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8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
3a22ee35 | 2 | Copyright (C) 1985, 1987, 1993, 1994 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. */ | |
45eb8d9d | 87 | tem = scan_buffer ('\n', pos, -1, &shortage, 1); |
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. */ | |
45eb8d9d | 95 | tem = scan_buffer ('\n', tem, -2, &shortage, 1); |
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, | |
6cb71bf6 | 200 | (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ |
8489eb67 RS |
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 | ||
6cb71bf6 | 212 | char syntax_code_spec[14] = |
8489eb67 | 213 | { |
6cb71bf6 | 214 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@' |
8489eb67 RS |
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\ |
6cb71bf6 | 244 | / character-quote. @ inherit from `standard-syntax-table'.\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; | |
6cb71bf6 RS |
423 | case Sinherit: |
424 | insert_string ("inherit"); break; | |
8489eb67 RS |
425 | default: |
426 | insert_string ("invalid"); | |
427 | return; | |
428 | } | |
429 | ||
430 | if (match) | |
431 | { | |
432 | insert_string (", matches "); | |
410e16ff | 433 | insert_char (match); |
8489eb67 RS |
434 | } |
435 | ||
436 | if (start1) | |
437 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
438 | if (start2) | |
439 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
440 | ||
441 | if (end1) | |
442 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
443 | if (end2) | |
444 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
445 | if (comstyle) |
446 | insert_string (" (comment style b)"); | |
447 | ||
8489eb67 RS |
448 | if (prefix) |
449 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
450 | ||
451 | insert_string ("\n"); | |
452 | } | |
453 | ||
340f92b5 | 454 | static Lisp_Object |
8489eb67 RS |
455 | describe_syntax_1 (vector) |
456 | Lisp_Object vector; | |
457 | { | |
458 | struct buffer *old = current_buffer; | |
459 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
b3cfe0c8 | 460 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil); |
8489eb67 RS |
461 | set_buffer_internal (old); |
462 | return Qnil; | |
463 | } | |
464 | ||
465 | DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "", | |
466 | "Describe the syntax specifications in the syntax table.\n\ | |
467 | The descriptions are inserted in a buffer, which is then displayed.") | |
468 | () | |
469 | { | |
470 | internal_with_output_to_temp_buffer | |
471 | ("*Help*", describe_syntax_1, current_buffer->syntax_table); | |
472 | ||
473 | return Qnil; | |
474 | } | |
475 | \f | |
476 | /* Return the position across COUNT words from FROM. | |
477 | If that many words cannot be found before the end of the buffer, return 0. | |
478 | COUNT negative means scan backward and stop at word beginning. */ | |
479 | ||
480 | scan_words (from, count) | |
481 | register int from, count; | |
482 | { | |
483 | register int beg = BEGV; | |
484 | register int end = ZV; | |
485 | register int code; | |
486 | ||
487 | immediate_quit = 1; | |
488 | QUIT; | |
489 | ||
490 | while (count > 0) | |
491 | { | |
492 | while (1) | |
493 | { | |
494 | if (from == end) | |
495 | { | |
496 | immediate_quit = 0; | |
497 | return 0; | |
498 | } | |
499 | code = SYNTAX (FETCH_CHAR (from)); | |
500 | if (words_include_escapes | |
501 | && (code == Sescape || code == Scharquote)) | |
502 | break; | |
503 | if (code == Sword) | |
504 | break; | |
505 | from++; | |
506 | } | |
507 | while (1) | |
508 | { | |
509 | if (from == end) break; | |
510 | code = SYNTAX (FETCH_CHAR (from)); | |
511 | if (!(words_include_escapes | |
512 | && (code == Sescape || code == Scharquote))) | |
513 | if (code != Sword) | |
514 | break; | |
515 | from++; | |
516 | } | |
517 | count--; | |
518 | } | |
519 | while (count < 0) | |
520 | { | |
521 | while (1) | |
522 | { | |
523 | if (from == beg) | |
524 | { | |
525 | immediate_quit = 0; | |
526 | return 0; | |
527 | } | |
528 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
529 | if (words_include_escapes | |
530 | && (code == Sescape || code == Scharquote)) | |
531 | break; | |
532 | if (code == Sword) | |
533 | break; | |
534 | from--; | |
535 | } | |
536 | while (1) | |
537 | { | |
538 | if (from == beg) break; | |
539 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
540 | if (!(words_include_escapes | |
541 | && (code == Sescape || code == Scharquote))) | |
542 | if (code != Sword) | |
543 | break; | |
544 | from--; | |
545 | } | |
546 | count++; | |
547 | } | |
548 | ||
549 | immediate_quit = 0; | |
550 | ||
551 | return from; | |
552 | } | |
553 | ||
554 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", | |
555 | "Move point forward ARG words (backward if ARG is negative).\n\ | |
556 | Normally returns t.\n\ | |
557 | If an edge of the buffer is reached, point is left there\n\ | |
558 | and nil is returned.") | |
559 | (count) | |
560 | Lisp_Object count; | |
561 | { | |
562 | int val; | |
563 | CHECK_NUMBER (count, 0); | |
564 | ||
565 | if (!(val = scan_words (point, XINT (count)))) | |
566 | { | |
567 | SET_PT (XINT (count) > 0 ? ZV : BEGV); | |
568 | return Qnil; | |
569 | } | |
570 | SET_PT (val); | |
571 | return Qt; | |
572 | } | |
573 | \f | |
b3cfe0c8 RS |
574 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
575 | "Move forward across up to N comments. If N is negative, move backward.\n\ | |
b3cfe0c8 | 576 | Stop scanning if we find something other than a comment or whitespace.\n\ |
c81a3712 | 577 | Set point to where scanning stops.\n\ |
b3cfe0c8 RS |
578 | If N comments are found as expected, with nothing except whitespace\n\ |
579 | between them, return t; otherwise return nil.") | |
580 | (count) | |
840f481c | 581 | Lisp_Object count; |
b3cfe0c8 RS |
582 | { |
583 | register int from; | |
584 | register int stop; | |
585 | register int c; | |
586 | register enum syntaxcode code; | |
587 | int comstyle = 0; /* style of comment encountered */ | |
be720845 | 588 | int found; |
840f481c RS |
589 | int count1; |
590 | ||
591 | CHECK_NUMBER (count, 0); | |
592 | count1 = XINT (count); | |
b3cfe0c8 RS |
593 | |
594 | immediate_quit = 1; | |
595 | QUIT; | |
596 | ||
597 | from = PT; | |
598 | ||
840f481c | 599 | while (count1 > 0) |
b3cfe0c8 RS |
600 | { |
601 | stop = ZV; | |
04882296 | 602 | do |
b3cfe0c8 | 603 | { |
04882296 KH |
604 | if (from == stop) |
605 | { | |
606 | SET_PT (from); | |
607 | return Qnil; | |
608 | } | |
b3cfe0c8 RS |
609 | c = FETCH_CHAR (from); |
610 | code = SYNTAX (c); | |
611 | from++; | |
612 | comstyle = 0; | |
613 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
614 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
615 | { | |
7fc8191e RS |
616 | /* We have encountered a comment start sequence and we |
617 | are ignoring all text inside comments. We must record | |
b3cfe0c8 RS |
618 | the comment style this sequence begins so that later, |
619 | only a comment end of the same style actually ends | |
7fc8191e | 620 | the comment section. */ |
b3cfe0c8 RS |
621 | code = Scomment; |
622 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
623 | from++; | |
624 | } | |
04882296 KH |
625 | } |
626 | while (code == Swhitespace || code == Sendcomment); | |
627 | if (code != Scomment) | |
628 | { | |
629 | immediate_quit = 0; | |
630 | SET_PT (from - 1); | |
631 | return Qnil; | |
632 | } | |
633 | /* We're at the start of a comment. */ | |
634 | while (1) | |
635 | { | |
636 | if (from == stop) | |
b3cfe0c8 RS |
637 | { |
638 | immediate_quit = 0; | |
04882296 | 639 | SET_PT (from); |
b3cfe0c8 RS |
640 | return Qnil; |
641 | } | |
04882296 KH |
642 | c = FETCH_CHAR (from); |
643 | if (SYNTAX (c) == Sendcomment | |
644 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
645 | /* we have encountered a comment end of the same style | |
646 | as the comment sequence which began this comment | |
647 | section */ | |
648 | break; | |
649 | from++; | |
650 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
651 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) | |
652 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
653 | /* we have encountered a comment end of the same style | |
654 | as the comment sequence which began this comment | |
655 | section */ | |
656 | { from++; break; } | |
b3cfe0c8 | 657 | } |
04882296 | 658 | /* We have skipped one comment. */ |
840f481c | 659 | count1--; |
b3cfe0c8 RS |
660 | } |
661 | ||
840f481c | 662 | while (count1 < 0) |
b3cfe0c8 RS |
663 | { |
664 | stop = BEGV; | |
665 | while (from > stop) | |
666 | { | |
667 | int quoted; | |
668 | ||
669 | from--; | |
670 | quoted = char_quoted (from); | |
671 | if (quoted) | |
672 | from--; | |
673 | c = FETCH_CHAR (from); | |
674 | code = SYNTAX (c); | |
675 | comstyle = 0; | |
7fc8191e RS |
676 | if (code == Sendcomment) |
677 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
b3cfe0c8 RS |
678 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
679 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
680 | && !char_quoted (from - 1)) | |
681 | { | |
7fc8191e | 682 | /* We must record the comment style encountered so that |
b3cfe0c8 | 683 | later, we can match only the proper comment begin |
7fc8191e | 684 | sequence of the same style. */ |
b3cfe0c8 RS |
685 | code = Sendcomment; |
686 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
687 | from--; | |
688 | } | |
689 | ||
690 | if (code == Sendcomment && !quoted) | |
691 | { | |
8f9dc2ed | 692 | #if 0 |
b3cfe0c8 RS |
693 | if (code != SYNTAX (c)) |
694 | /* For a two-char comment ender, we can assume | |
695 | it does end a comment. So scan back in a simple way. */ | |
696 | { | |
697 | if (from != stop) from--; | |
698 | while (1) | |
699 | { | |
700 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
701 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
702 | break; | |
703 | if (from == stop) | |
704 | { | |
705 | immediate_quit = 0; | |
c81a3712 | 706 | SET_PT (from); |
b3cfe0c8 RS |
707 | return Qnil; |
708 | } | |
709 | from--; | |
710 | if (SYNTAX_COMSTART_SECOND (c) | |
711 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
712 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
713 | && !char_quoted (from)) | |
714 | break; | |
715 | } | |
716 | break; | |
717 | } | |
8f9dc2ed | 718 | #endif /* 0 */ |
b3cfe0c8 RS |
719 | |
720 | /* Look back, counting the parity of string-quotes, | |
721 | and recording the comment-starters seen. | |
722 | When we reach a safe place, assume that's not in a string; | |
723 | then step the main scan to the earliest comment-starter seen | |
724 | an even number of string quotes away from the safe place. | |
725 | ||
726 | OFROM[I] is position of the earliest comment-starter seen | |
727 | which is I+2X quotes from the comment-end. | |
728 | PARITY is current parity of quotes from the comment end. */ | |
729 | { | |
730 | int parity = 0; | |
731 | char my_stringend = 0; | |
732 | int string_lossage = 0; | |
733 | int comment_end = from; | |
734 | int comstart_pos = 0; | |
735 | int comstart_parity = 0; | |
736 | ||
737 | /* At beginning of range to scan, we're outside of strings; | |
738 | that determines quote parity to the comment-end. */ | |
739 | while (from != stop) | |
740 | { | |
741 | /* Move back and examine a character. */ | |
742 | from--; | |
743 | ||
744 | c = FETCH_CHAR (from); | |
745 | code = SYNTAX (c); | |
746 | ||
747 | /* If this char is the second of a 2-char comment sequence, | |
748 | back up and give the pair the appropriate syntax. */ | |
749 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
750 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
751 | { | |
752 | code = Sendcomment; | |
753 | from--; | |
754 | } | |
755 | ||
756 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) | |
757 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
758 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
759 | { | |
760 | code = Scomment; | |
761 | from--; | |
762 | } | |
763 | ||
764 | /* Ignore escaped characters. */ | |
765 | if (char_quoted (from)) | |
766 | continue; | |
767 | ||
768 | /* Track parity of quotes. */ | |
769 | if (code == Sstring) | |
770 | { | |
771 | parity ^= 1; | |
772 | if (my_stringend == 0) | |
773 | my_stringend = c; | |
774 | /* If we have two kinds of string delimiters. | |
775 | There's no way to grok this scanning backwards. */ | |
776 | else if (my_stringend != c) | |
777 | string_lossage = 1; | |
778 | } | |
779 | ||
780 | /* Record comment-starters according to that | |
781 | quote-parity to the comment-end. */ | |
782 | if (code == Scomment) | |
783 | { | |
784 | comstart_parity = parity; | |
785 | comstart_pos = from; | |
786 | } | |
787 | ||
788 | /* If we find another earlier comment-ender, | |
eb8c3be9 | 789 | any comment-starts earlier than that don't count |
b3cfe0c8 RS |
790 | (because they go with the earlier comment-ender). */ |
791 | if (code == Sendcomment | |
792 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
793 | break; | |
794 | ||
795 | /* Assume a defun-start point is outside of strings. */ | |
796 | if (code == Sopen | |
797 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
798 | break; | |
799 | } | |
800 | ||
801 | if (comstart_pos == 0) | |
802 | from = comment_end; | |
803 | /* If the earliest comment starter | |
804 | is followed by uniform paired string quotes or none, | |
805 | we know it can't be inside a string | |
806 | since if it were then the comment ender would be inside one. | |
807 | So it does start a comment. Skip back to it. */ | |
808 | else if (comstart_parity == 0 && !string_lossage) | |
809 | from = comstart_pos; | |
810 | else | |
811 | { | |
812 | /* We had two kinds of string delimiters mixed up | |
813 | together. Decode this going forwards. | |
814 | Scan fwd from the previous comment ender | |
815 | to the one in question; this records where we | |
816 | last passed a comment starter. */ | |
817 | struct lisp_parse_state state; | |
818 | scan_sexps_forward (&state, find_defun_start (comment_end), | |
340f92b5 | 819 | comment_end - 1, -10000, 0, Qnil, 0); |
b3cfe0c8 RS |
820 | if (state.incomment) |
821 | from = state.comstart; | |
822 | else | |
823 | /* We can't grok this as a comment; scan it normally. */ | |
824 | from = comment_end; | |
825 | } | |
826 | } | |
7fc8191e RS |
827 | /* We have skipped one comment. */ |
828 | break; | |
b3cfe0c8 | 829 | } |
c81a3712 | 830 | else if ((code != Swhitespace && code != Scomment) || quoted) |
b3cfe0c8 RS |
831 | { |
832 | immediate_quit = 0; | |
c81a3712 | 833 | SET_PT (from + 1); |
b3cfe0c8 RS |
834 | return Qnil; |
835 | } | |
836 | } | |
837 | ||
840f481c | 838 | count1++; |
b3cfe0c8 RS |
839 | } |
840 | ||
841 | SET_PT (from); | |
842 | immediate_quit = 0; | |
843 | return Qt; | |
844 | } | |
845 | \f | |
8489eb67 RS |
846 | int parse_sexp_ignore_comments; |
847 | ||
848 | Lisp_Object | |
849 | scan_lists (from, count, depth, sexpflag) | |
850 | register int from; | |
851 | int count, depth, sexpflag; | |
852 | { | |
853 | Lisp_Object val; | |
854 | register int stop; | |
855 | register int c; | |
856 | char stringterm; | |
857 | int quoted; | |
858 | int mathexit = 0; | |
859 | register enum syntaxcode code; | |
860 | int min_depth = depth; /* Err out if depth gets less than this. */ | |
e5d4f4dc | 861 | int comstyle = 0; /* style of comment encountered */ |
8489eb67 RS |
862 | |
863 | if (depth > 0) min_depth = 0; | |
864 | ||
865 | immediate_quit = 1; | |
866 | QUIT; | |
867 | ||
868 | while (count > 0) | |
869 | { | |
870 | stop = ZV; | |
871 | while (from < stop) | |
872 | { | |
873 | c = FETCH_CHAR (from); | |
e5d4f4dc | 874 | code = SYNTAX (c); |
8489eb67 RS |
875 | from++; |
876 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
877 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from)) | |
878 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
879 | { |
880 | /* we have encountered a comment start sequence and we | |
881 | are ignoring all text inside comments. we must record | |
882 | the comment style this sequence begins so that later, | |
883 | only a comment end of the same style actually ends | |
884 | the comment section */ | |
885 | code = Scomment; | |
886 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
887 | from++; | |
888 | } | |
889 | ||
8489eb67 RS |
890 | if (SYNTAX_PREFIX (c)) |
891 | continue; | |
892 | ||
893 | #ifdef SWITCH_ENUM_BUG | |
894 | switch ((int) code) | |
895 | #else | |
896 | switch (code) | |
897 | #endif | |
898 | { | |
899 | case Sescape: | |
900 | case Scharquote: | |
901 | if (from == stop) goto lose; | |
902 | from++; | |
903 | /* treat following character as a word constituent */ | |
904 | case Sword: | |
905 | case Ssymbol: | |
906 | if (depth || !sexpflag) break; | |
907 | /* This word counts as a sexp; return at end of it. */ | |
908 | while (from < stop) | |
909 | { | |
910 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 911 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 912 | #else |
e5d4f4dc | 913 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
914 | #endif |
915 | { | |
916 | case Scharquote: | |
917 | case Sescape: | |
918 | from++; | |
919 | if (from == stop) goto lose; | |
920 | break; | |
921 | case Sword: | |
922 | case Ssymbol: | |
923 | case Squote: | |
924 | break; | |
925 | default: | |
926 | goto done; | |
927 | } | |
928 | from++; | |
929 | } | |
930 | goto done; | |
931 | ||
932 | case Scomment: | |
933 | if (!parse_sexp_ignore_comments) break; | |
934 | while (1) | |
935 | { | |
c01f7ec0 RS |
936 | if (from == stop) |
937 | { | |
938 | if (depth == 0) | |
939 | goto done; | |
940 | goto lose; | |
941 | } | |
e5d4f4dc RS |
942 | c = FETCH_CHAR (from); |
943 | if (SYNTAX (c) == Sendcomment | |
944 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
945 | /* we have encountered a comment end of the same style | |
946 | as the comment sequence which began this comment | |
947 | section */ | |
8489eb67 RS |
948 | break; |
949 | from++; | |
950 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
e5d4f4dc RS |
951 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
952 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
953 | /* we have encountered a comment end of the same style | |
954 | as the comment sequence which began this comment | |
955 | section */ | |
8489eb67 RS |
956 | { from++; break; } |
957 | } | |
958 | break; | |
959 | ||
960 | case Smath: | |
961 | if (!sexpflag) | |
962 | break; | |
963 | if (from != stop && c == FETCH_CHAR (from)) | |
964 | from++; | |
965 | if (mathexit) | |
966 | { | |
967 | mathexit = 0; | |
968 | goto close1; | |
969 | } | |
970 | mathexit = 1; | |
971 | ||
972 | case Sopen: | |
973 | if (!++depth) goto done; | |
974 | break; | |
975 | ||
976 | case Sclose: | |
977 | close1: | |
978 | if (!--depth) goto done; | |
979 | if (depth < min_depth) | |
980 | error ("Containing expression ends prematurely"); | |
981 | break; | |
982 | ||
983 | case Sstring: | |
984 | stringterm = FETCH_CHAR (from - 1); | |
985 | while (1) | |
986 | { | |
987 | if (from >= stop) goto lose; | |
988 | if (FETCH_CHAR (from) == stringterm) break; | |
989 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 990 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 991 | #else |
e5d4f4dc | 992 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
993 | #endif |
994 | { | |
995 | case Scharquote: | |
996 | case Sescape: | |
997 | from++; | |
998 | } | |
999 | from++; | |
1000 | } | |
1001 | from++; | |
1002 | if (!depth && sexpflag) goto done; | |
1003 | break; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /* Reached end of buffer. Error if within object, return nil if between */ | |
1008 | if (depth) goto lose; | |
1009 | ||
1010 | immediate_quit = 0; | |
1011 | return Qnil; | |
1012 | ||
1013 | /* End of object reached */ | |
1014 | done: | |
1015 | count--; | |
1016 | } | |
1017 | ||
1018 | while (count < 0) | |
1019 | { | |
1020 | stop = BEGV; | |
1021 | while (from > stop) | |
1022 | { | |
1023 | from--; | |
1024 | if (quoted = char_quoted (from)) | |
1025 | from--; | |
1026 | c = FETCH_CHAR (from); | |
1027 | code = SYNTAX (c); | |
7fc8191e RS |
1028 | comstyle = 0; |
1029 | if (code == Sendcomment) | |
1030 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 RS |
1031 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1032 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
1033 | && !char_quoted (from - 1) | |
1034 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
1035 | { |
1036 | /* we must record the comment style encountered so that | |
1037 | later, we can match only the proper comment begin | |
1038 | sequence of the same style */ | |
1039 | code = Sendcomment; | |
1040 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
1041 | from--; | |
1042 | } | |
1043 | ||
8489eb67 RS |
1044 | if (SYNTAX_PREFIX (c)) |
1045 | continue; | |
1046 | ||
1047 | #ifdef SWITCH_ENUM_BUG | |
1048 | switch ((int) (quoted ? Sword : code)) | |
1049 | #else | |
1050 | switch (quoted ? Sword : code) | |
1051 | #endif | |
1052 | { | |
1053 | case Sword: | |
1054 | case Ssymbol: | |
1055 | if (depth || !sexpflag) break; | |
1056 | /* This word counts as a sexp; count object finished after passing it. */ | |
1057 | while (from > stop) | |
1058 | { | |
1059 | quoted = char_quoted (from - 1); | |
1060 | if (quoted) | |
1061 | from--; | |
e5d4f4dc RS |
1062 | if (! (quoted || SYNTAX (FETCH_CHAR (from - 1)) == Sword |
1063 | || SYNTAX (FETCH_CHAR (from - 1)) == Ssymbol | |
1064 | || SYNTAX (FETCH_CHAR (from - 1)) == Squote)) | |
8489eb67 RS |
1065 | goto done2; |
1066 | from--; | |
1067 | } | |
1068 | goto done2; | |
1069 | ||
1070 | case Smath: | |
1071 | if (!sexpflag) | |
1072 | break; | |
1073 | if (from != stop && c == FETCH_CHAR (from - 1)) | |
1074 | from--; | |
1075 | if (mathexit) | |
1076 | { | |
1077 | mathexit = 0; | |
1078 | goto open2; | |
1079 | } | |
1080 | mathexit = 1; | |
1081 | ||
1082 | case Sclose: | |
1083 | if (!++depth) goto done2; | |
1084 | break; | |
1085 | ||
1086 | case Sopen: | |
1087 | open2: | |
1088 | if (!--depth) goto done2; | |
1089 | if (depth < min_depth) | |
1090 | error ("Containing expression ends prematurely"); | |
1091 | break; | |
1092 | ||
1093 | case Sendcomment: | |
1094 | if (!parse_sexp_ignore_comments) | |
1095 | break; | |
8f9dc2ed | 1096 | #if 0 |
37bef230 RS |
1097 | if (code != SYNTAX (c)) |
1098 | /* For a two-char comment ender, we can assume | |
1099 | it does end a comment. So scan back in a simple way. */ | |
1100 | { | |
1101 | if (from != stop) from--; | |
1102 | while (1) | |
1103 | { | |
1104 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
1105 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
1106 | break; | |
c01f7ec0 RS |
1107 | if (from == stop) |
1108 | { | |
1109 | if (depth == 0) | |
1110 | goto done2; | |
1111 | goto lose; | |
1112 | } | |
37bef230 RS |
1113 | from--; |
1114 | if (SYNTAX_COMSTART_SECOND (c) | |
1115 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
1116 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
1117 | && !char_quoted (from)) | |
1118 | break; | |
1119 | } | |
1120 | break; | |
1121 | } | |
8f9dc2ed | 1122 | #endif /* 0 */ |
37bef230 | 1123 | |
8489eb67 RS |
1124 | /* Look back, counting the parity of string-quotes, |
1125 | and recording the comment-starters seen. | |
1126 | When we reach a safe place, assume that's not in a string; | |
1127 | then step the main scan to the earliest comment-starter seen | |
1128 | an even number of string quotes away from the safe place. | |
1129 | ||
1130 | OFROM[I] is position of the earliest comment-starter seen | |
1131 | which is I+2X quotes from the comment-end. | |
1132 | PARITY is current parity of quotes from the comment end. */ | |
1133 | { | |
8489eb67 | 1134 | int parity = 0; |
e5d4f4dc RS |
1135 | char my_stringend = 0; |
1136 | int string_lossage = 0; | |
1137 | int comment_end = from; | |
37bef230 RS |
1138 | int comstart_pos = 0; |
1139 | int comstart_parity = 0; | |
8489eb67 RS |
1140 | |
1141 | /* At beginning of range to scan, we're outside of strings; | |
1142 | that determines quote parity to the comment-end. */ | |
1143 | while (from != stop) | |
1144 | { | |
1145 | /* Move back and examine a character. */ | |
1146 | from--; | |
1147 | ||
1148 | c = FETCH_CHAR (from); | |
1149 | code = SYNTAX (c); | |
1150 | ||
1151 | /* If this char is the second of a 2-char comment sequence, | |
1152 | back up and give the pair the appropriate syntax. */ | |
1153 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
1154 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
e5d4f4dc RS |
1155 | { |
1156 | code = Sendcomment; | |
1157 | from--; | |
1158 | } | |
1159 | ||
8489eb67 | 1160 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) |
e5d4f4dc RS |
1161 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) |
1162 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
1163 | { | |
1164 | code = Scomment; | |
1165 | from--; | |
1166 | } | |
8489eb67 RS |
1167 | |
1168 | /* Ignore escaped characters. */ | |
1169 | if (char_quoted (from)) | |
1170 | continue; | |
1171 | ||
37bef230 | 1172 | /* Track parity of quotes. */ |
8489eb67 | 1173 | if (code == Sstring) |
e5d4f4dc RS |
1174 | { |
1175 | parity ^= 1; | |
1176 | if (my_stringend == 0) | |
1177 | my_stringend = c; | |
37bef230 | 1178 | /* If we have two kinds of string delimiters. |
e5d4f4dc RS |
1179 | There's no way to grok this scanning backwards. */ |
1180 | else if (my_stringend != c) | |
1181 | string_lossage = 1; | |
1182 | } | |
8489eb67 RS |
1183 | |
1184 | /* Record comment-starters according to that | |
1185 | quote-parity to the comment-end. */ | |
1186 | if (code == Scomment) | |
37bef230 RS |
1187 | { |
1188 | comstart_parity = parity; | |
1189 | comstart_pos = from; | |
1190 | } | |
8489eb67 | 1191 | |
37bef230 | 1192 | /* If we find another earlier comment-ender, |
eb8c3be9 | 1193 | any comment-starts earlier than that don't count |
37bef230 | 1194 | (because they go with the earlier comment-ender). */ |
e5d4f4dc RS |
1195 | if (code == Sendcomment |
1196 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
8489eb67 | 1197 | break; |
37bef230 RS |
1198 | |
1199 | /* Assume a defun-start point is outside of strings. */ | |
1200 | if (code == Sopen | |
1201 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
1202 | break; | |
8489eb67 | 1203 | } |
37bef230 RS |
1204 | |
1205 | if (comstart_pos == 0) | |
1206 | from = comment_end; | |
1207 | /* If the earliest comment starter | |
1208 | is followed by uniform paired string quotes or none, | |
1209 | we know it can't be inside a string | |
1210 | since if it were then the comment ender would be inside one. | |
1211 | So it does start a comment. Skip back to it. */ | |
1212 | else if (comstart_parity == 0 && !string_lossage) | |
1213 | from = comstart_pos; | |
1214 | else | |
e5d4f4dc RS |
1215 | { |
1216 | /* We had two kinds of string delimiters mixed up | |
1217 | together. Decode this going forwards. | |
1218 | Scan fwd from the previous comment ender | |
1219 | to the one in question; this records where we | |
1220 | last passed a comment starter. */ | |
1221 | struct lisp_parse_state state; | |
37bef230 | 1222 | scan_sexps_forward (&state, find_defun_start (comment_end), |
340f92b5 | 1223 | comment_end - 1, -10000, 0, Qnil, 0); |
e5d4f4dc RS |
1224 | if (state.incomment) |
1225 | from = state.comstart; | |
1226 | else | |
1227 | /* We can't grok this as a comment; scan it normally. */ | |
1228 | from = comment_end; | |
1229 | } | |
8489eb67 RS |
1230 | } |
1231 | break; | |
1232 | ||
1233 | case Sstring: | |
1234 | stringterm = FETCH_CHAR (from); | |
1235 | while (1) | |
1236 | { | |
1237 | if (from == stop) goto lose; | |
1238 | if (!char_quoted (from - 1) | |
1239 | && stringterm == FETCH_CHAR (from - 1)) | |
1240 | break; | |
1241 | from--; | |
1242 | } | |
1243 | from--; | |
1244 | if (!depth && sexpflag) goto done2; | |
1245 | break; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | /* Reached start of buffer. Error if within object, return nil if between */ | |
1250 | if (depth) goto lose; | |
1251 | ||
1252 | immediate_quit = 0; | |
1253 | return Qnil; | |
1254 | ||
1255 | done2: | |
1256 | count++; | |
1257 | } | |
1258 | ||
1259 | ||
1260 | immediate_quit = 0; | |
1261 | XFASTINT (val) = from; | |
1262 | return val; | |
1263 | ||
1264 | lose: | |
1265 | error ("Unbalanced parentheses"); | |
1266 | /* NOTREACHED */ | |
1267 | } | |
1268 | ||
340f92b5 | 1269 | static int |
8489eb67 RS |
1270 | char_quoted (pos) |
1271 | register int pos; | |
1272 | { | |
1273 | register enum syntaxcode code; | |
1274 | register int beg = BEGV; | |
1275 | register int quoted = 0; | |
1276 | ||
1277 | while (pos > beg | |
1278 | && ((code = SYNTAX (FETCH_CHAR (pos - 1))) == Scharquote | |
1279 | || code == Sescape)) | |
1280 | pos--, quoted = !quoted; | |
1281 | return quoted; | |
1282 | } | |
1283 | ||
1284 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, | |
1285 | "Scan from character number FROM by COUNT lists.\n\ | |
1286 | Returns the character number of the position thus found.\n\ | |
1287 | \n\ | |
1288 | If DEPTH is nonzero, paren depth begins counting from that value,\n\ | |
1289 | only places where the depth in parentheses becomes zero\n\ | |
1290 | are candidates for stopping; COUNT such places are counted.\n\ | |
1291 | Thus, a positive value for DEPTH means go out levels.\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 | and the depth is wrong, an error is signaled.\n\ | |
1297 | If the depth is right but the count is not used up, nil is returned.") | |
1298 | (from, count, depth) | |
1299 | Lisp_Object from, count, depth; | |
1300 | { | |
1301 | CHECK_NUMBER (from, 0); | |
1302 | CHECK_NUMBER (count, 1); | |
1303 | CHECK_NUMBER (depth, 2); | |
1304 | ||
1305 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
1306 | } | |
1307 | ||
1308 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
1309 | "Scan from character number FROM by COUNT balanced expressions.\n\ | |
1310 | If COUNT is negative, scan backwards.\n\ | |
1311 | Returns the character number of the position thus found.\n\ | |
1312 | \n\ | |
1313 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
1314 | \n\ | |
1315 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
1316 | in the middle of a parenthetical grouping, an error is signaled.\n\ | |
1317 | If the beginning or end is reached between groupings\n\ | |
1318 | but before count is used up, nil is returned.") | |
1319 | (from, count) | |
1320 | Lisp_Object from, count; | |
1321 | { | |
1322 | CHECK_NUMBER (from, 0); | |
1323 | CHECK_NUMBER (count, 1); | |
1324 | ||
1325 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
1326 | } | |
1327 | ||
1328 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
1329 | 0, 0, 0, | |
1330 | "Move point backward over any number of chars with prefix syntax.\n\ | |
1331 | This includes chars with \"quote\" or \"prefix\" syntax (' or p).") | |
1332 | () | |
1333 | { | |
1334 | int beg = BEGV; | |
1335 | int pos = point; | |
1336 | ||
1337 | while (pos > beg && !char_quoted (pos - 1) | |
1338 | && (SYNTAX (FETCH_CHAR (pos - 1)) == Squote | |
1339 | || SYNTAX_PREFIX (FETCH_CHAR (pos - 1)))) | |
1340 | pos--; | |
1341 | ||
1342 | SET_PT (pos); | |
1343 | ||
1344 | return Qnil; | |
1345 | } | |
1346 | \f | |
8489eb67 | 1347 | /* Parse forward from FROM to END, |
e5d4f4dc RS |
1348 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
1349 | and return a description of the state of the parse at END. | |
c81a3712 RS |
1350 | If STOPBEFORE is nonzero, stop at the start of an atom. |
1351 | If COMMENTSTOP is nonzero, stop at the start of a comment. */ | |
8489eb67 | 1352 | |
340f92b5 | 1353 | static void |
c81a3712 RS |
1354 | scan_sexps_forward (stateptr, from, end, targetdepth, |
1355 | stopbefore, oldstate, commentstop) | |
e5d4f4dc | 1356 | struct lisp_parse_state *stateptr; |
8489eb67 RS |
1357 | register int from; |
1358 | int end, targetdepth, stopbefore; | |
1359 | Lisp_Object oldstate; | |
c81a3712 | 1360 | int commentstop; |
8489eb67 RS |
1361 | { |
1362 | struct lisp_parse_state state; | |
1363 | ||
1364 | register enum syntaxcode code; | |
1365 | struct level { int last, prev; }; | |
1366 | struct level levelstart[100]; | |
1367 | register struct level *curlevel = levelstart; | |
1368 | struct level *endlevel = levelstart + 100; | |
1369 | char prev; | |
1370 | register int depth; /* Paren depth of current scanning location. | |
1371 | level - levelstart equals this except | |
1372 | when the depth becomes negative. */ | |
1373 | int mindepth; /* Lowest DEPTH value seen. */ | |
1374 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
1375 | Lisp_Object tem; | |
1376 | ||
1377 | immediate_quit = 1; | |
1378 | QUIT; | |
1379 | ||
265a9e55 | 1380 | if (NILP (oldstate)) |
8489eb67 RS |
1381 | { |
1382 | depth = 0; | |
1383 | state.instring = -1; | |
1384 | state.incomment = 0; | |
e5d4f4dc | 1385 | state.comstyle = 0; /* comment style a by default */ |
8489eb67 RS |
1386 | } |
1387 | else | |
1388 | { | |
1389 | tem = Fcar (oldstate); | |
265a9e55 | 1390 | if (!NILP (tem)) |
8489eb67 RS |
1391 | depth = XINT (tem); |
1392 | else | |
1393 | depth = 0; | |
1394 | ||
1395 | oldstate = Fcdr (oldstate); | |
1396 | oldstate = Fcdr (oldstate); | |
1397 | oldstate = Fcdr (oldstate); | |
1398 | tem = Fcar (oldstate); | |
265a9e55 | 1399 | state.instring = !NILP (tem) ? XINT (tem) : -1; |
8489eb67 RS |
1400 | |
1401 | oldstate = Fcdr (oldstate); | |
1402 | tem = Fcar (oldstate); | |
265a9e55 | 1403 | state.incomment = !NILP (tem); |
8489eb67 RS |
1404 | |
1405 | oldstate = Fcdr (oldstate); | |
1406 | tem = Fcar (oldstate); | |
265a9e55 | 1407 | start_quoted = !NILP (tem); |
e5d4f4dc RS |
1408 | |
1409 | /* if the eight element of the list is nil, we are in comment | |
1410 | style a. if it is non-nil, we are in comment style b */ | |
1411 | oldstate = Fcdr (oldstate); | |
1412 | oldstate = Fcdr (oldstate); | |
e5d4f4dc RS |
1413 | tem = Fcar (oldstate); |
1414 | state.comstyle = !NILP (tem); | |
8489eb67 RS |
1415 | } |
1416 | state.quoted = 0; | |
1417 | mindepth = depth; | |
1418 | ||
1419 | curlevel->prev = -1; | |
1420 | curlevel->last = -1; | |
1421 | ||
1422 | /* Enter the loop at a place appropriate for initial state. */ | |
1423 | ||
1424 | if (state.incomment) goto startincomment; | |
1425 | if (state.instring >= 0) | |
1426 | { | |
1427 | if (start_quoted) goto startquotedinstring; | |
1428 | goto startinstring; | |
1429 | } | |
1430 | if (start_quoted) goto startquoted; | |
1431 | ||
1432 | while (from < end) | |
1433 | { | |
e5d4f4dc | 1434 | code = SYNTAX (FETCH_CHAR (from)); |
8489eb67 | 1435 | from++; |
8f9dc2ed RS |
1436 | if (code == Scomment) |
1437 | state.comstart = from-1; | |
1438 | ||
1439 | else if (from < end && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
1440 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
e5d4f4dc RS |
1441 | { |
1442 | /* Record the comment style we have entered so that only | |
1443 | the comment-end sequence of the same style actually | |
1444 | terminates the comment section. */ | |
1445 | code = Scomment; | |
1446 | state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
8f9dc2ed | 1447 | state.comstart = from-1; |
e5d4f4dc RS |
1448 | from++; |
1449 | } | |
1450 | ||
8489eb67 RS |
1451 | if (SYNTAX_PREFIX (FETCH_CHAR (from - 1))) |
1452 | continue; | |
1453 | #ifdef SWITCH_ENUM_BUG | |
1454 | switch ((int) code) | |
1455 | #else | |
1456 | switch (code) | |
1457 | #endif | |
1458 | { | |
1459 | case Sescape: | |
1460 | case Scharquote: | |
1461 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1462 | curlevel->last = from - 1; | |
1463 | startquoted: | |
1464 | if (from == end) goto endquoted; | |
1465 | from++; | |
1466 | goto symstarted; | |
1467 | /* treat following character as a word constituent */ | |
1468 | case Sword: | |
1469 | case Ssymbol: | |
1470 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1471 | curlevel->last = from - 1; | |
1472 | symstarted: | |
1473 | while (from < end) | |
1474 | { | |
1475 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1476 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1477 | #else |
e5d4f4dc | 1478 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1479 | #endif |
1480 | { | |
1481 | case Scharquote: | |
1482 | case Sescape: | |
1483 | from++; | |
1484 | if (from == end) goto endquoted; | |
1485 | break; | |
1486 | case Sword: | |
1487 | case Ssymbol: | |
1488 | case Squote: | |
1489 | break; | |
1490 | default: | |
1491 | goto symdone; | |
1492 | } | |
1493 | from++; | |
1494 | } | |
1495 | symdone: | |
1496 | curlevel->prev = curlevel->last; | |
1497 | break; | |
1498 | ||
1499 | case Scomment: | |
1500 | state.incomment = 1; | |
1501 | startincomment: | |
c81a3712 RS |
1502 | if (commentstop) |
1503 | goto done; | |
8489eb67 RS |
1504 | while (1) |
1505 | { | |
1506 | if (from == end) goto done; | |
e5d4f4dc RS |
1507 | prev = FETCH_CHAR (from); |
1508 | if (SYNTAX (prev) == Sendcomment | |
1509 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1510 | /* Only terminate the comment section if the endcomment | |
1511 | of the same style as the start sequence has been | |
1512 | encountered. */ | |
8489eb67 RS |
1513 | break; |
1514 | from++; | |
1515 | if (from < end && SYNTAX_COMEND_FIRST (prev) | |
e5d4f4dc RS |
1516 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
1517 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1518 | /* Only terminate the comment section if the end-comment | |
1519 | sequence of the same style as the start sequence has | |
1520 | been encountered. */ | |
8489eb67 RS |
1521 | { from++; break; } |
1522 | } | |
1523 | state.incomment = 0; | |
e5d4f4dc | 1524 | state.comstyle = 0; /* reset the comment style */ |
8489eb67 RS |
1525 | break; |
1526 | ||
1527 | case Sopen: | |
1528 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1529 | depth++; | |
1530 | /* curlevel++->last ran into compiler bug on Apollo */ | |
1531 | curlevel->last = from - 1; | |
1532 | if (++curlevel == endlevel) | |
1533 | error ("Nesting too deep for parser"); | |
1534 | curlevel->prev = -1; | |
1535 | curlevel->last = -1; | |
1536 | if (!--targetdepth) goto done; | |
1537 | break; | |
1538 | ||
1539 | case Sclose: | |
1540 | depth--; | |
1541 | if (depth < mindepth) | |
1542 | mindepth = depth; | |
1543 | if (curlevel != levelstart) | |
1544 | curlevel--; | |
1545 | curlevel->prev = curlevel->last; | |
1546 | if (!++targetdepth) goto done; | |
1547 | break; | |
1548 | ||
1549 | case Sstring: | |
1550 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1551 | curlevel->last = from - 1; | |
1552 | state.instring = FETCH_CHAR (from - 1); | |
1553 | startinstring: | |
1554 | while (1) | |
1555 | { | |
1556 | if (from >= end) goto done; | |
1557 | if (FETCH_CHAR (from) == state.instring) break; | |
1558 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1559 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1560 | #else |
e5d4f4dc | 1561 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1562 | #endif |
1563 | { | |
1564 | case Scharquote: | |
1565 | case Sescape: | |
1566 | from++; | |
1567 | startquotedinstring: | |
1568 | if (from >= end) goto endquoted; | |
1569 | } | |
1570 | from++; | |
1571 | } | |
1572 | state.instring = -1; | |
1573 | curlevel->prev = curlevel->last; | |
1574 | from++; | |
1575 | break; | |
1576 | ||
1577 | case Smath: | |
1578 | break; | |
1579 | } | |
1580 | } | |
1581 | goto done; | |
1582 | ||
1583 | stop: /* Here if stopping before start of sexp. */ | |
1584 | from--; /* We have just fetched the char that starts it; */ | |
1585 | goto done; /* but return the position before it. */ | |
1586 | ||
1587 | endquoted: | |
1588 | state.quoted = 1; | |
1589 | done: | |
1590 | state.depth = depth; | |
1591 | state.mindepth = mindepth; | |
1592 | state.thislevelstart = curlevel->prev; | |
1593 | state.prevlevelstart | |
1594 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
1595 | state.location = from; | |
1596 | immediate_quit = 0; | |
1597 | ||
e5d4f4dc | 1598 | *stateptr = state; |
8489eb67 RS |
1599 | } |
1600 | ||
1601 | /* This comment supplies the doc string for parse-partial-sexp, | |
1602 | for make-docfile to see. We cannot put this in the real DEFUN | |
1603 | due to limits in the Unix cpp. | |
1604 | ||
c81a3712 | 1605 | DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0, |
8489eb67 RS |
1606 | "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\ |
1607 | Parsing stops at TO or when certain criteria are met;\n\ | |
1608 | point is set to where parsing stops.\n\ | |
1609 | If fifth arg STATE is omitted or nil,\n\ | |
1610 | parsing assumes that FROM is the beginning of a function.\n\ | |
e5d4f4dc | 1611 | Value is a list of eight elements describing final state of parsing:\n\ |
af50f9e5 RS |
1612 | 0. depth in parens.\n\ |
1613 | 1. character address of start of innermost containing list; nil if none.\n\ | |
1614 | 2. character address of start of last complete sexp terminated.\n\ | |
1615 | 3. non-nil if inside a string.\n\ | |
8489eb67 | 1616 | (it is the character that will terminate the string.)\n\ |
af50f9e5 RS |
1617 | 4. t if inside a comment.\n\ |
1618 | 5. t if following a quote character.\n\ | |
1619 | 6. the minimum paren-depth encountered during this scan.\n\ | |
1620 | 7. t if in a comment of style `b'.\n\ | |
8489eb67 RS |
1621 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\ |
1622 | in parentheses becomes equal to TARGETDEPTH.\n\ | |
1623 | Fourth arg STOPBEFORE non-nil means stop when come to\n\ | |
1624 | any character that starts a sexp.\n\ | |
ec11639d | 1625 | Fifth arg STATE is an eight-list like what this function returns.\n\ |
a4275ad1 | 1626 | It is used to initialize the state of the parse. Its second and third |
c81a3712 RS |
1627 | elements are ignored. |
1628 | Sixth args COMMENTSTOP non-nil means stop at the start of a comment.") | |
1629 | (from, to, targetdepth, stopbefore, state, commentstop) | |
8489eb67 RS |
1630 | */ |
1631 | ||
c81a3712 | 1632 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
8489eb67 | 1633 | 0 /* See immediately above */) |
c81a3712 RS |
1634 | (from, to, targetdepth, stopbefore, oldstate, commentstop) |
1635 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; | |
8489eb67 RS |
1636 | { |
1637 | struct lisp_parse_state state; | |
1638 | int target; | |
1639 | ||
265a9e55 | 1640 | if (!NILP (targetdepth)) |
8489eb67 RS |
1641 | { |
1642 | CHECK_NUMBER (targetdepth, 3); | |
1643 | target = XINT (targetdepth); | |
1644 | } | |
1645 | else | |
1646 | target = -100000; /* We won't reach this depth */ | |
1647 | ||
1648 | validate_region (&from, &to); | |
e5d4f4dc | 1649 | scan_sexps_forward (&state, XINT (from), XINT (to), |
c81a3712 RS |
1650 | target, !NILP (stopbefore), oldstate, |
1651 | !NILP (commentstop)); | |
8489eb67 RS |
1652 | |
1653 | SET_PT (state.location); | |
1654 | ||
1655 | return Fcons (make_number (state.depth), | |
1656 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
1657 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
1658 | Fcons (state.instring >= 0 ? make_number (state.instring) : Qnil, | |
1659 | Fcons (state.incomment ? Qt : Qnil, | |
1660 | Fcons (state.quoted ? Qt : Qnil, | |
e5d4f4dc RS |
1661 | Fcons (make_number (state.mindepth), |
1662 | Fcons (state.comstyle ? Qt : Qnil, | |
1663 | Qnil)))))))); | |
8489eb67 RS |
1664 | } |
1665 | \f | |
1666 | init_syntax_once () | |
1667 | { | |
1668 | register int i; | |
1669 | register struct Lisp_Vector *v; | |
1670 | ||
1671 | /* Set this now, so first buffer creation can refer to it. */ | |
1672 | /* Make it nil before calling copy-syntax-table | |
1673 | so that copy-syntax-table will know not to try to copy from garbage */ | |
1674 | Vstandard_syntax_table = Qnil; | |
1675 | Vstandard_syntax_table = Fcopy_syntax_table (Qnil); | |
1676 | ||
1677 | v = XVECTOR (Vstandard_syntax_table); | |
1678 | ||
1679 | for (i = 'a'; i <= 'z'; i++) | |
1680 | XFASTINT (v->contents[i]) = (int) Sword; | |
1681 | for (i = 'A'; i <= 'Z'; i++) | |
1682 | XFASTINT (v->contents[i]) = (int) Sword; | |
1683 | for (i = '0'; i <= '9'; i++) | |
1684 | XFASTINT (v->contents[i]) = (int) Sword; | |
1685 | XFASTINT (v->contents['$']) = (int) Sword; | |
1686 | XFASTINT (v->contents['%']) = (int) Sword; | |
1687 | ||
1688 | XFASTINT (v->contents['(']) = (int) Sopen + (')' << 8); | |
1689 | XFASTINT (v->contents[')']) = (int) Sclose + ('(' << 8); | |
1690 | XFASTINT (v->contents['[']) = (int) Sopen + (']' << 8); | |
1691 | XFASTINT (v->contents[']']) = (int) Sclose + ('[' << 8); | |
1692 | XFASTINT (v->contents['{']) = (int) Sopen + ('}' << 8); | |
1693 | XFASTINT (v->contents['}']) = (int) Sclose + ('{' << 8); | |
1694 | XFASTINT (v->contents['"']) = (int) Sstring; | |
1695 | XFASTINT (v->contents['\\']) = (int) Sescape; | |
1696 | ||
1697 | for (i = 0; i < 10; i++) | |
1698 | XFASTINT (v->contents["_-+*/&|<>="[i]]) = (int) Ssymbol; | |
1699 | ||
1700 | for (i = 0; i < 12; i++) | |
1701 | XFASTINT (v->contents[".,;:?!#@~^'`"[i]]) = (int) Spunct; | |
1702 | } | |
1703 | ||
1704 | syms_of_syntax () | |
1705 | { | |
1706 | Qsyntax_table_p = intern ("syntax-table-p"); | |
1707 | staticpro (&Qsyntax_table_p); | |
1708 | ||
1709 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, | |
1710 | "Non-nil means `forward-sexp', etc., should treat comments as whitespace."); | |
1711 | ||
1712 | words_include_escapes = 0; | |
1713 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
1714 | "Non-nil means `forward-word', etc., should treat escape chars part of words."); | |
1715 | ||
1716 | defsubr (&Ssyntax_table_p); | |
1717 | defsubr (&Ssyntax_table); | |
1718 | defsubr (&Sstandard_syntax_table); | |
1719 | defsubr (&Scopy_syntax_table); | |
1720 | defsubr (&Sset_syntax_table); | |
1721 | defsubr (&Schar_syntax); | |
1722 | defsubr (&Smodify_syntax_entry); | |
1723 | defsubr (&Sdescribe_syntax); | |
1724 | ||
1725 | defsubr (&Sforward_word); | |
1726 | ||
b3cfe0c8 | 1727 | defsubr (&Sforward_comment); |
8489eb67 RS |
1728 | defsubr (&Sscan_lists); |
1729 | defsubr (&Sscan_sexps); | |
1730 | defsubr (&Sbackward_prefix_chars); | |
1731 | defsubr (&Sparse_partial_sexp); | |
1732 | } |