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 (char * cache_file
);
43 FcDirCacheHashName (char * cache_file
, int collisions
);
46 FcCacheSkipToArch (int fd
, const char * arch
, FcBool global
);
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
);
58 FcDirCacheRead (FcFontSet
* set
, FcStrSet
* dirs
, const FcChar8
*dir
);
61 FcCacheNextOffset(off_t w
);
64 FcCacheMachineSignature (void);
67 FcCacheHaveBank (int bank
);
70 FcCacheAddBankDir (int bank
, const char * dir
);
78 static void MD5Init(struct MD5Context
*ctx
);
79 static void MD5Update(struct MD5Context
*ctx
, unsigned char *buf
, unsigned len
);
80 static void MD5Final(unsigned char digest
[16], struct MD5Context
*ctx
);
81 static void MD5Transform(FcChar32 buf
[4], FcChar32 in
[16]);
83 #define FC_DBG_CACHE_REF 1024
86 FcCacheReadString (int fd
, char *dest
, int len
)
99 while (read (fd
, &c
, 1) == 1)
126 FcCacheSkipString (int fd
)
132 while (read (fd
, &c
, 1) == 1)
153 FcCacheWriteString (int fd
, const char *chars
)
155 if (write (fd
, chars
, strlen(chars
)+1) != strlen(chars
)+1)
161 FcGlobalCacheDirDestroy (FcGlobalCacheDir
*d
)
163 FcMemFree (FC_MEM_STRING
, strlen (d
->name
)+1);
165 FcMemFree (FC_MEM_CACHE
, sizeof (FcGlobalCacheDir
));
170 FcGlobalCacheCreate (void)
172 FcGlobalCache
*cache
;
174 cache
= malloc (sizeof (FcGlobalCache
));
177 FcMemAlloc (FC_MEM_CACHE
, sizeof (FcGlobalCache
));
179 cache
->updated
= FcFalse
;
185 FcGlobalCacheDestroy (FcGlobalCache
*cache
)
187 FcGlobalCacheDir
*d
, *next
;
189 for (d
= cache
->dirs
; d
; d
= next
)
192 FcGlobalCacheDirDestroy (d
);
194 FcMemFree (FC_MEM_CACHE
, sizeof (FcGlobalCache
));
199 FcGlobalCacheLoad (FcGlobalCache
*cache
,
201 const FcChar8
*cache_file
,
204 char name_buf
[FC_MAX_FILE_LEN
];
205 FcGlobalCacheDir
*d
, *next
;
206 FcFileTime config_time
= FcConfigModifiedTime (config
);
207 char * current_arch_machine_name
;
208 char candidate_arch_machine_name
[MACHINE_SIGNATURE_SIZE
+ 9];
209 off_t current_arch_start
;
211 struct stat cache_stat
, dir_stat
;
213 if (stat ((char *) cache_file
, &cache_stat
) < 0)
216 cache
->fd
= open ((char *) cache_file
, O_RDONLY
);
220 cache
->updated
= FcFalse
;
222 current_arch_machine_name
= FcCacheMachineSignature ();
223 current_arch_start
= FcCacheSkipToArch(cache
->fd
,
224 current_arch_machine_name
, FcTrue
);
225 if (current_arch_start
< 0)
226 goto bail_and_destroy
;
228 lseek (cache
->fd
, current_arch_start
, SEEK_SET
);
229 FcCacheReadString (cache
->fd
, candidate_arch_machine_name
,
230 sizeof (candidate_arch_machine_name
));
231 if (strlen(candidate_arch_machine_name
) == 0)
232 goto bail_and_destroy
;
238 FcCacheReadString (cache
->fd
, name_buf
, sizeof (name_buf
));
239 if (!strlen(name_buf
))
242 /* Directory must be older than the global cache file; also
243 cache must be newer than the config file. */
244 if (stat ((char *) name_buf
, &dir_stat
) < 0 ||
245 dir_stat
.st_mtime
> cache_stat
.st_mtime
||
246 (config_time
.set
&& cache_stat
.st_mtime
< config_time
.time
))
250 FcStrSetAdd (staleDirs
, FcStrCopy ((FcChar8
*)name_buf
));
251 read (cache
->fd
, &md
, sizeof (FcCache
));
252 lseek (cache
->fd
, FcCacheNextOffset (lseek(cache
->fd
, 0, SEEK_CUR
)) + md
.count
, SEEK_SET
);
256 d
= malloc (sizeof (FcGlobalCacheDir
));
260 d
->next
= cache
->dirs
;
263 d
->name
= (char *)FcStrCopy ((FcChar8
*)name_buf
);
265 d
->offset
= lseek (cache
->fd
, 0, SEEK_CUR
);
266 if (read (cache
->fd
, &d
->metadata
, sizeof (FcCache
)) != sizeof (FcCache
))
268 targ
= FcCacheNextOffset (lseek(cache
->fd
, 0, SEEK_CUR
)) + d
->metadata
.count
;
269 if (lseek (cache
->fd
, targ
, SEEK_SET
) != targ
)
275 for (d
= cache
->dirs
; d
; d
= next
)
290 if (stat ((char *) cache_file
, &cache_stat
) == 0)
291 unlink ((char *)cache_file
);
298 FcGlobalCacheReadDir (FcFontSet
*set
, FcStrSet
*dirs
, FcGlobalCache
* cache
, const char *dir
, FcConfig
*config
)
301 FcBool ret
= FcFalse
;
306 for (d
= cache
->dirs
; d
; d
= d
->next
)
308 if (strncmp (d
->name
, dir
, strlen(dir
)) == 0)
310 lseek (cache
->fd
, d
->offset
, SEEK_SET
);
311 if (!FcDirCacheConsume (cache
->fd
, dir
, set
))
313 if (strcmp (d
->name
, dir
) == 0)
322 FcGlobalCacheUpdate (FcGlobalCache
*cache
,
326 FcGlobalCacheDir
* d
;
331 for (d
= cache
->dirs
; d
; d
= d
->next
)
333 if (strcmp(d
->name
, name
) == 0)
339 d
= malloc (sizeof (FcGlobalCacheDir
));
342 d
->next
= cache
->dirs
;
346 cache
->updated
= FcTrue
;
348 d
->name
= (char *)FcStrCopy ((FcChar8
*)name
);
349 d
->ent
= FcDirCacheProduce (set
, &d
->metadata
);
355 FcGlobalCacheSave (FcGlobalCache
*cache
,
356 const FcChar8
*cache_file
)
359 FcGlobalCacheDir
*dir
;
361 off_t current_arch_start
= 0, truncate_to
;
362 char * current_arch_machine_name
, * header
;
367 #if defined (HAVE_GETUID) && defined (HAVE_GETEUID)
368 /* Set-UID programs can't safely update the cache */
369 if (getuid () != geteuid ())
373 atomic
= FcAtomicCreate (cache_file
);
377 if (!FcAtomicLock (atomic
))
379 fd
= open ((char *) FcAtomicNewFile(atomic
), O_RDWR
| O_CREAT
,
384 fd_orig
= open ((char *) FcAtomicOrigFile(atomic
), O_RDONLY
);
386 current_arch_machine_name
= FcCacheMachineSignature ();
388 current_arch_start
= 0;
390 current_arch_start
= FcCacheSkipToArch (fd_orig
,
391 current_arch_machine_name
,
394 if (current_arch_start
< 0)
395 current_arch_start
= FcCacheNextOffset (lseek(fd_orig
, 0, SEEK_END
));
397 if (!FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
403 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
404 if (ftruncate (fd
, current_arch_start
) == -1)
407 header
= malloc (10 + strlen (current_arch_machine_name
));
411 truncate_to
= current_arch_start
+ strlen(current_arch_machine_name
) + 11;
412 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
414 truncate_to
+= strlen(dir
->name
) + 1;
415 truncate_to
+= sizeof (FcCache
);
416 truncate_to
= FcCacheNextOffset (truncate_to
);
417 truncate_to
+= dir
->metadata
.count
;
419 truncate_to
-= current_arch_start
;
421 sprintf (header
, "%8x ", (int)truncate_to
);
422 strcat (header
, current_arch_machine_name
);
423 if (!FcCacheWriteString (fd
, header
))
426 for (dir
= cache
->dirs
; dir
; dir
= dir
->next
)
430 FcCacheWriteString (fd
, dir
->name
);
431 write (fd
, &dir
->metadata
, sizeof(FcCache
));
432 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
)), SEEK_SET
);
433 write (fd
, dir
->ent
, dir
->metadata
.count
);
437 FcCacheWriteString (fd
, "");
439 if (close (fd
) == -1)
442 if (!FcAtomicReplaceOrig (atomic
))
445 FcAtomicUnlock (atomic
);
446 FcAtomicDestroy (atomic
);
448 cache
->updated
= FcFalse
;
459 FcAtomicDeleteNew (atomic
);
461 FcAtomicUnlock (atomic
);
463 FcAtomicDestroy (atomic
);
468 * Find the next presumably-mmapable offset after the supplied file
472 FcCacheNextOffset(off_t w
)
474 static long pagesize
= -1;
476 pagesize
= sysconf(_SC_PAGESIZE
);
477 if (w
% pagesize
== 0)
480 return ((w
/ pagesize
)+1)*pagesize
;
483 /* return the address of the segment for the provided arch,
484 * or -1 if arch not found */
486 FcCacheSkipToArch (int fd
, const char * arch
, FcBool global
)
488 char candidate_arch_machine_name_count
[MACHINE_SIGNATURE_SIZE
+ 9];
489 char * candidate_arch
;
490 off_t current_arch_start
= 0;
492 lseek (fd
, 0, SEEK_SET
);
494 FcCacheSkipString (fd
);
495 current_arch_start
= lseek (fd
, 0, SEEK_CUR
);
497 /* skip arches that are not the current arch */
502 if (lseek (fd
, current_arch_start
, SEEK_SET
) != current_arch_start
)
505 if (FcCacheReadString (fd
, candidate_arch_machine_name_count
,
506 sizeof (candidate_arch_machine_name_count
)) == 0)
508 if (!strlen(candidate_arch_machine_name_count
))
510 bs
= strtol(candidate_arch_machine_name_count
, &candidate_arch
, 16);
512 // count = 0 should probably be distinguished from the !bs condition
513 if (!bs
|| bs
< strlen (candidate_arch_machine_name_count
))
516 candidate_arch
++; /* skip leading space */
518 if (strcmp (candidate_arch
, arch
)==0)
519 return current_arch_start
;
520 current_arch_start
+= bs
;
526 /* Cuts out the segment at the file pointer (moves everything else
527 * down to cover it), and leaves the file pointer at the end of the
530 FcCacheCopyOld (int fd
, int fd_orig
, off_t start
)
532 char * buf
= malloc (8192);
533 char candidate_arch_machine_name
[MACHINE_SIGNATURE_SIZE
+ 9];
535 int c
, bytes_skipped
;
542 lseek (fd
, 0, SEEK_SET
); lseek (fd_orig
, 0, SEEK_SET
);
549 if ((c
= read (fd_orig
, buf
, b
)) <= 0)
551 if (write (fd
, buf
, c
) < 0)
558 lseek (fd
, start
, SEEK_SET
);
559 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
560 sizeof (candidate_arch_machine_name
)) == 0)
562 if (!strlen(candidate_arch_machine_name
))
565 bs
= strtol(candidate_arch_machine_name
, 0, 16);
572 lseek (fd
, start
+bs
+bytes_skipped
, SEEK_SET
);
573 if ((c
= read (fd
, buf
, 8192)) <= 0)
575 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
576 if (write (fd
, buf
, c
) < 0)
581 lseek (fd
, start
+bytes_skipped
, SEEK_SET
);
592 /* Does not check that the cache has the appropriate arch section. */
593 /* Also, this can be fooled if the original location has a stale
594 * cache, and the hashed location has an up-to-date cache. Oh well,
595 * sucks to be you in that case! */
597 FcDirCacheValid (const FcChar8
*dir
)
600 struct stat file_stat
, dir_stat
;
603 if (stat ((char *) dir
, &dir_stat
) < 0)
606 cache_file
= FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
610 fd
= FcDirCacheOpen ((char *)cache_file
);
614 if (fstat (fd
, &file_stat
) < 0)
618 FcStrFree (cache_file
);
621 * If the directory has been modified more recently than
622 * the cache file, the cache is not valid
624 if (dir_stat
.st_mtime
> file_stat
.st_mtime
)
632 FcStrFree (cache_file
);
636 /* Assumes that the cache file in 'dir' exists.
637 * Checks that the cache has the appropriate arch section. */
639 FcDirCacheHasCurrentArch (const FcChar8
*dir
)
643 off_t current_arch_start
;
644 char *current_arch_machine_name
;
646 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
650 fd
= FcDirCacheOpen (cache_file
);
654 current_arch_machine_name
= FcCacheMachineSignature();
655 current_arch_start
= FcCacheSkipToArch(fd
,
656 current_arch_machine_name
, FcFalse
);
659 if (current_arch_start
< 0)
670 FcDirCacheUnlink (const FcChar8
*dir
)
672 char *cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
675 struct stat cache_stat
;
676 char name_buf
[FC_MAX_FILE_LEN
];
678 /* First remove normal cache file. */
679 if (stat ((char *) cache_file
, &cache_stat
) == 0 &&
680 unlink ((char *)cache_file
) != 0)
683 /* Next remove any applicable hashed files. */
684 fd
= -1; collisions
= 0;
687 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
693 fd
= open(cache_hashed
, O_RDONLY
);
696 FcStrFree ((FcChar8
*)cache_file
);
700 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
701 if (!strlen(name_buf
))
703 } while (strcmp (name_buf
, cache_file
) != 0);
705 FcStrFree ((FcChar8
*)cache_file
);
708 if (stat ((char *) cache_hashed
, &cache_stat
) == 0 &&
709 unlink ((char *)cache_hashed
) != 0)
711 FcStrFree ((FcChar8
*)cache_hashed
);
715 FcStrFree ((FcChar8
*)cache_hashed
);
719 FcStrFree ((FcChar8
*)cache_file
);
724 FcCacheReadDirs (FcConfig
* config
, FcGlobalCache
* cache
,
725 FcStrList
*list
, FcFontSet
* set
)
729 FcChar8
*file
, *base
;
735 * Read in the results from 'list'.
737 while ((dir
= FcStrListNext (list
)))
739 if (!FcConfigAcceptFilename (config
, dir
))
743 file
= (FcChar8
*) malloc (strlen ((char *) dir
) + 1 + FC_MAX_FILE_LEN
+ 1);
747 strcpy ((char *) file
, (char *) dir
);
748 strcat ((char *) file
, "/");
749 base
= file
+ strlen ((char *) file
);
751 subdirs
= FcStrSetCreate ();
754 fprintf (stderr
, "Can't create directory set\n");
760 if (access ((char *) dir
, X_OK
) < 0)
768 fprintf (stderr
, "\"%s\": ", dir
);
772 FcStrSetDestroy (subdirs
);
776 if (stat ((char *) dir
, &statb
) == -1)
778 fprintf (stderr
, "\"%s\": ", dir
);
780 FcStrSetDestroy (subdirs
);
785 if (!S_ISDIR (statb
.st_mode
))
787 fprintf (stderr
, "\"%s\": not a directory, skipping\n", dir
);
788 FcStrSetDestroy (subdirs
);
792 if (!FcDirCacheValid (dir
) || !FcDirCacheRead (set
, subdirs
, dir
))
794 if (FcDebug () & FC_DBG_FONTSET
)
795 printf ("cache scan dir %s\n", dir
);
797 FcDirScanConfig (set
, subdirs
, cache
,
798 config
->blanks
, dir
, FcFalse
, config
);
800 sublist
= FcStrListCreate (subdirs
);
801 FcStrSetDestroy (subdirs
);
804 fprintf (stderr
, "Can't create subdir list in \"%s\"\n", dir
);
809 ret
+= FcCacheReadDirs (config
, cache
, sublist
, set
);
812 FcStrListDone (list
);
817 FcCacheRead (FcConfig
*config
, FcGlobalCache
* cache
)
819 FcFontSet
* s
= FcFontSetCreate();
823 if (FcCacheReadDirs (config
, cache
, FcConfigGetConfigDirs (config
), s
))
829 FcFontSetDestroy (s
);
833 static const char bin2hex
[] = { '0', '1', '2', '3',
836 'c', 'd', 'e', 'f' };
839 FcDirCacheHashName (char * cache_file
, int collisions
)
841 unsigned char hash
[16], hex_hash
[33];
843 unsigned char uscore
= '_';
846 struct MD5Context ctx
;
849 MD5Update (&ctx
, (unsigned char *)cache_file
, strlen (cache_file
));
851 for (i
= 0; i
< collisions
; i
++)
852 MD5Update (&ctx
, &uscore
, 1);
854 MD5Final (hash
, &ctx
);
856 for (cnt
= 0; cnt
< 16; ++cnt
)
858 hex_hash
[2*cnt
] = bin2hex
[hash
[cnt
] >> 4];
859 hex_hash
[2*cnt
+1] = bin2hex
[hash
[cnt
] & 0xf];
863 tmp
= FcStrPlus ((FcChar8
*)hex_hash
, (FcChar8
*)FC_CACHE_SUFFIX
);
867 cache_hashed
= (char *)FcStrPlus ((FcChar8
*)PKGCACHEDIR
"/", tmp
);
873 /* Opens the hashed name for cache_file.
874 * This would fail in the unlikely event of a collision and subsequent
875 * removal of the file which originally caused the collision. */
877 FcDirCacheOpen (char *cache_file
)
879 int fd
= -1, collisions
= 0;
881 char name_buf
[FC_MAX_FILE_LEN
];
883 fd
= open(cache_file
, O_RDONLY
);
889 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
895 fd
= open(cache_hashed
, O_RDONLY
);
896 FcStrFree ((FcChar8
*)cache_hashed
);
900 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
901 if (!strlen(name_buf
))
903 } while (strcmp (name_buf
, cache_file
) != 0);
911 /* read serialized state from the cache file */
913 FcDirCacheRead (FcFontSet
* set
, FcStrSet
* dirs
, const FcChar8
*dir
)
917 char *current_arch_machine_name
;
918 char candidate_arch_machine_name
[9+MACHINE_SIGNATURE_SIZE
];
919 off_t current_arch_start
= 0;
920 char subdirName
[FC_MAX_FILE_LEN
+ 1 + 12 + 1];
922 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
926 fd
= FcDirCacheOpen (cache_file
);
930 current_arch_machine_name
= FcCacheMachineSignature();
931 current_arch_start
= FcCacheSkipToArch(fd
,
932 current_arch_machine_name
,
934 if (current_arch_start
< 0)
937 lseek (fd
, current_arch_start
, SEEK_SET
);
938 if (FcCacheReadString (fd
, candidate_arch_machine_name
,
939 sizeof (candidate_arch_machine_name
)) == 0)
942 while (strlen(FcCacheReadString (fd
, subdirName
, sizeof (subdirName
))) > 0)
943 FcStrSetAdd (dirs
, (FcChar8
*)subdirName
);
945 if (!FcDirCacheConsume (fd
, (const char *)dir
, set
))
960 FcDirCacheConsume (int fd
, const char * dir
, FcFontSet
*set
)
963 void * current_dir_block
;
966 read(fd
, &metadata
, sizeof(FcCache
));
967 if (metadata
.magic
!= FC_CACHE_MAGIC
)
973 pos
= FcCacheNextOffset (lseek(fd
, 0, SEEK_CUR
));
974 current_dir_block
= mmap (0, metadata
.count
,
975 PROT_READ
, MAP_SHARED
, fd
, pos
);
976 if (current_dir_block
== MAP_FAILED
)
979 FcCacheAddBankDir (metadata
.bank
, dir
);
981 if (!FcFontSetUnserialize (&metadata
, set
, current_dir_block
))
988 FcDirCacheProduce (FcFontSet
*set
, FcCache
*metadata
)
990 void * current_dir_block
, * final_dir_block
;
991 static unsigned int rand_state
= 0;
992 int bank
, needed_bytes_no_align
;
995 rand_state
= time(0L);
996 bank
= rand_r(&rand_state
);
998 while (FcCacheHaveBank(bank
))
999 bank
= rand_r(&rand_state
);
1001 memset (metadata
, 0, sizeof(FcCache
));
1003 needed_bytes_no_align
= FcFontSetNeededBytes (set
);
1004 metadata
->count
= needed_bytes_no_align
+
1005 FcFontSetNeededBytesAlign ();
1006 metadata
->magic
= FC_CACHE_MAGIC
;
1007 metadata
->bank
= bank
;
1009 if (!needed_bytes_no_align
) /* not a failure, no fonts to write */
1011 /* no, you don't really need to write any bytes at all. */
1012 metadata
->count
= 0;
1016 current_dir_block
= malloc (metadata
->count
);
1017 if (!current_dir_block
)
1020 memset (current_dir_block
, 0, metadata
->count
);
1021 final_dir_block
= FcFontSetDistributeBytes (metadata
, current_dir_block
);
1023 if ((void *)((char *)current_dir_block
+metadata
->count
) < final_dir_block
)
1026 if (!FcFontSetSerialize (bank
, set
))
1029 return current_dir_block
;
1032 free (current_dir_block
);
1036 /* write serialized state to the cache file */
1038 FcDirCacheWrite (FcFontSet
*set
, FcStrSet
*dirs
, const FcChar8
*dir
)
1042 int fd
, fd_orig
, i
, dirs_count
;
1045 off_t current_arch_start
= 0, truncate_to
;
1046 char name_buf
[FC_MAX_FILE_LEN
];
1049 char *current_arch_machine_name
, * header
;
1050 void *current_dir_block
= 0;
1052 cache_file
= (char *)FcStrPlus (dir
, (FcChar8
*) "/" FC_DIR_CACHE_FILE
);
1056 /* Ensure that we're not trampling a cache for some other dir. */
1057 /* This is slightly different from FcDirCacheOpen, since it
1058 * needs the filename, not the file descriptor. */
1059 fd
= -1; collisions
= 0;
1062 cache_hashed
= FcDirCacheHashName (cache_file
, collisions
++);
1068 fd
= open(cache_hashed
, O_RDONLY
);
1071 FcCacheReadString (fd
, name_buf
, sizeof (name_buf
));
1074 if (!strlen(name_buf
))
1077 if (strcmp (name_buf
, cache_file
) != 0)
1081 current_dir_block
= FcDirCacheProduce (set
, &metadata
);
1083 if (metadata
.count
&& !current_dir_block
)
1086 if (FcDebug () & FC_DBG_CACHE
)
1087 printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file
);
1089 atomic
= FcAtomicCreate ((FcChar8
*)cache_hashed
);
1093 if (!FcAtomicLock (atomic
))
1095 /* Now try rewriting the original version of the file. */
1096 FcAtomicDestroy (atomic
);
1098 atomic
= FcAtomicCreate ((FcChar8
*)cache_file
);
1099 fd_orig
= open (cache_file
, O_RDONLY
);
1101 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1103 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1108 /* In all cases, try opening the real location of the cache file first. */
1109 /* (even if that's not atomic.) */
1110 fd_orig
= open (cache_file
, O_RDONLY
);
1112 fd_orig
= open((char *)FcAtomicOrigFile (atomic
), O_RDONLY
);
1114 fd
= open((char *)FcAtomicNewFile (atomic
), O_RDWR
| O_CREAT
, 0666);
1118 FcCacheWriteString (fd
, cache_file
);
1120 current_arch_machine_name
= FcCacheMachineSignature ();
1121 current_arch_start
= 0;
1124 current_arch_start
=
1125 FcCacheSkipToArch(fd_orig
, current_arch_machine_name
, FcFalse
);
1127 if (current_arch_start
< 0)
1128 current_arch_start
= FcCacheNextOffset (lseek(fd_orig
, 0, SEEK_END
));
1130 if (fd_orig
!= -1 && !FcCacheCopyOld(fd
, fd_orig
, current_arch_start
))
1136 current_arch_start
= lseek(fd
, 0, SEEK_CUR
);
1137 if (ftruncate (fd
, current_arch_start
) == -1)
1140 /* allocate space for subdir names in this block */
1142 for (i
= 0; i
< dirs
->size
; i
++)
1143 dirs_count
+= strlen((char *)dirs
->strs
[i
]) + 1;
1146 /* now write the address of the next offset */
1147 truncate_to
= FcCacheNextOffset (FcCacheNextOffset (current_arch_start
+ sizeof (FcCache
) + dirs_count
) + metadata
.count
) - current_arch_start
;
1148 header
= malloc (10 + strlen (current_arch_machine_name
));
1151 sprintf (header
, "%8x ", (int)truncate_to
);
1152 strcat (header
, current_arch_machine_name
);
1153 if (!FcCacheWriteString (fd
, header
))
1156 for (i
= 0; i
< dirs
->size
; i
++)
1157 FcCacheWriteString (fd
, (char *)dirs
->strs
[i
]);
1158 FcCacheWriteString (fd
, "");
1160 write (fd
, &metadata
, sizeof(FcCache
));
1163 lseek (fd
, FcCacheNextOffset (lseek(fd
, 0, SEEK_END
)), SEEK_SET
);
1164 write (fd
, current_dir_block
, metadata
.count
);
1165 free (current_dir_block
);
1168 /* this actually serves to pad out the cache file, if needed */
1169 if (ftruncate (fd
, current_arch_start
+ truncate_to
) == -1)
1173 if (!FcAtomicReplaceOrig(atomic
))
1175 FcStrFree ((FcChar8
*)cache_hashed
);
1176 FcAtomicUnlock (atomic
);
1177 FcAtomicDestroy (atomic
);
1185 FcAtomicUnlock (atomic
);
1187 FcAtomicDestroy (atomic
);
1189 FcStrFree ((FcChar8
*)cache_hashed
);
1191 unlink ((char *)cache_file
);
1193 if (current_dir_block
)
1194 free (current_dir_block
);
1200 FcCacheMachineSignature ()
1202 static char buf
[MACHINE_SIGNATURE_SIZE
];
1203 int32_t magic
= ENDIAN_TEST
;
1204 char * m
= (char *)&magic
;
1206 sprintf (buf
, "%2x%2x%2x%2x "
1207 "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
1208 "%4x %4x %4x %4x %4x %4x %4x %4x\n",
1209 m
[0], m
[1], m
[2], m
[3],
1210 (unsigned int)sizeof (char),
1211 (unsigned int)sizeof (char *),
1212 (unsigned int)sizeof (int),
1213 (unsigned int)sizeof (FcPattern
),
1214 (unsigned int)sizeof (FcPatternEltPtr
),
1215 (unsigned int)sizeof (struct _FcPatternElt
*),
1216 (unsigned int)sizeof (FcPatternElt
),
1217 (unsigned int)sizeof (FcObjectPtr
),
1218 (unsigned int)sizeof (FcValueListPtr
),
1219 (unsigned int)sizeof (FcValue
),
1220 (unsigned int)sizeof (FcValueBinding
),
1221 (unsigned int)sizeof (struct _FcValueList
*),
1222 (unsigned int)sizeof (FcCharSet
),
1223 (unsigned int)sizeof (FcCharLeaf
**),
1224 (unsigned int)sizeof (FcChar16
*),
1225 (unsigned int)sizeof (FcChar16
),
1226 (unsigned int)sizeof (FcCharLeaf
),
1227 (unsigned int)sizeof (FcChar32
),
1228 (unsigned int)sizeof (FcCache
),
1229 (unsigned int)sysconf(_SC_PAGESIZE
));
1234 static int banks_ptr
= 0, banks_alloc
= 0;
1235 int * _fcBankId
= 0, * _fcBankIdx
= 0;
1236 static const char ** bankDirs
= 0;
1239 FcCacheHaveBank (int bank
)
1243 if (bank
< FC_BANK_FIRST
)
1246 for (i
= 0; i
< banks_ptr
; i
++)
1247 if (_fcBankId
[i
] == bank
)
1254 FcCacheBankToIndexMTF (int bank
)
1258 for (i
= 0; i
< banks_ptr
; i
++)
1259 if (_fcBankId
[_fcBankIdx
[i
]] == bank
)
1261 int t
= _fcBankIdx
[i
];
1263 for (j
= i
; j
> 0; j
--)
1264 _fcBankIdx
[j
] = _fcBankIdx
[j
-1];
1269 if (banks_ptr
>= banks_alloc
)
1274 b
= realloc (_fcBankId
, (banks_alloc
+ 4) * sizeof(int));
1279 bidx
= realloc (_fcBankIdx
, (banks_alloc
+ 4) * sizeof(int));
1284 bds
= realloc (bankDirs
, (banks_alloc
+ 4) * sizeof (char *));
1293 _fcBankId
[i
] = bank
;
1299 FcCacheAddBankDir (int bank
, const char * dir
)
1301 int bi
= FcCacheBankToIndexMTF (bank
);
1306 bankDirs
[bi
] = (const char *)FcStrCopy ((FcChar8
*)dir
);
1310 FcCacheFindBankDir (int bank
)
1312 int bi
= FcCacheBankToIndex (bank
);
1313 return bankDirs
[bi
];
1317 * This code implements the MD5 message-digest algorithm.
1318 * The algorithm is due to Ron Rivest. This code was
1319 * written by Colin Plumb in 1993, no copyright is claimed.
1320 * This code is in the public domain; do with it what you wish.
1322 * Equivalent code is available from RSA Data Security, Inc.
1323 * This code has been tested against that, and is equivalent,
1324 * except that you don't need to include two pages of legalese
1327 * To compute the message digest of a chunk of bytes, declare an
1328 * MD5Context structure, pass it to MD5Init, call MD5Update as
1329 * needed on buffers full of bytes, and then call MD5Final, which
1330 * will fill a supplied 16-byte array with the digest.
1334 #define byteReverse(buf, len) /* Nothing */
1337 * Note: this code is harmless on little-endian machines.
1339 void byteReverse(unsigned char *buf
, unsigned longs
)
1343 t
= (FcChar32
) ((unsigned) buf
[3] << 8 | buf
[2]) << 16 |
1344 ((unsigned) buf
[1] << 8 | buf
[0]);
1345 *(FcChar32
*) buf
= t
;
1352 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
1353 * initialization constants.
1355 static void MD5Init(struct MD5Context
*ctx
)
1357 ctx
->buf
[0] = 0x67452301;
1358 ctx
->buf
[1] = 0xefcdab89;
1359 ctx
->buf
[2] = 0x98badcfe;
1360 ctx
->buf
[3] = 0x10325476;
1367 * Update context to reflect the concatenation of another buffer full
1370 static void MD5Update(struct MD5Context
*ctx
, unsigned char *buf
, unsigned len
)
1374 /* Update bitcount */
1377 if ((ctx
->bits
[0] = t
+ ((FcChar32
) len
<< 3)) < t
)
1378 ctx
->bits
[1]++; /* Carry from low to high */
1379 ctx
->bits
[1] += len
>> 29;
1381 t
= (t
>> 3) & 0x3f; /* Bytes already in shsInfo->data */
1383 /* Handle any leading odd-sized chunks */
1386 unsigned char *p
= (unsigned char *) ctx
->in
+ t
;
1390 memcpy(p
, buf
, len
);
1394 byteReverse(ctx
->in
, 16);
1395 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1399 /* Process data in 64-byte chunks */
1402 memcpy(ctx
->in
, buf
, 64);
1403 byteReverse(ctx
->in
, 16);
1404 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1409 /* Handle any remaining bytes of data. */
1411 memcpy(ctx
->in
, buf
, len
);
1415 * Final wrapup - pad to 64-byte boundary with the bit pattern
1416 * 1 0* (64-bit count of bits processed, MSB-first)
1418 static void MD5Final(unsigned char digest
[16], struct MD5Context
*ctx
)
1423 /* Compute number of bytes mod 64 */
1424 count
= (ctx
->bits
[0] >> 3) & 0x3F;
1426 /* Set the first char of padding to 0x80. This is safe since there is
1427 always at least one byte free */
1428 p
= ctx
->in
+ count
;
1431 /* Bytes of padding needed to make 64 bytes */
1432 count
= 64 - 1 - count
;
1434 /* Pad out to 56 mod 64 */
1436 /* Two lots of padding: Pad the first block to 64 bytes */
1437 memset(p
, 0, count
);
1438 byteReverse(ctx
->in
, 16);
1439 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1441 /* Now fill the next block with 56 bytes */
1442 memset(ctx
->in
, 0, 56);
1444 /* Pad block to 56 bytes */
1445 memset(p
, 0, count
- 8);
1447 byteReverse(ctx
->in
, 14);
1449 /* Append length in bits and transform */
1450 ((FcChar32
*) ctx
->in
)[14] = ctx
->bits
[0];
1451 ((FcChar32
*) ctx
->in
)[15] = ctx
->bits
[1];
1453 MD5Transform(ctx
->buf
, (FcChar32
*) ctx
->in
);
1454 byteReverse((unsigned char *) ctx
->buf
, 4);
1455 memcpy(digest
, ctx
->buf
, 16);
1456 memset(ctx
, 0, sizeof(ctx
)); /* In case it's sensitive */
1460 /* The four core functions - F1 is optimized somewhat */
1462 /* #define F1(x, y, z) (x & y | ~x & z) */
1463 #define F1(x, y, z) (z ^ (x & (y ^ z)))
1464 #define F2(x, y, z) F1(z, x, y)
1465 #define F3(x, y, z) (x ^ y ^ z)
1466 #define F4(x, y, z) (y ^ (x | ~z))
1468 /* This is the central step in the MD5 algorithm. */
1469 #define MD5STEP(f, w, x, y, z, data, s) \
1470 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
1473 * The core of the MD5 algorithm, this alters an existing MD5 hash to
1474 * reflect the addition of 16 longwords of new data. MD5Update blocks
1475 * the data and converts bytes into longwords for this routine.
1477 static void MD5Transform(FcChar32 buf
[4], FcChar32 in
[16])
1479 register FcChar32 a
, b
, c
, d
;
1486 MD5STEP(F1
, a
, b
, c
, d
, in
[0] + 0xd76aa478, 7);
1487 MD5STEP(F1
, d
, a
, b
, c
, in
[1] + 0xe8c7b756, 12);
1488 MD5STEP(F1
, c
, d
, a
, b
, in
[2] + 0x242070db, 17);
1489 MD5STEP(F1
, b
, c
, d
, a
, in
[3] + 0xc1bdceee, 22);
1490 MD5STEP(F1
, a
, b
, c
, d
, in
[4] + 0xf57c0faf, 7);
1491 MD5STEP(F1
, d
, a
, b
, c
, in
[5] + 0x4787c62a, 12);
1492 MD5STEP(F1
, c
, d
, a
, b
, in
[6] + 0xa8304613, 17);
1493 MD5STEP(F1
, b
, c
, d
, a
, in
[7] + 0xfd469501, 22);
1494 MD5STEP(F1
, a
, b
, c
, d
, in
[8] + 0x698098d8, 7);
1495 MD5STEP(F1
, d
, a
, b
, c
, in
[9] + 0x8b44f7af, 12);
1496 MD5STEP(F1
, c
, d
, a
, b
, in
[10] + 0xffff5bb1, 17);
1497 MD5STEP(F1
, b
, c
, d
, a
, in
[11] + 0x895cd7be, 22);
1498 MD5STEP(F1
, a
, b
, c
, d
, in
[12] + 0x6b901122, 7);
1499 MD5STEP(F1
, d
, a
, b
, c
, in
[13] + 0xfd987193, 12);
1500 MD5STEP(F1
, c
, d
, a
, b
, in
[14] + 0xa679438e, 17);
1501 MD5STEP(F1
, b
, c
, d
, a
, in
[15] + 0x49b40821, 22);
1503 MD5STEP(F2
, a
, b
, c
, d
, in
[1] + 0xf61e2562, 5);
1504 MD5STEP(F2
, d
, a
, b
, c
, in
[6] + 0xc040b340, 9);
1505 MD5STEP(F2
, c
, d
, a
, b
, in
[11] + 0x265e5a51, 14);
1506 MD5STEP(F2
, b
, c
, d
, a
, in
[0] + 0xe9b6c7aa, 20);
1507 MD5STEP(F2
, a
, b
, c
, d
, in
[5] + 0xd62f105d, 5);
1508 MD5STEP(F2
, d
, a
, b
, c
, in
[10] + 0x02441453, 9);
1509 MD5STEP(F2
, c
, d
, a
, b
, in
[15] + 0xd8a1e681, 14);
1510 MD5STEP(F2
, b
, c
, d
, a
, in
[4] + 0xe7d3fbc8, 20);
1511 MD5STEP(F2
, a
, b
, c
, d
, in
[9] + 0x21e1cde6, 5);
1512 MD5STEP(F2
, d
, a
, b
, c
, in
[14] + 0xc33707d6, 9);
1513 MD5STEP(F2
, c
, d
, a
, b
, in
[3] + 0xf4d50d87, 14);
1514 MD5STEP(F2
, b
, c
, d
, a
, in
[8] + 0x455a14ed, 20);
1515 MD5STEP(F2
, a
, b
, c
, d
, in
[13] + 0xa9e3e905, 5);
1516 MD5STEP(F2
, d
, a
, b
, c
, in
[2] + 0xfcefa3f8, 9);
1517 MD5STEP(F2
, c
, d
, a
, b
, in
[7] + 0x676f02d9, 14);
1518 MD5STEP(F2
, b
, c
, d
, a
, in
[12] + 0x8d2a4c8a, 20);
1520 MD5STEP(F3
, a
, b
, c
, d
, in
[5] + 0xfffa3942, 4);
1521 MD5STEP(F3
, d
, a
, b
, c
, in
[8] + 0x8771f681, 11);
1522 MD5STEP(F3
, c
, d
, a
, b
, in
[11] + 0x6d9d6122, 16);
1523 MD5STEP(F3
, b
, c
, d
, a
, in
[14] + 0xfde5380c, 23);
1524 MD5STEP(F3
, a
, b
, c
, d
, in
[1] + 0xa4beea44, 4);
1525 MD5STEP(F3
, d
, a
, b
, c
, in
[4] + 0x4bdecfa9, 11);
1526 MD5STEP(F3
, c
, d
, a
, b
, in
[7] + 0xf6bb4b60, 16);
1527 MD5STEP(F3
, b
, c
, d
, a
, in
[10] + 0xbebfbc70, 23);
1528 MD5STEP(F3
, a
, b
, c
, d
, in
[13] + 0x289b7ec6, 4);
1529 MD5STEP(F3
, d
, a
, b
, c
, in
[0] + 0xeaa127fa, 11);
1530 MD5STEP(F3
, c
, d
, a
, b
, in
[3] + 0xd4ef3085, 16);
1531 MD5STEP(F3
, b
, c
, d
, a
, in
[6] + 0x04881d05, 23);
1532 MD5STEP(F3
, a
, b
, c
, d
, in
[9] + 0xd9d4d039, 4);
1533 MD5STEP(F3
, d
, a
, b
, c
, in
[12] + 0xe6db99e5, 11);
1534 MD5STEP(F3
, c
, d
, a
, b
, in
[15] + 0x1fa27cf8, 16);
1535 MD5STEP(F3
, b
, c
, d
, a
, in
[2] + 0xc4ac5665, 23);
1537 MD5STEP(F4
, a
, b
, c
, d
, in
[0] + 0xf4292244, 6);
1538 MD5STEP(F4
, d
, a
, b
, c
, in
[7] + 0x432aff97, 10);
1539 MD5STEP(F4
, c
, d
, a
, b
, in
[14] + 0xab9423a7, 15);
1540 MD5STEP(F4
, b
, c
, d
, a
, in
[5] + 0xfc93a039, 21);
1541 MD5STEP(F4
, a
, b
, c
, d
, in
[12] + 0x655b59c3, 6);
1542 MD5STEP(F4
, d
, a
, b
, c
, in
[3] + 0x8f0ccc92, 10);
1543 MD5STEP(F4
, c
, d
, a
, b
, in
[10] + 0xffeff47d, 15);
1544 MD5STEP(F4
, b
, c
, d
, a
, in
[1] + 0x85845dd1, 21);
1545 MD5STEP(F4
, a
, b
, c
, d
, in
[8] + 0x6fa87e4f, 6);
1546 MD5STEP(F4
, d
, a
, b
, c
, in
[15] + 0xfe2ce6e0, 10);
1547 MD5STEP(F4
, c
, d
, a
, b
, in
[6] + 0xa3014314, 15);
1548 MD5STEP(F4
, b
, c
, d
, a
, in
[13] + 0x4e0811a1, 21);
1549 MD5STEP(F4
, a
, b
, c
, d
, in
[4] + 0xf7537e82, 6);
1550 MD5STEP(F4
, d
, a
, b
, c
, in
[11] + 0xbd3af235, 10);
1551 MD5STEP(F4
, c
, d
, a
, b
, in
[2] + 0x2ad7d2bb, 15);
1552 MD5STEP(F4
, b
, c
, d
, a
, in
[9] + 0xeb86d391, 21);