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1 | /* | |
2 | * Copyright © 2008,2009 Red Hat, Inc. | |
3 | * | |
4 | * Red Hat Author(s): Behdad Esfahbod | |
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 the author(s) not be used in | |
11 | * advertising or publicity pertaining to distribution of the software without | |
12 | * specific, written prior permission. The authors make 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 | * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
17 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
18 | * EVENT SHALL THE AUTHOR(S) 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 "fcint.h" | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <stdarg.h> | |
29 | ||
30 | ||
31 | /* The language is documented in doc/fcformat.fncs | |
32 | * These are the features implemented: | |
33 | * | |
34 | * simple %{elt} | |
35 | * width %width{elt} | |
36 | * index %{elt[idx]} | |
37 | * name= %{elt=} | |
38 | * :name= %{:elt} | |
39 | * default %{elt:-word} | |
40 | * count %{#elt} | |
41 | * subexpr %{{expr}} | |
42 | * filter-out %{-elt1,elt2,elt3{expr}} | |
43 | * filter-in %{+elt1,elt2,elt3{expr}} | |
44 | * conditional %{?elt1,elt2,!elt3{}{}} | |
45 | * enumerate %{[]elt1,elt2{expr}} | |
46 | * langset langset enumeration using the same syntax | |
47 | * builtin %{=blt} | |
48 | * convert %{elt|conv1|conv2|conv3} | |
49 | * | |
50 | * converters: | |
51 | * basename FcStrBasename | |
52 | * dirname FcStrDirname | |
53 | * downcase FcStrDowncase | |
54 | * shescape | |
55 | * cescape | |
56 | * xmlescape | |
57 | * delete delete chars | |
58 | * escape escape chars | |
59 | * translate translate chars | |
60 | * | |
61 | * builtins: | |
62 | * unparse FcNameUnparse | |
63 | * fcmatch fc-match default | |
64 | * fclist fc-list default | |
65 | * fccat fc-cat default | |
66 | * pkgkit PackageKit package tag format | |
67 | * | |
68 | * | |
69 | * Some ideas for future syntax extensions: | |
70 | * | |
71 | * - verbose builtin that is like FcPatternPrint | |
72 | * - allow indexing subexprs using '%{[idx]elt1,elt2{subexpr}}' | |
73 | * - allow indexing in +, -, ? filtering? | |
74 | * - conditional/filtering/deletion on binding (using '(w)'/'(s)'/'(=)' notation) | |
75 | */ | |
76 | ||
77 | ||
78 | #define FCCAT_FORMAT "\"%{file|basename|cescape}\" %{index} \"%{-file{%{=unparse|cescape}}}\"" | |
79 | #define FCMATCH_FORMAT "%{file:-<unknown filename>|basename}: \"%{family[0]:-<unknown family>}\" \"%{style[0]:-<unknown style>}\"" | |
80 | #define FCLIST_FORMAT "%{?file{%{file}: }}%{-file{%{=unparse}}}" | |
81 | #define PKGKIT_FORMAT "%{[]family{font(%{family|downcase|delete( )})\n}}%{[]lang{font(:lang=%{lang|downcase|translate(_,-)})\n}}" | |
82 | ||
83 | ||
84 | static void | |
85 | message (const char *fmt, ...) | |
86 | { | |
87 | va_list args; | |
88 | va_start (args, fmt); | |
89 | fprintf (stderr, "Fontconfig: Pattern format error: "); | |
90 | vfprintf (stderr, fmt, args); | |
91 | fprintf (stderr, ".\n"); | |
92 | va_end (args); | |
93 | } | |
94 | ||
95 | ||
96 | typedef struct _FcFormatContext | |
97 | { | |
98 | const FcChar8 *format_orig; | |
99 | const FcChar8 *format; | |
100 | int format_len; | |
101 | FcChar8 *word; | |
102 | FcBool word_allocated; | |
103 | } FcFormatContext; | |
104 | ||
105 | static FcBool | |
106 | FcFormatContextInit (FcFormatContext *c, | |
107 | const FcChar8 *format, | |
108 | FcChar8 *scratch, | |
109 | int scratch_len) | |
110 | { | |
111 | c->format_orig = c->format = format; | |
112 | c->format_len = strlen ((const char *) format); | |
113 | ||
114 | if (c->format_len < scratch_len) | |
115 | { | |
116 | c->word = scratch; | |
117 | c->word_allocated = FcFalse; | |
118 | } | |
119 | else | |
120 | { | |
121 | c->word = malloc (c->format_len + 1); | |
122 | c->word_allocated = FcTrue; | |
123 | } | |
124 | ||
125 | return c->word != NULL; | |
126 | } | |
127 | ||
128 | static void | |
129 | FcFormatContextDone (FcFormatContext *c) | |
130 | { | |
131 | if (c && c->word_allocated) | |
132 | { | |
133 | free (c->word); | |
134 | } | |
135 | } | |
136 | ||
137 | static FcBool | |
138 | consume_char (FcFormatContext *c, | |
139 | FcChar8 term) | |
140 | { | |
141 | if (*c->format != term) | |
142 | return FcFalse; | |
143 | ||
144 | c->format++; | |
145 | return FcTrue; | |
146 | } | |
147 | ||
148 | static FcBool | |
149 | expect_char (FcFormatContext *c, | |
150 | FcChar8 term) | |
151 | { | |
152 | FcBool res = consume_char (c, term); | |
153 | if (!res) | |
154 | { | |
155 | if (c->format == c->format_orig + c->format_len) | |
156 | message ("format ended while expecting '%c'", | |
157 | term); | |
158 | else | |
159 | message ("expected '%c' at %d", | |
160 | term, c->format - c->format_orig + 1); | |
161 | } | |
162 | return res; | |
163 | } | |
164 | ||
165 | static FcBool | |
166 | FcCharIsPunct (const FcChar8 c) | |
167 | { | |
168 | if (c < '0') | |
169 | return FcTrue; | |
170 | if (c <= '9') | |
171 | return FcFalse; | |
172 | if (c < 'A') | |
173 | return FcTrue; | |
174 | if (c <= 'Z') | |
175 | return FcFalse; | |
176 | if (c < 'a') | |
177 | return FcTrue; | |
178 | if (c <= 'z') | |
179 | return FcFalse; | |
180 | if (c <= '~') | |
181 | return FcTrue; | |
182 | return FcFalse; | |
183 | } | |
184 | ||
185 | static char escaped_char(const char ch) | |
186 | { | |
187 | switch (ch) { | |
188 | case 'a': return '\a'; | |
189 | case 'b': return '\b'; | |
190 | case 'f': return '\f'; | |
191 | case 'n': return '\n'; | |
192 | case 'r': return '\r'; | |
193 | case 't': return '\t'; | |
194 | case 'v': return '\v'; | |
195 | default: return ch; | |
196 | } | |
197 | } | |
198 | ||
199 | static FcBool | |
200 | read_word (FcFormatContext *c) | |
201 | { | |
202 | FcChar8 *p; | |
203 | ||
204 | p = c->word; | |
205 | ||
206 | while (*c->format) | |
207 | { | |
208 | if (*c->format == '\\') | |
209 | { | |
210 | c->format++; | |
211 | if (*c->format) | |
212 | *p++ = escaped_char (*c->format++); | |
213 | continue; | |
214 | } | |
215 | else if (FcCharIsPunct (*c->format)) | |
216 | break; | |
217 | ||
218 | *p++ = *c->format++; | |
219 | } | |
220 | *p = '\0'; | |
221 | ||
222 | if (p == c->word) | |
223 | { | |
224 | message ("expected identifier at %d", | |
225 | c->format - c->format_orig + 1); | |
226 | return FcFalse; | |
227 | } | |
228 | ||
229 | return FcTrue; | |
230 | } | |
231 | ||
232 | static FcBool | |
233 | read_chars (FcFormatContext *c, | |
234 | FcChar8 term) | |
235 | { | |
236 | FcChar8 *p; | |
237 | ||
238 | p = c->word; | |
239 | ||
240 | while (*c->format && *c->format != '}' && *c->format != term) | |
241 | { | |
242 | if (*c->format == '\\') | |
243 | { | |
244 | c->format++; | |
245 | if (*c->format) | |
246 | *p++ = escaped_char (*c->format++); | |
247 | continue; | |
248 | } | |
249 | ||
250 | *p++ = *c->format++; | |
251 | } | |
252 | *p = '\0'; | |
253 | ||
254 | if (p == c->word) | |
255 | { | |
256 | message ("expected character data at %d", | |
257 | c->format - c->format_orig + 1); | |
258 | return FcFalse; | |
259 | } | |
260 | ||
261 | return FcTrue; | |
262 | } | |
263 | ||
264 | static FcBool | |
265 | FcPatternFormatToBuf (FcPattern *pat, | |
266 | const FcChar8 *format, | |
267 | FcStrBuf *buf); | |
268 | ||
269 | static FcBool | |
270 | interpret_builtin (FcFormatContext *c, | |
271 | FcPattern *pat, | |
272 | FcStrBuf *buf) | |
273 | { | |
274 | FcChar8 *new_str; | |
275 | FcBool ret; | |
276 | ||
277 | if (!expect_char (c, '=') || | |
278 | !read_word (c)) | |
279 | return FcFalse; | |
280 | ||
281 | /* try simple builtins first */ | |
282 | if (0) { } | |
283 | #define BUILTIN(name, func) \ | |
284 | else if (0 == strcmp ((const char *) c->word, name))\ | |
285 | do { new_str = func (pat); ret = FcTrue; } while (0) | |
286 | BUILTIN ("unparse", FcNameUnparse); | |
287 | /* BUILTIN ("verbose", FcPatternPrint); XXX */ | |
288 | #undef BUILTIN | |
289 | else | |
290 | ret = FcFalse; | |
291 | ||
292 | if (ret) | |
293 | { | |
294 | if (new_str) | |
295 | { | |
296 | FcStrBufString (buf, new_str); | |
297 | free (new_str); | |
298 | return FcTrue; | |
299 | } | |
300 | else | |
301 | return FcFalse; | |
302 | } | |
303 | ||
304 | /* now try our custom formats */ | |
305 | if (0) { } | |
306 | #define BUILTIN(name, format) \ | |
307 | else if (0 == strcmp ((const char *) c->word, name))\ | |
308 | ret = FcPatternFormatToBuf (pat, (const FcChar8 *) format, buf) | |
309 | BUILTIN ("fccat", FCCAT_FORMAT); | |
310 | BUILTIN ("fcmatch", FCMATCH_FORMAT); | |
311 | BUILTIN ("fclist", FCLIST_FORMAT); | |
312 | BUILTIN ("pkgkit", PKGKIT_FORMAT); | |
313 | #undef BUILTIN | |
314 | else | |
315 | ret = FcFalse; | |
316 | ||
317 | if (!ret) | |
318 | message ("unknown builtin \"%s\"", | |
319 | c->word); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
324 | static FcBool | |
325 | interpret_expr (FcFormatContext *c, | |
326 | FcPattern *pat, | |
327 | FcStrBuf *buf, | |
328 | FcChar8 term); | |
329 | ||
330 | static FcBool | |
331 | interpret_subexpr (FcFormatContext *c, | |
332 | FcPattern *pat, | |
333 | FcStrBuf *buf) | |
334 | { | |
335 | return expect_char (c, '{') && | |
336 | interpret_expr (c, pat, buf, '}') && | |
337 | expect_char (c, '}'); | |
338 | } | |
339 | ||
340 | static FcBool | |
341 | maybe_interpret_subexpr (FcFormatContext *c, | |
342 | FcPattern *pat, | |
343 | FcStrBuf *buf) | |
344 | { | |
345 | return (*c->format == '{') ? | |
346 | interpret_subexpr (c, pat, buf) : | |
347 | FcTrue; | |
348 | } | |
349 | ||
350 | static FcBool | |
351 | skip_subexpr (FcFormatContext *c); | |
352 | ||
353 | static FcBool | |
354 | skip_percent (FcFormatContext *c) | |
355 | { | |
356 | int width; | |
357 | ||
358 | if (!expect_char (c, '%')) | |
359 | return FcFalse; | |
360 | ||
361 | /* skip an optional width specifier */ | |
362 | width = strtol ((const char *) c->format, (char **) &c->format, 10); | |
363 | ||
364 | if (!expect_char (c, '{')) | |
365 | return FcFalse; | |
366 | ||
367 | while(*c->format && *c->format != '}') | |
368 | { | |
369 | switch (*c->format) | |
370 | { | |
371 | case '\\': | |
372 | c->format++; /* skip over '\\' */ | |
373 | if (*c->format) | |
374 | c->format++; | |
375 | continue; | |
376 | case '{': | |
377 | if (!skip_subexpr (c)) | |
378 | return FcFalse; | |
379 | continue; | |
380 | } | |
381 | c->format++; | |
382 | } | |
383 | ||
384 | return expect_char (c, '}'); | |
385 | } | |
386 | ||
387 | static FcBool | |
388 | skip_expr (FcFormatContext *c) | |
389 | { | |
390 | while(*c->format && *c->format != '}') | |
391 | { | |
392 | switch (*c->format) | |
393 | { | |
394 | case '\\': | |
395 | c->format++; /* skip over '\\' */ | |
396 | if (*c->format) | |
397 | c->format++; | |
398 | continue; | |
399 | case '%': | |
400 | if (!skip_percent (c)) | |
401 | return FcFalse; | |
402 | continue; | |
403 | } | |
404 | c->format++; | |
405 | } | |
406 | ||
407 | return FcTrue; | |
408 | } | |
409 | ||
410 | static FcBool | |
411 | skip_subexpr (FcFormatContext *c) | |
412 | { | |
413 | return expect_char (c, '{') && | |
414 | skip_expr (c) && | |
415 | expect_char (c, '}'); | |
416 | } | |
417 | ||
418 | static FcBool | |
419 | maybe_skip_subexpr (FcFormatContext *c) | |
420 | { | |
421 | return (*c->format == '{') ? | |
422 | skip_subexpr (c) : | |
423 | FcTrue; | |
424 | } | |
425 | ||
426 | static FcBool | |
427 | interpret_filter_in (FcFormatContext *c, | |
428 | FcPattern *pat, | |
429 | FcStrBuf *buf) | |
430 | { | |
431 | FcObjectSet *os; | |
432 | FcPattern *subpat; | |
433 | ||
434 | if (!expect_char (c, '+')) | |
435 | return FcFalse; | |
436 | ||
437 | os = FcObjectSetCreate (); | |
438 | if (!os) | |
439 | return FcFalse; | |
440 | ||
441 | do | |
442 | { | |
443 | /* XXX binding */ | |
444 | if (!read_word (c) || | |
445 | !FcObjectSetAdd (os, (const char *) c->word)) | |
446 | { | |
447 | FcObjectSetDestroy (os); | |
448 | return FcFalse; | |
449 | } | |
450 | } | |
451 | while (consume_char (c, ',')); | |
452 | ||
453 | subpat = FcPatternFilter (pat, os); | |
454 | FcObjectSetDestroy (os); | |
455 | ||
456 | if (!subpat || | |
457 | !interpret_subexpr (c, subpat, buf)) | |
458 | return FcFalse; | |
459 | ||
460 | FcPatternDestroy (subpat); | |
461 | return FcTrue; | |
462 | } | |
463 | ||
464 | static FcBool | |
465 | interpret_filter_out (FcFormatContext *c, | |
466 | FcPattern *pat, | |
467 | FcStrBuf *buf) | |
468 | { | |
469 | FcPattern *subpat; | |
470 | ||
471 | if (!expect_char (c, '-')) | |
472 | return FcFalse; | |
473 | ||
474 | subpat = FcPatternDuplicate (pat); | |
475 | if (!subpat) | |
476 | return FcFalse; | |
477 | ||
478 | do | |
479 | { | |
480 | if (!read_word (c)) | |
481 | { | |
482 | FcPatternDestroy (subpat); | |
483 | return FcFalse; | |
484 | } | |
485 | ||
486 | FcPatternDel (subpat, (const char *) c->word); | |
487 | } | |
488 | while (consume_char (c, ',')); | |
489 | ||
490 | if (!interpret_subexpr (c, subpat, buf)) | |
491 | return FcFalse; | |
492 | ||
493 | FcPatternDestroy (subpat); | |
494 | return FcTrue; | |
495 | } | |
496 | ||
497 | static FcBool | |
498 | interpret_cond (FcFormatContext *c, | |
499 | FcPattern *pat, | |
500 | FcStrBuf *buf) | |
501 | { | |
502 | FcBool pass; | |
503 | ||
504 | if (!expect_char (c, '?')) | |
505 | return FcFalse; | |
506 | ||
507 | pass = FcTrue; | |
508 | ||
509 | do | |
510 | { | |
511 | FcBool negate; | |
512 | FcValue v; | |
513 | ||
514 | negate = consume_char (c, '!'); | |
515 | ||
516 | if (!read_word (c)) | |
517 | return FcFalse; | |
518 | ||
519 | pass = pass && | |
520 | (negate ^ | |
521 | (FcResultMatch == | |
522 | FcPatternGet (pat, (const char *) c->word, 0, &v))); | |
523 | } | |
524 | while (consume_char (c, ',')); | |
525 | ||
526 | if (pass) | |
527 | { | |
528 | if (!interpret_subexpr (c, pat, buf) || | |
529 | !maybe_skip_subexpr (c)) | |
530 | return FcFalse; | |
531 | } | |
532 | else | |
533 | { | |
534 | if (!skip_subexpr (c) || | |
535 | !maybe_interpret_subexpr (c, pat, buf)) | |
536 | return FcFalse; | |
537 | } | |
538 | ||
539 | return FcTrue; | |
540 | } | |
541 | ||
542 | static FcBool | |
543 | interpret_count (FcFormatContext *c, | |
544 | FcPattern *pat, | |
545 | FcStrBuf *buf) | |
546 | { | |
547 | int count; | |
548 | FcPatternElt *e; | |
549 | FcChar8 buf_static[64]; | |
550 | ||
551 | if (!expect_char (c, '#')) | |
552 | return FcFalse; | |
553 | ||
554 | if (!read_word (c)) | |
555 | return FcFalse; | |
556 | ||
557 | count = 0; | |
558 | e = FcPatternObjectFindElt (pat, | |
559 | FcObjectFromName ((const char *) c->word)); | |
560 | if (e) | |
561 | { | |
562 | FcValueListPtr l; | |
563 | count++; | |
564 | for (l = FcPatternEltValues(e); | |
565 | l->next; | |
566 | l = l->next) | |
567 | count++; | |
568 | } | |
569 | ||
570 | snprintf ((char *) buf_static, sizeof (buf_static), "%d", count); | |
571 | FcStrBufString (buf, buf_static); | |
572 | ||
573 | return FcTrue; | |
574 | } | |
575 | ||
576 | static FcBool | |
577 | interpret_enumerate (FcFormatContext *c, | |
578 | FcPattern *pat, | |
579 | FcStrBuf *buf) | |
580 | { | |
581 | FcObjectSet *os; | |
582 | FcPattern *subpat; | |
583 | const FcChar8 *format_save; | |
584 | int idx; | |
585 | FcBool ret, done; | |
586 | FcStrList *lang_strs; | |
587 | ||
588 | if (!expect_char (c, '[') || | |
589 | !expect_char (c, ']')) | |
590 | return FcFalse; | |
591 | ||
592 | os = FcObjectSetCreate (); | |
593 | if (!os) | |
594 | return FcFalse; | |
595 | ||
596 | ret = FcTrue; | |
597 | ||
598 | do | |
599 | { | |
600 | if (!read_word (c) || | |
601 | !FcObjectSetAdd (os, (const char *) c->word)) | |
602 | { | |
603 | FcObjectSetDestroy (os); | |
604 | return FcFalse; | |
605 | } | |
606 | } | |
607 | while (consume_char (c, ',')); | |
608 | ||
609 | /* If we have one element and it's of type FcLangSet, we want | |
610 | * to enumerate the languages in it. */ | |
611 | lang_strs = NULL; | |
612 | if (os->nobject == 1) | |
613 | { | |
614 | FcLangSet *langset; | |
615 | if (FcResultMatch == | |
616 | FcPatternGetLangSet (pat, os->objects[0], 0, &langset)) | |
617 | { | |
618 | FcStrSet *ss; | |
619 | if (!(ss = FcLangSetGetLangs (langset)) || | |
620 | !(lang_strs = FcStrListCreate (ss))) | |
621 | goto bail0; | |
622 | } | |
623 | } | |
624 | ||
625 | subpat = FcPatternDuplicate (pat); | |
626 | if (!subpat) | |
627 | goto bail0; | |
628 | ||
629 | format_save = c->format; | |
630 | idx = 0; | |
631 | do | |
632 | { | |
633 | int i; | |
634 | ||
635 | done = FcTrue; | |
636 | ||
637 | if (lang_strs) | |
638 | { | |
639 | FcChar8 *lang; | |
640 | ||
641 | FcPatternDel (subpat, os->objects[0]); | |
642 | if ((lang = FcStrListNext (lang_strs))) | |
643 | { | |
644 | /* XXX binding? */ | |
645 | FcPatternAddString (subpat, os->objects[0], lang); | |
646 | done = FcFalse; | |
647 | } | |
648 | } | |
649 | else | |
650 | { | |
651 | for (i = 0; i < os->nobject; i++) | |
652 | { | |
653 | FcValue v; | |
654 | ||
655 | /* XXX this can be optimized by accessing valuelist linked lists | |
656 | * directly and remembering where we were. Most (all) value lists | |
657 | * in normal uses are pretty short though (language tags are | |
658 | * stored as a LangSet, not separate values.). */ | |
659 | FcPatternDel (subpat, os->objects[i]); | |
660 | if (FcResultMatch == | |
661 | FcPatternGet (pat, os->objects[i], idx, &v)) | |
662 | { | |
663 | /* XXX binding */ | |
664 | FcPatternAdd (subpat, os->objects[i], v, FcFalse); | |
665 | done = FcFalse; | |
666 | } | |
667 | } | |
668 | } | |
669 | ||
670 | if (!done) | |
671 | { | |
672 | c->format = format_save; | |
673 | ret = interpret_subexpr (c, subpat, buf); | |
674 | if (!ret) | |
675 | goto bail; | |
676 | } | |
677 | ||
678 | idx++; | |
679 | } while (!done); | |
680 | ||
681 | if (c->format == format_save) | |
682 | skip_subexpr (c); | |
683 | ||
684 | bail: | |
685 | FcPatternDestroy (subpat); | |
686 | bail0: | |
687 | if (lang_strs) | |
688 | FcStrListDone (lang_strs); | |
689 | FcObjectSetDestroy (os); | |
690 | ||
691 | return ret; | |
692 | } | |
693 | ||
694 | static FcBool | |
695 | interpret_simple (FcFormatContext *c, | |
696 | FcPattern *pat, | |
697 | FcStrBuf *buf) | |
698 | { | |
699 | FcPatternElt *e; | |
700 | FcBool add_colon = FcFalse; | |
701 | FcBool add_elt_name = FcFalse; | |
702 | int idx; | |
703 | FcChar8 *else_string; | |
704 | ||
705 | if (consume_char (c, ':')) | |
706 | add_colon = FcTrue; | |
707 | ||
708 | if (!read_word (c)) | |
709 | return FcFalse; | |
710 | ||
711 | idx = -1; | |
712 | if (consume_char (c, '[')) | |
713 | { | |
714 | idx = strtol ((const char *) c->format, (char **) &c->format, 10); | |
715 | if (idx < 0) | |
716 | { | |
717 | message ("expected non-negative number at %d", | |
718 | c->format-1 - c->format_orig + 1); | |
719 | return FcFalse; | |
720 | } | |
721 | if (!expect_char (c, ']')) | |
722 | return FcFalse; | |
723 | } | |
724 | ||
725 | if (consume_char (c, '=')) | |
726 | add_elt_name = FcTrue; | |
727 | ||
728 | /* modifiers */ | |
729 | else_string = NULL; | |
730 | if (consume_char (c, ':')) | |
731 | { | |
732 | FcChar8 *orig; | |
733 | /* divert the c->word for now */ | |
734 | orig = c->word; | |
735 | c->word = c->word + strlen ((const char *) c->word) + 1; | |
736 | /* for now we just support 'default value' */ | |
737 | if (!expect_char (c, '-') || | |
738 | !read_chars (c, '|')) | |
739 | { | |
740 | c->word = orig; | |
741 | return FcFalse; | |
742 | } | |
743 | else_string = c->word; | |
744 | c->word = orig; | |
745 | } | |
746 | ||
747 | e = FcPatternObjectFindElt (pat, | |
748 | FcObjectFromName ((const char *) c->word)); | |
749 | if (e || else_string) | |
750 | { | |
751 | FcValueListPtr l = NULL; | |
752 | ||
753 | if (add_colon) | |
754 | FcStrBufChar (buf, ':'); | |
755 | if (add_elt_name) | |
756 | { | |
757 | FcStrBufString (buf, c->word); | |
758 | FcStrBufChar (buf, '='); | |
759 | } | |
760 | ||
761 | if (e) | |
762 | l = FcPatternEltValues(e); | |
763 | ||
764 | if (idx != -1) | |
765 | { | |
766 | while (l && idx > 0) | |
767 | { | |
768 | l = FcValueListNext(l); | |
769 | idx--; | |
770 | } | |
771 | if (l && idx == 0) | |
772 | { | |
773 | if (!FcNameUnparseValue (buf, &l->value, '\0')) | |
774 | return FcFalse; | |
775 | } | |
776 | else goto notfound; | |
777 | } | |
778 | else if (l) | |
779 | { | |
780 | FcNameUnparseValueList (buf, l, '\0'); | |
781 | } | |
782 | else | |
783 | { | |
784 | notfound: | |
785 | if (else_string) | |
786 | FcStrBufString (buf, else_string); | |
787 | } | |
788 | } | |
789 | ||
790 | return FcTrue; | |
791 | } | |
792 | ||
793 | static FcBool | |
794 | cescape (FcFormatContext *c, | |
795 | const FcChar8 *str, | |
796 | FcStrBuf *buf) | |
797 | { | |
798 | /* XXX escape \n etc? */ | |
799 | ||
800 | while(*str) | |
801 | { | |
802 | switch (*str) | |
803 | { | |
804 | case '\\': | |
805 | case '"': | |
806 | FcStrBufChar (buf, '\\'); | |
807 | break; | |
808 | } | |
809 | FcStrBufChar (buf, *str++); | |
810 | } | |
811 | return FcTrue; | |
812 | } | |
813 | ||
814 | static FcBool | |
815 | shescape (FcFormatContext *c, | |
816 | const FcChar8 *str, | |
817 | FcStrBuf *buf) | |
818 | { | |
819 | FcStrBufChar (buf, '\''); | |
820 | while(*str) | |
821 | { | |
822 | if (*str == '\'') | |
823 | FcStrBufString (buf, (const FcChar8 *) "'\\''"); | |
824 | else | |
825 | FcStrBufChar (buf, *str); | |
826 | str++; | |
827 | } | |
828 | FcStrBufChar (buf, '\''); | |
829 | return FcTrue; | |
830 | } | |
831 | ||
832 | static FcBool | |
833 | xmlescape (FcFormatContext *c, | |
834 | const FcChar8 *str, | |
835 | FcStrBuf *buf) | |
836 | { | |
837 | /* XXX escape \n etc? */ | |
838 | ||
839 | while(*str) | |
840 | { | |
841 | switch (*str) | |
842 | { | |
843 | case '&': FcStrBufString (buf, (const FcChar8 *) "&"); break; | |
844 | case '<': FcStrBufString (buf, (const FcChar8 *) "<"); break; | |
845 | case '>': FcStrBufString (buf, (const FcChar8 *) ">"); break; | |
846 | default: FcStrBufChar (buf, *str); break; | |
847 | } | |
848 | str++; | |
849 | } | |
850 | return FcTrue; | |
851 | } | |
852 | ||
853 | static FcBool | |
854 | delete_chars (FcFormatContext *c, | |
855 | const FcChar8 *str, | |
856 | FcStrBuf *buf) | |
857 | { | |
858 | /* XXX not UTF-8 aware */ | |
859 | ||
860 | if (!expect_char (c, '(') || | |
861 | !read_chars (c, ')') || | |
862 | !expect_char (c, ')')) | |
863 | return FcFalse; | |
864 | ||
865 | while(*str) | |
866 | { | |
867 | FcChar8 *p; | |
868 | ||
869 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word); | |
870 | if (p) | |
871 | { | |
872 | FcStrBufData (buf, str, p - str); | |
873 | str = p + 1; | |
874 | } | |
875 | else | |
876 | { | |
877 | FcStrBufString (buf, str); | |
878 | break; | |
879 | } | |
880 | ||
881 | } | |
882 | ||
883 | return FcTrue; | |
884 | } | |
885 | ||
886 | static FcBool | |
887 | escape_chars (FcFormatContext *c, | |
888 | const FcChar8 *str, | |
889 | FcStrBuf *buf) | |
890 | { | |
891 | /* XXX not UTF-8 aware */ | |
892 | ||
893 | if (!expect_char (c, '(') || | |
894 | !read_chars (c, ')') || | |
895 | !expect_char (c, ')')) | |
896 | return FcFalse; | |
897 | ||
898 | while(*str) | |
899 | { | |
900 | FcChar8 *p; | |
901 | ||
902 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word); | |
903 | if (p) | |
904 | { | |
905 | FcStrBufData (buf, str, p - str); | |
906 | FcStrBufChar (buf, c->word[0]); | |
907 | FcStrBufChar (buf, *p); | |
908 | str = p + 1; | |
909 | } | |
910 | else | |
911 | { | |
912 | FcStrBufString (buf, str); | |
913 | break; | |
914 | } | |
915 | ||
916 | } | |
917 | ||
918 | return FcTrue; | |
919 | } | |
920 | ||
921 | static FcBool | |
922 | translate_chars (FcFormatContext *c, | |
923 | const FcChar8 *str, | |
924 | FcStrBuf *buf) | |
925 | { | |
926 | char *from, *to, repeat; | |
927 | int from_len, to_len; | |
928 | ||
929 | /* XXX not UTF-8 aware */ | |
930 | ||
931 | if (!expect_char (c, '(') || | |
932 | !read_chars (c, ',') || | |
933 | !expect_char (c, ',')) | |
934 | return FcFalse; | |
935 | ||
936 | from = (char *) c->word; | |
937 | from_len = strlen (from); | |
938 | to = from + from_len + 1; | |
939 | ||
940 | /* hack: we temporarily divert c->word */ | |
941 | c->word = (FcChar8 *) to; | |
942 | if (!read_chars (c, ')')) | |
943 | { | |
944 | c->word = (FcChar8 *) from; | |
945 | return FcFalse; | |
946 | } | |
947 | c->word = (FcChar8 *) from; | |
948 | ||
949 | to_len = strlen (to); | |
950 | repeat = to[to_len - 1]; | |
951 | ||
952 | if (!expect_char (c, ')')) | |
953 | return FcFalse; | |
954 | ||
955 | while(*str) | |
956 | { | |
957 | FcChar8 *p; | |
958 | ||
959 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) from); | |
960 | if (p) | |
961 | { | |
962 | int i; | |
963 | FcStrBufData (buf, str, p - str); | |
964 | i = strchr (from, *p) - from; | |
965 | FcStrBufChar (buf, i < to_len ? to[i] : repeat); | |
966 | str = p + 1; | |
967 | } | |
968 | else | |
969 | { | |
970 | FcStrBufString (buf, str); | |
971 | break; | |
972 | } | |
973 | ||
974 | } | |
975 | ||
976 | return FcTrue; | |
977 | } | |
978 | ||
979 | static FcBool | |
980 | interpret_convert (FcFormatContext *c, | |
981 | FcStrBuf *buf, | |
982 | int start) | |
983 | { | |
984 | const FcChar8 *str; | |
985 | FcChar8 *new_str; | |
986 | FcStrBuf new_buf; | |
987 | FcChar8 buf_static[8192]; | |
988 | FcBool ret; | |
989 | ||
990 | if (!expect_char (c, '|') || | |
991 | !read_word (c)) | |
992 | return FcFalse; | |
993 | ||
994 | /* prepare the buffer */ | |
995 | FcStrBufChar (buf, '\0'); | |
996 | if (buf->failed) | |
997 | return FcFalse; | |
998 | str = buf->buf + start; | |
999 | buf->len = start; | |
1000 | ||
1001 | /* try simple converters first */ | |
1002 | if (0) { } | |
1003 | #define CONVERTER(name, func) \ | |
1004 | else if (0 == strcmp ((const char *) c->word, name))\ | |
1005 | do { new_str = func (str); ret = FcTrue; } while (0) | |
1006 | CONVERTER ("downcase", FcStrDowncase); | |
1007 | CONVERTER ("basename", FcStrBasename); | |
1008 | CONVERTER ("dirname", FcStrDirname); | |
1009 | #undef CONVERTER | |
1010 | else | |
1011 | ret = FcFalse; | |
1012 | ||
1013 | if (ret) | |
1014 | { | |
1015 | if (new_str) | |
1016 | { | |
1017 | FcStrBufString (buf, new_str); | |
1018 | free (new_str); | |
1019 | return FcTrue; | |
1020 | } | |
1021 | else | |
1022 | return FcFalse; | |
1023 | } | |
1024 | ||
1025 | FcStrBufInit (&new_buf, buf_static, sizeof (buf_static)); | |
1026 | ||
1027 | /* now try our custom converters */ | |
1028 | if (0) { } | |
1029 | #define CONVERTER(name, func) \ | |
1030 | else if (0 == strcmp ((const char *) c->word, name))\ | |
1031 | ret = func (c, str, &new_buf) | |
1032 | CONVERTER ("cescape", cescape); | |
1033 | CONVERTER ("shescape", shescape); | |
1034 | CONVERTER ("xmlescape", xmlescape); | |
1035 | CONVERTER ("delete", delete_chars); | |
1036 | CONVERTER ("escape", escape_chars); | |
1037 | CONVERTER ("translate", translate_chars); | |
1038 | #undef CONVERTER | |
1039 | else | |
1040 | ret = FcFalse; | |
1041 | ||
1042 | if (ret) | |
1043 | { | |
1044 | FcStrBufChar (&new_buf, '\0'); | |
1045 | FcStrBufString (buf, new_buf.buf); | |
1046 | } | |
1047 | else | |
1048 | message ("unknown converter \"%s\"", | |
1049 | c->word); | |
1050 | ||
1051 | FcStrBufDestroy (&new_buf); | |
1052 | ||
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | static FcBool | |
1057 | maybe_interpret_converts (FcFormatContext *c, | |
1058 | FcStrBuf *buf, | |
1059 | int start) | |
1060 | { | |
1061 | while (*c->format == '|') | |
1062 | if (!interpret_convert (c, buf, start)) | |
1063 | return FcFalse; | |
1064 | ||
1065 | return FcTrue; | |
1066 | } | |
1067 | ||
1068 | static FcBool | |
1069 | align_to_width (FcStrBuf *buf, | |
1070 | int start, | |
1071 | int width) | |
1072 | { | |
1073 | int len; | |
1074 | ||
1075 | if (buf->failed) | |
1076 | return FcFalse; | |
1077 | ||
1078 | len = buf->len - start; | |
1079 | if (len < -width) | |
1080 | { | |
1081 | /* left align */ | |
1082 | while (len++ < -width) | |
1083 | FcStrBufChar (buf, ' '); | |
1084 | } | |
1085 | else if (len < width) | |
1086 | { | |
1087 | int old_len; | |
1088 | old_len = len; | |
1089 | /* right align */ | |
1090 | while (len++ < width) | |
1091 | FcStrBufChar (buf, ' '); | |
1092 | if (buf->failed) | |
1093 | return FcFalse; | |
1094 | len = old_len; | |
1095 | memmove (buf->buf + buf->len - len, | |
1096 | buf->buf + buf->len - width, | |
1097 | len); | |
1098 | memset (buf->buf + buf->len - width, | |
1099 | ' ', | |
1100 | width - len); | |
1101 | } | |
1102 | ||
1103 | return !buf->failed; | |
1104 | } | |
1105 | static FcBool | |
1106 | interpret_percent (FcFormatContext *c, | |
1107 | FcPattern *pat, | |
1108 | FcStrBuf *buf) | |
1109 | { | |
1110 | int width, start; | |
1111 | FcBool ret; | |
1112 | ||
1113 | if (!expect_char (c, '%')) | |
1114 | return FcFalse; | |
1115 | ||
1116 | if (consume_char (c, '%')) /* "%%" */ | |
1117 | { | |
1118 | FcStrBufChar (buf, '%'); | |
1119 | return FcTrue; | |
1120 | } | |
1121 | ||
1122 | /* parse an optional width specifier */ | |
1123 | width = strtol ((const char *) c->format, (char **) &c->format, 10); | |
1124 | ||
1125 | if (!expect_char (c, '{')) | |
1126 | return FcFalse; | |
1127 | ||
1128 | start = buf->len; | |
1129 | ||
1130 | switch (*c->format) { | |
1131 | case '=': ret = interpret_builtin (c, pat, buf); break; | |
1132 | case '{': ret = interpret_subexpr (c, pat, buf); break; | |
1133 | case '+': ret = interpret_filter_in (c, pat, buf); break; | |
1134 | case '-': ret = interpret_filter_out (c, pat, buf); break; | |
1135 | case '?': ret = interpret_cond (c, pat, buf); break; | |
1136 | case '#': ret = interpret_count (c, pat, buf); break; | |
1137 | case '[': ret = interpret_enumerate (c, pat, buf); break; | |
1138 | default: ret = interpret_simple (c, pat, buf); break; | |
1139 | } | |
1140 | ||
1141 | return ret && | |
1142 | maybe_interpret_converts (c, buf, start) && | |
1143 | align_to_width (buf, start, width) && | |
1144 | expect_char (c, '}'); | |
1145 | } | |
1146 | ||
1147 | static FcBool | |
1148 | interpret_expr (FcFormatContext *c, | |
1149 | FcPattern *pat, | |
1150 | FcStrBuf *buf, | |
1151 | FcChar8 term) | |
1152 | { | |
1153 | while (*c->format && *c->format != term) | |
1154 | { | |
1155 | switch (*c->format) | |
1156 | { | |
1157 | case '\\': | |
1158 | c->format++; /* skip over '\\' */ | |
1159 | if (*c->format) | |
1160 | FcStrBufChar (buf, escaped_char (*c->format++)); | |
1161 | continue; | |
1162 | case '%': | |
1163 | if (!interpret_percent (c, pat, buf)) | |
1164 | return FcFalse; | |
1165 | continue; | |
1166 | } | |
1167 | FcStrBufChar (buf, *c->format++); | |
1168 | } | |
1169 | return FcTrue; | |
1170 | } | |
1171 | ||
1172 | static FcBool | |
1173 | FcPatternFormatToBuf (FcPattern *pat, | |
1174 | const FcChar8 *format, | |
1175 | FcStrBuf *buf) | |
1176 | { | |
1177 | FcFormatContext c; | |
1178 | FcChar8 word_static[1024]; | |
1179 | FcBool ret; | |
1180 | ||
1181 | if (!FcFormatContextInit (&c, format, word_static, sizeof (word_static))) | |
1182 | return FcFalse; | |
1183 | ||
1184 | ret = interpret_expr (&c, pat, buf, '\0'); | |
1185 | ||
1186 | FcFormatContextDone (&c); | |
1187 | ||
1188 | return ret; | |
1189 | } | |
1190 | ||
1191 | FcChar8 * | |
1192 | FcPatternFormat (FcPattern *pat, | |
1193 | const FcChar8 *format) | |
1194 | { | |
1195 | FcStrBuf buf; | |
1196 | FcChar8 buf_static[8192 - 1024]; | |
1197 | FcBool ret; | |
1198 | ||
1199 | FcStrBufInit (&buf, buf_static, sizeof (buf_static)); | |
1200 | ||
1201 | ret = FcPatternFormatToBuf (pat, format, &buf); | |
1202 | ||
1203 | if (ret) | |
1204 | return FcStrBufDone (&buf); | |
1205 | else | |
1206 | { | |
1207 | FcStrBufDestroy (&buf); | |
1208 | return NULL; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | #define __fcformat__ | |
1213 | #include "fcaliastail.h" | |
1214 | #undef __fcformat__ |