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ca1d1d23 | 1 | /* String search routines for GNU Emacs. |
31c8f881 | 2 | Copyright (C) 1985, 86, 87, 93, 94, 97, 1998 Free Software Foundation, Inc. |
ca1d1d23 JB |
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 | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
ca1d1d23 JB |
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 | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
ca1d1d23 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
ca1d1d23 JB |
23 | #include "lisp.h" |
24 | #include "syntax.h" | |
5679531d | 25 | #include "category.h" |
ca1d1d23 | 26 | #include "buffer.h" |
5679531d | 27 | #include "charset.h" |
9169c321 | 28 | #include "region-cache.h" |
ca1d1d23 | 29 | #include "commands.h" |
9ac0d9e0 | 30 | #include "blockinput.h" |
bf1760bb | 31 | #include "intervals.h" |
4746118a | 32 | |
ca1d1d23 JB |
33 | #include <sys/types.h> |
34 | #include "regex.h" | |
35 | ||
67ce527d KH |
36 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
37 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
38 | ||
1d288aef | 39 | #define REGEXP_CACHE_SIZE 20 |
ca1d1d23 | 40 | |
487282dc KH |
41 | /* If the regexp is non-nil, then the buffer contains the compiled form |
42 | of that regexp, suitable for searching. */ | |
1d288aef RS |
43 | struct regexp_cache |
44 | { | |
487282dc KH |
45 | struct regexp_cache *next; |
46 | Lisp_Object regexp; | |
47 | struct re_pattern_buffer buf; | |
48 | char fastmap[0400]; | |
b819a390 RS |
49 | /* Nonzero means regexp was compiled to do full POSIX backtracking. */ |
50 | char posix; | |
487282dc | 51 | }; |
ca1d1d23 | 52 | |
487282dc KH |
53 | /* The instances of that struct. */ |
54 | struct regexp_cache searchbufs[REGEXP_CACHE_SIZE]; | |
ca1d1d23 | 55 | |
487282dc KH |
56 | /* The head of the linked list; points to the most recently used buffer. */ |
57 | struct regexp_cache *searchbuf_head; | |
ca1d1d23 | 58 | |
ca1d1d23 | 59 | |
4746118a JB |
60 | /* Every call to re_match, etc., must pass &search_regs as the regs |
61 | argument unless you can show it is unnecessary (i.e., if re_match | |
62 | is certainly going to be called again before region-around-match | |
63 | can be called). | |
64 | ||
65 | Since the registers are now dynamically allocated, we need to make | |
66 | sure not to refer to the Nth register before checking that it has | |
1113d9db JB |
67 | been allocated by checking search_regs.num_regs. |
68 | ||
69 | The regex code keeps track of whether it has allocated the search | |
487282dc KH |
70 | buffer using bits in the re_pattern_buffer. This means that whenever |
71 | you compile a new pattern, it completely forgets whether it has | |
1113d9db JB |
72 | allocated any registers, and will allocate new registers the next |
73 | time you call a searching or matching function. Therefore, we need | |
74 | to call re_set_registers after compiling a new pattern or after | |
75 | setting the match registers, so that the regex functions will be | |
76 | able to free or re-allocate it properly. */ | |
ca1d1d23 JB |
77 | static struct re_registers search_regs; |
78 | ||
daa37602 JB |
79 | /* The buffer in which the last search was performed, or |
80 | Qt if the last search was done in a string; | |
81 | Qnil if no searching has been done yet. */ | |
82 | static Lisp_Object last_thing_searched; | |
ca1d1d23 | 83 | |
8e6208c5 | 84 | /* error condition signaled when regexp compile_pattern fails */ |
ca1d1d23 JB |
85 | |
86 | Lisp_Object Qinvalid_regexp; | |
87 | ||
ca325161 | 88 | static void set_search_regs (); |
044f81f1 | 89 | static void save_search_regs (); |
facdc750 RS |
90 | static int simple_search (); |
91 | static int boyer_moore (); | |
b819a390 RS |
92 | static int search_buffer (); |
93 | ||
ca1d1d23 JB |
94 | static void |
95 | matcher_overflow () | |
96 | { | |
97 | error ("Stack overflow in regexp matcher"); | |
98 | } | |
99 | ||
100 | #ifdef __STDC__ | |
101 | #define CONST const | |
102 | #else | |
103 | #define CONST | |
104 | #endif | |
105 | ||
b819a390 RS |
106 | /* Compile a regexp and signal a Lisp error if anything goes wrong. |
107 | PATTERN is the pattern to compile. | |
108 | CP is the place to put the result. | |
facdc750 | 109 | TRANSLATE is a translation table for ignoring case, or nil for none. |
b819a390 RS |
110 | REGP is the structure that says where to store the "register" |
111 | values that will result from matching this pattern. | |
112 | If it is 0, we should compile the pattern not to record any | |
113 | subexpression bounds. | |
114 | POSIX is nonzero if we want full backtracking (POSIX style) | |
5679531d KH |
115 | for this pattern. 0 means backtrack only enough to get a valid match. |
116 | MULTIBYTE is nonzero if we want to handle multibyte characters in | |
117 | PATTERN. 0 means all multibyte characters are recognized just as | |
118 | sequences of binary data. */ | |
ca1d1d23 | 119 | |
487282dc | 120 | static void |
5679531d | 121 | compile_pattern_1 (cp, pattern, translate, regp, posix, multibyte) |
487282dc | 122 | struct regexp_cache *cp; |
ca1d1d23 | 123 | Lisp_Object pattern; |
facdc750 | 124 | Lisp_Object translate; |
487282dc | 125 | struct re_registers *regp; |
b819a390 | 126 | int posix; |
5679531d | 127 | int multibyte; |
ca1d1d23 | 128 | { |
f8bd51c4 KH |
129 | char *raw_pattern; |
130 | int raw_pattern_size; | |
d451e4db | 131 | char *val; |
b819a390 | 132 | reg_syntax_t old; |
ca1d1d23 | 133 | |
f8bd51c4 KH |
134 | /* MULTIBYTE says whether the text to be searched is multibyte. |
135 | We must convert PATTERN to match that, or we will not really | |
136 | find things right. */ | |
137 | ||
138 | if (multibyte == STRING_MULTIBYTE (pattern)) | |
139 | { | |
140 | raw_pattern = (char *) XSTRING (pattern)->data; | |
fc932ac6 | 141 | raw_pattern_size = STRING_BYTES (XSTRING (pattern)); |
f8bd51c4 KH |
142 | } |
143 | else if (multibyte) | |
144 | { | |
145 | raw_pattern_size = count_size_as_multibyte (XSTRING (pattern)->data, | |
146 | XSTRING (pattern)->size); | |
147 | raw_pattern = (char *) alloca (raw_pattern_size + 1); | |
148 | copy_text (XSTRING (pattern)->data, raw_pattern, | |
149 | XSTRING (pattern)->size, 0, 1); | |
150 | } | |
151 | else | |
152 | { | |
153 | /* Converting multibyte to single-byte. | |
154 | ||
155 | ??? Perhaps this conversion should be done in a special way | |
156 | by subtracting nonascii-insert-offset from each non-ASCII char, | |
157 | so that only the multibyte chars which really correspond to | |
158 | the chosen single-byte character set can possibly match. */ | |
159 | raw_pattern_size = XSTRING (pattern)->size; | |
160 | raw_pattern = (char *) alloca (raw_pattern_size + 1); | |
161 | copy_text (XSTRING (pattern)->data, raw_pattern, | |
fc932ac6 | 162 | STRING_BYTES (XSTRING (pattern)), 1, 0); |
f8bd51c4 KH |
163 | } |
164 | ||
487282dc | 165 | cp->regexp = Qnil; |
facdc750 | 166 | cp->buf.translate = (! NILP (translate) ? translate : 0); |
b819a390 | 167 | cp->posix = posix; |
5679531d | 168 | cp->buf.multibyte = multibyte; |
9ac0d9e0 | 169 | BLOCK_INPUT; |
b819a390 RS |
170 | old = re_set_syntax (RE_SYNTAX_EMACS |
171 | | (posix ? 0 : RE_NO_POSIX_BACKTRACKING)); | |
f8bd51c4 | 172 | val = (char *) re_compile_pattern (raw_pattern, raw_pattern_size, &cp->buf); |
b819a390 | 173 | re_set_syntax (old); |
9ac0d9e0 | 174 | UNBLOCK_INPUT; |
ca1d1d23 | 175 | if (val) |
487282dc | 176 | Fsignal (Qinvalid_regexp, Fcons (build_string (val), Qnil)); |
1113d9db | 177 | |
487282dc | 178 | cp->regexp = Fcopy_sequence (pattern); |
487282dc KH |
179 | } |
180 | ||
181 | /* Compile a regexp if necessary, but first check to see if there's one in | |
b819a390 RS |
182 | the cache. |
183 | PATTERN is the pattern to compile. | |
facdc750 | 184 | TRANSLATE is a translation table for ignoring case, or nil for none. |
b819a390 RS |
185 | REGP is the structure that says where to store the "register" |
186 | values that will result from matching this pattern. | |
187 | If it is 0, we should compile the pattern not to record any | |
188 | subexpression bounds. | |
189 | POSIX is nonzero if we want full backtracking (POSIX style) | |
190 | for this pattern. 0 means backtrack only enough to get a valid match. */ | |
487282dc KH |
191 | |
192 | struct re_pattern_buffer * | |
0c8533c6 | 193 | compile_pattern (pattern, regp, translate, posix, multibyte) |
487282dc KH |
194 | Lisp_Object pattern; |
195 | struct re_registers *regp; | |
facdc750 | 196 | Lisp_Object translate; |
0c8533c6 | 197 | int posix, multibyte; |
487282dc KH |
198 | { |
199 | struct regexp_cache *cp, **cpp; | |
200 | ||
201 | for (cpp = &searchbuf_head; ; cpp = &cp->next) | |
202 | { | |
203 | cp = *cpp; | |
1d288aef RS |
204 | if (XSTRING (cp->regexp)->size == XSTRING (pattern)->size |
205 | && !NILP (Fstring_equal (cp->regexp, pattern)) | |
facdc750 | 206 | && cp->buf.translate == (! NILP (translate) ? translate : 0) |
5679531d KH |
207 | && cp->posix == posix |
208 | && cp->buf.multibyte == multibyte) | |
487282dc KH |
209 | break; |
210 | ||
211 | /* If we're at the end of the cache, compile into the last cell. */ | |
212 | if (cp->next == 0) | |
213 | { | |
5679531d | 214 | compile_pattern_1 (cp, pattern, translate, regp, posix, multibyte); |
487282dc KH |
215 | break; |
216 | } | |
217 | } | |
218 | ||
219 | /* When we get here, cp (aka *cpp) contains the compiled pattern, | |
220 | either because we found it in the cache or because we just compiled it. | |
221 | Move it to the front of the queue to mark it as most recently used. */ | |
222 | *cpp = cp->next; | |
223 | cp->next = searchbuf_head; | |
224 | searchbuf_head = cp; | |
1113d9db | 225 | |
6639708c RS |
226 | /* Advise the searching functions about the space we have allocated |
227 | for register data. */ | |
228 | if (regp) | |
229 | re_set_registers (&cp->buf, regp, regp->num_regs, regp->start, regp->end); | |
230 | ||
487282dc | 231 | return &cp->buf; |
ca1d1d23 JB |
232 | } |
233 | ||
234 | /* Error condition used for failing searches */ | |
235 | Lisp_Object Qsearch_failed; | |
236 | ||
237 | Lisp_Object | |
238 | signal_failure (arg) | |
239 | Lisp_Object arg; | |
240 | { | |
241 | Fsignal (Qsearch_failed, Fcons (arg, Qnil)); | |
242 | return Qnil; | |
243 | } | |
244 | \f | |
b819a390 RS |
245 | static Lisp_Object |
246 | looking_at_1 (string, posix) | |
ca1d1d23 | 247 | Lisp_Object string; |
b819a390 | 248 | int posix; |
ca1d1d23 JB |
249 | { |
250 | Lisp_Object val; | |
251 | unsigned char *p1, *p2; | |
252 | int s1, s2; | |
253 | register int i; | |
487282dc | 254 | struct re_pattern_buffer *bufp; |
ca1d1d23 | 255 | |
7074fde6 FP |
256 | if (running_asynch_code) |
257 | save_search_regs (); | |
258 | ||
ca1d1d23 | 259 | CHECK_STRING (string, 0); |
487282dc KH |
260 | bufp = compile_pattern (string, &search_regs, |
261 | (!NILP (current_buffer->case_fold_search) | |
facdc750 | 262 | ? DOWNCASE_TABLE : Qnil), |
0c8533c6 RS |
263 | posix, |
264 | !NILP (current_buffer->enable_multibyte_characters)); | |
ca1d1d23 JB |
265 | |
266 | immediate_quit = 1; | |
267 | QUIT; /* Do a pending quit right away, to avoid paradoxical behavior */ | |
268 | ||
269 | /* Get pointers and sizes of the two strings | |
270 | that make up the visible portion of the buffer. */ | |
271 | ||
272 | p1 = BEGV_ADDR; | |
fa8ed3e0 | 273 | s1 = GPT_BYTE - BEGV_BYTE; |
ca1d1d23 | 274 | p2 = GAP_END_ADDR; |
fa8ed3e0 | 275 | s2 = ZV_BYTE - GPT_BYTE; |
ca1d1d23 JB |
276 | if (s1 < 0) |
277 | { | |
278 | p2 = p1; | |
fa8ed3e0 | 279 | s2 = ZV_BYTE - BEGV_BYTE; |
ca1d1d23 JB |
280 | s1 = 0; |
281 | } | |
282 | if (s2 < 0) | |
283 | { | |
fa8ed3e0 | 284 | s1 = ZV_BYTE - BEGV_BYTE; |
ca1d1d23 JB |
285 | s2 = 0; |
286 | } | |
8bb43c28 RS |
287 | |
288 | re_match_object = Qnil; | |
ca1d1d23 | 289 | |
487282dc | 290 | i = re_match_2 (bufp, (char *) p1, s1, (char *) p2, s2, |
fa8ed3e0 RS |
291 | PT_BYTE - BEGV_BYTE, &search_regs, |
292 | ZV_BYTE - BEGV_BYTE); | |
ca1d1d23 JB |
293 | if (i == -2) |
294 | matcher_overflow (); | |
295 | ||
296 | val = (0 <= i ? Qt : Qnil); | |
fa8ed3e0 RS |
297 | if (i >= 0) |
298 | for (i = 0; i < search_regs.num_regs; i++) | |
299 | if (search_regs.start[i] >= 0) | |
300 | { | |
301 | search_regs.start[i] | |
302 | = BYTE_TO_CHAR (search_regs.start[i] + BEGV_BYTE); | |
303 | search_regs.end[i] | |
304 | = BYTE_TO_CHAR (search_regs.end[i] + BEGV_BYTE); | |
305 | } | |
a3668d92 | 306 | XSETBUFFER (last_thing_searched, current_buffer); |
ca1d1d23 JB |
307 | immediate_quit = 0; |
308 | return val; | |
309 | } | |
310 | ||
b819a390 | 311 | DEFUN ("looking-at", Flooking_at, Slooking_at, 1, 1, 0, |
94f94972 | 312 | "Return t if text after point matches regular expression REGEXP.\n\ |
b819a390 RS |
313 | This function modifies the match data that `match-beginning',\n\ |
314 | `match-end' and `match-data' access; save and restore the match\n\ | |
315 | data if you want to preserve them.") | |
94f94972 RS |
316 | (regexp) |
317 | Lisp_Object regexp; | |
b819a390 | 318 | { |
94f94972 | 319 | return looking_at_1 (regexp, 0); |
b819a390 RS |
320 | } |
321 | ||
322 | DEFUN ("posix-looking-at", Fposix_looking_at, Sposix_looking_at, 1, 1, 0, | |
94f94972 | 323 | "Return t if text after point matches regular expression REGEXP.\n\ |
b819a390 RS |
324 | Find the longest match, in accord with Posix regular expression rules.\n\ |
325 | This function modifies the match data that `match-beginning',\n\ | |
326 | `match-end' and `match-data' access; save and restore the match\n\ | |
327 | data if you want to preserve them.") | |
94f94972 RS |
328 | (regexp) |
329 | Lisp_Object regexp; | |
b819a390 | 330 | { |
94f94972 | 331 | return looking_at_1 (regexp, 1); |
b819a390 RS |
332 | } |
333 | \f | |
334 | static Lisp_Object | |
335 | string_match_1 (regexp, string, start, posix) | |
ca1d1d23 | 336 | Lisp_Object regexp, string, start; |
b819a390 | 337 | int posix; |
ca1d1d23 JB |
338 | { |
339 | int val; | |
487282dc | 340 | struct re_pattern_buffer *bufp; |
0c8533c6 RS |
341 | int pos, pos_byte; |
342 | int i; | |
ca1d1d23 | 343 | |
7074fde6 FP |
344 | if (running_asynch_code) |
345 | save_search_regs (); | |
346 | ||
ca1d1d23 JB |
347 | CHECK_STRING (regexp, 0); |
348 | CHECK_STRING (string, 1); | |
349 | ||
350 | if (NILP (start)) | |
0c8533c6 | 351 | pos = 0, pos_byte = 0; |
ca1d1d23 JB |
352 | else |
353 | { | |
354 | int len = XSTRING (string)->size; | |
355 | ||
356 | CHECK_NUMBER (start, 2); | |
0c8533c6 RS |
357 | pos = XINT (start); |
358 | if (pos < 0 && -pos <= len) | |
359 | pos = len + pos; | |
360 | else if (0 > pos || pos > len) | |
ca1d1d23 | 361 | args_out_of_range (string, start); |
0c8533c6 | 362 | pos_byte = string_char_to_byte (string, pos); |
ca1d1d23 JB |
363 | } |
364 | ||
487282dc KH |
365 | bufp = compile_pattern (regexp, &search_regs, |
366 | (!NILP (current_buffer->case_fold_search) | |
facdc750 | 367 | ? DOWNCASE_TABLE : Qnil), |
0c8533c6 RS |
368 | posix, |
369 | STRING_MULTIBYTE (string)); | |
ca1d1d23 | 370 | immediate_quit = 1; |
8bb43c28 RS |
371 | re_match_object = string; |
372 | ||
487282dc | 373 | val = re_search (bufp, (char *) XSTRING (string)->data, |
fc932ac6 RS |
374 | STRING_BYTES (XSTRING (string)), pos_byte, |
375 | STRING_BYTES (XSTRING (string)) - pos_byte, | |
ca1d1d23 JB |
376 | &search_regs); |
377 | immediate_quit = 0; | |
daa37602 | 378 | last_thing_searched = Qt; |
ca1d1d23 JB |
379 | if (val == -2) |
380 | matcher_overflow (); | |
381 | if (val < 0) return Qnil; | |
0c8533c6 RS |
382 | |
383 | for (i = 0; i < search_regs.num_regs; i++) | |
384 | if (search_regs.start[i] >= 0) | |
385 | { | |
386 | search_regs.start[i] | |
387 | = string_byte_to_char (string, search_regs.start[i]); | |
388 | search_regs.end[i] | |
389 | = string_byte_to_char (string, search_regs.end[i]); | |
390 | } | |
391 | ||
392 | return make_number (string_byte_to_char (string, val)); | |
ca1d1d23 | 393 | } |
e59a8453 | 394 | |
b819a390 RS |
395 | DEFUN ("string-match", Fstring_match, Sstring_match, 2, 3, 0, |
396 | "Return index of start of first match for REGEXP in STRING, or nil.\n\ | |
397 | If third arg START is non-nil, start search at that index in STRING.\n\ | |
398 | For index of first char beyond the match, do (match-end 0).\n\ | |
399 | `match-end' and `match-beginning' also give indices of substrings\n\ | |
400 | matched by parenthesis constructs in the pattern.") | |
401 | (regexp, string, start) | |
402 | Lisp_Object regexp, string, start; | |
403 | { | |
404 | return string_match_1 (regexp, string, start, 0); | |
405 | } | |
406 | ||
407 | DEFUN ("posix-string-match", Fposix_string_match, Sposix_string_match, 2, 3, 0, | |
408 | "Return index of start of first match for REGEXP in STRING, or nil.\n\ | |
409 | Find the longest match, in accord with Posix regular expression rules.\n\ | |
410 | If third arg START is non-nil, start search at that index in STRING.\n\ | |
411 | For index of first char beyond the match, do (match-end 0).\n\ | |
412 | `match-end' and `match-beginning' also give indices of substrings\n\ | |
413 | matched by parenthesis constructs in the pattern.") | |
414 | (regexp, string, start) | |
415 | Lisp_Object regexp, string, start; | |
416 | { | |
417 | return string_match_1 (regexp, string, start, 1); | |
418 | } | |
419 | ||
e59a8453 RS |
420 | /* Match REGEXP against STRING, searching all of STRING, |
421 | and return the index of the match, or negative on failure. | |
422 | This does not clobber the match data. */ | |
423 | ||
424 | int | |
425 | fast_string_match (regexp, string) | |
426 | Lisp_Object regexp, string; | |
427 | { | |
428 | int val; | |
487282dc | 429 | struct re_pattern_buffer *bufp; |
e59a8453 | 430 | |
facdc750 RS |
431 | bufp = compile_pattern (regexp, 0, Qnil, |
432 | 0, STRING_MULTIBYTE (string)); | |
e59a8453 | 433 | immediate_quit = 1; |
8bb43c28 RS |
434 | re_match_object = string; |
435 | ||
487282dc | 436 | val = re_search (bufp, (char *) XSTRING (string)->data, |
fc932ac6 RS |
437 | STRING_BYTES (XSTRING (string)), 0, |
438 | STRING_BYTES (XSTRING (string)), 0); | |
e59a8453 RS |
439 | immediate_quit = 0; |
440 | return val; | |
441 | } | |
5679531d KH |
442 | |
443 | /* Match REGEXP against STRING, searching all of STRING ignoring case, | |
444 | and return the index of the match, or negative on failure. | |
0c8533c6 RS |
445 | This does not clobber the match data. |
446 | We assume that STRING contains single-byte characters. */ | |
5679531d KH |
447 | |
448 | extern Lisp_Object Vascii_downcase_table; | |
449 | ||
450 | int | |
b4577c63 | 451 | fast_c_string_match_ignore_case (regexp, string) |
5679531d KH |
452 | Lisp_Object regexp; |
453 | char *string; | |
454 | { | |
455 | int val; | |
456 | struct re_pattern_buffer *bufp; | |
457 | int len = strlen (string); | |
458 | ||
0c8533c6 | 459 | regexp = string_make_unibyte (regexp); |
b4577c63 | 460 | re_match_object = Qt; |
5679531d | 461 | bufp = compile_pattern (regexp, 0, |
facdc750 | 462 | Vascii_downcase_table, 0, |
f8bd51c4 | 463 | 0); |
5679531d KH |
464 | immediate_quit = 1; |
465 | val = re_search (bufp, string, len, 0, len, 0); | |
466 | immediate_quit = 0; | |
467 | return val; | |
468 | } | |
ca1d1d23 | 469 | \f |
9169c321 JB |
470 | /* The newline cache: remembering which sections of text have no newlines. */ |
471 | ||
472 | /* If the user has requested newline caching, make sure it's on. | |
473 | Otherwise, make sure it's off. | |
474 | This is our cheezy way of associating an action with the change of | |
475 | state of a buffer-local variable. */ | |
476 | static void | |
477 | newline_cache_on_off (buf) | |
478 | struct buffer *buf; | |
479 | { | |
480 | if (NILP (buf->cache_long_line_scans)) | |
481 | { | |
482 | /* It should be off. */ | |
483 | if (buf->newline_cache) | |
484 | { | |
485 | free_region_cache (buf->newline_cache); | |
486 | buf->newline_cache = 0; | |
487 | } | |
488 | } | |
489 | else | |
490 | { | |
491 | /* It should be on. */ | |
492 | if (buf->newline_cache == 0) | |
493 | buf->newline_cache = new_region_cache (); | |
494 | } | |
495 | } | |
496 | ||
497 | \f | |
498 | /* Search for COUNT instances of the character TARGET between START and END. | |
499 | ||
500 | If COUNT is positive, search forwards; END must be >= START. | |
501 | If COUNT is negative, search backwards for the -COUNTth instance; | |
502 | END must be <= START. | |
503 | If COUNT is zero, do anything you please; run rogue, for all I care. | |
504 | ||
505 | If END is zero, use BEGV or ZV instead, as appropriate for the | |
506 | direction indicated by COUNT. | |
ffd56f97 JB |
507 | |
508 | If we find COUNT instances, set *SHORTAGE to zero, and return the | |
5bfe95c9 RS |
509 | position after the COUNTth match. Note that for reverse motion |
510 | this is not the same as the usual convention for Emacs motion commands. | |
ffd56f97 | 511 | |
9169c321 JB |
512 | If we don't find COUNT instances before reaching END, set *SHORTAGE |
513 | to the number of TARGETs left unfound, and return END. | |
ffd56f97 | 514 | |
087a5f81 RS |
515 | If ALLOW_QUIT is non-zero, set immediate_quit. That's good to do |
516 | except when inside redisplay. */ | |
517 | ||
9169c321 JB |
518 | scan_buffer (target, start, end, count, shortage, allow_quit) |
519 | register int target; | |
520 | int start, end; | |
521 | int count; | |
522 | int *shortage; | |
087a5f81 | 523 | int allow_quit; |
ca1d1d23 | 524 | { |
9169c321 JB |
525 | struct region_cache *newline_cache; |
526 | int direction; | |
ffd56f97 | 527 | |
9169c321 JB |
528 | if (count > 0) |
529 | { | |
530 | direction = 1; | |
531 | if (! end) end = ZV; | |
532 | } | |
533 | else | |
534 | { | |
535 | direction = -1; | |
536 | if (! end) end = BEGV; | |
537 | } | |
ffd56f97 | 538 | |
9169c321 JB |
539 | newline_cache_on_off (current_buffer); |
540 | newline_cache = current_buffer->newline_cache; | |
ca1d1d23 JB |
541 | |
542 | if (shortage != 0) | |
543 | *shortage = 0; | |
544 | ||
087a5f81 | 545 | immediate_quit = allow_quit; |
ca1d1d23 | 546 | |
ffd56f97 | 547 | if (count > 0) |
9169c321 | 548 | while (start != end) |
ca1d1d23 | 549 | { |
9169c321 JB |
550 | /* Our innermost scanning loop is very simple; it doesn't know |
551 | about gaps, buffer ends, or the newline cache. ceiling is | |
552 | the position of the last character before the next such | |
553 | obstacle --- the last character the dumb search loop should | |
554 | examine. */ | |
fa8ed3e0 RS |
555 | int ceiling_byte = CHAR_TO_BYTE (end) - 1; |
556 | int start_byte = CHAR_TO_BYTE (start); | |
67ce527d | 557 | int tem; |
9169c321 JB |
558 | |
559 | /* If we're looking for a newline, consult the newline cache | |
560 | to see where we can avoid some scanning. */ | |
561 | if (target == '\n' && newline_cache) | |
562 | { | |
563 | int next_change; | |
564 | immediate_quit = 0; | |
565 | while (region_cache_forward | |
fa8ed3e0 RS |
566 | (current_buffer, newline_cache, start_byte, &next_change)) |
567 | start_byte = next_change; | |
cbe0db0d | 568 | immediate_quit = allow_quit; |
9169c321 | 569 | |
fa8ed3e0 RS |
570 | /* START should never be after END. */ |
571 | if (start_byte > ceiling_byte) | |
572 | start_byte = ceiling_byte; | |
9169c321 JB |
573 | |
574 | /* Now the text after start is an unknown region, and | |
575 | next_change is the position of the next known region. */ | |
fa8ed3e0 | 576 | ceiling_byte = min (next_change - 1, ceiling_byte); |
9169c321 JB |
577 | } |
578 | ||
579 | /* The dumb loop can only scan text stored in contiguous | |
580 | bytes. BUFFER_CEILING_OF returns the last character | |
581 | position that is contiguous, so the ceiling is the | |
582 | position after that. */ | |
67ce527d KH |
583 | tem = BUFFER_CEILING_OF (start_byte); |
584 | ceiling_byte = min (tem, ceiling_byte); | |
9169c321 JB |
585 | |
586 | { | |
587 | /* The termination address of the dumb loop. */ | |
fa8ed3e0 RS |
588 | register unsigned char *ceiling_addr |
589 | = BYTE_POS_ADDR (ceiling_byte) + 1; | |
590 | register unsigned char *cursor | |
591 | = BYTE_POS_ADDR (start_byte); | |
9169c321 JB |
592 | unsigned char *base = cursor; |
593 | ||
594 | while (cursor < ceiling_addr) | |
595 | { | |
596 | unsigned char *scan_start = cursor; | |
597 | ||
598 | /* The dumb loop. */ | |
599 | while (*cursor != target && ++cursor < ceiling_addr) | |
600 | ; | |
601 | ||
602 | /* If we're looking for newlines, cache the fact that | |
603 | the region from start to cursor is free of them. */ | |
604 | if (target == '\n' && newline_cache) | |
605 | know_region_cache (current_buffer, newline_cache, | |
fa8ed3e0 RS |
606 | start_byte + scan_start - base, |
607 | start_byte + cursor - base); | |
9169c321 JB |
608 | |
609 | /* Did we find the target character? */ | |
610 | if (cursor < ceiling_addr) | |
611 | { | |
612 | if (--count == 0) | |
613 | { | |
614 | immediate_quit = 0; | |
fa8ed3e0 | 615 | return BYTE_TO_CHAR (start_byte + cursor - base + 1); |
9169c321 JB |
616 | } |
617 | cursor++; | |
618 | } | |
619 | } | |
620 | ||
fa8ed3e0 | 621 | start = BYTE_TO_CHAR (start_byte + cursor - base); |
9169c321 | 622 | } |
ca1d1d23 JB |
623 | } |
624 | else | |
9169c321 JB |
625 | while (start > end) |
626 | { | |
627 | /* The last character to check before the next obstacle. */ | |
fa8ed3e0 RS |
628 | int ceiling_byte = CHAR_TO_BYTE (end); |
629 | int start_byte = CHAR_TO_BYTE (start); | |
67ce527d | 630 | int tem; |
9169c321 JB |
631 | |
632 | /* Consult the newline cache, if appropriate. */ | |
633 | if (target == '\n' && newline_cache) | |
634 | { | |
635 | int next_change; | |
636 | immediate_quit = 0; | |
637 | while (region_cache_backward | |
fa8ed3e0 RS |
638 | (current_buffer, newline_cache, start_byte, &next_change)) |
639 | start_byte = next_change; | |
cbe0db0d | 640 | immediate_quit = allow_quit; |
9169c321 JB |
641 | |
642 | /* Start should never be at or before end. */ | |
fa8ed3e0 RS |
643 | if (start_byte <= ceiling_byte) |
644 | start_byte = ceiling_byte + 1; | |
9169c321 JB |
645 | |
646 | /* Now the text before start is an unknown region, and | |
647 | next_change is the position of the next known region. */ | |
fa8ed3e0 | 648 | ceiling_byte = max (next_change, ceiling_byte); |
9169c321 JB |
649 | } |
650 | ||
651 | /* Stop scanning before the gap. */ | |
67ce527d KH |
652 | tem = BUFFER_FLOOR_OF (start_byte - 1); |
653 | ceiling_byte = max (tem, ceiling_byte); | |
9169c321 JB |
654 | |
655 | { | |
656 | /* The termination address of the dumb loop. */ | |
fa8ed3e0 RS |
657 | register unsigned char *ceiling_addr = BYTE_POS_ADDR (ceiling_byte); |
658 | register unsigned char *cursor = BYTE_POS_ADDR (start_byte - 1); | |
9169c321 JB |
659 | unsigned char *base = cursor; |
660 | ||
661 | while (cursor >= ceiling_addr) | |
662 | { | |
663 | unsigned char *scan_start = cursor; | |
664 | ||
665 | while (*cursor != target && --cursor >= ceiling_addr) | |
666 | ; | |
667 | ||
668 | /* If we're looking for newlines, cache the fact that | |
669 | the region from after the cursor to start is free of them. */ | |
670 | if (target == '\n' && newline_cache) | |
671 | know_region_cache (current_buffer, newline_cache, | |
fa8ed3e0 RS |
672 | start_byte + cursor - base, |
673 | start_byte + scan_start - base); | |
9169c321 JB |
674 | |
675 | /* Did we find the target character? */ | |
676 | if (cursor >= ceiling_addr) | |
677 | { | |
678 | if (++count >= 0) | |
679 | { | |
680 | immediate_quit = 0; | |
fa8ed3e0 | 681 | return BYTE_TO_CHAR (start_byte + cursor - base); |
9169c321 JB |
682 | } |
683 | cursor--; | |
684 | } | |
685 | } | |
686 | ||
fa8ed3e0 | 687 | start = BYTE_TO_CHAR (start_byte + cursor - base); |
9169c321 JB |
688 | } |
689 | } | |
690 | ||
ca1d1d23 JB |
691 | immediate_quit = 0; |
692 | if (shortage != 0) | |
ffd56f97 | 693 | *shortage = count * direction; |
9169c321 | 694 | return start; |
ca1d1d23 | 695 | } |
fa8ed3e0 RS |
696 | \f |
697 | /* Search for COUNT instances of a line boundary, which means either a | |
698 | newline or (if selective display enabled) a carriage return. | |
699 | Start at START. If COUNT is negative, search backwards. | |
700 | ||
701 | We report the resulting position by calling TEMP_SET_PT_BOTH. | |
702 | ||
703 | If we find COUNT instances. we position after (always after, | |
704 | even if scanning backwards) the COUNTth match, and return 0. | |
705 | ||
706 | If we don't find COUNT instances before reaching the end of the | |
707 | buffer (or the beginning, if scanning backwards), we return | |
708 | the number of line boundaries left unfound, and position at | |
709 | the limit we bumped up against. | |
710 | ||
711 | If ALLOW_QUIT is non-zero, set immediate_quit. That's good to do | |
d5d57b92 | 712 | except in special cases. */ |
ca1d1d23 | 713 | |
63fa018d | 714 | int |
fa8ed3e0 RS |
715 | scan_newline (start, start_byte, limit, limit_byte, count, allow_quit) |
716 | int start, start_byte; | |
717 | int limit, limit_byte; | |
718 | register int count; | |
719 | int allow_quit; | |
63fa018d | 720 | { |
fa8ed3e0 RS |
721 | int direction = ((count > 0) ? 1 : -1); |
722 | ||
723 | register unsigned char *cursor; | |
724 | unsigned char *base; | |
725 | ||
726 | register int ceiling; | |
727 | register unsigned char *ceiling_addr; | |
728 | ||
d5d57b92 RS |
729 | int old_immediate_quit = immediate_quit; |
730 | ||
fa8ed3e0 RS |
731 | /* If we are not in selective display mode, |
732 | check only for newlines. */ | |
733 | int selective_display = (!NILP (current_buffer->selective_display) | |
734 | && !INTEGERP (current_buffer->selective_display)); | |
735 | ||
736 | /* The code that follows is like scan_buffer | |
737 | but checks for either newline or carriage return. */ | |
738 | ||
d5d57b92 RS |
739 | if (allow_quit) |
740 | immediate_quit++; | |
fa8ed3e0 RS |
741 | |
742 | start_byte = CHAR_TO_BYTE (start); | |
743 | ||
744 | if (count > 0) | |
745 | { | |
746 | while (start_byte < limit_byte) | |
747 | { | |
748 | ceiling = BUFFER_CEILING_OF (start_byte); | |
749 | ceiling = min (limit_byte - 1, ceiling); | |
750 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
751 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
752 | while (1) | |
753 | { | |
754 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
755 | ; | |
756 | ||
757 | if (cursor != ceiling_addr) | |
758 | { | |
759 | if (--count == 0) | |
760 | { | |
d5d57b92 | 761 | immediate_quit = old_immediate_quit; |
fa8ed3e0 RS |
762 | start_byte = start_byte + cursor - base + 1; |
763 | start = BYTE_TO_CHAR (start_byte); | |
764 | TEMP_SET_PT_BOTH (start, start_byte); | |
765 | return 0; | |
766 | } | |
767 | else | |
768 | if (++cursor == ceiling_addr) | |
769 | break; | |
770 | } | |
771 | else | |
772 | break; | |
773 | } | |
774 | start_byte += cursor - base; | |
775 | } | |
776 | } | |
777 | else | |
778 | { | |
fa8ed3e0 RS |
779 | while (start_byte > limit_byte) |
780 | { | |
781 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
782 | ceiling = max (limit_byte, ceiling); | |
783 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
784 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
785 | while (1) | |
786 | { | |
787 | while (--cursor != ceiling_addr && *cursor != '\n') | |
788 | ; | |
789 | ||
790 | if (cursor != ceiling_addr) | |
791 | { | |
792 | if (++count == 0) | |
793 | { | |
d5d57b92 | 794 | immediate_quit = old_immediate_quit; |
fa8ed3e0 RS |
795 | /* Return the position AFTER the match we found. */ |
796 | start_byte = start_byte + cursor - base + 1; | |
797 | start = BYTE_TO_CHAR (start_byte); | |
798 | TEMP_SET_PT_BOTH (start, start_byte); | |
799 | return 0; | |
800 | } | |
801 | } | |
802 | else | |
803 | break; | |
804 | } | |
805 | /* Here we add 1 to compensate for the last decrement | |
806 | of CURSOR, which took it past the valid range. */ | |
807 | start_byte += cursor - base + 1; | |
808 | } | |
809 | } | |
810 | ||
811 | TEMP_SET_PT_BOTH (limit, limit_byte); | |
d5d57b92 | 812 | immediate_quit = old_immediate_quit; |
fa8ed3e0 RS |
813 | |
814 | return count * direction; | |
63fa018d RS |
815 | } |
816 | ||
ca1d1d23 | 817 | int |
fa8ed3e0 | 818 | find_next_newline_no_quit (from, cnt) |
ca1d1d23 JB |
819 | register int from, cnt; |
820 | { | |
fa8ed3e0 | 821 | return scan_buffer ('\n', from, 0, cnt, (int *) 0, 0); |
9169c321 JB |
822 | } |
823 | ||
9169c321 JB |
824 | /* Like find_next_newline, but returns position before the newline, |
825 | not after, and only search up to TO. This isn't just | |
826 | find_next_newline (...)-1, because you might hit TO. */ | |
fa8ed3e0 | 827 | |
9169c321 JB |
828 | int |
829 | find_before_next_newline (from, to, cnt) | |
cbe0db0d | 830 | int from, to, cnt; |
9169c321 JB |
831 | { |
832 | int shortage; | |
833 | int pos = scan_buffer ('\n', from, to, cnt, &shortage, 1); | |
834 | ||
835 | if (shortage == 0) | |
836 | pos--; | |
837 | ||
838 | return pos; | |
ca1d1d23 JB |
839 | } |
840 | \f | |
ca1d1d23 JB |
841 | /* Subroutines of Lisp buffer search functions. */ |
842 | ||
843 | static Lisp_Object | |
b819a390 | 844 | search_command (string, bound, noerror, count, direction, RE, posix) |
ca1d1d23 JB |
845 | Lisp_Object string, bound, noerror, count; |
846 | int direction; | |
847 | int RE; | |
b819a390 | 848 | int posix; |
ca1d1d23 JB |
849 | { |
850 | register int np; | |
9f43ad85 | 851 | int lim, lim_byte; |
ca1d1d23 JB |
852 | int n = direction; |
853 | ||
854 | if (!NILP (count)) | |
855 | { | |
856 | CHECK_NUMBER (count, 3); | |
857 | n *= XINT (count); | |
858 | } | |
859 | ||
860 | CHECK_STRING (string, 0); | |
861 | if (NILP (bound)) | |
9f43ad85 RS |
862 | { |
863 | if (n > 0) | |
864 | lim = ZV, lim_byte = ZV_BYTE; | |
865 | else | |
866 | lim = BEGV, lim_byte = BEGV_BYTE; | |
867 | } | |
ca1d1d23 JB |
868 | else |
869 | { | |
870 | CHECK_NUMBER_COERCE_MARKER (bound, 1); | |
871 | lim = XINT (bound); | |
6ec8bbd2 | 872 | if (n > 0 ? lim < PT : lim > PT) |
ca1d1d23 JB |
873 | error ("Invalid search bound (wrong side of point)"); |
874 | if (lim > ZV) | |
9f43ad85 | 875 | lim = ZV, lim_byte = ZV_BYTE; |
588d2fd5 | 876 | else if (lim < BEGV) |
9f43ad85 | 877 | lim = BEGV, lim_byte = BEGV_BYTE; |
588d2fd5 KH |
878 | else |
879 | lim_byte = CHAR_TO_BYTE (lim); | |
ca1d1d23 JB |
880 | } |
881 | ||
9f43ad85 | 882 | np = search_buffer (string, PT, PT_BYTE, lim, lim_byte, n, RE, |
ca1d1d23 | 883 | (!NILP (current_buffer->case_fold_search) |
facdc750 | 884 | ? current_buffer->case_canon_table |
3135e9fd | 885 | : Qnil), |
ca1d1d23 | 886 | (!NILP (current_buffer->case_fold_search) |
facdc750 | 887 | ? current_buffer->case_eqv_table |
3135e9fd | 888 | : Qnil), |
b819a390 | 889 | posix); |
ca1d1d23 JB |
890 | if (np <= 0) |
891 | { | |
892 | if (NILP (noerror)) | |
893 | return signal_failure (string); | |
894 | if (!EQ (noerror, Qt)) | |
895 | { | |
896 | if (lim < BEGV || lim > ZV) | |
897 | abort (); | |
9f43ad85 | 898 | SET_PT_BOTH (lim, lim_byte); |
a5f217b8 RS |
899 | return Qnil; |
900 | #if 0 /* This would be clean, but maybe programs depend on | |
901 | a value of nil here. */ | |
481399bf | 902 | np = lim; |
a5f217b8 | 903 | #endif |
ca1d1d23 | 904 | } |
481399bf RS |
905 | else |
906 | return Qnil; | |
ca1d1d23 JB |
907 | } |
908 | ||
909 | if (np < BEGV || np > ZV) | |
910 | abort (); | |
911 | ||
912 | SET_PT (np); | |
913 | ||
914 | return make_number (np); | |
915 | } | |
916 | \f | |
fa8ed3e0 RS |
917 | /* Return 1 if REGEXP it matches just one constant string. */ |
918 | ||
b6d6a51c KH |
919 | static int |
920 | trivial_regexp_p (regexp) | |
921 | Lisp_Object regexp; | |
922 | { | |
fc932ac6 | 923 | int len = STRING_BYTES (XSTRING (regexp)); |
b6d6a51c KH |
924 | unsigned char *s = XSTRING (regexp)->data; |
925 | unsigned char c; | |
926 | while (--len >= 0) | |
927 | { | |
928 | switch (*s++) | |
929 | { | |
930 | case '.': case '*': case '+': case '?': case '[': case '^': case '$': | |
931 | return 0; | |
932 | case '\\': | |
933 | if (--len < 0) | |
934 | return 0; | |
935 | switch (*s++) | |
936 | { | |
937 | case '|': case '(': case ')': case '`': case '\'': case 'b': | |
938 | case 'B': case '<': case '>': case 'w': case 'W': case 's': | |
866f60fd | 939 | case 'S': case '=': |
5679531d | 940 | case 'c': case 'C': /* for categoryspec and notcategoryspec */ |
866f60fd | 941 | case '1': case '2': case '3': case '4': case '5': |
b6d6a51c KH |
942 | case '6': case '7': case '8': case '9': |
943 | return 0; | |
944 | } | |
945 | } | |
946 | } | |
947 | return 1; | |
948 | } | |
949 | ||
ca325161 | 950 | /* Search for the n'th occurrence of STRING in the current buffer, |
ca1d1d23 | 951 | starting at position POS and stopping at position LIM, |
b819a390 | 952 | treating STRING as a literal string if RE is false or as |
ca1d1d23 JB |
953 | a regular expression if RE is true. |
954 | ||
955 | If N is positive, searching is forward and LIM must be greater than POS. | |
956 | If N is negative, searching is backward and LIM must be less than POS. | |
957 | ||
facdc750 | 958 | Returns -x if x occurrences remain to be found (x > 0), |
ca1d1d23 | 959 | or else the position at the beginning of the Nth occurrence |
b819a390 RS |
960 | (if searching backward) or the end (if searching forward). |
961 | ||
962 | POSIX is nonzero if we want full backtracking (POSIX style) | |
963 | for this pattern. 0 means backtrack only enough to get a valid match. */ | |
ca1d1d23 | 964 | |
aff2ce94 RS |
965 | #define TRANSLATE(out, trt, d) \ |
966 | do \ | |
967 | { \ | |
968 | if (! NILP (trt)) \ | |
969 | { \ | |
970 | Lisp_Object temp; \ | |
971 | temp = Faref (trt, make_number (d)); \ | |
972 | if (INTEGERP (temp)) \ | |
973 | out = XINT (temp); \ | |
974 | else \ | |
975 | out = d; \ | |
976 | } \ | |
977 | else \ | |
978 | out = d; \ | |
979 | } \ | |
980 | while (0) | |
facdc750 | 981 | |
b819a390 | 982 | static int |
9f43ad85 RS |
983 | search_buffer (string, pos, pos_byte, lim, lim_byte, n, |
984 | RE, trt, inverse_trt, posix) | |
ca1d1d23 JB |
985 | Lisp_Object string; |
986 | int pos; | |
9f43ad85 | 987 | int pos_byte; |
ca1d1d23 | 988 | int lim; |
9f43ad85 | 989 | int lim_byte; |
ca1d1d23 JB |
990 | int n; |
991 | int RE; | |
facdc750 RS |
992 | Lisp_Object trt; |
993 | Lisp_Object inverse_trt; | |
b819a390 | 994 | int posix; |
ca1d1d23 JB |
995 | { |
996 | int len = XSTRING (string)->size; | |
fc932ac6 | 997 | int len_byte = STRING_BYTES (XSTRING (string)); |
facdc750 | 998 | register int i; |
ca1d1d23 | 999 | |
7074fde6 FP |
1000 | if (running_asynch_code) |
1001 | save_search_regs (); | |
1002 | ||
ca1d1d23 | 1003 | /* Null string is found at starting position. */ |
3f57a499 | 1004 | if (len == 0) |
ca325161 RS |
1005 | { |
1006 | set_search_regs (pos, 0); | |
1007 | return pos; | |
1008 | } | |
3f57a499 RS |
1009 | |
1010 | /* Searching 0 times means don't move. */ | |
1011 | if (n == 0) | |
ca1d1d23 JB |
1012 | return pos; |
1013 | ||
b6d6a51c | 1014 | if (RE && !trivial_regexp_p (string)) |
ca1d1d23 | 1015 | { |
facdc750 RS |
1016 | unsigned char *p1, *p2; |
1017 | int s1, s2; | |
487282dc KH |
1018 | struct re_pattern_buffer *bufp; |
1019 | ||
0c8533c6 RS |
1020 | bufp = compile_pattern (string, &search_regs, trt, posix, |
1021 | !NILP (current_buffer->enable_multibyte_characters)); | |
ca1d1d23 | 1022 | |
ca1d1d23 JB |
1023 | immediate_quit = 1; /* Quit immediately if user types ^G, |
1024 | because letting this function finish | |
1025 | can take too long. */ | |
1026 | QUIT; /* Do a pending quit right away, | |
1027 | to avoid paradoxical behavior */ | |
1028 | /* Get pointers and sizes of the two strings | |
1029 | that make up the visible portion of the buffer. */ | |
1030 | ||
1031 | p1 = BEGV_ADDR; | |
fa8ed3e0 | 1032 | s1 = GPT_BYTE - BEGV_BYTE; |
ca1d1d23 | 1033 | p2 = GAP_END_ADDR; |
fa8ed3e0 | 1034 | s2 = ZV_BYTE - GPT_BYTE; |
ca1d1d23 JB |
1035 | if (s1 < 0) |
1036 | { | |
1037 | p2 = p1; | |
fa8ed3e0 | 1038 | s2 = ZV_BYTE - BEGV_BYTE; |
ca1d1d23 JB |
1039 | s1 = 0; |
1040 | } | |
1041 | if (s2 < 0) | |
1042 | { | |
fa8ed3e0 | 1043 | s1 = ZV_BYTE - BEGV_BYTE; |
ca1d1d23 JB |
1044 | s2 = 0; |
1045 | } | |
8bb43c28 RS |
1046 | re_match_object = Qnil; |
1047 | ||
ca1d1d23 JB |
1048 | while (n < 0) |
1049 | { | |
42db823b | 1050 | int val; |
487282dc | 1051 | val = re_search_2 (bufp, (char *) p1, s1, (char *) p2, s2, |
4996330b KH |
1052 | pos_byte - BEGV_BYTE, lim_byte - pos_byte, |
1053 | &search_regs, | |
42db823b | 1054 | /* Don't allow match past current point */ |
4996330b | 1055 | pos_byte - BEGV_BYTE); |
ca1d1d23 | 1056 | if (val == -2) |
b6d6a51c KH |
1057 | { |
1058 | matcher_overflow (); | |
1059 | } | |
ca1d1d23 JB |
1060 | if (val >= 0) |
1061 | { | |
26aff150 | 1062 | pos_byte = search_regs.start[0] + BEGV_BYTE; |
4746118a | 1063 | for (i = 0; i < search_regs.num_regs; i++) |
ca1d1d23 JB |
1064 | if (search_regs.start[i] >= 0) |
1065 | { | |
fa8ed3e0 RS |
1066 | search_regs.start[i] |
1067 | = BYTE_TO_CHAR (search_regs.start[i] + BEGV_BYTE); | |
1068 | search_regs.end[i] | |
1069 | = BYTE_TO_CHAR (search_regs.end[i] + BEGV_BYTE); | |
ca1d1d23 | 1070 | } |
a3668d92 | 1071 | XSETBUFFER (last_thing_searched, current_buffer); |
ca1d1d23 JB |
1072 | /* Set pos to the new position. */ |
1073 | pos = search_regs.start[0]; | |
1074 | } | |
1075 | else | |
1076 | { | |
1077 | immediate_quit = 0; | |
1078 | return (n); | |
1079 | } | |
1080 | n++; | |
1081 | } | |
1082 | while (n > 0) | |
1083 | { | |
42db823b | 1084 | int val; |
487282dc | 1085 | val = re_search_2 (bufp, (char *) p1, s1, (char *) p2, s2, |
4996330b KH |
1086 | pos_byte - BEGV_BYTE, lim_byte - pos_byte, |
1087 | &search_regs, | |
1088 | lim_byte - BEGV_BYTE); | |
ca1d1d23 | 1089 | if (val == -2) |
b6d6a51c KH |
1090 | { |
1091 | matcher_overflow (); | |
1092 | } | |
ca1d1d23 JB |
1093 | if (val >= 0) |
1094 | { | |
26aff150 | 1095 | pos_byte = search_regs.end[0] + BEGV_BYTE; |
4746118a | 1096 | for (i = 0; i < search_regs.num_regs; i++) |
ca1d1d23 JB |
1097 | if (search_regs.start[i] >= 0) |
1098 | { | |
fa8ed3e0 RS |
1099 | search_regs.start[i] |
1100 | = BYTE_TO_CHAR (search_regs.start[i] + BEGV_BYTE); | |
1101 | search_regs.end[i] | |
1102 | = BYTE_TO_CHAR (search_regs.end[i] + BEGV_BYTE); | |
ca1d1d23 | 1103 | } |
a3668d92 | 1104 | XSETBUFFER (last_thing_searched, current_buffer); |
ca1d1d23 JB |
1105 | pos = search_regs.end[0]; |
1106 | } | |
1107 | else | |
1108 | { | |
1109 | immediate_quit = 0; | |
1110 | return (0 - n); | |
1111 | } | |
1112 | n--; | |
1113 | } | |
1114 | immediate_quit = 0; | |
1115 | return (pos); | |
1116 | } | |
1117 | else /* non-RE case */ | |
1118 | { | |
facdc750 RS |
1119 | unsigned char *raw_pattern, *pat; |
1120 | int raw_pattern_size; | |
1121 | int raw_pattern_size_byte; | |
1122 | unsigned char *patbuf; | |
1123 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); | |
1124 | unsigned char *base_pat = XSTRING (string)->data; | |
1125 | int charset_base = -1; | |
1126 | int simple = 1; | |
1127 | ||
1128 | /* MULTIBYTE says whether the text to be searched is multibyte. | |
1129 | We must convert PATTERN to match that, or we will not really | |
1130 | find things right. */ | |
1131 | ||
1132 | if (multibyte == STRING_MULTIBYTE (string)) | |
1133 | { | |
1134 | raw_pattern = (char *) XSTRING (string)->data; | |
1135 | raw_pattern_size = XSTRING (string)->size; | |
fc932ac6 | 1136 | raw_pattern_size_byte = STRING_BYTES (XSTRING (string)); |
facdc750 RS |
1137 | } |
1138 | else if (multibyte) | |
1139 | { | |
1140 | raw_pattern_size = XSTRING (string)->size; | |
1141 | raw_pattern_size_byte | |
1142 | = count_size_as_multibyte (XSTRING (string)->data, | |
1143 | raw_pattern_size); | |
1144 | raw_pattern = (char *) alloca (raw_pattern_size_byte + 1); | |
1145 | copy_text (XSTRING (string)->data, raw_pattern, | |
1146 | XSTRING (string)->size, 0, 1); | |
1147 | } | |
1148 | else | |
1149 | { | |
1150 | /* Converting multibyte to single-byte. | |
1151 | ||
1152 | ??? Perhaps this conversion should be done in a special way | |
1153 | by subtracting nonascii-insert-offset from each non-ASCII char, | |
1154 | so that only the multibyte chars which really correspond to | |
1155 | the chosen single-byte character set can possibly match. */ | |
1156 | raw_pattern_size = XSTRING (string)->size; | |
1157 | raw_pattern_size_byte = XSTRING (string)->size; | |
1158 | raw_pattern = (char *) alloca (raw_pattern_size + 1); | |
1159 | copy_text (XSTRING (string)->data, raw_pattern, | |
fc932ac6 | 1160 | STRING_BYTES (XSTRING (string)), 1, 0); |
facdc750 RS |
1161 | } |
1162 | ||
1163 | /* Copy and optionally translate the pattern. */ | |
1164 | len = raw_pattern_size; | |
1165 | len_byte = raw_pattern_size_byte; | |
1166 | patbuf = (unsigned char *) alloca (len_byte); | |
1167 | pat = patbuf; | |
1168 | base_pat = raw_pattern; | |
1169 | if (multibyte) | |
1170 | { | |
1171 | while (--len >= 0) | |
1172 | { | |
1173 | unsigned char workbuf[4], *str; | |
aff2ce94 | 1174 | int c, translated, inverse; |
facdc750 RS |
1175 | int in_charlen, charlen; |
1176 | ||
1177 | /* If we got here and the RE flag is set, it's because we're | |
1178 | dealing with a regexp known to be trivial, so the backslash | |
1179 | just quotes the next character. */ | |
1180 | if (RE && *base_pat == '\\') | |
1181 | { | |
1182 | len--; | |
1183 | len_byte--; | |
1184 | base_pat++; | |
1185 | } | |
1186 | ||
1187 | c = STRING_CHAR_AND_LENGTH (base_pat, len_byte, in_charlen); | |
1188 | /* Translate the character, if requested. */ | |
aff2ce94 | 1189 | TRANSLATE (translated, trt, c); |
facdc750 RS |
1190 | /* If translation changed the byte-length, go back |
1191 | to the original character. */ | |
1192 | charlen = CHAR_STRING (translated, workbuf, str); | |
1193 | if (in_charlen != charlen) | |
1194 | { | |
1195 | translated = c; | |
1196 | charlen = CHAR_STRING (c, workbuf, str); | |
1197 | } | |
1198 | ||
aff2ce94 RS |
1199 | TRANSLATE (inverse, inverse_trt, c); |
1200 | ||
facdc750 RS |
1201 | /* Did this char actually get translated? |
1202 | Would any other char get translated into it? */ | |
aff2ce94 | 1203 | if (translated != c || inverse != c) |
facdc750 RS |
1204 | { |
1205 | /* Keep track of which character set row | |
1206 | contains the characters that need translation. */ | |
1207 | int charset_base_code = c & ~0xff; | |
1208 | if (charset_base == -1) | |
1209 | charset_base = charset_base_code; | |
1210 | else if (charset_base != charset_base_code) | |
1211 | /* If two different rows appear, needing translation, | |
1212 | then we cannot use boyer_moore search. */ | |
1213 | simple = 0; | |
1214 | /* ??? Handa: this must do simple = 0 | |
1215 | if c is a composite character. */ | |
aff2ce94 | 1216 | } |
facdc750 RS |
1217 | |
1218 | /* Store this character into the translated pattern. */ | |
1219 | bcopy (str, pat, charlen); | |
1220 | pat += charlen; | |
1221 | base_pat += in_charlen; | |
1222 | len_byte -= in_charlen; | |
1223 | } | |
1224 | } | |
1225 | else | |
1226 | { | |
1227 | while (--len >= 0) | |
1228 | { | |
aff2ce94 | 1229 | int c, translated, inverse; |
facdc750 RS |
1230 | |
1231 | /* If we got here and the RE flag is set, it's because we're | |
1232 | dealing with a regexp known to be trivial, so the backslash | |
1233 | just quotes the next character. */ | |
1234 | if (RE && *base_pat == '\\') | |
1235 | { | |
1236 | len--; | |
1237 | base_pat++; | |
1238 | } | |
1239 | c = *base_pat++; | |
aff2ce94 RS |
1240 | TRANSLATE (translated, trt, c); |
1241 | TRANSLATE (inverse, inverse_trt, c); | |
facdc750 RS |
1242 | |
1243 | /* Did this char actually get translated? | |
1244 | Would any other char get translated into it? */ | |
aff2ce94 | 1245 | if (translated != c || inverse != c) |
facdc750 RS |
1246 | { |
1247 | /* Keep track of which character set row | |
1248 | contains the characters that need translation. */ | |
1249 | int charset_base_code = c & ~0xff; | |
1250 | if (charset_base == -1) | |
1251 | charset_base = charset_base_code; | |
1252 | else if (charset_base != charset_base_code) | |
1253 | /* If two different rows appear, needing translation, | |
1254 | then we cannot use boyer_moore search. */ | |
1255 | simple = 0; | |
aff2ce94 | 1256 | } |
facdc750 RS |
1257 | *pat++ = translated; |
1258 | } | |
1259 | } | |
1260 | ||
1261 | len_byte = pat - patbuf; | |
1262 | len = raw_pattern_size; | |
1263 | pat = base_pat = patbuf; | |
1264 | ||
1265 | if (simple) | |
1266 | return boyer_moore (n, pat, len, len_byte, trt, inverse_trt, | |
aff2ce94 RS |
1267 | pos, pos_byte, lim, lim_byte, |
1268 | charset_base); | |
facdc750 RS |
1269 | else |
1270 | return simple_search (n, pat, len, len_byte, trt, | |
1271 | pos, pos_byte, lim, lim_byte); | |
1272 | } | |
1273 | } | |
1274 | \f | |
1275 | /* Do a simple string search N times for the string PAT, | |
1276 | whose length is LEN/LEN_BYTE, | |
1277 | from buffer position POS/POS_BYTE until LIM/LIM_BYTE. | |
1278 | TRT is the translation table. | |
f8bd51c4 | 1279 | |
facdc750 RS |
1280 | Return the character position where the match is found. |
1281 | Otherwise, if M matches remained to be found, return -M. | |
f8bd51c4 | 1282 | |
facdc750 RS |
1283 | This kind of search works regardless of what is in PAT and |
1284 | regardless of what is in TRT. It is used in cases where | |
1285 | boyer_moore cannot work. */ | |
1286 | ||
1287 | static int | |
1288 | simple_search (n, pat, len, len_byte, trt, pos, pos_byte, lim, lim_byte) | |
1289 | int n; | |
1290 | unsigned char *pat; | |
1291 | int len, len_byte; | |
1292 | Lisp_Object trt; | |
1293 | int pos, pos_byte; | |
1294 | int lim, lim_byte; | |
1295 | { | |
1296 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); | |
ab228c24 | 1297 | int forward = n > 0; |
facdc750 RS |
1298 | |
1299 | if (lim > pos && multibyte) | |
1300 | while (n > 0) | |
1301 | { | |
1302 | while (1) | |
f8bd51c4 | 1303 | { |
facdc750 RS |
1304 | /* Try matching at position POS. */ |
1305 | int this_pos = pos; | |
1306 | int this_pos_byte = pos_byte; | |
1307 | int this_len = len; | |
1308 | int this_len_byte = len_byte; | |
1309 | unsigned char *p = pat; | |
1310 | if (pos + len > lim) | |
1311 | goto stop; | |
1312 | ||
1313 | while (this_len > 0) | |
1314 | { | |
1315 | int charlen, buf_charlen; | |
ab228c24 | 1316 | int pat_ch, buf_ch; |
facdc750 | 1317 | |
ab228c24 | 1318 | pat_ch = STRING_CHAR_AND_LENGTH (p, this_len_byte, charlen); |
facdc750 RS |
1319 | buf_ch = STRING_CHAR_AND_LENGTH (BYTE_POS_ADDR (this_pos_byte), |
1320 | ZV_BYTE - this_pos_byte, | |
1321 | buf_charlen); | |
aff2ce94 | 1322 | TRANSLATE (buf_ch, trt, buf_ch); |
facdc750 RS |
1323 | |
1324 | if (buf_ch != pat_ch) | |
1325 | break; | |
ab228c24 RS |
1326 | |
1327 | this_len_byte -= charlen; | |
1328 | this_len--; | |
1329 | p += charlen; | |
1330 | ||
1331 | this_pos_byte += buf_charlen; | |
1332 | this_pos++; | |
facdc750 RS |
1333 | } |
1334 | ||
1335 | if (this_len == 0) | |
1336 | { | |
1337 | pos += len; | |
1338 | pos_byte += len_byte; | |
1339 | break; | |
1340 | } | |
1341 | ||
1342 | INC_BOTH (pos, pos_byte); | |
f8bd51c4 | 1343 | } |
facdc750 RS |
1344 | |
1345 | n--; | |
1346 | } | |
1347 | else if (lim > pos) | |
1348 | while (n > 0) | |
1349 | { | |
1350 | while (1) | |
f8bd51c4 | 1351 | { |
facdc750 RS |
1352 | /* Try matching at position POS. */ |
1353 | int this_pos = pos; | |
1354 | int this_len = len; | |
1355 | unsigned char *p = pat; | |
1356 | ||
1357 | if (pos + len > lim) | |
1358 | goto stop; | |
1359 | ||
1360 | while (this_len > 0) | |
1361 | { | |
1362 | int pat_ch = *p++; | |
1363 | int buf_ch = FETCH_BYTE (this_pos); | |
aff2ce94 | 1364 | TRANSLATE (buf_ch, trt, buf_ch); |
facdc750 RS |
1365 | |
1366 | if (buf_ch != pat_ch) | |
1367 | break; | |
ab228c24 RS |
1368 | |
1369 | this_len--; | |
1370 | this_pos++; | |
facdc750 RS |
1371 | } |
1372 | ||
1373 | if (this_len == 0) | |
1374 | { | |
1375 | pos += len; | |
1376 | break; | |
1377 | } | |
1378 | ||
1379 | pos++; | |
f8bd51c4 | 1380 | } |
facdc750 RS |
1381 | |
1382 | n--; | |
1383 | } | |
1384 | /* Backwards search. */ | |
1385 | else if (lim < pos && multibyte) | |
1386 | while (n < 0) | |
1387 | { | |
1388 | while (1) | |
f8bd51c4 | 1389 | { |
facdc750 RS |
1390 | /* Try matching at position POS. */ |
1391 | int this_pos = pos - len; | |
1392 | int this_pos_byte = pos_byte - len_byte; | |
1393 | int this_len = len; | |
1394 | int this_len_byte = len_byte; | |
1395 | unsigned char *p = pat; | |
1396 | ||
1397 | if (pos - len < lim) | |
1398 | goto stop; | |
1399 | ||
1400 | while (this_len > 0) | |
1401 | { | |
1402 | int charlen, buf_charlen; | |
ab228c24 | 1403 | int pat_ch, buf_ch; |
facdc750 | 1404 | |
ab228c24 | 1405 | pat_ch = STRING_CHAR_AND_LENGTH (p, this_len_byte, charlen); |
facdc750 RS |
1406 | buf_ch = STRING_CHAR_AND_LENGTH (BYTE_POS_ADDR (this_pos_byte), |
1407 | ZV_BYTE - this_pos_byte, | |
1408 | buf_charlen); | |
aff2ce94 | 1409 | TRANSLATE (buf_ch, trt, buf_ch); |
facdc750 RS |
1410 | |
1411 | if (buf_ch != pat_ch) | |
1412 | break; | |
ab228c24 RS |
1413 | |
1414 | this_len_byte -= charlen; | |
1415 | this_len--; | |
1416 | p += charlen; | |
1417 | this_pos_byte += buf_charlen; | |
1418 | this_pos++; | |
facdc750 RS |
1419 | } |
1420 | ||
1421 | if (this_len == 0) | |
1422 | { | |
1423 | pos -= len; | |
1424 | pos_byte -= len_byte; | |
1425 | break; | |
1426 | } | |
1427 | ||
1428 | DEC_BOTH (pos, pos_byte); | |
f8bd51c4 KH |
1429 | } |
1430 | ||
facdc750 RS |
1431 | n++; |
1432 | } | |
1433 | else if (lim < pos) | |
1434 | while (n < 0) | |
1435 | { | |
1436 | while (1) | |
b6d6a51c | 1437 | { |
facdc750 RS |
1438 | /* Try matching at position POS. */ |
1439 | int this_pos = pos - len; | |
1440 | int this_len = len; | |
1441 | unsigned char *p = pat; | |
1442 | ||
1443 | if (pos - len < lim) | |
1444 | goto stop; | |
1445 | ||
1446 | while (this_len > 0) | |
1447 | { | |
1448 | int pat_ch = *p++; | |
1449 | int buf_ch = FETCH_BYTE (this_pos); | |
aff2ce94 | 1450 | TRANSLATE (buf_ch, trt, buf_ch); |
facdc750 RS |
1451 | |
1452 | if (buf_ch != pat_ch) | |
1453 | break; | |
ab228c24 RS |
1454 | this_len--; |
1455 | this_pos++; | |
facdc750 RS |
1456 | } |
1457 | ||
1458 | if (this_len == 0) | |
b6d6a51c | 1459 | { |
facdc750 RS |
1460 | pos -= len; |
1461 | break; | |
b6d6a51c | 1462 | } |
facdc750 RS |
1463 | |
1464 | pos--; | |
b6d6a51c | 1465 | } |
facdc750 RS |
1466 | |
1467 | n++; | |
b6d6a51c | 1468 | } |
facdc750 RS |
1469 | |
1470 | stop: | |
1471 | if (n == 0) | |
aff2ce94 | 1472 | { |
ab228c24 RS |
1473 | if (forward) |
1474 | set_search_regs ((multibyte ? pos_byte : pos) - len_byte, len_byte); | |
1475 | else | |
1476 | set_search_regs (multibyte ? pos_byte : pos, len_byte); | |
aff2ce94 RS |
1477 | |
1478 | return pos; | |
1479 | } | |
facdc750 RS |
1480 | else if (n > 0) |
1481 | return -n; | |
1482 | else | |
1483 | return n; | |
1484 | } | |
1485 | \f | |
1486 | /* Do Boyer-Moore search N times for the string PAT, | |
1487 | whose length is LEN/LEN_BYTE, | |
1488 | from buffer position POS/POS_BYTE until LIM/LIM_BYTE. | |
1489 | DIRECTION says which direction we search in. | |
1490 | TRT and INVERSE_TRT are translation tables. | |
1491 | ||
1492 | This kind of search works if all the characters in PAT that have | |
1493 | nontrivial translation are the same aside from the last byte. This | |
1494 | makes it possible to translate just the last byte of a character, | |
1495 | and do so after just a simple test of the context. | |
1496 | ||
1497 | If that criterion is not satisfied, do not call this function. */ | |
1498 | ||
1499 | static int | |
1500 | boyer_moore (n, base_pat, len, len_byte, trt, inverse_trt, | |
aff2ce94 | 1501 | pos, pos_byte, lim, lim_byte, charset_base) |
facdc750 RS |
1502 | int n; |
1503 | unsigned char *base_pat; | |
1504 | int len, len_byte; | |
1505 | Lisp_Object trt; | |
1506 | Lisp_Object inverse_trt; | |
1507 | int pos, pos_byte; | |
1508 | int lim, lim_byte; | |
aff2ce94 | 1509 | int charset_base; |
facdc750 RS |
1510 | { |
1511 | int direction = ((n > 0) ? 1 : -1); | |
1512 | register int dirlen; | |
1513 | int infinity, limit, k, stride_for_teases; | |
1514 | register int *BM_tab; | |
1515 | int *BM_tab_base; | |
1516 | register unsigned char *cursor, *p_limit; | |
1517 | register int i, j; | |
1518 | unsigned char *pat; | |
1519 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); | |
1520 | ||
1521 | unsigned char simple_translate[0400]; | |
1522 | int translate_prev_byte; | |
1523 | int translate_anteprev_byte; | |
1524 | ||
1525 | #ifdef C_ALLOCA | |
1526 | int BM_tab_space[0400]; | |
1527 | BM_tab = &BM_tab_space[0]; | |
1528 | #else | |
1529 | BM_tab = (int *) alloca (0400 * sizeof (int)); | |
1530 | #endif | |
1531 | /* The general approach is that we are going to maintain that we know */ | |
1532 | /* the first (closest to the present position, in whatever direction */ | |
1533 | /* we're searching) character that could possibly be the last */ | |
1534 | /* (furthest from present position) character of a valid match. We */ | |
1535 | /* advance the state of our knowledge by looking at that character */ | |
1536 | /* and seeing whether it indeed matches the last character of the */ | |
1537 | /* pattern. If it does, we take a closer look. If it does not, we */ | |
1538 | /* move our pointer (to putative last characters) as far as is */ | |
1539 | /* logically possible. This amount of movement, which I call a */ | |
1540 | /* stride, will be the length of the pattern if the actual character */ | |
1541 | /* appears nowhere in the pattern, otherwise it will be the distance */ | |
1542 | /* from the last occurrence of that character to the end of the */ | |
1543 | /* pattern. */ | |
1544 | /* As a coding trick, an enormous stride is coded into the table for */ | |
1545 | /* characters that match the last character. This allows use of only */ | |
1546 | /* a single test, a test for having gone past the end of the */ | |
1547 | /* permissible match region, to test for both possible matches (when */ | |
1548 | /* the stride goes past the end immediately) and failure to */ | |
1549 | /* match (where you get nudged past the end one stride at a time). */ | |
1550 | ||
1551 | /* Here we make a "mickey mouse" BM table. The stride of the search */ | |
1552 | /* is determined only by the last character of the putative match. */ | |
1553 | /* If that character does not match, we will stride the proper */ | |
1554 | /* distance to propose a match that superimposes it on the last */ | |
1555 | /* instance of a character that matches it (per trt), or misses */ | |
1556 | /* it entirely if there is none. */ | |
1557 | ||
1558 | dirlen = len_byte * direction; | |
1559 | infinity = dirlen - (lim_byte + pos_byte + len_byte + len_byte) * direction; | |
1560 | if (direction < 0) | |
1561 | pat = (base_pat += len_byte - 1); | |
1562 | else | |
1563 | pat = base_pat; | |
1564 | BM_tab_base = BM_tab; | |
1565 | BM_tab += 0400; | |
1566 | j = dirlen; /* to get it in a register */ | |
1567 | /* A character that does not appear in the pattern induces a */ | |
1568 | /* stride equal to the pattern length. */ | |
1569 | while (BM_tab_base != BM_tab) | |
1570 | { | |
1571 | *--BM_tab = j; | |
1572 | *--BM_tab = j; | |
1573 | *--BM_tab = j; | |
1574 | *--BM_tab = j; | |
1575 | } | |
1576 | ||
1577 | /* We use this for translation, instead of TRT itself. | |
1578 | We fill this in to handle the characters that actually | |
1579 | occur in the pattern. Others don't matter anyway! */ | |
1580 | bzero (simple_translate, sizeof simple_translate); | |
1581 | for (i = 0; i < 0400; i++) | |
1582 | simple_translate[i] = i; | |
1583 | ||
1584 | i = 0; | |
1585 | while (i != infinity) | |
1586 | { | |
1587 | unsigned char *ptr = pat + i; | |
1588 | i += direction; | |
1589 | if (i == dirlen) | |
1590 | i = infinity; | |
1591 | if (! NILP (trt)) | |
ca1d1d23 | 1592 | { |
facdc750 | 1593 | int ch; |
aff2ce94 | 1594 | int untranslated; |
facdc750 RS |
1595 | int this_translated = 1; |
1596 | ||
1597 | if (multibyte | |
1598 | && (ptr + 1 == pat + len_byte || CHAR_HEAD_P (ptr[1]))) | |
ca1d1d23 | 1599 | { |
facdc750 RS |
1600 | unsigned char *charstart = ptr; |
1601 | while (! CHAR_HEAD_P (*charstart)) | |
1602 | charstart--; | |
aff2ce94 | 1603 | untranslated = STRING_CHAR (charstart, ptr - charstart + 1); |
ab228c24 | 1604 | if (charset_base == (untranslated & ~0xff)) |
facdc750 | 1605 | { |
ab228c24 | 1606 | TRANSLATE (ch, trt, untranslated); |
aff2ce94 RS |
1607 | if (! CHAR_HEAD_P (*ptr)) |
1608 | { | |
1609 | translate_prev_byte = ptr[-1]; | |
1610 | if (! CHAR_HEAD_P (translate_prev_byte)) | |
1611 | translate_anteprev_byte = ptr[-2]; | |
1612 | } | |
facdc750 | 1613 | } |
aff2ce94 | 1614 | else |
ab228c24 RS |
1615 | { |
1616 | this_translated = 0; | |
1617 | ch = *ptr; | |
1618 | } | |
ca1d1d23 | 1619 | } |
facdc750 | 1620 | else if (!multibyte) |
aff2ce94 | 1621 | TRANSLATE (ch, trt, *ptr); |
ca1d1d23 JB |
1622 | else |
1623 | { | |
facdc750 RS |
1624 | ch = *ptr; |
1625 | this_translated = 0; | |
ca1d1d23 | 1626 | } |
facdc750 | 1627 | |
ab228c24 RS |
1628 | if (ch > 0400) |
1629 | j = ((unsigned char) ch) | 0200; | |
1630 | else | |
1631 | j = (unsigned char) ch; | |
1632 | ||
facdc750 RS |
1633 | if (i == infinity) |
1634 | stride_for_teases = BM_tab[j]; | |
ab228c24 | 1635 | |
facdc750 RS |
1636 | BM_tab[j] = dirlen - i; |
1637 | /* A translation table is accompanied by its inverse -- see */ | |
1638 | /* comment following downcase_table for details */ | |
1639 | if (this_translated) | |
ab228c24 RS |
1640 | { |
1641 | int starting_ch = ch; | |
1642 | int starting_j = j; | |
1643 | while (1) | |
1644 | { | |
1645 | TRANSLATE (ch, inverse_trt, ch); | |
1646 | if (ch > 0400) | |
1647 | j = ((unsigned char) ch) | 0200; | |
1648 | else | |
1649 | j = (unsigned char) ch; | |
1650 | ||
1651 | /* For all the characters that map into CH, | |
1652 | set up simple_translate to map the last byte | |
1653 | into STARTING_J. */ | |
1654 | simple_translate[j] = starting_j; | |
1655 | if (ch == starting_ch) | |
1656 | break; | |
1657 | BM_tab[j] = dirlen - i; | |
1658 | } | |
1659 | } | |
facdc750 RS |
1660 | } |
1661 | else | |
1662 | { | |
1663 | j = *ptr; | |
1664 | ||
1665 | if (i == infinity) | |
1666 | stride_for_teases = BM_tab[j]; | |
1667 | BM_tab[j] = dirlen - i; | |
ca1d1d23 | 1668 | } |
facdc750 RS |
1669 | /* stride_for_teases tells how much to stride if we get a */ |
1670 | /* match on the far character but are subsequently */ | |
1671 | /* disappointed, by recording what the stride would have been */ | |
1672 | /* for that character if the last character had been */ | |
1673 | /* different. */ | |
1674 | } | |
1675 | infinity = dirlen - infinity; | |
1676 | pos_byte += dirlen - ((direction > 0) ? direction : 0); | |
1677 | /* loop invariant - POS_BYTE points at where last char (first | |
1678 | char if reverse) of pattern would align in a possible match. */ | |
1679 | while (n != 0) | |
1680 | { | |
1681 | int tail_end; | |
1682 | unsigned char *tail_end_ptr; | |
1683 | ||
1684 | /* It's been reported that some (broken) compiler thinks that | |
1685 | Boolean expressions in an arithmetic context are unsigned. | |
1686 | Using an explicit ?1:0 prevents this. */ | |
1687 | if ((lim_byte - pos_byte - ((direction > 0) ? 1 : 0)) * direction | |
1688 | < 0) | |
1689 | return (n * (0 - direction)); | |
1690 | /* First we do the part we can by pointers (maybe nothing) */ | |
1691 | QUIT; | |
1692 | pat = base_pat; | |
1693 | limit = pos_byte - dirlen + direction; | |
67ce527d KH |
1694 | if (direction > 0) |
1695 | { | |
1696 | limit = BUFFER_CEILING_OF (limit); | |
1697 | /* LIMIT is now the last (not beyond-last!) value POS_BYTE | |
1698 | can take on without hitting edge of buffer or the gap. */ | |
1699 | limit = min (limit, pos_byte + 20000); | |
1700 | limit = min (limit, lim_byte - 1); | |
1701 | } | |
1702 | else | |
1703 | { | |
1704 | limit = BUFFER_FLOOR_OF (limit); | |
1705 | /* LIMIT is now the last (not beyond-last!) value POS_BYTE | |
1706 | can take on without hitting edge of buffer or the gap. */ | |
1707 | limit = max (limit, pos_byte - 20000); | |
1708 | limit = max (limit, lim_byte); | |
1709 | } | |
facdc750 RS |
1710 | tail_end = BUFFER_CEILING_OF (pos_byte) + 1; |
1711 | tail_end_ptr = BYTE_POS_ADDR (tail_end); | |
1712 | ||
1713 | if ((limit - pos_byte) * direction > 20) | |
ca1d1d23 | 1714 | { |
facdc750 RS |
1715 | unsigned char *p2; |
1716 | ||
1717 | p_limit = BYTE_POS_ADDR (limit); | |
1718 | p2 = (cursor = BYTE_POS_ADDR (pos_byte)); | |
1719 | /* In this loop, pos + cursor - p2 is the surrogate for pos */ | |
1720 | while (1) /* use one cursor setting as long as i can */ | |
ca1d1d23 | 1721 | { |
facdc750 | 1722 | if (direction > 0) /* worth duplicating */ |
ca1d1d23 | 1723 | { |
facdc750 RS |
1724 | /* Use signed comparison if appropriate |
1725 | to make cursor+infinity sure to be > p_limit. | |
1726 | Assuming that the buffer lies in a range of addresses | |
1727 | that are all "positive" (as ints) or all "negative", | |
1728 | either kind of comparison will work as long | |
1729 | as we don't step by infinity. So pick the kind | |
1730 | that works when we do step by infinity. */ | |
1731 | if ((EMACS_INT) (p_limit + infinity) > (EMACS_INT) p_limit) | |
1732 | while ((EMACS_INT) cursor <= (EMACS_INT) p_limit) | |
1733 | cursor += BM_tab[*cursor]; | |
ca1d1d23 | 1734 | else |
facdc750 RS |
1735 | while ((EMACS_UINT) cursor <= (EMACS_UINT) p_limit) |
1736 | cursor += BM_tab[*cursor]; | |
1737 | } | |
1738 | else | |
1739 | { | |
1740 | if ((EMACS_INT) (p_limit + infinity) < (EMACS_INT) p_limit) | |
1741 | while ((EMACS_INT) cursor >= (EMACS_INT) p_limit) | |
1742 | cursor += BM_tab[*cursor]; | |
1743 | else | |
1744 | while ((EMACS_UINT) cursor >= (EMACS_UINT) p_limit) | |
1745 | cursor += BM_tab[*cursor]; | |
1746 | } | |
ca1d1d23 | 1747 | /* If you are here, cursor is beyond the end of the searched region. */ |
facdc750 RS |
1748 | /* This can happen if you match on the far character of the pattern, */ |
1749 | /* because the "stride" of that character is infinity, a number able */ | |
1750 | /* to throw you well beyond the end of the search. It can also */ | |
1751 | /* happen if you fail to match within the permitted region and would */ | |
1752 | /* otherwise try a character beyond that region */ | |
1753 | if ((cursor - p_limit) * direction <= len_byte) | |
1754 | break; /* a small overrun is genuine */ | |
1755 | cursor -= infinity; /* large overrun = hit */ | |
1756 | i = dirlen - direction; | |
1757 | if (! NILP (trt)) | |
1758 | { | |
1759 | while ((i -= direction) + direction != 0) | |
ca1d1d23 | 1760 | { |
facdc750 RS |
1761 | int ch; |
1762 | cursor -= direction; | |
1763 | /* Translate only the last byte of a character. */ | |
1764 | if (! multibyte | |
1765 | || ((cursor == tail_end_ptr | |
1766 | || CHAR_HEAD_P (cursor[1])) | |
1767 | && (CHAR_HEAD_P (cursor[0]) | |
1768 | || (translate_prev_byte == cursor[-1] | |
1769 | && (CHAR_HEAD_P (translate_prev_byte) | |
1770 | || translate_anteprev_byte == cursor[-2]))))) | |
1771 | ch = simple_translate[*cursor]; | |
1772 | else | |
1773 | ch = *cursor; | |
1774 | if (pat[i] != ch) | |
1775 | break; | |
ca1d1d23 | 1776 | } |
facdc750 RS |
1777 | } |
1778 | else | |
1779 | { | |
1780 | while ((i -= direction) + direction != 0) | |
ca1d1d23 | 1781 | { |
facdc750 RS |
1782 | cursor -= direction; |
1783 | if (pat[i] != *cursor) | |
1784 | break; | |
ca1d1d23 | 1785 | } |
facdc750 RS |
1786 | } |
1787 | cursor += dirlen - i - direction; /* fix cursor */ | |
1788 | if (i + direction == 0) | |
1789 | { | |
1790 | int position; | |
0c8533c6 | 1791 | |
facdc750 | 1792 | cursor -= direction; |
1113d9db | 1793 | |
facdc750 RS |
1794 | position = pos_byte + cursor - p2 + ((direction > 0) |
1795 | ? 1 - len_byte : 0); | |
1796 | set_search_regs (position, len_byte); | |
ca325161 | 1797 | |
facdc750 RS |
1798 | if ((n -= direction) != 0) |
1799 | cursor += dirlen; /* to resume search */ | |
ca1d1d23 | 1800 | else |
facdc750 RS |
1801 | return ((direction > 0) |
1802 | ? search_regs.end[0] : search_regs.start[0]); | |
ca1d1d23 | 1803 | } |
facdc750 RS |
1804 | else |
1805 | cursor += stride_for_teases; /* <sigh> we lose - */ | |
ca1d1d23 | 1806 | } |
facdc750 RS |
1807 | pos_byte += cursor - p2; |
1808 | } | |
1809 | else | |
1810 | /* Now we'll pick up a clump that has to be done the hard */ | |
1811 | /* way because it covers a discontinuity */ | |
1812 | { | |
1813 | limit = ((direction > 0) | |
1814 | ? BUFFER_CEILING_OF (pos_byte - dirlen + 1) | |
1815 | : BUFFER_FLOOR_OF (pos_byte - dirlen - 1)); | |
1816 | limit = ((direction > 0) | |
1817 | ? min (limit + len_byte, lim_byte - 1) | |
1818 | : max (limit - len_byte, lim_byte)); | |
1819 | /* LIMIT is now the last value POS_BYTE can have | |
1820 | and still be valid for a possible match. */ | |
1821 | while (1) | |
ca1d1d23 | 1822 | { |
facdc750 RS |
1823 | /* This loop can be coded for space rather than */ |
1824 | /* speed because it will usually run only once. */ | |
1825 | /* (the reach is at most len + 21, and typically */ | |
1826 | /* does not exceed len) */ | |
1827 | while ((limit - pos_byte) * direction >= 0) | |
1828 | pos_byte += BM_tab[FETCH_BYTE (pos_byte)]; | |
1829 | /* now run the same tests to distinguish going off the */ | |
1830 | /* end, a match or a phony match. */ | |
1831 | if ((pos_byte - limit) * direction <= len_byte) | |
1832 | break; /* ran off the end */ | |
1833 | /* Found what might be a match. | |
1834 | Set POS_BYTE back to last (first if reverse) pos. */ | |
1835 | pos_byte -= infinity; | |
1836 | i = dirlen - direction; | |
1837 | while ((i -= direction) + direction != 0) | |
ca1d1d23 | 1838 | { |
facdc750 RS |
1839 | int ch; |
1840 | unsigned char *ptr; | |
1841 | pos_byte -= direction; | |
1842 | ptr = BYTE_POS_ADDR (pos_byte); | |
1843 | /* Translate only the last byte of a character. */ | |
1844 | if (! multibyte | |
1845 | || ((ptr == tail_end_ptr | |
1846 | || CHAR_HEAD_P (ptr[1])) | |
1847 | && (CHAR_HEAD_P (ptr[0]) | |
1848 | || (translate_prev_byte == ptr[-1] | |
1849 | && (CHAR_HEAD_P (translate_prev_byte) | |
1850 | || translate_anteprev_byte == ptr[-2]))))) | |
1851 | ch = simple_translate[*ptr]; | |
1852 | else | |
1853 | ch = *ptr; | |
1854 | if (pat[i] != ch) | |
1855 | break; | |
1856 | } | |
1857 | /* Above loop has moved POS_BYTE part or all the way | |
1858 | back to the first pos (last pos if reverse). | |
1859 | Set it once again at the last (first if reverse) char. */ | |
1860 | pos_byte += dirlen - i- direction; | |
1861 | if (i + direction == 0) | |
1862 | { | |
1863 | int position; | |
1864 | pos_byte -= direction; | |
1113d9db | 1865 | |
facdc750 | 1866 | position = pos_byte + ((direction > 0) ? 1 - len_byte : 0); |
0c8533c6 | 1867 | |
facdc750 | 1868 | set_search_regs (position, len_byte); |
ca325161 | 1869 | |
facdc750 RS |
1870 | if ((n -= direction) != 0) |
1871 | pos_byte += dirlen; /* to resume search */ | |
ca1d1d23 | 1872 | else |
facdc750 RS |
1873 | return ((direction > 0) |
1874 | ? search_regs.end[0] : search_regs.start[0]); | |
ca1d1d23 | 1875 | } |
facdc750 RS |
1876 | else |
1877 | pos_byte += stride_for_teases; | |
1878 | } | |
1879 | } | |
1880 | /* We have done one clump. Can we continue? */ | |
1881 | if ((lim_byte - pos_byte) * direction < 0) | |
1882 | return ((0 - n) * direction); | |
ca1d1d23 | 1883 | } |
facdc750 | 1884 | return BYTE_TO_CHAR (pos_byte); |
ca1d1d23 | 1885 | } |
ca325161 | 1886 | |
fa8ed3e0 | 1887 | /* Record beginning BEG_BYTE and end BEG_BYTE + NBYTES |
ca325161 RS |
1888 | for a match just found in the current buffer. */ |
1889 | ||
1890 | static void | |
fa8ed3e0 RS |
1891 | set_search_regs (beg_byte, nbytes) |
1892 | int beg_byte, nbytes; | |
ca325161 RS |
1893 | { |
1894 | /* Make sure we have registers in which to store | |
1895 | the match position. */ | |
1896 | if (search_regs.num_regs == 0) | |
1897 | { | |
2d4a771a RS |
1898 | search_regs.start = (regoff_t *) xmalloc (2 * sizeof (regoff_t)); |
1899 | search_regs.end = (regoff_t *) xmalloc (2 * sizeof (regoff_t)); | |
487282dc | 1900 | search_regs.num_regs = 2; |
ca325161 RS |
1901 | } |
1902 | ||
fa8ed3e0 RS |
1903 | search_regs.start[0] = BYTE_TO_CHAR (beg_byte); |
1904 | search_regs.end[0] = BYTE_TO_CHAR (beg_byte + nbytes); | |
a3668d92 | 1905 | XSETBUFFER (last_thing_searched, current_buffer); |
ca325161 | 1906 | } |
ca1d1d23 JB |
1907 | \f |
1908 | /* Given a string of words separated by word delimiters, | |
1909 | compute a regexp that matches those exact words | |
1910 | separated by arbitrary punctuation. */ | |
1911 | ||
1912 | static Lisp_Object | |
1913 | wordify (string) | |
1914 | Lisp_Object string; | |
1915 | { | |
1916 | register unsigned char *p, *o; | |
0c8533c6 | 1917 | register int i, i_byte, len, punct_count = 0, word_count = 0; |
ca1d1d23 | 1918 | Lisp_Object val; |
0c8533c6 RS |
1919 | int prev_c = 0; |
1920 | int adjust; | |
ca1d1d23 JB |
1921 | |
1922 | CHECK_STRING (string, 0); | |
1923 | p = XSTRING (string)->data; | |
1924 | len = XSTRING (string)->size; | |
1925 | ||
0c8533c6 RS |
1926 | for (i = 0, i_byte = 0; i < len; ) |
1927 | { | |
1928 | int c; | |
1929 | ||
1930 | if (STRING_MULTIBYTE (string)) | |
1931 | FETCH_STRING_CHAR_ADVANCE (c, string, i, i_byte); | |
1932 | else | |
1933 | c = XSTRING (string)->data[i++]; | |
1934 | ||
1935 | if (SYNTAX (c) != Sword) | |
1936 | { | |
1937 | punct_count++; | |
1938 | if (i > 0 && SYNTAX (prev_c) == Sword) | |
1939 | word_count++; | |
1940 | } | |
ca1d1d23 | 1941 | |
0c8533c6 RS |
1942 | prev_c = c; |
1943 | } | |
1944 | ||
1945 | if (SYNTAX (prev_c) == Sword) | |
1946 | word_count++; | |
1947 | if (!word_count) | |
1948 | return build_string (""); | |
1949 | ||
1950 | adjust = - punct_count + 5 * (word_count - 1) + 4; | |
1951 | val = make_uninit_multibyte_string (len + adjust, | |
fc932ac6 | 1952 | STRING_BYTES (XSTRING (string)) + adjust); |
ca1d1d23 JB |
1953 | |
1954 | o = XSTRING (val)->data; | |
1955 | *o++ = '\\'; | |
1956 | *o++ = 'b'; | |
1957 | ||
fc932ac6 | 1958 | for (i = 0; i < STRING_BYTES (XSTRING (val)); i++) |
ca1d1d23 JB |
1959 | if (SYNTAX (p[i]) == Sword) |
1960 | *o++ = p[i]; | |
1961 | else if (i > 0 && SYNTAX (p[i-1]) == Sword && --word_count) | |
1962 | { | |
1963 | *o++ = '\\'; | |
1964 | *o++ = 'W'; | |
1965 | *o++ = '\\'; | |
1966 | *o++ = 'W'; | |
1967 | *o++ = '*'; | |
1968 | } | |
1969 | ||
1970 | *o++ = '\\'; | |
1971 | *o++ = 'b'; | |
1972 | ||
1973 | return val; | |
1974 | } | |
1975 | \f | |
1976 | DEFUN ("search-backward", Fsearch_backward, Ssearch_backward, 1, 4, | |
6af43974 | 1977 | "MSearch backward: ", |
ca1d1d23 JB |
1978 | "Search backward from point for STRING.\n\ |
1979 | Set point to the beginning of the occurrence found, and return point.\n\ | |
1980 | An optional second argument bounds the search; it is a buffer position.\n\ | |
1981 | The match found must not extend before that position.\n\ | |
1982 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
1983 | If not nil and not t, position at limit of search and return nil.\n\ | |
1984 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
1985 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
1986 | (string, bound, noerror, count) | |
1987 | Lisp_Object string, bound, noerror, count; | |
1988 | { | |
b819a390 | 1989 | return search_command (string, bound, noerror, count, -1, 0, 0); |
ca1d1d23 JB |
1990 | } |
1991 | ||
6af43974 | 1992 | DEFUN ("search-forward", Fsearch_forward, Ssearch_forward, 1, 4, "MSearch: ", |
ca1d1d23 JB |
1993 | "Search forward from point for STRING.\n\ |
1994 | Set point to the end of the occurrence found, and return point.\n\ | |
1995 | An optional second argument bounds the search; it is a buffer position.\n\ | |
1996 | The match found must not extend after that position. nil is equivalent\n\ | |
1997 | to (point-max).\n\ | |
1998 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
1999 | If not nil and not t, move to limit of search and return nil.\n\ | |
2000 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
2001 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
2002 | (string, bound, noerror, count) | |
2003 | Lisp_Object string, bound, noerror, count; | |
2004 | { | |
b819a390 | 2005 | return search_command (string, bound, noerror, count, 1, 0, 0); |
ca1d1d23 JB |
2006 | } |
2007 | ||
2008 | DEFUN ("word-search-backward", Fword_search_backward, Sword_search_backward, 1, 4, | |
2009 | "sWord search backward: ", | |
2010 | "Search backward from point for STRING, ignoring differences in punctuation.\n\ | |
2011 | Set point to the beginning of the occurrence found, and return point.\n\ | |
2012 | An optional second argument bounds the search; it is a buffer position.\n\ | |
2013 | The match found must not extend before that position.\n\ | |
2014 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
2015 | If not nil and not t, move to limit of search and return nil.\n\ | |
2016 | Optional fourth argument is repeat count--search for successive occurrences.") | |
2017 | (string, bound, noerror, count) | |
2018 | Lisp_Object string, bound, noerror, count; | |
2019 | { | |
b819a390 | 2020 | return search_command (wordify (string), bound, noerror, count, -1, 1, 0); |
ca1d1d23 JB |
2021 | } |
2022 | ||
2023 | DEFUN ("word-search-forward", Fword_search_forward, Sword_search_forward, 1, 4, | |
2024 | "sWord search: ", | |
2025 | "Search forward from point for STRING, ignoring differences in punctuation.\n\ | |
2026 | Set point to the end of the occurrence found, and return point.\n\ | |
2027 | An optional second argument bounds the search; it is a buffer position.\n\ | |
2028 | The match found must not extend after that position.\n\ | |
2029 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
2030 | If not nil and not t, move to limit of search and return nil.\n\ | |
2031 | Optional fourth argument is repeat count--search for successive occurrences.") | |
2032 | (string, bound, noerror, count) | |
2033 | Lisp_Object string, bound, noerror, count; | |
2034 | { | |
b819a390 | 2035 | return search_command (wordify (string), bound, noerror, count, 1, 1, 0); |
ca1d1d23 JB |
2036 | } |
2037 | ||
2038 | DEFUN ("re-search-backward", Fre_search_backward, Sre_search_backward, 1, 4, | |
2039 | "sRE search backward: ", | |
2040 | "Search backward from point for match for regular expression REGEXP.\n\ | |
2041 | Set point to the beginning of the match, and return point.\n\ | |
2042 | The match found is the one starting last in the buffer\n\ | |
19c0a730 | 2043 | and yet ending before the origin of the search.\n\ |
ca1d1d23 JB |
2044 | An optional second argument bounds the search; it is a buffer position.\n\ |
2045 | The match found must start at or after that position.\n\ | |
2046 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
2047 | If not nil and not t, move to limit of search and return nil.\n\ | |
2048 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
2049 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
19c0a730 KH |
2050 | (regexp, bound, noerror, count) |
2051 | Lisp_Object regexp, bound, noerror, count; | |
ca1d1d23 | 2052 | { |
b819a390 | 2053 | return search_command (regexp, bound, noerror, count, -1, 1, 0); |
ca1d1d23 JB |
2054 | } |
2055 | ||
2056 | DEFUN ("re-search-forward", Fre_search_forward, Sre_search_forward, 1, 4, | |
2057 | "sRE search: ", | |
2058 | "Search forward from point for regular expression REGEXP.\n\ | |
2059 | Set point to the end of the occurrence found, and return point.\n\ | |
2060 | An optional second argument bounds the search; it is a buffer position.\n\ | |
2061 | The match found must not extend after that position.\n\ | |
2062 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
2063 | If not nil and not t, move to limit of search and return nil.\n\ | |
2064 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
2065 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
19c0a730 KH |
2066 | (regexp, bound, noerror, count) |
2067 | Lisp_Object regexp, bound, noerror, count; | |
ca1d1d23 | 2068 | { |
b819a390 RS |
2069 | return search_command (regexp, bound, noerror, count, 1, 1, 0); |
2070 | } | |
2071 | ||
2072 | DEFUN ("posix-search-backward", Fposix_search_backward, Sposix_search_backward, 1, 4, | |
2073 | "sPosix search backward: ", | |
2074 | "Search backward from point for match for regular expression REGEXP.\n\ | |
2075 | Find the longest match in accord with Posix regular expression rules.\n\ | |
2076 | Set point to the beginning of the match, and return point.\n\ | |
2077 | The match found is the one starting last in the buffer\n\ | |
2078 | and yet ending before the origin of the search.\n\ | |
2079 | An optional second argument bounds the search; it is a buffer position.\n\ | |
2080 | The match found must start at or after that position.\n\ | |
2081 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
2082 | If not nil and not t, move to limit of search and return nil.\n\ | |
2083 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
2084 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
2085 | (regexp, bound, noerror, count) | |
2086 | Lisp_Object regexp, bound, noerror, count; | |
2087 | { | |
2088 | return search_command (regexp, bound, noerror, count, -1, 1, 1); | |
2089 | } | |
2090 | ||
2091 | DEFUN ("posix-search-forward", Fposix_search_forward, Sposix_search_forward, 1, 4, | |
2092 | "sPosix search: ", | |
2093 | "Search forward from point for regular expression REGEXP.\n\ | |
2094 | Find the longest match in accord with Posix regular expression rules.\n\ | |
2095 | Set point to the end of the occurrence found, and return point.\n\ | |
2096 | An optional second argument bounds the search; it is a buffer position.\n\ | |
2097 | The match found must not extend after that position.\n\ | |
2098 | Optional third argument, if t, means if fail just return nil (no error).\n\ | |
2099 | If not nil and not t, move to limit of search and return nil.\n\ | |
2100 | Optional fourth argument is repeat count--search for successive occurrences.\n\ | |
2101 | See also the functions `match-beginning', `match-end' and `replace-match'.") | |
2102 | (regexp, bound, noerror, count) | |
2103 | Lisp_Object regexp, bound, noerror, count; | |
2104 | { | |
2105 | return search_command (regexp, bound, noerror, count, 1, 1, 1); | |
ca1d1d23 JB |
2106 | } |
2107 | \f | |
d7a5ad5f | 2108 | DEFUN ("replace-match", Freplace_match, Sreplace_match, 1, 5, 0, |
ca1d1d23 JB |
2109 | "Replace text matched by last search with NEWTEXT.\n\ |
2110 | If second arg FIXEDCASE is non-nil, do not alter case of replacement text.\n\ | |
5b9cf4b2 RS |
2111 | Otherwise maybe capitalize the whole text, or maybe just word initials,\n\ |
2112 | based on the replaced text.\n\ | |
2113 | If the replaced text has only capital letters\n\ | |
2114 | and has at least one multiletter word, convert NEWTEXT to all caps.\n\ | |
2115 | If the replaced text has at least one word starting with a capital letter,\n\ | |
2116 | then capitalize each word in NEWTEXT.\n\n\ | |
ca1d1d23 JB |
2117 | If third arg LITERAL is non-nil, insert NEWTEXT literally.\n\ |
2118 | Otherwise treat `\\' as special:\n\ | |
2119 | `\\&' in NEWTEXT means substitute original matched text.\n\ | |
2120 | `\\N' means substitute what matched the Nth `\\(...\\)'.\n\ | |
2121 | If Nth parens didn't match, substitute nothing.\n\ | |
2122 | `\\\\' means insert one `\\'.\n\ | |
1113d9db | 2123 | FIXEDCASE and LITERAL are optional arguments.\n\ |
080c45fd RS |
2124 | Leaves point at end of replacement text.\n\ |
2125 | \n\ | |
2126 | The optional fourth argument STRING can be a string to modify.\n\ | |
2127 | In that case, this function creates and returns a new string\n\ | |
d7a5ad5f RS |
2128 | which is made by replacing the part of STRING that was matched.\n\ |
2129 | \n\ | |
2130 | The optional fifth argument SUBEXP specifies a subexpression of the match.\n\ | |
2131 | It says to replace just that subexpression instead of the whole match.\n\ | |
2132 | This is useful only after a regular expression search or match\n\ | |
2133 | since only regular expressions have distinguished subexpressions.") | |
2134 | (newtext, fixedcase, literal, string, subexp) | |
2135 | Lisp_Object newtext, fixedcase, literal, string, subexp; | |
ca1d1d23 JB |
2136 | { |
2137 | enum { nochange, all_caps, cap_initial } case_action; | |
2138 | register int pos, last; | |
2139 | int some_multiletter_word; | |
97832bd0 | 2140 | int some_lowercase; |
73dc8771 | 2141 | int some_uppercase; |
208767c3 | 2142 | int some_nonuppercase_initial; |
ca1d1d23 JB |
2143 | register int c, prevc; |
2144 | int inslen; | |
d7a5ad5f | 2145 | int sub; |
3e18eecf | 2146 | int opoint, newpoint; |
ca1d1d23 | 2147 | |
16fdc568 | 2148 | CHECK_STRING (newtext, 0); |
ca1d1d23 | 2149 | |
080c45fd RS |
2150 | if (! NILP (string)) |
2151 | CHECK_STRING (string, 4); | |
2152 | ||
ca1d1d23 JB |
2153 | case_action = nochange; /* We tried an initialization */ |
2154 | /* but some C compilers blew it */ | |
4746118a JB |
2155 | |
2156 | if (search_regs.num_regs <= 0) | |
2157 | error ("replace-match called before any match found"); | |
2158 | ||
d7a5ad5f RS |
2159 | if (NILP (subexp)) |
2160 | sub = 0; | |
2161 | else | |
2162 | { | |
2163 | CHECK_NUMBER (subexp, 3); | |
2164 | sub = XINT (subexp); | |
2165 | if (sub < 0 || sub >= search_regs.num_regs) | |
2166 | args_out_of_range (subexp, make_number (search_regs.num_regs)); | |
2167 | } | |
2168 | ||
080c45fd RS |
2169 | if (NILP (string)) |
2170 | { | |
d7a5ad5f RS |
2171 | if (search_regs.start[sub] < BEGV |
2172 | || search_regs.start[sub] > search_regs.end[sub] | |
2173 | || search_regs.end[sub] > ZV) | |
2174 | args_out_of_range (make_number (search_regs.start[sub]), | |
2175 | make_number (search_regs.end[sub])); | |
080c45fd RS |
2176 | } |
2177 | else | |
2178 | { | |
d7a5ad5f RS |
2179 | if (search_regs.start[sub] < 0 |
2180 | || search_regs.start[sub] > search_regs.end[sub] | |
2181 | || search_regs.end[sub] > XSTRING (string)->size) | |
2182 | args_out_of_range (make_number (search_regs.start[sub]), | |
2183 | make_number (search_regs.end[sub])); | |
080c45fd | 2184 | } |
ca1d1d23 JB |
2185 | |
2186 | if (NILP (fixedcase)) | |
2187 | { | |
fa8ed3e0 | 2188 | int beg; |
ca1d1d23 JB |
2189 | /* Decide how to casify by examining the matched text. */ |
2190 | ||
fa8ed3e0 RS |
2191 | if (NILP (string)) |
2192 | last = CHAR_TO_BYTE (search_regs.end[sub]); | |
2193 | else | |
2194 | last = search_regs.end[sub]; | |
2195 | ||
2196 | if (NILP (string)) | |
2197 | beg = CHAR_TO_BYTE (search_regs.start[sub]); | |
2198 | else | |
2199 | beg = search_regs.start[sub]; | |
2200 | ||
ca1d1d23 JB |
2201 | prevc = '\n'; |
2202 | case_action = all_caps; | |
2203 | ||
2204 | /* some_multiletter_word is set nonzero if any original word | |
2205 | is more than one letter long. */ | |
2206 | some_multiletter_word = 0; | |
97832bd0 | 2207 | some_lowercase = 0; |
208767c3 | 2208 | some_nonuppercase_initial = 0; |
73dc8771 | 2209 | some_uppercase = 0; |
ca1d1d23 | 2210 | |
fa8ed3e0 | 2211 | for (pos = beg; pos < last; pos++) |
ca1d1d23 | 2212 | { |
080c45fd | 2213 | if (NILP (string)) |
5679531d | 2214 | c = FETCH_BYTE (pos); |
080c45fd RS |
2215 | else |
2216 | c = XSTRING (string)->data[pos]; | |
2217 | ||
ca1d1d23 JB |
2218 | if (LOWERCASEP (c)) |
2219 | { | |
2220 | /* Cannot be all caps if any original char is lower case */ | |
2221 | ||
97832bd0 | 2222 | some_lowercase = 1; |
ca1d1d23 | 2223 | if (SYNTAX (prevc) != Sword) |
208767c3 | 2224 | some_nonuppercase_initial = 1; |
ca1d1d23 JB |
2225 | else |
2226 | some_multiletter_word = 1; | |
2227 | } | |
2228 | else if (!NOCASEP (c)) | |
2229 | { | |
73dc8771 | 2230 | some_uppercase = 1; |
97832bd0 | 2231 | if (SYNTAX (prevc) != Sword) |
c4d460ce | 2232 | ; |
97832bd0 | 2233 | else |
ca1d1d23 JB |
2234 | some_multiletter_word = 1; |
2235 | } | |
208767c3 RS |
2236 | else |
2237 | { | |
2238 | /* If the initial is a caseless word constituent, | |
2239 | treat that like a lowercase initial. */ | |
2240 | if (SYNTAX (prevc) != Sword) | |
2241 | some_nonuppercase_initial = 1; | |
2242 | } | |
ca1d1d23 JB |
2243 | |
2244 | prevc = c; | |
2245 | } | |
2246 | ||
97832bd0 RS |
2247 | /* Convert to all caps if the old text is all caps |
2248 | and has at least one multiletter word. */ | |
2249 | if (! some_lowercase && some_multiletter_word) | |
2250 | case_action = all_caps; | |
c4d460ce | 2251 | /* Capitalize each word, if the old text has all capitalized words. */ |
208767c3 | 2252 | else if (!some_nonuppercase_initial && some_multiletter_word) |
ca1d1d23 | 2253 | case_action = cap_initial; |
208767c3 | 2254 | else if (!some_nonuppercase_initial && some_uppercase) |
73dc8771 KH |
2255 | /* Should x -> yz, operating on X, give Yz or YZ? |
2256 | We'll assume the latter. */ | |
2257 | case_action = all_caps; | |
97832bd0 RS |
2258 | else |
2259 | case_action = nochange; | |
ca1d1d23 JB |
2260 | } |
2261 | ||
080c45fd RS |
2262 | /* Do replacement in a string. */ |
2263 | if (!NILP (string)) | |
2264 | { | |
2265 | Lisp_Object before, after; | |
2266 | ||
2267 | before = Fsubstring (string, make_number (0), | |
d7a5ad5f RS |
2268 | make_number (search_regs.start[sub])); |
2269 | after = Fsubstring (string, make_number (search_regs.end[sub]), Qnil); | |
080c45fd | 2270 | |
636a5e28 RS |
2271 | /* Substitute parts of the match into NEWTEXT |
2272 | if desired. */ | |
080c45fd RS |
2273 | if (NILP (literal)) |
2274 | { | |
2275 | int lastpos = -1; | |
0c8533c6 | 2276 | int lastpos_byte = -1; |
080c45fd RS |
2277 | /* We build up the substituted string in ACCUM. */ |
2278 | Lisp_Object accum; | |
2279 | Lisp_Object middle; | |
0c8533c6 | 2280 | int pos_byte; |
080c45fd RS |
2281 | |
2282 | accum = Qnil; | |
2283 | ||
fc932ac6 | 2284 | for (pos_byte = 0, pos = 0; pos_byte < STRING_BYTES (XSTRING (newtext));) |
080c45fd RS |
2285 | { |
2286 | int substart = -1; | |
2287 | int subend; | |
1e79ec24 | 2288 | int delbackslash = 0; |
080c45fd | 2289 | |
0c8533c6 RS |
2290 | FETCH_STRING_CHAR_ADVANCE (c, newtext, pos, pos_byte); |
2291 | ||
080c45fd RS |
2292 | if (c == '\\') |
2293 | { | |
0c8533c6 | 2294 | FETCH_STRING_CHAR_ADVANCE (c, newtext, pos, pos_byte); |
080c45fd RS |
2295 | if (c == '&') |
2296 | { | |
d7a5ad5f RS |
2297 | substart = search_regs.start[sub]; |
2298 | subend = search_regs.end[sub]; | |
080c45fd RS |
2299 | } |
2300 | else if (c >= '1' && c <= '9' && c <= search_regs.num_regs + '0') | |
2301 | { | |
ad10348f | 2302 | if (search_regs.start[c - '0'] >= 0) |
080c45fd RS |
2303 | { |
2304 | substart = search_regs.start[c - '0']; | |
2305 | subend = search_regs.end[c - '0']; | |
2306 | } | |
2307 | } | |
1e79ec24 KH |
2308 | else if (c == '\\') |
2309 | delbackslash = 1; | |
636a5e28 RS |
2310 | else |
2311 | error ("Invalid use of `\\' in replacement text"); | |
080c45fd RS |
2312 | } |
2313 | if (substart >= 0) | |
2314 | { | |
2315 | if (pos - 1 != lastpos + 1) | |
0c8533c6 RS |
2316 | middle = substring_both (newtext, lastpos + 1, |
2317 | lastpos_byte + 1, | |
2318 | pos - 1, pos_byte - 1); | |
080c45fd RS |
2319 | else |
2320 | middle = Qnil; | |
2321 | accum = concat3 (accum, middle, | |
0c8533c6 RS |
2322 | Fsubstring (string, |
2323 | make_number (substart), | |
080c45fd RS |
2324 | make_number (subend))); |
2325 | lastpos = pos; | |
0c8533c6 | 2326 | lastpos_byte = pos_byte; |
080c45fd | 2327 | } |
1e79ec24 KH |
2328 | else if (delbackslash) |
2329 | { | |
0c8533c6 RS |
2330 | middle = substring_both (newtext, lastpos + 1, |
2331 | lastpos_byte + 1, | |
2332 | pos, pos_byte); | |
2333 | ||
1e79ec24 KH |
2334 | accum = concat2 (accum, middle); |
2335 | lastpos = pos; | |
0c8533c6 | 2336 | lastpos_byte = pos_byte; |
1e79ec24 | 2337 | } |
080c45fd RS |
2338 | } |
2339 | ||
2340 | if (pos != lastpos + 1) | |
0c8533c6 RS |
2341 | middle = substring_both (newtext, lastpos + 1, |
2342 | lastpos_byte + 1, | |
2343 | pos, pos_byte); | |
080c45fd RS |
2344 | else |
2345 | middle = Qnil; | |
2346 | ||
2347 | newtext = concat2 (accum, middle); | |
2348 | } | |
2349 | ||
636a5e28 | 2350 | /* Do case substitution in NEWTEXT if desired. */ |
080c45fd RS |
2351 | if (case_action == all_caps) |
2352 | newtext = Fupcase (newtext); | |
2353 | else if (case_action == cap_initial) | |
2b2eead9 | 2354 | newtext = Fupcase_initials (newtext); |
080c45fd RS |
2355 | |
2356 | return concat3 (before, newtext, after); | |
2357 | } | |
2358 | ||
b0eba991 RS |
2359 | /* Record point, the move (quietly) to the start of the match. */ |
2360 | if (PT > search_regs.start[sub]) | |
2361 | opoint = PT - ZV; | |
2362 | else | |
2363 | opoint = PT; | |
2364 | ||
fa8ed3e0 | 2365 | TEMP_SET_PT (search_regs.start[sub]); |
b0eba991 | 2366 | |
9a76659d JB |
2367 | /* We insert the replacement text before the old text, and then |
2368 | delete the original text. This means that markers at the | |
2369 | beginning or end of the original will float to the corresponding | |
2370 | position in the replacement. */ | |
ca1d1d23 | 2371 | if (!NILP (literal)) |
16fdc568 | 2372 | Finsert_and_inherit (1, &newtext); |
ca1d1d23 JB |
2373 | else |
2374 | { | |
2375 | struct gcpro gcpro1; | |
16fdc568 | 2376 | GCPRO1 (newtext); |
ca1d1d23 | 2377 | |
16fdc568 | 2378 | for (pos = 0; pos < XSTRING (newtext)->size; pos++) |
ca1d1d23 | 2379 | { |
6ec8bbd2 | 2380 | int offset = PT - search_regs.start[sub]; |
9a76659d | 2381 | |
16fdc568 | 2382 | c = XSTRING (newtext)->data[pos]; |
ca1d1d23 JB |
2383 | if (c == '\\') |
2384 | { | |
16fdc568 | 2385 | c = XSTRING (newtext)->data[++pos]; |
ca1d1d23 | 2386 | if (c == '&') |
9a76659d JB |
2387 | Finsert_buffer_substring |
2388 | (Fcurrent_buffer (), | |
d7a5ad5f RS |
2389 | make_number (search_regs.start[sub] + offset), |
2390 | make_number (search_regs.end[sub] + offset)); | |
78445046 | 2391 | else if (c >= '1' && c <= '9' && c <= search_regs.num_regs + '0') |
ca1d1d23 JB |
2392 | { |
2393 | if (search_regs.start[c - '0'] >= 1) | |
9a76659d JB |
2394 | Finsert_buffer_substring |
2395 | (Fcurrent_buffer (), | |
2396 | make_number (search_regs.start[c - '0'] + offset), | |
2397 | make_number (search_regs.end[c - '0'] + offset)); | |
ca1d1d23 | 2398 | } |
636a5e28 | 2399 | else if (c == '\\') |
ca1d1d23 | 2400 | insert_char (c); |
636a5e28 RS |
2401 | else |
2402 | error ("Invalid use of `\\' in replacement text"); | |
ca1d1d23 JB |
2403 | } |
2404 | else | |
2405 | insert_char (c); | |
2406 | } | |
2407 | UNGCPRO; | |
2408 | } | |
2409 | ||
6ec8bbd2 | 2410 | inslen = PT - (search_regs.start[sub]); |
d7a5ad5f | 2411 | del_range (search_regs.start[sub] + inslen, search_regs.end[sub] + inslen); |
ca1d1d23 JB |
2412 | |
2413 | if (case_action == all_caps) | |
6ec8bbd2 | 2414 | Fupcase_region (make_number (PT - inslen), make_number (PT)); |
ca1d1d23 | 2415 | else if (case_action == cap_initial) |
6ec8bbd2 | 2416 | Fupcase_initials_region (make_number (PT - inslen), make_number (PT)); |
b0eba991 | 2417 | |
3e18eecf RS |
2418 | newpoint = PT; |
2419 | ||
b0eba991 | 2420 | /* Put point back where it was in the text. */ |
8d808a65 | 2421 | if (opoint <= 0) |
fa8ed3e0 | 2422 | TEMP_SET_PT (opoint + ZV); |
b0eba991 | 2423 | else |
fa8ed3e0 | 2424 | TEMP_SET_PT (opoint); |
b0eba991 RS |
2425 | |
2426 | /* Now move point "officially" to the start of the inserted replacement. */ | |
3e18eecf | 2427 | move_if_not_intangible (newpoint); |
b0eba991 | 2428 | |
ca1d1d23 JB |
2429 | return Qnil; |
2430 | } | |
2431 | \f | |
2432 | static Lisp_Object | |
2433 | match_limit (num, beginningp) | |
2434 | Lisp_Object num; | |
2435 | int beginningp; | |
2436 | { | |
2437 | register int n; | |
2438 | ||
2439 | CHECK_NUMBER (num, 0); | |
2440 | n = XINT (num); | |
4746118a JB |
2441 | if (n < 0 || n >= search_regs.num_regs) |
2442 | args_out_of_range (num, make_number (search_regs.num_regs)); | |
2443 | if (search_regs.num_regs <= 0 | |
2444 | || search_regs.start[n] < 0) | |
ca1d1d23 JB |
2445 | return Qnil; |
2446 | return (make_number ((beginningp) ? search_regs.start[n] | |
2447 | : search_regs.end[n])); | |
2448 | } | |
2449 | ||
2450 | DEFUN ("match-beginning", Fmatch_beginning, Smatch_beginning, 1, 1, 0, | |
2451 | "Return position of start of text matched by last search.\n\ | |
5806161b EN |
2452 | SUBEXP, a number, specifies which parenthesized expression in the last\n\ |
2453 | regexp.\n\ | |
2454 | Value is nil if SUBEXPth pair didn't match, or there were less than\n\ | |
2455 | SUBEXP pairs.\n\ | |
ca1d1d23 | 2456 | Zero means the entire text matched by the whole regexp or whole string.") |
5806161b EN |
2457 | (subexp) |
2458 | Lisp_Object subexp; | |
ca1d1d23 | 2459 | { |
5806161b | 2460 | return match_limit (subexp, 1); |
ca1d1d23 JB |
2461 | } |
2462 | ||
2463 | DEFUN ("match-end", Fmatch_end, Smatch_end, 1, 1, 0, | |
2464 | "Return position of end of text matched by last search.\n\ | |
5806161b EN |
2465 | SUBEXP, a number, specifies which parenthesized expression in the last\n\ |
2466 | regexp.\n\ | |
2467 | Value is nil if SUBEXPth pair didn't match, or there were less than\n\ | |
2468 | SUBEXP pairs.\n\ | |
ca1d1d23 | 2469 | Zero means the entire text matched by the whole regexp or whole string.") |
5806161b EN |
2470 | (subexp) |
2471 | Lisp_Object subexp; | |
ca1d1d23 | 2472 | { |
5806161b | 2473 | return match_limit (subexp, 0); |
ca1d1d23 JB |
2474 | } |
2475 | ||
56256c2a | 2476 | DEFUN ("match-data", Fmatch_data, Smatch_data, 0, 2, 0, |
ca1d1d23 JB |
2477 | "Return a list containing all info on what the last search matched.\n\ |
2478 | Element 2N is `(match-beginning N)'; element 2N + 1 is `(match-end N)'.\n\ | |
2479 | All the elements are markers or nil (nil if the Nth pair didn't match)\n\ | |
2480 | if the last match was on a buffer; integers or nil if a string was matched.\n\ | |
56256c2a RS |
2481 | Use `store-match-data' to reinstate the data in this list.\n\ |
2482 | \n\ | |
2483 | If INTEGERS (the optional first argument) is non-nil, always use integers\n\ | |
8ca821e9 | 2484 | \(rather than markers) to represent buffer positions.\n\ |
56256c2a RS |
2485 | If REUSE is a list, reuse it as part of the value. If REUSE is long enough\n\ |
2486 | to hold all the values, and if INTEGERS is non-nil, no consing is done.") | |
2487 | (integers, reuse) | |
2488 | Lisp_Object integers, reuse; | |
ca1d1d23 | 2489 | { |
56256c2a | 2490 | Lisp_Object tail, prev; |
4746118a | 2491 | Lisp_Object *data; |
ca1d1d23 JB |
2492 | int i, len; |
2493 | ||
daa37602 | 2494 | if (NILP (last_thing_searched)) |
c36bcf1b | 2495 | return Qnil; |
daa37602 | 2496 | |
4746118a JB |
2497 | data = (Lisp_Object *) alloca ((2 * search_regs.num_regs) |
2498 | * sizeof (Lisp_Object)); | |
2499 | ||
ca1d1d23 | 2500 | len = -1; |
4746118a | 2501 | for (i = 0; i < search_regs.num_regs; i++) |
ca1d1d23 JB |
2502 | { |
2503 | int start = search_regs.start[i]; | |
2504 | if (start >= 0) | |
2505 | { | |
56256c2a RS |
2506 | if (EQ (last_thing_searched, Qt) |
2507 | || ! NILP (integers)) | |
ca1d1d23 | 2508 | { |
c235cce7 KH |
2509 | XSETFASTINT (data[2 * i], start); |
2510 | XSETFASTINT (data[2 * i + 1], search_regs.end[i]); | |
ca1d1d23 | 2511 | } |
0ed62dc7 | 2512 | else if (BUFFERP (last_thing_searched)) |
ca1d1d23 JB |
2513 | { |
2514 | data[2 * i] = Fmake_marker (); | |
daa37602 JB |
2515 | Fset_marker (data[2 * i], |
2516 | make_number (start), | |
2517 | last_thing_searched); | |
ca1d1d23 JB |
2518 | data[2 * i + 1] = Fmake_marker (); |
2519 | Fset_marker (data[2 * i + 1], | |
daa37602 JB |
2520 | make_number (search_regs.end[i]), |
2521 | last_thing_searched); | |
ca1d1d23 | 2522 | } |
daa37602 JB |
2523 | else |
2524 | /* last_thing_searched must always be Qt, a buffer, or Qnil. */ | |
2525 | abort (); | |
2526 | ||
ca1d1d23 JB |
2527 | len = i; |
2528 | } | |
2529 | else | |
2530 | data[2 * i] = data [2 * i + 1] = Qnil; | |
2531 | } | |
56256c2a RS |
2532 | |
2533 | /* If REUSE is not usable, cons up the values and return them. */ | |
2534 | if (! CONSP (reuse)) | |
2535 | return Flist (2 * len + 2, data); | |
2536 | ||
2537 | /* If REUSE is a list, store as many value elements as will fit | |
2538 | into the elements of REUSE. */ | |
2539 | for (i = 0, tail = reuse; CONSP (tail); | |
2540 | i++, tail = XCONS (tail)->cdr) | |
2541 | { | |
2542 | if (i < 2 * len + 2) | |
2543 | XCONS (tail)->car = data[i]; | |
2544 | else | |
2545 | XCONS (tail)->car = Qnil; | |
2546 | prev = tail; | |
2547 | } | |
2548 | ||
2549 | /* If we couldn't fit all value elements into REUSE, | |
2550 | cons up the rest of them and add them to the end of REUSE. */ | |
2551 | if (i < 2 * len + 2) | |
2552 | XCONS (prev)->cdr = Flist (2 * len + 2 - i, data + i); | |
2553 | ||
2554 | return reuse; | |
ca1d1d23 JB |
2555 | } |
2556 | ||
2557 | ||
3f1c005b | 2558 | DEFUN ("set-match-data", Fset_match_data, Sset_match_data, 1, 1, 0, |
ca1d1d23 JB |
2559 | "Set internal data on last search match from elements of LIST.\n\ |
2560 | LIST should have been created by calling `match-data' previously.") | |
2561 | (list) | |
2562 | register Lisp_Object list; | |
2563 | { | |
2564 | register int i; | |
2565 | register Lisp_Object marker; | |
2566 | ||
7074fde6 FP |
2567 | if (running_asynch_code) |
2568 | save_search_regs (); | |
2569 | ||
ca1d1d23 | 2570 | if (!CONSP (list) && !NILP (list)) |
b37902c8 | 2571 | list = wrong_type_argument (Qconsp, list); |
ca1d1d23 | 2572 | |
daa37602 JB |
2573 | /* Unless we find a marker with a buffer in LIST, assume that this |
2574 | match data came from a string. */ | |
2575 | last_thing_searched = Qt; | |
2576 | ||
4746118a JB |
2577 | /* Allocate registers if they don't already exist. */ |
2578 | { | |
d084e942 | 2579 | int length = XFASTINT (Flength (list)) / 2; |
4746118a JB |
2580 | |
2581 | if (length > search_regs.num_regs) | |
2582 | { | |
1113d9db JB |
2583 | if (search_regs.num_regs == 0) |
2584 | { | |
2585 | search_regs.start | |
2586 | = (regoff_t *) xmalloc (length * sizeof (regoff_t)); | |
2587 | search_regs.end | |
2588 | = (regoff_t *) xmalloc (length * sizeof (regoff_t)); | |
2589 | } | |
4746118a | 2590 | else |
1113d9db JB |
2591 | { |
2592 | search_regs.start | |
2593 | = (regoff_t *) xrealloc (search_regs.start, | |
2594 | length * sizeof (regoff_t)); | |
2595 | search_regs.end | |
2596 | = (regoff_t *) xrealloc (search_regs.end, | |
2597 | length * sizeof (regoff_t)); | |
2598 | } | |
4746118a | 2599 | |
487282dc | 2600 | search_regs.num_regs = length; |
4746118a JB |
2601 | } |
2602 | } | |
2603 | ||
2604 | for (i = 0; i < search_regs.num_regs; i++) | |
ca1d1d23 JB |
2605 | { |
2606 | marker = Fcar (list); | |
2607 | if (NILP (marker)) | |
2608 | { | |
2609 | search_regs.start[i] = -1; | |
2610 | list = Fcdr (list); | |
2611 | } | |
2612 | else | |
2613 | { | |
0ed62dc7 | 2614 | if (MARKERP (marker)) |
daa37602 JB |
2615 | { |
2616 | if (XMARKER (marker)->buffer == 0) | |
c235cce7 | 2617 | XSETFASTINT (marker, 0); |
daa37602 | 2618 | else |
a3668d92 | 2619 | XSETBUFFER (last_thing_searched, XMARKER (marker)->buffer); |
daa37602 | 2620 | } |
ca1d1d23 JB |
2621 | |
2622 | CHECK_NUMBER_COERCE_MARKER (marker, 0); | |
2623 | search_regs.start[i] = XINT (marker); | |
2624 | list = Fcdr (list); | |
2625 | ||
2626 | marker = Fcar (list); | |
0ed62dc7 | 2627 | if (MARKERP (marker) && XMARKER (marker)->buffer == 0) |
c235cce7 | 2628 | XSETFASTINT (marker, 0); |
ca1d1d23 JB |
2629 | |
2630 | CHECK_NUMBER_COERCE_MARKER (marker, 0); | |
2631 | search_regs.end[i] = XINT (marker); | |
2632 | } | |
2633 | list = Fcdr (list); | |
2634 | } | |
2635 | ||
2636 | return Qnil; | |
2637 | } | |
2638 | ||
7074fde6 FP |
2639 | /* If non-zero the match data have been saved in saved_search_regs |
2640 | during the execution of a sentinel or filter. */ | |
75ebf74b | 2641 | static int search_regs_saved; |
7074fde6 FP |
2642 | static struct re_registers saved_search_regs; |
2643 | ||
2644 | /* Called from Flooking_at, Fstring_match, search_buffer, Fstore_match_data | |
2645 | if asynchronous code (filter or sentinel) is running. */ | |
2646 | static void | |
2647 | save_search_regs () | |
2648 | { | |
2649 | if (!search_regs_saved) | |
2650 | { | |
2651 | saved_search_regs.num_regs = search_regs.num_regs; | |
2652 | saved_search_regs.start = search_regs.start; | |
2653 | saved_search_regs.end = search_regs.end; | |
2654 | search_regs.num_regs = 0; | |
2d4a771a RS |
2655 | search_regs.start = 0; |
2656 | search_regs.end = 0; | |
7074fde6 FP |
2657 | |
2658 | search_regs_saved = 1; | |
2659 | } | |
2660 | } | |
2661 | ||
2662 | /* Called upon exit from filters and sentinels. */ | |
2663 | void | |
2664 | restore_match_data () | |
2665 | { | |
2666 | if (search_regs_saved) | |
2667 | { | |
2668 | if (search_regs.num_regs > 0) | |
2669 | { | |
2670 | xfree (search_regs.start); | |
2671 | xfree (search_regs.end); | |
2672 | } | |
2673 | search_regs.num_regs = saved_search_regs.num_regs; | |
2674 | search_regs.start = saved_search_regs.start; | |
2675 | search_regs.end = saved_search_regs.end; | |
2676 | ||
2677 | search_regs_saved = 0; | |
2678 | } | |
2679 | } | |
2680 | ||
ca1d1d23 JB |
2681 | /* Quote a string to inactivate reg-expr chars */ |
2682 | ||
2683 | DEFUN ("regexp-quote", Fregexp_quote, Sregexp_quote, 1, 1, 0, | |
2684 | "Return a regexp string which matches exactly STRING and nothing else.") | |
5806161b EN |
2685 | (string) |
2686 | Lisp_Object string; | |
ca1d1d23 JB |
2687 | { |
2688 | register unsigned char *in, *out, *end; | |
2689 | register unsigned char *temp; | |
0c8533c6 | 2690 | int backslashes_added = 0; |
ca1d1d23 | 2691 | |
5806161b | 2692 | CHECK_STRING (string, 0); |
ca1d1d23 | 2693 | |
fc932ac6 | 2694 | temp = (unsigned char *) alloca (STRING_BYTES (XSTRING (string)) * 2); |
ca1d1d23 JB |
2695 | |
2696 | /* Now copy the data into the new string, inserting escapes. */ | |
2697 | ||
5806161b | 2698 | in = XSTRING (string)->data; |
fc932ac6 | 2699 | end = in + STRING_BYTES (XSTRING (string)); |
ca1d1d23 JB |
2700 | out = temp; |
2701 | ||
2702 | for (; in != end; in++) | |
2703 | { | |
2704 | if (*in == '[' || *in == ']' | |
2705 | || *in == '*' || *in == '.' || *in == '\\' | |
2706 | || *in == '?' || *in == '+' | |
2707 | || *in == '^' || *in == '$') | |
0c8533c6 | 2708 | *out++ = '\\', backslashes_added++; |
ca1d1d23 JB |
2709 | *out++ = *in; |
2710 | } | |
2711 | ||
3f8100f1 | 2712 | return make_specified_string (temp, |
0c8533c6 | 2713 | XSTRING (string)->size + backslashes_added, |
3f8100f1 RS |
2714 | out - temp, |
2715 | STRING_MULTIBYTE (string)); | |
ca1d1d23 JB |
2716 | } |
2717 | \f | |
2718 | syms_of_search () | |
2719 | { | |
2720 | register int i; | |
2721 | ||
487282dc KH |
2722 | for (i = 0; i < REGEXP_CACHE_SIZE; ++i) |
2723 | { | |
2724 | searchbufs[i].buf.allocated = 100; | |
2725 | searchbufs[i].buf.buffer = (unsigned char *) malloc (100); | |
2726 | searchbufs[i].buf.fastmap = searchbufs[i].fastmap; | |
2727 | searchbufs[i].regexp = Qnil; | |
2728 | staticpro (&searchbufs[i].regexp); | |
2729 | searchbufs[i].next = (i == REGEXP_CACHE_SIZE-1 ? 0 : &searchbufs[i+1]); | |
2730 | } | |
2731 | searchbuf_head = &searchbufs[0]; | |
ca1d1d23 JB |
2732 | |
2733 | Qsearch_failed = intern ("search-failed"); | |
2734 | staticpro (&Qsearch_failed); | |
2735 | Qinvalid_regexp = intern ("invalid-regexp"); | |
2736 | staticpro (&Qinvalid_regexp); | |
2737 | ||
2738 | Fput (Qsearch_failed, Qerror_conditions, | |
2739 | Fcons (Qsearch_failed, Fcons (Qerror, Qnil))); | |
2740 | Fput (Qsearch_failed, Qerror_message, | |
2741 | build_string ("Search failed")); | |
2742 | ||
2743 | Fput (Qinvalid_regexp, Qerror_conditions, | |
2744 | Fcons (Qinvalid_regexp, Fcons (Qerror, Qnil))); | |
2745 | Fput (Qinvalid_regexp, Qerror_message, | |
2746 | build_string ("Invalid regexp")); | |
2747 | ||
daa37602 JB |
2748 | last_thing_searched = Qnil; |
2749 | staticpro (&last_thing_searched); | |
2750 | ||
ca1d1d23 | 2751 | defsubr (&Slooking_at); |
b819a390 RS |
2752 | defsubr (&Sposix_looking_at); |
2753 | defsubr (&Sstring_match); | |
2754 | defsubr (&Sposix_string_match); | |
ca1d1d23 JB |
2755 | defsubr (&Ssearch_forward); |
2756 | defsubr (&Ssearch_backward); | |
2757 | defsubr (&Sword_search_forward); | |
2758 | defsubr (&Sword_search_backward); | |
2759 | defsubr (&Sre_search_forward); | |
2760 | defsubr (&Sre_search_backward); | |
b819a390 RS |
2761 | defsubr (&Sposix_search_forward); |
2762 | defsubr (&Sposix_search_backward); | |
ca1d1d23 JB |
2763 | defsubr (&Sreplace_match); |
2764 | defsubr (&Smatch_beginning); | |
2765 | defsubr (&Smatch_end); | |
2766 | defsubr (&Smatch_data); | |
3f1c005b | 2767 | defsubr (&Sset_match_data); |
ca1d1d23 JB |
2768 | defsubr (&Sregexp_quote); |
2769 | } |