, c
, d
, a
, in
[14] + 0xfde5380c, 23);
1600 MD5STEP(F3
, a
, b
, c
, d
, in
[1] + 0xa4beea44, 4);
1601 MD5STEP(F3
, d
, a
, b
, c
, in
[4] + 0x4bdecfa9, 11);
1602 MD5STEP(F3
, c
, d
, a
, b
, in
[7] + 0xf6bb4b60, 16);
1603 MD5STEP(F3
, b
, c
, d
, a
, in
[10] + 0xbebfbc70, 23);
1604 MD5STEP(F3
, a
, b
, c
, d
, in
[13] + 0x289b7ec6, 4);
1605 MD5STEP(F3
, d
, a
, b
, c
, in
[0] + 0xeaa127fa, 11);
1606 MD5STEP(F3
, c
, d
, a
, b
, in
[3] + 0xd4ef3085, 16);
1607 MD5STEP(F3
, b
, c
, d
, a
, in
[6] + 0x04881d05, 23);
1608 MD5STEP(F3
, a
, b
, c
, d
, in
[9] + 0xd9d4d039, 4);
1609 MD5STEP(F3
, d
, a
, b
, c
, in
[12] + 0xe6db99e5, 11);
1610 MD5STEP(F3
, c
, d
, a
, b
, in
[15] + 0x1fa27cf8, 16);
1611 MD5STEP(F3
, b
, c
, d
, a
, in
[2] + 0xc4ac5665, 23);
1613 MD5STEP(F4
, a
, b
, c
, d
, in
[0] + 0xf4292244, 6);
1614 MD5STEP(F4
, d
, a
, b
, c
, in
[7] + 0x432aff97, 10);
1615 MD5STEP(F4
, c
, d
, a
, b
, in
[14] + 0xab9423a7, 15);
1616 MD5STEP(F4
, b
, c
, d
, a
, in
[5] + 0xfc93a039, 21);
1617 MD5STEP(F4
, a
, b
, c
, d
, in
[12] + 0x655b59c3, 6);
1618 MD5STEP(F4
, d
, a
, b
, c
, in
[3] + 0x8f0ccc92, 10);
1619 MD5STEP(F4
, c
, d
, a
, b
, in
[10] + 0xffeff47d, 15);
1620 MD5STEP(F4
, b
, c
, d
, a
, in
[1] + 0x85845dd1, 21);
1621 MD5STEP(F4
, a
, b
, c
, d
, in
[8] + 0x6fa87e4f, 6);
1622 MD5STEP(F4
, d
, a
, b
, c
, in
[15] + 0xfe2ce6e0, 10);
1623 MD5STEP(F4
, c
, d
, a
, b
, in
[6] + 0xa3014314, 15);
1624 MD5STEP(F4
, b
, c
, d
, a
, in
[13] + 0x4e0811a1, 21);
1625 MD5STEP(F4
, a
, b
, c
, d
, in
[4] + 0xf7537e82, 6);
1626 MD5STEP(F4
, d
, a
, b
, c
, in
[11] + 0xbd3af235, 10);
1627 MD5STEP(F4
, c
, d
, a
, b
, in
[2] + 0x2ad7d2bb, 15);
1628 MD5STEP(F4
, b
, c
, d
, a
, in
[9] + 0xeb86d391, 21);