Commit | Line | Data |
---|---|---|
8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
ab422c4d PE |
2 | Copyright (C) 1985, 1987, 1993-1995, 1997-1999, 2001-2013 Free |
3 | Software Foundation, Inc. | |
8489eb67 RS |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
8489eb67 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
8489eb67 RS |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
8489eb67 RS |
19 | |
20 | ||
18160b98 | 21 | #include <config.h> |
1b2de274 | 22 | |
1b2de274 | 23 | #include <sys/types.h> |
0328b6de | 24 | |
8489eb67 RS |
25 | #include "lisp.h" |
26 | #include "commands.h" | |
5c7b02ab | 27 | #include "character.h" |
e5560ff7 | 28 | #include "buffer.h" |
e35f6ff7 | 29 | #include "keymap.h" |
a1bc88d4 | 30 | #include "regex.h" |
195d1361 RS |
31 | |
32 | /* Make syntax table lookup grant data in gl_state. */ | |
33 | #define SYNTAX_ENTRY_VIA_PROPERTY | |
34 | ||
8489eb67 | 35 | #include "syntax.h" |
195d1361 | 36 | #include "intervals.h" |
c5683ceb SM |
37 | #include "category.h" |
38 | ||
1fc71008 | 39 | /* Eight single-bit flags have the following meanings: |
c5683ceb SM |
40 | 1. This character is the first of a two-character comment-start sequence. |
41 | 2. This character is the second of a two-character comment-start sequence. | |
42 | 3. This character is the first of a two-character comment-end sequence. | |
43 | 4. This character is the second of a two-character comment-end sequence. | |
44 | 5. This character is a prefix, for backward-prefix-chars. | |
45 | 6. The char is part of a delimiter for comments of style "b". | |
46 | 7. This character is part of a nestable comment sequence. | |
47 | 8. The char is part of a delimiter for comments of style "c". | |
48 | Note that any two-character sequence whose first character has flag 1 | |
49 | and whose second character has flag 2 will be interpreted as a comment start. | |
50 | ||
1fc71008 | 51 | Bits 6 and 8 discriminate among different comment styles. |
c5683ceb | 52 | Languages such as C++ allow two orthogonal syntax start/end pairs |
1fc71008 | 53 | and bit 6 determines whether a comment-end or Scommentend |
c5683ceb SM |
54 | ends style a or b. Comment markers can start style a, b, c, or bc. |
55 | Style a is always the default. | |
1fc71008 | 56 | For 2-char comment markers, the style b flag is looked up only on the second |
c5683ceb | 57 | char of the comment marker and on the first char of the comment ender. |
1fc71008 PE |
58 | For style c (like the nested flag), the flag can be placed on any of |
59 | the chars. */ | |
c5683ceb | 60 | |
45b683a1 | 61 | /* These functions extract specific flags from an integer |
c5683ceb SM |
62 | that holds the syntax code and the flags. */ |
63 | ||
45b683a1 PE |
64 | static bool |
65 | SYNTAX_FLAGS_COMSTART_FIRST (int flags) | |
66 | { | |
67 | return (flags >> 16) & 1; | |
68 | } | |
69 | static bool | |
70 | SYNTAX_FLAGS_COMSTART_SECOND (int flags) | |
71 | { | |
72 | return (flags >> 17) & 1; | |
73 | } | |
74 | static bool | |
75 | SYNTAX_FLAGS_COMEND_FIRST (int flags) | |
76 | { | |
77 | return (flags >> 18) & 1; | |
78 | } | |
79 | static bool | |
80 | SYNTAX_FLAGS_COMEND_SECOND (int flags) | |
81 | { | |
82 | return (flags >> 19) & 1; | |
83 | } | |
84 | static bool | |
85 | SYNTAX_FLAGS_PREFIX (int flags) | |
86 | { | |
87 | return (flags >> 20) & 1; | |
88 | } | |
89 | static bool | |
90 | SYNTAX_FLAGS_COMMENT_STYLEB (int flags) | |
91 | { | |
92 | return (flags >> 21) & 1; | |
93 | } | |
94 | static bool | |
95 | SYNTAX_FLAGS_COMMENT_STYLEC (int flags) | |
96 | { | |
97 | return (flags >> 23) & 1; | |
98 | } | |
99 | static int | |
100 | SYNTAX_FLAGS_COMMENT_STYLEC2 (int flags) | |
101 | { | |
102 | return (flags >> 22) & 2; /* SYNTAX_FLAGS_COMMENT_STYLEC (flags) * 2 */ | |
103 | } | |
104 | static bool | |
105 | SYNTAX_FLAGS_COMMENT_NESTED (int flags) | |
106 | { | |
107 | return (flags >> 22) & 1; | |
108 | } | |
c5683ceb | 109 | |
c5683ceb SM |
110 | /* FLAGS should be the flags of the main char of the comment marker, e.g. |
111 | the second for comstart and the first for comend. */ | |
45b683a1 PE |
112 | static int |
113 | SYNTAX_FLAGS_COMMENT_STYLE (int flags, int other_flags) | |
114 | { | |
115 | return (SYNTAX_FLAGS_COMMENT_STYLEB (flags) | |
116 | | SYNTAX_FLAGS_COMMENT_STYLEC2 (flags) | |
117 | | SYNTAX_FLAGS_COMMENT_STYLEC2 (other_flags)); | |
118 | } | |
c5683ceb | 119 | |
45b683a1 | 120 | /* Extract a particular flag for a given character. */ |
c5683ceb | 121 | |
45b683a1 PE |
122 | static bool |
123 | SYNTAX_COMEND_FIRST (int c) | |
124 | { | |
125 | return SYNTAX_FLAGS_COMEND_FIRST (SYNTAX_WITH_FLAGS (c)); | |
126 | } | |
195d1361 RS |
127 | |
128 | /* We use these constants in place for comment-style and | |
45b683a1 | 129 | string-ender-char to distinguish comments/strings started by |
195d1361 RS |
130 | comment_fence and string_fence codes. */ |
131 | ||
45b683a1 PE |
132 | enum |
133 | { | |
134 | ST_COMMENT_STYLE = 256 + 1, | |
135 | ST_STRING_STYLE = 256 + 2 | |
136 | }; | |
8489eb67 | 137 | |
955cbe7b PE |
138 | static Lisp_Object Qsyntax_table_p; |
139 | static Lisp_Object Qsyntax_table, Qscan_error; | |
8489eb67 | 140 | |
e5d4f4dc RS |
141 | /* This is the internal form of the parse state used in parse-partial-sexp. */ |
142 | ||
143 | struct lisp_parse_state | |
144 | { | |
d311d28c | 145 | EMACS_INT depth; /* Depth at end of parsing. */ |
6449674e | 146 | int instring; /* -1 if not within string, else desired terminator. */ |
d311d28c | 147 | EMACS_INT incomment; /* -1 if in unnestable comment else comment nesting */ |
6449674e | 148 | int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */ |
1fc71008 | 149 | bool quoted; /* True if just after an escape char at end of parsing. */ |
d311d28c | 150 | EMACS_INT mindepth; /* Minimum depth seen while scanning. */ |
6449674e | 151 | /* Char number of most recent start-of-expression at current level */ |
d311d28c | 152 | ptrdiff_t thislevelstart; |
6449674e | 153 | /* Char number of start of containing expression */ |
d311d28c PE |
154 | ptrdiff_t prevlevelstart; |
155 | ptrdiff_t location; /* Char number at which parsing stopped. */ | |
8ca30920 | 156 | ptrdiff_t location_byte; /* Corresponding byte position. */ |
d311d28c | 157 | ptrdiff_t comstr_start; /* Position of last comment/string starter. */ |
6449674e SM |
158 | Lisp_Object levelstarts; /* Char numbers of starts-of-expression |
159 | of levels (starting from outermost). */ | |
e5d4f4dc RS |
160 | }; |
161 | \f | |
37bef230 RS |
162 | /* These variables are a cache for finding the start of a defun. |
163 | find_start_pos is the place for which the defun start was found. | |
164 | find_start_value is the defun start position found for it. | |
6a140a74 | 165 | find_start_value_byte is the corresponding byte position. |
37bef230 RS |
166 | find_start_buffer is the buffer it was found in. |
167 | find_start_begv is the BEGV value when it was found. | |
168 | find_start_modiff is the value of MODIFF when it was found. */ | |
169 | ||
d311d28c PE |
170 | static ptrdiff_t find_start_pos; |
171 | static ptrdiff_t find_start_value; | |
172 | static ptrdiff_t find_start_value_byte; | |
37bef230 | 173 | static struct buffer *find_start_buffer; |
d311d28c PE |
174 | static ptrdiff_t find_start_begv; |
175 | static EMACS_INT find_start_modiff; | |
6a140a74 RS |
176 | |
177 | ||
1fc71008 PE |
178 | static Lisp_Object skip_chars (bool, Lisp_Object, Lisp_Object, bool); |
179 | static Lisp_Object skip_syntaxes (bool, Lisp_Object, Lisp_Object); | |
180 | static Lisp_Object scan_lists (EMACS_INT, EMACS_INT, EMACS_INT, bool); | |
f57e2426 | 181 | static void scan_sexps_forward (struct lisp_parse_state *, |
d311d28c | 182 | ptrdiff_t, ptrdiff_t, ptrdiff_t, EMACS_INT, |
1fc71008 PE |
183 | bool, Lisp_Object, int); |
184 | static bool in_classes (int, Lisp_Object); | |
39eb03f1 PE |
185 | |
186 | /* This setter is used only in this file, so it can be private. */ | |
b0ab8123 | 187 | static void |
39eb03f1 PE |
188 | bset_syntax_table (struct buffer *b, Lisp_Object val) |
189 | { | |
190 | b->INTERNAL_FIELD (syntax_table) = val; | |
191 | } | |
195d1361 | 192 | \f |
c5683ceb | 193 | /* Whether the syntax of the character C has the prefix flag set. */ |
1fc71008 PE |
194 | bool |
195 | syntax_prefix_flag_p (int c) | |
c5683ceb | 196 | { |
45b683a1 | 197 | return SYNTAX_FLAGS_PREFIX (SYNTAX_WITH_FLAGS (c)); |
c5683ceb | 198 | } |
195d1361 RS |
199 | |
200 | struct gl_state_s gl_state; /* Global state of syntax parser. */ | |
201 | ||
45b683a1 | 202 | enum { INTERVALS_AT_ONCE = 10 }; /* 1 + max-number of intervals |
195d1361 RS |
203 | to scan to property-change. */ |
204 | ||
45b683a1 PE |
205 | /* Set the syntax entry VAL for char C in table TABLE. */ |
206 | ||
207 | static void | |
208 | SET_RAW_SYNTAX_ENTRY (Lisp_Object table, int c, Lisp_Object val) | |
209 | { | |
210 | CHAR_TABLE_SET (table, c, val); | |
211 | } | |
212 | ||
213 | /* Set the syntax entry VAL for char-range RANGE in table TABLE. | |
214 | RANGE is a cons (FROM . TO) specifying the range of characters. */ | |
215 | ||
216 | static void | |
217 | SET_RAW_SYNTAX_ENTRY_RANGE (Lisp_Object table, Lisp_Object range, | |
218 | Lisp_Object val) | |
219 | { | |
220 | Fset_char_table_range (table, range, val); | |
221 | } | |
222 | ||
223 | /* Extract the information from the entry for character C | |
224 | in the current syntax table. */ | |
225 | ||
226 | static Lisp_Object | |
227 | SYNTAX_MATCH (int c) | |
228 | { | |
229 | Lisp_Object ent = SYNTAX_ENTRY (c); | |
230 | return CONSP (ent) ? XCDR (ent) : Qnil; | |
231 | } | |
232 | ||
233 | /* This should be called with FROM at the start of forward | |
234 | search, or after the last position of the backward search. It | |
235 | makes sure that the first char is picked up with correct table, so | |
236 | one does not need to call UPDATE_SYNTAX_TABLE immediately after the | |
237 | call. | |
238 | Sign of COUNT gives the direction of the search. | |
239 | */ | |
240 | ||
241 | static void | |
242 | SETUP_SYNTAX_TABLE (ptrdiff_t from, ptrdiff_t count) | |
243 | { | |
244 | SETUP_BUFFER_SYNTAX_TABLE (); | |
245 | gl_state.b_property = BEGV; | |
246 | gl_state.e_property = ZV + 1; | |
247 | gl_state.object = Qnil; | |
248 | gl_state.offset = 0; | |
249 | if (parse_sexp_lookup_properties) | |
250 | if (count > 0 || from > BEGV) | |
251 | update_syntax_table (count > 0 ? from : from - 1, count, 1, Qnil); | |
252 | } | |
253 | ||
254 | /* Same as above, but in OBJECT. If OBJECT is nil, use current buffer. | |
255 | If it is t (which is only used in fast_c_string_match_ignore_case), | |
256 | ignore properties altogether. | |
257 | ||
258 | This is meant for regex.c to use. For buffers, regex.c passes arguments | |
259 | to the UPDATE_SYNTAX_TABLE functions which are relative to BEGV. | |
260 | So if it is a buffer, we set the offset field to BEGV. */ | |
261 | ||
262 | void | |
263 | SETUP_SYNTAX_TABLE_FOR_OBJECT (Lisp_Object object, | |
264 | ptrdiff_t from, ptrdiff_t count) | |
265 | { | |
266 | SETUP_BUFFER_SYNTAX_TABLE (); | |
267 | gl_state.object = object; | |
268 | if (BUFFERP (gl_state.object)) | |
269 | { | |
270 | struct buffer *buf = XBUFFER (gl_state.object); | |
271 | gl_state.b_property = 1; | |
272 | gl_state.e_property = BUF_ZV (buf) - BUF_BEGV (buf) + 1; | |
273 | gl_state.offset = BUF_BEGV (buf) - 1; | |
274 | } | |
275 | else if (NILP (gl_state.object)) | |
276 | { | |
277 | gl_state.b_property = 1; | |
278 | gl_state.e_property = ZV - BEGV + 1; | |
279 | gl_state.offset = BEGV - 1; | |
280 | } | |
281 | else if (EQ (gl_state.object, Qt)) | |
282 | { | |
283 | gl_state.b_property = 0; | |
284 | gl_state.e_property = PTRDIFF_MAX; | |
285 | gl_state.offset = 0; | |
286 | } | |
287 | else | |
288 | { | |
289 | gl_state.b_property = 0; | |
290 | gl_state.e_property = 1 + SCHARS (gl_state.object); | |
291 | gl_state.offset = 0; | |
292 | } | |
293 | if (parse_sexp_lookup_properties) | |
294 | update_syntax_table (from + gl_state.offset - (count <= 0), | |
295 | count, 1, gl_state.object); | |
296 | } | |
297 | ||
6a140a74 RS |
298 | /* Update gl_state to an appropriate interval which contains CHARPOS. The |
299 | sign of COUNT give the relative position of CHARPOS wrt the previously | |
195d1361 | 300 | valid interval. If INIT, only [be]_property fields of gl_state are |
6a140a74 | 301 | valid at start, the rest is filled basing on OBJECT. |
195d1361 | 302 | |
6a140a74 | 303 | `gl_state.*_i' are the intervals, and CHARPOS is further in the search |
195d1361 RS |
304 | direction than the intervals - or in an interval. We update the |
305 | current syntax-table basing on the property of this interval, and | |
6a140a74 | 306 | update the interval to start further than CHARPOS - or be |
77c7bcb1 | 307 | NULL. We also update lim_property to be the next value of |
6a140a74 | 308 | charpos to call this subroutine again - or be before/after the |
195d1361 RS |
309 | start/end of OBJECT. */ |
310 | ||
311 | void | |
1fc71008 | 312 | update_syntax_table (ptrdiff_t charpos, EMACS_INT count, bool init, |
4f3a2f8d | 313 | Lisp_Object object) |
195d1361 RS |
314 | { |
315 | Lisp_Object tmp_table; | |
1fc71008 PE |
316 | int cnt = 0; |
317 | bool invalidate = 1; | |
5a774522 | 318 | INTERVAL i; |
195d1361 RS |
319 | |
320 | if (init) | |
321 | { | |
bb0de084 | 322 | gl_state.old_prop = Qnil; |
195d1361 RS |
323 | gl_state.start = gl_state.b_property; |
324 | gl_state.stop = gl_state.e_property; | |
bb0de084 SM |
325 | i = interval_of (charpos, object); |
326 | gl_state.backward_i = gl_state.forward_i = i; | |
195d1361 | 327 | invalidate = 0; |
77c7bcb1 | 328 | if (!i) |
195d1361 | 329 | return; |
f902a008 | 330 | /* interval_of updates only ->position of the return value, so |
d80f4cc7 | 331 | update the parents manually to speed up update_interval. */ |
bb0de084 | 332 | while (!NULL_PARENT (i)) |
d80f4cc7 RS |
333 | { |
334 | if (AM_RIGHT_CHILD (i)) | |
439d5cb4 | 335 | INTERVAL_PARENT (i)->position = i->position |
d80f4cc7 | 336 | - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */ |
439d5cb4 KR |
337 | - TOTAL_LENGTH (INTERVAL_PARENT (i)) |
338 | + LEFT_TOTAL_LENGTH (INTERVAL_PARENT (i)); | |
d80f4cc7 | 339 | else |
439d5cb4 | 340 | INTERVAL_PARENT (i)->position = i->position - LEFT_TOTAL_LENGTH (i) |
d80f4cc7 | 341 | + TOTAL_LENGTH (i); |
439d5cb4 | 342 | i = INTERVAL_PARENT (i); |
d80f4cc7 RS |
343 | } |
344 | i = gl_state.forward_i; | |
bb0de084 | 345 | gl_state.b_property = i->position - gl_state.offset; |
ee0cdb48 | 346 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
347 | goto update; |
348 | } | |
5a774522 | 349 | i = count > 0 ? gl_state.forward_i : gl_state.backward_i; |
195d1361 | 350 | |
423e705d | 351 | /* We are guaranteed to be called with CHARPOS either in i, |
6a140a74 | 352 | or further off. */ |
77c7bcb1 | 353 | if (!i) |
195d1361 | 354 | error ("Error in syntax_table logic for to-the-end intervals"); |
6a140a74 | 355 | else if (charpos < i->position) /* Move left. */ |
195d1361 RS |
356 | { |
357 | if (count > 0) | |
f902a008 | 358 | error ("Error in syntax_table logic for intervals <-"); |
195d1361 | 359 | /* Update the interval. */ |
6a140a74 | 360 | i = update_interval (i, charpos); |
bb0de084 | 361 | if (INTERVAL_LAST_POS (i) != gl_state.b_property) |
195d1361 RS |
362 | { |
363 | invalidate = 0; | |
195d1361 | 364 | gl_state.forward_i = i; |
ee0cdb48 | 365 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 | 366 | } |
423e705d | 367 | } |
6a140a74 | 368 | else if (charpos >= INTERVAL_LAST_POS (i)) /* Move right. */ |
195d1361 RS |
369 | { |
370 | if (count < 0) | |
f902a008 | 371 | error ("Error in syntax_table logic for intervals ->"); |
195d1361 | 372 | /* Update the interval. */ |
6a140a74 | 373 | i = update_interval (i, charpos); |
bb0de084 | 374 | if (i->position != gl_state.e_property) |
195d1361 RS |
375 | { |
376 | invalidate = 0; | |
195d1361 | 377 | gl_state.backward_i = i; |
bb0de084 | 378 | gl_state.b_property = i->position - gl_state.offset; |
195d1361 RS |
379 | } |
380 | } | |
195d1361 RS |
381 | |
382 | update: | |
383 | tmp_table = textget (i->plist, Qsyntax_table); | |
384 | ||
385 | if (invalidate) | |
386 | invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */ | |
7d0393cf | 387 | |
423e705d SM |
388 | if (invalidate) /* Did not get to adjacent interval. */ |
389 | { /* with the same table => */ | |
390 | /* invalidate the old range. */ | |
195d1361 RS |
391 | if (count > 0) |
392 | { | |
393 | gl_state.backward_i = i; | |
bb0de084 SM |
394 | gl_state.b_property = i->position - gl_state.offset; |
395 | } | |
396 | else | |
195d1361 | 397 | { |
bb0de084 | 398 | gl_state.forward_i = i; |
ee0cdb48 | 399 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
400 | } |
401 | } | |
37bef230 | 402 | |
bb0de084 | 403 | if (!EQ (tmp_table, gl_state.old_prop)) |
195d1361 | 404 | { |
bb0de084 SM |
405 | gl_state.current_syntax_table = tmp_table; |
406 | gl_state.old_prop = tmp_table; | |
407 | if (EQ (Fsyntax_table_p (tmp_table), Qt)) | |
408 | { | |
409 | gl_state.use_global = 0; | |
7d0393cf | 410 | } |
bb0de084 SM |
411 | else if (CONSP (tmp_table)) |
412 | { | |
413 | gl_state.use_global = 1; | |
414 | gl_state.global_code = tmp_table; | |
415 | } | |
7d0393cf | 416 | else |
bb0de084 SM |
417 | { |
418 | gl_state.use_global = 0; | |
4b4deea2 | 419 | gl_state.current_syntax_table = BVAR (current_buffer, syntax_table); |
bb0de084 | 420 | } |
195d1361 RS |
421 | } |
422 | ||
77c7bcb1 | 423 | while (i) |
195d1361 RS |
424 | { |
425 | if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table))) | |
426 | { | |
427 | if (count > 0) | |
bb0de084 SM |
428 | { |
429 | gl_state.e_property = i->position - gl_state.offset; | |
430 | gl_state.forward_i = i; | |
431 | } | |
432 | else | |
433 | { | |
5a774522 SM |
434 | gl_state.b_property |
435 | = i->position + LENGTH (i) - gl_state.offset; | |
bb0de084 SM |
436 | gl_state.backward_i = i; |
437 | } | |
438 | return; | |
195d1361 | 439 | } |
7d0393cf | 440 | else if (cnt == INTERVALS_AT_ONCE) |
195d1361 RS |
441 | { |
442 | if (count > 0) | |
bb0de084 | 443 | { |
5a774522 SM |
444 | gl_state.e_property |
445 | = i->position + LENGTH (i) - gl_state.offset | |
446 | /* e_property at EOB is not set to ZV but to ZV+1, so that | |
447 | we can do INC(from);UPDATE_SYNTAX_TABLE_FORWARD without | |
448 | having to check eob between the two. */ | |
77c7bcb1 | 449 | + (next_interval (i) ? 0 : 1); |
bb0de084 SM |
450 | gl_state.forward_i = i; |
451 | } | |
452 | else | |
453 | { | |
454 | gl_state.b_property = i->position - gl_state.offset; | |
455 | gl_state.backward_i = i; | |
456 | } | |
457 | return; | |
195d1361 RS |
458 | } |
459 | cnt++; | |
460 | i = count > 0 ? next_interval (i) : previous_interval (i); | |
461 | } | |
77c7bcb1 | 462 | eassert (i == NULL); /* This property goes to the end. */ |
bb0de084 SM |
463 | if (count > 0) |
464 | gl_state.e_property = gl_state.stop; | |
465 | else | |
466 | gl_state.b_property = gl_state.start; | |
195d1361 RS |
467 | } |
468 | \f | |
1fc71008 | 469 | /* Returns true if char at CHARPOS is quoted. |
6a140a74 RS |
470 | Global syntax-table data should be set up already to be good at CHARPOS |
471 | or after. On return global syntax data is good for lookup at CHARPOS. */ | |
195d1361 | 472 | |
1fc71008 | 473 | static bool |
d311d28c | 474 | char_quoted (ptrdiff_t charpos, ptrdiff_t bytepos) |
195d1361 | 475 | { |
1fc71008 PE |
476 | enum syntaxcode code; |
477 | ptrdiff_t beg = BEGV; | |
478 | bool quoted = 0; | |
d311d28c | 479 | ptrdiff_t orig = charpos; |
6a140a74 | 480 | |
02d8b017 | 481 | while (charpos > beg) |
195d1361 | 482 | { |
ab229fdd | 483 | int c; |
02d8b017 | 484 | DEC_BOTH (charpos, bytepos); |
ab229fdd | 485 | |
6a140a74 | 486 | UPDATE_SYNTAX_TABLE_BACKWARD (charpos); |
327719ee | 487 | c = FETCH_CHAR_AS_MULTIBYTE (bytepos); |
ab229fdd | 488 | code = SYNTAX (c); |
6a140a74 RS |
489 | if (! (code == Scharquote || code == Sescape)) |
490 | break; | |
491 | ||
6a140a74 | 492 | quoted = !quoted; |
195d1361 | 493 | } |
6a140a74 RS |
494 | |
495 | UPDATE_SYNTAX_TABLE (orig); | |
195d1361 RS |
496 | return quoted; |
497 | } | |
6a140a74 | 498 | |
6a140a74 RS |
499 | /* Return the bytepos one character before BYTEPOS. |
500 | We assume that BYTEPOS is not at the start of the buffer. */ | |
501 | ||
b0ab8123 | 502 | static ptrdiff_t |
d311d28c | 503 | dec_bytepos (ptrdiff_t bytepos) |
6a140a74 | 504 | { |
4b4deea2 | 505 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ef316cf0 RS |
506 | return bytepos - 1; |
507 | ||
6a140a74 RS |
508 | DEC_POS (bytepos); |
509 | return bytepos; | |
510 | } | |
195d1361 | 511 | \f |
2b34df4e | 512 | /* Return a defun-start position before POS and not too far before. |
7cc80f0a RS |
513 | It should be the last one before POS, or nearly the last. |
514 | ||
515 | When open_paren_in_column_0_is_defun_start is nonzero, | |
1fd1cc2f | 516 | only the beginning of the buffer is treated as a defun-start. |
7cc80f0a RS |
517 | |
518 | We record the information about where the scan started | |
519 | and what its result was, so that another call in the same area | |
520 | can return the same value very quickly. | |
195d1361 RS |
521 | |
522 | There is no promise at which position the global syntax data is | |
523 | valid on return from the subroutine, so the caller should explicitly | |
524 | update the global data. */ | |
37bef230 | 525 | |
d311d28c PE |
526 | static ptrdiff_t |
527 | find_defun_start (ptrdiff_t pos, ptrdiff_t pos_byte) | |
37bef230 | 528 | { |
d311d28c | 529 | ptrdiff_t opoint = PT, opoint_byte = PT_BYTE; |
37bef230 | 530 | |
1fd1cc2f RS |
531 | if (!open_paren_in_column_0_is_defun_start) |
532 | { | |
6e20a0d4 | 533 | find_start_value = BEGV; |
1fd1cc2f | 534 | find_start_value_byte = BEGV_BYTE; |
6e20a0d4 CY |
535 | find_start_buffer = current_buffer; |
536 | find_start_modiff = MODIFF; | |
537 | find_start_begv = BEGV; | |
538 | find_start_pos = pos; | |
1fd1cc2f RS |
539 | return BEGV; |
540 | } | |
541 | ||
37bef230 RS |
542 | /* Use previous finding, if it's valid and applies to this inquiry. */ |
543 | if (current_buffer == find_start_buffer | |
544 | /* Reuse the defun-start even if POS is a little farther on. | |
545 | POS might be in the next defun, but that's ok. | |
546 | Our value may not be the best possible, but will still be usable. */ | |
547 | && pos <= find_start_pos + 1000 | |
548 | && pos >= find_start_value | |
549 | && BEGV == find_start_begv | |
550 | && MODIFF == find_start_modiff) | |
551 | return find_start_value; | |
552 | ||
553 | /* Back up to start of line. */ | |
6a140a74 | 554 | scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1); |
37bef230 | 555 | |
195d1361 RS |
556 | /* We optimize syntax-table lookup for rare updates. Thus we accept |
557 | only those `^\s(' which are good in global _and_ text-property | |
558 | syntax-tables. */ | |
d48cd3f4 | 559 | SETUP_BUFFER_SYNTAX_TABLE (); |
1fd1cc2f | 560 | while (PT > BEGV) |
37bef230 | 561 | { |
ab229fdd AS |
562 | int c; |
563 | ||
1fd1cc2f RS |
564 | /* Open-paren at start of line means we may have found our |
565 | defun-start. */ | |
327719ee | 566 | c = FETCH_CHAR_AS_MULTIBYTE (PT_BYTE); |
ab229fdd | 567 | if (SYNTAX (c) == Sopen) |
195d1361 | 568 | { |
1fd1cc2f | 569 | SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */ |
327719ee | 570 | c = FETCH_CHAR_AS_MULTIBYTE (PT_BYTE); |
ab229fdd | 571 | if (SYNTAX (c) == Sopen) |
1fd1cc2f RS |
572 | break; |
573 | /* Now fallback to the default value. */ | |
d48cd3f4 | 574 | SETUP_BUFFER_SYNTAX_TABLE (); |
195d1361 | 575 | } |
1fd1cc2f RS |
576 | /* Move to beg of previous line. */ |
577 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1); | |
37bef230 RS |
578 | } |
579 | ||
580 | /* Record what we found, for the next try. */ | |
6a140a74 RS |
581 | find_start_value = PT; |
582 | find_start_value_byte = PT_BYTE; | |
37bef230 RS |
583 | find_start_buffer = current_buffer; |
584 | find_start_modiff = MODIFF; | |
585 | find_start_begv = BEGV; | |
586 | find_start_pos = pos; | |
587 | ||
6a140a74 RS |
588 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
589 | ||
37bef230 RS |
590 | return find_start_value; |
591 | } | |
592 | \f | |
f902a008 RS |
593 | /* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */ |
594 | ||
1fc71008 | 595 | static bool |
d311d28c | 596 | prev_char_comend_first (ptrdiff_t pos, ptrdiff_t pos_byte) |
f902a008 | 597 | { |
1fc71008 PE |
598 | int c; |
599 | bool val; | |
f902a008 RS |
600 | |
601 | DEC_BOTH (pos, pos_byte); | |
602 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
603 | c = FETCH_CHAR (pos_byte); | |
604 | val = SYNTAX_COMEND_FIRST (c); | |
605 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
606 | return val; | |
607 | } | |
608 | ||
1fc71008 | 609 | /* Check whether charpos FROM is at the end of a comment. |
6a140a74 RS |
610 | FROM_BYTE is the bytepos corresponding to FROM. |
611 | Do not move back before STOP. | |
612 | ||
1fc71008 | 613 | Return true if we find a comment ending at FROM/FROM_BYTE. |
6a140a74 RS |
614 | |
615 | If successful, store the charpos of the comment's beginning | |
616 | into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR. | |
527a32d9 KH |
617 | |
618 | Global syntax data remains valid for backward search starting at | |
619 | the returned value (or at FROM, if the search was not successful). */ | |
195d1361 | 620 | |
1fc71008 PE |
621 | static bool |
622 | back_comment (ptrdiff_t from, ptrdiff_t from_byte, ptrdiff_t stop, | |
623 | bool comnested, int comstyle, ptrdiff_t *charpos_ptr, | |
624 | ptrdiff_t *bytepos_ptr) | |
195d1361 RS |
625 | { |
626 | /* Look back, counting the parity of string-quotes, | |
627 | and recording the comment-starters seen. | |
628 | When we reach a safe place, assume that's not in a string; | |
629 | then step the main scan to the earliest comment-starter seen | |
630 | an even number of string quotes away from the safe place. | |
631 | ||
632 | OFROM[I] is position of the earliest comment-starter seen | |
633 | which is I+2X quotes from the comment-end. | |
634 | PARITY is current parity of quotes from the comment end. */ | |
3ee5041c | 635 | int string_style = -1; /* Presumed outside of any string. */ |
1fc71008 | 636 | bool string_lossage = 0; |
f7c436c1 | 637 | /* Not a real lossage: indicates that we have passed a matching comment |
7d0393cf | 638 | starter plus a non-matching comment-ender, meaning that any matching |
f7c436c1 SM |
639 | comment-starter we might see later could be a false positive (hidden |
640 | inside another comment). | |
641 | Test case: { a (* b } c (* d *) */ | |
1fc71008 | 642 | bool comment_lossage = 0; |
d311d28c PE |
643 | ptrdiff_t comment_end = from; |
644 | ptrdiff_t comment_end_byte = from_byte; | |
645 | ptrdiff_t comstart_pos = 0; | |
646 | ptrdiff_t comstart_byte IF_LINT (= 0); | |
eb35b628 RS |
647 | /* Place where the containing defun starts, |
648 | or 0 if we didn't come across it yet. */ | |
d311d28c PE |
649 | ptrdiff_t defun_start = 0; |
650 | ptrdiff_t defun_start_byte = 0; | |
1fc71008 PE |
651 | enum syntaxcode code; |
652 | ptrdiff_t nesting = 1; /* current comment nesting */ | |
ea315ed6 | 653 | int c; |
3f679f55 SM |
654 | int syntax = 0; |
655 | ||
656 | /* FIXME: A }} comment-ender style leads to incorrect behavior | |
657 | in the case of {{ c }}} because we ignore the last two chars which are | |
658 | assumed to be comment-enders although they aren't. */ | |
195d1361 RS |
659 | |
660 | /* At beginning of range to scan, we're outside of strings; | |
661 | that determines quote parity to the comment-end. */ | |
662 | while (from != stop) | |
663 | { | |
d311d28c | 664 | ptrdiff_t temp_byte; |
1fc71008 PE |
665 | int prev_syntax; |
666 | bool com2start, com2end, comstart; | |
6a140a74 | 667 | |
195d1361 | 668 | /* Move back and examine a character. */ |
6a140a74 | 669 | DEC_BOTH (from, from_byte); |
195d1361 RS |
670 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
671 | ||
3f679f55 | 672 | prev_syntax = syntax; |
b7dbcc19 | 673 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
3f679f55 | 674 | syntax = SYNTAX_WITH_FLAGS (c); |
195d1361 RS |
675 | code = SYNTAX (c); |
676 | ||
3f679f55 SM |
677 | /* Check for 2-char comment markers. */ |
678 | com2start = (SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
679 | && SYNTAX_FLAGS_COMSTART_SECOND (prev_syntax) | |
c5683ceb SM |
680 | && (comstyle |
681 | == SYNTAX_FLAGS_COMMENT_STYLE (prev_syntax, syntax)) | |
3f679f55 SM |
682 | && (SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax) |
683 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested); | |
684 | com2end = (SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
685 | && SYNTAX_FLAGS_COMEND_SECOND (prev_syntax)); | |
fbb3da77 | 686 | comstart = (com2start || code == Scomment); |
01f44d5a | 687 | |
3f679f55 SM |
688 | /* Nasty cases with overlapping 2-char comment markers: |
689 | - snmp-mode: -- c -- foo -- c -- | |
690 | --- c -- | |
691 | ------ c -- | |
692 | - c-mode: *||* | |
693 | |* *|* *| | |
694 | |*| |* |*| | |
695 | /// */ | |
696 | ||
697 | /* If a 2-char comment sequence partly overlaps with another, | |
fbb3da77 SM |
698 | we don't try to be clever. E.g. |*| in C, or }% in modes that |
699 | have %..\n and %{..}%. */ | |
700 | if (from > stop && (com2end || comstart)) | |
195d1361 | 701 | { |
d311d28c | 702 | ptrdiff_t next = from, next_byte = from_byte; |
4f3a2f8d | 703 | int next_c, next_syntax; |
3f679f55 SM |
704 | DEC_BOTH (next, next_byte); |
705 | UPDATE_SYNTAX_TABLE_BACKWARD (next); | |
b7dbcc19 | 706 | next_c = FETCH_CHAR_AS_MULTIBYTE (next_byte); |
3f679f55 | 707 | next_syntax = SYNTAX_WITH_FLAGS (next_c); |
fbb3da77 | 708 | if (((comstart || comnested) |
3f679f55 SM |
709 | && SYNTAX_FLAGS_COMEND_SECOND (syntax) |
710 | && SYNTAX_FLAGS_COMEND_FIRST (next_syntax)) | |
711 | || ((com2end || comnested) | |
712 | && SYNTAX_FLAGS_COMSTART_SECOND (syntax) | |
c5683ceb SM |
713 | && (comstyle |
714 | == SYNTAX_FLAGS_COMMENT_STYLE (syntax, prev_syntax)) | |
3f679f55 SM |
715 | && SYNTAX_FLAGS_COMSTART_FIRST (next_syntax))) |
716 | goto lossage; | |
717 | /* UPDATE_SYNTAX_TABLE_FORWARD (next + 1); */ | |
f902a008 | 718 | } |
3f679f55 SM |
719 | |
720 | if (com2start && comstart_pos == 0) | |
721 | /* We're looking at a comment starter. But it might be a comment | |
722 | ender as well (see snmp-mode). The first time we see one, we | |
723 | need to consider it as a comment starter, | |
724 | and the subsequent times as a comment ender. */ | |
725 | com2end = 0; | |
726 | ||
727 | /* Turn a 2-char comment sequences into the appropriate syntax. */ | |
728 | if (com2end) | |
729 | code = Sendcomment; | |
730 | else if (com2start) | |
731 | code = Scomment; | |
732 | /* Ignore comment starters of a different style. */ | |
733 | else if (code == Scomment | |
c5683ceb | 734 | && (comstyle != SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0) |
3f679f55 | 735 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax) != comnested)) |
1aa963c8 | 736 | continue; |
195d1361 | 737 | |
9828a477 KH |
738 | /* Ignore escaped characters, except comment-enders. */ |
739 | if (code != Sendcomment && char_quoted (from, from_byte)) | |
195d1361 RS |
740 | continue; |
741 | ||
3ee5041c | 742 | switch (code) |
195d1361 | 743 | { |
3ee5041c SM |
744 | case Sstring_fence: |
745 | case Scomment_fence: | |
746 | c = (code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE); | |
747 | case Sstring: | |
748 | /* Track parity of quotes. */ | |
749 | if (string_style == -1) | |
750 | /* Entering a string. */ | |
751 | string_style = c; | |
752 | else if (string_style == c) | |
753 | /* Leaving the string. */ | |
754 | string_style = -1; | |
755 | else | |
756 | /* If we have two kinds of string delimiters. | |
757 | There's no way to grok this scanning backwards. */ | |
195d1361 | 758 | string_lossage = 1; |
3ee5041c | 759 | break; |
7d0393cf | 760 | |
3ee5041c SM |
761 | case Scomment: |
762 | /* We've already checked that it is the relevant comstyle. */ | |
f7c436c1 | 763 | if (string_style != -1 || comment_lossage || string_lossage) |
3ee5041c SM |
764 | /* There are odd string quotes involved, so let's be careful. |
765 | Test case in Pascal: " { " a { " } */ | |
766 | goto lossage; | |
767 | ||
f7c436c1 SM |
768 | if (!comnested) |
769 | { | |
770 | /* Record best comment-starter so far. */ | |
771 | comstart_pos = from; | |
772 | comstart_byte = from_byte; | |
773 | } | |
774 | else if (--nesting <= 0) | |
95ff8dfc RS |
775 | /* nested comments have to be balanced, so we don't need to |
776 | keep looking for earlier ones. We use here the same (slightly | |
777 | incorrect) reasoning as below: since it is followed by uniform | |
778 | paired string quotes, this comment-start has to be outside of | |
779 | strings, else the comment-end itself would be inside a string. */ | |
780 | goto done; | |
3ee5041c SM |
781 | break; |
782 | ||
02010917 | 783 | case Sendcomment: |
c5683ceb | 784 | if (SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0) == comstyle |
d070eb22 | 785 | && ((com2end && SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax)) |
3f679f55 | 786 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested) |
02010917 SM |
787 | /* This is the same style of comment ender as ours. */ |
788 | { | |
789 | if (comnested) | |
790 | nesting++; | |
791 | else | |
792 | /* Anything before that can't count because it would match | |
793 | this comment-ender rather than ours. */ | |
794 | from = stop; /* Break out of the loop. */ | |
795 | } | |
f7c436c1 SM |
796 | else if (comstart_pos != 0 || c != '\n') |
797 | /* We're mixing comment styles here, so we'd better be careful. | |
798 | The (comstart_pos != 0 || c != '\n') check is not quite correct | |
799 | (we should just always set comment_lossage), but removing it | |
800 | would imply that any multiline comment in C would go through | |
801 | lossage, which seems overkill. | |
802 | The failure should only happen in the rare cases such as | |
803 | { (* } *) */ | |
804 | comment_lossage = 1; | |
02010917 | 805 | break; |
195d1361 | 806 | |
02010917 SM |
807 | case Sopen: |
808 | /* Assume a defun-start point is outside of strings. */ | |
809 | if (open_paren_in_column_0_is_defun_start | |
810 | && (from == stop | |
811 | || (temp_byte = dec_bytepos (from_byte), | |
812 | FETCH_CHAR (temp_byte) == '\n'))) | |
813 | { | |
814 | defun_start = from; | |
815 | defun_start_byte = from_byte; | |
816 | from = stop; /* Break out of the loop. */ | |
817 | } | |
eb35b628 | 818 | break; |
02010917 SM |
819 | |
820 | default: | |
f7c436c1 | 821 | break; |
eb35b628 | 822 | } |
195d1361 RS |
823 | } |
824 | ||
825 | if (comstart_pos == 0) | |
826 | { | |
827 | from = comment_end; | |
6a140a74 | 828 | from_byte = comment_end_byte; |
195d1361 RS |
829 | UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1); |
830 | } | |
f7c436c1 SM |
831 | /* If comstart_pos is set and we get here (ie. didn't jump to `lossage' |
832 | or `done'), then we've found the beginning of the non-nested comment. */ | |
833 | else if (1) /* !comnested */ | |
195d1361 RS |
834 | { |
835 | from = comstart_pos; | |
6a140a74 | 836 | from_byte = comstart_byte; |
789f3320 | 837 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
195d1361 RS |
838 | } |
839 | else | |
840 | { | |
3ee5041c SM |
841 | struct lisp_parse_state state; |
842 | lossage: | |
195d1361 RS |
843 | /* We had two kinds of string delimiters mixed up |
844 | together. Decode this going forwards. | |
02010917 | 845 | Scan fwd from a known safe place (beginning-of-defun) |
195d1361 RS |
846 | to the one in question; this records where we |
847 | last passed a comment starter. */ | |
eb35b628 RS |
848 | /* If we did not already find the defun start, find it now. */ |
849 | if (defun_start == 0) | |
850 | { | |
851 | defun_start = find_defun_start (comment_end, comment_end_byte); | |
852 | defun_start_byte = find_start_value_byte; | |
853 | } | |
02010917 | 854 | do |
195d1361 | 855 | { |
02010917 SM |
856 | scan_sexps_forward (&state, |
857 | defun_start, defun_start_byte, | |
d311d28c PE |
858 | comment_end, TYPE_MINIMUM (EMACS_INT), |
859 | 0, Qnil, 0); | |
02010917 SM |
860 | defun_start = comment_end; |
861 | if (state.incomment == (comnested ? 1 : -1) | |
862 | && state.comstyle == comstyle) | |
863 | from = state.comstr_start; | |
864 | else | |
865 | { | |
866 | from = comment_end; | |
867 | if (state.incomment) | |
868 | /* If comment_end is inside some other comment, maybe ours | |
869 | is nested, so we need to try again from within the | |
870 | surrounding comment. Example: { a (* " *) */ | |
871 | { | |
872 | /* FIXME: We should advance by one or two chars. */ | |
873 | defun_start = state.comstr_start + 2; | |
874 | defun_start_byte = CHAR_TO_BYTE (defun_start); | |
875 | } | |
876 | } | |
877 | } while (defun_start < comment_end); | |
878 | ||
6a140a74 | 879 | from_byte = CHAR_TO_BYTE (from); |
195d1361 RS |
880 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
881 | } | |
7d0393cf | 882 | |
95ff8dfc | 883 | done: |
6a140a74 RS |
884 | *charpos_ptr = from; |
885 | *bytepos_ptr = from_byte; | |
886 | ||
1fc71008 | 887 | return from != comment_end; |
195d1361 RS |
888 | } |
889 | \f | |
8489eb67 | 890 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
fdb82f93 PJ |
891 | doc: /* Return t if OBJECT is a syntax table. |
892 | Currently, any char-table counts as a syntax table. */) | |
5842a27b | 893 | (Lisp_Object object) |
8489eb67 | 894 | { |
2203e1e8 | 895 | if (CHAR_TABLE_P (object) |
e704cb4b | 896 | && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table)) |
8489eb67 RS |
897 | return Qt; |
898 | return Qnil; | |
899 | } | |
900 | ||
8ea151b2 | 901 | static void |
971de7fb | 902 | check_syntax_table (Lisp_Object obj) |
8489eb67 | 903 | { |
47f5f6ae KS |
904 | CHECK_TYPE (CHAR_TABLE_P (obj) && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table), |
905 | Qsyntax_table_p, obj); | |
7d0393cf | 906 | } |
8489eb67 | 907 | |
8489eb67 | 908 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, |
fdb82f93 PJ |
909 | doc: /* Return the current syntax table. |
910 | This is the one specified by the current buffer. */) | |
5842a27b | 911 | (void) |
8489eb67 | 912 | { |
4b4deea2 | 913 | return BVAR (current_buffer, syntax_table); |
8489eb67 RS |
914 | } |
915 | ||
916 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
917 | Sstandard_syntax_table, 0, 0, 0, | |
fdb82f93 PJ |
918 | doc: /* Return the standard syntax table. |
919 | This is the one used for new buffers. */) | |
5842a27b | 920 | (void) |
8489eb67 RS |
921 | { |
922 | return Vstandard_syntax_table; | |
923 | } | |
924 | ||
925 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
fdb82f93 PJ |
926 | doc: /* Construct a new syntax table and return it. |
927 | It is a copy of the TABLE, which defaults to the standard syntax table. */) | |
5842a27b | 928 | (Lisp_Object table) |
8489eb67 | 929 | { |
8ea151b2 RS |
930 | Lisp_Object copy; |
931 | ||
265a9e55 | 932 | if (!NILP (table)) |
8ea151b2 RS |
933 | check_syntax_table (table); |
934 | else | |
935 | table = Vstandard_syntax_table; | |
936 | ||
937 | copy = Fcopy_sequence (table); | |
0f867324 RS |
938 | |
939 | /* Only the standard syntax table should have a default element. | |
940 | Other syntax tables should inherit from parents instead. */ | |
742af32f | 941 | set_char_table_defalt (copy, Qnil); |
0f867324 RS |
942 | |
943 | /* Copied syntax tables should all have parents. | |
944 | If we copied one with no parent, such as the standard syntax table, | |
945 | use the standard syntax table as the copy's parent. */ | |
946 | if (NILP (XCHAR_TABLE (copy)->parent)) | |
947 | Fset_char_table_parent (copy, Vstandard_syntax_table); | |
8ea151b2 | 948 | return copy; |
8489eb67 RS |
949 | } |
950 | ||
951 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
fdb82f93 PJ |
952 | doc: /* Select a new syntax table for the current buffer. |
953 | One argument, a syntax table. */) | |
5842a27b | 954 | (Lisp_Object table) |
8489eb67 | 955 | { |
4e4dfa78 | 956 | int idx; |
8ea151b2 | 957 | check_syntax_table (table); |
39eb03f1 | 958 | bset_syntax_table (current_buffer, table); |
8489eb67 | 959 | /* Indicate that this buffer now has a specified syntax table. */ |
f6cd0527 GM |
960 | idx = PER_BUFFER_VAR_IDX (syntax_table); |
961 | SET_PER_BUFFER_VALUE_P (current_buffer, idx, 1); | |
8489eb67 RS |
962 | return table; |
963 | } | |
964 | \f | |
965 | /* Convert a letter which signifies a syntax code | |
966 | into the code it signifies. | |
195d1361 | 967 | This is used by modify-syntax-entry, and other things. */ |
8489eb67 | 968 | |
1fc71008 | 969 | unsigned char const syntax_spec_code[0400] = |
8489eb67 RS |
970 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
971 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
972 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
973 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
1fc71008 PE |
974 | Swhitespace, Scomment_fence, Sstring, 0377, Smath, 0377, 0377, Squote, |
975 | Sopen, Sclose, 0377, 0377, 0377, Swhitespace, Spunct, Scharquote, | |
8489eb67 | 976 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
1fc71008 PE |
977 | 0377, 0377, 0377, 0377, Scomment, 0377, Sendcomment, 0377, |
978 | Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ | |
8489eb67 | 979 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
1fc71008 PE |
980 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, Sword, |
981 | 0377, 0377, 0377, 0377, Sescape, 0377, 0377, Ssymbol, | |
8489eb67 RS |
982 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ |
983 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
1fc71008 PE |
984 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, Sword, |
985 | 0377, 0377, 0377, 0377, Sstring_fence, 0377, 0377, 0377 | |
8489eb67 RS |
986 | }; |
987 | ||
195d1361 | 988 | /* Indexed by syntax code, give the letter that describes it. */ |
8489eb67 | 989 | |
1fc71008 | 990 | char const syntax_code_spec[16] = |
8489eb67 | 991 | { |
195d1361 RS |
992 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@', |
993 | '!', '|' | |
8489eb67 | 994 | }; |
93da5fff KH |
995 | |
996 | /* Indexed by syntax code, give the object (cons of syntax code and | |
997 | nil) to be stored in syntax table. Since these objects can be | |
998 | shared among syntax tables, we generate them in advance. By | |
999 | sharing objects, the function `describe-syntax' can give a more | |
1000 | compact listing. */ | |
1001 | static Lisp_Object Vsyntax_code_object; | |
1002 | ||
8489eb67 RS |
1003 | \f |
1004 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, | |
fdb82f93 | 1005 | doc: /* Return the syntax code of CHARACTER, described by a character. |
e2b6daf4 CY |
1006 | For example, if CHARACTER is a word constituent, the |
1007 | character `w' (119) is returned. | |
fdb82f93 PJ |
1008 | The characters that correspond to various syntax codes |
1009 | are listed in the documentation of `modify-syntax-entry'. */) | |
5842a27b | 1010 | (Lisp_Object character) |
8489eb67 | 1011 | { |
8ea151b2 | 1012 | int char_int; |
774b9a60 | 1013 | CHECK_CHARACTER (character); |
2203e1e8 | 1014 | char_int = XINT (character); |
d48cd3f4 | 1015 | SETUP_BUFFER_SYNTAX_TABLE (); |
1fc71008 | 1016 | return make_number (syntax_code_spec[SYNTAX (char_int)]); |
beefa22e RS |
1017 | } |
1018 | ||
1019 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
fdb82f93 | 1020 | doc: /* Return the matching parenthesis of CHARACTER, or nil if none. */) |
5842a27b | 1021 | (Lisp_Object character) |
beefa22e | 1022 | { |
1fc71008 PE |
1023 | int char_int; |
1024 | enum syntaxcode code; | |
1025 | CHECK_CHARACTER (character); | |
2203e1e8 | 1026 | char_int = XINT (character); |
d48cd3f4 | 1027 | SETUP_BUFFER_SYNTAX_TABLE (); |
8ea151b2 | 1028 | code = SYNTAX (char_int); |
a8bd7cd8 | 1029 | if (code == Sopen || code == Sclose) |
2e34157c | 1030 | return SYNTAX_MATCH (char_int); |
beefa22e | 1031 | return Qnil; |
8489eb67 RS |
1032 | } |
1033 | ||
c65adb44 | 1034 | DEFUN ("string-to-syntax", Fstring_to_syntax, Sstring_to_syntax, 1, 1, 0, |
6dcef6ec CY |
1035 | doc: /* Convert a syntax descriptor STRING into a raw syntax descriptor. |
1036 | STRING should be a string of the form allowed as argument of | |
1037 | `modify-syntax-entry'. The return value is a raw syntax descriptor: a | |
1038 | cons cell \(CODE . MATCHING-CHAR) which can be used, for example, as | |
1039 | the value of a `syntax-table' text property. */) | |
5842a27b | 1040 | (Lisp_Object string) |
8489eb67 | 1041 | { |
1fc71008 | 1042 | const unsigned char *p; |
247e20a8 | 1043 | int val; |
8ea151b2 | 1044 | Lisp_Object match; |
8489eb67 | 1045 | |
b7826503 | 1046 | CHECK_STRING (string); |
8489eb67 | 1047 | |
d5db4077 | 1048 | p = SDATA (string); |
1fc71008 PE |
1049 | val = syntax_spec_code[*p++]; |
1050 | if (val == 0377) | |
b764a653 | 1051 | error ("Invalid syntax description letter: %c", p[-1]); |
8489eb67 | 1052 | |
1fc71008 | 1053 | if (val == Sinherit) |
c65adb44 | 1054 | return Qnil; |
8ea151b2 RS |
1055 | |
1056 | if (*p) | |
d1be9f0f | 1057 | { |
93da5fff | 1058 | int len; |
62a6e103 | 1059 | int character = STRING_CHAR_AND_LENGTH (p, len); |
93da5fff | 1060 | XSETINT (match, character); |
d1be9f0f RS |
1061 | if (XFASTINT (match) == ' ') |
1062 | match = Qnil; | |
93da5fff | 1063 | p += len; |
d1be9f0f RS |
1064 | } |
1065 | else | |
8ea151b2 | 1066 | match = Qnil; |
8489eb67 | 1067 | |
8489eb67 RS |
1068 | while (*p) |
1069 | switch (*p++) | |
1070 | { | |
1071 | case '1': | |
247e20a8 | 1072 | val |= 1 << 16; |
8489eb67 RS |
1073 | break; |
1074 | ||
1075 | case '2': | |
247e20a8 | 1076 | val |= 1 << 17; |
8489eb67 RS |
1077 | break; |
1078 | ||
1079 | case '3': | |
247e20a8 | 1080 | val |= 1 << 18; |
8489eb67 RS |
1081 | break; |
1082 | ||
1083 | case '4': | |
247e20a8 | 1084 | val |= 1 << 19; |
8489eb67 RS |
1085 | break; |
1086 | ||
1087 | case 'p': | |
247e20a8 | 1088 | val |= 1 << 20; |
8489eb67 | 1089 | break; |
e5d4f4dc RS |
1090 | |
1091 | case 'b': | |
247e20a8 | 1092 | val |= 1 << 21; |
e5d4f4dc | 1093 | break; |
95ff8dfc RS |
1094 | |
1095 | case 'n': | |
1096 | val |= 1 << 22; | |
1097 | break; | |
c5683ceb SM |
1098 | |
1099 | case 'c': | |
1100 | val |= 1 << 23; | |
1101 | break; | |
8489eb67 | 1102 | } |
7d0393cf | 1103 | |
77b37c05 | 1104 | if (val < ASIZE (Vsyntax_code_object) && NILP (match)) |
28be1ada | 1105 | return AREF (Vsyntax_code_object, val); |
93da5fff KH |
1106 | else |
1107 | /* Since we can't use a shared object, let's make a new one. */ | |
c65adb44 SM |
1108 | return Fcons (make_number (val), match); |
1109 | } | |
1110 | ||
fdb82f93 | 1111 | /* I really don't know why this is interactive |
2c9e1900 | 1112 | help-form should at least be made useful whilst reading the second arg. */ |
7d0393cf | 1113 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, |
c65adb44 | 1114 | "cSet syntax for character: \nsSet syntax for %s to: ", |
a50a10a0 | 1115 | doc: /* Set syntax for character CHAR according to string NEWENTRY. |
d7ee9fab | 1116 | The syntax is changed only for table SYNTAX-TABLE, which defaults to |
fdb82f93 | 1117 | the current buffer's syntax table. |
5c7b02ab | 1118 | CHAR may be a cons (MIN . MAX), in which case, syntaxes of all characters |
fedc6ab5 | 1119 | in the range MIN to MAX are changed. |
fdb82f93 PJ |
1120 | The first character of NEWENTRY should be one of the following: |
1121 | Space or - whitespace syntax. w word constituent. | |
1122 | _ symbol constituent. . punctuation. | |
1123 | ( open-parenthesis. ) close-parenthesis. | |
1124 | " string quote. \\ escape. | |
1125 | $ paired delimiter. ' expression quote or prefix operator. | |
1126 | < comment starter. > comment ender. | |
02676e5d | 1127 | / character-quote. @ inherit from parent table. |
fdb82f93 PJ |
1128 | | generic string fence. ! generic comment fence. |
1129 | ||
1130 | Only single-character comment start and end sequences are represented thus. | |
1131 | Two-character sequences are represented as described below. | |
1132 | The second character of NEWENTRY is the matching parenthesis, | |
1133 | used only if the first character is `(' or `)'. | |
1134 | Any additional characters are flags. | |
1135 | Defined flags are the characters 1, 2, 3, 4, b, p, and n. | |
a50a10a0 PJ |
1136 | 1 means CHAR is the start of a two-char comment start sequence. |
1137 | 2 means CHAR is the second character of such a sequence. | |
1138 | 3 means CHAR is the start of a two-char comment end sequence. | |
1139 | 4 means CHAR is the second character of such a sequence. | |
fdb82f93 | 1140 | |
c5683ceb | 1141 | There can be several orthogonal comment sequences. This is to support |
fdb82f93 PJ |
1142 | language modes such as C++. By default, all comment sequences are of style |
1143 | a, but you can set the comment sequence style to b (on the second character | |
c5683ceb SM |
1144 | of a comment-start, and the first character of a comment-end sequence) and/or |
1145 | c (on any of its chars) using this flag: | |
a50a10a0 | 1146 | b means CHAR is part of comment sequence b. |
c5683ceb | 1147 | c means CHAR is part of comment sequence c. |
a50a10a0 | 1148 | n means CHAR is part of a nestable comment sequence. |
fdb82f93 | 1149 | |
a50a10a0 | 1150 | p means CHAR is a prefix character for `backward-prefix-chars'; |
fdb82f93 | 1151 | such characters are treated as whitespace when they occur |
a50a10a0 | 1152 | between expressions. |
fedc6ab5 | 1153 | usage: (modify-syntax-entry CHAR NEWENTRY &optional SYNTAX-TABLE) */) |
5842a27b | 1154 | (Lisp_Object c, Lisp_Object newentry, Lisp_Object syntax_table) |
c65adb44 | 1155 | { |
5c7b02ab KH |
1156 | if (CONSP (c)) |
1157 | { | |
8f924df7 KH |
1158 | CHECK_CHARACTER_CAR (c); |
1159 | CHECK_CHARACTER_CDR (c); | |
5c7b02ab KH |
1160 | } |
1161 | else | |
1162 | CHECK_CHARACTER (c); | |
c65adb44 SM |
1163 | |
1164 | if (NILP (syntax_table)) | |
4b4deea2 | 1165 | syntax_table = BVAR (current_buffer, syntax_table); |
c65adb44 SM |
1166 | else |
1167 | check_syntax_table (syntax_table); | |
8489eb67 | 1168 | |
5c7b02ab KH |
1169 | newentry = Fstring_to_syntax (newentry); |
1170 | if (CONSP (c)) | |
1171 | SET_RAW_SYNTAX_ENTRY_RANGE (syntax_table, c, newentry); | |
1172 | else | |
1173 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), newentry); | |
e5b94d44 CY |
1174 | |
1175 | /* We clear the regexp cache, since character classes can now have | |
1176 | different values from those in the compiled regexps.*/ | |
1177 | clear_regexp_cache (); | |
1178 | ||
8489eb67 RS |
1179 | return Qnil; |
1180 | } | |
1181 | \f | |
1182 | /* Dump syntax table to buffer in human-readable format */ | |
1183 | ||
62abe9cb SM |
1184 | DEFUN ("internal-describe-syntax-value", Finternal_describe_syntax_value, |
1185 | Sinternal_describe_syntax_value, 1, 1, 0, | |
1186 | doc: /* Insert a description of the internal syntax description SYNTAX at point. */) | |
5842a27b | 1187 | (Lisp_Object syntax) |
8489eb67 | 1188 | { |
1fc71008 PE |
1189 | int code, syntax_code; |
1190 | bool start1, start2, end1, end2, prefix, comstyleb, comstylec, comnested; | |
8489eb67 | 1191 | char str[2]; |
62abe9cb | 1192 | Lisp_Object first, match_lisp, value = syntax; |
8489eb67 | 1193 | |
8ea151b2 RS |
1194 | if (NILP (value)) |
1195 | { | |
62abe9cb SM |
1196 | insert_string ("default"); |
1197 | return syntax; | |
8ea151b2 RS |
1198 | } |
1199 | ||
908b7fea KH |
1200 | if (CHAR_TABLE_P (value)) |
1201 | { | |
62abe9cb SM |
1202 | insert_string ("deeper char-table ..."); |
1203 | return syntax; | |
908b7fea KH |
1204 | } |
1205 | ||
8ea151b2 RS |
1206 | if (!CONSP (value)) |
1207 | { | |
62abe9cb SM |
1208 | insert_string ("invalid"); |
1209 | return syntax; | |
8ea151b2 RS |
1210 | } |
1211 | ||
c1d497be KR |
1212 | first = XCAR (value); |
1213 | match_lisp = XCDR (value); | |
8ea151b2 | 1214 | |
d311d28c | 1215 | if (!INTEGERP (first) || !(NILP (match_lisp) || CHARACTERP (match_lisp))) |
8489eb67 | 1216 | { |
62abe9cb SM |
1217 | insert_string ("invalid"); |
1218 | return syntax; | |
8489eb67 RS |
1219 | } |
1220 | ||
d311d28c | 1221 | syntax_code = XINT (first) & INT_MAX; |
1fc71008 | 1222 | code = syntax_code & 0377; |
c5683ceb SM |
1223 | start1 = SYNTAX_FLAGS_COMSTART_FIRST (syntax_code); |
1224 | start2 = SYNTAX_FLAGS_COMSTART_SECOND (syntax_code);; | |
1225 | end1 = SYNTAX_FLAGS_COMEND_FIRST (syntax_code); | |
1226 | end2 = SYNTAX_FLAGS_COMEND_SECOND (syntax_code); | |
1227 | prefix = SYNTAX_FLAGS_PREFIX (syntax_code); | |
1228 | comstyleb = SYNTAX_FLAGS_COMMENT_STYLEB (syntax_code); | |
1229 | comstylec = SYNTAX_FLAGS_COMMENT_STYLEC (syntax_code); | |
1230 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (syntax_code); | |
8489eb67 | 1231 | |
1fc71008 | 1232 | if (Smax <= code) |
8489eb67 RS |
1233 | { |
1234 | insert_string ("invalid"); | |
62abe9cb | 1235 | return syntax; |
8489eb67 | 1236 | } |
8489eb67 | 1237 | |
1fc71008 | 1238 | str[0] = syntax_code_spec[code], str[1] = 0; |
8489eb67 RS |
1239 | insert (str, 1); |
1240 | ||
93da5fff KH |
1241 | if (NILP (match_lisp)) |
1242 | insert (" ", 1); | |
1243 | else | |
1244 | insert_char (XINT (match_lisp)); | |
8489eb67 | 1245 | |
8489eb67 RS |
1246 | if (start1) |
1247 | insert ("1", 1); | |
1248 | if (start2) | |
1249 | insert ("2", 1); | |
1250 | ||
1251 | if (end1) | |
1252 | insert ("3", 1); | |
1253 | if (end2) | |
1254 | insert ("4", 1); | |
1255 | ||
1256 | if (prefix) | |
1257 | insert ("p", 1); | |
c5683ceb | 1258 | if (comstyleb) |
e5d4f4dc | 1259 | insert ("b", 1); |
c5683ceb SM |
1260 | if (comstylec) |
1261 | insert ("c", 1); | |
e6365855 SM |
1262 | if (comnested) |
1263 | insert ("n", 1); | |
8489eb67 RS |
1264 | |
1265 | insert_string ("\twhich means: "); | |
1266 | ||
7393bcbb | 1267 | switch (code) |
8489eb67 RS |
1268 | { |
1269 | case Swhitespace: | |
1270 | insert_string ("whitespace"); break; | |
1271 | case Spunct: | |
1272 | insert_string ("punctuation"); break; | |
1273 | case Sword: | |
1274 | insert_string ("word"); break; | |
1275 | case Ssymbol: | |
1276 | insert_string ("symbol"); break; | |
1277 | case Sopen: | |
1278 | insert_string ("open"); break; | |
1279 | case Sclose: | |
1280 | insert_string ("close"); break; | |
1281 | case Squote: | |
d671382e | 1282 | insert_string ("prefix"); break; |
8489eb67 RS |
1283 | case Sstring: |
1284 | insert_string ("string"); break; | |
1285 | case Smath: | |
1286 | insert_string ("math"); break; | |
1287 | case Sescape: | |
1288 | insert_string ("escape"); break; | |
1289 | case Scharquote: | |
1290 | insert_string ("charquote"); break; | |
1291 | case Scomment: | |
1292 | insert_string ("comment"); break; | |
1293 | case Sendcomment: | |
1294 | insert_string ("endcomment"); break; | |
d671382e SM |
1295 | case Sinherit: |
1296 | insert_string ("inherit"); break; | |
1297 | case Scomment_fence: | |
1298 | insert_string ("comment fence"); break; | |
1299 | case Sstring_fence: | |
1300 | insert_string ("string fence"); break; | |
8489eb67 RS |
1301 | default: |
1302 | insert_string ("invalid"); | |
62abe9cb | 1303 | return syntax; |
8489eb67 RS |
1304 | } |
1305 | ||
8ea151b2 | 1306 | if (!NILP (match_lisp)) |
8489eb67 RS |
1307 | { |
1308 | insert_string (", matches "); | |
8ea151b2 | 1309 | insert_char (XINT (match_lisp)); |
8489eb67 RS |
1310 | } |
1311 | ||
1312 | if (start1) | |
1313 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
1314 | if (start2) | |
1315 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
1316 | ||
1317 | if (end1) | |
1318 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
1319 | if (end2) | |
1320 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
c5683ceb | 1321 | if (comstyleb) |
e5d4f4dc | 1322 | insert_string (" (comment style b)"); |
c5683ceb SM |
1323 | if (comstylec) |
1324 | insert_string (" (comment style c)"); | |
e6365855 SM |
1325 | if (comnested) |
1326 | insert_string (" (nestable)"); | |
e5d4f4dc | 1327 | |
8489eb67 RS |
1328 | if (prefix) |
1329 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
1330 | ||
62abe9cb SM |
1331 | return syntax; |
1332 | } | |
8489eb67 RS |
1333 | \f |
1334 | /* Return the position across COUNT words from FROM. | |
1335 | If that many words cannot be found before the end of the buffer, return 0. | |
1336 | COUNT negative means scan backward and stop at word beginning. */ | |
1337 | ||
d311d28c PE |
1338 | ptrdiff_t |
1339 | scan_words (register ptrdiff_t from, register EMACS_INT count) | |
8489eb67 | 1340 | { |
d311d28c PE |
1341 | register ptrdiff_t beg = BEGV; |
1342 | register ptrdiff_t end = ZV; | |
1343 | register ptrdiff_t from_byte = CHAR_TO_BYTE (from); | |
93da5fff KH |
1344 | register enum syntaxcode code; |
1345 | int ch0, ch1; | |
fca8fe46 | 1346 | Lisp_Object func, pos; |
8489eb67 RS |
1347 | |
1348 | immediate_quit = 1; | |
1349 | QUIT; | |
1350 | ||
195d1361 RS |
1351 | SETUP_SYNTAX_TABLE (from, count); |
1352 | ||
8489eb67 RS |
1353 | while (count > 0) |
1354 | { | |
1355 | while (1) | |
1356 | { | |
1357 | if (from == end) | |
1358 | { | |
1359 | immediate_quit = 0; | |
1360 | return 0; | |
1361 | } | |
195d1361 | 1362 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 1363 | ch0 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
93da5fff | 1364 | code = SYNTAX (ch0); |
6a140a74 | 1365 | INC_BOTH (from, from_byte); |
8489eb67 RS |
1366 | if (words_include_escapes |
1367 | && (code == Sescape || code == Scharquote)) | |
1368 | break; | |
1369 | if (code == Sword) | |
1370 | break; | |
8489eb67 | 1371 | } |
93da5fff KH |
1372 | /* Now CH0 is a character which begins a word and FROM is the |
1373 | position of the next character. */ | |
8f924df7 | 1374 | func = CHAR_TABLE_REF (Vfind_word_boundary_function_table, ch0); |
869bb237 | 1375 | if (! NILP (Ffboundp (func))) |
8489eb67 | 1376 | { |
869bb237 | 1377 | pos = call2 (func, make_number (from - 1), make_number (end)); |
17f85215 | 1378 | if (INTEGERP (pos) && from < XINT (pos) && XINT (pos) <= ZV) |
8f924df7 KH |
1379 | { |
1380 | from = XINT (pos); | |
1381 | from_byte = CHAR_TO_BYTE (from); | |
1382 | } | |
8489eb67 | 1383 | } |
869bb237 | 1384 | else |
8cb8232a | 1385 | { |
8cb8232a KH |
1386 | while (1) |
1387 | { | |
1388 | if (from == end) break; | |
1389 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
b7dbcc19 | 1390 | ch1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8cb8232a KH |
1391 | code = SYNTAX (ch1); |
1392 | if ((code != Sword | |
1393 | && (! words_include_escapes | |
1394 | || (code != Sescape && code != Scharquote))) | |
2b70a11c | 1395 | || word_boundary_p (ch0, ch1)) |
869bb237 | 1396 | break; |
8cb8232a KH |
1397 | INC_BOTH (from, from_byte); |
1398 | ch0 = ch1; | |
1399 | } | |
8489eb67 RS |
1400 | } |
1401 | count--; | |
1402 | } | |
1403 | while (count < 0) | |
1404 | { | |
1405 | while (1) | |
1406 | { | |
1407 | if (from == beg) | |
1408 | { | |
1409 | immediate_quit = 0; | |
1410 | return 0; | |
1411 | } | |
6a140a74 | 1412 | DEC_BOTH (from, from_byte); |
195d1361 | 1413 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 1414 | ch1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
93da5fff | 1415 | code = SYNTAX (ch1); |
8489eb67 RS |
1416 | if (words_include_escapes |
1417 | && (code == Sescape || code == Scharquote)) | |
1418 | break; | |
1419 | if (code == Sword) | |
1420 | break; | |
8489eb67 | 1421 | } |
93da5fff KH |
1422 | /* Now CH1 is a character which ends a word and FROM is the |
1423 | position of it. */ | |
8f924df7 | 1424 | func = CHAR_TABLE_REF (Vfind_word_boundary_function_table, ch1); |
869bb237 | 1425 | if (! NILP (Ffboundp (func))) |
8f924df7 | 1426 | { |
869bb237 | 1427 | pos = call2 (func, make_number (from), make_number (beg)); |
17f85215 | 1428 | if (INTEGERP (pos) && BEGV <= XINT (pos) && XINT (pos) < from) |
8f924df7 KH |
1429 | { |
1430 | from = XINT (pos); | |
1431 | from_byte = CHAR_TO_BYTE (from); | |
1432 | } | |
8489eb67 | 1433 | } |
869bb237 | 1434 | else |
8489eb67 | 1435 | { |
8cb8232a KH |
1436 | while (1) |
1437 | { | |
8cb8232a KH |
1438 | if (from == beg) |
1439 | break; | |
262be72a | 1440 | DEC_BOTH (from, from_byte); |
8cb8232a | 1441 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
262be72a | 1442 | ch0 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8cb8232a KH |
1443 | code = SYNTAX (ch0); |
1444 | if ((code != Sword | |
1445 | && (! words_include_escapes | |
1446 | || (code != Sescape && code != Scharquote))) | |
2b70a11c | 1447 | || word_boundary_p (ch0, ch1)) |
262be72a MB |
1448 | { |
1449 | INC_BOTH (from, from_byte); | |
1450 | break; | |
1451 | } | |
8cb8232a KH |
1452 | ch1 = ch0; |
1453 | } | |
8489eb67 RS |
1454 | } |
1455 | count++; | |
1456 | } | |
1457 | ||
1458 | immediate_quit = 0; | |
1459 | ||
1460 | return from; | |
1461 | } | |
1462 | ||
a7ca3326 | 1463 | DEFUN ("forward-word", Fforward_word, Sforward_word, 0, 1, "^p", |
fdb82f93 | 1464 | doc: /* Move point forward ARG words (backward if ARG is negative). |
f73f4ce6 | 1465 | If ARG is omitted or nil, move point forward one word. |
fdb82f93 PJ |
1466 | Normally returns t. |
1467 | If an edge of the buffer or a field boundary is reached, point is left there | |
1468 | and the function returns nil. Field boundaries are not noticed if | |
1469 | `inhibit-field-text-motion' is non-nil. */) | |
5842a27b | 1470 | (Lisp_Object arg) |
8489eb67 | 1471 | { |
c096ae4d | 1472 | Lisp_Object tmp; |
d311d28c | 1473 | ptrdiff_t orig_val, val; |
8489eb67 | 1474 | |
839966f3 KH |
1475 | if (NILP (arg)) |
1476 | XSETFASTINT (arg, 1); | |
1477 | else | |
1478 | CHECK_NUMBER (arg); | |
1479 | ||
1480 | val = orig_val = scan_words (PT, XINT (arg)); | |
2c6ea900 | 1481 | if (! orig_val) |
839966f3 | 1482 | val = XINT (arg) > 0 ? ZV : BEGV; |
5878ee6f | 1483 | |
b8855607 | 1484 | /* Avoid jumping out of an input field. */ |
c096ae4d SM |
1485 | tmp = Fconstrain_to_field (make_number (val), make_number (PT), |
1486 | Qt, Qnil, Qnil); | |
1487 | val = XFASTINT (tmp); | |
7d0393cf | 1488 | |
8489eb67 | 1489 | SET_PT (val); |
e6d8341f | 1490 | return val == orig_val ? Qt : Qnil; |
8489eb67 RS |
1491 | } |
1492 | \f | |
a7ca3326 | 1493 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, |
fdb82f93 PJ |
1494 | doc: /* Move point forward, stopping before a char not in STRING, or at pos LIM. |
1495 | STRING is like the inside of a `[...]' in a regular expression | |
1496 | except that `]' is never special and `\\' quotes `^', `-' or `\\' | |
7087d5e9 | 1497 | (but not at the end of a range; quoting is never needed there). |
fdb82f93 PJ |
1498 | Thus, with arg "a-zA-Z", this skips letters stopping before first nonletter. |
1499 | With arg "^a-zA-Z", skips nonletters stopping before first letter. | |
a1bc88d4 RS |
1500 | Char classes, e.g. `[:alpha:]', are supported. |
1501 | ||
1502 | Returns the distance traveled, either zero or positive. */) | |
5842a27b | 1503 | (Lisp_Object string, Lisp_Object lim) |
195d1361 | 1504 | { |
327719ee | 1505 | return skip_chars (1, string, lim, 1); |
195d1361 RS |
1506 | } |
1507 | ||
a7ca3326 | 1508 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, |
fdb82f93 PJ |
1509 | doc: /* Move point backward, stopping after a char not in STRING, or at pos LIM. |
1510 | See `skip-chars-forward' for details. | |
1511 | Returns the distance traveled, either zero or negative. */) | |
5842a27b | 1512 | (Lisp_Object string, Lisp_Object lim) |
195d1361 | 1513 | { |
327719ee | 1514 | return skip_chars (0, string, lim, 1); |
195d1361 RS |
1515 | } |
1516 | ||
1517 | DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0, | |
fdb82f93 PJ |
1518 | doc: /* Move point forward across chars in specified syntax classes. |
1519 | SYNTAX is a string of syntax code characters. | |
1520 | Stop before a char whose syntax is not in SYNTAX, or at position LIM. | |
1521 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1522 | This function returns the distance traveled, either zero or positive. */) | |
5842a27b | 1523 | (Lisp_Object syntax, Lisp_Object lim) |
195d1361 | 1524 | { |
b7dbcc19 | 1525 | return skip_syntaxes (1, syntax, lim); |
195d1361 RS |
1526 | } |
1527 | ||
1528 | DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0, | |
fdb82f93 PJ |
1529 | doc: /* Move point backward across chars in specified syntax classes. |
1530 | SYNTAX is a string of syntax code characters. | |
1531 | Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM. | |
1532 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1533 | This function returns the distance traveled, either zero or negative. */) | |
5842a27b | 1534 | (Lisp_Object syntax, Lisp_Object lim) |
195d1361 | 1535 | { |
b7dbcc19 | 1536 | return skip_syntaxes (0, syntax, lim); |
195d1361 RS |
1537 | } |
1538 | ||
6a140a74 | 1539 | static Lisp_Object |
1fc71008 PE |
1540 | skip_chars (bool forwardp, Lisp_Object string, Lisp_Object lim, |
1541 | bool handle_iso_classes) | |
195d1361 | 1542 | { |
1fc71008 PE |
1543 | int c; |
1544 | char fastmap[0400]; | |
b7dbcc19 | 1545 | /* Store the ranges of non-ASCII characters. */ |
4f63c6bb | 1546 | int *char_ranges IF_LINT (= NULL); |
7e68b0ea | 1547 | int n_char_ranges = 0; |
1fc71008 PE |
1548 | bool negate = 0; |
1549 | ptrdiff_t i, i_byte; | |
1550 | /* True if the current buffer is multibyte and the region contains | |
1551 | non-ASCII chars. */ | |
1552 | bool multibyte; | |
1553 | /* True if STRING is multibyte and it contains non-ASCII chars. */ | |
1554 | bool string_multibyte; | |
d311d28c | 1555 | ptrdiff_t size_byte; |
2e567bd3 | 1556 | const unsigned char *str; |
82d497fc | 1557 | int len; |
a1bc88d4 | 1558 | Lisp_Object iso_classes; |
195d1361 | 1559 | |
b7826503 | 1560 | CHECK_STRING (string); |
a1bc88d4 | 1561 | iso_classes = Qnil; |
82d497fc | 1562 | |
195d1361 RS |
1563 | if (NILP (lim)) |
1564 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1565 | else | |
b7826503 | 1566 | CHECK_NUMBER_COERCE_MARKER (lim); |
195d1361 RS |
1567 | |
1568 | /* In any case, don't allow scan outside bounds of buffer. */ | |
195d1361 RS |
1569 | if (XINT (lim) > ZV) |
1570 | XSETFASTINT (lim, ZV); | |
1571 | if (XINT (lim) < BEGV) | |
1572 | XSETFASTINT (lim, BEGV); | |
1573 | ||
4b4deea2 | 1574 | multibyte = (!NILP (BVAR (current_buffer, enable_multibyte_characters)) |
92eaa22e | 1575 | && (XINT (lim) - PT != CHAR_TO_BYTE (XINT (lim)) - PT_BYTE)); |
8f924df7 | 1576 | string_multibyte = SBYTES (string) > SCHARS (string); |
b7dbcc19 | 1577 | |
72af86bd | 1578 | memset (fastmap, 0, sizeof fastmap); |
195d1361 | 1579 | |
8f924df7 KH |
1580 | str = SDATA (string); |
1581 | size_byte = SBYTES (string); | |
4101e6fe | 1582 | |
82d497fc | 1583 | i_byte = 0; |
13090112 | 1584 | if (i_byte < size_byte |
d5db4077 | 1585 | && SREF (string, 0) == '^') |
195d1361 | 1586 | { |
82d497fc | 1587 | negate = 1; i_byte++; |
195d1361 RS |
1588 | } |
1589 | ||
1590 | /* Find the characters specified and set their elements of fastmap. | |
b7dbcc19 | 1591 | Handle backslashes and ranges specially. |
195d1361 | 1592 | |
b7dbcc19 KH |
1593 | If STRING contains non-ASCII characters, setup char_ranges for |
1594 | them and use fastmap only for their leading codes. */ | |
4101e6fe | 1595 | |
b7dbcc19 | 1596 | if (! string_multibyte) |
195d1361 | 1597 | { |
1fc71008 | 1598 | bool string_has_eight_bit = 0; |
4101e6fe | 1599 | |
b7dbcc19 KH |
1600 | /* At first setup fastmap. */ |
1601 | while (i_byte < size_byte) | |
1602 | { | |
1603 | c = str[i_byte++]; | |
1604 | ||
a1bc88d4 RS |
1605 | if (handle_iso_classes && c == '[' |
1606 | && i_byte < size_byte | |
327719ee | 1607 | && str[i_byte] == ':') |
a1bc88d4 RS |
1608 | { |
1609 | const unsigned char *class_beg = str + i_byte + 1; | |
1610 | const unsigned char *class_end = class_beg; | |
b3bda4fd | 1611 | const unsigned char *class_limit = str + size_byte - 2; |
db9cd97a | 1612 | /* Leave room for the null. */ |
a1bc88d4 RS |
1613 | unsigned char class_name[CHAR_CLASS_MAX_LENGTH + 1]; |
1614 | re_wctype_t cc; | |
1615 | ||
1616 | if (class_limit - class_beg > CHAR_CLASS_MAX_LENGTH) | |
1617 | class_limit = class_beg + CHAR_CLASS_MAX_LENGTH; | |
1618 | ||
b3bda4fd KS |
1619 | while (class_end < class_limit |
1620 | && *class_end >= 'a' && *class_end <= 'z') | |
a1bc88d4 RS |
1621 | class_end++; |
1622 | ||
b3bda4fd KS |
1623 | if (class_end == class_beg |
1624 | || *class_end != ':' || class_end[1] != ']') | |
1625 | goto not_a_class_name; | |
a1bc88d4 | 1626 | |
72af86bd | 1627 | memcpy (class_name, class_beg, class_end - class_beg); |
a1bc88d4 RS |
1628 | class_name[class_end - class_beg] = 0; |
1629 | ||
1630 | cc = re_wctype (class_name); | |
1631 | if (cc == 0) | |
1632 | error ("Invalid ISO C character class"); | |
1633 | ||
1634 | iso_classes = Fcons (make_number (cc), iso_classes); | |
1635 | ||
1636 | i_byte = class_end + 2 - str; | |
1637 | continue; | |
1638 | } | |
1639 | ||
b3bda4fd | 1640 | not_a_class_name: |
b7dbcc19 KH |
1641 | if (c == '\\') |
1642 | { | |
13090112 | 1643 | if (i_byte == size_byte) |
4101e6fe RS |
1644 | break; |
1645 | ||
5c7b02ab | 1646 | c = str[i_byte++]; |
195d1361 | 1647 | } |
839966f3 KH |
1648 | /* Treat `-' as range character only if another character |
1649 | follows. */ | |
1650 | if (i_byte + 1 < size_byte | |
82d497fc | 1651 | && str[i_byte] == '-') |
195d1361 | 1652 | { |
1fc71008 | 1653 | int c2; |
4101e6fe RS |
1654 | |
1655 | /* Skip over the dash. */ | |
82d497fc | 1656 | i_byte++; |
4101e6fe | 1657 | |
4101e6fe | 1658 | /* Get the end of the range. */ |
5c7b02ab | 1659 | c2 = str[i_byte++]; |
b7dbcc19 KH |
1660 | if (c2 == '\\' |
1661 | && i_byte < size_byte) | |
1662 | c2 = str[i_byte++]; | |
1663 | ||
8f924df7 KH |
1664 | if (c <= c2) |
1665 | { | |
1fc71008 | 1666 | int lim2 = c2 + 1; |
1e69125e | 1667 | while (c < lim2) |
8f924df7 KH |
1668 | fastmap[c++] = 1; |
1669 | if (! ASCII_CHAR_P (c2)) | |
1670 | string_has_eight_bit = 1; | |
1671 | } | |
195d1361 RS |
1672 | } |
1673 | else | |
b7dbcc19 KH |
1674 | { |
1675 | fastmap[c] = 1; | |
1676 | if (! ASCII_CHAR_P (c)) | |
1677 | string_has_eight_bit = 1; | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | /* If the current range is multibyte and STRING contains | |
1682 | eight-bit chars, arrange fastmap and setup char_ranges for | |
1683 | the corresponding multibyte chars. */ | |
1684 | if (multibyte && string_has_eight_bit) | |
1685 | { | |
178ba3e6 PE |
1686 | char *p1; |
1687 | char himap[0200 + 1]; | |
1688 | memcpy (himap, fastmap + 0200, 0200); | |
1689 | himap[0200] = 0; | |
72af86bd | 1690 | memset (fastmap + 0200, 0, 0200); |
38182d90 | 1691 | char_ranges = alloca (sizeof *char_ranges * 128 * 2); |
178ba3e6 PE |
1692 | i = 0; |
1693 | ||
1694 | while ((p1 = memchr (himap + i, 1, 0200 - i))) | |
b7dbcc19 | 1695 | { |
178ba3e6 PE |
1696 | /* Deduce the next range C..C2 from the next clump of 1s |
1697 | in HIMAP starting with &HIMAP[I]. HIMAP is the high | |
1698 | order half of the old FASTMAP. */ | |
1699 | int c2, leading_code; | |
1700 | i = p1 - himap; | |
1701 | c = BYTE8_TO_CHAR (i + 0200); | |
1702 | i += strlen (p1); | |
1703 | c2 = BYTE8_TO_CHAR (i + 0200 - 1); | |
1704 | ||
1705 | char_ranges[n_char_ranges++] = c; | |
1706 | char_ranges[n_char_ranges++] = c2; | |
1707 | leading_code = CHAR_LEADING_CODE (c); | |
1708 | memset (fastmap + leading_code, 1, | |
1709 | CHAR_LEADING_CODE (c2) - leading_code + 1); | |
b7dbcc19 | 1710 | } |
195d1361 RS |
1711 | } |
1712 | } | |
f003ca54 | 1713 | else /* STRING is multibyte */ |
b7dbcc19 | 1714 | { |
38182d90 | 1715 | char_ranges = alloca (sizeof *char_ranges * SCHARS (string) * 2); |
f003ca54 | 1716 | |
b7dbcc19 | 1717 | while (i_byte < size_byte) |
195d1361 | 1718 | { |
1fc71008 | 1719 | int leading_code = str[i_byte]; |
62a6e103 | 1720 | c = STRING_CHAR_AND_LENGTH (str + i_byte, len); |
b7dbcc19 | 1721 | i_byte += len; |
5c7b02ab | 1722 | |
327719ee MB |
1723 | if (handle_iso_classes && c == '[' |
1724 | && i_byte < size_byte | |
62a6e103 | 1725 | && STRING_CHAR (str + i_byte) == ':') |
327719ee MB |
1726 | { |
1727 | const unsigned char *class_beg = str + i_byte + 1; | |
1728 | const unsigned char *class_end = class_beg; | |
1729 | const unsigned char *class_limit = str + size_byte - 2; | |
1730 | /* Leave room for the null. */ | |
1731 | unsigned char class_name[CHAR_CLASS_MAX_LENGTH + 1]; | |
1732 | re_wctype_t cc; | |
1733 | ||
1734 | if (class_limit - class_beg > CHAR_CLASS_MAX_LENGTH) | |
1735 | class_limit = class_beg + CHAR_CLASS_MAX_LENGTH; | |
1736 | ||
1737 | while (class_end < class_limit | |
1738 | && *class_end >= 'a' && *class_end <= 'z') | |
1739 | class_end++; | |
1740 | ||
1741 | if (class_end == class_beg | |
1742 | || *class_end != ':' || class_end[1] != ']') | |
1743 | goto not_a_class_name_multibyte; | |
1744 | ||
72af86bd | 1745 | memcpy (class_name, class_beg, class_end - class_beg); |
327719ee MB |
1746 | class_name[class_end - class_beg] = 0; |
1747 | ||
1748 | cc = re_wctype (class_name); | |
1749 | if (cc == 0) | |
1750 | error ("Invalid ISO C character class"); | |
1751 | ||
1752 | iso_classes = Fcons (make_number (cc), iso_classes); | |
1753 | ||
1754 | i_byte = class_end + 2 - str; | |
1755 | continue; | |
1756 | } | |
1757 | ||
1758 | not_a_class_name_multibyte: | |
195d1361 RS |
1759 | if (c == '\\') |
1760 | { | |
13090112 | 1761 | if (i_byte == size_byte) |
4101e6fe RS |
1762 | break; |
1763 | ||
b7dbcc19 | 1764 | leading_code = str[i_byte]; |
62a6e103 | 1765 | c = STRING_CHAR_AND_LENGTH (str + i_byte, len); |
82d497fc | 1766 | i_byte += len; |
195d1361 | 1767 | } |
839966f3 KH |
1768 | /* Treat `-' as range character only if another character |
1769 | follows. */ | |
1770 | if (i_byte + 1 < size_byte | |
82d497fc | 1771 | && str[i_byte] == '-') |
195d1361 | 1772 | { |
1fc71008 | 1773 | int c2, leading_code2; |
4101e6fe RS |
1774 | |
1775 | /* Skip over the dash. */ | |
82d497fc | 1776 | i_byte++; |
4101e6fe | 1777 | |
4101e6fe | 1778 | /* Get the end of the range. */ |
b7dbcc19 | 1779 | leading_code2 = str[i_byte]; |
62a6e103 | 1780 | c2 = STRING_CHAR_AND_LENGTH (str + i_byte, len); |
82d497fc | 1781 | i_byte += len; |
7e68b0ea | 1782 | |
b7dbcc19 KH |
1783 | if (c2 == '\\' |
1784 | && i_byte < size_byte) | |
1785 | { | |
1786 | leading_code2 = str[i_byte]; | |
1fc71008 | 1787 | c2 = STRING_CHAR_AND_LENGTH (str + i_byte, len); |
b7dbcc19 KH |
1788 | i_byte += len; |
1789 | } | |
1790 | ||
f003ca54 KH |
1791 | if (c > c2) |
1792 | continue; | |
b7dbcc19 | 1793 | if (ASCII_CHAR_P (c)) |
06274af5 | 1794 | { |
5c7b02ab KH |
1795 | while (c <= c2 && c < 0x80) |
1796 | fastmap[c++] = 1; | |
b7dbcc19 KH |
1797 | leading_code = CHAR_LEADING_CODE (c); |
1798 | } | |
1799 | if (! ASCII_CHAR_P (c)) | |
1800 | { | |
1fc71008 | 1801 | int lim2 = leading_code2 + 1; |
1e69125e | 1802 | while (leading_code < lim2) |
b7dbcc19 KH |
1803 | fastmap[leading_code++] = 1; |
1804 | if (c <= c2) | |
e39091b6 | 1805 | { |
b7dbcc19 | 1806 | char_ranges[n_char_ranges++] = c; |
e39091b6 | 1807 | char_ranges[n_char_ranges++] = c2; |
06274af5 KH |
1808 | } |
1809 | } | |
195d1361 RS |
1810 | } |
1811 | else | |
7e68b0ea | 1812 | { |
b7dbcc19 | 1813 | if (ASCII_CHAR_P (c)) |
e39091b6 KH |
1814 | fastmap[c] = 1; |
1815 | else | |
7e68b0ea | 1816 | { |
b7dbcc19 | 1817 | fastmap[leading_code] = 1; |
4101e6fe RS |
1818 | char_ranges[n_char_ranges++] = c; |
1819 | char_ranges[n_char_ranges++] = c; | |
7e68b0ea RS |
1820 | } |
1821 | } | |
195d1361 | 1822 | } |
b7dbcc19 KH |
1823 | |
1824 | /* If the current range is unibyte and STRING contains non-ASCII | |
1825 | chars, arrange fastmap for the corresponding unibyte | |
1826 | chars. */ | |
1827 | ||
1828 | if (! multibyte && n_char_ranges > 0) | |
1829 | { | |
72af86bd | 1830 | memset (fastmap + 0200, 0, 0200); |
b7dbcc19 KH |
1831 | for (i = 0; i < n_char_ranges; i += 2) |
1832 | { | |
1833 | int c1 = char_ranges[i]; | |
1fc71008 | 1834 | int lim2 = char_ranges[i + 1] + 1; |
b7dbcc19 | 1835 | |
1e69125e | 1836 | for (; c1 < lim2; c1++) |
2afc21f5 SM |
1837 | { |
1838 | int b = CHAR_TO_BYTE_SAFE (c1); | |
1839 | if (b >= 0) | |
1840 | fastmap[b] = 1; | |
1841 | } | |
b7dbcc19 KH |
1842 | } |
1843 | } | |
195d1361 RS |
1844 | } |
1845 | ||
9690d026 | 1846 | /* If ^ was the first character, complement the fastmap. */ |
195d1361 | 1847 | if (negate) |
b7dbcc19 KH |
1848 | { |
1849 | if (! multibyte) | |
1850 | for (i = 0; i < sizeof fastmap; i++) | |
1851 | fastmap[i] ^= 1; | |
1852 | else | |
1853 | { | |
1854 | for (i = 0; i < 0200; i++) | |
1855 | fastmap[i] ^= 1; | |
1856 | /* All non-ASCII chars possibly match. */ | |
1857 | for (; i < sizeof fastmap; i++) | |
1858 | fastmap[i] = 1; | |
1859 | } | |
1860 | } | |
195d1361 RS |
1861 | |
1862 | { | |
d311d28c PE |
1863 | ptrdiff_t start_point = PT; |
1864 | ptrdiff_t pos = PT; | |
1865 | ptrdiff_t pos_byte = PT_BYTE; | |
9af7511a KH |
1866 | unsigned char *p = PT_ADDR, *endp, *stop; |
1867 | ||
1868 | if (forwardp) | |
1869 | { | |
1870 | endp = (XINT (lim) == GPT) ? GPT_ADDR : CHAR_POS_ADDR (XINT (lim)); | |
d7ee9fab | 1871 | stop = (pos < GPT && GPT < XINT (lim)) ? GPT_ADDR : endp; |
9af7511a KH |
1872 | } |
1873 | else | |
1874 | { | |
1875 | endp = CHAR_POS_ADDR (XINT (lim)); | |
d7ee9fab | 1876 | stop = (pos >= GPT && GPT > XINT (lim)) ? GAP_END_ADDR : endp; |
9af7511a | 1877 | } |
195d1361 RS |
1878 | |
1879 | immediate_quit = 1; | |
45b683a1 | 1880 | /* This code may look up syntax tables using functions that rely on the |
618db430 SM |
1881 | gl_state object. To make sure this object is not out of date, |
1882 | let's initialize it manually. | |
1883 | We ignore syntax-table text-properties for now, since that's | |
1884 | what we've done in the past. */ | |
d48cd3f4 | 1885 | SETUP_BUFFER_SYNTAX_TABLE (); |
b7dbcc19 | 1886 | if (forwardp) |
195d1361 | 1887 | { |
b7dbcc19 | 1888 | if (multibyte) |
8f924df7 | 1889 | while (1) |
b7dbcc19 | 1890 | { |
8f924df7 | 1891 | int nbytes; |
9af7511a | 1892 | |
8f924df7 | 1893 | if (p >= stop) |
9af7511a | 1894 | { |
8f924df7 | 1895 | if (p >= endp) |
9af7511a | 1896 | break; |
8f924df7 KH |
1897 | p = GAP_END_ADDR; |
1898 | stop = endp; | |
9af7511a | 1899 | } |
62a6e103 | 1900 | c = STRING_CHAR_AND_LENGTH (p, nbytes); |
327719ee | 1901 | if (! NILP (iso_classes) && in_classes (c, iso_classes)) |
9af7511a | 1902 | { |
327719ee | 1903 | if (negate) |
9af7511a | 1904 | break; |
327719ee MB |
1905 | else |
1906 | goto fwd_ok; | |
9af7511a | 1907 | } |
9af7511a | 1908 | |
8f924df7 | 1909 | if (! fastmap[*p]) |
b7dbcc19 KH |
1910 | break; |
1911 | if (! ASCII_CHAR_P (c)) | |
9af7511a | 1912 | { |
b7dbcc19 KH |
1913 | /* As we are looking at a multibyte character, we |
1914 | must look up the character in the table | |
1915 | CHAR_RANGES. If there's no data in the table, | |
1916 | that character is not what we want to skip. */ | |
1917 | ||
1918 | /* The following code do the right thing even if | |
1919 | n_char_ranges is zero (i.e. no data in | |
1920 | CHAR_RANGES). */ | |
1921 | for (i = 0; i < n_char_ranges; i += 2) | |
1922 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
9af7511a | 1923 | break; |
b7dbcc19 KH |
1924 | if (!(negate ^ (i < n_char_ranges))) |
1925 | break; | |
9af7511a | 1926 | } |
327719ee | 1927 | fwd_ok: |
8f924df7 | 1928 | p += nbytes, pos++, pos_byte += nbytes; |
b7dbcc19 KH |
1929 | } |
1930 | else | |
8f924df7 KH |
1931 | while (1) |
1932 | { | |
1933 | if (p >= stop) | |
9af7511a | 1934 | { |
8f924df7 | 1935 | if (p >= endp) |
9af7511a | 1936 | break; |
8f924df7 KH |
1937 | p = GAP_END_ADDR; |
1938 | stop = endp; | |
9af7511a | 1939 | } |
327719ee MB |
1940 | |
1941 | if (!NILP (iso_classes) && in_classes (*p, iso_classes)) | |
1942 | { | |
1943 | if (negate) | |
1944 | break; | |
1945 | else | |
1946 | goto fwd_unibyte_ok; | |
1947 | } | |
1948 | ||
8f924df7 KH |
1949 | if (!fastmap[*p]) |
1950 | break; | |
327719ee | 1951 | fwd_unibyte_ok: |
8f924df7 KH |
1952 | p++, pos++, pos_byte++; |
1953 | } | |
195d1361 RS |
1954 | } |
1955 | else | |
1956 | { | |
b7dbcc19 | 1957 | if (multibyte) |
8f924df7 | 1958 | while (1) |
b7dbcc19 | 1959 | { |
8f924df7 | 1960 | unsigned char *prev_p; |
9af7511a | 1961 | |
8f924df7 | 1962 | if (p <= stop) |
9af7511a | 1963 | { |
8f924df7 | 1964 | if (p <= endp) |
9af7511a | 1965 | break; |
8f924df7 KH |
1966 | p = GPT_ADDR; |
1967 | stop = endp; | |
9af7511a | 1968 | } |
8f924df7 KH |
1969 | prev_p = p; |
1970 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
62a6e103 | 1971 | c = STRING_CHAR (p); |
a1bc88d4 | 1972 | |
327719ee MB |
1973 | if (! NILP (iso_classes) && in_classes (c, iso_classes)) |
1974 | { | |
1975 | if (negate) | |
1976 | break; | |
9690d026 | 1977 | else |
327719ee | 1978 | goto back_ok; |
7e68b0ea | 1979 | } |
a1bc88d4 | 1980 | |
8f924df7 | 1981 | if (! fastmap[*p]) |
b7dbcc19 KH |
1982 | break; |
1983 | if (! ASCII_CHAR_P (c)) | |
7e68b0ea | 1984 | { |
b7dbcc19 KH |
1985 | /* See the comment in the previous similar code. */ |
1986 | for (i = 0; i < n_char_ranges; i += 2) | |
1987 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
1988 | break; | |
1989 | if (!(negate ^ (i < n_char_ranges))) | |
1990 | break; | |
7e68b0ea | 1991 | } |
327719ee | 1992 | back_ok: |
8f924df7 | 1993 | pos--, pos_byte -= prev_p - p; |
b7dbcc19 KH |
1994 | } |
1995 | else | |
8f924df7 KH |
1996 | while (1) |
1997 | { | |
1998 | if (p <= stop) | |
9af7511a | 1999 | { |
8f924df7 | 2000 | if (p <= endp) |
9af7511a | 2001 | break; |
8f924df7 KH |
2002 | p = GPT_ADDR; |
2003 | stop = endp; | |
9af7511a | 2004 | } |
e39091b6 | 2005 | |
327719ee MB |
2006 | if (! NILP (iso_classes) && in_classes (p[-1], iso_classes)) |
2007 | { | |
2008 | if (negate) | |
2009 | break; | |
9af7511a | 2010 | else |
327719ee MB |
2011 | goto back_unibyte_ok; |
2012 | } | |
a1bc88d4 | 2013 | |
8f924df7 KH |
2014 | if (!fastmap[p[-1]]) |
2015 | break; | |
327719ee | 2016 | back_unibyte_ok: |
8f924df7 KH |
2017 | p--, pos--, pos_byte--; |
2018 | } | |
195d1361 | 2019 | } |
7e68b0ea | 2020 | |
b7dbcc19 KH |
2021 | SET_PT_BOTH (pos, pos_byte); |
2022 | immediate_quit = 0; | |
2023 | ||
2024 | return make_number (PT - start_point); | |
2025 | } | |
2026 | } | |
7e68b0ea | 2027 | |
b7dbcc19 KH |
2028 | |
2029 | static Lisp_Object | |
1fc71008 | 2030 | skip_syntaxes (bool forwardp, Lisp_Object string, Lisp_Object lim) |
b7dbcc19 | 2031 | { |
1fc71008 | 2032 | int c; |
b7dbcc19 | 2033 | unsigned char fastmap[0400]; |
1fc71008 PE |
2034 | bool negate = 0; |
2035 | ptrdiff_t i, i_byte; | |
2036 | bool multibyte; | |
d311d28c | 2037 | ptrdiff_t size_byte; |
b7dbcc19 KH |
2038 | unsigned char *str; |
2039 | ||
2040 | CHECK_STRING (string); | |
2041 | ||
2042 | if (NILP (lim)) | |
2043 | XSETINT (lim, forwardp ? ZV : BEGV); | |
2044 | else | |
2045 | CHECK_NUMBER_COERCE_MARKER (lim); | |
2046 | ||
2047 | /* In any case, don't allow scan outside bounds of buffer. */ | |
2048 | if (XINT (lim) > ZV) | |
2049 | XSETFASTINT (lim, ZV); | |
2050 | if (XINT (lim) < BEGV) | |
2051 | XSETFASTINT (lim, BEGV); | |
2052 | ||
ade8ee9e | 2053 | if (forwardp ? (PT >= XFASTINT (lim)) : (PT <= XFASTINT (lim))) |
49feb1cd | 2054 | return make_number (0); |
8c6e735b | 2055 | |
4b4deea2 | 2056 | multibyte = (!NILP (BVAR (current_buffer, enable_multibyte_characters)) |
92eaa22e | 2057 | && (XINT (lim) - PT != CHAR_TO_BYTE (XINT (lim)) - PT_BYTE)); |
b7dbcc19 | 2058 | |
72af86bd | 2059 | memset (fastmap, 0, sizeof fastmap); |
b7dbcc19 | 2060 | |
8f924df7 KH |
2061 | if (SBYTES (string) > SCHARS (string)) |
2062 | /* As this is very rare case (syntax spec is ASCII only), don't | |
2063 | consider efficiency. */ | |
bc796a59 KH |
2064 | string = string_make_unibyte (string); |
2065 | ||
8f924df7 KH |
2066 | str = SDATA (string); |
2067 | size_byte = SBYTES (string); | |
bc796a59 | 2068 | |
b7dbcc19 KH |
2069 | i_byte = 0; |
2070 | if (i_byte < size_byte | |
8f924df7 | 2071 | && SREF (string, 0) == '^') |
b7dbcc19 KH |
2072 | { |
2073 | negate = 1; i_byte++; | |
2074 | } | |
2075 | ||
b7dbcc19 KH |
2076 | /* Find the syntaxes specified and set their elements of fastmap. */ |
2077 | ||
2078 | while (i_byte < size_byte) | |
2079 | { | |
2080 | c = str[i_byte++]; | |
8f924df7 | 2081 | fastmap[syntax_spec_code[c]] = 1; |
b7dbcc19 | 2082 | } |
195d1361 | 2083 | |
9690d026 | 2084 | /* If ^ was the first character, complement the fastmap. */ |
195d1361 RS |
2085 | if (negate) |
2086 | for (i = 0; i < sizeof fastmap; i++) | |
9690d026 | 2087 | fastmap[i] ^= 1; |
195d1361 RS |
2088 | |
2089 | { | |
d311d28c PE |
2090 | ptrdiff_t start_point = PT; |
2091 | ptrdiff_t pos = PT; | |
2092 | ptrdiff_t pos_byte = PT_BYTE; | |
8f924df7 KH |
2093 | unsigned char *p = PT_ADDR, *endp, *stop; |
2094 | ||
2095 | if (forwardp) | |
2096 | { | |
2097 | endp = (XINT (lim) == GPT) ? GPT_ADDR : CHAR_POS_ADDR (XINT (lim)); | |
2098 | stop = (pos < GPT && GPT < XINT (lim)) ? GPT_ADDR : endp; | |
2099 | } | |
2100 | else | |
2101 | { | |
2102 | endp = CHAR_POS_ADDR (XINT (lim)); | |
2103 | stop = (pos >= GPT && GPT > XINT (lim)) ? GAP_END_ADDR : endp; | |
2104 | } | |
195d1361 RS |
2105 | |
2106 | immediate_quit = 1; | |
b7dbcc19 KH |
2107 | SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1); |
2108 | if (forwardp) | |
195d1361 | 2109 | { |
b7dbcc19 | 2110 | if (multibyte) |
195d1361 | 2111 | { |
8f924df7 | 2112 | while (1) |
8c6e735b | 2113 | { |
8f924df7 KH |
2114 | int nbytes; |
2115 | ||
2116 | if (p >= stop) | |
2117 | { | |
2118 | if (p >= endp) | |
2119 | break; | |
2120 | p = GAP_END_ADDR; | |
2121 | stop = endp; | |
2122 | } | |
62a6e103 | 2123 | c = STRING_CHAR_AND_LENGTH (p, nbytes); |
1fc71008 | 2124 | if (! fastmap[SYNTAX (c)]) |
8c6e735b | 2125 | break; |
8f924df7 | 2126 | p += nbytes, pos++, pos_byte += nbytes; |
8c6e735b KH |
2127 | UPDATE_SYNTAX_TABLE_FORWARD (pos); |
2128 | } | |
195d1361 RS |
2129 | } |
2130 | else | |
2131 | { | |
8c6e735b | 2132 | while (1) |
7e68b0ea | 2133 | { |
8f924df7 KH |
2134 | if (p >= stop) |
2135 | { | |
2136 | if (p >= endp) | |
2137 | break; | |
2138 | p = GAP_END_ADDR; | |
2139 | stop = endp; | |
2140 | } | |
1fc71008 | 2141 | if (! fastmap[SYNTAX (*p)]) |
8c6e735b | 2142 | break; |
8f924df7 | 2143 | p++, pos++, pos_byte++; |
b7dbcc19 | 2144 | UPDATE_SYNTAX_TABLE_FORWARD (pos); |
195d1361 RS |
2145 | } |
2146 | } | |
2147 | } | |
2148 | else | |
2149 | { | |
b7dbcc19 | 2150 | if (multibyte) |
195d1361 | 2151 | { |
8c6e735b | 2152 | while (1) |
b7dbcc19 | 2153 | { |
8f924df7 KH |
2154 | unsigned char *prev_p; |
2155 | ||
2156 | if (p <= stop) | |
b7dbcc19 | 2157 | { |
8f924df7 KH |
2158 | if (p <= endp) |
2159 | break; | |
2160 | p = GPT_ADDR; | |
2161 | stop = endp; | |
b7dbcc19 | 2162 | } |
262be72a | 2163 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
8f924df7 KH |
2164 | prev_p = p; |
2165 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
62a6e103 | 2166 | c = STRING_CHAR (p); |
1fc71008 | 2167 | if (! fastmap[SYNTAX (c)]) |
8f924df7 KH |
2168 | break; |
2169 | pos--, pos_byte -= prev_p - p; | |
b7dbcc19 | 2170 | } |
195d1361 RS |
2171 | } |
2172 | else | |
2173 | { | |
8c6e735b KH |
2174 | while (1) |
2175 | { | |
8f924df7 KH |
2176 | if (p <= stop) |
2177 | { | |
2178 | if (p <= endp) | |
2179 | break; | |
2180 | p = GPT_ADDR; | |
2181 | stop = endp; | |
2182 | } | |
102f6132 | 2183 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
1fc71008 | 2184 | if (! fastmap[SYNTAX (p[-1])]) |
8c6e735b | 2185 | break; |
8f924df7 | 2186 | p--, pos--, pos_byte--; |
8c6e735b | 2187 | } |
195d1361 RS |
2188 | } |
2189 | } | |
6a140a74 RS |
2190 | |
2191 | SET_PT_BOTH (pos, pos_byte); | |
195d1361 RS |
2192 | immediate_quit = 0; |
2193 | ||
2194 | return make_number (PT - start_point); | |
2195 | } | |
2196 | } | |
a1bc88d4 | 2197 | |
1fc71008 | 2198 | /* Return true if character C belongs to one of the ISO classes |
a1bc88d4 RS |
2199 | in the list ISO_CLASSES. Each class is represented by an |
2200 | integer which is its type according to re_wctype. */ | |
2201 | ||
1fc71008 | 2202 | static bool |
971de7fb | 2203 | in_classes (int c, Lisp_Object iso_classes) |
a1bc88d4 | 2204 | { |
1fc71008 | 2205 | bool fits_class = 0; |
a1bc88d4 | 2206 | |
618db430 | 2207 | while (CONSP (iso_classes)) |
a1bc88d4 RS |
2208 | { |
2209 | Lisp_Object elt; | |
2210 | elt = XCAR (iso_classes); | |
2211 | iso_classes = XCDR (iso_classes); | |
2212 | ||
2213 | if (re_iswctype (c, XFASTINT (elt))) | |
2214 | fits_class = 1; | |
2215 | } | |
2216 | ||
2217 | return fits_class; | |
2218 | } | |
195d1361 | 2219 | \f |
95ff8dfc RS |
2220 | /* Jump over a comment, assuming we are at the beginning of one. |
2221 | FROM is the current position. | |
2222 | FROM_BYTE is the bytepos corresponding to FROM. | |
2223 | Do not move past STOP (a charpos). | |
2224 | The comment over which we have to jump is of style STYLE | |
1fc71008 | 2225 | (either SYNTAX_FLAGS_COMMENT_STYLE (foo) or ST_COMMENT_STYLE). |
95ff8dfc RS |
2226 | NESTING should be positive to indicate the nesting at the beginning |
2227 | for nested comments and should be zero or negative else. | |
2228 | ST_COMMENT_STYLE cannot be nested. | |
2229 | PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character | |
2230 | (or 0 If the search cannot start in the middle of a two-character). | |
2231 | ||
1fc71008 | 2232 | If successful, return true and store the charpos of the comment's end |
95ff8dfc | 2233 | into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR. |
1fc71008 | 2234 | Else, return false and store the charpos STOP into *CHARPOS_PTR, the |
95ff8dfc RS |
2235 | corresponding bytepos into *BYTEPOS_PTR and the current nesting |
2236 | (as defined for state.incomment) in *INCOMMENT_PTR. | |
2237 | ||
2238 | The comment end is the last character of the comment rather than the | |
1fc71008 | 2239 | character just after the comment. |
95ff8dfc RS |
2240 | |
2241 | Global syntax data is assumed to initially be valid for FROM and | |
2242 | remains valid for forward search starting at the returned position. */ | |
2243 | ||
1fc71008 | 2244 | static bool |
d311d28c PE |
2245 | forw_comment (ptrdiff_t from, ptrdiff_t from_byte, ptrdiff_t stop, |
2246 | EMACS_INT nesting, int style, int prev_syntax, | |
2247 | ptrdiff_t *charpos_ptr, ptrdiff_t *bytepos_ptr, | |
2248 | EMACS_INT *incomment_ptr) | |
95ff8dfc RS |
2249 | { |
2250 | register int c, c1; | |
2251 | register enum syntaxcode code; | |
c5683ceb | 2252 | register int syntax, other_syntax; |
95ff8dfc RS |
2253 | |
2254 | if (nesting <= 0) nesting = -1; | |
2255 | ||
2256 | /* Enter the loop in the middle so that we find | |
2257 | a 2-char comment ender if we start in the middle of it. */ | |
2258 | syntax = prev_syntax; | |
2259 | if (syntax != 0) goto forw_incomment; | |
2260 | ||
2261 | while (1) | |
2262 | { | |
2263 | if (from == stop) | |
2264 | { | |
2265 | *incomment_ptr = nesting; | |
2266 | *charpos_ptr = from; | |
2267 | *bytepos_ptr = from_byte; | |
2268 | return 0; | |
2269 | } | |
8f924df7 | 2270 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2271 | syntax = SYNTAX_WITH_FLAGS (c); |
2272 | code = syntax & 0xff; | |
2273 | if (code == Sendcomment | |
c5683ceb | 2274 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0) == style |
abf8a9ff SM |
2275 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) ? |
2276 | (nesting > 0 && --nesting == 0) : nesting < 0)) | |
95ff8dfc RS |
2277 | /* we have encountered a comment end of the same style |
2278 | as the comment sequence which began this comment | |
2279 | section */ | |
2280 | break; | |
2281 | if (code == Scomment_fence | |
2282 | && style == ST_COMMENT_STYLE) | |
2283 | /* we have encountered a comment end of the same style | |
2284 | as the comment sequence which began this comment | |
2285 | section. */ | |
2286 | break; | |
2287 | if (nesting > 0 | |
2288 | && code == Scomment | |
abf8a9ff | 2289 | && SYNTAX_FLAGS_COMMENT_NESTED (syntax) |
c5683ceb | 2290 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0) == style) |
95ff8dfc RS |
2291 | /* we have encountered a nested comment of the same style |
2292 | as the comment sequence which began this comment section */ | |
2293 | nesting++; | |
2294 | INC_BOTH (from, from_byte); | |
2295 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
7d0393cf | 2296 | |
95ff8dfc RS |
2297 | forw_incomment: |
2298 | if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
8f924df7 | 2299 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
c5683ceb SM |
2300 | other_syntax = SYNTAX_WITH_FLAGS (c1), |
2301 | SYNTAX_FLAGS_COMEND_SECOND (other_syntax)) | |
2302 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax, other_syntax) == style | |
abf8a9ff | 2303 | && ((SYNTAX_FLAGS_COMMENT_NESTED (syntax) || |
c5683ceb SM |
2304 | SYNTAX_FLAGS_COMMENT_NESTED (other_syntax)) |
2305 | ? nesting > 0 : nesting < 0)) | |
4ffe723b GM |
2306 | { |
2307 | if (--nesting <= 0) | |
2308 | /* we have encountered a comment end of the same style | |
2309 | as the comment sequence which began this comment | |
2310 | section */ | |
2311 | break; | |
2312 | else | |
2313 | { | |
2314 | INC_BOTH (from, from_byte); | |
2315 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2316 | } | |
2317 | } | |
95ff8dfc RS |
2318 | if (nesting > 0 |
2319 | && from < stop | |
2320 | && SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
8f924df7 | 2321 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
c5683ceb SM |
2322 | other_syntax = SYNTAX_WITH_FLAGS (c1), |
2323 | SYNTAX_FLAGS_COMMENT_STYLE (other_syntax, syntax) == style | |
2324 | && SYNTAX_FLAGS_COMSTART_SECOND (other_syntax)) | |
abf8a9ff | 2325 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) || |
c5683ceb | 2326 | SYNTAX_FLAGS_COMMENT_NESTED (other_syntax))) |
95ff8dfc RS |
2327 | /* we have encountered a nested comment of the same style |
2328 | as the comment sequence which began this comment | |
2329 | section */ | |
2330 | { | |
2331 | INC_BOTH (from, from_byte); | |
2332 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2333 | nesting++; | |
2334 | } | |
2335 | } | |
2336 | *charpos_ptr = from; | |
2337 | *bytepos_ptr = from_byte; | |
2338 | return 1; | |
2339 | } | |
2340 | ||
b3cfe0c8 | 2341 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
177c0ea7 | 2342 | doc: /* |
ee648c11 | 2343 | Move forward across up to COUNT comments. If COUNT is negative, move backward. |
fdb82f93 PJ |
2344 | Stop scanning if we find something other than a comment or whitespace. |
2345 | Set point to where scanning stops. | |
ee648c11 | 2346 | If COUNT comments are found as expected, with nothing except whitespace |
fdb82f93 | 2347 | between them, return t; otherwise return nil. */) |
5842a27b | 2348 | (Lisp_Object count) |
b3cfe0c8 | 2349 | { |
1fc71008 PE |
2350 | ptrdiff_t from, from_byte, stop; |
2351 | int c, c1; | |
2352 | enum syntaxcode code; | |
b3cfe0c8 | 2353 | int comstyle = 0; /* style of comment encountered */ |
1fc71008 PE |
2354 | bool comnested = 0; /* whether the comment is nestable or not */ |
2355 | bool found; | |
2312c580 | 2356 | EMACS_INT count1; |
d311d28c | 2357 | ptrdiff_t out_charpos, out_bytepos; |
7c85f529 | 2358 | EMACS_INT dummy; |
840f481c | 2359 | |
b7826503 | 2360 | CHECK_NUMBER (count); |
840f481c | 2361 | count1 = XINT (count); |
195d1361 | 2362 | stop = count1 > 0 ? ZV : BEGV; |
b3cfe0c8 RS |
2363 | |
2364 | immediate_quit = 1; | |
2365 | QUIT; | |
2366 | ||
2367 | from = PT; | |
6a140a74 | 2368 | from_byte = PT_BYTE; |
b3cfe0c8 | 2369 | |
195d1361 | 2370 | SETUP_SYNTAX_TABLE (from, count1); |
840f481c | 2371 | while (count1 > 0) |
b3cfe0c8 | 2372 | { |
04882296 | 2373 | do |
b3cfe0c8 | 2374 | { |
1fc71008 PE |
2375 | bool comstart_first; |
2376 | int syntax, other_syntax; | |
f902a008 | 2377 | |
04882296 KH |
2378 | if (from == stop) |
2379 | { | |
ef316cf0 | 2380 | SET_PT_BOTH (from, from_byte); |
b7e6e612 | 2381 | immediate_quit = 0; |
04882296 KH |
2382 | return Qnil; |
2383 | } | |
b7dbcc19 | 2384 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
c5683ceb | 2385 | syntax = SYNTAX_WITH_FLAGS (c); |
b3cfe0c8 | 2386 | code = SYNTAX (c); |
c5683ceb SM |
2387 | comstart_first = SYNTAX_FLAGS_COMSTART_FIRST (syntax); |
2388 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (syntax); | |
2389 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0); | |
6a140a74 | 2390 | INC_BOTH (from, from_byte); |
f902a008 | 2391 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2392 | if (from < stop && comstart_first |
b7dbcc19 | 2393 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
c5683ceb SM |
2394 | other_syntax = SYNTAX_WITH_FLAGS (c1), |
2395 | SYNTAX_FLAGS_COMSTART_SECOND (other_syntax))) | |
b3cfe0c8 | 2396 | { |
7d0393cf | 2397 | /* We have encountered a comment start sequence and we |
7fc8191e | 2398 | are ignoring all text inside comments. We must record |
b3cfe0c8 RS |
2399 | the comment style this sequence begins so that later, |
2400 | only a comment end of the same style actually ends | |
7fc8191e | 2401 | the comment section. */ |
b3cfe0c8 | 2402 | code = Scomment; |
c5683ceb | 2403 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (other_syntax, syntax); |
1fc71008 | 2404 | comnested |= SYNTAX_FLAGS_COMMENT_NESTED (other_syntax); |
6a140a74 | 2405 | INC_BOTH (from, from_byte); |
95ff8dfc | 2406 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 2407 | } |
04882296 | 2408 | } |
abf8a9ff | 2409 | while (code == Swhitespace || (code == Sendcomment && c == '\n')); |
6a140a74 | 2410 | |
da71ab91 KH |
2411 | if (code == Scomment_fence) |
2412 | comstyle = ST_COMMENT_STYLE; | |
2413 | else if (code != Scomment) | |
04882296 KH |
2414 | { |
2415 | immediate_quit = 0; | |
6a140a74 | 2416 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2417 | SET_PT_BOTH (from, from_byte); |
04882296 KH |
2418 | return Qnil; |
2419 | } | |
2420 | /* We're at the start of a comment. */ | |
95ff8dfc RS |
2421 | found = forw_comment (from, from_byte, stop, comnested, comstyle, 0, |
2422 | &out_charpos, &out_bytepos, &dummy); | |
2423 | from = out_charpos; from_byte = out_bytepos; | |
2424 | if (!found) | |
04882296 | 2425 | { |
95ff8dfc RS |
2426 | immediate_quit = 0; |
2427 | SET_PT_BOTH (from, from_byte); | |
2428 | return Qnil; | |
b3cfe0c8 | 2429 | } |
95ff8dfc RS |
2430 | INC_BOTH (from, from_byte); |
2431 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
04882296 | 2432 | /* We have skipped one comment. */ |
840f481c | 2433 | count1--; |
b3cfe0c8 RS |
2434 | } |
2435 | ||
840f481c | 2436 | while (count1 < 0) |
b3cfe0c8 | 2437 | { |
b9145dbb | 2438 | while (1) |
b3cfe0c8 | 2439 | { |
1fc71008 PE |
2440 | bool quoted; |
2441 | int syntax; | |
f902a008 | 2442 | |
b9145dbb RS |
2443 | if (from <= stop) |
2444 | { | |
6a140a74 | 2445 | SET_PT_BOTH (BEGV, BEGV_BYTE); |
b9145dbb RS |
2446 | immediate_quit = 0; |
2447 | return Qnil; | |
2448 | } | |
b3cfe0c8 | 2449 | |
6a140a74 | 2450 | DEC_BOTH (from, from_byte); |
f902a008 | 2451 | /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */ |
6a140a74 | 2452 | quoted = char_quoted (from, from_byte); |
b7dbcc19 | 2453 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
c5683ceb | 2454 | syntax = SYNTAX_WITH_FLAGS (c); |
b3cfe0c8 RS |
2455 | code = SYNTAX (c); |
2456 | comstyle = 0; | |
c5683ceb | 2457 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (syntax); |
7fc8191e | 2458 | if (code == Sendcomment) |
c5683ceb SM |
2459 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0); |
2460 | if (from > stop && SYNTAX_FLAGS_COMEND_SECOND (syntax) | |
f902a008 | 2461 | && prev_char_comend_first (from, from_byte) |
89c6809a | 2462 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
b3cfe0c8 | 2463 | { |
c5683ceb | 2464 | int other_syntax; |
7fc8191e | 2465 | /* We must record the comment style encountered so that |
b3cfe0c8 | 2466 | later, we can match only the proper comment begin |
7fc8191e | 2467 | sequence of the same style. */ |
6a140a74 | 2468 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2469 | code = Sendcomment; |
2470 | /* Calling char_quoted, above, set up global syntax position | |
2471 | at the new value of FROM. */ | |
b7dbcc19 | 2472 | c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
c5683ceb SM |
2473 | other_syntax = SYNTAX_WITH_FLAGS (c1); |
2474 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (other_syntax, syntax); | |
1fc71008 | 2475 | comnested |= SYNTAX_FLAGS_COMMENT_NESTED (other_syntax); |
b3cfe0c8 RS |
2476 | } |
2477 | ||
195d1361 RS |
2478 | if (code == Scomment_fence) |
2479 | { | |
2480 | /* Skip until first preceding unquoted comment_fence. */ | |
1fc71008 | 2481 | bool fence_found = 0; |
d311d28c | 2482 | ptrdiff_t ini = from, ini_byte = from_byte; |
7d0393cf | 2483 | |
6a140a74 | 2484 | while (1) |
195d1361 | 2485 | { |
6a140a74 | 2486 | DEC_BOTH (from, from_byte); |
195d1361 | 2487 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 2488 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
6a140a74 | 2489 | if (SYNTAX (c) == Scomment_fence |
7d0393cf | 2490 | && !char_quoted (from, from_byte)) |
195d1361 | 2491 | { |
01f44d5a | 2492 | fence_found = 1; |
195d1361 RS |
2493 | break; |
2494 | } | |
fcdd4585 SM |
2495 | else if (from == stop) |
2496 | break; | |
195d1361 | 2497 | } |
01f44d5a | 2498 | if (fence_found == 0) |
195d1361 RS |
2499 | { |
2500 | from = ini; /* Set point to ini + 1. */ | |
6a140a74 | 2501 | from_byte = ini_byte; |
195d1361 RS |
2502 | goto leave; |
2503 | } | |
39c41ad4 SM |
2504 | else |
2505 | /* We have skipped one comment. */ | |
2506 | break; | |
195d1361 RS |
2507 | } |
2508 | else if (code == Sendcomment) | |
b3cfe0c8 | 2509 | { |
95ff8dfc | 2510 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2511 | &out_charpos, &out_bytepos); |
1fc71008 | 2512 | if (!found) |
1aa963c8 | 2513 | { |
abf8a9ff SM |
2514 | if (c == '\n') |
2515 | /* This end-of-line is not an end-of-comment. | |
2516 | Treat it like a whitespace. | |
2517 | CC-mode (and maybe others) relies on this behavior. */ | |
2518 | ; | |
2519 | else | |
2520 | { | |
2521 | /* Failure: we should go back to the end of this | |
2522 | not-quite-endcomment. */ | |
c5683ceb | 2523 | if (SYNTAX (c) != code) |
abf8a9ff SM |
2524 | /* It was a two-char Sendcomment. */ |
2525 | INC_BOTH (from, from_byte); | |
2526 | goto leave; | |
2527 | } | |
1aa963c8 | 2528 | } |
2b927d02 | 2529 | else |
abf8a9ff SM |
2530 | { |
2531 | /* We have skipped one comment. */ | |
2532 | from = out_charpos, from_byte = out_bytepos; | |
2533 | break; | |
2534 | } | |
b3cfe0c8 | 2535 | } |
bb0de084 | 2536 | else if (code != Swhitespace || quoted) |
b3cfe0c8 | 2537 | { |
195d1361 | 2538 | leave: |
b3cfe0c8 | 2539 | immediate_quit = 0; |
6a140a74 | 2540 | INC_BOTH (from, from_byte); |
ef316cf0 | 2541 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2542 | return Qnil; |
2543 | } | |
2544 | } | |
2545 | ||
840f481c | 2546 | count1++; |
b3cfe0c8 RS |
2547 | } |
2548 | ||
ef316cf0 | 2549 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2550 | immediate_quit = 0; |
2551 | return Qt; | |
2552 | } | |
2553 | \f | |
b7dbcc19 | 2554 | /* Return syntax code of character C if C is an ASCII character |
45b683a1 | 2555 | or if MULTIBYTE_SYMBOL_P is false. Otherwise, return Ssymbol. */ |
bd25db08 | 2556 | |
45b683a1 PE |
2557 | static enum syntaxcode |
2558 | syntax_multibyte (int c, bool multibyte_symbol_p) | |
2559 | { | |
2560 | return ASCII_CHAR_P (c) || !multibyte_symbol_p ? SYNTAX (c) : Ssymbol; | |
2561 | } | |
bd25db08 | 2562 | |
6a140a74 | 2563 | static Lisp_Object |
1fc71008 | 2564 | scan_lists (EMACS_INT from, EMACS_INT count, EMACS_INT depth, bool sexpflag) |
8489eb67 RS |
2565 | { |
2566 | Lisp_Object val; | |
1fc71008 PE |
2567 | ptrdiff_t stop = count > 0 ? ZV : BEGV; |
2568 | int c, c1; | |
93da5fff | 2569 | int stringterm; |
1fc71008 PE |
2570 | bool quoted; |
2571 | bool mathexit = 0; | |
45b683a1 | 2572 | enum syntaxcode code; |
d311d28c | 2573 | EMACS_INT min_depth = depth; /* Err out if depth gets less than this. */ |
e5d4f4dc | 2574 | int comstyle = 0; /* style of comment encountered */ |
1fc71008 | 2575 | bool comnested = 0; /* whether the comment is nestable or not */ |
d311d28c | 2576 | ptrdiff_t temp_pos; |
932e6895 | 2577 | EMACS_INT last_good = from; |
1fc71008 | 2578 | bool found; |
d311d28c PE |
2579 | ptrdiff_t from_byte; |
2580 | ptrdiff_t out_bytepos, out_charpos; | |
7c85f529 | 2581 | EMACS_INT dummy; |
1fc71008 | 2582 | bool multibyte_symbol_p = sexpflag && multibyte_syntax_as_symbol; |
8489eb67 RS |
2583 | |
2584 | if (depth > 0) min_depth = 0; | |
2585 | ||
c3907a7e RS |
2586 | if (from > ZV) from = ZV; |
2587 | if (from < BEGV) from = BEGV; | |
2588 | ||
2589 | from_byte = CHAR_TO_BYTE (from); | |
2590 | ||
8489eb67 RS |
2591 | immediate_quit = 1; |
2592 | QUIT; | |
2593 | ||
195d1361 | 2594 | SETUP_SYNTAX_TABLE (from, count); |
8489eb67 RS |
2595 | while (count > 0) |
2596 | { | |
8489eb67 RS |
2597 | while (from < stop) |
2598 | { | |
1fc71008 PE |
2599 | bool comstart_first, prefix; |
2600 | int syntax, other_syntax; | |
195d1361 | 2601 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 2602 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
c5683ceb | 2603 | syntax = SYNTAX_WITH_FLAGS (c); |
45b683a1 | 2604 | code = syntax_multibyte (c, multibyte_symbol_p); |
c5683ceb SM |
2605 | comstart_first = SYNTAX_FLAGS_COMSTART_FIRST (syntax); |
2606 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (syntax); | |
2607 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0); | |
2608 | prefix = SYNTAX_FLAGS_PREFIX (syntax); | |
7bf5e9e4 RS |
2609 | if (depth == min_depth) |
2610 | last_good = from; | |
6a140a74 | 2611 | INC_BOTH (from, from_byte); |
195d1361 | 2612 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2613 | if (from < stop && comstart_first |
327719ee | 2614 | && (c = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
c5683ceb SM |
2615 | other_syntax = SYNTAX_WITH_FLAGS (c), |
2616 | SYNTAX_FLAGS_COMSTART_SECOND (other_syntax)) | |
8489eb67 | 2617 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2618 | { |
7d0393cf | 2619 | /* we have encountered a comment start sequence and we |
195d1361 | 2620 | are ignoring all text inside comments. We must record |
e5d4f4dc RS |
2621 | the comment style this sequence begins so that later, |
2622 | only a comment end of the same style actually ends | |
2623 | the comment section */ | |
2624 | code = Scomment; | |
c5683ceb | 2625 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (other_syntax, syntax); |
1fc71008 | 2626 | comnested |= SYNTAX_FLAGS_COMMENT_NESTED (other_syntax); |
6a140a74 | 2627 | INC_BOTH (from, from_byte); |
f902a008 | 2628 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
e5d4f4dc | 2629 | } |
7d0393cf | 2630 | |
f902a008 | 2631 | if (prefix) |
8489eb67 RS |
2632 | continue; |
2633 | ||
7393bcbb | 2634 | switch (code) |
8489eb67 RS |
2635 | { |
2636 | case Sescape: | |
2637 | case Scharquote: | |
8b8bf8e6 SM |
2638 | if (from == stop) |
2639 | goto lose; | |
6a140a74 | 2640 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2641 | /* treat following character as a word constituent */ |
2642 | case Sword: | |
2643 | case Ssymbol: | |
2644 | if (depth || !sexpflag) break; | |
195d1361 | 2645 | /* This word counts as a sexp; return at end of it. */ |
8489eb67 RS |
2646 | while (from < stop) |
2647 | { | |
195d1361 | 2648 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
7c7ca3d2 | 2649 | |
b7dbcc19 | 2650 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
45b683a1 | 2651 | switch (syntax_multibyte (c, multibyte_symbol_p)) |
8489eb67 RS |
2652 | { |
2653 | case Scharquote: | |
2654 | case Sescape: | |
6a140a74 | 2655 | INC_BOTH (from, from_byte); |
8b8bf8e6 SM |
2656 | if (from == stop) |
2657 | goto lose; | |
8489eb67 RS |
2658 | break; |
2659 | case Sword: | |
2660 | case Ssymbol: | |
2661 | case Squote: | |
2662 | break; | |
2663 | default: | |
2664 | goto done; | |
2665 | } | |
6a140a74 | 2666 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2667 | } |
2668 | goto done; | |
2669 | ||
195d1361 | 2670 | case Scomment_fence: |
95ff8dfc RS |
2671 | comstyle = ST_COMMENT_STYLE; |
2672 | /* FALLTHROUGH */ | |
2673 | case Scomment: | |
8489eb67 | 2674 | if (!parse_sexp_ignore_comments) break; |
95ff8dfc RS |
2675 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2676 | found = forw_comment (from, from_byte, stop, | |
2677 | comnested, comstyle, 0, | |
2678 | &out_charpos, &out_bytepos, &dummy); | |
2679 | from = out_charpos, from_byte = out_bytepos; | |
2680 | if (!found) | |
8489eb67 | 2681 | { |
95ff8dfc RS |
2682 | if (depth == 0) |
2683 | goto done; | |
2684 | goto lose; | |
8489eb67 | 2685 | } |
95ff8dfc RS |
2686 | INC_BOTH (from, from_byte); |
2687 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
8489eb67 RS |
2688 | break; |
2689 | ||
2690 | case Smath: | |
2691 | if (!sexpflag) | |
2692 | break; | |
b7dbcc19 | 2693 | if (from != stop && c == FETCH_CHAR_AS_MULTIBYTE (from_byte)) |
6a140a74 RS |
2694 | { |
2695 | INC_BOTH (from, from_byte); | |
2696 | } | |
8489eb67 RS |
2697 | if (mathexit) |
2698 | { | |
2699 | mathexit = 0; | |
2700 | goto close1; | |
2701 | } | |
2702 | mathexit = 1; | |
2703 | ||
2704 | case Sopen: | |
2705 | if (!++depth) goto done; | |
2706 | break; | |
2707 | ||
2708 | case Sclose: | |
2709 | close1: | |
2710 | if (!--depth) goto done; | |
2711 | if (depth < min_depth) | |
9471945b KS |
2712 | xsignal3 (Qscan_error, |
2713 | build_string ("Containing expression ends prematurely"), | |
2714 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2715 | break; |
2716 | ||
2717 | case Sstring: | |
195d1361 | 2718 | case Sstring_fence: |
ef316cf0 | 2719 | temp_pos = dec_bytepos (from_byte); |
b7dbcc19 | 2720 | stringterm = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
8489eb67 RS |
2721 | while (1) |
2722 | { | |
45b683a1 | 2723 | enum syntaxcode c_code; |
8b8bf8e6 SM |
2724 | if (from >= stop) |
2725 | goto lose; | |
195d1361 | 2726 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 2727 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
45b683a1 | 2728 | c_code = syntax_multibyte (c, multibyte_symbol_p); |
42ebfa31 | 2729 | if (code == Sstring |
45b683a1 PE |
2730 | ? c == stringterm && c_code == Sstring |
2731 | : c_code == Sstring_fence) | |
195d1361 | 2732 | break; |
7c7ca3d2 | 2733 | |
1fc71008 | 2734 | switch (c_code) |
8489eb67 RS |
2735 | { |
2736 | case Scharquote: | |
2737 | case Sescape: | |
6a140a74 | 2738 | INC_BOTH (from, from_byte); |
8489eb67 | 2739 | } |
6a140a74 | 2740 | INC_BOTH (from, from_byte); |
8489eb67 | 2741 | } |
6a140a74 | 2742 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2743 | if (!depth && sexpflag) goto done; |
2744 | break; | |
240c43e8 SM |
2745 | default: |
2746 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2747 | break; | |
8489eb67 RS |
2748 | } |
2749 | } | |
2750 | ||
2751 | /* Reached end of buffer. Error if within object, return nil if between */ | |
8b8bf8e6 SM |
2752 | if (depth) |
2753 | goto lose; | |
8489eb67 RS |
2754 | |
2755 | immediate_quit = 0; | |
2756 | return Qnil; | |
2757 | ||
2758 | /* End of object reached */ | |
2759 | done: | |
2760 | count--; | |
2761 | } | |
2762 | ||
2763 | while (count < 0) | |
2764 | { | |
8489eb67 RS |
2765 | while (from > stop) |
2766 | { | |
c5683ceb | 2767 | int syntax; |
6a140a74 | 2768 | DEC_BOTH (from, from_byte); |
195d1361 | 2769 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 2770 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
c5683ceb | 2771 | syntax= SYNTAX_WITH_FLAGS (c); |
45b683a1 | 2772 | code = syntax_multibyte (c, multibyte_symbol_p); |
7bf5e9e4 RS |
2773 | if (depth == min_depth) |
2774 | last_good = from; | |
7fc8191e | 2775 | comstyle = 0; |
c5683ceb | 2776 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (syntax); |
7fc8191e | 2777 | if (code == Sendcomment) |
c5683ceb SM |
2778 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (syntax, 0); |
2779 | if (from > stop && SYNTAX_FLAGS_COMEND_SECOND (syntax) | |
1674d9a2 | 2780 | && prev_char_comend_first (from, from_byte) |
8489eb67 | 2781 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2782 | { |
f902a008 | 2783 | /* We must record the comment style encountered so that |
e5d4f4dc | 2784 | later, we can match only the proper comment begin |
f902a008 | 2785 | sequence of the same style. */ |
01f44d5a | 2786 | int c2, other_syntax; |
6a140a74 | 2787 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2788 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
2789 | code = Sendcomment; | |
01f44d5a PE |
2790 | c2 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
2791 | other_syntax = SYNTAX_WITH_FLAGS (c2); | |
c5683ceb | 2792 | comstyle = SYNTAX_FLAGS_COMMENT_STYLE (other_syntax, syntax); |
1fc71008 | 2793 | comnested |= SYNTAX_FLAGS_COMMENT_NESTED (other_syntax); |
e5d4f4dc | 2794 | } |
7d0393cf | 2795 | |
9828a477 | 2796 | /* Quoting turns anything except a comment-ender |
e6365855 | 2797 | into a word character. Note that this cannot be true |
f902a008 | 2798 | if we decremented FROM in the if-statement above. */ |
9828a477 | 2799 | if (code != Sendcomment && char_quoted (from, from_byte)) |
240c43e8 SM |
2800 | { |
2801 | DEC_BOTH (from, from_byte); | |
2802 | code = Sword; | |
2803 | } | |
c5683ceb | 2804 | else if (SYNTAX_FLAGS_PREFIX (syntax)) |
8489eb67 RS |
2805 | continue; |
2806 | ||
7393bcbb | 2807 | switch (code) |
8489eb67 RS |
2808 | { |
2809 | case Sword: | |
2810 | case Ssymbol: | |
9828a477 KH |
2811 | case Sescape: |
2812 | case Scharquote: | |
8489eb67 | 2813 | if (depth || !sexpflag) break; |
195d1361 RS |
2814 | /* This word counts as a sexp; count object finished |
2815 | after passing it. */ | |
8489eb67 RS |
2816 | while (from > stop) |
2817 | { | |
6a140a74 | 2818 | temp_pos = from_byte; |
4b4deea2 | 2819 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ef316cf0 RS |
2820 | DEC_POS (temp_pos); |
2821 | else | |
2822 | temp_pos--; | |
6a140a74 | 2823 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
b7dbcc19 | 2824 | c1 = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
9828a477 | 2825 | /* Don't allow comment-end to be quoted. */ |
45b683a1 | 2826 | if (syntax_multibyte (c1, multibyte_symbol_p) == Sendcomment) |
9828a477 | 2827 | goto done2; |
6a140a74 | 2828 | quoted = char_quoted (from - 1, temp_pos); |
8489eb67 | 2829 | if (quoted) |
93da5fff | 2830 | { |
6a140a74 | 2831 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2832 | temp_pos = dec_bytepos (temp_pos); |
6a140a74 | 2833 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff | 2834 | } |
b7dbcc19 | 2835 | c1 = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
45b683a1 PE |
2836 | if (! quoted) |
2837 | switch (syntax_multibyte (c1, multibyte_symbol_p)) | |
2838 | { | |
2839 | case Sword: case Ssymbol: case Squote: break; | |
2840 | default: goto done2; | |
2841 | } | |
6a140a74 | 2842 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2843 | } |
2844 | goto done2; | |
2845 | ||
2846 | case Smath: | |
2847 | if (!sexpflag) | |
2848 | break; | |
ef316cf0 | 2849 | temp_pos = dec_bytepos (from_byte); |
6a140a74 | 2850 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
b7dbcc19 | 2851 | if (from != stop && c == FETCH_CHAR_AS_MULTIBYTE (temp_pos)) |
6a140a74 | 2852 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2853 | if (mathexit) |
2854 | { | |
2855 | mathexit = 0; | |
2856 | goto open2; | |
2857 | } | |
2858 | mathexit = 1; | |
2859 | ||
2860 | case Sclose: | |
2861 | if (!++depth) goto done2; | |
2862 | break; | |
2863 | ||
2864 | case Sopen: | |
2865 | open2: | |
2866 | if (!--depth) goto done2; | |
2867 | if (depth < min_depth) | |
9471945b KS |
2868 | xsignal3 (Qscan_error, |
2869 | build_string ("Containing expression ends prematurely"), | |
2870 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2871 | break; |
2872 | ||
2873 | case Sendcomment: | |
2874 | if (!parse_sexp_ignore_comments) | |
2875 | break; | |
95ff8dfc | 2876 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2877 | &out_charpos, &out_bytepos); |
1fc71008 | 2878 | /* FIXME: if !found, it really wasn't a comment-end. |
1aa963c8 SM |
2879 | For single-char Sendcomment, we can't do much about it apart |
2880 | from skipping the char. | |
2881 | For 2-char endcomments, we could try again, taking both | |
2882 | chars as separate entities, but it's a lot of trouble | |
2883 | for very little gain, so we don't bother either. -sm */ | |
1fc71008 | 2884 | if (found) |
6a140a74 | 2885 | from = out_charpos, from_byte = out_bytepos; |
8489eb67 RS |
2886 | break; |
2887 | ||
195d1361 RS |
2888 | case Scomment_fence: |
2889 | case Sstring_fence: | |
2890 | while (1) | |
2891 | { | |
8b8bf8e6 SM |
2892 | if (from == stop) |
2893 | goto lose; | |
6b61353c | 2894 | DEC_BOTH (from, from_byte); |
195d1361 | 2895 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
45b683a1 PE |
2896 | if (!char_quoted (from, from_byte)) |
2897 | { | |
2898 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); | |
2899 | if (syntax_multibyte (c, multibyte_symbol_p) == code) | |
2900 | break; | |
2901 | } | |
195d1361 RS |
2902 | } |
2903 | if (code == Sstring_fence && !depth && sexpflag) goto done2; | |
2904 | break; | |
7d0393cf | 2905 | |
8489eb67 | 2906 | case Sstring: |
b7dbcc19 | 2907 | stringterm = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8489eb67 RS |
2908 | while (1) |
2909 | { | |
8b8bf8e6 SM |
2910 | if (from == stop) |
2911 | goto lose; | |
6b61353c KH |
2912 | DEC_BOTH (from, from_byte); |
2913 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
45b683a1 PE |
2914 | if (!char_quoted (from, from_byte)) |
2915 | { | |
2916 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); | |
2917 | if (c == stringterm | |
2918 | && (syntax_multibyte (c, multibyte_symbol_p) | |
2919 | == Sstring)) | |
2920 | break; | |
2921 | } | |
8489eb67 | 2922 | } |
8489eb67 RS |
2923 | if (!depth && sexpflag) goto done2; |
2924 | break; | |
240c43e8 SM |
2925 | default: |
2926 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2927 | break; | |
8489eb67 RS |
2928 | } |
2929 | } | |
2930 | ||
2931 | /* Reached start of buffer. Error if within object, return nil if between */ | |
8b8bf8e6 SM |
2932 | if (depth) |
2933 | goto lose; | |
8489eb67 RS |
2934 | |
2935 | immediate_quit = 0; | |
2936 | return Qnil; | |
2937 | ||
2938 | done2: | |
2939 | count++; | |
2940 | } | |
2941 | ||
2942 | ||
2943 | immediate_quit = 0; | |
1e142fb7 | 2944 | XSETFASTINT (val, from); |
8489eb67 RS |
2945 | return val; |
2946 | ||
2947 | lose: | |
9471945b KS |
2948 | xsignal3 (Qscan_error, |
2949 | build_string ("Unbalanced parentheses"), | |
2950 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2951 | } |
2952 | ||
8489eb67 | 2953 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, |
fdb82f93 | 2954 | doc: /* Scan from character number FROM by COUNT lists. |
7b926f3f CY |
2955 | Scan forward if COUNT is positive, backward if COUNT is negative. |
2956 | Return the character number of the position thus found. | |
2957 | ||
2958 | A \"list", in this context, refers to a balanced parenthetical | |
2959 | grouping, as determined by the syntax table. | |
fdb82f93 | 2960 | |
7b926f3f CY |
2961 | If DEPTH is nonzero, treat that as the nesting depth of the starting |
2962 | point (i.e. the starting point is DEPTH parentheses deep). This | |
2963 | function scans over parentheses until the depth goes to zero COUNT | |
2964 | times. Hence, positive DEPTH moves out that number of levels of | |
221cd413 | 2965 | parentheses, while negative DEPTH moves to a deeper level. |
fdb82f93 PJ |
2966 | |
2967 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2968 | ||
7b926f3f CY |
2969 | If we reach the beginning or end of the accessible part of the buffer |
2970 | before we have scanned over COUNT lists, return nil if the depth at | |
2971 | that point is zero, and signal a error if the depth is nonzero. */) | |
5842a27b | 2972 | (Lisp_Object from, Lisp_Object count, Lisp_Object depth) |
8489eb67 | 2973 | { |
b7826503 PJ |
2974 | CHECK_NUMBER (from); |
2975 | CHECK_NUMBER (count); | |
2976 | CHECK_NUMBER (depth); | |
8489eb67 RS |
2977 | |
2978 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
2979 | } | |
2980 | ||
2981 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
fdb82f93 PJ |
2982 | doc: /* Scan from character number FROM by COUNT balanced expressions. |
2983 | If COUNT is negative, scan backwards. | |
2984 | Returns the character number of the position thus found. | |
2985 | ||
2986 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2987 | ||
2988 | If the beginning or end of (the accessible part of) the buffer is reached | |
2989 | in the middle of a parenthetical grouping, an error is signaled. | |
2990 | If the beginning or end is reached between groupings | |
2991 | but before count is used up, nil is returned. */) | |
5842a27b | 2992 | (Lisp_Object from, Lisp_Object count) |
8489eb67 | 2993 | { |
b7826503 PJ |
2994 | CHECK_NUMBER (from); |
2995 | CHECK_NUMBER (count); | |
8489eb67 RS |
2996 | |
2997 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
2998 | } | |
2999 | ||
3000 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
fdb82f93 PJ |
3001 | 0, 0, 0, |
3002 | doc: /* Move point backward over any number of chars with prefix syntax. | |
3003 | This includes chars with "quote" or "prefix" syntax (' or p). */) | |
5842a27b | 3004 | (void) |
8489eb67 | 3005 | { |
d311d28c PE |
3006 | ptrdiff_t beg = BEGV; |
3007 | ptrdiff_t opoint = PT; | |
3008 | ptrdiff_t opoint_byte = PT_BYTE; | |
3009 | ptrdiff_t pos = PT; | |
3010 | ptrdiff_t pos_byte = PT_BYTE; | |
93da5fff | 3011 | int c; |
93da5fff | 3012 | |
7d0393cf | 3013 | if (pos <= beg) |
195d1361 | 3014 | { |
f902a008 RS |
3015 | SET_PT_BOTH (opoint, opoint_byte); |
3016 | ||
3017 | return Qnil; | |
195d1361 | 3018 | } |
8489eb67 | 3019 | |
f902a008 RS |
3020 | SETUP_SYNTAX_TABLE (pos, -1); |
3021 | ||
6a140a74 RS |
3022 | DEC_BOTH (pos, pos_byte); |
3023 | ||
1fd3172d | 3024 | while (!char_quoted (pos, pos_byte) |
195d1361 | 3025 | /* Previous statement updates syntax table. */ |
b7dbcc19 | 3026 | && ((c = FETCH_CHAR_AS_MULTIBYTE (pos_byte), SYNTAX (c) == Squote) |
45b683a1 | 3027 | || syntax_prefix_flag_p (c))) |
93da5fff | 3028 | { |
1fd3172d RS |
3029 | opoint = pos; |
3030 | opoint_byte = pos_byte; | |
3031 | ||
3032 | if (pos + 1 > beg) | |
3033 | DEC_BOTH (pos, pos_byte); | |
93da5fff | 3034 | } |
8489eb67 | 3035 | |
6a140a74 | 3036 | SET_PT_BOTH (opoint, opoint_byte); |
8489eb67 RS |
3037 | |
3038 | return Qnil; | |
3039 | } | |
3040 | \f | |
6a140a74 | 3041 | /* Parse forward from FROM / FROM_BYTE to END, |
e5d4f4dc RS |
3042 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
3043 | and return a description of the state of the parse at END. | |
1fc71008 | 3044 | If STOPBEFORE, stop at the start of an atom. |
644ea4df RS |
3045 | If COMMENTSTOP is 1, stop at the start of a comment. |
3046 | If COMMENTSTOP is -1, stop at the start or end of a comment, | |
3047 | after the beginning of a string, or after the end of a string. */ | |
8489eb67 | 3048 | |
340f92b5 | 3049 | static void |
d5a3eaaf | 3050 | scan_sexps_forward (struct lisp_parse_state *stateptr, |
d311d28c | 3051 | ptrdiff_t from, ptrdiff_t from_byte, ptrdiff_t end, |
1fc71008 | 3052 | EMACS_INT targetdepth, bool stopbefore, |
d5a3eaaf | 3053 | Lisp_Object oldstate, int commentstop) |
8489eb67 RS |
3054 | { |
3055 | struct lisp_parse_state state; | |
1fc71008 | 3056 | enum syntaxcode code; |
95ff8dfc | 3057 | int c1; |
1fc71008 | 3058 | bool comnested; |
d311d28c | 3059 | struct level { ptrdiff_t last, prev; }; |
8489eb67 | 3060 | struct level levelstart[100]; |
1fc71008 | 3061 | struct level *curlevel = levelstart; |
8489eb67 | 3062 | struct level *endlevel = levelstart + 100; |
1fc71008 | 3063 | EMACS_INT depth; /* Paren depth of current scanning location. |
8489eb67 RS |
3064 | level - levelstart equals this except |
3065 | when the depth becomes negative. */ | |
d311d28c | 3066 | EMACS_INT mindepth; /* Lowest DEPTH value seen. */ |
1fc71008 | 3067 | bool start_quoted = 0; /* True means starting after a char quote. */ |
8489eb67 | 3068 | Lisp_Object tem; |
d311d28c PE |
3069 | ptrdiff_t prev_from; /* Keep one character before FROM. */ |
3070 | ptrdiff_t prev_from_byte; | |
1fd3172d | 3071 | int prev_from_syntax; |
1fc71008 PE |
3072 | bool boundary_stop = commentstop == -1; |
3073 | bool nofence; | |
3074 | bool found; | |
d311d28c | 3075 | ptrdiff_t out_bytepos, out_charpos; |
7c7ca3d2 | 3076 | int temp; |
93da5fff KH |
3077 | |
3078 | prev_from = from; | |
6a140a74 RS |
3079 | prev_from_byte = from_byte; |
3080 | if (from != BEGV) | |
3081 | DEC_BOTH (prev_from, prev_from_byte); | |
93da5fff KH |
3082 | |
3083 | /* Use this macro instead of `from++'. */ | |
6a140a74 RS |
3084 | #define INC_FROM \ |
3085 | do { prev_from = from; \ | |
3086 | prev_from_byte = from_byte; \ | |
327719ee | 3087 | temp = FETCH_CHAR_AS_MULTIBYTE (prev_from_byte); \ |
ab229fdd | 3088 | prev_from_syntax = SYNTAX_WITH_FLAGS (temp); \ |
ef316cf0 | 3089 | INC_BOTH (from, from_byte); \ |
3ceb4629 SM |
3090 | if (from < end) \ |
3091 | UPDATE_SYNTAX_TABLE_FORWARD (from); \ | |
6a140a74 | 3092 | } while (0) |
8489eb67 RS |
3093 | |
3094 | immediate_quit = 1; | |
3095 | QUIT; | |
3096 | ||
265a9e55 | 3097 | if (NILP (oldstate)) |
8489eb67 RS |
3098 | { |
3099 | depth = 0; | |
3100 | state.instring = -1; | |
3101 | state.incomment = 0; | |
195d1361 RS |
3102 | state.comstyle = 0; /* comment style a by default. */ |
3103 | state.comstr_start = -1; /* no comment/string seen. */ | |
8489eb67 RS |
3104 | } |
3105 | else | |
3106 | { | |
3107 | tem = Fcar (oldstate); | |
265a9e55 | 3108 | if (!NILP (tem)) |
8489eb67 RS |
3109 | depth = XINT (tem); |
3110 | else | |
3111 | depth = 0; | |
3112 | ||
3113 | oldstate = Fcdr (oldstate); | |
3114 | oldstate = Fcdr (oldstate); | |
3115 | oldstate = Fcdr (oldstate); | |
3116 | tem = Fcar (oldstate); | |
195d1361 | 3117 | /* Check whether we are inside string_fence-style string: */ |
7d0393cf | 3118 | state.instring = (!NILP (tem) |
d311d28c | 3119 | ? (CHARACTERP (tem) ? XFASTINT (tem) : ST_STRING_STYLE) |
e76f1c44 | 3120 | : -1); |
8489eb67 RS |
3121 | |
3122 | oldstate = Fcdr (oldstate); | |
3123 | tem = Fcar (oldstate); | |
e76f1c44 GM |
3124 | state.incomment = (!NILP (tem) |
3125 | ? (INTEGERP (tem) ? XINT (tem) : -1) | |
95ff8dfc | 3126 | : 0); |
8489eb67 RS |
3127 | |
3128 | oldstate = Fcdr (oldstate); | |
3129 | tem = Fcar (oldstate); | |
265a9e55 | 3130 | start_quoted = !NILP (tem); |
e5d4f4dc | 3131 | |
95ff8dfc | 3132 | /* if the eighth element of the list is nil, we are in comment |
195d1361 RS |
3133 | style a. If it is non-nil, we are in comment style b */ |
3134 | oldstate = Fcdr (oldstate); | |
e5d4f4dc | 3135 | oldstate = Fcdr (oldstate); |
195d1361 | 3136 | tem = Fcar (oldstate); |
c5683ceb SM |
3137 | state.comstyle = (NILP (tem) |
3138 | ? 0 | |
d311d28c PE |
3139 | : (RANGED_INTEGERP (0, tem, ST_COMMENT_STYLE) |
3140 | ? XINT (tem) | |
3141 | : ST_COMMENT_STYLE)); | |
195d1361 | 3142 | |
e5d4f4dc | 3143 | oldstate = Fcdr (oldstate); |
e5d4f4dc | 3144 | tem = Fcar (oldstate); |
d311d28c PE |
3145 | state.comstr_start = |
3146 | RANGED_INTEGERP (PTRDIFF_MIN, tem, PTRDIFF_MAX) ? XINT (tem) : -1; | |
1a102a58 RS |
3147 | oldstate = Fcdr (oldstate); |
3148 | tem = Fcar (oldstate); | |
3149 | while (!NILP (tem)) /* >= second enclosing sexps. */ | |
3150 | { | |
d311d28c PE |
3151 | Lisp_Object temhd = Fcar (tem); |
3152 | if (RANGED_INTEGERP (PTRDIFF_MIN, temhd, PTRDIFF_MAX)) | |
3153 | curlevel->last = XINT (temhd); | |
1a102a58 | 3154 | if (++curlevel == endlevel) |
02010917 | 3155 | curlevel--; /* error ("Nesting too deep for parser"); */ |
1a102a58 RS |
3156 | curlevel->prev = -1; |
3157 | curlevel->last = -1; | |
3158 | tem = Fcdr (tem); | |
3159 | } | |
8489eb67 RS |
3160 | } |
3161 | state.quoted = 0; | |
3162 | mindepth = depth; | |
3163 | ||
3164 | curlevel->prev = -1; | |
3165 | curlevel->last = -1; | |
3166 | ||
326b283b | 3167 | SETUP_SYNTAX_TABLE (prev_from, 1); |
ab229fdd AS |
3168 | temp = FETCH_CHAR (prev_from_byte); |
3169 | prev_from_syntax = SYNTAX_WITH_FLAGS (temp); | |
3ceb4629 | 3170 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
326b283b | 3171 | |
195d1361 | 3172 | /* Enter the loop at a place appropriate for initial state. */ |
8489eb67 | 3173 | |
326b283b RS |
3174 | if (state.incomment) |
3175 | goto startincomment; | |
8489eb67 RS |
3176 | if (state.instring >= 0) |
3177 | { | |
195d1361 | 3178 | nofence = state.instring != ST_STRING_STYLE; |
326b283b RS |
3179 | if (start_quoted) |
3180 | goto startquotedinstring; | |
8489eb67 RS |
3181 | goto startinstring; |
3182 | } | |
326b283b RS |
3183 | else if (start_quoted) |
3184 | goto startquoted; | |
1fd3172d | 3185 | |
8489eb67 RS |
3186 | while (from < end) |
3187 | { | |
c5683ceb | 3188 | int syntax; |
93da5fff | 3189 | INC_FROM; |
1fd3172d | 3190 | code = prev_from_syntax & 0xff; |
4c920633 | 3191 | |
c5d4b96f SM |
3192 | if (from < end |
3193 | && SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax) | |
3194 | && (c1 = FETCH_CHAR (from_byte), | |
c5683ceb SM |
3195 | syntax = SYNTAX_WITH_FLAGS (c1), |
3196 | SYNTAX_FLAGS_COMSTART_SECOND (syntax))) | |
c5d4b96f SM |
3197 | /* Duplicate code to avoid a complex if-expression |
3198 | which causes trouble for the SGI compiler. */ | |
95ff8dfc | 3199 | { |
c5d4b96f SM |
3200 | /* Record the comment style we have entered so that only |
3201 | the comment-end sequence of the same style actually | |
3202 | terminates the comment section. */ | |
c5683ceb SM |
3203 | state.comstyle |
3204 | = SYNTAX_FLAGS_COMMENT_STYLE (syntax, prev_from_syntax); | |
1fc71008 PE |
3205 | comnested = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) |
3206 | | SYNTAX_FLAGS_COMMENT_NESTED (syntax)); | |
c5d4b96f | 3207 | state.incomment = comnested ? 1 : -1; |
95ff8dfc | 3208 | state.comstr_start = prev_from; |
c5d4b96f SM |
3209 | INC_FROM; |
3210 | code = Scomment; | |
95ff8dfc | 3211 | } |
4c920633 | 3212 | else if (code == Scomment_fence) |
e5d4f4dc RS |
3213 | { |
3214 | /* Record the comment style we have entered so that only | |
3215 | the comment-end sequence of the same style actually | |
3216 | terminates the comment section. */ | |
95ff8dfc RS |
3217 | state.comstyle = ST_COMMENT_STYLE; |
3218 | state.incomment = -1; | |
195d1361 | 3219 | state.comstr_start = prev_from; |
e5d4f4dc | 3220 | code = Scomment; |
e5d4f4dc | 3221 | } |
c5d4b96f SM |
3222 | else if (code == Scomment) |
3223 | { | |
c5683ceb | 3224 | state.comstyle = SYNTAX_FLAGS_COMMENT_STYLE (prev_from_syntax, 0); |
c5d4b96f SM |
3225 | state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ? |
3226 | 1 : -1); | |
3227 | state.comstr_start = prev_from; | |
3228 | } | |
e5d4f4dc | 3229 | |
1fd3172d | 3230 | if (SYNTAX_FLAGS_PREFIX (prev_from_syntax)) |
8489eb67 | 3231 | continue; |
7393bcbb | 3232 | switch (code) |
8489eb67 RS |
3233 | { |
3234 | case Sescape: | |
3235 | case Scharquote: | |
3236 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 3237 | curlevel->last = prev_from; |
8489eb67 RS |
3238 | startquoted: |
3239 | if (from == end) goto endquoted; | |
93da5fff | 3240 | INC_FROM; |
8489eb67 RS |
3241 | goto symstarted; |
3242 | /* treat following character as a word constituent */ | |
3243 | case Sword: | |
3244 | case Ssymbol: | |
3245 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 3246 | curlevel->last = prev_from; |
8489eb67 RS |
3247 | symstarted: |
3248 | while (from < end) | |
3249 | { | |
1fc71008 | 3250 | int symchar = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
45b683a1 | 3251 | switch (SYNTAX (symchar)) |
8489eb67 RS |
3252 | { |
3253 | case Scharquote: | |
3254 | case Sescape: | |
93da5fff | 3255 | INC_FROM; |
8489eb67 RS |
3256 | if (from == end) goto endquoted; |
3257 | break; | |
3258 | case Sword: | |
3259 | case Ssymbol: | |
3260 | case Squote: | |
3261 | break; | |
3262 | default: | |
3263 | goto symdone; | |
3264 | } | |
93da5fff | 3265 | INC_FROM; |
8489eb67 RS |
3266 | } |
3267 | symdone: | |
3268 | curlevel->prev = curlevel->last; | |
3269 | break; | |
3270 | ||
240c43e8 | 3271 | case Scomment_fence: /* Can't happen because it's handled above. */ |
8489eb67 | 3272 | case Scomment: |
195d1361 | 3273 | if (commentstop || boundary_stop) goto done; |
d355bd8a SM |
3274 | startincomment: |
3275 | /* The (from == BEGV) test was to enter the loop in the middle so | |
95ff8dfc | 3276 | that we find a 2-char comment ender even if we start in the |
e6365855 | 3277 | middle of it. We don't want to do that if we're just at the |
d355bd8a | 3278 | beginning of the comment (think of (*) ... (*)). */ |
95ff8dfc RS |
3279 | found = forw_comment (from, from_byte, end, |
3280 | state.incomment, state.comstyle, | |
e6365855 SM |
3281 | (from == BEGV || from < state.comstr_start + 3) |
3282 | ? 0 : prev_from_syntax, | |
95ff8dfc RS |
3283 | &out_charpos, &out_bytepos, &state.incomment); |
3284 | from = out_charpos; from_byte = out_bytepos; | |
3285 | /* Beware! prev_from and friends are invalid now. | |
3286 | Luckily, the `done' doesn't use them and the INC_FROM | |
3287 | sets them to a sane value without looking at them. */ | |
3288 | if (!found) goto done; | |
d355bd8a | 3289 | INC_FROM; |
8489eb67 | 3290 | state.incomment = 0; |
e5d4f4dc | 3291 | state.comstyle = 0; /* reset the comment style */ |
195d1361 | 3292 | if (boundary_stop) goto done; |
8489eb67 RS |
3293 | break; |
3294 | ||
3295 | case Sopen: | |
3296 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
3297 | depth++; | |
3298 | /* curlevel++->last ran into compiler bug on Apollo */ | |
93da5fff | 3299 | curlevel->last = prev_from; |
8489eb67 | 3300 | if (++curlevel == endlevel) |
02010917 | 3301 | curlevel--; /* error ("Nesting too deep for parser"); */ |
8489eb67 RS |
3302 | curlevel->prev = -1; |
3303 | curlevel->last = -1; | |
30844415 | 3304 | if (targetdepth == depth) goto done; |
8489eb67 RS |
3305 | break; |
3306 | ||
3307 | case Sclose: | |
3308 | depth--; | |
3309 | if (depth < mindepth) | |
3310 | mindepth = depth; | |
3311 | if (curlevel != levelstart) | |
3312 | curlevel--; | |
3313 | curlevel->prev = curlevel->last; | |
30844415 | 3314 | if (targetdepth == depth) goto done; |
8489eb67 RS |
3315 | break; |
3316 | ||
3317 | case Sstring: | |
195d1361 RS |
3318 | case Sstring_fence: |
3319 | state.comstr_start = from - 1; | |
8489eb67 | 3320 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
93da5fff | 3321 | curlevel->last = prev_from; |
7d0393cf | 3322 | state.instring = (code == Sstring |
b7dbcc19 | 3323 | ? (FETCH_CHAR_AS_MULTIBYTE (prev_from_byte)) |
195d1361 RS |
3324 | : ST_STRING_STYLE); |
3325 | if (boundary_stop) goto done; | |
8489eb67 | 3326 | startinstring: |
195d1361 | 3327 | { |
644ea4df | 3328 | nofence = state.instring != ST_STRING_STYLE; |
7d0393cf | 3329 | |
644ea4df RS |
3330 | while (1) |
3331 | { | |
3332 | int c; | |
1fc71008 | 3333 | enum syntaxcode c_code; |
195d1361 | 3334 | |
644ea4df | 3335 | if (from >= end) goto done; |
b7dbcc19 | 3336 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
1fc71008 | 3337 | c_code = SYNTAX (c); |
ccf89641 | 3338 | |
1fc71008 | 3339 | /* Check C_CODE here so that if the char has |
ccf89641 KH |
3340 | a syntax-table property which says it is NOT |
3341 | a string character, it does not end the string. */ | |
1fc71008 | 3342 | if (nofence && c == state.instring && c_code == Sstring) |
ccf89641 KH |
3343 | break; |
3344 | ||
1fc71008 | 3345 | switch (c_code) |
644ea4df RS |
3346 | { |
3347 | case Sstring_fence: | |
3348 | if (!nofence) goto string_end; | |
3349 | break; | |
3350 | case Scharquote: | |
3351 | case Sescape: | |
3352 | INC_FROM; | |
3353 | startquotedinstring: | |
3354 | if (from >= end) goto endquoted; | |
195d1361 | 3355 | } |
644ea4df RS |
3356 | INC_FROM; |
3357 | } | |
195d1361 RS |
3358 | } |
3359 | string_end: | |
8489eb67 RS |
3360 | state.instring = -1; |
3361 | curlevel->prev = curlevel->last; | |
93da5fff | 3362 | INC_FROM; |
195d1361 | 3363 | if (boundary_stop) goto done; |
8489eb67 RS |
3364 | break; |
3365 | ||
3366 | case Smath: | |
240c43e8 SM |
3367 | /* FIXME: We should do something with it. */ |
3368 | break; | |
3369 | default: | |
3370 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
8489eb67 RS |
3371 | break; |
3372 | } | |
3373 | } | |
3374 | goto done; | |
3375 | ||
3376 | stop: /* Here if stopping before start of sexp. */ | |
93da5fff | 3377 | from = prev_from; /* We have just fetched the char that starts it; */ |
68643cde | 3378 | from_byte = prev_from_byte; |
8489eb67 RS |
3379 | goto done; /* but return the position before it. */ |
3380 | ||
3381 | endquoted: | |
3382 | state.quoted = 1; | |
3383 | done: | |
3384 | state.depth = depth; | |
3385 | state.mindepth = mindepth; | |
3386 | state.thislevelstart = curlevel->prev; | |
3387 | state.prevlevelstart | |
3388 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
3389 | state.location = from; | |
8ca30920 | 3390 | state.location_byte = from_byte; |
1a102a58 | 3391 | state.levelstarts = Qnil; |
eb4d412d PE |
3392 | while (curlevel > levelstart) |
3393 | state.levelstarts = Fcons (make_number ((--curlevel)->last), | |
3394 | state.levelstarts); | |
8489eb67 RS |
3395 | immediate_quit = 0; |
3396 | ||
e5d4f4dc | 3397 | *stateptr = state; |
8489eb67 RS |
3398 | } |
3399 | ||
c81a3712 | 3400 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
fdb82f93 PJ |
3401 | doc: /* Parse Lisp syntax starting at FROM until TO; return status of parse at TO. |
3402 | Parsing stops at TO or when certain criteria are met; | |
3403 | point is set to where parsing stops. | |
3404 | If fifth arg OLDSTATE is omitted or nil, | |
3405 | parsing assumes that FROM is the beginning of a function. | |
0e6228bc | 3406 | Value is a list of elements describing final state of parsing: |
fdb82f93 PJ |
3407 | 0. depth in parens. |
3408 | 1. character address of start of innermost containing list; nil if none. | |
3409 | 2. character address of start of last complete sexp terminated. | |
3410 | 3. non-nil if inside a string. | |
3411 | (it is the character that will terminate the string, | |
3412 | or t if the string should be terminated by a generic string delimiter.) | |
7d0393cf | 3413 | 4. nil if outside a comment, t if inside a non-nestable comment, |
fdb82f93 PJ |
3414 | else an integer (the current comment nesting). |
3415 | 5. t if following a quote character. | |
3416 | 6. the minimum paren-depth encountered during this scan. | |
c5683ceb | 3417 | 7. style of comment, if any. |
fdb82f93 PJ |
3418 | 8. character address of start of comment or string; nil if not in one. |
3419 | 9. Intermediate data for continuation of parsing (subject to change). | |
3420 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth | |
3421 | in parentheses becomes equal to TARGETDEPTH. | |
3422 | Fourth arg STOPBEFORE non-nil means stop when come to | |
3423 | any character that starts a sexp. | |
0e6228bc | 3424 | Fifth arg OLDSTATE is a list like what this function returns. |
fdb82f93 | 3425 | It is used to initialize the state of the parse. Elements number 1, 2, 6 |
d311d28c | 3426 | are ignored. |
fdb82f93 PJ |
3427 | Sixth arg COMMENTSTOP non-nil means stop at the start of a comment. |
3428 | If it is symbol `syntax-table', stop after the start of a comment or a | |
3429 | string, or after end of a comment or a string. */) | |
8ca30920 DA |
3430 | (Lisp_Object from, Lisp_Object to, Lisp_Object targetdepth, |
3431 | Lisp_Object stopbefore, Lisp_Object oldstate, Lisp_Object commentstop) | |
8489eb67 RS |
3432 | { |
3433 | struct lisp_parse_state state; | |
d311d28c | 3434 | EMACS_INT target; |
8489eb67 | 3435 | |
265a9e55 | 3436 | if (!NILP (targetdepth)) |
8489eb67 | 3437 | { |
b7826503 | 3438 | CHECK_NUMBER (targetdepth); |
8489eb67 RS |
3439 | target = XINT (targetdepth); |
3440 | } | |
3441 | else | |
d311d28c | 3442 | target = TYPE_MINIMUM (EMACS_INT); /* We won't reach this depth */ |
8489eb67 RS |
3443 | |
3444 | validate_region (&from, &to); | |
6a140a74 RS |
3445 | scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)), |
3446 | XINT (to), | |
c81a3712 | 3447 | target, !NILP (stopbefore), oldstate, |
7d0393cf | 3448 | (NILP (commentstop) |
195d1361 | 3449 | ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); |
8489eb67 | 3450 | |
8ca30920 | 3451 | SET_PT_BOTH (state.location, state.location_byte); |
7d0393cf | 3452 | |
8489eb67 | 3453 | return Fcons (make_number (state.depth), |
c5683ceb SM |
3454 | Fcons (state.prevlevelstart < 0 |
3455 | ? Qnil : make_number (state.prevlevelstart), | |
3456 | Fcons (state.thislevelstart < 0 | |
3457 | ? Qnil : make_number (state.thislevelstart), | |
7d0393cf JB |
3458 | Fcons (state.instring >= 0 |
3459 | ? (state.instring == ST_STRING_STYLE | |
195d1361 | 3460 | ? Qt : make_number (state.instring)) : Qnil, |
95ff8dfc RS |
3461 | Fcons (state.incomment < 0 ? Qt : |
3462 | (state.incomment == 0 ? Qnil : | |
3463 | make_number (state.incomment)), | |
8489eb67 | 3464 | Fcons (state.quoted ? Qt : Qnil, |
bff37d2a | 3465 | Fcons (make_number (state.mindepth), |
7d0393cf | 3466 | Fcons ((state.comstyle |
bff37d2a | 3467 | ? (state.comstyle == ST_COMMENT_STYLE |
c5683ceb SM |
3468 | ? Qsyntax_table |
3469 | : make_number (state.comstyle)) | |
3470 | : Qnil), | |
0beaf54f DL |
3471 | Fcons (((state.incomment |
3472 | || (state.instring >= 0)) | |
bff37d2a RS |
3473 | ? make_number (state.comstr_start) |
3474 | : Qnil), | |
1a102a58 | 3475 | Fcons (state.levelstarts, Qnil)))))))))); |
8489eb67 RS |
3476 | } |
3477 | \f | |
dfcf069d | 3478 | void |
971de7fb | 3479 | init_syntax_once (void) |
8489eb67 | 3480 | { |
78f9a1f7 | 3481 | register int i, c; |
8ea151b2 | 3482 | Lisp_Object temp; |
8489eb67 | 3483 | |
5ebaddf5 | 3484 | /* This has to be done here, before we call Fmake_char_table. */ |
cd3520a4 | 3485 | DEFSYM (Qsyntax_table, "syntax-table"); |
5ebaddf5 | 3486 | |
c76826d9 DA |
3487 | /* This variable is DEFSYMed in alloc.c and not initialized yet, so |
3488 | intern it here. NOTE: you must guarantee that init_syntax_once | |
3489 | is called before all other users of this variable. */ | |
d67b4f80 | 3490 | Qchar_table_extra_slots = intern_c_string ("char-table-extra-slots"); |
5ebaddf5 | 3491 | |
93da5fff | 3492 | /* Create objects which can be shared among syntax tables. */ |
25721f5b DA |
3493 | Vsyntax_code_object = make_uninit_vector (Smax); |
3494 | for (i = 0; i < Smax; i++) | |
28be1ada | 3495 | ASET (Vsyntax_code_object, i, Fcons (make_number (i), Qnil)); |
93da5fff | 3496 | |
5ebaddf5 RS |
3497 | /* Now we are ready to set up this property, so we can |
3498 | create syntax tables. */ | |
3499 | Fput (Qsyntax_table, Qchar_table_extra_slots, make_number (0)); | |
3500 | ||
1fc71008 | 3501 | temp = AREF (Vsyntax_code_object, Swhitespace); |
8489eb67 | 3502 | |
5ebaddf5 | 3503 | Vstandard_syntax_table = Fmake_char_table (Qsyntax_table, temp); |
8489eb67 | 3504 | |
aa7b08b4 | 3505 | /* Control characters should not be whitespace. */ |
1fc71008 | 3506 | temp = AREF (Vsyntax_code_object, Spunct); |
aa7b08b4 RS |
3507 | for (i = 0; i <= ' ' - 1; i++) |
3508 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); | |
3509 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 0177, temp); | |
3510 | ||
3511 | /* Except that a few really are whitespace. */ | |
1fc71008 | 3512 | temp = AREF (Vsyntax_code_object, Swhitespace); |
aa7b08b4 RS |
3513 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ' ', temp); |
3514 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\t', temp); | |
3515 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\n', temp); | |
3516 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 015, temp); | |
3517 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 014, temp); | |
3518 | ||
1fc71008 | 3519 | temp = AREF (Vsyntax_code_object, Sword); |
8489eb67 | 3520 | for (i = 'a'; i <= 'z'; i++) |
8ea151b2 | 3521 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3522 | for (i = 'A'; i <= 'Z'; i++) |
8ea151b2 | 3523 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3524 | for (i = '0'; i <= '9'; i++) |
8ea151b2 RS |
3525 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
3526 | ||
3527 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '$', temp); | |
3528 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '%', temp); | |
3529 | ||
3530 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '(', | |
3531 | Fcons (make_number (Sopen), make_number (')'))); | |
3532 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ')', | |
3533 | Fcons (make_number (Sclose), make_number ('('))); | |
3534 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '[', | |
3535 | Fcons (make_number (Sopen), make_number (']'))); | |
3536 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ']', | |
3537 | Fcons (make_number (Sclose), make_number ('['))); | |
3538 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '{', | |
3539 | Fcons (make_number (Sopen), make_number ('}'))); | |
3540 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '}', | |
3541 | Fcons (make_number (Sclose), make_number ('{'))); | |
3542 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '"', | |
1fc71008 | 3543 | Fcons (make_number (Sstring), Qnil)); |
8ea151b2 | 3544 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\\', |
1fc71008 | 3545 | Fcons (make_number (Sescape), Qnil)); |
8ea151b2 | 3546 | |
1fc71008 | 3547 | temp = AREF (Vsyntax_code_object, Ssymbol); |
8489eb67 | 3548 | for (i = 0; i < 10; i++) |
78f9a1f7 KH |
3549 | { |
3550 | c = "_-+*/&|<>="[i]; | |
3551 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3552 | } | |
8489eb67 | 3553 | |
1fc71008 | 3554 | temp = AREF (Vsyntax_code_object, Spunct); |
8489eb67 | 3555 | for (i = 0; i < 12; i++) |
78f9a1f7 KH |
3556 | { |
3557 | c = ".,;:?!#@~^'`"[i]; | |
3558 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3559 | } | |
bd25db08 KH |
3560 | |
3561 | /* All multibyte characters have syntax `word' by default. */ | |
1fc71008 | 3562 | temp = AREF (Vsyntax_code_object, Sword); |
5c7b02ab | 3563 | char_table_set_range (Vstandard_syntax_table, 0x80, MAX_CHAR, temp); |
8489eb67 RS |
3564 | } |
3565 | ||
dfcf069d | 3566 | void |
971de7fb | 3567 | syms_of_syntax (void) |
8489eb67 | 3568 | { |
cd3520a4 | 3569 | DEFSYM (Qsyntax_table_p, "syntax-table-p"); |
8489eb67 | 3570 | |
93da5fff KH |
3571 | staticpro (&Vsyntax_code_object); |
3572 | ||
a2994c46 KS |
3573 | staticpro (&gl_state.object); |
3574 | staticpro (&gl_state.global_code); | |
3575 | staticpro (&gl_state.current_syntax_table); | |
3576 | staticpro (&gl_state.old_prop); | |
3577 | ||
3578 | /* Defined in regex.c */ | |
3579 | staticpro (&re_match_object); | |
3580 | ||
cd3520a4 | 3581 | DEFSYM (Qscan_error, "scan-error"); |
7bf5e9e4 | 3582 | Fput (Qscan_error, Qerror_conditions, |
3438fe21 | 3583 | listn (CONSTYPE_PURE, 2, Qscan_error, Qerror)); |
7bf5e9e4 | 3584 | Fput (Qscan_error, Qerror_message, |
2a0213a6 | 3585 | build_pure_c_string ("Scan error")); |
7bf5e9e4 | 3586 | |
29208e82 | 3587 | DEFVAR_BOOL ("parse-sexp-ignore-comments", parse_sexp_ignore_comments, |
fdb82f93 | 3588 | doc: /* Non-nil means `forward-sexp', etc., should treat comments as whitespace. */); |
8489eb67 | 3589 | |
29208e82 | 3590 | DEFVAR_BOOL ("parse-sexp-lookup-properties", parse_sexp_lookup_properties, |
fdb82f93 PJ |
3591 | doc: /* Non-nil means `forward-sexp', etc., obey `syntax-table' property. |
3592 | Otherwise, that text property is simply ignored. | |
3593 | See the info node `(elisp)Syntax Properties' for a description of the | |
3594 | `syntax-table' property. */); | |
195d1361 | 3595 | |
8489eb67 | 3596 | words_include_escapes = 0; |
29208e82 | 3597 | DEFVAR_BOOL ("words-include-escapes", words_include_escapes, |
fdb82f93 | 3598 | doc: /* Non-nil means `forward-word', etc., should treat escape chars part of words. */); |
8489eb67 | 3599 | |
29208e82 | 3600 | DEFVAR_BOOL ("multibyte-syntax-as-symbol", multibyte_syntax_as_symbol, |
fdb82f93 | 3601 | doc: /* Non-nil means `scan-sexps' treats all multibyte characters as symbol. */); |
bd25db08 KH |
3602 | multibyte_syntax_as_symbol = 0; |
3603 | ||
f4ed767f | 3604 | DEFVAR_BOOL ("open-paren-in-column-0-is-defun-start", |
29208e82 | 3605 | open_paren_in_column_0_is_defun_start, |
fb7ada5f | 3606 | doc: /* Non-nil means an open paren in column 0 denotes the start of a defun. */); |
f4ed767f GM |
3607 | open_paren_in_column_0_is_defun_start = 1; |
3608 | ||
8f924df7 KH |
3609 | |
3610 | DEFVAR_LISP ("find-word-boundary-function-table", | |
29208e82 | 3611 | Vfind_word_boundary_function_table, |
869bb237 | 3612 | doc: /* |
8f924df7 | 3613 | Char table of functions to search for the word boundary. |
869bb237 KH |
3614 | Each function is called with two arguments; POS and LIMIT. |
3615 | POS and LIMIT are character positions in the current buffer. | |
3616 | ||
3617 | If POS is less than LIMIT, POS is at the first character of a word, | |
3618 | and the return value of a function is a position after the last | |
3619 | character of that word. | |
3620 | ||
3621 | If POS is not less than LIMIT, POS is at the last character of a word, | |
3622 | and the return value of a function is a position at the first | |
3623 | character of that word. | |
3624 | ||
3625 | In both cases, LIMIT bounds the search. */); | |
8f924df7 | 3626 | Vfind_word_boundary_function_table = Fmake_char_table (Qnil, Qnil); |
869bb237 | 3627 | |
8489eb67 RS |
3628 | defsubr (&Ssyntax_table_p); |
3629 | defsubr (&Ssyntax_table); | |
3630 | defsubr (&Sstandard_syntax_table); | |
3631 | defsubr (&Scopy_syntax_table); | |
3632 | defsubr (&Sset_syntax_table); | |
3633 | defsubr (&Schar_syntax); | |
beefa22e | 3634 | defsubr (&Smatching_paren); |
c65adb44 | 3635 | defsubr (&Sstring_to_syntax); |
8489eb67 | 3636 | defsubr (&Smodify_syntax_entry); |
62abe9cb | 3637 | defsubr (&Sinternal_describe_syntax_value); |
8489eb67 RS |
3638 | |
3639 | defsubr (&Sforward_word); | |
3640 | ||
195d1361 RS |
3641 | defsubr (&Sskip_chars_forward); |
3642 | defsubr (&Sskip_chars_backward); | |
3643 | defsubr (&Sskip_syntax_forward); | |
3644 | defsubr (&Sskip_syntax_backward); | |
3645 | ||
b3cfe0c8 | 3646 | defsubr (&Sforward_comment); |
8489eb67 RS |
3647 | defsubr (&Sscan_lists); |
3648 | defsubr (&Sscan_sexps); | |
3649 | defsubr (&Sbackward_prefix_chars); | |
3650 | defsubr (&Sparse_partial_sexp); | |
3651 | } |