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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); | |
beefa22e RS |
226 | return make_number (syntax_code_spec[(int) SYNTAX (XINT (ch))]); |
227 | } | |
228 | ||
229 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
230 | "Return the matching parenthesis of CHAR, or nil if none.") | |
231 | (ch) | |
232 | Lisp_Object ch; | |
233 | { | |
234 | int code; | |
235 | CHECK_NUMBER (ch, 0); | |
236 | code = SYNTAX (XINT (ch)); | |
237 | if (code == Sopen && code == Sclose) | |
238 | return make_number (SYNTAX_MATCH (XINT (ch))); | |
239 | return Qnil; | |
8489eb67 RS |
240 | } |
241 | ||
242 | /* This comment supplies the doc string for modify-syntax-entry, | |
243 | for make-docfile to see. We cannot put this in the real DEFUN | |
244 | due to limits in the Unix cpp. | |
245 | ||
2fcea188 | 246 | DEFUN ("modify-syntax-entry", foo, bar, 2, 3, 0, |
8489eb67 RS |
247 | "Set syntax for character CHAR according to string S.\n\ |
248 | The syntax is changed only for table TABLE, which defaults to\n\ | |
249 | the current buffer's syntax table.\n\ | |
250 | The first character of S should be one of the following:\n\ | |
32676c08 JB |
251 | Space or - whitespace syntax. w word constituent.\n\ |
252 | _ symbol constituent. . punctuation.\n\ | |
253 | ( open-parenthesis. ) close-parenthesis.\n\ | |
254 | \" string quote. \\ escape.\n\ | |
255 | $ paired delimiter. ' expression quote or prefix operator.\n\ | |
abae13bd | 256 | < comment starter. > comment ender.\n\ |
6cb71bf6 | 257 | / character-quote. @ inherit from `standard-syntax-table'.\n\ |
abae13bd | 258 | \n\ |
8489eb67 RS |
259 | Only single-character comment start and end sequences are represented thus.\n\ |
260 | Two-character sequences are represented as described below.\n\ | |
261 | The second character of S is the matching parenthesis,\n\ | |
262 | used only if the first character is `(' or `)'.\n\ | |
263 | Any additional characters are flags.\n\ | |
e5d4f4dc | 264 | Defined flags are the characters 1, 2, 3, 4, b, and p.\n\ |
8489eb67 RS |
265 | 1 means C is the start of a two-char comment start sequence.\n\ |
266 | 2 means C is the second character of such a sequence.\n\ | |
267 | 3 means C is the start of a two-char comment end sequence.\n\ | |
268 | 4 means C is the second character of such a sequence.\n\ | |
e5d4f4dc RS |
269 | \n\ |
270 | There can be up to two orthogonal comment sequences. This is to support\n\ | |
271 | language modes such as C++. By default, all comment sequences are of style\n\ | |
abae13bd RS |
272 | a, but you can set the comment sequence style to b (on the second character\n\ |
273 | of a comment-start, or the first character of a comment-end sequence) using\n\ | |
e5d4f4dc RS |
274 | this flag:\n\ |
275 | b means C is part of comment sequence b.\n\ | |
276 | \n\ | |
277 | p means C is a prefix character for `backward-prefix-chars';\n\ | |
278 | such characters are treated as whitespace when they occur\n\ | |
8489eb67 | 279 | between expressions.") |
2fcea188 | 280 | (char, s, table) |
8489eb67 RS |
281 | */ |
282 | ||
283 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, | |
284 | /* I really don't know why this is interactive | |
285 | help-form should at least be made useful whilst reading the second arg | |
286 | */ | |
287 | "cSet syntax for character: \nsSet syntax for %s to: ", | |
288 | 0 /* See immediately above */) | |
289 | (c, newentry, syntax_table) | |
290 | Lisp_Object c, newentry, syntax_table; | |
291 | { | |
292 | register unsigned char *p, match; | |
293 | register enum syntaxcode code; | |
294 | Lisp_Object val; | |
295 | ||
296 | CHECK_NUMBER (c, 0); | |
297 | CHECK_STRING (newentry, 1); | |
265a9e55 | 298 | if (NILP (syntax_table)) |
8489eb67 RS |
299 | syntax_table = current_buffer->syntax_table; |
300 | else | |
301 | syntax_table = check_syntax_table (syntax_table); | |
302 | ||
303 | p = XSTRING (newentry)->data; | |
304 | code = (enum syntaxcode) syntax_spec_code[*p++]; | |
305 | if (((int) code & 0377) == 0377) | |
306 | error ("invalid syntax description letter: %c", c); | |
307 | ||
308 | match = *p; | |
309 | if (match) p++; | |
310 | if (match == ' ') match = 0; | |
311 | ||
312 | XFASTINT (val) = (match << 8) + (int) code; | |
313 | while (*p) | |
314 | switch (*p++) | |
315 | { | |
316 | case '1': | |
317 | XFASTINT (val) |= 1 << 16; | |
318 | break; | |
319 | ||
320 | case '2': | |
321 | XFASTINT (val) |= 1 << 17; | |
322 | break; | |
323 | ||
324 | case '3': | |
325 | XFASTINT (val) |= 1 << 18; | |
326 | break; | |
327 | ||
328 | case '4': | |
329 | XFASTINT (val) |= 1 << 19; | |
330 | break; | |
331 | ||
332 | case 'p': | |
333 | XFASTINT (val) |= 1 << 20; | |
334 | break; | |
e5d4f4dc RS |
335 | |
336 | case 'b': | |
337 | XFASTINT (val) |= 1 << 21; | |
338 | break; | |
8489eb67 RS |
339 | } |
340 | ||
341 | XVECTOR (syntax_table)->contents[0xFF & XINT (c)] = val; | |
342 | ||
343 | return Qnil; | |
344 | } | |
345 | \f | |
346 | /* Dump syntax table to buffer in human-readable format */ | |
347 | ||
340f92b5 | 348 | static void |
8489eb67 RS |
349 | describe_syntax (value) |
350 | Lisp_Object value; | |
351 | { | |
352 | register enum syntaxcode code; | |
e5d4f4dc | 353 | char desc, match, start1, start2, end1, end2, prefix, comstyle; |
8489eb67 RS |
354 | char str[2]; |
355 | ||
356 | Findent_to (make_number (16), make_number (1)); | |
357 | ||
358 | if (XTYPE (value) != Lisp_Int) | |
359 | { | |
360 | insert_string ("invalid"); | |
361 | return; | |
362 | } | |
363 | ||
364 | code = (enum syntaxcode) (XINT (value) & 0377); | |
365 | match = (XINT (value) >> 8) & 0377; | |
366 | start1 = (XINT (value) >> 16) & 1; | |
367 | start2 = (XINT (value) >> 17) & 1; | |
368 | end1 = (XINT (value) >> 18) & 1; | |
369 | end2 = (XINT (value) >> 19) & 1; | |
370 | prefix = (XINT (value) >> 20) & 1; | |
e5d4f4dc | 371 | comstyle = (XINT (value) >> 21) & 1; |
8489eb67 RS |
372 | |
373 | if ((int) code < 0 || (int) code >= (int) Smax) | |
374 | { | |
375 | insert_string ("invalid"); | |
376 | return; | |
377 | } | |
378 | desc = syntax_code_spec[(int) code]; | |
379 | ||
380 | str[0] = desc, str[1] = 0; | |
381 | insert (str, 1); | |
382 | ||
383 | str[0] = match ? match : ' '; | |
384 | insert (str, 1); | |
385 | ||
386 | ||
387 | if (start1) | |
388 | insert ("1", 1); | |
389 | if (start2) | |
390 | insert ("2", 1); | |
391 | ||
392 | if (end1) | |
393 | insert ("3", 1); | |
394 | if (end2) | |
395 | insert ("4", 1); | |
396 | ||
397 | if (prefix) | |
398 | insert ("p", 1); | |
e5d4f4dc RS |
399 | if (comstyle) |
400 | insert ("b", 1); | |
8489eb67 RS |
401 | |
402 | insert_string ("\twhich means: "); | |
403 | ||
404 | #ifdef SWITCH_ENUM_BUG | |
405 | switch ((int) code) | |
406 | #else | |
407 | switch (code) | |
408 | #endif | |
409 | { | |
410 | case Swhitespace: | |
411 | insert_string ("whitespace"); break; | |
412 | case Spunct: | |
413 | insert_string ("punctuation"); break; | |
414 | case Sword: | |
415 | insert_string ("word"); break; | |
416 | case Ssymbol: | |
417 | insert_string ("symbol"); break; | |
418 | case Sopen: | |
419 | insert_string ("open"); break; | |
420 | case Sclose: | |
421 | insert_string ("close"); break; | |
422 | case Squote: | |
423 | insert_string ("quote"); break; | |
424 | case Sstring: | |
425 | insert_string ("string"); break; | |
426 | case Smath: | |
427 | insert_string ("math"); break; | |
428 | case Sescape: | |
429 | insert_string ("escape"); break; | |
430 | case Scharquote: | |
431 | insert_string ("charquote"); break; | |
432 | case Scomment: | |
433 | insert_string ("comment"); break; | |
434 | case Sendcomment: | |
435 | insert_string ("endcomment"); break; | |
6cb71bf6 RS |
436 | case Sinherit: |
437 | insert_string ("inherit"); break; | |
8489eb67 RS |
438 | default: |
439 | insert_string ("invalid"); | |
440 | return; | |
441 | } | |
442 | ||
443 | if (match) | |
444 | { | |
445 | insert_string (", matches "); | |
410e16ff | 446 | insert_char (match); |
8489eb67 RS |
447 | } |
448 | ||
449 | if (start1) | |
450 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
451 | if (start2) | |
452 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
453 | ||
454 | if (end1) | |
455 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
456 | if (end2) | |
457 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
458 | if (comstyle) |
459 | insert_string (" (comment style b)"); | |
460 | ||
8489eb67 RS |
461 | if (prefix) |
462 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
463 | ||
464 | insert_string ("\n"); | |
465 | } | |
466 | ||
340f92b5 | 467 | static Lisp_Object |
8489eb67 RS |
468 | describe_syntax_1 (vector) |
469 | Lisp_Object vector; | |
470 | { | |
471 | struct buffer *old = current_buffer; | |
472 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
b3cfe0c8 | 473 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil); |
8489eb67 RS |
474 | set_buffer_internal (old); |
475 | return Qnil; | |
476 | } | |
477 | ||
478 | DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "", | |
479 | "Describe the syntax specifications in the syntax table.\n\ | |
480 | The descriptions are inserted in a buffer, which is then displayed.") | |
481 | () | |
482 | { | |
483 | internal_with_output_to_temp_buffer | |
484 | ("*Help*", describe_syntax_1, current_buffer->syntax_table); | |
485 | ||
486 | return Qnil; | |
487 | } | |
488 | \f | |
489 | /* Return the position across COUNT words from FROM. | |
490 | If that many words cannot be found before the end of the buffer, return 0. | |
491 | COUNT negative means scan backward and stop at word beginning. */ | |
492 | ||
493 | scan_words (from, count) | |
494 | register int from, count; | |
495 | { | |
496 | register int beg = BEGV; | |
497 | register int end = ZV; | |
498 | register int code; | |
499 | ||
500 | immediate_quit = 1; | |
501 | QUIT; | |
502 | ||
503 | while (count > 0) | |
504 | { | |
505 | while (1) | |
506 | { | |
507 | if (from == end) | |
508 | { | |
509 | immediate_quit = 0; | |
510 | return 0; | |
511 | } | |
512 | code = SYNTAX (FETCH_CHAR (from)); | |
513 | if (words_include_escapes | |
514 | && (code == Sescape || code == Scharquote)) | |
515 | break; | |
516 | if (code == Sword) | |
517 | break; | |
518 | from++; | |
519 | } | |
520 | while (1) | |
521 | { | |
522 | if (from == end) break; | |
523 | code = SYNTAX (FETCH_CHAR (from)); | |
524 | if (!(words_include_escapes | |
525 | && (code == Sescape || code == Scharquote))) | |
526 | if (code != Sword) | |
527 | break; | |
528 | from++; | |
529 | } | |
530 | count--; | |
531 | } | |
532 | while (count < 0) | |
533 | { | |
534 | while (1) | |
535 | { | |
536 | if (from == beg) | |
537 | { | |
538 | immediate_quit = 0; | |
539 | return 0; | |
540 | } | |
541 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
542 | if (words_include_escapes | |
543 | && (code == Sescape || code == Scharquote)) | |
544 | break; | |
545 | if (code == Sword) | |
546 | break; | |
547 | from--; | |
548 | } | |
549 | while (1) | |
550 | { | |
551 | if (from == beg) break; | |
552 | code = SYNTAX (FETCH_CHAR (from - 1)); | |
553 | if (!(words_include_escapes | |
554 | && (code == Sescape || code == Scharquote))) | |
555 | if (code != Sword) | |
556 | break; | |
557 | from--; | |
558 | } | |
559 | count++; | |
560 | } | |
561 | ||
562 | immediate_quit = 0; | |
563 | ||
564 | return from; | |
565 | } | |
566 | ||
567 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", | |
568 | "Move point forward ARG words (backward if ARG is negative).\n\ | |
569 | Normally returns t.\n\ | |
570 | If an edge of the buffer is reached, point is left there\n\ | |
571 | and nil is returned.") | |
572 | (count) | |
573 | Lisp_Object count; | |
574 | { | |
575 | int val; | |
576 | CHECK_NUMBER (count, 0); | |
577 | ||
578 | if (!(val = scan_words (point, XINT (count)))) | |
579 | { | |
580 | SET_PT (XINT (count) > 0 ? ZV : BEGV); | |
581 | return Qnil; | |
582 | } | |
583 | SET_PT (val); | |
584 | return Qt; | |
585 | } | |
586 | \f | |
b3cfe0c8 RS |
587 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
588 | "Move forward across up to N comments. If N is negative, move backward.\n\ | |
b3cfe0c8 | 589 | Stop scanning if we find something other than a comment or whitespace.\n\ |
c81a3712 | 590 | Set point to where scanning stops.\n\ |
b3cfe0c8 RS |
591 | If N comments are found as expected, with nothing except whitespace\n\ |
592 | between them, return t; otherwise return nil.") | |
593 | (count) | |
840f481c | 594 | Lisp_Object count; |
b3cfe0c8 RS |
595 | { |
596 | register int from; | |
597 | register int stop; | |
598 | register int c; | |
599 | register enum syntaxcode code; | |
600 | int comstyle = 0; /* style of comment encountered */ | |
be720845 | 601 | int found; |
840f481c RS |
602 | int count1; |
603 | ||
604 | CHECK_NUMBER (count, 0); | |
605 | count1 = XINT (count); | |
b3cfe0c8 RS |
606 | |
607 | immediate_quit = 1; | |
608 | QUIT; | |
609 | ||
610 | from = PT; | |
611 | ||
840f481c | 612 | while (count1 > 0) |
b3cfe0c8 RS |
613 | { |
614 | stop = ZV; | |
04882296 | 615 | do |
b3cfe0c8 | 616 | { |
04882296 KH |
617 | if (from == stop) |
618 | { | |
619 | SET_PT (from); | |
620 | return Qnil; | |
621 | } | |
b3cfe0c8 RS |
622 | c = FETCH_CHAR (from); |
623 | code = SYNTAX (c); | |
624 | from++; | |
625 | comstyle = 0; | |
626 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
627 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
628 | { | |
7fc8191e RS |
629 | /* We have encountered a comment start sequence and we |
630 | are ignoring all text inside comments. We must record | |
b3cfe0c8 RS |
631 | the comment style this sequence begins so that later, |
632 | only a comment end of the same style actually ends | |
7fc8191e | 633 | the comment section. */ |
b3cfe0c8 RS |
634 | code = Scomment; |
635 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
636 | from++; | |
637 | } | |
04882296 KH |
638 | } |
639 | while (code == Swhitespace || code == Sendcomment); | |
640 | if (code != Scomment) | |
641 | { | |
642 | immediate_quit = 0; | |
643 | SET_PT (from - 1); | |
644 | return Qnil; | |
645 | } | |
646 | /* We're at the start of a comment. */ | |
647 | while (1) | |
648 | { | |
649 | if (from == stop) | |
b3cfe0c8 RS |
650 | { |
651 | immediate_quit = 0; | |
04882296 | 652 | SET_PT (from); |
b3cfe0c8 RS |
653 | return Qnil; |
654 | } | |
04882296 KH |
655 | c = FETCH_CHAR (from); |
656 | if (SYNTAX (c) == Sendcomment | |
657 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
658 | /* we have encountered a comment end of the same style | |
659 | as the comment sequence which began this comment | |
660 | section */ | |
661 | break; | |
662 | from++; | |
663 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
664 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) | |
665 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
666 | /* we have encountered a comment end of the same style | |
667 | as the comment sequence which began this comment | |
668 | section */ | |
669 | { from++; break; } | |
b3cfe0c8 | 670 | } |
04882296 | 671 | /* We have skipped one comment. */ |
840f481c | 672 | count1--; |
b3cfe0c8 RS |
673 | } |
674 | ||
840f481c | 675 | while (count1 < 0) |
b3cfe0c8 RS |
676 | { |
677 | stop = BEGV; | |
678 | while (from > stop) | |
679 | { | |
680 | int quoted; | |
681 | ||
682 | from--; | |
683 | quoted = char_quoted (from); | |
684 | if (quoted) | |
685 | from--; | |
686 | c = FETCH_CHAR (from); | |
687 | code = SYNTAX (c); | |
688 | comstyle = 0; | |
7fc8191e RS |
689 | if (code == Sendcomment) |
690 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
b3cfe0c8 RS |
691 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
692 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
693 | && !char_quoted (from - 1)) | |
694 | { | |
7fc8191e | 695 | /* We must record the comment style encountered so that |
b3cfe0c8 | 696 | later, we can match only the proper comment begin |
7fc8191e | 697 | sequence of the same style. */ |
b3cfe0c8 RS |
698 | code = Sendcomment; |
699 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
700 | from--; | |
701 | } | |
702 | ||
703 | if (code == Sendcomment && !quoted) | |
704 | { | |
8f9dc2ed | 705 | #if 0 |
b3cfe0c8 RS |
706 | if (code != SYNTAX (c)) |
707 | /* For a two-char comment ender, we can assume | |
708 | it does end a comment. So scan back in a simple way. */ | |
709 | { | |
710 | if (from != stop) from--; | |
711 | while (1) | |
712 | { | |
713 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
714 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
715 | break; | |
716 | if (from == stop) | |
717 | { | |
718 | immediate_quit = 0; | |
c81a3712 | 719 | SET_PT (from); |
b3cfe0c8 RS |
720 | return Qnil; |
721 | } | |
722 | from--; | |
723 | if (SYNTAX_COMSTART_SECOND (c) | |
724 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
725 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
726 | && !char_quoted (from)) | |
727 | break; | |
728 | } | |
729 | break; | |
730 | } | |
8f9dc2ed | 731 | #endif /* 0 */ |
b3cfe0c8 RS |
732 | |
733 | /* Look back, counting the parity of string-quotes, | |
734 | and recording the comment-starters seen. | |
735 | When we reach a safe place, assume that's not in a string; | |
736 | then step the main scan to the earliest comment-starter seen | |
737 | an even number of string quotes away from the safe place. | |
738 | ||
739 | OFROM[I] is position of the earliest comment-starter seen | |
740 | which is I+2X quotes from the comment-end. | |
741 | PARITY is current parity of quotes from the comment end. */ | |
742 | { | |
743 | int parity = 0; | |
744 | char my_stringend = 0; | |
745 | int string_lossage = 0; | |
746 | int comment_end = from; | |
747 | int comstart_pos = 0; | |
748 | int comstart_parity = 0; | |
749 | ||
750 | /* At beginning of range to scan, we're outside of strings; | |
751 | that determines quote parity to the comment-end. */ | |
752 | while (from != stop) | |
753 | { | |
754 | /* Move back and examine a character. */ | |
755 | from--; | |
756 | ||
757 | c = FETCH_CHAR (from); | |
758 | code = SYNTAX (c); | |
759 | ||
760 | /* If this char is the second of a 2-char comment sequence, | |
761 | back up and give the pair the appropriate syntax. */ | |
762 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
763 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
764 | { | |
765 | code = Sendcomment; | |
766 | from--; | |
767 | } | |
768 | ||
769 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) | |
770 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
771 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
772 | { | |
773 | code = Scomment; | |
774 | from--; | |
775 | } | |
776 | ||
777 | /* Ignore escaped characters. */ | |
778 | if (char_quoted (from)) | |
779 | continue; | |
780 | ||
781 | /* Track parity of quotes. */ | |
782 | if (code == Sstring) | |
783 | { | |
784 | parity ^= 1; | |
785 | if (my_stringend == 0) | |
786 | my_stringend = c; | |
787 | /* If we have two kinds of string delimiters. | |
788 | There's no way to grok this scanning backwards. */ | |
789 | else if (my_stringend != c) | |
790 | string_lossage = 1; | |
791 | } | |
792 | ||
793 | /* Record comment-starters according to that | |
794 | quote-parity to the comment-end. */ | |
795 | if (code == Scomment) | |
796 | { | |
797 | comstart_parity = parity; | |
798 | comstart_pos = from; | |
799 | } | |
800 | ||
801 | /* If we find another earlier comment-ender, | |
eb8c3be9 | 802 | any comment-starts earlier than that don't count |
b3cfe0c8 RS |
803 | (because they go with the earlier comment-ender). */ |
804 | if (code == Sendcomment | |
805 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
806 | break; | |
807 | ||
808 | /* Assume a defun-start point is outside of strings. */ | |
809 | if (code == Sopen | |
810 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
811 | break; | |
812 | } | |
813 | ||
814 | if (comstart_pos == 0) | |
815 | from = comment_end; | |
816 | /* If the earliest comment starter | |
817 | is followed by uniform paired string quotes or none, | |
818 | we know it can't be inside a string | |
819 | since if it were then the comment ender would be inside one. | |
820 | So it does start a comment. Skip back to it. */ | |
821 | else if (comstart_parity == 0 && !string_lossage) | |
822 | from = comstart_pos; | |
823 | else | |
824 | { | |
825 | /* We had two kinds of string delimiters mixed up | |
826 | together. Decode this going forwards. | |
827 | Scan fwd from the previous comment ender | |
828 | to the one in question; this records where we | |
829 | last passed a comment starter. */ | |
830 | struct lisp_parse_state state; | |
831 | scan_sexps_forward (&state, find_defun_start (comment_end), | |
340f92b5 | 832 | comment_end - 1, -10000, 0, Qnil, 0); |
b3cfe0c8 RS |
833 | if (state.incomment) |
834 | from = state.comstart; | |
835 | else | |
836 | /* We can't grok this as a comment; scan it normally. */ | |
837 | from = comment_end; | |
838 | } | |
839 | } | |
7fc8191e RS |
840 | /* We have skipped one comment. */ |
841 | break; | |
b3cfe0c8 | 842 | } |
c81a3712 | 843 | else if ((code != Swhitespace && code != Scomment) || quoted) |
b3cfe0c8 RS |
844 | { |
845 | immediate_quit = 0; | |
c81a3712 | 846 | SET_PT (from + 1); |
b3cfe0c8 RS |
847 | return Qnil; |
848 | } | |
849 | } | |
850 | ||
840f481c | 851 | count1++; |
b3cfe0c8 RS |
852 | } |
853 | ||
854 | SET_PT (from); | |
855 | immediate_quit = 0; | |
856 | return Qt; | |
857 | } | |
858 | \f | |
8489eb67 RS |
859 | int parse_sexp_ignore_comments; |
860 | ||
861 | Lisp_Object | |
862 | scan_lists (from, count, depth, sexpflag) | |
863 | register int from; | |
864 | int count, depth, sexpflag; | |
865 | { | |
866 | Lisp_Object val; | |
867 | register int stop; | |
868 | register int c; | |
869 | char stringterm; | |
870 | int quoted; | |
871 | int mathexit = 0; | |
872 | register enum syntaxcode code; | |
873 | int min_depth = depth; /* Err out if depth gets less than this. */ | |
e5d4f4dc | 874 | int comstyle = 0; /* style of comment encountered */ |
8489eb67 RS |
875 | |
876 | if (depth > 0) min_depth = 0; | |
877 | ||
878 | immediate_quit = 1; | |
879 | QUIT; | |
880 | ||
881 | while (count > 0) | |
882 | { | |
883 | stop = ZV; | |
884 | while (from < stop) | |
885 | { | |
886 | c = FETCH_CHAR (from); | |
e5d4f4dc | 887 | code = SYNTAX (c); |
8489eb67 RS |
888 | from++; |
889 | if (from < stop && SYNTAX_COMSTART_FIRST (c) | |
890 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from)) | |
891 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
892 | { |
893 | /* we have encountered a comment start sequence and we | |
894 | are ignoring all text inside comments. we must record | |
895 | the comment style this sequence begins so that later, | |
896 | only a comment end of the same style actually ends | |
897 | the comment section */ | |
898 | code = Scomment; | |
899 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
900 | from++; | |
901 | } | |
902 | ||
8489eb67 RS |
903 | if (SYNTAX_PREFIX (c)) |
904 | continue; | |
905 | ||
906 | #ifdef SWITCH_ENUM_BUG | |
907 | switch ((int) code) | |
908 | #else | |
909 | switch (code) | |
910 | #endif | |
911 | { | |
912 | case Sescape: | |
913 | case Scharquote: | |
914 | if (from == stop) goto lose; | |
915 | from++; | |
916 | /* treat following character as a word constituent */ | |
917 | case Sword: | |
918 | case Ssymbol: | |
919 | if (depth || !sexpflag) break; | |
920 | /* This word counts as a sexp; return at end of it. */ | |
921 | while (from < stop) | |
922 | { | |
923 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 924 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 925 | #else |
e5d4f4dc | 926 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
927 | #endif |
928 | { | |
929 | case Scharquote: | |
930 | case Sescape: | |
931 | from++; | |
932 | if (from == stop) goto lose; | |
933 | break; | |
934 | case Sword: | |
935 | case Ssymbol: | |
936 | case Squote: | |
937 | break; | |
938 | default: | |
939 | goto done; | |
940 | } | |
941 | from++; | |
942 | } | |
943 | goto done; | |
944 | ||
945 | case Scomment: | |
946 | if (!parse_sexp_ignore_comments) break; | |
947 | while (1) | |
948 | { | |
c01f7ec0 RS |
949 | if (from == stop) |
950 | { | |
951 | if (depth == 0) | |
952 | goto done; | |
953 | goto lose; | |
954 | } | |
e5d4f4dc RS |
955 | c = FETCH_CHAR (from); |
956 | if (SYNTAX (c) == Sendcomment | |
957 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
958 | /* we have encountered a comment end of the same style | |
959 | as the comment sequence which began this comment | |
960 | section */ | |
8489eb67 RS |
961 | break; |
962 | from++; | |
963 | if (from < stop && SYNTAX_COMEND_FIRST (c) | |
e5d4f4dc RS |
964 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
965 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
966 | /* we have encountered a comment end of the same style | |
967 | as the comment sequence which began this comment | |
968 | section */ | |
8489eb67 RS |
969 | { from++; break; } |
970 | } | |
971 | break; | |
972 | ||
973 | case Smath: | |
974 | if (!sexpflag) | |
975 | break; | |
976 | if (from != stop && c == FETCH_CHAR (from)) | |
977 | from++; | |
978 | if (mathexit) | |
979 | { | |
980 | mathexit = 0; | |
981 | goto close1; | |
982 | } | |
983 | mathexit = 1; | |
984 | ||
985 | case Sopen: | |
986 | if (!++depth) goto done; | |
987 | break; | |
988 | ||
989 | case Sclose: | |
990 | close1: | |
991 | if (!--depth) goto done; | |
992 | if (depth < min_depth) | |
993 | error ("Containing expression ends prematurely"); | |
994 | break; | |
995 | ||
996 | case Sstring: | |
997 | stringterm = FETCH_CHAR (from - 1); | |
998 | while (1) | |
999 | { | |
1000 | if (from >= stop) goto lose; | |
1001 | if (FETCH_CHAR (from) == stringterm) break; | |
1002 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1003 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1004 | #else |
e5d4f4dc | 1005 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1006 | #endif |
1007 | { | |
1008 | case Scharquote: | |
1009 | case Sescape: | |
1010 | from++; | |
1011 | } | |
1012 | from++; | |
1013 | } | |
1014 | from++; | |
1015 | if (!depth && sexpflag) goto done; | |
1016 | break; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | /* Reached end of buffer. Error if within object, return nil if between */ | |
1021 | if (depth) goto lose; | |
1022 | ||
1023 | immediate_quit = 0; | |
1024 | return Qnil; | |
1025 | ||
1026 | /* End of object reached */ | |
1027 | done: | |
1028 | count--; | |
1029 | } | |
1030 | ||
1031 | while (count < 0) | |
1032 | { | |
1033 | stop = BEGV; | |
1034 | while (from > stop) | |
1035 | { | |
1036 | from--; | |
1037 | if (quoted = char_quoted (from)) | |
1038 | from--; | |
1039 | c = FETCH_CHAR (from); | |
1040 | code = SYNTAX (c); | |
7fc8191e RS |
1041 | comstyle = 0; |
1042 | if (code == Sendcomment) | |
1043 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 RS |
1044 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1045 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1)) | |
1046 | && !char_quoted (from - 1) | |
1047 | && parse_sexp_ignore_comments) | |
e5d4f4dc RS |
1048 | { |
1049 | /* we must record the comment style encountered so that | |
1050 | later, we can match only the proper comment begin | |
1051 | sequence of the same style */ | |
1052 | code = Sendcomment; | |
1053 | comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from - 1)); | |
1054 | from--; | |
1055 | } | |
1056 | ||
8489eb67 RS |
1057 | if (SYNTAX_PREFIX (c)) |
1058 | continue; | |
1059 | ||
1060 | #ifdef SWITCH_ENUM_BUG | |
1061 | switch ((int) (quoted ? Sword : code)) | |
1062 | #else | |
1063 | switch (quoted ? Sword : code) | |
1064 | #endif | |
1065 | { | |
1066 | case Sword: | |
1067 | case Ssymbol: | |
1068 | if (depth || !sexpflag) break; | |
1069 | /* This word counts as a sexp; count object finished after passing it. */ | |
1070 | while (from > stop) | |
1071 | { | |
1072 | quoted = char_quoted (from - 1); | |
1073 | if (quoted) | |
1074 | from--; | |
e5d4f4dc RS |
1075 | if (! (quoted || SYNTAX (FETCH_CHAR (from - 1)) == Sword |
1076 | || SYNTAX (FETCH_CHAR (from - 1)) == Ssymbol | |
1077 | || SYNTAX (FETCH_CHAR (from - 1)) == Squote)) | |
8489eb67 RS |
1078 | goto done2; |
1079 | from--; | |
1080 | } | |
1081 | goto done2; | |
1082 | ||
1083 | case Smath: | |
1084 | if (!sexpflag) | |
1085 | break; | |
1086 | if (from != stop && c == FETCH_CHAR (from - 1)) | |
1087 | from--; | |
1088 | if (mathexit) | |
1089 | { | |
1090 | mathexit = 0; | |
1091 | goto open2; | |
1092 | } | |
1093 | mathexit = 1; | |
1094 | ||
1095 | case Sclose: | |
1096 | if (!++depth) goto done2; | |
1097 | break; | |
1098 | ||
1099 | case Sopen: | |
1100 | open2: | |
1101 | if (!--depth) goto done2; | |
1102 | if (depth < min_depth) | |
1103 | error ("Containing expression ends prematurely"); | |
1104 | break; | |
1105 | ||
1106 | case Sendcomment: | |
1107 | if (!parse_sexp_ignore_comments) | |
1108 | break; | |
8f9dc2ed | 1109 | #if 0 |
37bef230 RS |
1110 | if (code != SYNTAX (c)) |
1111 | /* For a two-char comment ender, we can assume | |
1112 | it does end a comment. So scan back in a simple way. */ | |
1113 | { | |
1114 | if (from != stop) from--; | |
1115 | while (1) | |
1116 | { | |
1117 | if (SYNTAX (c = FETCH_CHAR (from)) == Scomment | |
1118 | && SYNTAX_COMMENT_STYLE (c) == comstyle) | |
1119 | break; | |
c01f7ec0 RS |
1120 | if (from == stop) |
1121 | { | |
1122 | if (depth == 0) | |
1123 | goto done2; | |
1124 | goto lose; | |
1125 | } | |
37bef230 RS |
1126 | from--; |
1127 | if (SYNTAX_COMSTART_SECOND (c) | |
1128 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from)) | |
1129 | && SYNTAX_COMMENT_STYLE (c) == comstyle | |
1130 | && !char_quoted (from)) | |
1131 | break; | |
1132 | } | |
1133 | break; | |
1134 | } | |
8f9dc2ed | 1135 | #endif /* 0 */ |
37bef230 | 1136 | |
8489eb67 RS |
1137 | /* Look back, counting the parity of string-quotes, |
1138 | and recording the comment-starters seen. | |
1139 | When we reach a safe place, assume that's not in a string; | |
1140 | then step the main scan to the earliest comment-starter seen | |
1141 | an even number of string quotes away from the safe place. | |
1142 | ||
1143 | OFROM[I] is position of the earliest comment-starter seen | |
1144 | which is I+2X quotes from the comment-end. | |
1145 | PARITY is current parity of quotes from the comment end. */ | |
1146 | { | |
8489eb67 | 1147 | int parity = 0; |
e5d4f4dc RS |
1148 | char my_stringend = 0; |
1149 | int string_lossage = 0; | |
1150 | int comment_end = from; | |
37bef230 RS |
1151 | int comstart_pos = 0; |
1152 | int comstart_parity = 0; | |
8489eb67 RS |
1153 | |
1154 | /* At beginning of range to scan, we're outside of strings; | |
1155 | that determines quote parity to the comment-end. */ | |
1156 | while (from != stop) | |
1157 | { | |
1158 | /* Move back and examine a character. */ | |
1159 | from--; | |
1160 | ||
1161 | c = FETCH_CHAR (from); | |
1162 | code = SYNTAX (c); | |
1163 | ||
1164 | /* If this char is the second of a 2-char comment sequence, | |
1165 | back up and give the pair the appropriate syntax. */ | |
1166 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
1167 | && SYNTAX_COMEND_FIRST (FETCH_CHAR (from - 1))) | |
e5d4f4dc RS |
1168 | { |
1169 | code = Sendcomment; | |
1170 | from--; | |
1171 | } | |
1172 | ||
8489eb67 | 1173 | else if (from > stop && SYNTAX_COMSTART_SECOND (c) |
e5d4f4dc RS |
1174 | && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) |
1175 | && comstyle == SYNTAX_COMMENT_STYLE (c)) | |
1176 | { | |
1177 | code = Scomment; | |
1178 | from--; | |
1179 | } | |
8489eb67 RS |
1180 | |
1181 | /* Ignore escaped characters. */ | |
1182 | if (char_quoted (from)) | |
1183 | continue; | |
1184 | ||
37bef230 | 1185 | /* Track parity of quotes. */ |
8489eb67 | 1186 | if (code == Sstring) |
e5d4f4dc RS |
1187 | { |
1188 | parity ^= 1; | |
1189 | if (my_stringend == 0) | |
1190 | my_stringend = c; | |
37bef230 | 1191 | /* If we have two kinds of string delimiters. |
e5d4f4dc RS |
1192 | There's no way to grok this scanning backwards. */ |
1193 | else if (my_stringend != c) | |
1194 | string_lossage = 1; | |
1195 | } | |
8489eb67 RS |
1196 | |
1197 | /* Record comment-starters according to that | |
1198 | quote-parity to the comment-end. */ | |
1199 | if (code == Scomment) | |
37bef230 RS |
1200 | { |
1201 | comstart_parity = parity; | |
1202 | comstart_pos = from; | |
1203 | } | |
8489eb67 | 1204 | |
37bef230 | 1205 | /* If we find another earlier comment-ender, |
eb8c3be9 | 1206 | any comment-starts earlier than that don't count |
37bef230 | 1207 | (because they go with the earlier comment-ender). */ |
e5d4f4dc RS |
1208 | if (code == Sendcomment |
1209 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)) == comstyle) | |
8489eb67 | 1210 | break; |
37bef230 RS |
1211 | |
1212 | /* Assume a defun-start point is outside of strings. */ | |
1213 | if (code == Sopen | |
1214 | && (from == stop || FETCH_CHAR (from - 1) == '\n')) | |
1215 | break; | |
8489eb67 | 1216 | } |
37bef230 RS |
1217 | |
1218 | if (comstart_pos == 0) | |
1219 | from = comment_end; | |
1220 | /* If the earliest comment starter | |
1221 | is followed by uniform paired string quotes or none, | |
1222 | we know it can't be inside a string | |
1223 | since if it were then the comment ender would be inside one. | |
1224 | So it does start a comment. Skip back to it. */ | |
1225 | else if (comstart_parity == 0 && !string_lossage) | |
1226 | from = comstart_pos; | |
1227 | else | |
e5d4f4dc RS |
1228 | { |
1229 | /* We had two kinds of string delimiters mixed up | |
1230 | together. Decode this going forwards. | |
1231 | Scan fwd from the previous comment ender | |
1232 | to the one in question; this records where we | |
1233 | last passed a comment starter. */ | |
1234 | struct lisp_parse_state state; | |
37bef230 | 1235 | scan_sexps_forward (&state, find_defun_start (comment_end), |
340f92b5 | 1236 | comment_end - 1, -10000, 0, Qnil, 0); |
e5d4f4dc RS |
1237 | if (state.incomment) |
1238 | from = state.comstart; | |
1239 | else | |
1240 | /* We can't grok this as a comment; scan it normally. */ | |
1241 | from = comment_end; | |
1242 | } | |
8489eb67 RS |
1243 | } |
1244 | break; | |
1245 | ||
1246 | case Sstring: | |
1247 | stringterm = FETCH_CHAR (from); | |
1248 | while (1) | |
1249 | { | |
1250 | if (from == stop) goto lose; | |
1251 | if (!char_quoted (from - 1) | |
1252 | && stringterm == FETCH_CHAR (from - 1)) | |
1253 | break; | |
1254 | from--; | |
1255 | } | |
1256 | from--; | |
1257 | if (!depth && sexpflag) goto done2; | |
1258 | break; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | /* Reached start of buffer. Error if within object, return nil if between */ | |
1263 | if (depth) goto lose; | |
1264 | ||
1265 | immediate_quit = 0; | |
1266 | return Qnil; | |
1267 | ||
1268 | done2: | |
1269 | count++; | |
1270 | } | |
1271 | ||
1272 | ||
1273 | immediate_quit = 0; | |
1274 | XFASTINT (val) = from; | |
1275 | return val; | |
1276 | ||
1277 | lose: | |
1278 | error ("Unbalanced parentheses"); | |
1279 | /* NOTREACHED */ | |
1280 | } | |
1281 | ||
340f92b5 | 1282 | static int |
8489eb67 RS |
1283 | char_quoted (pos) |
1284 | register int pos; | |
1285 | { | |
1286 | register enum syntaxcode code; | |
1287 | register int beg = BEGV; | |
1288 | register int quoted = 0; | |
1289 | ||
1290 | while (pos > beg | |
1291 | && ((code = SYNTAX (FETCH_CHAR (pos - 1))) == Scharquote | |
1292 | || code == Sescape)) | |
1293 | pos--, quoted = !quoted; | |
1294 | return quoted; | |
1295 | } | |
1296 | ||
1297 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, | |
1298 | "Scan from character number FROM by COUNT lists.\n\ | |
1299 | Returns the character number of the position thus found.\n\ | |
1300 | \n\ | |
1301 | If DEPTH is nonzero, paren depth begins counting from that value,\n\ | |
1302 | only places where the depth in parentheses becomes zero\n\ | |
1303 | are candidates for stopping; COUNT such places are counted.\n\ | |
1304 | Thus, a positive value for DEPTH means go out levels.\n\ | |
1305 | \n\ | |
1306 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
1307 | \n\ | |
1308 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
1309 | and the depth is wrong, an error is signaled.\n\ | |
1310 | If the depth is right but the count is not used up, nil is returned.") | |
1311 | (from, count, depth) | |
1312 | Lisp_Object from, count, depth; | |
1313 | { | |
1314 | CHECK_NUMBER (from, 0); | |
1315 | CHECK_NUMBER (count, 1); | |
1316 | CHECK_NUMBER (depth, 2); | |
1317 | ||
1318 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
1319 | } | |
1320 | ||
1321 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
1322 | "Scan from character number FROM by COUNT balanced expressions.\n\ | |
1323 | If COUNT is negative, scan backwards.\n\ | |
1324 | Returns the character number of the position thus found.\n\ | |
1325 | \n\ | |
1326 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
1327 | \n\ | |
1328 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
1329 | in the middle of a parenthetical grouping, an error is signaled.\n\ | |
1330 | If the beginning or end is reached between groupings\n\ | |
1331 | but before count is used up, nil is returned.") | |
1332 | (from, count) | |
1333 | Lisp_Object from, count; | |
1334 | { | |
1335 | CHECK_NUMBER (from, 0); | |
1336 | CHECK_NUMBER (count, 1); | |
1337 | ||
1338 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
1339 | } | |
1340 | ||
1341 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
1342 | 0, 0, 0, | |
1343 | "Move point backward over any number of chars with prefix syntax.\n\ | |
1344 | This includes chars with \"quote\" or \"prefix\" syntax (' or p).") | |
1345 | () | |
1346 | { | |
1347 | int beg = BEGV; | |
1348 | int pos = point; | |
1349 | ||
1350 | while (pos > beg && !char_quoted (pos - 1) | |
1351 | && (SYNTAX (FETCH_CHAR (pos - 1)) == Squote | |
1352 | || SYNTAX_PREFIX (FETCH_CHAR (pos - 1)))) | |
1353 | pos--; | |
1354 | ||
1355 | SET_PT (pos); | |
1356 | ||
1357 | return Qnil; | |
1358 | } | |
1359 | \f | |
8489eb67 | 1360 | /* Parse forward from FROM to END, |
e5d4f4dc RS |
1361 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
1362 | and return a description of the state of the parse at END. | |
c81a3712 RS |
1363 | If STOPBEFORE is nonzero, stop at the start of an atom. |
1364 | If COMMENTSTOP is nonzero, stop at the start of a comment. */ | |
8489eb67 | 1365 | |
340f92b5 | 1366 | static void |
c81a3712 RS |
1367 | scan_sexps_forward (stateptr, from, end, targetdepth, |
1368 | stopbefore, oldstate, commentstop) | |
e5d4f4dc | 1369 | struct lisp_parse_state *stateptr; |
8489eb67 RS |
1370 | register int from; |
1371 | int end, targetdepth, stopbefore; | |
1372 | Lisp_Object oldstate; | |
c81a3712 | 1373 | int commentstop; |
8489eb67 RS |
1374 | { |
1375 | struct lisp_parse_state state; | |
1376 | ||
1377 | register enum syntaxcode code; | |
1378 | struct level { int last, prev; }; | |
1379 | struct level levelstart[100]; | |
1380 | register struct level *curlevel = levelstart; | |
1381 | struct level *endlevel = levelstart + 100; | |
1382 | char prev; | |
1383 | register int depth; /* Paren depth of current scanning location. | |
1384 | level - levelstart equals this except | |
1385 | when the depth becomes negative. */ | |
1386 | int mindepth; /* Lowest DEPTH value seen. */ | |
1387 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
1388 | Lisp_Object tem; | |
1389 | ||
1390 | immediate_quit = 1; | |
1391 | QUIT; | |
1392 | ||
265a9e55 | 1393 | if (NILP (oldstate)) |
8489eb67 RS |
1394 | { |
1395 | depth = 0; | |
1396 | state.instring = -1; | |
1397 | state.incomment = 0; | |
e5d4f4dc | 1398 | state.comstyle = 0; /* comment style a by default */ |
8489eb67 RS |
1399 | } |
1400 | else | |
1401 | { | |
1402 | tem = Fcar (oldstate); | |
265a9e55 | 1403 | if (!NILP (tem)) |
8489eb67 RS |
1404 | depth = XINT (tem); |
1405 | else | |
1406 | depth = 0; | |
1407 | ||
1408 | oldstate = Fcdr (oldstate); | |
1409 | oldstate = Fcdr (oldstate); | |
1410 | oldstate = Fcdr (oldstate); | |
1411 | tem = Fcar (oldstate); | |
265a9e55 | 1412 | state.instring = !NILP (tem) ? XINT (tem) : -1; |
8489eb67 RS |
1413 | |
1414 | oldstate = Fcdr (oldstate); | |
1415 | tem = Fcar (oldstate); | |
265a9e55 | 1416 | state.incomment = !NILP (tem); |
8489eb67 RS |
1417 | |
1418 | oldstate = Fcdr (oldstate); | |
1419 | tem = Fcar (oldstate); | |
265a9e55 | 1420 | start_quoted = !NILP (tem); |
e5d4f4dc RS |
1421 | |
1422 | /* if the eight element of the list is nil, we are in comment | |
1423 | style a. if it is non-nil, we are in comment style b */ | |
1424 | oldstate = Fcdr (oldstate); | |
1425 | oldstate = Fcdr (oldstate); | |
e5d4f4dc RS |
1426 | tem = Fcar (oldstate); |
1427 | state.comstyle = !NILP (tem); | |
8489eb67 RS |
1428 | } |
1429 | state.quoted = 0; | |
1430 | mindepth = depth; | |
1431 | ||
1432 | curlevel->prev = -1; | |
1433 | curlevel->last = -1; | |
1434 | ||
1435 | /* Enter the loop at a place appropriate for initial state. */ | |
1436 | ||
1437 | if (state.incomment) goto startincomment; | |
1438 | if (state.instring >= 0) | |
1439 | { | |
1440 | if (start_quoted) goto startquotedinstring; | |
1441 | goto startinstring; | |
1442 | } | |
1443 | if (start_quoted) goto startquoted; | |
1444 | ||
1445 | while (from < end) | |
1446 | { | |
e5d4f4dc | 1447 | code = SYNTAX (FETCH_CHAR (from)); |
8489eb67 | 1448 | from++; |
8f9dc2ed RS |
1449 | if (code == Scomment) |
1450 | state.comstart = from-1; | |
1451 | ||
1452 | else if (from < end && SYNTAX_COMSTART_FIRST (FETCH_CHAR (from - 1)) | |
1453 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from))) | |
e5d4f4dc RS |
1454 | { |
1455 | /* Record the comment style we have entered so that only | |
1456 | the comment-end sequence of the same style actually | |
1457 | terminates the comment section. */ | |
1458 | code = Scomment; | |
1459 | state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from)); | |
8f9dc2ed | 1460 | state.comstart = from-1; |
e5d4f4dc RS |
1461 | from++; |
1462 | } | |
1463 | ||
8489eb67 RS |
1464 | if (SYNTAX_PREFIX (FETCH_CHAR (from - 1))) |
1465 | continue; | |
1466 | #ifdef SWITCH_ENUM_BUG | |
1467 | switch ((int) code) | |
1468 | #else | |
1469 | switch (code) | |
1470 | #endif | |
1471 | { | |
1472 | case Sescape: | |
1473 | case Scharquote: | |
1474 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1475 | curlevel->last = from - 1; | |
1476 | startquoted: | |
1477 | if (from == end) goto endquoted; | |
1478 | from++; | |
1479 | goto symstarted; | |
1480 | /* treat following character as a word constituent */ | |
1481 | case Sword: | |
1482 | case Ssymbol: | |
1483 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1484 | curlevel->last = from - 1; | |
1485 | symstarted: | |
1486 | while (from < end) | |
1487 | { | |
1488 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1489 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1490 | #else |
e5d4f4dc | 1491 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1492 | #endif |
1493 | { | |
1494 | case Scharquote: | |
1495 | case Sescape: | |
1496 | from++; | |
1497 | if (from == end) goto endquoted; | |
1498 | break; | |
1499 | case Sword: | |
1500 | case Ssymbol: | |
1501 | case Squote: | |
1502 | break; | |
1503 | default: | |
1504 | goto symdone; | |
1505 | } | |
1506 | from++; | |
1507 | } | |
1508 | symdone: | |
1509 | curlevel->prev = curlevel->last; | |
1510 | break; | |
1511 | ||
1512 | case Scomment: | |
1513 | state.incomment = 1; | |
1514 | startincomment: | |
c81a3712 RS |
1515 | if (commentstop) |
1516 | goto done; | |
8489eb67 RS |
1517 | while (1) |
1518 | { | |
1519 | if (from == end) goto done; | |
e5d4f4dc RS |
1520 | prev = FETCH_CHAR (from); |
1521 | if (SYNTAX (prev) == Sendcomment | |
1522 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1523 | /* Only terminate the comment section if the endcomment | |
1524 | of the same style as the start sequence has been | |
1525 | encountered. */ | |
8489eb67 RS |
1526 | break; |
1527 | from++; | |
1528 | if (from < end && SYNTAX_COMEND_FIRST (prev) | |
e5d4f4dc RS |
1529 | && SYNTAX_COMEND_SECOND (FETCH_CHAR (from)) |
1530 | && SYNTAX_COMMENT_STYLE (prev) == state.comstyle) | |
1531 | /* Only terminate the comment section if the end-comment | |
1532 | sequence of the same style as the start sequence has | |
1533 | been encountered. */ | |
8489eb67 RS |
1534 | { from++; break; } |
1535 | } | |
1536 | state.incomment = 0; | |
e5d4f4dc | 1537 | state.comstyle = 0; /* reset the comment style */ |
8489eb67 RS |
1538 | break; |
1539 | ||
1540 | case Sopen: | |
1541 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1542 | depth++; | |
1543 | /* curlevel++->last ran into compiler bug on Apollo */ | |
1544 | curlevel->last = from - 1; | |
1545 | if (++curlevel == endlevel) | |
1546 | error ("Nesting too deep for parser"); | |
1547 | curlevel->prev = -1; | |
1548 | curlevel->last = -1; | |
1549 | if (!--targetdepth) goto done; | |
1550 | break; | |
1551 | ||
1552 | case Sclose: | |
1553 | depth--; | |
1554 | if (depth < mindepth) | |
1555 | mindepth = depth; | |
1556 | if (curlevel != levelstart) | |
1557 | curlevel--; | |
1558 | curlevel->prev = curlevel->last; | |
1559 | if (!++targetdepth) goto done; | |
1560 | break; | |
1561 | ||
1562 | case Sstring: | |
1563 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
1564 | curlevel->last = from - 1; | |
1565 | state.instring = FETCH_CHAR (from - 1); | |
1566 | startinstring: | |
1567 | while (1) | |
1568 | { | |
1569 | if (from >= end) goto done; | |
1570 | if (FETCH_CHAR (from) == state.instring) break; | |
1571 | #ifdef SWITCH_ENUM_BUG | |
e5d4f4dc | 1572 | switch ((int) SYNTAX (FETCH_CHAR (from))) |
8489eb67 | 1573 | #else |
e5d4f4dc | 1574 | switch (SYNTAX (FETCH_CHAR (from))) |
8489eb67 RS |
1575 | #endif |
1576 | { | |
1577 | case Scharquote: | |
1578 | case Sescape: | |
1579 | from++; | |
1580 | startquotedinstring: | |
1581 | if (from >= end) goto endquoted; | |
1582 | } | |
1583 | from++; | |
1584 | } | |
1585 | state.instring = -1; | |
1586 | curlevel->prev = curlevel->last; | |
1587 | from++; | |
1588 | break; | |
1589 | ||
1590 | case Smath: | |
1591 | break; | |
1592 | } | |
1593 | } | |
1594 | goto done; | |
1595 | ||
1596 | stop: /* Here if stopping before start of sexp. */ | |
1597 | from--; /* We have just fetched the char that starts it; */ | |
1598 | goto done; /* but return the position before it. */ | |
1599 | ||
1600 | endquoted: | |
1601 | state.quoted = 1; | |
1602 | done: | |
1603 | state.depth = depth; | |
1604 | state.mindepth = mindepth; | |
1605 | state.thislevelstart = curlevel->prev; | |
1606 | state.prevlevelstart | |
1607 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
1608 | state.location = from; | |
1609 | immediate_quit = 0; | |
1610 | ||
e5d4f4dc | 1611 | *stateptr = state; |
8489eb67 RS |
1612 | } |
1613 | ||
1614 | /* This comment supplies the doc string for parse-partial-sexp, | |
1615 | for make-docfile to see. We cannot put this in the real DEFUN | |
1616 | due to limits in the Unix cpp. | |
1617 | ||
c81a3712 | 1618 | DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0, |
8489eb67 RS |
1619 | "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\ |
1620 | Parsing stops at TO or when certain criteria are met;\n\ | |
1621 | point is set to where parsing stops.\n\ | |
1622 | If fifth arg STATE is omitted or nil,\n\ | |
1623 | parsing assumes that FROM is the beginning of a function.\n\ | |
e5d4f4dc | 1624 | Value is a list of eight elements describing final state of parsing:\n\ |
af50f9e5 RS |
1625 | 0. depth in parens.\n\ |
1626 | 1. character address of start of innermost containing list; nil if none.\n\ | |
1627 | 2. character address of start of last complete sexp terminated.\n\ | |
1628 | 3. non-nil if inside a string.\n\ | |
8489eb67 | 1629 | (it is the character that will terminate the string.)\n\ |
af50f9e5 RS |
1630 | 4. t if inside a comment.\n\ |
1631 | 5. t if following a quote character.\n\ | |
1632 | 6. the minimum paren-depth encountered during this scan.\n\ | |
1633 | 7. t if in a comment of style `b'.\n\ | |
8489eb67 RS |
1634 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\ |
1635 | in parentheses becomes equal to TARGETDEPTH.\n\ | |
1636 | Fourth arg STOPBEFORE non-nil means stop when come to\n\ | |
1637 | any character that starts a sexp.\n\ | |
ec11639d | 1638 | Fifth arg STATE is an eight-list like what this function returns.\n\ |
a4275ad1 | 1639 | It is used to initialize the state of the parse. Its second and third |
c81a3712 RS |
1640 | elements are ignored. |
1641 | Sixth args COMMENTSTOP non-nil means stop at the start of a comment.") | |
1642 | (from, to, targetdepth, stopbefore, state, commentstop) | |
8489eb67 RS |
1643 | */ |
1644 | ||
c81a3712 | 1645 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
8489eb67 | 1646 | 0 /* See immediately above */) |
c81a3712 RS |
1647 | (from, to, targetdepth, stopbefore, oldstate, commentstop) |
1648 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; | |
8489eb67 RS |
1649 | { |
1650 | struct lisp_parse_state state; | |
1651 | int target; | |
1652 | ||
265a9e55 | 1653 | if (!NILP (targetdepth)) |
8489eb67 RS |
1654 | { |
1655 | CHECK_NUMBER (targetdepth, 3); | |
1656 | target = XINT (targetdepth); | |
1657 | } | |
1658 | else | |
1659 | target = -100000; /* We won't reach this depth */ | |
1660 | ||
1661 | validate_region (&from, &to); | |
e5d4f4dc | 1662 | scan_sexps_forward (&state, XINT (from), XINT (to), |
c81a3712 RS |
1663 | target, !NILP (stopbefore), oldstate, |
1664 | !NILP (commentstop)); | |
8489eb67 RS |
1665 | |
1666 | SET_PT (state.location); | |
1667 | ||
1668 | return Fcons (make_number (state.depth), | |
1669 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
1670 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
1671 | Fcons (state.instring >= 0 ? make_number (state.instring) : Qnil, | |
1672 | Fcons (state.incomment ? Qt : Qnil, | |
1673 | Fcons (state.quoted ? Qt : Qnil, | |
e5d4f4dc RS |
1674 | Fcons (make_number (state.mindepth), |
1675 | Fcons (state.comstyle ? Qt : Qnil, | |
1676 | Qnil)))))))); | |
8489eb67 RS |
1677 | } |
1678 | \f | |
1679 | init_syntax_once () | |
1680 | { | |
1681 | register int i; | |
1682 | register struct Lisp_Vector *v; | |
1683 | ||
1684 | /* Set this now, so first buffer creation can refer to it. */ | |
1685 | /* Make it nil before calling copy-syntax-table | |
1686 | so that copy-syntax-table will know not to try to copy from garbage */ | |
1687 | Vstandard_syntax_table = Qnil; | |
1688 | Vstandard_syntax_table = Fcopy_syntax_table (Qnil); | |
1689 | ||
1690 | v = XVECTOR (Vstandard_syntax_table); | |
1691 | ||
1692 | for (i = 'a'; i <= 'z'; i++) | |
1693 | XFASTINT (v->contents[i]) = (int) Sword; | |
1694 | for (i = 'A'; i <= 'Z'; i++) | |
1695 | XFASTINT (v->contents[i]) = (int) Sword; | |
1696 | for (i = '0'; i <= '9'; i++) | |
1697 | XFASTINT (v->contents[i]) = (int) Sword; | |
1698 | XFASTINT (v->contents['$']) = (int) Sword; | |
1699 | XFASTINT (v->contents['%']) = (int) Sword; | |
1700 | ||
1701 | XFASTINT (v->contents['(']) = (int) Sopen + (')' << 8); | |
1702 | XFASTINT (v->contents[')']) = (int) Sclose + ('(' << 8); | |
1703 | XFASTINT (v->contents['[']) = (int) Sopen + (']' << 8); | |
1704 | XFASTINT (v->contents[']']) = (int) Sclose + ('[' << 8); | |
1705 | XFASTINT (v->contents['{']) = (int) Sopen + ('}' << 8); | |
1706 | XFASTINT (v->contents['}']) = (int) Sclose + ('{' << 8); | |
1707 | XFASTINT (v->contents['"']) = (int) Sstring; | |
1708 | XFASTINT (v->contents['\\']) = (int) Sescape; | |
1709 | ||
1710 | for (i = 0; i < 10; i++) | |
1711 | XFASTINT (v->contents["_-+*/&|<>="[i]]) = (int) Ssymbol; | |
1712 | ||
1713 | for (i = 0; i < 12; i++) | |
1714 | XFASTINT (v->contents[".,;:?!#@~^'`"[i]]) = (int) Spunct; | |
1715 | } | |
1716 | ||
1717 | syms_of_syntax () | |
1718 | { | |
1719 | Qsyntax_table_p = intern ("syntax-table-p"); | |
1720 | staticpro (&Qsyntax_table_p); | |
1721 | ||
1722 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, | |
1723 | "Non-nil means `forward-sexp', etc., should treat comments as whitespace."); | |
1724 | ||
1725 | words_include_escapes = 0; | |
1726 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
1727 | "Non-nil means `forward-word', etc., should treat escape chars part of words."); | |
1728 | ||
1729 | defsubr (&Ssyntax_table_p); | |
1730 | defsubr (&Ssyntax_table); | |
1731 | defsubr (&Sstandard_syntax_table); | |
1732 | defsubr (&Scopy_syntax_table); | |
1733 | defsubr (&Sset_syntax_table); | |
1734 | defsubr (&Schar_syntax); | |
beefa22e | 1735 | defsubr (&Smatching_paren); |
8489eb67 RS |
1736 | defsubr (&Smodify_syntax_entry); |
1737 | defsubr (&Sdescribe_syntax); | |
1738 | ||
1739 | defsubr (&Sforward_word); | |
1740 | ||
b3cfe0c8 | 1741 | defsubr (&Sforward_comment); |
8489eb67 RS |
1742 | defsubr (&Sscan_lists); |
1743 | defsubr (&Sscan_sexps); | |
1744 | defsubr (&Sbackward_prefix_chars); | |
1745 | defsubr (&Sparse_partial_sexp); | |
1746 | } |