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 FcCacheReadString (cache
->fd
, name_buf
, sizeof (name_buf
));
222 if (strcmp (name_buf
, FC_GLOBAL_MAGIC_COOKIE
) != 0)
225 current_arch_machine_name
= FcCacheMachineSignature ();
226 current_arch_start
= FcCacheSkipToArch(cache
->fd
,
227 current_arch_machine_name
);
228 if (current_arch_start
< 0)
229 goto bail_and_destroy
;
231 lseek (cache
->fd
, current_arch_start
, SEEK_SET
);
232 FcCacheReadString (cache
->fd
, candidate_arch_machine_name
,
233 sizeof (candidate_arch_machine_name
));
234 if (strlen(candidate_arch_machine_name
) == 0)
235 goto bail_and_destroy
;
241 FcCacheReadString (cache
->fd
, name_buf
, sizeof (name_buf
));
242 if (!strlen(name_buf
))
245 /* Directory must be older than the global cache file; also
246 cache must be newer than the config file. */
247 if (stat ((char *) name_buf
, &dir_stat
) < 0 ||
248 dir_stat
.st_mtime
> cache_stat
.st_mtime
||
249 (config_time
.set
&& cache_stat
.st_mtime
< config_time
.time
))
253 FcStrSetAdd (staleDirs
, FcStrCopy ((FcChar8
*)name_buf
));
254 read (cache
->fd
, &md
, sizeof (FcCache
));
255 lseek (cache
->fd
, FcCacheNextOffset (lseek(cache
->fd
, 0, SEEK_CUR
)) + md
.count
, SEEK_SET
);
259 d
= malloc (sizeof (FcGlobalCacheDir
));
263 d
->next
= cache
->dirs
;
266 d
->name
= (char *)FcStrCopy ((FcChar8
*)name_buf
);
268 d
->offset
= lseek (cache
->fd
, 0, SEEK_CUR
);
270 d
->subdirs
= FcStrSetCreate();
271 while (strlen(FcCacheReadString (cache
->fd
, subdirName
, sizeof (subdirName
))) > 0)
272 FcStrSetAdd (d
->subdirs
, (FcChar8
*)subdirName
);
274 if (read (cache
->fd
, &d
->metadata
, sizeof (FcCache
)) != sizeof (FcCache
))
276 targ
= FcCacheNextOffset (lseek(cache
->fd
, 0, SEEK_CUR
)) + d
->metadata
.count
;
277 if (lseek (cache
->fd
, targ
, SEEK_SET
) != targ
)
283 for (d
= cache
->dirs
; d
; d
= next
)
298 if (stat ((char *) cache_file
, &cache_stat
) == 0)
299 unlink ((char *)cache_file
);
306 FcGlobalCacheReadDir (FcFontSet
*set
, FcStrSet
*dirs
, FcGlobalCache
* cache
, const char *dir
, FcConfig
*config
)
309 FcBool ret
= FcFalse
;
314 if (!(dir
= (char *)FcConfigNormalizeFontDir (config
, (FcChar8
*)dir
)))
315 return FcFalse
; /* non-existing directory */
317 for (d
= cache
->dirs
; d
; d
= d
->next
)
319 if (strncmp (d
->name
, dir
, strlen(dir
)) == 0)
321 lseek (cache
->fd
, d
->offset
, SEEK_SET
);
322 if (!FcDirCacheConsume (cache
->fd
, d
->name
, set
, config
))
324 if (strcmp (d
->name
, dir
) == 0)
333 FcGlobalCacheUpdate (FcGlobalCache
*cache
,
342 name
= (char *)FcConfigNormalizeFontDir (config
, (FcChar8
*)name
);
343 for (d
= cache
->dirs
; d
; d
= d
->next
)
345 if (strcmp(d
->name
, name
) == 0)
351 d
= malloc (sizeof (FcGlobalCacheDir
));
354 d
->next
= cache
->dirs
;
358 cache
->updated
= FcTrue
;
360 d
->name
= (char *)FcStrCopy ((FcChar8
*)name
);
361 d
->ent
= FcDirCacheProduce (set
, &d
->metadata
);
363 d
->subdirs
= FcStrSetCreate();
364 for (i
= 0; i
< dirs
->num
; i
++)
365 FcStrSetAdd (d
->subdirs
, dirs
->strs
[i
]);
370 FcGlobalCacheSave (FcGlobalCache
*cache
,
371 const FcChar8
*cache_file
,
375 FcGlobalCacheDir
*dir
;
377 off_t current_arch_start
= 0, truncate_to
;
378 char * current_arch_machine_name
, * header
;
383 #if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
384 /* Set-UID programs can't safely update the cache */
385 if (getuid () != geteuid ())
389 atomic
= FcAtomicCreate (cache_file
);
393 if (!FcAtomicLock (atomic
))
395 fd
= open ((char *) FcAtomicNewFile(atomic
), O_RDWR
| O_CREAT
,
399 FcCacheWriteString (fd
, FC_GLOBAL_MAGIC_COOKIE
);
401 fd_orig
= open ((char *) FcAtomicOrigFile(atomic
), O_RDONLY
);
403 current_arch_machine_name
= FcCacheMachineSignature ();
405 current_arch_start
= 0;
407 current_arch_start
= FcCacheSkipToArch (fd_orig
,
408 current_arch_machine_name
);
410 if (current_arch_start
< 0)
412 off_t i
= lseek(fd_orig
, 0, SEEK_END
);
413 if (i
< strlen (FC_GLOBAL_MAGIC_COOKIE
)+1)
414 i
= strlen (FC_GLOBAL_MAGIC_COOKIE
)+1;
415 current_arch_start
= FcCacheNextOffset (i
);
418 if (!FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
424 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
425 if (ftruncate (fd
, current_arch_start
) == -1)
428 header
= malloc (10 + strlen (current_arch_machine_name
));
432 truncate_to
= current_arch_start
+ strlen(current_arch_machine_name
) + 11;
433 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
435 truncate_to
+= strlen(dir
->name
) + 1;
436 truncate_to
+= sizeof (FcCache
);
437 truncate_to
= FcCacheNextOffset (truncate_to
);
438 truncate_to
+= dir
->metadata
.count
;
440 for (i
= 0; i
< dir
->subdirs
->size
; i
++)
441 truncate_to
+= strlen((char *)dir
->subdirs
->strs
[i
]) + 1;
444 truncate_to
-= current_arch_start
;
446 sprintf (header
, "%8x ", (int)truncate_to
);
447 strcat (header
, current_arch_machine_name
);
448 if (!FcCacheWriteString (fd
, header
))
451 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
455 const char * d
= (const char *)FcConfigNormalizeFontDir (config
, (const FcChar8
*)dir
->name
);
457 FcCacheWriteString (fd
, d
);
459 for (i
= 0; i
< dir
->subdirs
->size
; i
++)
460 FcCacheWriteString (fd
, (char *)dir
->subdirs
->strs
[i
]);
461 FcCacheWriteString (fd
, "");
463 write (fd
, &dir
->metadata
, sizeof(FcCache
));
464 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
)), SEEK_SET
);
465 write (fd
, dir
->ent
, dir
->metadata
.count
);
469 FcCacheWriteString (fd
, "");
471 if (close (fd
) == -1)
474 if (!FcAtomicReplaceOrig (atomic
))
477 FcAtomicUnlock (atomic
);
478 FcAtomicDestroy (atomic
);
480 cache
->updated
= FcFalse
;
491 FcAtomicDeleteNew (atomic
);
493 FcAtomicUnlock (atomic
);
495 FcAtomicDestroy (atomic
);
500 * Find the next presumably-mmapable offset after the supplied file
504 FcCacheNextOffset(off_t w
)
506 static long pagesize
= -1;
508 pagesize
= sysconf(_SC_PAGESIZE
);
509 if (w
% pagesize
== 0)
512 return ((w
/ pagesize
)+1)*pagesize
;
515 /* return the address of the segment for the provided arch,
516 * or -1 if arch not found */
518 FcCacheSkipToArch (int fd
, const char * arch
)
520 char candidate_arch_machine_name_count
[MACHINE_SIGNATURE_SIZE
+ 9];
521 char * candidate_arch
;
522 off_t current_arch_start
= 0;
524 lseek (fd
, 0, SEEK_SET
);
525 FcCacheSkipString (fd
);
526 current_arch_start
= lseek (fd
, 0, SEEK_CUR
);
528 /* skip arches that are not the current arch */
533 if (lseek (fd
, current_arch_start
, SEEK_SET
) != current_arch_start
)
536 if (FcCacheReadString (fd
, candidate_arch_machine_name_count
,
537 sizeof (candidate_arch_machine_name_count
)) == 0)
539 if (!strlen(candidate_arch_machine_name_count
))
541 bs
= strtol(candidate_arch_machine_name_count
, &candidate_arch
, 16);
543 // count = 0 should probably be distinguished from the !bs condition
544 if (!bs
|| bs
< strlen (candidate_arch_machine_name_count
))
547 candidate_arch
++; /* skip leading space */
549 if (strcmp (candidate_arch
, arch
)==0)
550 return current_arch_start
;
551 current_arch_start
+= bs
;
557 /* Cuts out the segment at the file pointer (moves everything else
558 * down to cover it), and leaves the file pointer at the end of the
561 FcCacheCopyOld (int fd
, int fd_orig
, off_t start
)
563 char * buf
= malloc (8192);
564 char candidate_arch_machine_name
[MACHINE_SIGNATURE_SIZE
+ 9];
566 int c
, bytes_skipped
;
573 lseek (fd
, 0, SEEK_SET
); lseek (fd_orig
, 0, SEEK_SET
);
580 if ((c
= read (fd_orig
, buf
, b
)) <= 0)
582 if (write (fd
, buf
, c
) < 0)
589 lseek (fd
, start
, SEEK_SET
);
590 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
591 sizeof (candidate_arch_machine_name
)) == 0)
593 if (!strlen(candidate_arch_machine_name
))
596 bs
= strtol(candidate_arch_machine_name
, 0, 16);
603 lseek (fd
, start
+bs
+bytes_skipped
, SEEK_SET
);
604 if ((c
= read (fd
, buf
, 8192)) <= 0)
606 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
607 if (write (fd
, buf
, c
) < 0)
612 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
623 /* Does not check that the cache has the appropriate arch section. */
624 /* Also, this can be fooled if the original location has a stale
625 * cache, and the hashed location has an up-to-date cache. Oh well,
626 * sucks to be you in that case! */
628 FcDirCacheValid (const FcChar8
*dir
)
630 struct stat file_stat
, dir_stat
;
633 if (stat ((char *) dir
, &dir_stat
) < 0)
636 fd
= FcDirCacheOpen (dir
);
640 if (fstat (fd
, &file_stat
) < 0)
646 * If the directory has been modified more recently than
647 * the cache file, the cache is not valid
649 if (dir_stat
.st_mtime
> file_stat
.st_mtime
)
659 /* Assumes that the cache file in 'dir' exists.
660 * Checks that the cache has the appropriate arch section. */
662 FcDirCacheHasCurrentArch (const FcChar8
*dir
)
665 off_t current_arch_start
;
666 char *current_arch_machine_name
;
668 fd
= FcDirCacheOpen (dir
);
672 current_arch_machine_name
= FcCacheMachineSignature();
673 current_arch_start
= FcCacheSkipToArch(fd
, current_arch_machine_name
);
676 if (current_arch_start
< 0)
686 FcDirCacheUnlink (const FcChar8
*dir
, FcConfig
*config
)
689 char *cache_hashed
= 0;
691 struct stat cache_stat
;
692 char name_buf
[FC_MAX_FILE_LEN
];
694 dir
= FcConfigNormalizeFontDir (config
, dir
);
695 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
699 /* First remove normal cache file. */
700 if (stat ((char *) cache_file
, &cache_stat
) == 0 &&
701 unlink ((char *)cache_file
) != 0)
704 /* Next remove any applicable hashed files. */
705 fd
= -1; collisions
= 0;
709 FcStrFree ((FcChar8
*)cache_hashed
);
711 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
717 fd
= open(cache_hashed
, O_RDONLY
);
720 FcStrFree ((FcChar8
*)cache_file
);
724 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
725 if (!strlen(name_buf
))
727 FcStrFree ((FcChar8
*)cache_hashed
);
730 } while (strcmp (name_buf
, cache_file
) != 0);
732 FcStrFree ((FcChar8
*)cache_file
);
735 if (stat ((char *) cache_hashed
, &cache_stat
) == 0 &&
736 unlink ((char *)cache_hashed
) != 0)
738 FcStrFree ((FcChar8
*)cache_hashed
);
742 FcStrFree ((FcChar8
*)cache_hashed
);
746 FcStrFree ((FcChar8
*)cache_file
);
751 FcCacheReadDirs (FcConfig
* config
, FcGlobalCache
* cache
,
752 FcStrList
*list
, FcFontSet
* set
)
756 FcChar8
*file
, *base
;
762 * Read in the results from 'list'.
764 while ((dir
= FcStrListNext (list
)))
766 if (!FcConfigAcceptFilename (config
, dir
))
770 file
= (FcChar8
*) malloc (strlen ((char *) dir
) + 1 + FC_MAX_FILE_LEN
+ 1);
774 strcpy ((char *) file
, (char *) dir
);
775 strcat ((char *) file
, "/");
776 base
= file
+ strlen ((char *) file
);
778 subdirs
= FcStrSetCreate ();
781 fprintf (stderr
, "Can't create directory set\n");
787 if (access ((char *) dir
, X_OK
) < 0)
795 fprintf (stderr
, "\"%s\": ", dir
);
799 FcStrSetDestroy (subdirs
);
803 if (stat ((char *) dir
, &statb
) == -1)
805 fprintf (stderr
, "\"%s\": ", dir
);
807 FcStrSetDestroy (subdirs
);
812 if (!S_ISDIR (statb
.st_mode
))
814 fprintf (stderr
, "\"%s\": not a directory, skipping\n", dir
);
815 FcStrSetDestroy (subdirs
);
819 if (!FcDirCacheValid (dir
) || !FcDirCacheRead (set
, subdirs
, dir
, config
))
821 if (FcDebug () & FC_DBG_FONTSET
)
822 printf ("cache scan dir %s\n", dir
);
824 FcDirScanConfig (set
, subdirs
, cache
,
825 config
->blanks
, dir
, FcFalse
, config
);
827 sublist
= FcStrListCreate (subdirs
);
828 FcStrSetDestroy (subdirs
);
831 fprintf (stderr
, "Can't create subdir list in \"%s\"\n", dir
);
836 ret
+= FcCacheReadDirs (config
, cache
, sublist
, set
);
839 FcStrListDone (list
);
844 FcCacheRead (FcConfig
*config
, FcGlobalCache
* cache
)
846 FcFontSet
* s
= FcFontSetCreate();
850 if (FcCacheReadDirs (config
, cache
, FcConfigGetConfigDirs (config
), s
))
856 FcFontSetDestroy (s
);
860 static const char bin2hex
[] = { '0', '1', '2', '3',
863 'c', 'd', 'e', 'f' };
866 FcDirCacheHashName (char * cache_file
, int collisions
)
868 unsigned char hash
[16], hex_hash
[33];
870 unsigned char uscore
= '_';
873 struct MD5Context ctx
;
876 MD5Update (&ctx
, (unsigned char *)cache_file
, strlen (cache_file
));
878 for (i
= 0; i
< collisions
; i
++)
879 MD5Update (&ctx
, &uscore
, 1);
881 MD5Final (hash
, &ctx
);
883 for (cnt
= 0; cnt
< 16; ++cnt
)
885 hex_hash
[2*cnt
] = bin2hex
[hash
[cnt
] >> 4];
886 hex_hash
[2*cnt
+1] = bin2hex
[hash
[cnt
] & 0xf];
890 tmp
= FcStrPlus ((FcChar8
*)hex_hash
, (FcChar8
*)FC_CACHE_SUFFIX
);
894 cache_hashed
= (char *)FcStrPlus ((FcChar8
*)PKGCACHEDIR
"/", tmp
);
900 /* Opens the hashed name for cache_file.
901 * This would fail in the unlikely event of a collision and subsequent
902 * removal of the file which originally caused the collision. */
904 FcDirCacheOpen (const FcChar8
*dir
)
907 int fd
= -1, collisions
= 0;
908 char *cache_file
, *cache_hashed
;
909 char name_buf
[FC_MAX_FILE_LEN
];
910 struct stat dir_stat
;
912 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
916 fd
= open(cache_file
, O_RDONLY
);
920 if (stat ((char *)dir
, &dir_stat
) == -1)
927 FcChar8
* name_buf_dir
;
929 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
932 FcStrFree ((FcChar8
*)cache_file
);
938 fd
= open(cache_hashed
, O_RDONLY
);
939 FcStrFree ((FcChar8
*)cache_hashed
);
943 FcStrFree ((FcChar8
*)cache_file
);
946 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
947 if (!strlen(name_buf
))
950 name_buf_dir
= FcStrDirname ((FcChar8
*)name_buf
);
951 if (stat ((char *)name_buf_dir
, &c
) == -1)
953 FcStrFree (name_buf_dir
);
956 FcStrFree (name_buf_dir
);
957 found
= (c
.st_ino
== dir_stat
.st_ino
) && (c
.st_dev
== dir_stat
.st_dev
);
959 FcStrFree ((FcChar8
*)cache_file
);
963 FcStrFree ((FcChar8
*)cache_file
);
968 /* read serialized state from the cache file */
970 FcDirCacheRead (FcFontSet
* set
, FcStrSet
* dirs
, const FcChar8
*dir
, FcConfig
*config
)
973 char *current_arch_machine_name
;
974 char candidate_arch_machine_name
[9+MACHINE_SIGNATURE_SIZE
];
975 off_t current_arch_start
= 0;
976 char subdirName
[FC_MAX_FILE_LEN
+ 1 + 12 + 1];
978 fd
= FcDirCacheOpen (dir
);
982 current_arch_machine_name
= FcCacheMachineSignature();
983 current_arch_start
= FcCacheSkipToArch(fd
,
984 current_arch_machine_name
);
985 if (current_arch_start
< 0)
988 lseek (fd
, current_arch_start
, SEEK_SET
);
989 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
990 sizeof (candidate_arch_machine_name
)) == 0)
993 while (strlen(FcCacheReadString (fd
, subdirName
, sizeof (subdirName
))) > 0)
994 FcStrSetAdd (dirs
, (FcChar8
*)subdirName
);
996 if (!FcDirCacheConsume (fd
, (const char *)dir
, set
, config
))
1009 FcDirCacheConsume (int fd
, const char * dir
, FcFontSet
*set
, FcConfig
*config
)
1012 void * current_dir_block
;
1015 read(fd
, &metadata
, sizeof(FcCache
));
1016 if (metadata
.magic
!= FC_CACHE_MAGIC
)
1019 if (!metadata
.count
)
1021 pos
= FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
));
1022 lseek (fd
, pos
, SEEK_SET
);
1024 FcConfigAddFontDir (config
, (FcChar8
*)dir
);
1028 pos
= FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
));
1029 current_dir_block
= mmap (0, metadata
.count
,
1030 PROT_READ
, MAP_SHARED
, fd
, pos
);
1031 lseek (fd
, pos
+metadata
.count
, SEEK_SET
);
1032 if (current_dir_block
== MAP_FAILED
)
1035 FcCacheAddBankDir (metadata
.bank
, dir
);
1037 FcConfigAddFontDir (config
, (FcChar8
*)dir
);
1039 if (!FcFontSetUnserialize (&metadata
, set
, current_dir_block
))
1046 FcDirCacheProduce (FcFontSet
*set
, FcCache
*metadata
)
1048 void * current_dir_block
, * final_dir_block
;
1049 static unsigned int rand_state
= 0;
1050 int bank
, needed_bytes_no_align
;
1053 rand_state
= time(0L);
1054 bank
= rand_r(&rand_state
);
1056 while (FcCacheHaveBank(bank
))
1057 bank
= rand_r(&rand_state
);
1059 memset (metadata
, 0, sizeof(FcCache
));
1061 needed_bytes_no_align
= FcFontSetNeededBytes (set
);
1062 metadata
->count
= needed_bytes_no_align
+
1063 FcFontSetNeededBytesAlign ();
1064 metadata
->magic
= FC_CACHE_MAGIC
;
1065 metadata
->bank
= bank
;
1067 if (!needed_bytes_no_align
) /* not a failure, no fonts to write */
1069 /* no, you don't really need to write any bytes at all. */
1070 metadata
->count
= 0;
1074 current_dir_block
= malloc (metadata
->count
);
1075 if (!current_dir_block
)
1078 memset (current_dir_block
, 0, metadata
->count
);
1079 final_dir_block
= FcFontSetDistributeBytes (metadata
, current_dir_block
);
1081 if ((void *)((char *)current_dir_block
+metadata
->count
) < final_dir_block
)
1084 if (!FcFontSetSerialize (bank
, set
))
1087 return current_dir_block
;
1090 free (current_dir_block
);
1094 /* write serialized state to the cache file */
1096 FcDirCacheWrite (FcFontSet
*set
, FcStrSet
*dirs
, const FcChar8
*dir
)
1100 int fd
, fd_orig
, i
, dirs_count
;
1103 off_t current_arch_start
= 0, truncate_to
;
1104 char name_buf
[FC_MAX_FILE_LEN
];
1107 char *current_arch_machine_name
, * header
;
1108 void *current_dir_block
= 0;
1110 dir
= FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir
);
1114 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
1118 /* Ensure that we're not trampling a cache for some other dir. */
1119 /* This is slightly different from FcDirCacheOpen, since it
1120 * needs the filename, not the file descriptor. */
1121 fd
= -1; collisions
= 0;
1124 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
1130 fd
= open(cache_hashed
, O_RDONLY
);
1133 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
1136 if (!strlen(name_buf
))
1139 if (strcmp (name_buf
, cache_file
) != 0)
1143 current_dir_block
= FcDirCacheProduce (set
, &metadata
);
1145 if (metadata
.count
&& !current_dir_block
)
1148 if (FcDebug () & FC_DBG_CACHE
)
1149 printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file
);
1151 atomic
= FcAtomicCreate ((FcChar8
*)cache_hashed
);
1155 if (!FcAtomicLock (atomic
))
1157 /* Now try rewriting the original version of the file. */
1158 FcAtomicDestroy (atomic
);
1160 atomic
= FcAtomicCreate ((FcChar8
*)cache_file
);
1161 fd_orig
= open (cache_file
, O_RDONLY
);
1163 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1165 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1170 /* In all cases, try opening the real location of the cache file first. */
1171 /* (even if that's not atomic.) */
1172 fd_orig
= open (cache_file
, O_RDONLY
);
1174 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1176 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1180 FcCacheWriteString (fd
, cache_file
);
1182 current_arch_machine_name
= FcCacheMachineSignature ();
1183 current_arch_start
= 0;
1186 current_arch_start
=
1187 FcCacheSkipToArch(fd_orig
, current_arch_machine_name
);
1189 if (current_arch_start
< 0)
1191 off_t i
= lseek(fd_orig
, 0, SEEK_END
);
1192 if (i
< strlen (FC_GLOBAL_MAGIC_COOKIE
)+1)
1193 i
= strlen (FC_GLOBAL_MAGIC_COOKIE
)+1;
1194 current_arch_start
= FcCacheNextOffset (i
);
1197 if (fd_orig
!= -1 && !FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
1203 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
1204 if (ftruncate (fd
, current_arch_start
) == -1)
1207 /* allocate space for subdir names in this block */
1209 for (i
= 0; i
< dirs
->size
; i
++)
1210 dirs_count
+= strlen((char *)dirs
->strs
[i
]) + 1;
1213 /* now write the address of the next offset */
1214 truncate_to
= FcCacheNextOffset (FcCacheNextOffset (current_arch_start
+ sizeof (FcCache
) + dirs_count
) + metadata
.count
) - current_arch_start
;
1215 header
= malloc (10 + strlen (current_arch_machine_name
));
1218 sprintf (header
, "%8x ", (int)truncate_to
);
1219 strcat (header
, current_arch_machine_name
);
1220 if (!FcCacheWriteString (fd
, header
))
1223 for (i
= 0; i
< dirs
->size
; i
++)
1224 FcCacheWriteString (fd
, (char *)dirs
->strs
[i
]);
1225 FcCacheWriteString (fd
, "");
1227 write (fd
, &metadata
, sizeof(FcCache
));
1230 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_END
)), SEEK_SET
);
1231 write (fd
, current_dir_block
, metadata
.count
);
1232 free (current_dir_block
);
1235 /* this actually serves to pad out the cache file, if needed */
1236 if (ftruncate (fd
, current_arch_start
+ truncate_to
) == -1)
1241 if (!FcAtomicReplaceOrig(atomic
))
1243 FcStrFree ((FcChar8
*)cache_hashed
);
1244 FcStrFree ((FcChar8
*)cache_file
);
1245 FcAtomicUnlock (atomic
);
1246 FcAtomicDestroy (atomic
);
1254 FcAtomicUnlock (atomic
);
1256 FcAtomicDestroy (atomic
);
1258 FcStrFree ((FcChar8
*)cache_hashed
);
1260 unlink ((char *)cache_file
);
1261 FcStrFree ((FcChar8
*)cache_file
);
1262 if (current_dir_block
)
1263 free (current_dir_block
);
1269 FcCacheMachineSignature ()
1271 static char buf
[MACHINE_SIGNATURE_SIZE
];
1272 int32_t magic
= ENDIAN_TEST
;
1273 char * m
= (char *)&magic
;
1275 sprintf (buf
, "%2x%2x%2x%2x "
1276 "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
1277 "%4x %4x %4x %4x %4x %4x %4x %4x\n",
1278 m
[0], m
[1], m
[2], m
[3],
1279 (unsigned int)sizeof (char),
1280 (unsigned int)sizeof (char *),
1281 (unsigned int)sizeof (int),
1282 (unsigned int)sizeof (FcPattern
),
1283 (unsigned int)sizeof (FcPatternEltPtr
),
1284 (unsigned int)sizeof (struct _FcPatternElt
*),
1285 (unsigned int)sizeof (FcPatternElt
),
1286 (unsigned int)sizeof (FcObjectPtr
),
1287 (unsigned int)sizeof (FcValueListPtr
),
1288 (unsigned int)sizeof (FcValue
),
1289 (unsigned int)sizeof (FcValueBinding
),
1290 (unsigned int)sizeof (struct _FcValueList
*),
1291 (unsigned int)sizeof (FcCharSet
),
1292 (unsigned int)sizeof (FcCharLeaf
**),
1293 (unsigned int)sizeof (FcChar16
*),
1294 (unsigned int)sizeof (FcChar16
),
1295 (unsigned int)sizeof (FcCharLeaf
),
1296 (unsigned int)sizeof (FcChar32
),
1297 (unsigned int)sizeof (FcCache
),
1298 (unsigned int)sysconf(_SC_PAGESIZE
));
1303 static int banks_ptr
= 0, banks_alloc
= 0;
1304 int * _fcBankId
= 0, * _fcBankIdx
= 0;
1305 static const char ** bankDirs
= 0;
1308 FcCacheHaveBank (int bank
)
1312 if (bank
< FC_BANK_FIRST
)
1315 for (i
= 0; i
< banks_ptr
; i
++)
1316 if (_fcBankId
[i
] == bank
)
1323 FcCacheBankToIndexMTF (int bank
)
1327 for (i
= 0; i
< banks_ptr
; i
++)
1328 if (_fcBankId
[_fcBankIdx
[i
]] == bank
)
1330 int t
= _fcBankIdx
[i
];
1332 for (j
= i
; j
> 0; j
--)
1333 _fcBankIdx
[j
] = _fcBankIdx
[j
-1];
1338 if (banks_ptr
>= banks_alloc
)
1343 b
= realloc (_fcBankId
, (banks_alloc
+ 4) * sizeof(int));
1348 bidx
= realloc (_fcBankIdx
, (banks_alloc
+ 4) * sizeof(int));
1353 bds
= realloc (bankDirs
, (banks_alloc
+ 4) * sizeof (char *));
1362 _fcBankId
[i
] = bank
;
1368 FcCacheAddBankDir (int bank
, const char * dir
)
1370 int bi
= FcCacheBankToIndexMTF (bank
);
1375 bankDirs
[bi
] = (const char *)FcStrCopy ((FcChar8
*)dir
);
1379 FcCacheFindBankDir (int bank
)
1381 int bi
= FcCacheBankToIndex (bank
);
1382 return bankDirs
[bi
];
1386 * This code implements the MD5 message-digest algorithm.
1387 * The algorithm is due to Ron Rivest. This code was
1388 * written by Colin Plumb in 1993, no copyright is claimed.
1389 * This code is in the public domain; do with it what you wish.
1391 * Equivalent code is available from RSA Data Security, Inc.
1392 * This code has been tested against that, and is equivalent,
1393 * except that you don't need to include two pages of legalese
1396 * To compute the message digest of a chunk of bytes, declare an
1397 * MD5Context structure, pass it to MD5Init, call MD5Update as
1398 * needed on buffers full of bytes, and then call MD5Final, which
1399 * will fill a supplied 16-byte array with the digest.
1403 #define byteReverse(buf, len) /* Nothing */
1406 * Note: this code is harmless on little-endian machines.
1408 void byteReverse(unsigned char *buf
, unsigned longs
)
1412 t
= (FcChar32
) ((unsigned) buf
[3] << 8 | buf
[2]) << 16 |
1413 ((unsigned) buf
[1] << 8 | buf
[0]);
1414 *(FcChar32
*) buf
= t
;
1421 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
1422 * initialization constants.
1424 static void MD5Init(struct MD5Context
*ctx
)
1426 ctx
->buf
[0] = 0x67452301;
1427 ctx
->buf
[1] = 0xefcdab89;
1428 ctx
->buf
[2] = 0x98badcfe;
1429 ctx
->buf
[3] = 0x10325476;
1436 * Update context to reflect the concatenation of another buffer full
1439 static void MD5Update(struct MD5Context
*ctx
, unsigned char *buf
, unsigned len
)
1443 /* Update bitcount */
1446 if ((ctx
->bits
[0] = t
+ ((FcChar32
) len
<< 3)) < t
)
1447 ctx
->bits
[1]++; /* Carry from low to high */
1448 ctx
->bits
[1] += len
>> 29;
1450 t
= (t
>> 3) & 0x3f; /* Bytes already in shsInfo->data */
1452 /* Handle any leading odd-sized chunks */
1455 unsigned char *p
= (unsigned char *) ctx
->in
+ t
;
1459 memcpy(p
, buf
, len
);
1463 byteReverse(ctx
->in
, 16);
1464 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1468 /* Process data in 64-byte chunks */
1471 memcpy(ctx
->in
, buf
, 64);
1472 byteReverse(ctx
->in
, 16);
1473 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1478 /* Handle any remaining bytes of data. */
1480 memcpy(ctx
->in
, buf
, len
);
1484 * Final wrapup - pad to 64-byte boundary with the bit pattern
1485 * 1 0* (64-bit count of bits processed, MSB-first)
1487 static void MD5Final(unsigned char digest
[16], struct MD5Context
*ctx
)
1492 /* Compute number of bytes mod 64 */
1493 count
= (ctx
->bits
[0] >> 3) & 0x3F;
1495 /* Set the first char of padding to 0x80. This is safe since there is
1496 always at least one byte free */
1497 p
= ctx
->in
+ count
;
1500 /* Bytes of padding needed to make 64 bytes */
1501 count
= 64 - 1 - count
;
1503 /* Pad out to 56 mod 64 */
1505 /* Two lots of padding: Pad the first block to 64 bytes */
1506 memset(p
, 0, count
);
1507 byteReverse(ctx
->in
, 16);
1508 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1510 /* Now fill the next block with 56 bytes */
1511 memset(ctx
->in
, 0, 56);
1513 /* Pad block to 56 bytes */
1514 memset(p
, 0, count
- 8);
1516 byteReverse(ctx
->in
, 14);
1518 /* Append length in bits and transform */
1519 ((FcChar32
*) ctx
->in
)[14] = ctx
->bits
[0];
1520 ((FcChar32
*) ctx
->in
)[15] = ctx
->bits
[1];
1522 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1523 byteReverse((unsigned char *) ctx
->buf
, 4);
1524 memcpy(digest
, ctx
->buf
, 16);
1525 memset(ctx
, 0, sizeof(ctx
)); /* In case it's sensitive */
1529 /* The four core functions - F1 is optimized somewhat */
1531 /* #define F1(x, y, z) (x & y | ~x & z) */
1532 #define F1(x, y, z) (z ^ (x & (y ^ z)))
1533 #define F2(x, y, z) F1(z, x, y)
1534 #define F3(x, y, z) (x ^ y ^ z)
1535 #define F4(x, y, z) (y ^ (x | ~z))
1537 /* This is the central step in the MD5 algorithm. */
1538 #define MD5STEP(f, w, x, y, z, data, s) \
1539 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
1542 * The core of the MD5 algorithm, this alters an existing MD5 hash to
1543 * reflect the addition of 16 longwords of new data. MD5Update blocks
1544 * the data and converts bytes into longwords for this routine.
1546 static void MD5Transform(FcChar32 buf
[4], FcChar32 in
[16])
1548 register FcChar32 a
, b
, c
, d
;
1555 MD5STEP(F1
, a
, b
, c
, d
, in
[0] + 0xd76aa478, 7);
1556 MD5STEP(F1
, d
, a
, b
, c
, in
[1] + 0xe8c7b756, 12);
1557 MD5STEP(F1
, c
, d
, a
, b
, in
[2] + 0x242070db, 17);
1558 MD5STEP(F1
, b
, c
, d
, a
, in
[3] + 0xc1bdceee, 22);
1559 MD5STEP(F1
, a
, b
, c
, d
, in
[4] + 0xf57c0faf, 7);
1560 MD5STEP(F1
, d
, a
, b
, c
, in
[5] + 0x4787c62a, 12);
1561 MD5STEP(F1
, c
, d
, a
, b
, in
[6] + 0xa8304613, 17);
1562 MD5STEP(F1
, b
, c
, d
, a
, in
[7] + 0xfd469501, 22);
1563 MD5STEP(F1
, a
, b
, c
, d
, in
[8] + 0x698098d8, 7);
1564 MD5STEP(F1
, d
, a
, b
, c
, in
[9] + 0x8b44f7af, 12);
1565 MD5STEP(F1
, c
, d
, a
, b
, in
[10] + 0xffff5bb1, 17);
1566 MD5STEP(F1
, b
, c
, d
, a
, in
[11] + 0x895cd7be, 22);
1567 MD5STEP(F1
, a
, b
, c
, d
, in
[12] + 0x6b901122, 7);
1568 MD5STEP(F1
, d
, a
, b
, c
, in
[13] + 0xfd987193, 12);
1569 MD5STEP(F1
, c
, d
, a
, b
, in
[14] + 0xa679438e, 17);
1570 MD5STEP(F1
, b
, c
, d
, a
, in
[15] + 0x49b40821, 22);
1572 MD5STEP(F2
, a
, b
, c
, d
, in
[1] + 0xf61e2562, 5);
1573 MD5STEP(F2
, d
, a
, b
, c
, in
[6] + 0xc040b340, 9);
1574 MD5STEP(F2
, c
, d
, a
, b
, in
[11] + 0x265e5a51, 14);
1575 MD5STEP(F2
, b
, c
, d
, a
, in
[0] + 0xe9b6c7aa, 20);
1576 MD5STEP(F2
, a
, b
, c
, d
, in
[5] + 0xd62f105d, 5);
1577 MD5STEP(F2
, d
, a
, b
, c
, in
[10] + 0x02441453, 9);
1578 MD5STEP(F2
, c
, d
, a
, b
, in
[15] + 0xd8a1e681, 14);
1579 MD5STEP(F2
, b
, c
, d
, a
, in
[4] + 0xe7d3fbc8, 20);
1580 MD5STEP(F2
, a
, b
, c
, d
, in
[9] + 0x21e1cde6, 5);
1581 MD5STEP(F2
, d
, a
, b
, c
, in
[14] + 0xc33707d6, 9);
1582 MD5STEP(F2
, c
, d
, a
, b
, in
[3] + 0xf4d50d87, 14);
1583 MD5STEP(F2
, b
, c
, d
, a
, in
[8] + 0x455a14ed, 20);
1584 MD5STEP(F2
, a
, b
, c
, d
, in
[13] + 0xa9e3e905, 5);
1585 MD5STEP(F2
, d
, a
, b
, c
, in
[2] + 0xfcefa3f8, 9);
1586 MD5STEP(F2
, c
, d
, a
, b
, in
[7] + 0x676f02d9, 14);
1587 MD5STEP(F2
, b
, c
, d
, a
, in
[12] + 0x8d2a4c8a, 20);
1589 MD5STEP(F3
, a
, b
, c
, d
, in
[5] + 0xfffa3942, 4);
1590 MD5STEP(F3
, d
, a
, b
, c
, in
[8] + 0x8771f681, 11);
1591 MD5STEP(F3
, c
, d
, a
, b
, in
[11] + 0x6d9d6122, 16);
1592 MD5STEP(F3
, b
, c
, d
, a
, in
[14] + 0xfde5380c, 23);
1593 MD5STEP(F3
, a
, b
, c
, d
, in
[1] + 0xa4beea44, 4);
1594 MD5STEP(F3
, d
, a
, b
, c
, in
[4] + 0x4bdecfa9, 11);
1595 MD5STEP(F3
, c
, d
, a
, b
, in
[7] + 0xf6bb4b60, 16);
1596 MD5STEP(F3
, b
, c
, d
, a
, in
[10] + 0xbebfbc70, 23);
1597 MD5STEP(F3
, a
, b
, c
, d
, in
[13] + 0x289b7ec6, 4);
1598 MD5STEP(F3
, d
, a
, b
, c
, in
[0] + 0xeaa127fa, 11);
1599 MD5STEP(F3
, c
, d
, a
, b
, in
[3] + 0xd4ef3085, 16);
1600 MD5STEP(F3
, b
, c
, d
, a
, in
[6] + 0x04881d05, 23);
1601 MD5STEP(F3
, a
, b
, c
, d
, in
[9] + 0xd9d4d039, 4);
1602 MD5STEP(F3
, d
, a
, b
, c
, in
[12] + 0xe6db99e5, 11);
1603 MD5STEP(F3
, c
, d
, a
, b
, in
[15] + 0x1fa27cf8, 16);
1604 MD5STEP(F3
, b
, c
, d
, a
, in
[2] + 0xc4ac5665, 23);
1606 MD5STEP(F4
, a
, b
, c
, d
, in
[0] + 0xf4292244, 6);
1607 MD5STEP(F4
, d
, a
, b
, c
, in
[7] + 0x432aff97, 10);
1608 MD5STEP(F4
, c
, d
, a
, b
, in
[14] + 0xab9423a7, 15);
1609 MD5STEP(F4
, b
, c
, d
, a
, in
[5] + 0xfc93a039, 21);
1610 MD5STEP(F4
, a
, b
, c
, d
, in
[12] + 0x655b59c3, 6);
1611 MD5STEP(F4
, d
, a
, b
, c
, in
[3] + 0x8f0ccc92, 10);
1612 MD5STEP(F4
, c
, d
, a
, b
, in
[10] + 0xffeff47d, 15);
1613 MD5STEP(F4
, b
, c
, d
, a
, in
[1] + 0x85845dd1, 21);
1614 MD5STEP(F4
, a
, b
, c
, d
, in
[8] + 0x6fa87e4f, 6);
1615 MD5STEP(F4
, d
, a
, b
, c
, in
[15] + 0xfe2ce6e0, 10);
1616 MD5STEP(F4
, c
, d
, a
, b
, in
[6] + 0xa3014314, 15);
1617 MD5STEP(F4
, b
, c
, d
, a
, in
[13] + 0x4e0811a1, 21);
1618 MD5STEP(F4
, a
, b
, c
, d
, in
[4] + 0xf7537e82, 6);
1619 MD5STEP(F4
, d
, a
, b
, c
, in
[11] + 0xbd3af235, 10);
1620 MD5STEP(F4
, c
, d
, a
, b
, in
[2] + 0x2ad7d2bb, 15);
1621 MD5STEP(F4
, b
, c
, d
, a
, in
[9] + 0xeb86d391, 21);