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1 | /* | |
2 | * $RCSId: xc/lib/fontconfig/src/fccache.c,v 1.12 2002/08/22 07:36:44 keithp Exp $ | |
3 | * | |
4 | * Copyright © 2000 Keith Packard | |
5 | * Copyright © 2005 Patrick Lam | |
6 | * | |
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. | |
16 | * | |
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. | |
24 | */ | |
25 | ||
26 | #include <fcntl.h> | |
27 | #include <dirent.h> | |
28 | #include <string.h> | |
29 | #include <sys/types.h> | |
30 | #include "fcint.h" | |
31 | #if defined(HAVE_MMAP) || defined(__CYGWIN__) | |
32 | # include <unistd.h> | |
33 | # include <sys/mman.h> | |
34 | #elif defined(_WIN32) | |
35 | # include <windows.h> | |
36 | #endif | |
37 | ||
38 | #define ENDIAN_TEST 0x12345678 | |
39 | #define MACHINE_SIGNATURE_SIZE (9 + 5*20 + 1) | |
40 | /* for when we don't have sysconf: */ | |
41 | #define FC_HARDCODED_PAGESIZE 8192 | |
42 | ||
43 | #ifndef O_BINARY | |
44 | #define O_BINARY 0 | |
45 | #endif | |
46 | ||
47 | static int | |
48 | FcDirCacheOpen (const FcChar8 * dir); | |
49 | ||
50 | static char * | |
51 | FcDirCacheHashName (char * cache_file, int collisions); | |
52 | ||
53 | static off_t | |
54 | FcCacheSkipToArch (int fd, const char * arch); | |
55 | ||
56 | static FcBool | |
57 | FcCacheCopyOld (int fd, int fd_orig, off_t start); | |
58 | ||
59 | static void * | |
60 | FcDirCacheProduce (FcFontSet *set, FcCache * metadata); | |
61 | ||
62 | static FcBool | |
63 | FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config); | |
64 | ||
65 | static int | |
66 | FcCacheNextOffset(off_t w); | |
67 | ||
68 | static char * | |
69 | FcCacheMachineSignature (void); | |
70 | ||
71 | static FcBool | |
72 | FcCacheHaveBank (int bank); | |
73 | ||
74 | static void | |
75 | FcCacheAddBankDir (int bank, const char * dir); | |
76 | ||
77 | struct MD5Context { | |
78 | FcChar32 buf[4]; | |
79 | FcChar32 bits[2]; | |
80 | unsigned char in[64]; | |
81 | }; | |
82 | ||
83 | static void MD5Init(struct MD5Context *ctx); | |
84 | static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len); | |
85 | static void MD5Final(unsigned char digest[16], struct MD5Context *ctx); | |
86 | static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]); | |
87 | ||
88 | #define FC_DBG_CACHE_REF 1024 | |
89 | ||
90 | static char * | |
91 | FcCacheReadString (int fd, char *dest, int len) | |
92 | { | |
93 | int size; | |
94 | int slen; | |
95 | ||
96 | if (len == 0) | |
97 | return 0; | |
98 | ||
99 | size = read (fd, dest, len-1); | |
100 | ||
101 | if (size > 0) | |
102 | { | |
103 | dest[size] = '\0'; | |
104 | slen = strlen (dest); | |
105 | ||
106 | lseek (fd, slen - size + 1, SEEK_CUR); | |
107 | return slen < len ? dest : 0; | |
108 | } | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static void | |
114 | FcCacheSkipString (int fd) | |
115 | { | |
116 | char buf[256]; | |
117 | int size; | |
118 | int slen; | |
119 | ||
120 | while ( (size = read (fd, buf, sizeof (buf)-1)) > 0) | |
121 | { | |
122 | buf [size] = '\0'; | |
123 | slen = strlen (buf); | |
124 | if (slen < size) | |
125 | { | |
126 | lseek (fd, slen - size + 1, SEEK_CUR); | |
127 | return; | |
128 | } | |
129 | } | |
130 | } | |
131 | ||
132 | static FcBool | |
133 | FcCacheWriteString (int fd, const char *chars) | |
134 | { | |
135 | if (write (fd, chars, strlen(chars)+1) != strlen(chars)+1) | |
136 | return FcFalse; | |
137 | return FcTrue; | |
138 | } | |
139 | ||
140 | static void | |
141 | FcGlobalCacheDirDestroy (FcGlobalCacheDir *d) | |
142 | { | |
143 | FcStrSetDestroy (d->subdirs); | |
144 | FcMemFree (FC_MEM_STRING, strlen (d->name)+1); | |
145 | free (d->name); | |
146 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCacheDir)); | |
147 | free (d); | |
148 | } | |
149 | ||
150 | FcGlobalCache * | |
151 | FcGlobalCacheCreate (void) | |
152 | { | |
153 | FcGlobalCache *cache; | |
154 | ||
155 | cache = malloc (sizeof (FcGlobalCache)); | |
156 | if (!cache) | |
157 | return 0; | |
158 | FcMemAlloc (FC_MEM_CACHE, sizeof (FcGlobalCache)); | |
159 | cache->dirs = 0; | |
160 | cache->updated = FcFalse; | |
161 | cache->fd = -1; | |
162 | return cache; | |
163 | } | |
164 | ||
165 | void | |
166 | FcGlobalCacheDestroy (FcGlobalCache *cache) | |
167 | { | |
168 | FcGlobalCacheDir *d, *next; | |
169 | ||
170 | for (d = cache->dirs; d; d = next) | |
171 | { | |
172 | next = d->next; | |
173 | FcGlobalCacheDirDestroy (d); | |
174 | } | |
175 | FcMemFree (FC_MEM_CACHE, sizeof (FcGlobalCache)); | |
176 | free (cache); | |
177 | } | |
178 | ||
179 | void | |
180 | FcGlobalCacheLoad (FcGlobalCache *cache, | |
181 | FcStrSet *staleDirs, | |
182 | const FcChar8 *cache_file, | |
183 | FcConfig *config) | |
184 | { | |
185 | char name_buf[FC_MAX_FILE_LEN]; | |
186 | FcGlobalCacheDir *d, *next; | |
187 | FcFileTime config_time = FcConfigModifiedTime (config); | |
188 | char * current_arch_machine_name; | |
189 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; | |
190 | off_t current_arch_start; | |
191 | ||
192 | struct stat cache_stat, dir_stat; | |
193 | char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; | |
194 | ||
195 | if (stat ((char *) cache_file, &cache_stat) < 0) | |
196 | return; | |
197 | ||
198 | cache->fd = open ((char *) cache_file, O_RDONLY | O_BINARY); | |
199 | if (cache->fd == -1) | |
200 | return; | |
201 | ||
202 | cache->updated = FcFalse; | |
203 | ||
204 | if (!FcCacheReadString (cache->fd, name_buf, sizeof (name_buf))) | |
205 | goto bail_and_destroy; | |
206 | if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) != 0) | |
207 | goto bail_and_destroy; | |
208 | ||
209 | current_arch_machine_name = FcCacheMachineSignature (); | |
210 | current_arch_start = FcCacheSkipToArch(cache->fd, | |
211 | current_arch_machine_name); | |
212 | if (current_arch_start < 0) | |
213 | goto bail1; | |
214 | ||
215 | lseek (cache->fd, current_arch_start, SEEK_SET); | |
216 | if (!FcCacheReadString (cache->fd, candidate_arch_machine_name, | |
217 | sizeof (candidate_arch_machine_name))) | |
218 | goto bail_and_destroy; | |
219 | if (strlen(candidate_arch_machine_name) == 0) | |
220 | goto bail_and_destroy; | |
221 | ||
222 | while (1) | |
223 | { | |
224 | off_t targ; | |
225 | ||
226 | if (!FcCacheReadString (cache->fd, name_buf, sizeof (name_buf)) || | |
227 | !strlen(name_buf)) | |
228 | break; | |
229 | ||
230 | /* Directory must be older than the global cache file; also | |
231 | cache must be newer than the config file. */ | |
232 | if (stat ((char *) name_buf, &dir_stat) < 0 || | |
233 | dir_stat.st_mtime > cache_stat.st_mtime || | |
234 | (config_time.set && cache_stat.st_mtime < config_time.time)) | |
235 | { | |
236 | FcCache md; | |
237 | off_t off; | |
238 | ||
239 | FcStrSetAdd (staleDirs, (FcChar8 *)name_buf); | |
240 | ||
241 | /* skip subdirs */ | |
242 | while (FcCacheReadString (cache->fd, subdirName, | |
243 | sizeof (subdirName)) && | |
244 | strlen (subdirName)) | |
245 | ; | |
246 | ||
247 | if (read (cache->fd, &md, sizeof (FcCache)) != sizeof(FcCache)) | |
248 | { | |
249 | perror ("read metadata"); | |
250 | goto bail1; | |
251 | } | |
252 | off = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + md.count; | |
253 | if (lseek (cache->fd, off, SEEK_SET) != off) | |
254 | { | |
255 | perror ("lseek"); | |
256 | goto bail1; | |
257 | } | |
258 | continue; | |
259 | } | |
260 | ||
261 | d = malloc (sizeof (FcGlobalCacheDir)); | |
262 | if (!d) | |
263 | goto bail1; | |
264 | ||
265 | d->next = cache->dirs; | |
266 | cache->dirs = d; | |
267 | ||
268 | d->name = (char *)FcStrCopy ((FcChar8 *)name_buf); | |
269 | d->ent = 0; | |
270 | d->state = FcGCDirFileRead; | |
271 | ||
272 | d->subdirs = FcStrSetCreate(); | |
273 | do | |
274 | { | |
275 | if (!FcCacheReadString (cache->fd, subdirName, | |
276 | sizeof (subdirName)) || | |
277 | !strlen (subdirName)) | |
278 | break; | |
279 | FcStrSetAdd (d->subdirs, (FcChar8 *)subdirName); | |
280 | } while (1); | |
281 | ||
282 | d->offset = lseek (cache->fd, 0, SEEK_CUR); | |
283 | if (read (cache->fd, &d->metadata, sizeof (FcCache)) != sizeof (FcCache)) | |
284 | goto bail1; | |
285 | targ = FcCacheNextOffset (lseek(cache->fd, 0, SEEK_CUR)) + d->metadata.count; | |
286 | if (lseek (cache->fd, targ, SEEK_SET) != targ) | |
287 | goto bail1; | |
288 | } | |
289 | return; | |
290 | ||
291 | bail1: | |
292 | for (d = cache->dirs; d; d = next) | |
293 | { | |
294 | next = d->next; | |
295 | free (d); | |
296 | } | |
297 | cache->dirs = 0; | |
298 | ||
299 | close (cache->fd); | |
300 | cache->fd = -1; | |
301 | return; | |
302 | ||
303 | bail_and_destroy: | |
304 | close (cache->fd); | |
305 | cache->fd = -1; | |
306 | ||
307 | if (stat ((char *) cache_file, &cache_stat) == 0) | |
308 | unlink ((char *)cache_file); | |
309 | ||
310 | return; | |
311 | ||
312 | } | |
313 | ||
314 | FcBool | |
315 | FcGlobalCacheReadDir (FcFontSet *set, FcStrSet *dirs, FcGlobalCache * cache, const char *dir, FcConfig *config) | |
316 | { | |
317 | FcGlobalCacheDir *d; | |
318 | int i; | |
319 | ||
320 | if (cache->fd == -1) | |
321 | return FcFalse; | |
322 | ||
323 | if (config) | |
324 | if (!(dir = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)dir))) | |
325 | return FcFalse; /* non-existing directory */ | |
326 | ||
327 | for (d = cache->dirs; d; d = d->next) | |
328 | { | |
329 | if (strcmp (d->name, dir) == 0) | |
330 | { | |
331 | if (d->state == FcGCDirDisabled) | |
332 | return FcFalse; | |
333 | ||
334 | if (d->state == FcGCDirFileRead) | |
335 | { | |
336 | lseek (cache->fd, d->offset, SEEK_SET); | |
337 | if (!FcDirCacheConsume (cache->fd, d->name, set, config)) | |
338 | return FcFalse; | |
339 | ||
340 | for (i = 0; i < d->subdirs->num; i++) | |
341 | FcStrSetAdd (dirs, (FcChar8 *)d->subdirs->strs[i]); | |
342 | ||
343 | d->state = FcGCDirConsumed; | |
344 | } | |
345 | return FcTrue; | |
346 | } | |
347 | } | |
348 | ||
349 | return FcFalse; | |
350 | } | |
351 | ||
352 | static FcGlobalCacheDir * | |
353 | FcGlobalCacheDirFind (FcGlobalCache *cache, const char *name) | |
354 | { | |
355 | FcGlobalCacheDir * d; | |
356 | ||
357 | if (!cache || !name) | |
358 | return NULL; | |
359 | ||
360 | for (d = cache->dirs; d; d = d->next) | |
361 | if (strcmp((const char *)d->name, (const char *)name) == 0) | |
362 | return d; | |
363 | ||
364 | return NULL; | |
365 | } | |
366 | ||
367 | FcBool | |
368 | FcGlobalCacheUpdate (FcGlobalCache *cache, | |
369 | FcStrSet *dirs, | |
370 | const char *orig_name, | |
371 | FcFontSet *set, | |
372 | FcConfig *config) | |
373 | { | |
374 | FcGlobalCacheDir *d; | |
375 | int i; | |
376 | const char *name; | |
377 | ||
378 | name = (char *)FcConfigNormalizeFontDir (config, (FcChar8 *)orig_name); | |
379 | if (!name) | |
380 | { | |
381 | fprintf(stderr, "Invalid directory name %s\n", orig_name); | |
382 | return FcFalse; | |
383 | } | |
384 | ||
385 | d = FcGlobalCacheDirFind (cache, name); | |
386 | ||
387 | if (!d) | |
388 | { | |
389 | d = malloc (sizeof (FcGlobalCacheDir)); | |
390 | if (!d) | |
391 | return FcFalse; | |
392 | d->next = cache->dirs; | |
393 | cache->dirs = d; | |
394 | } else { | |
395 | /* free old resources */ | |
396 | FcStrFree ((FcChar8 *)d->name); | |
397 | free (d->ent); | |
398 | FcStrSetDestroy (d->subdirs); | |
399 | } | |
400 | ||
401 | cache->updated = FcTrue; | |
402 | ||
403 | d->name = (char *)FcStrCopy ((FcChar8 *)name); | |
404 | d->ent = FcDirCacheProduce (set, &d->metadata); | |
405 | d->offset = 0; | |
406 | d->subdirs = FcStrSetCreate(); | |
407 | d->state = FcGCDirUpdated; | |
408 | for (i = 0; i < dirs->num; i++) | |
409 | FcStrSetAdd (d->subdirs, dirs->strs[i]); | |
410 | return FcTrue; | |
411 | } | |
412 | ||
413 | FcBool | |
414 | FcGlobalCacheSave (FcGlobalCache *cache, | |
415 | const FcChar8 *cache_file, | |
416 | FcConfig *config) | |
417 | { | |
418 | int fd, fd_orig; | |
419 | FcGlobalCacheDir *dir; | |
420 | FcAtomic *atomic; | |
421 | off_t current_arch_start = 0, truncate_to; | |
422 | char * current_arch_machine_name, * header; | |
423 | ||
424 | if (!cache->updated) | |
425 | return FcTrue; | |
426 | ||
427 | #if defined (HAVE_GETUID) && defined (HAVE_GETEUID) | |
428 | /* Set-UID programs can't safely update the cache */ | |
429 | if (getuid () != geteuid ()) | |
430 | return FcFalse; | |
431 | #endif | |
432 | ||
433 | atomic = FcAtomicCreate (cache_file); | |
434 | if (!atomic) | |
435 | return FcFalse; | |
436 | ||
437 | if (!FcAtomicLock (atomic)) | |
438 | goto bail1; | |
439 | fd = open ((char *) FcAtomicNewFile(atomic), O_RDWR | O_CREAT | O_BINARY, | |
440 | S_IRUSR | S_IWUSR); | |
441 | if (fd == -1) | |
442 | goto bail2; | |
443 | FcCacheWriteString (fd, FC_GLOBAL_MAGIC_COOKIE); | |
444 | ||
445 | fd_orig = open ((char *) FcAtomicOrigFile(atomic), O_RDONLY | O_BINARY); | |
446 | ||
447 | current_arch_machine_name = FcCacheMachineSignature (); | |
448 | if (fd_orig == -1) | |
449 | current_arch_start = 0; | |
450 | else | |
451 | current_arch_start = FcCacheSkipToArch (fd_orig, | |
452 | current_arch_machine_name); | |
453 | ||
454 | if (current_arch_start < 0) | |
455 | { | |
456 | off_t i = lseek(fd_orig, 0, SEEK_END); | |
457 | if (i < strlen (FC_GLOBAL_MAGIC_COOKIE)+1) | |
458 | i = strlen (FC_GLOBAL_MAGIC_COOKIE)+1; | |
459 | current_arch_start = FcCacheNextOffset (i); | |
460 | } | |
461 | ||
462 | if (!FcCacheCopyOld(fd, fd_orig, current_arch_start)) | |
463 | goto bail3; | |
464 | ||
465 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
466 | #if defined (HAVE_FTRUNCATE) | |
467 | if (ftruncate (fd, current_arch_start) == -1) | |
468 | goto bail3; | |
469 | #else | |
470 | #if defined (HAVE_CHSIZE) | |
471 | if (chsize (fd, current_arch_start) == -1) | |
472 | goto bail3; | |
473 | #else | |
474 | goto bail3; | |
475 | #endif | |
476 | #endif | |
477 | ||
478 | header = malloc (10 + strlen (current_arch_machine_name)); | |
479 | if (!header) | |
480 | goto bail3; | |
481 | ||
482 | truncate_to = current_arch_start + strlen(current_arch_machine_name) + 11; | |
483 | for (dir = cache->dirs; dir; dir = dir->next) | |
484 | { | |
485 | int i; | |
486 | ||
487 | if (dir->state == FcGCDirDisabled) | |
488 | continue; | |
489 | truncate_to += strlen(dir->name) + 1; | |
490 | truncate_to += sizeof (FcCache); | |
491 | truncate_to = FcCacheNextOffset (truncate_to); | |
492 | truncate_to += dir->metadata.count; | |
493 | ||
494 | for (i = 0; i < dir->subdirs->size; i++) | |
495 | truncate_to += strlen((char *)dir->subdirs->strs[i]) + 1; | |
496 | truncate_to ++; | |
497 | } | |
498 | truncate_to -= current_arch_start; | |
499 | ||
500 | sprintf (header, "%8x ", (int)truncate_to); | |
501 | strcat (header, current_arch_machine_name); | |
502 | if (!FcCacheWriteString (fd, header)) | |
503 | goto bail4; | |
504 | ||
505 | free (header); | |
506 | ||
507 | for (dir = cache->dirs; dir; dir = dir->next) | |
508 | { | |
509 | int i; | |
510 | const char * d; | |
511 | off_t off; | |
512 | ||
513 | if (!dir->name || dir->state == FcGCDirDisabled) | |
514 | continue; | |
515 | d = (const char *)FcConfigNormalizeFontDir (config, (const FcChar8 *)dir->name); | |
516 | if (!d) | |
517 | continue; | |
518 | ||
519 | if (dir->metadata.count && !dir->ent) | |
520 | { | |
521 | if (dir->state == FcGCDirUpdated || fd_orig < 0) | |
522 | { | |
523 | fprintf(stderr, "Invalid metadata entry for %s, skipping...\n", d); | |
524 | continue; | |
525 | } | |
526 | /* copy the old content */ | |
527 | dir->ent = malloc (dir->metadata.count); | |
528 | if (!dir->ent) | |
529 | { | |
530 | perror("malloc error"); | |
531 | continue; | |
532 | } | |
533 | off = FcCacheNextOffset (dir->offset + sizeof(FcCache)); | |
534 | if (lseek (fd_orig, off, SEEK_SET) != off) | |
535 | { | |
536 | perror("lseek"); | |
537 | free(dir->ent); | |
538 | continue; | |
539 | } | |
540 | if (read (fd_orig, dir->ent, dir->metadata.count) | |
541 | != dir->metadata.count) | |
542 | { | |
543 | perror("read"); | |
544 | free(dir->ent); | |
545 | continue; | |
546 | } | |
547 | } | |
548 | ||
549 | FcCacheWriteString (fd, d); | |
550 | ||
551 | for (i = 0; i < dir->subdirs->size; i++) | |
552 | FcCacheWriteString (fd, (char *)dir->subdirs->strs[i]); | |
553 | FcCacheWriteString (fd, ""); | |
554 | ||
555 | if (write (fd, &dir->metadata, sizeof(FcCache)) != sizeof(FcCache)) | |
556 | { | |
557 | perror ("write metadata"); | |
558 | free (dir->ent); | |
559 | continue; | |
560 | } | |
561 | off = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); | |
562 | if (lseek (fd, off, SEEK_SET) != off) | |
563 | { | |
564 | perror ("lseek"); | |
565 | free (dir->ent); | |
566 | continue; | |
567 | } | |
568 | if (dir->metadata.count) | |
569 | { | |
570 | if (write (fd, dir->ent, dir->metadata.count) != dir->metadata.count) | |
571 | { | |
572 | perror ("write dirent"); | |
573 | free (dir->ent); | |
574 | continue; | |
575 | } | |
576 | } | |
577 | free (dir->ent); | |
578 | } | |
579 | FcCacheWriteString (fd, ""); | |
580 | ||
581 | if (close (fd) == -1) | |
582 | goto bail25; | |
583 | ||
584 | close (fd_orig); | |
585 | fd_orig = -1; | |
586 | ||
587 | if (!FcAtomicReplaceOrig (atomic)) | |
588 | goto bail25; | |
589 | ||
590 | FcAtomicUnlock (atomic); | |
591 | FcAtomicDestroy (atomic); | |
592 | ||
593 | cache->updated = FcFalse; | |
594 | return FcTrue; | |
595 | ||
596 | bail4: | |
597 | free (header); | |
598 | bail3: | |
599 | if (fd_orig != -1) | |
600 | close (fd_orig); | |
601 | ||
602 | close (fd); | |
603 | bail25: | |
604 | FcAtomicDeleteNew (atomic); | |
605 | bail2: | |
606 | FcAtomicUnlock (atomic); | |
607 | bail1: | |
608 | FcAtomicDestroy (atomic); | |
609 | return FcFalse; | |
610 | } | |
611 | ||
612 | /* | |
613 | * Find the next presumably-mmapable offset after the supplied file | |
614 | * position. | |
615 | */ | |
616 | static int | |
617 | FcCacheNextOffset(off_t w) | |
618 | { | |
619 | static long pagesize = -1; | |
620 | ||
621 | if (w == -1) | |
622 | return w; | |
623 | ||
624 | if (pagesize == -1) | |
625 | #if defined (HAVE_SYSCONF) | |
626 | pagesize = sysconf(_SC_PAGESIZE); | |
627 | #else | |
628 | pagesize = FC_HARDCODED_PAGESIZE; | |
629 | #endif | |
630 | if (w % pagesize == 0) | |
631 | return w; | |
632 | else | |
633 | return ((w / pagesize)+1)*pagesize; | |
634 | } | |
635 | ||
636 | /* return the address of the segment for the provided arch, | |
637 | * or -1 if arch not found */ | |
638 | static off_t | |
639 | FcCacheSkipToArch (int fd, const char * arch) | |
640 | { | |
641 | char candidate_arch_machine_name_count[MACHINE_SIGNATURE_SIZE + 9]; | |
642 | char * candidate_arch; | |
643 | off_t current_arch_start = 0; | |
644 | ||
645 | lseek (fd, 0, SEEK_SET); | |
646 | FcCacheSkipString (fd); | |
647 | current_arch_start = lseek (fd, 0, SEEK_CUR); | |
648 | ||
649 | /* skip arches that are not the current arch */ | |
650 | while (1) | |
651 | { | |
652 | long bs; | |
653 | ||
654 | if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start) | |
655 | return -1; | |
656 | ||
657 | if (FcCacheReadString (fd, candidate_arch_machine_name_count, | |
658 | sizeof (candidate_arch_machine_name_count)) == 0) | |
659 | return -1; | |
660 | if (!strlen(candidate_arch_machine_name_count)) | |
661 | return -1; | |
662 | bs = strtol(candidate_arch_machine_name_count, &candidate_arch, 16); | |
663 | ||
664 | /* count = 0 should probably be distinguished from the !bs condition */ | |
665 | if (!bs || bs < strlen (candidate_arch_machine_name_count)) | |
666 | return -1; | |
667 | ||
668 | candidate_arch++; /* skip leading space */ | |
669 | ||
670 | if (strcmp (candidate_arch, arch)==0) | |
671 | return current_arch_start; | |
672 | current_arch_start += bs; | |
673 | current_arch_start = FcCacheNextOffset (current_arch_start); | |
674 | } | |
675 | } | |
676 | ||
677 | /* Cuts out the segment at the file pointer (moves everything else | |
678 | * down to cover it), and leaves the file pointer at the end of the | |
679 | * file. */ | |
680 | static FcBool | |
681 | FcCacheCopyOld (int fd, int fd_orig, off_t start) | |
682 | { | |
683 | char * buf = malloc (8192); | |
684 | char candidate_arch_machine_name[MACHINE_SIGNATURE_SIZE + 9]; | |
685 | long bs; | |
686 | int c, bytes_skipped; | |
687 | off_t loc; | |
688 | ||
689 | if (!buf) | |
690 | return FcFalse; | |
691 | ||
692 | loc = 0; | |
693 | lseek (fd, 0, SEEK_SET); lseek (fd_orig, 0, SEEK_SET); | |
694 | FcCacheSkipString (fd); FcCacheSkipString (fd_orig); | |
695 | do | |
696 | { | |
697 | int b = 8192; | |
698 | if (loc + b > start) | |
699 | b = start - loc; | |
700 | ||
701 | if ((c = read (fd_orig, buf, b)) <= 0) | |
702 | break; | |
703 | if (write (fd, buf, c) < 0) | |
704 | goto bail; | |
705 | ||
706 | loc += c; | |
707 | } | |
708 | while (c > 0); | |
709 | ||
710 | lseek (fd, start, SEEK_SET); | |
711 | if (FcCacheReadString (fd, candidate_arch_machine_name, | |
712 | sizeof (candidate_arch_machine_name)) == 0) | |
713 | goto done; | |
714 | if (!strlen(candidate_arch_machine_name)) | |
715 | goto done; | |
716 | ||
717 | bs = strtol(candidate_arch_machine_name, 0, 16); | |
718 | if (bs == 0) | |
719 | goto done; | |
720 | ||
721 | bytes_skipped = 0; | |
722 | do | |
723 | { | |
724 | lseek (fd, start+bs+bytes_skipped, SEEK_SET); | |
725 | if ((c = read (fd, buf, 8192)) <= 0) | |
726 | break; | |
727 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
728 | if (write (fd, buf, c) < 0) | |
729 | goto bail; | |
730 | bytes_skipped += c; | |
731 | } | |
732 | while (c > 0); | |
733 | lseek (fd, start+bytes_skipped, SEEK_SET); | |
734 | ||
735 | done: | |
736 | free (buf); | |
737 | return FcTrue; | |
738 | ||
739 | bail: | |
740 | free (buf); | |
741 | return FcFalse; | |
742 | } | |
743 | ||
744 | /* Does not check that the cache has the appropriate arch section. */ | |
745 | /* Also, this can be fooled if the original location has a stale | |
746 | * cache, and the hashed location has an up-to-date cache. Oh well, | |
747 | * sucks to be you in that case! */ | |
748 | FcBool | |
749 | FcDirCacheValid (const FcChar8 *dir) | |
750 | { | |
751 | struct stat file_stat, dir_stat; | |
752 | int fd; | |
753 | ||
754 | if (stat ((char *) dir, &dir_stat) < 0) | |
755 | return FcFalse; | |
756 | ||
757 | fd = FcDirCacheOpen (dir); | |
758 | ||
759 | if (fd < 0) | |
760 | return FcFalse; | |
761 | if (fstat (fd, &file_stat) < 0) | |
762 | goto bail; | |
763 | ||
764 | close (fd); | |
765 | ||
766 | /* | |
767 | * If the directory has been modified more recently than | |
768 | * the cache file, the cache is not valid | |
769 | */ | |
770 | if (dir_stat.st_mtime > file_stat.st_mtime) | |
771 | return FcFalse; | |
772 | ||
773 | return FcTrue; | |
774 | ||
775 | bail: | |
776 | close (fd); | |
777 | return FcFalse; | |
778 | } | |
779 | ||
780 | /* Assumes that the cache file in 'dir' exists. | |
781 | * Checks that the cache has the appropriate arch section. */ | |
782 | FcBool | |
783 | FcDirCacheHasCurrentArch (const FcChar8 *dir) | |
784 | { | |
785 | int fd; | |
786 | off_t current_arch_start; | |
787 | char *current_arch_machine_name; | |
788 | FcCache metadata; | |
789 | char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; | |
790 | ||
791 | fd = FcDirCacheOpen (dir); | |
792 | if (fd < 0) | |
793 | goto bail; | |
794 | ||
795 | current_arch_machine_name = FcCacheMachineSignature(); | |
796 | current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name); | |
797 | ||
798 | if (current_arch_start >= 0) | |
799 | { | |
800 | if (lseek (fd, current_arch_start, SEEK_SET) != current_arch_start) | |
801 | goto bail1; | |
802 | ||
803 | FcCacheSkipString (fd); | |
804 | ||
805 | while (FcCacheReadString (fd, subdirName, sizeof (subdirName)) && strlen (subdirName) > 0) | |
806 | ; | |
807 | ||
808 | if (read(fd, &metadata, sizeof(FcCache)) != sizeof(FcCache)) | |
809 | goto bail1; | |
810 | ||
811 | if (metadata.magic != FC_CACHE_MAGIC) | |
812 | goto bail1; | |
813 | } | |
814 | ||
815 | close (fd); | |
816 | ||
817 | if (current_arch_start < 0) | |
818 | return FcFalse; | |
819 | ||
820 | return FcTrue; | |
821 | ||
822 | bail1: | |
823 | close (fd); | |
824 | bail: | |
825 | return FcFalse; | |
826 | } | |
827 | ||
828 | FcBool | |
829 | FcDirCacheUnlink (const FcChar8 *dir, FcConfig *config) | |
830 | { | |
831 | char *cache_file; | |
832 | char *cache_hashed = 0; | |
833 | int fd, collisions; | |
834 | struct stat cache_stat; | |
835 | char name_buf[FC_MAX_FILE_LEN]; | |
836 | ||
837 | dir = FcConfigNormalizeFontDir (config, dir); | |
838 | cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
839 | if (!cache_file) | |
840 | return FcFalse; | |
841 | ||
842 | /* First remove normal cache file. */ | |
843 | if (stat ((char *) cache_file, &cache_stat) == 0) | |
844 | unlink ((char *)cache_file); | |
845 | ||
846 | /* Next remove any applicable hashed files. */ | |
847 | fd = -1; collisions = 0; | |
848 | do | |
849 | { | |
850 | if (cache_hashed) | |
851 | FcStrFree ((FcChar8 *)cache_hashed); | |
852 | ||
853 | cache_hashed = FcDirCacheHashName (cache_file, collisions++); | |
854 | if (!cache_hashed) | |
855 | goto bail; | |
856 | ||
857 | if (fd > 0) | |
858 | close (fd); | |
859 | fd = open(cache_hashed, O_RDONLY | O_BINARY); | |
860 | if (fd == -1) | |
861 | { | |
862 | FcStrFree ((FcChar8 *)cache_hashed); | |
863 | FcStrFree ((FcChar8 *)cache_file); | |
864 | return FcTrue; | |
865 | } | |
866 | ||
867 | if (!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf)) | |
868 | { | |
869 | FcStrFree ((FcChar8 *)cache_hashed); | |
870 | goto bail; | |
871 | } | |
872 | } while (strcmp (name_buf, cache_file) != 0); | |
873 | ||
874 | close (fd); | |
875 | ||
876 | if (stat ((char *) cache_hashed, &cache_stat) == 0 && | |
877 | unlink ((char *)cache_hashed) != 0) | |
878 | { | |
879 | FcStrFree ((FcChar8 *)cache_hashed); | |
880 | goto bail; | |
881 | } | |
882 | ||
883 | FcStrFree ((FcChar8 *)cache_file); | |
884 | FcStrFree ((FcChar8 *)cache_hashed); | |
885 | return FcTrue; | |
886 | ||
887 | bail: | |
888 | FcStrFree ((FcChar8 *)cache_file); | |
889 | return FcFalse; | |
890 | } | |
891 | ||
892 | static int | |
893 | FcCacheReadDirs (FcConfig * config, FcGlobalCache * cache, | |
894 | FcStrList *list, FcFontSet * set, FcStrSet *processed_dirs) | |
895 | { | |
896 | int ret = 0; | |
897 | FcChar8 *dir; | |
898 | FcStrSet *subdirs; | |
899 | FcStrList *sublist; | |
900 | struct stat statb; | |
901 | FcGlobalCacheDir *d; | |
902 | ||
903 | /* | |
904 | * Read in the results from 'list'. | |
905 | */ | |
906 | while ((dir = FcStrListNext (list))) | |
907 | { | |
908 | if (!FcConfigAcceptFilename (config, dir)) | |
909 | continue; | |
910 | ||
911 | /* Skip this directory if already updated | |
912 | * to avoid the looped directories via symlinks | |
913 | * Clearly a dir not in fonts.conf shouldn't be globally cached. | |
914 | */ | |
915 | dir = (FcChar8 *)FcConfigNormalizeFontDir (config, dir); | |
916 | if (!dir) | |
917 | continue; | |
918 | ||
919 | if (FcStrSetMember (processed_dirs, dir)) | |
920 | continue; | |
921 | if (!FcStrSetAdd (processed_dirs, dir)) | |
922 | continue; | |
923 | ||
924 | subdirs = FcStrSetCreate (); | |
925 | if (!subdirs) | |
926 | { | |
927 | fprintf (stderr, "Can't create directory set\n"); | |
928 | ret++; | |
929 | continue; | |
930 | } | |
931 | ||
932 | if (access ((char *) dir, X_OK) < 0) | |
933 | { | |
934 | switch (errno) { | |
935 | case ENOENT: | |
936 | case ENOTDIR: | |
937 | case EACCES: | |
938 | break; | |
939 | default: | |
940 | fprintf (stderr, "\"%s\": ", dir); | |
941 | perror (""); | |
942 | ret++; | |
943 | } | |
944 | FcStrSetDestroy (subdirs); | |
945 | continue; | |
946 | } | |
947 | if (stat ((char *) dir, &statb) == -1) | |
948 | { | |
949 | fprintf (stderr, "\"%s\": ", dir); | |
950 | perror (""); | |
951 | FcStrSetDestroy (subdirs); | |
952 | ret++; | |
953 | continue; | |
954 | } | |
955 | if (!S_ISDIR (statb.st_mode)) | |
956 | { | |
957 | fprintf (stderr, "\"%s\": not a directory, skipping\n", dir); | |
958 | FcStrSetDestroy (subdirs); | |
959 | continue; | |
960 | } | |
961 | if (FcDirCacheValid (dir) && | |
962 | FcDirCacheHasCurrentArch (dir) && | |
963 | FcDirCacheRead (set, subdirs, dir, config)) | |
964 | { | |
965 | /* if an old entry is found in the global cache, disable it */ | |
966 | if ((d = FcGlobalCacheDirFind (cache, (const char *)dir)) != NULL) | |
967 | { | |
968 | d->state = FcGCDirDisabled; | |
969 | /* save the updated config later without this entry */ | |
970 | cache->updated = FcTrue; | |
971 | } | |
972 | } | |
973 | else | |
974 | { | |
975 | if (FcDebug () & FC_DBG_FONTSET) | |
976 | printf ("cache scan dir %s\n", dir); | |
977 | ||
978 | FcDirScanConfig (set, subdirs, cache, | |
979 | config->blanks, dir, FcFalse, config); | |
980 | } | |
981 | sublist = FcStrListCreate (subdirs); | |
982 | FcStrSetDestroy (subdirs); | |
983 | if (!sublist) | |
984 | { | |
985 | fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir); | |
986 | ret++; | |
987 | continue; | |
988 | } | |
989 | ret += FcCacheReadDirs (config, cache, sublist, set, processed_dirs); | |
990 | } | |
991 | FcStrListDone (list); | |
992 | return ret; | |
993 | } | |
994 | ||
995 | FcFontSet * | |
996 | FcCacheRead (FcConfig *config, FcGlobalCache * cache) | |
997 | { | |
998 | FcFontSet *s = FcFontSetCreate(); | |
999 | FcStrSet *processed_dirs; | |
1000 | ||
1001 | if (!s) | |
1002 | return 0; | |
1003 | ||
1004 | processed_dirs = FcStrSetCreate(); | |
1005 | if (!processed_dirs) | |
1006 | goto bail; | |
1007 | ||
1008 | if (FcCacheReadDirs (config, cache, FcConfigGetConfigDirs (config), s, processed_dirs)) | |
1009 | goto bail1; | |
1010 | ||
1011 | FcStrSetDestroy (processed_dirs); | |
1012 | return s; | |
1013 | ||
1014 | bail1: | |
1015 | FcStrSetDestroy (processed_dirs); | |
1016 | bail: | |
1017 | FcFontSetDestroy (s); | |
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | static const char bin2hex[] = { '0', '1', '2', '3', | |
1022 | '4', '5', '6', '7', | |
1023 | '8', '9', 'a', 'b', | |
1024 | 'c', 'd', 'e', 'f' }; | |
1025 | ||
1026 | static char * | |
1027 | FcDirCacheHashName (char * cache_file, int collisions) | |
1028 | { | |
1029 | unsigned char hash[16], hex_hash[33]; | |
1030 | char *cache_hashed; | |
1031 | unsigned char uscore = '_'; | |
1032 | int cnt, i; | |
1033 | FcChar8 *tmp; | |
1034 | struct MD5Context ctx; | |
1035 | ||
1036 | MD5Init (&ctx); | |
1037 | MD5Update (&ctx, (unsigned char *)cache_file, strlen (cache_file)); | |
1038 | ||
1039 | for (i = 0; i < collisions; i++) | |
1040 | MD5Update (&ctx, &uscore, 1); | |
1041 | ||
1042 | MD5Final (hash, &ctx); | |
1043 | ||
1044 | for (cnt = 0; cnt < 16; ++cnt) | |
1045 | { | |
1046 | hex_hash[2*cnt] = bin2hex[hash[cnt] >> 4]; | |
1047 | hex_hash[2*cnt+1] = bin2hex[hash[cnt] & 0xf]; | |
1048 | } | |
1049 | hex_hash[32] = 0; | |
1050 | ||
1051 | tmp = FcStrPlus ((FcChar8 *)hex_hash, (FcChar8 *)FC_CACHE_SUFFIX); | |
1052 | if (!tmp) | |
1053 | return 0; | |
1054 | ||
1055 | cache_hashed = (char *)FcStrPlus ((FcChar8 *)PKGCACHEDIR"/", tmp); | |
1056 | free (tmp); | |
1057 | ||
1058 | return cache_hashed; | |
1059 | } | |
1060 | ||
1061 | /* Opens the hashed name for cache_file. | |
1062 | * This would fail in the unlikely event of a collision and subsequent | |
1063 | * removal of the file which originally caused the collision. */ | |
1064 | static int | |
1065 | FcDirCacheOpen (const FcChar8 *dir) | |
1066 | { | |
1067 | FcBool found; | |
1068 | int fd = -1, collisions = 0; | |
1069 | char *cache_file, *cache_hashed; | |
1070 | char name_buf[FC_MAX_FILE_LEN]; | |
1071 | struct stat dir_stat; | |
1072 | ||
1073 | if (stat ((char *)dir, &dir_stat) == -1) | |
1074 | return -1; | |
1075 | ||
1076 | cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
1077 | if (!cache_file) | |
1078 | return -1; | |
1079 | ||
1080 | found = FcFalse; | |
1081 | do | |
1082 | { | |
1083 | struct stat c; | |
1084 | FcChar8 *name_buf_dir; | |
1085 | ||
1086 | if (fd >= 0) | |
1087 | close (fd); | |
1088 | ||
1089 | cache_hashed = FcDirCacheHashName (cache_file, collisions++); | |
1090 | if (!cache_hashed) | |
1091 | { | |
1092 | FcStrFree ((FcChar8 *)cache_file); | |
1093 | return -1; | |
1094 | } | |
1095 | ||
1096 | fd = open(cache_hashed, O_RDONLY | O_BINARY); | |
1097 | FcStrFree ((FcChar8 *)cache_hashed); | |
1098 | ||
1099 | if (fd == -1) | |
1100 | break; | |
1101 | if (!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || | |
1102 | !strlen(name_buf)) | |
1103 | break; | |
1104 | ||
1105 | name_buf_dir = FcStrDirname ((FcChar8 *)name_buf); | |
1106 | if (stat ((char *)name_buf_dir, &c) == -1) | |
1107 | { | |
1108 | FcStrFree (name_buf_dir); | |
1109 | continue; | |
1110 | } | |
1111 | FcStrFree (name_buf_dir); | |
1112 | found = (c.st_ino == dir_stat.st_ino) && (c.st_dev == dir_stat.st_dev); | |
1113 | } while (!found); | |
1114 | ||
1115 | if (!found || fd < 0) | |
1116 | { | |
1117 | if (fd >= 0) | |
1118 | close (fd); | |
1119 | fd = open(cache_file, O_RDONLY | O_BINARY); | |
1120 | } | |
1121 | ||
1122 | FcStrFree ((FcChar8 *)cache_file); | |
1123 | return fd; | |
1124 | } | |
1125 | ||
1126 | /* read serialized state from the cache file */ | |
1127 | FcBool | |
1128 | FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir, FcConfig *config) | |
1129 | { | |
1130 | int fd; | |
1131 | char *current_arch_machine_name; | |
1132 | char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE]; | |
1133 | off_t current_arch_start = 0; | |
1134 | char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1]; | |
1135 | ||
1136 | fd = FcDirCacheOpen (dir); | |
1137 | if (fd < 0) | |
1138 | goto bail; | |
1139 | ||
1140 | current_arch_machine_name = FcCacheMachineSignature(); | |
1141 | current_arch_start = FcCacheSkipToArch(fd, | |
1142 | current_arch_machine_name); | |
1143 | if (current_arch_start < 0) | |
1144 | goto bail1; | |
1145 | ||
1146 | lseek (fd, current_arch_start, SEEK_SET); | |
1147 | if (FcCacheReadString (fd, candidate_arch_machine_name, | |
1148 | sizeof (candidate_arch_machine_name)) == 0) | |
1149 | goto bail1; | |
1150 | ||
1151 | while (FcCacheReadString (fd, subdirName, sizeof (subdirName)) && strlen (subdirName) > 0) | |
1152 | FcStrSetAdd (dirs, (FcChar8 *)subdirName); | |
1153 | ||
1154 | if (!FcDirCacheConsume (fd, (const char *)dir, set, config)) | |
1155 | goto bail1; | |
1156 | ||
1157 | close(fd); | |
1158 | return FcTrue; | |
1159 | ||
1160 | bail1: | |
1161 | close (fd); | |
1162 | bail: | |
1163 | return FcFalse; | |
1164 | } | |
1165 | ||
1166 | static FcBool | |
1167 | FcDirCacheConsume (int fd, const char * dir, FcFontSet *set, FcConfig *config) | |
1168 | { | |
1169 | FcCache metadata; | |
1170 | void * current_dir_block; | |
1171 | off_t pos, endpos; | |
1172 | ||
1173 | if (read(fd, &metadata, sizeof(FcCache)) != sizeof(FcCache)) | |
1174 | return FcFalse; | |
1175 | if (metadata.magic != FC_CACHE_MAGIC) | |
1176 | return FcFalse; | |
1177 | ||
1178 | if (!metadata.count) | |
1179 | { | |
1180 | pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); | |
1181 | lseek (fd, pos, SEEK_SET); | |
1182 | if (config) | |
1183 | FcConfigAddFontDir (config, (FcChar8 *)dir); | |
1184 | return FcTrue; | |
1185 | } | |
1186 | ||
1187 | pos = FcCacheNextOffset (lseek(fd, 0, SEEK_CUR)); | |
1188 | ||
1189 | /* This is not failsafe (multi-arches can break it), | |
1190 | * but fd has got to have at least as many bytes as | |
1191 | * metadata.count, or something's going to go horribly wrong. */ | |
1192 | if (pos == (off_t)-1) | |
1193 | return FcFalse; | |
1194 | ||
1195 | endpos = lseek (fd, 0, SEEK_END); | |
1196 | if (endpos == (off_t)-1 || endpos - pos < metadata.count) | |
1197 | return FcFalse; | |
1198 | if (lseek (fd, pos, SEEK_SET) == -1) | |
1199 | return FcFalse; | |
1200 | ||
1201 | #if defined(HAVE_MMAP) || defined(__CYGWIN__) | |
1202 | current_dir_block = mmap (0, metadata.count, | |
1203 | PROT_READ, MAP_SHARED, fd, pos); | |
1204 | if (current_dir_block == MAP_FAILED) | |
1205 | return FcFalse; | |
1206 | #elif defined(_WIN32) | |
1207 | { | |
1208 | HANDLE hFileMap; | |
1209 | ||
1210 | hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL, PAGE_READONLY, 0, 0, NULL); | |
1211 | if (hFileMap == NULL) | |
1212 | return FcFalse; | |
1213 | ||
1214 | current_dir_block = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0, metadata.count + pos); | |
1215 | if (current_dir_block == NULL) | |
1216 | { | |
1217 | CloseHandle (hFileMap); | |
1218 | return FcFalse; | |
1219 | } | |
1220 | ||
1221 | current_dir_block = (void *)((char *)current_dir_block + pos); | |
1222 | } | |
1223 | #else | |
1224 | current_dir_block = malloc (metadata.count); | |
1225 | if (!current_dir_block) | |
1226 | return FcFalse; | |
1227 | ||
1228 | /* could also use CreateMappedViewOfFile under MinGW... */ | |
1229 | if (read (fd, current_dir_block, metadata.count) != metadata.count) | |
1230 | goto bail; | |
1231 | #endif | |
1232 | lseek (fd, pos+metadata.count, SEEK_SET); | |
1233 | ||
1234 | FcCacheAddBankDir (metadata.bank, dir); | |
1235 | if (config) | |
1236 | FcConfigAddFontDir (config, (FcChar8 *)dir); | |
1237 | ||
1238 | if (!FcFontSetUnserialize (&metadata, set, current_dir_block)) | |
1239 | goto bail; | |
1240 | ||
1241 | return FcTrue; | |
1242 | bail: | |
1243 | #if !(defined(HAVE_MMAP) || defined(__CYGWIN__)) | |
1244 | free (current_dir_block); | |
1245 | #endif | |
1246 | return FcFalse; | |
1247 | } | |
1248 | ||
1249 | static void * | |
1250 | FcDirCacheProduce (FcFontSet *set, FcCache *metadata) | |
1251 | { | |
1252 | void * current_dir_block, * final_dir_block; | |
1253 | static unsigned int rand_state = 0; | |
1254 | int bank, needed_bytes_no_align; | |
1255 | ||
1256 | #if defined (HAVE_RAND_R) | |
1257 | if (!rand_state) | |
1258 | rand_state = time(0L); | |
1259 | bank = rand_r(&rand_state); | |
1260 | ||
1261 | while (FcCacheHaveBank(bank)) | |
1262 | bank = rand_r(&rand_state); | |
1263 | #else | |
1264 | if (!rand_state) | |
1265 | { | |
1266 | rand_state = 1; | |
1267 | srand (time (0L)); | |
1268 | } | |
1269 | bank = rand(); | |
1270 | ||
1271 | while (FcCacheHaveBank(bank)) | |
1272 | bank = rand(); | |
1273 | #endif | |
1274 | ||
1275 | memset (metadata, 0, sizeof(FcCache)); | |
1276 | FcFontSetNewBank(); | |
1277 | needed_bytes_no_align = FcFontSetNeededBytes (set); | |
1278 | metadata->count = needed_bytes_no_align + | |
1279 | FcFontSetNeededBytesAlign (); | |
1280 | metadata->magic = FC_CACHE_MAGIC; | |
1281 | metadata->bank = bank; | |
1282 | ||
1283 | if (!needed_bytes_no_align) /* not a failure, no fonts to write */ | |
1284 | { | |
1285 | /* no, you don't really need to write any bytes at all. */ | |
1286 | metadata->count = 0; | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | current_dir_block = malloc (metadata->count); | |
1291 | if (!current_dir_block) | |
1292 | goto bail; | |
1293 | /* shut up valgrind */ | |
1294 | memset (current_dir_block, 0, metadata->count); | |
1295 | final_dir_block = FcFontSetDistributeBytes (metadata, current_dir_block); | |
1296 | ||
1297 | if ((void *)((char *)current_dir_block+metadata->count) < final_dir_block) | |
1298 | goto bail; | |
1299 | ||
1300 | if (!FcFontSetSerialize (bank, set)) | |
1301 | goto bail; | |
1302 | ||
1303 | return current_dir_block; | |
1304 | ||
1305 | bail: | |
1306 | free (current_dir_block); | |
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | /* write serialized state to the cache file */ | |
1311 | FcBool | |
1312 | FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir) | |
1313 | { | |
1314 | char *cache_file; | |
1315 | char *cache_hashed; | |
1316 | int fd, fd_orig, i, dirs_count; | |
1317 | FcAtomic *atomic; | |
1318 | FcCache metadata; | |
1319 | off_t current_arch_start = 0, truncate_to; | |
1320 | char name_buf[FC_MAX_FILE_LEN]; | |
1321 | int collisions; | |
1322 | ||
1323 | char *current_arch_machine_name, * header; | |
1324 | void *current_dir_block = 0; | |
1325 | ||
1326 | dir = FcConfigNormalizeFontDir (FcConfigGetCurrent(), dir); | |
1327 | if (!dir) | |
1328 | return FcFalse; | |
1329 | ||
1330 | cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE); | |
1331 | if (!cache_file) | |
1332 | goto bail; | |
1333 | ||
1334 | /* Ensure that we're not trampling a cache for some other dir. */ | |
1335 | /* This is slightly different from FcDirCacheOpen, since it | |
1336 | * needs the filename, not the file descriptor. */ | |
1337 | fd = -1; collisions = 0; | |
1338 | do | |
1339 | { | |
1340 | cache_hashed = FcDirCacheHashName (cache_file, collisions++); | |
1341 | if (!cache_hashed) | |
1342 | goto bail0; | |
1343 | ||
1344 | if (fd > 0) | |
1345 | close (fd); | |
1346 | fd = open(cache_hashed, O_RDONLY | O_BINARY); | |
1347 | if (fd == -1) | |
1348 | break; | |
1349 | if(!FcCacheReadString (fd, name_buf, sizeof (name_buf)) || !strlen(name_buf)) | |
1350 | { | |
1351 | close (fd); | |
1352 | FcStrFree ((FcChar8 *)cache_hashed); | |
1353 | continue; | |
1354 | } | |
1355 | close (fd); | |
1356 | ||
1357 | if (strcmp (name_buf, cache_file) != 0) | |
1358 | { | |
1359 | FcStrFree ((FcChar8 *)cache_hashed); | |
1360 | continue; | |
1361 | } | |
1362 | ||
1363 | break; | |
1364 | } while (1); | |
1365 | ||
1366 | current_dir_block = FcDirCacheProduce (set, &metadata); | |
1367 | ||
1368 | if (metadata.count && !current_dir_block) | |
1369 | goto bail1; | |
1370 | ||
1371 | if (FcDebug () & FC_DBG_CACHE) | |
1372 | printf ("FcDirCacheWriteDir cache_file \"%s\"\n", cache_file); | |
1373 | ||
1374 | atomic = FcAtomicCreate ((FcChar8 *)cache_hashed); | |
1375 | if (!atomic) | |
1376 | goto bail1; | |
1377 | ||
1378 | if (!FcAtomicLock (atomic)) | |
1379 | { | |
1380 | /* Now try rewriting the original version of the file. */ | |
1381 | FcAtomicDestroy (atomic); | |
1382 | ||
1383 | atomic = FcAtomicCreate ((FcChar8 *)cache_file); | |
1384 | fd_orig = open (cache_file, O_RDONLY | O_BINARY); | |
1385 | if (fd_orig == -1) | |
1386 | fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY | O_BINARY); | |
1387 | ||
1388 | fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666); | |
1389 | if (fd == -1) | |
1390 | goto bail2; | |
1391 | } | |
1392 | ||
1393 | /* In all cases, try opening the real location of the cache file first. */ | |
1394 | /* (even if that's not atomic.) */ | |
1395 | fd_orig = open (cache_file, O_RDONLY | O_BINARY); | |
1396 | if (fd_orig == -1) | |
1397 | fd_orig = open((char *)FcAtomicOrigFile (atomic), O_RDONLY | O_BINARY); | |
1398 | ||
1399 | fd = open((char *)FcAtomicNewFile (atomic), O_RDWR | O_CREAT | O_BINARY, 0666); | |
1400 | if (fd == -1) | |
1401 | goto bail3; | |
1402 | ||
1403 | FcCacheWriteString (fd, cache_file); | |
1404 | ||
1405 | current_arch_machine_name = FcCacheMachineSignature (); | |
1406 | current_arch_start = 0; | |
1407 | ||
1408 | if (fd_orig != -1) | |
1409 | current_arch_start = | |
1410 | FcCacheSkipToArch(fd_orig, current_arch_machine_name); | |
1411 | ||
1412 | if (current_arch_start < 0) | |
1413 | { | |
1414 | off_t offset = lseek(fd_orig, 0, SEEK_END); | |
1415 | current_arch_start = FcCacheNextOffset (offset); | |
1416 | } | |
1417 | ||
1418 | if (fd_orig != -1 && !FcCacheCopyOld(fd, fd_orig, current_arch_start)) | |
1419 | goto bail4; | |
1420 | ||
1421 | if (fd_orig != -1) | |
1422 | close (fd_orig); | |
1423 | ||
1424 | current_arch_start = lseek(fd, 0, SEEK_CUR); | |
1425 | #if defined (HAVE_FTRUNCATE) | |
1426 | if (ftruncate (fd, current_arch_start) == -1) | |
1427 | goto bail4; | |
1428 | #else | |
1429 | #if defined (HAVE_CHSIZE) | |
1430 | if (chsize (fd, current_arch_start) == -1) | |
1431 | goto bail4; | |
1432 | #else | |
1433 | goto bail4; | |
1434 | #endif | |
1435 | #endif | |
1436 | ||
1437 | /* allocate space for subdir names in this block */ | |
1438 | dirs_count = 0; | |
1439 | for (i = 0; i < dirs->size; i++) | |
1440 | dirs_count += strlen((char *)dirs->strs[i]) + 1; | |
1441 | dirs_count ++; | |
1442 | ||
1443 | /* now write the address of the next offset */ | |
1444 | truncate_to = FcCacheNextOffset (FcCacheNextOffset (current_arch_start + sizeof (FcCache) + dirs_count) + metadata.count) - current_arch_start; | |
1445 | header = malloc (10 + strlen (current_arch_machine_name)); | |
1446 | if (!header) | |
1447 | goto bail4; | |
1448 | sprintf (header, "%8x ", (int)truncate_to); | |
1449 | strcat (header, current_arch_machine_name); | |
1450 | if (!FcCacheWriteString (fd, header)) | |
1451 | goto bail5; | |
1452 | ||
1453 | for (i = 0; i < dirs->size; i++) | |
1454 | FcCacheWriteString (fd, (char *)dirs->strs[i]); | |
1455 | FcCacheWriteString (fd, ""); | |
1456 | ||
1457 | if (write (fd, &metadata, sizeof(FcCache)) != sizeof(FcCache)) | |
1458 | { | |
1459 | perror("write metadata"); | |
1460 | goto bail5; | |
1461 | } | |
1462 | if (metadata.count) | |
1463 | { | |
1464 | off_t off = FcCacheNextOffset (lseek(fd, 0, SEEK_END)); | |
1465 | if (lseek (fd, off, SEEK_SET) != off) | |
1466 | perror("lseek"); | |
1467 | else if (write (fd, current_dir_block, metadata.count) != | |
1468 | metadata.count) | |
1469 | perror("write current_dir_block"); | |
1470 | free (current_dir_block); | |
1471 | current_dir_block = 0; | |
1472 | } | |
1473 | ||
1474 | /* this actually serves to pad out the cache file, if needed */ | |
1475 | #if defined (HAVE_FTRUNCATE) | |
1476 | if (ftruncate (fd, current_arch_start + truncate_to) == -1) | |
1477 | goto bail5; | |
1478 | #else | |
1479 | #if defined (HAVE_CHSIZE) | |
1480 | if (chsize (fd, current_arch_start + truncate_to) == -1) | |
1481 | goto bail5; | |
1482 | #else | |
1483 | goto bail5; | |
1484 | #endif | |
1485 | #endif | |
1486 | ||
1487 | free (header); | |
1488 | close(fd); | |
1489 | if (!FcAtomicReplaceOrig(atomic)) | |
1490 | goto bail3; | |
1491 | FcStrFree ((FcChar8 *)cache_hashed); | |
1492 | FcStrFree ((FcChar8 *)cache_file); | |
1493 | FcAtomicUnlock (atomic); | |
1494 | FcAtomicDestroy (atomic); | |
1495 | return FcTrue; | |
1496 | ||
1497 | bail5: | |
1498 | free (header); | |
1499 | bail4: | |
1500 | close (fd); | |
1501 | bail3: | |
1502 | FcAtomicUnlock (atomic); | |
1503 | bail2: | |
1504 | FcAtomicDestroy (atomic); | |
1505 | bail1: | |
1506 | FcStrFree ((FcChar8 *)cache_hashed); | |
1507 | bail0: | |
1508 | unlink ((char *)cache_file); | |
1509 | FcStrFree ((FcChar8 *)cache_file); | |
1510 | if (current_dir_block) | |
1511 | free (current_dir_block); | |
1512 | bail: | |
1513 | return FcFalse; | |
1514 | } | |
1515 | ||
1516 | static char * | |
1517 | FcCacheMachineSignature () | |
1518 | { | |
1519 | static char buf[MACHINE_SIGNATURE_SIZE]; | |
1520 | int32_t magic = ENDIAN_TEST; | |
1521 | char * m = (char *)&magic; | |
1522 | ||
1523 | sprintf (buf, "%2x%2x%2x%2x " | |
1524 | "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x " | |
1525 | "%4x %4x %4x %4x %4x %4x %4x %4x\n", | |
1526 | m[0], m[1], m[2], m[3], | |
1527 | (unsigned int)sizeof (char), | |
1528 | (unsigned int)sizeof (char *), | |
1529 | (unsigned int)sizeof (int), | |
1530 | (unsigned int)sizeof (FcPattern), | |
1531 | (unsigned int)sizeof (FcPatternEltPtr), | |
1532 | (unsigned int)sizeof (struct _FcPatternElt *), | |
1533 | (unsigned int)sizeof (FcPatternElt), | |
1534 | (unsigned int)sizeof (FcObjectPtr), | |
1535 | (unsigned int)sizeof (FcValueListPtr), | |
1536 | (unsigned int)sizeof (FcValue), | |
1537 | (unsigned int)sizeof (FcValueBinding), | |
1538 | (unsigned int)sizeof (struct _FcValueList *), | |
1539 | (unsigned int)sizeof (FcCharSet), | |
1540 | (unsigned int)sizeof (FcCharLeaf **), | |
1541 | (unsigned int)sizeof (FcChar16 *), | |
1542 | (unsigned int)sizeof (FcChar16), | |
1543 | (unsigned int)sizeof (FcCharLeaf), | |
1544 | (unsigned int)sizeof (FcChar32), | |
1545 | (unsigned int)sizeof (FcCache), | |
1546 | #if defined (HAVE_SYSCONF) | |
1547 | (unsigned int)sysconf(_SC_PAGESIZE)); | |
1548 | #else | |
1549 | (unsigned int)FC_HARDCODED_PAGESIZE); | |
1550 | #endif | |
1551 | ||
1552 | return buf; | |
1553 | } | |
1554 | ||
1555 | static int banks_ptr = 0, banks_alloc = 0; | |
1556 | int * _fcBankId = 0, * _fcBankIdx = 0; | |
1557 | static const char ** bankDirs = 0; | |
1558 | ||
1559 | static FcBool | |
1560 | FcCacheHaveBank (int bank) | |
1561 | { | |
1562 | int i; | |
1563 | ||
1564 | if (bank < FC_BANK_FIRST) | |
1565 | return FcTrue; | |
1566 | ||
1567 | for (i = 0; i < banks_ptr; i++) | |
1568 | if (_fcBankId[i] == bank) | |
1569 | return FcTrue; | |
1570 | ||
1571 | return FcFalse; | |
1572 | } | |
1573 | ||
1574 | int | |
1575 | FcCacheBankToIndexMTF (int bank) | |
1576 | { | |
1577 | int i, j; | |
1578 | ||
1579 | for (i = 0; i < banks_ptr; i++) | |
1580 | if (_fcBankId[_fcBankIdx[i]] == bank) | |
1581 | { | |
1582 | int t = _fcBankIdx[i]; | |
1583 | ||
1584 | for (j = i; j > 0; j--) | |
1585 | _fcBankIdx[j] = _fcBankIdx[j-1]; | |
1586 | _fcBankIdx[0] = t; | |
1587 | return t; | |
1588 | } | |
1589 | ||
1590 | if (banks_ptr >= banks_alloc) | |
1591 | { | |
1592 | int * b, * bidx; | |
1593 | const char ** bds; | |
1594 | ||
1595 | b = realloc (_fcBankId, (banks_alloc + 4) * sizeof(int)); | |
1596 | if (!b) | |
1597 | return -1; | |
1598 | _fcBankId = b; | |
1599 | ||
1600 | bidx = realloc (_fcBankIdx, (banks_alloc + 4) * sizeof(int)); | |
1601 | if (!bidx) | |
1602 | return -1; | |
1603 | _fcBankIdx = bidx; | |
1604 | ||
1605 | bds = realloc (bankDirs, (banks_alloc + 4) * sizeof (char *)); | |
1606 | if (!bds) | |
1607 | return -1; | |
1608 | bankDirs = bds; | |
1609 | ||
1610 | banks_alloc += 4; | |
1611 | } | |
1612 | ||
1613 | i = banks_ptr++; | |
1614 | _fcBankId[i] = bank; | |
1615 | _fcBankIdx[i] = i; | |
1616 | return i; | |
1617 | } | |
1618 | ||
1619 | static void | |
1620 | FcCacheAddBankDir (int bank, const char * dir) | |
1621 | { | |
1622 | int bi = FcCacheBankToIndexMTF (bank); | |
1623 | ||
1624 | if (bi < 0) | |
1625 | return; | |
1626 | ||
1627 | bankDirs[bi] = (const char *)FcStrCopy ((FcChar8 *)dir); | |
1628 | } | |
1629 | ||
1630 | const char * | |
1631 | FcCacheFindBankDir (int bank) | |
1632 | { | |
1633 | int bi = FcCacheBankToIndex (bank); | |
1634 | return bankDirs[bi]; | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * This code implements the MD5 message-digest algorithm. | |
1639 | * The algorithm is due to Ron Rivest. This code was | |
1640 | * written by Colin Plumb in 1993, no copyright is claimed. | |
1641 | * This code is in the public domain; do with it what you wish. | |
1642 | * | |
1643 | * Equivalent code is available from RSA Data Security, Inc. | |
1644 | * This code has been tested against that, and is equivalent, | |
1645 | * except that you don't need to include two pages of legalese | |
1646 | * with every copy. | |
1647 | * | |
1648 | * To compute the message digest of a chunk of bytes, declare an | |
1649 | * MD5Context structure, pass it to MD5Init, call MD5Update as | |
1650 | * needed on buffers full of bytes, and then call MD5Final, which | |
1651 | * will fill a supplied 16-byte array with the digest. | |
1652 | */ | |
1653 | ||
1654 | #ifndef HIGHFIRST | |
1655 | #define byteReverse(buf, len) /* Nothing */ | |
1656 | #else | |
1657 | /* | |
1658 | * Note: this code is harmless on little-endian machines. | |
1659 | */ | |
1660 | void byteReverse(unsigned char *buf, unsigned longs) | |
1661 | { | |
1662 | FcChar32 t; | |
1663 | do { | |
1664 | t = (FcChar32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | | |
1665 | ((unsigned) buf[1] << 8 | buf[0]); | |
1666 | *(FcChar32 *) buf = t; | |
1667 | buf += 4; | |
1668 | } while (--longs); | |
1669 | } | |
1670 | #endif | |
1671 | ||
1672 | /* | |
1673 | * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious | |
1674 | * initialization constants. | |
1675 | */ | |
1676 | static void MD5Init(struct MD5Context *ctx) | |
1677 | { | |
1678 | ctx->buf[0] = 0x67452301; | |
1679 | ctx->buf[1] = 0xefcdab89; | |
1680 | ctx->buf[2] = 0x98badcfe; | |
1681 | ctx->buf[3] = 0x10325476; | |
1682 | ||
1683 | ctx->bits[0] = 0; | |
1684 | ctx->bits[1] = 0; | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * Update context to reflect the concatenation of another buffer full | |
1689 | * of bytes. | |
1690 | */ | |
1691 | static void MD5Update(struct MD5Context *ctx, unsigned char *buf, unsigned len) | |
1692 | { | |
1693 | FcChar32 t; | |
1694 | ||
1695 | /* Update bitcount */ | |
1696 | ||
1697 | t = ctx->bits[0]; | |
1698 | if ((ctx->bits[0] = t + ((FcChar32) len << 3)) < t) | |
1699 | ctx->bits[1]++; /* Carry from low to high */ | |
1700 | ctx->bits[1] += len >> 29; | |
1701 | ||
1702 | t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ | |
1703 | ||
1704 | /* Handle any leading odd-sized chunks */ | |
1705 | ||
1706 | if (t) { | |
1707 | unsigned char *p = (unsigned char *) ctx->in + t; | |
1708 | ||
1709 | t = 64 - t; | |
1710 | if (len < t) { | |
1711 | memcpy(p, buf, len); | |
1712 | return; | |
1713 | } | |
1714 | memcpy(p, buf, t); | |
1715 | byteReverse(ctx->in, 16); | |
1716 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1717 | buf += t; | |
1718 | len -= t; | |
1719 | } | |
1720 | /* Process data in 64-byte chunks */ | |
1721 | ||
1722 | while (len >= 64) { | |
1723 | memcpy(ctx->in, buf, 64); | |
1724 | byteReverse(ctx->in, 16); | |
1725 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1726 | buf += 64; | |
1727 | len -= 64; | |
1728 | } | |
1729 | ||
1730 | /* Handle any remaining bytes of data. */ | |
1731 | ||
1732 | memcpy(ctx->in, buf, len); | |
1733 | } | |
1734 | ||
1735 | /* | |
1736 | * Final wrapup - pad to 64-byte boundary with the bit pattern | |
1737 | * 1 0* (64-bit count of bits processed, MSB-first) | |
1738 | */ | |
1739 | static void MD5Final(unsigned char digest[16], struct MD5Context *ctx) | |
1740 | { | |
1741 | unsigned count; | |
1742 | unsigned char *p; | |
1743 | ||
1744 | /* Compute number of bytes mod 64 */ | |
1745 | count = (ctx->bits[0] >> 3) & 0x3F; | |
1746 | ||
1747 | /* Set the first char of padding to 0x80. This is safe since there is | |
1748 | always at least one byte free */ | |
1749 | p = ctx->in + count; | |
1750 | *p++ = 0x80; | |
1751 | ||
1752 | /* Bytes of padding needed to make 64 bytes */ | |
1753 | count = 64 - 1 - count; | |
1754 | ||
1755 | /* Pad out to 56 mod 64 */ | |
1756 | if (count < 8) { | |
1757 | /* Two lots of padding: Pad the first block to 64 bytes */ | |
1758 | memset(p, 0, count); | |
1759 | byteReverse(ctx->in, 16); | |
1760 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1761 | ||
1762 | /* Now fill the next block with 56 bytes */ | |
1763 | memset(ctx->in, 0, 56); | |
1764 | } else { | |
1765 | /* Pad block to 56 bytes */ | |
1766 | memset(p, 0, count - 8); | |
1767 | } | |
1768 | byteReverse(ctx->in, 14); | |
1769 | ||
1770 | /* Append length in bits and transform */ | |
1771 | ((FcChar32 *) ctx->in)[14] = ctx->bits[0]; | |
1772 | ((FcChar32 *) ctx->in)[15] = ctx->bits[1]; | |
1773 | ||
1774 | MD5Transform(ctx->buf, (FcChar32 *) ctx->in); | |
1775 | byteReverse((unsigned char *) ctx->buf, 4); | |
1776 | memcpy(digest, ctx->buf, 16); | |
1777 | memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */ | |
1778 | } | |
1779 | ||
1780 | ||
1781 | /* The four core functions - F1 is optimized somewhat */ | |
1782 | ||
1783 | /* #define F1(x, y, z) (x & y | ~x & z) */ | |
1784 | #define F1(x, y, z) (z ^ (x & (y ^ z))) | |
1785 | #define F2(x, y, z) F1(z, x, y) | |
1786 | #define F3(x, y, z) (x ^ y ^ z) | |
1787 | #define F4(x, y, z) (y ^ (x | ~z)) | |
1788 | ||
1789 | /* This is the central step in the MD5 algorithm. */ | |
1790 | #define MD5STEP(f, w, x, y, z, data, s) \ | |
1791 | ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) | |
1792 | ||
1793 | /* | |
1794 | * The core of the MD5 algorithm, this alters an existing MD5 hash to | |
1795 | * reflect the addition of 16 longwords of new data. MD5Update blocks | |
1796 | * the data and converts bytes into longwords for this routine. | |
1797 | */ | |
1798 | static void MD5Transform(FcChar32 buf[4], FcChar32 in[16]) | |
1799 | { | |
1800 | register FcChar32 a, b, c, d; | |
1801 | ||
1802 | a = buf[0]; | |
1803 | b = buf[1]; | |
1804 | c = buf[2]; | |
1805 | d = buf[3]; | |
1806 | ||
1807 | MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); | |
1808 | MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); | |
1809 | MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); | |
1810 | MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); | |
1811 | MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); | |
1812 | MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); | |
1813 | MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); | |
1814 | MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); | |
1815 | MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); | |
1816 | MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); | |
1817 | MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); | |
1818 | MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); | |
1819 | MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); | |
1820 | MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); | |
1821 | MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); | |
1822 | MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); | |
1823 | ||
1824 | MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); | |
1825 | MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); | |
1826 | MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); | |
1827 | MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); | |
1828 | MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); | |
1829 | MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); | |
1830 | MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); | |
1831 | MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); | |
1832 | MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); | |
1833 | MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); | |
1834 | MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); | |
1835 | MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); | |
1836 | MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); | |
1837 | MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); | |
1838 | MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); | |
1839 | MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); | |
1840 | ||
1841 | MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); | |
1842 | MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); | |
1843 | MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); | |
1844 | MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); | |
1845 | MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); | |
1846 | MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); | |
1847 | MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); | |
1848 | MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); | |
1849 | MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); | |
1850 | MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); | |
1851 | MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); | |
1852 | MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); | |
1853 | MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); | |
1854 | MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); | |
1855 | MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); | |
1856 | MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); | |
1857 | ||
1858 | MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); | |
1859 | MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); | |
1860 | MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); | |
1861 | MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); | |
1862 | MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); | |
1863 | MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); | |
1864 | MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); | |
1865 | MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); | |
1866 | MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); | |
1867 | MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); | |
1868 | MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); | |
1869 | MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); | |
1870 | MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); | |
1871 | MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); | |
1872 | MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); | |
1873 | MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); | |
1874 | ||
1875 | buf[0] += a; | |
1876 | buf[1] += b; | |
1877 | buf[2] += c; | |
1878 | buf[3] += d; | |
1879 | } |