Mercurial > hg > xemacs-beta
annotate src/search.c @ 5159:cb303ff63e76
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| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Fri, 19 Mar 2010 17:02:11 -0500 |
| parents | 99f8ebc082d9 |
| children | 308d34e9f07d |
| rev | line source |
|---|---|
| 428 | 1 /* String search routines for XEmacs. |
| 2 Copyright (C) 1985, 1986, 1987, 1992-1995 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
| 5041 | 4 Copyright (C) 2001, 2002, 2010 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
| 8 XEmacs is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 10 Free Software Foundation; either version 2, or (at your option) any | |
| 11 later version. | |
| 12 | |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with XEmacs; see the file COPYING. If not, write to | |
| 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 Boston, MA 02111-1307, USA. */ | |
| 22 | |
| 23 /* Synched up with: FSF 19.29, except for region-cache stuff. */ | |
| 24 | |
| 25 /* Hacked on for Mule by Ben Wing, December 1994 and August 1995. */ | |
| 26 | |
| 826 | 27 /* This file has been Mule-ized. */ |
| 428 | 28 |
| 29 #include <config.h> | |
| 30 #include "lisp.h" | |
| 31 | |
| 32 #include "buffer.h" | |
| 33 #include "insdel.h" | |
| 34 #include "opaque.h" | |
| 35 #ifdef REGION_CACHE_NEEDS_WORK | |
| 36 #include "region-cache.h" | |
| 37 #endif | |
| 38 #include "syntax.h" | |
| 39 | |
| 40 #include <sys/types.h> | |
| 41 #include "regex.h" | |
| 446 | 42 #include "casetab.h" |
| 43 #include "chartab.h" | |
| 44 | |
| 45 #define TRANSLATE(table, pos) \ | |
| 867 | 46 (!NILP (table) ? TRT_TABLE_OF (table, (Ichar) pos) : pos) |
| 428 | 47 |
| 48 #define REGEXP_CACHE_SIZE 20 | |
| 49 | |
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50 #ifdef DEBUG_XEMACS |
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51 |
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52 /* Used in tests/automated/case-tests.el if available. */ |
| 5041 | 53 Fixnum debug_searches; |
| 54 | |
| 55 /* Declare as int rather than Bitflags because it's used by regex.c, which | |
| 56 may be used outside of XEmacs (e.g. etags.c). */ | |
| 57 int debug_regexps; | |
| 58 Lisp_Object Vdebug_regexps; | |
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59 |
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60 Lisp_Object Qsearch_algorithm_used, Qboyer_moore, Qsimple_search; |
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61 |
| 5041 | 62 Lisp_Object Qcompilation, Qfailure_point, Qmatching; |
| 63 | |
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64 #endif |
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65 |
| 428 | 66 /* If the regexp is non-nil, then the buffer contains the compiled form |
| 67 of that regexp, suitable for searching. */ | |
| 446 | 68 struct regexp_cache |
| 69 { | |
| 428 | 70 struct regexp_cache *next; |
| 71 Lisp_Object regexp; | |
| 72 struct re_pattern_buffer buf; | |
| 73 char fastmap[0400]; | |
| 74 /* Nonzero means regexp was compiled to do full POSIX backtracking. */ | |
| 75 char posix; | |
| 76 }; | |
| 77 | |
| 78 /* The instances of that struct. */ | |
| 79 static struct regexp_cache searchbufs[REGEXP_CACHE_SIZE]; | |
| 80 | |
| 81 /* The head of the linked list; points to the most recently used buffer. */ | |
| 82 static struct regexp_cache *searchbuf_head; | |
| 83 | |
| 84 | |
| 85 /* Every call to re_match, etc., must pass &search_regs as the regs | |
| 86 argument unless you can show it is unnecessary (i.e., if re_match | |
| 87 is certainly going to be called again before region-around-match | |
| 88 can be called). | |
| 89 | |
| 90 Since the registers are now dynamically allocated, we need to make | |
| 91 sure not to refer to the Nth register before checking that it has | |
| 92 been allocated by checking search_regs.num_regs. | |
| 93 | |
| 94 The regex code keeps track of whether it has allocated the search | |
| 95 buffer using bits in the re_pattern_buffer. This means that whenever | |
| 96 you compile a new pattern, it completely forgets whether it has | |
| 97 allocated any registers, and will allocate new registers the next | |
| 98 time you call a searching or matching function. Therefore, we need | |
| 99 to call re_set_registers after compiling a new pattern or after | |
| 100 setting the match registers, so that the regex functions will be | |
| 101 able to free or re-allocate it properly. */ | |
| 102 | |
| 103 /* Note: things get trickier under Mule because the values returned from | |
| 826 | 104 the regexp routines are in Bytebpos's but we need them to be in Charbpos's. |
| 428 | 105 We take the easy way out for the moment and just convert them immediately. |
| 106 We could be more clever by not converting them until necessary, but | |
| 107 that gets real ugly real fast since the buffer might have changed and | |
| 108 the positions might be out of sync or out of range. | |
| 109 */ | |
| 110 static struct re_registers search_regs; | |
| 111 | |
| 1468 | 112 /* Every function that sets the match data _must_ clear unused search |
| 113 registers on success. An unsuccessful search or match _must_ preserve | |
| 114 the search registers. The traditional documentation implied that | |
| 115 any match operation might trash the registers, but in fact failures | |
| 116 have always preserved the match data (in GNU Emacs as well). Some | |
| 117 plausible code depends on this behavior (cf. `w3-configuration-data' | |
| 118 in library "w3-cfg"). | |
| 119 | |
| 120 Ordinary string searchs use set_search_regs to set the whole-string | |
| 121 match. That function takes care of clearing the unused subexpression | |
| 1425 | 122 registers. |
| 123 */ | |
| 124 static void set_search_regs (struct buffer *buf, Charbpos beg, Charcount len); | |
| 1468 | 125 static void clear_search_regs (void); |
| 1425 | 126 |
| 428 | 127 /* The buffer in which the last search was performed, or |
| 128 Qt if the last search was done in a string; | |
| 129 Qnil if no searching has been done yet. */ | |
| 130 static Lisp_Object last_thing_searched; | |
| 131 | |
| 132 /* error condition signalled when regexp compile_pattern fails */ | |
| 133 | |
| 134 Lisp_Object Qinvalid_regexp; | |
| 135 | |
| 136 /* Regular expressions used in forward/backward-word */ | |
| 137 Lisp_Object Vforward_word_regexp, Vbackward_word_regexp; | |
| 138 | |
| 507 | 139 Fixnum warn_about_possibly_incompatible_back_references; |
| 502 | 140 |
| 428 | 141 /* range table for use with skip_chars. Only needed for Mule. */ |
| 142 Lisp_Object Vskip_chars_range_table; | |
| 143 | |
| 867 | 144 static Charbpos simple_search (struct buffer *buf, Ibyte *base_pat, |
| 826 | 145 Bytecount len, Bytebpos pos, Bytebpos lim, |
| 146 EMACS_INT n, Lisp_Object trt); | |
| 867 | 147 static Charbpos boyer_moore (struct buffer *buf, Ibyte *base_pat, |
| 826 | 148 Bytecount len, Bytebpos pos, Bytebpos lim, |
| 149 EMACS_INT n, Lisp_Object trt, | |
| 150 Lisp_Object inverse_trt, int charset_base); | |
| 665 | 151 static Charbpos search_buffer (struct buffer *buf, Lisp_Object str, |
| 826 | 152 Charbpos charbpos, Charbpos buflim, EMACS_INT n, |
| 153 int RE, Lisp_Object trt, | |
| 154 Lisp_Object inverse_trt, int posix); | |
| 771 | 155 |
| 2268 | 156 static DECLARE_DOESNT_RETURN (matcher_overflow (void)); |
| 157 | |
| 158 static DOESNT_RETURN | |
| 159 matcher_overflow () | |
| 428 | 160 { |
| 563 | 161 stack_overflow ("Stack overflow in regexp matcher", Qunbound); |
| 428 | 162 } |
| 163 | |
| 164 /* Compile a regexp and signal a Lisp error if anything goes wrong. | |
| 165 PATTERN is the pattern to compile. | |
| 166 CP is the place to put the result. | |
| 826 | 167 TRANSLATE is a translation table for ignoring case, or Qnil for none. |
| 428 | 168 REGP is the structure that says where to store the "register" |
| 169 values that will result from matching this pattern. | |
| 170 If it is 0, we should compile the pattern not to record any | |
| 171 subexpression bounds. | |
| 172 POSIX is nonzero if we want full backtracking (POSIX style) | |
| 173 for this pattern. 0 means backtrack only enough to get a valid match. */ | |
| 174 | |
| 175 static int | |
| 176 compile_pattern_1 (struct regexp_cache *cp, Lisp_Object pattern, | |
| 2286 | 177 struct re_registers *UNUSED (regp), Lisp_Object translate, |
| 826 | 178 int posix, Error_Behavior errb) |
| 428 | 179 { |
| 442 | 180 const char *val; |
| 428 | 181 reg_syntax_t old; |
| 182 | |
| 183 cp->regexp = Qnil; | |
| 184 cp->buf.translate = translate; | |
| 185 cp->posix = posix; | |
| 186 old = re_set_syntax (RE_SYNTAX_EMACS | |
| 187 | (posix ? 0 : RE_NO_POSIX_BACKTRACKING)); | |
| 442 | 188 val = (const char *) |
| 428 | 189 re_compile_pattern ((char *) XSTRING_DATA (pattern), |
| 190 XSTRING_LENGTH (pattern), &cp->buf); | |
| 191 re_set_syntax (old); | |
| 192 if (val) | |
| 193 { | |
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194 maybe_signal_error (Qinvalid_regexp, 0, build_cistring (val), |
| 428 | 195 Qsearch, errb); |
| 196 return 0; | |
| 197 } | |
| 198 | |
| 199 cp->regexp = Fcopy_sequence (pattern); | |
| 200 return 1; | |
| 201 } | |
| 202 | |
| 203 /* Compile a regexp if necessary, but first check to see if there's one in | |
| 204 the cache. | |
| 205 PATTERN is the pattern to compile. | |
| 826 | 206 TRANSLATE is a translation table for ignoring case, or Qnil for none. |
| 428 | 207 REGP is the structure that says where to store the "register" |
| 208 values that will result from matching this pattern. | |
| 209 If it is 0, we should compile the pattern not to record any | |
| 210 subexpression bounds. | |
| 211 POSIX is nonzero if we want full backtracking (POSIX style) | |
| 212 for this pattern. 0 means backtrack only enough to get a valid match. */ | |
| 213 | |
| 214 struct re_pattern_buffer * | |
| 215 compile_pattern (Lisp_Object pattern, struct re_registers *regp, | |
| 2286 | 216 Lisp_Object translate, Lisp_Object UNUSED (searchobj), |
| 217 struct buffer *UNUSED (searchbuf), int posix, | |
| 218 Error_Behavior errb) | |
| 428 | 219 { |
| 220 struct regexp_cache *cp, **cpp; | |
| 221 | |
| 222 for (cpp = &searchbuf_head; ; cpp = &cp->next) | |
| 223 { | |
| 224 cp = *cpp; | |
| 826 | 225 /* &&#### once we fix up the fastmap code in regex.c for 8-bit-fixed, |
| 226 we need to record and compare the buffer and format, since the | |
| 227 fastmap will reflect the state of the buffer -- and things get | |
| 228 more complicated if the buffer has changed formats or (esp.) has | |
| 229 kept the format but changed its interpretation! may need to have | |
| 230 the code that changes the interpretation go through and invalidate | |
| 231 cache entries for that buffer. */ | |
| 428 | 232 if (!NILP (Fstring_equal (cp->regexp, pattern)) |
| 446 | 233 && EQ (cp->buf.translate, translate) |
| 428 | 234 && cp->posix == posix) |
| 235 break; | |
| 236 | |
| 237 /* If we're at the end of the cache, compile into the last cell. */ | |
| 238 if (cp->next == 0) | |
| 239 { | |
| 826 | 240 if (!compile_pattern_1 (cp, pattern, regp, translate, |
| 241 posix, errb)) | |
| 428 | 242 return 0; |
| 243 break; | |
| 244 } | |
| 245 } | |
| 246 | |
| 247 /* When we get here, cp (aka *cpp) contains the compiled pattern, | |
| 248 either because we found it in the cache or because we just compiled it. | |
| 249 Move it to the front of the queue to mark it as most recently used. */ | |
| 250 *cpp = cp->next; | |
| 251 cp->next = searchbuf_head; | |
| 252 searchbuf_head = cp; | |
| 253 | |
| 254 /* Advise the searching functions about the space we have allocated | |
| 255 for register data. */ | |
| 256 if (regp) | |
| 257 re_set_registers (&cp->buf, regp, regp->num_regs, regp->start, regp->end); | |
| 258 | |
| 259 return &cp->buf; | |
| 260 } | |
| 261 | |
| 262 /* Error condition used for failing searches */ | |
| 263 Lisp_Object Qsearch_failed; | |
| 264 | |
| 2268 | 265 static DECLARE_DOESNT_RETURN (signal_failure (Lisp_Object)); |
| 266 | |
| 267 static DOESNT_RETURN | |
| 428 | 268 signal_failure (Lisp_Object arg) |
| 269 { | |
| 446 | 270 for (;;) |
| 271 Fsignal (Qsearch_failed, list1 (arg)); | |
| 428 | 272 } |
| 273 | |
| 826 | 274 /* Convert the search registers from Bytebpos's to Charbpos's. Needs to be |
| 428 | 275 done after each regexp match that uses the search regs. |
| 276 | |
| 277 We could get a potential speedup by not converting the search registers | |
| 278 until it's really necessary, e.g. when match-data or replace-match is | |
| 279 called. However, this complexifies the code a lot (e.g. the buffer | |
| 826 | 280 could have changed and the Bytebpos's stored might be invalid) and is |
| 428 | 281 probably not a great time-saver. */ |
| 282 | |
| 283 static void | |
| 284 fixup_search_regs_for_buffer (struct buffer *buf) | |
| 285 { | |
| 286 int i; | |
| 287 int num_regs = search_regs.num_regs; | |
| 288 | |
| 289 for (i = 0; i < num_regs; i++) | |
| 290 { | |
| 291 if (search_regs.start[i] >= 0) | |
| 826 | 292 search_regs.start[i] = bytebpos_to_charbpos (buf, |
| 293 search_regs.start[i]); | |
| 428 | 294 if (search_regs.end[i] >= 0) |
| 665 | 295 search_regs.end[i] = bytebpos_to_charbpos (buf, search_regs.end[i]); |
| 428 | 296 } |
| 297 } | |
| 298 | |
| 299 /* Similar but for strings. */ | |
| 300 static void | |
| 301 fixup_search_regs_for_string (Lisp_Object string) | |
| 302 { | |
| 303 int i; | |
| 304 int num_regs = search_regs.num_regs; | |
| 305 | |
| 306 /* #### bytecount_to_charcount() is not that efficient. This function | |
| 867 | 307 could be faster if it did its own conversion (using INC_IBYTEPTR() |
| 428 | 308 and such), because the register ends are likely to be somewhat ordered. |
| 309 (Even if not, you could sort them.) | |
| 310 | |
| 311 Think about this if this function is a time hog, which it's probably | |
| 312 not. */ | |
| 313 for (i = 0; i < num_regs; i++) | |
| 314 { | |
| 315 if (search_regs.start[i] > 0) | |
| 316 { | |
| 317 search_regs.start[i] = | |
| 793 | 318 string_index_byte_to_char (string, search_regs.start[i]); |
| 428 | 319 } |
| 320 if (search_regs.end[i] > 0) | |
| 321 { | |
| 322 search_regs.end[i] = | |
| 793 | 323 string_index_byte_to_char (string, search_regs.end[i]); |
| 428 | 324 } |
| 325 } | |
| 326 } | |
| 327 | |
| 328 | |
| 329 static Lisp_Object | |
| 330 looking_at_1 (Lisp_Object string, struct buffer *buf, int posix) | |
| 331 { | |
| 332 Lisp_Object val; | |
| 665 | 333 Bytebpos p1, p2; |
| 428 | 334 Bytecount s1, s2; |
| 335 REGISTER int i; | |
| 336 struct re_pattern_buffer *bufp; | |
| 826 | 337 struct syntax_cache scache_struct; |
| 338 struct syntax_cache *scache = &scache_struct; | |
| 339 | |
| 428 | 340 CHECK_STRING (string); |
| 341 bufp = compile_pattern (string, &search_regs, | |
| 342 (!NILP (buf->case_fold_search) | |
| 446 | 343 ? XCASE_TABLE_DOWNCASE (buf->case_table) : Qnil), |
| 826 | 344 wrap_buffer (buf), buf, posix, ERROR_ME); |
| 428 | 345 |
| 346 QUIT; | |
| 347 | |
| 348 /* Get pointers and sizes of the two strings | |
| 349 that make up the visible portion of the buffer. */ | |
| 350 | |
| 826 | 351 p1 = BYTE_BUF_BEGV (buf); |
| 352 p2 = BYTE_BUF_CEILING_OF (buf, p1); | |
| 428 | 353 s1 = p2 - p1; |
| 826 | 354 s2 = BYTE_BUF_ZV (buf) - p2; |
| 355 | |
| 356 /* By making the regex object, regex buffer, and syntax cache arguments | |
| 357 to re_{search,match}{,_2}, we've removed the need to do nasty things | |
| 358 to deal with regex reentrancy. (See stack trace in signal.c for proof | |
| 359 that this can happen.) | |
| 360 | |
| 361 #### there is still a potential problem with the regex cache -- | |
| 362 the compiled regex could be overwritten. we'd need 20-fold | |
| 363 reentrancy, though. Fix this. */ | |
| 364 | |
| 365 i = re_match_2 (bufp, (char *) BYTE_BUF_BYTE_ADDRESS (buf, p1), | |
| 366 s1, (char *) BYTE_BUF_BYTE_ADDRESS (buf, p2), s2, | |
| 367 BYTE_BUF_PT (buf) - BYTE_BUF_BEGV (buf), &search_regs, | |
| 368 BYTE_BUF_ZV (buf) - BYTE_BUF_BEGV (buf), wrap_buffer (buf), | |
| 369 buf, scache); | |
| 428 | 370 |
| 371 if (i == -2) | |
| 372 matcher_overflow (); | |
| 373 | |
| 374 val = (0 <= i ? Qt : Qnil); | |
| 375 if (NILP (val)) | |
| 826 | 376 return Qnil; |
| 428 | 377 { |
| 378 int num_regs = search_regs.num_regs; | |
| 379 for (i = 0; i < num_regs; i++) | |
| 380 if (search_regs.start[i] >= 0) | |
| 381 { | |
| 826 | 382 search_regs.start[i] += BYTE_BUF_BEGV (buf); |
| 383 search_regs.end[i] += BYTE_BUF_BEGV (buf); | |
| 428 | 384 } |
| 385 } | |
| 793 | 386 last_thing_searched = wrap_buffer (buf); |
| 428 | 387 fixup_search_regs_for_buffer (buf); |
| 826 | 388 return val; |
| 428 | 389 } |
| 390 | |
| 391 DEFUN ("looking-at", Flooking_at, 1, 2, 0, /* | |
| 392 Return t if text after point matches regular expression REGEXP. | |
| 1468 | 393 When the match is successful, this function modifies the match data |
| 394 that `match-beginning', `match-end' and `match-data' access; save the | |
| 395 match data with `match-data' and restore it with `store-match-data' if | |
| 396 you want to preserve them. If the match fails, the match data from the | |
| 397 previous success match is preserved. | |
| 428 | 398 |
| 399 Optional argument BUFFER defaults to the current buffer. | |
| 400 */ | |
| 401 (regexp, buffer)) | |
| 402 { | |
| 403 return looking_at_1 (regexp, decode_buffer (buffer, 0), 0); | |
| 404 } | |
| 405 | |
| 406 DEFUN ("posix-looking-at", Fposix_looking_at, 1, 2, 0, /* | |
| 407 Return t if text after point matches regular expression REGEXP. | |
| 408 Find the longest match, in accord with Posix regular expression rules. | |
| 1468 | 409 When the match is successful, this function modifies the match data |
| 410 that `match-beginning', `match-end' and `match-data' access; save the | |
| 411 match data with `match-data' and restore it with `store-match-data' if | |
| 412 you want to preserve them. If the match fails, the match data from the | |
| 413 previous success match is preserved. | |
| 428 | 414 |
| 415 Optional argument BUFFER defaults to the current buffer. | |
| 416 */ | |
| 417 (regexp, buffer)) | |
| 418 { | |
| 826 | 419 return looking_at_1 (regexp, decode_buffer (buffer, 0), 1); |
| 428 | 420 } |
| 421 | |
| 422 static Lisp_Object | |
| 423 string_match_1 (Lisp_Object regexp, Lisp_Object string, Lisp_Object start, | |
| 2286 | 424 struct buffer *buf, int UNUSED (posix)) |
| 428 | 425 { |
| 426 Bytecount val; | |
| 427 Charcount s; | |
| 428 struct re_pattern_buffer *bufp; | |
| 429 | |
| 853 | 430 /* Some FSF junk with running_asynch_code, to preserve the match |
| 431 data. Not necessary because we don't call process filters | |
| 432 asynchronously (i.e. from within QUIT). */ | |
| 428 | 433 |
| 434 CHECK_STRING (regexp); | |
| 435 CHECK_STRING (string); | |
| 436 | |
| 437 if (NILP (start)) | |
| 438 s = 0; | |
| 439 else | |
| 440 { | |
| 826 | 441 Charcount len = string_char_length (string); |
| 428 | 442 |
| 443 CHECK_INT (start); | |
| 444 s = XINT (start); | |
| 445 if (s < 0 && -s <= len) | |
| 446 s = len + s; | |
| 447 else if (0 > s || s > len) | |
| 448 args_out_of_range (string, start); | |
| 449 } | |
| 450 | |
| 451 | |
| 452 bufp = compile_pattern (regexp, &search_regs, | |
| 453 (!NILP (buf->case_fold_search) | |
| 446 | 454 ? XCASE_TABLE_DOWNCASE (buf->case_table) : Qnil), |
| 826 | 455 string, buf, 0, ERROR_ME); |
| 428 | 456 QUIT; |
| 457 { | |
| 793 | 458 Bytecount bis = string_index_char_to_byte (string, s); |
| 826 | 459 struct syntax_cache scache_struct; |
| 460 struct syntax_cache *scache = &scache_struct; | |
| 461 | |
| 462 /* By making the regex object, regex buffer, and syntax cache arguments | |
| 463 to re_{search,match}{,_2}, we've removed the need to do nasty things | |
| 464 to deal with regex reentrancy. (See stack trace in signal.c for proof | |
| 465 that this can happen.) | |
| 466 | |
| 467 #### there is still a potential problem with the regex cache -- | |
| 468 the compiled regex could be overwritten. we'd need 20-fold | |
| 469 reentrancy, though. Fix this. */ | |
| 470 | |
| 428 | 471 val = re_search (bufp, (char *) XSTRING_DATA (string), |
| 472 XSTRING_LENGTH (string), bis, | |
| 473 XSTRING_LENGTH (string) - bis, | |
| 826 | 474 &search_regs, string, buf, scache); |
| 428 | 475 } |
| 476 if (val == -2) | |
| 477 matcher_overflow (); | |
| 826 | 478 if (val < 0) return Qnil; |
| 428 | 479 last_thing_searched = Qt; |
| 480 fixup_search_regs_for_string (string); | |
| 826 | 481 return make_int (string_index_byte_to_char (string, val)); |
| 428 | 482 } |
| 483 | |
| 484 DEFUN ("string-match", Fstring_match, 2, 4, 0, /* | |
| 485 Return index of start of first match for REGEXP in STRING, or nil. | |
| 486 If third arg START is non-nil, start search at that index in STRING. | |
| 487 For index of first char beyond the match, do (match-end 0). | |
| 488 `match-end' and `match-beginning' also give indices of substrings | |
| 489 matched by parenthesis constructs in the pattern. | |
| 490 | |
| 826 | 491 Optional arg BUFFER controls how case folding and syntax and category |
| 492 lookup is done (according to the value of `case-fold-search' in that buffer | |
| 493 and that buffer's case tables, syntax tables, and category table). If nil | |
| 494 or unspecified, it defaults *NOT* to the current buffer but instead: | |
| 495 | |
| 496 -- the value of `case-fold-search' in the current buffer is still respected | |
| 497 because of idioms like | |
| 498 | |
| 499 (let ((case-fold-search nil)) | |
| 500 (string-match "^foo.*bar" string)) | |
| 501 | |
| 502 but the case, syntax, and category tables come from the standard tables, | |
| 1468 | 503 which are accessed through functions `default-{case,syntax,category}-table' |
| 504 and serve as the parents of the tables in particular buffer. | |
| 505 | |
| 506 When the match is successful, this function modifies the match data | |
| 507 that `match-beginning', `match-end' and `match-data' access; save the | |
| 508 match data with `match-data' and restore it with `store-match-data' if | |
| 509 you want to preserve them. If the match fails, the match data from the | |
| 510 previous success match is preserved. | |
| 428 | 511 */ |
| 512 (regexp, string, start, buffer)) | |
| 513 { | |
| 826 | 514 /* &&#### implement new interp for buffer arg; check code to see if it |
| 515 makes more sense than prev */ | |
| 428 | 516 return string_match_1 (regexp, string, start, decode_buffer (buffer, 0), 0); |
| 517 } | |
| 518 | |
| 519 DEFUN ("posix-string-match", Fposix_string_match, 2, 4, 0, /* | |
| 520 Return index of start of first match for REGEXP in STRING, or nil. | |
| 521 Find the longest match, in accord with Posix regular expression rules. | |
| 522 If third arg START is non-nil, start search at that index in STRING. | |
| 523 For index of first char beyond the match, do (match-end 0). | |
| 524 `match-end' and `match-beginning' also give indices of substrings | |
| 525 matched by parenthesis constructs in the pattern. | |
| 526 | |
| 527 Optional arg BUFFER controls how case folding is done (according to | |
| 528 the value of `case-fold-search' in that buffer and that buffer's case | |
| 529 tables) and defaults to the current buffer. | |
| 1468 | 530 |
| 531 When the match is successful, this function modifies the match data | |
| 532 that `match-beginning', `match-end' and `match-data' access; save the | |
| 533 match data with `match-data' and restore it with `store-match-data' if | |
| 534 you want to preserve them. If the match fails, the match data from the | |
| 535 previous success match is preserved. | |
| 428 | 536 */ |
| 537 (regexp, string, start, buffer)) | |
| 538 { | |
| 539 return string_match_1 (regexp, string, start, decode_buffer (buffer, 0), 1); | |
| 540 } | |
| 541 | |
| 542 /* Match REGEXP against STRING, searching all of STRING, | |
| 543 and return the index of the match, or negative on failure. | |
| 544 This does not clobber the match data. */ | |
| 545 | |
| 546 Bytecount | |
| 1347 | 547 fast_string_match (Lisp_Object regexp, const Ibyte *nonreloc, |
| 428 | 548 Lisp_Object reloc, Bytecount offset, |
| 549 Bytecount length, int case_fold_search, | |
| 578 | 550 Error_Behavior errb, int no_quit) |
| 428 | 551 { |
| 552 Bytecount val; | |
| 867 | 553 Ibyte *newnonreloc = (Ibyte *) nonreloc; |
| 428 | 554 struct re_pattern_buffer *bufp; |
| 826 | 555 struct syntax_cache scache_struct; |
| 556 struct syntax_cache *scache = &scache_struct; | |
| 428 | 557 |
| 558 bufp = compile_pattern (regexp, 0, | |
| 559 (case_fold_search | |
| 771 | 560 ? XCASE_TABLE_DOWNCASE (Vstandard_case_table) |
| 446 | 561 : Qnil), |
| 826 | 562 reloc, 0, 0, errb); |
| 428 | 563 if (!bufp) |
| 564 return -1; /* will only do this when errb != ERROR_ME */ | |
| 565 if (!no_quit) | |
| 566 QUIT; | |
| 567 else | |
| 568 no_quit_in_re_search = 1; | |
| 569 | |
| 570 fixup_internal_substring (nonreloc, reloc, offset, &length); | |
| 571 | |
| 771 | 572 /* Don't need to protect against GC inside of re_search() due to QUIT; |
| 573 QUIT is GC-inhibited. */ | |
| 428 | 574 if (!NILP (reloc)) |
| 771 | 575 newnonreloc = XSTRING_DATA (reloc); |
| 576 | |
| 826 | 577 /* By making the regex object, regex buffer, and syntax cache arguments |
| 578 to re_{search,match}{,_2}, we've removed the need to do nasty things | |
| 579 to deal with regex reentrancy. (See stack trace in signal.c for proof | |
| 580 that this can happen.) | |
| 581 | |
| 582 #### there is still a potential problem with the regex cache -- | |
| 583 the compiled regex could be overwritten. we'd need 20-fold | |
| 584 reentrancy, though. Fix this. */ | |
| 585 | |
| 428 | 586 val = re_search (bufp, (char *) newnonreloc + offset, length, 0, |
| 826 | 587 length, 0, reloc, 0, scache); |
| 428 | 588 |
| 589 no_quit_in_re_search = 0; | |
| 590 return val; | |
| 591 } | |
| 592 | |
| 593 Bytecount | |
| 594 fast_lisp_string_match (Lisp_Object regex, Lisp_Object string) | |
| 595 { | |
| 596 return fast_string_match (regex, 0, string, 0, -1, 0, ERROR_ME, 0); | |
| 597 } | |
| 598 | |
| 599 | |
| 600 #ifdef REGION_CACHE_NEEDS_WORK | |
| 601 /* The newline cache: remembering which sections of text have no newlines. */ | |
| 602 | |
| 603 /* If the user has requested newline caching, make sure it's on. | |
| 604 Otherwise, make sure it's off. | |
| 605 This is our cheezy way of associating an action with the change of | |
| 606 state of a buffer-local variable. */ | |
| 607 static void | |
| 608 newline_cache_on_off (struct buffer *buf) | |
| 609 { | |
| 610 if (NILP (buf->cache_long_line_scans)) | |
| 611 { | |
| 612 /* It should be off. */ | |
| 613 if (buf->newline_cache) | |
| 614 { | |
| 615 free_region_cache (buf->newline_cache); | |
| 616 buf->newline_cache = 0; | |
| 617 } | |
| 618 } | |
| 619 else | |
| 620 { | |
| 621 /* It should be on. */ | |
| 622 if (buf->newline_cache == 0) | |
| 623 buf->newline_cache = new_region_cache (); | |
| 624 } | |
| 625 } | |
| 626 #endif | |
| 627 | |
| 628 /* Search in BUF for COUNT instances of the character TARGET between | |
| 629 START and END. | |
| 630 | |
| 631 If COUNT is positive, search forwards; END must be >= START. | |
| 632 If COUNT is negative, search backwards for the -COUNTth instance; | |
| 633 END must be <= START. | |
| 634 If COUNT is zero, do anything you please; run rogue, for all I care. | |
| 635 | |
| 636 If END is zero, use BEGV or ZV instead, as appropriate for the | |
| 637 direction indicated by COUNT. | |
| 638 | |
| 639 If we find COUNT instances, set *SHORTAGE to zero, and return the | |
| 640 position after the COUNTth match. Note that for reverse motion | |
| 641 this is not the same as the usual convention for Emacs motion commands. | |
| 642 | |
| 643 If we don't find COUNT instances before reaching END, set *SHORTAGE | |
| 644 to the number of TARGETs left unfound, and return END. | |
| 645 | |
| 646 If ALLOW_QUIT is non-zero, call QUIT periodically. */ | |
| 647 | |
| 665 | 648 static Bytebpos |
| 867 | 649 byte_scan_buffer (struct buffer *buf, Ichar target, Bytebpos st, Bytebpos en, |
| 872 | 650 EMACS_INT count, EMACS_INT *shortage, int allow_quit) |
| 428 | 651 { |
| 665 | 652 Bytebpos lim = en > 0 ? en : |
| 826 | 653 ((count > 0) ? BYTE_BUF_ZV (buf) : BYTE_BUF_BEGV (buf)); |
| 428 | 654 |
| 655 /* #### newline cache stuff in this function not yet ported */ | |
| 656 assert (count != 0); | |
| 657 | |
| 658 if (shortage) | |
| 659 *shortage = 0; | |
| 660 | |
| 661 if (count > 0) | |
| 662 { | |
| 663 #ifdef MULE | |
| 826 | 664 Internal_Format fmt = buf->text->format; |
| 665 /* Check for char that's unrepresentable in the buffer -- it | |
| 666 certainly can't be there. */ | |
| 867 | 667 if (!ichar_fits_in_format (target, fmt, wrap_buffer (buf))) |
| 428 | 668 { |
| 826 | 669 *shortage = count; |
| 670 return lim; | |
| 671 } | |
| 672 /* Due to the Mule representation of characters in a buffer, we can | |
| 673 simply search for characters in the range 0 - 127 directly; for | |
| 674 8-bit-fixed, we can do this for all characters. In other cases, | |
| 675 we do it the "hard" way. Note that this way works for all | |
| 676 characters and all formats, but the other way is faster. */ | |
| 677 else if (! (fmt == FORMAT_8_BIT_FIXED || | |
| 867 | 678 (fmt == FORMAT_DEFAULT && ichar_ascii_p (target)))) |
| 826 | 679 { |
| 867 | 680 Raw_Ichar raw = ichar_to_raw (target, fmt, wrap_buffer (buf)); |
| 428 | 681 while (st < lim && count > 0) |
| 682 { | |
| 826 | 683 if (BYTE_BUF_FETCH_CHAR_RAW (buf, st) == raw) |
| 428 | 684 count--; |
| 665 | 685 INC_BYTEBPOS (buf, st); |
| 428 | 686 } |
| 687 } | |
| 688 else | |
| 689 #endif | |
| 690 { | |
| 867 | 691 Raw_Ichar raw = ichar_to_raw (target, fmt, wrap_buffer (buf)); |
| 428 | 692 while (st < lim && count > 0) |
| 693 { | |
| 665 | 694 Bytebpos ceil; |
| 867 | 695 Ibyte *bufptr; |
| 428 | 696 |
| 826 | 697 ceil = BYTE_BUF_CEILING_OF (buf, st); |
| 428 | 698 ceil = min (lim, ceil); |
| 867 | 699 bufptr = (Ibyte *) memchr (BYTE_BUF_BYTE_ADDRESS (buf, st), |
| 826 | 700 raw, ceil - st); |
| 428 | 701 if (bufptr) |
| 702 { | |
| 703 count--; | |
| 826 | 704 st = BYTE_BUF_PTR_BYTE_POS (buf, bufptr) + 1; |
| 428 | 705 } |
| 706 else | |
| 707 st = ceil; | |
| 708 } | |
| 709 } | |
| 710 | |
| 711 if (shortage) | |
| 712 *shortage = count; | |
| 713 if (allow_quit) | |
| 714 QUIT; | |
| 715 return st; | |
| 716 } | |
| 717 else | |
| 718 { | |
| 719 #ifdef MULE | |
| 826 | 720 Internal_Format fmt = buf->text->format; |
| 721 /* Check for char that's unrepresentable in the buffer -- it | |
| 722 certainly can't be there. */ | |
| 867 | 723 if (!ichar_fits_in_format (target, fmt, wrap_buffer (buf))) |
| 428 | 724 { |
| 826 | 725 *shortage = -count; |
| 726 return lim; | |
| 727 } | |
| 728 else if (! (fmt == FORMAT_8_BIT_FIXED || | |
| 867 | 729 (fmt == FORMAT_DEFAULT && ichar_ascii_p (target)))) |
| 826 | 730 { |
| 867 | 731 Raw_Ichar raw = ichar_to_raw (target, fmt, wrap_buffer (buf)); |
| 428 | 732 while (st > lim && count < 0) |
| 733 { | |
| 665 | 734 DEC_BYTEBPOS (buf, st); |
| 826 | 735 if (BYTE_BUF_FETCH_CHAR_RAW (buf, st) == raw) |
| 428 | 736 count++; |
| 737 } | |
| 738 } | |
| 739 else | |
| 740 #endif | |
| 741 { | |
| 867 | 742 Raw_Ichar raw = ichar_to_raw (target, fmt, wrap_buffer (buf)); |
| 428 | 743 while (st > lim && count < 0) |
| 744 { | |
| 665 | 745 Bytebpos floor; |
| 867 | 746 Ibyte *bufptr; |
| 747 Ibyte *floorptr; | |
| 428 | 748 |
| 826 | 749 floor = BYTE_BUF_FLOOR_OF (buf, st); |
| 428 | 750 floor = max (lim, floor); |
| 751 /* No memrchr() ... */ | |
| 826 | 752 bufptr = BYTE_BUF_BYTE_ADDRESS_BEFORE (buf, st); |
| 753 floorptr = BYTE_BUF_BYTE_ADDRESS (buf, floor); | |
| 428 | 754 while (bufptr >= floorptr) |
| 755 { | |
| 756 st--; | |
| 757 /* At this point, both ST and BUFPTR refer to the same | |
| 758 character. When the loop terminates, ST will | |
| 759 always point to the last character we tried. */ | |
| 867 | 760 if (*bufptr == (Ibyte) raw) |
| 428 | 761 { |
| 762 count++; | |
| 763 break; | |
| 764 } | |
| 765 bufptr--; | |
| 766 } | |
| 767 } | |
| 768 } | |
| 769 | |
| 770 if (shortage) | |
| 771 *shortage = -count; | |
| 772 if (allow_quit) | |
| 773 QUIT; | |
| 774 if (count) | |
| 775 return st; | |
| 776 else | |
| 777 { | |
| 778 /* We found the character we were looking for; we have to return | |
| 779 the position *after* it due to the strange way that the return | |
| 780 value is defined. */ | |
| 665 | 781 INC_BYTEBPOS (buf, st); |
| 428 | 782 return st; |
| 783 } | |
| 784 } | |
| 785 } | |
| 786 | |
| 665 | 787 Charbpos |
| 867 | 788 scan_buffer (struct buffer *buf, Ichar target, Charbpos start, Charbpos end, |
| 428 | 789 EMACS_INT count, EMACS_INT *shortage, int allow_quit) |
| 790 { | |
| 826 | 791 Bytebpos byte_retval; |
| 792 Bytebpos byte_start, byte_end; | |
| 793 | |
| 794 byte_start = charbpos_to_bytebpos (buf, start); | |
| 428 | 795 if (end) |
| 826 | 796 byte_end = charbpos_to_bytebpos (buf, end); |
| 428 | 797 else |
| 826 | 798 byte_end = 0; |
| 799 byte_retval = byte_scan_buffer (buf, target, byte_start, byte_end, count, | |
| 428 | 800 shortage, allow_quit); |
| 826 | 801 return bytebpos_to_charbpos (buf, byte_retval); |
| 428 | 802 } |
| 803 | |
| 665 | 804 Bytebpos |
| 826 | 805 byte_find_next_newline_no_quit (struct buffer *buf, Bytebpos from, int count) |
| 428 | 806 { |
| 826 | 807 return byte_scan_buffer (buf, '\n', from, 0, count, 0, 0); |
| 428 | 808 } |
| 809 | |
| 665 | 810 Charbpos |
| 811 find_next_newline_no_quit (struct buffer *buf, Charbpos from, int count) | |
| 428 | 812 { |
| 813 return scan_buffer (buf, '\n', from, 0, count, 0, 0); | |
| 814 } | |
| 815 | |
| 665 | 816 Charbpos |
| 817 find_next_newline (struct buffer *buf, Charbpos from, int count) | |
| 428 | 818 { |
| 819 return scan_buffer (buf, '\n', from, 0, count, 0, 1); | |
| 820 } | |
| 821 | |
| 826 | 822 Bytecount |
| 867 | 823 byte_find_next_ichar_in_string (Lisp_Object str, Ichar target, Bytecount st, |
| 428 | 824 EMACS_INT count) |
| 825 { | |
| 793 | 826 Bytebpos lim = XSTRING_LENGTH (str) -1; |
| 867 | 827 Ibyte *s = XSTRING_DATA (str); |
| 428 | 828 |
| 829 assert (count >= 0); | |
| 830 | |
| 831 #ifdef MULE | |
| 832 /* Due to the Mule representation of characters in a buffer, | |
| 833 we can simply search for characters in the range 0 - 127 | |
| 834 directly. For other characters, we do it the "hard" way. | |
| 835 Note that this way works for all characters but the other | |
| 836 way is faster. */ | |
| 837 if (target >= 0200) | |
| 838 { | |
| 839 while (st < lim && count > 0) | |
| 840 { | |
| 867 | 841 if (string_ichar (str, st) == target) |
| 428 | 842 count--; |
| 826 | 843 INC_BYTECOUNT (s, st); |
| 428 | 844 } |
| 845 } | |
| 846 else | |
| 847 #endif | |
| 848 { | |
| 849 while (st < lim && count > 0) | |
| 850 { | |
| 867 | 851 Ibyte *bufptr = (Ibyte *) memchr (itext_n_addr (s, st), |
| 428 | 852 (int) target, lim - st); |
| 853 if (bufptr) | |
| 854 { | |
| 855 count--; | |
| 826 | 856 st = (Bytebpos) (bufptr - s) + 1; |
| 428 | 857 } |
| 858 else | |
| 859 st = lim; | |
| 860 } | |
| 861 } | |
| 862 return st; | |
| 863 } | |
| 864 | |
| 865 /* Like find_next_newline, but returns position before the newline, | |
| 866 not after, and only search up to TO. This isn't just | |
| 867 find_next_newline (...)-1, because you might hit TO. */ | |
| 665 | 868 Charbpos |
| 826 | 869 find_before_next_newline (struct buffer *buf, Charbpos from, Charbpos to, |
| 870 int count) | |
| 428 | 871 { |
| 872 EMACS_INT shortage; | |
| 665 | 873 Charbpos pos = scan_buffer (buf, '\n', from, to, count, &shortage, 1); |
| 428 | 874 |
| 875 if (shortage == 0) | |
| 876 pos--; | |
| 877 | |
| 878 return pos; | |
| 879 } | |
| 880 | |
| 872 | 881 /* This function synched with FSF 21.1 */ |
| 428 | 882 static Lisp_Object |
| 883 skip_chars (struct buffer *buf, int forwardp, int syntaxp, | |
| 884 Lisp_Object string, Lisp_Object lim) | |
| 885 { | |
| 867 | 886 REGISTER Ibyte *p, *pend; |
| 887 REGISTER Ichar c; | |
| 428 | 888 /* We store the first 256 chars in an array here and the rest in |
| 889 a range table. */ | |
| 890 unsigned char fastmap[0400]; | |
| 891 int negate = 0; | |
| 892 REGISTER int i; | |
| 665 | 893 Charbpos limit; |
| 826 | 894 struct syntax_cache *scache; |
| 895 | |
| 428 | 896 if (NILP (lim)) |
| 897 limit = forwardp ? BUF_ZV (buf) : BUF_BEGV (buf); | |
| 898 else | |
| 899 { | |
| 900 CHECK_INT_COERCE_MARKER (lim); | |
| 901 limit = XINT (lim); | |
| 902 | |
| 903 /* In any case, don't allow scan outside bounds of buffer. */ | |
| 904 if (limit > BUF_ZV (buf)) limit = BUF_ZV (buf); | |
| 905 if (limit < BUF_BEGV (buf)) limit = BUF_BEGV (buf); | |
| 906 } | |
| 907 | |
| 908 CHECK_STRING (string); | |
| 909 p = XSTRING_DATA (string); | |
| 910 pend = p + XSTRING_LENGTH (string); | |
| 911 memset (fastmap, 0, sizeof (fastmap)); | |
| 912 | |
| 913 Fclear_range_table (Vskip_chars_range_table); | |
| 914 | |
| 915 if (p != pend && *p == '^') | |
| 916 { | |
| 917 negate = 1; | |
| 918 p++; | |
| 919 } | |
| 920 | |
| 921 /* Find the characters specified and set their elements of fastmap. | |
| 922 If syntaxp, each character counts as itself. | |
| 923 Otherwise, handle backslashes and ranges specially */ | |
| 924 | |
| 925 while (p != pend) | |
| 926 { | |
| 867 | 927 c = itext_ichar (p); |
| 928 INC_IBYTEPTR (p); | |
| 428 | 929 if (syntaxp) |
| 930 { | |
| 931 if (c < 0400 && syntax_spec_code[c] < (unsigned char) Smax) | |
| 932 fastmap[c] = 1; | |
| 933 else | |
| 831 | 934 invalid_argument ("Invalid syntax designator", make_char (c)); |
| 428 | 935 } |
| 936 else | |
| 937 { | |
| 938 if (c == '\\') | |
| 939 { | |
| 940 if (p == pend) break; | |
| 867 | 941 c = itext_ichar (p); |
| 942 INC_IBYTEPTR (p); | |
| 428 | 943 } |
| 944 if (p != pend && *p == '-') | |
| 945 { | |
| 867 | 946 Ichar cend; |
| 428 | 947 |
| 872 | 948 /* Skip over the dash. */ |
| 428 | 949 p++; |
| 950 if (p == pend) break; | |
| 867 | 951 cend = itext_ichar (p); |
| 428 | 952 while (c <= cend && c < 0400) |
| 953 { | |
| 954 fastmap[c] = 1; | |
| 955 c++; | |
| 956 } | |
| 957 if (c <= cend) | |
| 958 Fput_range_table (make_int (c), make_int (cend), Qt, | |
| 959 Vskip_chars_range_table); | |
| 867 | 960 INC_IBYTEPTR (p); |
| 428 | 961 } |
| 962 else | |
| 963 { | |
| 964 if (c < 0400) | |
| 965 fastmap[c] = 1; | |
| 966 else | |
| 967 Fput_range_table (make_int (c), make_int (c), Qt, | |
| 968 Vskip_chars_range_table); | |
| 969 } | |
| 970 } | |
| 971 } | |
| 972 | |
| 872 | 973 /* #### Not in FSF 21.1 */ |
| 428 | 974 if (syntaxp && fastmap['-'] != 0) |
| 975 fastmap[' '] = 1; | |
| 976 | |
| 977 /* If ^ was the first character, complement the fastmap. | |
| 978 We don't complement the range table, however; we just use negate | |
| 979 in the comparisons below. */ | |
| 980 | |
| 981 if (negate) | |
| 647 | 982 for (i = 0; i < (int) (sizeof (fastmap)); i++) |
| 428 | 983 fastmap[i] ^= 1; |
| 984 | |
| 985 { | |
| 665 | 986 Charbpos start_point = BUF_PT (buf); |
| 872 | 987 Charbpos pos = start_point; |
| 988 Charbpos pos_byte = BYTE_BUF_PT (buf); | |
| 428 | 989 |
| 990 if (syntaxp) | |
| 991 { | |
| 872 | 992 scache = setup_buffer_syntax_cache (buf, pos, forwardp ? 1 : -1); |
| 428 | 993 /* All syntax designators are normal chars so nothing strange |
| 994 to worry about */ | |
| 995 if (forwardp) | |
| 996 { | |
| 872 | 997 if (pos < limit) |
| 998 while (fastmap[(unsigned char) | |
| 999 syntax_code_spec | |
| 1000 [(int) SYNTAX_FROM_CACHE | |
| 1001 (scache, BYTE_BUF_FETCH_CHAR (buf, pos_byte))]]) | |
| 1002 { | |
| 1003 pos++; | |
| 1004 INC_BYTEBPOS (buf, pos_byte); | |
| 879 | 1005 if (pos >= limit) |
| 872 | 1006 break; |
| 1007 UPDATE_SYNTAX_CACHE_FORWARD (scache, pos); | |
| 1008 } | |
| 428 | 1009 } |
| 1010 else | |
| 1011 { | |
| 872 | 1012 while (pos > limit) |
| 460 | 1013 { |
| 872 | 1014 Charbpos savepos = pos_byte; |
| 1015 pos--; | |
| 1016 DEC_BYTEBPOS (buf, pos_byte); | |
| 1017 UPDATE_SYNTAX_CACHE_BACKWARD (scache, pos); | |
| 1018 if (!fastmap[(unsigned char) | |
| 1019 syntax_code_spec | |
| 1020 [(int) SYNTAX_FROM_CACHE | |
| 1021 (scache, BYTE_BUF_FETCH_CHAR (buf, pos_byte))]]) | |
| 1022 { | |
| 1023 pos++; | |
| 1024 pos_byte = savepos; | |
| 1025 break; | |
| 1026 } | |
| 460 | 1027 } |
| 428 | 1028 } |
| 1029 } | |
| 1030 else | |
| 1031 { | |
| 1032 if (forwardp) | |
| 1033 { | |
| 872 | 1034 while (pos < limit) |
| 428 | 1035 { |
| 872 | 1036 Ichar ch = BYTE_BUF_FETCH_CHAR (buf, pos_byte); |
| 428 | 1037 if ((ch < 0400) ? fastmap[ch] : |
| 1038 (NILP (Fget_range_table (make_int (ch), | |
| 1039 Vskip_chars_range_table, | |
| 1040 Qnil)) | |
| 1041 == negate)) | |
| 872 | 1042 { |
| 1043 pos++; | |
| 1044 INC_BYTEBPOS (buf, pos_byte); | |
| 1045 } | |
| 428 | 1046 else |
| 1047 break; | |
| 1048 } | |
| 1049 } | |
| 1050 else | |
| 1051 { | |
| 872 | 1052 while (pos > limit) |
| 428 | 1053 { |
| 872 | 1054 Charbpos prev_pos_byte = pos_byte; |
| 1055 Ichar ch; | |
| 1056 | |
| 1057 DEC_BYTEBPOS (buf, prev_pos_byte); | |
| 1058 ch = BYTE_BUF_FETCH_CHAR (buf, prev_pos_byte); | |
| 428 | 1059 if ((ch < 0400) ? fastmap[ch] : |
| 1060 (NILP (Fget_range_table (make_int (ch), | |
| 1061 Vskip_chars_range_table, | |
| 1062 Qnil)) | |
| 1063 == negate)) | |
| 872 | 1064 { |
| 1065 pos--; | |
| 1066 pos_byte = prev_pos_byte; | |
| 1067 } | |
| 428 | 1068 else |
| 1069 break; | |
| 1070 } | |
| 1071 } | |
| 1072 } | |
| 1073 QUIT; | |
| 872 | 1074 BOTH_BUF_SET_PT (buf, pos, pos_byte); |
| 428 | 1075 return make_int (BUF_PT (buf) - start_point); |
| 1076 } | |
| 1077 } | |
| 1078 | |
| 1079 DEFUN ("skip-chars-forward", Fskip_chars_forward, 1, 3, 0, /* | |
| 444 | 1080 Move point forward, stopping before a char not in STRING, or at pos LIMIT. |
| 428 | 1081 STRING is like the inside of a `[...]' in a regular expression |
| 1082 except that `]' is never special and `\\' quotes `^', `-' or `\\'. | |
| 1083 Thus, with arg "a-zA-Z", this skips letters stopping before first nonletter. | |
| 1084 With arg "^a-zA-Z", skips nonletters stopping before first letter. | |
| 1085 Returns the distance traveled, either zero or positive. | |
| 1086 | |
| 1087 Optional argument BUFFER defaults to the current buffer. | |
| 1088 */ | |
| 444 | 1089 (string, limit, buffer)) |
| 428 | 1090 { |
| 444 | 1091 return skip_chars (decode_buffer (buffer, 0), 1, 0, string, limit); |
| 428 | 1092 } |
| 1093 | |
| 1094 DEFUN ("skip-chars-backward", Fskip_chars_backward, 1, 3, 0, /* | |
| 444 | 1095 Move point backward, stopping after a char not in STRING, or at pos LIMIT. |
| 428 | 1096 See `skip-chars-forward' for details. |
| 1097 Returns the distance traveled, either zero or negative. | |
| 1098 | |
| 1099 Optional argument BUFFER defaults to the current buffer. | |
| 1100 */ | |
| 444 | 1101 (string, limit, buffer)) |
| 428 | 1102 { |
| 444 | 1103 return skip_chars (decode_buffer (buffer, 0), 0, 0, string, limit); |
| 428 | 1104 } |
| 1105 | |
| 1106 | |
| 1107 DEFUN ("skip-syntax-forward", Fskip_syntax_forward, 1, 3, 0, /* | |
| 1108 Move point forward across chars in specified syntax classes. | |
| 1109 SYNTAX is a string of syntax code characters. | |
| 444 | 1110 Stop before a char whose syntax is not in SYNTAX, or at position LIMIT. |
| 428 | 1111 If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. |
| 1112 This function returns the distance traveled, either zero or positive. | |
| 1113 | |
| 1114 Optional argument BUFFER defaults to the current buffer. | |
| 1115 */ | |
| 444 | 1116 (syntax, limit, buffer)) |
| 428 | 1117 { |
| 444 | 1118 return skip_chars (decode_buffer (buffer, 0), 1, 1, syntax, limit); |
| 428 | 1119 } |
| 1120 | |
| 1121 DEFUN ("skip-syntax-backward", Fskip_syntax_backward, 1, 3, 0, /* | |
| 1122 Move point backward across chars in specified syntax classes. | |
| 1123 SYNTAX is a string of syntax code characters. | |
| 444 | 1124 Stop on reaching a char whose syntax is not in SYNTAX, or at position LIMIT. |
| 428 | 1125 If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. |
| 1126 This function returns the distance traveled, either zero or negative. | |
| 1127 | |
| 1128 Optional argument BUFFER defaults to the current buffer. | |
| 1129 */ | |
| 444 | 1130 (syntax, limit, buffer)) |
| 428 | 1131 { |
| 444 | 1132 return skip_chars (decode_buffer (buffer, 0), 0, 1, syntax, limit); |
| 428 | 1133 } |
| 1134 | |
| 1135 | |
| 1136 /* Subroutines of Lisp buffer search functions. */ | |
| 1137 | |
| 1138 static Lisp_Object | |
| 444 | 1139 search_command (Lisp_Object string, Lisp_Object limit, Lisp_Object noerror, |
| 428 | 1140 Lisp_Object count, Lisp_Object buffer, int direction, |
| 1141 int RE, int posix) | |
| 1142 { | |
| 665 | 1143 REGISTER Charbpos np; |
| 1144 Charbpos lim; | |
| 428 | 1145 EMACS_INT n = direction; |
| 1146 struct buffer *buf; | |
| 1147 | |
| 1148 if (!NILP (count)) | |
| 1149 { | |
| 1150 CHECK_INT (count); | |
| 1151 n *= XINT (count); | |
| 1152 } | |
| 1153 | |
| 1154 buf = decode_buffer (buffer, 0); | |
| 1155 CHECK_STRING (string); | |
| 444 | 1156 if (NILP (limit)) |
| 428 | 1157 lim = n > 0 ? BUF_ZV (buf) : BUF_BEGV (buf); |
| 1158 else | |
| 1159 { | |
| 444 | 1160 CHECK_INT_COERCE_MARKER (limit); |
| 1161 lim = XINT (limit); | |
| 428 | 1162 if (n > 0 ? lim < BUF_PT (buf) : lim > BUF_PT (buf)) |
| 563 | 1163 invalid_argument ("Invalid search limit (wrong side of point)", |
| 1164 Qunbound); | |
| 428 | 1165 if (lim > BUF_ZV (buf)) |
| 1166 lim = BUF_ZV (buf); | |
| 1167 if (lim < BUF_BEGV (buf)) | |
| 1168 lim = BUF_BEGV (buf); | |
| 1169 } | |
| 1170 | |
| 1171 np = search_buffer (buf, string, BUF_PT (buf), lim, n, RE, | |
| 1172 (!NILP (buf->case_fold_search) | |
| 446 | 1173 ? XCASE_TABLE_CANON (buf->case_table) |
| 1174 : Qnil), | |
| 428 | 1175 (!NILP (buf->case_fold_search) |
| 446 | 1176 ? XCASE_TABLE_EQV (buf->case_table) |
| 1177 : Qnil), posix); | |
| 428 | 1178 |
| 1179 if (np <= 0) | |
| 1180 { | |
| 444 | 1181 if (NILP (noerror)) |
| 2268 | 1182 { |
| 1183 signal_failure (string); | |
| 1184 RETURN_NOT_REACHED (Qnil); | |
| 1185 } | |
| 444 | 1186 if (!EQ (noerror, Qt)) |
| 428 | 1187 { |
| 1188 if (lim < BUF_BEGV (buf) || lim > BUF_ZV (buf)) | |
| 2500 | 1189 ABORT (); |
| 428 | 1190 BUF_SET_PT (buf, lim); |
| 1191 return Qnil; | |
| 1192 #if 0 /* This would be clean, but maybe programs depend on | |
| 1193 a value of nil here. */ | |
| 1194 np = lim; | |
| 1195 #endif | |
| 1196 } | |
| 1197 else | |
| 1198 return Qnil; | |
| 1199 } | |
| 1200 | |
| 1201 if (np < BUF_BEGV (buf) || np > BUF_ZV (buf)) | |
| 2500 | 1202 ABORT (); |
| 428 | 1203 |
| 1204 BUF_SET_PT (buf, np); | |
| 1205 | |
| 1206 return make_int (np); | |
| 1207 } | |
| 1208 | |
| 1209 static int | |
| 1210 trivial_regexp_p (Lisp_Object regexp) | |
| 1211 { | |
| 1212 Bytecount len = XSTRING_LENGTH (regexp); | |
| 867 | 1213 Ibyte *s = XSTRING_DATA (regexp); |
| 428 | 1214 while (--len >= 0) |
| 1215 { | |
| 1216 switch (*s++) | |
| 1217 { | |
| 1724 | 1218 /* #### howcum ']' doesn't appear here, but ... */ |
| 428 | 1219 case '.': case '*': case '+': case '?': case '[': case '^': case '$': |
| 1220 return 0; | |
| 1221 case '\\': | |
| 1222 if (--len < 0) | |
| 1223 return 0; | |
| 1224 switch (*s++) | |
| 1225 { | |
| 1724 | 1226 /* ... ')' does appear here? ('<' and '>' can appear singly.) */ |
| 1227 /* #### are there other constructs to check? */ | |
| 428 | 1228 case '|': case '(': case ')': case '`': case '\'': case 'b': |
| 1229 case 'B': case '<': case '>': case 'w': case 'W': case 's': | |
| 1724 | 1230 case 'S': case '=': case '{': case '}': |
| 428 | 1231 #ifdef MULE |
| 1232 /* 97/2/25 jhod Added for category matches */ | |
| 1233 case 'c': case 'C': | |
| 1234 #endif /* MULE */ | |
| 1235 case '1': case '2': case '3': case '4': case '5': | |
| 1236 case '6': case '7': case '8': case '9': | |
| 1237 return 0; | |
| 1238 } | |
| 1239 } | |
| 1240 } | |
| 1241 return 1; | |
| 1242 } | |
| 1243 | |
| 1244 /* Search for the n'th occurrence of STRING in BUF, | |
| 665 | 1245 starting at position CHARBPOS and stopping at position BUFLIM, |
| 428 | 1246 treating PAT as a literal string if RE is false or as |
| 1247 a regular expression if RE is true. | |
| 1248 | |
| 1249 If N is positive, searching is forward and BUFLIM must be greater | |
| 665 | 1250 than CHARBPOS. |
| 428 | 1251 If N is negative, searching is backward and BUFLIM must be less |
| 665 | 1252 than CHARBPOS. |
| 428 | 1253 |
| 1254 Returns -x if only N-x occurrences found (x > 0), | |
| 1255 or else the position at the beginning of the Nth occurrence | |
| 1256 (if searching backward) or the end (if searching forward). | |
| 1257 | |
| 1258 POSIX is nonzero if we want full backtracking (POSIX style) | |
| 1259 for this pattern. 0 means backtrack only enough to get a valid match. */ | |
| 665 | 1260 static Charbpos |
| 1261 search_buffer (struct buffer *buf, Lisp_Object string, Charbpos charbpos, | |
| 1262 Charbpos buflim, EMACS_INT n, int RE, Lisp_Object trt, | |
| 446 | 1263 Lisp_Object inverse_trt, int posix) |
| 428 | 1264 { |
| 1265 Bytecount len = XSTRING_LENGTH (string); | |
| 867 | 1266 Ibyte *base_pat = XSTRING_DATA (string); |
| 428 | 1267 REGISTER EMACS_INT i, j; |
| 665 | 1268 Bytebpos p1, p2; |
| 428 | 1269 Bytecount s1, s2; |
| 665 | 1270 Bytebpos pos, lim; |
| 428 | 1271 |
| 853 | 1272 /* Some FSF junk with running_asynch_code, to preserve the match |
| 1273 data. Not necessary because we don't call process filters | |
| 1274 asynchronously (i.e. from within QUIT). */ | |
| 428 | 1275 |
| 1425 | 1276 /* Searching 0 times means noop---don't move, don't touch registers. */ |
| 1277 if (n == 0) | |
| 1278 return charbpos; | |
| 1279 | |
| 428 | 1280 /* Null string is found at starting position. */ |
| 1281 if (len == 0) | |
| 1282 { | |
| 665 | 1283 set_search_regs (buf, charbpos, 0); |
| 1284 return charbpos; | |
| 428 | 1285 } |
| 1286 | |
| 665 | 1287 pos = charbpos_to_bytebpos (buf, charbpos); |
| 1288 lim = charbpos_to_bytebpos (buf, buflim); | |
| 428 | 1289 if (RE && !trivial_regexp_p (string)) |
| 1290 { | |
| 1291 struct re_pattern_buffer *bufp; | |
| 826 | 1292 |
| 1293 bufp = compile_pattern (string, &search_regs, trt, | |
| 1294 wrap_buffer (buf), buf, posix, ERROR_ME); | |
| 428 | 1295 |
| 1296 /* Get pointers and sizes of the two strings | |
| 1297 that make up the visible portion of the buffer. */ | |
| 1298 | |
| 826 | 1299 p1 = BYTE_BUF_BEGV (buf); |
| 1300 p2 = BYTE_BUF_CEILING_OF (buf, p1); | |
| 428 | 1301 s1 = p2 - p1; |
| 826 | 1302 s2 = BYTE_BUF_ZV (buf) - p2; |
| 1303 | |
| 1304 while (n != 0) | |
| 428 | 1305 { |
| 1306 Bytecount val; | |
| 826 | 1307 struct syntax_cache scache_struct; |
| 1308 struct syntax_cache *scache = &scache_struct; | |
| 1309 | |
| 428 | 1310 QUIT; |
| 826 | 1311 /* By making the regex object, regex buffer, and syntax cache |
| 1312 arguments to re_{search,match}{,_2}, we've removed the need to | |
| 1313 do nasty things to deal with regex reentrancy. (See stack | |
| 1314 trace in signal.c for proof that this can happen.) | |
| 1315 | |
| 1316 #### there is still a potential problem with the regex cache -- | |
| 1317 the compiled regex could be overwritten. we'd need 20-fold | |
| 1318 reentrancy, though. Fix this. */ | |
| 1319 | |
| 428 | 1320 val = re_search_2 (bufp, |
| 826 | 1321 (char *) BYTE_BUF_BYTE_ADDRESS (buf, p1), s1, |
| 1322 (char *) BYTE_BUF_BYTE_ADDRESS (buf, p2), s2, | |
| 1323 pos - BYTE_BUF_BEGV (buf), lim - pos, &search_regs, | |
| 1324 n > 0 ? lim - BYTE_BUF_BEGV (buf) : | |
| 1325 pos - BYTE_BUF_BEGV (buf), wrap_buffer (buf), | |
| 1326 buf, scache); | |
| 428 | 1327 |
| 1328 if (val == -2) | |
| 1329 { | |
| 1330 matcher_overflow (); | |
| 1331 } | |
| 1332 if (val >= 0) | |
| 1333 { | |
| 1334 int num_regs = search_regs.num_regs; | |
| 826 | 1335 j = BYTE_BUF_BEGV (buf); |
| 428 | 1336 for (i = 0; i < num_regs; i++) |
| 1337 if (search_regs.start[i] >= 0) | |
| 1338 { | |
| 1339 search_regs.start[i] += j; | |
| 1340 search_regs.end[i] += j; | |
| 1341 } | |
| 793 | 1342 last_thing_searched = wrap_buffer (buf); |
| 428 | 1343 /* Set pos to the new position. */ |
| 826 | 1344 pos = n > 0 ? search_regs.end[0] : search_regs.start[0]; |
| 428 | 1345 fixup_search_regs_for_buffer (buf); |
| 665 | 1346 /* And charbpos too. */ |
| 826 | 1347 charbpos = n > 0 ? search_regs.end[0] : search_regs.start[0]; |
| 428 | 1348 } |
| 1349 else | |
| 826 | 1350 return (n > 0 ? 0 - n : n); |
| 1351 if (n > 0) n--; else n++; | |
| 428 | 1352 } |
| 665 | 1353 return charbpos; |
| 428 | 1354 } |
| 1355 else /* non-RE case */ | |
| 1356 { | |
| 446 | 1357 int charset_base = -1; |
| 1358 int boyer_moore_ok = 1; | |
| 2367 | 1359 Ibyte *patbuf = alloca_ibytes (len * MAX_ICHAR_LEN); |
|
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1360 Ibyte *pat = patbuf; |
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1361 |
| 446 | 1362 #ifdef MULE |
|
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1363 int entirely_one_byte_p = buf->text->entirely_one_byte_p; |
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1364 int nothing_greater_than_0xff = |
|
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1365 buf->text->num_8_bit_fixed_chars == BUF_Z(buf) - BUF_BEG (buf); |
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1366 |
| 446 | 1367 while (len > 0) |
| 1368 { | |
| 867 | 1369 Ibyte tmp_str[MAX_ICHAR_LEN]; |
| 1370 Ichar c, translated, inverse; | |
| 446 | 1371 Bytecount orig_bytelen, new_bytelen, inv_bytelen; |
| 1372 | |
| 1373 /* If we got here and the RE flag is set, it's because | |
| 1374 we're dealing with a regexp known to be trivial, so the | |
| 1375 backslash just quotes the next character. */ | |
| 1376 if (RE && *base_pat == '\\') | |
| 1377 { | |
| 1378 len--; | |
| 1379 base_pat++; | |
| 1380 } | |
| 867 | 1381 c = itext_ichar (base_pat); |
| 446 | 1382 translated = TRANSLATE (trt, c); |
| 1383 inverse = TRANSLATE (inverse_trt, c); | |
| 1384 | |
| 867 | 1385 orig_bytelen = itext_ichar_len (base_pat); |
| 1386 inv_bytelen = set_itext_ichar (tmp_str, inverse); | |
| 1387 new_bytelen = set_itext_ichar (tmp_str, translated); | |
| 446 | 1388 |
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1389 if (boyer_moore_ok |
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1390 /* Only do the Boyer-Moore check for characters needing |
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1391 translation. */ |
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1392 && (translated != c || inverse != c)) |
|
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1393 { |
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1394 Ichar starting_c = c; |
|
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1395 int charset_base_code, checked = 0; |
|
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1396 |
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1397 do |
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1398 { |
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1399 c = TRANSLATE (inverse_trt, c); |
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1400 |
|
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1401 /* If a character cannot occur in the buffer, ignore |
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1402 it. */ |
|
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1403 if (c > 0x7F && entirely_one_byte_p) |
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1404 continue; |
|
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1405 |
|
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1406 if (c > 0xFF && nothing_greater_than_0xff) |
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1407 continue; |
|
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1408 |
|
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1409 checked = 1; |
|
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1410 |
|
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1411 if (-1 == charset_base) /* No charset yet specified. */ |
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|
1412 { |
|
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1413 /* Keep track of which charset and character set row |
|
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1414 contains the characters that need translation. |
|
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changeset
|
1415 |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1416 Zero out the bits corresponding to the last |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1417 byte. */ |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1418 charset_base = c & ~ICHAR_FIELD3_MASK; |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1419 } |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1420 else |
|
4407
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1421 { |
|
4414
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1422 charset_base_code = c & ~ICHAR_FIELD3_MASK; |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1423 |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1424 if (charset_base_code != charset_base) |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1425 { |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1426 /* If two different rows, or two different |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1427 charsets, appear, needing non-ASCII |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1428 translation, then we cannot use boyer_moore |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1429 search. See the comment at the head of |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1430 boyer_moore(). */ |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1431 boyer_moore_ok = 0; |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1432 break; |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1433 } |
|
4407
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1434 } |
|
4901
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1435 |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1436 if (ichar_len (c) > 2) |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1437 { |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1438 /* Case-equivalence plus repeated octets throws off |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1439 the construction of the stride table; avoid this. |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1440 |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1441 It should be possible to correct boyer_moore to |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1442 behave correctly even in this case--it doesn't have |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1443 problems with repeated octets when case conversion |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1444 is not involved--but this is not a critical |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1445 issue. */ |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1446 Ibyte encoded[MAX_ICHAR_LEN]; |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
4962
diff
changeset
|
1447 Bytecount clen = set_itext_ichar (encoded, c); |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
4962
diff
changeset
|
1448 int a, b; |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
4962
diff
changeset
|
1449 for (a = 0; a < clen && boyer_moore_ok; ++a) |
|
4901
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1450 { |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
4962
diff
changeset
|
1451 for (b = a + 1; b < clen && boyer_moore_ok; ++b) |
|
4901
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1452 { |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
4962
diff
changeset
|
1453 if (encoded[a] == encoded[b]) |
|
4901
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1454 { |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1455 boyer_moore_ok = 0; |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1456 } |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1457 } |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1458 } |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1459 |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1460 if (0 == boyer_moore_ok) |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1461 { |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1462 break; |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1463 } |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1464 } |
|
7504864a986c
Don't use Boyer-Moore if repeated octets & case-insensitive search.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4897
diff
changeset
|
1465 |
|
4407
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1466 } while (c != starting_c); |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1467 |
|
4421
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1468 if (!checked) |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1469 { |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1470 #ifdef DEBUG_XEMACS |
| 5041 | 1471 if (debug_searches) |
|
4421
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1472 { |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1473 Lisp_Symbol *sym = XSYMBOL (Qsearch_algorithm_used); |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1474 sym->value = Qnil; |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1475 } |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1476 #endif |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1477 /* The "continue" clauses were used above, for every |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1478 translation of the character. As such, this character |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1479 is not to be found in the buffer and neither is the |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1480 string as a whole. Return immediately; also avoid |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1481 triggering the assertion a few lines down. */ |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1482 return n > 0 ? -n : n; |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1483 } |
|
69b803c646cd
Fail searches immediately if searching for non-representable characters.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4414
diff
changeset
|
1484 |
|
4414
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1485 if (boyer_moore_ok && charset_base != -1 && |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1486 charset_base != (translated & ~ICHAR_FIELD3_MASK)) |
|
4407
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1487 { |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1488 /* In the rare event that the CANON entry for this |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1489 character is not in the desired set, choose one |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1490 that is, from the equivalence set. It doesn't much |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1491 matter which. */ |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1492 Ichar starting_ch = translated; |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1493 do |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1494 { |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1495 translated = TRANSLATE (inverse_trt, translated); |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1496 |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1497 if (charset_base == (translated & ~ICHAR_FIELD3_MASK)) |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1498 break; |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1499 |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1500 } while (starting_ch != translated); |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1501 |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1502 assert (starting_ch != translated); |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1503 |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1504 new_bytelen = set_itext_ichar (tmp_str, translated); |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1505 } |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1506 } |
|
4ee73bbe4f8e
Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4322
diff
changeset
|
1507 |
| 446 | 1508 memcpy (pat, tmp_str, new_bytelen); |
| 1509 pat += new_bytelen; | |
| 1510 base_pat += orig_bytelen; | |
| 1511 len -= orig_bytelen; | |
| 1512 } | |
|
4414
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1513 |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1514 if (-1 == charset_base) |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1515 { |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1516 charset_base = 'a' & ~ICHAR_FIELD3_MASK; /* Default to ASCII. */ |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1517 } |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1518 |
| 446 | 1519 #else /* not MULE */ |
| 1520 while (--len >= 0) | |
| 1521 { | |
| 1522 /* If we got here and the RE flag is set, it's because | |
| 1523 we're dealing with a regexp known to be trivial, so the | |
| 1524 backslash just quotes the next character. */ | |
| 1525 if (RE && *base_pat == '\\') | |
| 1526 { | |
| 1527 len--; | |
| 1528 base_pat++; | |
| 1529 } | |
| 1530 *pat++ = TRANSLATE (trt, *base_pat++); | |
| 1531 } | |
| 1532 #endif /* MULE */ | |
| 1533 len = pat - patbuf; | |
| 1534 pat = base_pat = patbuf; | |
|
4414
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1535 |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
1536 #ifdef DEBUG_XEMACS |
| 5041 | 1537 if (debug_searches) |
|
4414
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
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|
1538 { |
|
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|
1539 Lisp_Symbol *sym = XSYMBOL (Qsearch_algorithm_used); |
|
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|
1540 sym->value = boyer_moore_ok ? Qboyer_moore : Qsimple_search; |
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1541 } |
|
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|
1542 #endif |
|
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|
1543 |
| 446 | 1544 if (boyer_moore_ok) |
| 1545 return boyer_moore (buf, base_pat, len, pos, lim, n, | |
| 1546 trt, inverse_trt, charset_base); | |
| 1547 else | |
| 1548 return simple_search (buf, base_pat, len, pos, lim, n, trt); | |
| 1549 } | |
| 1550 } | |
| 1551 | |
| 826 | 1552 /* Do a simple string search N times for the string PAT, whose length is |
| 1553 LEN/LEN_BYTE, from buffer position POS until LIM. TRT is the | |
| 1554 translation table. | |
| 446 | 1555 |
| 1556 Return the character position where the match is found. | |
| 1557 Otherwise, if M matches remained to be found, return -M. | |
| 1558 | |
| 1559 This kind of search works regardless of what is in PAT and | |
| 1560 regardless of what is in TRT. It is used in cases where | |
| 1561 boyer_moore cannot work. */ | |
| 1562 | |
| 665 | 1563 static Charbpos |
| 867 | 1564 simple_search (struct buffer *buf, Ibyte *base_pat, Bytecount len, |
| 826 | 1565 Bytebpos pos, Bytebpos lim, EMACS_INT n, Lisp_Object trt) |
| 446 | 1566 { |
| 1567 int forward = n > 0; | |
| 1568 Bytecount buf_len = 0; /* Shut up compiler. */ | |
| 1569 | |
| 826 | 1570 if (lim > pos) |
| 446 | 1571 while (n > 0) |
| 428 | 1572 { |
| 446 | 1573 while (1) |
| 428 | 1574 { |
| 826 | 1575 Bytecount this_len = len; |
| 1576 Bytebpos this_pos = pos; | |
| 867 | 1577 Ibyte *p = base_pat; |
| 826 | 1578 if (pos >= lim) |
| 446 | 1579 goto stop; |
| 1580 | |
| 1581 while (this_len > 0) | |
| 1582 { | |
| 867 | 1583 Ichar pat_ch, buf_ch; |
| 446 | 1584 Bytecount pat_len; |
| 1585 | |
| 867 | 1586 pat_ch = itext_ichar (p); |
| 826 | 1587 buf_ch = BYTE_BUF_FETCH_CHAR (buf, this_pos); |
| 446 | 1588 |
| 1589 buf_ch = TRANSLATE (trt, buf_ch); | |
| 1590 | |
| 1591 if (buf_ch != pat_ch) | |
| 1592 break; | |
| 1593 | |
| 867 | 1594 pat_len = itext_ichar_len (p); |
| 446 | 1595 p += pat_len; |
| 1596 this_len -= pat_len; | |
| 826 | 1597 INC_BYTEBPOS (buf, this_pos); |
| 446 | 1598 } |
| 1599 if (this_len == 0) | |
| 428 | 1600 { |
| 826 | 1601 buf_len = this_pos - pos; |
| 1602 pos = this_pos; | |
| 446 | 1603 break; |
| 428 | 1604 } |
| 826 | 1605 INC_BYTEBPOS (buf, pos); |
| 428 | 1606 } |
| 446 | 1607 n--; |
| 1608 } | |
| 1609 else | |
|
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1610 { |
|
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1611 /* If lim < len, then there are too few buffer positions to hold the |
|
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1612 pattern between the beginning of the buffer and lim. Adjust to |
|
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1613 ensure pattern fits. If we don't do this, we can assert in the |
|
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1614 DEC_BYTEBPOS below. */ |
|
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1615 if (lim < len) |
|
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1616 lim = len; |
|
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1617 while (n < 0) |
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1618 { |
|
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1619 while (1) |
|
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1620 { |
|
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1621 Bytecount this_len = len; |
|
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1622 Bytebpos this_pos = pos; |
|
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1623 Ibyte *p; |
|
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1624 if (pos <= lim) |
|
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1625 goto stop; |
|
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1626 p = base_pat + len; |
|
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1627 |
|
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1628 while (this_len > 0) |
|
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1629 { |
|
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1630 Ichar pat_ch, buf_ch; |
|
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1631 |
|
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1632 DEC_IBYTEPTR (p); |
|
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1633 DEC_BYTEBPOS (buf, this_pos); |
|
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1634 pat_ch = itext_ichar (p); |
|
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1635 buf_ch = BYTE_BUF_FETCH_CHAR (buf, this_pos); |
|
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1636 |
|
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1637 buf_ch = TRANSLATE (trt, buf_ch); |
|
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1638 |
|
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1639 if (buf_ch != pat_ch) |
|
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1640 break; |
|
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1641 |
|
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1642 this_len -= itext_ichar_len (p); |
|
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1643 } |
|
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1644 if (this_len == 0) |
|
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1645 { |
|
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1646 buf_len = pos - this_pos; |
|
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1647 pos = this_pos; |
| 446 | 1648 break; |
|
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1649 } |
|
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1650 DEC_BYTEBPOS (buf, pos); |
|
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1651 } |
|
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1652 n++; |
|
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1653 } |
|
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|
1654 } |
| 446 | 1655 stop: |
| 1656 if (n == 0) | |
| 1657 { | |
| 665 | 1658 Charbpos beg, end, retval; |
| 446 | 1659 if (forward) |
| 1660 { | |
| 826 | 1661 beg = bytebpos_to_charbpos (buf, pos - buf_len); |
| 1662 retval = end = bytebpos_to_charbpos (buf, pos); | |
| 446 | 1663 } |
| 1664 else | |
| 428 | 1665 { |
| 826 | 1666 retval = beg = bytebpos_to_charbpos (buf, pos); |
| 1667 end = bytebpos_to_charbpos (buf, pos + buf_len); | |
| 428 | 1668 } |
| 446 | 1669 set_search_regs (buf, beg, end - beg); |
| 1670 | |
| 1671 return retval; | |
| 1672 } | |
| 1673 else if (n > 0) | |
| 1674 return -n; | |
| 1675 else | |
| 1676 return n; | |
| 1677 } | |
| 1678 | |
| 1679 /* Do Boyer-Moore search N times for the string PAT, | |
| 1680 whose length is LEN/LEN_BYTE, | |
| 1681 from buffer position POS/POS_BYTE until LIM/LIM_BYTE. | |
| 1682 DIRECTION says which direction we search in. | |
| 1683 TRT and INVERSE_TRT are translation tables. | |
| 1684 | |
| 1685 This kind of search works if all the characters in PAT that have | |
|
4414
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|
1686 (non-ASCII) translation are the same aside from the last byte. This |
|
df576f30c1d8
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|
1687 makes it possible to translate just the last byte of a character, and do |
|
df576f30c1d8
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|
1688 so after just a simple test of the context. |
| 446 | 1689 |
|
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|
1690 If that criterion is not satisfied, do not call this function. You will |
|
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1691 get an assertion failure. */ |
| 446 | 1692 |
| 665 | 1693 static Charbpos |
| 867 | 1694 boyer_moore (struct buffer *buf, Ibyte *base_pat, Bytecount len, |
| 665 | 1695 Bytebpos pos, Bytebpos lim, EMACS_INT n, Lisp_Object trt, |
| 2333 | 1696 Lisp_Object inverse_trt, int USED_IF_MULE (charset_base)) |
| 446 | 1697 { |
| 1698 /* #### Someone really really really needs to comment the workings | |
| 1699 of this junk somewhat better. | |
| 1700 | |
| 1701 BTW "BM" stands for Boyer-Moore, which is one of the standard | |
| 1702 string-searching algorithms. It's the best string-searching | |
| 1703 algorithm out there, provided that: | |
| 1704 | |
| 1705 a) You're not fazed by algorithm complexity. (Rabin-Karp, which | |
| 1706 uses hashing, is much much easier to code but not as fast.) | |
| 1707 b) You can freely move backwards in the string that you're | |
| 1708 searching through. | |
| 1709 | |
| 1710 As the comment below tries to explain (but garbles in typical | |
| 1711 programmer-ese), the idea is that you don't have to do a | |
| 1712 string match at every successive position in the text. For | |
| 1713 example, let's say the pattern is "a very long string". We | |
| 1714 compare the last character in the string (`g') with the | |
| 1715 corresponding character in the text. If it mismatches, and | |
| 1716 it is, say, `z', then we can skip forward by the entire | |
| 1717 length of the pattern because `z' does not occur anywhere | |
| 1718 in the pattern. If the mismatching character does occur | |
| 1719 in the pattern, we can usually still skip forward by more | |
| 1720 than one: e.g. if it is `l', then we can skip forward | |
| 1721 by the length of the substring "ong string" -- i.e. the | |
| 1722 largest end section of the pattern that does not contain | |
| 1723 the mismatched character. So what we do is compute, for | |
| 1724 each possible character, the distance we can skip forward | |
| 1725 (the "stride") and use it in the string matching. This | |
| 1726 is what the BM_tab holds. */ | |
| 1727 REGISTER EMACS_INT *BM_tab; | |
| 1728 EMACS_INT *BM_tab_base; | |
| 1729 REGISTER Bytecount dirlen; | |
| 1730 EMACS_INT infinity; | |
| 665 | 1731 Bytebpos limit; |
| 446 | 1732 Bytecount stride_for_teases = 0; |
| 1733 REGISTER EMACS_INT i, j; | |
| 867 | 1734 Ibyte *pat, *pat_end; |
| 1735 REGISTER Ibyte *cursor, *p_limit, *ptr2; | |
| 1736 Ibyte simple_translate[0400]; | |
| 446 | 1737 REGISTER int direction = ((n > 0) ? 1 : -1); |
| 1738 #ifdef MULE | |
| 867 | 1739 Ibyte translate_prev_byte = 0; |
| 1740 Ibyte translate_anteprev_byte = 0; | |
|
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1741 /* These need to be rethought in the event that the internal format |
|
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1742 changes, or in the event that num_8_bit_fixed_chars disappears |
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1743 (entirely_one_byte_p can be trivially worked out by checking is the |
|
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1744 byte count equal to the char count.) */ |
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1745 int buffer_entirely_one_byte_p = buf->text->entirely_one_byte_p; |
|
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1746 int buffer_nothing_greater_than_0xff = |
|
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1747 buf->text->num_8_bit_fixed_chars == BUF_Z(buf) - BUF_BEG (buf); |
| 446 | 1748 #endif |
| 1749 #ifdef C_ALLOCA | |
| 1750 EMACS_INT BM_tab_space[0400]; | |
| 1751 BM_tab = &BM_tab_space[0]; | |
| 1752 #else | |
| 1753 BM_tab = alloca_array (EMACS_INT, 256); | |
| 1754 #endif | |
| 1755 | |
| 1756 /* The general approach is that we are going to maintain that we | |
| 1757 know the first (closest to the present position, in whatever | |
| 1758 direction we're searching) character that could possibly be | |
| 1759 the last (furthest from present position) character of a | |
| 1760 valid match. We advance the state of our knowledge by | |
| 1761 looking at that character and seeing whether it indeed | |
| 1762 matches the last character of the pattern. If it does, we | |
| 1763 take a closer look. If it does not, we move our pointer (to | |
| 1764 putative last characters) as far as is logically possible. | |
| 1765 This amount of movement, which I call a stride, will be the | |
| 1766 length of the pattern if the actual character appears nowhere | |
| 1767 in the pattern, otherwise it will be the distance from the | |
| 1768 last occurrence of that character to the end of the pattern. | |
| 1769 As a coding trick, an enormous stride is coded into the table | |
| 1770 for characters that match the last character. This allows | |
| 1771 use of only a single test, a test for having gone past the | |
| 1772 end of the permissible match region, to test for both | |
| 1773 possible matches (when the stride goes past the end | |
| 1774 immediately) and failure to match (where you get nudged past | |
| 1775 the end one stride at a time). | |
| 1776 | |
| 1777 Here we make a "mickey mouse" BM table. The stride of the | |
| 1778 search is determined only by the last character of the | |
| 1779 putative match. If that character does not match, we will | |
| 1780 stride the proper distance to propose a match that | |
| 1781 superimposes it on the last instance of a character that | |
| 1782 matches it (per trt), or misses it entirely if there is | |
| 1783 none. */ | |
| 1784 | |
| 1785 dirlen = len * direction; | |
| 1786 infinity = dirlen - (lim + pos + len + len) * direction; | |
| 1787 /* Record position after the end of the pattern. */ | |
| 1788 pat_end = base_pat + len; | |
| 1789 if (direction < 0) | |
| 1790 base_pat = pat_end - 1; | |
| 1791 BM_tab_base = BM_tab; | |
| 1792 BM_tab += 0400; | |
| 1793 j = dirlen; /* to get it in a register */ | |
| 1794 /* A character that does not appear in the pattern induces a | |
| 1795 stride equal to the pattern length. */ | |
| 1796 while (BM_tab_base != BM_tab) | |
| 1797 { | |
| 1798 *--BM_tab = j; | |
| 1799 *--BM_tab = j; | |
| 1800 *--BM_tab = j; | |
| 1801 *--BM_tab = j; | |
| 1802 } | |
| 1803 /* We use this for translation, instead of TRT itself. We | |
| 1804 fill this in to handle the characters that actually occur | |
| 1805 in the pattern. Others don't matter anyway! */ | |
| 1806 xzero (simple_translate); | |
| 1807 for (i = 0; i < 0400; i++) | |
| 867 | 1808 simple_translate[i] = (Ibyte) i; |
| 446 | 1809 i = 0; |
| 1425 | 1810 |
| 446 | 1811 while (i != infinity) |
| 1812 { | |
| 867 | 1813 Ibyte *ptr = base_pat + i; |
| 446 | 1814 i += direction; |
| 1815 if (i == dirlen) | |
| 1816 i = infinity; | |
| 1817 if (!NILP (trt)) | |
| 428 | 1818 { |
| 446 | 1819 #ifdef MULE |
|
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|
1820 Ichar ch = -1, untranslated; |
|
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|
1821 Ibyte byte; |
| 446 | 1822 int this_translated = 1; |
| 1823 | |
| 1824 /* Is *PTR the last byte of a character? */ | |
| 867 | 1825 if (pat_end - ptr == 1 || ibyte_first_byte_p (ptr[1])) |
| 428 | 1826 { |
| 867 | 1827 Ibyte *charstart = ptr; |
| 1828 while (!ibyte_first_byte_p (*charstart)) | |
| 446 | 1829 charstart--; |
| 867 | 1830 untranslated = itext_ichar (charstart); |
|
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|
1831 |
|
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|
1832 ch = TRANSLATE (trt, untranslated); |
|
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|
1833 if (!ibyte_first_byte_p (*ptr)) |
|
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|
1834 { |
|
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|
1835 translate_prev_byte = ptr[-1]; |
|
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|
1836 if (!ibyte_first_byte_p (translate_prev_byte)) |
|
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Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings.
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|
1837 translate_anteprev_byte = ptr[-2]; |
|
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|
1838 } |
|
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|
1839 |
|
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|
1840 if (ch != untranslated && /* Was translation done? */ |
|
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|
1841 charset_base != (ch & ~ICHAR_FIELD3_MASK)) |
|
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|
1842 { |
|
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1843 /* In the very rare event that the CANON entry for this |
|
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1844 character is not in the desired set, choose one that |
|
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|
1845 is, from the equivalence set. It doesn't much matter |
|
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|
1846 which, since we're building our own cheesy equivalence |
|
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|
1847 table instead of using that belonging to the case |
|
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|
1848 table directly. |
|
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1849 |
|
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|
1850 We can get here if search_buffer has worked out that |
|
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|
1851 the buffer is entirely single width. */ |
|
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|
1852 Ichar starting_ch = ch; |
|
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|
1853 int count = 0; |
|
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|
1854 do |
|
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1855 { |
|
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1856 ch = TRANSLATE (inverse_trt, ch); |
|
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1857 if (charset_base == (ch & ~ICHAR_FIELD3_MASK)) |
|
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1858 break; |
|
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|
1859 ++count; |
|
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1860 } while (starting_ch != ch); |
|
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1861 |
|
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1862 /* If starting_ch is equal to ch (and count is not one, |
|
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1863 which means no translation is necessary), the case |
|
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|
1864 table is corrupt. (Any mapping in the canon table |
|
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changeset
|
1865 should be reflected in the equivalence table, and we |
|
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1866 know from the canon table that untranslated maps to |
|
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|
1867 starting_ch and that untranslated has the correct value |
|
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|
1868 for charset_base.) */ |
|
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|
1869 assert (1 == count || starting_ch != ch); |
| 446 | 1870 } |
|
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1871 { |
|
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1872 Ibyte tmp[MAX_ICHAR_LEN]; |
|
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1873 Bytecount chlen; |
|
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1874 |
|
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1875 chlen = set_itext_ichar (tmp, ch); |
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1876 byte = tmp[chlen - 1]; |
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1877 } |
| 428 | 1878 } |
| 1879 else | |
| 1880 { | |
|
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1881 byte = *ptr; |
| 446 | 1882 this_translated = 0; |
|
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1883 ch = -1; |
| 446 | 1884 } |
|
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1885 |
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1886 /* BYTE = last byte of character CH when represented as text */ |
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1887 j = byte; |
| 446 | 1888 |
| 1889 if (i == infinity) | |
| 1890 stride_for_teases = BM_tab[j]; | |
| 1891 BM_tab[j] = dirlen - i; | |
|
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1892 /* A translation table is accompanied by its inverse -- see |
|
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1893 comment in casetab.c. */ |
| 446 | 1894 if (this_translated) |
| 1895 { | |
| 867 | 1896 Ichar starting_ch = ch; |
| 446 | 1897 EMACS_INT starting_j = j; |
|
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1898 |
|
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1899 text_checking_assert (valid_ichar_p (ch)); |
|
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1900 do |
| 446 | 1901 { |
| 1902 ch = TRANSLATE (inverse_trt, ch); | |
|
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1903 |
|
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|
1904 if (ch > 0x7F && buffer_entirely_one_byte_p) |
|
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|
1905 continue; |
|
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|
1906 |
|
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1907 if (ch > 0xFF && buffer_nothing_greater_than_0xff) |
|
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|
1908 continue; |
|
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|
1909 |
|
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1910 |
|
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1911 /* Retrieve last byte of character CH when represented as |
|
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|
1912 text */ |
|
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1913 { |
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1914 Ibyte tmp[MAX_ICHAR_LEN]; |
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|
1915 Bytecount chlen; |
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1916 |
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1917 chlen = set_itext_ichar (tmp, ch); |
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1918 j = tmp[chlen - 1]; |
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1919 } |
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1920 |
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1921 /* For all the characters that map into CH, set up |
|
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|
1922 simple_translate to map the last byte into |
|
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|
1923 STARTING_J. */ |
|
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|
1924 simple_translate[j] = (Ibyte) starting_j; |
|
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|
1925 BM_tab[j] = dirlen - i; |
|
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|
1926 |
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|
1927 } |
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|
1928 while (ch != starting_ch); |
| 446 | 1929 } |
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|
1930 #else /* not MULE */ |
| 446 | 1931 EMACS_INT k; |
| 1932 j = *ptr; | |
| 1933 k = (j = TRANSLATE (trt, j)); | |
| 1934 if (i == infinity) | |
| 1935 stride_for_teases = BM_tab[j]; | |
| 1936 BM_tab[j] = dirlen - i; | |
| 1937 /* A translation table is accompanied by its inverse -- | |
| 826 | 1938 see comment in casetab.c. */ |
| 446 | 1939 while ((j = TRANSLATE (inverse_trt, j)) != k) |
| 1940 { | |
| 867 | 1941 simple_translate[j] = (Ibyte) k; |
| 428 | 1942 BM_tab[j] = dirlen - i; |
| 1943 } | |
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|
1944 #endif /* (not) MULE */ |
| 446 | 1945 } |
| 1946 else | |
| 1947 { | |
| 1948 j = *ptr; | |
| 1949 | |
| 1950 if (i == infinity) | |
| 1951 stride_for_teases = BM_tab[j]; | |
| 1952 BM_tab[j] = dirlen - i; | |
| 428 | 1953 } |
| 446 | 1954 /* stride_for_teases tells how much to stride if we get a |
| 1955 match on the far character but are subsequently | |
| 1956 disappointed, by recording what the stride would have been | |
| 1957 for that character if the last character had been | |
| 1958 different. */ | |
| 1959 } | |
| 1960 infinity = dirlen - infinity; | |
| 1961 pos += dirlen - ((direction > 0) ? direction : 0); | |
| 1962 /* loop invariant - pos points at where last char (first char if | |
| 1963 reverse) of pattern would align in a possible match. */ | |
| 1964 while (n != 0) | |
| 1965 { | |
| 665 | 1966 Bytebpos tail_end; |
| 867 | 1967 Ibyte *tail_end_ptr; |
| 446 | 1968 /* It's been reported that some (broken) compiler thinks |
| 1969 that Boolean expressions in an arithmetic context are | |
| 1970 unsigned. Using an explicit ?1:0 prevents this. */ | |
| 1971 if ((lim - pos - ((direction > 0) ? 1 : 0)) * direction < 0) | |
| 1972 return n * (0 - direction); | |
| 1973 /* First we do the part we can by pointers (maybe | |
| 1974 nothing) */ | |
| 1975 QUIT; | |
| 1976 pat = base_pat; | |
| 1977 limit = pos - dirlen + direction; | |
| 1978 /* XEmacs change: definitions of CEILING_OF and FLOOR_OF | |
| 1979 have changed. See buffer.h. */ | |
| 1980 limit = ((direction > 0) | |
| 826 | 1981 ? BYTE_BUF_CEILING_OF (buf, limit) - 1 |
| 1982 : BYTE_BUF_FLOOR_OF (buf, limit + 1)); | |
| 446 | 1983 /* LIMIT is now the last (not beyond-last!) value POS can |
| 1984 take on without hitting edge of buffer or the gap. */ | |
| 1985 limit = ((direction > 0) | |
| 1986 ? min (lim - 1, min (limit, pos + 20000)) | |
| 1987 : max (lim, max (limit, pos - 20000))); | |
| 826 | 1988 tail_end = BYTE_BUF_CEILING_OF (buf, pos); |
| 1989 tail_end_ptr = BYTE_BUF_BYTE_ADDRESS (buf, tail_end); | |
| 446 | 1990 |
| 1991 if ((limit - pos) * direction > 20) | |
| 428 | 1992 { |
| 826 | 1993 /* We have to be careful because the code can generate addresses |
| 1994 that don't point to the beginning of characters. */ | |
| 1995 p_limit = BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, limit); | |
| 1996 ptr2 = (cursor = BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, pos)); | |
| 446 | 1997 /* In this loop, pos + cursor - ptr2 is the surrogate |
| 1998 for pos */ | |
| 1999 while (1) /* use one cursor setting as long as i can */ | |
| 2000 { | |
| 2001 if (direction > 0) /* worth duplicating */ | |
| 2002 { | |
| 2003 /* Use signed comparison if appropriate to make | |
| 2004 cursor+infinity sure to be > p_limit. | |
| 2005 Assuming that the buffer lies in a range of | |
| 2006 addresses that are all "positive" (as ints) | |
| 2007 or all "negative", either kind of comparison | |
| 2008 will work as long as we don't step by | |
| 2009 infinity. So pick the kind that works when | |
| 2010 we do step by infinity. */ | |
| 2011 if ((EMACS_INT) (p_limit + infinity) > | |
| 2012 (EMACS_INT) p_limit) | |
| 2013 while ((EMACS_INT) cursor <= | |
| 2014 (EMACS_INT) p_limit) | |
| 2015 cursor += BM_tab[*cursor]; | |
| 2016 else | |
| 2017 while ((EMACS_UINT) cursor <= | |
| 2018 (EMACS_UINT) p_limit) | |
| 2019 cursor += BM_tab[*cursor]; | |
| 2020 } | |
| 2021 else | |
| 2022 { | |
| 2023 if ((EMACS_INT) (p_limit + infinity) < | |
| 2024 (EMACS_INT) p_limit) | |
| 2025 while ((EMACS_INT) cursor >= | |
| 2026 (EMACS_INT) p_limit) | |
| 2027 cursor += BM_tab[*cursor]; | |
| 2028 else | |
| 2029 while ((EMACS_UINT) cursor >= | |
| 2030 (EMACS_UINT) p_limit) | |
| 2031 cursor += BM_tab[*cursor]; | |
| 2032 } | |
| 2033 /* If you are here, cursor is beyond the end of the | |
| 2034 searched region. This can happen if you match on | |
| 2035 the far character of the pattern, because the | |
| 2036 "stride" of that character is infinity, a number | |
| 2037 able to throw you well beyond the end of the | |
| 2038 search. It can also happen if you fail to match | |
| 2039 within the permitted region and would otherwise | |
| 2040 try a character beyond that region */ | |
| 2041 if ((cursor - p_limit) * direction <= len) | |
| 2042 break; /* a small overrun is genuine */ | |
| 2043 cursor -= infinity; /* large overrun = hit */ | |
| 2044 i = dirlen - direction; | |
| 2045 if (!NILP (trt)) | |
| 2046 { | |
| 2047 while ((i -= direction) + direction != 0) | |
| 2048 { | |
| 2049 #ifdef MULE | |
| 867 | 2050 Ichar ch; |
| 446 | 2051 cursor -= direction; |
| 2052 /* Translate only the last byte of a character. */ | |
| 2053 if ((cursor == tail_end_ptr | |
| 867 | 2054 || ibyte_first_byte_p (cursor[1])) |
| 2055 && (ibyte_first_byte_p (cursor[0]) | |
| 446 | 2056 || (translate_prev_byte == cursor[-1] |
| 867 | 2057 && (ibyte_first_byte_p (translate_prev_byte) |
| 446 | 2058 || translate_anteprev_byte == cursor[-2])))) |
| 2059 ch = simple_translate[*cursor]; | |
| 2060 else | |
| 2061 ch = *cursor; | |
| 2062 if (pat[i] != ch) | |
| 2063 break; | |
| 2064 #else | |
| 2065 if (pat[i] != TRANSLATE (trt, *(cursor -= direction))) | |
| 2066 break; | |
| 2067 #endif | |
| 2068 } | |
| 2069 } | |
| 2070 else | |
| 2071 { | |
| 2072 while ((i -= direction) + direction != 0) | |
| 2073 if (pat[i] != *(cursor -= direction)) | |
| 2074 break; | |
| 2075 } | |
| 2076 cursor += dirlen - i - direction; /* fix cursor */ | |
| 2077 if (i + direction == 0) | |
| 2078 { | |
| 2079 cursor -= direction; | |
| 2080 | |
| 2081 { | |
| 665 | 2082 Bytebpos bytstart = (pos + cursor - ptr2 + |
| 446 | 2083 ((direction > 0) |
| 2084 ? 1 - len : 0)); | |
| 665 | 2085 Charbpos bufstart = bytebpos_to_charbpos (buf, bytstart); |
| 2086 Charbpos bufend = bytebpos_to_charbpos (buf, bytstart + len); | |
| 446 | 2087 |
| 2088 set_search_regs (buf, bufstart, bufend - bufstart); | |
| 2089 } | |
| 2090 | |
| 2091 if ((n -= direction) != 0) | |
| 2092 cursor += dirlen; /* to resume search */ | |
| 2093 else | |
| 2094 return ((direction > 0) | |
| 2095 ? search_regs.end[0] : search_regs.start[0]); | |
| 2096 } | |
| 2097 else | |
| 2098 cursor += stride_for_teases; /* <sigh> we lose - */ | |
| 2099 } | |
| 2100 pos += cursor - ptr2; | |
| 2101 } | |
| 2102 else | |
| 2103 /* Now we'll pick up a clump that has to be done the hard | |
| 2104 way because it covers a discontinuity */ | |
| 2105 { | |
| 428 | 2106 /* XEmacs change: definitions of CEILING_OF and FLOOR_OF |
| 2107 have changed. See buffer.h. */ | |
| 2108 limit = ((direction > 0) | |
| 826 | 2109 ? BYTE_BUF_CEILING_OF (buf, pos - dirlen + 1) - 1 |
| 2110 : BYTE_BUF_FLOOR_OF (buf, pos - dirlen)); | |
| 428 | 2111 limit = ((direction > 0) |
| 446 | 2112 ? min (limit + len, lim - 1) |
| 2113 : max (limit - len, lim)); | |
| 2114 /* LIMIT is now the last value POS can have | |
| 2115 and still be valid for a possible match. */ | |
| 2116 while (1) | |
| 428 | 2117 { |
| 446 | 2118 /* This loop can be coded for space rather than |
| 2119 speed because it will usually run only once. | |
| 2120 (the reach is at most len + 21, and typically | |
| 2121 does not exceed len) */ | |
| 2122 while ((limit - pos) * direction >= 0) | |
| 826 | 2123 /* *not* BYTE_BUF_FETCH_CHAR. We are working here |
| 446 | 2124 with bytes, not characters. */ |
| 826 | 2125 pos += BM_tab[*BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, pos)]; |
| 446 | 2126 /* now run the same tests to distinguish going off |
| 2127 the end, a match or a phony match. */ | |
| 2128 if ((pos - limit) * direction <= len) | |
| 2129 break; /* ran off the end */ | |
| 2130 /* Found what might be a match. | |
| 2131 Set POS back to last (first if reverse) char pos. */ | |
| 2132 pos -= infinity; | |
| 2133 i = dirlen - direction; | |
| 2134 while ((i -= direction) + direction != 0) | |
| 428 | 2135 { |
| 446 | 2136 #ifdef MULE |
| 867 | 2137 Ichar ch; |
| 2138 Ibyte *ptr; | |
| 446 | 2139 #endif |
| 2140 pos -= direction; | |
| 2141 #ifdef MULE | |
| 826 | 2142 ptr = BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, pos); |
| 446 | 2143 if ((ptr == tail_end_ptr |
| 867 | 2144 || ibyte_first_byte_p (ptr[1])) |
| 2145 && (ibyte_first_byte_p (ptr[0]) | |
| 446 | 2146 || (translate_prev_byte == ptr[-1] |
| 867 | 2147 && (ibyte_first_byte_p (translate_prev_byte) |
| 446 | 2148 || translate_anteprev_byte == ptr[-2])))) |
| 2149 ch = simple_translate[*ptr]; | |
| 428 | 2150 else |
| 446 | 2151 ch = *ptr; |
| 2152 if (pat[i] != ch) | |
| 2153 break; | |
| 2154 | |
| 2155 #else | |
| 826 | 2156 if (pat[i] != |
| 2157 TRANSLATE (trt, | |
| 2158 *BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, pos))) | |
| 446 | 2159 break; |
| 2160 #endif | |
| 428 | 2161 } |
| 446 | 2162 /* Above loop has moved POS part or all the way back |
| 2163 to the first char pos (last char pos if reverse). | |
| 2164 Set it once again at the last (first if reverse) | |
| 2165 char. */ | |
| 2166 pos += dirlen - i- direction; | |
| 2167 if (i + direction == 0) | |
| 428 | 2168 { |
| 446 | 2169 pos -= direction; |
| 2170 | |
| 2171 { | |
| 665 | 2172 Bytebpos bytstart = (pos + |
| 446 | 2173 ((direction > 0) |
| 2174 ? 1 - len : 0)); | |
| 665 | 2175 Charbpos bufstart = bytebpos_to_charbpos (buf, bytstart); |
| 2176 Charbpos bufend = bytebpos_to_charbpos (buf, bytstart + len); | |
| 446 | 2177 |
| 2178 set_search_regs (buf, bufstart, bufend - bufstart); | |
| 2179 } | |
| 2180 | |
| 2181 if ((n -= direction) != 0) | |
| 2182 pos += dirlen; /* to resume search */ | |
| 428 | 2183 else |
| 446 | 2184 return ((direction > 0) |
| 2185 ? search_regs.end[0] : search_regs.start[0]); | |
| 428 | 2186 } |
| 446 | 2187 else |
| 2188 pos += stride_for_teases; | |
| 2189 } | |
| 428 | 2190 } |
| 446 | 2191 /* We have done one clump. Can we continue? */ |
| 2192 if ((lim - pos) * direction < 0) | |
| 2193 return (0 - n) * direction; | |
| 428 | 2194 } |
| 665 | 2195 return bytebpos_to_charbpos (buf, pos); |
| 428 | 2196 } |
| 2197 | |
| 1024 | 2198 /* Record the whole-match data (beginning BEG and end BEG + LEN) and the |
| 2199 buffer for a match just found. */ | |
| 428 | 2200 |
| 2201 static void | |
| 665 | 2202 set_search_regs (struct buffer *buf, Charbpos beg, Charcount len) |
| 428 | 2203 { |
| 2204 /* Make sure we have registers in which to store | |
| 2205 the match position. */ | |
| 2206 if (search_regs.num_regs == 0) | |
| 2207 { | |
| 2208 search_regs.start = xnew (regoff_t); | |
| 2209 search_regs.end = xnew (regoff_t); | |
| 2210 search_regs.num_regs = 1; | |
| 2211 } | |
| 2212 | |
| 1468 | 2213 clear_search_regs (); |
| 428 | 2214 search_regs.start[0] = beg; |
| 2215 search_regs.end[0] = beg + len; | |
| 793 | 2216 last_thing_searched = wrap_buffer (buf); |
| 428 | 2217 } |
| 2218 | |
| 1468 | 2219 /* Clear search registers so match data will be null. */ |
| 1024 | 2220 |
| 2221 static void | |
| 1468 | 2222 clear_search_regs (void) |
| 1024 | 2223 { |
| 2224 /* This function has been Mule-ized. */ | |
| 2225 int i; | |
| 2226 | |
| 1468 | 2227 for (i = 0; i < search_regs.num_regs; i++) |
| 2228 search_regs.start[i] = search_regs.end[i] = -1; | |
| 1024 | 2229 } |
| 2230 | |
| 428 | 2231 |
| 2232 /* Given a string of words separated by word delimiters, | |
| 442 | 2233 compute a regexp that matches those exact words |
| 2234 separated by arbitrary punctuation. */ | |
| 428 | 2235 |
| 2236 static Lisp_Object | |
| 2237 wordify (Lisp_Object buffer, Lisp_Object string) | |
| 2238 { | |
| 2239 Charcount i, len; | |
| 2240 EMACS_INT punct_count = 0, word_count = 0; | |
| 2241 struct buffer *buf = decode_buffer (buffer, 0); | |
| 826 | 2242 Lisp_Object syntax_table = buf->mirror_syntax_table; |
| 428 | 2243 |
| 2244 CHECK_STRING (string); | |
| 826 | 2245 len = string_char_length (string); |
| 428 | 2246 |
| 2247 for (i = 0; i < len; i++) | |
| 867 | 2248 if (!WORD_SYNTAX_P (syntax_table, string_ichar (string, i))) |
| 428 | 2249 { |
| 2250 punct_count++; | |
| 2251 if (i > 0 && WORD_SYNTAX_P (syntax_table, | |
| 867 | 2252 string_ichar (string, i - 1))) |
| 428 | 2253 word_count++; |
| 2254 } | |
| 867 | 2255 if (WORD_SYNTAX_P (syntax_table, string_ichar (string, len - 1))) |
| 428 | 2256 word_count++; |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4421
diff
changeset
|
2257 if (!word_count) return build_ascstring (""); |
| 428 | 2258 |
| 2259 { | |
| 2260 /* The following value is an upper bound on the amount of storage we | |
| 2261 need. In non-Mule, it is exact. */ | |
| 867 | 2262 Ibyte *storage = |
| 2367 | 2263 alloca_ibytes (XSTRING_LENGTH (string) - punct_count + |
| 428 | 2264 5 * (word_count - 1) + 4); |
| 867 | 2265 Ibyte *o = storage; |
| 428 | 2266 |
| 2267 *o++ = '\\'; | |
| 2268 *o++ = 'b'; | |
| 2269 | |
| 2270 for (i = 0; i < len; i++) | |
| 2271 { | |
| 867 | 2272 Ichar ch = string_ichar (string, i); |
| 428 | 2273 |
| 2274 if (WORD_SYNTAX_P (syntax_table, ch)) | |
| 867 | 2275 o += set_itext_ichar (o, ch); |
| 428 | 2276 else if (i > 0 |
| 2277 && WORD_SYNTAX_P (syntax_table, | |
| 867 | 2278 string_ichar (string, i - 1)) |
| 428 | 2279 && --word_count) |
| 2280 { | |
| 2281 *o++ = '\\'; | |
| 2282 *o++ = 'W'; | |
| 2283 *o++ = '\\'; | |
| 2284 *o++ = 'W'; | |
| 2285 *o++ = '*'; | |
| 2286 } | |
| 2287 } | |
| 2288 | |
| 2289 *o++ = '\\'; | |
| 2290 *o++ = 'b'; | |
| 2291 | |
| 2292 return make_string (storage, o - storage); | |
| 2293 } | |
| 2294 } | |
| 2295 | |
| 2296 DEFUN ("search-backward", Fsearch_backward, 1, 5, "sSearch backward: ", /* | |
| 2297 Search backward from point for STRING. | |
| 2298 Set point to the beginning of the occurrence found, and return point. | |
| 444 | 2299 |
| 2300 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2301 position. The match found must not extend before that position. | |
| 2302 The value nil is equivalent to (point-min). | |
| 2303 | |
| 2304 Optional third argument NOERROR, if t, means just return nil (no | |
| 2305 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2306 and return nil. | |
| 2307 | |
| 2308 Optional fourth argument COUNT is a repeat count--search for | |
| 2309 successive occurrences. | |
| 2310 | |
| 428 | 2311 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2312 defaults to the current buffer. |
| 2313 | |
| 1468 | 2314 When the match is successful, this function modifies the match data |
| 2315 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2316 match data with `match-data' and restore it with `store-match-data' if | |
| 2317 you want to preserve them. If the match fails, the match data from the | |
| 2318 previous success match is preserved. | |
| 2319 | |
| 2320 See also the function `replace-match'. | |
| 428 | 2321 */ |
| 444 | 2322 (string, limit, noerror, count, buffer)) |
| 428 | 2323 { |
| 444 | 2324 return search_command (string, limit, noerror, count, buffer, -1, 0, 0); |
| 428 | 2325 } |
| 2326 | |
| 2327 DEFUN ("search-forward", Fsearch_forward, 1, 5, "sSearch: ", /* | |
| 2328 Search forward from point for STRING. | |
| 2329 Set point to the end of the occurrence found, and return point. | |
| 444 | 2330 |
| 2331 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2332 position. The match found must not extend after that position. The | |
| 2333 value nil is equivalent to (point-max). | |
| 2334 | |
| 2335 Optional third argument NOERROR, if t, means just return nil (no | |
| 2336 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2337 and return nil. | |
| 2338 | |
| 2339 Optional fourth argument COUNT is a repeat count--search for | |
| 2340 successive occurrences. | |
| 2341 | |
| 428 | 2342 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2343 defaults to the current buffer. |
| 2344 | |
| 1468 | 2345 When the match is successful, this function modifies the match data |
| 2346 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2347 match data with `match-data' and restore it with `store-match-data' if | |
| 2348 you want to preserve them. If the match fails, the match data from the | |
| 2349 previous success match is preserved. | |
| 2350 | |
| 2351 See also the function `replace-match'. | |
| 428 | 2352 */ |
| 444 | 2353 (string, limit, noerror, count, buffer)) |
| 428 | 2354 { |
| 444 | 2355 return search_command (string, limit, noerror, count, buffer, 1, 0, 0); |
| 428 | 2356 } |
| 2357 | |
| 2358 DEFUN ("word-search-backward", Fword_search_backward, 1, 5, | |
| 2359 "sWord search backward: ", /* | |
| 2360 Search backward from point for STRING, ignoring differences in punctuation. | |
| 2361 Set point to the beginning of the occurrence found, and return point. | |
| 444 | 2362 |
| 2363 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2364 position. The match found must not extend before that position. | |
| 2365 The value nil is equivalent to (point-min). | |
| 2366 | |
| 2367 Optional third argument NOERROR, if t, means just return nil (no | |
| 2368 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2369 and return nil. | |
| 2370 | |
| 2371 Optional fourth argument COUNT is a repeat count--search for | |
| 2372 successive occurrences. | |
| 2373 | |
| 428 | 2374 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2375 defaults to the current buffer. |
| 2376 | |
| 1468 | 2377 When the match is successful, this function modifies the match data |
| 2378 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2379 match data with `match-data' and restore it with `store-match-data' if | |
| 2380 you want to preserve them. If the match fails, the match data from the | |
| 2381 previous success match is preserved. | |
| 2382 | |
| 2383 See also the function `replace-match'. | |
| 428 | 2384 */ |
| 444 | 2385 (string, limit, noerror, count, buffer)) |
| 428 | 2386 { |
| 444 | 2387 return search_command (wordify (buffer, string), limit, noerror, count, |
| 428 | 2388 buffer, -1, 1, 0); |
| 2389 } | |
| 2390 | |
| 2391 DEFUN ("word-search-forward", Fword_search_forward, 1, 5, "sWord search: ", /* | |
| 2392 Search forward from point for STRING, ignoring differences in punctuation. | |
| 2393 Set point to the end of the occurrence found, and return point. | |
| 444 | 2394 |
| 2395 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2396 position. The match found must not extend after that position. The | |
| 2397 value nil is equivalent to (point-max). | |
| 2398 | |
| 2399 Optional third argument NOERROR, if t, means just return nil (no | |
| 2400 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2401 and return nil. | |
| 2402 | |
| 2403 Optional fourth argument COUNT is a repeat count--search for | |
| 2404 successive occurrences. | |
| 2405 | |
| 428 | 2406 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2407 defaults to the current buffer. |
| 2408 | |
| 1468 | 2409 When the match is successful, this function modifies the match data |
| 2410 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2411 match data with `match-data' and restore it with `store-match-data' if | |
| 2412 you want to preserve them. If the match fails, the match data from the | |
| 2413 previous success match is preserved. | |
| 2414 | |
| 2415 See also the function `replace-match'. | |
| 428 | 2416 */ |
| 444 | 2417 (string, limit, noerror, count, buffer)) |
| 428 | 2418 { |
| 444 | 2419 return search_command (wordify (buffer, string), limit, noerror, count, |
| 428 | 2420 buffer, 1, 1, 0); |
| 2421 } | |
| 2422 | |
| 2423 DEFUN ("re-search-backward", Fre_search_backward, 1, 5, | |
| 2424 "sRE search backward: ", /* | |
| 2425 Search backward from point for match for regular expression REGEXP. | |
| 2426 Set point to the beginning of the match, and return point. | |
| 2427 The match found is the one starting last in the buffer | |
| 2428 and yet ending before the origin of the search. | |
| 444 | 2429 |
| 2430 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2431 position. The match found must not extend before that position. | |
| 2432 The value nil is equivalent to (point-min). | |
| 2433 | |
| 2434 Optional third argument NOERROR, if t, means just return nil (no | |
| 2435 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2436 and return nil. | |
| 2437 | |
| 2438 Optional fourth argument COUNT is a repeat count--search for | |
| 2439 successive occurrences. | |
| 2440 | |
| 428 | 2441 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2442 defaults to the current buffer. |
| 2443 | |
| 1468 | 2444 When the match is successful, this function modifies the match data |
| 2445 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2446 match data with `match-data' and restore it with `store-match-data' if | |
| 2447 you want to preserve them. If the match fails, the match data from the | |
| 2448 previous success match is preserved. | |
| 2449 | |
| 2450 See also the function `replace-match'. | |
| 428 | 2451 */ |
| 444 | 2452 (regexp, limit, noerror, count, buffer)) |
| 428 | 2453 { |
| 444 | 2454 return search_command (regexp, limit, noerror, count, buffer, -1, 1, 0); |
| 428 | 2455 } |
| 2456 | |
| 2457 DEFUN ("re-search-forward", Fre_search_forward, 1, 5, "sRE search: ", /* | |
| 2458 Search forward from point for regular expression REGEXP. | |
| 2459 Set point to the end of the occurrence found, and return point. | |
| 444 | 2460 |
| 2461 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2462 position. The match found must not extend after that position. The | |
| 2463 value nil is equivalent to (point-max). | |
| 2464 | |
| 2465 Optional third argument NOERROR, if t, means just return nil (no | |
| 2466 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2467 and return nil. | |
| 2468 | |
| 2469 Optional fourth argument COUNT is a repeat count--search for | |
| 2470 successive occurrences. | |
| 2471 | |
| 428 | 2472 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2473 defaults to the current buffer. |
| 2474 | |
| 1468 | 2475 When the match is successful, this function modifies the match data |
| 2476 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2477 match data with `match-data' and restore it with `store-match-data' if | |
| 2478 you want to preserve them. If the match fails, the match data from the | |
| 2479 previous success match is preserved. | |
| 2480 | |
| 2481 See also the function `replace-match'. | |
| 428 | 2482 */ |
| 444 | 2483 (regexp, limit, noerror, count, buffer)) |
| 428 | 2484 { |
| 444 | 2485 return search_command (regexp, limit, noerror, count, buffer, 1, 1, 0); |
| 428 | 2486 } |
| 2487 | |
| 2488 DEFUN ("posix-search-backward", Fposix_search_backward, 1, 5, | |
| 2489 "sPosix search backward: ", /* | |
| 2490 Search backward from point for match for regular expression REGEXP. | |
| 2491 Find the longest match in accord with Posix regular expression rules. | |
| 2492 Set point to the beginning of the match, and return point. | |
| 2493 The match found is the one starting last in the buffer | |
| 2494 and yet ending before the origin of the search. | |
| 444 | 2495 |
| 2496 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2497 position. The match found must not extend before that position. | |
| 2498 The value nil is equivalent to (point-min). | |
| 2499 | |
| 2500 Optional third argument NOERROR, if t, means just return nil (no | |
| 2501 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2502 and return nil. | |
| 2503 | |
| 2504 Optional fourth argument COUNT is a repeat count--search for | |
| 2505 successive occurrences. | |
| 2506 | |
| 428 | 2507 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2508 defaults to the current buffer. |
| 2509 | |
| 1468 | 2510 When the match is successful, this function modifies the match data |
| 2511 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2512 match data with `match-data' and restore it with `store-match-data' if | |
| 2513 you want to preserve them. If the match fails, the match data from the | |
| 2514 previous success match is preserved. | |
| 2515 | |
| 2516 See also the function `replace-match'. | |
| 428 | 2517 */ |
| 444 | 2518 (regexp, limit, noerror, count, buffer)) |
| 428 | 2519 { |
| 444 | 2520 return search_command (regexp, limit, noerror, count, buffer, -1, 1, 1); |
| 428 | 2521 } |
| 2522 | |
| 2523 DEFUN ("posix-search-forward", Fposix_search_forward, 1, 5, "sPosix search: ", /* | |
| 2524 Search forward from point for regular expression REGEXP. | |
| 2525 Find the longest match in accord with Posix regular expression rules. | |
| 2526 Set point to the end of the occurrence found, and return point. | |
| 444 | 2527 |
| 2528 Optional second argument LIMIT bounds the search; it is a buffer | |
| 2529 position. The match found must not extend after that position. The | |
| 2530 value nil is equivalent to (point-max). | |
| 2531 | |
| 2532 Optional third argument NOERROR, if t, means just return nil (no | |
| 2533 error) if the search fails. If neither nil nor t, set point to LIMIT | |
| 2534 and return nil. | |
| 2535 | |
| 2536 Optional fourth argument COUNT is a repeat count--search for | |
| 2537 successive occurrences. | |
| 2538 | |
| 428 | 2539 Optional fifth argument BUFFER specifies the buffer to search in and |
| 444 | 2540 defaults to the current buffer. |
| 2541 | |
| 1468 | 2542 When the match is successful, this function modifies the match data |
| 2543 that `match-beginning', `match-end' and `match-data' access; save the | |
| 2544 match data with `match-data' and restore it with `store-match-data' if | |
| 2545 you want to preserve them. If the match fails, the match data from the | |
| 2546 previous success match is preserved. | |
| 2547 | |
| 2548 See also the function `replace-match'. | |
| 428 | 2549 */ |
| 444 | 2550 (regexp, limit, noerror, count, buffer)) |
| 428 | 2551 { |
| 444 | 2552 return search_command (regexp, limit, noerror, count, buffer, 1, 1, 1); |
| 428 | 2553 } |
| 2554 | |
| 2555 | |
| 2556 static Lisp_Object | |
| 2557 free_created_dynarrs (Lisp_Object cons) | |
| 2558 { | |
| 2559 Dynarr_free (get_opaque_ptr (XCAR (cons))); | |
| 2560 Dynarr_free (get_opaque_ptr (XCDR (cons))); | |
| 2561 free_opaque_ptr (XCAR (cons)); | |
| 2562 free_opaque_ptr (XCDR (cons)); | |
| 853 | 2563 free_cons (cons); |
| 428 | 2564 return Qnil; |
| 2565 } | |
| 2566 | |
| 2567 DEFUN ("replace-match", Freplace_match, 1, 5, 0, /* | |
| 444 | 2568 Replace text matched by last search with REPLACEMENT. |
| 4199 | 2569 Leaves point at end of replacement text. |
| 2570 Optional boolean FIXEDCASE inhibits matching case of REPLACEMENT to source. | |
| 2571 Optional boolean LITERAL inhibits interpretation of escape sequences. | |
| 2572 Optional STRING provides the source text to replace. | |
| 2573 Optional STRBUFFER may be a buffer, providing match context, or an integer | |
| 2574 specifying the subexpression to replace. | |
| 2575 | |
| 2576 If FIXEDCASE is non-nil, do not alter case of replacement text. | |
| 428 | 2577 Otherwise maybe capitalize the whole text, or maybe just word initials, |
| 2578 based on the replaced text. | |
| 4199 | 2579 If the replaced text has only capital letters and has at least one |
| 2580 multiletter word, convert REPLACEMENT to all caps. | |
| 428 | 2581 If the replaced text has at least one word starting with a capital letter, |
| 444 | 2582 then capitalize each word in REPLACEMENT. |
| 428 | 2583 |
| 4199 | 2584 If LITERAL is non-nil, insert REPLACEMENT literally. |
| 428 | 2585 Otherwise treat `\\' as special: |
| 444 | 2586 `\\&' in REPLACEMENT means substitute original matched text. |
| 428 | 2587 `\\N' means substitute what matched the Nth `\\(...\\)'. |
| 2588 If Nth parens didn't match, substitute nothing. | |
| 2589 `\\\\' means insert one `\\'. | |
| 2590 `\\u' means upcase the next character. | |
| 2591 `\\l' means downcase the next character. | |
| 2592 `\\U' means begin upcasing all following characters. | |
| 2593 `\\L' means begin downcasing all following characters. | |
| 2594 `\\E' means terminate the effect of any `\\U' or `\\L'. | |
| 2595 Case changes made with `\\u', `\\l', `\\U', and `\\L' override | |
| 2596 all other case changes that may be made in the replaced text. | |
| 4199 | 2597 |
| 2598 If non-nil, STRING is the source string, and a new string with the specified | |
| 2599 replacements is created and returned. Otherwise the current buffer is the | |
| 2600 source text. | |
| 2601 | |
| 2602 If non-nil, STRBUFFER may be an integer, interpreted as the index of the | |
| 2603 subexpression to replace in the source text, or a buffer to provide the | |
| 2604 syntax table and case table. If nil, then the \"subexpression\" is 0, i.e., | |
| 2605 the whole match, and the current buffer provides the syntax and case tables. | |
| 2606 If STRING is nil, STRBUFFER must be nil or an integer. | |
| 2607 | |
| 2608 Specifying a subexpression is only useful after a regular expression match, | |
| 2609 since a fixed string search has no non-trivial subexpressions. | |
| 2610 | |
| 2611 It is not possible to specify both a buffer and a subexpression. If that is | |
| 2612 desired, the idiom `(with-current-buffer BUFFER (replace-match ... INTEGER))' | |
| 2613 may be appropriate. | |
| 2614 | |
| 2615 If STRING is nil but the last thing matched (or searched) was a string, or | |
| 2616 STRING is a string but the last thing matched was a buffer, an | |
| 2617 `invalid-argument' error will be signaled. (XEmacs does not check that the | |
| 2618 last thing searched is the source string, but it is not useful to use a | |
| 2619 different string as source.) | |
| 2620 | |
| 2621 If no match (including searches) has been successful or the requested | |
| 1468 | 2622 subexpression was not matched, an `args-out-of-range' error will be |
| 2623 signaled. (If no match has ever been conducted in this instance of | |
| 2624 XEmacs, an `invalid-operation' error will be signaled. This is very | |
| 2625 rare.) | |
| 428 | 2626 */ |
| 444 | 2627 (replacement, fixedcase, literal, string, strbuffer)) |
| 428 | 2628 { |
| 2629 /* This function can GC */ | |
| 2630 enum { nochange, all_caps, cap_initial } case_action; | |
| 665 | 2631 Charbpos pos, last; |
| 428 | 2632 int some_multiletter_word; |
| 2633 int some_lowercase; | |
| 2634 int some_uppercase; | |
| 2635 int some_nonuppercase_initial; | |
| 867 | 2636 Ichar c, prevc; |
| 428 | 2637 Charcount inslen; |
| 2638 struct buffer *buf; | |
| 826 | 2639 Lisp_Object syntax_table; |
| 428 | 2640 int mc_count; |
| 2641 Lisp_Object buffer; | |
| 2642 int_dynarr *ul_action_dynarr = 0; | |
| 2643 int_dynarr *ul_pos_dynarr = 0; | |
| 502 | 2644 int sub = 0; |
| 428 | 2645 int speccount; |
| 2646 | |
| 444 | 2647 CHECK_STRING (replacement); |
| 428 | 2648 |
| 4199 | 2649 /* Because GNU decided to be incompatible here, we support the following |
| 2650 baroque and bogus API for the STRING and STRBUFFER arguments: | |
| 2651 types interpretations | |
| 2652 STRING STRBUFFER STRING STRBUFFER | |
| 2653 nil nil none 0 = index of subexpression to replace | |
| 2654 nil integer none index of subexpression to replace | |
| 2655 nil other ***** error ***** | |
| 2656 string nil source current buffer provides syntax table | |
| 2657 subexpression = 0 (whole match) | |
| 2658 string buffer source buffer providing syntax table | |
| 2659 subexpression = 0 (whole match) | |
| 2660 string integer source current buffer provides syntax table | |
| 2661 subexpression = STRBUFFER | |
| 2662 string other ***** error ***** | |
| 2663 */ | |
| 2664 | |
| 2665 /* Do STRBUFFER first; if STRING is nil, we'll overwrite BUF and BUFFER. */ | |
| 2666 | |
| 2667 /* If the match data were abstracted into a special "match data" type | |
| 2668 instead of the typical half-assed "let the implementation be visible" | |
| 2669 form it's in, we could extend it to include the last string matched | |
| 2670 and the buffer used for that matching. But of course we can't change | |
| 2671 it as it is. | |
| 2672 */ | |
| 2673 if (NILP (strbuffer) || BUFFERP (strbuffer)) | |
| 2674 { | |
| 2675 buf = decode_buffer (strbuffer, 0); | |
| 2676 } | |
| 2677 else if (!NILP (strbuffer)) | |
| 2678 { | |
| 2679 CHECK_INT (strbuffer); | |
| 2680 sub = XINT (strbuffer); | |
| 2681 if (sub < 0 || sub >= (int) search_regs.num_regs) | |
| 2682 invalid_argument ("match data register invalid", strbuffer); | |
| 2683 if (search_regs.start[sub] < 0) | |
| 2684 invalid_argument ("match data register not set", strbuffer); | |
| 2685 buf = current_buffer; | |
| 2686 } | |
| 2687 else | |
| 2688 invalid_argument ("STRBUFFER must be nil, a buffer, or an integer", | |
| 2689 strbuffer); | |
| 2690 buffer = wrap_buffer (buf); | |
| 2691 | |
| 428 | 2692 if (! NILP (string)) |
| 2693 { | |
| 2694 CHECK_STRING (string); | |
| 2695 if (!EQ (last_thing_searched, Qt)) | |
| 4199 | 2696 invalid_argument ("last thing matched was not a string", Qunbound); |
| 428 | 2697 } |
| 2698 else | |
| 2699 { | |
| 2700 if (!BUFFERP (last_thing_searched)) | |
| 4199 | 2701 invalid_argument ("last thing matched was not a buffer", Qunbound); |
| 428 | 2702 buffer = last_thing_searched; |
| 2703 buf = XBUFFER (buffer); | |
| 2704 } | |
| 2705 | |
| 826 | 2706 syntax_table = buf->mirror_syntax_table; |
| 428 | 2707 |
| 2708 case_action = nochange; /* We tried an initialization */ | |
| 2709 /* but some C compilers blew it */ | |
| 2710 | |
| 2711 if (search_regs.num_regs == 0) | |
| 826 | 2712 signal_error (Qinvalid_operation, |
| 2713 "replace-match called before any match found", Qunbound); | |
| 428 | 2714 |
| 2715 if (NILP (string)) | |
| 2716 { | |
| 469 | 2717 if (search_regs.start[sub] < BUF_BEGV (buf) |
| 2718 || search_regs.start[sub] > search_regs.end[sub] | |
| 2719 || search_regs.end[sub] > BUF_ZV (buf)) | |
| 2720 args_out_of_range (make_int (search_regs.start[sub]), | |
| 2721 make_int (search_regs.end[sub])); | |
| 428 | 2722 } |
| 2723 else | |
| 2724 { | |
| 2725 if (search_regs.start[0] < 0 | |
| 2726 || search_regs.start[0] > search_regs.end[0] | |
| 826 | 2727 || search_regs.end[0] > string_char_length (string)) |
| 428 | 2728 args_out_of_range (make_int (search_regs.start[0]), |
| 2729 make_int (search_regs.end[0])); | |
| 2730 } | |
| 2731 | |
| 2732 if (NILP (fixedcase)) | |
| 2733 { | |
| 2734 /* Decide how to casify by examining the matched text. */ | |
| 2735 | |
| 707 | 2736 last = search_regs.end[sub]; |
| 428 | 2737 prevc = '\n'; |
| 2738 case_action = all_caps; | |
| 2739 | |
| 2740 /* some_multiletter_word is set nonzero if any original word | |
| 2741 is more than one letter long. */ | |
| 2742 some_multiletter_word = 0; | |
| 2743 some_lowercase = 0; | |
| 2744 some_nonuppercase_initial = 0; | |
| 2745 some_uppercase = 0; | |
| 2746 | |
| 707 | 2747 for (pos = search_regs.start[sub]; pos < last; pos++) |
| 428 | 2748 { |
| 2749 if (NILP (string)) | |
| 2750 c = BUF_FETCH_CHAR (buf, pos); | |
| 2751 else | |
| 867 | 2752 c = string_ichar (string, pos); |
| 428 | 2753 |
| 2754 if (LOWERCASEP (buf, c)) | |
| 2755 { | |
| 2756 /* Cannot be all caps if any original char is lower case */ | |
| 2757 | |
| 2758 some_lowercase = 1; | |
| 2759 if (!WORD_SYNTAX_P (syntax_table, prevc)) | |
| 2760 some_nonuppercase_initial = 1; | |
| 2761 else | |
| 2762 some_multiletter_word = 1; | |
| 2763 } | |
| 2764 else if (!NOCASEP (buf, c)) | |
| 2765 { | |
| 2766 some_uppercase = 1; | |
| 2767 if (!WORD_SYNTAX_P (syntax_table, prevc)) | |
| 2768 ; | |
| 2769 else | |
| 2770 some_multiletter_word = 1; | |
| 2771 } | |
| 2772 else | |
| 2773 { | |
| 2774 /* If the initial is a caseless word constituent, | |
| 2775 treat that like a lowercase initial. */ | |
| 2776 if (!WORD_SYNTAX_P (syntax_table, prevc)) | |
| 2777 some_nonuppercase_initial = 1; | |
| 2778 } | |
| 2779 | |
| 2780 prevc = c; | |
| 2781 } | |
| 2782 | |
| 2783 /* Convert to all caps if the old text is all caps | |
| 2784 and has at least one multiletter word. */ | |
| 2785 if (! some_lowercase && some_multiletter_word) | |
| 2786 case_action = all_caps; | |
| 2787 /* Capitalize each word, if the old text has all capitalized words. */ | |
| 2788 else if (!some_nonuppercase_initial && some_multiletter_word) | |
| 2789 case_action = cap_initial; | |
| 2790 else if (!some_nonuppercase_initial && some_uppercase) | |
| 2791 /* Should x -> yz, operating on X, give Yz or YZ? | |
| 2792 We'll assume the latter. */ | |
| 2793 case_action = all_caps; | |
| 2794 else | |
| 2795 case_action = nochange; | |
| 2796 } | |
| 2797 | |
| 2798 /* Do replacement in a string. */ | |
| 2799 if (!NILP (string)) | |
| 2800 { | |
| 2801 Lisp_Object before, after; | |
| 2802 | |
| 2803 speccount = specpdl_depth (); | |
|
5089
99f8ebc082d9
Make #'substring an alias of #'subseq; give the latter the byte code.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2804 before = Fsubseq (string, Qzero, make_int (search_regs.start[sub])); |
|
99f8ebc082d9
Make #'substring an alias of #'subseq; give the latter the byte code.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2805 after = Fsubseq (string, make_int (search_regs.end[sub]), Qnil); |
| 428 | 2806 |
| 444 | 2807 /* Do case substitution into REPLACEMENT if desired. */ |
| 428 | 2808 if (NILP (literal)) |
| 2809 { | |
| 826 | 2810 Charcount stlen = string_char_length (replacement); |
| 428 | 2811 Charcount strpos; |
| 2812 /* XEmacs change: rewrote this loop somewhat to make it | |
| 2813 cleaner. Also added \U, \E, etc. */ | |
| 2814 Charcount literal_start = 0; | |
| 2815 /* We build up the substituted string in ACCUM. */ | |
| 2816 Lisp_Object accum; | |
| 2817 | |
| 2818 accum = Qnil; | |
| 2819 | |
| 2820 /* OK, the basic idea here is that we scan through the | |
| 2821 replacement string until we find a backslash, which | |
| 2822 represents a substring of the original string to be | |
| 2823 substituted. We then append onto ACCUM the literal | |
| 2824 text before the backslash (LASTPOS marks the | |
| 2825 beginning of this) followed by the substring of the | |
| 2826 original string that needs to be inserted. */ | |
| 2827 for (strpos = 0; strpos < stlen; strpos++) | |
| 2828 { | |
| 2829 /* If LITERAL_END is set, we've encountered a backslash | |
| 2830 (the end of literal text to be inserted). */ | |
| 2831 Charcount literal_end = -1; | |
| 2832 /* If SUBSTART is set, we need to also insert the | |
| 2833 text from SUBSTART to SUBEND in the original string. */ | |
| 2834 Charcount substart = -1; | |
| 2835 Charcount subend = -1; | |
| 2836 | |
| 867 | 2837 c = string_ichar (replacement, strpos); |
| 428 | 2838 if (c == '\\' && strpos < stlen - 1) |
| 2839 { | |
| 867 | 2840 c = string_ichar (replacement, ++strpos); |
| 428 | 2841 if (c == '&') |
| 2842 { | |
| 2843 literal_end = strpos - 1; | |
| 2844 substart = search_regs.start[0]; | |
| 2845 subend = search_regs.end[0]; | |
| 2846 } | |
| 4199 | 2847 /* #### This logic is totally broken, |
| 2848 since we can have backrefs like "\99", right? */ | |
| 428 | 2849 else if (c >= '1' && c <= '9' && |
| 2850 c <= search_regs.num_regs + '0') | |
| 2851 { | |
| 2852 if (search_regs.start[c - '0'] >= 0) | |
| 2853 { | |
| 2854 literal_end = strpos - 1; | |
| 2855 substart = search_regs.start[c - '0']; | |
| 2856 subend = search_regs.end[c - '0']; | |
| 2857 } | |
| 2858 } | |
| 2859 else if (c == 'U' || c == 'u' || c == 'L' || c == 'l' || | |
| 2860 c == 'E') | |
| 2861 { | |
| 2862 /* Keep track of all case changes requested, but don't | |
| 2863 make them now. Do them later so we override | |
| 2864 everything else. */ | |
| 2865 if (!ul_pos_dynarr) | |
| 2866 { | |
| 2867 ul_pos_dynarr = Dynarr_new (int); | |
| 2868 ul_action_dynarr = Dynarr_new (int); | |
| 2869 record_unwind_protect | |
| 2870 (free_created_dynarrs, | |
| 2871 noseeum_cons | |
| 2872 (make_opaque_ptr (ul_pos_dynarr), | |
| 2873 make_opaque_ptr (ul_action_dynarr))); | |
| 2874 } | |
| 2875 literal_end = strpos - 1; | |
| 2876 Dynarr_add (ul_pos_dynarr, | |
| 2877 (!NILP (accum) | |
| 826 | 2878 ? string_char_length (accum) |
| 428 | 2879 : 0) + (literal_end - literal_start)); |
| 2880 Dynarr_add (ul_action_dynarr, c); | |
| 2881 } | |
| 2882 else if (c == '\\') | |
| 2883 /* So we get just one backslash. */ | |
| 2884 literal_end = strpos; | |
| 2885 } | |
| 2886 if (literal_end >= 0) | |
| 2887 { | |
| 2888 Lisp_Object literal_text = Qnil; | |
| 2889 Lisp_Object substring = Qnil; | |
| 2890 if (literal_end != literal_start) | |
|
5089
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2891 literal_text = Fsubseq (replacement, |
|
99f8ebc082d9
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2892 make_int (literal_start), |
|
99f8ebc082d9
Make #'substring an alias of #'subseq; give the latter the byte code.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2893 make_int (literal_end)); |
| 428 | 2894 if (substart >= 0 && subend != substart) |
|
5089
99f8ebc082d9
Make #'substring an alias of #'subseq; give the latter the byte code.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2895 substring = Fsubseq (string, make_int (substart), |
|
99f8ebc082d9
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2896 make_int (subend)); |
| 428 | 2897 if (!NILP (literal_text) || !NILP (substring)) |
| 2898 accum = concat3 (accum, literal_text, substring); | |
| 2899 literal_start = strpos + 1; | |
| 2900 } | |
| 2901 } | |
| 2902 | |
| 2903 if (strpos != literal_start) | |
| 2904 /* some literal text at end to be inserted */ | |
|
5089
99f8ebc082d9
Make #'substring an alias of #'subseq; give the latter the byte code.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2905 replacement = concat2 (accum, Fsubseq (replacement, |
|
99f8ebc082d9
Make #'substring an alias of #'subseq; give the latter the byte code.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2906 make_int (literal_start), |
|
99f8ebc082d9
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Aidan Kehoe <kehoea@parhasard.net>
parents:
5041
diff
changeset
|
2907 make_int (strpos))); |
| 428 | 2908 else |
| 444 | 2909 replacement = accum; |
| 428 | 2910 } |
| 2911 | |
| 444 | 2912 /* replacement can be nil. */ |
| 2913 if (NILP (replacement)) | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4421
diff
changeset
|
2914 replacement = build_ascstring (""); |
| 444 | 2915 |
| 428 | 2916 if (case_action == all_caps) |
| 444 | 2917 replacement = Fupcase (replacement, buffer); |
| 428 | 2918 else if (case_action == cap_initial) |
| 444 | 2919 replacement = Fupcase_initials (replacement, buffer); |
| 428 | 2920 |
| 2921 /* Now finally, we need to process the \U's, \E's, etc. */ | |
| 2922 if (ul_pos_dynarr) | |
| 2923 { | |
| 2924 int i = 0; | |
| 2925 int cur_action = 'E'; | |
| 826 | 2926 Charcount stlen = string_char_length (replacement); |
| 428 | 2927 Charcount strpos; |
| 2928 | |
| 2929 for (strpos = 0; strpos < stlen; strpos++) | |
| 2930 { | |
| 867 | 2931 Ichar curchar = string_ichar (replacement, strpos); |
| 2932 Ichar newchar = -1; | |
| 428 | 2933 if (i < Dynarr_length (ul_pos_dynarr) && |
| 2934 strpos == Dynarr_at (ul_pos_dynarr, i)) | |
| 2935 { | |
| 2936 int new_action = Dynarr_at (ul_action_dynarr, i); | |
| 2937 i++; | |
| 2938 if (new_action == 'u') | |
| 2939 newchar = UPCASE (buf, curchar); | |
| 2940 else if (new_action == 'l') | |
| 2941 newchar = DOWNCASE (buf, curchar); | |
| 2942 else | |
| 2943 cur_action = new_action; | |
| 2944 } | |
| 2945 if (newchar == -1) | |
| 2946 { | |
| 2947 if (cur_action == 'U') | |
| 2948 newchar = UPCASE (buf, curchar); | |
| 2949 else if (cur_action == 'L') | |
| 2950 newchar = DOWNCASE (buf, curchar); | |
| 2951 else | |
| 2952 newchar = curchar; | |
| 2953 } | |
| 2954 if (newchar != curchar) | |
| 793 | 2955 set_string_char (replacement, strpos, newchar); |
| 428 | 2956 } |
| 2957 } | |
| 2958 | |
| 2959 /* frees the Dynarrs if necessary. */ | |
| 771 | 2960 unbind_to (speccount); |
| 444 | 2961 return concat3 (before, replacement, after); |
| 428 | 2962 } |
| 2963 | |
| 707 | 2964 mc_count = begin_multiple_change (buf, search_regs.start[sub], |
| 2965 search_regs.end[sub]); | |
| 428 | 2966 |
| 2967 /* begin_multiple_change() records an unwind-protect, so we need to | |
| 2968 record this value now. */ | |
| 2969 speccount = specpdl_depth (); | |
| 2970 | |
| 2971 /* We insert the replacement text before the old text, and then | |
| 2972 delete the original text. This means that markers at the | |
| 2973 beginning or end of the original will float to the corresponding | |
| 2974 position in the replacement. */ | |
| 707 | 2975 BUF_SET_PT (buf, search_regs.start[sub]); |
| 428 | 2976 if (!NILP (literal)) |
| 444 | 2977 Finsert (1, &replacement); |
| 428 | 2978 else |
| 2979 { | |
| 826 | 2980 Charcount stlen = string_char_length (replacement); |
| 428 | 2981 Charcount strpos; |
| 2982 struct gcpro gcpro1; | |
| 444 | 2983 GCPRO1 (replacement); |
| 428 | 2984 for (strpos = 0; strpos < stlen; strpos++) |
| 2985 { | |
| 707 | 2986 /* on the first iteration assert(offset==0), |
| 2987 exactly complementing BUF_SET_PT() above. | |
| 2988 During the loop, it keeps track of the amount inserted. | |
| 2989 */ | |
| 2990 Charcount offset = BUF_PT (buf) - search_regs.start[sub]; | |
| 428 | 2991 |
| 867 | 2992 c = string_ichar (replacement, strpos); |
| 428 | 2993 if (c == '\\' && strpos < stlen - 1) |
| 2994 { | |
| 707 | 2995 /* XXX FIXME: replacing just a substring non-literally |
| 2996 using backslash refs to the match looks dangerous. But | |
| 2997 <15366.18513.698042.156573@ns.caldera.de> from Torsten Duwe | |
| 2998 <duwe@caldera.de> claims Finsert_buffer_substring already | |
| 2999 handles this correctly. | |
| 3000 */ | |
| 867 | 3001 c = string_ichar (replacement, ++strpos); |
| 428 | 3002 if (c == '&') |
| 3003 Finsert_buffer_substring | |
| 3004 (buffer, | |
| 3005 make_int (search_regs.start[0] + offset), | |
| 3006 make_int (search_regs.end[0] + offset)); | |
| 4199 | 3007 /* #### This logic is totally broken, |
| 3008 since we can have backrefs like "\99", right? */ | |
| 428 | 3009 else if (c >= '1' && c <= '9' && |
| 3010 c <= search_regs.num_regs + '0') | |
| 3011 { | |
| 3012 if (search_regs.start[c - '0'] >= 1) | |
| 3013 Finsert_buffer_substring | |
| 3014 (buffer, | |
| 3015 make_int (search_regs.start[c - '0'] + offset), | |
| 3016 make_int (search_regs.end[c - '0'] + offset)); | |
| 3017 } | |
| 3018 else if (c == 'U' || c == 'u' || c == 'L' || c == 'l' || | |
| 3019 c == 'E') | |
| 3020 { | |
| 3021 /* Keep track of all case changes requested, but don't | |
| 3022 make them now. Do them later so we override | |
| 3023 everything else. */ | |
| 3024 if (!ul_pos_dynarr) | |
| 3025 { | |
| 3026 ul_pos_dynarr = Dynarr_new (int); | |
| 3027 ul_action_dynarr = Dynarr_new (int); | |
| 3028 record_unwind_protect | |
| 3029 (free_created_dynarrs, | |
| 3030 Fcons (make_opaque_ptr (ul_pos_dynarr), | |
| 3031 make_opaque_ptr (ul_action_dynarr))); | |
| 3032 } | |
| 3033 Dynarr_add (ul_pos_dynarr, BUF_PT (buf)); | |
| 3034 Dynarr_add (ul_action_dynarr, c); | |
| 3035 } | |
| 3036 else | |
| 3037 buffer_insert_emacs_char (buf, c); | |
| 3038 } | |
| 3039 else | |
| 3040 buffer_insert_emacs_char (buf, c); | |
| 3041 } | |
| 3042 UNGCPRO; | |
| 3043 } | |
| 3044 | |
| 707 | 3045 inslen = BUF_PT (buf) - (search_regs.start[sub]); |
| 3046 buffer_delete_range (buf, search_regs.start[sub] + inslen, | |
| 3047 search_regs.end[sub] + inslen, 0); | |
| 428 | 3048 |
| 3049 if (case_action == all_caps) | |
| 3050 Fupcase_region (make_int (BUF_PT (buf) - inslen), | |
| 3051 make_int (BUF_PT (buf)), buffer); | |
| 3052 else if (case_action == cap_initial) | |
| 3053 Fupcase_initials_region (make_int (BUF_PT (buf) - inslen), | |
| 3054 make_int (BUF_PT (buf)), buffer); | |
| 3055 | |
| 3056 /* Now go through and make all the case changes that were requested | |
| 3057 in the replacement string. */ | |
| 3058 if (ul_pos_dynarr) | |
| 3059 { | |
| 665 | 3060 Charbpos eend = BUF_PT (buf); |
| 428 | 3061 int i = 0; |
| 3062 int cur_action = 'E'; | |
| 3063 | |
| 3064 for (pos = BUF_PT (buf) - inslen; pos < eend; pos++) | |
| 3065 { | |
| 867 | 3066 Ichar curchar = BUF_FETCH_CHAR (buf, pos); |
| 3067 Ichar newchar = -1; | |
| 428 | 3068 if (i < Dynarr_length (ul_pos_dynarr) && |
| 3069 pos == Dynarr_at (ul_pos_dynarr, i)) | |
| 3070 { | |
| 3071 int new_action = Dynarr_at (ul_action_dynarr, i); | |
| 3072 i++; | |
| 3073 if (new_action == 'u') | |
| 3074 newchar = UPCASE (buf, curchar); | |
| 3075 else if (new_action == 'l') | |
| 3076 newchar = DOWNCASE (buf, curchar); | |
| 3077 else | |
| 3078 cur_action = new_action; | |
| 3079 } | |
| 3080 if (newchar == -1) | |
| 3081 { | |
| 3082 if (cur_action == 'U') | |
| 3083 newchar = UPCASE (buf, curchar); | |
| 3084 else if (cur_action == 'L') | |
| 3085 newchar = DOWNCASE (buf, curchar); | |
| 3086 else | |
| 3087 newchar = curchar; | |
| 3088 } | |
| 3089 if (newchar != curchar) | |
| 3090 buffer_replace_char (buf, pos, newchar, 0, 0); | |
| 3091 } | |
| 3092 } | |
| 3093 | |
| 3094 /* frees the Dynarrs if necessary. */ | |
| 771 | 3095 unbind_to (speccount); |
| 428 | 3096 end_multiple_change (buf, mc_count); |
| 3097 | |
| 3098 return Qnil; | |
| 3099 } | |
| 3100 | |
| 3101 static Lisp_Object | |
| 3102 match_limit (Lisp_Object num, int beginningp) | |
| 3103 { | |
| 3104 int n; | |
| 3105 | |
| 3106 CHECK_INT (num); | |
| 3107 n = XINT (num); | |
| 3108 if (n < 0 || n >= search_regs.num_regs) | |
| 3109 args_out_of_range (num, make_int (search_regs.num_regs)); | |
| 3110 if (search_regs.num_regs == 0 || | |
| 3111 search_regs.start[n] < 0) | |
| 3112 return Qnil; | |
| 3113 return make_int (beginningp ? search_regs.start[n] : search_regs.end[n]); | |
| 3114 } | |
| 3115 | |
| 3116 DEFUN ("match-beginning", Fmatch_beginning, 1, 1, 0, /* | |
| 3117 Return position of start of text matched by last regexp search. | |
| 3118 NUM, specifies which parenthesized expression in the last regexp. | |
| 3119 Value is nil if NUMth pair didn't match, or there were less than NUM pairs. | |
| 3120 Zero means the entire text matched by the whole regexp or whole string. | |
| 3121 */ | |
| 3122 (num)) | |
| 3123 { | |
| 3124 return match_limit (num, 1); | |
| 3125 } | |
| 3126 | |
| 3127 DEFUN ("match-end", Fmatch_end, 1, 1, 0, /* | |
| 3128 Return position of end of text matched by last regexp search. | |
| 3129 NUM specifies which parenthesized expression in the last regexp. | |
| 3130 Value is nil if NUMth pair didn't match, or there were less than NUM pairs. | |
| 3131 Zero means the entire text matched by the whole regexp or whole string. | |
| 3132 */ | |
| 3133 (num)) | |
| 3134 { | |
| 3135 return match_limit (num, 0); | |
| 3136 } | |
| 3137 | |
| 3138 DEFUN ("match-data", Fmatch_data, 0, 2, 0, /* | |
| 3139 Return a list containing all info on what the last regexp search matched. | |
| 3140 Element 2N is `(match-beginning N)'; element 2N + 1 is `(match-end N)'. | |
| 3141 All the elements are markers or nil (nil if the Nth pair didn't match) | |
| 3142 if the last match was on a buffer; integers or nil if a string was matched. | |
| 3143 Use `store-match-data' to reinstate the data in this list. | |
| 3144 | |
| 3145 If INTEGERS (the optional first argument) is non-nil, always use integers | |
| 3146 \(rather than markers) to represent buffer positions. | |
| 3147 If REUSE is a list, reuse it as part of the value. If REUSE is long enough | |
| 3148 to hold all the values, and if INTEGERS is non-nil, no consing is done. | |
| 3149 */ | |
| 3150 (integers, reuse)) | |
| 3151 { | |
| 3152 Lisp_Object tail, prev; | |
| 3153 Lisp_Object *data; | |
| 3154 int i; | |
| 3155 Charcount len; | |
| 3156 | |
| 3157 if (NILP (last_thing_searched)) | |
| 563 | 3158 /*error ("match-data called before any match found", Qunbound);*/ |
| 428 | 3159 return Qnil; |
| 3160 | |
| 3161 data = alloca_array (Lisp_Object, 2 * search_regs.num_regs); | |
| 3162 | |
| 3163 len = -1; | |
| 3164 for (i = 0; i < search_regs.num_regs; i++) | |
| 3165 { | |
| 665 | 3166 Charbpos start = search_regs.start[i]; |
| 428 | 3167 if (start >= 0) |
| 3168 { | |
| 3169 if (EQ (last_thing_searched, Qt) | |
| 3170 || !NILP (integers)) | |
| 3171 { | |
| 3172 data[2 * i] = make_int (start); | |
| 3173 data[2 * i + 1] = make_int (search_regs.end[i]); | |
| 3174 } | |
| 3175 else if (BUFFERP (last_thing_searched)) | |
| 3176 { | |
| 3177 data[2 * i] = Fmake_marker (); | |
| 3178 Fset_marker (data[2 * i], | |
| 3179 make_int (start), | |
| 3180 last_thing_searched); | |
| 3181 data[2 * i + 1] = Fmake_marker (); | |
| 3182 Fset_marker (data[2 * i + 1], | |
| 3183 make_int (search_regs.end[i]), | |
| 3184 last_thing_searched); | |
| 3185 } | |
| 3186 else | |
| 3187 /* last_thing_searched must always be Qt, a buffer, or Qnil. */ | |
| 2500 | 3188 ABORT (); |
| 428 | 3189 |
| 3190 len = i; | |
| 3191 } | |
| 3192 else | |
| 3193 data[2 * i] = data [2 * i + 1] = Qnil; | |
| 3194 } | |
| 3195 if (!CONSP (reuse)) | |
| 3196 return Flist (2 * len + 2, data); | |
| 3197 | |
| 3198 /* If REUSE is a list, store as many value elements as will fit | |
| 3199 into the elements of REUSE. */ | |
| 3200 for (prev = Qnil, i = 0, tail = reuse; CONSP (tail); i++, tail = XCDR (tail)) | |
| 3201 { | |
| 3202 if (i < 2 * len + 2) | |
| 3203 XCAR (tail) = data[i]; | |
| 3204 else | |
| 3205 XCAR (tail) = Qnil; | |
| 3206 prev = tail; | |
| 3207 } | |
| 3208 | |
| 3209 /* If we couldn't fit all value elements into REUSE, | |
| 3210 cons up the rest of them and add them to the end of REUSE. */ | |
| 3211 if (i < 2 * len + 2) | |
| 3212 XCDR (prev) = Flist (2 * len + 2 - i, data + i); | |
| 3213 | |
| 3214 return reuse; | |
| 3215 } | |
| 3216 | |
| 3217 | |
| 3218 DEFUN ("store-match-data", Fstore_match_data, 1, 1, 0, /* | |
| 3219 Set internal data on last search match from elements of LIST. | |
| 1468 | 3220 LIST should have been created by calling `match-data' previously, |
| 3221 or be nil, to clear the internal match data. | |
| 428 | 3222 */ |
| 3223 (list)) | |
| 3224 { | |
| 3225 REGISTER int i; | |
| 3226 REGISTER Lisp_Object marker; | |
| 3227 int num_regs; | |
| 3228 int length; | |
| 3229 | |
| 853 | 3230 /* Some FSF junk with running_asynch_code, to preserve the match |
| 3231 data. Not necessary because we don't call process filters | |
| 3232 asynchronously (i.e. from within QUIT). */ | |
| 428 | 3233 |
| 3234 CONCHECK_LIST (list); | |
| 3235 | |
| 3236 /* Unless we find a marker with a buffer in LIST, assume that this | |
| 3237 match data came from a string. */ | |
| 3238 last_thing_searched = Qt; | |
| 3239 | |
| 3240 /* Allocate registers if they don't already exist. */ | |
| 3241 length = XINT (Flength (list)) / 2; | |
| 3242 num_regs = search_regs.num_regs; | |
| 3243 | |
| 3244 if (length > num_regs) | |
| 3245 { | |
| 3246 if (search_regs.num_regs == 0) | |
| 3247 { | |
| 3248 search_regs.start = xnew_array (regoff_t, length); | |
| 3249 search_regs.end = xnew_array (regoff_t, length); | |
| 3250 } | |
| 3251 else | |
| 3252 { | |
| 3253 XREALLOC_ARRAY (search_regs.start, regoff_t, length); | |
| 3254 XREALLOC_ARRAY (search_regs.end, regoff_t, length); | |
| 3255 } | |
| 3256 | |
| 3257 search_regs.num_regs = length; | |
| 3258 } | |
| 3259 | |
| 3260 for (i = 0; i < num_regs; i++) | |
| 3261 { | |
| 3262 marker = Fcar (list); | |
| 3263 if (NILP (marker)) | |
| 3264 { | |
| 3265 search_regs.start[i] = -1; | |
| 3266 list = Fcdr (list); | |
| 3267 } | |
| 3268 else | |
| 3269 { | |
| 3270 if (MARKERP (marker)) | |
| 3271 { | |
| 3272 if (XMARKER (marker)->buffer == 0) | |
| 3273 marker = Qzero; | |
| 3274 else | |
| 793 | 3275 last_thing_searched = wrap_buffer (XMARKER (marker)->buffer); |
| 428 | 3276 } |
| 3277 | |
| 3278 CHECK_INT_COERCE_MARKER (marker); | |
| 3279 search_regs.start[i] = XINT (marker); | |
| 3280 list = Fcdr (list); | |
| 3281 | |
| 3282 marker = Fcar (list); | |
| 3283 if (MARKERP (marker) && XMARKER (marker)->buffer == 0) | |
| 3284 marker = Qzero; | |
| 3285 | |
| 3286 CHECK_INT_COERCE_MARKER (marker); | |
| 3287 search_regs.end[i] = XINT (marker); | |
| 3288 } | |
| 3289 list = Fcdr (list); | |
| 3290 } | |
| 3291 | |
| 3292 return Qnil; | |
| 3293 } | |
| 3294 | |
| 3295 /* Quote a string to inactivate reg-expr chars */ | |
| 3296 | |
| 3297 DEFUN ("regexp-quote", Fregexp_quote, 1, 1, 0, /* | |
| 3298 Return a regexp string which matches exactly STRING and nothing else. | |
| 3299 */ | |
| 444 | 3300 (string)) |
| 428 | 3301 { |
| 867 | 3302 REGISTER Ibyte *in, *out, *end; |
| 3303 REGISTER Ibyte *temp; | |
| 428 | 3304 |
| 444 | 3305 CHECK_STRING (string); |
| 428 | 3306 |
| 2367 | 3307 temp = alloca_ibytes (XSTRING_LENGTH (string) * 2); |
| 428 | 3308 |
| 3309 /* Now copy the data into the new string, inserting escapes. */ | |
| 3310 | |
| 444 | 3311 in = XSTRING_DATA (string); |
| 3312 end = in + XSTRING_LENGTH (string); | |
| 428 | 3313 out = temp; |
| 3314 | |
| 3315 while (in < end) | |
| 3316 { | |
| 867 | 3317 Ichar c = itext_ichar (in); |
| 428 | 3318 |
| 3319 if (c == '[' || c == ']' | |
| 3320 || c == '*' || c == '.' || c == '\\' | |
| 3321 || c == '?' || c == '+' | |
| 3322 || c == '^' || c == '$') | |
| 3323 *out++ = '\\'; | |
| 867 | 3324 out += set_itext_ichar (out, c); |
| 3325 INC_IBYTEPTR (in); | |
| 428 | 3326 } |
| 3327 | |
| 3328 return make_string (temp, out - temp); | |
| 3329 } | |
| 3330 | |
| 3331 DEFUN ("set-word-regexp", Fset_word_regexp, 1, 1, 0, /* | |
| 3332 Set the regexp to be used to match a word in regular-expression searching. | |
| 3333 #### Not yet implemented. Currently does nothing. | |
| 3334 #### Do not use this yet. Its calling interface is likely to change. | |
| 3335 */ | |
| 2286 | 3336 (UNUSED (regexp))) |
| 428 | 3337 { |
| 3338 return Qnil; | |
| 3339 } | |
| 3340 | |
| 3341 | |
| 5041 | 3342 #ifdef DEBUG_XEMACS |
| 3343 | |
| 3344 static int | |
| 3345 debug_regexps_changed (Lisp_Object UNUSED (sym), Lisp_Object *val, | |
| 3346 Lisp_Object UNUSED (in_object), | |
| 3347 int UNUSED (flags)) | |
| 3348 { | |
| 3349 int newval = 0; | |
| 3350 | |
| 3351 EXTERNAL_LIST_LOOP_2 (elt, *val) | |
| 3352 { | |
| 3353 CHECK_SYMBOL (elt); | |
| 3354 if (EQ (elt, Qcompilation)) | |
| 3355 newval |= RE_DEBUG_COMPILATION; | |
| 3356 else if (EQ (elt, Qfailure_point)) | |
| 3357 newval |= RE_DEBUG_FAILURE_POINT; | |
| 3358 else if (EQ (elt, Qmatching)) | |
| 3359 newval |= RE_DEBUG_MATCHING; | |
| 3360 else | |
| 3361 invalid_argument | |
| 3362 ("Expected `compilation', `failure-point' or `matching'", elt); | |
| 3363 } | |
| 3364 debug_regexps = newval; | |
| 3365 return 0; | |
| 3366 } | |
| 3367 | |
| 3368 #endif /* DEBUG_XEMACS */ | |
| 3369 | |
| 3370 | |
| 428 | 3371 /************************************************************************/ |
| 3372 /* initialization */ | |
| 3373 /************************************************************************/ | |
| 3374 | |
| 3375 void | |
| 3376 syms_of_search (void) | |
| 3377 { | |
| 3378 | |
| 442 | 3379 DEFERROR_STANDARD (Qsearch_failed, Qinvalid_operation); |
| 3380 DEFERROR_STANDARD (Qinvalid_regexp, Qsyntax_error); | |
| 563 | 3381 Fput (Qinvalid_regexp, Qerror_lacks_explanatory_string, Qt); |
| 428 | 3382 |
| 3383 DEFSUBR (Flooking_at); | |
| 3384 DEFSUBR (Fposix_looking_at); | |
| 3385 DEFSUBR (Fstring_match); | |
| 3386 DEFSUBR (Fposix_string_match); | |
| 3387 DEFSUBR (Fskip_chars_forward); | |
| 3388 DEFSUBR (Fskip_chars_backward); | |
| 3389 DEFSUBR (Fskip_syntax_forward); | |
| 3390 DEFSUBR (Fskip_syntax_backward); | |
| 3391 DEFSUBR (Fsearch_forward); | |
| 3392 DEFSUBR (Fsearch_backward); | |
| 3393 DEFSUBR (Fword_search_forward); | |
| 3394 DEFSUBR (Fword_search_backward); | |
| 3395 DEFSUBR (Fre_search_forward); | |
| 3396 DEFSUBR (Fre_search_backward); | |
| 3397 DEFSUBR (Fposix_search_forward); | |
| 3398 DEFSUBR (Fposix_search_backward); | |
| 3399 DEFSUBR (Freplace_match); | |
| 3400 DEFSUBR (Fmatch_beginning); | |
| 3401 DEFSUBR (Fmatch_end); | |
| 3402 DEFSUBR (Fmatch_data); | |
| 3403 DEFSUBR (Fstore_match_data); | |
| 3404 DEFSUBR (Fregexp_quote); | |
| 3405 DEFSUBR (Fset_word_regexp); | |
| 3406 } | |
| 3407 | |
| 3408 void | |
| 3409 reinit_vars_of_search (void) | |
| 3410 { | |
| 3411 int i; | |
| 3412 | |
| 3413 last_thing_searched = Qnil; | |
| 3414 staticpro_nodump (&last_thing_searched); | |
| 3415 | |
| 3416 for (i = 0; i < REGEXP_CACHE_SIZE; ++i) | |
| 3417 { | |
| 3418 searchbufs[i].buf.allocated = 100; | |
| 3419 searchbufs[i].buf.buffer = (unsigned char *) xmalloc (100); | |
| 3420 searchbufs[i].buf.fastmap = searchbufs[i].fastmap; | |
| 3421 searchbufs[i].regexp = Qnil; | |
| 3422 staticpro_nodump (&searchbufs[i].regexp); | |
| 3423 searchbufs[i].next = (i == REGEXP_CACHE_SIZE-1 ? 0 : &searchbufs[i+1]); | |
| 3424 } | |
| 3425 searchbuf_head = &searchbufs[0]; | |
| 3426 } | |
| 3427 | |
| 3428 void | |
| 3429 vars_of_search (void) | |
| 3430 { | |
| 3431 DEFVAR_LISP ("forward-word-regexp", &Vforward_word_regexp /* | |
| 3432 *Regular expression to be used in `forward-word'. | |
| 3433 #### Not yet implemented. | |
| 3434 */ ); | |
| 3435 Vforward_word_regexp = Qnil; | |
| 3436 | |
| 3437 DEFVAR_LISP ("backward-word-regexp", &Vbackward_word_regexp /* | |
| 3438 *Regular expression to be used in `backward-word'. | |
| 3439 #### Not yet implemented. | |
| 3440 */ ); | |
| 3441 Vbackward_word_regexp = Qnil; | |
| 502 | 3442 |
| 3443 DEFVAR_INT ("warn-about-possibly-incompatible-back-references", | |
| 3444 &warn_about_possibly_incompatible_back_references /* | |
| 3445 If true, issue warnings when new-semantics back references occur. | |
| 3446 This is to catch places where old code might inadvertently have changed | |
| 3447 semantics. This will occur in old code only where more than nine groups | |
| 3448 occur and a back reference to one of them is directly followed by a digit. | |
| 3449 */ ); | |
| 3450 warn_about_possibly_incompatible_back_references = 1; | |
| 814 | 3451 |
| 2421 | 3452 Vskip_chars_range_table = Fmake_range_table (Qstart_closed_end_closed); |
| 428 | 3453 staticpro (&Vskip_chars_range_table); |
|
4414
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3454 #ifdef DEBUG_XEMACS |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3455 DEFSYMBOL (Qsearch_algorithm_used); |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3456 DEFSYMBOL (Qboyer_moore); |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3457 DEFSYMBOL (Qsimple_search); |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3458 |
| 5041 | 3459 DEFSYMBOL (Qcompilation); |
| 3460 DEFSYMBOL (Qfailure_point); | |
| 3461 DEFSYMBOL (Qmatching); | |
| 3462 | |
| 3463 DEFVAR_INT ("debug-searches", &debug_searches /* | |
|
4414
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3464 If non-zero, bind `search-algorithm-used' to `boyer-moore' or `simple-search', |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3465 depending on the algorithm used for each search. Used for testing. |
|
df576f30c1d8
Correct case-insensitive search for non-case, non-ASCII chars. Add tests.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4407
diff
changeset
|
3466 */ ); |
| 5041 | 3467 debug_searches = 0; |
| 3468 | |
| 3469 DEFVAR_LISP_MAGIC ("debug-regexps", &Vdebug_regexps, /* | |
| 3470 List of areas to display debug info about during regexp operation. | |
| 3471 The following areas are recognized: | |
| 3472 | |
| 3473 `compilation' Display the result of compiling a regexp. | |
| 3474 `failure-point' Display info about failure points reached. | |
| 3475 `matching' Display info about the process of matching a regex against | |
| 3476 text. | |
| 3477 */ debug_regexps_changed); | |
| 3478 Vdebug_regexps = Qnil; | |
| 3479 debug_regexps = 0; | |
| 3480 #endif /* DEBUG_XEMACS */ | |
| 428 | 3481 } |