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0c93b91d | 1 | /* |
b6a23028 | 2 | * Copyright © 2008,2009 Red Hat, Inc. |
0c93b91d BE |
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 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 "fcint.h" | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <stdarg.h> | |
29 | ||
30 | ||
2017a5eb BE |
31 | /* |
32 | * Some ideas for future syntax extensions: | |
33 | * | |
d04a7507 BE |
34 | * - array enumeration using '%{[]family,familylang{expr}|decorator}' |
35 | * - langset enumeration using same syntax as array enumeration | |
2017a5eb | 36 | * - allow indexing simple tags using '%{elt[idx]}' |
d04a7507 | 37 | * - allow indexing subexprs using '%{[idx]elt1,elt2{subexpr}}' |
d4f7a4c6 | 38 | * - conditional/filtering/deletion on binding (using '(w)'/'(s)'/'(=)' notation) |
2017a5eb BE |
39 | */ |
40 | ||
d04a7507 | 41 | |
9c83a837 BE |
42 | /* fc-match needs '<unknown filename>', etc handling. */ |
43 | #define FCMATCH_FORMAT "%{file|basename}: \"%{family[0]}\" \"%{style[0]}\"" | |
d04a7507 BE |
44 | #define FCLIST_FORMAT "%{?file{%{file}: }}%{=unparse}" |
45 | ||
46 | ||
0c93b91d BE |
47 | static void |
48 | message (const char *fmt, ...) | |
49 | { | |
50 | va_list args; | |
51 | va_start (args, fmt); | |
8c31a243 | 52 | fprintf (stderr, "Fontconfig: Pattern format error: "); |
0c93b91d | 53 | vfprintf (stderr, fmt, args); |
d6506ff6 | 54 | fprintf (stderr, ".\n"); |
0c93b91d BE |
55 | va_end (args); |
56 | } | |
57 | ||
58 | ||
27b3e2dd | 59 | typedef struct _FcFormatContext |
0c93b91d | 60 | { |
27b3e2dd BE |
61 | const FcChar8 *format_orig; |
62 | const FcChar8 *format; | |
63 | int format_len; | |
2017a5eb | 64 | FcChar8 *word; |
85c7fb67 | 65 | FcBool word_allocated; |
27b3e2dd | 66 | } FcFormatContext; |
c493c3b7 | 67 | |
8c31a243 | 68 | static FcBool |
27b3e2dd | 69 | FcFormatContextInit (FcFormatContext *c, |
85c7fb67 BE |
70 | const FcChar8 *format, |
71 | FcChar8 *scratch, | |
72 | int scratch_len) | |
27b3e2dd BE |
73 | { |
74 | c->format_orig = c->format = format; | |
75 | c->format_len = strlen ((const char *) format); | |
85c7fb67 BE |
76 | |
77 | if (c->format_len < scratch_len) | |
78 | { | |
79 | c->word = scratch; | |
80 | c->word_allocated = FcFalse; | |
81 | } | |
82 | else | |
83 | { | |
84 | c->word = malloc (c->format_len + 1); | |
85 | c->word_allocated = FcTrue; | |
86 | } | |
8c31a243 | 87 | |
2017a5eb | 88 | return c->word != NULL; |
27b3e2dd | 89 | } |
c493c3b7 | 90 | |
27b3e2dd BE |
91 | static void |
92 | FcFormatContextDone (FcFormatContext *c) | |
93 | { | |
85c7fb67 | 94 | if (c && c->word_allocated) |
27b3e2dd | 95 | { |
2017a5eb | 96 | free (c->word); |
27b3e2dd BE |
97 | } |
98 | } | |
c493c3b7 | 99 | |
27b3e2dd BE |
100 | static FcBool |
101 | consume_char (FcFormatContext *c, | |
102 | FcChar8 term) | |
103 | { | |
104 | if (*c->format != term) | |
d6506ff6 BE |
105 | return FcFalse; |
106 | ||
107 | c->format++; | |
108 | return FcTrue; | |
109 | } | |
110 | ||
111 | static FcBool | |
112 | expect_char (FcFormatContext *c, | |
113 | FcChar8 term) | |
114 | { | |
115 | FcBool res = consume_char (c, term); | |
116 | if (!res) | |
117 | { | |
118 | if (c->format == c->format_orig + c->format_len) | |
119 | message ("format ended while expecting '%c'", | |
120 | term); | |
121 | else | |
122 | message ("expected '%c' at %d", | |
123 | term, c->format - c->format_orig + 1); | |
124 | } | |
125 | return res; | |
126 | } | |
127 | ||
128 | static FcBool | |
129 | FcCharIsPunct (const FcChar8 c) | |
130 | { | |
131 | if (c < '0') | |
132 | return FcTrue; | |
133 | if (c <= '9') | |
134 | return FcFalse; | |
135 | if (c < 'A') | |
136 | return FcTrue; | |
137 | if (c <= 'Z') | |
138 | return FcFalse; | |
139 | if (c < 'a') | |
140 | return FcTrue; | |
141 | if (c <= 'z') | |
142 | return FcFalse; | |
143 | if (c <= '~') | |
144 | return FcTrue; | |
145 | return FcFalse; | |
146 | } | |
147 | ||
c8f5933d BE |
148 | static char escaped_char(const char ch) |
149 | { | |
150 | switch (ch) { | |
151 | case 'a': return '\a'; | |
152 | case 'b': return '\b'; | |
153 | case 'f': return '\f'; | |
154 | case 'n': return '\n'; | |
155 | case 'r': return '\r'; | |
156 | case 't': return '\t'; | |
157 | case 'v': return '\v'; | |
158 | default: return ch; | |
159 | } | |
160 | } | |
161 | ||
d6506ff6 | 162 | static FcBool |
2017a5eb | 163 | read_word (FcFormatContext *c) |
d6506ff6 BE |
164 | { |
165 | FcChar8 *p; | |
166 | ||
2017a5eb | 167 | p = c->word; |
d6506ff6 BE |
168 | |
169 | while (*c->format) | |
170 | { | |
171 | if (*c->format == '\\') | |
172 | { | |
173 | c->format++; | |
174 | if (*c->format) | |
c8f5933d | 175 | *p++ = escaped_char (*c->format++); |
d6506ff6 BE |
176 | continue; |
177 | } | |
178 | else if (FcCharIsPunct (*c->format)) | |
179 | break; | |
180 | ||
181 | *p++ = *c->format++; | |
182 | } | |
183 | *p = '\0'; | |
184 | ||
2017a5eb | 185 | if (p == c->word) |
0c93b91d | 186 | { |
85c7fb67 | 187 | message ("expected identifier at %d", |
d6506ff6 | 188 | c->format - c->format_orig + 1); |
27b3e2dd BE |
189 | return FcFalse; |
190 | } | |
0c93b91d | 191 | |
27b3e2dd BE |
192 | return FcTrue; |
193 | } | |
0c93b91d | 194 | |
c8f5933d BE |
195 | static FcBool |
196 | read_chars (FcFormatContext *c, | |
197 | FcChar8 term) | |
198 | { | |
199 | FcChar8 *p; | |
200 | ||
201 | p = c->word; | |
202 | ||
203 | while (*c->format && *c->format != '}' && *c->format != term) | |
204 | { | |
205 | if (*c->format == '\\') | |
206 | { | |
207 | c->format++; | |
208 | if (*c->format) | |
209 | *p++ = escaped_char (*c->format++); | |
210 | continue; | |
211 | } | |
212 | ||
213 | *p++ = *c->format++; | |
214 | } | |
215 | *p = '\0'; | |
216 | ||
217 | if (p == c->word) | |
218 | { | |
219 | message ("expected character data at %d", | |
220 | c->format - c->format_orig + 1); | |
221 | return FcFalse; | |
222 | } | |
223 | ||
224 | return FcTrue; | |
225 | } | |
226 | ||
d04a7507 BE |
227 | static FcBool |
228 | FcPatternFormatToBuf (FcPattern *pat, | |
229 | const FcChar8 *format, | |
230 | FcStrBuf *buf); | |
231 | ||
d4f7a4c6 BE |
232 | static FcBool |
233 | interpret_builtin (FcFormatContext *c, | |
234 | FcPattern *pat, | |
235 | FcStrBuf *buf) | |
236 | { | |
d04a7507 BE |
237 | FcChar8 *new_str; |
238 | FcBool ret; | |
d4f7a4c6 | 239 | |
d04a7507 BE |
240 | if (!expect_char (c, '=') || |
241 | !read_word (c)) | |
d4f7a4c6 | 242 | return FcFalse; |
d04a7507 BE |
243 | |
244 | /* try simple builtins first */ | |
245 | if (0) { } | |
d4f7a4c6 BE |
246 | #define BUILTIN(name, func) \ |
247 | else if (0 == strcmp ((const char *) c->word, name))\ | |
d04a7507 BE |
248 | do { new_str = func (pat); ret = FcTrue; } while (0) |
249 | BUILTIN ("unparse", FcNameUnparse); | |
250 | /* BUILTIN ("verbose", FcPatternPrint); */ | |
251 | #undef BUILTIN | |
252 | else | |
253 | ret = FcFalse; | |
254 | ||
255 | if (ret) | |
256 | { | |
257 | if (new_str) | |
258 | { | |
259 | FcStrBufString (buf, new_str); | |
260 | free (new_str); | |
261 | return FcTrue; | |
262 | } | |
263 | else | |
264 | return FcFalse; | |
265 | } | |
266 | ||
267 | /* now try our custom formats */ | |
268 | if (0) { } | |
269 | #define BUILTIN(name, format) \ | |
270 | else if (0 == strcmp ((const char *) c->word, name))\ | |
271 | ret = FcPatternFormatToBuf (pat, (const FcChar8 *) format, buf) | |
272 | BUILTIN ("fcmatch", FCMATCH_FORMAT); | |
273 | BUILTIN ("fclist", FCLIST_FORMAT); | |
274 | #undef BUILTIN | |
275 | else | |
276 | ret = FcFalse; | |
277 | ||
278 | if (!ret) | |
279 | message ("unknown builtin \"%s\"", | |
280 | c->word); | |
281 | ||
282 | return ret; | |
d4f7a4c6 BE |
283 | } |
284 | ||
8c31a243 | 285 | static FcBool |
7717b25f BE |
286 | interpret_expr (FcFormatContext *c, |
287 | FcPattern *pat, | |
288 | FcStrBuf *buf, | |
289 | FcChar8 term); | |
d6506ff6 | 290 | |
8c31a243 BE |
291 | static FcBool |
292 | interpret_subexpr (FcFormatContext *c, | |
27b3e2dd BE |
293 | FcPattern *pat, |
294 | FcStrBuf *buf) | |
295 | { | |
8c31a243 | 296 | return expect_char (c, '{') && |
7717b25f | 297 | interpret_expr (c, pat, buf, '}') && |
8c31a243 BE |
298 | expect_char (c, '}'); |
299 | } | |
0c93b91d | 300 | |
7717b25f BE |
301 | static FcBool |
302 | maybe_interpret_subexpr (FcFormatContext *c, | |
303 | FcPattern *pat, | |
304 | FcStrBuf *buf) | |
305 | { | |
306 | return (*c->format == '{') ? | |
307 | interpret_subexpr (c, pat, buf) : | |
308 | FcTrue; | |
309 | } | |
310 | ||
311 | static FcBool | |
312 | skip_subexpr (FcFormatContext *c); | |
313 | ||
314 | static FcBool | |
315 | skip_percent (FcFormatContext *c) | |
316 | { | |
2017a5eb BE |
317 | int width; |
318 | ||
7717b25f BE |
319 | if (!expect_char (c, '%')) |
320 | return FcFalse; | |
321 | ||
322 | /* skip an optional width specifier */ | |
2017a5eb | 323 | width = strtol ((const char *) c->format, (char **) &c->format, 10); |
7717b25f BE |
324 | |
325 | if (!expect_char (c, '{')) | |
326 | return FcFalse; | |
327 | ||
328 | while(*c->format && *c->format != '}') | |
329 | { | |
330 | switch (*c->format) | |
331 | { | |
332 | case '\\': | |
333 | c->format++; /* skip over '\\' */ | |
334 | if (*c->format) | |
335 | c->format++; | |
336 | continue; | |
337 | case '{': | |
338 | if (!skip_subexpr (c)) | |
339 | return FcFalse; | |
340 | continue; | |
341 | } | |
342 | c->format++; | |
343 | } | |
344 | ||
345 | return expect_char (c, '}'); | |
346 | } | |
347 | ||
348 | static FcBool | |
349 | skip_expr (FcFormatContext *c) | |
350 | { | |
351 | while(*c->format && *c->format != '}') | |
352 | { | |
353 | switch (*c->format) | |
354 | { | |
355 | case '\\': | |
356 | c->format++; /* skip over '\\' */ | |
357 | if (*c->format) | |
358 | c->format++; | |
359 | continue; | |
360 | case '%': | |
361 | if (!skip_percent (c)) | |
362 | return FcFalse; | |
363 | continue; | |
364 | } | |
365 | c->format++; | |
366 | } | |
367 | ||
368 | return FcTrue; | |
369 | } | |
370 | ||
371 | static FcBool | |
372 | skip_subexpr (FcFormatContext *c) | |
373 | { | |
374 | return expect_char (c, '{') && | |
375 | skip_expr (c) && | |
376 | expect_char (c, '}'); | |
377 | } | |
378 | ||
379 | static FcBool | |
380 | maybe_skip_subexpr (FcFormatContext *c) | |
381 | { | |
382 | return (*c->format == '{') ? | |
383 | skip_subexpr (c) : | |
384 | FcTrue; | |
385 | } | |
386 | ||
8c31a243 BE |
387 | static FcBool |
388 | interpret_filter (FcFormatContext *c, | |
389 | FcPattern *pat, | |
390 | FcStrBuf *buf) | |
391 | { | |
392 | FcObjectSet *os; | |
393 | FcPattern *subpat; | |
394 | ||
395 | if (!expect_char (c, '+')) | |
396 | return FcFalse; | |
397 | ||
398 | os = FcObjectSetCreate (); | |
399 | if (!os) | |
400 | return FcFalse; | |
401 | ||
402 | do | |
403 | { | |
2017a5eb BE |
404 | if (!read_word (c) || |
405 | !FcObjectSetAdd (os, (const char *) c->word)) | |
8c31a243 BE |
406 | { |
407 | FcObjectSetDestroy (os); | |
408 | return FcFalse; | |
409 | } | |
410 | } | |
411 | while (consume_char (c, ',')); | |
412 | ||
413 | subpat = FcPatternFilter (pat, os); | |
414 | FcObjectSetDestroy (os); | |
415 | ||
416 | if (!subpat || | |
417 | !interpret_subexpr (c, subpat, buf)) | |
418 | return FcFalse; | |
419 | ||
420 | FcPatternDestroy (subpat); | |
421 | return FcTrue; | |
422 | } | |
423 | ||
424 | static FcBool | |
425 | interpret_delete (FcFormatContext *c, | |
426 | FcPattern *pat, | |
427 | FcStrBuf *buf) | |
428 | { | |
429 | FcPattern *subpat; | |
430 | ||
431 | if (!expect_char (c, '-')) | |
432 | return FcFalse; | |
433 | ||
434 | subpat = FcPatternDuplicate (pat); | |
435 | if (!subpat) | |
436 | return FcFalse; | |
437 | ||
438 | do | |
439 | { | |
2017a5eb | 440 | if (!read_word (c)) |
8c31a243 BE |
441 | { |
442 | FcPatternDestroy (subpat); | |
443 | return FcFalse; | |
444 | } | |
445 | ||
2017a5eb | 446 | FcPatternDel (subpat, (const char *) c->word); |
8c31a243 BE |
447 | } |
448 | while (consume_char (c, ',')); | |
449 | ||
450 | if (!interpret_subexpr (c, subpat, buf)) | |
451 | return FcFalse; | |
452 | ||
453 | FcPatternDestroy (subpat); | |
454 | return FcTrue; | |
455 | } | |
456 | ||
7717b25f | 457 | static FcBool |
2017a5eb BE |
458 | interpret_cond (FcFormatContext *c, |
459 | FcPattern *pat, | |
460 | FcStrBuf *buf) | |
7717b25f BE |
461 | { |
462 | FcBool pass; | |
463 | ||
464 | if (!expect_char (c, '?')) | |
465 | return FcFalse; | |
466 | ||
467 | pass = FcTrue; | |
468 | ||
469 | do | |
470 | { | |
471 | FcBool negate; | |
472 | FcValue v; | |
473 | ||
474 | negate = consume_char (c, '!'); | |
475 | ||
2017a5eb | 476 | if (!read_word (c)) |
7717b25f BE |
477 | return FcFalse; |
478 | ||
479 | pass = pass && | |
480 | (negate ^ | |
2017a5eb BE |
481 | (FcResultMatch == FcPatternGet (pat, |
482 | (const char *) c->word, | |
483 | 0, &v))); | |
7717b25f BE |
484 | } |
485 | while (consume_char (c, ',')); | |
486 | ||
487 | if (pass) | |
488 | { | |
489 | if (!interpret_subexpr (c, pat, buf) || | |
490 | !maybe_skip_subexpr (c)) | |
491 | return FcFalse; | |
492 | } | |
493 | else | |
494 | { | |
495 | if (!skip_subexpr (c) || | |
496 | !maybe_interpret_subexpr (c, pat, buf)) | |
497 | return FcFalse; | |
498 | } | |
499 | ||
500 | return FcTrue; | |
501 | } | |
502 | ||
b6a23028 BE |
503 | static FcBool |
504 | interpret_count (FcFormatContext *c, | |
505 | FcPattern *pat, | |
506 | FcStrBuf *buf) | |
507 | { | |
508 | int count; | |
509 | FcPatternElt *e; | |
510 | FcChar8 buf_static[64]; | |
511 | ||
512 | if (!expect_char (c, '#')) | |
513 | return FcFalse; | |
514 | ||
515 | if (!read_word (c)) | |
516 | return FcFalse; | |
517 | ||
518 | count = 0; | |
519 | e = FcPatternObjectFindElt (pat, | |
520 | FcObjectFromName ((const char *) c->word)); | |
521 | if (e) | |
522 | { | |
523 | FcValueListPtr l; | |
524 | count++; | |
525 | for (l = FcPatternEltValues(e); | |
526 | l->next; | |
527 | l = l->next) | |
528 | count++; | |
529 | } | |
530 | ||
c8f5933d | 531 | snprintf ((char *) buf_static, sizeof (buf_static), "%d", count); |
b6a23028 BE |
532 | FcStrBufString (buf, buf_static); |
533 | ||
534 | return FcTrue; | |
535 | } | |
536 | ||
537 | static FcBool | |
538 | interpret_simple (FcFormatContext *c, | |
539 | FcPattern *pat, | |
540 | FcStrBuf *buf) | |
541 | { | |
542 | FcPatternElt *e; | |
543 | FcBool add_colon = FcFalse; | |
544 | FcBool add_elt_name = FcFalse; | |
9c83a837 | 545 | int idx; |
b6a23028 BE |
546 | |
547 | if (consume_char (c, ':')) | |
548 | add_colon = FcTrue; | |
549 | ||
550 | if (!read_word (c)) | |
551 | return FcFalse; | |
552 | ||
9c83a837 BE |
553 | idx = -1; |
554 | if (consume_char (c, '[')) | |
555 | { | |
556 | idx = strtol ((const char *) c->format, (char **) &c->format, 10); | |
557 | if (idx < 0) | |
558 | { | |
559 | message ("expected non-negative number at %d", | |
560 | c->format-1 - c->format_orig + 1); | |
561 | return FcFalse; | |
562 | } | |
563 | expect_char (c, ']'); | |
564 | } | |
565 | ||
b6a23028 BE |
566 | if (consume_char (c, '=')) |
567 | add_elt_name = FcTrue; | |
568 | ||
569 | e = FcPatternObjectFindElt (pat, | |
570 | FcObjectFromName ((const char *) c->word)); | |
571 | if (e) | |
572 | { | |
573 | FcValueListPtr l; | |
574 | ||
575 | if (add_colon) | |
576 | FcStrBufChar (buf, ':'); | |
577 | if (add_elt_name) | |
578 | { | |
579 | FcStrBufString (buf, c->word); | |
580 | FcStrBufChar (buf, '='); | |
581 | } | |
582 | ||
583 | l = FcPatternEltValues(e); | |
9c83a837 BE |
584 | |
585 | if (idx != -1) | |
586 | { | |
587 | while (l && idx > 0) | |
588 | { | |
589 | l = FcValueListNext(l); | |
590 | idx--; | |
591 | } | |
592 | if (l && idx == 0) | |
593 | { | |
594 | if (!FcNameUnparseValue (buf, &l->value, '\0')) | |
595 | return FcFalse; | |
596 | } | |
597 | else goto notfound; | |
598 | } | |
599 | else | |
600 | { | |
601 | FcNameUnparseValueList (buf, l, '\0'); | |
602 | } | |
603 | } | |
604 | else | |
605 | notfound: | |
606 | { | |
b6a23028 BE |
607 | } |
608 | ||
609 | return FcTrue; | |
610 | } | |
611 | ||
85c7fb67 BE |
612 | static FcBool |
613 | cescape (FcFormatContext *c, | |
d04a7507 BE |
614 | const FcChar8 *str, |
615 | FcStrBuf *buf) | |
ced38254 | 616 | { |
ced38254 BE |
617 | while(*str) |
618 | { | |
619 | switch (*str) | |
620 | { | |
621 | case '\\': | |
622 | case '"': | |
85c7fb67 | 623 | FcStrBufChar (buf, '\\'); |
ced38254 BE |
624 | break; |
625 | } | |
85c7fb67 | 626 | FcStrBufChar (buf, *str++); |
ced38254 | 627 | } |
85c7fb67 | 628 | return FcTrue; |
ced38254 BE |
629 | } |
630 | ||
85c7fb67 BE |
631 | static FcBool |
632 | shescape (FcFormatContext *c, | |
d04a7507 BE |
633 | const FcChar8 *str, |
634 | FcStrBuf *buf) | |
ced38254 | 635 | { |
85c7fb67 | 636 | FcStrBufChar (buf, '\''); |
ced38254 BE |
637 | while(*str) |
638 | { | |
639 | if (*str == '\'') | |
85c7fb67 | 640 | FcStrBufString (buf, (const FcChar8 *) "'\\''"); |
ced38254 | 641 | else |
85c7fb67 | 642 | FcStrBufChar (buf, *str); |
ced38254 BE |
643 | str++; |
644 | } | |
85c7fb67 BE |
645 | FcStrBufChar (buf, '\''); |
646 | return FcTrue; | |
ced38254 BE |
647 | } |
648 | ||
85c7fb67 BE |
649 | static FcBool |
650 | xmlescape (FcFormatContext *c, | |
d04a7507 BE |
651 | const FcChar8 *str, |
652 | FcStrBuf *buf) | |
ced38254 | 653 | { |
ced38254 BE |
654 | while(*str) |
655 | { | |
656 | switch (*str) | |
657 | { | |
85c7fb67 BE |
658 | case '&': FcStrBufString (buf, (const FcChar8 *) "&"); break; |
659 | case '<': FcStrBufString (buf, (const FcChar8 *) "<"); break; | |
660 | case '>': FcStrBufString (buf, (const FcChar8 *) ">"); break; | |
661 | default: FcStrBufChar (buf, *str); break; | |
ced38254 BE |
662 | } |
663 | str++; | |
664 | } | |
85c7fb67 | 665 | return FcTrue; |
ced38254 BE |
666 | } |
667 | ||
85c7fb67 | 668 | static FcBool |
c8f5933d | 669 | delete_chars (FcFormatContext *c, |
d04a7507 BE |
670 | const FcChar8 *str, |
671 | FcStrBuf *buf) | |
c8f5933d | 672 | { |
c8f5933d BE |
673 | /* XXX not UTF-8 aware */ |
674 | ||
675 | if (!expect_char (c, '(') || | |
676 | !read_chars (c, ')') || | |
677 | !expect_char (c, ')')) | |
85c7fb67 | 678 | return FcFalse; |
c8f5933d | 679 | |
c8f5933d BE |
680 | while(*str) |
681 | { | |
682 | FcChar8 *p; | |
683 | ||
684 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word); | |
685 | if (p) | |
686 | { | |
85c7fb67 | 687 | FcStrBufData (buf, str, p - str); |
c8f5933d BE |
688 | str = p + 1; |
689 | } | |
690 | else | |
691 | { | |
85c7fb67 | 692 | FcStrBufString (buf, str); |
c8f5933d BE |
693 | break; |
694 | } | |
695 | ||
696 | } | |
85c7fb67 BE |
697 | |
698 | return FcTrue; | |
c8f5933d BE |
699 | } |
700 | ||
85c7fb67 | 701 | static FcBool |
c8f5933d | 702 | escape_chars (FcFormatContext *c, |
d04a7507 BE |
703 | const FcChar8 *str, |
704 | FcStrBuf *buf) | |
c8f5933d | 705 | { |
c8f5933d BE |
706 | /* XXX not UTF-8 aware */ |
707 | ||
708 | if (!expect_char (c, '(') || | |
709 | !read_chars (c, ')') || | |
710 | !expect_char (c, ')')) | |
85c7fb67 | 711 | return FcFalse; |
c8f5933d | 712 | |
c8f5933d BE |
713 | while(*str) |
714 | { | |
715 | FcChar8 *p; | |
716 | ||
717 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word); | |
718 | if (p) | |
719 | { | |
85c7fb67 BE |
720 | FcStrBufData (buf, str, p - str); |
721 | FcStrBufChar (buf, c->word[0]); | |
722 | FcStrBufChar (buf, *p); | |
c8f5933d BE |
723 | str = p + 1; |
724 | } | |
725 | else | |
726 | { | |
85c7fb67 | 727 | FcStrBufString (buf, str); |
c8f5933d BE |
728 | break; |
729 | } | |
730 | ||
731 | } | |
85c7fb67 BE |
732 | |
733 | return FcTrue; | |
c8f5933d BE |
734 | } |
735 | ||
85c7fb67 | 736 | static FcBool |
c8f5933d | 737 | translate_chars (FcFormatContext *c, |
d04a7507 BE |
738 | const FcChar8 *str, |
739 | FcStrBuf *buf) | |
c8f5933d | 740 | { |
c8f5933d BE |
741 | char *from, *to, repeat; |
742 | int from_len, to_len; | |
743 | ||
744 | /* XXX not UTF-8 aware */ | |
745 | ||
746 | if (!expect_char (c, '(') || | |
747 | !read_chars (c, ',') || | |
748 | !expect_char (c, ',')) | |
85c7fb67 | 749 | return FcFalse; |
c8f5933d BE |
750 | |
751 | from = (char *) c->word; | |
752 | from_len = strlen (from); | |
753 | to = from + from_len + 1; | |
754 | ||
755 | /* hack: we temporarily diverge c->word */ | |
756 | c->word = (FcChar8 *) to; | |
757 | if (!read_chars (c, ')')) | |
758 | { | |
759 | c->word = (FcChar8 *) from; | |
760 | return FcFalse; | |
761 | } | |
762 | c->word = (FcChar8 *) from; | |
763 | ||
764 | to_len = strlen (to); | |
765 | repeat = to[to_len - 1]; | |
766 | ||
767 | if (!expect_char (c, ')')) | |
768 | return FcFalse; | |
769 | ||
c8f5933d BE |
770 | while(*str) |
771 | { | |
772 | FcChar8 *p; | |
773 | ||
774 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) from); | |
775 | if (p) | |
776 | { | |
777 | int i; | |
85c7fb67 | 778 | FcStrBufData (buf, str, p - str); |
c8f5933d | 779 | i = strchr (from, *p) - from; |
85c7fb67 | 780 | FcStrBufChar (buf, i < to_len ? to[i] : repeat); |
c8f5933d BE |
781 | str = p + 1; |
782 | } | |
783 | else | |
784 | { | |
85c7fb67 | 785 | FcStrBufString (buf, str); |
c8f5933d BE |
786 | break; |
787 | } | |
788 | ||
789 | } | |
85c7fb67 BE |
790 | |
791 | return FcTrue; | |
c8f5933d BE |
792 | } |
793 | ||
85c7fb67 BE |
794 | static FcBool |
795 | interpret_convert (FcFormatContext *c, | |
796 | FcStrBuf *buf, | |
797 | int start) | |
2017a5eb | 798 | { |
85c7fb67 BE |
799 | const FcChar8 *str; |
800 | FcChar8 *new_str; | |
801 | FcStrBuf new_buf; | |
802 | FcChar8 buf_static[8192]; | |
803 | FcBool ret; | |
804 | ||
d04a7507 BE |
805 | if (!expect_char (c, '|') || |
806 | !read_word (c)) | |
85c7fb67 BE |
807 | return FcFalse; |
808 | ||
d04a7507 | 809 | /* prepare the buffer */ |
85c7fb67 BE |
810 | FcStrBufChar (buf, '\0'); |
811 | if (buf->failed) | |
812 | return FcFalse; | |
813 | str = buf->buf + start; | |
814 | buf->len = start; | |
815 | ||
85c7fb67 BE |
816 | /* try simple converters first */ |
817 | if (0) { } | |
ced38254 BE |
818 | #define CONVERTER(name, func) \ |
819 | else if (0 == strcmp ((const char *) c->word, name))\ | |
85c7fb67 | 820 | do { new_str = func (str); ret = FcTrue; } while (0) |
c8f5933d BE |
821 | CONVERTER ("downcase", FcStrDowncase); |
822 | CONVERTER ("basename", FcStrBasename); | |
823 | CONVERTER ("dirname", FcStrDirname); | |
85c7fb67 BE |
824 | #undef CONVERTER |
825 | else | |
826 | ret = FcFalse; | |
827 | ||
828 | if (ret) | |
829 | { | |
830 | if (new_str) | |
831 | { | |
85c7fb67 BE |
832 | FcStrBufString (buf, new_str); |
833 | free (new_str); | |
834 | return FcTrue; | |
835 | } | |
836 | else | |
837 | return FcFalse; | |
838 | } | |
839 | ||
840 | FcStrBufInit (&new_buf, buf_static, sizeof (buf_static)); | |
841 | ||
842 | /* now try our custom converters */ | |
843 | if (0) { } | |
844 | #define CONVERTER(name, func) \ | |
845 | else if (0 == strcmp ((const char *) c->word, name))\ | |
d04a7507 | 846 | ret = func (c, str, &new_buf) |
85c7fb67 BE |
847 | CONVERTER ("cescape", cescape); |
848 | CONVERTER ("shescape", shescape); | |
849 | CONVERTER ("xmlescape", xmlescape); | |
850 | CONVERTER ("delete", delete_chars); | |
851 | CONVERTER ("escape", escape_chars); | |
852 | CONVERTER ("translate", translate_chars); | |
853 | #undef CONVERTER | |
854 | else | |
855 | ret = FcFalse; | |
856 | ||
857 | if (ret) | |
858 | { | |
859 | FcStrBufChar (&new_buf, '\0'); | |
860 | FcStrBufString (buf, new_buf.buf); | |
861 | } | |
862 | else | |
863 | message ("unknown converter \"%s\"", | |
864 | c->word); | |
865 | ||
866 | FcStrBufDestroy (&new_buf); | |
867 | ||
868 | return ret; | |
2017a5eb BE |
869 | } |
870 | ||
871 | static FcBool | |
872 | maybe_interpret_converts (FcFormatContext *c, | |
873 | FcStrBuf *buf, | |
874 | int start) | |
875 | { | |
85c7fb67 BE |
876 | while (*c->format == '|') |
877 | if (!interpret_convert (c, buf, start)) | |
2017a5eb BE |
878 | return FcFalse; |
879 | ||
2017a5eb BE |
880 | return FcTrue; |
881 | } | |
882 | ||
883 | static FcBool | |
884 | align_to_width (FcStrBuf *buf, | |
885 | int start, | |
886 | int width) | |
887 | { | |
888 | int len; | |
889 | ||
890 | if (buf->failed) | |
891 | return FcFalse; | |
892 | ||
893 | len = buf->len - start; | |
894 | if (len < -width) | |
895 | { | |
896 | /* left align */ | |
897 | while (len++ < -width) | |
898 | FcStrBufChar (buf, ' '); | |
899 | } | |
900 | else if (len < width) | |
901 | { | |
902 | int old_len; | |
903 | old_len = len; | |
904 | /* right align */ | |
905 | while (len++ < width) | |
906 | FcStrBufChar (buf, ' '); | |
907 | if (buf->failed) | |
908 | return FcFalse; | |
909 | len = old_len; | |
910 | memmove (buf->buf + buf->len - len, | |
911 | buf->buf + buf->len - width, | |
912 | len); | |
913 | memset (buf->buf + buf->len - width, | |
914 | ' ', | |
915 | width - len); | |
916 | } | |
917 | ||
918 | return !buf->failed; | |
919 | } | |
8c31a243 BE |
920 | static FcBool |
921 | interpret_percent (FcFormatContext *c, | |
922 | FcPattern *pat, | |
923 | FcStrBuf *buf) | |
924 | { | |
2017a5eb BE |
925 | int width, start; |
926 | FcBool ret; | |
8c31a243 BE |
927 | |
928 | if (!expect_char (c, '%')) | |
929 | return FcFalse; | |
930 | ||
931 | if (consume_char (c, '%')) /* "%%" */ | |
932 | { | |
933 | FcStrBufChar (buf, '%'); | |
934 | return FcTrue; | |
935 | } | |
936 | ||
937 | /* parse an optional width specifier */ | |
938 | width = strtol ((const char *) c->format, (char **) &c->format, 10); | |
939 | ||
8c31a243 BE |
940 | if (!expect_char (c, '{')) |
941 | return FcFalse; | |
942 | ||
2017a5eb | 943 | start = buf->len; |
7717b25f | 944 | |
2017a5eb | 945 | switch (*c->format) { |
d4f7a4c6 | 946 | case '=': ret = interpret_builtin (c, pat, buf); break; |
2017a5eb BE |
947 | case '{': ret = interpret_subexpr (c, pat, buf); break; |
948 | case '+': ret = interpret_filter (c, pat, buf); break; | |
949 | case '-': ret = interpret_delete (c, pat, buf); break; | |
950 | case '?': ret = interpret_cond (c, pat, buf); break; | |
b6a23028 | 951 | case '#': ret = interpret_count (c, pat, buf); break; |
2017a5eb | 952 | default: ret = interpret_simple (c, pat, buf); break; |
0c93b91d | 953 | } |
c493c3b7 | 954 | |
2017a5eb BE |
955 | return ret && |
956 | maybe_interpret_converts (c, buf, start) && | |
957 | align_to_width (buf, start, width) && | |
958 | expect_char (c, '}'); | |
0c93b91d BE |
959 | } |
960 | ||
8c31a243 | 961 | static FcBool |
7717b25f BE |
962 | interpret_expr (FcFormatContext *c, |
963 | FcPattern *pat, | |
964 | FcStrBuf *buf, | |
965 | FcChar8 term) | |
0c93b91d | 966 | { |
7717b25f | 967 | while (*c->format && *c->format != term) |
0c93b91d | 968 | { |
27b3e2dd | 969 | switch (*c->format) |
0c93b91d BE |
970 | { |
971 | case '\\': | |
27b3e2dd BE |
972 | c->format++; /* skip over '\\' */ |
973 | if (*c->format) | |
974 | FcStrBufChar (buf, escaped_char (*c->format++)); | |
0c93b91d BE |
975 | continue; |
976 | case '%': | |
8c31a243 BE |
977 | if (!interpret_percent (c, pat, buf)) |
978 | return FcFalse; | |
0c93b91d BE |
979 | continue; |
980 | } | |
27b3e2dd | 981 | FcStrBufChar (buf, *c->format++); |
0c93b91d | 982 | } |
8c31a243 | 983 | return FcTrue; |
0c93b91d BE |
984 | } |
985 | ||
d04a7507 BE |
986 | static FcBool |
987 | FcPatternFormatToBuf (FcPattern *pat, | |
988 | const FcChar8 *format, | |
989 | FcStrBuf *buf) | |
990 | { | |
991 | FcFormatContext c; | |
992 | FcChar8 word_static[1024]; | |
993 | FcBool ret; | |
994 | ||
995 | if (!FcFormatContextInit (&c, format, word_static, sizeof (word_static))) | |
996 | return FcFalse; | |
997 | ||
998 | ret = interpret_expr (&c, pat, buf, '\0'); | |
999 | ||
1000 | FcFormatContextDone (&c); | |
1001 | ||
1002 | return ret; | |
1003 | } | |
1004 | ||
0c93b91d | 1005 | FcChar8 * |
d04a7507 BE |
1006 | FcPatternFormat (FcPattern *pat, |
1007 | const FcChar8 *format) | |
0c93b91d | 1008 | { |
ced38254 | 1009 | FcStrBuf buf; |
85c7fb67 | 1010 | FcChar8 buf_static[8192 - 1024]; |
ced38254 | 1011 | FcBool ret; |
0c93b91d | 1012 | |
ced38254 | 1013 | FcStrBufInit (&buf, buf_static, sizeof (buf_static)); |
0c93b91d | 1014 | |
d04a7507 | 1015 | ret = FcPatternFormatToBuf (pat, format, &buf); |
0c93b91d | 1016 | |
8c31a243 BE |
1017 | if (ret) |
1018 | return FcStrBufDone (&buf); | |
1019 | else | |
1020 | { | |
1021 | FcStrBufDestroy (&buf); | |
1022 | return NULL; | |
1023 | } | |
0c93b91d BE |
1024 | } |
1025 | ||
1026 | #define __fcformat__ | |
1027 | #include "fcaliastail.h" | |
1028 | #undef __fcformat__ |