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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 | ||
18160b98 | 21 | #include <config.h> |
8489eb67 RS |
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\ | |
abae13bd | 243 | < comment starter. > comment ender.\n\ |
32676c08 | 244 | / character-quote.\n\ |
abae13bd | 245 | \n\ |
8489eb67 RS |
246 | Only single-character comment start and end sequences are represented thus.\n\ |
247 | Two-character sequences are represented as described below.\n\ | |
248 | The second character of S is the matching parenthesis,\n\ | |
249 | used only if the first character is `(' or `)'.\n\ | |
250 | Any additional characters are flags.\n\ | |
e5d4f4dc | 251 | Defined flags are the characters 1, 2, 3, 4, b, and p.\n\ |
8489eb67 RS |
252 | 1 means C is the start of a two-char comment start sequence.\n\ |
253 | 2 means C is the second character of such a sequence.\n\ | |
254 | 3 means C is the start of a two-char comment end sequence.\n\ | |
255 | 4 means C is the second character of such a sequence.\n\ | |
e5d4f4dc RS |
256 | \n\ |
257 | There can be up to two orthogonal comment sequences. This is to support\n\ | |
258 | language modes such as C++. By default, all comment sequences are of style\n\ | |
abae13bd RS |
259 | a, but you can set the comment sequence style to b (on the second character\n\ |
260 | of a comment-start, or the first character of a comment-end sequence) using\n\ | |
e5d4f4dc RS |
261 | this flag:\n\ |
262 | b means C is part of comment sequence b.\n\ | |
263 | \n\ | |
264 | p means C is a prefix character for `backward-prefix-chars';\n\ | |
265 | such characters are treated as whitespace when they occur\n\ | |
8489eb67 | 266 | between expressions.") |
2fcea188 | 267 | (char, s, table) |
8489eb67 RS |
268 | */ |
269 | ||
270 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, | |
271 | /* I really don't know why this is interactive | |
272 | help-form should at least be made useful whilst reading the second arg | |
273 | */ | |
274 | "cSet syntax for character: \nsSet syntax for %s to: ", | |
275 | 0 /* See immediately above */) | |
276 | (c, newentry, syntax_table) | |
277 | Lisp_Object c, newentry, syntax_table; | |
278 | { | |
279 | register unsigned char *p, match; | |
280 | register enum syntaxcode code; | |
281 | Lisp_Object val; | |
282 | ||
283 | CHECK_NUMBER (c, 0); | |
284 | CHECK_STRING (newentry, 1); | |
265a9e55 | 285 | if (NILP (syntax_table)) |
8489eb67 RS |
286 | syntax_table = current_buffer->syntax_table; |
287 | else | |
288 | syntax_table = check_syntax_table (syntax_table); | |
289 | ||
290 | p = XSTRING (newentry)->data; | |
291 | code = (enum syntaxcode) syntax_spec_code[*p++]; | |
292 | if (((int) code & 0377) == 0377) | |
293 | error ("invalid syntax description letter: %c", c); | |
294 | ||
295 | match = *p; | |
296 | if (match) p++; | |
297 | if (match == ' ') match = 0; | |
298 | ||
299 | XFASTINT (val) = (match << 8) + (int) code; | |
300 | while (*p) | |
301 | switch (*p++) | |
302 | { | |
303 | case '1': | |
304 | XFASTINT (val) |= 1 << 16; | |
305 | break; | |
306 | ||
307 | case '2': | |
308 | XFASTINT (val) |= 1 << 17; | |
309 | break; | |
310 | ||
311 | case '3': | |
312 | XFASTINT (val) |= 1 << 18; | |
313 | break; | |
314 | ||
315 | case '4': | |
316 | XFASTINT (val) |= 1 << 19; | |
317 | break; | |
318 | ||
319 | case 'p': | |
320 | XFASTINT (val) |= 1 << 20; | |
321 | break; | |
e5d4f4dc RS |
322 | |
323 | case 'b': | |
324 | XFASTINT (val) |= 1 << 21; | |
325 | break; | |
8489eb67 RS |
326 | } |
327 | ||
328 | XVECTOR (syntax_table)->contents[0xFF & XINT (c)] = val; | |
329 | ||
330 | return Qnil; | |
331 | } | |
332 | \f | |
333 | /* Dump syntax table to buffer in human-readable format */ | |
334 | ||
340f92b5 | 335 | static void |
8489eb67 RS |
336 | describe_syntax (value) |
337 | Lisp_Object value; | |
338 | { | |
339 | register enum syntaxcode code; | |
e5d4f4dc | 340 | char desc, match, start1, start2, end1, end2, prefix, comstyle; |
8489eb67 RS |
341 | char str[2]; |
342 | ||
343 | Findent_to (make_number (16), make_number (1)); | |
344 | ||
345 | if (XTYPE (value) != Lisp_Int) | |
346 | { | |
347 | insert_string ("invalid"); | |
348 | return; | |
349 | } | |
350 | ||
351 | code = (enum syntaxcode) (XINT (value) & 0377); | |
352 | match = (XINT (value) >> 8) & 0377; | |
353 | start1 = (XINT (value) >> 16) & 1; | |
354 | start2 = (XINT (value) >> 17) & 1; | |
355 | end1 = (XINT (value) >> 18) & 1; | |
356 | end2 = (XINT (value) >> 19) & 1; | |
357 | prefix = (XINT (value) >> 20) & 1; | |
e5d4f4dc | 358 | comstyle = (XINT (value) >> 21) & 1; |
8489eb67 RS |
359 | |
360 | if ((int) code < 0 || (int) code >= (int) Smax) | |
361 | { | |
362 | insert_string ("invalid"); | |
363 | return; | |
364 | } | |
365 | desc = syntax_code_spec[(int) code]; | |
366 | ||
367 | str[0] = desc, str[1] = 0; | |
368 | insert (str, 1); | |
369 | ||
370 | str[0] = match ? match : ' '; | |
371 | insert (str, 1); | |
372 | ||
373 | ||
374 | if (start1) | |
375 | insert ("1", 1); | |
376 | if (start2) | |
377 | insert ("2", 1); | |
378 | ||
379 | if (end1) | |
380 | insert ("3", 1); | |
381 | if (end2) | |
382 | insert ("4", 1); | |
383 | ||
384 | if (prefix) | |
385 | insert ("p", 1); | |
e5d4f4dc RS |
386 | if (comstyle) |
387 | insert ("b", 1); | |
8489eb67 RS |
388 | |
389 | insert_string ("\twhich means: "); | |
390 | ||
391 | #ifdef SWITCH_ENUM_BUG | |
392 | switch ((int) code) | |
393 | #else | |
394 | switch (code) | |
395 | #endif | |
396 | { | |
397 | case Swhitespace: | |
398 | insert_string ("whitespace"); break; | |
399 | case Spunct: | |
400 | insert_string ("punctuation"); break; | |
401 | case Sword: | |
402 | insert_string ("word"); break; | |
403 | case Ssymbol: | |
404 | insert_string ("symbol"); break; | |
405 | case Sopen: | |
406 | insert_string ("open"); break; | |
407 | case Sclose: | |
408 | insert_string ("close"); break; | |
409 | case Squote: | |
410 | insert_string ("quote"); break; | |
411 | case Sstring: | |
412 | insert_string ("string"); break; | |
413 | case Smath: | |
414 | insert_string ("math"); break; | |
415 | case Sescape: | |
416 | insert_string ("escape"); break; | |
417 | case Scharquote: | |
418 | insert_string ("charquote"); break; | |
419 | case Scomment: | |
420 | insert_string ("comment"); break; | |
421 | case Sendcomment: | |
422 | insert_string ("endcomment"); break; | |
423 | default: | |
424 | insert_string ("invalid"); | |
425 | return; | |
426 | } | |
427 | ||
428 | if (match) | |
429 | { | |
430 | insert_string (", matches "); | |
410e16ff | 431 | insert_char (match); |
8489eb67 RS |
432 | } |
433 | ||
434 | if (start1) | |
435 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
436 | if (start2) | |
437 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
438 | ||
439 | if (end1) | |
440 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
441 | if (end2) | |
442 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
443 | if (comstyle) |
444 | insert_string (" (comment style b)"); | |
445 | ||
8489eb67 RS |
446 | if (prefix) |
447 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
448 | ||
449 | insert_string ("\n"); | |
450 | } | |
451 | ||
340f92b5 | 452 | static Lisp_Object |
8489eb67 RS |
453 | describe_syntax_1 (vector) |
454 | Lisp_Object vector; | |
455 | { | |
456 | struct buffer *old = current_buffer; | |
457 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
b3cfe0c8 | 458 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil); |
8489eb67 RS |
459 | set_buffer_internal (old); |
460 | return Qnil; | |
461 | } | |
462 | ||
463 | DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "", | |
464 | "Describe the syntax specifications in the syntax table.\n\ | |
465 | The descriptions are inserted in a buffer, which is then displayed.") | |
466 | () | |
467 | { | |
468 | internal_with_output_to_temp_buffer | |
469 | ("*Help*", describe_syntax_1, current_buffer->syntax_table); | |
470 | ||
471 | return Qnil; | |
472 | } | |
473 | \f | |
474 | /* Return the position across COUNT words from FROM. | |
475 | If that many words cannot be found before the end of the buffer, return 0. | |
476 | COUNT negative means scan backward and stop at word beginning. */ | |
477 | ||
478 | scan_words (from, count) | |
479 | register int from, count; | |
480 | { | |
481 | register int beg = BEGV; | |
482 | register int end = ZV; | |
483 | register int code; | |
484 | ||
485 | immediate_quit = 1; | |
486 | QUIT; | |
487 | ||
488 | while (count > 0) | |
489 | { | |
490 | while (1) | |
491 | { | |
492 | if (from == end) | |
493 | { | |
494 | immediate_quit = 0; | |
495 | return 0; | |
496 | } | |
497 | code = SYNTAX (FETCH_CHAR (from)); | |
498 | if (words_include_escapes | |
499 | && (code == Sescape || code == Scharquote)) | |
500 | break; | |
501 | if (code == Sword) | |
502 | break; | |
503 | from++; | |
504 | } | |
505 | while (1) | |
506 | { | |
507 | if (from == end) break; | |
508 | code = SYNTAX (FETCH_CHAR (from)); | |
509 | if (!(words_include_escapes | |
510 | && (code == Sescape || code == Scharquote))) | |
511 | if (code != Sword) | |
512 | break; | |
513 | from++; | |
514 | } | |
515 | count--; | |
516 | } | |
517 | while (count < 0) | |
518 | { | |
519 | while (1) | |
520 | { | |
521 | if (from == beg) | |
522 | { | |
523 | immediate_quit = 0; | |
524 | return 0; | |
525 | } | |
526 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
527 | if (words_include_escapes | |
528 | && (code == Sescape || code == Scharquote)) | |
529 | break; | |
530 | if (code == Sword) | |
531 | break; | |
532 | from--; | |
533 | } | |
534 | while (1) | |
535 | { | |
536 | if (from == beg) break; | |
537 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
538 | if (!(words_include_escapes | |
539 | && (code == Sescape || code == Scharquote))) | |
540 | if (code != Sword) | |
541 | break; | |
542 | from--; | |
543 | } | |
544 | count++; | |
545 | } | |
546 | ||
547 | immediate_quit = 0; | |
548 | ||
549 | return from; | |
550 | } | |
551 | ||
552 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", | |
553 | "Move point forward ARG words (backward if ARG is negative).\n\ | |
554 | Normally returns t.\n\ | |
555 | If an edge of the buffer is reached, point is left there\n\ | |
556 | and nil is returned.") | |
557 | (count) | |
558 | Lisp_Object count; | |
559 | { | |
560 | int val; | |
561 | CHECK_NUMBER (count, 0); | |
562 | ||
563 | if (!(val = scan_words (point, XINT (count)))) | |
564 | { | |
565 | SET_PT (XINT (count) > 0 ? ZV : BEGV); | |
566 | return Qnil; | |
567 | } | |
568 | SET_PT (val); | |
569 | return Qt; | |
570 | } | |
571 | \f | |
b3cfe0c8 RS |
572 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
573 | "Move forward across up to N comments. If N is negative, move backward.\n\ | |
b3cfe0c8 | 574 | Stop scanning if we find something other than a comment or whitespace.\n\ |
c81a3712 | 575 | Set point to where scanning stops.\n\ |
b3cfe0c8 RS |
576 | If N comments are found as expected, with nothing except whitespace\n\ |
577 | between them, return t; otherwise return nil.") | |
578 | (count) | |
840f481c | 579 | Lisp_Object count; |
b3cfe0c8 RS |
580 | { |
581 | register int from; | |
582 | register int stop; | |
583 | register int c; | |
584 | register enum syntaxcode code; | |
585 | int comstyle = 0; /* style of comment encountered */ | |
be720845 | 586 | int found; |
840f481c RS |
587 | int count1; |
588 | ||
589 | CHECK_NUMBER (count, 0); | |
590 | count1 = XINT (count); | |
b3cfe0c8 RS |
591 | |
592 | immediate_quit = 1; | |
593 | QUIT; | |
594 | ||
595 | from = PT; | |
596 | ||
840f481c | 597 | while (count1 > 0) |
b3cfe0c8 RS |
598 | { |
599 | stop = ZV; | |
600 | while (from < stop) | |
601 | { | |
602 | c = FETCH_CHAR (from); | |
603 | code = SYNTAX (c); | |
604 | from++; | |
605 | comstyle = 0; | |
606 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
607 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
608 | { | |
7fc8191e RS |
609 | /* We have encountered a comment start sequence and we |
610 | are ignoring all text inside comments. We must record | |
b3cfe0c8 RS |
611 | the comment style this sequence begins so that later, |
612 | only a comment end of the same style actually ends | |
7fc8191e | 613 | the comment section. */ |
b3cfe0c8 RS |
614 | code = Scomment; |
615 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
616 | from++; | |
617 | } | |
618 | ||
619 | if (code == Scomment) | |
620 | { | |
621 | while (1) | |
622 | { | |
623 | if (from == stop) | |
624 | { | |
625 | immediate_quit = 0; | |
c81a3712 | 626 | SET_PT (from); |
b3cfe0c8 RS |
627 | return Qnil; |
628 | } | |
629 | c = FETCH_CHAR (from); | |
630 | if (SYNTAX (c) == Sendcomment | |
631 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
632 | /* we have encountered a comment end of the same style | |
633 | as the comment sequence which began this comment | |
634 | section */ | |
635 | break; | |
636 | from++; | |
637 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
638 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) | |
639 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
640 | /* we have encountered a comment end of the same style | |
641 | as the comment sequence which began this comment | |
642 | section */ | |
643 | { from++; break; } | |
644 | } | |
645 | /* We have skipped one comment. */ | |
646 | break; | |
647 | } | |
c81a3712 | 648 | else if (code != Swhitespace && code != Sendcomment) |
b3cfe0c8 RS |
649 | { |
650 | immediate_quit = 0; | |
c81a3712 | 651 | SET_PT (from - 1); |
b3cfe0c8 RS |
652 | return Qnil; |
653 | } | |
654 | } | |
655 | ||
656 | /* End of comment reached */ | |
840f481c | 657 | count1--; |
b3cfe0c8 RS |
658 | } |
659 | ||
840f481c | 660 | while (count1 < 0) |
b3cfe0c8 RS |
661 | { |
662 | stop = BEGV; | |
663 | while (from > stop) | |
664 | { | |
665 | int quoted; | |
666 | ||
667 | from--; | |
668 | quoted = char_quoted (from); | |
669 | if (quoted) | |
670 | from--; | |
671 | c = FETCH_CHAR (from); | |
672 | code = SYNTAX (c); | |
673 | comstyle = 0; | |
7fc8191e RS |
674 | if (code == Sendcomment) |
675 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
b3cfe0c8 RS |
676 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
677 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
678 | && !char_quoted (from - 1)) | |
679 | { | |
7fc8191e | 680 | /* We must record the comment style encountered so that |
b3cfe0c8 | 681 | later, we can match only the proper comment begin |
7fc8191e | 682 | sequence of the same style. */ |
b3cfe0c8 RS |
683 | code = Sendcomment; |
684 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
685 | from--; | |
686 | } | |
687 | ||
688 | if (code == Sendcomment && !quoted) | |
689 | { | |
8f9dc2ed | 690 | #if 0 |
b3cfe0c8 RS |
691 | if (code != SYNTAX (c)) |
692 | /* For a two-char comment ender, we can assume | |
693 | it does end a comment. So scan back in a simple way. */ | |
694 | { | |
695 | if (from != stop) from--; | |
696 | while (1) | |
697 | { | |
698 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
699 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
700 | break; | |
701 | if (from == stop) | |
702 | { | |
703 | immediate_quit = 0; | |
c81a3712 | 704 | SET_PT (from); |
b3cfe0c8 RS |
705 | return Qnil; |
706 | } | |
707 | from--; | |
708 | if (SYNTAX_COMSTART_SECOND (c) | |
709 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
710 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
711 | && !char_quoted (from)) | |
712 | break; | |
713 | } | |
714 | break; | |
715 | } | |
8f9dc2ed | 716 | #endif /* 0 */ |
b3cfe0c8 RS |
717 | |
718 | /* Look back, counting the parity of string-quotes, | |
719 | and recording the comment-starters seen. | |
720 | When we reach a safe place, assume that's not in a string; | |
721 | then step the main scan to the earliest comment-starter seen | |
722 | an even number of string quotes away from the safe place. | |
723 | ||
724 | OFROM[I] is position of the earliest comment-starter seen | |
725 | which is I+2X quotes from the comment-end. | |
726 | PARITY is current parity of quotes from the comment end. */ | |
727 | { | |
728 | int parity = 0; | |
729 | char my_stringend = 0; | |
730 | int string_lossage = 0; | |
731 | int comment_end = from; | |
732 | int comstart_pos = 0; | |
733 | int comstart_parity = 0; | |
734 | ||
735 | /* At beginning of range to scan, we're outside of strings; | |
736 | that determines quote parity to the comment-end. */ | |
737 | while (from != stop) | |
738 | { | |
739 | /* Move back and examine a character. */ | |
740 | from--; | |
741 | ||
742 | c = FETCH_CHAR (from); | |
743 | code = SYNTAX (c); | |
744 | ||
745 | /* If this char is the second of a 2-char comment sequence, | |
746 | back up and give the pair the appropriate syntax. */ | |
747 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
748 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
749 | { | |
750 | code = Sendcomment; | |
751 | from--; | |
752 | } | |
753 | ||
754 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) | |
755 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
756 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
757 | { | |
758 | code = Scomment; | |
759 | from--; | |
760 | } | |
761 | ||
762 | /* Ignore escaped characters. */ | |
763 | if (char_quoted (from)) | |
764 | continue; | |
765 | ||
766 | /* Track parity of quotes. */ | |
767 | if (code == Sstring) | |
768 | { | |
769 | parity ^= 1; | |
770 | if (my_stringend == 0) | |
771 | my_stringend = c; | |
772 | /* If we have two kinds of string delimiters. | |
773 | There's no way to grok this scanning backwards. */ | |
774 | else if (my_stringend != c) | |
775 | string_lossage = 1; | |
776 | } | |
777 | ||
778 | /* Record comment-starters according to that | |
779 | quote-parity to the comment-end. */ | |
780 | if (code == Scomment) | |
781 | { | |
782 | comstart_parity = parity; | |
783 | comstart_pos = from; | |
784 | } | |
785 | ||
786 | /* If we find another earlier comment-ender, | |
eb8c3be9 | 787 | any comment-starts earlier than that don't count |
b3cfe0c8 RS |
788 | (because they go with the earlier comment-ender). */ |
789 | if (code == Sendcomment | |
790 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
791 | break; | |
792 | ||
793 | /* Assume a defun-start point is outside of strings. */ | |
794 | if (code == Sopen | |
795 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
796 | break; | |
797 | } | |
798 | ||
799 | if (comstart_pos == 0) | |
800 | from = comment_end; | |
801 | /* If the earliest comment starter | |
802 | is followed by uniform paired string quotes or none, | |
803 | we know it can't be inside a string | |
804 | since if it were then the comment ender would be inside one. | |
805 | So it does start a comment. Skip back to it. */ | |
806 | else if (comstart_parity == 0 && !string_lossage) | |
807 | from = comstart_pos; | |
808 | else | |
809 | { | |
810 | /* We had two kinds of string delimiters mixed up | |
811 | together. Decode this going forwards. | |
812 | Scan fwd from the previous comment ender | |
813 | to the one in question; this records where we | |
814 | last passed a comment starter. */ | |
815 | struct lisp_parse_state state; | |
816 | scan_sexps_forward (&state, find_defun_start (comment_end), | |
340f92b5 | 817 | comment_end - 1, -10000, 0, Qnil, 0); |
b3cfe0c8 RS |
818 | if (state.incomment) |
819 | from = state.comstart; | |
820 | else | |
821 | /* We can't grok this as a comment; scan it normally. */ | |
822 | from = comment_end; | |
823 | } | |
824 | } | |
7fc8191e RS |
825 | /* We have skipped one comment. */ |
826 | break; | |
b3cfe0c8 | 827 | } |
c81a3712 | 828 | else if ((code != Swhitespace && code != Scomment) || quoted) |
b3cfe0c8 RS |
829 | { |
830 | immediate_quit = 0; | |
c81a3712 | 831 | SET_PT (from + 1); |
b3cfe0c8 RS |
832 | return Qnil; |
833 | } | |
834 | } | |
835 | ||
840f481c | 836 | count1++; |
b3cfe0c8 RS |
837 | } |
838 | ||
839 | SET_PT (from); | |
840 | immediate_quit = 0; | |
841 | return Qt; | |
842 | } | |
843 | \f | |
8489eb67 RS |
844 | int parse_sexp_ignore_comments; |
845 | ||
846 | Lisp_Object | |
847 | scan_lists (from, count, depth, sexpflag) | |
848 | register int from; | |
849 | int count, depth, sexpflag; | |
850 | { | |
851 | Lisp_Object val; | |
852 | register int stop; | |
853 | register int c; | |
854 | char stringterm; | |
855 | int quoted; | |
856 | int mathexit = 0; | |
857 | register enum syntaxcode code; | |
858 | int min_depth = depth; /* Err out if depth gets less than this. */ | |
e5d4f4dc | 859 | int comstyle = 0; /* style of comment encountered */ |
8489eb67 RS |
860 | |
861 | if (depth > 0) min_depth = 0; | |
862 | ||
863 | immediate_quit = 1; | |
864 | QUIT; | |
865 | ||
866 | while (count > 0) | |
867 | { | |
868 | stop = ZV; | |
869 | while (from < stop) | |
870 | { | |
871 | c = FETCH_CHAR (from); | |
e5d4f4dc | 872 | code = SYNTAX (c); |
8489eb67 RS |
873 | from++; |
874 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
875 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from)) | |
876 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
877 | { |
878 | /* we have encountered a comment start sequence and we | |
879 | are ignoring all text inside comments. we must record | |
880 | the comment style this sequence begins so that later, | |
881 | only a comment end of the same style actually ends | |
882 | the comment section */ | |
883 | code = Scomment; | |
884 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
885 | from++; | |
886 | } | |
887 | ||
8489eb67 RS |
888 | if (SYNTAX_PREFIX (c)) |
889 | continue; | |
890 | ||
891 | #ifdef SWITCH_ENUM_BUG | |
892 | switch ((int) code) | |
893 | #else | |
894 | switch (code) | |
895 | #endif | |
896 | { | |
897 | case Sescape: | |
898 | case Scharquote: | |
899 | if (from == stop) goto lose; | |
900 | from++; | |
901 | /* treat following character as a word constituent */ | |
902 | case Sword: | |
903 | case Ssymbol: | |
904 | if (depth || !sexpflag) break; | |
905 | /* This word counts as a sexp; return at end of it. */ | |
906 | while (from < stop) | |
907 | { | |
908 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 909 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 910 | #else |
e5d4f4dc | 911 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
912 | #endif |
913 | { | |
914 | case Scharquote: | |
915 | case Sescape: | |
916 | from++; | |
917 | if (from == stop) goto lose; | |
918 | break; | |
919 | case Sword: | |
920 | case Ssymbol: | |
921 | case Squote: | |
922 | break; | |
923 | default: | |
924 | goto done; | |
925 | } | |
926 | from++; | |
927 | } | |
928 | goto done; | |
929 | ||
930 | case Scomment: | |
931 | if (!parse_sexp_ignore_comments) break; | |
932 | while (1) | |
933 | { | |
934 | if (from == stop) goto done; | |
e5d4f4dc RS |
935 | c = FETCH_CHAR (from); |
936 | if (SYNTAX (c) == Sendcomment | |
937 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
938 | /* we have encountered a comment end of the same style | |
939 | as the comment sequence which began this comment | |
940 | section */ | |
8489eb67 RS |
941 | break; |
942 | from++; | |
943 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
e5d4f4dc RS |
944 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
945 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
946 | /* we have encountered a comment end of the same style | |
947 | as the comment sequence which began this comment | |
948 | section */ | |
8489eb67 RS |
949 | { from++; break; } |
950 | } | |
951 | break; | |
952 | ||
953 | case Smath: | |
954 | if (!sexpflag) | |
955 | break; | |
956 | if (from != stop && c == FETCH_CHAR (from)) | |
957 | from++; | |
958 | if (mathexit) | |
959 | { | |
960 | mathexit = 0; | |
961 | goto close1; | |
962 | } | |
963 | mathexit = 1; | |
964 | ||
965 | case Sopen: | |
966 | if (!++depth) goto done; | |
967 | break; | |
968 | ||
969 | case Sclose: | |
970 | close1: | |
971 | if (!--depth) goto done; | |
972 | if (depth < min_depth) | |
973 | error ("Containing expression ends prematurely"); | |
974 | break; | |
975 | ||
976 | case Sstring: | |
977 | stringterm = FETCH_CHAR (from - 1); | |
978 | while (1) | |
979 | { | |
980 | if (from >= stop) goto lose; | |
981 | if (FETCH_CHAR (from) == stringterm) break; | |
982 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 983 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 984 | #else |
e5d4f4dc | 985 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
986 | #endif |
987 | { | |
988 | case Scharquote: | |
989 | case Sescape: | |
990 | from++; | |
991 | } | |
992 | from++; | |
993 | } | |
994 | from++; | |
995 | if (!depth && sexpflag) goto done; | |
996 | break; | |
997 | } | |
998 | } | |
999 | ||
1000 | /* Reached end of buffer. Error if within object, return nil if between */ | |
1001 | if (depth) goto lose; | |
1002 | ||
1003 | immediate_quit = 0; | |
1004 | return Qnil; | |
1005 | ||
1006 | /* End of object reached */ | |
1007 | done: | |
1008 | count--; | |
1009 | } | |
1010 | ||
1011 | while (count < 0) | |
1012 | { | |
1013 | stop = BEGV; | |
1014 | while (from > stop) | |
1015 | { | |
1016 | from--; | |
1017 | if (quoted = char_quoted (from)) | |
1018 | from--; | |
1019 | c = FETCH_CHAR (from); | |
1020 | code = SYNTAX (c); | |
7fc8191e RS |
1021 | comstyle = 0; |
1022 | if (code == Sendcomment) | |
1023 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 RS |
1024 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1025 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
1026 | && !char_quoted (from - 1) | |
1027 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
1028 | { |
1029 | /* we must record the comment style encountered so that | |
1030 | later, we can match only the proper comment begin | |
1031 | sequence of the same style */ | |
1032 | code = Sendcomment; | |
1033 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
1034 | from--; | |
1035 | } | |
1036 | ||
8489eb67 RS |
1037 | if (SYNTAX_PREFIX (c)) |
1038 | continue; | |
1039 | ||
1040 | #ifdef SWITCH_ENUM_BUG | |
1041 | switch ((int) (quoted ? Sword : code)) | |
1042 | #else | |
1043 | switch (quoted ? Sword : code) | |
1044 | #endif | |
1045 | { | |
1046 | case Sword: | |
1047 | case Ssymbol: | |
1048 | if (depth || !sexpflag) break; | |
1049 | /* This word counts as a sexp; count object finished after passing it. */ | |
1050 | while (from > stop) | |
1051 | { | |
1052 | quoted = char_quoted (from - 1); | |
1053 | if (quoted) | |
1054 | from--; | |
e5d4f4dc RS |
1055 | if (! (quoted || SYNTAX (FETCH_CHAR (from - 1)) == Sword |
1056 | || SYNTAX (FETCH_CHAR (from - 1)) == Ssymbol | |
1057 | || SYNTAX (FETCH_CHAR (from - 1)) == Squote)) | |
8489eb67 RS |
1058 | goto done2; |
1059 | from--; | |
1060 | } | |
1061 | goto done2; | |
1062 | ||
1063 | case Smath: | |
1064 | if (!sexpflag) | |
1065 | break; | |
1066 | if (from != stop && c == FETCH_CHAR (from - 1)) | |
1067 | from--; | |
1068 | if (mathexit) | |
1069 | { | |
1070 | mathexit = 0; | |
1071 | goto open2; | |
1072 | } | |
1073 | mathexit = 1; | |
1074 | ||
1075 | case Sclose: | |
1076 | if (!++depth) goto done2; | |
1077 | break; | |
1078 | ||
1079 | case Sopen: | |
1080 | open2: | |
1081 | if (!--depth) goto done2; | |
1082 | if (depth < min_depth) | |
1083 | error ("Containing expression ends prematurely"); | |
1084 | break; | |
1085 | ||
1086 | case Sendcomment: | |
1087 | if (!parse_sexp_ignore_comments) | |
1088 | break; | |
8f9dc2ed | 1089 | #if 0 |
37bef230 RS |
1090 | if (code != SYNTAX (c)) |
1091 | /* For a two-char comment ender, we can assume | |
1092 | it does end a comment. So scan back in a simple way. */ | |
1093 | { | |
1094 | if (from != stop) from--; | |
1095 | while (1) | |
1096 | { | |
1097 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
1098 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
1099 | break; | |
1100 | if (from == stop) goto done; | |
1101 | from--; | |
1102 | if (SYNTAX_COMSTART_SECOND (c) | |
1103 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
1104 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
1105 | && !char_quoted (from)) | |
1106 | break; | |
1107 | } | |
1108 | break; | |
1109 | } | |
8f9dc2ed | 1110 | #endif /* 0 */ |
37bef230 | 1111 | |
8489eb67 RS |
1112 | /* Look back, counting the parity of string-quotes, |
1113 | and recording the comment-starters seen. | |
1114 | When we reach a safe place, assume that's not in a string; | |
1115 | then step the main scan to the earliest comment-starter seen | |
1116 | an even number of string quotes away from the safe place. | |
1117 | ||
1118 | OFROM[I] is position of the earliest comment-starter seen | |
1119 | which is I+2X quotes from the comment-end. | |
1120 | PARITY is current parity of quotes from the comment end. */ | |
1121 | { | |
8489eb67 | 1122 | int parity = 0; |
e5d4f4dc RS |
1123 | char my_stringend = 0; |
1124 | int string_lossage = 0; | |
1125 | int comment_end = from; | |
37bef230 RS |
1126 | int comstart_pos = 0; |
1127 | int comstart_parity = 0; | |
8489eb67 RS |
1128 | |
1129 | /* At beginning of range to scan, we're outside of strings; | |
1130 | that determines quote parity to the comment-end. */ | |
1131 | while (from != stop) | |
1132 | { | |
1133 | /* Move back and examine a character. */ | |
1134 | from--; | |
1135 | ||
1136 | c = FETCH_CHAR (from); | |
1137 | code = SYNTAX (c); | |
1138 | ||
1139 | /* If this char is the second of a 2-char comment sequence, | |
1140 | back up and give the pair the appropriate syntax. */ | |
1141 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
1142 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
e5d4f4dc RS |
1143 | { |
1144 | code = Sendcomment; | |
1145 | from--; | |
1146 | } | |
1147 | ||
8489eb67 | 1148 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) |
e5d4f4dc RS |
1149 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) |
1150 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
1151 | { | |
1152 | code = Scomment; | |
1153 | from--; | |
1154 | } | |
8489eb67 RS |
1155 | |
1156 | /* Ignore escaped characters. */ | |
1157 | if (char_quoted (from)) | |
1158 | continue; | |
1159 | ||
37bef230 | 1160 | /* Track parity of quotes. */ |
8489eb67 | 1161 | if (code == Sstring) |
e5d4f4dc RS |
1162 | { |
1163 | parity ^= 1; | |
1164 | if (my_stringend == 0) | |
1165 | my_stringend = c; | |
37bef230 | 1166 | /* If we have two kinds of string delimiters. |
e5d4f4dc RS |
1167 | There's no way to grok this scanning backwards. */ |
1168 | else if (my_stringend != c) | |
1169 | string_lossage = 1; | |
1170 | } | |
8489eb67 RS |
1171 | |
1172 | /* Record comment-starters according to that | |
1173 | quote-parity to the comment-end. */ | |
1174 | if (code == Scomment) | |
37bef230 RS |
1175 | { |
1176 | comstart_parity = parity; | |
1177 | comstart_pos = from; | |
1178 | } | |
8489eb67 | 1179 | |
37bef230 | 1180 | /* If we find another earlier comment-ender, |
eb8c3be9 | 1181 | any comment-starts earlier than that don't count |
37bef230 | 1182 | (because they go with the earlier comment-ender). */ |
e5d4f4dc RS |
1183 | if (code == Sendcomment |
1184 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
8489eb67 | 1185 | break; |
37bef230 RS |
1186 | |
1187 | /* Assume a defun-start point is outside of strings. */ | |
1188 | if (code == Sopen | |
1189 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
1190 | break; | |
8489eb67 | 1191 | } |
37bef230 RS |
1192 | |
1193 | if (comstart_pos == 0) | |
1194 | from = comment_end; | |
1195 | /* If the earliest comment starter | |
1196 | is followed by uniform paired string quotes or none, | |
1197 | we know it can't be inside a string | |
1198 | since if it were then the comment ender would be inside one. | |
1199 | So it does start a comment. Skip back to it. */ | |
1200 | else if (comstart_parity == 0 && !string_lossage) | |
1201 | from = comstart_pos; | |
1202 | else | |
e5d4f4dc RS |
1203 | { |
1204 | /* We had two kinds of string delimiters mixed up | |
1205 | together. Decode this going forwards. | |
1206 | Scan fwd from the previous comment ender | |
1207 | to the one in question; this records where we | |
1208 | last passed a comment starter. */ | |
1209 | struct lisp_parse_state state; | |
37bef230 | 1210 | scan_sexps_forward (&state, find_defun_start (comment_end), |
340f92b5 | 1211 | comment_end - 1, -10000, 0, Qnil, 0); |
e5d4f4dc RS |
1212 | if (state.incomment) |
1213 | from = state.comstart; | |
1214 | else | |
1215 | /* We can't grok this as a comment; scan it normally. */ | |
1216 | from = comment_end; | |
1217 | } | |
8489eb67 RS |
1218 | } |
1219 | break; | |
1220 | ||
1221 | case Sstring: | |
1222 | stringterm = FETCH_CHAR (from); | |
1223 | while (1) | |
1224 | { | |
1225 | if (from == stop) goto lose; | |
1226 | if (!char_quoted (from - 1) | |
1227 | && stringterm == FETCH_CHAR (from - 1)) | |
1228 | break; | |
1229 | from--; | |
1230 | } | |
1231 | from--; | |
1232 | if (!depth && sexpflag) goto done2; | |
1233 | break; | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | /* Reached start of buffer. Error if within object, return nil if between */ | |
1238 | if (depth) goto lose; | |
1239 | ||
1240 | immediate_quit = 0; | |
1241 | return Qnil; | |
1242 | ||
1243 | done2: | |
1244 | count++; | |
1245 | } | |
1246 | ||
1247 | ||
1248 | immediate_quit = 0; | |
1249 | XFASTINT (val) = from; | |
1250 | return val; | |
1251 | ||
1252 | lose: | |
1253 | error ("Unbalanced parentheses"); | |
1254 | /* NOTREACHED */ | |
1255 | } | |
1256 | ||
340f92b5 | 1257 | static int |
8489eb67 RS |
1258 | char_quoted (pos) |
1259 | register int pos; | |
1260 | { | |
1261 | register enum syntaxcode code; | |
1262 | register int beg = BEGV; | |
1263 | register int quoted = 0; | |
1264 | ||
1265 | while (pos > beg | |
1266 | && ((code = SYNTAX (FETCH_CHAR (pos - 1))) == Scharquote | |
1267 | || code == Sescape)) | |
1268 | pos--, quoted = !quoted; | |
1269 | return quoted; | |
1270 | } | |
1271 | ||
1272 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, | |
1273 | "Scan from character number FROM by COUNT lists.\n\ | |
1274 | Returns the character number of the position thus found.\n\ | |
1275 | \n\ | |
1276 | If DEPTH is nonzero, paren depth begins counting from that value,\n\ | |
1277 | only places where the depth in parentheses becomes zero\n\ | |
1278 | are candidates for stopping; COUNT such places are counted.\n\ | |
1279 | Thus, a positive value for DEPTH means go out levels.\n\ | |
1280 | \n\ | |
1281 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
1282 | \n\ | |
1283 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
1284 | and the depth is wrong, an error is signaled.\n\ | |
1285 | If the depth is right but the count is not used up, nil is returned.") | |
1286 | (from, count, depth) | |
1287 | Lisp_Object from, count, depth; | |
1288 | { | |
1289 | CHECK_NUMBER (from, 0); | |
1290 | CHECK_NUMBER (count, 1); | |
1291 | CHECK_NUMBER (depth, 2); | |
1292 | ||
1293 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
1294 | } | |
1295 | ||
1296 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
1297 | "Scan from character number FROM by COUNT balanced expressions.\n\ | |
1298 | If COUNT is negative, scan backwards.\n\ | |
1299 | Returns the character number of the position thus found.\n\ | |
1300 | \n\ | |
1301 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
1302 | \n\ | |
1303 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
1304 | in the middle of a parenthetical grouping, an error is signaled.\n\ | |
1305 | If the beginning or end is reached between groupings\n\ | |
1306 | but before count is used up, nil is returned.") | |
1307 | (from, count) | |
1308 | Lisp_Object from, count; | |
1309 | { | |
1310 | CHECK_NUMBER (from, 0); | |
1311 | CHECK_NUMBER (count, 1); | |
1312 | ||
1313 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
1314 | } | |
1315 | ||
1316 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
1317 | 0, 0, 0, | |
1318 | "Move point backward over any number of chars with prefix syntax.\n\ | |
1319 | This includes chars with \"quote\" or \"prefix\" syntax (' or p).") | |
1320 | () | |
1321 | { | |
1322 | int beg = BEGV; | |
1323 | int pos = point; | |
1324 | ||
1325 | while (pos > beg && !char_quoted (pos - 1) | |
1326 | && (SYNTAX (FETCH_CHAR (pos - 1)) == Squote | |
1327 | || SYNTAX_PREFIX (FETCH_CHAR (pos - 1)))) | |
1328 | pos--; | |
1329 | ||
1330 | SET_PT (pos); | |
1331 | ||
1332 | return Qnil; | |
1333 | } | |
1334 | \f | |
8489eb67 | 1335 | /* Parse forward from FROM to END, |
e5d4f4dc RS |
1336 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
1337 | and return a description of the state of the parse at END. | |
c81a3712 RS |
1338 | If STOPBEFORE is nonzero, stop at the start of an atom. |
1339 | If COMMENTSTOP is nonzero, stop at the start of a comment. */ | |
8489eb67 | 1340 | |
340f92b5 | 1341 | static void |
c81a3712 RS |
1342 | scan_sexps_forward (stateptr, from, end, targetdepth, |
1343 | stopbefore, oldstate, commentstop) | |
e5d4f4dc | 1344 | struct lisp_parse_state *stateptr; |
8489eb67 RS |
1345 | register int from; |
1346 | int end, targetdepth, stopbefore; | |
1347 | Lisp_Object oldstate; | |
c81a3712 | 1348 | int commentstop; |
8489eb67 RS |
1349 | { |
1350 | struct lisp_parse_state state; | |
1351 | ||
1352 | register enum syntaxcode code; | |
1353 | struct level { int last, prev; }; | |
1354 | struct level levelstart[100]; | |
1355 | register struct level *curlevel = levelstart; | |
1356 | struct level *endlevel = levelstart + 100; | |
1357 | char prev; | |
1358 | register int depth; /* Paren depth of current scanning location. | |
1359 | level - levelstart equals this except | |
1360 | when the depth becomes negative. */ | |
1361 | int mindepth; /* Lowest DEPTH value seen. */ | |
1362 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
1363 | Lisp_Object tem; | |
1364 | ||
1365 | immediate_quit = 1; | |
1366 | QUIT; | |
1367 | ||
265a9e55 | 1368 | if (NILP (oldstate)) |
8489eb67 RS |
1369 | { |
1370 | depth = 0; | |
1371 | state.instring = -1; | |
1372 | state.incomment = 0; | |
e5d4f4dc | 1373 | state.comstyle = 0; /* comment style a by default */ |
8489eb67 RS |
1374 | } |
1375 | else | |
1376 | { | |
1377 | tem = Fcar (oldstate); | |
265a9e55 | 1378 | if (!NILP (tem)) |
8489eb67 RS |
1379 | depth = XINT (tem); |
1380 | else | |
1381 | depth = 0; | |
1382 | ||
1383 | oldstate = Fcdr (oldstate); | |
1384 | oldstate = Fcdr (oldstate); | |
1385 | oldstate = Fcdr (oldstate); | |
1386 | tem = Fcar (oldstate); | |
265a9e55 | 1387 | state.instring = !NILP (tem) ? XINT (tem) : -1; |
8489eb67 RS |
1388 | |
1389 | oldstate = Fcdr (oldstate); | |
1390 | tem = Fcar (oldstate); | |
265a9e55 | 1391 | state.incomment = !NILP (tem); |
8489eb67 RS |
1392 | |
1393 | oldstate = Fcdr (oldstate); | |
1394 | tem = Fcar (oldstate); | |
265a9e55 | 1395 | start_quoted = !NILP (tem); |
e5d4f4dc RS |
1396 | |
1397 | /* if the eight element of the list is nil, we are in comment | |
1398 | style a. if it is non-nil, we are in comment style b */ | |
1399 | oldstate = Fcdr (oldstate); | |
1400 | oldstate = Fcdr (oldstate); | |
e5d4f4dc RS |
1401 | tem = Fcar (oldstate); |
1402 | state.comstyle = !NILP (tem); | |
8489eb67 RS |
1403 | } |
1404 | state.quoted = 0; | |
1405 | mindepth = depth; | |
1406 | ||
1407 | curlevel->prev = -1; | |
1408 | curlevel->last = -1; | |
1409 | ||
1410 | /* Enter the loop at a place appropriate for initial state. */ | |
1411 | ||
1412 | if (state.incomment) goto startincomment; | |
1413 | if (state.instring >= 0) | |
1414 | { | |
1415 | if (start_quoted) goto startquotedinstring; | |
1416 | goto startinstring; | |
1417 | } | |
1418 | if (start_quoted) goto startquoted; | |
1419 | ||
1420 | while (from < end) | |
1421 | { | |
e5d4f4dc | 1422 | code = SYNTAX (FETCH_CHAR (from)); |
8489eb67 | 1423 | from++; |
8f9dc2ed RS |
1424 | if (code == Scomment) |
1425 | state.comstart = from-1; | |
1426 | ||
1427 | else if (from < end && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
1428 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
e5d4f4dc RS |
1429 | { |
1430 | /* Record the comment style we have entered so that only | |
1431 | the comment-end sequence of the same style actually | |
1432 | terminates the comment section. */ | |
1433 | code = Scomment; | |
1434 | state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
8f9dc2ed | 1435 | state.comstart = from-1; |
e5d4f4dc RS |
1436 | from++; |
1437 | } | |
1438 | ||
8489eb67 RS |
1439 | if (SYNTAX_PREFIX (FETCH_CHAR (from - 1))) |
1440 | continue; | |
1441 | #ifdef SWITCH_ENUM_BUG | |
1442 | switch ((int) code) | |
1443 | #else | |
1444 | switch (code) | |
1445 | #endif | |
1446 | { | |
1447 | case Sescape: | |
1448 | case Scharquote: | |
1449 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1450 | curlevel->last = from - 1; | |
1451 | startquoted: | |
1452 | if (from == end) goto endquoted; | |
1453 | from++; | |
1454 | goto symstarted; | |
1455 | /* treat following character as a word constituent */ | |
1456 | case Sword: | |
1457 | case Ssymbol: | |
1458 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1459 | curlevel->last = from - 1; | |
1460 | symstarted: | |
1461 | while (from < end) | |
1462 | { | |
1463 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1464 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1465 | #else |
e5d4f4dc | 1466 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1467 | #endif |
1468 | { | |
1469 | case Scharquote: | |
1470 | case Sescape: | |
1471 | from++; | |
1472 | if (from == end) goto endquoted; | |
1473 | break; | |
1474 | case Sword: | |
1475 | case Ssymbol: | |
1476 | case Squote: | |
1477 | break; | |
1478 | default: | |
1479 | goto symdone; | |
1480 | } | |
1481 | from++; | |
1482 | } | |
1483 | symdone: | |
1484 | curlevel->prev = curlevel->last; | |
1485 | break; | |
1486 | ||
1487 | case Scomment: | |
1488 | state.incomment = 1; | |
1489 | startincomment: | |
c81a3712 RS |
1490 | if (commentstop) |
1491 | goto done; | |
8489eb67 RS |
1492 | while (1) |
1493 | { | |
1494 | if (from == end) goto done; | |
e5d4f4dc RS |
1495 | prev = FETCH_CHAR (from); |
1496 | if (SYNTAX (prev) == Sendcomment | |
1497 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1498 | /* Only terminate the comment section if the endcomment | |
1499 | of the same style as the start sequence has been | |
1500 | encountered. */ | |
8489eb67 RS |
1501 | break; |
1502 | from++; | |
1503 | if (from < end && SYNTAX_COMEND_FIRST (prev) | |
e5d4f4dc RS |
1504 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
1505 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1506 | /* Only terminate the comment section if the end-comment | |
1507 | sequence of the same style as the start sequence has | |
1508 | been encountered. */ | |
8489eb67 RS |
1509 | { from++; break; } |
1510 | } | |
1511 | state.incomment = 0; | |
e5d4f4dc | 1512 | state.comstyle = 0; /* reset the comment style */ |
8489eb67 RS |
1513 | break; |
1514 | ||
1515 | case Sopen: | |
1516 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1517 | depth++; | |
1518 | /* curlevel++->last ran into compiler bug on Apollo */ | |
1519 | curlevel->last = from - 1; | |
1520 | if (++curlevel == endlevel) | |
1521 | error ("Nesting too deep for parser"); | |
1522 | curlevel->prev = -1; | |
1523 | curlevel->last = -1; | |
1524 | if (!--targetdepth) goto done; | |
1525 | break; | |
1526 | ||
1527 | case Sclose: | |
1528 | depth--; | |
1529 | if (depth < mindepth) | |
1530 | mindepth = depth; | |
1531 | if (curlevel != levelstart) | |
1532 | curlevel--; | |
1533 | curlevel->prev = curlevel->last; | |
1534 | if (!++targetdepth) goto done; | |
1535 | break; | |
1536 | ||
1537 | case Sstring: | |
1538 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1539 | curlevel->last = from - 1; | |
1540 | state.instring = FETCH_CHAR (from - 1); | |
1541 | startinstring: | |
1542 | while (1) | |
1543 | { | |
1544 | if (from >= end) goto done; | |
1545 | if (FETCH_CHAR (from) == state.instring) break; | |
1546 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1547 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1548 | #else |
e5d4f4dc | 1549 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1550 | #endif |
1551 | { | |
1552 | case Scharquote: | |
1553 | case Sescape: | |
1554 | from++; | |
1555 | startquotedinstring: | |
1556 | if (from >= end) goto endquoted; | |
1557 | } | |
1558 | from++; | |
1559 | } | |
1560 | state.instring = -1; | |
1561 | curlevel->prev = curlevel->last; | |
1562 | from++; | |
1563 | break; | |
1564 | ||
1565 | case Smath: | |
1566 | break; | |
1567 | } | |
1568 | } | |
1569 | goto done; | |
1570 | ||
1571 | stop: /* Here if stopping before start of sexp. */ | |
1572 | from--; /* We have just fetched the char that starts it; */ | |
1573 | goto done; /* but return the position before it. */ | |
1574 | ||
1575 | endquoted: | |
1576 | state.quoted = 1; | |
1577 | done: | |
1578 | state.depth = depth; | |
1579 | state.mindepth = mindepth; | |
1580 | state.thislevelstart = curlevel->prev; | |
1581 | state.prevlevelstart | |
1582 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
1583 | state.location = from; | |
1584 | immediate_quit = 0; | |
1585 | ||
e5d4f4dc | 1586 | *stateptr = state; |
8489eb67 RS |
1587 | } |
1588 | ||
1589 | /* This comment supplies the doc string for parse-partial-sexp, | |
1590 | for make-docfile to see. We cannot put this in the real DEFUN | |
1591 | due to limits in the Unix cpp. | |
1592 | ||
c81a3712 | 1593 | DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0, |
8489eb67 RS |
1594 | "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\ |
1595 | Parsing stops at TO or when certain criteria are met;\n\ | |
1596 | point is set to where parsing stops.\n\ | |
1597 | If fifth arg STATE is omitted or nil,\n\ | |
1598 | parsing assumes that FROM is the beginning of a function.\n\ | |
e5d4f4dc | 1599 | Value is a list of eight elements describing final state of parsing:\n\ |
af50f9e5 RS |
1600 | 0. depth in parens.\n\ |
1601 | 1. character address of start of innermost containing list; nil if none.\n\ | |
1602 | 2. character address of start of last complete sexp terminated.\n\ | |
1603 | 3. non-nil if inside a string.\n\ | |
8489eb67 | 1604 | (it is the character that will terminate the string.)\n\ |
af50f9e5 RS |
1605 | 4. t if inside a comment.\n\ |
1606 | 5. t if following a quote character.\n\ | |
1607 | 6. the minimum paren-depth encountered during this scan.\n\ | |
1608 | 7. t if in a comment of style `b'.\n\ | |
8489eb67 RS |
1609 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\ |
1610 | in parentheses becomes equal to TARGETDEPTH.\n\ | |
1611 | Fourth arg STOPBEFORE non-nil means stop when come to\n\ | |
1612 | any character that starts a sexp.\n\ | |
ec11639d | 1613 | Fifth arg STATE is an eight-list like what this function returns.\n\ |
a4275ad1 | 1614 | It is used to initialize the state of the parse. Its second and third |
c81a3712 RS |
1615 | elements are ignored. |
1616 | Sixth args COMMENTSTOP non-nil means stop at the start of a comment.") | |
1617 | (from, to, targetdepth, stopbefore, state, commentstop) | |
8489eb67 RS |
1618 | */ |
1619 | ||
c81a3712 | 1620 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
8489eb67 | 1621 | 0 /* See immediately above */) |
c81a3712 RS |
1622 | (from, to, targetdepth, stopbefore, oldstate, commentstop) |
1623 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; | |
8489eb67 RS |
1624 | { |
1625 | struct lisp_parse_state state; | |
1626 | int target; | |
1627 | ||
265a9e55 | 1628 | if (!NILP (targetdepth)) |
8489eb67 RS |
1629 | { |
1630 | CHECK_NUMBER (targetdepth, 3); | |
1631 | target = XINT (targetdepth); | |
1632 | } | |
1633 | else | |
1634 | target = -100000; /* We won't reach this depth */ | |
1635 | ||
1636 | validate_region (&from, &to); | |
e5d4f4dc | 1637 | scan_sexps_forward (&state, XINT (from), XINT (to), |
c81a3712 RS |
1638 | target, !NILP (stopbefore), oldstate, |
1639 | !NILP (commentstop)); | |
8489eb67 RS |
1640 | |
1641 | SET_PT (state.location); | |
1642 | ||
1643 | return Fcons (make_number (state.depth), | |
1644 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
1645 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
1646 | Fcons (state.instring >= 0 ? make_number (state.instring) : Qnil, | |
1647 | Fcons (state.incomment ? Qt : Qnil, | |
1648 | Fcons (state.quoted ? Qt : Qnil, | |
e5d4f4dc RS |
1649 | Fcons (make_number (state.mindepth), |
1650 | Fcons (state.comstyle ? Qt : Qnil, | |
1651 | Qnil)))))))); | |
8489eb67 RS |
1652 | } |
1653 | \f | |
1654 | init_syntax_once () | |
1655 | { | |
1656 | register int i; | |
1657 | register struct Lisp_Vector *v; | |
1658 | ||
1659 | /* Set this now, so first buffer creation can refer to it. */ | |
1660 | /* Make it nil before calling copy-syntax-table | |
1661 | so that copy-syntax-table will know not to try to copy from garbage */ | |
1662 | Vstandard_syntax_table = Qnil; | |
1663 | Vstandard_syntax_table = Fcopy_syntax_table (Qnil); | |
1664 | ||
1665 | v = XVECTOR (Vstandard_syntax_table); | |
1666 | ||
1667 | for (i = 'a'; i <= 'z'; i++) | |
1668 | XFASTINT (v->contents[i]) = (int) Sword; | |
1669 | for (i = 'A'; i <= 'Z'; i++) | |
1670 | XFASTINT (v->contents[i]) = (int) Sword; | |
1671 | for (i = '0'; i <= '9'; i++) | |
1672 | XFASTINT (v->contents[i]) = (int) Sword; | |
1673 | XFASTINT (v->contents['$']) = (int) Sword; | |
1674 | XFASTINT (v->contents['%']) = (int) Sword; | |
1675 | ||
1676 | XFASTINT (v->contents['(']) = (int) Sopen + (')' << 8); | |
1677 | XFASTINT (v->contents[')']) = (int) Sclose + ('(' << 8); | |
1678 | XFASTINT (v->contents['[']) = (int) Sopen + (']' << 8); | |
1679 | XFASTINT (v->contents[']']) = (int) Sclose + ('[' << 8); | |
1680 | XFASTINT (v->contents['{']) = (int) Sopen + ('}' << 8); | |
1681 | XFASTINT (v->contents['}']) = (int) Sclose + ('{' << 8); | |
1682 | XFASTINT (v->contents['"']) = (int) Sstring; | |
1683 | XFASTINT (v->contents['\\']) = (int) Sescape; | |
1684 | ||
1685 | for (i = 0; i < 10; i++) | |
1686 | XFASTINT (v->contents["_-+*/&|<>="[i]]) = (int) Ssymbol; | |
1687 | ||
1688 | for (i = 0; i < 12; i++) | |
1689 | XFASTINT (v->contents[".,;:?!#@~^'`"[i]]) = (int) Spunct; | |
1690 | } | |
1691 | ||
1692 | syms_of_syntax () | |
1693 | { | |
1694 | Qsyntax_table_p = intern ("syntax-table-p"); | |
1695 | staticpro (&Qsyntax_table_p); | |
1696 | ||
1697 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, | |
1698 | "Non-nil means `forward-sexp', etc., should treat comments as whitespace."); | |
1699 | ||
1700 | words_include_escapes = 0; | |
1701 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
1702 | "Non-nil means `forward-word', etc., should treat escape chars part of words."); | |
1703 | ||
1704 | defsubr (&Ssyntax_table_p); | |
1705 | defsubr (&Ssyntax_table); | |
1706 | defsubr (&Sstandard_syntax_table); | |
1707 | defsubr (&Scopy_syntax_table); | |
1708 | defsubr (&Sset_syntax_table); | |
1709 | defsubr (&Schar_syntax); | |
1710 | defsubr (&Smodify_syntax_entry); | |
1711 | defsubr (&Sdescribe_syntax); | |
1712 | ||
1713 | defsubr (&Sforward_word); | |
1714 | ||
b3cfe0c8 | 1715 | defsubr (&Sforward_comment); |
8489eb67 RS |
1716 | defsubr (&Sscan_lists); |
1717 | defsubr (&Sscan_sexps); | |
1718 | defsubr (&Sbackward_prefix_chars); | |
1719 | defsubr (&Sparse_partial_sexp); | |
1720 | } |