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ca1d1d23 JB |
1 | /* String search routines for GNU Emacs. |
2 | Copyright (C) 1985, 1986, 1987, 1992 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include "lisp.h" | |
23 | #include "syntax.h" | |
24 | #include "buffer.h" | |
25 | #include "commands.h" | |
4746118a | 26 | |
ca1d1d23 JB |
27 | #include <sys/types.h> |
28 | #include "regex.h" | |
29 | ||
30 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
31 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
32 | ||
33 | /* We compile regexps into this buffer and then use it for searching. */ | |
34 | ||
35 | struct re_pattern_buffer searchbuf; | |
36 | ||
37 | char search_fastmap[0400]; | |
38 | ||
39 | /* Last regexp we compiled */ | |
40 | ||
41 | Lisp_Object last_regexp; | |
42 | ||
4746118a JB |
43 | /* Every call to re_match, etc., must pass &search_regs as the regs |
44 | argument unless you can show it is unnecessary (i.e., if re_match | |
45 | is certainly going to be called again before region-around-match | |
46 | can be called). | |
47 | ||
48 | Since the registers are now dynamically allocated, we need to make | |
49 | sure not to refer to the Nth register before checking that it has | |
1113d9db JB |
50 | been allocated by checking search_regs.num_regs. |
51 | ||
52 | The regex code keeps track of whether it has allocated the search | |
53 | buffer using bits in searchbuf. This means that whenever you | |
54 | compile a new pattern, it completely forgets whether it has | |
55 | allocated any registers, and will allocate new registers the next | |
56 | time you call a searching or matching function. Therefore, we need | |
57 | to call re_set_registers after compiling a new pattern or after | |
58 | setting the match registers, so that the regex functions will be | |
59 | able to free or re-allocate it properly. */ | |
ca1d1d23 JB |
60 | static struct re_registers search_regs; |
61 | ||
daa37602 JB |
62 | /* The buffer in which the last search was performed, or |
63 | Qt if the last search was done in a string; | |
64 | Qnil if no searching has been done yet. */ | |
65 | static Lisp_Object last_thing_searched; | |
ca1d1d23 JB |
66 | |
67 | /* error condition signalled when regexp compile_pattern fails */ | |
68 | ||
69 | Lisp_Object Qinvalid_regexp; | |
70 | ||
71 | static void | |
72 | matcher_overflow () | |
73 | { | |
74 | error ("Stack overflow in regexp matcher"); | |
75 | } | |
76 | ||
77 | #ifdef __STDC__ | |
78 | #define CONST const | |
79 | #else | |
80 | #define CONST | |
81 | #endif | |
82 | ||
83 | /* Compile a regexp and signal a Lisp error if anything goes wrong. */ | |
84 | ||
1113d9db | 85 | compile_pattern (pattern, bufp, regp, translate) |
ca1d1d23 JB |
86 | Lisp_Object pattern; |
87 | struct re_pattern_buffer *bufp; | |
1113d9db | 88 | struct re_registers *regp; |
ca1d1d23 JB |
89 | char *translate; |
90 | { | |
91 | CONST char *val; | |
92 | Lisp_Object dummy; | |
93 | ||
94 | if (EQ (pattern, last_regexp) | |
95 | && translate == bufp->translate) | |
96 | return; | |
1113d9db | 97 | |
ca1d1d23 JB |
98 | last_regexp = Qnil; |
99 | bufp->translate = translate; | |
100 | val = re_compile_pattern ((char *) XSTRING (pattern)->data, | |
101 | XSTRING (pattern)->size, | |
102 | bufp); | |
103 | if (val) | |
104 | { | |
105 | dummy = build_string (val); | |
106 | while (1) | |
107 | Fsignal (Qinvalid_regexp, Fcons (dummy, Qnil)); | |
108 | } | |
1113d9db | 109 | |
ca1d1d23 | 110 | last_regexp = pattern; |
1113d9db JB |
111 | |
112 | /* Advise the searching functions about the space we have allocated | |
113 | for register data. */ | |
ebb9e16f JB |
114 | if (regp) |
115 | re_set_registers (bufp, regp, regp->num_regs, regp->start, regp->end); | |
1113d9db | 116 | |
ca1d1d23 JB |
117 | return; |
118 | } | |
119 | ||
120 | /* Error condition used for failing searches */ | |
121 | Lisp_Object Qsearch_failed; | |
122 | ||
123 | Lisp_Object | |
124 | signal_failure (arg) | |
125 | Lisp_Object arg; | |
126 | { | |
127 | Fsignal (Qsearch_failed, Fcons (arg, Qnil)); | |
128 | return Qnil; | |
129 | } | |
130 | \f | |
131 | DEFUN ("looking-at", Flooking_at, Slooking_at, 1, 1, 0, | |
e065a56e JB |
132 | "Return t if text after point matches regular expression PAT.\n\ |
133 | This function modifies the match data that `match-beginning',\n\ | |
134 | `match-end' and `match-data' access; save and restore the match\n\ | |
fe99283d | 135 | data if you want to preserve them.") |
ca1d1d23 JB |
136 | (string) |
137 | Lisp_Object string; | |
138 | { | |
139 | Lisp_Object val; | |
140 | unsigned char *p1, *p2; | |
141 | int s1, s2; | |
142 | register int i; | |
143 | ||
144 | CHECK_STRING (string, 0); | |
1113d9db | 145 | compile_pattern (string, &searchbuf, &search_regs, |
ca1d1d23 JB |
146 | !NILP (current_buffer->case_fold_search) ? DOWNCASE_TABLE : 0); |
147 | ||
148 | immediate_quit = 1; | |
149 | QUIT; /* Do a pending quit right away, to avoid paradoxical behavior */ | |
150 | ||
151 | /* Get pointers and sizes of the two strings | |
152 | that make up the visible portion of the buffer. */ | |
153 | ||
154 | p1 = BEGV_ADDR; | |
155 | s1 = GPT - BEGV; | |
156 | p2 = GAP_END_ADDR; | |
157 | s2 = ZV - GPT; | |
158 | if (s1 < 0) | |
159 | { | |
160 | p2 = p1; | |
161 | s2 = ZV - BEGV; | |
162 | s1 = 0; | |
163 | } | |
164 | if (s2 < 0) | |
165 | { | |
166 | s1 = ZV - BEGV; | |
167 | s2 = 0; | |
168 | } | |
169 | ||
170 | i = re_match_2 (&searchbuf, (char *) p1, s1, (char *) p2, s2, | |
171 | point - BEGV, &search_regs, | |
172 | ZV - BEGV); | |
173 | if (i == -2) | |
174 | matcher_overflow (); | |
175 | ||
176 | val = (0 <= i ? Qt : Qnil); | |
4746118a | 177 | for (i = 0; i < search_regs.num_regs; i++) |
ca1d1d23 JB |
178 | if (search_regs.start[i] >= 0) |
179 | { | |
180 | search_regs.start[i] += BEGV; | |
181 | search_regs.end[i] += BEGV; | |
182 | } | |
daa37602 | 183 | XSET (last_thing_searched, Lisp_Buffer, current_buffer); |
ca1d1d23 JB |
184 | immediate_quit = 0; |
185 | return val; | |
186 | } | |
187 | ||
188 | DEFUN ("string-match", Fstring_match, Sstring_match, 2, 3, 0, | |
189 | "Return index of start of first match for REGEXP in STRING, or nil.\n\ | |
190 | If third arg START is non-nil, start search at that index in STRING.\n\ | |
191 | For index of first char beyond the match, do (match-end 0).\n\ | |
192 | `match-end' and `match-beginning' also give indices of substrings\n\ | |
193 | matched by parenthesis constructs in the pattern.") | |
194 | (regexp, string, start) | |
195 | Lisp_Object regexp, string, start; | |
196 | { | |
197 | int val; | |
198 | int s; | |
199 | ||
200 | CHECK_STRING (regexp, 0); | |
201 | CHECK_STRING (string, 1); | |
202 | ||
203 | if (NILP (start)) | |
204 | s = 0; | |
205 | else | |
206 | { | |
207 | int len = XSTRING (string)->size; | |
208 | ||
209 | CHECK_NUMBER (start, 2); | |
210 | s = XINT (start); | |
211 | if (s < 0 && -s <= len) | |
212 | s = len - s; | |
213 | else if (0 > s || s > len) | |
214 | args_out_of_range (string, start); | |
215 | } | |
216 | ||
1113d9db | 217 | compile_pattern (regexp, &searchbuf, &search_regs, |
ca1d1d23 JB |
218 | !NILP (current_buffer->case_fold_search) ? DOWNCASE_TABLE : 0); |
219 | immediate_quit = 1; | |
220 | val = re_search (&searchbuf, (char *) XSTRING (string)->data, | |
221 | XSTRING (string)->size, s, XSTRING (string)->size - s, | |
222 | &search_regs); | |
223 | immediate_quit = 0; | |
daa37602 | 224 | last_thing_searched = Qt; |
ca1d1d23 JB |
225 | if (val == -2) |
226 | matcher_overflow (); | |
227 | if (val < 0) return Qnil; | |
228 | return make_number (val); | |
229 | } | |
e59a8453 RS |
230 | |
231 | /* Match REGEXP against STRING, searching all of STRING, | |
232 | and return the index of the match, or negative on failure. | |
233 | This does not clobber the match data. */ | |
234 | ||
235 | int | |
236 | fast_string_match (regexp, string) | |
237 | Lisp_Object regexp, string; | |
238 | { | |
239 | int val; | |
240 | ||
241 | compile_pattern (regexp, &searchbuf, 0, 0); | |
242 | immediate_quit = 1; | |
243 | val = re_search (&searchbuf, (char *) XSTRING (string)->data, | |
244 | XSTRING (string)->size, 0, XSTRING (string)->size, | |
245 | 0); | |
246 | immediate_quit = 0; | |
247 | return val; | |
248 | } | |
ca1d1d23 | 249 | \f |
ffd56f97 JB |
250 | /* Search for COUNT instances of the character TARGET, starting at START. |
251 | If COUNT is negative, search backwards. | |
252 | ||
253 | If we find COUNT instances, set *SHORTAGE to zero, and return the | |
5bfe95c9 RS |
254 | position after the COUNTth match. Note that for reverse motion |
255 | this is not the same as the usual convention for Emacs motion commands. | |
ffd56f97 JB |
256 | |
257 | If we don't find COUNT instances before reaching the end of the | |
258 | buffer (or the beginning, if scanning backwards), set *SHORTAGE to | |
259 | the number of TARGETs left unfound, and return the end of the | |
260 | buffer we bumped up against. */ | |
261 | ||
262 | scan_buffer (target, start, count, shortage) | |
263 | int *shortage, start; | |
264 | register int count, target; | |
ca1d1d23 | 265 | { |
ffd56f97 JB |
266 | int limit = ((count > 0) ? ZV - 1 : BEGV); |
267 | int direction = ((count > 0) ? 1 : -1); | |
268 | ||
269 | register unsigned char *cursor; | |
ca1d1d23 | 270 | unsigned char *base; |
ffd56f97 JB |
271 | |
272 | register int ceiling; | |
273 | register unsigned char *ceiling_addr; | |
ca1d1d23 JB |
274 | |
275 | if (shortage != 0) | |
276 | *shortage = 0; | |
277 | ||
278 | immediate_quit = 1; | |
279 | ||
ffd56f97 JB |
280 | if (count > 0) |
281 | while (start != limit + 1) | |
ca1d1d23 | 282 | { |
ffd56f97 JB |
283 | ceiling = BUFFER_CEILING_OF (start); |
284 | ceiling = min (limit, ceiling); | |
285 | ceiling_addr = &FETCH_CHAR (ceiling) + 1; | |
286 | base = (cursor = &FETCH_CHAR (start)); | |
ca1d1d23 JB |
287 | while (1) |
288 | { | |
ffd56f97 | 289 | while (*cursor != target && ++cursor != ceiling_addr) |
ca1d1d23 | 290 | ; |
ffd56f97 | 291 | if (cursor != ceiling_addr) |
ca1d1d23 | 292 | { |
ffd56f97 | 293 | if (--count == 0) |
ca1d1d23 JB |
294 | { |
295 | immediate_quit = 0; | |
ffd56f97 | 296 | return (start + cursor - base + 1); |
ca1d1d23 JB |
297 | } |
298 | else | |
ffd56f97 | 299 | if (++cursor == ceiling_addr) |
ca1d1d23 JB |
300 | break; |
301 | } | |
302 | else | |
303 | break; | |
304 | } | |
ffd56f97 | 305 | start += cursor - base; |
ca1d1d23 JB |
306 | } |
307 | else | |
308 | { | |
ffd56f97 JB |
309 | start--; /* first character we scan */ |
310 | while (start > limit - 1) | |
311 | { /* we WILL scan under start */ | |
312 | ceiling = BUFFER_FLOOR_OF (start); | |
313 | ceiling = max (limit, ceiling); | |
314 | ceiling_addr = &FETCH_CHAR (ceiling) - 1; | |
315 | base = (cursor = &FETCH_CHAR (start)); | |
ca1d1d23 JB |
316 | cursor++; |
317 | while (1) | |
318 | { | |
ffd56f97 | 319 | while (--cursor != ceiling_addr && *cursor != target) |
ca1d1d23 | 320 | ; |
ffd56f97 | 321 | if (cursor != ceiling_addr) |
ca1d1d23 | 322 | { |
ffd56f97 | 323 | if (++count == 0) |
ca1d1d23 JB |
324 | { |
325 | immediate_quit = 0; | |
ffd56f97 | 326 | return (start + cursor - base + 1); |
ca1d1d23 JB |
327 | } |
328 | } | |
329 | else | |
330 | break; | |
331 | } | |
ffd56f97 | 332 | start += cursor - base; |
ca1d1d23 JB |
333 | } |
334 | } | |
335 | immediate_quit = 0; | |
336 | if (shortage != 0) | |
ffd56f97 JB |
337 | *shortage = count * direction; |
338 | return (start + ((direction == 1 ? 0 : 1))); | |
ca1d1d23 JB |
339 | } |
340 | ||
341 | int | |
342 | find_next_newline (from, cnt) | |
343 | register int from, cnt; | |
344 | { | |
345 | return (scan_buffer ('\n', from, cnt, (int *) 0)); | |
346 | } | |
347 | \f | |
c1dc99a1 JB |
348 | Lisp_Object skip_chars (); |
349 | ||
ca1d1d23 JB |
350 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, |
351 | "Move point forward, stopping before a char not in CHARS, or at position LIM.\n\ | |
352 | CHARS is like the inside of a `[...]' in a regular expression\n\ | |
353 | except that `]' is never special and `\\' quotes `^', `-' or `\\'.\n\ | |
354 | Thus, with arg \"a-zA-Z\", this skips letters stopping before first nonletter.\n\ | |
c1dc99a1 JB |
355 | With arg \"^a-zA-Z\", skips nonletters stopping before first letter.\n\ |
356 | Returns the distance traveled, either zero or positive.") | |
ca1d1d23 JB |
357 | (string, lim) |
358 | Lisp_Object string, lim; | |
359 | { | |
c1dc99a1 | 360 | return skip_chars (1, string, lim); |
ca1d1d23 JB |
361 | } |
362 | ||
363 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, | |
364 | "Move point backward, stopping after a char not in CHARS, or at position LIM.\n\ | |
c1dc99a1 JB |
365 | See `skip-chars-forward' for details.\n\ |
366 | Returns the distance traveled, either zero or negative.") | |
ca1d1d23 JB |
367 | (string, lim) |
368 | Lisp_Object string, lim; | |
369 | { | |
c1dc99a1 | 370 | return skip_chars (0, string, lim); |
ca1d1d23 JB |
371 | } |
372 | ||
c1dc99a1 | 373 | Lisp_Object |
ca1d1d23 JB |
374 | skip_chars (forwardp, string, lim) |
375 | int forwardp; | |
376 | Lisp_Object string, lim; | |
377 | { | |
378 | register unsigned char *p, *pend; | |
379 | register unsigned char c; | |
380 | unsigned char fastmap[0400]; | |
381 | int negate = 0; | |
382 | register int i; | |
383 | ||
384 | CHECK_STRING (string, 0); | |
385 | ||
386 | if (NILP (lim)) | |
387 | XSET (lim, Lisp_Int, forwardp ? ZV : BEGV); | |
388 | else | |
389 | CHECK_NUMBER_COERCE_MARKER (lim, 1); | |
390 | ||
391 | #if 0 /* This breaks some things... jla. */ | |
392 | /* In any case, don't allow scan outside bounds of buffer. */ | |
393 | if (XFASTINT (lim) > ZV) | |
394 | XFASTINT (lim) = ZV; | |
395 | if (XFASTINT (lim) < BEGV) | |
396 | XFASTINT (lim) = BEGV; | |
397 | #endif | |
398 | ||
399 | p = XSTRING (string)->data; | |
400 | pend = p + XSTRING (string)->size; | |
401 | bzero (fastmap, sizeof fastmap); | |
402 | ||
403 | if (p != pend && *p == '^') | |
404 | { | |
405 | negate = 1; p++; | |
406 | } | |
407 | ||
408 | /* Find the characters specified and set their elements of fastmap. */ | |
409 | ||
410 | while (p != pend) | |
411 | { | |
412 | c = *p++; | |
413 | if (c == '\\') | |
414 | { | |
415 | if (p == pend) break; | |
416 | c = *p++; | |
417 | } | |
418 | if (p != pend && *p == '-') | |
419 | { | |
420 | p++; | |
421 | if (p == pend) break; | |
422 | while (c <= *p) | |
423 | { | |
424 | fastmap[c] = 1; | |
425 | c++; | |
426 | } | |
427 | p++; | |
428 | } | |
429 | else | |
430 | fastmap[c] = 1; | |
431 | } | |
432 | ||
433 | /* If ^ was the first character, complement the fastmap. */ | |
434 | ||
435 | if (negate) | |
436 | for (i = 0; i < sizeof fastmap; i++) | |
437 | fastmap[i] ^= 1; | |
438 | ||
c1dc99a1 JB |
439 | { |
440 | int start_point = point; | |
441 | ||
442 | immediate_quit = 1; | |
443 | if (forwardp) | |
444 | { | |
445 | while (point < XINT (lim) && fastmap[FETCH_CHAR (point)]) | |
446 | SET_PT (point + 1); | |
447 | } | |
448 | else | |
449 | { | |
450 | while (point > XINT (lim) && fastmap[FETCH_CHAR (point - 1)]) | |
451 | SET_PT (point - 1); | |
452 | } | |
453 | immediate_quit = 0; | |
454 | ||
455 | return make_number (point - start_point); | |
456 | } | |
ca1d1d23 JB |
457 | } |
458 | \f | |
459 | /* Subroutines of Lisp buffer search functions. */ | |
460 | ||
461 | static Lisp_Object | |
462 | search_command (string, bound, noerror, count, direction, RE) | |
463 | Lisp_Object string, bound, noerror, count; | |
464 | int direction; | |
465 | int RE; | |
466 | { | |
467 | register int np; | |
468 | int lim; | |
469 | int n = direction; | |
470 | ||
471 | if (!NILP (count)) | |
472 | { | |
473 | CHECK_NUMBER (count, 3); | |
474 | n *= XINT (count); | |
475 | } | |
476 | ||
477 | CHECK_STRING (string, 0); | |
478 | if (NILP (bound)) | |
479 | lim = n > 0 ? ZV : BEGV; | |
480 | else | |
481 | { | |
482 | CHECK_NUMBER_COERCE_MARKER (bound, 1); | |
483 | lim = XINT (bound); | |
484 | if (n > 0 ? lim < point : lim > point) | |
485 | error ("Invalid search bound (wrong side of point)"); | |
486 | if (lim > ZV) | |
487 | lim = ZV; | |
488 | if (lim < BEGV) | |
489 | lim = BEGV; | |
490 | } | |
491 | ||
492 | np = search_buffer (string, point, lim, n, RE, | |
493 | (!NILP (current_buffer->case_fold_search) | |
494 | ? XSTRING (current_buffer->case_canon_table)->data : 0), | |
495 | (!NILP (current_buffer->case_fold_search) | |
496 | ? XSTRING (current_buffer->case_eqv_table)->data : 0)); | |
497 | if (np <= 0) | |
498 | { | |
499 | if (NILP (noerror)) | |
500 | return signal_failure (string); | |
501 | if (!EQ (noerror, Qt)) | |
502 | { | |
503 | if (lim < BEGV || lim > ZV) | |
504 | abort (); | |
505 | SET_PT (lim); | |
506 | } | |
507 | return Qnil; | |
508 | } | |
509 | ||
510 | if (np < BEGV || np > ZV) | |
511 | abort (); | |
512 | ||
513 | SET_PT (np); | |
514 | ||
515 | return make_number (np); | |
516 | } | |
517 | \f | |
518 | /* search for the n'th occurrence of STRING in the current buffer, | |
519 | starting at position POS and stopping at position LIM, | |
520 | treating PAT as a literal string if RE is false or as | |
521 | a regular expression if RE is true. | |
522 | ||
523 | If N is positive, searching is forward and LIM must be greater than POS. | |
524 | If N is negative, searching is backward and LIM must be less than POS. | |
525 | ||
526 | Returns -x if only N-x occurrences found (x > 0), | |
527 | or else the position at the beginning of the Nth occurrence | |
528 | (if searching backward) or the end (if searching forward). */ | |
529 | ||
530 | search_buffer (string, pos, lim, n, RE, trt, inverse_trt) | |
531 | Lisp_Object string; | |
532 | int pos; | |
533 | int lim; | |
534 | int n; | |
535 | int RE; | |
536 | register unsigned char *trt; | |
537 | register unsigned char *inverse_trt; | |
538 | { | |
539 | int len = XSTRING (string)->size; | |
540 | unsigned char *base_pat = XSTRING (string)->data; | |
541 | register int *BM_tab; | |
542 | int *BM_tab_base; | |
543 | register int direction = ((n > 0) ? 1 : -1); | |
544 | register int dirlen; | |
545 | int infinity, limit, k, stride_for_teases; | |
546 | register unsigned char *pat, *cursor, *p_limit; | |
547 | register int i, j; | |
548 | unsigned char *p1, *p2; | |
549 | int s1, s2; | |
550 | ||
551 | /* Null string is found at starting position. */ | |
552 | if (!len) | |
553 | return pos; | |
554 | ||
555 | if (RE) | |
1113d9db | 556 | compile_pattern (string, &searchbuf, &search_regs, (char *) trt); |
ca1d1d23 JB |
557 | |
558 | if (RE /* Here we detect whether the */ | |
559 | /* generality of an RE search is */ | |
560 | /* really needed. */ | |
561 | /* first item is "exact match" */ | |
4746118a | 562 | && *(searchbuf.buffer) == (char) RE_EXACTN_VALUE |
ca1d1d23 JB |
563 | && searchbuf.buffer[1] + 2 == searchbuf.used) /*first is ONLY item */ |
564 | { | |
565 | RE = 0; /* can do straight (non RE) search */ | |
566 | pat = (base_pat = (unsigned char *) searchbuf.buffer + 2); | |
567 | /* trt already applied */ | |
568 | len = searchbuf.used - 2; | |
569 | } | |
570 | else if (!RE) | |
571 | { | |
572 | pat = (unsigned char *) alloca (len); | |
573 | ||
574 | for (i = len; i--;) /* Copy the pattern; apply trt */ | |
575 | *pat++ = (((int) trt) ? trt [*base_pat++] : *base_pat++); | |
576 | pat -= len; base_pat = pat; | |
577 | } | |
578 | ||
579 | if (RE) | |
580 | { | |
581 | immediate_quit = 1; /* Quit immediately if user types ^G, | |
582 | because letting this function finish | |
583 | can take too long. */ | |
584 | QUIT; /* Do a pending quit right away, | |
585 | to avoid paradoxical behavior */ | |
586 | /* Get pointers and sizes of the two strings | |
587 | that make up the visible portion of the buffer. */ | |
588 | ||
589 | p1 = BEGV_ADDR; | |
590 | s1 = GPT - BEGV; | |
591 | p2 = GAP_END_ADDR; | |
592 | s2 = ZV - GPT; | |
593 | if (s1 < 0) | |
594 | { | |
595 | p2 = p1; | |
596 | s2 = ZV - BEGV; | |
597 | s1 = 0; | |
598 | } | |
599 | if (s2 < 0) | |
600 | { | |
601 | s1 = ZV - BEGV; | |
602 | s2 = 0; | |
603 | } | |
604 | while (n < 0) | |
605 | { | |
606 | int val = re_search_2 (&searchbuf, (char *) p1, s1, (char *) p2, s2, | |
607 | pos - BEGV, lim - pos, &search_regs, | |
608 | /* Don't allow match past current point */ | |
609 | pos - BEGV); | |
610 | if (val == -2) | |
611 | matcher_overflow (); | |
612 | if (val >= 0) | |
613 | { | |
614 | j = BEGV; | |
4746118a | 615 | for (i = 0; i < search_regs.num_regs; i++) |
ca1d1d23 JB |
616 | if (search_regs.start[i] >= 0) |
617 | { | |
618 | search_regs.start[i] += j; | |
619 | search_regs.end[i] += j; | |
620 | } | |
daa37602 | 621 | XSET (last_thing_searched, Lisp_Buffer, current_buffer); |
ca1d1d23 JB |
622 | /* Set pos to the new position. */ |
623 | pos = search_regs.start[0]; | |
624 | } | |
625 | else | |
626 | { | |
627 | immediate_quit = 0; | |
628 | return (n); | |
629 | } | |
630 | n++; | |
631 | } | |
632 | while (n > 0) | |
633 | { | |
634 | int val = re_search_2 (&searchbuf, (char *) p1, s1, (char *) p2, s2, | |
635 | pos - BEGV, lim - pos, &search_regs, | |
636 | lim - BEGV); | |
637 | if (val == -2) | |
638 | matcher_overflow (); | |
639 | if (val >= 0) | |
640 | { | |
641 | j = BEGV; | |
4746118a | 642 | for (i = 0; i < search_regs.num_regs; i++) |
ca1d1d23 JB |
643 | if (search_regs.start[i] >= 0) |
644 | { | |
645 | search_regs.start[i] += j; | |
646 | search_regs.end[i] += j; | |
647 | } | |
daa37602 | 648 | XSET (last_thing_searched, Lisp_Buffer, current_buffer); |
ca1d1d23 JB |
649 | pos = search_regs.end[0]; |
650 | } | |
651 | else | |
652 | { | |
653 | immediate_quit = 0; | |
654 | return (0 - n); | |
655 | } | |
656 | n--; | |
657 | } | |
658 | immediate_quit = 0; | |
659 | return (pos); | |
660 | } | |
661 | else /* non-RE case */ | |
662 | { | |
663 | #ifdef C_ALLOCA | |
664 | int BM_tab_space[0400]; | |
665 | BM_tab = &BM_tab_space[0]; | |
666 | #else | |
667 | BM_tab = (int *) alloca (0400 * sizeof (int)); | |
668 | #endif | |
669 | /* The general approach is that we are going to maintain that we know */ | |
670 | /* the first (closest to the present position, in whatever direction */ | |
671 | /* we're searching) character that could possibly be the last */ | |
672 | /* (furthest from present position) character of a valid match. We */ | |
673 | /* advance the state of our knowledge by looking at that character */ | |
674 | /* and seeing whether it indeed matches the last character of the */ | |
675 | /* pattern. If it does, we take a closer look. If it does not, we */ | |
676 | /* move our pointer (to putative last characters) as far as is */ | |
677 | /* logically possible. This amount of movement, which I call a */ | |
678 | /* stride, will be the length of the pattern if the actual character */ | |
679 | /* appears nowhere in the pattern, otherwise it will be the distance */ | |
680 | /* from the last occurrence of that character to the end of the */ | |
681 | /* pattern. */ | |
682 | /* As a coding trick, an enormous stride is coded into the table for */ | |
683 | /* characters that match the last character. This allows use of only */ | |
684 | /* a single test, a test for having gone past the end of the */ | |
685 | /* permissible match region, to test for both possible matches (when */ | |
686 | /* the stride goes past the end immediately) and failure to */ | |
687 | /* match (where you get nudged past the end one stride at a time). */ | |
688 | ||
689 | /* Here we make a "mickey mouse" BM table. The stride of the search */ | |
690 | /* is determined only by the last character of the putative match. */ | |
691 | /* If that character does not match, we will stride the proper */ | |
692 | /* distance to propose a match that superimposes it on the last */ | |
693 | /* instance of a character that matches it (per trt), or misses */ | |
694 | /* it entirely if there is none. */ | |
695 | ||
696 | dirlen = len * direction; | |
697 | infinity = dirlen - (lim + pos + len + len) * direction; | |
698 | if (direction < 0) | |
699 | pat = (base_pat += len - 1); | |
700 | BM_tab_base = BM_tab; | |
701 | BM_tab += 0400; | |
702 | j = dirlen; /* to get it in a register */ | |
703 | /* A character that does not appear in the pattern induces a */ | |
704 | /* stride equal to the pattern length. */ | |
705 | while (BM_tab_base != BM_tab) | |
706 | { | |
707 | *--BM_tab = j; | |
708 | *--BM_tab = j; | |
709 | *--BM_tab = j; | |
710 | *--BM_tab = j; | |
711 | } | |
712 | i = 0; | |
713 | while (i != infinity) | |
714 | { | |
715 | j = pat[i]; i += direction; | |
716 | if (i == dirlen) i = infinity; | |
717 | if ((int) trt) | |
718 | { | |
719 | k = (j = trt[j]); | |
720 | if (i == infinity) | |
721 | stride_for_teases = BM_tab[j]; | |
722 | BM_tab[j] = dirlen - i; | |
723 | /* A translation table is accompanied by its inverse -- see */ | |
724 | /* comment following downcase_table for details */ | |
725 | while ((j = inverse_trt[j]) != k) | |
726 | BM_tab[j] = dirlen - i; | |
727 | } | |
728 | else | |
729 | { | |
730 | if (i == infinity) | |
731 | stride_for_teases = BM_tab[j]; | |
732 | BM_tab[j] = dirlen - i; | |
733 | } | |
734 | /* stride_for_teases tells how much to stride if we get a */ | |
735 | /* match on the far character but are subsequently */ | |
736 | /* disappointed, by recording what the stride would have been */ | |
737 | /* for that character if the last character had been */ | |
738 | /* different. */ | |
739 | } | |
740 | infinity = dirlen - infinity; | |
741 | pos += dirlen - ((direction > 0) ? direction : 0); | |
742 | /* loop invariant - pos points at where last char (first char if reverse) | |
743 | of pattern would align in a possible match. */ | |
744 | while (n != 0) | |
745 | { | |
746 | if ((lim - pos - (direction > 0)) * direction < 0) | |
747 | return (n * (0 - direction)); | |
748 | /* First we do the part we can by pointers (maybe nothing) */ | |
749 | QUIT; | |
750 | pat = base_pat; | |
751 | limit = pos - dirlen + direction; | |
752 | limit = ((direction > 0) | |
753 | ? BUFFER_CEILING_OF (limit) | |
754 | : BUFFER_FLOOR_OF (limit)); | |
755 | /* LIMIT is now the last (not beyond-last!) value | |
756 | POS can take on without hitting edge of buffer or the gap. */ | |
757 | limit = ((direction > 0) | |
758 | ? min (lim - 1, min (limit, pos + 20000)) | |
759 | : max (lim, max (limit, pos - 20000))); | |
760 | if ((limit - pos) * direction > 20) | |
761 | { | |
762 | p_limit = &FETCH_CHAR (limit); | |
763 | p2 = (cursor = &FETCH_CHAR (pos)); | |
764 | /* In this loop, pos + cursor - p2 is the surrogate for pos */ | |
765 | while (1) /* use one cursor setting as long as i can */ | |
766 | { | |
767 | if (direction > 0) /* worth duplicating */ | |
768 | { | |
769 | /* Use signed comparison if appropriate | |
770 | to make cursor+infinity sure to be > p_limit. | |
771 | Assuming that the buffer lies in a range of addresses | |
772 | that are all "positive" (as ints) or all "negative", | |
773 | either kind of comparison will work as long | |
774 | as we don't step by infinity. So pick the kind | |
775 | that works when we do step by infinity. */ | |
776 | if ((int) (p_limit + infinity) > (int) p_limit) | |
777 | while ((int) cursor <= (int) p_limit) | |
778 | cursor += BM_tab[*cursor]; | |
779 | else | |
780 | while ((unsigned int) cursor <= (unsigned int) p_limit) | |
781 | cursor += BM_tab[*cursor]; | |
782 | } | |
783 | else | |
784 | { | |
785 | if ((int) (p_limit + infinity) < (int) p_limit) | |
786 | while ((int) cursor >= (int) p_limit) | |
787 | cursor += BM_tab[*cursor]; | |
788 | else | |
789 | while ((unsigned int) cursor >= (unsigned int) p_limit) | |
790 | cursor += BM_tab[*cursor]; | |
791 | } | |
792 | /* If you are here, cursor is beyond the end of the searched region. */ | |
793 | /* This can happen if you match on the far character of the pattern, */ | |
794 | /* because the "stride" of that character is infinity, a number able */ | |
795 | /* to throw you well beyond the end of the search. It can also */ | |
796 | /* happen if you fail to match within the permitted region and would */ | |
797 | /* otherwise try a character beyond that region */ | |
798 | if ((cursor - p_limit) * direction <= len) | |
799 | break; /* a small overrun is genuine */ | |
800 | cursor -= infinity; /* large overrun = hit */ | |
801 | i = dirlen - direction; | |
802 | if ((int) trt) | |
803 | { | |
804 | while ((i -= direction) + direction != 0) | |
805 | if (pat[i] != trt[*(cursor -= direction)]) | |
806 | break; | |
807 | } | |
808 | else | |
809 | { | |
810 | while ((i -= direction) + direction != 0) | |
811 | if (pat[i] != *(cursor -= direction)) | |
812 | break; | |
813 | } | |
814 | cursor += dirlen - i - direction; /* fix cursor */ | |
815 | if (i + direction == 0) | |
816 | { | |
817 | cursor -= direction; | |
1113d9db JB |
818 | |
819 | /* Make sure we have registers in which to store | |
820 | the match position. */ | |
821 | if (search_regs.num_regs == 0) | |
822 | { | |
823 | regoff_t *starts, *ends; | |
824 | ||
825 | starts = | |
826 | (regoff_t *) xmalloc (2 * sizeof (regoff_t)); | |
827 | ends = | |
828 | (regoff_t *) xmalloc (2 * sizeof (regoff_t)); | |
829 | re_set_registers (&searchbuf, | |
830 | &search_regs, | |
831 | 2, starts, ends); | |
832 | } | |
833 | ||
ca1d1d23 JB |
834 | search_regs.start[0] |
835 | = pos + cursor - p2 + ((direction > 0) | |
836 | ? 1 - len : 0); | |
837 | search_regs.end[0] = len + search_regs.start[0]; | |
daa37602 | 838 | XSET (last_thing_searched, Lisp_Buffer, current_buffer); |
ca1d1d23 JB |
839 | if ((n -= direction) != 0) |
840 | cursor += dirlen; /* to resume search */ | |
841 | else | |
842 | return ((direction > 0) | |
843 | ? search_regs.end[0] : search_regs.start[0]); | |
844 | } | |
845 | else | |
846 | cursor += stride_for_teases; /* <sigh> we lose - */ | |
847 | } | |
848 | pos += cursor - p2; | |
849 | } | |
850 | else | |
851 | /* Now we'll pick up a clump that has to be done the hard */ | |
852 | /* way because it covers a discontinuity */ | |
853 | { | |
854 | limit = ((direction > 0) | |
855 | ? BUFFER_CEILING_OF (pos - dirlen + 1) | |
856 | : BUFFER_FLOOR_OF (pos - dirlen - 1)); | |
857 | limit = ((direction > 0) | |
858 | ? min (limit + len, lim - 1) | |
859 | : max (limit - len, lim)); | |
860 | /* LIMIT is now the last value POS can have | |
861 | and still be valid for a possible match. */ | |
862 | while (1) | |
863 | { | |
864 | /* This loop can be coded for space rather than */ | |
865 | /* speed because it will usually run only once. */ | |
866 | /* (the reach is at most len + 21, and typically */ | |
867 | /* does not exceed len) */ | |
868 | while ((limit - pos) * direction >= 0) | |
869 | pos += BM_tab[FETCH_CHAR(pos)]; | |
870 | /* now run the same tests to distinguish going off the */ | |
871 | /* end, a match or a phoney match. */ | |
872 | if ((pos - limit) * direction <= len) | |
873 | break; /* ran off the end */ | |
874 | /* Found what might be a match. | |
875 | Set POS back to last (first if reverse) char pos. */ | |
876 | pos -= infinity; | |
877 | i = dirlen - direction; | |
878 | while ((i -= direction) + direction != 0) | |
879 | { | |
880 | pos -= direction; | |
881 | if (pat[i] != (((int) trt) | |
882 | ? trt[FETCH_CHAR(pos)] | |
883 | : FETCH_CHAR (pos))) | |
884 | break; | |
885 | } | |
886 | /* Above loop has moved POS part or all the way | |
887 | back to the first char pos (last char pos if reverse). | |
888 | Set it once again at the last (first if reverse) char. */ | |
889 | pos += dirlen - i- direction; | |
890 | if (i + direction == 0) | |
891 | { | |
892 | pos -= direction; | |
1113d9db JB |
893 | |
894 | /* Make sure we have registers in which to store | |
895 | the match position. */ | |
896 | if (search_regs.num_regs == 0) | |
897 | { | |
898 | regoff_t *starts, *ends; | |
899 | ||
900 | starts = | |
901 | (regoff_t *) xmalloc (2 * sizeof (regoff_t)); | |
902 | ends = | |
903 | (regoff_t *) xmalloc (2 * sizeof (regoff_t)); | |
904 | re_set_registers (&searchbuf, | |
905 | &search_regs, | |
906 | 2, starts, ends); | |
907 | } | |
908 | ||
ca1d1d23 JB |
909 | search_regs.start[0] |
910 | = pos + ((direction > 0) ? 1 - len : 0); | |
911 | search_regs.end[0] = len + search_regs.start[0]; | |
daa37602 | 912 | XSET (last_thing_searched, Lisp_Buffer, current_buffer); |
ca1d1d23 JB |
913 | if ((n -= direction) != 0) |
914 | pos += dirlen; /* to resume search */ | |
915 | else | |
916 | return ((direction > 0) | |
917 | ? search_regs.end[0] : search_regs.start[0]); | |
918 | } | |
919 | else | |
920 | pos += stride_for_teases; | |
921 | } | |
922 | } | |
923 | /* We have done one clump. Can we continue? */ | |
924 | if ((lim - pos) * direction < 0) | |
925 | return ((0 - n) * direction); | |
926 | } | |
927 | return pos; | |
928 | } | |
929 | } | |
930 | \f | |
931 | /* Given a string of words separated by word delimiters, | |
932 | compute a regexp that matches those exact words | |
933 | separated by arbitrary punctuation. */ | |
934 | ||
935 | static Lisp_Object | |
936 | wordify (string) | |
937 | Lisp_Object string; | |
938 | { | |
939 | register unsigned char *p, *o; | |
940 | register int i, len, punct_count = 0, word_count = 0; | |
941 | Lisp_Object val; | |
942 | ||
943 | CHECK_STRING (string, 0); | |
944 | p = XSTRING (string)->data; | |
945 | len = XSTRING (string)->size; | |
946 | ||
947 | for (i = 0; i < len; i++) | |
948 | if (SYNTAX (p[i]) != Sword) | |
949 | { | |
950 | punct_count++; | |
951 | if (i > 0 && SYNTAX (p[i-1]) == Sword) word_count++; | |
952 | } | |
953 | if (SYNTAX (p[len-1]) == Sword) word_count++; | |
954 | if (!word_count) return build_string (""); | |
955 | ||
956 | val = make_string (p, len - punct_count + 5 * (word_count - 1) + 4); | |
957 | ||
958 | o = XSTRING (val)->data; | |
959 | *o++ = '\\'; | |
960 | *o++ = 'b'; | |
961 | ||
962 | for (i = 0; i < len; i++) | |
963 | if (SYNTAX (p[i]) == Sword) | |
964 | *o++ = p[i]; | |
965 | else if (i > 0 && SYNTAX (p[i-1]) == Sword && --word_count) | |
966 | { | |
967 | *o++ = '\\'; | |
968 | *o++ = 'W'; | |
969 | *o++ = '\\'; | |
970 | *o++ = 'W'; | |
971 | *o++ = '*'; | |
972 | } | |
973 | ||
974 | *o++ = '\\'; | |
975 | *o++ = 'b'; | |
976 | ||
977 | return val; | |
978 | } | |
979 | \f | |
980 | DEFUN ("search-backward", Fsearch_backward, Ssearch_backward, 1, 4, | |
981 | "sSearch backward: ", | |
982 | "Search backward from point for STRING.\n\ | |
983 | Set point to the beginning of the occurrence found, and return point.\n\ | |
984 | An optional second argument bounds the search; it is a buffer position.\n\ | |
985 | The match found must not extend before that position.\n\ | |
986 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
987 | If not nil and not t, position at limit of search and return nil.\n\ | |
988 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
989 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
990 | (string, bound, noerror, count) | |
991 | Lisp_Object string, bound, noerror, count; | |
992 | { | |
993 | return search_command (string, bound, noerror, count, -1, 0); | |
994 | } | |
995 | ||
996 | DEFUN ("search-forward", Fsearch_forward, Ssearch_forward, 1, 4, "sSearch: ", | |
997 | "Search forward from point for STRING.\n\ | |
998 | Set point to the end of the occurrence found, and return point.\n\ | |
999 | An optional second argument bounds the search; it is a buffer position.\n\ | |
1000 | The match found must not extend after that position. nil is equivalent\n\ | |
1001 | to (point-max).\n\ | |
1002 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
1003 | If not nil and not t, move to limit of search and return nil.\n\ | |
1004 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
1005 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
1006 | (string, bound, noerror, count) | |
1007 | Lisp_Object string, bound, noerror, count; | |
1008 | { | |
1009 | return search_command (string, bound, noerror, count, 1, 0); | |
1010 | } | |
1011 | ||
1012 | DEFUN ("word-search-backward", Fword_search_backward, Sword_search_backward, 1, 4, | |
1013 | "sWord search backward: ", | |
1014 | "Search backward from point for STRING, ignoring differences in punctuation.\n\ | |
1015 | Set point to the beginning of the occurrence found, and return point.\n\ | |
1016 | An optional second argument bounds the search; it is a buffer position.\n\ | |
1017 | The match found must not extend before that position.\n\ | |
1018 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
1019 | If not nil and not t, move to limit of search and return nil.\n\ | |
1020 | Optional fourth argument is repeat count--search for successive occurrences.") | |
1021 | (string, bound, noerror, count) | |
1022 | Lisp_Object string, bound, noerror, count; | |
1023 | { | |
1024 | return search_command (wordify (string), bound, noerror, count, -1, 1); | |
1025 | } | |
1026 | ||
1027 | DEFUN ("word-search-forward", Fword_search_forward, Sword_search_forward, 1, 4, | |
1028 | "sWord search: ", | |
1029 | "Search forward from point for STRING, ignoring differences in punctuation.\n\ | |
1030 | Set point to the end of the occurrence found, and return point.\n\ | |
1031 | An optional second argument bounds the search; it is a buffer position.\n\ | |
1032 | The match found must not extend after that position.\n\ | |
1033 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
1034 | If not nil and not t, move to limit of search and return nil.\n\ | |
1035 | Optional fourth argument is repeat count--search for successive occurrences.") | |
1036 | (string, bound, noerror, count) | |
1037 | Lisp_Object string, bound, noerror, count; | |
1038 | { | |
1039 | return search_command (wordify (string), bound, noerror, count, 1, 1); | |
1040 | } | |
1041 | ||
1042 | DEFUN ("re-search-backward", Fre_search_backward, Sre_search_backward, 1, 4, | |
1043 | "sRE search backward: ", | |
1044 | "Search backward from point for match for regular expression REGEXP.\n\ | |
1045 | Set point to the beginning of the match, and return point.\n\ | |
1046 | The match found is the one starting last in the buffer\n\ | |
1047 | and yet ending before the place the origin of the search.\n\ | |
1048 | An optional second argument bounds the search; it is a buffer position.\n\ | |
1049 | The match found must start at or after that position.\n\ | |
1050 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
1051 | If not nil and not t, move to limit of search and return nil.\n\ | |
1052 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
1053 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
1054 | (string, bound, noerror, count) | |
1055 | Lisp_Object string, bound, noerror, count; | |
1056 | { | |
1057 | return search_command (string, bound, noerror, count, -1, 1); | |
1058 | } | |
1059 | ||
1060 | DEFUN ("re-search-forward", Fre_search_forward, Sre_search_forward, 1, 4, | |
1061 | "sRE search: ", | |
1062 | "Search forward from point for regular expression REGEXP.\n\ | |
1063 | Set point to the end of the occurrence found, and return point.\n\ | |
1064 | An optional second argument bounds the search; it is a buffer position.\n\ | |
1065 | The match found must not extend after that position.\n\ | |
1066 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
1067 | If not nil and not t, move to limit of search and return nil.\n\ | |
1068 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
1069 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
1070 | (string, bound, noerror, count) | |
1071 | Lisp_Object string, bound, noerror, count; | |
1072 | { | |
1073 | return search_command (string, bound, noerror, count, 1, 1); | |
1074 | } | |
1075 | \f | |
1076 | DEFUN ("replace-match", Freplace_match, Sreplace_match, 1, 3, 0, | |
1077 | "Replace text matched by last search with NEWTEXT.\n\ | |
1078 | If second arg FIXEDCASE is non-nil, do not alter case of replacement text.\n\ | |
1079 | Otherwise convert to all caps or cap initials, like replaced text.\n\ | |
1080 | If third arg LITERAL is non-nil, insert NEWTEXT literally.\n\ | |
1081 | Otherwise treat `\\' as special:\n\ | |
1082 | `\\&' in NEWTEXT means substitute original matched text.\n\ | |
1083 | `\\N' means substitute what matched the Nth `\\(...\\)'.\n\ | |
1084 | If Nth parens didn't match, substitute nothing.\n\ | |
1085 | `\\\\' means insert one `\\'.\n\ | |
1113d9db | 1086 | FIXEDCASE and LITERAL are optional arguments.\n\ |
ca1d1d23 JB |
1087 | Leaves point at end of replacement text.") |
1088 | (string, fixedcase, literal) | |
1089 | Lisp_Object string, fixedcase, literal; | |
1090 | { | |
1091 | enum { nochange, all_caps, cap_initial } case_action; | |
1092 | register int pos, last; | |
1093 | int some_multiletter_word; | |
1094 | int some_letter = 0; | |
1095 | register int c, prevc; | |
1096 | int inslen; | |
1097 | ||
1098 | CHECK_STRING (string, 0); | |
1099 | ||
1100 | case_action = nochange; /* We tried an initialization */ | |
1101 | /* but some C compilers blew it */ | |
4746118a JB |
1102 | |
1103 | if (search_regs.num_regs <= 0) | |
1104 | error ("replace-match called before any match found"); | |
1105 | ||
ca1d1d23 JB |
1106 | if (search_regs.start[0] < BEGV |
1107 | || search_regs.start[0] > search_regs.end[0] | |
1108 | || search_regs.end[0] > ZV) | |
1109 | args_out_of_range(make_number (search_regs.start[0]), | |
1110 | make_number (search_regs.end[0])); | |
1111 | ||
1112 | if (NILP (fixedcase)) | |
1113 | { | |
1114 | /* Decide how to casify by examining the matched text. */ | |
1115 | ||
1116 | last = search_regs.end[0]; | |
1117 | prevc = '\n'; | |
1118 | case_action = all_caps; | |
1119 | ||
1120 | /* some_multiletter_word is set nonzero if any original word | |
1121 | is more than one letter long. */ | |
1122 | some_multiletter_word = 0; | |
1123 | ||
1124 | for (pos = search_regs.start[0]; pos < last; pos++) | |
1125 | { | |
1126 | c = FETCH_CHAR (pos); | |
1127 | if (LOWERCASEP (c)) | |
1128 | { | |
1129 | /* Cannot be all caps if any original char is lower case */ | |
1130 | ||
1131 | case_action = cap_initial; | |
1132 | if (SYNTAX (prevc) != Sword) | |
1133 | { | |
1134 | /* Cannot even be cap initials | |
1135 | if some original initial is lower case */ | |
1136 | case_action = nochange; | |
1137 | break; | |
1138 | } | |
1139 | else | |
1140 | some_multiletter_word = 1; | |
1141 | } | |
1142 | else if (!NOCASEP (c)) | |
1143 | { | |
1144 | some_letter = 1; | |
1145 | if (!some_multiletter_word && SYNTAX (prevc) == Sword) | |
1146 | some_multiletter_word = 1; | |
1147 | } | |
1148 | ||
1149 | prevc = c; | |
1150 | } | |
1151 | ||
1152 | /* Do not make new text all caps | |
1153 | if the original text contained only single letter words. */ | |
1154 | if (case_action == all_caps && !some_multiletter_word) | |
1155 | case_action = cap_initial; | |
1156 | ||
1157 | if (!some_letter) case_action = nochange; | |
1158 | } | |
1159 | ||
1160 | SET_PT (search_regs.end[0]); | |
1161 | if (!NILP (literal)) | |
1162 | Finsert (1, &string); | |
1163 | else | |
1164 | { | |
1165 | struct gcpro gcpro1; | |
1166 | GCPRO1 (string); | |
1167 | ||
1168 | for (pos = 0; pos < XSTRING (string)->size; pos++) | |
1169 | { | |
1170 | c = XSTRING (string)->data[pos]; | |
1171 | if (c == '\\') | |
1172 | { | |
1173 | c = XSTRING (string)->data[++pos]; | |
1174 | if (c == '&') | |
1175 | Finsert_buffer_substring (Fcurrent_buffer (), | |
1176 | make_number (search_regs.start[0]), | |
1177 | make_number (search_regs.end[0])); | |
4746118a | 1178 | else if (c >= '1' && c <= search_regs.num_regs + '0') |
ca1d1d23 JB |
1179 | { |
1180 | if (search_regs.start[c - '0'] >= 1) | |
1181 | Finsert_buffer_substring (Fcurrent_buffer (), | |
1182 | make_number (search_regs.start[c - '0']), | |
1183 | make_number (search_regs.end[c - '0'])); | |
1184 | } | |
1185 | else | |
1186 | insert_char (c); | |
1187 | } | |
1188 | else | |
1189 | insert_char (c); | |
1190 | } | |
1191 | UNGCPRO; | |
1192 | } | |
1193 | ||
1194 | inslen = point - (search_regs.end[0]); | |
1195 | del_range (search_regs.start[0], search_regs.end[0]); | |
1196 | ||
1197 | if (case_action == all_caps) | |
1198 | Fupcase_region (make_number (point - inslen), make_number (point)); | |
1199 | else if (case_action == cap_initial) | |
1200 | upcase_initials_region (make_number (point - inslen), make_number (point)); | |
1201 | return Qnil; | |
1202 | } | |
1203 | \f | |
1204 | static Lisp_Object | |
1205 | match_limit (num, beginningp) | |
1206 | Lisp_Object num; | |
1207 | int beginningp; | |
1208 | { | |
1209 | register int n; | |
1210 | ||
1211 | CHECK_NUMBER (num, 0); | |
1212 | n = XINT (num); | |
4746118a JB |
1213 | if (n < 0 || n >= search_regs.num_regs) |
1214 | args_out_of_range (num, make_number (search_regs.num_regs)); | |
1215 | if (search_regs.num_regs <= 0 | |
1216 | || search_regs.start[n] < 0) | |
ca1d1d23 JB |
1217 | return Qnil; |
1218 | return (make_number ((beginningp) ? search_regs.start[n] | |
1219 | : search_regs.end[n])); | |
1220 | } | |
1221 | ||
1222 | DEFUN ("match-beginning", Fmatch_beginning, Smatch_beginning, 1, 1, 0, | |
1223 | "Return position of start of text matched by last search.\n\ | |
1224 | ARG, a number, specifies which parenthesized expression in the last regexp.\n\ | |
1225 | Value is nil if ARGth pair didn't match, or there were less than ARG pairs.\n\ | |
1226 | Zero means the entire text matched by the whole regexp or whole string.") | |
1227 | (num) | |
1228 | Lisp_Object num; | |
1229 | { | |
1230 | return match_limit (num, 1); | |
1231 | } | |
1232 | ||
1233 | DEFUN ("match-end", Fmatch_end, Smatch_end, 1, 1, 0, | |
1234 | "Return position of end of text matched by last search.\n\ | |
1235 | ARG, a number, specifies which parenthesized expression in the last regexp.\n\ | |
1236 | Value is nil if ARGth pair didn't match, or there were less than ARG pairs.\n\ | |
1237 | Zero means the entire text matched by the whole regexp or whole string.") | |
1238 | (num) | |
1239 | Lisp_Object num; | |
1240 | { | |
1241 | return match_limit (num, 0); | |
1242 | } | |
1243 | ||
1244 | DEFUN ("match-data", Fmatch_data, Smatch_data, 0, 0, 0, | |
1245 | "Return a list containing all info on what the last search matched.\n\ | |
1246 | Element 2N is `(match-beginning N)'; element 2N + 1 is `(match-end N)'.\n\ | |
1247 | All the elements are markers or nil (nil if the Nth pair didn't match)\n\ | |
1248 | if the last match was on a buffer; integers or nil if a string was matched.\n\ | |
1249 | Use `store-match-data' to reinstate the data in this list.") | |
1250 | () | |
1251 | { | |
4746118a | 1252 | Lisp_Object *data; |
ca1d1d23 JB |
1253 | int i, len; |
1254 | ||
daa37602 JB |
1255 | if (NILP (last_thing_searched)) |
1256 | error ("match-data called before any match found"); | |
1257 | ||
4746118a JB |
1258 | data = (Lisp_Object *) alloca ((2 * search_regs.num_regs) |
1259 | * sizeof (Lisp_Object)); | |
1260 | ||
ca1d1d23 | 1261 | len = -1; |
4746118a | 1262 | for (i = 0; i < search_regs.num_regs; i++) |
ca1d1d23 JB |
1263 | { |
1264 | int start = search_regs.start[i]; | |
1265 | if (start >= 0) | |
1266 | { | |
daa37602 | 1267 | if (EQ (last_thing_searched, Qt)) |
ca1d1d23 JB |
1268 | { |
1269 | XFASTINT (data[2 * i]) = start; | |
1270 | XFASTINT (data[2 * i + 1]) = search_regs.end[i]; | |
1271 | } | |
daa37602 | 1272 | else if (XTYPE (last_thing_searched) == Lisp_Buffer) |
ca1d1d23 JB |
1273 | { |
1274 | data[2 * i] = Fmake_marker (); | |
daa37602 JB |
1275 | Fset_marker (data[2 * i], |
1276 | make_number (start), | |
1277 | last_thing_searched); | |
ca1d1d23 JB |
1278 | data[2 * i + 1] = Fmake_marker (); |
1279 | Fset_marker (data[2 * i + 1], | |
daa37602 JB |
1280 | make_number (search_regs.end[i]), |
1281 | last_thing_searched); | |
ca1d1d23 | 1282 | } |
daa37602 JB |
1283 | else |
1284 | /* last_thing_searched must always be Qt, a buffer, or Qnil. */ | |
1285 | abort (); | |
1286 | ||
ca1d1d23 JB |
1287 | len = i; |
1288 | } | |
1289 | else | |
1290 | data[2 * i] = data [2 * i + 1] = Qnil; | |
1291 | } | |
1292 | return Flist (2 * len + 2, data); | |
1293 | } | |
1294 | ||
1295 | ||
1296 | DEFUN ("store-match-data", Fstore_match_data, Sstore_match_data, 1, 1, 0, | |
1297 | "Set internal data on last search match from elements of LIST.\n\ | |
1298 | LIST should have been created by calling `match-data' previously.") | |
1299 | (list) | |
1300 | register Lisp_Object list; | |
1301 | { | |
1302 | register int i; | |
1303 | register Lisp_Object marker; | |
1304 | ||
1305 | if (!CONSP (list) && !NILP (list)) | |
1306 | list = wrong_type_argument (Qconsp, list, 0); | |
1307 | ||
daa37602 JB |
1308 | /* Unless we find a marker with a buffer in LIST, assume that this |
1309 | match data came from a string. */ | |
1310 | last_thing_searched = Qt; | |
1311 | ||
4746118a JB |
1312 | /* Allocate registers if they don't already exist. */ |
1313 | { | |
d084e942 | 1314 | int length = XFASTINT (Flength (list)) / 2; |
4746118a JB |
1315 | |
1316 | if (length > search_regs.num_regs) | |
1317 | { | |
1113d9db JB |
1318 | if (search_regs.num_regs == 0) |
1319 | { | |
1320 | search_regs.start | |
1321 | = (regoff_t *) xmalloc (length * sizeof (regoff_t)); | |
1322 | search_regs.end | |
1323 | = (regoff_t *) xmalloc (length * sizeof (regoff_t)); | |
1324 | } | |
4746118a | 1325 | else |
1113d9db JB |
1326 | { |
1327 | search_regs.start | |
1328 | = (regoff_t *) xrealloc (search_regs.start, | |
1329 | length * sizeof (regoff_t)); | |
1330 | search_regs.end | |
1331 | = (regoff_t *) xrealloc (search_regs.end, | |
1332 | length * sizeof (regoff_t)); | |
1333 | } | |
4746118a | 1334 | |
1113d9db JB |
1335 | re_set_registers (&searchbuf, &search_regs, length, |
1336 | search_regs.start, search_regs.end); | |
4746118a JB |
1337 | } |
1338 | } | |
1339 | ||
1340 | for (i = 0; i < search_regs.num_regs; i++) | |
ca1d1d23 JB |
1341 | { |
1342 | marker = Fcar (list); | |
1343 | if (NILP (marker)) | |
1344 | { | |
1345 | search_regs.start[i] = -1; | |
1346 | list = Fcdr (list); | |
1347 | } | |
1348 | else | |
1349 | { | |
daa37602 JB |
1350 | if (XTYPE (marker) == Lisp_Marker) |
1351 | { | |
1352 | if (XMARKER (marker)->buffer == 0) | |
1353 | XFASTINT (marker) = 0; | |
1354 | else | |
1355 | XSET (last_thing_searched, Lisp_Buffer, | |
1356 | XMARKER (marker)->buffer); | |
1357 | } | |
ca1d1d23 JB |
1358 | |
1359 | CHECK_NUMBER_COERCE_MARKER (marker, 0); | |
1360 | search_regs.start[i] = XINT (marker); | |
1361 | list = Fcdr (list); | |
1362 | ||
1363 | marker = Fcar (list); | |
1364 | if (XTYPE (marker) == Lisp_Marker | |
1365 | && XMARKER (marker)->buffer == 0) | |
1366 | XFASTINT (marker) = 0; | |
1367 | ||
1368 | CHECK_NUMBER_COERCE_MARKER (marker, 0); | |
1369 | search_regs.end[i] = XINT (marker); | |
1370 | } | |
1371 | list = Fcdr (list); | |
1372 | } | |
1373 | ||
1374 | return Qnil; | |
1375 | } | |
1376 | ||
1377 | /* Quote a string to inactivate reg-expr chars */ | |
1378 | ||
1379 | DEFUN ("regexp-quote", Fregexp_quote, Sregexp_quote, 1, 1, 0, | |
1380 | "Return a regexp string which matches exactly STRING and nothing else.") | |
1381 | (str) | |
1382 | Lisp_Object str; | |
1383 | { | |
1384 | register unsigned char *in, *out, *end; | |
1385 | register unsigned char *temp; | |
1386 | ||
1387 | CHECK_STRING (str, 0); | |
1388 | ||
1389 | temp = (unsigned char *) alloca (XSTRING (str)->size * 2); | |
1390 | ||
1391 | /* Now copy the data into the new string, inserting escapes. */ | |
1392 | ||
1393 | in = XSTRING (str)->data; | |
1394 | end = in + XSTRING (str)->size; | |
1395 | out = temp; | |
1396 | ||
1397 | for (; in != end; in++) | |
1398 | { | |
1399 | if (*in == '[' || *in == ']' | |
1400 | || *in == '*' || *in == '.' || *in == '\\' | |
1401 | || *in == '?' || *in == '+' | |
1402 | || *in == '^' || *in == '$') | |
1403 | *out++ = '\\'; | |
1404 | *out++ = *in; | |
1405 | } | |
1406 | ||
1407 | return make_string (temp, out - temp); | |
1408 | } | |
1409 | \f | |
1410 | syms_of_search () | |
1411 | { | |
1412 | register int i; | |
1413 | ||
1414 | searchbuf.allocated = 100; | |
8c0e7b73 | 1415 | searchbuf.buffer = (unsigned char *) malloc (searchbuf.allocated); |
ca1d1d23 JB |
1416 | searchbuf.fastmap = search_fastmap; |
1417 | ||
1418 | Qsearch_failed = intern ("search-failed"); | |
1419 | staticpro (&Qsearch_failed); | |
1420 | Qinvalid_regexp = intern ("invalid-regexp"); | |
1421 | staticpro (&Qinvalid_regexp); | |
1422 | ||
1423 | Fput (Qsearch_failed, Qerror_conditions, | |
1424 | Fcons (Qsearch_failed, Fcons (Qerror, Qnil))); | |
1425 | Fput (Qsearch_failed, Qerror_message, | |
1426 | build_string ("Search failed")); | |
1427 | ||
1428 | Fput (Qinvalid_regexp, Qerror_conditions, | |
1429 | Fcons (Qinvalid_regexp, Fcons (Qerror, Qnil))); | |
1430 | Fput (Qinvalid_regexp, Qerror_message, | |
1431 | build_string ("Invalid regexp")); | |
1432 | ||
1433 | last_regexp = Qnil; | |
1434 | staticpro (&last_regexp); | |
1435 | ||
daa37602 JB |
1436 | last_thing_searched = Qnil; |
1437 | staticpro (&last_thing_searched); | |
1438 | ||
ca1d1d23 JB |
1439 | defsubr (&Sstring_match); |
1440 | defsubr (&Slooking_at); | |
1441 | defsubr (&Sskip_chars_forward); | |
1442 | defsubr (&Sskip_chars_backward); | |
1443 | defsubr (&Ssearch_forward); | |
1444 | defsubr (&Ssearch_backward); | |
1445 | defsubr (&Sword_search_forward); | |
1446 | defsubr (&Sword_search_backward); | |
1447 | defsubr (&Sre_search_forward); | |
1448 | defsubr (&Sre_search_backward); | |
1449 | defsubr (&Sreplace_match); | |
1450 | defsubr (&Smatch_beginning); | |
1451 | defsubr (&Smatch_end); | |
1452 | defsubr (&Smatch_data); | |
1453 | defsubr (&Sstore_match_data); | |
1454 | defsubr (&Sregexp_quote); | |
1455 | } |