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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 | |
d04a7507 | 36 | * - allow indexing subexprs using '%{[idx]elt1,elt2{subexpr}}' |
d4f7a4c6 | 37 | * - conditional/filtering/deletion on binding (using '(w)'/'(s)'/'(=)' notation) |
2017a5eb BE |
38 | */ |
39 | ||
d04a7507 | 40 | |
0673ef38 | 41 | #define FCMATCH_FORMAT "%{file:-<unknown filename>|basename}: \"%{family[0]:-<unknown family>}\" \"%{style[0]:-<unknown style>}\"" |
d04a7507 BE |
42 | #define FCLIST_FORMAT "%{?file{%{file}: }}%{=unparse}" |
43 | ||
44 | ||
0c93b91d BE |
45 | static void |
46 | message (const char *fmt, ...) | |
47 | { | |
48 | va_list args; | |
49 | va_start (args, fmt); | |
8c31a243 | 50 | fprintf (stderr, "Fontconfig: Pattern format error: "); |
0c93b91d | 51 | vfprintf (stderr, fmt, args); |
d6506ff6 | 52 | fprintf (stderr, ".\n"); |
0c93b91d BE |
53 | va_end (args); |
54 | } | |
55 | ||
56 | ||
27b3e2dd | 57 | typedef struct _FcFormatContext |
0c93b91d | 58 | { |
27b3e2dd BE |
59 | const FcChar8 *format_orig; |
60 | const FcChar8 *format; | |
61 | int format_len; | |
2017a5eb | 62 | FcChar8 *word; |
85c7fb67 | 63 | FcBool word_allocated; |
27b3e2dd | 64 | } FcFormatContext; |
c493c3b7 | 65 | |
8c31a243 | 66 | static FcBool |
27b3e2dd | 67 | FcFormatContextInit (FcFormatContext *c, |
85c7fb67 BE |
68 | const FcChar8 *format, |
69 | FcChar8 *scratch, | |
70 | int scratch_len) | |
27b3e2dd BE |
71 | { |
72 | c->format_orig = c->format = format; | |
73 | c->format_len = strlen ((const char *) format); | |
85c7fb67 BE |
74 | |
75 | if (c->format_len < scratch_len) | |
76 | { | |
77 | c->word = scratch; | |
78 | c->word_allocated = FcFalse; | |
79 | } | |
80 | else | |
81 | { | |
82 | c->word = malloc (c->format_len + 1); | |
83 | c->word_allocated = FcTrue; | |
84 | } | |
8c31a243 | 85 | |
2017a5eb | 86 | return c->word != NULL; |
27b3e2dd | 87 | } |
c493c3b7 | 88 | |
27b3e2dd BE |
89 | static void |
90 | FcFormatContextDone (FcFormatContext *c) | |
91 | { | |
85c7fb67 | 92 | if (c && c->word_allocated) |
27b3e2dd | 93 | { |
2017a5eb | 94 | free (c->word); |
27b3e2dd BE |
95 | } |
96 | } | |
c493c3b7 | 97 | |
27b3e2dd BE |
98 | static FcBool |
99 | consume_char (FcFormatContext *c, | |
100 | FcChar8 term) | |
101 | { | |
102 | if (*c->format != term) | |
d6506ff6 BE |
103 | return FcFalse; |
104 | ||
105 | c->format++; | |
106 | return FcTrue; | |
107 | } | |
108 | ||
109 | static FcBool | |
110 | expect_char (FcFormatContext *c, | |
111 | FcChar8 term) | |
112 | { | |
113 | FcBool res = consume_char (c, term); | |
114 | if (!res) | |
115 | { | |
116 | if (c->format == c->format_orig + c->format_len) | |
117 | message ("format ended while expecting '%c'", | |
118 | term); | |
119 | else | |
120 | message ("expected '%c' at %d", | |
121 | term, c->format - c->format_orig + 1); | |
122 | } | |
123 | return res; | |
124 | } | |
125 | ||
126 | static FcBool | |
127 | FcCharIsPunct (const FcChar8 c) | |
128 | { | |
129 | if (c < '0') | |
130 | return FcTrue; | |
131 | if (c <= '9') | |
132 | return FcFalse; | |
133 | if (c < 'A') | |
134 | return FcTrue; | |
135 | if (c <= 'Z') | |
136 | return FcFalse; | |
137 | if (c < 'a') | |
138 | return FcTrue; | |
139 | if (c <= 'z') | |
140 | return FcFalse; | |
141 | if (c <= '~') | |
142 | return FcTrue; | |
143 | return FcFalse; | |
144 | } | |
145 | ||
c8f5933d BE |
146 | static char escaped_char(const char ch) |
147 | { | |
148 | switch (ch) { | |
149 | case 'a': return '\a'; | |
150 | case 'b': return '\b'; | |
151 | case 'f': return '\f'; | |
152 | case 'n': return '\n'; | |
153 | case 'r': return '\r'; | |
154 | case 't': return '\t'; | |
155 | case 'v': return '\v'; | |
156 | default: return ch; | |
157 | } | |
158 | } | |
159 | ||
d6506ff6 | 160 | static FcBool |
2017a5eb | 161 | read_word (FcFormatContext *c) |
d6506ff6 BE |
162 | { |
163 | FcChar8 *p; | |
164 | ||
2017a5eb | 165 | p = c->word; |
d6506ff6 BE |
166 | |
167 | while (*c->format) | |
168 | { | |
169 | if (*c->format == '\\') | |
170 | { | |
171 | c->format++; | |
172 | if (*c->format) | |
c8f5933d | 173 | *p++ = escaped_char (*c->format++); |
d6506ff6 BE |
174 | continue; |
175 | } | |
176 | else if (FcCharIsPunct (*c->format)) | |
177 | break; | |
178 | ||
179 | *p++ = *c->format++; | |
180 | } | |
181 | *p = '\0'; | |
182 | ||
2017a5eb | 183 | if (p == c->word) |
0c93b91d | 184 | { |
85c7fb67 | 185 | message ("expected identifier at %d", |
d6506ff6 | 186 | c->format - c->format_orig + 1); |
27b3e2dd BE |
187 | return FcFalse; |
188 | } | |
0c93b91d | 189 | |
27b3e2dd BE |
190 | return FcTrue; |
191 | } | |
0c93b91d | 192 | |
c8f5933d BE |
193 | static FcBool |
194 | read_chars (FcFormatContext *c, | |
195 | FcChar8 term) | |
196 | { | |
197 | FcChar8 *p; | |
198 | ||
199 | p = c->word; | |
200 | ||
201 | while (*c->format && *c->format != '}' && *c->format != term) | |
202 | { | |
203 | if (*c->format == '\\') | |
204 | { | |
205 | c->format++; | |
206 | if (*c->format) | |
207 | *p++ = escaped_char (*c->format++); | |
208 | continue; | |
209 | } | |
210 | ||
211 | *p++ = *c->format++; | |
212 | } | |
213 | *p = '\0'; | |
214 | ||
215 | if (p == c->word) | |
216 | { | |
217 | message ("expected character data at %d", | |
218 | c->format - c->format_orig + 1); | |
219 | return FcFalse; | |
220 | } | |
221 | ||
222 | return FcTrue; | |
223 | } | |
224 | ||
d04a7507 BE |
225 | static FcBool |
226 | FcPatternFormatToBuf (FcPattern *pat, | |
227 | const FcChar8 *format, | |
228 | FcStrBuf *buf); | |
229 | ||
d4f7a4c6 BE |
230 | static FcBool |
231 | interpret_builtin (FcFormatContext *c, | |
232 | FcPattern *pat, | |
233 | FcStrBuf *buf) | |
234 | { | |
d04a7507 BE |
235 | FcChar8 *new_str; |
236 | FcBool ret; | |
d4f7a4c6 | 237 | |
d04a7507 BE |
238 | if (!expect_char (c, '=') || |
239 | !read_word (c)) | |
d4f7a4c6 | 240 | return FcFalse; |
d04a7507 BE |
241 | |
242 | /* try simple builtins first */ | |
243 | if (0) { } | |
d4f7a4c6 BE |
244 | #define BUILTIN(name, func) \ |
245 | else if (0 == strcmp ((const char *) c->word, name))\ | |
d04a7507 BE |
246 | do { new_str = func (pat); ret = FcTrue; } while (0) |
247 | BUILTIN ("unparse", FcNameUnparse); | |
0673ef38 | 248 | /* BUILTIN ("verbose", FcPatternPrint); XXX */ |
d04a7507 BE |
249 | #undef BUILTIN |
250 | else | |
251 | ret = FcFalse; | |
252 | ||
253 | if (ret) | |
254 | { | |
255 | if (new_str) | |
256 | { | |
257 | FcStrBufString (buf, new_str); | |
258 | free (new_str); | |
259 | return FcTrue; | |
260 | } | |
261 | else | |
262 | return FcFalse; | |
263 | } | |
264 | ||
265 | /* now try our custom formats */ | |
266 | if (0) { } | |
267 | #define BUILTIN(name, format) \ | |
268 | else if (0 == strcmp ((const char *) c->word, name))\ | |
269 | ret = FcPatternFormatToBuf (pat, (const FcChar8 *) format, buf) | |
270 | BUILTIN ("fcmatch", FCMATCH_FORMAT); | |
271 | BUILTIN ("fclist", FCLIST_FORMAT); | |
272 | #undef BUILTIN | |
273 | else | |
274 | ret = FcFalse; | |
275 | ||
276 | if (!ret) | |
277 | message ("unknown builtin \"%s\"", | |
278 | c->word); | |
279 | ||
280 | return ret; | |
d4f7a4c6 BE |
281 | } |
282 | ||
8c31a243 | 283 | static FcBool |
7717b25f BE |
284 | interpret_expr (FcFormatContext *c, |
285 | FcPattern *pat, | |
286 | FcStrBuf *buf, | |
287 | FcChar8 term); | |
d6506ff6 | 288 | |
8c31a243 BE |
289 | static FcBool |
290 | interpret_subexpr (FcFormatContext *c, | |
27b3e2dd BE |
291 | FcPattern *pat, |
292 | FcStrBuf *buf) | |
293 | { | |
8c31a243 | 294 | return expect_char (c, '{') && |
7717b25f | 295 | interpret_expr (c, pat, buf, '}') && |
8c31a243 BE |
296 | expect_char (c, '}'); |
297 | } | |
0c93b91d | 298 | |
7717b25f BE |
299 | static FcBool |
300 | maybe_interpret_subexpr (FcFormatContext *c, | |
301 | FcPattern *pat, | |
302 | FcStrBuf *buf) | |
303 | { | |
304 | return (*c->format == '{') ? | |
305 | interpret_subexpr (c, pat, buf) : | |
306 | FcTrue; | |
307 | } | |
308 | ||
309 | static FcBool | |
310 | skip_subexpr (FcFormatContext *c); | |
311 | ||
312 | static FcBool | |
313 | skip_percent (FcFormatContext *c) | |
314 | { | |
2017a5eb BE |
315 | int width; |
316 | ||
7717b25f BE |
317 | if (!expect_char (c, '%')) |
318 | return FcFalse; | |
319 | ||
320 | /* skip an optional width specifier */ | |
2017a5eb | 321 | width = strtol ((const char *) c->format, (char **) &c->format, 10); |
7717b25f BE |
322 | |
323 | if (!expect_char (c, '{')) | |
324 | return FcFalse; | |
325 | ||
326 | while(*c->format && *c->format != '}') | |
327 | { | |
328 | switch (*c->format) | |
329 | { | |
330 | case '\\': | |
331 | c->format++; /* skip over '\\' */ | |
332 | if (*c->format) | |
333 | c->format++; | |
334 | continue; | |
335 | case '{': | |
336 | if (!skip_subexpr (c)) | |
337 | return FcFalse; | |
338 | continue; | |
339 | } | |
340 | c->format++; | |
341 | } | |
342 | ||
343 | return expect_char (c, '}'); | |
344 | } | |
345 | ||
346 | static FcBool | |
347 | skip_expr (FcFormatContext *c) | |
348 | { | |
349 | while(*c->format && *c->format != '}') | |
350 | { | |
351 | switch (*c->format) | |
352 | { | |
353 | case '\\': | |
354 | c->format++; /* skip over '\\' */ | |
355 | if (*c->format) | |
356 | c->format++; | |
357 | continue; | |
358 | case '%': | |
359 | if (!skip_percent (c)) | |
360 | return FcFalse; | |
361 | continue; | |
362 | } | |
363 | c->format++; | |
364 | } | |
365 | ||
366 | return FcTrue; | |
367 | } | |
368 | ||
369 | static FcBool | |
370 | skip_subexpr (FcFormatContext *c) | |
371 | { | |
372 | return expect_char (c, '{') && | |
373 | skip_expr (c) && | |
374 | expect_char (c, '}'); | |
375 | } | |
376 | ||
377 | static FcBool | |
378 | maybe_skip_subexpr (FcFormatContext *c) | |
379 | { | |
380 | return (*c->format == '{') ? | |
381 | skip_subexpr (c) : | |
382 | FcTrue; | |
383 | } | |
384 | ||
8c31a243 BE |
385 | static FcBool |
386 | interpret_filter (FcFormatContext *c, | |
387 | FcPattern *pat, | |
388 | FcStrBuf *buf) | |
389 | { | |
390 | FcObjectSet *os; | |
391 | FcPattern *subpat; | |
392 | ||
393 | if (!expect_char (c, '+')) | |
394 | return FcFalse; | |
395 | ||
396 | os = FcObjectSetCreate (); | |
397 | if (!os) | |
398 | return FcFalse; | |
399 | ||
400 | do | |
401 | { | |
2017a5eb BE |
402 | if (!read_word (c) || |
403 | !FcObjectSetAdd (os, (const char *) c->word)) | |
8c31a243 BE |
404 | { |
405 | FcObjectSetDestroy (os); | |
406 | return FcFalse; | |
407 | } | |
408 | } | |
409 | while (consume_char (c, ',')); | |
410 | ||
411 | subpat = FcPatternFilter (pat, os); | |
412 | FcObjectSetDestroy (os); | |
413 | ||
414 | if (!subpat || | |
415 | !interpret_subexpr (c, subpat, buf)) | |
416 | return FcFalse; | |
417 | ||
418 | FcPatternDestroy (subpat); | |
419 | return FcTrue; | |
420 | } | |
421 | ||
422 | static FcBool | |
423 | interpret_delete (FcFormatContext *c, | |
424 | FcPattern *pat, | |
425 | FcStrBuf *buf) | |
426 | { | |
427 | FcPattern *subpat; | |
428 | ||
429 | if (!expect_char (c, '-')) | |
430 | return FcFalse; | |
431 | ||
432 | subpat = FcPatternDuplicate (pat); | |
433 | if (!subpat) | |
434 | return FcFalse; | |
435 | ||
436 | do | |
437 | { | |
2017a5eb | 438 | if (!read_word (c)) |
8c31a243 BE |
439 | { |
440 | FcPatternDestroy (subpat); | |
441 | return FcFalse; | |
442 | } | |
443 | ||
2017a5eb | 444 | FcPatternDel (subpat, (const char *) c->word); |
8c31a243 BE |
445 | } |
446 | while (consume_char (c, ',')); | |
447 | ||
448 | if (!interpret_subexpr (c, subpat, buf)) | |
449 | return FcFalse; | |
450 | ||
451 | FcPatternDestroy (subpat); | |
452 | return FcTrue; | |
453 | } | |
454 | ||
7717b25f | 455 | static FcBool |
2017a5eb BE |
456 | interpret_cond (FcFormatContext *c, |
457 | FcPattern *pat, | |
458 | FcStrBuf *buf) | |
7717b25f BE |
459 | { |
460 | FcBool pass; | |
461 | ||
462 | if (!expect_char (c, '?')) | |
463 | return FcFalse; | |
464 | ||
465 | pass = FcTrue; | |
466 | ||
467 | do | |
468 | { | |
469 | FcBool negate; | |
470 | FcValue v; | |
471 | ||
472 | negate = consume_char (c, '!'); | |
473 | ||
2017a5eb | 474 | if (!read_word (c)) |
7717b25f BE |
475 | return FcFalse; |
476 | ||
477 | pass = pass && | |
478 | (negate ^ | |
2017a5eb BE |
479 | (FcResultMatch == FcPatternGet (pat, |
480 | (const char *) c->word, | |
481 | 0, &v))); | |
7717b25f BE |
482 | } |
483 | while (consume_char (c, ',')); | |
484 | ||
485 | if (pass) | |
486 | { | |
487 | if (!interpret_subexpr (c, pat, buf) || | |
488 | !maybe_skip_subexpr (c)) | |
489 | return FcFalse; | |
490 | } | |
491 | else | |
492 | { | |
493 | if (!skip_subexpr (c) || | |
494 | !maybe_interpret_subexpr (c, pat, buf)) | |
495 | return FcFalse; | |
496 | } | |
497 | ||
498 | return FcTrue; | |
499 | } | |
500 | ||
b6a23028 BE |
501 | static FcBool |
502 | interpret_count (FcFormatContext *c, | |
503 | FcPattern *pat, | |
504 | FcStrBuf *buf) | |
505 | { | |
506 | int count; | |
507 | FcPatternElt *e; | |
508 | FcChar8 buf_static[64]; | |
509 | ||
510 | if (!expect_char (c, '#')) | |
511 | return FcFalse; | |
512 | ||
513 | if (!read_word (c)) | |
514 | return FcFalse; | |
515 | ||
516 | count = 0; | |
517 | e = FcPatternObjectFindElt (pat, | |
518 | FcObjectFromName ((const char *) c->word)); | |
519 | if (e) | |
520 | { | |
521 | FcValueListPtr l; | |
522 | count++; | |
523 | for (l = FcPatternEltValues(e); | |
524 | l->next; | |
525 | l = l->next) | |
526 | count++; | |
527 | } | |
528 | ||
c8f5933d | 529 | snprintf ((char *) buf_static, sizeof (buf_static), "%d", count); |
b6a23028 BE |
530 | FcStrBufString (buf, buf_static); |
531 | ||
532 | return FcTrue; | |
533 | } | |
534 | ||
535 | static FcBool | |
536 | interpret_simple (FcFormatContext *c, | |
537 | FcPattern *pat, | |
538 | FcStrBuf *buf) | |
539 | { | |
540 | FcPatternElt *e; | |
541 | FcBool add_colon = FcFalse; | |
542 | FcBool add_elt_name = FcFalse; | |
9c83a837 | 543 | int idx; |
0673ef38 | 544 | FcChar8 *else_string; |
b6a23028 BE |
545 | |
546 | if (consume_char (c, ':')) | |
547 | add_colon = FcTrue; | |
548 | ||
549 | if (!read_word (c)) | |
550 | return FcFalse; | |
551 | ||
9c83a837 BE |
552 | idx = -1; |
553 | if (consume_char (c, '[')) | |
554 | { | |
555 | idx = strtol ((const char *) c->format, (char **) &c->format, 10); | |
556 | if (idx < 0) | |
557 | { | |
558 | message ("expected non-negative number at %d", | |
559 | c->format-1 - c->format_orig + 1); | |
560 | return FcFalse; | |
561 | } | |
562 | expect_char (c, ']'); | |
563 | } | |
564 | ||
b6a23028 BE |
565 | if (consume_char (c, '=')) |
566 | add_elt_name = FcTrue; | |
567 | ||
0673ef38 BE |
568 | /* modifiers */ |
569 | else_string = NULL; | |
570 | if (consume_char (c, ':')) | |
571 | { | |
572 | FcChar8 *orig; | |
573 | /* divert the c->word for now */ | |
574 | orig = c->word; | |
575 | c->word = c->word + strlen ((const char *) c->word) + 1; | |
576 | /* for now we just support 'default value' */ | |
577 | if (!expect_char (c, '-') || | |
578 | !read_chars (c, '\0')) | |
579 | { | |
580 | c->word = orig; | |
581 | return FcFalse; | |
582 | } | |
583 | else_string = c->word; | |
584 | c->word = orig; | |
585 | } | |
586 | ||
b6a23028 BE |
587 | e = FcPatternObjectFindElt (pat, |
588 | FcObjectFromName ((const char *) c->word)); | |
589 | if (e) | |
590 | { | |
591 | FcValueListPtr l; | |
592 | ||
593 | if (add_colon) | |
594 | FcStrBufChar (buf, ':'); | |
595 | if (add_elt_name) | |
596 | { | |
597 | FcStrBufString (buf, c->word); | |
598 | FcStrBufChar (buf, '='); | |
599 | } | |
600 | ||
601 | l = FcPatternEltValues(e); | |
9c83a837 BE |
602 | |
603 | if (idx != -1) | |
604 | { | |
605 | while (l && idx > 0) | |
606 | { | |
607 | l = FcValueListNext(l); | |
608 | idx--; | |
609 | } | |
610 | if (l && idx == 0) | |
611 | { | |
612 | if (!FcNameUnparseValue (buf, &l->value, '\0')) | |
613 | return FcFalse; | |
614 | } | |
615 | else goto notfound; | |
616 | } | |
617 | else | |
618 | { | |
619 | FcNameUnparseValueList (buf, l, '\0'); | |
620 | } | |
621 | } | |
622 | else | |
623 | notfound: | |
624 | { | |
0673ef38 BE |
625 | if (else_string) |
626 | printf ("%s", else_string); | |
b6a23028 BE |
627 | } |
628 | ||
629 | return FcTrue; | |
630 | } | |
631 | ||
85c7fb67 BE |
632 | static FcBool |
633 | cescape (FcFormatContext *c, | |
d04a7507 BE |
634 | const FcChar8 *str, |
635 | FcStrBuf *buf) | |
ced38254 | 636 | { |
ced38254 BE |
637 | while(*str) |
638 | { | |
639 | switch (*str) | |
640 | { | |
641 | case '\\': | |
642 | case '"': | |
85c7fb67 | 643 | FcStrBufChar (buf, '\\'); |
ced38254 BE |
644 | break; |
645 | } | |
85c7fb67 | 646 | FcStrBufChar (buf, *str++); |
ced38254 | 647 | } |
85c7fb67 | 648 | return FcTrue; |
ced38254 BE |
649 | } |
650 | ||
85c7fb67 BE |
651 | static FcBool |
652 | shescape (FcFormatContext *c, | |
d04a7507 BE |
653 | const FcChar8 *str, |
654 | FcStrBuf *buf) | |
ced38254 | 655 | { |
85c7fb67 | 656 | FcStrBufChar (buf, '\''); |
ced38254 BE |
657 | while(*str) |
658 | { | |
659 | if (*str == '\'') | |
85c7fb67 | 660 | FcStrBufString (buf, (const FcChar8 *) "'\\''"); |
ced38254 | 661 | else |
85c7fb67 | 662 | FcStrBufChar (buf, *str); |
ced38254 BE |
663 | str++; |
664 | } | |
85c7fb67 BE |
665 | FcStrBufChar (buf, '\''); |
666 | return FcTrue; | |
ced38254 BE |
667 | } |
668 | ||
85c7fb67 BE |
669 | static FcBool |
670 | xmlescape (FcFormatContext *c, | |
d04a7507 BE |
671 | const FcChar8 *str, |
672 | FcStrBuf *buf) | |
ced38254 | 673 | { |
ced38254 BE |
674 | while(*str) |
675 | { | |
676 | switch (*str) | |
677 | { | |
85c7fb67 BE |
678 | case '&': FcStrBufString (buf, (const FcChar8 *) "&"); break; |
679 | case '<': FcStrBufString (buf, (const FcChar8 *) "<"); break; | |
680 | case '>': FcStrBufString (buf, (const FcChar8 *) ">"); break; | |
681 | default: FcStrBufChar (buf, *str); break; | |
ced38254 BE |
682 | } |
683 | str++; | |
684 | } | |
85c7fb67 | 685 | return FcTrue; |
ced38254 BE |
686 | } |
687 | ||
85c7fb67 | 688 | static FcBool |
c8f5933d | 689 | delete_chars (FcFormatContext *c, |
d04a7507 BE |
690 | const FcChar8 *str, |
691 | FcStrBuf *buf) | |
c8f5933d | 692 | { |
c8f5933d BE |
693 | /* XXX not UTF-8 aware */ |
694 | ||
695 | if (!expect_char (c, '(') || | |
696 | !read_chars (c, ')') || | |
697 | !expect_char (c, ')')) | |
85c7fb67 | 698 | return FcFalse; |
c8f5933d | 699 | |
c8f5933d BE |
700 | while(*str) |
701 | { | |
702 | FcChar8 *p; | |
703 | ||
704 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word); | |
705 | if (p) | |
706 | { | |
85c7fb67 | 707 | FcStrBufData (buf, str, p - str); |
c8f5933d BE |
708 | str = p + 1; |
709 | } | |
710 | else | |
711 | { | |
85c7fb67 | 712 | FcStrBufString (buf, str); |
c8f5933d BE |
713 | break; |
714 | } | |
715 | ||
716 | } | |
85c7fb67 BE |
717 | |
718 | return FcTrue; | |
c8f5933d BE |
719 | } |
720 | ||
85c7fb67 | 721 | static FcBool |
c8f5933d | 722 | escape_chars (FcFormatContext *c, |
d04a7507 BE |
723 | const FcChar8 *str, |
724 | FcStrBuf *buf) | |
c8f5933d | 725 | { |
c8f5933d BE |
726 | /* XXX not UTF-8 aware */ |
727 | ||
728 | if (!expect_char (c, '(') || | |
729 | !read_chars (c, ')') || | |
730 | !expect_char (c, ')')) | |
85c7fb67 | 731 | return FcFalse; |
c8f5933d | 732 | |
c8f5933d BE |
733 | while(*str) |
734 | { | |
735 | FcChar8 *p; | |
736 | ||
737 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) c->word); | |
738 | if (p) | |
739 | { | |
85c7fb67 BE |
740 | FcStrBufData (buf, str, p - str); |
741 | FcStrBufChar (buf, c->word[0]); | |
742 | FcStrBufChar (buf, *p); | |
c8f5933d BE |
743 | str = p + 1; |
744 | } | |
745 | else | |
746 | { | |
85c7fb67 | 747 | FcStrBufString (buf, str); |
c8f5933d BE |
748 | break; |
749 | } | |
750 | ||
751 | } | |
85c7fb67 BE |
752 | |
753 | return FcTrue; | |
c8f5933d BE |
754 | } |
755 | ||
85c7fb67 | 756 | static FcBool |
c8f5933d | 757 | translate_chars (FcFormatContext *c, |
d04a7507 BE |
758 | const FcChar8 *str, |
759 | FcStrBuf *buf) | |
c8f5933d | 760 | { |
c8f5933d BE |
761 | char *from, *to, repeat; |
762 | int from_len, to_len; | |
763 | ||
764 | /* XXX not UTF-8 aware */ | |
765 | ||
766 | if (!expect_char (c, '(') || | |
767 | !read_chars (c, ',') || | |
768 | !expect_char (c, ',')) | |
85c7fb67 | 769 | return FcFalse; |
c8f5933d BE |
770 | |
771 | from = (char *) c->word; | |
772 | from_len = strlen (from); | |
773 | to = from + from_len + 1; | |
774 | ||
0673ef38 | 775 | /* hack: we temporarily divert c->word */ |
c8f5933d BE |
776 | c->word = (FcChar8 *) to; |
777 | if (!read_chars (c, ')')) | |
778 | { | |
779 | c->word = (FcChar8 *) from; | |
780 | return FcFalse; | |
781 | } | |
782 | c->word = (FcChar8 *) from; | |
783 | ||
784 | to_len = strlen (to); | |
785 | repeat = to[to_len - 1]; | |
786 | ||
787 | if (!expect_char (c, ')')) | |
788 | return FcFalse; | |
789 | ||
c8f5933d BE |
790 | while(*str) |
791 | { | |
792 | FcChar8 *p; | |
793 | ||
794 | p = (FcChar8 *) strpbrk ((const char *) str, (const char *) from); | |
795 | if (p) | |
796 | { | |
797 | int i; | |
85c7fb67 | 798 | FcStrBufData (buf, str, p - str); |
c8f5933d | 799 | i = strchr (from, *p) - from; |
85c7fb67 | 800 | FcStrBufChar (buf, i < to_len ? to[i] : repeat); |
c8f5933d BE |
801 | str = p + 1; |
802 | } | |
803 | else | |
804 | { | |
85c7fb67 | 805 | FcStrBufString (buf, str); |
c8f5933d BE |
806 | break; |
807 | } | |
808 | ||
809 | } | |
85c7fb67 BE |
810 | |
811 | return FcTrue; | |
c8f5933d BE |
812 | } |
813 | ||
85c7fb67 BE |
814 | static FcBool |
815 | interpret_convert (FcFormatContext *c, | |
816 | FcStrBuf *buf, | |
817 | int start) | |
2017a5eb | 818 | { |
85c7fb67 BE |
819 | const FcChar8 *str; |
820 | FcChar8 *new_str; | |
821 | FcStrBuf new_buf; | |
822 | FcChar8 buf_static[8192]; | |
823 | FcBool ret; | |
824 | ||
d04a7507 BE |
825 | if (!expect_char (c, '|') || |
826 | !read_word (c)) | |
85c7fb67 BE |
827 | return FcFalse; |
828 | ||
d04a7507 | 829 | /* prepare the buffer */ |
85c7fb67 BE |
830 | FcStrBufChar (buf, '\0'); |
831 | if (buf->failed) | |
832 | return FcFalse; | |
833 | str = buf->buf + start; | |
834 | buf->len = start; | |
835 | ||
85c7fb67 BE |
836 | /* try simple converters first */ |
837 | if (0) { } | |
ced38254 BE |
838 | #define CONVERTER(name, func) \ |
839 | else if (0 == strcmp ((const char *) c->word, name))\ | |
85c7fb67 | 840 | do { new_str = func (str); ret = FcTrue; } while (0) |
c8f5933d BE |
841 | CONVERTER ("downcase", FcStrDowncase); |
842 | CONVERTER ("basename", FcStrBasename); | |
843 | CONVERTER ("dirname", FcStrDirname); | |
85c7fb67 BE |
844 | #undef CONVERTER |
845 | else | |
846 | ret = FcFalse; | |
847 | ||
848 | if (ret) | |
849 | { | |
850 | if (new_str) | |
851 | { | |
85c7fb67 BE |
852 | FcStrBufString (buf, new_str); |
853 | free (new_str); | |
854 | return FcTrue; | |
855 | } | |
856 | else | |
857 | return FcFalse; | |
858 | } | |
859 | ||
860 | FcStrBufInit (&new_buf, buf_static, sizeof (buf_static)); | |
861 | ||
862 | /* now try our custom converters */ | |
863 | if (0) { } | |
864 | #define CONVERTER(name, func) \ | |
865 | else if (0 == strcmp ((const char *) c->word, name))\ | |
d04a7507 | 866 | ret = func (c, str, &new_buf) |
85c7fb67 BE |
867 | CONVERTER ("cescape", cescape); |
868 | CONVERTER ("shescape", shescape); | |
869 | CONVERTER ("xmlescape", xmlescape); | |
870 | CONVERTER ("delete", delete_chars); | |
871 | CONVERTER ("escape", escape_chars); | |
872 | CONVERTER ("translate", translate_chars); | |
873 | #undef CONVERTER | |
874 | else | |
875 | ret = FcFalse; | |
876 | ||
877 | if (ret) | |
878 | { | |
879 | FcStrBufChar (&new_buf, '\0'); | |
880 | FcStrBufString (buf, new_buf.buf); | |
881 | } | |
882 | else | |
883 | message ("unknown converter \"%s\"", | |
884 | c->word); | |
885 | ||
886 | FcStrBufDestroy (&new_buf); | |
887 | ||
888 | return ret; | |
2017a5eb BE |
889 | } |
890 | ||
891 | static FcBool | |
892 | maybe_interpret_converts (FcFormatContext *c, | |
893 | FcStrBuf *buf, | |
894 | int start) | |
895 | { | |
85c7fb67 BE |
896 | while (*c->format == '|') |
897 | if (!interpret_convert (c, buf, start)) | |
2017a5eb BE |
898 | return FcFalse; |
899 | ||
2017a5eb BE |
900 | return FcTrue; |
901 | } | |
902 | ||
903 | static FcBool | |
904 | align_to_width (FcStrBuf *buf, | |
905 | int start, | |
906 | int width) | |
907 | { | |
908 | int len; | |
909 | ||
910 | if (buf->failed) | |
911 | return FcFalse; | |
912 | ||
913 | len = buf->len - start; | |
914 | if (len < -width) | |
915 | { | |
916 | /* left align */ | |
917 | while (len++ < -width) | |
918 | FcStrBufChar (buf, ' '); | |
919 | } | |
920 | else if (len < width) | |
921 | { | |
922 | int old_len; | |
923 | old_len = len; | |
924 | /* right align */ | |
925 | while (len++ < width) | |
926 | FcStrBufChar (buf, ' '); | |
927 | if (buf->failed) | |
928 | return FcFalse; | |
929 | len = old_len; | |
930 | memmove (buf->buf + buf->len - len, | |
931 | buf->buf + buf->len - width, | |
932 | len); | |
933 | memset (buf->buf + buf->len - width, | |
934 | ' ', | |
935 | width - len); | |
936 | } | |
937 | ||
938 | return !buf->failed; | |
939 | } | |
8c31a243 BE |
940 | static FcBool |
941 | interpret_percent (FcFormatContext *c, | |
942 | FcPattern *pat, | |
943 | FcStrBuf *buf) | |
944 | { | |
2017a5eb BE |
945 | int width, start; |
946 | FcBool ret; | |
8c31a243 BE |
947 | |
948 | if (!expect_char (c, '%')) | |
949 | return FcFalse; | |
950 | ||
951 | if (consume_char (c, '%')) /* "%%" */ | |
952 | { | |
953 | FcStrBufChar (buf, '%'); | |
954 | return FcTrue; | |
955 | } | |
956 | ||
957 | /* parse an optional width specifier */ | |
958 | width = strtol ((const char *) c->format, (char **) &c->format, 10); | |
959 | ||
8c31a243 BE |
960 | if (!expect_char (c, '{')) |
961 | return FcFalse; | |
962 | ||
2017a5eb | 963 | start = buf->len; |
7717b25f | 964 | |
2017a5eb | 965 | switch (*c->format) { |
d4f7a4c6 | 966 | case '=': ret = interpret_builtin (c, pat, buf); break; |
2017a5eb BE |
967 | case '{': ret = interpret_subexpr (c, pat, buf); break; |
968 | case '+': ret = interpret_filter (c, pat, buf); break; | |
969 | case '-': ret = interpret_delete (c, pat, buf); break; | |
970 | case '?': ret = interpret_cond (c, pat, buf); break; | |
b6a23028 | 971 | case '#': ret = interpret_count (c, pat, buf); break; |
2017a5eb | 972 | default: ret = interpret_simple (c, pat, buf); break; |
0c93b91d | 973 | } |
c493c3b7 | 974 | |
2017a5eb BE |
975 | return ret && |
976 | maybe_interpret_converts (c, buf, start) && | |
977 | align_to_width (buf, start, width) && | |
978 | expect_char (c, '}'); | |
0c93b91d BE |
979 | } |
980 | ||
8c31a243 | 981 | static FcBool |
7717b25f BE |
982 | interpret_expr (FcFormatContext *c, |
983 | FcPattern *pat, | |
984 | FcStrBuf *buf, | |
985 | FcChar8 term) | |
0c93b91d | 986 | { |
7717b25f | 987 | while (*c->format && *c->format != term) |
0c93b91d | 988 | { |
27b3e2dd | 989 | switch (*c->format) |
0c93b91d BE |
990 | { |
991 | case '\\': | |
27b3e2dd BE |
992 | c->format++; /* skip over '\\' */ |
993 | if (*c->format) | |
994 | FcStrBufChar (buf, escaped_char (*c->format++)); | |
0c93b91d BE |
995 | continue; |
996 | case '%': | |
8c31a243 BE |
997 | if (!interpret_percent (c, pat, buf)) |
998 | return FcFalse; | |
0c93b91d BE |
999 | continue; |
1000 | } | |
27b3e2dd | 1001 | FcStrBufChar (buf, *c->format++); |
0c93b91d | 1002 | } |
8c31a243 | 1003 | return FcTrue; |
0c93b91d BE |
1004 | } |
1005 | ||
d04a7507 BE |
1006 | static FcBool |
1007 | FcPatternFormatToBuf (FcPattern *pat, | |
1008 | const FcChar8 *format, | |
1009 | FcStrBuf *buf) | |
1010 | { | |
1011 | FcFormatContext c; | |
1012 | FcChar8 word_static[1024]; | |
1013 | FcBool ret; | |
1014 | ||
1015 | if (!FcFormatContextInit (&c, format, word_static, sizeof (word_static))) | |
1016 | return FcFalse; | |
1017 | ||
1018 | ret = interpret_expr (&c, pat, buf, '\0'); | |
1019 | ||
1020 | FcFormatContextDone (&c); | |
1021 | ||
1022 | return ret; | |
1023 | } | |
1024 | ||
0c93b91d | 1025 | FcChar8 * |
d04a7507 BE |
1026 | FcPatternFormat (FcPattern *pat, |
1027 | const FcChar8 *format) | |
0c93b91d | 1028 | { |
ced38254 | 1029 | FcStrBuf buf; |
85c7fb67 | 1030 | FcChar8 buf_static[8192 - 1024]; |
ced38254 | 1031 | FcBool ret; |
0c93b91d | 1032 | |
ced38254 | 1033 | FcStrBufInit (&buf, buf_static, sizeof (buf_static)); |
0c93b91d | 1034 | |
d04a7507 | 1035 | ret = FcPatternFormatToBuf (pat, format, &buf); |
0c93b91d | 1036 | |
8c31a243 BE |
1037 | if (ret) |
1038 | return FcStrBufDone (&buf); | |
1039 | else | |
1040 | { | |
1041 | FcStrBufDestroy (&buf); | |
1042 | return NULL; | |
1043 | } | |
0c93b91d BE |
1044 | } |
1045 | ||
1046 | #define __fcformat__ | |
1047 | #include "fcaliastail.h" | |
1048 | #undef __fcformat__ |