Mercurial > hg > xemacs-beta
annotate src/syntax.c @ 5131:b42a3c0d709e ben-lisp-object
fix permissions, fix Jerry's photos
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sun, 07 Mar 2010 06:42:03 -0600 |
| parents | a9c41067dd88 |
| children | 6c6d78781d59 |
| rev | line source |
|---|---|
| 428 | 1 /* XEmacs routines to deal with syntax tables; also word and list parsing. |
| 2 Copyright (C) 1985-1994 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
| 1296 | 4 Copyright (C) 2001, 2002, 2003 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 19.28. */ | |
| 24 | |
| 25 /* This file has been Mule-ized. */ | |
| 26 | |
| 27 #include <config.h> | |
| 28 #include "lisp.h" | |
| 29 | |
| 30 #include "buffer.h" | |
| 31 #include "syntax.h" | |
| 460 | 32 #include "extents.h" |
| 428 | 33 |
| 460 | 34 #define ST_COMMENT_STYLE 0x101 |
| 35 #define ST_STRING_STYLE 0x102 | |
| 36 | |
| 37 Lisp_Object Qsyntax_table; | |
| 38 int lookup_syntax_properties; | |
| 39 | |
| 428 | 40 Lisp_Object Qsyntax_table_p; |
| 41 | |
| 42 int words_include_escapes; | |
| 43 | |
| 44 int parse_sexp_ignore_comments; | |
| 45 | |
| 46 /* The following two variables are provided to tell additional information | |
| 47 to the regex routines. We do it this way rather than change the | |
| 48 arguments to re_search_2() in an attempt to maintain some call | |
| 49 compatibility with other versions of the regex code. */ | |
| 50 | |
| 51 /* Tell the regex routines not to QUIT. Normally there is a QUIT | |
| 52 each iteration in re_search_2(). */ | |
| 53 int no_quit_in_re_search; | |
| 54 | |
| 826 | 55 /* The standard syntax table is stored where it will automatically |
| 56 be used in all new buffers. */ | |
| 428 | 57 Lisp_Object Vstandard_syntax_table; |
| 58 | |
| 59 Lisp_Object Vsyntax_designator_chars_string; | |
| 60 | |
| 826 | 61 Lisp_Object Vtemp_table_for_use_updating_syntax_tables; |
| 62 | |
| 1296 | 63 /* A value that is guaranteed not be in a syntax table. */ |
| 64 Lisp_Object Vbogus_syntax_table_value; | |
| 65 | |
|
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66 Lisp_Object Qscan_error; |
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67 |
| 826 | 68 static void syntax_cache_table_was_changed (struct buffer *buf); |
| 69 | |
| 428 | 70 /* This is the internal form of the parse state used in parse-partial-sexp. */ |
| 71 | |
| 72 struct lisp_parse_state | |
| 73 { | |
| 74 int depth; /* Depth at end of parsing */ | |
| 867 | 75 Ichar instring; /* -1 if not within string, else desired terminator */ |
| 428 | 76 int incomment; /* Nonzero if within a comment at end of parsing */ |
| 460 | 77 int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE */ |
| 428 | 78 int quoted; /* Nonzero if just after an escape char at end of |
| 79 parsing */ | |
| 665 | 80 Charbpos thislevelstart;/* Char number of most recent start-of-expression |
| 428 | 81 at current level */ |
| 665 | 82 Charbpos prevlevelstart;/* Char number of start of containing expression */ |
| 83 Charbpos location; /* Char number at which parsing stopped */ | |
| 428 | 84 int mindepth; /* Minimum depth seen while scanning */ |
| 826 | 85 Charbpos comstr_start;/* Position just after last comment/string starter */ |
| 86 Lisp_Object levelstarts;/* Char numbers of starts-of-expression | |
| 87 of levels (starting from outermost). */ | |
| 428 | 88 }; |
| 89 | |
| 90 /* These variables are a cache for finding the start of a defun. | |
| 91 find_start_pos is the place for which the defun start was found. | |
| 92 find_start_value is the defun start position found for it. | |
| 93 find_start_buffer is the buffer it was found in. | |
| 94 find_start_begv is the BEGV value when it was found. | |
| 95 find_start_modiff is the value of MODIFF when it was found. */ | |
| 96 | |
| 665 | 97 static Charbpos find_start_pos; |
| 98 static Charbpos find_start_value; | |
| 428 | 99 static struct buffer *find_start_buffer; |
| 665 | 100 static Charbpos find_start_begv; |
| 428 | 101 static int find_start_modiff; |
| 102 | |
| 103 /* Find a defun-start that is the last one before POS (or nearly the last). | |
| 104 We record what we find, so that another call in the same area | |
| 105 can return the same value right away. */ | |
| 106 | |
| 665 | 107 static Charbpos |
| 108 find_defun_start (struct buffer *buf, Charbpos pos) | |
| 428 | 109 { |
| 665 | 110 Charbpos tem; |
| 826 | 111 struct syntax_cache *scache; |
| 112 | |
| 428 | 113 /* Use previous finding, if it's valid and applies to this inquiry. */ |
| 114 if (buf == find_start_buffer | |
| 115 /* Reuse the defun-start even if POS is a little farther on. | |
| 116 POS might be in the next defun, but that's ok. | |
| 117 Our value may not be the best possible, but will still be usable. */ | |
| 118 && pos <= find_start_pos + 1000 | |
| 119 && pos >= find_start_value | |
| 120 && BUF_BEGV (buf) == find_start_begv | |
| 121 && BUF_MODIFF (buf) == find_start_modiff) | |
| 122 return find_start_value; | |
| 123 | |
| 124 /* Back up to start of line. */ | |
| 125 tem = find_next_newline (buf, pos, -1); | |
| 126 | |
| 826 | 127 scache = setup_buffer_syntax_cache (buf, tem, 1); |
| 428 | 128 while (tem > BUF_BEGV (buf)) |
| 129 { | |
| 826 | 130 UPDATE_SYNTAX_CACHE_BACKWARD (scache, tem); |
| 460 | 131 |
| 428 | 132 /* Open-paren at start of line means we found our defun-start. */ |
| 826 | 133 if (SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, tem)) == Sopen) |
| 428 | 134 break; |
| 135 /* Move to beg of previous line. */ | |
| 136 tem = find_next_newline (buf, tem, -2); | |
| 137 } | |
| 138 | |
| 139 /* Record what we found, for the next try. */ | |
| 140 find_start_value = tem; | |
| 141 find_start_buffer = buf; | |
| 142 find_start_modiff = BUF_MODIFF (buf); | |
| 143 find_start_begv = BUF_BEGV (buf); | |
| 144 find_start_pos = pos; | |
| 145 | |
| 146 return find_start_value; | |
| 147 } | |
| 148 | |
| 149 DEFUN ("syntax-table-p", Fsyntax_table_p, 1, 1, 0, /* | |
| 444 | 150 Return t if OBJECT is a syntax table. |
| 428 | 151 */ |
| 444 | 152 (object)) |
| 428 | 153 { |
| 444 | 154 return (CHAR_TABLEP (object) |
| 155 && XCHAR_TABLE_TYPE (object) == CHAR_TABLE_TYPE_SYNTAX) | |
| 428 | 156 ? Qt : Qnil; |
| 157 } | |
| 158 | |
| 159 static Lisp_Object | |
| 160 check_syntax_table (Lisp_Object obj, Lisp_Object default_) | |
| 161 { | |
| 162 if (NILP (obj)) | |
| 163 obj = default_; | |
| 164 while (NILP (Fsyntax_table_p (obj))) | |
| 165 obj = wrong_type_argument (Qsyntax_table_p, obj); | |
| 166 return obj; | |
| 167 } | |
| 168 | |
| 169 DEFUN ("syntax-table", Fsyntax_table, 0, 1, 0, /* | |
| 170 Return the current syntax table. | |
| 171 This is the one specified by the current buffer, or by BUFFER if it | |
| 172 is non-nil. | |
| 173 */ | |
| 174 (buffer)) | |
| 175 { | |
| 176 return decode_buffer (buffer, 0)->syntax_table; | |
| 177 } | |
| 178 | |
| 826 | 179 #ifdef DEBUG_XEMACS |
| 180 | |
| 181 DEFUN ("mirror-syntax-table", Fmirror_syntax_table, 0, 1, 0, /* | |
| 182 Return the current mirror syntax table, for debugging purposes. | |
| 183 This is the one specified by the current buffer, or by BUFFER if it | |
| 184 is non-nil. | |
| 185 */ | |
| 186 (buffer)) | |
| 187 { | |
| 188 return decode_buffer (buffer, 0)->mirror_syntax_table; | |
| 189 } | |
| 190 | |
| 191 DEFUN ("syntax-cache-info", Fsyntax_cache_info, 0, 1, 0, /* | |
| 192 Return info about the syntax cache in BUFFER. | |
| 193 BUFFER defaults to the current buffer if nil. | |
| 194 */ | |
| 195 (buffer)) | |
| 196 { | |
| 197 struct buffer *buf = decode_buffer (buffer, 0); | |
| 198 struct syntax_cache *cache = buf->syntax_cache; | |
| 199 return list4 (cache->start, cache->end, make_int (cache->prev_change), | |
| 200 make_int (cache->next_change)); | |
| 201 } | |
| 202 | |
| 203 #endif /* DEBUG_XEMACS */ | |
| 204 | |
| 428 | 205 DEFUN ("standard-syntax-table", Fstandard_syntax_table, 0, 0, 0, /* |
| 206 Return the standard syntax table. | |
| 207 This is the one used for new buffers. | |
| 208 */ | |
| 209 ()) | |
| 210 { | |
| 211 return Vstandard_syntax_table; | |
| 212 } | |
| 213 | |
| 214 DEFUN ("copy-syntax-table", Fcopy_syntax_table, 0, 1, 0, /* | |
| 444 | 215 Return a new syntax table which is a copy of SYNTAX-TABLE. |
| 216 SYNTAX-TABLE defaults to the standard syntax table. | |
| 428 | 217 */ |
| 444 | 218 (syntax_table)) |
| 428 | 219 { |
| 220 if (NILP (Vstandard_syntax_table)) | |
| 221 return Fmake_char_table (Qsyntax); | |
| 222 | |
| 444 | 223 syntax_table = check_syntax_table (syntax_table, Vstandard_syntax_table); |
| 224 return Fcopy_char_table (syntax_table); | |
| 428 | 225 } |
| 226 | |
| 227 DEFUN ("set-syntax-table", Fset_syntax_table, 1, 2, 0, /* | |
| 444 | 228 Select SYNTAX-TABLE as the new syntax table for BUFFER. |
| 428 | 229 BUFFER defaults to the current buffer if omitted. |
| 230 */ | |
| 444 | 231 (syntax_table, buffer)) |
| 428 | 232 { |
| 233 struct buffer *buf = decode_buffer (buffer, 0); | |
| 444 | 234 syntax_table = check_syntax_table (syntax_table, Qnil); |
| 235 buf->syntax_table = syntax_table; | |
| 236 buf->mirror_syntax_table = XCHAR_TABLE (syntax_table)->mirror_table; | |
| 826 | 237 syntax_cache_table_was_changed (buf); |
| 428 | 238 /* Indicate that this buffer now has a specified syntax table. */ |
| 239 buf->local_var_flags |= XINT (buffer_local_flags.syntax_table); | |
| 444 | 240 return syntax_table; |
| 428 | 241 } |
| 3252 | 242 |
| 243 | |
| 428 | 244 |
| 3252 | 245 /* |
| 246 * Syntax caching | |
| 247 */ | |
| 248 | |
| 249 /* syntax_cache object implementation */ | |
| 250 | |
| 251 static const struct memory_description syntax_cache_description_1 [] = { | |
| 252 { XD_LISP_OBJECT, offsetof (struct syntax_cache, object) }, | |
| 253 { XD_LISP_OBJECT, offsetof (struct syntax_cache, buffer) }, | |
| 254 { XD_LISP_OBJECT, offsetof (struct syntax_cache, syntax_table) }, | |
| 255 { XD_LISP_OBJECT, offsetof (struct syntax_cache, mirror_table) }, | |
| 256 { XD_LISP_OBJECT, offsetof (struct syntax_cache, start) }, | |
| 257 { XD_LISP_OBJECT, offsetof (struct syntax_cache, end) }, | |
| 258 { XD_END } | |
| 259 }; | |
| 260 | |
| 261 #ifdef NEW_GC | |
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262 DEFINE_DUMPABLE_INTERNAL_LISP_OBJECT ("syntax-cache", syntax_cache, |
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263 0, syntax_cache_description_1, |
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264 Lisp_Syntax_Cache); |
| 3252 | 265 #else /* not NEW_GC */ |
| 266 | |
| 267 const struct sized_memory_description syntax_cache_description = { | |
| 268 sizeof (struct syntax_cache), | |
| 269 syntax_cache_description_1 | |
| 270 }; | |
| 271 #endif /* not NEW_GC */ | |
| 272 | |
| 273 /* static syntax cache utilities */ | |
| 274 | |
| 275 static void | |
| 276 syntax_cache_table_was_changed (struct buffer *buf) | |
| 277 { | |
| 278 struct syntax_cache *cache = buf->syntax_cache; | |
| 279 if (cache->no_syntax_table_prop) | |
| 280 { | |
| 281 cache->syntax_table = | |
| 282 BUFFER_SYNTAX_TABLE (buf); | |
| 283 cache->mirror_table = | |
| 284 BUFFER_MIRROR_SYNTAX_TABLE (buf); | |
| 285 } | |
| 286 } | |
| 287 | |
| 288 static void | |
| 289 reset_buffer_syntax_cache_range (struct syntax_cache *cache, | |
| 290 Lisp_Object buffer, int infinite) | |
| 291 { | |
| 292 Fset_marker (cache->start, make_int (1), buffer); | |
| 293 Fset_marker (cache->end, make_int (1), buffer); | |
| 294 Fset_marker_insertion_type (cache->start, Qt); | |
| 295 Fset_marker_insertion_type (cache->end, Qnil); | |
| 296 /* #### Should we "cache->no_syntax_table_prop = 1;" here? */ | |
| 297 /* #### Cf comment on INFINITE in init_syntax_cache. -- sjt */ | |
| 298 if (infinite) | |
| 299 { | |
| 300 cache->prev_change = EMACS_INT_MIN; | |
| 301 cache->next_change = EMACS_INT_MAX; | |
| 302 } | |
| 303 else | |
| 304 { | |
| 305 cache->prev_change = -1; | |
| 306 cache->next_change = -1; | |
| 307 } | |
| 308 } | |
| 826 | 309 |
| 310 static void | |
| 311 init_syntax_cache (struct syntax_cache *cache, Lisp_Object object, | |
| 312 struct buffer *buffer, int infinite) | |
| 313 { | |
| 314 xzero (*cache); | |
| 315 cache->object = object; | |
| 316 cache->buffer = buffer; | |
| 317 cache->no_syntax_table_prop = 1; | |
| 1296 | 318 cache->syntax_table = |
| 319 BUFFER_SYNTAX_TABLE (cache->buffer); | |
| 320 cache->mirror_table = | |
| 826 | 321 BUFFER_MIRROR_SYNTAX_TABLE (cache->buffer); |
| 322 cache->start = Qnil; | |
| 323 cache->end = Qnil; | |
| 3250 | 324 /* #### I'm not sure what INFINITE is for, but it's apparently needed by |
| 325 setup_syntax_cache(). It looks like it's supposed to guarantee that | |
| 326 the test for POS outside of cache-valid range will never succeed, so | |
| 327 that update_syntax_cache won't get called, but it's hard to be sure. | |
| 328 Cf reset_buffer_syntax_cache_range. -- sjt */ | |
| 826 | 329 if (infinite) |
| 330 { | |
| 331 cache->prev_change = EMACS_INT_MIN; | |
| 332 cache->next_change = EMACS_INT_MAX; | |
| 333 } | |
| 334 else | |
| 335 { | |
| 336 cache->prev_change = -1; | |
| 337 cache->next_change = -1; | |
| 338 } | |
| 339 } | |
| 340 | |
| 3252 | 341 /* external syntax cache API */ |
| 342 | |
| 3250 | 343 /* #### This function and associated logic still needs work, and especially |
| 344 documentation. */ | |
| 345 struct syntax_cache * /* return CACHE or the cache of OBJECT */ | |
| 346 setup_syntax_cache (struct syntax_cache *cache, /* syntax cache, may be NULL | |
| 347 if OBJECT is a buffer */ | |
| 348 Lisp_Object object, /* the object (if any) cache | |
| 349 is associated with */ | |
| 350 struct buffer *buffer, /* the buffer to use as source | |
| 351 of the syntax table */ | |
| 352 Charxpos from, /* initial position of cache */ | |
| 353 int count) /* direction? see code */ | |
| 826 | 354 { |
| 3250 | 355 /* If OBJECT is a buffer, use its cache. Initialize cache. Make it valid |
| 356 for the whole buffer if the syntax-table property is not being respected. | |
| 357 Else if OBJECT is not a buffer, initialize the cache passed in CACHE. | |
| 358 If the syntax-table property is being respected, update the cache. */ | |
| 826 | 359 if (BUFFERP (object)) |
| 3250 | 360 { |
| 361 cache = XBUFFER (object)->syntax_cache; | |
| 362 if (!lookup_syntax_properties) | |
| 363 reset_buffer_syntax_cache_range (cache, object, 1); | |
| 364 } | |
| 365 else | |
| 826 | 366 init_syntax_cache (cache, object, buffer, 0); |
| 367 if (lookup_syntax_properties) | |
| 368 { | |
| 369 if (count <= 0) | |
| 370 { | |
| 371 from--; | |
| 2167 | 372 from = buffer_or_string_clip_to_accessible_char (cache->object, |
| 826 | 373 from); |
| 374 } | |
| 375 if (!(from >= cache->prev_change && from < cache->next_change)) | |
| 376 update_syntax_cache (cache, from, count); | |
| 377 } | |
| 1296 | 378 #ifdef NOT_WORTH_THE_EFFORT |
| 379 update_mirror_syntax_if_dirty (cache->mirror_table); | |
| 380 #endif /* NOT_WORTH_THE_EFFORT */ | |
| 826 | 381 return cache; |
| 382 } | |
| 383 | |
| 384 struct syntax_cache * | |
| 385 setup_buffer_syntax_cache (struct buffer *buffer, Charxpos from, int count) | |
| 386 { | |
| 387 return setup_syntax_cache (NULL, wrap_buffer (buffer), buffer, from, count); | |
| 388 } | |
| 389 | |
| 460 | 390 /* |
| 391 Update syntax_cache to an appropriate setting for position POS | |
| 392 | |
| 393 The sign of COUNT gives the relative position of POS wrt the | |
| 394 previously valid interval. (not currently used) | |
| 395 | |
| 396 `syntax_cache.*_change' are the next and previous positions at | |
| 397 which syntax_code and c_s_t will need to be recalculated. | |
| 398 | |
| 3025 | 399 #### Currently this code uses `get-char-property', which will |
| 460 | 400 return the "last smallest" extent at a given position. In cases |
| 401 where overlapping extents are defined, this code will simply use | |
| 402 whatever is returned by get-char-property. | |
| 403 | |
| 404 It might be worth it at some point to merge provided syntax tables | |
| 826 | 405 outward to the current buffer (#### rewrite in English please?!). */ |
| 460 | 406 |
| 407 void | |
| 2286 | 408 update_syntax_cache (struct syntax_cache *cache, Charxpos cpos, |
| 409 int UNUSED (count)) | |
| 460 | 410 { |
| 411 Lisp_Object tmp_table; | |
| 826 | 412 Bytexpos pos; |
| 413 Bytexpos lim; | |
| 414 Bytexpos next, prev; | |
| 415 int at_begin = 0, at_end = 0; | |
| 460 | 416 |
| 826 | 417 if (NILP (cache->object)) |
| 418 return; | |
| 419 | |
| 420 pos = buffer_or_string_charxpos_to_bytexpos (cache->object, cpos); | |
| 421 | |
| 422 tmp_table = get_char_property (pos, Qsyntax_table, cache->object, | |
| 423 EXTENT_AT_AFTER, 0); | |
| 2506 | 424 lim = next_previous_single_property_change (pos, Qsyntax_table, |
| 425 cache->object, -1, 1, 0); | |
| 826 | 426 if (lim < 0) |
| 460 | 427 { |
| 826 | 428 next = buffer_or_string_absolute_end_byte (cache->object); |
| 429 at_begin = 1; | |
| 460 | 430 } |
| 826 | 431 else |
| 432 next = lim; | |
| 460 | 433 |
| 826 | 434 if (pos < buffer_or_string_absolute_end_byte (cache->object)) |
| 435 pos = next_bytexpos (cache->object, pos); | |
| 2506 | 436 lim = next_previous_single_property_change (pos, Qsyntax_table, |
| 437 cache->object, -1, 0, 0); | |
| 826 | 438 if (lim < 0) |
| 460 | 439 { |
| 826 | 440 prev = buffer_or_string_absolute_begin_byte (cache->object); |
| 441 at_end = 1; | |
| 460 | 442 } |
| 443 else | |
| 826 | 444 prev = lim; |
| 460 | 445 |
| 826 | 446 cache->prev_change = |
| 447 buffer_or_string_bytexpos_to_charxpos (cache->object, prev); | |
| 448 cache->next_change = | |
| 449 buffer_or_string_bytexpos_to_charxpos (cache->object, next); | |
| 460 | 450 |
| 826 | 451 if (BUFFERP (cache->object)) |
| 452 { | |
| 453 /* If we are at the beginning or end of buffer, check to see if there's | |
| 454 a zero-length `syntax-table' extent there (highly unlikely); if not, | |
| 455 then we can safely make the end closed, so it will take in newly | |
| 456 inserted text. (If such an extent is inserted, we will be informed | |
| 3250 | 457 through signal_syntax_cache_extent_changed().) */ |
| 826 | 458 Fset_marker (cache->start, make_int (cache->prev_change), cache->object); |
| 459 Fset_marker_insertion_type | |
| 460 (cache->start, | |
| 461 at_begin && NILP (extent_at (prev, cache->object, Qsyntax_table, | |
| 462 NULL, EXTENT_AT_AT, 0)) | |
| 463 ? Qnil : Qt); | |
| 464 Fset_marker (cache->end, make_int (cache->next_change), cache->object); | |
| 465 Fset_marker_insertion_type | |
| 466 (cache->end, | |
| 467 at_end && NILP (extent_at (next, cache->object, Qsyntax_table, | |
| 468 NULL, EXTENT_AT_AT, 0)) | |
| 469 ? Qt : Qnil); | |
| 470 } | |
| 471 | |
| 472 if (!NILP (Fsyntax_table_p (tmp_table))) | |
| 473 { | |
| 474 cache->use_code = 0; | |
| 1296 | 475 cache->syntax_table = tmp_table; |
| 476 cache->mirror_table = XCHAR_TABLE (tmp_table)->mirror_table; | |
| 826 | 477 cache->no_syntax_table_prop = 0; |
| 1296 | 478 #ifdef NOT_WORTH_THE_EFFORT |
| 479 update_mirror_syntax_if_dirty (cache->mirror_table); | |
| 480 #endif /* NOT_WORTH_THE_EFFORT */ | |
| 826 | 481 } |
| 482 else if (CONSP (tmp_table) && INTP (XCAR (tmp_table))) | |
| 483 { | |
| 484 cache->use_code = 1; | |
| 485 cache->syntax_code = XINT (XCAR (tmp_table)); | |
| 486 cache->no_syntax_table_prop = 0; | |
| 487 } | |
| 488 else | |
| 489 { | |
| 490 cache->use_code = 0; | |
| 491 cache->no_syntax_table_prop = 1; | |
| 1296 | 492 cache->syntax_table = BUFFER_SYNTAX_TABLE (cache->buffer); |
| 493 cache->mirror_table = BUFFER_MIRROR_SYNTAX_TABLE (cache->buffer); | |
| 494 #ifdef NOT_WORTH_THE_EFFORT | |
| 495 update_mirror_syntax_if_dirty (cache->mirror_table); | |
| 496 #endif /* NOT_WORTH_THE_EFFORT */ | |
| 460 | 497 } |
| 498 } | |
| 3252 | 499 |
| 500 /* buffer-specific APIs used in buffer.c | |
| 501 #### This is really unclean; | |
| 502 the syntax cache should just be a LISP object */ | |
| 503 | |
| 504 void | |
| 505 mark_buffer_syntax_cache (struct buffer *buf) | |
| 506 { | |
| 507 struct syntax_cache *cache = buf->syntax_cache; | |
| 508 if (!cache) /* Vbuffer_defaults and such don't have caches */ | |
| 509 return; | |
| 510 mark_object (cache->object); | |
| 511 if (cache->buffer) | |
| 512 mark_object (wrap_buffer (cache->buffer)); | |
| 513 mark_object (cache->syntax_table); | |
| 514 mark_object (cache->mirror_table); | |
| 515 mark_object (cache->start); | |
| 516 mark_object (cache->end); | |
| 517 } | |
| 518 | |
| 519 void | |
| 520 init_buffer_syntax_cache (struct buffer *buf) | |
| 521 { | |
| 522 struct syntax_cache *cache; | |
| 523 #ifdef NEW_GC | |
|
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524 buf->syntax_cache = XSYNTAX_CACHE (ALLOC_NORMAL_LISP_OBJECT (syntax_cache)); |
| 3252 | 525 #else /* not NEW_GC */ |
| 526 buf->syntax_cache = xnew_and_zero (struct syntax_cache); | |
| 527 #endif /* not NEW_GC */ | |
| 528 cache = buf->syntax_cache; | |
| 529 cache->object = wrap_buffer (buf); | |
| 530 cache->buffer = buf; | |
| 531 cache->no_syntax_table_prop = 1; | |
| 532 cache->syntax_table = BUFFER_SYNTAX_TABLE (cache->buffer); | |
| 533 cache->mirror_table = BUFFER_MIRROR_SYNTAX_TABLE (cache->buffer); | |
| 534 cache->start = Fmake_marker (); | |
| 535 cache->end = Fmake_marker (); | |
| 536 reset_buffer_syntax_cache_range (cache, cache->object, 0); | |
| 537 } | |
| 538 | |
| 539 /* finalize the syntax cache for BUF */ | |
| 540 | |
| 541 void | |
|
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542 uninit_buffer_syntax_cache (struct buffer *UNUSED_IF_NEW_GC (buf)) |
| 3252 | 543 { |
| 4141 | 544 #ifndef NEW_GC |
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545 xfree (buf->syntax_cache); |
| 3252 | 546 buf->syntax_cache = 0; |
| 4141 | 547 #endif /* not NEW_GC */ |
| 3252 | 548 } |
| 549 | |
| 550 /* extent-specific APIs used in extents.c and insdel.c */ | |
| 551 | |
| 552 /* The syntax-table property on the range covered by EXTENT may be changing, | |
| 553 either because EXTENT has a syntax-table property and is being attached | |
| 554 or detached (this includes having its endpoints changed), or because | |
| 555 the value of EXTENT's syntax-table property is changing. */ | |
| 556 | |
| 557 void | |
| 558 signal_syntax_cache_extent_changed (EXTENT extent) | |
| 559 { | |
| 560 Lisp_Object buffer = Fextent_object (wrap_extent (extent)); | |
| 561 if (BUFFERP (buffer)) | |
| 562 { | |
| 563 /* This was getting called with the buffer's start and end null, eg in | |
| 564 cperl mode, which triggers an assert in byte_marker_position. Cf | |
| 565 thread rooted at <yxz7j7xzk97.fsf@gimli.holgi.priv> on xemacs-beta. | |
| 566 <yxzfymklb6p.fsf@gimli.holgi.priv> has a recipe, but you also need | |
| 567 to delete or type SPC to get the crash. | |
| 568 #### Delete this comment when setup_syntax_cache is made sane. */ | |
| 569 struct syntax_cache *cache = XBUFFER (buffer)->syntax_cache; | |
| 570 /* #### would this be slower or less accurate in character terms? */ | |
| 571 Bytexpos start = extent_endpoint_byte (extent, 0); | |
| 572 Bytexpos end = extent_endpoint_byte (extent, 1); | |
| 573 Bytexpos start2 = byte_marker_position (cache->start); | |
| 574 Bytexpos end2 = byte_marker_position (cache->end); | |
| 575 /* If the extent is entirely before or entirely after the cache | |
| 576 range, it doesn't overlap. Otherwise, invalidate the range. */ | |
| 577 if (!(end < start2 || start > end2)) | |
| 578 reset_buffer_syntax_cache_range (cache, buffer, 0); | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 /* Extents have been adjusted for insertion or deletion, so we need to | |
| 583 refetch the start and end position of the extent */ | |
| 584 void | |
| 585 signal_syntax_cache_extent_adjust (struct buffer *buf) | |
| 586 { | |
| 587 struct syntax_cache *cache = buf->syntax_cache; | |
| 588 /* If the cache was invalid before, leave it that way. We only want | |
| 589 to update the limits of validity when they were actually valid. */ | |
| 590 if (cache->prev_change < 0) | |
| 591 return; | |
| 592 cache->prev_change = marker_position (cache->start); | |
| 593 cache->next_change = marker_position (cache->end); | |
| 594 } | |
| 595 | |
| 596 | |
| 460 | 597 |
| 428 | 598 /* Convert a letter which signifies a syntax code |
| 599 into the code it signifies. | |
| 600 This is used by modify-syntax-entry, and other things. */ | |
| 601 | |
| 442 | 602 const unsigned char syntax_spec_code[0400] = |
| 428 | 603 { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
| 604 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 605 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 606 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 607 (char) Swhitespace, 0377, (char) Sstring, 0377, | |
| 608 (char) Smath, 0377, 0377, (char) Squote, | |
| 609 (char) Sopen, (char) Sclose, 0377, 0377, | |
| 610 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
| 611 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 612 0377, 0377, 0377, 0377, | |
| 613 (char) Scomment, 0377, (char) Sendcomment, 0377, | |
| 614 (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ | |
| 615 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 616 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
| 617 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
| 618 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
| 619 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 620 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
| 460 | 621 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
| 428 | 622 }; |
| 623 | |
| 460 | 624 const unsigned char syntax_code_spec[] = " .w_()'\"$\\/<>@!|"; |
| 428 | 625 |
| 626 DEFUN ("syntax-designator-chars", Fsyntax_designator_chars, 0, 0, 0, /* | |
| 627 Return a string of the recognized syntax designator chars. | |
| 628 The chars are ordered by their internal syntax codes, which are | |
| 629 numbered starting at 0. | |
| 630 */ | |
| 631 ()) | |
| 632 { | |
| 633 return Vsyntax_designator_chars_string; | |
| 634 } | |
| 635 | |
| 636 DEFUN ("char-syntax", Fchar_syntax, 1, 2, 0, /* | |
| 444 | 637 Return the syntax code of CHARACTER, described by a character. |
| 638 For example, if CHARACTER is a word constituent, | |
| 639 the character `?w' is returned. | |
| 428 | 640 The characters that correspond to various syntax codes |
| 641 are listed in the documentation of `modify-syntax-entry'. | |
| 444 | 642 Optional second argument SYNTAX-TABLE defaults to the current buffer's |
| 428 | 643 syntax table. |
| 644 */ | |
| 444 | 645 (character, syntax_table)) |
| 428 | 646 { |
| 826 | 647 Lisp_Object mirrortab; |
| 428 | 648 |
| 444 | 649 if (NILP (character)) |
| 428 | 650 { |
| 444 | 651 character = make_char ('\000'); |
| 428 | 652 } |
| 444 | 653 CHECK_CHAR_COERCE_INT (character); |
| 826 | 654 syntax_table = check_syntax_table (syntax_table, |
| 655 current_buffer->syntax_table); | |
| 656 mirrortab = XCHAR_TABLE (syntax_table)->mirror_table; | |
| 657 return make_char (syntax_code_spec[(int) SYNTAX (mirrortab, | |
| 658 XCHAR (character))]); | |
| 428 | 659 } |
| 660 | |
| 661 #ifdef MULE | |
| 662 | |
| 663 enum syntaxcode | |
| 2286 | 664 charset_syntax (struct buffer *UNUSED (buf), Lisp_Object UNUSED (charset), |
| 665 int *multi_p_out) | |
| 428 | 666 { |
| 667 *multi_p_out = 1; | |
| 826 | 668 /* !!#### get this right */ |
| 3152 | 669 return Sword; |
| 428 | 670 } |
| 671 | |
| 672 #endif | |
| 673 | |
| 674 Lisp_Object | |
| 867 | 675 syntax_match (Lisp_Object syntax_table, Ichar ch) |
| 428 | 676 { |
| 826 | 677 Lisp_Object code = get_char_table (ch, syntax_table); |
| 428 | 678 Lisp_Object code2 = code; |
| 679 | |
| 680 if (CONSP (code)) | |
| 681 code2 = XCAR (code); | |
| 682 if (SYNTAX_FROM_CODE (XINT (code2)) == Sinherit) | |
| 826 | 683 code = get_char_table (ch, Vstandard_syntax_table); |
| 428 | 684 |
| 685 return CONSP (code) ? XCDR (code) : Qnil; | |
| 686 } | |
| 687 | |
| 688 DEFUN ("matching-paren", Fmatching_paren, 1, 2, 0, /* | |
| 444 | 689 Return the matching parenthesis of CHARACTER, or nil if none. |
| 690 Optional second argument SYNTAX-TABLE defaults to the current buffer's | |
| 428 | 691 syntax table. |
| 692 */ | |
| 444 | 693 (character, syntax_table)) |
| 428 | 694 { |
| 826 | 695 Lisp_Object mirrortab; |
| 1315 | 696 enum syntaxcode code; |
| 428 | 697 |
| 444 | 698 CHECK_CHAR_COERCE_INT (character); |
| 826 | 699 syntax_table = check_syntax_table (syntax_table, |
| 700 current_buffer->syntax_table); | |
| 701 mirrortab = XCHAR_TABLE (syntax_table)->mirror_table; | |
| 444 | 702 code = SYNTAX (mirrortab, XCHAR (character)); |
| 428 | 703 if (code == Sopen || code == Sclose || code == Sstring) |
| 444 | 704 return syntax_match (syntax_table, XCHAR (character)); |
| 428 | 705 return Qnil; |
| 706 } | |
| 707 | |
| 708 | |
| 709 | |
| 710 #ifdef MULE | |
| 711 /* Return 1 if there is a word boundary between two word-constituent | |
| 712 characters C1 and C2 if they appear in this order, else return 0. | |
| 713 There is no word boundary between two word-constituent ASCII | |
| 714 characters. */ | |
| 715 #define WORD_BOUNDARY_P(c1, c2) \ | |
| 867 | 716 (!(ichar_ascii_p (c1) && ichar_ascii_p (c2)) \ |
| 428 | 717 && word_boundary_p (c1, c2)) |
| 718 #endif | |
| 719 | |
| 720 /* Return the position across COUNT words from FROM. | |
| 721 If that many words cannot be found before the end of the buffer, return 0. | |
| 722 COUNT negative means scan backward and stop at word beginning. */ | |
| 723 | |
| 665 | 724 Charbpos |
| 725 scan_words (struct buffer *buf, Charbpos from, int count) | |
| 428 | 726 { |
| 665 | 727 Charbpos limit = count > 0 ? BUF_ZV (buf) : BUF_BEGV (buf); |
| 867 | 728 Ichar ch0, ch1; |
| 428 | 729 enum syntaxcode code; |
| 826 | 730 struct syntax_cache *scache = setup_buffer_syntax_cache (buf, from, count); |
| 460 | 731 |
| 428 | 732 /* #### is it really worth it to hand expand both cases? JV */ |
| 733 while (count > 0) | |
| 734 { | |
| 735 QUIT; | |
| 736 | |
| 737 while (1) | |
| 738 { | |
| 739 if (from == limit) | |
| 740 return 0; | |
| 741 | |
| 826 | 742 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 743 ch0 = BUF_FETCH_CHAR (buf, from); |
| 826 | 744 code = SYNTAX_FROM_CACHE (scache, ch0); |
| 428 | 745 |
| 442 | 746 from++; |
| 428 | 747 if (words_include_escapes |
| 748 && (code == Sescape || code == Scharquote)) | |
| 749 break; | |
| 750 if (code == Sword) | |
| 751 break; | |
| 752 } | |
| 753 | |
| 754 QUIT; | |
| 755 | |
| 756 while (from != limit) | |
| 757 { | |
| 826 | 758 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 759 ch1 = BUF_FETCH_CHAR (buf, from); |
| 826 | 760 code = SYNTAX_FROM_CACHE (scache, ch1); |
| 428 | 761 if (!(words_include_escapes |
| 762 && (code == Sescape || code == Scharquote))) | |
| 763 if (code != Sword | |
| 764 #ifdef MULE | |
| 765 || WORD_BOUNDARY_P (ch0, ch1) | |
| 434 | 766 #endif |
| 428 | 767 ) |
| 768 break; | |
| 769 #ifdef MULE | |
| 770 ch0 = ch1; | |
| 434 | 771 #endif |
| 428 | 772 from++; |
| 773 } | |
| 774 count--; | |
| 775 } | |
| 776 | |
| 777 while (count < 0) | |
| 778 { | |
| 779 QUIT; | |
| 780 | |
| 781 while (1) | |
| 782 { | |
| 783 if (from == limit) | |
| 784 return 0; | |
| 785 | |
| 826 | 786 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 428 | 787 ch1 = BUF_FETCH_CHAR (buf, from - 1); |
| 826 | 788 code = SYNTAX_FROM_CACHE (scache, ch1); |
| 460 | 789 from--; |
| 442 | 790 |
| 428 | 791 if (words_include_escapes |
| 792 && (code == Sescape || code == Scharquote)) | |
| 793 break; | |
| 794 if (code == Sword) | |
| 795 break; | |
| 796 } | |
| 797 | |
| 798 QUIT; | |
| 799 | |
| 800 while (from != limit) | |
| 801 { | |
| 826 | 802 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 428 | 803 ch0 = BUF_FETCH_CHAR (buf, from - 1); |
| 826 | 804 code = SYNTAX_FROM_CACHE (scache, ch0); |
| 460 | 805 |
| 428 | 806 if (!(words_include_escapes |
| 807 && (code == Sescape || code == Scharquote))) | |
| 808 if (code != Sword | |
| 809 #ifdef MULE | |
| 810 || WORD_BOUNDARY_P (ch0, ch1) | |
| 811 #endif | |
| 812 ) | |
| 813 break; | |
| 814 #ifdef MULE | |
| 815 ch1 = ch0; | |
| 816 #endif | |
| 817 from--; | |
| 818 } | |
| 819 count++; | |
| 820 } | |
| 821 | |
| 822 return from; | |
| 823 } | |
| 824 | |
| 446 | 825 DEFUN ("forward-word", Fforward_word, 0, 2, "_p", /* |
| 428 | 826 Move point forward COUNT words (backward if COUNT is negative). |
| 446 | 827 Normally t is returned, but if an edge of the buffer is reached, |
| 828 point is left there and nil is returned. | |
| 428 | 829 |
| 462 | 830 The characters that are moved over may be added to the current selection |
| 831 \(i.e. active region) if the Shift key is held down, a motion key is used | |
| 832 to invoke this command, and `shifted-motion-keys-select-region' is t; see | |
| 833 the documentation for this variable for more details. | |
| 834 | |
| 446 | 835 COUNT defaults to 1, and BUFFER defaults to the current buffer. |
| 428 | 836 */ |
| 837 (count, buffer)) | |
| 838 { | |
| 665 | 839 Charbpos val; |
| 428 | 840 struct buffer *buf = decode_buffer (buffer, 0); |
| 446 | 841 EMACS_INT n; |
| 842 | |
| 843 if (NILP (count)) | |
| 844 n = 1; | |
| 845 else | |
| 846 { | |
| 847 CHECK_INT (count); | |
| 848 n = XINT (count); | |
| 849 } | |
| 428 | 850 |
| 446 | 851 val = scan_words (buf, BUF_PT (buf), n); |
| 852 if (val) | |
| 428 | 853 { |
| 446 | 854 BUF_SET_PT (buf, val); |
| 855 return Qt; | |
| 856 } | |
| 857 else | |
| 858 { | |
| 859 BUF_SET_PT (buf, n > 0 ? BUF_ZV (buf) : BUF_BEGV (buf)); | |
| 428 | 860 return Qnil; |
| 861 } | |
| 862 } | |
| 863 | |
| 864 static void scan_sexps_forward (struct buffer *buf, | |
| 865 struct lisp_parse_state *, | |
| 665 | 866 Charbpos from, Charbpos end, |
| 428 | 867 int targetdepth, int stopbefore, |
| 868 Lisp_Object oldstate, | |
| 869 int commentstop); | |
| 870 | |
| 871 static int | |
| 665 | 872 find_start_of_comment (struct buffer *buf, Charbpos from, Charbpos stop, |
| 460 | 873 int comstyle) |
| 428 | 874 { |
| 867 | 875 Ichar c; |
| 428 | 876 enum syntaxcode code; |
| 877 | |
| 878 /* Look back, counting the parity of string-quotes, | |
| 879 and recording the comment-starters seen. | |
| 880 When we reach a safe place, assume that's not in a string; | |
| 881 then step the main scan to the earliest comment-starter seen | |
| 882 an even number of string quotes away from the safe place. | |
| 883 | |
| 884 OFROM[I] is position of the earliest comment-starter seen | |
| 885 which is I+2X quotes from the comment-end. | |
| 886 PARITY is current parity of quotes from the comment end. */ | |
| 887 int parity = 0; | |
| 867 | 888 Ichar my_stringend = 0; |
| 428 | 889 int string_lossage = 0; |
| 665 | 890 Charbpos comment_end = from; |
| 891 Charbpos comstart_pos = 0; | |
| 428 | 892 int comstart_parity = 0; |
| 893 int styles_match_p = 0; | |
| 460 | 894 /* mask to match comment styles against; for ST_COMMENT_STYLE, this |
| 895 will get set to SYNTAX_COMMENT_STYLE_B, but never get checked */ | |
| 896 int mask = comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A; | |
| 826 | 897 struct syntax_cache *scache = buf->syntax_cache; |
| 428 | 898 |
| 899 /* At beginning of range to scan, we're outside of strings; | |
| 900 that determines quote parity to the comment-end. */ | |
| 901 while (from != stop) | |
| 902 { | |
| 460 | 903 int syncode; |
| 904 | |
| 428 | 905 /* Move back and examine a character. */ |
| 906 from--; | |
| 826 | 907 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 428 | 908 |
| 909 c = BUF_FETCH_CHAR (buf, from); | |
| 826 | 910 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 911 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 912 |
| 913 /* is this a 1-char comment end sequence? if so, try | |
| 914 to see if style matches previously extracted mask */ | |
| 915 if (code == Sendcomment) | |
| 916 { | |
| 917 styles_match_p = | |
| 460 | 918 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) & mask; |
| 428 | 919 } |
| 920 | |
| 921 /* or are we looking at a 1-char comment start sequence | |
| 922 of the style matching mask? */ | |
| 460 | 923 else if (code == Scomment) |
| 428 | 924 { |
| 460 | 925 styles_match_p = |
| 926 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) & mask; | |
| 428 | 927 } |
| 928 | |
| 460 | 929 /* otherwise, is this a 2-char comment end or start sequence? */ |
| 930 else if (from > stop) | |
| 931 do | |
| 932 { | |
| 933 /* 2-char comment end sequence? */ | |
| 934 if (SYNTAX_CODE_END_SECOND_P (syncode)) | |
| 935 { | |
| 936 int prev_syncode; | |
| 826 | 937 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 460 | 938 prev_syncode = |
| 1315 | 939 SYNTAX_CODE_FROM_CACHE (scache, |
| 940 BUF_FETCH_CHAR (buf, from - 1)); | |
| 460 | 941 |
| 942 if (SYNTAX_CODES_END_P (prev_syncode, syncode)) | |
| 943 { | |
| 944 code = Sendcomment; | |
| 945 styles_match_p = | |
| 826 | 946 SYNTAX_CODES_COMMENT_MASK_END (prev_syncode, |
| 947 syncode) & mask; | |
| 460 | 948 from--; |
| 826 | 949 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 460 | 950 c = BUF_FETCH_CHAR (buf, from); |
| 951 | |
| 952 /* Found a comment-end sequence, so skip past the | |
| 953 check for a comment-start */ | |
| 954 break; | |
| 955 } | |
| 956 } | |
| 957 | |
| 958 /* 2-char comment start sequence? */ | |
| 959 if (SYNTAX_CODE_START_SECOND_P (syncode)) | |
| 960 { | |
| 961 int prev_syncode; | |
| 826 | 962 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 460 | 963 prev_syncode = |
| 1315 | 964 SYNTAX_CODE_FROM_CACHE (scache, |
| 965 BUF_FETCH_CHAR (buf, from - 1)); | |
| 460 | 966 |
| 967 if (SYNTAX_CODES_START_P (prev_syncode, syncode)) | |
| 968 { | |
| 969 code = Scomment; | |
| 970 styles_match_p = | |
| 826 | 971 SYNTAX_CODES_COMMENT_MASK_START (prev_syncode, |
| 972 syncode) & mask; | |
| 460 | 973 from--; |
| 826 | 974 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 460 | 975 c = BUF_FETCH_CHAR (buf, from); |
| 976 } | |
| 977 } | |
| 978 } while (0); | |
| 428 | 979 |
| 980 /* Ignore escaped characters. */ | |
| 981 if (char_quoted (buf, from)) | |
| 982 continue; | |
| 983 | |
| 984 /* Track parity of quotes. */ | |
| 985 if (code == Sstring) | |
| 986 { | |
| 987 parity ^= 1; | |
| 988 if (my_stringend == 0) | |
| 989 my_stringend = c; | |
| 990 /* If we have two kinds of string delimiters. | |
| 991 There's no way to grok this scanning backwards. */ | |
| 992 else if (my_stringend != c) | |
| 993 string_lossage = 1; | |
| 994 } | |
| 995 | |
| 460 | 996 if (code == Sstring_fence || code == Scomment_fence) |
| 997 { | |
| 998 parity ^= 1; | |
| 999 if (my_stringend == 0) | |
| 1000 my_stringend = | |
| 1001 code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE; | |
| 1002 /* If we have two kinds of string delimiters. | |
| 1003 There's no way to grok this scanning backwards. */ | |
| 1004 else if (my_stringend != (code == Sstring_fence | |
| 1005 ? ST_STRING_STYLE : ST_COMMENT_STYLE)) | |
| 1006 string_lossage = 1; | |
| 1007 } | |
| 1008 | |
| 428 | 1009 /* Record comment-starters according to that |
| 1010 quote-parity to the comment-end. */ | |
| 1011 if (code == Scomment && styles_match_p) | |
| 1012 { | |
| 1013 comstart_parity = parity; | |
| 1014 comstart_pos = from; | |
| 1015 } | |
| 1016 | |
| 1017 /* If we find another earlier comment-ender, | |
| 1018 any comment-starts earlier than that don't count | |
| 1019 (because they go with the earlier comment-ender). */ | |
| 1020 if (code == Sendcomment && styles_match_p) | |
| 1021 break; | |
| 1022 | |
| 1023 /* Assume a defun-start point is outside of strings. */ | |
| 1024 if (code == Sopen | |
| 1025 && (from == stop || BUF_FETCH_CHAR (buf, from - 1) == '\n')) | |
| 1026 break; | |
| 1027 } | |
| 1028 | |
| 1029 if (comstart_pos == 0) | |
| 1030 from = comment_end; | |
| 1031 /* If the earliest comment starter | |
| 1032 is followed by uniform paired string quotes or none, | |
| 1033 we know it can't be inside a string | |
| 1034 since if it were then the comment ender would be inside one. | |
| 1035 So it does start a comment. Skip back to it. */ | |
| 1036 else if (comstart_parity == 0 && !string_lossage) | |
| 1037 from = comstart_pos; | |
| 1038 else | |
| 1039 { | |
| 1040 /* We had two kinds of string delimiters mixed up | |
| 1041 together. Decode this going forwards. | |
| 1042 Scan fwd from the previous comment ender | |
| 1043 to the one in question; this records where we | |
| 1044 last passed a comment starter. */ | |
| 1045 | |
| 1046 struct lisp_parse_state state; | |
| 1047 scan_sexps_forward (buf, &state, find_defun_start (buf, comment_end), | |
| 1048 comment_end - 1, -10000, 0, Qnil, 0); | |
| 1049 if (state.incomment) | |
| 460 | 1050 from = state.comstr_start; |
| 428 | 1051 else |
| 1052 /* We can't grok this as a comment; scan it normally. */ | |
| 1053 from = comment_end; | |
| 826 | 1054 UPDATE_SYNTAX_CACHE_FORWARD (scache, from - 1); |
| 428 | 1055 } |
| 1056 return from; | |
| 1057 } | |
| 1058 | |
| 665 | 1059 static Charbpos |
| 826 | 1060 find_end_of_comment (struct buffer *buf, Charbpos from, Charbpos stop, |
| 1061 int comstyle) | |
| 428 | 1062 { |
| 1063 int c; | |
| 460 | 1064 int prev_code; |
| 1065 /* mask to match comment styles against; for ST_COMMENT_STYLE, this | |
| 1066 will get set to SYNTAX_COMMENT_STYLE_B, but never get checked */ | |
| 1067 int mask = comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A; | |
| 826 | 1068 struct syntax_cache *scache = buf->syntax_cache; |
| 428 | 1069 |
| 460 | 1070 /* This is only called by functions which have already set up the |
| 1071 syntax_cache and are keeping it up-to-date */ | |
| 428 | 1072 while (1) |
| 1073 { | |
| 1074 if (from == stop) | |
| 1075 { | |
| 1076 return -1; | |
| 1077 } | |
| 460 | 1078 |
| 826 | 1079 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1080 c = BUF_FETCH_CHAR (buf, from); |
| 460 | 1081 |
| 1082 /* Test for generic comments */ | |
| 1083 if (comstyle == ST_COMMENT_STYLE) | |
| 1084 { | |
| 826 | 1085 if (SYNTAX_FROM_CACHE (scache, c) == Scomment_fence) |
| 460 | 1086 { |
| 1087 from++; | |
| 826 | 1088 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1089 break; |
| 1090 } | |
| 1091 from++; | |
| 1092 continue; /* No need to test other comment styles in a | |
| 1093 generic comment */ | |
| 1094 } | |
| 1095 else | |
| 1096 | |
| 826 | 1097 if (SYNTAX_FROM_CACHE (scache, c) == Sendcomment |
| 460 | 1098 && SYNTAX_CODE_MATCHES_1CHAR_P |
| 826 | 1099 (SYNTAX_CODE_FROM_CACHE (scache, c), mask)) |
| 428 | 1100 /* we have encountered a comment end of the same style |
| 1101 as the comment sequence which began this comment | |
| 1102 section */ | |
| 460 | 1103 { |
| 1104 from++; | |
| 826 | 1105 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1106 break; |
| 1107 } | |
| 428 | 1108 |
| 826 | 1109 prev_code = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 428 | 1110 from++; |
| 826 | 1111 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1112 if (from < stop |
| 460 | 1113 && SYNTAX_CODES_MATCH_END_P |
| 1114 (prev_code, | |
| 826 | 1115 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from)), |
| 460 | 1116 mask) |
| 1117 | |
| 1118 ) | |
| 428 | 1119 /* we have encountered a comment end of the same style |
| 1120 as the comment sequence which began this comment | |
| 1121 section */ | |
| 460 | 1122 { |
| 1123 from++; | |
| 826 | 1124 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1125 break; |
| 1126 } | |
| 428 | 1127 } |
| 1128 return from; | |
| 1129 } | |
| 1130 | |
| 1131 | |
| 1132 /* #### between FSF 19.23 and 19.28 there are some changes to the logic | |
| 1133 in this function (and minor changes to find_start_of_comment(), | |
| 1134 above, which is part of Fforward_comment() in FSF). Attempts to port | |
| 1135 that logic made this function break, so I'm leaving it out. If anyone | |
| 1136 ever complains about this function not working properly, take a look | |
| 1137 at those changes. --ben */ | |
| 1138 | |
| 446 | 1139 DEFUN ("forward-comment", Fforward_comment, 0, 2, 0, /* |
| 444 | 1140 Move forward across up to COUNT comments, or backwards if COUNT is negative. |
| 428 | 1141 Stop scanning if we find something other than a comment or whitespace. |
| 1142 Set point to where scanning stops. | |
| 444 | 1143 If COUNT comments are found as expected, with nothing except whitespace |
| 428 | 1144 between them, return t; otherwise return nil. |
| 1145 Point is set in either case. | |
| 446 | 1146 COUNT defaults to 1, and BUFFER defaults to the current buffer. |
| 428 | 1147 */ |
| 444 | 1148 (count, buffer)) |
| 428 | 1149 { |
| 665 | 1150 Charbpos from; |
| 1151 Charbpos stop; | |
| 867 | 1152 Ichar c; |
| 428 | 1153 enum syntaxcode code; |
| 460 | 1154 int syncode; |
| 444 | 1155 EMACS_INT n; |
| 428 | 1156 struct buffer *buf = decode_buffer (buffer, 0); |
| 826 | 1157 struct syntax_cache *scache; |
| 1158 | |
| 446 | 1159 if (NILP (count)) |
| 1160 n = 1; | |
| 1161 else | |
| 1162 { | |
| 1163 CHECK_INT (count); | |
| 1164 n = XINT (count); | |
| 1165 } | |
| 428 | 1166 |
| 1167 from = BUF_PT (buf); | |
| 1168 | |
| 826 | 1169 scache = setup_buffer_syntax_cache (buf, from, n); |
| 444 | 1170 while (n > 0) |
| 428 | 1171 { |
| 1172 QUIT; | |
| 1173 | |
| 1174 stop = BUF_ZV (buf); | |
| 1175 while (from < stop) | |
| 1176 { | |
| 460 | 1177 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1178 |
| 1179 if (char_quoted (buf, from)) | |
| 1180 { | |
| 1181 from++; | |
| 1182 continue; | |
| 1183 } | |
| 1184 | |
| 826 | 1185 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1186 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 1187 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1188 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1189 |
| 1190 if (code == Scomment) | |
| 1191 { | |
| 1192 /* we have encountered a single character comment start | |
| 1193 sequence, and we are ignoring all text inside comments. | |
| 1194 we must record the comment style this character begins | |
| 1195 so that later, only a comment end of the same style actually | |
| 1196 ends the comment section */ | |
| 460 | 1197 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) |
| 1198 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1199 } |
| 1200 | |
| 460 | 1201 else if (code == Scomment_fence) |
| 1202 { | |
| 1203 from++; | |
| 1204 code = Scomment; | |
| 1205 comstyle = ST_COMMENT_STYLE; | |
| 1206 } | |
| 1207 | |
| 428 | 1208 else if (from < stop |
| 460 | 1209 && SYNTAX_CODE_START_FIRST_P (syncode)) |
| 428 | 1210 { |
| 460 | 1211 int next_syncode; |
| 826 | 1212 UPDATE_SYNTAX_CACHE_FORWARD (scache, from + 1); |
| 460 | 1213 next_syncode = |
| 826 | 1214 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from + 1)); |
| 460 | 1215 |
| 1216 if (SYNTAX_CODES_START_P (syncode, next_syncode)) | |
| 1217 { | |
| 1218 /* we have encountered a 2char comment start sequence and we | |
| 1219 are ignoring all text inside comments. we must record | |
| 1220 the comment style this sequence begins so that later, | |
| 1221 only a comment end of the same style actually ends | |
| 1222 the comment section */ | |
| 1223 code = Scomment; | |
| 1224 comstyle = | |
| 1225 SYNTAX_CODES_COMMENT_MASK_START (syncode, next_syncode) | |
| 1226 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1227 from++; | |
| 1228 } | |
| 428 | 1229 } |
| 1230 | |
| 1231 if (code == Scomment) | |
| 1232 { | |
| 826 | 1233 Charbpos newfrom = find_end_of_comment (buf, from, stop, |
| 1234 comstyle); | |
| 428 | 1235 if (newfrom < 0) |
| 1236 { | |
| 1237 /* we stopped because from==stop */ | |
| 1238 BUF_SET_PT (buf, stop); | |
| 1239 return Qnil; | |
| 1240 } | |
| 1241 from = newfrom; | |
| 1242 | |
| 1243 /* We have skipped one comment. */ | |
| 1244 break; | |
| 1245 } | |
| 1246 else if (code != Swhitespace | |
| 1247 && code != Sendcomment | |
| 1248 && code != Scomment ) | |
| 1249 { | |
| 1250 BUF_SET_PT (buf, from); | |
| 1251 return Qnil; | |
| 1252 } | |
| 1253 from++; | |
| 1254 } | |
| 1255 | |
| 1256 /* End of comment reached */ | |
| 444 | 1257 n--; |
| 428 | 1258 } |
| 1259 | |
| 444 | 1260 while (n < 0) |
| 428 | 1261 { |
| 1262 QUIT; | |
| 1263 | |
| 1264 stop = BUF_BEGV (buf); | |
| 1265 while (from > stop) | |
| 1266 { | |
| 460 | 1267 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1268 |
| 1269 from--; | |
| 1270 if (char_quoted (buf, from)) | |
| 1271 { | |
| 1272 from--; | |
| 1273 continue; | |
| 1274 } | |
| 1275 | |
| 1276 c = BUF_FETCH_CHAR (buf, from); | |
| 826 | 1277 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1278 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1279 |
| 1280 if (code == Sendcomment) | |
| 1281 { | |
| 1282 /* we have found a single char end comment. we must record | |
| 1283 the comment style encountered so that later, we can match | |
| 1284 only the proper comment begin sequence of the same style */ | |
| 460 | 1285 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) |
| 1286 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1287 } | |
| 1288 | |
| 1289 else if (code == Scomment_fence) | |
| 1290 { | |
| 1291 code = Sendcomment; | |
| 1292 comstyle = ST_COMMENT_STYLE; | |
| 428 | 1293 } |
| 1294 | |
| 1295 else if (from > stop | |
| 460 | 1296 && SYNTAX_CODE_END_SECOND_P (syncode)) |
| 428 | 1297 { |
| 460 | 1298 int prev_syncode; |
| 826 | 1299 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 460 | 1300 prev_syncode = |
| 826 | 1301 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from - 1)); |
| 460 | 1302 if (SYNTAX_CODES_END_P (prev_syncode, syncode)) |
| 1303 { | |
| 1304 /* We must record the comment style encountered so that | |
| 1305 later, we can match only the proper comment begin | |
| 1306 sequence of the same style. */ | |
| 1307 code = Sendcomment; | |
| 1308 comstyle = SYNTAX_CODES_COMMENT_MASK_END | |
| 1309 (prev_syncode, syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1310 from--; | |
| 1311 } | |
| 428 | 1312 } |
| 1313 | |
| 1314 if (code == Sendcomment) | |
| 1315 { | |
| 460 | 1316 from = find_start_of_comment (buf, from, stop, comstyle); |
| 428 | 1317 break; |
| 1318 } | |
| 1319 | |
| 1320 else if (code != Swhitespace | |
| 460 | 1321 && code != Scomment |
| 1322 && code != Sendcomment) | |
| 428 | 1323 { |
| 1324 BUF_SET_PT (buf, from + 1); | |
| 1325 return Qnil; | |
| 1326 } | |
| 1327 } | |
| 1328 | |
| 444 | 1329 n++; |
| 428 | 1330 } |
| 1331 | |
| 1332 BUF_SET_PT (buf, from); | |
| 1333 return Qt; | |
| 1334 } | |
| 1335 | |
| 1336 | |
| 1337 Lisp_Object | |
| 665 | 1338 scan_lists (struct buffer *buf, Charbpos from, int count, int depth, |
| 444 | 1339 int sexpflag, int noerror) |
| 428 | 1340 { |
| 665 | 1341 Charbpos stop; |
| 867 | 1342 Ichar c; |
| 428 | 1343 int quoted; |
| 1344 int mathexit = 0; | |
| 1345 enum syntaxcode code; | |
| 460 | 1346 int syncode; |
| 428 | 1347 int min_depth = depth; /* Err out if depth gets less than this. */ |
| 826 | 1348 struct syntax_cache *scache; |
|
4912
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use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1349 Charbpos last_good = from; |
| 826 | 1350 |
| 428 | 1351 if (depth > 0) min_depth = 0; |
| 1352 | |
| 826 | 1353 scache = setup_buffer_syntax_cache (buf, from, count); |
| 428 | 1354 while (count > 0) |
| 1355 { | |
| 1356 QUIT; | |
| 1357 | |
| 1358 stop = BUF_ZV (buf); | |
| 1359 while (from < stop) | |
| 1360 { | |
| 460 | 1361 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1362 |
| 826 | 1363 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1364 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 1365 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1366 code = SYNTAX_FROM_CODE (syncode); | |
|
4912
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1367 if (depth == min_depth) |
|
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1368 last_good = from; |
| 428 | 1369 from++; |
| 1370 | |
| 1371 /* a 1-char comment start sequence */ | |
| 1372 if (code == Scomment && parse_sexp_ignore_comments) | |
| 1373 { | |
| 460 | 1374 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) == |
| 1375 SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1376 } |
| 1377 | |
| 1378 /* else, a 2-char comment start sequence? */ | |
| 1379 else if (from < stop | |
| 460 | 1380 && SYNTAX_CODE_START_FIRST_P (syncode) |
| 428 | 1381 && parse_sexp_ignore_comments) |
| 1382 { | |
| 460 | 1383 int next_syncode; |
| 826 | 1384 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1385 next_syncode = |
| 826 | 1386 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from)); |
| 460 | 1387 |
| 1388 if (SYNTAX_CODES_START_P (syncode, next_syncode)) | |
| 1389 { | |
| 826 | 1390 /* we have encountered a comment start sequence and we |
| 1391 are ignoring all text inside comments. we must record | |
| 1392 the comment style this sequence begins so that later, | |
| 1393 only a comment end of the same style actually ends | |
| 1394 the comment section */ | |
| 1395 code = Scomment; | |
| 460 | 1396 comstyle = SYNTAX_CODES_COMMENT_MASK_START |
| 1397 (syncode, next_syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 826 | 1398 from++; |
| 1399 } | |
| 428 | 1400 } |
| 826 | 1401 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1402 |
| 460 | 1403 if (SYNTAX_CODE_PREFIX (syncode)) |
| 428 | 1404 continue; |
| 1405 | |
| 1406 switch (code) | |
| 1407 { | |
| 1408 case Sescape: | |
| 1409 case Scharquote: | |
| 1410 if (from == stop) goto lose; | |
| 1411 from++; | |
| 1412 /* treat following character as a word constituent */ | |
| 1413 case Sword: | |
| 1414 case Ssymbol: | |
| 1415 if (depth || !sexpflag) break; | |
| 1416 /* This word counts as a sexp; return at end of it. */ | |
| 1417 while (from < stop) | |
| 1418 { | |
| 826 | 1419 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 1420 switch (SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from))) | |
| 428 | 1421 { |
| 1422 case Scharquote: | |
| 1423 case Sescape: | |
| 1424 from++; | |
| 1425 if (from == stop) goto lose; | |
| 1426 break; | |
| 1427 case Sword: | |
| 1428 case Ssymbol: | |
| 1429 case Squote: | |
| 1430 break; | |
| 1431 default: | |
| 1432 goto done; | |
| 1433 } | |
| 1434 from++; | |
| 1435 } | |
| 1436 goto done; | |
| 1437 | |
| 460 | 1438 case Scomment_fence: |
| 1439 comstyle = ST_COMMENT_STYLE; | |
| 428 | 1440 case Scomment: |
| 1441 if (!parse_sexp_ignore_comments) | |
| 1442 break; | |
| 826 | 1443 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1444 { |
| 665 | 1445 Charbpos newfrom = |
| 460 | 1446 find_end_of_comment (buf, from, stop, comstyle); |
| 428 | 1447 if (newfrom < 0) |
| 1448 { | |
| 1449 /* we stopped because from == stop in search forward */ | |
| 1450 from = stop; | |
| 1451 if (depth == 0) | |
| 1452 goto done; | |
| 1453 goto lose; | |
| 1454 } | |
| 1455 from = newfrom; | |
| 1456 } | |
| 1457 break; | |
| 1458 | |
| 1459 case Smath: | |
| 1460 if (!sexpflag) | |
| 1461 break; | |
| 1462 if (from != stop && c == BUF_FETCH_CHAR (buf, from)) | |
| 1463 from++; | |
| 1464 if (mathexit) | |
| 1465 { | |
| 1466 mathexit = 0; | |
| 1467 goto close1; | |
| 1468 } | |
| 1469 mathexit = 1; | |
| 1470 | |
| 1471 case Sopen: | |
| 1472 if (!++depth) goto done; | |
| 1473 break; | |
| 1474 | |
| 1475 case Sclose: | |
| 1476 close1: | |
| 1477 if (!--depth) goto done; | |
| 1478 if (depth < min_depth) | |
| 1479 { | |
| 444 | 1480 if (noerror) |
| 428 | 1481 return Qnil; |
|
4912
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1482 signal_error_2 (Qscan_error, |
|
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1483 "Containing expression ends prematurely", |
|
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1484 make_int (last_good), make_int (from)); |
| 428 | 1485 } |
| 1486 break; | |
| 1487 | |
| 460 | 1488 case Sstring_fence: |
| 428 | 1489 case Sstring: |
| 1490 { | |
| 867 | 1491 Ichar stringterm; |
| 460 | 1492 |
| 1493 if (code != Sstring_fence) | |
| 1494 { | |
| 826 | 1495 /* XEmacs change: call syntax_match on character */ |
| 867 | 1496 Ichar ch = BUF_FETCH_CHAR (buf, from - 1); |
| 460 | 1497 Lisp_Object stermobj = |
| 1296 | 1498 syntax_match (scache->syntax_table, ch); |
| 428 | 1499 |
| 1500 if (CHARP (stermobj)) | |
| 1501 stringterm = XCHAR (stermobj); | |
| 1502 else | |
| 1503 stringterm = ch; | |
| 460 | 1504 } |
| 1505 else | |
| 1506 stringterm = '\0'; /* avoid compiler warnings */ | |
| 428 | 1507 |
| 1508 while (1) | |
| 1509 { | |
| 1510 if (from >= stop) | |
| 1511 goto lose; | |
| 826 | 1512 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1513 c = BUF_FETCH_CHAR (buf, from); |
| 1514 if (code == Sstring | |
| 1515 ? c == stringterm | |
| 826 | 1516 : SYNTAX_FROM_CACHE (scache, c) == Sstring_fence) |
| 428 | 1517 break; |
| 460 | 1518 |
| 826 | 1519 switch (SYNTAX_FROM_CACHE (scache, c)) |
| 428 | 1520 { |
| 1521 case Scharquote: | |
| 1522 case Sescape: | |
| 1523 from++; | |
| 1524 break; | |
| 1525 default: | |
| 1526 break; | |
| 1527 } | |
| 1528 from++; | |
| 1529 } | |
| 1530 from++; | |
| 1531 if (!depth && sexpflag) goto done; | |
| 1532 break; | |
| 1533 } | |
| 1534 | |
| 1535 default: | |
| 1536 break; | |
| 1537 } | |
| 1538 } | |
| 1539 | |
| 1540 /* Reached end of buffer. Error if within object, | |
| 1541 return nil if between */ | |
| 1542 if (depth) goto lose; | |
| 1543 | |
| 1544 return Qnil; | |
| 1545 | |
| 1546 /* End of object reached */ | |
| 1547 done: | |
| 1548 count--; | |
| 1549 } | |
| 1550 | |
| 1551 while (count < 0) | |
| 1552 { | |
| 1553 QUIT; | |
| 1554 | |
| 1555 stop = BUF_BEGV (buf); | |
| 1556 while (from > stop) | |
| 1557 { | |
| 460 | 1558 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1559 |
| 1560 from--; | |
| 826 | 1561 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 428 | 1562 quoted = char_quoted (buf, from); |
| 1563 if (quoted) | |
| 460 | 1564 { |
| 428 | 1565 from--; |
| 826 | 1566 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 460 | 1567 } |
| 428 | 1568 |
| 1569 c = BUF_FETCH_CHAR (buf, from); | |
| 826 | 1570 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1571 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1572 |
| 1573 if (code == Sendcomment && parse_sexp_ignore_comments) | |
| 1574 { | |
| 1575 /* we have found a single char end comment. we must record | |
| 1576 the comment style encountered so that later, we can match | |
| 1577 only the proper comment begin sequence of the same style */ | |
| 460 | 1578 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) |
| 1579 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1580 } |
| 1581 | |
| 1582 else if (from > stop | |
| 460 | 1583 && SYNTAX_CODE_END_SECOND_P (syncode) |
| 428 | 1584 && !char_quoted (buf, from - 1) |
| 1585 && parse_sexp_ignore_comments) | |
| 1586 { | |
| 460 | 1587 int prev_syncode; |
| 826 | 1588 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 1589 prev_syncode = | |
| 1590 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from - 1)); | |
| 460 | 1591 |
| 1592 if (SYNTAX_CODES_END_P (prev_syncode, syncode)) | |
| 1593 { | |
| 428 | 1594 /* we must record the comment style encountered so that |
| 1595 later, we can match only the proper comment begin | |
| 1596 sequence of the same style */ | |
| 1597 code = Sendcomment; | |
| 460 | 1598 comstyle = SYNTAX_CODES_COMMENT_MASK_END |
| 1599 (prev_syncode, syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1600 from--; |
| 1601 } | |
| 460 | 1602 } |
| 428 | 1603 |
| 460 | 1604 if (SYNTAX_CODE_PREFIX (syncode)) |
| 428 | 1605 continue; |
| 1606 | |
| 434 | 1607 switch (quoted ? Sword : code) |
| 428 | 1608 { |
| 1609 case Sword: | |
| 1610 case Ssymbol: | |
| 1611 if (depth || !sexpflag) break; | |
| 1612 /* This word counts as a sexp; count object finished after | |
| 1613 passing it. */ | |
| 1614 while (from > stop) | |
| 1615 { | |
| 826 | 1616 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 428 | 1617 quoted = char_quoted (buf, from - 1); |
| 1618 | |
| 1619 if (quoted) | |
| 1620 from--; | |
| 1621 if (! (quoted | |
| 1622 || (syncode = | |
| 826 | 1623 SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, |
| 1624 from - 1))) | |
| 428 | 1625 == Sword |
| 1626 || syncode == Ssymbol | |
| 1627 || syncode == Squote)) | |
| 1628 goto done2; | |
| 1629 from--; | |
| 1630 } | |
| 1631 goto done2; | |
| 1632 | |
| 1633 case Smath: | |
| 1634 if (!sexpflag) | |
| 1635 break; | |
| 1636 if (from != stop && c == BUF_FETCH_CHAR (buf, from - 1)) | |
| 1637 from--; | |
| 1638 if (mathexit) | |
| 1639 { | |
| 1640 mathexit = 0; | |
| 1641 goto open2; | |
| 1642 } | |
| 1643 mathexit = 1; | |
| 1644 | |
| 1645 case Sclose: | |
| 1646 if (!++depth) goto done2; | |
| 1647 break; | |
| 1648 | |
| 1649 case Sopen: | |
| 1650 open2: | |
| 1651 if (!--depth) goto done2; | |
| 1652 if (depth < min_depth) | |
| 1653 { | |
| 444 | 1654 if (noerror) |
| 428 | 1655 return Qnil; |
|
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use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1656 signal_error_2 (Qscan_error, |
|
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1657 "Containing expression ends prematurely", |
|
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1658 make_int (last_good), make_int (from)); |
| 428 | 1659 } |
| 1660 break; | |
| 1661 | |
| 460 | 1662 case Scomment_fence: |
| 1663 comstyle = ST_COMMENT_STYLE; | |
| 428 | 1664 case Sendcomment: |
| 1665 if (parse_sexp_ignore_comments) | |
| 460 | 1666 from = find_start_of_comment (buf, from, stop, comstyle); |
| 428 | 1667 break; |
| 1668 | |
| 460 | 1669 case Sstring_fence: |
| 428 | 1670 case Sstring: |
| 1671 { | |
| 867 | 1672 Ichar stringterm; |
| 460 | 1673 |
| 1674 if (code != Sstring_fence) | |
| 1675 { | |
| 428 | 1676 /* XEmacs change: call syntax_match() on character */ |
| 867 | 1677 Ichar ch = BUF_FETCH_CHAR (buf, from); |
| 460 | 1678 Lisp_Object stermobj = |
| 1296 | 1679 syntax_match (scache->syntax_table, ch); |
| 428 | 1680 |
| 1681 if (CHARP (stermobj)) | |
| 1682 stringterm = XCHAR (stermobj); | |
| 1683 else | |
| 1684 stringterm = ch; | |
| 460 | 1685 } |
| 1686 else | |
| 1687 stringterm = '\0'; /* avoid compiler warnings */ | |
| 428 | 1688 |
| 1689 while (1) | |
| 1690 { | |
| 1691 if (from == stop) goto lose; | |
| 460 | 1692 |
| 826 | 1693 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 460 | 1694 c = BUF_FETCH_CHAR (buf, from - 1); |
| 1695 | |
| 1696 if ((code == Sstring | |
| 1697 ? c == stringterm | |
| 826 | 1698 : SYNTAX_FROM_CACHE (scache, c) == Sstring_fence) |
| 460 | 1699 && !char_quoted (buf, from - 1)) |
| 1700 { | |
| 428 | 1701 break; |
| 460 | 1702 } |
| 1703 | |
| 428 | 1704 from--; |
| 1705 } | |
| 1706 from--; | |
| 1707 if (!depth && sexpflag) goto done2; | |
| 1708 break; | |
| 1709 } | |
| 1710 } | |
| 1711 } | |
| 1712 | |
| 1713 /* Reached start of buffer. Error if within object, | |
| 1714 return nil if between */ | |
| 1715 if (depth) goto lose; | |
| 1716 | |
| 1717 return Qnil; | |
| 1718 | |
| 1719 done2: | |
| 1720 count++; | |
| 1721 } | |
| 1722 | |
| 1723 | |
| 1724 return (make_int (from)); | |
| 1725 | |
| 1726 lose: | |
| 444 | 1727 if (!noerror) |
|
4912
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use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1728 signal_error_2 (Qscan_error, "Unbalanced parentheses", |
|
e99033b7e05c
use more specific `scan-error' in scan-lists to be GNU compatible
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
1729 make_int (last_good), make_int (from)); |
| 428 | 1730 return Qnil; |
| 1731 } | |
| 1732 | |
| 1733 int | |
| 665 | 1734 char_quoted (struct buffer *buf, Charbpos pos) |
| 428 | 1735 { |
| 1736 enum syntaxcode code; | |
| 665 | 1737 Charbpos beg = BUF_BEGV (buf); |
| 428 | 1738 int quoted = 0; |
| 665 | 1739 Charbpos startpos = pos; |
| 826 | 1740 struct syntax_cache *scache = buf->syntax_cache; |
| 460 | 1741 |
| 1742 while (pos > beg) | |
| 1743 { | |
| 826 | 1744 UPDATE_SYNTAX_CACHE_BACKWARD (scache, pos - 1); |
| 1745 code = SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, pos - 1)); | |
| 428 | 1746 |
| 460 | 1747 if (code != Scharquote && code != Sescape) |
| 1748 break; | |
| 1749 pos--; | |
| 1750 quoted = !quoted; | |
| 1751 } | |
| 1752 | |
| 826 | 1753 UPDATE_SYNTAX_CACHE (scache, startpos); |
| 428 | 1754 return quoted; |
| 1755 } | |
| 1756 | |
| 1757 DEFUN ("scan-lists", Fscan_lists, 3, 5, 0, /* | |
| 1758 Scan from character number FROM by COUNT lists. | |
| 1759 Returns the character number of the position thus found. | |
| 1760 | |
| 1761 If DEPTH is nonzero, paren depth begins counting from that value, | |
| 1762 only places where the depth in parentheses becomes zero | |
| 1763 are candidates for stopping; COUNT such places are counted. | |
| 1764 Thus, a positive value for DEPTH means go out levels. | |
| 1765 | |
| 1766 Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
| 1767 | |
| 1768 If the beginning or end of (the accessible part of) the buffer is reached | |
| 1769 and the depth is wrong, an error is signaled. | |
| 1770 If the depth is right but the count is not used up, nil is returned. | |
| 1771 | |
| 1772 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead | |
| 1773 of in the current buffer. | |
| 1774 | |
| 1775 If optional arg NOERROR is non-nil, scan-lists will return nil instead of | |
| 1776 signalling an error. | |
| 1777 */ | |
| 444 | 1778 (from, count, depth, buffer, noerror)) |
| 428 | 1779 { |
| 1780 struct buffer *buf; | |
| 1781 | |
| 1782 CHECK_INT (from); | |
| 1783 CHECK_INT (count); | |
| 1784 CHECK_INT (depth); | |
| 1785 buf = decode_buffer (buffer, 0); | |
| 1786 | |
| 1787 return scan_lists (buf, XINT (from), XINT (count), XINT (depth), 0, | |
| 444 | 1788 !NILP (noerror)); |
| 428 | 1789 } |
| 1790 | |
| 1791 DEFUN ("scan-sexps", Fscan_sexps, 2, 4, 0, /* | |
| 1792 Scan from character number FROM by COUNT balanced expressions. | |
| 1793 If COUNT is negative, scan backwards. | |
| 1794 Returns the character number of the position thus found. | |
| 1795 | |
| 1796 Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
| 1797 | |
| 1798 If the beginning or end of (the accessible part of) the buffer is reached | |
| 1799 in the middle of a parenthetical grouping, an error is signaled. | |
| 1800 If the beginning or end is reached between groupings | |
| 1801 but before count is used up, nil is returned. | |
| 1802 | |
| 1803 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead | |
| 1804 of in the current buffer. | |
| 1805 | |
| 1806 If optional arg NOERROR is non-nil, scan-sexps will return nil instead of | |
| 1807 signalling an error. | |
| 1808 */ | |
| 444 | 1809 (from, count, buffer, noerror)) |
| 428 | 1810 { |
| 1811 struct buffer *buf = decode_buffer (buffer, 0); | |
| 1812 CHECK_INT (from); | |
| 1813 CHECK_INT (count); | |
| 1814 | |
| 444 | 1815 return scan_lists (buf, XINT (from), XINT (count), 0, 1, !NILP (noerror)); |
| 428 | 1816 } |
| 1817 | |
| 1818 DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, 0, 1, 0, /* | |
| 1819 Move point backward over any number of chars with prefix syntax. | |
| 1820 This includes chars with "quote" or "prefix" syntax (' or p). | |
| 1821 | |
| 1822 Optional arg BUFFER defaults to the current buffer. | |
| 1823 */ | |
| 1824 (buffer)) | |
| 1825 { | |
| 1826 struct buffer *buf = decode_buffer (buffer, 0); | |
| 665 | 1827 Charbpos beg = BUF_BEGV (buf); |
| 1828 Charbpos pos = BUF_PT (buf); | |
| 867 | 1829 Ichar c = '\0'; /* initialize to avoid compiler warnings */ |
| 826 | 1830 struct syntax_cache *scache; |
| 1831 | |
| 1832 scache = setup_buffer_syntax_cache (buf, pos, -1); | |
| 428 | 1833 |
| 1834 while (pos > beg && !char_quoted (buf, pos - 1) | |
| 460 | 1835 /* Previous statement updates syntax table. */ |
| 826 | 1836 && (SYNTAX_FROM_CACHE (scache, c = BUF_FETCH_CHAR (buf, pos - 1)) == Squote |
| 1837 || SYNTAX_CODE_PREFIX (SYNTAX_CODE_FROM_CACHE (scache, c)))) | |
| 428 | 1838 pos--; |
| 1839 | |
| 1840 BUF_SET_PT (buf, pos); | |
| 1841 | |
| 1842 return Qnil; | |
| 1843 } | |
| 1844 | |
| 1845 /* Parse forward from FROM to END, | |
| 1846 assuming that FROM has state OLDSTATE (nil means FROM is start of function), | |
| 1847 and return a description of the state of the parse at END. | |
| 1848 If STOPBEFORE is nonzero, stop at the start of an atom. | |
| 1849 If COMMENTSTOP is nonzero, stop at the start of a comment. */ | |
| 1850 | |
| 1851 static void | |
| 1852 scan_sexps_forward (struct buffer *buf, struct lisp_parse_state *stateptr, | |
| 665 | 1853 Charbpos from, Charbpos end, |
| 428 | 1854 int targetdepth, int stopbefore, |
| 1855 Lisp_Object oldstate, | |
| 1856 int commentstop) | |
| 1857 { | |
| 1858 struct lisp_parse_state state; | |
| 1859 | |
| 1860 enum syntaxcode code; | |
| 1861 struct level { int last, prev; }; | |
| 1862 struct level levelstart[100]; | |
| 1863 struct level *curlevel = levelstart; | |
| 1864 struct level *endlevel = levelstart + 100; | |
| 1865 int depth; /* Paren depth of current scanning location. | |
| 1866 level - levelstart equals this except | |
| 1867 when the depth becomes negative. */ | |
| 1868 int mindepth; /* Lowest DEPTH value seen. */ | |
| 1869 int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
| 460 | 1870 int boundary_stop = commentstop == -1; |
| 428 | 1871 Lisp_Object tem; |
| 826 | 1872 struct syntax_cache *scache; |
| 1873 | |
| 1874 scache = setup_buffer_syntax_cache (buf, from, 1); | |
| 428 | 1875 if (NILP (oldstate)) |
| 1876 { | |
| 1877 depth = 0; | |
| 1878 state.instring = -1; | |
| 1879 state.incomment = 0; | |
| 1880 state.comstyle = 0; /* comment style a by default */ | |
| 460 | 1881 state.comstr_start = -1; /* no comment/string seen. */ |
| 428 | 1882 } |
| 1883 else | |
| 1884 { | |
| 1885 tem = Fcar (oldstate); /* elt 0, depth */ | |
| 1886 if (!NILP (tem)) | |
| 1887 depth = XINT (tem); | |
| 1888 else | |
| 1889 depth = 0; | |
| 1890 | |
| 1891 oldstate = Fcdr (oldstate); | |
| 1892 oldstate = Fcdr (oldstate); | |
| 1893 oldstate = Fcdr (oldstate); | |
| 1894 tem = Fcar (oldstate); /* elt 3, instring */ | |
| 460 | 1895 state.instring = ( !NILP (tem) |
| 1896 ? ( INTP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
| 1897 : -1); | |
| 428 | 1898 |
| 460 | 1899 oldstate = Fcdr (oldstate); |
| 1900 tem = Fcar (oldstate); /* elt 4, incomment */ | |
| 428 | 1901 state.incomment = !NILP (tem); |
| 1902 | |
| 1903 oldstate = Fcdr (oldstate); | |
| 1904 tem = Fcar (oldstate); /* elt 5, follows-quote */ | |
| 1905 start_quoted = !NILP (tem); | |
| 1906 | |
| 1907 /* if the eighth element of the list is nil, we are in comment style | |
| 3025 | 1908 a; if it is t, we are in comment style b; if it is `syntax-table', |
| 460 | 1909 we are in a generic comment */ |
| 428 | 1910 oldstate = Fcdr (oldstate); |
| 1911 oldstate = Fcdr (oldstate); | |
| 460 | 1912 tem = Fcar (oldstate); /* elt 7, comment style a/b/fence */ |
| 1913 state.comstyle = NILP (tem) ? 0 : ( EQ (tem, Qsyntax_table) | |
| 1914 ? ST_COMMENT_STYLE : 1 ); | |
| 1915 | |
| 1916 oldstate = Fcdr (oldstate); /* elt 8, start of last comment/string */ | |
| 1917 tem = Fcar (oldstate); | |
| 1918 state.comstr_start = NILP (tem) ? -1 : XINT (tem); | |
| 1919 | |
| 1920 /* elt 9, char numbers of starts-of-expression of levels | |
| 1921 (starting from outermost). */ | |
| 1922 oldstate = Fcdr (oldstate); | |
| 1923 tem = Fcar (oldstate); /* elt 9, intermediate data for | |
| 1924 continuation of parsing (subject | |
| 1925 to change). */ | |
| 1926 while (!NILP (tem)) /* >= second enclosing sexps. */ | |
| 1927 { | |
| 1928 curlevel->last = XINT (Fcar (tem)); | |
| 1929 if (++curlevel == endlevel) | |
| 826 | 1930 stack_overflow ("Nesting too deep for parser", |
| 1931 make_int (curlevel - levelstart)); | |
| 460 | 1932 curlevel->prev = -1; |
| 1933 curlevel->last = -1; | |
| 1934 tem = Fcdr (tem); | |
| 1935 } | |
| 428 | 1936 } |
| 1937 state.quoted = 0; | |
| 1938 mindepth = depth; | |
| 1939 | |
| 1940 curlevel->prev = -1; | |
| 1941 curlevel->last = -1; | |
| 1942 | |
| 1943 /* Enter the loop at a place appropriate for initial state. */ | |
| 1944 | |
| 1945 if (state.incomment) goto startincomment; | |
| 1946 if (state.instring >= 0) | |
| 1947 { | |
| 1948 if (start_quoted) goto startquotedinstring; | |
| 1949 goto startinstring; | |
| 1950 } | |
| 1951 if (start_quoted) goto startquoted; | |
| 1952 | |
| 1953 while (from < end) | |
| 1954 { | |
| 867 | 1955 Ichar c; |
| 460 | 1956 int syncode; |
| 1957 | |
| 428 | 1958 QUIT; |
| 1959 | |
| 826 | 1960 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1961 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 1962 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1963 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1964 from++; |
| 1965 | |
| 1966 /* record the comment style we have entered so that only the | |
| 1967 comment-ender sequence (or single char) of the same style | |
| 1968 actually terminates the comment section. */ | |
| 460 | 1969 if (code == Scomment) |
| 1970 { | |
| 1971 state.comstyle = | |
| 1972 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) | |
| 1973 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1974 state.comstr_start = from - 1; | |
| 1975 } | |
| 1976 | |
| 1977 /* a generic comment delimiter? */ | |
| 1978 else if (code == Scomment_fence) | |
| 1979 { | |
| 1980 state.comstyle = ST_COMMENT_STYLE; | |
| 1981 state.comstr_start = from - 1; | |
| 1982 code = Scomment; | |
| 428 | 1983 } |
| 1984 | |
| 1985 else if (from < end && | |
| 460 | 1986 SYNTAX_CODE_START_FIRST_P (syncode)) |
| 428 | 1987 { |
| 460 | 1988 int next_syncode; |
| 826 | 1989 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1990 next_syncode = |
| 826 | 1991 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from)); |
| 460 | 1992 |
| 1993 if (SYNTAX_CODES_START_P (syncode, next_syncode)) | |
| 1994 { | |
| 428 | 1995 code = Scomment; |
| 460 | 1996 state.comstyle = SYNTAX_CODES_COMMENT_MASK_START |
| 1997 (syncode, next_syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1998 state.comstr_start = from - 1; | |
| 428 | 1999 from++; |
| 826 | 2000 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 2001 } |
| 428 | 2002 } |
| 2003 | |
| 460 | 2004 if (SYNTAX_CODE_PREFIX (syncode)) |
| 428 | 2005 continue; |
| 2006 switch (code) | |
| 2007 { | |
| 2008 case Sescape: | |
| 2009 case Scharquote: | |
| 2010 if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
| 2011 curlevel->last = from - 1; | |
| 2012 startquoted: | |
| 2013 if (from == end) goto endquoted; | |
| 2014 from++; | |
| 2015 goto symstarted; | |
| 2016 /* treat following character as a word constituent */ | |
| 2017 case Sword: | |
| 2018 case Ssymbol: | |
| 2019 if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
| 2020 curlevel->last = from - 1; | |
| 2021 symstarted: | |
| 2022 while (from < end) | |
| 2023 { | |
| 826 | 2024 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 2025 switch (SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from))) | |
| 428 | 2026 { |
| 2027 case Scharquote: | |
| 2028 case Sescape: | |
| 2029 from++; | |
| 2030 if (from == end) goto endquoted; | |
| 2031 break; | |
| 2032 case Sword: | |
| 2033 case Ssymbol: | |
| 2034 case Squote: | |
| 2035 break; | |
| 2036 default: | |
| 2037 goto symdone; | |
| 2038 } | |
| 2039 from++; | |
| 2040 } | |
| 2041 symdone: | |
| 2042 curlevel->prev = curlevel->last; | |
| 2043 break; | |
| 2044 | |
| 2045 case Scomment: | |
| 2046 state.incomment = 1; | |
| 460 | 2047 if (commentstop || boundary_stop) goto done; |
| 428 | 2048 startincomment: |
| 460 | 2049 if (commentstop == 1) |
| 428 | 2050 goto done; |
| 826 | 2051 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 2052 { |
| 826 | 2053 Charbpos newfrom = find_end_of_comment (buf, from, end, |
| 2054 state.comstyle); | |
| 428 | 2055 if (newfrom < 0) |
| 2056 { | |
| 2057 /* we terminated search because from == end */ | |
| 2058 from = end; | |
| 2059 goto done; | |
| 2060 } | |
| 2061 from = newfrom; | |
| 2062 } | |
| 2063 state.incomment = 0; | |
| 2064 state.comstyle = 0; /* reset the comment style */ | |
| 460 | 2065 if (boundary_stop) goto done; |
| 428 | 2066 break; |
| 2067 | |
| 2068 case Sopen: | |
| 2069 if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
| 2070 depth++; | |
| 2071 curlevel->last = from - 1; | |
| 2072 if (++curlevel == endlevel) | |
| 826 | 2073 stack_overflow ("Nesting too deep for parser", |
| 2074 make_int (curlevel - levelstart)); | |
| 428 | 2075 curlevel->prev = -1; |
| 2076 curlevel->last = -1; | |
| 2077 if (targetdepth == depth) goto done; | |
| 2078 break; | |
| 2079 | |
| 2080 case Sclose: | |
| 2081 depth--; | |
| 2082 if (depth < mindepth) | |
| 2083 mindepth = depth; | |
| 2084 if (curlevel != levelstart) | |
| 2085 curlevel--; | |
| 2086 curlevel->prev = curlevel->last; | |
| 2087 if (targetdepth == depth) goto done; | |
| 2088 break; | |
| 2089 | |
| 2090 case Sstring: | |
| 460 | 2091 case Sstring_fence: |
| 2092 state.comstr_start = from - 1; | |
| 428 | 2093 if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
| 2094 curlevel->last = from - 1; | |
| 460 | 2095 if (code == Sstring_fence) |
| 428 | 2096 { |
| 460 | 2097 state.instring = ST_STRING_STYLE; |
| 2098 } | |
| 2099 else | |
| 2100 { | |
| 2101 /* XEmacs change: call syntax_match() on character */ | |
| 867 | 2102 Ichar ch = BUF_FETCH_CHAR (buf, from - 1); |
| 460 | 2103 Lisp_Object stermobj = |
| 1296 | 2104 syntax_match (scache->syntax_table, ch); |
| 428 | 2105 |
| 2106 if (CHARP (stermobj)) | |
| 2107 state.instring = XCHAR (stermobj); | |
| 2108 else | |
| 2109 state.instring = ch; | |
| 2110 } | |
| 460 | 2111 if (boundary_stop) goto done; |
| 428 | 2112 startinstring: |
| 2113 while (1) | |
| 2114 { | |
| 460 | 2115 enum syntaxcode temp_code; |
| 2116 | |
| 428 | 2117 if (from >= end) goto done; |
| 460 | 2118 |
| 826 | 2119 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 2120 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 2121 temp_code = SYNTAX_FROM_CACHE (scache, c); |
| 460 | 2122 |
| 2123 if ( | |
| 2124 state.instring != ST_STRING_STYLE && | |
| 2125 temp_code == Sstring && | |
| 2126 c == state.instring) break; | |
| 2127 | |
| 2128 switch (temp_code) | |
| 428 | 2129 { |
| 460 | 2130 case Sstring_fence: |
| 2131 if (state.instring == ST_STRING_STYLE) | |
| 2132 goto string_end; | |
| 2133 break; | |
| 428 | 2134 case Scharquote: |
| 2135 case Sescape: | |
| 2136 { | |
| 2137 from++; | |
| 2138 startquotedinstring: | |
| 2139 if (from >= end) goto endquoted; | |
| 2140 break; | |
| 2141 } | |
| 2142 default: | |
| 2143 break; | |
| 2144 } | |
| 2145 from++; | |
| 2146 } | |
| 460 | 2147 string_end: |
| 428 | 2148 state.instring = -1; |
| 2149 curlevel->prev = curlevel->last; | |
| 2150 from++; | |
| 460 | 2151 if (boundary_stop) goto done; |
| 428 | 2152 break; |
| 2153 | |
| 2154 case Smath: | |
| 2155 break; | |
| 2156 | |
| 2157 case Swhitespace: | |
| 2158 case Spunct: | |
| 2159 case Squote: | |
| 2160 case Sendcomment: | |
| 460 | 2161 case Scomment_fence: |
| 428 | 2162 case Sinherit: |
| 2163 case Smax: | |
| 2164 break; | |
| 2165 } | |
| 2166 } | |
| 2167 goto done; | |
| 2168 | |
| 2169 stop: /* Here if stopping before start of sexp. */ | |
| 2170 from--; /* We have just fetched the char that starts it; */ | |
| 2171 goto done; /* but return the position before it. */ | |
| 2172 | |
| 2173 endquoted: | |
| 2174 state.quoted = 1; | |
| 2175 done: | |
| 2176 state.depth = depth; | |
| 2177 state.mindepth = mindepth; | |
| 2178 state.thislevelstart = curlevel->prev; | |
| 2179 state.prevlevelstart | |
| 2180 = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
| 2181 state.location = from; | |
| 460 | 2182 state.levelstarts = Qnil; |
| 2183 while (--curlevel >= levelstart) | |
| 2184 state.levelstarts = Fcons (make_int (curlevel->last), | |
| 2185 state.levelstarts); | |
| 428 | 2186 |
| 2187 *stateptr = state; | |
| 2188 } | |
| 2189 | |
| 2190 DEFUN ("parse-partial-sexp", Fparse_partial_sexp, 2, 7, 0, /* | |
| 2191 Parse Lisp syntax starting at FROM until TO; return status of parse at TO. | |
| 2192 Parsing stops at TO or when certain criteria are met; | |
| 2193 point is set to where parsing stops. | |
| 444 | 2194 If fifth arg OLDSTATE is omitted or nil, |
| 428 | 2195 parsing assumes that FROM is the beginning of a function. |
| 460 | 2196 Value is a list of nine elements describing final state of parsing: |
| 428 | 2197 0. depth in parens. |
| 2198 1. character address of start of innermost containing list; nil if none. | |
| 2199 2. character address of start of last complete sexp terminated. | |
| 2200 3. non-nil if inside a string. | |
| 460 | 2201 (It is the character that will terminate the string, |
| 2202 or t if the string should be terminated by an explicit | |
| 2203 `syntax-table' property.) | |
| 428 | 2204 4. t if inside a comment. |
| 2205 5. t if following a quote character. | |
| 2206 6. the minimum paren-depth encountered during this scan. | |
| 460 | 2207 7. nil if in comment style a, or not in a comment; t if in comment style b; |
| 2208 `syntax-table' if given by an explicit `syntax-table' property. | |
| 2209 8. character address of start of last comment or string; nil if none. | |
| 2210 9. Intermediate data for continuation of parsing (subject to change). | |
| 428 | 2211 If third arg TARGETDEPTH is non-nil, parsing stops if the depth |
| 2212 in parentheses becomes equal to TARGETDEPTH. | |
| 2213 Fourth arg STOPBEFORE non-nil means stop when come to | |
| 2214 any character that starts a sexp. | |
| 460 | 2215 Fifth arg OLDSTATE is a nine-element list like what this function returns. |
| 428 | 2216 It is used to initialize the state of the parse. Its second and third |
| 2217 elements are ignored. | |
| 460 | 2218 Sixth arg COMMENTSTOP non-nil means stop at the start of a comment. If it |
| 2219 is `syntax-table', stop after the start of a comment or a string, or after | |
| 2220 the end of a comment or string. | |
| 826 | 2221 Seventh arg BUFFER specifies the buffer to do the parsing in, and defaults |
| 2222 to the current buffer. | |
| 428 | 2223 */ |
| 2224 (from, to, targetdepth, stopbefore, oldstate, commentstop, buffer)) | |
| 2225 { | |
| 2226 struct lisp_parse_state state; | |
| 2227 int target; | |
| 665 | 2228 Charbpos start, end; |
| 428 | 2229 struct buffer *buf = decode_buffer (buffer, 0); |
| 2230 Lisp_Object val; | |
| 2231 | |
| 2232 if (!NILP (targetdepth)) | |
| 2233 { | |
| 2234 CHECK_INT (targetdepth); | |
| 2235 target = XINT (targetdepth); | |
| 2236 } | |
| 2237 else | |
| 2238 target = -100000; /* We won't reach this depth */ | |
| 2239 | |
| 2240 get_buffer_range_char (buf, from, to, &start, &end, 0); | |
| 2241 scan_sexps_forward (buf, &state, start, end, | |
| 2242 target, !NILP (stopbefore), oldstate, | |
| 460 | 2243 (NILP (commentstop) |
| 2244 ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); | |
| 428 | 2245 BUF_SET_PT (buf, state.location); |
| 2246 | |
| 2247 /* reverse order */ | |
| 2248 val = Qnil; | |
| 460 | 2249 val = Fcons (state.levelstarts, val); |
| 2250 val = Fcons ((state.incomment || (state.instring >= 0)) | |
| 2251 ? make_int (state.comstr_start) : Qnil, val); | |
| 2252 val = Fcons (state.comstyle ? (state.comstyle == ST_COMMENT_STYLE | |
| 2253 ? Qsyntax_table : Qt) : Qnil, val); | |
| 428 | 2254 val = Fcons (make_int (state.mindepth), val); |
| 2255 val = Fcons (state.quoted ? Qt : Qnil, val); | |
| 2256 val = Fcons (state.incomment ? Qt : Qnil, val); | |
| 460 | 2257 val = Fcons (state.instring < 0 |
| 2258 ? Qnil | |
| 2259 : (state.instring == ST_STRING_STYLE | |
| 2260 ? Qt : make_int (state.instring)), val); | |
| 826 | 2261 val = Fcons (state.thislevelstart < 0 ? Qnil : |
| 2262 make_int (state.thislevelstart), val); | |
| 2263 val = Fcons (state.prevlevelstart < 0 ? Qnil : | |
| 2264 make_int (state.prevlevelstart), val); | |
| 428 | 2265 val = Fcons (make_int (state.depth), val); |
| 2266 | |
| 2267 return val; | |
| 2268 } | |
| 2269 | |
| 2270 | |
| 2271 /* Updating of the mirror syntax table. | |
| 2272 | |
| 1296 | 2273 Each syntax table has a corresponding mirror table in it. Whenever we |
| 2274 make a change to a syntax table, we set a dirty flag. When accessing a | |
| 2275 value from the mirror table and the table is dirty, we call | |
| 2276 update_syntax_table() to clean it up. | |
| 428 | 2277 |
| 2278 #### We really only need to map over the changed range. | |
| 2279 | |
| 2280 If we change the standard syntax table, we need to map over | |
| 2281 all tables because any of them could be inheriting from the | |
| 2282 standard syntax table. | |
| 2283 | |
| 2284 When `set-syntax-table' is called, we set the buffer's mirror | |
| 2285 syntax table as well. | |
| 2286 */ | |
| 2287 | |
| 826 | 2288 static int |
| 2286 | 2289 copy_to_mirrortab (struct chartab_range *range, Lisp_Object UNUSED (table), |
| 826 | 2290 Lisp_Object val, void *arg) |
| 428 | 2291 { |
| 5013 | 2292 Lisp_Object mirrortab = GET_LISP_FROM_VOID (arg); |
| 428 | 2293 |
| 2294 if (CONSP (val)) | |
| 2295 val = XCAR (val); | |
| 826 | 2296 if (SYNTAX_FROM_CODE (XINT (val)) != Sinherit) |
| 2297 put_char_table (mirrortab, range, val); | |
| 2298 return 0; | |
| 2299 } | |
| 2300 | |
| 2301 static int | |
| 2286 | 2302 copy_if_not_already_present (struct chartab_range *range, |
| 2303 Lisp_Object UNUSED (table), | |
| 826 | 2304 Lisp_Object val, void *arg) |
| 2305 { | |
| 5013 | 2306 Lisp_Object mirrortab = GET_LISP_FROM_VOID (arg); |
| 826 | 2307 if (CONSP (val)) |
| 2308 val = XCAR (val); | |
| 2309 if (SYNTAX_FROM_CODE (XINT (val)) != Sinherit) | |
| 2310 { | |
| 2311 Lisp_Object existing = | |
| 1296 | 2312 updating_mirror_get_range_char_table (range, mirrortab, |
| 2313 Vbogus_syntax_table_value); | |
| 826 | 2314 if (NILP (existing)) |
| 2315 /* nothing at all */ | |
| 1296 | 2316 put_char_table (mirrortab, range, val); |
| 2317 else if (!EQ (existing, Vbogus_syntax_table_value)) | |
| 826 | 2318 /* full */ |
| 2319 ; | |
| 2320 else | |
| 2321 { | |
| 2322 Freset_char_table (Vtemp_table_for_use_updating_syntax_tables); | |
| 2323 copy_char_table_range | |
| 1296 | 2324 (mirrortab, Vtemp_table_for_use_updating_syntax_tables, range); |
| 2325 put_char_table (mirrortab, range, val); | |
| 826 | 2326 copy_char_table_range |
| 1296 | 2327 (Vtemp_table_for_use_updating_syntax_tables, mirrortab, range); |
| 826 | 2328 } |
| 428 | 2329 } |
| 826 | 2330 |
| 428 | 2331 return 0; |
| 2332 } | |
| 2333 | |
| 2334 static void | |
| 826 | 2335 update_just_this_syntax_table (Lisp_Object table) |
| 428 | 2336 { |
| 2337 struct chartab_range range; | |
| 826 | 2338 Lisp_Object mirrortab = XCHAR_TABLE (table)->mirror_table; |
| 2339 | |
| 1296 | 2340 assert (!XCHAR_TABLE (table)->mirror_table_p); |
| 826 | 2341 range.type = CHARTAB_RANGE_ALL; |
| 2342 Freset_char_table (mirrortab); | |
| 1296 | 2343 |
| 826 | 2344 /* First, copy the tables values other than inherit into the mirror |
| 2345 table. Then, for tables other than the standard syntax table, map | |
| 2346 over the standard table, copying values into the mirror table only if | |
| 2347 entries don't already exist in that table. (The copying step requires | |
| 2348 another mapping.) | |
| 2349 */ | |
| 428 | 2350 |
| 5013 | 2351 map_char_table (table, &range, copy_to_mirrortab, STORE_LISP_IN_VOID (mirrortab)); |
| 826 | 2352 /* second clause catches bootstrapping problems when initializing the |
| 2353 standard syntax table */ | |
| 2354 if (!EQ (table, Vstandard_syntax_table) && !NILP (Vstandard_syntax_table)) | |
| 1296 | 2355 map_char_table (Vstandard_syntax_table, &range, |
| 5013 | 2356 copy_if_not_already_present, STORE_LISP_IN_VOID (mirrortab)); |
| 3152 | 2357 /* The resetting made the default be Qnil. Put it back to Sword. */ |
| 2358 set_char_table_default (mirrortab, make_int (Sword)); | |
| 1296 | 2359 XCHAR_TABLE (mirrortab)->dirty = 0; |
| 428 | 2360 } |
| 2361 | |
| 2362 /* Called from chartab.c when a change is made to a syntax table. | |
| 2363 If this is the standard syntax table, we need to recompute | |
| 2364 *all* syntax tables (yuck). Otherwise we just recompute this | |
| 2365 one. */ | |
| 2366 | |
| 2367 void | |
| 826 | 2368 update_syntax_table (Lisp_Object table) |
| 428 | 2369 { |
| 1296 | 2370 Lisp_Object nonmirror = XCHAR_TABLE (table)->mirror_table; |
| 2371 assert (XCHAR_TABLE (table)->mirror_table_p); | |
| 2372 if (EQ (nonmirror, Vstandard_syntax_table)) | |
| 428 | 2373 { |
| 2374 Lisp_Object syntab; | |
| 2375 | |
| 2376 for (syntab = Vall_syntax_tables; !NILP (syntab); | |
| 2377 syntab = XCHAR_TABLE (syntab)->next_table) | |
| 826 | 2378 update_just_this_syntax_table (syntab); |
| 428 | 2379 } |
| 2380 else | |
| 1296 | 2381 update_just_this_syntax_table (nonmirror); |
| 428 | 2382 } |
| 2383 | |
| 2384 | |
| 2385 /************************************************************************/ | |
| 2386 /* initialization */ | |
| 2387 /************************************************************************/ | |
| 2388 | |
| 2389 void | |
| 2390 syms_of_syntax (void) | |
| 2391 { | |
| 3092 | 2392 #ifdef NEW_GC |
|
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diff
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|
2393 INIT_LISP_OBJECT (syntax_cache); |
| 3092 | 2394 #endif /* NEW_GC */ |
| 563 | 2395 DEFSYMBOL (Qsyntax_table_p); |
| 2396 DEFSYMBOL (Qsyntax_table); | |
| 428 | 2397 |
| 2398 DEFSUBR (Fsyntax_table_p); | |
| 2399 DEFSUBR (Fsyntax_table); | |
| 826 | 2400 #ifdef DEBUG_XEMACS |
| 2401 DEFSUBR (Fmirror_syntax_table); | |
| 2402 DEFSUBR (Fsyntax_cache_info); | |
| 2403 #endif /* DEBUG_XEMACS */ | |
| 428 | 2404 DEFSUBR (Fstandard_syntax_table); |
| 2405 DEFSUBR (Fcopy_syntax_table); | |
| 2406 DEFSUBR (Fset_syntax_table); | |
| 2407 DEFSUBR (Fsyntax_designator_chars); | |
| 2408 DEFSUBR (Fchar_syntax); | |
| 2409 DEFSUBR (Fmatching_paren); | |
| 2410 /* DEFSUBR (Fmodify_syntax_entry); now in Lisp. */ | |
| 2411 /* DEFSUBR (Fdescribe_syntax); now in Lisp. */ | |
| 2412 | |
| 2413 DEFSUBR (Fforward_word); | |
| 2414 | |
| 2415 DEFSUBR (Fforward_comment); | |
| 2416 DEFSUBR (Fscan_lists); | |
| 2417 DEFSUBR (Fscan_sexps); | |
| 2418 DEFSUBR (Fbackward_prefix_chars); | |
| 2419 DEFSUBR (Fparse_partial_sexp); | |
|
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diff
changeset
|
2420 |
|
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use more specific `scan-error' in scan-lists to be GNU compatible
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parents:
4759
diff
changeset
|
2421 DEFERROR_STANDARD (Qscan_error, Qsyntax_error); |
| 428 | 2422 } |
| 2423 | |
| 2424 void | |
| 2425 vars_of_syntax (void) | |
| 2426 { | |
| 2427 DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments /* | |
| 2428 Non-nil means `forward-sexp', etc., should treat comments as whitespace. | |
| 2429 */ ); | |
| 434 | 2430 parse_sexp_ignore_comments = 0; |
| 428 | 2431 |
| 460 | 2432 DEFVAR_BOOL ("lookup-syntax-properties", &lookup_syntax_properties /* |
| 826 | 2433 Non-nil means `forward-sexp', etc., respect the `syntax-table' property. |
| 2434 This property can be placed on buffers or strings and can be used to explicitly | |
| 2435 specify the syntax table to be used for looking up the syntax of the chars | |
| 2436 having this property, or to directly specify the syntax of the chars. | |
| 2437 | |
| 460 | 2438 The value of this property should be either a syntax table, or a cons |
| 2439 of the form (SYNTAXCODE . MATCHCHAR), SYNTAXCODE being the numeric | |
| 2440 syntax code, MATCHCHAR being nil or the character to match (which is | |
| 826 | 2441 relevant only when the syntax code is open/close-type). |
| 460 | 2442 */ ); |
| 2443 lookup_syntax_properties = 1; | |
| 2444 | |
| 428 | 2445 DEFVAR_BOOL ("words-include-escapes", &words_include_escapes /* |
| 2446 Non-nil means `forward-word', etc., should treat escape chars part of words. | |
| 2447 */ ); | |
| 434 | 2448 words_include_escapes = 0; |
| 428 | 2449 |
| 2450 no_quit_in_re_search = 0; | |
| 1296 | 2451 |
| 2452 Vbogus_syntax_table_value = make_float (0.0); | |
| 2453 staticpro (&Vbogus_syntax_table_value); | |
| 428 | 2454 } |
| 2455 | |
| 2456 static void | |
| 3540 | 2457 define_standard_syntax (const UExtbyte *p, enum syntaxcode syn) |
| 428 | 2458 { |
| 2459 for (; *p; p++) | |
| 2460 Fput_char_table (make_char (*p), make_int (syn), Vstandard_syntax_table); | |
| 2461 } | |
| 2462 | |
| 2463 void | |
| 2464 complex_vars_of_syntax (void) | |
| 2465 { | |
| 867 | 2466 Ichar i; |
| 3540 | 2467 const UExtbyte *p; /* Latin-1, not internal format. */ |
| 2468 | |
| 2469 #define SET_RANGE_SYNTAX(start, end, syntax) \ | |
| 2470 do { \ | |
| 2471 for (i = start; i <= end; i++) \ | |
| 2472 Fput_char_table(make_char(i), make_int(syntax), \ | |
| 2473 Vstandard_syntax_table); \ | |
| 2474 } while (0) | |
| 2475 | |
| 2476 /* Set this now, so first buffer creation can refer to it. | |
| 2477 | |
| 2478 Make it nil before calling copy-syntax-table so that copy-syntax-table | |
| 2479 will know not to try to copy from garbage */ | |
| 428 | 2480 Vstandard_syntax_table = Qnil; |
| 2481 Vstandard_syntax_table = Fcopy_syntax_table (Qnil); | |
| 2482 staticpro (&Vstandard_syntax_table); | |
| 2483 | |
| 826 | 2484 Vtemp_table_for_use_updating_syntax_tables = Fmake_char_table (Qgeneric); |
| 2485 staticpro (&Vtemp_table_for_use_updating_syntax_tables); | |
| 2486 | |
| 428 | 2487 Vsyntax_designator_chars_string = make_string_nocopy (syntax_code_spec, |
| 2488 Smax); | |
| 2489 staticpro (&Vsyntax_designator_chars_string); | |
| 2490 | |
| 3540 | 2491 /* Default character syntax is word. */ |
| 3152 | 2492 set_char_table_default (Vstandard_syntax_table, make_int (Sword)); |
| 428 | 2493 |
| 3540 | 2494 /* Control 0; treat as punctuation */ |
| 2495 SET_RANGE_SYNTAX(0, 32, Spunct); | |
| 428 | 2496 |
| 3544 | 2497 /* The whitespace--overwriting some of the above changes. |
| 2498 | |
| 2499 String literals are const char *s, not const unsigned char *s. */ | |
|
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|
2500 define_standard_syntax((const UExtbyte *)" \t\015\014\012", Swhitespace); |
| 3540 | 2501 |
| 2502 /* DEL plus Control 1 */ | |
| 2503 SET_RANGE_SYNTAX(127, 159, Spunct); | |
| 2504 | |
| 3544 | 2505 define_standard_syntax ((const UExtbyte *)"\"", Sstring); |
| 2506 define_standard_syntax ((const UExtbyte *)"\\", Sescape); | |
| 2507 define_standard_syntax ((const UExtbyte *)"_-+*/&|<>=", Ssymbol); | |
| 2508 define_standard_syntax ((const UExtbyte *)".,;:?!#@~^'`", Spunct); | |
| 428 | 2509 |
| 3544 | 2510 for (p = (const UExtbyte *)"()[]{}"; *p; p+=2) |
| 428 | 2511 { |
| 2512 Fput_char_table (make_char (p[0]), | |
| 2513 Fcons (make_int (Sopen), make_char (p[1])), | |
| 2514 Vstandard_syntax_table); | |
| 2515 Fput_char_table (make_char (p[1]), | |
| 2516 Fcons (make_int (Sclose), make_char (p[0])), | |
| 2517 Vstandard_syntax_table); | |
| 2518 } | |
| 3540 | 2519 |
| 2520 /* Latin 1 "symbols." This contrasts with the FSF, where they're word | |
| 2521 constituents. */ | |
| 2522 SET_RANGE_SYNTAX(0240, 0277, Ssymbol); | |
| 2523 | |
| 2524 /* The guillemets. These are not parentheses, in contrast to what the old | |
| 2525 code did. */ | |
| 3569 | 2526 define_standard_syntax((const UExtbyte *)"\253\273", Spunct); |
| 3540 | 2527 |
| 2528 /* The inverted exclamation mark, and the multiplication and division | |
| 2529 signs. */ | |
| 3544 | 2530 define_standard_syntax((const UExtbyte *)"\241\327\367", Spunct); |
| 3540 | 2531 |
| 2532 #undef SET_RANGE_SYNTAX | |
| 428 | 2533 } |