Mercurial > hg > xemacs-beta
annotate src/syntax.c @ 5119:d877c14318b3 ben-lisp-object
merge in latest-fix changes
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sat, 26 Dec 2009 21:22:48 -0600 |
| parents | e0db3c197671 |
| children | d1247f3cc363 |
| 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 |
|
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34 #ifdef NEW_GC |
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35 # define UNUSED_IF_NEW_GC(decl) UNUSED (decl) |
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Jerry James <james@xemacs.org>
parents:
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diff
changeset
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36 #else |
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3a87551bfeb5
Fixes for a number of minor warnings issued by gcc. See xemacs-patches message
Jerry James <james@xemacs.org>
parents:
4653
diff
changeset
|
37 # define UNUSED_IF_NEW_GC(decl) decl |
|
3a87551bfeb5
Fixes for a number of minor warnings issued by gcc. See xemacs-patches message
Jerry James <james@xemacs.org>
parents:
4653
diff
changeset
|
38 #endif |
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3a87551bfeb5
Fixes for a number of minor warnings issued by gcc. See xemacs-patches message
Jerry James <james@xemacs.org>
parents:
4653
diff
changeset
|
39 |
| 460 | 40 #define ST_COMMENT_STYLE 0x101 |
| 41 #define ST_STRING_STYLE 0x102 | |
| 42 | |
| 43 Lisp_Object Qsyntax_table; | |
| 44 int lookup_syntax_properties; | |
| 45 | |
| 428 | 46 Lisp_Object Qsyntax_table_p; |
| 47 | |
| 48 int words_include_escapes; | |
| 49 | |
| 50 int parse_sexp_ignore_comments; | |
| 51 | |
| 52 /* The following two variables are provided to tell additional information | |
| 53 to the regex routines. We do it this way rather than change the | |
| 54 arguments to re_search_2() in an attempt to maintain some call | |
| 55 compatibility with other versions of the regex code. */ | |
| 56 | |
| 57 /* Tell the regex routines not to QUIT. Normally there is a QUIT | |
| 58 each iteration in re_search_2(). */ | |
| 59 int no_quit_in_re_search; | |
| 60 | |
| 826 | 61 /* The standard syntax table is stored where it will automatically |
| 62 be used in all new buffers. */ | |
| 428 | 63 Lisp_Object Vstandard_syntax_table; |
| 64 | |
| 65 Lisp_Object Vsyntax_designator_chars_string; | |
| 66 | |
| 826 | 67 Lisp_Object Vtemp_table_for_use_updating_syntax_tables; |
| 68 | |
| 1296 | 69 /* A value that is guaranteed not be in a syntax table. */ |
| 70 Lisp_Object Vbogus_syntax_table_value; | |
| 71 | |
| 826 | 72 static void syntax_cache_table_was_changed (struct buffer *buf); |
| 73 | |
| 428 | 74 /* This is the internal form of the parse state used in parse-partial-sexp. */ |
| 75 | |
| 76 struct lisp_parse_state | |
| 77 { | |
| 78 int depth; /* Depth at end of parsing */ | |
| 867 | 79 Ichar instring; /* -1 if not within string, else desired terminator */ |
| 428 | 80 int incomment; /* Nonzero if within a comment at end of parsing */ |
| 460 | 81 int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE */ |
| 428 | 82 int quoted; /* Nonzero if just after an escape char at end of |
| 83 parsing */ | |
| 665 | 84 Charbpos thislevelstart;/* Char number of most recent start-of-expression |
| 428 | 85 at current level */ |
| 665 | 86 Charbpos prevlevelstart;/* Char number of start of containing expression */ |
| 87 Charbpos location; /* Char number at which parsing stopped */ | |
| 428 | 88 int mindepth; /* Minimum depth seen while scanning */ |
| 826 | 89 Charbpos comstr_start;/* Position just after last comment/string starter */ |
| 90 Lisp_Object levelstarts;/* Char numbers of starts-of-expression | |
| 91 of levels (starting from outermost). */ | |
| 428 | 92 }; |
| 93 | |
| 94 /* These variables are a cache for finding the start of a defun. | |
| 95 find_start_pos is the place for which the defun start was found. | |
| 96 find_start_value is the defun start position found for it. | |
| 97 find_start_buffer is the buffer it was found in. | |
| 98 find_start_begv is the BEGV value when it was found. | |
| 99 find_start_modiff is the value of MODIFF when it was found. */ | |
| 100 | |
| 665 | 101 static Charbpos find_start_pos; |
| 102 static Charbpos find_start_value; | |
| 428 | 103 static struct buffer *find_start_buffer; |
| 665 | 104 static Charbpos find_start_begv; |
| 428 | 105 static int find_start_modiff; |
| 106 | |
| 107 /* Find a defun-start that is the last one before POS (or nearly the last). | |
| 108 We record what we find, so that another call in the same area | |
| 109 can return the same value right away. */ | |
| 110 | |
| 665 | 111 static Charbpos |
| 112 find_defun_start (struct buffer *buf, Charbpos pos) | |
| 428 | 113 { |
| 665 | 114 Charbpos tem; |
| 826 | 115 struct syntax_cache *scache; |
| 116 | |
| 428 | 117 /* Use previous finding, if it's valid and applies to this inquiry. */ |
| 118 if (buf == find_start_buffer | |
| 119 /* Reuse the defun-start even if POS is a little farther on. | |
| 120 POS might be in the next defun, but that's ok. | |
| 121 Our value may not be the best possible, but will still be usable. */ | |
| 122 && pos <= find_start_pos + 1000 | |
| 123 && pos >= find_start_value | |
| 124 && BUF_BEGV (buf) == find_start_begv | |
| 125 && BUF_MODIFF (buf) == find_start_modiff) | |
| 126 return find_start_value; | |
| 127 | |
| 128 /* Back up to start of line. */ | |
| 129 tem = find_next_newline (buf, pos, -1); | |
| 130 | |
| 826 | 131 scache = setup_buffer_syntax_cache (buf, tem, 1); |
| 428 | 132 while (tem > BUF_BEGV (buf)) |
| 133 { | |
| 826 | 134 UPDATE_SYNTAX_CACHE_BACKWARD (scache, tem); |
| 460 | 135 |
| 428 | 136 /* Open-paren at start of line means we found our defun-start. */ |
| 826 | 137 if (SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, tem)) == Sopen) |
| 428 | 138 break; |
| 139 /* Move to beg of previous line. */ | |
| 140 tem = find_next_newline (buf, tem, -2); | |
| 141 } | |
| 142 | |
| 143 /* Record what we found, for the next try. */ | |
| 144 find_start_value = tem; | |
| 145 find_start_buffer = buf; | |
| 146 find_start_modiff = BUF_MODIFF (buf); | |
| 147 find_start_begv = BUF_BEGV (buf); | |
| 148 find_start_pos = pos; | |
| 149 | |
| 150 return find_start_value; | |
| 151 } | |
| 152 | |
| 153 DEFUN ("syntax-table-p", Fsyntax_table_p, 1, 1, 0, /* | |
| 444 | 154 Return t if OBJECT is a syntax table. |
| 428 | 155 */ |
| 444 | 156 (object)) |
| 428 | 157 { |
| 444 | 158 return (CHAR_TABLEP (object) |
| 159 && XCHAR_TABLE_TYPE (object) == CHAR_TABLE_TYPE_SYNTAX) | |
| 428 | 160 ? Qt : Qnil; |
| 161 } | |
| 162 | |
| 163 static Lisp_Object | |
| 164 check_syntax_table (Lisp_Object obj, Lisp_Object default_) | |
| 165 { | |
| 166 if (NILP (obj)) | |
| 167 obj = default_; | |
| 168 while (NILP (Fsyntax_table_p (obj))) | |
| 169 obj = wrong_type_argument (Qsyntax_table_p, obj); | |
| 170 return obj; | |
| 171 } | |
| 172 | |
| 173 DEFUN ("syntax-table", Fsyntax_table, 0, 1, 0, /* | |
| 174 Return the current syntax table. | |
| 175 This is the one specified by the current buffer, or by BUFFER if it | |
| 176 is non-nil. | |
| 177 */ | |
| 178 (buffer)) | |
| 179 { | |
| 180 return decode_buffer (buffer, 0)->syntax_table; | |
| 181 } | |
| 182 | |
| 826 | 183 #ifdef DEBUG_XEMACS |
| 184 | |
| 185 DEFUN ("mirror-syntax-table", Fmirror_syntax_table, 0, 1, 0, /* | |
| 186 Return the current mirror syntax table, for debugging purposes. | |
| 187 This is the one specified by the current buffer, or by BUFFER if it | |
| 188 is non-nil. | |
| 189 */ | |
| 190 (buffer)) | |
| 191 { | |
| 192 return decode_buffer (buffer, 0)->mirror_syntax_table; | |
| 193 } | |
| 194 | |
| 195 DEFUN ("syntax-cache-info", Fsyntax_cache_info, 0, 1, 0, /* | |
| 196 Return info about the syntax cache in BUFFER. | |
| 197 BUFFER defaults to the current buffer if nil. | |
| 198 */ | |
| 199 (buffer)) | |
| 200 { | |
| 201 struct buffer *buf = decode_buffer (buffer, 0); | |
| 202 struct syntax_cache *cache = buf->syntax_cache; | |
| 203 return list4 (cache->start, cache->end, make_int (cache->prev_change), | |
| 204 make_int (cache->next_change)); | |
| 205 } | |
| 206 | |
| 207 #endif /* DEBUG_XEMACS */ | |
| 208 | |
| 428 | 209 DEFUN ("standard-syntax-table", Fstandard_syntax_table, 0, 0, 0, /* |
| 210 Return the standard syntax table. | |
| 211 This is the one used for new buffers. | |
| 212 */ | |
| 213 ()) | |
| 214 { | |
| 215 return Vstandard_syntax_table; | |
| 216 } | |
| 217 | |
| 218 DEFUN ("copy-syntax-table", Fcopy_syntax_table, 0, 1, 0, /* | |
| 444 | 219 Return a new syntax table which is a copy of SYNTAX-TABLE. |
| 220 SYNTAX-TABLE defaults to the standard syntax table. | |
| 428 | 221 */ |
| 444 | 222 (syntax_table)) |
| 428 | 223 { |
| 224 if (NILP (Vstandard_syntax_table)) | |
| 225 return Fmake_char_table (Qsyntax); | |
| 226 | |
| 444 | 227 syntax_table = check_syntax_table (syntax_table, Vstandard_syntax_table); |
| 228 return Fcopy_char_table (syntax_table); | |
| 428 | 229 } |
| 230 | |
| 231 DEFUN ("set-syntax-table", Fset_syntax_table, 1, 2, 0, /* | |
| 444 | 232 Select SYNTAX-TABLE as the new syntax table for BUFFER. |
| 428 | 233 BUFFER defaults to the current buffer if omitted. |
| 234 */ | |
| 444 | 235 (syntax_table, buffer)) |
| 428 | 236 { |
| 237 struct buffer *buf = decode_buffer (buffer, 0); | |
| 444 | 238 syntax_table = check_syntax_table (syntax_table, Qnil); |
| 239 buf->syntax_table = syntax_table; | |
| 240 buf->mirror_syntax_table = XCHAR_TABLE (syntax_table)->mirror_table; | |
| 826 | 241 syntax_cache_table_was_changed (buf); |
| 428 | 242 /* Indicate that this buffer now has a specified syntax table. */ |
| 243 buf->local_var_flags |= XINT (buffer_local_flags.syntax_table); | |
| 444 | 244 return syntax_table; |
| 428 | 245 } |
| 3252 | 246 |
| 247 | |
| 428 | 248 |
| 3252 | 249 /* |
| 250 * Syntax caching | |
| 251 */ | |
| 252 | |
| 253 /* syntax_cache object implementation */ | |
| 254 | |
| 255 static const struct memory_description syntax_cache_description_1 [] = { | |
| 256 { XD_LISP_OBJECT, offsetof (struct syntax_cache, object) }, | |
| 257 { XD_LISP_OBJECT, offsetof (struct syntax_cache, buffer) }, | |
| 258 { XD_LISP_OBJECT, offsetof (struct syntax_cache, syntax_table) }, | |
| 259 { XD_LISP_OBJECT, offsetof (struct syntax_cache, mirror_table) }, | |
| 260 { XD_LISP_OBJECT, offsetof (struct syntax_cache, start) }, | |
| 261 { XD_LISP_OBJECT, offsetof (struct syntax_cache, end) }, | |
| 262 { XD_END } | |
| 263 }; | |
| 264 | |
| 265 #ifdef NEW_GC | |
|
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Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
266 DEFINE_DUMPABLE_INTERNAL_LISP_OBJECT ("syntax-cache", syntax_cache, |
|
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
267 0, syntax_cache_description_1, |
|
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
268 Lisp_Syntax_Cache); |
| 3252 | 269 #else /* not NEW_GC */ |
| 270 | |
| 271 const struct sized_memory_description syntax_cache_description = { | |
| 272 sizeof (struct syntax_cache), | |
| 273 syntax_cache_description_1 | |
| 274 }; | |
| 275 #endif /* not NEW_GC */ | |
| 276 | |
| 277 /* static syntax cache utilities */ | |
| 278 | |
| 279 static void | |
| 280 syntax_cache_table_was_changed (struct buffer *buf) | |
| 281 { | |
| 282 struct syntax_cache *cache = buf->syntax_cache; | |
| 283 if (cache->no_syntax_table_prop) | |
| 284 { | |
| 285 cache->syntax_table = | |
| 286 BUFFER_SYNTAX_TABLE (buf); | |
| 287 cache->mirror_table = | |
| 288 BUFFER_MIRROR_SYNTAX_TABLE (buf); | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 static void | |
| 293 reset_buffer_syntax_cache_range (struct syntax_cache *cache, | |
| 294 Lisp_Object buffer, int infinite) | |
| 295 { | |
| 296 Fset_marker (cache->start, make_int (1), buffer); | |
| 297 Fset_marker (cache->end, make_int (1), buffer); | |
| 298 Fset_marker_insertion_type (cache->start, Qt); | |
| 299 Fset_marker_insertion_type (cache->end, Qnil); | |
| 300 /* #### Should we "cache->no_syntax_table_prop = 1;" here? */ | |
| 301 /* #### Cf comment on INFINITE in init_syntax_cache. -- sjt */ | |
| 302 if (infinite) | |
| 303 { | |
| 304 cache->prev_change = EMACS_INT_MIN; | |
| 305 cache->next_change = EMACS_INT_MAX; | |
| 306 } | |
| 307 else | |
| 308 { | |
| 309 cache->prev_change = -1; | |
| 310 cache->next_change = -1; | |
| 311 } | |
| 312 } | |
| 826 | 313 |
| 314 static void | |
| 315 init_syntax_cache (struct syntax_cache *cache, Lisp_Object object, | |
| 316 struct buffer *buffer, int infinite) | |
| 317 { | |
| 318 xzero (*cache); | |
| 319 cache->object = object; | |
| 320 cache->buffer = buffer; | |
| 321 cache->no_syntax_table_prop = 1; | |
| 1296 | 322 cache->syntax_table = |
| 323 BUFFER_SYNTAX_TABLE (cache->buffer); | |
| 324 cache->mirror_table = | |
| 826 | 325 BUFFER_MIRROR_SYNTAX_TABLE (cache->buffer); |
| 326 cache->start = Qnil; | |
| 327 cache->end = Qnil; | |
| 3250 | 328 /* #### I'm not sure what INFINITE is for, but it's apparently needed by |
| 329 setup_syntax_cache(). It looks like it's supposed to guarantee that | |
| 330 the test for POS outside of cache-valid range will never succeed, so | |
| 331 that update_syntax_cache won't get called, but it's hard to be sure. | |
| 332 Cf reset_buffer_syntax_cache_range. -- sjt */ | |
| 826 | 333 if (infinite) |
| 334 { | |
| 335 cache->prev_change = EMACS_INT_MIN; | |
| 336 cache->next_change = EMACS_INT_MAX; | |
| 337 } | |
| 338 else | |
| 339 { | |
| 340 cache->prev_change = -1; | |
| 341 cache->next_change = -1; | |
| 342 } | |
| 343 } | |
| 344 | |
| 3252 | 345 /* external syntax cache API */ |
| 346 | |
| 3250 | 347 /* #### This function and associated logic still needs work, and especially |
| 348 documentation. */ | |
| 349 struct syntax_cache * /* return CACHE or the cache of OBJECT */ | |
| 350 setup_syntax_cache (struct syntax_cache *cache, /* syntax cache, may be NULL | |
| 351 if OBJECT is a buffer */ | |
| 352 Lisp_Object object, /* the object (if any) cache | |
| 353 is associated with */ | |
| 354 struct buffer *buffer, /* the buffer to use as source | |
| 355 of the syntax table */ | |
| 356 Charxpos from, /* initial position of cache */ | |
| 357 int count) /* direction? see code */ | |
| 826 | 358 { |
| 3250 | 359 /* If OBJECT is a buffer, use its cache. Initialize cache. Make it valid |
| 360 for the whole buffer if the syntax-table property is not being respected. | |
| 361 Else if OBJECT is not a buffer, initialize the cache passed in CACHE. | |
| 362 If the syntax-table property is being respected, update the cache. */ | |
| 826 | 363 if (BUFFERP (object)) |
| 3250 | 364 { |
| 365 cache = XBUFFER (object)->syntax_cache; | |
| 366 if (!lookup_syntax_properties) | |
| 367 reset_buffer_syntax_cache_range (cache, object, 1); | |
| 368 } | |
| 369 else | |
| 826 | 370 init_syntax_cache (cache, object, buffer, 0); |
| 371 if (lookup_syntax_properties) | |
| 372 { | |
| 373 if (count <= 0) | |
| 374 { | |
| 375 from--; | |
| 2167 | 376 from = buffer_or_string_clip_to_accessible_char (cache->object, |
| 826 | 377 from); |
| 378 } | |
| 379 if (!(from >= cache->prev_change && from < cache->next_change)) | |
| 380 update_syntax_cache (cache, from, count); | |
| 381 } | |
| 1296 | 382 #ifdef NOT_WORTH_THE_EFFORT |
| 383 update_mirror_syntax_if_dirty (cache->mirror_table); | |
| 384 #endif /* NOT_WORTH_THE_EFFORT */ | |
| 826 | 385 return cache; |
| 386 } | |
| 387 | |
| 388 struct syntax_cache * | |
| 389 setup_buffer_syntax_cache (struct buffer *buffer, Charxpos from, int count) | |
| 390 { | |
| 391 return setup_syntax_cache (NULL, wrap_buffer (buffer), buffer, from, count); | |
| 392 } | |
| 393 | |
| 460 | 394 /* |
| 395 Update syntax_cache to an appropriate setting for position POS | |
| 396 | |
| 397 The sign of COUNT gives the relative position of POS wrt the | |
| 398 previously valid interval. (not currently used) | |
| 399 | |
| 400 `syntax_cache.*_change' are the next and previous positions at | |
| 401 which syntax_code and c_s_t will need to be recalculated. | |
| 402 | |
| 3025 | 403 #### Currently this code uses `get-char-property', which will |
| 460 | 404 return the "last smallest" extent at a given position. In cases |
| 405 where overlapping extents are defined, this code will simply use | |
| 406 whatever is returned by get-char-property. | |
| 407 | |
| 408 It might be worth it at some point to merge provided syntax tables | |
| 826 | 409 outward to the current buffer (#### rewrite in English please?!). */ |
| 460 | 410 |
| 411 void | |
| 2286 | 412 update_syntax_cache (struct syntax_cache *cache, Charxpos cpos, |
| 413 int UNUSED (count)) | |
| 460 | 414 { |
| 415 Lisp_Object tmp_table; | |
| 826 | 416 Bytexpos pos; |
| 417 Bytexpos lim; | |
| 418 Bytexpos next, prev; | |
| 419 int at_begin = 0, at_end = 0; | |
| 460 | 420 |
| 826 | 421 if (NILP (cache->object)) |
| 422 return; | |
| 423 | |
| 424 pos = buffer_or_string_charxpos_to_bytexpos (cache->object, cpos); | |
| 425 | |
| 426 tmp_table = get_char_property (pos, Qsyntax_table, cache->object, | |
| 427 EXTENT_AT_AFTER, 0); | |
| 2506 | 428 lim = next_previous_single_property_change (pos, Qsyntax_table, |
| 429 cache->object, -1, 1, 0); | |
| 826 | 430 if (lim < 0) |
| 460 | 431 { |
| 826 | 432 next = buffer_or_string_absolute_end_byte (cache->object); |
| 433 at_begin = 1; | |
| 460 | 434 } |
| 826 | 435 else |
| 436 next = lim; | |
| 460 | 437 |
| 826 | 438 if (pos < buffer_or_string_absolute_end_byte (cache->object)) |
| 439 pos = next_bytexpos (cache->object, pos); | |
| 2506 | 440 lim = next_previous_single_property_change (pos, Qsyntax_table, |
| 441 cache->object, -1, 0, 0); | |
| 826 | 442 if (lim < 0) |
| 460 | 443 { |
| 826 | 444 prev = buffer_or_string_absolute_begin_byte (cache->object); |
| 445 at_end = 1; | |
| 460 | 446 } |
| 447 else | |
| 826 | 448 prev = lim; |
| 460 | 449 |
| 826 | 450 cache->prev_change = |
| 451 buffer_or_string_bytexpos_to_charxpos (cache->object, prev); | |
| 452 cache->next_change = | |
| 453 buffer_or_string_bytexpos_to_charxpos (cache->object, next); | |
| 460 | 454 |
| 826 | 455 if (BUFFERP (cache->object)) |
| 456 { | |
| 457 /* If we are at the beginning or end of buffer, check to see if there's | |
| 458 a zero-length `syntax-table' extent there (highly unlikely); if not, | |
| 459 then we can safely make the end closed, so it will take in newly | |
| 460 inserted text. (If such an extent is inserted, we will be informed | |
| 3250 | 461 through signal_syntax_cache_extent_changed().) */ |
| 826 | 462 Fset_marker (cache->start, make_int (cache->prev_change), cache->object); |
| 463 Fset_marker_insertion_type | |
| 464 (cache->start, | |
| 465 at_begin && NILP (extent_at (prev, cache->object, Qsyntax_table, | |
| 466 NULL, EXTENT_AT_AT, 0)) | |
| 467 ? Qnil : Qt); | |
| 468 Fset_marker (cache->end, make_int (cache->next_change), cache->object); | |
| 469 Fset_marker_insertion_type | |
| 470 (cache->end, | |
| 471 at_end && NILP (extent_at (next, cache->object, Qsyntax_table, | |
| 472 NULL, EXTENT_AT_AT, 0)) | |
| 473 ? Qt : Qnil); | |
| 474 } | |
| 475 | |
| 476 if (!NILP (Fsyntax_table_p (tmp_table))) | |
| 477 { | |
| 478 cache->use_code = 0; | |
| 1296 | 479 cache->syntax_table = tmp_table; |
| 480 cache->mirror_table = XCHAR_TABLE (tmp_table)->mirror_table; | |
| 826 | 481 cache->no_syntax_table_prop = 0; |
| 1296 | 482 #ifdef NOT_WORTH_THE_EFFORT |
| 483 update_mirror_syntax_if_dirty (cache->mirror_table); | |
| 484 #endif /* NOT_WORTH_THE_EFFORT */ | |
| 826 | 485 } |
| 486 else if (CONSP (tmp_table) && INTP (XCAR (tmp_table))) | |
| 487 { | |
| 488 cache->use_code = 1; | |
| 489 cache->syntax_code = XINT (XCAR (tmp_table)); | |
| 490 cache->no_syntax_table_prop = 0; | |
| 491 } | |
| 492 else | |
| 493 { | |
| 494 cache->use_code = 0; | |
| 495 cache->no_syntax_table_prop = 1; | |
| 1296 | 496 cache->syntax_table = BUFFER_SYNTAX_TABLE (cache->buffer); |
| 497 cache->mirror_table = BUFFER_MIRROR_SYNTAX_TABLE (cache->buffer); | |
| 498 #ifdef NOT_WORTH_THE_EFFORT | |
| 499 update_mirror_syntax_if_dirty (cache->mirror_table); | |
| 500 #endif /* NOT_WORTH_THE_EFFORT */ | |
| 460 | 501 } |
| 502 } | |
| 3252 | 503 |
| 504 /* buffer-specific APIs used in buffer.c | |
| 505 #### This is really unclean; | |
| 506 the syntax cache should just be a LISP object */ | |
| 507 | |
| 508 void | |
| 509 mark_buffer_syntax_cache (struct buffer *buf) | |
| 510 { | |
| 511 struct syntax_cache *cache = buf->syntax_cache; | |
| 512 if (!cache) /* Vbuffer_defaults and such don't have caches */ | |
| 513 return; | |
| 514 mark_object (cache->object); | |
| 515 if (cache->buffer) | |
| 516 mark_object (wrap_buffer (cache->buffer)); | |
| 517 mark_object (cache->syntax_table); | |
| 518 mark_object (cache->mirror_table); | |
| 519 mark_object (cache->start); | |
| 520 mark_object (cache->end); | |
| 521 } | |
| 522 | |
| 523 void | |
| 524 init_buffer_syntax_cache (struct buffer *buf) | |
| 525 { | |
| 526 struct syntax_cache *cache; | |
| 527 #ifdef NEW_GC | |
| 528 buf->syntax_cache = alloc_lrecord_type (struct syntax_cache, | |
| 529 &lrecord_syntax_cache); | |
| 530 #else /* not NEW_GC */ | |
| 531 buf->syntax_cache = xnew_and_zero (struct syntax_cache); | |
| 532 #endif /* not NEW_GC */ | |
| 533 cache = buf->syntax_cache; | |
| 534 cache->object = wrap_buffer (buf); | |
| 535 cache->buffer = buf; | |
| 536 cache->no_syntax_table_prop = 1; | |
| 537 cache->syntax_table = BUFFER_SYNTAX_TABLE (cache->buffer); | |
| 538 cache->mirror_table = BUFFER_MIRROR_SYNTAX_TABLE (cache->buffer); | |
| 539 cache->start = Fmake_marker (); | |
| 540 cache->end = Fmake_marker (); | |
| 541 reset_buffer_syntax_cache_range (cache, cache->object, 0); | |
| 542 } | |
| 543 | |
| 544 /* finalize the syntax cache for BUF */ | |
| 545 | |
| 546 void | |
|
4710
3a87551bfeb5
Fixes for a number of minor warnings issued by gcc. See xemacs-patches message
Jerry James <james@xemacs.org>
parents:
4653
diff
changeset
|
547 uninit_buffer_syntax_cache (struct buffer *UNUSED_IF_NEW_GC (buf)) |
| 3252 | 548 { |
| 4141 | 549 #ifndef NEW_GC |
| 3252 | 550 xfree (buf->syntax_cache, struct syntax_cache *); |
| 551 buf->syntax_cache = 0; | |
| 4141 | 552 #endif /* not NEW_GC */ |
| 3252 | 553 } |
| 554 | |
| 555 /* extent-specific APIs used in extents.c and insdel.c */ | |
| 556 | |
| 557 /* The syntax-table property on the range covered by EXTENT may be changing, | |
| 558 either because EXTENT has a syntax-table property and is being attached | |
| 559 or detached (this includes having its endpoints changed), or because | |
| 560 the value of EXTENT's syntax-table property is changing. */ | |
| 561 | |
| 562 void | |
| 563 signal_syntax_cache_extent_changed (EXTENT extent) | |
| 564 { | |
| 565 Lisp_Object buffer = Fextent_object (wrap_extent (extent)); | |
| 566 if (BUFFERP (buffer)) | |
| 567 { | |
| 568 /* This was getting called with the buffer's start and end null, eg in | |
| 569 cperl mode, which triggers an assert in byte_marker_position. Cf | |
| 570 thread rooted at <yxz7j7xzk97.fsf@gimli.holgi.priv> on xemacs-beta. | |
| 571 <yxzfymklb6p.fsf@gimli.holgi.priv> has a recipe, but you also need | |
| 572 to delete or type SPC to get the crash. | |
| 573 #### Delete this comment when setup_syntax_cache is made sane. */ | |
| 574 struct syntax_cache *cache = XBUFFER (buffer)->syntax_cache; | |
| 575 /* #### would this be slower or less accurate in character terms? */ | |
| 576 Bytexpos start = extent_endpoint_byte (extent, 0); | |
| 577 Bytexpos end = extent_endpoint_byte (extent, 1); | |
| 578 Bytexpos start2 = byte_marker_position (cache->start); | |
| 579 Bytexpos end2 = byte_marker_position (cache->end); | |
| 580 /* If the extent is entirely before or entirely after the cache | |
| 581 range, it doesn't overlap. Otherwise, invalidate the range. */ | |
| 582 if (!(end < start2 || start > end2)) | |
| 583 reset_buffer_syntax_cache_range (cache, buffer, 0); | |
| 584 } | |
| 585 } | |
| 586 | |
| 587 /* Extents have been adjusted for insertion or deletion, so we need to | |
| 588 refetch the start and end position of the extent */ | |
| 589 void | |
| 590 signal_syntax_cache_extent_adjust (struct buffer *buf) | |
| 591 { | |
| 592 struct syntax_cache *cache = buf->syntax_cache; | |
| 593 /* If the cache was invalid before, leave it that way. We only want | |
| 594 to update the limits of validity when they were actually valid. */ | |
| 595 if (cache->prev_change < 0) | |
| 596 return; | |
| 597 cache->prev_change = marker_position (cache->start); | |
| 598 cache->next_change = marker_position (cache->end); | |
| 599 } | |
| 600 | |
| 601 | |
| 460 | 602 |
| 428 | 603 /* Convert a letter which signifies a syntax code |
| 604 into the code it signifies. | |
| 605 This is used by modify-syntax-entry, and other things. */ | |
| 606 | |
| 442 | 607 const unsigned char syntax_spec_code[0400] = |
| 428 | 608 { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
| 609 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 610 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 611 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 612 (char) Swhitespace, 0377, (char) Sstring, 0377, | |
| 613 (char) Smath, 0377, 0377, (char) Squote, | |
| 614 (char) Sopen, (char) Sclose, 0377, 0377, | |
| 615 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
| 616 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 617 0377, 0377, 0377, 0377, | |
| 618 (char) Scomment, 0377, (char) Sendcomment, 0377, | |
| 619 (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ | |
| 620 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 621 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
| 622 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
| 623 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
| 624 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
| 625 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
| 460 | 626 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
| 428 | 627 }; |
| 628 | |
| 460 | 629 const unsigned char syntax_code_spec[] = " .w_()'\"$\\/<>@!|"; |
| 428 | 630 |
| 631 DEFUN ("syntax-designator-chars", Fsyntax_designator_chars, 0, 0, 0, /* | |
| 632 Return a string of the recognized syntax designator chars. | |
| 633 The chars are ordered by their internal syntax codes, which are | |
| 634 numbered starting at 0. | |
| 635 */ | |
| 636 ()) | |
| 637 { | |
| 638 return Vsyntax_designator_chars_string; | |
| 639 } | |
| 640 | |
| 641 DEFUN ("char-syntax", Fchar_syntax, 1, 2, 0, /* | |
| 444 | 642 Return the syntax code of CHARACTER, described by a character. |
| 643 For example, if CHARACTER is a word constituent, | |
| 644 the character `?w' is returned. | |
| 428 | 645 The characters that correspond to various syntax codes |
| 646 are listed in the documentation of `modify-syntax-entry'. | |
| 444 | 647 Optional second argument SYNTAX-TABLE defaults to the current buffer's |
| 428 | 648 syntax table. |
| 649 */ | |
| 444 | 650 (character, syntax_table)) |
| 428 | 651 { |
| 826 | 652 Lisp_Object mirrortab; |
| 428 | 653 |
| 444 | 654 if (NILP (character)) |
| 428 | 655 { |
| 444 | 656 character = make_char ('\000'); |
| 428 | 657 } |
| 444 | 658 CHECK_CHAR_COERCE_INT (character); |
| 826 | 659 syntax_table = check_syntax_table (syntax_table, |
| 660 current_buffer->syntax_table); | |
| 661 mirrortab = XCHAR_TABLE (syntax_table)->mirror_table; | |
| 662 return make_char (syntax_code_spec[(int) SYNTAX (mirrortab, | |
| 663 XCHAR (character))]); | |
| 428 | 664 } |
| 665 | |
| 666 #ifdef MULE | |
| 667 | |
| 668 enum syntaxcode | |
| 2286 | 669 charset_syntax (struct buffer *UNUSED (buf), Lisp_Object UNUSED (charset), |
| 670 int *multi_p_out) | |
| 428 | 671 { |
| 672 *multi_p_out = 1; | |
| 826 | 673 /* !!#### get this right */ |
| 3152 | 674 return Sword; |
| 428 | 675 } |
| 676 | |
| 677 #endif | |
| 678 | |
| 679 Lisp_Object | |
| 867 | 680 syntax_match (Lisp_Object syntax_table, Ichar ch) |
| 428 | 681 { |
| 826 | 682 Lisp_Object code = get_char_table (ch, syntax_table); |
| 428 | 683 Lisp_Object code2 = code; |
| 684 | |
| 685 if (CONSP (code)) | |
| 686 code2 = XCAR (code); | |
| 687 if (SYNTAX_FROM_CODE (XINT (code2)) == Sinherit) | |
| 826 | 688 code = get_char_table (ch, Vstandard_syntax_table); |
| 428 | 689 |
| 690 return CONSP (code) ? XCDR (code) : Qnil; | |
| 691 } | |
| 692 | |
| 693 DEFUN ("matching-paren", Fmatching_paren, 1, 2, 0, /* | |
| 444 | 694 Return the matching parenthesis of CHARACTER, or nil if none. |
| 695 Optional second argument SYNTAX-TABLE defaults to the current buffer's | |
| 428 | 696 syntax table. |
| 697 */ | |
| 444 | 698 (character, syntax_table)) |
| 428 | 699 { |
| 826 | 700 Lisp_Object mirrortab; |
| 1315 | 701 enum syntaxcode code; |
| 428 | 702 |
| 444 | 703 CHECK_CHAR_COERCE_INT (character); |
| 826 | 704 syntax_table = check_syntax_table (syntax_table, |
| 705 current_buffer->syntax_table); | |
| 706 mirrortab = XCHAR_TABLE (syntax_table)->mirror_table; | |
| 444 | 707 code = SYNTAX (mirrortab, XCHAR (character)); |
| 428 | 708 if (code == Sopen || code == Sclose || code == Sstring) |
| 444 | 709 return syntax_match (syntax_table, XCHAR (character)); |
| 428 | 710 return Qnil; |
| 711 } | |
| 712 | |
| 713 | |
| 714 | |
| 715 #ifdef MULE | |
| 716 /* Return 1 if there is a word boundary between two word-constituent | |
| 717 characters C1 and C2 if they appear in this order, else return 0. | |
| 718 There is no word boundary between two word-constituent ASCII | |
| 719 characters. */ | |
| 720 #define WORD_BOUNDARY_P(c1, c2) \ | |
| 867 | 721 (!(ichar_ascii_p (c1) && ichar_ascii_p (c2)) \ |
| 428 | 722 && word_boundary_p (c1, c2)) |
| 723 #endif | |
| 724 | |
| 725 /* Return the position across COUNT words from FROM. | |
| 726 If that many words cannot be found before the end of the buffer, return 0. | |
| 727 COUNT negative means scan backward and stop at word beginning. */ | |
| 728 | |
| 665 | 729 Charbpos |
| 730 scan_words (struct buffer *buf, Charbpos from, int count) | |
| 428 | 731 { |
| 665 | 732 Charbpos limit = count > 0 ? BUF_ZV (buf) : BUF_BEGV (buf); |
| 867 | 733 Ichar ch0, ch1; |
| 428 | 734 enum syntaxcode code; |
| 826 | 735 struct syntax_cache *scache = setup_buffer_syntax_cache (buf, from, count); |
| 460 | 736 |
| 428 | 737 /* #### is it really worth it to hand expand both cases? JV */ |
| 738 while (count > 0) | |
| 739 { | |
| 740 QUIT; | |
| 741 | |
| 742 while (1) | |
| 743 { | |
| 744 if (from == limit) | |
| 745 return 0; | |
| 746 | |
| 826 | 747 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 748 ch0 = BUF_FETCH_CHAR (buf, from); |
| 826 | 749 code = SYNTAX_FROM_CACHE (scache, ch0); |
| 428 | 750 |
| 442 | 751 from++; |
| 428 | 752 if (words_include_escapes |
| 753 && (code == Sescape || code == Scharquote)) | |
| 754 break; | |
| 755 if (code == Sword) | |
| 756 break; | |
| 757 } | |
| 758 | |
| 759 QUIT; | |
| 760 | |
| 761 while (from != limit) | |
| 762 { | |
| 826 | 763 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 764 ch1 = BUF_FETCH_CHAR (buf, from); |
| 826 | 765 code = SYNTAX_FROM_CACHE (scache, ch1); |
| 428 | 766 if (!(words_include_escapes |
| 767 && (code == Sescape || code == Scharquote))) | |
| 768 if (code != Sword | |
| 769 #ifdef MULE | |
| 770 || WORD_BOUNDARY_P (ch0, ch1) | |
| 434 | 771 #endif |
| 428 | 772 ) |
| 773 break; | |
| 774 #ifdef MULE | |
| 775 ch0 = ch1; | |
| 434 | 776 #endif |
| 428 | 777 from++; |
| 778 } | |
| 779 count--; | |
| 780 } | |
| 781 | |
| 782 while (count < 0) | |
| 783 { | |
| 784 QUIT; | |
| 785 | |
| 786 while (1) | |
| 787 { | |
| 788 if (from == limit) | |
| 789 return 0; | |
| 790 | |
| 826 | 791 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 428 | 792 ch1 = BUF_FETCH_CHAR (buf, from - 1); |
| 826 | 793 code = SYNTAX_FROM_CACHE (scache, ch1); |
| 460 | 794 from--; |
| 442 | 795 |
| 428 | 796 if (words_include_escapes |
| 797 && (code == Sescape || code == Scharquote)) | |
| 798 break; | |
| 799 if (code == Sword) | |
| 800 break; | |
| 801 } | |
| 802 | |
| 803 QUIT; | |
| 804 | |
| 805 while (from != limit) | |
| 806 { | |
| 826 | 807 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 428 | 808 ch0 = BUF_FETCH_CHAR (buf, from - 1); |
| 826 | 809 code = SYNTAX_FROM_CACHE (scache, ch0); |
| 460 | 810 |
| 428 | 811 if (!(words_include_escapes |
| 812 && (code == Sescape || code == Scharquote))) | |
| 813 if (code != Sword | |
| 814 #ifdef MULE | |
| 815 || WORD_BOUNDARY_P (ch0, ch1) | |
| 816 #endif | |
| 817 ) | |
| 818 break; | |
| 819 #ifdef MULE | |
| 820 ch1 = ch0; | |
| 821 #endif | |
| 822 from--; | |
| 823 } | |
| 824 count++; | |
| 825 } | |
| 826 | |
| 827 return from; | |
| 828 } | |
| 829 | |
| 446 | 830 DEFUN ("forward-word", Fforward_word, 0, 2, "_p", /* |
| 428 | 831 Move point forward COUNT words (backward if COUNT is negative). |
| 446 | 832 Normally t is returned, but if an edge of the buffer is reached, |
| 833 point is left there and nil is returned. | |
| 428 | 834 |
| 462 | 835 The characters that are moved over may be added to the current selection |
| 836 \(i.e. active region) if the Shift key is held down, a motion key is used | |
| 837 to invoke this command, and `shifted-motion-keys-select-region' is t; see | |
| 838 the documentation for this variable for more details. | |
| 839 | |
| 446 | 840 COUNT defaults to 1, and BUFFER defaults to the current buffer. |
| 428 | 841 */ |
| 842 (count, buffer)) | |
| 843 { | |
| 665 | 844 Charbpos val; |
| 428 | 845 struct buffer *buf = decode_buffer (buffer, 0); |
| 446 | 846 EMACS_INT n; |
| 847 | |
| 848 if (NILP (count)) | |
| 849 n = 1; | |
| 850 else | |
| 851 { | |
| 852 CHECK_INT (count); | |
| 853 n = XINT (count); | |
| 854 } | |
| 428 | 855 |
| 446 | 856 val = scan_words (buf, BUF_PT (buf), n); |
| 857 if (val) | |
| 428 | 858 { |
| 446 | 859 BUF_SET_PT (buf, val); |
| 860 return Qt; | |
| 861 } | |
| 862 else | |
| 863 { | |
| 864 BUF_SET_PT (buf, n > 0 ? BUF_ZV (buf) : BUF_BEGV (buf)); | |
| 428 | 865 return Qnil; |
| 866 } | |
| 867 } | |
| 868 | |
| 869 static void scan_sexps_forward (struct buffer *buf, | |
| 870 struct lisp_parse_state *, | |
| 665 | 871 Charbpos from, Charbpos end, |
| 428 | 872 int targetdepth, int stopbefore, |
| 873 Lisp_Object oldstate, | |
| 874 int commentstop); | |
| 875 | |
| 876 static int | |
| 665 | 877 find_start_of_comment (struct buffer *buf, Charbpos from, Charbpos stop, |
| 460 | 878 int comstyle) |
| 428 | 879 { |
| 867 | 880 Ichar c; |
| 428 | 881 enum syntaxcode code; |
| 882 | |
| 883 /* Look back, counting the parity of string-quotes, | |
| 884 and recording the comment-starters seen. | |
| 885 When we reach a safe place, assume that's not in a string; | |
| 886 then step the main scan to the earliest comment-starter seen | |
| 887 an even number of string quotes away from the safe place. | |
| 888 | |
| 889 OFROM[I] is position of the earliest comment-starter seen | |
| 890 which is I+2X quotes from the comment-end. | |
| 891 PARITY is current parity of quotes from the comment end. */ | |
| 892 int parity = 0; | |
| 867 | 893 Ichar my_stringend = 0; |
| 428 | 894 int string_lossage = 0; |
| 665 | 895 Charbpos comment_end = from; |
| 896 Charbpos comstart_pos = 0; | |
| 428 | 897 int comstart_parity = 0; |
| 898 int styles_match_p = 0; | |
| 460 | 899 /* mask to match comment styles against; for ST_COMMENT_STYLE, this |
| 900 will get set to SYNTAX_COMMENT_STYLE_B, but never get checked */ | |
| 901 int mask = comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A; | |
| 826 | 902 struct syntax_cache *scache = buf->syntax_cache; |
| 428 | 903 |
| 904 /* At beginning of range to scan, we're outside of strings; | |
| 905 that determines quote parity to the comment-end. */ | |
| 906 while (from != stop) | |
| 907 { | |
| 460 | 908 int syncode; |
| 909 | |
| 428 | 910 /* Move back and examine a character. */ |
| 911 from--; | |
| 826 | 912 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 428 | 913 |
| 914 c = BUF_FETCH_CHAR (buf, from); | |
| 826 | 915 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 916 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 917 |
| 918 /* is this a 1-char comment end sequence? if so, try | |
| 919 to see if style matches previously extracted mask */ | |
| 920 if (code == Sendcomment) | |
| 921 { | |
| 922 styles_match_p = | |
| 460 | 923 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) & mask; |
| 428 | 924 } |
| 925 | |
| 926 /* or are we looking at a 1-char comment start sequence | |
| 927 of the style matching mask? */ | |
| 460 | 928 else if (code == Scomment) |
| 428 | 929 { |
| 460 | 930 styles_match_p = |
| 931 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) & mask; | |
| 428 | 932 } |
| 933 | |
| 460 | 934 /* otherwise, is this a 2-char comment end or start sequence? */ |
| 935 else if (from > stop) | |
| 936 do | |
| 937 { | |
| 938 /* 2-char comment end sequence? */ | |
| 939 if (SYNTAX_CODE_END_SECOND_P (syncode)) | |
| 940 { | |
| 941 int prev_syncode; | |
| 826 | 942 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 460 | 943 prev_syncode = |
| 1315 | 944 SYNTAX_CODE_FROM_CACHE (scache, |
| 945 BUF_FETCH_CHAR (buf, from - 1)); | |
| 460 | 946 |
| 947 if (SYNTAX_CODES_END_P (prev_syncode, syncode)) | |
| 948 { | |
| 949 code = Sendcomment; | |
| 950 styles_match_p = | |
| 826 | 951 SYNTAX_CODES_COMMENT_MASK_END (prev_syncode, |
| 952 syncode) & mask; | |
| 460 | 953 from--; |
| 826 | 954 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 460 | 955 c = BUF_FETCH_CHAR (buf, from); |
| 956 | |
| 957 /* Found a comment-end sequence, so skip past the | |
| 958 check for a comment-start */ | |
| 959 break; | |
| 960 } | |
| 961 } | |
| 962 | |
| 963 /* 2-char comment start sequence? */ | |
| 964 if (SYNTAX_CODE_START_SECOND_P (syncode)) | |
| 965 { | |
| 966 int prev_syncode; | |
| 826 | 967 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 460 | 968 prev_syncode = |
| 1315 | 969 SYNTAX_CODE_FROM_CACHE (scache, |
| 970 BUF_FETCH_CHAR (buf, from - 1)); | |
| 460 | 971 |
| 972 if (SYNTAX_CODES_START_P (prev_syncode, syncode)) | |
| 973 { | |
| 974 code = Scomment; | |
| 975 styles_match_p = | |
| 826 | 976 SYNTAX_CODES_COMMENT_MASK_START (prev_syncode, |
| 977 syncode) & mask; | |
| 460 | 978 from--; |
| 826 | 979 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 460 | 980 c = BUF_FETCH_CHAR (buf, from); |
| 981 } | |
| 982 } | |
| 983 } while (0); | |
| 428 | 984 |
| 985 /* Ignore escaped characters. */ | |
| 986 if (char_quoted (buf, from)) | |
| 987 continue; | |
| 988 | |
| 989 /* Track parity of quotes. */ | |
| 990 if (code == Sstring) | |
| 991 { | |
| 992 parity ^= 1; | |
| 993 if (my_stringend == 0) | |
| 994 my_stringend = c; | |
| 995 /* If we have two kinds of string delimiters. | |
| 996 There's no way to grok this scanning backwards. */ | |
| 997 else if (my_stringend != c) | |
| 998 string_lossage = 1; | |
| 999 } | |
| 1000 | |
| 460 | 1001 if (code == Sstring_fence || code == Scomment_fence) |
| 1002 { | |
| 1003 parity ^= 1; | |
| 1004 if (my_stringend == 0) | |
| 1005 my_stringend = | |
| 1006 code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE; | |
| 1007 /* If we have two kinds of string delimiters. | |
| 1008 There's no way to grok this scanning backwards. */ | |
| 1009 else if (my_stringend != (code == Sstring_fence | |
| 1010 ? ST_STRING_STYLE : ST_COMMENT_STYLE)) | |
| 1011 string_lossage = 1; | |
| 1012 } | |
| 1013 | |
| 428 | 1014 /* Record comment-starters according to that |
| 1015 quote-parity to the comment-end. */ | |
| 1016 if (code == Scomment && styles_match_p) | |
| 1017 { | |
| 1018 comstart_parity = parity; | |
| 1019 comstart_pos = from; | |
| 1020 } | |
| 1021 | |
| 1022 /* If we find another earlier comment-ender, | |
| 1023 any comment-starts earlier than that don't count | |
| 1024 (because they go with the earlier comment-ender). */ | |
| 1025 if (code == Sendcomment && styles_match_p) | |
| 1026 break; | |
| 1027 | |
| 1028 /* Assume a defun-start point is outside of strings. */ | |
| 1029 if (code == Sopen | |
| 1030 && (from == stop || BUF_FETCH_CHAR (buf, from - 1) == '\n')) | |
| 1031 break; | |
| 1032 } | |
| 1033 | |
| 1034 if (comstart_pos == 0) | |
| 1035 from = comment_end; | |
| 1036 /* If the earliest comment starter | |
| 1037 is followed by uniform paired string quotes or none, | |
| 1038 we know it can't be inside a string | |
| 1039 since if it were then the comment ender would be inside one. | |
| 1040 So it does start a comment. Skip back to it. */ | |
| 1041 else if (comstart_parity == 0 && !string_lossage) | |
| 1042 from = comstart_pos; | |
| 1043 else | |
| 1044 { | |
| 1045 /* We had two kinds of string delimiters mixed up | |
| 1046 together. Decode this going forwards. | |
| 1047 Scan fwd from the previous comment ender | |
| 1048 to the one in question; this records where we | |
| 1049 last passed a comment starter. */ | |
| 1050 | |
| 1051 struct lisp_parse_state state; | |
| 1052 scan_sexps_forward (buf, &state, find_defun_start (buf, comment_end), | |
| 1053 comment_end - 1, -10000, 0, Qnil, 0); | |
| 1054 if (state.incomment) | |
| 460 | 1055 from = state.comstr_start; |
| 428 | 1056 else |
| 1057 /* We can't grok this as a comment; scan it normally. */ | |
| 1058 from = comment_end; | |
| 826 | 1059 UPDATE_SYNTAX_CACHE_FORWARD (scache, from - 1); |
| 428 | 1060 } |
| 1061 return from; | |
| 1062 } | |
| 1063 | |
| 665 | 1064 static Charbpos |
| 826 | 1065 find_end_of_comment (struct buffer *buf, Charbpos from, Charbpos stop, |
| 1066 int comstyle) | |
| 428 | 1067 { |
| 1068 int c; | |
| 460 | 1069 int prev_code; |
| 1070 /* mask to match comment styles against; for ST_COMMENT_STYLE, this | |
| 1071 will get set to SYNTAX_COMMENT_STYLE_B, but never get checked */ | |
| 1072 int mask = comstyle ? SYNTAX_COMMENT_STYLE_B : SYNTAX_COMMENT_STYLE_A; | |
| 826 | 1073 struct syntax_cache *scache = buf->syntax_cache; |
| 428 | 1074 |
| 460 | 1075 /* This is only called by functions which have already set up the |
| 1076 syntax_cache and are keeping it up-to-date */ | |
| 428 | 1077 while (1) |
| 1078 { | |
| 1079 if (from == stop) | |
| 1080 { | |
| 1081 return -1; | |
| 1082 } | |
| 460 | 1083 |
| 826 | 1084 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1085 c = BUF_FETCH_CHAR (buf, from); |
| 460 | 1086 |
| 1087 /* Test for generic comments */ | |
| 1088 if (comstyle == ST_COMMENT_STYLE) | |
| 1089 { | |
| 826 | 1090 if (SYNTAX_FROM_CACHE (scache, c) == Scomment_fence) |
| 460 | 1091 { |
| 1092 from++; | |
| 826 | 1093 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1094 break; |
| 1095 } | |
| 1096 from++; | |
| 1097 continue; /* No need to test other comment styles in a | |
| 1098 generic comment */ | |
| 1099 } | |
| 1100 else | |
| 1101 | |
| 826 | 1102 if (SYNTAX_FROM_CACHE (scache, c) == Sendcomment |
| 460 | 1103 && SYNTAX_CODE_MATCHES_1CHAR_P |
| 826 | 1104 (SYNTAX_CODE_FROM_CACHE (scache, c), mask)) |
| 428 | 1105 /* we have encountered a comment end of the same style |
| 1106 as the comment sequence which began this comment | |
| 1107 section */ | |
| 460 | 1108 { |
| 1109 from++; | |
| 826 | 1110 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1111 break; |
| 1112 } | |
| 428 | 1113 |
| 826 | 1114 prev_code = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 428 | 1115 from++; |
| 826 | 1116 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1117 if (from < stop |
| 460 | 1118 && SYNTAX_CODES_MATCH_END_P |
| 1119 (prev_code, | |
| 826 | 1120 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from)), |
| 460 | 1121 mask) |
| 1122 | |
| 1123 ) | |
| 428 | 1124 /* we have encountered a comment end of the same style |
| 1125 as the comment sequence which began this comment | |
| 1126 section */ | |
| 460 | 1127 { |
| 1128 from++; | |
| 826 | 1129 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1130 break; |
| 1131 } | |
| 428 | 1132 } |
| 1133 return from; | |
| 1134 } | |
| 1135 | |
| 1136 | |
| 1137 /* #### between FSF 19.23 and 19.28 there are some changes to the logic | |
| 1138 in this function (and minor changes to find_start_of_comment(), | |
| 1139 above, which is part of Fforward_comment() in FSF). Attempts to port | |
| 1140 that logic made this function break, so I'm leaving it out. If anyone | |
| 1141 ever complains about this function not working properly, take a look | |
| 1142 at those changes. --ben */ | |
| 1143 | |
| 446 | 1144 DEFUN ("forward-comment", Fforward_comment, 0, 2, 0, /* |
| 444 | 1145 Move forward across up to COUNT comments, or backwards if COUNT is negative. |
| 428 | 1146 Stop scanning if we find something other than a comment or whitespace. |
| 1147 Set point to where scanning stops. | |
| 444 | 1148 If COUNT comments are found as expected, with nothing except whitespace |
| 428 | 1149 between them, return t; otherwise return nil. |
| 1150 Point is set in either case. | |
| 446 | 1151 COUNT defaults to 1, and BUFFER defaults to the current buffer. |
| 428 | 1152 */ |
| 444 | 1153 (count, buffer)) |
| 428 | 1154 { |
| 665 | 1155 Charbpos from; |
| 1156 Charbpos stop; | |
| 867 | 1157 Ichar c; |
| 428 | 1158 enum syntaxcode code; |
| 460 | 1159 int syncode; |
| 444 | 1160 EMACS_INT n; |
| 428 | 1161 struct buffer *buf = decode_buffer (buffer, 0); |
| 826 | 1162 struct syntax_cache *scache; |
| 1163 | |
| 446 | 1164 if (NILP (count)) |
| 1165 n = 1; | |
| 1166 else | |
| 1167 { | |
| 1168 CHECK_INT (count); | |
| 1169 n = XINT (count); | |
| 1170 } | |
| 428 | 1171 |
| 1172 from = BUF_PT (buf); | |
| 1173 | |
| 826 | 1174 scache = setup_buffer_syntax_cache (buf, from, n); |
| 444 | 1175 while (n > 0) |
| 428 | 1176 { |
| 1177 QUIT; | |
| 1178 | |
| 1179 stop = BUF_ZV (buf); | |
| 1180 while (from < stop) | |
| 1181 { | |
| 460 | 1182 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1183 |
| 1184 if (char_quoted (buf, from)) | |
| 1185 { | |
| 1186 from++; | |
| 1187 continue; | |
| 1188 } | |
| 1189 | |
| 826 | 1190 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1191 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 1192 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1193 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1194 |
| 1195 if (code == Scomment) | |
| 1196 { | |
| 1197 /* we have encountered a single character comment start | |
| 1198 sequence, and we are ignoring all text inside comments. | |
| 1199 we must record the comment style this character begins | |
| 1200 so that later, only a comment end of the same style actually | |
| 1201 ends the comment section */ | |
| 460 | 1202 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) |
| 1203 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1204 } |
| 1205 | |
| 460 | 1206 else if (code == Scomment_fence) |
| 1207 { | |
| 1208 from++; | |
| 1209 code = Scomment; | |
| 1210 comstyle = ST_COMMENT_STYLE; | |
| 1211 } | |
| 1212 | |
| 428 | 1213 else if (from < stop |
| 460 | 1214 && SYNTAX_CODE_START_FIRST_P (syncode)) |
| 428 | 1215 { |
| 460 | 1216 int next_syncode; |
| 826 | 1217 UPDATE_SYNTAX_CACHE_FORWARD (scache, from + 1); |
| 460 | 1218 next_syncode = |
| 826 | 1219 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from + 1)); |
| 460 | 1220 |
| 1221 if (SYNTAX_CODES_START_P (syncode, next_syncode)) | |
| 1222 { | |
| 1223 /* we have encountered a 2char comment start sequence and we | |
| 1224 are ignoring all text inside comments. we must record | |
| 1225 the comment style this sequence begins so that later, | |
| 1226 only a comment end of the same style actually ends | |
| 1227 the comment section */ | |
| 1228 code = Scomment; | |
| 1229 comstyle = | |
| 1230 SYNTAX_CODES_COMMENT_MASK_START (syncode, next_syncode) | |
| 1231 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1232 from++; | |
| 1233 } | |
| 428 | 1234 } |
| 1235 | |
| 1236 if (code == Scomment) | |
| 1237 { | |
| 826 | 1238 Charbpos newfrom = find_end_of_comment (buf, from, stop, |
| 1239 comstyle); | |
| 428 | 1240 if (newfrom < 0) |
| 1241 { | |
| 1242 /* we stopped because from==stop */ | |
| 1243 BUF_SET_PT (buf, stop); | |
| 1244 return Qnil; | |
| 1245 } | |
| 1246 from = newfrom; | |
| 1247 | |
| 1248 /* We have skipped one comment. */ | |
| 1249 break; | |
| 1250 } | |
| 1251 else if (code != Swhitespace | |
| 1252 && code != Sendcomment | |
| 1253 && code != Scomment ) | |
| 1254 { | |
| 1255 BUF_SET_PT (buf, from); | |
| 1256 return Qnil; | |
| 1257 } | |
| 1258 from++; | |
| 1259 } | |
| 1260 | |
| 1261 /* End of comment reached */ | |
| 444 | 1262 n--; |
| 428 | 1263 } |
| 1264 | |
| 444 | 1265 while (n < 0) |
| 428 | 1266 { |
| 1267 QUIT; | |
| 1268 | |
| 1269 stop = BUF_BEGV (buf); | |
| 1270 while (from > stop) | |
| 1271 { | |
| 460 | 1272 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1273 |
| 1274 from--; | |
| 1275 if (char_quoted (buf, from)) | |
| 1276 { | |
| 1277 from--; | |
| 1278 continue; | |
| 1279 } | |
| 1280 | |
| 1281 c = BUF_FETCH_CHAR (buf, from); | |
| 826 | 1282 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1283 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1284 |
| 1285 if (code == Sendcomment) | |
| 1286 { | |
| 1287 /* we have found a single char end comment. we must record | |
| 1288 the comment style encountered so that later, we can match | |
| 1289 only the proper comment begin sequence of the same style */ | |
| 460 | 1290 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) |
| 1291 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1292 } | |
| 1293 | |
| 1294 else if (code == Scomment_fence) | |
| 1295 { | |
| 1296 code = Sendcomment; | |
| 1297 comstyle = ST_COMMENT_STYLE; | |
| 428 | 1298 } |
| 1299 | |
| 1300 else if (from > stop | |
| 460 | 1301 && SYNTAX_CODE_END_SECOND_P (syncode)) |
| 428 | 1302 { |
| 460 | 1303 int prev_syncode; |
| 826 | 1304 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 460 | 1305 prev_syncode = |
| 826 | 1306 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from - 1)); |
| 460 | 1307 if (SYNTAX_CODES_END_P (prev_syncode, syncode)) |
| 1308 { | |
| 1309 /* We must record the comment style encountered so that | |
| 1310 later, we can match only the proper comment begin | |
| 1311 sequence of the same style. */ | |
| 1312 code = Sendcomment; | |
| 1313 comstyle = SYNTAX_CODES_COMMENT_MASK_END | |
| 1314 (prev_syncode, syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1315 from--; | |
| 1316 } | |
| 428 | 1317 } |
| 1318 | |
| 1319 if (code == Sendcomment) | |
| 1320 { | |
| 460 | 1321 from = find_start_of_comment (buf, from, stop, comstyle); |
| 428 | 1322 break; |
| 1323 } | |
| 1324 | |
| 1325 else if (code != Swhitespace | |
| 460 | 1326 && code != Scomment |
| 1327 && code != Sendcomment) | |
| 428 | 1328 { |
| 1329 BUF_SET_PT (buf, from + 1); | |
| 1330 return Qnil; | |
| 1331 } | |
| 1332 } | |
| 1333 | |
| 444 | 1334 n++; |
| 428 | 1335 } |
| 1336 | |
| 1337 BUF_SET_PT (buf, from); | |
| 1338 return Qt; | |
| 1339 } | |
| 1340 | |
| 1341 | |
| 1342 Lisp_Object | |
| 665 | 1343 scan_lists (struct buffer *buf, Charbpos from, int count, int depth, |
| 444 | 1344 int sexpflag, int noerror) |
| 428 | 1345 { |
| 665 | 1346 Charbpos stop; |
| 867 | 1347 Ichar c; |
| 428 | 1348 int quoted; |
| 1349 int mathexit = 0; | |
| 1350 enum syntaxcode code; | |
| 460 | 1351 int syncode; |
| 428 | 1352 int min_depth = depth; /* Err out if depth gets less than this. */ |
| 826 | 1353 struct syntax_cache *scache; |
| 1354 | |
| 428 | 1355 if (depth > 0) min_depth = 0; |
| 1356 | |
| 826 | 1357 scache = setup_buffer_syntax_cache (buf, from, count); |
| 428 | 1358 while (count > 0) |
| 1359 { | |
| 1360 QUIT; | |
| 1361 | |
| 1362 stop = BUF_ZV (buf); | |
| 1363 while (from < stop) | |
| 1364 { | |
| 460 | 1365 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1366 |
| 826 | 1367 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1368 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 1369 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1370 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1371 from++; |
| 1372 | |
| 1373 /* a 1-char comment start sequence */ | |
| 1374 if (code == Scomment && parse_sexp_ignore_comments) | |
| 1375 { | |
| 460 | 1376 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) == |
| 1377 SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1378 } |
| 1379 | |
| 1380 /* else, a 2-char comment start sequence? */ | |
| 1381 else if (from < stop | |
| 460 | 1382 && SYNTAX_CODE_START_FIRST_P (syncode) |
| 428 | 1383 && parse_sexp_ignore_comments) |
| 1384 { | |
| 460 | 1385 int next_syncode; |
| 826 | 1386 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1387 next_syncode = |
| 826 | 1388 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from)); |
| 460 | 1389 |
| 1390 if (SYNTAX_CODES_START_P (syncode, next_syncode)) | |
| 1391 { | |
| 826 | 1392 /* we have encountered a comment start sequence and we |
| 1393 are ignoring all text inside comments. we must record | |
| 1394 the comment style this sequence begins so that later, | |
| 1395 only a comment end of the same style actually ends | |
| 1396 the comment section */ | |
| 1397 code = Scomment; | |
| 460 | 1398 comstyle = SYNTAX_CODES_COMMENT_MASK_START |
| 1399 (syncode, next_syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 826 | 1400 from++; |
| 1401 } | |
| 428 | 1402 } |
| 826 | 1403 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1404 |
| 460 | 1405 if (SYNTAX_CODE_PREFIX (syncode)) |
| 428 | 1406 continue; |
| 1407 | |
| 1408 switch (code) | |
| 1409 { | |
| 1410 case Sescape: | |
| 1411 case Scharquote: | |
| 1412 if (from == stop) goto lose; | |
| 1413 from++; | |
| 1414 /* treat following character as a word constituent */ | |
| 1415 case Sword: | |
| 1416 case Ssymbol: | |
| 1417 if (depth || !sexpflag) break; | |
| 1418 /* This word counts as a sexp; return at end of it. */ | |
| 1419 while (from < stop) | |
| 1420 { | |
| 826 | 1421 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 1422 switch (SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from))) | |
| 428 | 1423 { |
| 1424 case Scharquote: | |
| 1425 case Sescape: | |
| 1426 from++; | |
| 1427 if (from == stop) goto lose; | |
| 1428 break; | |
| 1429 case Sword: | |
| 1430 case Ssymbol: | |
| 1431 case Squote: | |
| 1432 break; | |
| 1433 default: | |
| 1434 goto done; | |
| 1435 } | |
| 1436 from++; | |
| 1437 } | |
| 1438 goto done; | |
| 1439 | |
| 460 | 1440 case Scomment_fence: |
| 1441 comstyle = ST_COMMENT_STYLE; | |
| 428 | 1442 case Scomment: |
| 1443 if (!parse_sexp_ignore_comments) | |
| 1444 break; | |
| 826 | 1445 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 1446 { |
| 665 | 1447 Charbpos newfrom = |
| 460 | 1448 find_end_of_comment (buf, from, stop, comstyle); |
| 428 | 1449 if (newfrom < 0) |
| 1450 { | |
| 1451 /* we stopped because from == stop in search forward */ | |
| 1452 from = stop; | |
| 1453 if (depth == 0) | |
| 1454 goto done; | |
| 1455 goto lose; | |
| 1456 } | |
| 1457 from = newfrom; | |
| 1458 } | |
| 1459 break; | |
| 1460 | |
| 1461 case Smath: | |
| 1462 if (!sexpflag) | |
| 1463 break; | |
| 1464 if (from != stop && c == BUF_FETCH_CHAR (buf, from)) | |
| 1465 from++; | |
| 1466 if (mathexit) | |
| 1467 { | |
| 1468 mathexit = 0; | |
| 1469 goto close1; | |
| 1470 } | |
| 1471 mathexit = 1; | |
| 1472 | |
| 1473 case Sopen: | |
| 1474 if (!++depth) goto done; | |
| 1475 break; | |
| 1476 | |
| 1477 case Sclose: | |
| 1478 close1: | |
| 1479 if (!--depth) goto done; | |
| 1480 if (depth < min_depth) | |
| 1481 { | |
| 444 | 1482 if (noerror) |
| 428 | 1483 return Qnil; |
| 826 | 1484 syntax_error ("Containing expression ends prematurely", |
| 1485 Qunbound); | |
| 428 | 1486 } |
| 1487 break; | |
| 1488 | |
| 460 | 1489 case Sstring_fence: |
| 428 | 1490 case Sstring: |
| 1491 { | |
| 867 | 1492 Ichar stringterm; |
| 460 | 1493 |
| 1494 if (code != Sstring_fence) | |
| 1495 { | |
| 826 | 1496 /* XEmacs change: call syntax_match on character */ |
| 867 | 1497 Ichar ch = BUF_FETCH_CHAR (buf, from - 1); |
| 460 | 1498 Lisp_Object stermobj = |
| 1296 | 1499 syntax_match (scache->syntax_table, ch); |
| 428 | 1500 |
| 1501 if (CHARP (stermobj)) | |
| 1502 stringterm = XCHAR (stermobj); | |
| 1503 else | |
| 1504 stringterm = ch; | |
| 460 | 1505 } |
| 1506 else | |
| 1507 stringterm = '\0'; /* avoid compiler warnings */ | |
| 428 | 1508 |
| 1509 while (1) | |
| 1510 { | |
| 1511 if (from >= stop) | |
| 1512 goto lose; | |
| 826 | 1513 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1514 c = BUF_FETCH_CHAR (buf, from); |
| 1515 if (code == Sstring | |
| 1516 ? c == stringterm | |
| 826 | 1517 : SYNTAX_FROM_CACHE (scache, c) == Sstring_fence) |
| 428 | 1518 break; |
| 460 | 1519 |
| 826 | 1520 switch (SYNTAX_FROM_CACHE (scache, c)) |
| 428 | 1521 { |
| 1522 case Scharquote: | |
| 1523 case Sescape: | |
| 1524 from++; | |
| 1525 break; | |
| 1526 default: | |
| 1527 break; | |
| 1528 } | |
| 1529 from++; | |
| 1530 } | |
| 1531 from++; | |
| 1532 if (!depth && sexpflag) goto done; | |
| 1533 break; | |
| 1534 } | |
| 1535 | |
| 1536 default: | |
| 1537 break; | |
| 1538 } | |
| 1539 } | |
| 1540 | |
| 1541 /* Reached end of buffer. Error if within object, | |
| 1542 return nil if between */ | |
| 1543 if (depth) goto lose; | |
| 1544 | |
| 1545 return Qnil; | |
| 1546 | |
| 1547 /* End of object reached */ | |
| 1548 done: | |
| 1549 count--; | |
| 1550 } | |
| 1551 | |
| 1552 while (count < 0) | |
| 1553 { | |
| 1554 QUIT; | |
| 1555 | |
| 1556 stop = BUF_BEGV (buf); | |
| 1557 while (from > stop) | |
| 1558 { | |
| 460 | 1559 int comstyle = 0; /* mask for finding matching comment style */ |
| 428 | 1560 |
| 1561 from--; | |
| 826 | 1562 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 428 | 1563 quoted = char_quoted (buf, from); |
| 1564 if (quoted) | |
| 460 | 1565 { |
| 428 | 1566 from--; |
| 826 | 1567 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 460 | 1568 } |
| 428 | 1569 |
| 1570 c = BUF_FETCH_CHAR (buf, from); | |
| 826 | 1571 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1572 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1573 |
| 1574 if (code == Sendcomment && parse_sexp_ignore_comments) | |
| 1575 { | |
| 1576 /* we have found a single char end comment. we must record | |
| 1577 the comment style encountered so that later, we can match | |
| 1578 only the proper comment begin sequence of the same style */ | |
| 460 | 1579 comstyle = SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) |
| 1580 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1581 } |
| 1582 | |
| 1583 else if (from > stop | |
| 460 | 1584 && SYNTAX_CODE_END_SECOND_P (syncode) |
| 428 | 1585 && !char_quoted (buf, from - 1) |
| 1586 && parse_sexp_ignore_comments) | |
| 1587 { | |
| 460 | 1588 int prev_syncode; |
| 826 | 1589 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from - 1); |
| 1590 prev_syncode = | |
| 1591 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from - 1)); | |
| 460 | 1592 |
| 1593 if (SYNTAX_CODES_END_P (prev_syncode, syncode)) | |
| 1594 { | |
| 428 | 1595 /* we must record the comment style encountered so that |
| 1596 later, we can match only the proper comment begin | |
| 1597 sequence of the same style */ | |
| 1598 code = Sendcomment; | |
| 460 | 1599 comstyle = SYNTAX_CODES_COMMENT_MASK_END |
| 1600 (prev_syncode, syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 428 | 1601 from--; |
| 1602 } | |
| 460 | 1603 } |
| 428 | 1604 |
| 460 | 1605 if (SYNTAX_CODE_PREFIX (syncode)) |
| 428 | 1606 continue; |
| 1607 | |
| 434 | 1608 switch (quoted ? Sword : code) |
| 428 | 1609 { |
| 1610 case Sword: | |
| 1611 case Ssymbol: | |
| 1612 if (depth || !sexpflag) break; | |
| 1613 /* This word counts as a sexp; count object finished after | |
| 1614 passing it. */ | |
| 1615 while (from > stop) | |
| 1616 { | |
| 826 | 1617 UPDATE_SYNTAX_CACHE_BACKWARD (scache, from); |
| 428 | 1618 quoted = char_quoted (buf, from - 1); |
| 1619 | |
| 1620 if (quoted) | |
| 1621 from--; | |
| 1622 if (! (quoted | |
| 1623 || (syncode = | |
| 826 | 1624 SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, |
| 1625 from - 1))) | |
| 428 | 1626 == Sword |
| 1627 || syncode == Ssymbol | |
| 1628 || syncode == Squote)) | |
| 1629 goto done2; | |
| 1630 from--; | |
| 1631 } | |
| 1632 goto done2; | |
| 1633 | |
| 1634 case Smath: | |
| 1635 if (!sexpflag) | |
| 1636 break; | |
| 1637 if (from != stop && c == BUF_FETCH_CHAR (buf, from - 1)) | |
| 1638 from--; | |
| 1639 if (mathexit) | |
| 1640 { | |
| 1641 mathexit = 0; | |
| 1642 goto open2; | |
| 1643 } | |
| 1644 mathexit = 1; | |
| 1645 | |
| 1646 case Sclose: | |
| 1647 if (!++depth) goto done2; | |
| 1648 break; | |
| 1649 | |
| 1650 case Sopen: | |
| 1651 open2: | |
| 1652 if (!--depth) goto done2; | |
| 1653 if (depth < min_depth) | |
| 1654 { | |
| 444 | 1655 if (noerror) |
| 428 | 1656 return Qnil; |
| 826 | 1657 syntax_error ("Containing expression ends prematurely", |
| 1658 Qunbound); | |
| 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) |
| 826 | 1728 syntax_error ("Unbalanced parentheses", Qunbound); |
| 428 | 1729 return Qnil; |
| 1730 } | |
| 1731 | |
| 1732 int | |
| 665 | 1733 char_quoted (struct buffer *buf, Charbpos pos) |
| 428 | 1734 { |
| 1735 enum syntaxcode code; | |
| 665 | 1736 Charbpos beg = BUF_BEGV (buf); |
| 428 | 1737 int quoted = 0; |
| 665 | 1738 Charbpos startpos = pos; |
| 826 | 1739 struct syntax_cache *scache = buf->syntax_cache; |
| 460 | 1740 |
| 1741 while (pos > beg) | |
| 1742 { | |
| 826 | 1743 UPDATE_SYNTAX_CACHE_BACKWARD (scache, pos - 1); |
| 1744 code = SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, pos - 1)); | |
| 428 | 1745 |
| 460 | 1746 if (code != Scharquote && code != Sescape) |
| 1747 break; | |
| 1748 pos--; | |
| 1749 quoted = !quoted; | |
| 1750 } | |
| 1751 | |
| 826 | 1752 UPDATE_SYNTAX_CACHE (scache, startpos); |
| 428 | 1753 return quoted; |
| 1754 } | |
| 1755 | |
| 1756 DEFUN ("scan-lists", Fscan_lists, 3, 5, 0, /* | |
| 1757 Scan from character number FROM by COUNT lists. | |
| 1758 Returns the character number of the position thus found. | |
| 1759 | |
| 1760 If DEPTH is nonzero, paren depth begins counting from that value, | |
| 1761 only places where the depth in parentheses becomes zero | |
| 1762 are candidates for stopping; COUNT such places are counted. | |
| 1763 Thus, a positive value for DEPTH means go out levels. | |
| 1764 | |
| 1765 Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
| 1766 | |
| 1767 If the beginning or end of (the accessible part of) the buffer is reached | |
| 1768 and the depth is wrong, an error is signaled. | |
| 1769 If the depth is right but the count is not used up, nil is returned. | |
| 1770 | |
| 1771 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead | |
| 1772 of in the current buffer. | |
| 1773 | |
| 1774 If optional arg NOERROR is non-nil, scan-lists will return nil instead of | |
| 1775 signalling an error. | |
| 1776 */ | |
| 444 | 1777 (from, count, depth, buffer, noerror)) |
| 428 | 1778 { |
| 1779 struct buffer *buf; | |
| 1780 | |
| 1781 CHECK_INT (from); | |
| 1782 CHECK_INT (count); | |
| 1783 CHECK_INT (depth); | |
| 1784 buf = decode_buffer (buffer, 0); | |
| 1785 | |
| 1786 return scan_lists (buf, XINT (from), XINT (count), XINT (depth), 0, | |
| 444 | 1787 !NILP (noerror)); |
| 428 | 1788 } |
| 1789 | |
| 1790 DEFUN ("scan-sexps", Fscan_sexps, 2, 4, 0, /* | |
| 1791 Scan from character number FROM by COUNT balanced expressions. | |
| 1792 If COUNT is negative, scan backwards. | |
| 1793 Returns the character number of the position thus found. | |
| 1794 | |
| 1795 Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
| 1796 | |
| 1797 If the beginning or end of (the accessible part of) the buffer is reached | |
| 1798 in the middle of a parenthetical grouping, an error is signaled. | |
| 1799 If the beginning or end is reached between groupings | |
| 1800 but before count is used up, nil is returned. | |
| 1801 | |
| 1802 If optional arg BUFFER is non-nil, scanning occurs in that buffer instead | |
| 1803 of in the current buffer. | |
| 1804 | |
| 1805 If optional arg NOERROR is non-nil, scan-sexps will return nil instead of | |
| 1806 signalling an error. | |
| 1807 */ | |
| 444 | 1808 (from, count, buffer, noerror)) |
| 428 | 1809 { |
| 1810 struct buffer *buf = decode_buffer (buffer, 0); | |
| 1811 CHECK_INT (from); | |
| 1812 CHECK_INT (count); | |
| 1813 | |
| 444 | 1814 return scan_lists (buf, XINT (from), XINT (count), 0, 1, !NILP (noerror)); |
| 428 | 1815 } |
| 1816 | |
| 1817 DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, 0, 1, 0, /* | |
| 1818 Move point backward over any number of chars with prefix syntax. | |
| 1819 This includes chars with "quote" or "prefix" syntax (' or p). | |
| 1820 | |
| 1821 Optional arg BUFFER defaults to the current buffer. | |
| 1822 */ | |
| 1823 (buffer)) | |
| 1824 { | |
| 1825 struct buffer *buf = decode_buffer (buffer, 0); | |
| 665 | 1826 Charbpos beg = BUF_BEGV (buf); |
| 1827 Charbpos pos = BUF_PT (buf); | |
| 867 | 1828 Ichar c = '\0'; /* initialize to avoid compiler warnings */ |
| 826 | 1829 struct syntax_cache *scache; |
| 1830 | |
| 1831 scache = setup_buffer_syntax_cache (buf, pos, -1); | |
| 428 | 1832 |
| 1833 while (pos > beg && !char_quoted (buf, pos - 1) | |
| 460 | 1834 /* Previous statement updates syntax table. */ |
| 826 | 1835 && (SYNTAX_FROM_CACHE (scache, c = BUF_FETCH_CHAR (buf, pos - 1)) == Squote |
| 1836 || SYNTAX_CODE_PREFIX (SYNTAX_CODE_FROM_CACHE (scache, c)))) | |
| 428 | 1837 pos--; |
| 1838 | |
| 1839 BUF_SET_PT (buf, pos); | |
| 1840 | |
| 1841 return Qnil; | |
| 1842 } | |
| 1843 | |
| 1844 /* Parse forward from FROM to END, | |
| 1845 assuming that FROM has state OLDSTATE (nil means FROM is start of function), | |
| 1846 and return a description of the state of the parse at END. | |
| 1847 If STOPBEFORE is nonzero, stop at the start of an atom. | |
| 1848 If COMMENTSTOP is nonzero, stop at the start of a comment. */ | |
| 1849 | |
| 1850 static void | |
| 1851 scan_sexps_forward (struct buffer *buf, struct lisp_parse_state *stateptr, | |
| 665 | 1852 Charbpos from, Charbpos end, |
| 428 | 1853 int targetdepth, int stopbefore, |
| 1854 Lisp_Object oldstate, | |
| 1855 int commentstop) | |
| 1856 { | |
| 1857 struct lisp_parse_state state; | |
| 1858 | |
| 1859 enum syntaxcode code; | |
| 1860 struct level { int last, prev; }; | |
| 1861 struct level levelstart[100]; | |
| 1862 struct level *curlevel = levelstart; | |
| 1863 struct level *endlevel = levelstart + 100; | |
| 1864 int depth; /* Paren depth of current scanning location. | |
| 1865 level - levelstart equals this except | |
| 1866 when the depth becomes negative. */ | |
| 1867 int mindepth; /* Lowest DEPTH value seen. */ | |
| 1868 int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
| 460 | 1869 int boundary_stop = commentstop == -1; |
| 428 | 1870 Lisp_Object tem; |
| 826 | 1871 struct syntax_cache *scache; |
| 1872 | |
| 1873 scache = setup_buffer_syntax_cache (buf, from, 1); | |
| 428 | 1874 if (NILP (oldstate)) |
| 1875 { | |
| 1876 depth = 0; | |
| 1877 state.instring = -1; | |
| 1878 state.incomment = 0; | |
| 1879 state.comstyle = 0; /* comment style a by default */ | |
| 460 | 1880 state.comstr_start = -1; /* no comment/string seen. */ |
| 428 | 1881 } |
| 1882 else | |
| 1883 { | |
| 1884 tem = Fcar (oldstate); /* elt 0, depth */ | |
| 1885 if (!NILP (tem)) | |
| 1886 depth = XINT (tem); | |
| 1887 else | |
| 1888 depth = 0; | |
| 1889 | |
| 1890 oldstate = Fcdr (oldstate); | |
| 1891 oldstate = Fcdr (oldstate); | |
| 1892 oldstate = Fcdr (oldstate); | |
| 1893 tem = Fcar (oldstate); /* elt 3, instring */ | |
| 460 | 1894 state.instring = ( !NILP (tem) |
| 1895 ? ( INTP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
| 1896 : -1); | |
| 428 | 1897 |
| 460 | 1898 oldstate = Fcdr (oldstate); |
| 1899 tem = Fcar (oldstate); /* elt 4, incomment */ | |
| 428 | 1900 state.incomment = !NILP (tem); |
| 1901 | |
| 1902 oldstate = Fcdr (oldstate); | |
| 1903 tem = Fcar (oldstate); /* elt 5, follows-quote */ | |
| 1904 start_quoted = !NILP (tem); | |
| 1905 | |
| 1906 /* if the eighth element of the list is nil, we are in comment style | |
| 3025 | 1907 a; if it is t, we are in comment style b; if it is `syntax-table', |
| 460 | 1908 we are in a generic comment */ |
| 428 | 1909 oldstate = Fcdr (oldstate); |
| 1910 oldstate = Fcdr (oldstate); | |
| 460 | 1911 tem = Fcar (oldstate); /* elt 7, comment style a/b/fence */ |
| 1912 state.comstyle = NILP (tem) ? 0 : ( EQ (tem, Qsyntax_table) | |
| 1913 ? ST_COMMENT_STYLE : 1 ); | |
| 1914 | |
| 1915 oldstate = Fcdr (oldstate); /* elt 8, start of last comment/string */ | |
| 1916 tem = Fcar (oldstate); | |
| 1917 state.comstr_start = NILP (tem) ? -1 : XINT (tem); | |
| 1918 | |
| 1919 /* elt 9, char numbers of starts-of-expression of levels | |
| 1920 (starting from outermost). */ | |
| 1921 oldstate = Fcdr (oldstate); | |
| 1922 tem = Fcar (oldstate); /* elt 9, intermediate data for | |
| 1923 continuation of parsing (subject | |
| 1924 to change). */ | |
| 1925 while (!NILP (tem)) /* >= second enclosing sexps. */ | |
| 1926 { | |
| 1927 curlevel->last = XINT (Fcar (tem)); | |
| 1928 if (++curlevel == endlevel) | |
| 826 | 1929 stack_overflow ("Nesting too deep for parser", |
| 1930 make_int (curlevel - levelstart)); | |
| 460 | 1931 curlevel->prev = -1; |
| 1932 curlevel->last = -1; | |
| 1933 tem = Fcdr (tem); | |
| 1934 } | |
| 428 | 1935 } |
| 1936 state.quoted = 0; | |
| 1937 mindepth = depth; | |
| 1938 | |
| 1939 curlevel->prev = -1; | |
| 1940 curlevel->last = -1; | |
| 1941 | |
| 1942 /* Enter the loop at a place appropriate for initial state. */ | |
| 1943 | |
| 1944 if (state.incomment) goto startincomment; | |
| 1945 if (state.instring >= 0) | |
| 1946 { | |
| 1947 if (start_quoted) goto startquotedinstring; | |
| 1948 goto startinstring; | |
| 1949 } | |
| 1950 if (start_quoted) goto startquoted; | |
| 1951 | |
| 1952 while (from < end) | |
| 1953 { | |
| 867 | 1954 Ichar c; |
| 460 | 1955 int syncode; |
| 1956 | |
| 428 | 1957 QUIT; |
| 1958 | |
| 826 | 1959 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1960 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 1961 syncode = SYNTAX_CODE_FROM_CACHE (scache, c); |
| 1962 code = SYNTAX_FROM_CODE (syncode); | |
| 428 | 1963 from++; |
| 1964 | |
| 1965 /* record the comment style we have entered so that only the | |
| 1966 comment-ender sequence (or single char) of the same style | |
| 1967 actually terminates the comment section. */ | |
| 460 | 1968 if (code == Scomment) |
| 1969 { | |
| 1970 state.comstyle = | |
| 1971 SYNTAX_CODE_COMMENT_1CHAR_MASK (syncode) | |
| 1972 == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1973 state.comstr_start = from - 1; | |
| 1974 } | |
| 1975 | |
| 1976 /* a generic comment delimiter? */ | |
| 1977 else if (code == Scomment_fence) | |
| 1978 { | |
| 1979 state.comstyle = ST_COMMENT_STYLE; | |
| 1980 state.comstr_start = from - 1; | |
| 1981 code = Scomment; | |
| 428 | 1982 } |
| 1983 | |
| 1984 else if (from < end && | |
| 460 | 1985 SYNTAX_CODE_START_FIRST_P (syncode)) |
| 428 | 1986 { |
| 460 | 1987 int next_syncode; |
| 826 | 1988 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 1989 next_syncode = |
| 826 | 1990 SYNTAX_CODE_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from)); |
| 460 | 1991 |
| 1992 if (SYNTAX_CODES_START_P (syncode, next_syncode)) | |
| 1993 { | |
| 428 | 1994 code = Scomment; |
| 460 | 1995 state.comstyle = SYNTAX_CODES_COMMENT_MASK_START |
| 1996 (syncode, next_syncode) == SYNTAX_COMMENT_STYLE_A ? 0 : 1; | |
| 1997 state.comstr_start = from - 1; | |
| 428 | 1998 from++; |
| 826 | 1999 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 2000 } |
| 428 | 2001 } |
| 2002 | |
| 460 | 2003 if (SYNTAX_CODE_PREFIX (syncode)) |
| 428 | 2004 continue; |
| 2005 switch (code) | |
| 2006 { | |
| 2007 case Sescape: | |
| 2008 case Scharquote: | |
| 2009 if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
| 2010 curlevel->last = from - 1; | |
| 2011 startquoted: | |
| 2012 if (from == end) goto endquoted; | |
| 2013 from++; | |
| 2014 goto symstarted; | |
| 2015 /* treat following character as a word constituent */ | |
| 2016 case Sword: | |
| 2017 case Ssymbol: | |
| 2018 if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
| 2019 curlevel->last = from - 1; | |
| 2020 symstarted: | |
| 2021 while (from < end) | |
| 2022 { | |
| 826 | 2023 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 2024 switch (SYNTAX_FROM_CACHE (scache, BUF_FETCH_CHAR (buf, from))) | |
| 428 | 2025 { |
| 2026 case Scharquote: | |
| 2027 case Sescape: | |
| 2028 from++; | |
| 2029 if (from == end) goto endquoted; | |
| 2030 break; | |
| 2031 case Sword: | |
| 2032 case Ssymbol: | |
| 2033 case Squote: | |
| 2034 break; | |
| 2035 default: | |
| 2036 goto symdone; | |
| 2037 } | |
| 2038 from++; | |
| 2039 } | |
| 2040 symdone: | |
| 2041 curlevel->prev = curlevel->last; | |
| 2042 break; | |
| 2043 | |
| 2044 case Scomment: | |
| 2045 state.incomment = 1; | |
| 460 | 2046 if (commentstop || boundary_stop) goto done; |
| 428 | 2047 startincomment: |
| 460 | 2048 if (commentstop == 1) |
| 428 | 2049 goto done; |
| 826 | 2050 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 428 | 2051 { |
| 826 | 2052 Charbpos newfrom = find_end_of_comment (buf, from, end, |
| 2053 state.comstyle); | |
| 428 | 2054 if (newfrom < 0) |
| 2055 { | |
| 2056 /* we terminated search because from == end */ | |
| 2057 from = end; | |
| 2058 goto done; | |
| 2059 } | |
| 2060 from = newfrom; | |
| 2061 } | |
| 2062 state.incomment = 0; | |
| 2063 state.comstyle = 0; /* reset the comment style */ | |
| 460 | 2064 if (boundary_stop) goto done; |
| 428 | 2065 break; |
| 2066 | |
| 2067 case Sopen: | |
| 2068 if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
| 2069 depth++; | |
| 2070 curlevel->last = from - 1; | |
| 2071 if (++curlevel == endlevel) | |
| 826 | 2072 stack_overflow ("Nesting too deep for parser", |
| 2073 make_int (curlevel - levelstart)); | |
| 428 | 2074 curlevel->prev = -1; |
| 2075 curlevel->last = -1; | |
| 2076 if (targetdepth == depth) goto done; | |
| 2077 break; | |
| 2078 | |
| 2079 case Sclose: | |
| 2080 depth--; | |
| 2081 if (depth < mindepth) | |
| 2082 mindepth = depth; | |
| 2083 if (curlevel != levelstart) | |
| 2084 curlevel--; | |
| 2085 curlevel->prev = curlevel->last; | |
| 2086 if (targetdepth == depth) goto done; | |
| 2087 break; | |
| 2088 | |
| 2089 case Sstring: | |
| 460 | 2090 case Sstring_fence: |
| 2091 state.comstr_start = from - 1; | |
| 428 | 2092 if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
| 2093 curlevel->last = from - 1; | |
| 460 | 2094 if (code == Sstring_fence) |
| 428 | 2095 { |
| 460 | 2096 state.instring = ST_STRING_STYLE; |
| 2097 } | |
| 2098 else | |
| 2099 { | |
| 2100 /* XEmacs change: call syntax_match() on character */ | |
| 867 | 2101 Ichar ch = BUF_FETCH_CHAR (buf, from - 1); |
| 460 | 2102 Lisp_Object stermobj = |
| 1296 | 2103 syntax_match (scache->syntax_table, ch); |
| 428 | 2104 |
| 2105 if (CHARP (stermobj)) | |
| 2106 state.instring = XCHAR (stermobj); | |
| 2107 else | |
| 2108 state.instring = ch; | |
| 2109 } | |
| 460 | 2110 if (boundary_stop) goto done; |
| 428 | 2111 startinstring: |
| 2112 while (1) | |
| 2113 { | |
| 460 | 2114 enum syntaxcode temp_code; |
| 2115 | |
| 428 | 2116 if (from >= end) goto done; |
| 460 | 2117 |
| 826 | 2118 UPDATE_SYNTAX_CACHE_FORWARD (scache, from); |
| 460 | 2119 c = BUF_FETCH_CHAR (buf, from); |
| 826 | 2120 temp_code = SYNTAX_FROM_CACHE (scache, c); |
| 460 | 2121 |
| 2122 if ( | |
| 2123 state.instring != ST_STRING_STYLE && | |
| 2124 temp_code == Sstring && | |
| 2125 c == state.instring) break; | |
| 2126 | |
| 2127 switch (temp_code) | |
| 428 | 2128 { |
| 460 | 2129 case Sstring_fence: |
| 2130 if (state.instring == ST_STRING_STYLE) | |
| 2131 goto string_end; | |
| 2132 break; | |
| 428 | 2133 case Scharquote: |
| 2134 case Sescape: | |
| 2135 { | |
| 2136 from++; | |
| 2137 startquotedinstring: | |
| 2138 if (from >= end) goto endquoted; | |
| 2139 break; | |
| 2140 } | |
| 2141 default: | |
| 2142 break; | |
| 2143 } | |
| 2144 from++; | |
| 2145 } | |
| 460 | 2146 string_end: |
| 428 | 2147 state.instring = -1; |
| 2148 curlevel->prev = curlevel->last; | |
| 2149 from++; | |
| 460 | 2150 if (boundary_stop) goto done; |
| 428 | 2151 break; |
| 2152 | |
| 2153 case Smath: | |
| 2154 break; | |
| 2155 | |
| 2156 case Swhitespace: | |
| 2157 case Spunct: | |
| 2158 case Squote: | |
| 2159 case Sendcomment: | |
| 460 | 2160 case Scomment_fence: |
| 428 | 2161 case Sinherit: |
| 2162 case Smax: | |
| 2163 break; | |
| 2164 } | |
| 2165 } | |
| 2166 goto done; | |
| 2167 | |
| 2168 stop: /* Here if stopping before start of sexp. */ | |
| 2169 from--; /* We have just fetched the char that starts it; */ | |
| 2170 goto done; /* but return the position before it. */ | |
| 2171 | |
| 2172 endquoted: | |
| 2173 state.quoted = 1; | |
| 2174 done: | |
| 2175 state.depth = depth; | |
| 2176 state.mindepth = mindepth; | |
| 2177 state.thislevelstart = curlevel->prev; | |
| 2178 state.prevlevelstart | |
| 2179 = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
| 2180 state.location = from; | |
| 460 | 2181 state.levelstarts = Qnil; |
| 2182 while (--curlevel >= levelstart) | |
| 2183 state.levelstarts = Fcons (make_int (curlevel->last), | |
| 2184 state.levelstarts); | |
| 428 | 2185 |
| 2186 *stateptr = state; | |
| 2187 } | |
| 2188 | |
| 2189 DEFUN ("parse-partial-sexp", Fparse_partial_sexp, 2, 7, 0, /* | |
| 2190 Parse Lisp syntax starting at FROM until TO; return status of parse at TO. | |
| 2191 Parsing stops at TO or when certain criteria are met; | |
| 2192 point is set to where parsing stops. | |
| 444 | 2193 If fifth arg OLDSTATE is omitted or nil, |
| 428 | 2194 parsing assumes that FROM is the beginning of a function. |
| 460 | 2195 Value is a list of nine elements describing final state of parsing: |
| 428 | 2196 0. depth in parens. |
| 2197 1. character address of start of innermost containing list; nil if none. | |
| 2198 2. character address of start of last complete sexp terminated. | |
| 2199 3. non-nil if inside a string. | |
| 460 | 2200 (It is the character that will terminate the string, |
| 2201 or t if the string should be terminated by an explicit | |
| 2202 `syntax-table' property.) | |
| 428 | 2203 4. t if inside a comment. |
| 2204 5. t if following a quote character. | |
| 2205 6. the minimum paren-depth encountered during this scan. | |
| 460 | 2206 7. nil if in comment style a, or not in a comment; t if in comment style b; |
| 2207 `syntax-table' if given by an explicit `syntax-table' property. | |
| 2208 8. character address of start of last comment or string; nil if none. | |
| 2209 9. Intermediate data for continuation of parsing (subject to change). | |
| 428 | 2210 If third arg TARGETDEPTH is non-nil, parsing stops if the depth |
| 2211 in parentheses becomes equal to TARGETDEPTH. | |
| 2212 Fourth arg STOPBEFORE non-nil means stop when come to | |
| 2213 any character that starts a sexp. | |
| 460 | 2214 Fifth arg OLDSTATE is a nine-element list like what this function returns. |
| 428 | 2215 It is used to initialize the state of the parse. Its second and third |
| 2216 elements are ignored. | |
| 460 | 2217 Sixth arg COMMENTSTOP non-nil means stop at the start of a comment. If it |
| 2218 is `syntax-table', stop after the start of a comment or a string, or after | |
| 2219 the end of a comment or string. | |
| 826 | 2220 Seventh arg BUFFER specifies the buffer to do the parsing in, and defaults |
| 2221 to the current buffer. | |
| 428 | 2222 */ |
| 2223 (from, to, targetdepth, stopbefore, oldstate, commentstop, buffer)) | |
| 2224 { | |
| 2225 struct lisp_parse_state state; | |
| 2226 int target; | |
| 665 | 2227 Charbpos start, end; |
| 428 | 2228 struct buffer *buf = decode_buffer (buffer, 0); |
| 2229 Lisp_Object val; | |
| 2230 | |
| 2231 if (!NILP (targetdepth)) | |
| 2232 { | |
| 2233 CHECK_INT (targetdepth); | |
| 2234 target = XINT (targetdepth); | |
| 2235 } | |
| 2236 else | |
| 2237 target = -100000; /* We won't reach this depth */ | |
| 2238 | |
| 2239 get_buffer_range_char (buf, from, to, &start, &end, 0); | |
| 2240 scan_sexps_forward (buf, &state, start, end, | |
| 2241 target, !NILP (stopbefore), oldstate, | |
| 460 | 2242 (NILP (commentstop) |
| 2243 ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); | |
| 428 | 2244 BUF_SET_PT (buf, state.location); |
| 2245 | |
| 2246 /* reverse order */ | |
| 2247 val = Qnil; | |
| 460 | 2248 val = Fcons (state.levelstarts, val); |
| 2249 val = Fcons ((state.incomment || (state.instring >= 0)) | |
| 2250 ? make_int (state.comstr_start) : Qnil, val); | |
| 2251 val = Fcons (state.comstyle ? (state.comstyle == ST_COMMENT_STYLE | |
| 2252 ? Qsyntax_table : Qt) : Qnil, val); | |
| 428 | 2253 val = Fcons (make_int (state.mindepth), val); |
| 2254 val = Fcons (state.quoted ? Qt : Qnil, val); | |
| 2255 val = Fcons (state.incomment ? Qt : Qnil, val); | |
| 460 | 2256 val = Fcons (state.instring < 0 |
| 2257 ? Qnil | |
| 2258 : (state.instring == ST_STRING_STYLE | |
| 2259 ? Qt : make_int (state.instring)), val); | |
| 826 | 2260 val = Fcons (state.thislevelstart < 0 ? Qnil : |
| 2261 make_int (state.thislevelstart), val); | |
| 2262 val = Fcons (state.prevlevelstart < 0 ? Qnil : | |
| 2263 make_int (state.prevlevelstart), val); | |
| 428 | 2264 val = Fcons (make_int (state.depth), val); |
| 2265 | |
| 2266 return val; | |
| 2267 } | |
| 2268 | |
| 2269 | |
| 2270 /* Updating of the mirror syntax table. | |
| 2271 | |
| 1296 | 2272 Each syntax table has a corresponding mirror table in it. Whenever we |
| 2273 make a change to a syntax table, we set a dirty flag. When accessing a | |
| 2274 value from the mirror table and the table is dirty, we call | |
| 2275 update_syntax_table() to clean it up. | |
| 428 | 2276 |
| 2277 #### We really only need to map over the changed range. | |
| 2278 | |
| 2279 If we change the standard syntax table, we need to map over | |
| 2280 all tables because any of them could be inheriting from the | |
| 2281 standard syntax table. | |
| 2282 | |
| 2283 When `set-syntax-table' is called, we set the buffer's mirror | |
| 2284 syntax table as well. | |
| 2285 */ | |
| 2286 | |
| 826 | 2287 static int |
| 2286 | 2288 copy_to_mirrortab (struct chartab_range *range, Lisp_Object UNUSED (table), |
| 826 | 2289 Lisp_Object val, void *arg) |
| 428 | 2290 { |
| 826 | 2291 Lisp_Object mirrortab = VOID_TO_LISP (arg); |
| 428 | 2292 |
| 2293 if (CONSP (val)) | |
| 2294 val = XCAR (val); | |
| 826 | 2295 if (SYNTAX_FROM_CODE (XINT (val)) != Sinherit) |
| 2296 put_char_table (mirrortab, range, val); | |
| 2297 return 0; | |
| 2298 } | |
| 2299 | |
| 2300 static int | |
| 2286 | 2301 copy_if_not_already_present (struct chartab_range *range, |
| 2302 Lisp_Object UNUSED (table), | |
| 826 | 2303 Lisp_Object val, void *arg) |
| 2304 { | |
| 1296 | 2305 Lisp_Object mirrortab = VOID_TO_LISP (arg); |
| 826 | 2306 if (CONSP (val)) |
| 2307 val = XCAR (val); | |
| 2308 if (SYNTAX_FROM_CODE (XINT (val)) != Sinherit) | |
| 2309 { | |
| 2310 Lisp_Object existing = | |
| 1296 | 2311 updating_mirror_get_range_char_table (range, mirrortab, |
| 2312 Vbogus_syntax_table_value); | |
| 826 | 2313 if (NILP (existing)) |
| 2314 /* nothing at all */ | |
| 1296 | 2315 put_char_table (mirrortab, range, val); |
| 2316 else if (!EQ (existing, Vbogus_syntax_table_value)) | |
| 826 | 2317 /* full */ |
| 2318 ; | |
| 2319 else | |
| 2320 { | |
| 2321 Freset_char_table (Vtemp_table_for_use_updating_syntax_tables); | |
| 2322 copy_char_table_range | |
| 1296 | 2323 (mirrortab, Vtemp_table_for_use_updating_syntax_tables, range); |
| 2324 put_char_table (mirrortab, range, val); | |
| 826 | 2325 copy_char_table_range |
| 1296 | 2326 (Vtemp_table_for_use_updating_syntax_tables, mirrortab, range); |
| 826 | 2327 } |
| 428 | 2328 } |
| 826 | 2329 |
| 428 | 2330 return 0; |
| 2331 } | |
| 2332 | |
| 2333 static void | |
| 826 | 2334 update_just_this_syntax_table (Lisp_Object table) |
| 428 | 2335 { |
| 2336 struct chartab_range range; | |
| 826 | 2337 Lisp_Object mirrortab = XCHAR_TABLE (table)->mirror_table; |
| 2338 | |
| 1296 | 2339 assert (!XCHAR_TABLE (table)->mirror_table_p); |
| 826 | 2340 range.type = CHARTAB_RANGE_ALL; |
| 2341 Freset_char_table (mirrortab); | |
| 1296 | 2342 |
| 826 | 2343 /* First, copy the tables values other than inherit into the mirror |
| 2344 table. Then, for tables other than the standard syntax table, map | |
| 2345 over the standard table, copying values into the mirror table only if | |
| 2346 entries don't already exist in that table. (The copying step requires | |
| 2347 another mapping.) | |
| 2348 */ | |
| 428 | 2349 |
| 826 | 2350 map_char_table (table, &range, copy_to_mirrortab, LISP_TO_VOID (mirrortab)); |
| 2351 /* second clause catches bootstrapping problems when initializing the | |
| 2352 standard syntax table */ | |
| 2353 if (!EQ (table, Vstandard_syntax_table) && !NILP (Vstandard_syntax_table)) | |
| 1296 | 2354 map_char_table (Vstandard_syntax_table, &range, |
| 2355 copy_if_not_already_present, LISP_TO_VOID (mirrortab)); | |
| 3152 | 2356 /* The resetting made the default be Qnil. Put it back to Sword. */ |
| 2357 set_char_table_default (mirrortab, make_int (Sword)); | |
| 1296 | 2358 XCHAR_TABLE (mirrortab)->dirty = 0; |
| 428 | 2359 } |
| 2360 | |
| 2361 /* Called from chartab.c when a change is made to a syntax table. | |
| 2362 If this is the standard syntax table, we need to recompute | |
| 2363 *all* syntax tables (yuck). Otherwise we just recompute this | |
| 2364 one. */ | |
| 2365 | |
| 2366 void | |
| 826 | 2367 update_syntax_table (Lisp_Object table) |
| 428 | 2368 { |
| 1296 | 2369 Lisp_Object nonmirror = XCHAR_TABLE (table)->mirror_table; |
| 2370 assert (XCHAR_TABLE (table)->mirror_table_p); | |
| 2371 if (EQ (nonmirror, Vstandard_syntax_table)) | |
| 428 | 2372 { |
| 2373 Lisp_Object syntab; | |
| 2374 | |
| 2375 for (syntab = Vall_syntax_tables; !NILP (syntab); | |
| 2376 syntab = XCHAR_TABLE (syntab)->next_table) | |
| 826 | 2377 update_just_this_syntax_table (syntab); |
| 428 | 2378 } |
| 2379 else | |
| 1296 | 2380 update_just_this_syntax_table (nonmirror); |
| 428 | 2381 } |
| 2382 | |
| 2383 | |
| 2384 /************************************************************************/ | |
| 2385 /* initialization */ | |
| 2386 /************************************************************************/ | |
| 2387 | |
| 2388 void | |
| 2389 syms_of_syntax (void) | |
| 2390 { | |
| 3092 | 2391 #ifdef NEW_GC |
|
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Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
2392 INIT_LISP_OBJECT (syntax_cache); |
| 3092 | 2393 #endif /* NEW_GC */ |
| 563 | 2394 DEFSYMBOL (Qsyntax_table_p); |
| 2395 DEFSYMBOL (Qsyntax_table); | |
| 428 | 2396 |
| 2397 DEFSUBR (Fsyntax_table_p); | |
| 2398 DEFSUBR (Fsyntax_table); | |
| 826 | 2399 #ifdef DEBUG_XEMACS |
| 2400 DEFSUBR (Fmirror_syntax_table); | |
| 2401 DEFSUBR (Fsyntax_cache_info); | |
| 2402 #endif /* DEBUG_XEMACS */ | |
| 428 | 2403 DEFSUBR (Fstandard_syntax_table); |
| 2404 DEFSUBR (Fcopy_syntax_table); | |
| 2405 DEFSUBR (Fset_syntax_table); | |
| 2406 DEFSUBR (Fsyntax_designator_chars); | |
| 2407 DEFSUBR (Fchar_syntax); | |
| 2408 DEFSUBR (Fmatching_paren); | |
| 2409 /* DEFSUBR (Fmodify_syntax_entry); now in Lisp. */ | |
| 2410 /* DEFSUBR (Fdescribe_syntax); now in Lisp. */ | |
| 2411 | |
| 2412 DEFSUBR (Fforward_word); | |
| 2413 | |
| 2414 DEFSUBR (Fforward_comment); | |
| 2415 DEFSUBR (Fscan_lists); | |
| 2416 DEFSUBR (Fscan_sexps); | |
| 2417 DEFSUBR (Fbackward_prefix_chars); | |
| 2418 DEFSUBR (Fparse_partial_sexp); | |
| 2419 } | |
| 2420 | |
| 2421 void | |
| 2422 vars_of_syntax (void) | |
| 2423 { | |
| 2424 DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments /* | |
| 2425 Non-nil means `forward-sexp', etc., should treat comments as whitespace. | |
| 2426 */ ); | |
| 434 | 2427 parse_sexp_ignore_comments = 0; |
| 428 | 2428 |
| 460 | 2429 DEFVAR_BOOL ("lookup-syntax-properties", &lookup_syntax_properties /* |
| 826 | 2430 Non-nil means `forward-sexp', etc., respect the `syntax-table' property. |
| 2431 This property can be placed on buffers or strings and can be used to explicitly | |
| 2432 specify the syntax table to be used for looking up the syntax of the chars | |
| 2433 having this property, or to directly specify the syntax of the chars. | |
| 2434 | |
| 460 | 2435 The value of this property should be either a syntax table, or a cons |
| 2436 of the form (SYNTAXCODE . MATCHCHAR), SYNTAXCODE being the numeric | |
| 2437 syntax code, MATCHCHAR being nil or the character to match (which is | |
| 826 | 2438 relevant only when the syntax code is open/close-type). |
| 460 | 2439 */ ); |
| 2440 lookup_syntax_properties = 1; | |
| 2441 | |
| 428 | 2442 DEFVAR_BOOL ("words-include-escapes", &words_include_escapes /* |
| 2443 Non-nil means `forward-word', etc., should treat escape chars part of words. | |
| 2444 */ ); | |
| 434 | 2445 words_include_escapes = 0; |
| 428 | 2446 |
| 2447 no_quit_in_re_search = 0; | |
| 1296 | 2448 |
| 2449 Vbogus_syntax_table_value = make_float (0.0); | |
| 2450 staticpro (&Vbogus_syntax_table_value); | |
| 428 | 2451 } |
| 2452 | |
| 2453 static void | |
| 3540 | 2454 define_standard_syntax (const UExtbyte *p, enum syntaxcode syn) |
| 428 | 2455 { |
| 2456 for (; *p; p++) | |
| 2457 Fput_char_table (make_char (*p), make_int (syn), Vstandard_syntax_table); | |
| 2458 } | |
| 2459 | |
| 2460 void | |
| 2461 complex_vars_of_syntax (void) | |
| 2462 { | |
| 867 | 2463 Ichar i; |
| 3540 | 2464 const UExtbyte *p; /* Latin-1, not internal format. */ |
| 2465 | |
| 2466 #define SET_RANGE_SYNTAX(start, end, syntax) \ | |
| 2467 do { \ | |
| 2468 for (i = start; i <= end; i++) \ | |
| 2469 Fput_char_table(make_char(i), make_int(syntax), \ | |
| 2470 Vstandard_syntax_table); \ | |
| 2471 } while (0) | |
| 2472 | |
| 2473 /* Set this now, so first buffer creation can refer to it. | |
| 2474 | |
| 2475 Make it nil before calling copy-syntax-table so that copy-syntax-table | |
| 2476 will know not to try to copy from garbage */ | |
| 428 | 2477 Vstandard_syntax_table = Qnil; |
| 2478 Vstandard_syntax_table = Fcopy_syntax_table (Qnil); | |
| 2479 staticpro (&Vstandard_syntax_table); | |
| 2480 | |
| 826 | 2481 Vtemp_table_for_use_updating_syntax_tables = Fmake_char_table (Qgeneric); |
| 2482 staticpro (&Vtemp_table_for_use_updating_syntax_tables); | |
| 2483 | |
| 428 | 2484 Vsyntax_designator_chars_string = make_string_nocopy (syntax_code_spec, |
| 2485 Smax); | |
| 2486 staticpro (&Vsyntax_designator_chars_string); | |
| 2487 | |
| 3540 | 2488 /* Default character syntax is word. */ |
| 3152 | 2489 set_char_table_default (Vstandard_syntax_table, make_int (Sword)); |
| 428 | 2490 |
| 3540 | 2491 /* Control 0; treat as punctuation */ |
| 2492 SET_RANGE_SYNTAX(0, 32, Spunct); | |
| 428 | 2493 |
| 3544 | 2494 /* The whitespace--overwriting some of the above changes. |
| 2495 | |
| 2496 String literals are const char *s, not const unsigned char *s. */ | |
|
4653
25e5e5346d31
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4141
diff
changeset
|
2497 define_standard_syntax((const UExtbyte *)" \t\015\014\012", Swhitespace); |
| 3540 | 2498 |
| 2499 /* DEL plus Control 1 */ | |
| 2500 SET_RANGE_SYNTAX(127, 159, Spunct); | |
| 2501 | |
| 3544 | 2502 define_standard_syntax ((const UExtbyte *)"\"", Sstring); |
| 2503 define_standard_syntax ((const UExtbyte *)"\\", Sescape); | |
| 2504 define_standard_syntax ((const UExtbyte *)"_-+*/&|<>=", Ssymbol); | |
| 2505 define_standard_syntax ((const UExtbyte *)".,;:?!#@~^'`", Spunct); | |
| 428 | 2506 |
| 3544 | 2507 for (p = (const UExtbyte *)"()[]{}"; *p; p+=2) |
| 428 | 2508 { |
| 2509 Fput_char_table (make_char (p[0]), | |
| 2510 Fcons (make_int (Sopen), make_char (p[1])), | |
| 2511 Vstandard_syntax_table); | |
| 2512 Fput_char_table (make_char (p[1]), | |
| 2513 Fcons (make_int (Sclose), make_char (p[0])), | |
| 2514 Vstandard_syntax_table); | |
| 2515 } | |
| 3540 | 2516 |
| 2517 /* Latin 1 "symbols." This contrasts with the FSF, where they're word | |
| 2518 constituents. */ | |
| 2519 SET_RANGE_SYNTAX(0240, 0277, Ssymbol); | |
| 2520 | |
| 2521 /* The guillemets. These are not parentheses, in contrast to what the old | |
| 2522 code did. */ | |
| 3569 | 2523 define_standard_syntax((const UExtbyte *)"\253\273", Spunct); |
| 3540 | 2524 |
| 2525 /* The inverted exclamation mark, and the multiplication and division | |
| 2526 signs. */ | |
| 3544 | 2527 define_standard_syntax((const UExtbyte *)"\241\327\367", Spunct); |
| 3540 | 2528 |
| 2529 #undef SET_RANGE_SYNTAX | |
| 428 | 2530 } |