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8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
c6c5df7f | 2 | Copyright (C) 1985, 1987, 1993 Free Software Foundation, Inc. |
8489eb67 RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a4275ad1 | 8 | the Free Software Foundation; either version 2, or (at your option) |
8489eb67 RS |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include <ctype.h> | |
23 | #include "lisp.h" | |
24 | #include "commands.h" | |
25 | #include "buffer.h" | |
26 | #include "syntax.h" | |
27 | ||
28 | Lisp_Object Qsyntax_table_p; | |
29 | ||
340f92b5 RS |
30 | static void scan_sexps_forward (); |
31 | static int char_quoted (); | |
32 | ||
8489eb67 RS |
33 | int words_include_escapes; |
34 | ||
e5d4f4dc RS |
35 | /* This is the internal form of the parse state used in parse-partial-sexp. */ |
36 | ||
37 | struct lisp_parse_state | |
38 | { | |
39 | int depth; /* Depth at end of parsing */ | |
40 | int instring; /* -1 if not within string, else desired terminator. */ | |
41 | int incomment; /* Nonzero if within a comment at end of parsing */ | |
42 | int comstyle; /* comment style a=0, or b=1 */ | |
43 | int quoted; /* Nonzero if just after an escape char at end of parsing */ | |
44 | int thislevelstart; /* Char number of most recent start-of-expression at current level */ | |
45 | int prevlevelstart; /* Char number of start of containing expression */ | |
46 | int location; /* Char number at which parsing stopped. */ | |
47 | int mindepth; /* Minimum depth seen while scanning. */ | |
48 | int comstart; /* Position just after last comment starter. */ | |
49 | }; | |
50 | \f | |
37bef230 RS |
51 | /* These variables are a cache for finding the start of a defun. |
52 | find_start_pos is the place for which the defun start was found. | |
53 | find_start_value is the defun start position found for it. | |
54 | find_start_buffer is the buffer it was found in. | |
55 | find_start_begv is the BEGV value when it was found. | |
56 | find_start_modiff is the value of MODIFF when it was found. */ | |
57 | ||
58 | static int find_start_pos; | |
59 | static int find_start_value; | |
60 | static struct buffer *find_start_buffer; | |
61 | static int find_start_begv; | |
62 | static int find_start_modiff; | |
63 | ||
64 | /* Find a defun-start that is the last one before POS (or nearly the last). | |
65 | We record what we find, so that another call in the same area | |
66 | can return the same value right away. */ | |
67 | ||
68 | static int | |
69 | find_defun_start (pos) | |
70 | int pos; | |
71 | { | |
72 | int tem; | |
73 | int shortage; | |
74 | ||
75 | /* Use previous finding, if it's valid and applies to this inquiry. */ | |
76 | if (current_buffer == find_start_buffer | |
77 | /* Reuse the defun-start even if POS is a little farther on. | |
78 | POS might be in the next defun, but that's ok. | |
79 | Our value may not be the best possible, but will still be usable. */ | |
80 | && pos <= find_start_pos + 1000 | |
81 | && pos >= find_start_value | |
82 | && BEGV == find_start_begv | |
83 | && MODIFF == find_start_modiff) | |
84 | return find_start_value; | |
85 | ||
86 | /* Back up to start of line. */ | |
87 | tem = scan_buffer ('\n', pos, -1, &shortage); | |
37bef230 RS |
88 | |
89 | while (tem > BEGV) | |
90 | { | |
91 | /* Open-paren at start of line means we found our defun-start. */ | |
92 | if (SYNTAX (FETCH_CHAR (tem)) == Sopen) | |
93 | break; | |
94 | /* Move to beg of previous line. */ | |
95 | tem = scan_buffer ('\n', tem, -2, &shortage); | |
37bef230 RS |
96 | } |
97 | ||
98 | /* Record what we found, for the next try. */ | |
99 | find_start_value = tem; | |
100 | find_start_buffer = current_buffer; | |
101 | find_start_modiff = MODIFF; | |
102 | find_start_begv = BEGV; | |
103 | find_start_pos = pos; | |
104 | ||
105 | return find_start_value; | |
106 | } | |
107 | \f | |
8489eb67 RS |
108 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
109 | "Return t if ARG is a syntax table.\n\ | |
110 | Any vector of 256 elements will do.") | |
111 | (obj) | |
112 | Lisp_Object obj; | |
113 | { | |
114 | if (XTYPE (obj) == Lisp_Vector && XVECTOR (obj)->size == 0400) | |
115 | return Qt; | |
116 | return Qnil; | |
117 | } | |
118 | ||
119 | Lisp_Object | |
120 | check_syntax_table (obj) | |
121 | Lisp_Object obj; | |
122 | { | |
123 | register Lisp_Object tem; | |
124 | while (tem = Fsyntax_table_p (obj), | |
265a9e55 | 125 | NILP (tem)) |
b3cfe0c8 | 126 | obj = wrong_type_argument (Qsyntax_table_p, obj); |
8489eb67 RS |
127 | return obj; |
128 | } | |
129 | ||
130 | ||
131 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, | |
132 | "Return the current syntax table.\n\ | |
133 | This is the one specified by the current buffer.") | |
134 | () | |
135 | { | |
136 | return current_buffer->syntax_table; | |
137 | } | |
138 | ||
139 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
140 | Sstandard_syntax_table, 0, 0, 0, | |
141 | "Return the standard syntax table.\n\ | |
142 | This is the one used for new buffers.") | |
143 | () | |
144 | { | |
145 | return Vstandard_syntax_table; | |
146 | } | |
147 | ||
148 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
149 | "Construct a new syntax table and return it.\n\ | |
150 | It is a copy of the TABLE, which defaults to the standard syntax table.") | |
151 | (table) | |
152 | Lisp_Object table; | |
153 | { | |
154 | Lisp_Object size, val; | |
155 | XFASTINT (size) = 0400; | |
156 | XFASTINT (val) = 0; | |
157 | val = Fmake_vector (size, val); | |
265a9e55 | 158 | if (!NILP (table)) |
8489eb67 | 159 | table = check_syntax_table (table); |
265a9e55 | 160 | else if (NILP (Vstandard_syntax_table)) |
8489eb67 RS |
161 | /* Can only be null during initialization */ |
162 | return val; | |
163 | else table = Vstandard_syntax_table; | |
164 | ||
165 | bcopy (XVECTOR (table)->contents, | |
166 | XVECTOR (val)->contents, 0400 * sizeof (Lisp_Object)); | |
167 | return val; | |
168 | } | |
169 | ||
170 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
171 | "Select a new syntax table for the current buffer.\n\ | |
172 | One argument, a syntax table.") | |
173 | (table) | |
174 | Lisp_Object table; | |
175 | { | |
176 | table = check_syntax_table (table); | |
177 | current_buffer->syntax_table = table; | |
178 | /* Indicate that this buffer now has a specified syntax table. */ | |
f110a664 RS |
179 | current_buffer->local_var_flags |
180 | |= XFASTINT (buffer_local_flags.syntax_table); | |
8489eb67 RS |
181 | return table; |
182 | } | |
183 | \f | |
184 | /* Convert a letter which signifies a syntax code | |
185 | into the code it signifies. | |
186 | This is used by modify-syntax-entry, and other things. */ | |
187 | ||
188 | unsigned char syntax_spec_code[0400] = | |
189 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
190 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
191 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
192 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
193 | (char) Swhitespace, 0377, (char) Sstring, 0377, | |
194 | (char) Smath, 0377, 0377, (char) Squote, | |
195 | (char) Sopen, (char) Sclose, 0377, 0377, | |
196 | 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
197 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
198 | 0377, 0377, 0377, 0377, | |
199 | (char) Scomment, 0377, (char) Sendcomment, 0377, | |
200 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A, ... */ | |
201 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
202 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
203 | 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
204 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
205 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
206 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
207 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377 | |
208 | }; | |
209 | ||
210 | /* Indexed by syntax code, give the letter that describes it. */ | |
211 | ||
212 | char syntax_code_spec[13] = | |
213 | { | |
214 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>' | |
215 | }; | |
216 | \f | |
217 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, | |
218 | "Return the syntax code of CHAR, described by a character.\n\ | |
219 | For example, if CHAR is a word constituent, the character `?w' is returned.\n\ | |
220 | The characters that correspond to various syntax codes\n\ | |
221 | are listed in the documentation of `modify-syntax-entry'.") | |
222 | (ch) | |
223 | Lisp_Object ch; | |
224 | { | |
225 | CHECK_NUMBER (ch, 0); | |
226 | return make_number (syntax_code_spec[(int) SYNTAX (0xFF & XINT (ch))]); | |
227 | } | |
228 | ||
229 | /* This comment supplies the doc string for modify-syntax-entry, | |
230 | for make-docfile to see. We cannot put this in the real DEFUN | |
231 | due to limits in the Unix cpp. | |
232 | ||
2fcea188 | 233 | DEFUN ("modify-syntax-entry", foo, bar, 2, 3, 0, |
8489eb67 RS |
234 | "Set syntax for character CHAR according to string S.\n\ |
235 | The syntax is changed only for table TABLE, which defaults to\n\ | |
236 | the current buffer's syntax table.\n\ | |
237 | The first character of S should be one of the following:\n\ | |
32676c08 JB |
238 | Space or - whitespace syntax. w word constituent.\n\ |
239 | _ symbol constituent. . punctuation.\n\ | |
240 | ( open-parenthesis. ) close-parenthesis.\n\ | |
241 | \" string quote. \\ escape.\n\ | |
242 | $ paired delimiter. ' expression quote or prefix operator.\n\ | |
243 | < comment starter. > comment ender.\n\ | |
244 | / character-quote.\n\ | |
8489eb67 RS |
245 | Only single-character comment start and end sequences are represented thus.\n\ |
246 | Two-character sequences are represented as described below.\n\ | |
247 | The second character of S is the matching parenthesis,\n\ | |
248 | used only if the first character is `(' or `)'.\n\ | |
249 | Any additional characters are flags.\n\ | |
e5d4f4dc | 250 | Defined flags are the characters 1, 2, 3, 4, b, and p.\n\ |
8489eb67 RS |
251 | 1 means C is the start of a two-char comment start sequence.\n\ |
252 | 2 means C is the second character of such a sequence.\n\ | |
253 | 3 means C is the start of a two-char comment end sequence.\n\ | |
254 | 4 means C is the second character of such a sequence.\n\ | |
e5d4f4dc RS |
255 | \n\ |
256 | There can be up to two orthogonal comment sequences. This is to support\n\ | |
257 | language modes such as C++. By default, all comment sequences are of style\n\ | |
258 | a, but you can set the comment sequence style to b (on the second character of a\n\ | |
259 | comment-start, or the first character of a comment-end sequence) by using\n\ | |
260 | this flag:\n\ | |
261 | b means C is part of comment sequence b.\n\ | |
262 | \n\ | |
263 | p means C is a prefix character for `backward-prefix-chars';\n\ | |
264 | such characters are treated as whitespace when they occur\n\ | |
8489eb67 | 265 | between expressions.") |
2fcea188 | 266 | (char, s, table) |
8489eb67 RS |
267 | */ |
268 | ||
269 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, | |
270 | /* I really don't know why this is interactive | |
271 | help-form should at least be made useful whilst reading the second arg | |
272 | */ | |
273 | "cSet syntax for character: \nsSet syntax for %s to: ", | |
274 | 0 /* See immediately above */) | |
275 | (c, newentry, syntax_table) | |
276 | Lisp_Object c, newentry, syntax_table; | |
277 | { | |
278 | register unsigned char *p, match; | |
279 | register enum syntaxcode code; | |
280 | Lisp_Object val; | |
281 | ||
282 | CHECK_NUMBER (c, 0); | |
283 | CHECK_STRING (newentry, 1); | |
265a9e55 | 284 | if (NILP (syntax_table)) |
8489eb67 RS |
285 | syntax_table = current_buffer->syntax_table; |
286 | else | |
287 | syntax_table = check_syntax_table (syntax_table); | |
288 | ||
289 | p = XSTRING (newentry)->data; | |
290 | code = (enum syntaxcode) syntax_spec_code[*p++]; | |
291 | if (((int) code & 0377) == 0377) | |
292 | error ("invalid syntax description letter: %c", c); | |
293 | ||
294 | match = *p; | |
295 | if (match) p++; | |
296 | if (match == ' ') match = 0; | |
297 | ||
298 | XFASTINT (val) = (match << 8) + (int) code; | |
299 | while (*p) | |
300 | switch (*p++) | |
301 | { | |
302 | case '1': | |
303 | XFASTINT (val) |= 1 << 16; | |
304 | break; | |
305 | ||
306 | case '2': | |
307 | XFASTINT (val) |= 1 << 17; | |
308 | break; | |
309 | ||
310 | case '3': | |
311 | XFASTINT (val) |= 1 << 18; | |
312 | break; | |
313 | ||
314 | case '4': | |
315 | XFASTINT (val) |= 1 << 19; | |
316 | break; | |
317 | ||
318 | case 'p': | |
319 | XFASTINT (val) |= 1 << 20; | |
320 | break; | |
e5d4f4dc RS |
321 | |
322 | case 'b': | |
323 | XFASTINT (val) |= 1 << 21; | |
324 | break; | |
8489eb67 RS |
325 | } |
326 | ||
327 | XVECTOR (syntax_table)->contents[0xFF & XINT (c)] = val; | |
328 | ||
329 | return Qnil; | |
330 | } | |
331 | \f | |
332 | /* Dump syntax table to buffer in human-readable format */ | |
333 | ||
340f92b5 | 334 | static void |
8489eb67 RS |
335 | describe_syntax (value) |
336 | Lisp_Object value; | |
337 | { | |
338 | register enum syntaxcode code; | |
e5d4f4dc | 339 | char desc, match, start1, start2, end1, end2, prefix, comstyle; |
8489eb67 RS |
340 | char str[2]; |
341 | ||
342 | Findent_to (make_number (16), make_number (1)); | |
343 | ||
344 | if (XTYPE (value) != Lisp_Int) | |
345 | { | |
346 | insert_string ("invalid"); | |
347 | return; | |
348 | } | |
349 | ||
350 | code = (enum syntaxcode) (XINT (value) & 0377); | |
351 | match = (XINT (value) >> 8) & 0377; | |
352 | start1 = (XINT (value) >> 16) & 1; | |
353 | start2 = (XINT (value) >> 17) & 1; | |
354 | end1 = (XINT (value) >> 18) & 1; | |
355 | end2 = (XINT (value) >> 19) & 1; | |
356 | prefix = (XINT (value) >> 20) & 1; | |
e5d4f4dc | 357 | comstyle = (XINT (value) >> 21) & 1; |
8489eb67 RS |
358 | |
359 | if ((int) code < 0 || (int) code >= (int) Smax) | |
360 | { | |
361 | insert_string ("invalid"); | |
362 | return; | |
363 | } | |
364 | desc = syntax_code_spec[(int) code]; | |
365 | ||
366 | str[0] = desc, str[1] = 0; | |
367 | insert (str, 1); | |
368 | ||
369 | str[0] = match ? match : ' '; | |
370 | insert (str, 1); | |
371 | ||
372 | ||
373 | if (start1) | |
374 | insert ("1", 1); | |
375 | if (start2) | |
376 | insert ("2", 1); | |
377 | ||
378 | if (end1) | |
379 | insert ("3", 1); | |
380 | if (end2) | |
381 | insert ("4", 1); | |
382 | ||
383 | if (prefix) | |
384 | insert ("p", 1); | |
e5d4f4dc RS |
385 | if (comstyle) |
386 | insert ("b", 1); | |
8489eb67 RS |
387 | |
388 | insert_string ("\twhich means: "); | |
389 | ||
390 | #ifdef SWITCH_ENUM_BUG | |
391 | switch ((int) code) | |
392 | #else | |
393 | switch (code) | |
394 | #endif | |
395 | { | |
396 | case Swhitespace: | |
397 | insert_string ("whitespace"); break; | |
398 | case Spunct: | |
399 | insert_string ("punctuation"); break; | |
400 | case Sword: | |
401 | insert_string ("word"); break; | |
402 | case Ssymbol: | |
403 | insert_string ("symbol"); break; | |
404 | case Sopen: | |
405 | insert_string ("open"); break; | |
406 | case Sclose: | |
407 | insert_string ("close"); break; | |
408 | case Squote: | |
409 | insert_string ("quote"); break; | |
410 | case Sstring: | |
411 | insert_string ("string"); break; | |
412 | case Smath: | |
413 | insert_string ("math"); break; | |
414 | case Sescape: | |
415 | insert_string ("escape"); break; | |
416 | case Scharquote: | |
417 | insert_string ("charquote"); break; | |
418 | case Scomment: | |
419 | insert_string ("comment"); break; | |
420 | case Sendcomment: | |
421 | insert_string ("endcomment"); break; | |
422 | default: | |
423 | insert_string ("invalid"); | |
424 | return; | |
425 | } | |
426 | ||
427 | if (match) | |
428 | { | |
429 | insert_string (", matches "); | |
410e16ff | 430 | insert_char (match); |
8489eb67 RS |
431 | } |
432 | ||
433 | if (start1) | |
434 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
435 | if (start2) | |
436 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
437 | ||
438 | if (end1) | |
439 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
440 | if (end2) | |
441 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
442 | if (comstyle) |
443 | insert_string (" (comment style b)"); | |
444 | ||
8489eb67 RS |
445 | if (prefix) |
446 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
447 | ||
448 | insert_string ("\n"); | |
449 | } | |
450 | ||
340f92b5 | 451 | static Lisp_Object |
8489eb67 RS |
452 | describe_syntax_1 (vector) |
453 | Lisp_Object vector; | |
454 | { | |
455 | struct buffer *old = current_buffer; | |
456 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
b3cfe0c8 | 457 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil); |
8489eb67 RS |
458 | set_buffer_internal (old); |
459 | return Qnil; | |
460 | } | |
461 | ||
462 | DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "", | |
463 | "Describe the syntax specifications in the syntax table.\n\ | |
464 | The descriptions are inserted in a buffer, which is then displayed.") | |
465 | () | |
466 | { | |
467 | internal_with_output_to_temp_buffer | |
468 | ("*Help*", describe_syntax_1, current_buffer->syntax_table); | |
469 | ||
470 | return Qnil; | |
471 | } | |
472 | \f | |
473 | /* Return the position across COUNT words from FROM. | |
474 | If that many words cannot be found before the end of the buffer, return 0. | |
475 | COUNT negative means scan backward and stop at word beginning. */ | |
476 | ||
477 | scan_words (from, count) | |
478 | register int from, count; | |
479 | { | |
480 | register int beg = BEGV; | |
481 | register int end = ZV; | |
482 | register int code; | |
483 | ||
484 | immediate_quit = 1; | |
485 | QUIT; | |
486 | ||
487 | while (count > 0) | |
488 | { | |
489 | while (1) | |
490 | { | |
491 | if (from == end) | |
492 | { | |
493 | immediate_quit = 0; | |
494 | return 0; | |
495 | } | |
496 | code = SYNTAX (FETCH_CHAR (from)); | |
497 | if (words_include_escapes | |
498 | && (code == Sescape || code == Scharquote)) | |
499 | break; | |
500 | if (code == Sword) | |
501 | break; | |
502 | from++; | |
503 | } | |
504 | while (1) | |
505 | { | |
506 | if (from == end) break; | |
507 | code = SYNTAX (FETCH_CHAR (from)); | |
508 | if (!(words_include_escapes | |
509 | && (code == Sescape || code == Scharquote))) | |
510 | if (code != Sword) | |
511 | break; | |
512 | from++; | |
513 | } | |
514 | count--; | |
515 | } | |
516 | while (count < 0) | |
517 | { | |
518 | while (1) | |
519 | { | |
520 | if (from == beg) | |
521 | { | |
522 | immediate_quit = 0; | |
523 | return 0; | |
524 | } | |
525 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
526 | if (words_include_escapes | |
527 | && (code == Sescape || code == Scharquote)) | |
528 | break; | |
529 | if (code == Sword) | |
530 | break; | |
531 | from--; | |
532 | } | |
533 | while (1) | |
534 | { | |
535 | if (from == beg) break; | |
536 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
537 | if (!(words_include_escapes | |
538 | && (code == Sescape || code == Scharquote))) | |
539 | if (code != Sword) | |
540 | break; | |
541 | from--; | |
542 | } | |
543 | count++; | |
544 | } | |
545 | ||
546 | immediate_quit = 0; | |
547 | ||
548 | return from; | |
549 | } | |
550 | ||
551 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", | |
552 | "Move point forward ARG words (backward if ARG is negative).\n\ | |
553 | Normally returns t.\n\ | |
554 | If an edge of the buffer is reached, point is left there\n\ | |
555 | and nil is returned.") | |
556 | (count) | |
557 | Lisp_Object count; | |
558 | { | |
559 | int val; | |
560 | CHECK_NUMBER (count, 0); | |
561 | ||
562 | if (!(val = scan_words (point, XINT (count)))) | |
563 | { | |
564 | SET_PT (XINT (count) > 0 ? ZV : BEGV); | |
565 | return Qnil; | |
566 | } | |
567 | SET_PT (val); | |
568 | return Qt; | |
569 | } | |
570 | \f | |
b3cfe0c8 RS |
571 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
572 | "Move forward across up to N comments. If N is negative, move backward.\n\ | |
b3cfe0c8 | 573 | Stop scanning if we find something other than a comment or whitespace.\n\ |
c81a3712 | 574 | Set point to where scanning stops.\n\ |
b3cfe0c8 RS |
575 | If N comments are found as expected, with nothing except whitespace\n\ |
576 | between them, return t; otherwise return nil.") | |
577 | (count) | |
840f481c | 578 | Lisp_Object count; |
b3cfe0c8 RS |
579 | { |
580 | register int from; | |
581 | register int stop; | |
582 | register int c; | |
583 | register enum syntaxcode code; | |
584 | int comstyle = 0; /* style of comment encountered */ | |
be720845 | 585 | int found; |
840f481c RS |
586 | int count1; |
587 | ||
588 | CHECK_NUMBER (count, 0); | |
589 | count1 = XINT (count); | |
b3cfe0c8 RS |
590 | |
591 | immediate_quit = 1; | |
592 | QUIT; | |
593 | ||
594 | from = PT; | |
595 | ||
840f481c | 596 | while (count1 > 0) |
b3cfe0c8 RS |
597 | { |
598 | stop = ZV; | |
599 | while (from < stop) | |
600 | { | |
601 | c = FETCH_CHAR (from); | |
602 | code = SYNTAX (c); | |
603 | from++; | |
604 | comstyle = 0; | |
605 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
606 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
607 | { | |
608 | /* we have encountered a comment start sequence and we | |
609 | are ignoring all text inside comments. we must record | |
610 | the comment style this sequence begins so that later, | |
611 | only a comment end of the same style actually ends | |
612 | the comment section */ | |
613 | code = Scomment; | |
614 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
615 | from++; | |
616 | } | |
617 | ||
618 | if (code == Scomment) | |
619 | { | |
620 | while (1) | |
621 | { | |
622 | if (from == stop) | |
623 | { | |
624 | immediate_quit = 0; | |
c81a3712 | 625 | SET_PT (from); |
b3cfe0c8 RS |
626 | return Qnil; |
627 | } | |
628 | c = FETCH_CHAR (from); | |
629 | if (SYNTAX (c) == Sendcomment | |
630 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
631 | /* we have encountered a comment end of the same style | |
632 | as the comment sequence which began this comment | |
633 | section */ | |
634 | break; | |
635 | from++; | |
636 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
637 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) | |
638 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
639 | /* we have encountered a comment end of the same style | |
640 | as the comment sequence which began this comment | |
641 | section */ | |
642 | { from++; break; } | |
643 | } | |
644 | /* We have skipped one comment. */ | |
645 | break; | |
646 | } | |
c81a3712 | 647 | else if (code != Swhitespace && code != Sendcomment) |
b3cfe0c8 RS |
648 | { |
649 | immediate_quit = 0; | |
c81a3712 | 650 | SET_PT (from - 1); |
b3cfe0c8 RS |
651 | return Qnil; |
652 | } | |
653 | } | |
654 | ||
655 | /* End of comment reached */ | |
840f481c | 656 | count1--; |
b3cfe0c8 RS |
657 | } |
658 | ||
840f481c | 659 | while (count1 < 0) |
b3cfe0c8 RS |
660 | { |
661 | stop = BEGV; | |
662 | while (from > stop) | |
663 | { | |
664 | int quoted; | |
665 | ||
666 | from--; | |
667 | quoted = char_quoted (from); | |
668 | if (quoted) | |
669 | from--; | |
670 | c = FETCH_CHAR (from); | |
671 | code = SYNTAX (c); | |
672 | comstyle = 0; | |
673 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
674 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
675 | && !char_quoted (from - 1)) | |
676 | { | |
677 | /* we must record the comment style encountered so that | |
678 | later, we can match only the proper comment begin | |
679 | sequence of the same style */ | |
680 | code = Sendcomment; | |
681 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
682 | from--; | |
683 | } | |
684 | ||
685 | if (code == Sendcomment && !quoted) | |
686 | { | |
8f9dc2ed | 687 | #if 0 |
b3cfe0c8 RS |
688 | if (code != SYNTAX (c)) |
689 | /* For a two-char comment ender, we can assume | |
690 | it does end a comment. So scan back in a simple way. */ | |
691 | { | |
692 | if (from != stop) from--; | |
693 | while (1) | |
694 | { | |
695 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
696 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
697 | break; | |
698 | if (from == stop) | |
699 | { | |
700 | immediate_quit = 0; | |
c81a3712 | 701 | SET_PT (from); |
b3cfe0c8 RS |
702 | return Qnil; |
703 | } | |
704 | from--; | |
705 | if (SYNTAX_COMSTART_SECOND (c) | |
706 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
707 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
708 | && !char_quoted (from)) | |
709 | break; | |
710 | } | |
711 | break; | |
712 | } | |
8f9dc2ed | 713 | #endif /* 0 */ |
b3cfe0c8 RS |
714 | |
715 | /* Look back, counting the parity of string-quotes, | |
716 | and recording the comment-starters seen. | |
717 | When we reach a safe place, assume that's not in a string; | |
718 | then step the main scan to the earliest comment-starter seen | |
719 | an even number of string quotes away from the safe place. | |
720 | ||
721 | OFROM[I] is position of the earliest comment-starter seen | |
722 | which is I+2X quotes from the comment-end. | |
723 | PARITY is current parity of quotes from the comment end. */ | |
724 | { | |
725 | int parity = 0; | |
726 | char my_stringend = 0; | |
727 | int string_lossage = 0; | |
728 | int comment_end = from; | |
729 | int comstart_pos = 0; | |
730 | int comstart_parity = 0; | |
731 | ||
732 | /* At beginning of range to scan, we're outside of strings; | |
733 | that determines quote parity to the comment-end. */ | |
734 | while (from != stop) | |
735 | { | |
736 | /* Move back and examine a character. */ | |
737 | from--; | |
738 | ||
739 | c = FETCH_CHAR (from); | |
740 | code = SYNTAX (c); | |
741 | ||
742 | /* If this char is the second of a 2-char comment sequence, | |
743 | back up and give the pair the appropriate syntax. */ | |
744 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
745 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
746 | { | |
747 | code = Sendcomment; | |
748 | from--; | |
749 | } | |
750 | ||
751 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) | |
752 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
753 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
754 | { | |
755 | code = Scomment; | |
756 | from--; | |
757 | } | |
758 | ||
759 | /* Ignore escaped characters. */ | |
760 | if (char_quoted (from)) | |
761 | continue; | |
762 | ||
763 | /* Track parity of quotes. */ | |
764 | if (code == Sstring) | |
765 | { | |
766 | parity ^= 1; | |
767 | if (my_stringend == 0) | |
768 | my_stringend = c; | |
769 | /* If we have two kinds of string delimiters. | |
770 | There's no way to grok this scanning backwards. */ | |
771 | else if (my_stringend != c) | |
772 | string_lossage = 1; | |
773 | } | |
774 | ||
775 | /* Record comment-starters according to that | |
776 | quote-parity to the comment-end. */ | |
777 | if (code == Scomment) | |
778 | { | |
779 | comstart_parity = parity; | |
780 | comstart_pos = from; | |
781 | } | |
782 | ||
783 | /* If we find another earlier comment-ender, | |
eb8c3be9 | 784 | any comment-starts earlier than that don't count |
b3cfe0c8 RS |
785 | (because they go with the earlier comment-ender). */ |
786 | if (code == Sendcomment | |
787 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
788 | break; | |
789 | ||
790 | /* Assume a defun-start point is outside of strings. */ | |
791 | if (code == Sopen | |
792 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
793 | break; | |
794 | } | |
795 | ||
796 | if (comstart_pos == 0) | |
797 | from = comment_end; | |
798 | /* If the earliest comment starter | |
799 | is followed by uniform paired string quotes or none, | |
800 | we know it can't be inside a string | |
801 | since if it were then the comment ender would be inside one. | |
802 | So it does start a comment. Skip back to it. */ | |
803 | else if (comstart_parity == 0 && !string_lossage) | |
804 | from = comstart_pos; | |
805 | else | |
806 | { | |
807 | /* We had two kinds of string delimiters mixed up | |
808 | together. Decode this going forwards. | |
809 | Scan fwd from the previous comment ender | |
810 | to the one in question; this records where we | |
811 | last passed a comment starter. */ | |
812 | struct lisp_parse_state state; | |
813 | scan_sexps_forward (&state, find_defun_start (comment_end), | |
340f92b5 | 814 | comment_end - 1, -10000, 0, Qnil, 0); |
b3cfe0c8 RS |
815 | if (state.incomment) |
816 | from = state.comstart; | |
817 | else | |
818 | /* We can't grok this as a comment; scan it normally. */ | |
819 | from = comment_end; | |
820 | } | |
821 | } | |
822 | } | |
c81a3712 | 823 | else if ((code != Swhitespace && code != Scomment) || quoted) |
b3cfe0c8 RS |
824 | { |
825 | immediate_quit = 0; | |
c81a3712 | 826 | SET_PT (from + 1); |
b3cfe0c8 RS |
827 | return Qnil; |
828 | } | |
829 | } | |
830 | ||
840f481c | 831 | count1++; |
b3cfe0c8 RS |
832 | } |
833 | ||
834 | SET_PT (from); | |
835 | immediate_quit = 0; | |
836 | return Qt; | |
837 | } | |
838 | \f | |
8489eb67 RS |
839 | int parse_sexp_ignore_comments; |
840 | ||
841 | Lisp_Object | |
842 | scan_lists (from, count, depth, sexpflag) | |
843 | register int from; | |
844 | int count, depth, sexpflag; | |
845 | { | |
846 | Lisp_Object val; | |
847 | register int stop; | |
848 | register int c; | |
849 | char stringterm; | |
850 | int quoted; | |
851 | int mathexit = 0; | |
852 | register enum syntaxcode code; | |
853 | int min_depth = depth; /* Err out if depth gets less than this. */ | |
e5d4f4dc | 854 | int comstyle = 0; /* style of comment encountered */ |
8489eb67 RS |
855 | |
856 | if (depth > 0) min_depth = 0; | |
857 | ||
858 | immediate_quit = 1; | |
859 | QUIT; | |
860 | ||
861 | while (count > 0) | |
862 | { | |
863 | stop = ZV; | |
864 | while (from < stop) | |
865 | { | |
866 | c = FETCH_CHAR (from); | |
e5d4f4dc | 867 | code = SYNTAX (c); |
8489eb67 RS |
868 | from++; |
869 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
870 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from)) | |
871 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
872 | { |
873 | /* we have encountered a comment start sequence and we | |
874 | are ignoring all text inside comments. we must record | |
875 | the comment style this sequence begins so that later, | |
876 | only a comment end of the same style actually ends | |
877 | the comment section */ | |
878 | code = Scomment; | |
879 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
880 | from++; | |
881 | } | |
882 | ||
8489eb67 RS |
883 | if (SYNTAX_PREFIX (c)) |
884 | continue; | |
885 | ||
886 | #ifdef SWITCH_ENUM_BUG | |
887 | switch ((int) code) | |
888 | #else | |
889 | switch (code) | |
890 | #endif | |
891 | { | |
892 | case Sescape: | |
893 | case Scharquote: | |
894 | if (from == stop) goto lose; | |
895 | from++; | |
896 | /* treat following character as a word constituent */ | |
897 | case Sword: | |
898 | case Ssymbol: | |
899 | if (depth || !sexpflag) break; | |
900 | /* This word counts as a sexp; return at end of it. */ | |
901 | while (from < stop) | |
902 | { | |
903 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 904 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 905 | #else |
e5d4f4dc | 906 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
907 | #endif |
908 | { | |
909 | case Scharquote: | |
910 | case Sescape: | |
911 | from++; | |
912 | if (from == stop) goto lose; | |
913 | break; | |
914 | case Sword: | |
915 | case Ssymbol: | |
916 | case Squote: | |
917 | break; | |
918 | default: | |
919 | goto done; | |
920 | } | |
921 | from++; | |
922 | } | |
923 | goto done; | |
924 | ||
925 | case Scomment: | |
926 | if (!parse_sexp_ignore_comments) break; | |
927 | while (1) | |
928 | { | |
929 | if (from == stop) goto done; | |
e5d4f4dc RS |
930 | c = FETCH_CHAR (from); |
931 | if (SYNTAX (c) == Sendcomment | |
932 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
933 | /* we have encountered a comment end of the same style | |
934 | as the comment sequence which began this comment | |
935 | section */ | |
8489eb67 RS |
936 | break; |
937 | from++; | |
938 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
e5d4f4dc RS |
939 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
940 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
941 | /* we have encountered a comment end of the same style | |
942 | as the comment sequence which began this comment | |
943 | section */ | |
8489eb67 RS |
944 | { from++; break; } |
945 | } | |
946 | break; | |
947 | ||
948 | case Smath: | |
949 | if (!sexpflag) | |
950 | break; | |
951 | if (from != stop && c == FETCH_CHAR (from)) | |
952 | from++; | |
953 | if (mathexit) | |
954 | { | |
955 | mathexit = 0; | |
956 | goto close1; | |
957 | } | |
958 | mathexit = 1; | |
959 | ||
960 | case Sopen: | |
961 | if (!++depth) goto done; | |
962 | break; | |
963 | ||
964 | case Sclose: | |
965 | close1: | |
966 | if (!--depth) goto done; | |
967 | if (depth < min_depth) | |
968 | error ("Containing expression ends prematurely"); | |
969 | break; | |
970 | ||
971 | case Sstring: | |
972 | stringterm = FETCH_CHAR (from - 1); | |
973 | while (1) | |
974 | { | |
975 | if (from >= stop) goto lose; | |
976 | if (FETCH_CHAR (from) == stringterm) break; | |
977 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 978 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 979 | #else |
e5d4f4dc | 980 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
981 | #endif |
982 | { | |
983 | case Scharquote: | |
984 | case Sescape: | |
985 | from++; | |
986 | } | |
987 | from++; | |
988 | } | |
989 | from++; | |
990 | if (!depth && sexpflag) goto done; | |
991 | break; | |
992 | } | |
993 | } | |
994 | ||
995 | /* Reached end of buffer. Error if within object, return nil if between */ | |
996 | if (depth) goto lose; | |
997 | ||
998 | immediate_quit = 0; | |
999 | return Qnil; | |
1000 | ||
1001 | /* End of object reached */ | |
1002 | done: | |
1003 | count--; | |
1004 | } | |
1005 | ||
1006 | while (count < 0) | |
1007 | { | |
1008 | stop = BEGV; | |
1009 | while (from > stop) | |
1010 | { | |
1011 | from--; | |
1012 | if (quoted = char_quoted (from)) | |
1013 | from--; | |
1014 | c = FETCH_CHAR (from); | |
1015 | code = SYNTAX (c); | |
1016 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
1017 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
1018 | && !char_quoted (from - 1) | |
1019 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
1020 | { |
1021 | /* we must record the comment style encountered so that | |
1022 | later, we can match only the proper comment begin | |
1023 | sequence of the same style */ | |
1024 | code = Sendcomment; | |
1025 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
1026 | from--; | |
1027 | } | |
1028 | ||
8489eb67 RS |
1029 | if (SYNTAX_PREFIX (c)) |
1030 | continue; | |
1031 | ||
1032 | #ifdef SWITCH_ENUM_BUG | |
1033 | switch ((int) (quoted ? Sword : code)) | |
1034 | #else | |
1035 | switch (quoted ? Sword : code) | |
1036 | #endif | |
1037 | { | |
1038 | case Sword: | |
1039 | case Ssymbol: | |
1040 | if (depth || !sexpflag) break; | |
1041 | /* This word counts as a sexp; count object finished after passing it. */ | |
1042 | while (from > stop) | |
1043 | { | |
1044 | quoted = char_quoted (from - 1); | |
1045 | if (quoted) | |
1046 | from--; | |
e5d4f4dc RS |
1047 | if (! (quoted || SYNTAX (FETCH_CHAR (from - 1)) == Sword |
1048 | || SYNTAX (FETCH_CHAR (from - 1)) == Ssymbol | |
1049 | || SYNTAX (FETCH_CHAR (from - 1)) == Squote)) | |
8489eb67 RS |
1050 | goto done2; |
1051 | from--; | |
1052 | } | |
1053 | goto done2; | |
1054 | ||
1055 | case Smath: | |
1056 | if (!sexpflag) | |
1057 | break; | |
1058 | if (from != stop && c == FETCH_CHAR (from - 1)) | |
1059 | from--; | |
1060 | if (mathexit) | |
1061 | { | |
1062 | mathexit = 0; | |
1063 | goto open2; | |
1064 | } | |
1065 | mathexit = 1; | |
1066 | ||
1067 | case Sclose: | |
1068 | if (!++depth) goto done2; | |
1069 | break; | |
1070 | ||
1071 | case Sopen: | |
1072 | open2: | |
1073 | if (!--depth) goto done2; | |
1074 | if (depth < min_depth) | |
1075 | error ("Containing expression ends prematurely"); | |
1076 | break; | |
1077 | ||
1078 | case Sendcomment: | |
1079 | if (!parse_sexp_ignore_comments) | |
1080 | break; | |
8f9dc2ed | 1081 | #if 0 |
37bef230 RS |
1082 | if (code != SYNTAX (c)) |
1083 | /* For a two-char comment ender, we can assume | |
1084 | it does end a comment. So scan back in a simple way. */ | |
1085 | { | |
1086 | if (from != stop) from--; | |
1087 | while (1) | |
1088 | { | |
1089 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
1090 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
1091 | break; | |
1092 | if (from == stop) goto done; | |
1093 | from--; | |
1094 | if (SYNTAX_COMSTART_SECOND (c) | |
1095 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
1096 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
1097 | && !char_quoted (from)) | |
1098 | break; | |
1099 | } | |
1100 | break; | |
1101 | } | |
8f9dc2ed | 1102 | #endif /* 0 */ |
37bef230 | 1103 | |
8489eb67 RS |
1104 | /* Look back, counting the parity of string-quotes, |
1105 | and recording the comment-starters seen. | |
1106 | When we reach a safe place, assume that's not in a string; | |
1107 | then step the main scan to the earliest comment-starter seen | |
1108 | an even number of string quotes away from the safe place. | |
1109 | ||
1110 | OFROM[I] is position of the earliest comment-starter seen | |
1111 | which is I+2X quotes from the comment-end. | |
1112 | PARITY is current parity of quotes from the comment end. */ | |
1113 | { | |
8489eb67 | 1114 | int parity = 0; |
e5d4f4dc RS |
1115 | char my_stringend = 0; |
1116 | int string_lossage = 0; | |
1117 | int comment_end = from; | |
37bef230 RS |
1118 | int comstart_pos = 0; |
1119 | int comstart_parity = 0; | |
8489eb67 RS |
1120 | |
1121 | /* At beginning of range to scan, we're outside of strings; | |
1122 | that determines quote parity to the comment-end. */ | |
1123 | while (from != stop) | |
1124 | { | |
1125 | /* Move back and examine a character. */ | |
1126 | from--; | |
1127 | ||
1128 | c = FETCH_CHAR (from); | |
1129 | code = SYNTAX (c); | |
1130 | ||
1131 | /* If this char is the second of a 2-char comment sequence, | |
1132 | back up and give the pair the appropriate syntax. */ | |
1133 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
1134 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
e5d4f4dc RS |
1135 | { |
1136 | code = Sendcomment; | |
1137 | from--; | |
1138 | } | |
1139 | ||
8489eb67 | 1140 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) |
e5d4f4dc RS |
1141 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) |
1142 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
1143 | { | |
1144 | code = Scomment; | |
1145 | from--; | |
1146 | } | |
8489eb67 RS |
1147 | |
1148 | /* Ignore escaped characters. */ | |
1149 | if (char_quoted (from)) | |
1150 | continue; | |
1151 | ||
37bef230 | 1152 | /* Track parity of quotes. */ |
8489eb67 | 1153 | if (code == Sstring) |
e5d4f4dc RS |
1154 | { |
1155 | parity ^= 1; | |
1156 | if (my_stringend == 0) | |
1157 | my_stringend = c; | |
37bef230 | 1158 | /* If we have two kinds of string delimiters. |
e5d4f4dc RS |
1159 | There's no way to grok this scanning backwards. */ |
1160 | else if (my_stringend != c) | |
1161 | string_lossage = 1; | |
1162 | } | |
8489eb67 RS |
1163 | |
1164 | /* Record comment-starters according to that | |
1165 | quote-parity to the comment-end. */ | |
1166 | if (code == Scomment) | |
37bef230 RS |
1167 | { |
1168 | comstart_parity = parity; | |
1169 | comstart_pos = from; | |
1170 | } | |
8489eb67 | 1171 | |
37bef230 | 1172 | /* If we find another earlier comment-ender, |
eb8c3be9 | 1173 | any comment-starts earlier than that don't count |
37bef230 | 1174 | (because they go with the earlier comment-ender). */ |
e5d4f4dc RS |
1175 | if (code == Sendcomment |
1176 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
8489eb67 | 1177 | break; |
37bef230 RS |
1178 | |
1179 | /* Assume a defun-start point is outside of strings. */ | |
1180 | if (code == Sopen | |
1181 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
1182 | break; | |
8489eb67 | 1183 | } |
37bef230 RS |
1184 | |
1185 | if (comstart_pos == 0) | |
1186 | from = comment_end; | |
1187 | /* If the earliest comment starter | |
1188 | is followed by uniform paired string quotes or none, | |
1189 | we know it can't be inside a string | |
1190 | since if it were then the comment ender would be inside one. | |
1191 | So it does start a comment. Skip back to it. */ | |
1192 | else if (comstart_parity == 0 && !string_lossage) | |
1193 | from = comstart_pos; | |
1194 | else | |
e5d4f4dc RS |
1195 | { |
1196 | /* We had two kinds of string delimiters mixed up | |
1197 | together. Decode this going forwards. | |
1198 | Scan fwd from the previous comment ender | |
1199 | to the one in question; this records where we | |
1200 | last passed a comment starter. */ | |
1201 | struct lisp_parse_state state; | |
37bef230 | 1202 | scan_sexps_forward (&state, find_defun_start (comment_end), |
340f92b5 | 1203 | comment_end - 1, -10000, 0, Qnil, 0); |
e5d4f4dc RS |
1204 | if (state.incomment) |
1205 | from = state.comstart; | |
1206 | else | |
1207 | /* We can't grok this as a comment; scan it normally. */ | |
1208 | from = comment_end; | |
1209 | } | |
8489eb67 RS |
1210 | } |
1211 | break; | |
1212 | ||
1213 | case Sstring: | |
1214 | stringterm = FETCH_CHAR (from); | |
1215 | while (1) | |
1216 | { | |
1217 | if (from == stop) goto lose; | |
1218 | if (!char_quoted (from - 1) | |
1219 | && stringterm == FETCH_CHAR (from - 1)) | |
1220 | break; | |
1221 | from--; | |
1222 | } | |
1223 | from--; | |
1224 | if (!depth && sexpflag) goto done2; | |
1225 | break; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | /* Reached start of buffer. Error if within object, return nil if between */ | |
1230 | if (depth) goto lose; | |
1231 | ||
1232 | immediate_quit = 0; | |
1233 | return Qnil; | |
1234 | ||
1235 | done2: | |
1236 | count++; | |
1237 | } | |
1238 | ||
1239 | ||
1240 | immediate_quit = 0; | |
1241 | XFASTINT (val) = from; | |
1242 | return val; | |
1243 | ||
1244 | lose: | |
1245 | error ("Unbalanced parentheses"); | |
1246 | /* NOTREACHED */ | |
1247 | } | |
1248 | ||
340f92b5 | 1249 | static int |
8489eb67 RS |
1250 | char_quoted (pos) |
1251 | register int pos; | |
1252 | { | |
1253 | register enum syntaxcode code; | |
1254 | register int beg = BEGV; | |
1255 | register int quoted = 0; | |
1256 | ||
1257 | while (pos > beg | |
1258 | && ((code = SYNTAX (FETCH_CHAR (pos - 1))) == Scharquote | |
1259 | || code == Sescape)) | |
1260 | pos--, quoted = !quoted; | |
1261 | return quoted; | |
1262 | } | |
1263 | ||
1264 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, | |
1265 | "Scan from character number FROM by COUNT lists.\n\ | |
1266 | Returns the character number of the position thus found.\n\ | |
1267 | \n\ | |
1268 | If DEPTH is nonzero, paren depth begins counting from that value,\n\ | |
1269 | only places where the depth in parentheses becomes zero\n\ | |
1270 | are candidates for stopping; COUNT such places are counted.\n\ | |
1271 | Thus, a positive value for DEPTH means go out levels.\n\ | |
1272 | \n\ | |
1273 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
1274 | \n\ | |
1275 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
1276 | and the depth is wrong, an error is signaled.\n\ | |
1277 | If the depth is right but the count is not used up, nil is returned.") | |
1278 | (from, count, depth) | |
1279 | Lisp_Object from, count, depth; | |
1280 | { | |
1281 | CHECK_NUMBER (from, 0); | |
1282 | CHECK_NUMBER (count, 1); | |
1283 | CHECK_NUMBER (depth, 2); | |
1284 | ||
1285 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
1286 | } | |
1287 | ||
1288 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
1289 | "Scan from character number FROM by COUNT balanced expressions.\n\ | |
1290 | If COUNT is negative, scan backwards.\n\ | |
1291 | Returns the character number of the position thus found.\n\ | |
1292 | \n\ | |
1293 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
1294 | \n\ | |
1295 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
1296 | in the middle of a parenthetical grouping, an error is signaled.\n\ | |
1297 | If the beginning or end is reached between groupings\n\ | |
1298 | but before count is used up, nil is returned.") | |
1299 | (from, count) | |
1300 | Lisp_Object from, count; | |
1301 | { | |
1302 | CHECK_NUMBER (from, 0); | |
1303 | CHECK_NUMBER (count, 1); | |
1304 | ||
1305 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
1306 | } | |
1307 | ||
1308 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
1309 | 0, 0, 0, | |
1310 | "Move point backward over any number of chars with prefix syntax.\n\ | |
1311 | This includes chars with \"quote\" or \"prefix\" syntax (' or p).") | |
1312 | () | |
1313 | { | |
1314 | int beg = BEGV; | |
1315 | int pos = point; | |
1316 | ||
1317 | while (pos > beg && !char_quoted (pos - 1) | |
1318 | && (SYNTAX (FETCH_CHAR (pos - 1)) == Squote | |
1319 | || SYNTAX_PREFIX (FETCH_CHAR (pos - 1)))) | |
1320 | pos--; | |
1321 | ||
1322 | SET_PT (pos); | |
1323 | ||
1324 | return Qnil; | |
1325 | } | |
1326 | \f | |
8489eb67 | 1327 | /* Parse forward from FROM to END, |
e5d4f4dc RS |
1328 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
1329 | and return a description of the state of the parse at END. | |
c81a3712 RS |
1330 | If STOPBEFORE is nonzero, stop at the start of an atom. |
1331 | If COMMENTSTOP is nonzero, stop at the start of a comment. */ | |
8489eb67 | 1332 | |
340f92b5 | 1333 | static void |
c81a3712 RS |
1334 | scan_sexps_forward (stateptr, from, end, targetdepth, |
1335 | stopbefore, oldstate, commentstop) | |
e5d4f4dc | 1336 | struct lisp_parse_state *stateptr; |
8489eb67 RS |
1337 | register int from; |
1338 | int end, targetdepth, stopbefore; | |
1339 | Lisp_Object oldstate; | |
c81a3712 | 1340 | int commentstop; |
8489eb67 RS |
1341 | { |
1342 | struct lisp_parse_state state; | |
1343 | ||
1344 | register enum syntaxcode code; | |
1345 | struct level { int last, prev; }; | |
1346 | struct level levelstart[100]; | |
1347 | register struct level *curlevel = levelstart; | |
1348 | struct level *endlevel = levelstart + 100; | |
1349 | char prev; | |
1350 | register int depth; /* Paren depth of current scanning location. | |
1351 | level - levelstart equals this except | |
1352 | when the depth becomes negative. */ | |
1353 | int mindepth; /* Lowest DEPTH value seen. */ | |
1354 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
1355 | Lisp_Object tem; | |
1356 | ||
1357 | immediate_quit = 1; | |
1358 | QUIT; | |
1359 | ||
265a9e55 | 1360 | if (NILP (oldstate)) |
8489eb67 RS |
1361 | { |
1362 | depth = 0; | |
1363 | state.instring = -1; | |
1364 | state.incomment = 0; | |
e5d4f4dc | 1365 | state.comstyle = 0; /* comment style a by default */ |
8489eb67 RS |
1366 | } |
1367 | else | |
1368 | { | |
1369 | tem = Fcar (oldstate); | |
265a9e55 | 1370 | if (!NILP (tem)) |
8489eb67 RS |
1371 | depth = XINT (tem); |
1372 | else | |
1373 | depth = 0; | |
1374 | ||
1375 | oldstate = Fcdr (oldstate); | |
1376 | oldstate = Fcdr (oldstate); | |
1377 | oldstate = Fcdr (oldstate); | |
1378 | tem = Fcar (oldstate); | |
265a9e55 | 1379 | state.instring = !NILP (tem) ? XINT (tem) : -1; |
8489eb67 RS |
1380 | |
1381 | oldstate = Fcdr (oldstate); | |
1382 | tem = Fcar (oldstate); | |
265a9e55 | 1383 | state.incomment = !NILP (tem); |
8489eb67 RS |
1384 | |
1385 | oldstate = Fcdr (oldstate); | |
1386 | tem = Fcar (oldstate); | |
265a9e55 | 1387 | start_quoted = !NILP (tem); |
e5d4f4dc RS |
1388 | |
1389 | /* if the eight element of the list is nil, we are in comment | |
1390 | style a. if it is non-nil, we are in comment style b */ | |
1391 | oldstate = Fcdr (oldstate); | |
1392 | oldstate = Fcdr (oldstate); | |
e5d4f4dc RS |
1393 | tem = Fcar (oldstate); |
1394 | state.comstyle = !NILP (tem); | |
8489eb67 RS |
1395 | } |
1396 | state.quoted = 0; | |
1397 | mindepth = depth; | |
1398 | ||
1399 | curlevel->prev = -1; | |
1400 | curlevel->last = -1; | |
1401 | ||
1402 | /* Enter the loop at a place appropriate for initial state. */ | |
1403 | ||
1404 | if (state.incomment) goto startincomment; | |
1405 | if (state.instring >= 0) | |
1406 | { | |
1407 | if (start_quoted) goto startquotedinstring; | |
1408 | goto startinstring; | |
1409 | } | |
1410 | if (start_quoted) goto startquoted; | |
1411 | ||
1412 | while (from < end) | |
1413 | { | |
e5d4f4dc | 1414 | code = SYNTAX (FETCH_CHAR (from)); |
8489eb67 | 1415 | from++; |
8f9dc2ed RS |
1416 | if (code == Scomment) |
1417 | state.comstart = from-1; | |
1418 | ||
1419 | else if (from < end && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
1420 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
e5d4f4dc RS |
1421 | { |
1422 | /* Record the comment style we have entered so that only | |
1423 | the comment-end sequence of the same style actually | |
1424 | terminates the comment section. */ | |
1425 | code = Scomment; | |
1426 | state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
8f9dc2ed | 1427 | state.comstart = from-1; |
e5d4f4dc RS |
1428 | from++; |
1429 | } | |
1430 | ||
8489eb67 RS |
1431 | if (SYNTAX_PREFIX (FETCH_CHAR (from - 1))) |
1432 | continue; | |
1433 | #ifdef SWITCH_ENUM_BUG | |
1434 | switch ((int) code) | |
1435 | #else | |
1436 | switch (code) | |
1437 | #endif | |
1438 | { | |
1439 | case Sescape: | |
1440 | case Scharquote: | |
1441 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1442 | curlevel->last = from - 1; | |
1443 | startquoted: | |
1444 | if (from == end) goto endquoted; | |
1445 | from++; | |
1446 | goto symstarted; | |
1447 | /* treat following character as a word constituent */ | |
1448 | case Sword: | |
1449 | case Ssymbol: | |
1450 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1451 | curlevel->last = from - 1; | |
1452 | symstarted: | |
1453 | while (from < end) | |
1454 | { | |
1455 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1456 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1457 | #else |
e5d4f4dc | 1458 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1459 | #endif |
1460 | { | |
1461 | case Scharquote: | |
1462 | case Sescape: | |
1463 | from++; | |
1464 | if (from == end) goto endquoted; | |
1465 | break; | |
1466 | case Sword: | |
1467 | case Ssymbol: | |
1468 | case Squote: | |
1469 | break; | |
1470 | default: | |
1471 | goto symdone; | |
1472 | } | |
1473 | from++; | |
1474 | } | |
1475 | symdone: | |
1476 | curlevel->prev = curlevel->last; | |
1477 | break; | |
1478 | ||
1479 | case Scomment: | |
1480 | state.incomment = 1; | |
1481 | startincomment: | |
c81a3712 RS |
1482 | if (commentstop) |
1483 | goto done; | |
8489eb67 RS |
1484 | while (1) |
1485 | { | |
1486 | if (from == end) goto done; | |
e5d4f4dc RS |
1487 | prev = FETCH_CHAR (from); |
1488 | if (SYNTAX (prev) == Sendcomment | |
1489 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1490 | /* Only terminate the comment section if the endcomment | |
1491 | of the same style as the start sequence has been | |
1492 | encountered. */ | |
8489eb67 RS |
1493 | break; |
1494 | from++; | |
1495 | if (from < end && SYNTAX_COMEND_FIRST (prev) | |
e5d4f4dc RS |
1496 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
1497 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1498 | /* Only terminate the comment section if the end-comment | |
1499 | sequence of the same style as the start sequence has | |
1500 | been encountered. */ | |
8489eb67 RS |
1501 | { from++; break; } |
1502 | } | |
1503 | state.incomment = 0; | |
e5d4f4dc | 1504 | state.comstyle = 0; /* reset the comment style */ |
8489eb67 RS |
1505 | break; |
1506 | ||
1507 | case Sopen: | |
1508 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1509 | depth++; | |
1510 | /* curlevel++->last ran into compiler bug on Apollo */ | |
1511 | curlevel->last = from - 1; | |
1512 | if (++curlevel == endlevel) | |
1513 | error ("Nesting too deep for parser"); | |
1514 | curlevel->prev = -1; | |
1515 | curlevel->last = -1; | |
1516 | if (!--targetdepth) goto done; | |
1517 | break; | |
1518 | ||
1519 | case Sclose: | |
1520 | depth--; | |
1521 | if (depth < mindepth) | |
1522 | mindepth = depth; | |
1523 | if (curlevel != levelstart) | |
1524 | curlevel--; | |
1525 | curlevel->prev = curlevel->last; | |
1526 | if (!++targetdepth) goto done; | |
1527 | break; | |
1528 | ||
1529 | case Sstring: | |
1530 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1531 | curlevel->last = from - 1; | |
1532 | state.instring = FETCH_CHAR (from - 1); | |
1533 | startinstring: | |
1534 | while (1) | |
1535 | { | |
1536 | if (from >= end) goto done; | |
1537 | if (FETCH_CHAR (from) == state.instring) break; | |
1538 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1539 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1540 | #else |
e5d4f4dc | 1541 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1542 | #endif |
1543 | { | |
1544 | case Scharquote: | |
1545 | case Sescape: | |
1546 | from++; | |
1547 | startquotedinstring: | |
1548 | if (from >= end) goto endquoted; | |
1549 | } | |
1550 | from++; | |
1551 | } | |
1552 | state.instring = -1; | |
1553 | curlevel->prev = curlevel->last; | |
1554 | from++; | |
1555 | break; | |
1556 | ||
1557 | case Smath: | |
1558 | break; | |
1559 | } | |
1560 | } | |
1561 | goto done; | |
1562 | ||
1563 | stop: /* Here if stopping before start of sexp. */ | |
1564 | from--; /* We have just fetched the char that starts it; */ | |
1565 | goto done; /* but return the position before it. */ | |
1566 | ||
1567 | endquoted: | |
1568 | state.quoted = 1; | |
1569 | done: | |
1570 | state.depth = depth; | |
1571 | state.mindepth = mindepth; | |
1572 | state.thislevelstart = curlevel->prev; | |
1573 | state.prevlevelstart | |
1574 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
1575 | state.location = from; | |
1576 | immediate_quit = 0; | |
1577 | ||
e5d4f4dc | 1578 | *stateptr = state; |
8489eb67 RS |
1579 | } |
1580 | ||
1581 | /* This comment supplies the doc string for parse-partial-sexp, | |
1582 | for make-docfile to see. We cannot put this in the real DEFUN | |
1583 | due to limits in the Unix cpp. | |
1584 | ||
c81a3712 | 1585 | DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0, |
8489eb67 RS |
1586 | "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\ |
1587 | Parsing stops at TO or when certain criteria are met;\n\ | |
1588 | point is set to where parsing stops.\n\ | |
1589 | If fifth arg STATE is omitted or nil,\n\ | |
1590 | parsing assumes that FROM is the beginning of a function.\n\ | |
e5d4f4dc | 1591 | Value is a list of eight elements describing final state of parsing:\n\ |
af50f9e5 RS |
1592 | 0. depth in parens.\n\ |
1593 | 1. character address of start of innermost containing list; nil if none.\n\ | |
1594 | 2. character address of start of last complete sexp terminated.\n\ | |
1595 | 3. non-nil if inside a string.\n\ | |
8489eb67 | 1596 | (it is the character that will terminate the string.)\n\ |
af50f9e5 RS |
1597 | 4. t if inside a comment.\n\ |
1598 | 5. t if following a quote character.\n\ | |
1599 | 6. the minimum paren-depth encountered during this scan.\n\ | |
1600 | 7. t if in a comment of style `b'.\n\ | |
8489eb67 RS |
1601 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\ |
1602 | in parentheses becomes equal to TARGETDEPTH.\n\ | |
1603 | Fourth arg STOPBEFORE non-nil means stop when come to\n\ | |
1604 | any character that starts a sexp.\n\ | |
ec11639d | 1605 | Fifth arg STATE is an eight-list like what this function returns.\n\ |
a4275ad1 | 1606 | It is used to initialize the state of the parse. Its second and third |
c81a3712 RS |
1607 | elements are ignored. |
1608 | Sixth args COMMENTSTOP non-nil means stop at the start of a comment.") | |
1609 | (from, to, targetdepth, stopbefore, state, commentstop) | |
8489eb67 RS |
1610 | */ |
1611 | ||
c81a3712 | 1612 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
8489eb67 | 1613 | 0 /* See immediately above */) |
c81a3712 RS |
1614 | (from, to, targetdepth, stopbefore, oldstate, commentstop) |
1615 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; | |
8489eb67 RS |
1616 | { |
1617 | struct lisp_parse_state state; | |
1618 | int target; | |
1619 | ||
265a9e55 | 1620 | if (!NILP (targetdepth)) |
8489eb67 RS |
1621 | { |
1622 | CHECK_NUMBER (targetdepth, 3); | |
1623 | target = XINT (targetdepth); | |
1624 | } | |
1625 | else | |
1626 | target = -100000; /* We won't reach this depth */ | |
1627 | ||
1628 | validate_region (&from, &to); | |
e5d4f4dc | 1629 | scan_sexps_forward (&state, XINT (from), XINT (to), |
c81a3712 RS |
1630 | target, !NILP (stopbefore), oldstate, |
1631 | !NILP (commentstop)); | |
8489eb67 RS |
1632 | |
1633 | SET_PT (state.location); | |
1634 | ||
1635 | return Fcons (make_number (state.depth), | |
1636 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
1637 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
1638 | Fcons (state.instring >= 0 ? make_number (state.instring) : Qnil, | |
1639 | Fcons (state.incomment ? Qt : Qnil, | |
1640 | Fcons (state.quoted ? Qt : Qnil, | |
e5d4f4dc RS |
1641 | Fcons (make_number (state.mindepth), |
1642 | Fcons (state.comstyle ? Qt : Qnil, | |
1643 | Qnil)))))))); | |
8489eb67 RS |
1644 | } |
1645 | \f | |
1646 | init_syntax_once () | |
1647 | { | |
1648 | register int i; | |
1649 | register struct Lisp_Vector *v; | |
1650 | ||
1651 | /* Set this now, so first buffer creation can refer to it. */ | |
1652 | /* Make it nil before calling copy-syntax-table | |
1653 | so that copy-syntax-table will know not to try to copy from garbage */ | |
1654 | Vstandard_syntax_table = Qnil; | |
1655 | Vstandard_syntax_table = Fcopy_syntax_table (Qnil); | |
1656 | ||
1657 | v = XVECTOR (Vstandard_syntax_table); | |
1658 | ||
1659 | for (i = 'a'; i <= 'z'; i++) | |
1660 | XFASTINT (v->contents[i]) = (int) Sword; | |
1661 | for (i = 'A'; i <= 'Z'; i++) | |
1662 | XFASTINT (v->contents[i]) = (int) Sword; | |
1663 | for (i = '0'; i <= '9'; i++) | |
1664 | XFASTINT (v->contents[i]) = (int) Sword; | |
1665 | XFASTINT (v->contents['$']) = (int) Sword; | |
1666 | XFASTINT (v->contents['%']) = (int) Sword; | |
1667 | ||
1668 | XFASTINT (v->contents['(']) = (int) Sopen + (')' << 8); | |
1669 | XFASTINT (v->contents[')']) = (int) Sclose + ('(' << 8); | |
1670 | XFASTINT (v->contents['[']) = (int) Sopen + (']' << 8); | |
1671 | XFASTINT (v->contents[']']) = (int) Sclose + ('[' << 8); | |
1672 | XFASTINT (v->contents['{']) = (int) Sopen + ('}' << 8); | |
1673 | XFASTINT (v->contents['}']) = (int) Sclose + ('{' << 8); | |
1674 | XFASTINT (v->contents['"']) = (int) Sstring; | |
1675 | XFASTINT (v->contents['\\']) = (int) Sescape; | |
1676 | ||
1677 | for (i = 0; i < 10; i++) | |
1678 | XFASTINT (v->contents["_-+*/&|<>="[i]]) = (int) Ssymbol; | |
1679 | ||
1680 | for (i = 0; i < 12; i++) | |
1681 | XFASTINT (v->contents[".,;:?!#@~^'`"[i]]) = (int) Spunct; | |
1682 | } | |
1683 | ||
1684 | syms_of_syntax () | |
1685 | { | |
1686 | Qsyntax_table_p = intern ("syntax-table-p"); | |
1687 | staticpro (&Qsyntax_table_p); | |
1688 | ||
1689 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, | |
1690 | "Non-nil means `forward-sexp', etc., should treat comments as whitespace."); | |
1691 | ||
1692 | words_include_escapes = 0; | |
1693 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
1694 | "Non-nil means `forward-word', etc., should treat escape chars part of words."); | |
1695 | ||
1696 | defsubr (&Ssyntax_table_p); | |
1697 | defsubr (&Ssyntax_table); | |
1698 | defsubr (&Sstandard_syntax_table); | |
1699 | defsubr (&Scopy_syntax_table); | |
1700 | defsubr (&Sset_syntax_table); | |
1701 | defsubr (&Schar_syntax); | |
1702 | defsubr (&Smodify_syntax_entry); | |
1703 | defsubr (&Sdescribe_syntax); | |
1704 | ||
1705 | defsubr (&Sforward_word); | |
1706 | ||
b3cfe0c8 | 1707 | defsubr (&Sforward_comment); |
8489eb67 RS |
1708 | defsubr (&Sscan_lists); |
1709 | defsubr (&Sscan_sexps); | |
1710 | defsubr (&Sbackward_prefix_chars); | |
1711 | defsubr (&Sparse_partial_sexp); | |
1712 | } |