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 dir
= (char *)FcConfigNormalizeFontDir (config
, (FcChar8
*)dir
);
308 for (d
= cache
->dirs
; d
; d
= d
->next
)
310 if (strncmp (d
->name
, dir
, strlen(dir
)) == 0)
312 lseek (cache
->fd
, d
->offset
, SEEK_SET
);
313 if (!FcDirCacheConsume (cache
->fd
, dir
, set
, config
))
315 if (strcmp (d
->name
, dir
) == 0)
324 FcGlobalCacheUpdate (FcGlobalCache
*cache
,
329 FcGlobalCacheDir
* d
;
331 name
= (char *)FcConfigNormalizeFontDir (config
, (FcChar8
*)name
);
332 for (d
= cache
->dirs
; d
; d
= d
->next
)
334 if (strcmp(d
->name
, name
) == 0)
340 d
= malloc (sizeof (FcGlobalCacheDir
));
343 d
->next
= cache
->dirs
;
347 cache
->updated
= FcTrue
;
349 d
->name
= (char *)FcStrCopy ((FcChar8
*)name
);
350 d
->ent
= FcDirCacheProduce (set
, &d
->metadata
);
356 FcGlobalCacheSave (FcGlobalCache
*cache
,
357 const FcChar8
*cache_file
,
361 FcGlobalCacheDir
*dir
;
363 off_t current_arch_start
= 0, truncate_to
;
364 char * current_arch_machine_name
, * header
;
369 #if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
370 /* Set-UID programs can't safely update the cache */
371 if (getuid () != geteuid ())
375 atomic
= FcAtomicCreate (cache_file
);
379 if (!FcAtomicLock (atomic
))
381 fd
= open ((char *) FcAtomicNewFile(atomic
), O_RDWR
| O_CREAT
,
386 fd_orig
= open ((char *) FcAtomicOrigFile(atomic
), O_RDONLY
);
388 current_arch_machine_name
= FcCacheMachineSignature ();
390 current_arch_start
= 0;
392 current_arch_start
= FcCacheSkipToArch (fd_orig
,
393 current_arch_machine_name
);
395 if (current_arch_start
< 0)
396 current_arch_start
= FcCacheNextOffset (lseek(fd_orig
, 0, SEEK_END
));
398 if (!FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
404 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
405 if (ftruncate (fd
, current_arch_start
) == -1)
408 header
= malloc (10 + strlen (current_arch_machine_name
));
412 truncate_to
= current_arch_start
+ strlen(current_arch_machine_name
) + 11;
413 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
415 truncate_to
+= strlen(dir
->name
) + 1;
416 truncate_to
+= sizeof (FcCache
);
417 truncate_to
= FcCacheNextOffset (truncate_to
);
418 truncate_to
+= dir
->metadata
.count
;
420 truncate_to
-= current_arch_start
;
422 FcCacheWriteString (fd
, FC_GLOBAL_MAGIC_COOKIE
);
423 sprintf (header
, "%8x ", (int)truncate_to
);
424 strcat (header
, current_arch_machine_name
);
425 if (!FcCacheWriteString (fd
, header
))
428 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
432 const char * d
= (const char *)FcConfigNormalizeFontDir (config
, (const FcChar8
*)dir
->name
);
434 FcCacheWriteString (fd
, d
);
435 write (fd
, &dir
->metadata
, sizeof(FcCache
));
436 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
)), SEEK_SET
);
437 write (fd
, dir
->ent
, dir
->metadata
.count
);
441 FcCacheWriteString (fd
, "");
443 if (close (fd
) == -1)
446 if (!FcAtomicReplaceOrig (atomic
))
449 FcAtomicUnlock (atomic
);
450 FcAtomicDestroy (atomic
);
452 cache
->updated
= FcFalse
;
463 FcAtomicDeleteNew (atomic
);
465 FcAtomicUnlock (atomic
);
467 FcAtomicDestroy (atomic
);
472 * Find the next presumably-mmapable offset after the supplied file
476 FcCacheNextOffset(off_t w
)
478 static long pagesize
= -1;
480 pagesize
= sysconf(_SC_PAGESIZE
);
481 if (w
% pagesize
== 0)
484 return ((w
/ pagesize
)+1)*pagesize
;
487 /* return the address of the segment for the provided arch,
488 * or -1 if arch not found */
490 FcCacheSkipToArch (int fd
, const char * arch
)
492 char candidate_arch_machine_name_count
[MACHINE_SIGNATURE_SIZE
+ 9];
493 char * candidate_arch
;
494 off_t current_arch_start
= 0;
496 lseek (fd
, 0, SEEK_SET
);
497 FcCacheSkipString (fd
);
498 current_arch_start
= lseek (fd
, 0, SEEK_CUR
);
500 /* skip arches that are not the current arch */
505 if (lseek (fd
, current_arch_start
, SEEK_SET
) != current_arch_start
)
508 if (FcCacheReadString (fd
, candidate_arch_machine_name_count
,
509 sizeof (candidate_arch_machine_name_count
)) == 0)
511 if (!strlen(candidate_arch_machine_name_count
))
513 bs
= strtol(candidate_arch_machine_name_count
, &candidate_arch
, 16);
515 // count = 0 should probably be distinguished from the !bs condition
516 if (!bs
|| bs
< strlen (candidate_arch_machine_name_count
))
519 candidate_arch
++; /* skip leading space */
521 if (strcmp (candidate_arch
, arch
)==0)
522 return current_arch_start
;
523 current_arch_start
+= bs
;
529 /* Cuts out the segment at the file pointer (moves everything else
530 * down to cover it), and leaves the file pointer at the end of the
533 FcCacheCopyOld (int fd
, int fd_orig
, off_t start
)
535 char * buf
= malloc (8192);
536 char candidate_arch_machine_name
[MACHINE_SIGNATURE_SIZE
+ 9];
538 int c
, bytes_skipped
;
545 lseek (fd
, 0, SEEK_SET
); lseek (fd_orig
, 0, SEEK_SET
);
552 if ((c
= read (fd_orig
, buf
, b
)) <= 0)
554 if (write (fd
, buf
, c
) < 0)
561 lseek (fd
, start
, SEEK_SET
);
562 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
563 sizeof (candidate_arch_machine_name
)) == 0)
565 if (!strlen(candidate_arch_machine_name
))
568 bs
= strtol(candidate_arch_machine_name
, 0, 16);
575 lseek (fd
, start
+bs
+bytes_skipped
, SEEK_SET
);
576 if ((c
= read (fd
, buf
, 8192)) <= 0)
578 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
579 if (write (fd
, buf
, c
) < 0)
584 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
595 /* Does not check that the cache has the appropriate arch section. */
596 /* Also, this can be fooled if the original location has a stale
597 * cache, and the hashed location has an up-to-date cache. Oh well,
598 * sucks to be you in that case! */
600 FcDirCacheValid (const FcChar8
*dir
)
602 struct stat file_stat
, dir_stat
;
605 if (stat ((char *) dir
, &dir_stat
) < 0)
608 fd
= FcDirCacheOpen (dir
);
612 if (fstat (fd
, &file_stat
) < 0)
618 * If the directory has been modified more recently than
619 * the cache file, the cache is not valid
621 if (dir_stat
.st_mtime
> file_stat
.st_mtime
)
631 /* Assumes that the cache file in 'dir' exists.
632 * Checks that the cache has the appropriate arch section. */
634 FcDirCacheHasCurrentArch (const FcChar8
*dir
)
637 off_t current_arch_start
;
638 char *current_arch_machine_name
;
640 fd
= FcDirCacheOpen (dir
);
644 current_arch_machine_name
= FcCacheMachineSignature();
645 current_arch_start
= FcCacheSkipToArch(fd
, current_arch_machine_name
);
648 if (current_arch_start
< 0)
658 FcDirCacheUnlink (const FcChar8
*dir
, FcConfig
*config
)
663 struct stat cache_stat
;
664 char name_buf
[FC_MAX_FILE_LEN
];
666 dir
= FcConfigNormalizeFontDir (config
, dir
);
667 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
671 /* First remove normal cache file. */
672 if (stat ((char *) cache_file
, &cache_stat
) == 0 &&
673 unlink ((char *)cache_file
) != 0)
676 /* Next remove any applicable hashed files. */
677 fd
= -1; collisions
= 0;
680 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
686 fd
= open(cache_hashed
, O_RDONLY
);
689 FcStrFree ((FcChar8
*)cache_file
);
693 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
694 if (!strlen(name_buf
))
696 } while (strcmp (name_buf
, cache_file
) != 0);
698 FcStrFree ((FcChar8
*)cache_file
);
701 if (stat ((char *) cache_hashed
, &cache_stat
) == 0 &&
702 unlink ((char *)cache_hashed
) != 0)
704 FcStrFree ((FcChar8
*)cache_hashed
);
708 FcStrFree ((FcChar8
*)cache_hashed
);
712 FcStrFree ((FcChar8
*)cache_file
);
717 FcCacheReadDirs (FcConfig
* config
, FcGlobalCache
* cache
,
718 FcStrList
*list
, FcFontSet
* set
)
722 FcChar8
*file
, *base
;
728 * Read in the results from 'list'.
730 while ((dir
= FcStrListNext (list
)))
732 if (!FcConfigAcceptFilename (config
, dir
))
736 file
= (FcChar8
*) malloc (strlen ((char *) dir
) + 1 + FC_MAX_FILE_LEN
+ 1);
740 strcpy ((char *) file
, (char *) dir
);
741 strcat ((char *) file
, "/");
742 base
= file
+ strlen ((char *) file
);
744 subdirs
= FcStrSetCreate ();
747 fprintf (stderr
, "Can't create directory set\n");
753 if (access ((char *) dir
, X_OK
) < 0)
761 fprintf (stderr
, "\"%s\": ", dir
);
765 FcStrSetDestroy (subdirs
);
769 if (stat ((char *) dir
, &statb
) == -1)
771 fprintf (stderr
, "\"%s\": ", dir
);
773 FcStrSetDestroy (subdirs
);
778 if (!S_ISDIR (statb
.st_mode
))
780 fprintf (stderr
, "\"%s\": not a directory, skipping\n", dir
);
781 FcStrSetDestroy (subdirs
);
785 if (!FcDirCacheValid (dir
) || !FcDirCacheRead (set
, subdirs
, dir
, config
))
787 if (FcDebug () & FC_DBG_FONTSET
)
788 printf ("cache scan dir %s\n", dir
);
790 FcDirScanConfig (set
, subdirs
, cache
,
791 config
->blanks
, dir
, FcFalse
, config
);
793 sublist
= FcStrListCreate (subdirs
);
794 FcStrSetDestroy (subdirs
);
797 fprintf (stderr
, "Can't create subdir list in \"%s\"\n", dir
);
802 ret
+= FcCacheReadDirs (config
, cache
, sublist
, set
);
805 FcStrListDone (list
);
810 FcCacheRead (FcConfig
*config
, FcGlobalCache
* cache
)
812 FcFontSet
* s
= FcFontSetCreate();
816 if (FcCacheReadDirs (config
, cache
, FcConfigGetConfigDirs (config
), s
))
822 FcFontSetDestroy (s
);
826 static const char bin2hex
[] = { '0', '1', '2', '3',
829 'c', 'd', 'e', 'f' };
832 FcDirCacheHashName (char * cache_file
, int collisions
)
834 unsigned char hash
[16], hex_hash
[33];
836 unsigned char uscore
= '_';
839 struct MD5Context ctx
;
842 MD5Update (&ctx
, (unsigned char *)cache_file
, strlen (cache_file
));
844 for (i
= 0; i
< collisions
; i
++)
845 MD5Update (&ctx
, &uscore
, 1);
847 MD5Final (hash
, &ctx
);
849 for (cnt
= 0; cnt
< 16; ++cnt
)
851 hex_hash
[2*cnt
] = bin2hex
[hash
[cnt
] >> 4];
852 hex_hash
[2*cnt
+1] = bin2hex
[hash
[cnt
] & 0xf];
856 tmp
= FcStrPlus ((FcChar8
*)hex_hash
, (FcChar8
*)FC_CACHE_SUFFIX
);
860 cache_hashed
= (char *)FcStrPlus ((FcChar8
*)PKGCACHEDIR
"/", tmp
);
866 /* Opens the hashed name for cache_file.
867 * This would fail in the unlikely event of a collision and subsequent
868 * removal of the file which originally caused the collision. */
870 FcDirCacheOpen (const FcChar8
*dir
)
873 int fd
= -1, collisions
= 0;
874 char *cache_file
, *cache_hashed
;
875 char name_buf
[FC_MAX_FILE_LEN
];
876 struct stat dir_stat
;
878 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
882 fd
= open(cache_file
, O_RDONLY
);
886 if (stat ((char *)dir
, &dir_stat
) == -1)
893 FcChar8
* name_buf_dir
;
895 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
901 fd
= open(cache_hashed
, O_RDONLY
);
902 FcStrFree ((FcChar8
*)cache_hashed
);
906 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
907 if (!strlen(name_buf
))
910 name_buf_dir
= FcStrDirname ((FcChar8
*)name_buf
);
911 if (stat ((char *)name_buf_dir
, &c
) == -1)
913 FcStrFree (name_buf_dir
);
916 FcStrFree (name_buf_dir
);
917 found
= c
.st_ino
== dir_stat
.st_ino
;
926 /* read serialized state from the cache file */
928 FcDirCacheRead (FcFontSet
* set
, FcStrSet
* dirs
, const FcChar8
*dir
, FcConfig
*config
)
931 char *current_arch_machine_name
;
932 char candidate_arch_machine_name
[9+MACHINE_SIGNATURE_SIZE
];
933 off_t current_arch_start
= 0;
934 char subdirName
[FC_MAX_FILE_LEN
+ 1 + 12 + 1];
936 fd
= FcDirCacheOpen (dir
);
940 current_arch_machine_name
= FcCacheMachineSignature();
941 current_arch_start
= FcCacheSkipToArch(fd
,
942 current_arch_machine_name
);
943 if (current_arch_start
< 0)
946 lseek (fd
, current_arch_start
, SEEK_SET
);
947 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
948 sizeof (candidate_arch_machine_name
)) == 0)
951 while (strlen(FcCacheReadString (fd
, subdirName
, sizeof (subdirName
))) > 0)
952 FcStrSetAdd (dirs
, (FcChar8
*)subdirName
);
954 if (!FcDirCacheConsume (fd
, (const char *)dir
, set
, config
))
967 FcDirCacheConsume (int fd
, const char * dir
, FcFontSet
*set
, FcConfig
*config
)
970 void * current_dir_block
;
973 read(fd
, &metadata
, sizeof(FcCache
));
974 if (metadata
.magic
!= FC_CACHE_MAGIC
)
979 pos
= FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
));
980 lseek (fd
, pos
, SEEK_SET
);
982 FcConfigAddFontDir (config
, (FcChar8
*)dir
);
986 pos
= FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
));
987 current_dir_block
= mmap (0, metadata
.count
,
988 PROT_READ
, MAP_SHARED
, fd
, pos
);
989 lseek (fd
, pos
+metadata
.count
, SEEK_SET
);
990 if (current_dir_block
== MAP_FAILED
)
993 FcCacheAddBankDir (metadata
.bank
, dir
);
995 FcConfigAddFontDir (config
, (FcChar8
*)dir
);
997 if (!FcFontSetUnserialize (&metadata
, set
, current_dir_block
))
1004 FcDirCacheProduce (FcFontSet
*set
, FcCache
*metadata
)
1006 void * current_dir_block
, * final_dir_block
;
1007 static unsigned int rand_state
= 0;
1008 int bank
, needed_bytes_no_align
;
1011 rand_state
= time(0L);
1012 bank
= rand_r(&rand_state
);
1014 while (FcCacheHaveBank(bank
))
1015 bank
= rand_r(&rand_state
);
1017 memset (metadata
, 0, sizeof(FcCache
));
1019 needed_bytes_no_align
= FcFontSetNeededBytes (set
);
1020 metadata
->count
= needed_bytes_no_align
+
1021 FcFontSetNeededBytesAlign ();
1022 metadata
->magic
= FC_CACHE_MAGIC
;
1023 metadata
->bank
= bank
;
1025 if (!needed_bytes_no_align
) /* not a failure, no fonts to write */
1027 /* no, you don't really need to write any bytes at all. */
1028 metadata
->count
= 0;
1032 current_dir_block
= malloc (metadata
->count
);
1033 if (!current_dir_block
)
1036 memset (current_dir_block
, 0, metadata
->count
);
1037 final_dir_block
= FcFontSetDistributeBytes (metadata
, current_dir_block
);
1039 if ((void *)((char *)current_dir_block
+metadata
->count
) < final_dir_block
)
1042 if (!FcFontSetSerialize (bank
, set
))
1045 return current_dir_block
;
1048 free (current_dir_block
);
1052 /* write serialized state to the cache file */
1054 FcDirCacheWrite (FcFontSet
*set
, FcStrSet
*dirs
, const FcChar8
*dir
)
1058 int fd
, fd_orig
, i
, dirs_count
;
1061 off_t current_arch_start
= 0, truncate_to
;
1062 char name_buf
[FC_MAX_FILE_LEN
];
1065 char *current_arch_machine_name
, * header
;
1066 void *current_dir_block
= 0;
1068 dir
= FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir
);
1072 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
1076 /* Ensure that we're not trampling a cache for some other dir. */
1077 /* This is slightly different from FcDirCacheOpen, since it
1078 * needs the filename, not the file descriptor. */
1079 fd
= -1; collisions
= 0;
1082 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
1088 fd
= open(cache_hashed
, O_RDONLY
);
1091 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
1094 if (!strlen(name_buf
))
1097 if (strcmp (name_buf
, cache_file
) != 0)
1101 current_dir_block
= FcDirCacheProduce (set
, &metadata
);
1103 if (metadata
.count
&& !current_dir_block
)
1106 if (FcDebug () & FC_DBG_CACHE
)
1107 printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file
);
1109 atomic
= FcAtomicCreate ((FcChar8
*)cache_hashed
);
1113 if (!FcAtomicLock (atomic
))
1115 /* Now try rewriting the original version of the file. */
1116 FcAtomicDestroy (atomic
);
1118 atomic
= FcAtomicCreate ((FcChar8
*)cache_file
);
1119 fd_orig
= open (cache_file
, O_RDONLY
);
1121 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1123 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1128 /* In all cases, try opening the real location of the cache file first. */
1129 /* (even if that's not atomic.) */
1130 fd_orig
= open (cache_file
, O_RDONLY
);
1132 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1134 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1138 FcCacheWriteString (fd
, cache_file
);
1140 current_arch_machine_name
= FcCacheMachineSignature ();
1141 current_arch_start
= 0;
1144 current_arch_start
=
1145 FcCacheSkipToArch(fd_orig
, current_arch_machine_name
);
1147 if (current_arch_start
< 0)
1148 current_arch_start
= FcCacheNextOffset (lseek(fd_orig
, 0, SEEK_END
));
1150 if (fd_orig
!= -1 && !FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
1156 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
1157 if (ftruncate (fd
, current_arch_start
) == -1)
1160 /* allocate space for subdir names in this block */
1162 for (i
= 0; i
< dirs
->size
; i
++)
1163 dirs_count
+= strlen((char *)dirs
->strs
[i
]) + 1;
1166 /* now write the address of the next offset */
1167 truncate_to
= FcCacheNextOffset (FcCacheNextOffset (current_arch_start
+ sizeof (FcCache
) + dirs_count
) + metadata
.count
) - current_arch_start
;
1168 header
= malloc (10 + strlen (current_arch_machine_name
));
1171 sprintf (header
, "%8x ", (int)truncate_to
);
1172 strcat (header
, current_arch_machine_name
);
1173 if (!FcCacheWriteString (fd
, header
))
1176 for (i
= 0; i
< dirs
->size
; i
++)
1177 FcCacheWriteString (fd
, (char *)dirs
->strs
[i
]);
1178 FcCacheWriteString (fd
, "");
1180 write (fd
, &metadata
, sizeof(FcCache
));
1183 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_END
)), SEEK_SET
);
1184 write (fd
, current_dir_block
, metadata
.count
);
1185 free (current_dir_block
);
1188 /* this actually serves to pad out the cache file, if needed */
1189 if (ftruncate (fd
, current_arch_start
+ truncate_to
) == -1)
1193 if (!FcAtomicReplaceOrig(atomic
))
1195 FcStrFree ((FcChar8
*)cache_hashed
);
1196 FcAtomicUnlock (atomic
);
1197 FcAtomicDestroy (atomic
);
1205 FcAtomicUnlock (atomic
);
1207 FcAtomicDestroy (atomic
);
1209 FcStrFree ((FcChar8
*)cache_hashed
);
1211 unlink ((char *)cache_file
);
1213 if (current_dir_block
)
1214 free (current_dir_block
);
1220 FcCacheMachineSignature ()
1222 static char buf
[MACHINE_SIGNATURE_SIZE
];
1223 int32_t magic
= ENDIAN_TEST
;
1224 char * m
= (char *)&magic
;
1226 sprintf (buf
, "%2x%2x%2x%2x "
1227 "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
1228 "%4x %4x %4x %4x %4x %4x %4x %4x\n",
1229 m
[0], m
[1], m
[2], m
[3],
1230 (unsigned int)sizeof (char),
1231 (unsigned int)sizeof (char *),
1232 (unsigned int)sizeof (int),
1233 (unsigned int)sizeof (FcPattern
),
1234 (unsigned int)sizeof (FcPatternEltPtr
),
1235 (unsigned int)sizeof (struct _FcPatternElt
*),
1236 (unsigned int)sizeof (FcPatternElt
),
1237 (unsigned int)sizeof (FcObjectPtr
),
1238 (unsigned int)sizeof (FcValueListPtr
),
1239 (unsigned int)sizeof (FcValue
),
1240 (unsigned int)sizeof (FcValueBinding
),
1241 (unsigned int)sizeof (struct _FcValueList
*),
1242 (unsigned int)sizeof (FcCharSet
),
1243 (unsigned int)sizeof (FcCharLeaf
**),
1244 (unsigned int)sizeof (FcChar16
*),
1245 (unsigned int)sizeof (FcChar16
),
1246 (unsigned int)sizeof (FcCharLeaf
),
1247 (unsigned int)sizeof (FcChar32
),
1248 (unsigned int)sizeof (FcCache
),
1249 (unsigned int)sysconf(_SC_PAGESIZE
));
1254 static int banks_ptr
= 0, banks_alloc
= 0;
1255 int * _fcBankId
= 0, * _fcBankIdx
= 0;
1256 static const char ** bankDirs
= 0;
1259 FcCacheHaveBank (int bank
)
1263 if (bank
< FC_BANK_FIRST
)
1266 for (i
= 0; i
< banks_ptr
; i
++)
1267 if (_fcBankId
[i
] == bank
)
1274 FcCacheBankToIndexMTF (int bank
)
1278 for (i
= 0; i
< banks_ptr
; i
++)
1279 if (_fcBankId
[_fcBankIdx
[i
]] == bank
)
1281 int t
= _fcBankIdx
[i
];
1283 for (j
= i
; j
> 0; j
--)
1284 _fcBankIdx
[j
] = _fcBankIdx
[j
-1];
1289 if (banks_ptr
>= banks_alloc
)
1294 b
= realloc (_fcBankId
, (banks_alloc
+ 4) * sizeof(int));
1299 bidx
= realloc (_fcBankIdx
, (banks_alloc
+ 4) * sizeof(int));
1304 bds
= realloc (bankDirs
, (banks_alloc
+ 4) * sizeof (char *));
1313 _fcBankId
[i
] = bank
;
1319 FcCacheAddBankDir (int bank
, const char * dir
)
1321 int bi
= FcCacheBankToIndexMTF (bank
);
1326 bankDirs
[bi
] = (const char *)FcStrCopy ((FcChar8
*)dir
);
1330 FcCacheFindBankDir (int bank
)
1332 int bi
= FcCacheBankToIndex (bank
);
1333 return bankDirs
[bi
];
1337 * This code implements the MD5 message-digest algorithm.
1338 * The algorithm is due to Ron Rivest. This code was
1339 * written by Colin Plumb in 1993, no copyright is claimed.
1340 * This code is in the public domain; do with it what you wish.
1342 * Equivalent code is available from RSA Data Security, Inc.
1343 * This code has been tested against that, and is equivalent,
1344 * except that you don't need to include two pages of legalese
1347 * To compute the message digest of a chunk of bytes, declare an
1348 * MD5Context structure, pass it to MD5Init, call MD5Update as
1349 * needed on buffers full of bytes, and then call MD5Final, which
1350 * will fill a supplied 16-byte array with the digest.
1354 #define byteReverse(buf, len) /* Nothing */
1357 * Note: this code is harmless on little-endian machines.
1359 void byteReverse(unsigned char *buf
, unsigned longs
)
1363 t
= (FcChar32
) ((unsigned) buf
[3] << 8 | buf
[2]) << 16 |
1364 ((unsigned) buf
[1] << 8 | buf
[0]);
1365 *(FcChar32
*) buf
= t
;
1372 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
1373 * initialization constants.
1375 static void MD5Init(struct MD5Context
*ctx
)
1377 ctx
->buf
[0] = 0x67452301;
1378 ctx
->buf
[1] = 0xefcdab89;
1379 ctx
->buf
[2] = 0x98badcfe;
1380 ctx
->buf
[3] = 0x10325476;
1387 * Update context to reflect the concatenation of another buffer full
1390 static void MD5Update(struct MD5Context
*ctx
, unsigned char *buf
, unsigned len
)
1394 /* Update bitcount */
1397 if ((ctx
->bits
[0] = t
+ ((FcChar32
) len
<< 3)) < t
)
1398 ctx
->bits
[1]++; /* Carry from low to high */
1399 ctx
->bits
[1] += len
>> 29;
1401 t
= (t
>> 3) & 0x3f; /* Bytes already in shsInfo->data */
1403 /* Handle any leading odd-sized chunks */
1406 unsigned char *p
= (unsigned char *) ctx
->in
+ t
;
1410 memcpy(p
, buf
, len
);
1414 byteReverse(ctx
->in
, 16);
1415 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1419 /* Process data in 64-byte chunks */
1422 memcpy(ctx
->in
, buf
, 64);
1423 byteReverse(ctx
->in
, 16);
1424 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1429 /* Handle any remaining bytes of data. */
1431 memcpy(ctx
->in
, buf
, len
);
1435 * Final wrapup - pad to 64-byte boundary with the bit pattern
1436 * 1 0* (64-bit count of bits processed, MSB-first)
1438 static void MD5Final(unsigned char digest
[16], struct MD5Context
*ctx
)
1443 /* Compute number of bytes mod 64 */
1444 count
= (ctx
->bits
[0] >> 3) & 0x3F;
1446 /* Set the first char of padding to 0x80. This is safe since there is
1447 always at least one byte free */
1448 p
= ctx
->in
+ count
;
1451 /* Bytes of padding needed to make 64 bytes */
1452 count
= 64 - 1 - count
;
1454 /* Pad out to 56 mod 64 */
1456 /* Two lots of padding: Pad the first block to 64 bytes */
1457 memset(p
, 0, count
);
1458 byteReverse(ctx
->in
, 16);
1459 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1461 /* Now fill the next block with 56 bytes */
1462 memset(ctx
->in
, 0, 56);
1464 /* Pad block to 56 bytes */
1465 memset(p
, 0, count
- 8);
1467 byteReverse(ctx
->in
, 14);
1469 /* Append length in bits and transform */
1470 ((FcChar32
*) ctx
->in
)[14] = ctx
->bits
[0];
1471 ((FcChar32
*) ctx
->in
)[15] = ctx
->bits
[1];
1473 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1474 byteReverse((unsigned char *) ctx
->buf
, 4);
1475 memcpy(digest
, ctx
->buf
, 16);
1476 memset(ctx
, 0, sizeof(ctx
)); /* In case it's sensitive */
1480 /* The four core functions - F1 is optimized somewhat */
1482 /* #define F1(x, y, z) (x & y | ~x & z) */
1483 #define F1(x, y, z) (z ^ (x & (y ^ z)))
1484 #define F2(x, y, z) F1(z, x, y)
1485 #define F3(x, y, z) (x ^ y ^ z)
1486 #define F4(x, y, z) (y ^ (x | ~z))
1488 /* This is the central step in the MD5 algorithm. */
1489 #define MD5STEP(f, w, x, y, z, data, s) \
1490 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
1493 * The core of the MD5 algorithm, this alters an existing MD5 hash to
1494 * reflect the addition of 16 longwords of new data. MD5Update blocks
1495 * the data and converts bytes into longwords for this routine.
1497 static void MD5Transform(FcChar32 buf
[4], FcChar32 in
[16])
1499 register FcChar32 a
, b
, c
, d
;
1506 MD5STEP(F1
, a
, b
, c
, d
, in
[0] + 0xd76aa478, 7);
1507 MD5STEP(F1
, d
, a
, b
, c
, in
[1] + 0xe8c7b756, 12);
1508 MD5STEP(F1
, c
, d
, a
, b
, in
[2] + 0x242070db, 17);
1509 MD5STEP(F1
, b
, c
, d
, a
, in
[3] + 0xc1bdceee, 22);
1510 MD5STEP(F1
, a
, b
, c
, d
, in
[4] + 0xf57c0faf, 7);
1511 MD5STEP(F1
, d
, a
, b
, c
, in
[5] + 0x4787c62a, 12);
1512 MD5STEP(F1
, c
, d
, a
, b
, in
[6] + 0xa8304613, 17);
1513 MD5STEP(F1
, b
, c
, d
, a
, in
[7] + 0xfd469501, 22);
1514 MD5STEP(F1
, a
, b
, c
, d
, in
[8] + 0x698098d8, 7);
1515 MD5STEP(F1
, d
, a
, b
, c
, in
[9] + 0x8b44f7af, 12);
1516 MD5STEP(F1
, c
, d
, a
, b
, in
[10] + 0xffff5bb1, 17);
1517 MD5STEP(F1
, b
, c
, d
, a
, in
[11] + 0x895cd7be, 22);
1518 MD5STEP(F1
, a
, b
, c
, d
, in
[12] + 0x6b901122, 7);
1519 MD5STEP(F1
, d
, a
, b
, c
, in
[13] + 0xfd987193, 12);
1520 MD5STEP(F1
, c
, d
, a
, b
, in
[14] + 0xa679438e, 17);
1521 MD5STEP(F1
, b
, c
, d
, a
, in
[15] + 0x49b40821, 22);
1523 MD5STEP(F2
, a
, b
, c
, d
, in
[1] + 0xf61e2562, 5);
1524 MD5STEP(F2
, d
, a
, b
, c
, in
[6] + 0xc040b340, 9);
1525 MD5STEP(F2
, c
, d
, a
, b
, in
[11] + 0x265e5a51, 14);
1526 MD5STEP(F2
, b
, c
, d
, a
, in
[0] + 0xe9b6c7aa, 20);
1527 MD5STEP(F2
, a
, b
, c
, d
, in
[5] + 0xd62f105d, 5);
1528 MD5STEP(F2
, d
, a
, b
, c
, in
[10] + 0x02441453, 9);
1529 MD5STEP(F2
, c
, d
, a
, b
, in
[15] + 0xd8a1e681, 14);
1530 MD5STEP(F2
, b
, c
, d
, a
, in
[4] + 0xe7d3fbc8, 20);
1531 MD5STEP(F2
, a
, b
, c
, d
, in
[9] + 0x21e1cde6, 5);
1532 MD5STEP(F2
, d
, a
, b
, c
, in
[14] + 0xc33707d6, 9);
1533 MD5STEP(F2
, c
, d
, a
, b
, in
[3] + 0xf4d50d87, 14);
1534 MD5STEP(F2
, b
, c
, d
, a
, in
[8] + 0x455a14ed, 20);
1535 MD5STEP(F2
, a
, b
, c
, d
, in
[13] + 0xa9e3e905, 5);
1536 MD5STEP(F2
, d
, a
, b
, c
, in
[2] + 0xfcefa3f8, 9);
1537 MD5STEP(F2
, c
, d
, a
, b
, in
[7] + 0x676f02d9, 14);
1538 MD5STEP(F2
, b
, c
, d
, a
, in
[12] + 0x8d2a4c8a, 20);
1540 MD5STEP(F3
, a
, b
, c
, d
, in
[5] + 0xfffa3942, 4);
1541 MD5STEP(F3
, d
, a
, b
, c
, in
[8] + 0x8771f681, 11);
1542 MD5STEP(F3
, c
, d
, a
, b
, in
[11] + 0x6d9d6122, 16);
1543 MD5STEP(F3
, b
, c
, d
, a
, in
[14] + 0xfde5380c, 23);
1544 MD5STEP(F3
, a
, b
, c
, d
, in
[1] + 0xa4beea44, 4);
1545 MD5STEP(F3
, d
, a
, b
, c
, in
[4] + 0x4bdecfa9, 11);
1546 MD5STEP(F3
, c
, d
, a
, b
, in
[7] + 0xf6bb4b60, 16);
1547 MD5STEP(F3
, b
, c
, d
, a
, in
[10] + 0xbebfbc70, 23);
1548 MD5STEP(F3
, a
, b
, c
, d
, in
[13] + 0x289b7ec6, 4);
1549 MD5STEP(F3
, d
, a
, b
, c
, in
[0] + 0xeaa127fa, 11);
1550 MD5STEP(F3
, c
, d
, a
, b
, in
[3] + 0xd4ef3085, 16);
1551 MD5STEP(F3
, b
, c
, d
, a
, in
[6] + 0x04881d05, 23);
1552 MD5STEP(F3
, a
, b
, c
, d
, in
[9] + 0xd9d4d039, 4);
1553 MD5STEP(F3
, d
, a
, b
, c
, in
[12] + 0xe6db99e5, 11);
1554 MD5STEP(F3
, c
, d
, a
, b
, in
[15] + 0x1fa27cf8, 16);
1555 MD5STEP(F3
, b
, c
, d
, a
, in
[2] + 0xc4ac5665, 23);
1557 MD5STEP(F4
, a
, b
, c
, d
, in
[0] + 0xf4292244, 6);
1558 MD5STEP(F4
, d
, a
, b
, c
, in
[7] + 0x432aff97, 10);
1559 MD5STEP(F4
, c
, d
, a
, b
, in
[14] + 0xab9423a7, 15);
1560 MD5STEP(F4
, b
, c
, d
, a
, in
[5] + 0xfc93a039, 21);
1561 MD5STEP(F4
, a
, b
, c
, d
, in
[12] + 0x655b59c3, 6);
1562 MD5STEP(F4
, d
, a
, b
, c
, in
[3] + 0x8f0ccc92, 10);
1563 MD5STEP(F4
, c
, d
, a
, b
, in
[10] + 0xffeff47d, 15);
1564 MD5STEP(F4
, b
, c
, d
, a
, in
[1] + 0x85845dd1, 21);
1565 MD5STEP(F4
, a
, b
, c
, d
, in
[8] + 0x6fa87e4f, 6);
1566 MD5STEP(F4
, d
, a
, b
, c
, in
[15] + 0xfe2ce6e0, 10);
1567 MD5STEP(F4
, c
, d
, a
, b
, in
[6] + 0xa3014314, 15);
1568 MD5STEP(F4
, b
, c
, d
, a
, in
[13] + 0x4e0811a1, 21);
1569 MD5STEP(F4
, a
, b
, c
, d
, in
[4] + 0xf7537e82, 6);
1570 MD5STEP(F4
, d
, a
, b
, c
, in
[11] + 0xbd3af235, 10);
1571 MD5STEP(F4
, c
, d
, a
, b
, in
[2] + 0x2ad7d2bb, 15);
1572 MD5STEP(F4
, b
, c
, d
, a
, in
[9] + 0xeb86d391, 21);