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1 | /* | |
2 | * $RCSId: xc/lib/fontconfig/src/fclist.c,v 1.11tsi Exp $ | |
3 | * | |
4 | * Copyright © 2000 Keith Packard | |
5 | * | |
6 | * Permission to use, copy, modify, distribute, and sell this software and its | |
7 | * documentation for any purpose is hereby granted without fee, provided that | |
8 | * the above copyright notice appear in all copies and that both that | |
9 | * copyright notice and this permission notice appear in supporting | |
10 | * documentation, and that the name of Keith Packard not be used in | |
11 | * advertising or publicity pertaining to distribution of the software without | |
12 | * specific, written prior permission. Keith Packard makes no | |
13 | * representations about the suitability of this software for any purpose. It | |
14 | * is provided "as is" without express or implied warranty. | |
15 | * | |
16 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
17 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
18 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
19 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
20 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
21 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
22 | * PERFORMANCE OF THIS SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include <stdlib.h> | |
26 | #include "fcint.h" | |
27 | ||
28 | FcObjectSet * | |
29 | FcObjectSetCreate (void) | |
30 | { | |
31 | FcObjectSet *os; | |
32 | ||
33 | os = (FcObjectSet *) malloc (sizeof (FcObjectSet)); | |
34 | if (!os) | |
35 | return 0; | |
36 | FcMemAlloc (FC_MEM_OBJECTSET, sizeof (FcObjectSet)); | |
37 | os->nobject = 0; | |
38 | os->sobject = 0; | |
39 | os->objects = 0; | |
40 | return os; | |
41 | } | |
42 | ||
43 | FcBool | |
44 | FcObjectSetAdd (FcObjectSet *os, const char *object) | |
45 | { | |
46 | int s; | |
47 | const char **objects; | |
48 | int high, low, mid, c; | |
49 | ||
50 | if (os->nobject == os->sobject) | |
51 | { | |
52 | s = os->sobject + 4; | |
53 | if (os->objects) | |
54 | objects = (const char **) realloc ((void *) os->objects, | |
55 | s * sizeof (const char *)); | |
56 | else | |
57 | objects = (const char **) malloc (s * sizeof (const char *)); | |
58 | if (!objects) | |
59 | return FcFalse; | |
60 | if (os->sobject) | |
61 | FcMemFree (FC_MEM_OBJECTPTR, os->sobject * sizeof (const char *)); | |
62 | FcMemAlloc (FC_MEM_OBJECTPTR, s * sizeof (const char *)); | |
63 | os->objects = objects; | |
64 | os->sobject = s; | |
65 | } | |
66 | high = os->nobject - 1; | |
67 | low = 0; | |
68 | mid = 0; | |
69 | c = 1; | |
70 | object = (char *)FcStrStaticName ((FcChar8 *)object); | |
71 | while (low <= high) | |
72 | { | |
73 | mid = (low + high) >> 1; | |
74 | c = os->objects[mid] - object; | |
75 | if (c == 0) | |
76 | return FcTrue; | |
77 | if (c < 0) | |
78 | low = mid + 1; | |
79 | else | |
80 | high = mid - 1; | |
81 | } | |
82 | if (c < 0) | |
83 | mid++; | |
84 | memmove (os->objects + mid + 1, os->objects + mid, | |
85 | (os->nobject - mid) * sizeof (const char *)); | |
86 | os->objects[mid] = object; | |
87 | os->nobject++; | |
88 | return FcTrue; | |
89 | } | |
90 | ||
91 | void | |
92 | FcObjectSetDestroy (FcObjectSet *os) | |
93 | { | |
94 | if (os->objects) | |
95 | { | |
96 | FcMemFree (FC_MEM_OBJECTPTR, os->sobject * sizeof (const char *)); | |
97 | free ((void *) os->objects); | |
98 | } | |
99 | FcMemFree (FC_MEM_OBJECTSET, sizeof (FcObjectSet)); | |
100 | free (os); | |
101 | } | |
102 | ||
103 | FcObjectSet * | |
104 | FcObjectSetVaBuild (const char *first, va_list va) | |
105 | { | |
106 | FcObjectSet *ret; | |
107 | ||
108 | FcObjectSetVapBuild (ret, first, va); | |
109 | return ret; | |
110 | } | |
111 | ||
112 | FcObjectSet * | |
113 | FcObjectSetBuild (const char *first, ...) | |
114 | { | |
115 | va_list va; | |
116 | FcObjectSet *os; | |
117 | ||
118 | va_start (va, first); | |
119 | FcObjectSetVapBuild (os, first, va); | |
120 | va_end (va); | |
121 | return os; | |
122 | } | |
123 | ||
124 | /* | |
125 | * Font must have a containing value for every value in the pattern | |
126 | */ | |
127 | static FcBool | |
128 | FcListValueListMatchAny (FcValueListPtr patOrig, /* pattern */ | |
129 | FcValueListPtr fntOrig) /* font */ | |
130 | { | |
131 | FcValueListPtr pat, fnt; | |
132 | ||
133 | for (pat = patOrig; FcValueListPtrU(pat); | |
134 | pat = FcValueListPtrU(pat)->next) | |
135 | { | |
136 | for (fnt = fntOrig; FcValueListPtrU(fnt); | |
137 | fnt = FcValueListPtrU(fnt)->next) | |
138 | { | |
139 | /* | |
140 | * make sure the font 'contains' the pattern. | |
141 | * (OpListing is OpContains except for strings | |
142 | * where it requires an exact match) | |
143 | */ | |
144 | if (FcConfigCompareValue (&FcValueListPtrU(fnt)->value, | |
145 | FcOpListing, | |
146 | &FcValueListPtrU(pat)->value)) | |
147 | break; | |
148 | } | |
149 | if (!FcValueListPtrU(fnt)) | |
150 | return FcFalse; | |
151 | } | |
152 | return FcTrue; | |
153 | } | |
154 | ||
155 | static FcBool | |
156 | FcListValueListEqual (FcValueListPtr v1orig, | |
157 | FcValueListPtr v2orig) | |
158 | { | |
159 | FcValueListPtr v1, v2; | |
160 | ||
161 | for (v1 = v1orig; FcValueListPtrU(v1); | |
162 | v1 = FcValueListPtrU(v1)->next) | |
163 | { | |
164 | for (v2 = v2orig; FcValueListPtrU(v2); | |
165 | v2 = FcValueListPtrU(v2)->next) | |
166 | if (FcValueEqual (FcValueCanonicalize(&FcValueListPtrU(v1)->value), | |
167 | FcValueCanonicalize(&FcValueListPtrU(v2)->value))) | |
168 | break; | |
169 | if (!FcValueListPtrU(v2)) | |
170 | return FcFalse; | |
171 | } | |
172 | for (v2 = v2orig; FcValueListPtrU(v2); | |
173 | v2 = FcValueListPtrU(v2)->next) | |
174 | { | |
175 | for (v1 = v1orig; FcValueListPtrU(v1); | |
176 | v1 = FcValueListPtrU(v1)->next) | |
177 | if (FcValueEqual (FcValueCanonicalize(&FcValueListPtrU(v1)->value), | |
178 | FcValueCanonicalize(&FcValueListPtrU(v2)->value))) | |
179 | break; | |
180 | if (!FcValueListPtrU(v1)) | |
181 | return FcFalse; | |
182 | } | |
183 | return FcTrue; | |
184 | } | |
185 | ||
186 | static FcBool | |
187 | FcListPatternEqual (FcPattern *p1, | |
188 | FcPattern *p2, | |
189 | FcObjectSet *os) | |
190 | { | |
191 | int i; | |
192 | FcPatternElt *e1, *e2; | |
193 | ||
194 | for (i = 0; i < os->nobject; i++) | |
195 | { | |
196 | e1 = FcPatternFindElt (p1, os->objects[i]); | |
197 | e2 = FcPatternFindElt (p2, os->objects[i]); | |
198 | if (!e1 && !e2) | |
199 | continue; | |
200 | if (!e1 || !e2) | |
201 | return FcFalse; | |
202 | if (!FcListValueListEqual (e1->values, e2->values)) | |
203 | return FcFalse; | |
204 | } | |
205 | return FcTrue; | |
206 | } | |
207 | ||
208 | /* | |
209 | * FcTrue iff all objects in "p" match "font" | |
210 | */ | |
211 | ||
212 | FcBool | |
213 | FcListPatternMatchAny (const FcPattern *p, | |
214 | const FcPattern *font) | |
215 | { | |
216 | int i; | |
217 | FcPatternElt *e; | |
218 | ||
219 | for (i = 0; i < p->num; i++) | |
220 | { | |
221 | e = FcPatternFindElt (font, | |
222 | FcObjectPtrU((FcPatternEltU(p->elts)+i)->object)); | |
223 | if (!e) | |
224 | return FcFalse; | |
225 | if (!FcListValueListMatchAny ((FcPatternEltU(p->elts)+i)->values, /* pat elts */ | |
226 | e->values)) /* font elts */ | |
227 | return FcFalse; | |
228 | } | |
229 | return FcTrue; | |
230 | } | |
231 | ||
232 | static FcChar32 | |
233 | FcListMatrixHash (const FcMatrix *m) | |
234 | { | |
235 | int xx = (int) (m->xx * 100), | |
236 | xy = (int) (m->xy * 100), | |
237 | yx = (int) (m->yx * 100), | |
238 | yy = (int) (m->yy * 100); | |
239 | ||
240 | return ((FcChar32) xx) ^ ((FcChar32) xy) ^ ((FcChar32) yx) ^ ((FcChar32) yy); | |
241 | } | |
242 | ||
243 | static FcChar32 | |
244 | FcListValueHash (FcValue *value) | |
245 | { | |
246 | FcValue v = FcValueCanonicalize(value); | |
247 | switch (v.type) { | |
248 | case FcTypeVoid: | |
249 | return 0; | |
250 | case FcTypeInteger: | |
251 | return (FcChar32) v.u.i; | |
252 | case FcTypeDouble: | |
253 | return (FcChar32) (int) v.u.d; | |
254 | case FcTypeString: | |
255 | return FcStrHashIgnoreCase (v.u.s); | |
256 | case FcTypeBool: | |
257 | return (FcChar32) v.u.b; | |
258 | case FcTypeMatrix: | |
259 | return FcListMatrixHash (v.u.m); | |
260 | case FcTypeCharSet: | |
261 | return FcCharSetCount (v.u.c); | |
262 | case FcTypeFTFace: | |
263 | return (long) v.u.f; | |
264 | case FcTypeLangSet: | |
265 | return FcLangSetHash (v.u.l); | |
266 | } | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static FcChar32 | |
271 | FcListValueListHash (FcValueListPtr list) | |
272 | { | |
273 | FcChar32 h = 0; | |
274 | ||
275 | while (FcValueListPtrU(list)) | |
276 | { | |
277 | h = h ^ FcListValueHash (&FcValueListPtrU(list)->value); | |
278 | list = FcValueListPtrU(list)->next; | |
279 | } | |
280 | return h; | |
281 | } | |
282 | ||
283 | static FcChar32 | |
284 | FcListPatternHash (FcPattern *font, | |
285 | FcObjectSet *os) | |
286 | { | |
287 | int n; | |
288 | FcPatternElt *e; | |
289 | FcChar32 h = 0; | |
290 | ||
291 | for (n = 0; n < os->nobject; n++) | |
292 | { | |
293 | e = FcPatternFindElt (font, os->objects[n]); | |
294 | if (e) | |
295 | h = h ^ FcListValueListHash (e->values); | |
296 | } | |
297 | return h; | |
298 | } | |
299 | ||
300 | typedef struct _FcListBucket { | |
301 | struct _FcListBucket *next; | |
302 | FcChar32 hash; | |
303 | FcPattern *pattern; | |
304 | } FcListBucket; | |
305 | ||
306 | #define FC_LIST_HASH_SIZE 4099 | |
307 | ||
308 | typedef struct _FcListHashTable { | |
309 | int entries; | |
310 | FcListBucket *buckets[FC_LIST_HASH_SIZE]; | |
311 | } FcListHashTable; | |
312 | ||
313 | static void | |
314 | FcListHashTableInit (FcListHashTable *table) | |
315 | { | |
316 | table->entries = 0; | |
317 | memset (table->buckets, '\0', sizeof (table->buckets)); | |
318 | } | |
319 | ||
320 | static void | |
321 | FcListHashTableCleanup (FcListHashTable *table) | |
322 | { | |
323 | int i; | |
324 | FcListBucket *bucket, *next; | |
325 | ||
326 | for (i = 0; i < FC_LIST_HASH_SIZE; i++) | |
327 | { | |
328 | for (bucket = table->buckets[i]; bucket; bucket = next) | |
329 | { | |
330 | next = bucket->next; | |
331 | FcPatternDestroy (bucket->pattern); | |
332 | FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket)); | |
333 | free (bucket); | |
334 | } | |
335 | table->buckets[i] = 0; | |
336 | } | |
337 | table->entries = 0; | |
338 | } | |
339 | ||
340 | static int | |
341 | FcGetDefaultObjectLangIndex (FcPattern *font, const char *object) | |
342 | { | |
343 | FcChar8 *lang = FcGetDefaultLang (); | |
344 | FcPatternElt *e = FcPatternFindElt (font, object); | |
345 | FcValueListPtr v; | |
346 | FcValue value; | |
347 | int idx = -1; | |
348 | int i; | |
349 | ||
350 | if (e) | |
351 | { | |
352 | for (v = e->values, i = 0; FcValueListPtrU(v); v = FcValueListPtrU(v)->next, ++i) | |
353 | { | |
354 | value = FcValueCanonicalize (&FcValueListPtrU (v)->value); | |
355 | ||
356 | if (value.type == FcTypeString) | |
357 | { | |
358 | FcLangResult res = FcLangCompare (value.u.s, lang); | |
359 | if (res == FcLangEqual || (res == FcLangDifferentCountry && idx < 0)) | |
360 | idx = i; | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | return (idx > 0) ? idx : 0; | |
366 | } | |
367 | ||
368 | static FcBool | |
369 | FcListAppend (FcListHashTable *table, | |
370 | FcPattern *font, | |
371 | FcObjectSet *os) | |
372 | { | |
373 | int o; | |
374 | FcPatternElt *e; | |
375 | FcValueListPtr v; | |
376 | FcChar32 hash; | |
377 | FcListBucket **prev, *bucket; | |
378 | int familyidx = -1; | |
379 | int fullnameidx = -1; | |
380 | int styleidx = -1; | |
381 | int defidx = 0; | |
382 | int idx; | |
383 | ||
384 | hash = FcListPatternHash (font, os); | |
385 | for (prev = &table->buckets[hash % FC_LIST_HASH_SIZE]; | |
386 | (bucket = *prev); prev = &(bucket->next)) | |
387 | { | |
388 | if (bucket->hash == hash && | |
389 | FcListPatternEqual (bucket->pattern, font, os)) | |
390 | return FcTrue; | |
391 | } | |
392 | bucket = (FcListBucket *) malloc (sizeof (FcListBucket)); | |
393 | if (!bucket) | |
394 | goto bail0; | |
395 | FcMemAlloc (FC_MEM_LISTBUCK, sizeof (FcListBucket)); | |
396 | bucket->next = 0; | |
397 | bucket->hash = hash; | |
398 | bucket->pattern = FcPatternCreate (); | |
399 | if (!bucket->pattern) | |
400 | goto bail1; | |
401 | ||
402 | for (o = 0; o < os->nobject; o++) | |
403 | { | |
404 | if (!strcmp (os->objects[o], FC_FAMILY) || !strcmp (os->objects[o], FC_FAMILYLANG)) | |
405 | { | |
406 | if (familyidx < 0) | |
407 | familyidx = FcGetDefaultObjectLangIndex (font, FC_FAMILYLANG); | |
408 | defidx = familyidx; | |
409 | } | |
410 | else if (!strcmp (os->objects[o], FC_FULLNAME) || !strcmp (os->objects[o], FC_FULLNAMELANG)) | |
411 | { | |
412 | if (fullnameidx < 0) | |
413 | fullnameidx = FcGetDefaultObjectLangIndex (font, FC_FULLNAMELANG); | |
414 | defidx = fullnameidx; | |
415 | } | |
416 | else if (!strcmp (os->objects[o], FC_STYLE) || !strcmp (os->objects[o], FC_STYLELANG)) | |
417 | { | |
418 | if (styleidx < 0) | |
419 | styleidx = FcGetDefaultObjectLangIndex (font, FC_STYLELANG); | |
420 | defidx = styleidx; | |
421 | } | |
422 | else | |
423 | defidx = 0; | |
424 | ||
425 | e = FcPatternFindElt (font, os->objects[o]); | |
426 | if (e) | |
427 | { | |
428 | for (v = e->values, idx = 0; FcValueListPtrU(v); | |
429 | v = FcValueListPtrU(v)->next, ++idx) | |
430 | { | |
431 | if (!FcPatternAdd (bucket->pattern, | |
432 | os->objects[o], | |
433 | FcValueCanonicalize(&FcValueListPtrU(v)->value), defidx != idx)) | |
434 | goto bail2; | |
435 | } | |
436 | } | |
437 | } | |
438 | *prev = bucket; | |
439 | ++table->entries; | |
440 | ||
441 | return FcTrue; | |
442 | ||
443 | bail2: | |
444 | FcPatternDestroy (bucket->pattern); | |
445 | bail1: | |
446 | FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket)); | |
447 | free (bucket); | |
448 | bail0: | |
449 | return FcFalse; | |
450 | } | |
451 | ||
452 | FcFontSet * | |
453 | FcFontSetList (FcConfig *config, | |
454 | FcFontSet **sets, | |
455 | int nsets, | |
456 | FcPattern *p, | |
457 | FcObjectSet *os) | |
458 | { | |
459 | FcFontSet *ret; | |
460 | FcFontSet *s; | |
461 | int f; | |
462 | int set; | |
463 | FcListHashTable table; | |
464 | int i; | |
465 | FcListBucket *bucket; | |
466 | ||
467 | if (!config) | |
468 | { | |
469 | if (!FcInitBringUptoDate ()) | |
470 | goto bail0; | |
471 | ||
472 | config = FcConfigGetCurrent (); | |
473 | if (!config) | |
474 | goto bail0; | |
475 | } | |
476 | FcListHashTableInit (&table); | |
477 | /* | |
478 | * Walk all available fonts adding those that | |
479 | * match to the hash table | |
480 | */ | |
481 | for (set = 0; set < nsets; set++) | |
482 | { | |
483 | s = sets[set]; | |
484 | if (!s) | |
485 | continue; | |
486 | for (f = 0; f < s->nfont; f++) | |
487 | if (FcListPatternMatchAny (p, /* pattern */ | |
488 | s->fonts[f])) /* font */ | |
489 | if (!FcListAppend (&table, s->fonts[f], os)) | |
490 | goto bail1; | |
491 | } | |
492 | #if 0 | |
493 | { | |
494 | int max = 0; | |
495 | int full = 0; | |
496 | int ents = 0; | |
497 | int len; | |
498 | for (i = 0; i < FC_LIST_HASH_SIZE; i++) | |
499 | { | |
500 | if ((bucket = table.buckets[i])) | |
501 | { | |
502 | len = 0; | |
503 | for (; bucket; bucket = bucket->next) | |
504 | { | |
505 | ents++; | |
506 | len++; | |
507 | } | |
508 | if (len > max) | |
509 | max = len; | |
510 | full++; | |
511 | } | |
512 | } | |
513 | printf ("used: %d max: %d avg: %g\n", full, max, | |
514 | (double) ents / FC_LIST_HASH_SIZE); | |
515 | } | |
516 | #endif | |
517 | /* | |
518 | * Walk the hash table and build | |
519 | * a font set | |
520 | */ | |
521 | ret = FcFontSetCreate (); | |
522 | if (!ret) | |
523 | goto bail0; | |
524 | for (i = 0; i < FC_LIST_HASH_SIZE; i++) | |
525 | while ((bucket = table.buckets[i])) | |
526 | { | |
527 | if (!FcFontSetAdd (ret, bucket->pattern)) | |
528 | goto bail2; | |
529 | table.buckets[i] = bucket->next; | |
530 | FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket)); | |
531 | free (bucket); | |
532 | } | |
533 | ||
534 | return ret; | |
535 | ||
536 | bail2: | |
537 | FcFontSetDestroy (ret); | |
538 | bail1: | |
539 | FcListHashTableCleanup (&table); | |
540 | bail0: | |
541 | return 0; | |
542 | } | |
543 | ||
544 | FcFontSet * | |
545 | FcFontList (FcConfig *config, | |
546 | FcPattern *p, | |
547 | FcObjectSet *os) | |
548 | { | |
549 | FcFontSet *sets[2]; | |
550 | int nsets; | |
551 | ||
552 | if (!config) | |
553 | { | |
554 | config = FcConfigGetCurrent (); | |
555 | if (!config) | |
556 | return 0; | |
557 | } | |
558 | nsets = 0; | |
559 | if (config->fonts[FcSetSystem]) | |
560 | sets[nsets++] = config->fonts[FcSetSystem]; | |
561 | if (config->fonts[FcSetApplication]) | |
562 | sets[nsets++] = config->fonts[FcSetApplication]; | |
563 | return FcFontSetList (config, sets, nsets, p, os); | |
564 | } |