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