Commit | Line | Data |
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8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
b8855607 | 2 | Copyright (C) 1985, 87, 93, 94, 95, 97, 1998, 1999 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 | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
8489eb67 RS |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
8489eb67 RS |
23 | #include <ctype.h> |
24 | #include "lisp.h" | |
25 | #include "commands.h" | |
26 | #include "buffer.h" | |
93da5fff | 27 | #include "charset.h" |
195d1361 RS |
28 | |
29 | /* Make syntax table lookup grant data in gl_state. */ | |
30 | #define SYNTAX_ENTRY_VIA_PROPERTY | |
31 | ||
8489eb67 | 32 | #include "syntax.h" |
195d1361 RS |
33 | #include "intervals.h" |
34 | ||
35 | /* We use these constants in place for comment-style and | |
36 | string-ender-char to distinguish comments/strings started by | |
37 | comment_fence and string_fence codes. */ | |
38 | ||
39 | #define ST_COMMENT_STYLE (256 + 1) | |
40 | #define ST_STRING_STYLE (256 + 2) | |
93da5fff | 41 | #include "category.h" |
8489eb67 | 42 | |
7bf5e9e4 | 43 | Lisp_Object Qsyntax_table_p, Qsyntax_table, Qscan_error; |
8489eb67 RS |
44 | |
45 | int words_include_escapes; | |
195d1361 | 46 | int parse_sexp_lookup_properties; |
8489eb67 | 47 | |
8ea151b2 RS |
48 | /* Used as a temporary in SYNTAX_ENTRY and other macros in syntax.h, |
49 | if not compiled with GCC. No need to mark it, since it is used | |
50 | only very temporarily. */ | |
51 | Lisp_Object syntax_temp; | |
52 | ||
e5d4f4dc RS |
53 | /* This is the internal form of the parse state used in parse-partial-sexp. */ |
54 | ||
55 | struct lisp_parse_state | |
56 | { | |
195d1361 RS |
57 | int depth; /* Depth at end of parsing. */ |
58 | int instring; /* -1 if not within string, else desired terminator. */ | |
95ff8dfc | 59 | int incomment; /* -1 if in unnestable comment else comment nesting */ |
195d1361 | 60 | int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */ |
e5d4f4dc RS |
61 | int quoted; /* Nonzero if just after an escape char at end of parsing */ |
62 | int thislevelstart; /* Char number of most recent start-of-expression at current level */ | |
63 | int prevlevelstart; /* Char number of start of containing expression */ | |
195d1361 | 64 | int location; /* Char number at which parsing stopped. */ |
e5d4f4dc | 65 | int mindepth; /* Minimum depth seen while scanning. */ |
195d1361 | 66 | int comstr_start; /* Position just after last comment/string starter. */ |
1a102a58 RS |
67 | Lisp_Object levelstarts; /* Char numbers of starts-of-expression |
68 | of levels (starting from outermost). */ | |
e5d4f4dc RS |
69 | }; |
70 | \f | |
37bef230 RS |
71 | /* These variables are a cache for finding the start of a defun. |
72 | find_start_pos is the place for which the defun start was found. | |
73 | find_start_value is the defun start position found for it. | |
6a140a74 | 74 | find_start_value_byte is the corresponding byte position. |
37bef230 RS |
75 | find_start_buffer is the buffer it was found in. |
76 | find_start_begv is the BEGV value when it was found. | |
77 | find_start_modiff is the value of MODIFF when it was found. */ | |
78 | ||
79 | static int find_start_pos; | |
80 | static int find_start_value; | |
6a140a74 | 81 | static int find_start_value_byte; |
37bef230 RS |
82 | static struct buffer *find_start_buffer; |
83 | static int find_start_begv; | |
84 | static int find_start_modiff; | |
6a140a74 RS |
85 | |
86 | ||
87 | static int find_defun_start P_ ((int, int)); | |
95ff8dfc | 88 | static int back_comment P_ ((int, int, int, int, int, int *, int *)); |
6a140a74 RS |
89 | static int char_quoted P_ ((int, int)); |
90 | static Lisp_Object skip_chars P_ ((int, int, Lisp_Object, Lisp_Object)); | |
91 | static Lisp_Object scan_lists P_ ((int, int, int, int)); | |
92 | static void scan_sexps_forward P_ ((struct lisp_parse_state *, | |
93 | int, int, int, int, | |
94 | int, Lisp_Object, int)); | |
195d1361 RS |
95 | \f |
96 | ||
97 | struct gl_state_s gl_state; /* Global state of syntax parser. */ | |
98 | ||
99 | INTERVAL interval_of (); | |
100 | #define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals | |
101 | to scan to property-change. */ | |
102 | ||
6a140a74 RS |
103 | /* Update gl_state to an appropriate interval which contains CHARPOS. The |
104 | sign of COUNT give the relative position of CHARPOS wrt the previously | |
195d1361 | 105 | valid interval. If INIT, only [be]_property fields of gl_state are |
6a140a74 | 106 | valid at start, the rest is filled basing on OBJECT. |
195d1361 | 107 | |
6a140a74 | 108 | `gl_state.*_i' are the intervals, and CHARPOS is further in the search |
195d1361 RS |
109 | direction than the intervals - or in an interval. We update the |
110 | current syntax-table basing on the property of this interval, and | |
6a140a74 | 111 | update the interval to start further than CHARPOS - or be |
195d1361 | 112 | NULL_INTERVAL. We also update lim_property to be the next value of |
6a140a74 | 113 | charpos to call this subroutine again - or be before/after the |
195d1361 RS |
114 | start/end of OBJECT. */ |
115 | ||
116 | void | |
6a140a74 RS |
117 | update_syntax_table (charpos, count, init, object) |
118 | int charpos, count, init; | |
195d1361 RS |
119 | Lisp_Object object; |
120 | { | |
121 | Lisp_Object tmp_table; | |
4ffe723b | 122 | int cnt = 0, invalidate = 1; |
195d1361 RS |
123 | INTERVAL i, oldi; |
124 | ||
125 | if (init) | |
126 | { | |
127 | gl_state.start = gl_state.b_property; | |
128 | gl_state.stop = gl_state.e_property; | |
6a140a74 | 129 | gl_state.forward_i = interval_of (charpos, object); |
195d1361 RS |
130 | i = gl_state.backward_i = gl_state.forward_i; |
131 | gl_state.left_ok = gl_state.right_ok = 1; | |
132 | invalidate = 0; | |
133 | if (NULL_INTERVAL_P (i)) | |
134 | return; | |
f902a008 | 135 | /* interval_of updates only ->position of the return value, so |
d80f4cc7 RS |
136 | update the parents manually to speed up update_interval. */ |
137 | while (!NULL_PARENT (i)) | |
138 | { | |
139 | if (AM_RIGHT_CHILD (i)) | |
140 | i->parent->position = i->position | |
141 | - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */ | |
142 | - TOTAL_LENGTH (i->parent) | |
143 | + LEFT_TOTAL_LENGTH (i->parent); | |
144 | else | |
145 | i->parent->position = i->position - LEFT_TOTAL_LENGTH (i) | |
146 | + TOTAL_LENGTH (i); | |
147 | i = i->parent; | |
148 | } | |
149 | i = gl_state.forward_i; | |
ee0cdb48 KH |
150 | gl_state.b_property = i->position - 1 - gl_state.offset; |
151 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; | |
195d1361 RS |
152 | goto update; |
153 | } | |
154 | oldi = i = count > 0 ? gl_state.forward_i : gl_state.backward_i; | |
155 | ||
6a140a74 RS |
156 | /* We are guarantied to be called with CHARPOS either in i, |
157 | or further off. */ | |
195d1361 RS |
158 | if (NULL_INTERVAL_P (i)) |
159 | error ("Error in syntax_table logic for to-the-end intervals"); | |
6a140a74 | 160 | else if (charpos < i->position) /* Move left. */ |
195d1361 RS |
161 | { |
162 | if (count > 0) | |
f902a008 | 163 | error ("Error in syntax_table logic for intervals <-"); |
195d1361 | 164 | /* Update the interval. */ |
6a140a74 | 165 | i = update_interval (i, charpos); |
195d1361 RS |
166 | if (oldi->position != INTERVAL_LAST_POS (i)) |
167 | { | |
168 | invalidate = 0; | |
169 | gl_state.right_ok = 1; /* Invalidate the other end. */ | |
170 | gl_state.forward_i = i; | |
ee0cdb48 | 171 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
172 | } |
173 | } | |
6a140a74 | 174 | else if (charpos >= INTERVAL_LAST_POS (i)) /* Move right. */ |
195d1361 RS |
175 | { |
176 | if (count < 0) | |
f902a008 | 177 | error ("Error in syntax_table logic for intervals ->"); |
195d1361 | 178 | /* Update the interval. */ |
6a140a74 | 179 | i = update_interval (i, charpos); |
195d1361 RS |
180 | if (i->position != INTERVAL_LAST_POS (oldi)) |
181 | { | |
182 | invalidate = 0; | |
183 | gl_state.left_ok = 1; /* Invalidate the other end. */ | |
184 | gl_state.backward_i = i; | |
ee0cdb48 | 185 | gl_state.b_property = i->position - 1 - gl_state.offset; |
195d1361 RS |
186 | } |
187 | } | |
188 | else if (count > 0 ? gl_state.right_ok : gl_state.left_ok) | |
189 | { | |
190 | /* We do not need to recalculate tmp_table. */ | |
191 | tmp_table = gl_state.old_prop; | |
192 | } | |
193 | ||
194 | update: | |
195 | tmp_table = textget (i->plist, Qsyntax_table); | |
196 | ||
197 | if (invalidate) | |
198 | invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */ | |
199 | ||
200 | if (invalidate) /* Did not get to adjacent interval. */ | |
201 | { /* with the same table => */ | |
202 | /* invalidate the old range. */ | |
203 | if (count > 0) | |
204 | { | |
205 | gl_state.backward_i = i; | |
206 | gl_state.left_ok = 1; /* Invalidate the other end. */ | |
ee0cdb48 | 207 | gl_state.b_property = i->position - 1 - gl_state.offset; |
195d1361 RS |
208 | } |
209 | else | |
210 | { | |
211 | gl_state.forward_i = i; | |
212 | gl_state.right_ok = 1; /* Invalidate the other end. */ | |
ee0cdb48 | 213 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
214 | } |
215 | } | |
37bef230 | 216 | |
195d1361 RS |
217 | gl_state.current_syntax_table = tmp_table; |
218 | gl_state.old_prop = tmp_table; | |
2e34157c | 219 | if (EQ (Fsyntax_table_p (tmp_table), Qt)) |
195d1361 RS |
220 | { |
221 | gl_state.use_global = 0; | |
222 | } | |
223 | else if (CONSP (tmp_table)) | |
224 | { | |
225 | gl_state.use_global = 1; | |
226 | gl_state.global_code = tmp_table; | |
227 | } | |
228 | else | |
229 | { | |
230 | gl_state.use_global = 0; | |
231 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
232 | } | |
233 | ||
234 | while (!NULL_INTERVAL_P (i)) | |
235 | { | |
236 | if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table))) | |
237 | { | |
238 | if (count > 0) | |
239 | gl_state.right_ok = 0; | |
240 | else | |
241 | gl_state.left_ok = 0; | |
242 | break; | |
243 | } | |
244 | else if (cnt == INTERVALS_AT_ONCE) | |
245 | { | |
246 | if (count > 0) | |
247 | gl_state.right_ok = 1; | |
248 | else | |
249 | gl_state.left_ok = 1; | |
250 | break; | |
251 | } | |
252 | cnt++; | |
253 | i = count > 0 ? next_interval (i) : previous_interval (i); | |
254 | } | |
255 | if (NULL_INTERVAL_P (i)) | |
256 | { /* This property goes to the end. */ | |
257 | if (count > 0) | |
258 | gl_state.e_property = gl_state.stop; | |
259 | else | |
260 | gl_state.b_property = gl_state.start; | |
261 | } | |
262 | else | |
263 | { | |
264 | if (count > 0) | |
265 | { | |
ee0cdb48 | 266 | gl_state.e_property = i->position - gl_state.offset; |
195d1361 RS |
267 | gl_state.forward_i = i; |
268 | } | |
269 | else | |
270 | { | |
ee0cdb48 | 271 | gl_state.b_property = i->position + LENGTH (i) - 1 - gl_state.offset; |
195d1361 RS |
272 | gl_state.backward_i = i; |
273 | } | |
274 | } | |
275 | } | |
276 | \f | |
6a140a74 RS |
277 | /* Returns TRUE if char at CHARPOS is quoted. |
278 | Global syntax-table data should be set up already to be good at CHARPOS | |
279 | or after. On return global syntax data is good for lookup at CHARPOS. */ | |
195d1361 RS |
280 | |
281 | static int | |
6a140a74 RS |
282 | char_quoted (charpos, bytepos) |
283 | register int charpos, bytepos; | |
195d1361 RS |
284 | { |
285 | register enum syntaxcode code; | |
286 | register int beg = BEGV; | |
287 | register int quoted = 0; | |
6a140a74 RS |
288 | int orig = charpos; |
289 | ||
290 | DEC_BOTH (charpos, bytepos); | |
195d1361 | 291 | |
6a140a74 | 292 | while (bytepos >= beg) |
195d1361 | 293 | { |
6a140a74 RS |
294 | UPDATE_SYNTAX_TABLE_BACKWARD (charpos); |
295 | code = SYNTAX (FETCH_CHAR (bytepos)); | |
296 | if (! (code == Scharquote || code == Sescape)) | |
297 | break; | |
298 | ||
299 | DEC_BOTH (charpos, bytepos); | |
300 | quoted = !quoted; | |
195d1361 | 301 | } |
6a140a74 RS |
302 | |
303 | UPDATE_SYNTAX_TABLE (orig); | |
195d1361 RS |
304 | return quoted; |
305 | } | |
6a140a74 RS |
306 | |
307 | /* Return the bytepos one character after BYTEPOS. | |
308 | We assume that BYTEPOS is not at the end of the buffer. */ | |
309 | ||
310 | INLINE int | |
311 | inc_bytepos (bytepos) | |
312 | int bytepos; | |
313 | { | |
ef316cf0 RS |
314 | if (NILP (current_buffer->enable_multibyte_characters)) |
315 | return bytepos + 1; | |
316 | ||
6a140a74 RS |
317 | INC_POS (bytepos); |
318 | return bytepos; | |
319 | } | |
320 | ||
321 | /* Return the bytepos one character before BYTEPOS. | |
322 | We assume that BYTEPOS is not at the start of the buffer. */ | |
323 | ||
324 | INLINE int | |
325 | dec_bytepos (bytepos) | |
326 | int bytepos; | |
327 | { | |
ef316cf0 RS |
328 | if (NILP (current_buffer->enable_multibyte_characters)) |
329 | return bytepos - 1; | |
330 | ||
6a140a74 RS |
331 | DEC_POS (bytepos); |
332 | return bytepos; | |
333 | } | |
195d1361 | 334 | \f |
37bef230 RS |
335 | /* Find a defun-start that is the last one before POS (or nearly the last). |
336 | We record what we find, so that another call in the same area | |
195d1361 RS |
337 | can return the same value right away. |
338 | ||
339 | There is no promise at which position the global syntax data is | |
340 | valid on return from the subroutine, so the caller should explicitly | |
341 | update the global data. */ | |
37bef230 RS |
342 | |
343 | static int | |
6a140a74 RS |
344 | find_defun_start (pos, pos_byte) |
345 | int pos, pos_byte; | |
37bef230 | 346 | { |
6a140a74 | 347 | int opoint = PT, opoint_byte = PT_BYTE; |
37bef230 RS |
348 | |
349 | /* Use previous finding, if it's valid and applies to this inquiry. */ | |
350 | if (current_buffer == find_start_buffer | |
351 | /* Reuse the defun-start even if POS is a little farther on. | |
352 | POS might be in the next defun, but that's ok. | |
353 | Our value may not be the best possible, but will still be usable. */ | |
354 | && pos <= find_start_pos + 1000 | |
355 | && pos >= find_start_value | |
356 | && BEGV == find_start_begv | |
357 | && MODIFF == find_start_modiff) | |
358 | return find_start_value; | |
359 | ||
360 | /* Back up to start of line. */ | |
6a140a74 | 361 | scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1); |
37bef230 | 362 | |
195d1361 RS |
363 | /* We optimize syntax-table lookup for rare updates. Thus we accept |
364 | only those `^\s(' which are good in global _and_ text-property | |
365 | syntax-tables. */ | |
366 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
367 | gl_state.use_global = 0; | |
6a140a74 | 368 | while (PT > BEGV) |
37bef230 RS |
369 | { |
370 | /* Open-paren at start of line means we found our defun-start. */ | |
6a140a74 | 371 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) |
195d1361 | 372 | { |
6a140a74 RS |
373 | SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */ |
374 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) | |
195d1361 RS |
375 | break; |
376 | /* Now fallback to the default value. */ | |
377 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
378 | gl_state.use_global = 0; | |
379 | } | |
37bef230 | 380 | /* Move to beg of previous line. */ |
6a140a74 | 381 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1); |
37bef230 RS |
382 | } |
383 | ||
384 | /* Record what we found, for the next try. */ | |
6a140a74 RS |
385 | find_start_value = PT; |
386 | find_start_value_byte = PT_BYTE; | |
37bef230 RS |
387 | find_start_buffer = current_buffer; |
388 | find_start_modiff = MODIFF; | |
389 | find_start_begv = BEGV; | |
390 | find_start_pos = pos; | |
391 | ||
6a140a74 RS |
392 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
393 | ||
37bef230 RS |
394 | return find_start_value; |
395 | } | |
396 | \f | |
f902a008 RS |
397 | /* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */ |
398 | ||
399 | static int | |
400 | prev_char_comend_first (pos, pos_byte) | |
401 | int pos, pos_byte; | |
402 | { | |
403 | int c, val; | |
404 | ||
405 | DEC_BOTH (pos, pos_byte); | |
406 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
407 | c = FETCH_CHAR (pos_byte); | |
408 | val = SYNTAX_COMEND_FIRST (c); | |
409 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
410 | return val; | |
411 | } | |
412 | ||
413 | /* Return the SYNTAX_COMSTART_FIRST of the character before POS, POS_BYTE. */ | |
414 | ||
415 | static int | |
416 | prev_char_comstart_first (pos, pos_byte) | |
417 | int pos, pos_byte; | |
418 | { | |
419 | int c, val; | |
420 | ||
421 | DEC_BOTH (pos, pos_byte); | |
422 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
423 | c = FETCH_CHAR (pos_byte); | |
424 | val = SYNTAX_COMSTART_FIRST (c); | |
425 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
426 | return val; | |
427 | } | |
428 | ||
6a140a74 RS |
429 | /* Checks whether charpos FROM is at the end of a comment. |
430 | FROM_BYTE is the bytepos corresponding to FROM. | |
431 | Do not move back before STOP. | |
432 | ||
433 | Return a positive value if we find a comment ending at FROM/FROM_BYTE; | |
434 | return -1 otherwise. | |
435 | ||
436 | If successful, store the charpos of the comment's beginning | |
437 | into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR. | |
527a32d9 KH |
438 | |
439 | Global syntax data remains valid for backward search starting at | |
440 | the returned value (or at FROM, if the search was not successful). */ | |
195d1361 RS |
441 | |
442 | static int | |
95ff8dfc | 443 | back_comment (from, from_byte, stop, comnested, comstyle, charpos_ptr, bytepos_ptr) |
6a140a74 | 444 | int from, from_byte, stop; |
95ff8dfc | 445 | int comnested, comstyle; |
6a140a74 | 446 | int *charpos_ptr, *bytepos_ptr; |
195d1361 RS |
447 | { |
448 | /* Look back, counting the parity of string-quotes, | |
449 | and recording the comment-starters seen. | |
450 | When we reach a safe place, assume that's not in a string; | |
451 | then step the main scan to the earliest comment-starter seen | |
452 | an even number of string quotes away from the safe place. | |
453 | ||
454 | OFROM[I] is position of the earliest comment-starter seen | |
455 | which is I+2X quotes from the comment-end. | |
456 | PARITY is current parity of quotes from the comment end. */ | |
457 | int parity = 0; | |
458 | int my_stringend = 0; | |
459 | int string_lossage = 0; | |
460 | int comment_end = from; | |
6a140a74 | 461 | int comment_end_byte = from_byte; |
195d1361 | 462 | int comstart_pos = 0; |
6a140a74 | 463 | int comstart_byte; |
eb35b628 RS |
464 | /* Value that PARITY had, when we reached the position |
465 | in COMSTART_POS. */ | |
466 | int comstart_parity = 0; | |
195d1361 | 467 | int scanstart = from - 1; |
eb35b628 RS |
468 | /* Place where the containing defun starts, |
469 | or 0 if we didn't come across it yet. */ | |
470 | int defun_start = 0; | |
471 | int defun_start_byte = 0; | |
195d1361 | 472 | register enum syntaxcode code; |
95ff8dfc | 473 | int nesting = 1; /* current comment nesting */ |
ea315ed6 | 474 | int c; |
195d1361 RS |
475 | |
476 | /* At beginning of range to scan, we're outside of strings; | |
477 | that determines quote parity to the comment-end. */ | |
478 | while (from != stop) | |
479 | { | |
4ffe723b | 480 | int temp_byte; |
6a140a74 | 481 | |
195d1361 | 482 | /* Move back and examine a character. */ |
6a140a74 | 483 | DEC_BOTH (from, from_byte); |
195d1361 RS |
484 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
485 | ||
6a140a74 | 486 | c = FETCH_CHAR (from_byte); |
195d1361 RS |
487 | code = SYNTAX (c); |
488 | ||
527a32d9 | 489 | /* If this char is the second of a 2-char comment end sequence, |
195d1361 RS |
490 | back up and give the pair the appropriate syntax. */ |
491 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
f902a008 | 492 | && prev_char_comend_first (from, from_byte)) |
195d1361 RS |
493 | { |
494 | code = Sendcomment; | |
6a140a74 | 495 | DEC_BOTH (from, from_byte); |
195d1361 | 496 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 497 | c = FETCH_CHAR (from_byte); |
195d1361 RS |
498 | } |
499 | ||
500 | /* If this char starts a 2-char comment start sequence, | |
501 | treat it like a 1-char comment starter. */ | |
f902a008 RS |
502 | if (from < scanstart && SYNTAX_COMSTART_FIRST (c)) |
503 | { | |
504 | temp_byte = inc_bytepos (from_byte); | |
505 | UPDATE_SYNTAX_TABLE_FORWARD (from + 1); | |
506 | if (SYNTAX_COMSTART_SECOND (FETCH_CHAR (temp_byte)) | |
507 | && comstyle == SYNTAX_COMMENT_STYLE (FETCH_CHAR (temp_byte))) | |
508 | code = Scomment; | |
509 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
510 | } | |
1aa963c8 SM |
511 | else if (code == Scomment && comstyle != SYNTAX_COMMENT_STYLE (c)) |
512 | /* Ignore comment starters of a different style. */ | |
513 | continue; | |
195d1361 | 514 | |
9828a477 KH |
515 | /* Ignore escaped characters, except comment-enders. */ |
516 | if (code != Sendcomment && char_quoted (from, from_byte)) | |
195d1361 RS |
517 | continue; |
518 | ||
519 | /* Track parity of quotes. */ | |
520 | if (code == Sstring) | |
521 | { | |
522 | parity ^= 1; | |
523 | if (my_stringend == 0) | |
524 | my_stringend = c; | |
525 | /* If we have two kinds of string delimiters. | |
526 | There's no way to grok this scanning backwards. */ | |
527 | else if (my_stringend != c) | |
528 | string_lossage = 1; | |
529 | } | |
530 | ||
531 | if (code == Sstring_fence || code == Scomment_fence) | |
532 | { | |
533 | parity ^= 1; | |
534 | if (my_stringend == 0) | |
6a140a74 RS |
535 | my_stringend |
536 | = code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE; | |
195d1361 RS |
537 | /* If we have two kinds of string delimiters. |
538 | There's no way to grok this scanning backwards. */ | |
539 | else if (my_stringend != (code == Sstring_fence | |
540 | ? ST_STRING_STYLE : ST_COMMENT_STYLE)) | |
541 | string_lossage = 1; | |
542 | } | |
543 | ||
195d1361 | 544 | if (code == Scomment) |
1aa963c8 | 545 | /* We've already checked that it is the relevant comstyle. */ |
195d1361 | 546 | { |
95ff8dfc RS |
547 | if (comnested && --nesting <= 0 && parity == 0 && !string_lossage) |
548 | /* nested comments have to be balanced, so we don't need to | |
549 | keep looking for earlier ones. We use here the same (slightly | |
550 | incorrect) reasoning as below: since it is followed by uniform | |
551 | paired string quotes, this comment-start has to be outside of | |
552 | strings, else the comment-end itself would be inside a string. */ | |
553 | goto done; | |
554 | ||
555 | /* Record comment-starters according to that | |
556 | quote-parity to the comment-end. */ | |
195d1361 RS |
557 | comstart_parity = parity; |
558 | comstart_pos = from; | |
6a140a74 | 559 | comstart_byte = from_byte; |
195d1361 RS |
560 | } |
561 | ||
562 | /* If we find another earlier comment-ender, | |
563 | any comment-starts earlier than that don't count | |
564 | (because they go with the earlier comment-ender). */ | |
565 | if (code == Sendcomment | |
6a140a74 | 566 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte)) == comstyle) |
4ffe723b GM |
567 | { |
568 | if (comnested) | |
569 | nesting++; | |
570 | else | |
571 | break; | |
572 | } | |
195d1361 RS |
573 | |
574 | /* Assume a defun-start point is outside of strings. */ | |
575 | if (code == Sopen | |
6a140a74 RS |
576 | && (from == stop |
577 | || (temp_byte = dec_bytepos (from_byte), | |
578 | FETCH_CHAR (temp_byte) == '\n'))) | |
eb35b628 RS |
579 | { |
580 | defun_start = from; | |
581 | defun_start_byte = from_byte; | |
582 | break; | |
583 | } | |
195d1361 RS |
584 | } |
585 | ||
586 | if (comstart_pos == 0) | |
587 | { | |
588 | from = comment_end; | |
6a140a74 | 589 | from_byte = comment_end_byte; |
195d1361 RS |
590 | UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1); |
591 | } | |
592 | /* If the earliest comment starter | |
593 | is followed by uniform paired string quotes or none, | |
594 | we know it can't be inside a string | |
595 | since if it were then the comment ender would be inside one. | |
596 | So it does start a comment. Skip back to it. */ | |
95ff8dfc | 597 | else if (!comnested && comstart_parity == 0 && !string_lossage) |
195d1361 RS |
598 | { |
599 | from = comstart_pos; | |
6a140a74 | 600 | from_byte = comstart_byte; |
195d1361 RS |
601 | /* Globals are correct now. */ |
602 | } | |
603 | else | |
604 | { | |
605 | /* We had two kinds of string delimiters mixed up | |
606 | together. Decode this going forwards. | |
607 | Scan fwd from the previous comment ender | |
608 | to the one in question; this records where we | |
609 | last passed a comment starter. */ | |
610 | struct lisp_parse_state state; | |
eb35b628 RS |
611 | /* If we did not already find the defun start, find it now. */ |
612 | if (defun_start == 0) | |
613 | { | |
614 | defun_start = find_defun_start (comment_end, comment_end_byte); | |
615 | defun_start_byte = find_start_value_byte; | |
616 | } | |
6a140a74 | 617 | scan_sexps_forward (&state, |
eb35b628 | 618 | defun_start, defun_start_byte, |
195d1361 RS |
619 | comment_end - 1, -10000, 0, Qnil, 0); |
620 | if (state.incomment) | |
621 | { | |
622 | /* scan_sexps_forward changed the direction of search in | |
623 | global variables, so we need to update it completely. */ | |
624 | ||
625 | from = state.comstr_start; | |
626 | } | |
627 | else | |
628 | { | |
629 | from = comment_end; | |
630 | } | |
6a140a74 | 631 | from_byte = CHAR_TO_BYTE (from); |
195d1361 RS |
632 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
633 | } | |
634 | ||
95ff8dfc | 635 | done: |
6a140a74 RS |
636 | *charpos_ptr = from; |
637 | *bytepos_ptr = from_byte; | |
638 | ||
1aa963c8 | 639 | return (from == comment_end) ? -1 : from; |
195d1361 RS |
640 | } |
641 | \f | |
8489eb67 | 642 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
2203e1e8 | 643 | "Return t if OBJECT is a syntax table.\n\ |
8ea151b2 | 644 | Currently, any char-table counts as a syntax table.") |
2203e1e8 EN |
645 | (object) |
646 | Lisp_Object object; | |
8489eb67 | 647 | { |
2203e1e8 | 648 | if (CHAR_TABLE_P (object) |
e704cb4b | 649 | && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table)) |
8489eb67 RS |
650 | return Qt; |
651 | return Qnil; | |
652 | } | |
653 | ||
8ea151b2 | 654 | static void |
8489eb67 RS |
655 | check_syntax_table (obj) |
656 | Lisp_Object obj; | |
657 | { | |
d1be9f0f | 658 | if (!(CHAR_TABLE_P (obj) |
e704cb4b | 659 | && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table))) |
d1be9f0f | 660 | wrong_type_argument (Qsyntax_table_p, obj); |
8489eb67 RS |
661 | } |
662 | ||
8489eb67 RS |
663 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, |
664 | "Return the current syntax table.\n\ | |
665 | This is the one specified by the current buffer.") | |
666 | () | |
667 | { | |
668 | return current_buffer->syntax_table; | |
669 | } | |
670 | ||
671 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
672 | Sstandard_syntax_table, 0, 0, 0, | |
673 | "Return the standard syntax table.\n\ | |
674 | This is the one used for new buffers.") | |
675 | () | |
676 | { | |
677 | return Vstandard_syntax_table; | |
678 | } | |
679 | ||
680 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
681 | "Construct a new syntax table and return it.\n\ | |
682 | It is a copy of the TABLE, which defaults to the standard syntax table.") | |
683 | (table) | |
684 | Lisp_Object table; | |
685 | { | |
8ea151b2 RS |
686 | Lisp_Object copy; |
687 | ||
265a9e55 | 688 | if (!NILP (table)) |
8ea151b2 RS |
689 | check_syntax_table (table); |
690 | else | |
691 | table = Vstandard_syntax_table; | |
692 | ||
693 | copy = Fcopy_sequence (table); | |
0f867324 RS |
694 | |
695 | /* Only the standard syntax table should have a default element. | |
696 | Other syntax tables should inherit from parents instead. */ | |
697 | XCHAR_TABLE (copy)->defalt = Qnil; | |
698 | ||
699 | /* Copied syntax tables should all have parents. | |
700 | If we copied one with no parent, such as the standard syntax table, | |
701 | use the standard syntax table as the copy's parent. */ | |
702 | if (NILP (XCHAR_TABLE (copy)->parent)) | |
703 | Fset_char_table_parent (copy, Vstandard_syntax_table); | |
8ea151b2 | 704 | return copy; |
8489eb67 RS |
705 | } |
706 | ||
707 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
708 | "Select a new syntax table for the current buffer.\n\ | |
709 | One argument, a syntax table.") | |
710 | (table) | |
711 | Lisp_Object table; | |
712 | { | |
8ea151b2 | 713 | check_syntax_table (table); |
8489eb67 RS |
714 | current_buffer->syntax_table = table; |
715 | /* Indicate that this buffer now has a specified syntax table. */ | |
f110a664 RS |
716 | current_buffer->local_var_flags |
717 | |= XFASTINT (buffer_local_flags.syntax_table); | |
8489eb67 RS |
718 | return table; |
719 | } | |
720 | \f | |
721 | /* Convert a letter which signifies a syntax code | |
722 | into the code it signifies. | |
195d1361 | 723 | This is used by modify-syntax-entry, and other things. */ |
8489eb67 RS |
724 | |
725 | unsigned char syntax_spec_code[0400] = | |
726 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
727 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
728 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
729 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
195d1361 | 730 | (char) Swhitespace, (char) Scomment_fence, (char) Sstring, 0377, |
8489eb67 RS |
731 | (char) Smath, 0377, 0377, (char) Squote, |
732 | (char) Sopen, (char) Sclose, 0377, 0377, | |
733 | 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
734 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
735 | 0377, 0377, 0377, 0377, | |
736 | (char) Scomment, 0377, (char) Sendcomment, 0377, | |
6cb71bf6 | 737 | (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ |
8489eb67 RS |
738 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
739 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
740 | 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
741 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
742 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
743 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
195d1361 | 744 | 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
8489eb67 RS |
745 | }; |
746 | ||
195d1361 | 747 | /* Indexed by syntax code, give the letter that describes it. */ |
8489eb67 | 748 | |
195d1361 | 749 | char syntax_code_spec[16] = |
8489eb67 | 750 | { |
195d1361 RS |
751 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@', |
752 | '!', '|' | |
8489eb67 | 753 | }; |
93da5fff KH |
754 | |
755 | /* Indexed by syntax code, give the object (cons of syntax code and | |
756 | nil) to be stored in syntax table. Since these objects can be | |
757 | shared among syntax tables, we generate them in advance. By | |
758 | sharing objects, the function `describe-syntax' can give a more | |
759 | compact listing. */ | |
760 | static Lisp_Object Vsyntax_code_object; | |
761 | ||
8489eb67 | 762 | \f |
8ea151b2 RS |
763 | /* Look up the value for CHARACTER in syntax table TABLE's parent |
764 | and its parents. SYNTAX_ENTRY calls this, when TABLE itself has nil | |
765 | for CHARACTER. It's actually used only when not compiled with GCC. */ | |
766 | ||
767 | Lisp_Object | |
768 | syntax_parent_lookup (table, character) | |
769 | Lisp_Object table; | |
770 | int character; | |
771 | { | |
772 | Lisp_Object value; | |
773 | ||
774 | while (1) | |
775 | { | |
776 | table = XCHAR_TABLE (table)->parent; | |
777 | if (NILP (table)) | |
778 | return Qnil; | |
779 | ||
780 | value = XCHAR_TABLE (table)->contents[character]; | |
781 | if (!NILP (value)) | |
782 | return value; | |
783 | } | |
784 | } | |
785 | ||
8489eb67 | 786 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, |
2203e1e8 EN |
787 | "Return the syntax code of CHARACTER, described by a character.\n\ |
788 | For example, if CHARACTER is a word constituent,\n\ | |
789 | the character `w' is returned.\n\ | |
8489eb67 RS |
790 | The characters that correspond to various syntax codes\n\ |
791 | are listed in the documentation of `modify-syntax-entry'.") | |
2203e1e8 EN |
792 | (character) |
793 | Lisp_Object character; | |
8489eb67 | 794 | { |
8ea151b2 | 795 | int char_int; |
195d1361 RS |
796 | gl_state.current_syntax_table = current_buffer->syntax_table; |
797 | ||
798 | gl_state.use_global = 0; | |
2203e1e8 EN |
799 | CHECK_NUMBER (character, 0); |
800 | char_int = XINT (character); | |
8ea151b2 | 801 | return make_number (syntax_code_spec[(int) SYNTAX (char_int)]); |
beefa22e RS |
802 | } |
803 | ||
804 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
2203e1e8 EN |
805 | "Return the matching parenthesis of CHARACTER, or nil if none.") |
806 | (character) | |
807 | Lisp_Object character; | |
beefa22e | 808 | { |
8ea151b2 | 809 | int char_int, code; |
195d1361 RS |
810 | gl_state.current_syntax_table = current_buffer->syntax_table; |
811 | gl_state.use_global = 0; | |
2203e1e8 EN |
812 | CHECK_NUMBER (character, 0); |
813 | char_int = XINT (character); | |
8ea151b2 | 814 | code = SYNTAX (char_int); |
a8bd7cd8 | 815 | if (code == Sopen || code == Sclose) |
2e34157c | 816 | return SYNTAX_MATCH (char_int); |
beefa22e | 817 | return Qnil; |
8489eb67 RS |
818 | } |
819 | ||
820 | /* This comment supplies the doc string for modify-syntax-entry, | |
821 | for make-docfile to see. We cannot put this in the real DEFUN | |
822 | due to limits in the Unix cpp. | |
823 | ||
2fcea188 | 824 | DEFUN ("modify-syntax-entry", foo, bar, 2, 3, 0, |
8489eb67 RS |
825 | "Set syntax for character CHAR according to string S.\n\ |
826 | The syntax is changed only for table TABLE, which defaults to\n\ | |
827 | the current buffer's syntax table.\n\ | |
828 | The first character of S should be one of the following:\n\ | |
32676c08 JB |
829 | Space or - whitespace syntax. w word constituent.\n\ |
830 | _ symbol constituent. . punctuation.\n\ | |
831 | ( open-parenthesis. ) close-parenthesis.\n\ | |
832 | \" string quote. \\ escape.\n\ | |
833 | $ paired delimiter. ' expression quote or prefix operator.\n\ | |
abae13bd | 834 | < comment starter. > comment ender.\n\ |
6cb71bf6 | 835 | / character-quote. @ inherit from `standard-syntax-table'.\n\ |
abae13bd | 836 | \n\ |
8489eb67 RS |
837 | Only single-character comment start and end sequences are represented thus.\n\ |
838 | Two-character sequences are represented as described below.\n\ | |
839 | The second character of S is the matching parenthesis,\n\ | |
840 | used only if the first character is `(' or `)'.\n\ | |
841 | Any additional characters are flags.\n\ | |
95ff8dfc | 842 | Defined flags are the characters 1, 2, 3, 4, b, p, and n.\n\ |
2203e1e8 EN |
843 | 1 means CHAR is the start of a two-char comment start sequence.\n\ |
844 | 2 means CHAR is the second character of such a sequence.\n\ | |
845 | 3 means CHAR is the start of a two-char comment end sequence.\n\ | |
846 | 4 means CHAR is the second character of such a sequence.\n\ | |
e5d4f4dc | 847 | \n\ |
195d1361 | 848 | There can be up to two orthogonal comment sequences. This is to support\n\ |
e5d4f4dc | 849 | language modes such as C++. By default, all comment sequences are of style\n\ |
abae13bd RS |
850 | a, but you can set the comment sequence style to b (on the second character\n\ |
851 | of a comment-start, or the first character of a comment-end sequence) using\n\ | |
e5d4f4dc | 852 | this flag:\n\ |
2203e1e8 | 853 | b means CHAR is part of comment sequence b.\n\ |
95ff8dfc | 854 | n means CHAR is part of a nestable comment sequence.\n\ |
e5d4f4dc | 855 | \n\ |
2203e1e8 | 856 | p means CHAR is a prefix character for `backward-prefix-chars';\n\ |
e5d4f4dc | 857 | such characters are treated as whitespace when they occur\n\ |
8489eb67 | 858 | between expressions.") |
2fcea188 | 859 | (char, s, table) |
8489eb67 RS |
860 | */ |
861 | ||
862 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, | |
863 | /* I really don't know why this is interactive | |
864 | help-form should at least be made useful whilst reading the second arg | |
865 | */ | |
866 | "cSet syntax for character: \nsSet syntax for %s to: ", | |
867 | 0 /* See immediately above */) | |
868 | (c, newentry, syntax_table) | |
869 | Lisp_Object c, newentry, syntax_table; | |
870 | { | |
8ea151b2 | 871 | register unsigned char *p; |
8489eb67 | 872 | register enum syntaxcode code; |
247e20a8 | 873 | int val; |
8ea151b2 | 874 | Lisp_Object match; |
8489eb67 RS |
875 | |
876 | CHECK_NUMBER (c, 0); | |
877 | CHECK_STRING (newentry, 1); | |
8ea151b2 | 878 | |
265a9e55 | 879 | if (NILP (syntax_table)) |
8489eb67 RS |
880 | syntax_table = current_buffer->syntax_table; |
881 | else | |
8ea151b2 | 882 | check_syntax_table (syntax_table); |
8489eb67 RS |
883 | |
884 | p = XSTRING (newentry)->data; | |
885 | code = (enum syntaxcode) syntax_spec_code[*p++]; | |
886 | if (((int) code & 0377) == 0377) | |
2e34157c | 887 | error ("invalid syntax description letter: %c", p[-1]); |
8489eb67 | 888 | |
8ea151b2 RS |
889 | if (code == Sinherit) |
890 | { | |
e704cb4b | 891 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), Qnil); |
8ea151b2 RS |
892 | return Qnil; |
893 | } | |
894 | ||
895 | if (*p) | |
d1be9f0f | 896 | { |
93da5fff | 897 | int len; |
7c19e8e1 KH |
898 | int character = (STRING_CHAR_AND_LENGTH |
899 | (p, STRING_BYTES (XSTRING (newentry)) - 1, len)); | |
93da5fff | 900 | XSETINT (match, character); |
d1be9f0f RS |
901 | if (XFASTINT (match) == ' ') |
902 | match = Qnil; | |
93da5fff | 903 | p += len; |
d1be9f0f RS |
904 | } |
905 | else | |
8ea151b2 | 906 | match = Qnil; |
8489eb67 | 907 | |
8ea151b2 | 908 | val = (int) code; |
8489eb67 RS |
909 | while (*p) |
910 | switch (*p++) | |
911 | { | |
912 | case '1': | |
247e20a8 | 913 | val |= 1 << 16; |
8489eb67 RS |
914 | break; |
915 | ||
916 | case '2': | |
247e20a8 | 917 | val |= 1 << 17; |
8489eb67 RS |
918 | break; |
919 | ||
920 | case '3': | |
247e20a8 | 921 | val |= 1 << 18; |
8489eb67 RS |
922 | break; |
923 | ||
924 | case '4': | |
247e20a8 | 925 | val |= 1 << 19; |
8489eb67 RS |
926 | break; |
927 | ||
928 | case 'p': | |
247e20a8 | 929 | val |= 1 << 20; |
8489eb67 | 930 | break; |
e5d4f4dc RS |
931 | |
932 | case 'b': | |
247e20a8 | 933 | val |= 1 << 21; |
e5d4f4dc | 934 | break; |
95ff8dfc RS |
935 | |
936 | case 'n': | |
937 | val |= 1 << 22; | |
938 | break; | |
8489eb67 RS |
939 | } |
940 | ||
93da5fff KH |
941 | if (val < XVECTOR (Vsyntax_code_object)->size && NILP (match)) |
942 | newentry = XVECTOR (Vsyntax_code_object)->contents[val]; | |
943 | else | |
944 | /* Since we can't use a shared object, let's make a new one. */ | |
945 | newentry = Fcons (make_number (val), match); | |
946 | ||
e704cb4b | 947 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), newentry); |
8489eb67 RS |
948 | |
949 | return Qnil; | |
950 | } | |
951 | \f | |
952 | /* Dump syntax table to buffer in human-readable format */ | |
953 | ||
340f92b5 | 954 | static void |
8489eb67 RS |
955 | describe_syntax (value) |
956 | Lisp_Object value; | |
957 | { | |
958 | register enum syntaxcode code; | |
4ffe723b | 959 | char desc, start1, start2, end1, end2, prefix, comstyle; |
8489eb67 | 960 | char str[2]; |
8ea151b2 | 961 | Lisp_Object first, match_lisp; |
8489eb67 RS |
962 | |
963 | Findent_to (make_number (16), make_number (1)); | |
964 | ||
8ea151b2 RS |
965 | if (NILP (value)) |
966 | { | |
93da5fff | 967 | insert_string ("default\n"); |
8ea151b2 RS |
968 | return; |
969 | } | |
970 | ||
908b7fea KH |
971 | if (CHAR_TABLE_P (value)) |
972 | { | |
973 | insert_string ("deeper char-table ...\n"); | |
974 | return; | |
975 | } | |
976 | ||
8ea151b2 RS |
977 | if (!CONSP (value)) |
978 | { | |
93da5fff | 979 | insert_string ("invalid\n"); |
8ea151b2 RS |
980 | return; |
981 | } | |
982 | ||
c1d497be KR |
983 | first = XCAR (value); |
984 | match_lisp = XCDR (value); | |
8ea151b2 RS |
985 | |
986 | if (!INTEGERP (first) || !(NILP (match_lisp) || INTEGERP (match_lisp))) | |
8489eb67 | 987 | { |
93da5fff | 988 | insert_string ("invalid\n"); |
8489eb67 RS |
989 | return; |
990 | } | |
991 | ||
e704cb4b | 992 | code = (enum syntaxcode) (XINT (first) & 0377); |
8ea151b2 RS |
993 | start1 = (XINT (first) >> 16) & 1; |
994 | start2 = (XINT (first) >> 17) & 1; | |
995 | end1 = (XINT (first) >> 18) & 1; | |
996 | end2 = (XINT (first) >> 19) & 1; | |
997 | prefix = (XINT (first) >> 20) & 1; | |
998 | comstyle = (XINT (first) >> 21) & 1; | |
8489eb67 RS |
999 | |
1000 | if ((int) code < 0 || (int) code >= (int) Smax) | |
1001 | { | |
1002 | insert_string ("invalid"); | |
1003 | return; | |
1004 | } | |
1005 | desc = syntax_code_spec[(int) code]; | |
1006 | ||
1007 | str[0] = desc, str[1] = 0; | |
1008 | insert (str, 1); | |
1009 | ||
93da5fff KH |
1010 | if (NILP (match_lisp)) |
1011 | insert (" ", 1); | |
1012 | else | |
1013 | insert_char (XINT (match_lisp)); | |
8489eb67 | 1014 | |
8489eb67 RS |
1015 | if (start1) |
1016 | insert ("1", 1); | |
1017 | if (start2) | |
1018 | insert ("2", 1); | |
1019 | ||
1020 | if (end1) | |
1021 | insert ("3", 1); | |
1022 | if (end2) | |
1023 | insert ("4", 1); | |
1024 | ||
1025 | if (prefix) | |
1026 | insert ("p", 1); | |
e5d4f4dc RS |
1027 | if (comstyle) |
1028 | insert ("b", 1); | |
8489eb67 RS |
1029 | |
1030 | insert_string ("\twhich means: "); | |
1031 | ||
0220c518 | 1032 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
1033 | { |
1034 | case Swhitespace: | |
1035 | insert_string ("whitespace"); break; | |
1036 | case Spunct: | |
1037 | insert_string ("punctuation"); break; | |
1038 | case Sword: | |
1039 | insert_string ("word"); break; | |
1040 | case Ssymbol: | |
1041 | insert_string ("symbol"); break; | |
1042 | case Sopen: | |
1043 | insert_string ("open"); break; | |
1044 | case Sclose: | |
1045 | insert_string ("close"); break; | |
1046 | case Squote: | |
1047 | insert_string ("quote"); break; | |
1048 | case Sstring: | |
1049 | insert_string ("string"); break; | |
1050 | case Smath: | |
1051 | insert_string ("math"); break; | |
1052 | case Sescape: | |
1053 | insert_string ("escape"); break; | |
1054 | case Scharquote: | |
1055 | insert_string ("charquote"); break; | |
1056 | case Scomment: | |
1057 | insert_string ("comment"); break; | |
1058 | case Sendcomment: | |
1059 | insert_string ("endcomment"); break; | |
1060 | default: | |
1061 | insert_string ("invalid"); | |
1062 | return; | |
1063 | } | |
1064 | ||
8ea151b2 | 1065 | if (!NILP (match_lisp)) |
8489eb67 RS |
1066 | { |
1067 | insert_string (", matches "); | |
8ea151b2 | 1068 | insert_char (XINT (match_lisp)); |
8489eb67 RS |
1069 | } |
1070 | ||
1071 | if (start1) | |
1072 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
1073 | if (start2) | |
1074 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
1075 | ||
1076 | if (end1) | |
1077 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
1078 | if (end2) | |
1079 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
1080 | if (comstyle) |
1081 | insert_string (" (comment style b)"); | |
1082 | ||
8489eb67 RS |
1083 | if (prefix) |
1084 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
1085 | ||
1086 | insert_string ("\n"); | |
1087 | } | |
1088 | ||
340f92b5 | 1089 | static Lisp_Object |
8489eb67 RS |
1090 | describe_syntax_1 (vector) |
1091 | Lisp_Object vector; | |
1092 | { | |
1093 | struct buffer *old = current_buffer; | |
1094 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
e41819d4 | 1095 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil, (int *) 0, 0); |
93da5fff KH |
1096 | while (! NILP (XCHAR_TABLE (vector)->parent)) |
1097 | { | |
1098 | vector = XCHAR_TABLE (vector)->parent; | |
1099 | insert_string ("\nThe parent syntax table is:"); | |
e41819d4 RS |
1100 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil, |
1101 | (int *) 0, 0); | |
93da5fff KH |
1102 | } |
1103 | ||
36cd82fe | 1104 | call0 (intern ("help-mode")); |
8489eb67 RS |
1105 | set_buffer_internal (old); |
1106 | return Qnil; | |
1107 | } | |
1108 | ||
1109 | DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "", | |
1110 | "Describe the syntax specifications in the syntax table.\n\ | |
1111 | The descriptions are inserted in a buffer, which is then displayed.") | |
1112 | () | |
1113 | { | |
1114 | internal_with_output_to_temp_buffer | |
1115 | ("*Help*", describe_syntax_1, current_buffer->syntax_table); | |
1116 | ||
1117 | return Qnil; | |
1118 | } | |
1119 | \f | |
195d1361 RS |
1120 | int parse_sexp_ignore_comments; |
1121 | ||
8489eb67 RS |
1122 | /* Return the position across COUNT words from FROM. |
1123 | If that many words cannot be found before the end of the buffer, return 0. | |
1124 | COUNT negative means scan backward and stop at word beginning. */ | |
1125 | ||
dfcf069d | 1126 | int |
8489eb67 RS |
1127 | scan_words (from, count) |
1128 | register int from, count; | |
1129 | { | |
1130 | register int beg = BEGV; | |
1131 | register int end = ZV; | |
6a140a74 | 1132 | register int from_byte = CHAR_TO_BYTE (from); |
93da5fff KH |
1133 | register enum syntaxcode code; |
1134 | int ch0, ch1; | |
8489eb67 RS |
1135 | |
1136 | immediate_quit = 1; | |
1137 | QUIT; | |
1138 | ||
195d1361 RS |
1139 | SETUP_SYNTAX_TABLE (from, count); |
1140 | ||
8489eb67 RS |
1141 | while (count > 0) |
1142 | { | |
1143 | while (1) | |
1144 | { | |
1145 | if (from == end) | |
1146 | { | |
1147 | immediate_quit = 0; | |
1148 | return 0; | |
1149 | } | |
195d1361 | 1150 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1151 | ch0 = FETCH_CHAR (from_byte); |
93da5fff | 1152 | code = SYNTAX (ch0); |
6a140a74 | 1153 | INC_BOTH (from, from_byte); |
8489eb67 RS |
1154 | if (words_include_escapes |
1155 | && (code == Sescape || code == Scharquote)) | |
1156 | break; | |
1157 | if (code == Sword) | |
1158 | break; | |
8489eb67 | 1159 | } |
93da5fff KH |
1160 | /* Now CH0 is a character which begins a word and FROM is the |
1161 | position of the next character. */ | |
8489eb67 RS |
1162 | while (1) |
1163 | { | |
1164 | if (from == end) break; | |
195d1361 | 1165 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1166 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1167 | code = SYNTAX (ch1); |
8489eb67 RS |
1168 | if (!(words_include_escapes |
1169 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1170 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1171 | break; |
6a140a74 | 1172 | INC_BOTH (from, from_byte); |
93da5fff | 1173 | ch0 = ch1; |
8489eb67 RS |
1174 | } |
1175 | count--; | |
1176 | } | |
1177 | while (count < 0) | |
1178 | { | |
1179 | while (1) | |
1180 | { | |
1181 | if (from == beg) | |
1182 | { | |
1183 | immediate_quit = 0; | |
1184 | return 0; | |
1185 | } | |
6a140a74 | 1186 | DEC_BOTH (from, from_byte); |
195d1361 | 1187 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1188 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1189 | code = SYNTAX (ch1); |
8489eb67 RS |
1190 | if (words_include_escapes |
1191 | && (code == Sescape || code == Scharquote)) | |
1192 | break; | |
1193 | if (code == Sword) | |
1194 | break; | |
8489eb67 | 1195 | } |
93da5fff KH |
1196 | /* Now CH1 is a character which ends a word and FROM is the |
1197 | position of it. */ | |
8489eb67 RS |
1198 | while (1) |
1199 | { | |
6a140a74 RS |
1200 | int temp_byte; |
1201 | ||
1202 | if (from == beg) | |
1203 | break; | |
1204 | temp_byte = dec_bytepos (from_byte); | |
195d1361 | 1205 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1206 | ch0 = FETCH_CHAR (temp_byte); |
93da5fff | 1207 | code = SYNTAX (ch0); |
8489eb67 RS |
1208 | if (!(words_include_escapes |
1209 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1210 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1211 | break; |
6a140a74 | 1212 | DEC_BOTH (from, from_byte); |
93da5fff | 1213 | ch1 = ch0; |
8489eb67 RS |
1214 | } |
1215 | count++; | |
1216 | } | |
1217 | ||
1218 | immediate_quit = 0; | |
1219 | ||
1220 | return from; | |
1221 | } | |
1222 | ||
1223 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", | |
1224 | "Move point forward ARG words (backward if ARG is negative).\n\ | |
1225 | Normally returns t.\n\ | |
2c6ea900 | 1226 | If an edge of the buffer or a field boundary is reached, point is left there\n\ |
e6d8341f GM |
1227 | and the function returns nil. Field boundaries are not noticed if\n\ |
1228 | `inhibit-field-text-motion' is non-nil.") | |
8489eb67 RS |
1229 | (count) |
1230 | Lisp_Object count; | |
1231 | { | |
2c6ea900 | 1232 | int orig_val, val; |
8489eb67 RS |
1233 | CHECK_NUMBER (count, 0); |
1234 | ||
2c6ea900 RS |
1235 | val = orig_val = scan_words (PT, XINT (count)); |
1236 | if (! orig_val) | |
1237 | val = XINT (count) > 0 ? ZV : BEGV; | |
5878ee6f | 1238 | |
b8855607 | 1239 | /* Avoid jumping out of an input field. */ |
64aa4eb1 GM |
1240 | val = XFASTINT (Fconstrain_to_field (make_number (val), make_number (PT), |
1241 | Qt, Qnil)); | |
1242 | ||
8489eb67 | 1243 | SET_PT (val); |
e6d8341f | 1244 | return val == orig_val ? Qt : Qnil; |
8489eb67 RS |
1245 | } |
1246 | \f | |
195d1361 RS |
1247 | Lisp_Object skip_chars (); |
1248 | ||
1249 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, | |
1250 | "Move point forward, stopping before a char not in STRING, or at pos LIM.\n\ | |
1251 | STRING is like the inside of a `[...]' in a regular expression\n\ | |
74cf0beb RS |
1252 | except that `]' is never special and `\\' quotes `^', `-' or `\\'\n\ |
1253 | (but not as the end of a range; quoting is never needed there).\n\ | |
195d1361 RS |
1254 | Thus, with arg \"a-zA-Z\", this skips letters stopping before first nonletter.\n\ |
1255 | With arg \"^a-zA-Z\", skips nonletters stopping before first letter.\n\ | |
1256 | Returns the distance traveled, either zero or positive.") | |
1257 | (string, lim) | |
1258 | Lisp_Object string, lim; | |
1259 | { | |
1260 | return skip_chars (1, 0, string, lim); | |
1261 | } | |
1262 | ||
1263 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, | |
1264 | "Move point backward, stopping after a char not in STRING, or at pos LIM.\n\ | |
1265 | See `skip-chars-forward' for details.\n\ | |
1266 | Returns the distance traveled, either zero or negative.") | |
1267 | (string, lim) | |
1268 | Lisp_Object string, lim; | |
1269 | { | |
1270 | return skip_chars (0, 0, string, lim); | |
1271 | } | |
1272 | ||
1273 | DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0, | |
1274 | "Move point forward across chars in specified syntax classes.\n\ | |
1275 | SYNTAX is a string of syntax code characters.\n\ | |
1276 | Stop before a char whose syntax is not in SYNTAX, or at position LIM.\n\ | |
1277 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\ | |
1278 | This function returns the distance traveled, either zero or positive.") | |
1279 | (syntax, lim) | |
1280 | Lisp_Object syntax, lim; | |
1281 | { | |
1282 | return skip_chars (1, 1, syntax, lim); | |
1283 | } | |
1284 | ||
1285 | DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0, | |
1286 | "Move point backward across chars in specified syntax classes.\n\ | |
1287 | SYNTAX is a string of syntax code characters.\n\ | |
1288 | Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM.\n\ | |
1289 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\ | |
1290 | This function returns the distance traveled, either zero or negative.") | |
1291 | (syntax, lim) | |
1292 | Lisp_Object syntax, lim; | |
1293 | { | |
1294 | return skip_chars (0, 1, syntax, lim); | |
1295 | } | |
1296 | ||
6a140a74 | 1297 | static Lisp_Object |
195d1361 RS |
1298 | skip_chars (forwardp, syntaxp, string, lim) |
1299 | int forwardp, syntaxp; | |
1300 | Lisp_Object string, lim; | |
1301 | { | |
195d1361 | 1302 | register unsigned int c; |
7e68b0ea | 1303 | register int ch; |
195d1361 | 1304 | unsigned char fastmap[0400]; |
7e68b0ea RS |
1305 | /* If SYNTAXP is 0, STRING may contain multi-byte form of characters |
1306 | of which codes don't fit in FASTMAP. In that case, we set the | |
1307 | first byte of multibyte form (i.e. base leading-code) in FASTMAP | |
1308 | and set the actual ranges of characters in CHAR_RANGES. In the | |
1309 | form "X-Y" of STRING, both X and Y must belong to the same | |
1310 | character set because a range striding across character sets is | |
1311 | meaningless. */ | |
5df4982e | 1312 | int *char_ranges; |
7e68b0ea | 1313 | int n_char_ranges = 0; |
195d1361 | 1314 | int negate = 0; |
4101e6fe | 1315 | register int i, i_byte; |
7e68b0ea | 1316 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
1674d9a2 RS |
1317 | int string_multibyte; |
1318 | int size_byte; | |
195d1361 RS |
1319 | |
1320 | CHECK_STRING (string, 0); | |
5df4982e | 1321 | char_ranges = (int *) alloca (XSTRING (string)->size * (sizeof (int)) * 2); |
1674d9a2 RS |
1322 | string_multibyte = STRING_MULTIBYTE (string); |
1323 | size_byte = STRING_BYTES (XSTRING (string)); | |
195d1361 RS |
1324 | |
1325 | if (NILP (lim)) | |
1326 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1327 | else | |
6a140a74 | 1328 | CHECK_NUMBER_COERCE_MARKER (lim, 0); |
195d1361 RS |
1329 | |
1330 | /* In any case, don't allow scan outside bounds of buffer. */ | |
195d1361 RS |
1331 | if (XINT (lim) > ZV) |
1332 | XSETFASTINT (lim, ZV); | |
1333 | if (XINT (lim) < BEGV) | |
1334 | XSETFASTINT (lim, BEGV); | |
1335 | ||
195d1361 RS |
1336 | bzero (fastmap, sizeof fastmap); |
1337 | ||
4101e6fe RS |
1338 | i = 0, i_byte = 0; |
1339 | ||
13090112 | 1340 | if (i_byte < size_byte |
4101e6fe | 1341 | && XSTRING (string)->data[0] == '^') |
195d1361 | 1342 | { |
4101e6fe | 1343 | negate = 1; i++, i_byte++; |
195d1361 RS |
1344 | } |
1345 | ||
1346 | /* Find the characters specified and set their elements of fastmap. | |
1347 | If syntaxp, each character counts as itself. | |
1348 | Otherwise, handle backslashes and ranges specially. */ | |
1349 | ||
13090112 | 1350 | while (i_byte < size_byte) |
195d1361 | 1351 | { |
4101e6fe RS |
1352 | int c_leading_code; |
1353 | ||
1354 | if (string_multibyte) | |
7e68b0ea | 1355 | { |
4101e6fe RS |
1356 | c_leading_code = XSTRING (string)->data[i_byte]; |
1357 | FETCH_STRING_CHAR_ADVANCE (c, string, i, i_byte); | |
7e68b0ea RS |
1358 | } |
1359 | else | |
13090112 | 1360 | c = c_leading_code = XSTRING (string)->data[i_byte++]; |
4101e6fe RS |
1361 | |
1362 | /* Convert multibyteness between what the string has | |
1363 | and what the buffer has. */ | |
1364 | if (multibyte) | |
b29ff194 | 1365 | c = unibyte_char_to_multibyte (c); |
4101e6fe RS |
1366 | else |
1367 | c &= 0377; | |
1368 | ||
195d1361 | 1369 | if (syntaxp) |
4101e6fe | 1370 | fastmap[syntax_spec_code[c & 0377]] = 1; |
195d1361 RS |
1371 | else |
1372 | { | |
1373 | if (c == '\\') | |
1374 | { | |
13090112 | 1375 | if (i_byte == size_byte) |
4101e6fe RS |
1376 | break; |
1377 | ||
1378 | if (string_multibyte) | |
74cf0beb | 1379 | { |
13090112 | 1380 | c_leading_code = XSTRING (string)->data[i_byte]; |
74cf0beb RS |
1381 | FETCH_STRING_CHAR_ADVANCE (c, string, i, i_byte); |
1382 | } | |
4101e6fe | 1383 | else |
13090112 | 1384 | c = c_leading_code = XSTRING (string)->data[i_byte++]; |
195d1361 | 1385 | } |
13090112 | 1386 | if (i_byte < size_byte |
06274af5 | 1387 | && XSTRING (string)->data[i_byte] == '-') |
195d1361 | 1388 | { |
06274af5 | 1389 | unsigned int c2, c2_leading_code; |
4101e6fe RS |
1390 | |
1391 | /* Skip over the dash. */ | |
1392 | i++, i_byte++; | |
1393 | ||
13090112 | 1394 | if (i_byte == size_byte) |
4101e6fe RS |
1395 | break; |
1396 | ||
1397 | /* Get the end of the range. */ | |
1398 | if (string_multibyte) | |
06274af5 KH |
1399 | { |
1400 | c2_leading_code = XSTRING (string)->data[i_byte]; | |
1401 | FETCH_STRING_CHAR_ADVANCE (c2, string, i, i_byte); | |
1402 | } | |
4101e6fe | 1403 | else |
13090112 | 1404 | c2 = XSTRING (string)->data[i_byte++]; |
7e68b0ea | 1405 | |
4101e6fe | 1406 | if (SINGLE_BYTE_CHAR_P (c)) |
06274af5 KH |
1407 | { |
1408 | if (! SINGLE_BYTE_CHAR_P (c2)) | |
1409 | error ("Invalid charcter range: %s", | |
1410 | XSTRING (string)->data); | |
1411 | while (c <= c2) | |
1412 | { | |
1413 | fastmap[c] = 1; | |
1414 | c++; | |
1415 | } | |
1416 | } | |
7e68b0ea | 1417 | else |
195d1361 | 1418 | { |
06274af5 KH |
1419 | if (c_leading_code != c2_leading_code) |
1420 | error ("Invalid charcter range: %s", | |
1421 | XSTRING (string)->data); | |
4101e6fe RS |
1422 | fastmap[c_leading_code] = 1; |
1423 | if (c <= c2) | |
1424 | { | |
1425 | char_ranges[n_char_ranges++] = c; | |
1426 | char_ranges[n_char_ranges++] = c2; | |
1427 | } | |
195d1361 | 1428 | } |
195d1361 RS |
1429 | } |
1430 | else | |
7e68b0ea | 1431 | { |
4101e6fe RS |
1432 | fastmap[c_leading_code] = 1; |
1433 | if (!SINGLE_BYTE_CHAR_P (c)) | |
7e68b0ea | 1434 | { |
4101e6fe RS |
1435 | char_ranges[n_char_ranges++] = c; |
1436 | char_ranges[n_char_ranges++] = c; | |
7e68b0ea RS |
1437 | } |
1438 | } | |
195d1361 RS |
1439 | } |
1440 | } | |
1441 | ||
7e68b0ea RS |
1442 | /* If ^ was the first character, complement the fastmap. In |
1443 | addition, as all multibyte characters have possibility of | |
1444 | matching, set all entries for base leading codes, which is | |
1445 | harmless even if SYNTAXP is 1. */ | |
195d1361 RS |
1446 | |
1447 | if (negate) | |
1448 | for (i = 0; i < sizeof fastmap; i++) | |
7e68b0ea RS |
1449 | { |
1450 | if (!multibyte || !BASE_LEADING_CODE_P (i)) | |
1451 | fastmap[i] ^= 1; | |
1452 | else | |
1453 | fastmap[i] = 1; | |
1454 | } | |
195d1361 RS |
1455 | |
1456 | { | |
1457 | int start_point = PT; | |
1458 | int pos = PT; | |
6a140a74 | 1459 | int pos_byte = PT_BYTE; |
195d1361 RS |
1460 | |
1461 | immediate_quit = 1; | |
1462 | if (syntaxp) | |
1463 | { | |
1464 | SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1); | |
1465 | if (forwardp) | |
1466 | { | |
7e68b0ea | 1467 | if (multibyte) |
195d1361 | 1468 | { |
ee0cdb48 KH |
1469 | if (pos < XINT (lim)) |
1470 | while (fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))]) | |
1471 | { | |
1472 | /* Since we already checked for multibyteness, | |
1473 | avoid using INC_BOTH which checks again. */ | |
1474 | INC_POS (pos_byte); | |
1475 | pos++; | |
1476 | if (pos >= XINT (lim)) | |
1477 | break; | |
1478 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1479 | } | |
7e68b0ea RS |
1480 | } |
1481 | else | |
1482 | { | |
1483 | while (pos < XINT (lim) | |
1484 | && fastmap[(int) SYNTAX (FETCH_BYTE (pos))]) | |
1485 | { | |
1486 | pos++; | |
1487 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1488 | } | |
195d1361 RS |
1489 | } |
1490 | } | |
1491 | else | |
1492 | { | |
7e68b0ea | 1493 | if (multibyte) |
195d1361 | 1494 | { |
7e68b0ea RS |
1495 | while (pos > XINT (lim)) |
1496 | { | |
6a140a74 | 1497 | int savepos = pos_byte; |
ef316cf0 RS |
1498 | /* Since we already checked for multibyteness, |
1499 | avoid using DEC_BOTH which checks again. */ | |
1500 | pos--; | |
1501 | DEC_POS (pos_byte); | |
4c8535eb | 1502 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); |
6a140a74 | 1503 | if (!fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))]) |
7e68b0ea | 1504 | { |
6a140a74 RS |
1505 | pos++; |
1506 | pos_byte = savepos; | |
7e68b0ea RS |
1507 | break; |
1508 | } | |
7e68b0ea RS |
1509 | } |
1510 | } | |
1511 | else | |
1512 | { | |
ee0cdb48 KH |
1513 | if (pos > XINT (lim)) |
1514 | while (fastmap[(int) SYNTAX (FETCH_BYTE (pos - 1))]) | |
1515 | { | |
1516 | pos--; | |
1517 | if (pos <= XINT (lim)) | |
4c8535eb | 1518 | break; |
ee0cdb48 KH |
1519 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
1520 | } | |
195d1361 RS |
1521 | } |
1522 | } | |
1523 | } | |
1524 | else | |
1525 | { | |
1526 | if (forwardp) | |
1527 | { | |
7e68b0ea | 1528 | if (multibyte) |
6a140a74 | 1529 | while (pos < XINT (lim) && fastmap[(c = FETCH_BYTE (pos_byte))]) |
7e68b0ea RS |
1530 | { |
1531 | if (!BASE_LEADING_CODE_P (c)) | |
6a140a74 | 1532 | INC_BOTH (pos, pos_byte); |
7e68b0ea RS |
1533 | else if (n_char_ranges) |
1534 | { | |
1535 | /* We much check CHAR_RANGES for a multibyte | |
1536 | character. */ | |
6a140a74 | 1537 | ch = FETCH_MULTIBYTE_CHAR (pos_byte); |
7e68b0ea RS |
1538 | for (i = 0; i < n_char_ranges; i += 2) |
1539 | if ((ch >= char_ranges[i] && ch <= char_ranges[i + 1])) | |
1540 | break; | |
1541 | if (!(negate ^ (i < n_char_ranges))) | |
1542 | break; | |
1543 | ||
6a140a74 | 1544 | INC_BOTH (pos, pos_byte); |
7e68b0ea RS |
1545 | } |
1546 | else | |
1547 | { | |
1548 | if (!negate) break; | |
6a140a74 | 1549 | INC_BOTH (pos, pos_byte); |
7e68b0ea RS |
1550 | } |
1551 | } | |
1552 | else | |
1553 | while (pos < XINT (lim) && fastmap[FETCH_BYTE (pos)]) | |
1554 | pos++; | |
195d1361 RS |
1555 | } |
1556 | else | |
1557 | { | |
7e68b0ea RS |
1558 | if (multibyte) |
1559 | while (pos > XINT (lim)) | |
1560 | { | |
6a140a74 RS |
1561 | int savepos = pos_byte; |
1562 | DEC_BOTH (pos, pos_byte); | |
1563 | if (fastmap[(c = FETCH_BYTE (pos_byte))]) | |
7e68b0ea RS |
1564 | { |
1565 | if (!BASE_LEADING_CODE_P (c)) | |
1566 | ; | |
1567 | else if (n_char_ranges) | |
1568 | { | |
1569 | /* We much check CHAR_RANGES for a multibyte | |
1570 | character. */ | |
6a140a74 | 1571 | ch = FETCH_MULTIBYTE_CHAR (pos_byte); |
7e68b0ea RS |
1572 | for (i = 0; i < n_char_ranges; i += 2) |
1573 | if (ch >= char_ranges[i] && ch <= char_ranges[i + 1]) | |
1574 | break; | |
1575 | if (!(negate ^ (i < n_char_ranges))) | |
1576 | { | |
6a140a74 RS |
1577 | pos++; |
1578 | pos_byte = savepos; | |
7e68b0ea RS |
1579 | break; |
1580 | } | |
1581 | } | |
1582 | else | |
1583 | if (!negate) | |
1584 | { | |
6a140a74 RS |
1585 | pos++; |
1586 | pos_byte = savepos; | |
7e68b0ea RS |
1587 | break; |
1588 | } | |
1589 | } | |
1590 | else | |
1591 | { | |
6a140a74 RS |
1592 | pos++; |
1593 | pos_byte = savepos; | |
7e68b0ea RS |
1594 | break; |
1595 | } | |
1596 | } | |
1597 | else | |
1598 | while (pos > XINT (lim) && fastmap[FETCH_BYTE (pos - 1)]) | |
1599 | pos--; | |
195d1361 RS |
1600 | } |
1601 | } | |
7e68b0ea | 1602 | |
6a140a74 RS |
1603 | #if 0 /* Not needed now that a position in mid-character |
1604 | cannot be specified in Lisp. */ | |
7e68b0ea RS |
1605 | if (multibyte |
1606 | /* INC_POS or DEC_POS might have moved POS over LIM. */ | |
1607 | && (forwardp ? (pos > XINT (lim)) : (pos < XINT (lim)))) | |
1608 | pos = XINT (lim); | |
6a140a74 | 1609 | #endif |
7e68b0ea | 1610 | |
6a140a74 RS |
1611 | if (! multibyte) |
1612 | pos_byte = pos; | |
1613 | ||
1614 | SET_PT_BOTH (pos, pos_byte); | |
195d1361 RS |
1615 | immediate_quit = 0; |
1616 | ||
1617 | return make_number (PT - start_point); | |
1618 | } | |
1619 | } | |
1620 | \f | |
95ff8dfc RS |
1621 | /* Jump over a comment, assuming we are at the beginning of one. |
1622 | FROM is the current position. | |
1623 | FROM_BYTE is the bytepos corresponding to FROM. | |
1624 | Do not move past STOP (a charpos). | |
1625 | The comment over which we have to jump is of style STYLE | |
1626 | (either SYNTAX_COMMENT_STYLE(foo) or ST_COMMENT_STYLE). | |
1627 | NESTING should be positive to indicate the nesting at the beginning | |
1628 | for nested comments and should be zero or negative else. | |
1629 | ST_COMMENT_STYLE cannot be nested. | |
1630 | PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character | |
1631 | (or 0 If the search cannot start in the middle of a two-character). | |
1632 | ||
1633 | If successful, return 1 and store the charpos of the comment's end | |
1634 | into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR. | |
1635 | Else, return 0 and store the charpos STOP into *CHARPOS_PTR, the | |
1636 | corresponding bytepos into *BYTEPOS_PTR and the current nesting | |
1637 | (as defined for state.incomment) in *INCOMMENT_PTR. | |
1638 | ||
1639 | The comment end is the last character of the comment rather than the | |
1640 | character just after the comment. | |
1641 | ||
1642 | Global syntax data is assumed to initially be valid for FROM and | |
1643 | remains valid for forward search starting at the returned position. */ | |
1644 | ||
1645 | static int | |
1646 | forw_comment (from, from_byte, stop, nesting, style, prev_syntax, | |
1647 | charpos_ptr, bytepos_ptr, incomment_ptr) | |
1648 | int from, from_byte, stop; | |
1649 | int nesting, style, prev_syntax; | |
1650 | int *charpos_ptr, *bytepos_ptr, *incomment_ptr; | |
1651 | { | |
1652 | register int c, c1; | |
1653 | register enum syntaxcode code; | |
1654 | register int syntax; | |
1655 | ||
1656 | if (nesting <= 0) nesting = -1; | |
1657 | ||
1658 | /* Enter the loop in the middle so that we find | |
1659 | a 2-char comment ender if we start in the middle of it. */ | |
1660 | syntax = prev_syntax; | |
1661 | if (syntax != 0) goto forw_incomment; | |
1662 | ||
1663 | while (1) | |
1664 | { | |
1665 | if (from == stop) | |
1666 | { | |
1667 | *incomment_ptr = nesting; | |
1668 | *charpos_ptr = from; | |
1669 | *bytepos_ptr = from_byte; | |
1670 | return 0; | |
1671 | } | |
1672 | c = FETCH_CHAR (from_byte); | |
1673 | syntax = SYNTAX_WITH_FLAGS (c); | |
1674 | code = syntax & 0xff; | |
1675 | if (code == Sendcomment | |
1676 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
1677 | && --nesting <= 0) | |
1678 | /* we have encountered a comment end of the same style | |
1679 | as the comment sequence which began this comment | |
1680 | section */ | |
1681 | break; | |
1682 | if (code == Scomment_fence | |
1683 | && style == ST_COMMENT_STYLE) | |
1684 | /* we have encountered a comment end of the same style | |
1685 | as the comment sequence which began this comment | |
1686 | section. */ | |
1687 | break; | |
1688 | if (nesting > 0 | |
1689 | && code == Scomment | |
1690 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style) | |
1691 | /* we have encountered a nested comment of the same style | |
1692 | as the comment sequence which began this comment section */ | |
1693 | nesting++; | |
1694 | INC_BOTH (from, from_byte); | |
1695 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1696 | ||
1697 | forw_incomment: | |
1698 | if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
1699 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
1700 | && (c1 = FETCH_CHAR (from_byte), | |
1701 | SYNTAX_COMEND_SECOND (c1))) | |
4ffe723b GM |
1702 | { |
1703 | if (--nesting <= 0) | |
1704 | /* we have encountered a comment end of the same style | |
1705 | as the comment sequence which began this comment | |
1706 | section */ | |
1707 | break; | |
1708 | else | |
1709 | { | |
1710 | INC_BOTH (from, from_byte); | |
1711 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1712 | } | |
1713 | } | |
95ff8dfc RS |
1714 | if (nesting > 0 |
1715 | && from < stop | |
1716 | && SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
1717 | && (c1 = FETCH_CHAR (from_byte), | |
1718 | SYNTAX_COMMENT_STYLE (c1) == style | |
1719 | && SYNTAX_COMSTART_SECOND (c1))) | |
1720 | /* we have encountered a nested comment of the same style | |
1721 | as the comment sequence which began this comment | |
1722 | section */ | |
1723 | { | |
1724 | INC_BOTH (from, from_byte); | |
1725 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1726 | nesting++; | |
1727 | } | |
1728 | } | |
1729 | *charpos_ptr = from; | |
1730 | *bytepos_ptr = from_byte; | |
1731 | return 1; | |
1732 | } | |
1733 | ||
b3cfe0c8 RS |
1734 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
1735 | "Move forward across up to N comments. If N is negative, move backward.\n\ | |
b3cfe0c8 | 1736 | Stop scanning if we find something other than a comment or whitespace.\n\ |
c81a3712 | 1737 | Set point to where scanning stops.\n\ |
b3cfe0c8 RS |
1738 | If N comments are found as expected, with nothing except whitespace\n\ |
1739 | between them, return t; otherwise return nil.") | |
1740 | (count) | |
840f481c | 1741 | Lisp_Object count; |
b3cfe0c8 RS |
1742 | { |
1743 | register int from; | |
6a140a74 | 1744 | int from_byte; |
b3cfe0c8 | 1745 | register int stop; |
8ea151b2 | 1746 | register int c, c1; |
b3cfe0c8 RS |
1747 | register enum syntaxcode code; |
1748 | int comstyle = 0; /* style of comment encountered */ | |
95ff8dfc | 1749 | int comnested = 0; /* whether the comment is nestable or not */ |
be720845 | 1750 | int found; |
840f481c | 1751 | int count1; |
6a140a74 | 1752 | int out_charpos, out_bytepos; |
95ff8dfc | 1753 | int dummy; |
840f481c RS |
1754 | |
1755 | CHECK_NUMBER (count, 0); | |
1756 | count1 = XINT (count); | |
195d1361 | 1757 | stop = count1 > 0 ? ZV : BEGV; |
b3cfe0c8 RS |
1758 | |
1759 | immediate_quit = 1; | |
1760 | QUIT; | |
1761 | ||
1762 | from = PT; | |
6a140a74 | 1763 | from_byte = PT_BYTE; |
b3cfe0c8 | 1764 | |
195d1361 | 1765 | SETUP_SYNTAX_TABLE (from, count1); |
840f481c | 1766 | while (count1 > 0) |
b3cfe0c8 | 1767 | { |
04882296 | 1768 | do |
b3cfe0c8 | 1769 | { |
f902a008 RS |
1770 | int comstart_first; |
1771 | ||
04882296 KH |
1772 | if (from == stop) |
1773 | { | |
ef316cf0 | 1774 | SET_PT_BOTH (from, from_byte); |
b7e6e612 | 1775 | immediate_quit = 0; |
04882296 KH |
1776 | return Qnil; |
1777 | } | |
6a140a74 | 1778 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 | 1779 | code = SYNTAX (c); |
f902a008 | 1780 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 1781 | comnested = SYNTAX_COMMENT_NESTED (c); |
6a140a74 | 1782 | INC_BOTH (from, from_byte); |
f902a008 | 1783 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 1784 | comstyle = 0; |
f902a008 | 1785 | if (from < stop && comstart_first |
6a140a74 | 1786 | && (c1 = FETCH_CHAR (from_byte), |
8ea151b2 | 1787 | SYNTAX_COMSTART_SECOND (c1))) |
b3cfe0c8 | 1788 | { |
7fc8191e RS |
1789 | /* We have encountered a comment start sequence and we |
1790 | are ignoring all text inside comments. We must record | |
b3cfe0c8 RS |
1791 | the comment style this sequence begins so that later, |
1792 | only a comment end of the same style actually ends | |
7fc8191e | 1793 | the comment section. */ |
b3cfe0c8 | 1794 | code = Scomment; |
8ea151b2 | 1795 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
95ff8dfc | 1796 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); |
6a140a74 | 1797 | INC_BOTH (from, from_byte); |
95ff8dfc | 1798 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 1799 | } |
1aa963c8 SM |
1800 | /* FIXME: here we ignore 2-char endcomments while we don't |
1801 | when going backwards. */ | |
04882296 KH |
1802 | } |
1803 | while (code == Swhitespace || code == Sendcomment); | |
6a140a74 | 1804 | |
da71ab91 KH |
1805 | if (code == Scomment_fence) |
1806 | comstyle = ST_COMMENT_STYLE; | |
1807 | else if (code != Scomment) | |
04882296 KH |
1808 | { |
1809 | immediate_quit = 0; | |
6a140a74 | 1810 | DEC_BOTH (from, from_byte); |
ef316cf0 | 1811 | SET_PT_BOTH (from, from_byte); |
04882296 KH |
1812 | return Qnil; |
1813 | } | |
1814 | /* We're at the start of a comment. */ | |
95ff8dfc RS |
1815 | found = forw_comment (from, from_byte, stop, comnested, comstyle, 0, |
1816 | &out_charpos, &out_bytepos, &dummy); | |
1817 | from = out_charpos; from_byte = out_bytepos; | |
1818 | if (!found) | |
04882296 | 1819 | { |
95ff8dfc RS |
1820 | immediate_quit = 0; |
1821 | SET_PT_BOTH (from, from_byte); | |
1822 | return Qnil; | |
b3cfe0c8 | 1823 | } |
95ff8dfc RS |
1824 | INC_BOTH (from, from_byte); |
1825 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
04882296 | 1826 | /* We have skipped one comment. */ |
840f481c | 1827 | count1--; |
b3cfe0c8 RS |
1828 | } |
1829 | ||
840f481c | 1830 | while (count1 < 0) |
b3cfe0c8 | 1831 | { |
b9145dbb | 1832 | while (1) |
b3cfe0c8 | 1833 | { |
f902a008 RS |
1834 | int quoted, comstart_second; |
1835 | ||
b9145dbb RS |
1836 | if (from <= stop) |
1837 | { | |
6a140a74 | 1838 | SET_PT_BOTH (BEGV, BEGV_BYTE); |
b9145dbb RS |
1839 | immediate_quit = 0; |
1840 | return Qnil; | |
1841 | } | |
b3cfe0c8 | 1842 | |
6a140a74 | 1843 | DEC_BOTH (from, from_byte); |
f902a008 | 1844 | /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */ |
6a140a74 | 1845 | quoted = char_quoted (from, from_byte); |
b3cfe0c8 | 1846 | if (quoted) |
195d1361 | 1847 | { |
6a140a74 RS |
1848 | DEC_BOTH (from, from_byte); |
1849 | goto leave; | |
195d1361 | 1850 | } |
6a140a74 | 1851 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 RS |
1852 | code = SYNTAX (c); |
1853 | comstyle = 0; | |
95ff8dfc | 1854 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
1855 | if (code == Sendcomment) |
1856 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
f902a008 | 1857 | comstart_second = SYNTAX_COMSTART_SECOND (c); |
b3cfe0c8 | 1858 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
f902a008 | 1859 | && prev_char_comend_first (from, from_byte) |
89c6809a | 1860 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
b3cfe0c8 | 1861 | { |
7fc8191e | 1862 | /* We must record the comment style encountered so that |
b3cfe0c8 | 1863 | later, we can match only the proper comment begin |
7fc8191e | 1864 | sequence of the same style. */ |
6a140a74 | 1865 | DEC_BOTH (from, from_byte); |
f902a008 RS |
1866 | code = Sendcomment; |
1867 | /* Calling char_quoted, above, set up global syntax position | |
1868 | at the new value of FROM. */ | |
95ff8dfc RS |
1869 | c1 = FETCH_CHAR (from_byte); |
1870 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
1871 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
b3cfe0c8 | 1872 | } |
f902a008 RS |
1873 | if (from > stop && comstart_second |
1874 | && prev_char_comstart_first (from, from_byte) | |
89c6809a | 1875 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
ae03af34 | 1876 | { |
ae03af34 | 1877 | code = Scomment; |
6a140a74 | 1878 | DEC_BOTH (from, from_byte); |
ae03af34 | 1879 | } |
b3cfe0c8 | 1880 | |
195d1361 RS |
1881 | if (code == Scomment_fence) |
1882 | { | |
1883 | /* Skip until first preceding unquoted comment_fence. */ | |
6a140a74 | 1884 | int found = 0, ini = from, ini_byte = from_byte; |
195d1361 | 1885 | |
6a140a74 | 1886 | while (1) |
195d1361 | 1887 | { |
6a140a74 RS |
1888 | DEC_BOTH (from, from_byte); |
1889 | if (from == stop) | |
1890 | break; | |
195d1361 | 1891 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 RS |
1892 | c = FETCH_CHAR (from_byte); |
1893 | if (SYNTAX (c) == Scomment_fence | |
1894 | && !char_quoted (from, from_byte)) | |
195d1361 RS |
1895 | { |
1896 | found = 1; | |
1897 | break; | |
1898 | } | |
1899 | } | |
1900 | if (found == 0) | |
1901 | { | |
1902 | from = ini; /* Set point to ini + 1. */ | |
6a140a74 | 1903 | from_byte = ini_byte; |
195d1361 RS |
1904 | goto leave; |
1905 | } | |
1906 | } | |
1907 | else if (code == Sendcomment) | |
b3cfe0c8 | 1908 | { |
95ff8dfc | 1909 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 1910 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
1911 | if (found == -1) |
1912 | { | |
2b927d02 SM |
1913 | #if 0 /* cc-mode (and maybe others) relies on the bogus behavior. */ |
1914 | /* Failure: we should go back to the end of this | |
1aa963c8 SM |
1915 | not-quite-endcomment. */ |
1916 | if (SYNTAX(c) != code) | |
1917 | /* It was a two-char Sendcomment. */ | |
1918 | INC_BOTH (from, from_byte); | |
1919 | goto leave; | |
2b927d02 | 1920 | #endif |
1aa963c8 | 1921 | } |
2b927d02 SM |
1922 | else |
1923 | /* We have skipped one comment. */ | |
1924 | from = out_charpos, from_byte = out_bytepos; | |
1925 | break; | |
b3cfe0c8 | 1926 | } |
195d1361 | 1927 | else if (code != Swhitespace && code != Scomment) |
b3cfe0c8 | 1928 | { |
195d1361 | 1929 | leave: |
b3cfe0c8 | 1930 | immediate_quit = 0; |
6a140a74 | 1931 | INC_BOTH (from, from_byte); |
ef316cf0 | 1932 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
1933 | return Qnil; |
1934 | } | |
1935 | } | |
1936 | ||
840f481c | 1937 | count1++; |
b3cfe0c8 RS |
1938 | } |
1939 | ||
ef316cf0 | 1940 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
1941 | immediate_quit = 0; |
1942 | return Qt; | |
1943 | } | |
1944 | \f | |
6a140a74 | 1945 | static Lisp_Object |
8489eb67 RS |
1946 | scan_lists (from, count, depth, sexpflag) |
1947 | register int from; | |
1948 | int count, depth, sexpflag; | |
1949 | { | |
1950 | Lisp_Object val; | |
195d1361 | 1951 | register int stop = count > 0 ? ZV : BEGV; |
93da5fff KH |
1952 | register int c, c1; |
1953 | int stringterm; | |
8489eb67 RS |
1954 | int quoted; |
1955 | int mathexit = 0; | |
93da5fff | 1956 | register enum syntaxcode code, temp_code; |
195d1361 | 1957 | int min_depth = depth; /* Err out if depth gets less than this. */ |
e5d4f4dc | 1958 | int comstyle = 0; /* style of comment encountered */ |
95ff8dfc | 1959 | int comnested = 0; /* whether the comment is nestable or not */ |
93da5fff | 1960 | int temp_pos; |
7bf5e9e4 | 1961 | int last_good = from; |
195d1361 | 1962 | int found; |
c3907a7e | 1963 | int from_byte; |
6a140a74 | 1964 | int out_bytepos, out_charpos; |
95ff8dfc | 1965 | int temp, dummy; |
8489eb67 RS |
1966 | |
1967 | if (depth > 0) min_depth = 0; | |
1968 | ||
c3907a7e RS |
1969 | if (from > ZV) from = ZV; |
1970 | if (from < BEGV) from = BEGV; | |
1971 | ||
1972 | from_byte = CHAR_TO_BYTE (from); | |
1973 | ||
8489eb67 RS |
1974 | immediate_quit = 1; |
1975 | QUIT; | |
1976 | ||
195d1361 | 1977 | SETUP_SYNTAX_TABLE (from, count); |
8489eb67 RS |
1978 | while (count > 0) |
1979 | { | |
8489eb67 RS |
1980 | while (from < stop) |
1981 | { | |
f902a008 | 1982 | int comstart_first, prefix; |
195d1361 | 1983 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1984 | c = FETCH_CHAR (from_byte); |
e5d4f4dc | 1985 | code = SYNTAX (c); |
f902a008 | 1986 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 1987 | comnested = SYNTAX_COMMENT_NESTED (c); |
f902a008 | 1988 | prefix = SYNTAX_PREFIX (c); |
7bf5e9e4 RS |
1989 | if (depth == min_depth) |
1990 | last_good = from; | |
6a140a74 | 1991 | INC_BOTH (from, from_byte); |
195d1361 | 1992 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 1993 | if (from < stop && comstart_first |
6a140a74 | 1994 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from_byte)) |
8489eb67 | 1995 | && parse_sexp_ignore_comments) |
e5d4f4dc RS |
1996 | { |
1997 | /* we have encountered a comment start sequence and we | |
195d1361 | 1998 | are ignoring all text inside comments. We must record |
e5d4f4dc RS |
1999 | the comment style this sequence begins so that later, |
2000 | only a comment end of the same style actually ends | |
2001 | the comment section */ | |
2002 | code = Scomment; | |
95ff8dfc RS |
2003 | c1 = FETCH_CHAR (from_byte); |
2004 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
2005 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
6a140a74 | 2006 | INC_BOTH (from, from_byte); |
f902a008 | 2007 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
e5d4f4dc RS |
2008 | } |
2009 | ||
f902a008 | 2010 | if (prefix) |
8489eb67 RS |
2011 | continue; |
2012 | ||
0220c518 | 2013 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2014 | { |
2015 | case Sescape: | |
2016 | case Scharquote: | |
2017 | if (from == stop) goto lose; | |
6a140a74 | 2018 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2019 | /* treat following character as a word constituent */ |
2020 | case Sword: | |
2021 | case Ssymbol: | |
2022 | if (depth || !sexpflag) break; | |
195d1361 | 2023 | /* This word counts as a sexp; return at end of it. */ |
8489eb67 RS |
2024 | while (from < stop) |
2025 | { | |
195d1361 | 2026 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
7c7ca3d2 RS |
2027 | |
2028 | /* Some compilers can't handle this inside the switch. */ | |
2029 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2030 | switch (temp) | |
8489eb67 RS |
2031 | { |
2032 | case Scharquote: | |
2033 | case Sescape: | |
6a140a74 | 2034 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2035 | if (from == stop) goto lose; |
2036 | break; | |
2037 | case Sword: | |
2038 | case Ssymbol: | |
2039 | case Squote: | |
2040 | break; | |
2041 | default: | |
2042 | goto done; | |
2043 | } | |
6a140a74 | 2044 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2045 | } |
2046 | goto done; | |
2047 | ||
195d1361 | 2048 | case Scomment_fence: |
95ff8dfc RS |
2049 | comstyle = ST_COMMENT_STYLE; |
2050 | /* FALLTHROUGH */ | |
2051 | case Scomment: | |
8489eb67 | 2052 | if (!parse_sexp_ignore_comments) break; |
95ff8dfc RS |
2053 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2054 | found = forw_comment (from, from_byte, stop, | |
2055 | comnested, comstyle, 0, | |
2056 | &out_charpos, &out_bytepos, &dummy); | |
2057 | from = out_charpos, from_byte = out_bytepos; | |
2058 | if (!found) | |
8489eb67 | 2059 | { |
95ff8dfc RS |
2060 | if (depth == 0) |
2061 | goto done; | |
2062 | goto lose; | |
8489eb67 | 2063 | } |
95ff8dfc RS |
2064 | INC_BOTH (from, from_byte); |
2065 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
8489eb67 RS |
2066 | break; |
2067 | ||
2068 | case Smath: | |
2069 | if (!sexpflag) | |
2070 | break; | |
6a140a74 RS |
2071 | if (from != stop && c == FETCH_CHAR (from_byte)) |
2072 | { | |
2073 | INC_BOTH (from, from_byte); | |
2074 | } | |
8489eb67 RS |
2075 | if (mathexit) |
2076 | { | |
2077 | mathexit = 0; | |
2078 | goto close1; | |
2079 | } | |
2080 | mathexit = 1; | |
2081 | ||
2082 | case Sopen: | |
2083 | if (!++depth) goto done; | |
2084 | break; | |
2085 | ||
2086 | case Sclose: | |
2087 | close1: | |
2088 | if (!--depth) goto done; | |
2089 | if (depth < min_depth) | |
7bf5e9e4 RS |
2090 | Fsignal (Qscan_error, |
2091 | Fcons (build_string ("Containing expression ends prematurely"), | |
2092 | Fcons (make_number (last_good), | |
2093 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2094 | break; |
2095 | ||
2096 | case Sstring: | |
195d1361 | 2097 | case Sstring_fence: |
ef316cf0 | 2098 | temp_pos = dec_bytepos (from_byte); |
93da5fff | 2099 | stringterm = FETCH_CHAR (temp_pos); |
8489eb67 RS |
2100 | while (1) |
2101 | { | |
2102 | if (from >= stop) goto lose; | |
195d1361 RS |
2103 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2104 | if (code == Sstring | |
6a140a74 RS |
2105 | ? (FETCH_CHAR (from_byte) == stringterm) |
2106 | : SYNTAX (FETCH_CHAR (from_byte)) == Sstring_fence) | |
195d1361 | 2107 | break; |
7c7ca3d2 RS |
2108 | |
2109 | /* Some compilers can't handle this inside the switch. */ | |
2110 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2111 | switch (temp) | |
8489eb67 RS |
2112 | { |
2113 | case Scharquote: | |
2114 | case Sescape: | |
6a140a74 | 2115 | INC_BOTH (from, from_byte); |
8489eb67 | 2116 | } |
6a140a74 | 2117 | INC_BOTH (from, from_byte); |
8489eb67 | 2118 | } |
6a140a74 | 2119 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2120 | if (!depth && sexpflag) goto done; |
2121 | break; | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | /* Reached end of buffer. Error if within object, return nil if between */ | |
2126 | if (depth) goto lose; | |
2127 | ||
2128 | immediate_quit = 0; | |
2129 | return Qnil; | |
2130 | ||
2131 | /* End of object reached */ | |
2132 | done: | |
2133 | count--; | |
2134 | } | |
2135 | ||
2136 | while (count < 0) | |
2137 | { | |
8489eb67 RS |
2138 | while (from > stop) |
2139 | { | |
6a140a74 | 2140 | DEC_BOTH (from, from_byte); |
195d1361 | 2141 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 2142 | c = FETCH_CHAR (from_byte); |
8489eb67 | 2143 | code = SYNTAX (c); |
7bf5e9e4 RS |
2144 | if (depth == min_depth) |
2145 | last_good = from; | |
7fc8191e | 2146 | comstyle = 0; |
95ff8dfc | 2147 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2148 | if (code == Sendcomment) |
2149 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 | 2150 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1674d9a2 | 2151 | && prev_char_comend_first (from, from_byte) |
8489eb67 | 2152 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2153 | { |
f902a008 | 2154 | /* We must record the comment style encountered so that |
e5d4f4dc | 2155 | later, we can match only the proper comment begin |
f902a008 | 2156 | sequence of the same style. */ |
6a140a74 | 2157 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2158 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
2159 | code = Sendcomment; | |
95ff8dfc RS |
2160 | c1 = FETCH_CHAR (from_byte); |
2161 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
2162 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
e5d4f4dc RS |
2163 | } |
2164 | ||
9828a477 | 2165 | /* Quoting turns anything except a comment-ender |
f902a008 RS |
2166 | into a word character. Note that this if cannot be true |
2167 | if we decremented FROM in the if-statement above. */ | |
9828a477 KH |
2168 | if (code != Sendcomment && char_quoted (from, from_byte)) |
2169 | code = Sword; | |
2170 | else if (SYNTAX_PREFIX (c)) | |
8489eb67 RS |
2171 | continue; |
2172 | ||
9828a477 | 2173 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2174 | { |
2175 | case Sword: | |
2176 | case Ssymbol: | |
9828a477 KH |
2177 | case Sescape: |
2178 | case Scharquote: | |
8489eb67 | 2179 | if (depth || !sexpflag) break; |
195d1361 RS |
2180 | /* This word counts as a sexp; count object finished |
2181 | after passing it. */ | |
8489eb67 RS |
2182 | while (from > stop) |
2183 | { | |
6a140a74 | 2184 | temp_pos = from_byte; |
ef316cf0 RS |
2185 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2186 | DEC_POS (temp_pos); | |
2187 | else | |
2188 | temp_pos--; | |
6a140a74 | 2189 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
9828a477 KH |
2190 | c1 = FETCH_CHAR (temp_pos); |
2191 | temp_code = SYNTAX (c1); | |
2192 | /* Don't allow comment-end to be quoted. */ | |
2193 | if (temp_code == Sendcomment) | |
2194 | goto done2; | |
6a140a74 | 2195 | quoted = char_quoted (from - 1, temp_pos); |
8489eb67 | 2196 | if (quoted) |
93da5fff | 2197 | { |
6a140a74 | 2198 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2199 | temp_pos = dec_bytepos (temp_pos); |
6a140a74 | 2200 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff KH |
2201 | } |
2202 | c1 = FETCH_CHAR (temp_pos); | |
2203 | temp_code = SYNTAX (c1); | |
2204 | if (! (quoted || temp_code == Sword | |
2205 | || temp_code == Ssymbol | |
2206 | || temp_code == Squote)) | |
8489eb67 | 2207 | goto done2; |
6a140a74 | 2208 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2209 | } |
2210 | goto done2; | |
2211 | ||
2212 | case Smath: | |
2213 | if (!sexpflag) | |
2214 | break; | |
ef316cf0 | 2215 | temp_pos = dec_bytepos (from_byte); |
6a140a74 | 2216 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff | 2217 | if (from != stop && c == FETCH_CHAR (temp_pos)) |
6a140a74 | 2218 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2219 | if (mathexit) |
2220 | { | |
2221 | mathexit = 0; | |
2222 | goto open2; | |
2223 | } | |
2224 | mathexit = 1; | |
2225 | ||
2226 | case Sclose: | |
2227 | if (!++depth) goto done2; | |
2228 | break; | |
2229 | ||
2230 | case Sopen: | |
2231 | open2: | |
2232 | if (!--depth) goto done2; | |
2233 | if (depth < min_depth) | |
7bf5e9e4 RS |
2234 | Fsignal (Qscan_error, |
2235 | Fcons (build_string ("Containing expression ends prematurely"), | |
2236 | Fcons (make_number (last_good), | |
2237 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2238 | break; |
2239 | ||
2240 | case Sendcomment: | |
2241 | if (!parse_sexp_ignore_comments) | |
2242 | break; | |
95ff8dfc | 2243 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2244 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2245 | /* FIXME: if found == -1, then it really wasn't a comment-end. |
2246 | For single-char Sendcomment, we can't do much about it apart | |
2247 | from skipping the char. | |
2248 | For 2-char endcomments, we could try again, taking both | |
2249 | chars as separate entities, but it's a lot of trouble | |
2250 | for very little gain, so we don't bother either. -sm */ | |
6a140a74 RS |
2251 | if (found != -1) |
2252 | from = out_charpos, from_byte = out_bytepos; | |
8489eb67 RS |
2253 | break; |
2254 | ||
195d1361 RS |
2255 | case Scomment_fence: |
2256 | case Sstring_fence: | |
2257 | while (1) | |
2258 | { | |
6a140a74 | 2259 | DEC_BOTH (from, from_byte); |
195d1361 RS |
2260 | if (from == stop) goto lose; |
2261 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
6a140a74 RS |
2262 | if (!char_quoted (from, from_byte) |
2263 | && SYNTAX (FETCH_CHAR (from_byte)) == code) | |
195d1361 RS |
2264 | break; |
2265 | } | |
2266 | if (code == Sstring_fence && !depth && sexpflag) goto done2; | |
2267 | break; | |
2268 | ||
8489eb67 | 2269 | case Sstring: |
6a140a74 | 2270 | stringterm = FETCH_CHAR (from_byte); |
8489eb67 RS |
2271 | while (1) |
2272 | { | |
2273 | if (from == stop) goto lose; | |
6a140a74 | 2274 | temp_pos = from_byte; |
ef316cf0 RS |
2275 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2276 | DEC_POS (temp_pos); | |
2277 | else | |
2278 | temp_pos--; | |
6a140a74 RS |
2279 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
2280 | if (!char_quoted (from - 1, temp_pos) | |
93da5fff | 2281 | && stringterm == FETCH_CHAR (temp_pos)) |
8489eb67 | 2282 | break; |
6a140a74 | 2283 | DEC_BOTH (from, from_byte); |
8489eb67 | 2284 | } |
6a140a74 | 2285 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2286 | if (!depth && sexpflag) goto done2; |
2287 | break; | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | /* Reached start of buffer. Error if within object, return nil if between */ | |
2292 | if (depth) goto lose; | |
2293 | ||
2294 | immediate_quit = 0; | |
2295 | return Qnil; | |
2296 | ||
2297 | done2: | |
2298 | count++; | |
2299 | } | |
2300 | ||
2301 | ||
2302 | immediate_quit = 0; | |
1e142fb7 | 2303 | XSETFASTINT (val, from); |
8489eb67 RS |
2304 | return val; |
2305 | ||
2306 | lose: | |
7bf5e9e4 RS |
2307 | Fsignal (Qscan_error, |
2308 | Fcons (build_string ("Unbalanced parentheses"), | |
2309 | Fcons (make_number (last_good), | |
2310 | Fcons (make_number (from), Qnil)))); | |
2311 | ||
8489eb67 RS |
2312 | /* NOTREACHED */ |
2313 | } | |
2314 | ||
8489eb67 RS |
2315 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, |
2316 | "Scan from character number FROM by COUNT lists.\n\ | |
2317 | Returns the character number of the position thus found.\n\ | |
2318 | \n\ | |
2319 | If DEPTH is nonzero, paren depth begins counting from that value,\n\ | |
2320 | only places where the depth in parentheses becomes zero\n\ | |
2321 | are candidates for stopping; COUNT such places are counted.\n\ | |
2322 | Thus, a positive value for DEPTH means go out levels.\n\ | |
2323 | \n\ | |
2324 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
2325 | \n\ | |
2326 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
2327 | and the depth is wrong, an error is signaled.\n\ | |
2328 | If the depth is right but the count is not used up, nil is returned.") | |
2329 | (from, count, depth) | |
2330 | Lisp_Object from, count, depth; | |
2331 | { | |
2332 | CHECK_NUMBER (from, 0); | |
2333 | CHECK_NUMBER (count, 1); | |
2334 | CHECK_NUMBER (depth, 2); | |
2335 | ||
2336 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
2337 | } | |
2338 | ||
2339 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
2340 | "Scan from character number FROM by COUNT balanced expressions.\n\ | |
2341 | If COUNT is negative, scan backwards.\n\ | |
2342 | Returns the character number of the position thus found.\n\ | |
2343 | \n\ | |
2344 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
2345 | \n\ | |
2346 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
2347 | in the middle of a parenthetical grouping, an error is signaled.\n\ | |
2348 | If the beginning or end is reached between groupings\n\ | |
2349 | but before count is used up, nil is returned.") | |
2350 | (from, count) | |
2351 | Lisp_Object from, count; | |
2352 | { | |
2353 | CHECK_NUMBER (from, 0); | |
2354 | CHECK_NUMBER (count, 1); | |
2355 | ||
2356 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
2357 | } | |
2358 | ||
2359 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
2360 | 0, 0, 0, | |
2361 | "Move point backward over any number of chars with prefix syntax.\n\ | |
2362 | This includes chars with \"quote\" or \"prefix\" syntax (' or p).") | |
2363 | () | |
2364 | { | |
2365 | int beg = BEGV; | |
6a140a74 RS |
2366 | int opoint = PT; |
2367 | int opoint_byte = PT_BYTE; | |
6ec8bbd2 | 2368 | int pos = PT; |
6a140a74 | 2369 | int pos_byte = PT_BYTE; |
93da5fff | 2370 | int c; |
93da5fff | 2371 | |
f902a008 | 2372 | if (pos <= beg) |
195d1361 | 2373 | { |
f902a008 RS |
2374 | SET_PT_BOTH (opoint, opoint_byte); |
2375 | ||
2376 | return Qnil; | |
195d1361 | 2377 | } |
8489eb67 | 2378 | |
f902a008 RS |
2379 | SETUP_SYNTAX_TABLE (pos, -1); |
2380 | ||
6a140a74 RS |
2381 | DEC_BOTH (pos, pos_byte); |
2382 | ||
1fd3172d | 2383 | while (!char_quoted (pos, pos_byte) |
195d1361 | 2384 | /* Previous statement updates syntax table. */ |
6a140a74 | 2385 | && ((c = FETCH_CHAR (pos_byte), SYNTAX (c) == Squote) |
93da5fff KH |
2386 | || SYNTAX_PREFIX (c))) |
2387 | { | |
1fd3172d RS |
2388 | opoint = pos; |
2389 | opoint_byte = pos_byte; | |
2390 | ||
2391 | if (pos + 1 > beg) | |
2392 | DEC_BOTH (pos, pos_byte); | |
93da5fff | 2393 | } |
8489eb67 | 2394 | |
6a140a74 | 2395 | SET_PT_BOTH (opoint, opoint_byte); |
8489eb67 RS |
2396 | |
2397 | return Qnil; | |
2398 | } | |
2399 | \f | |
6a140a74 | 2400 | /* Parse forward from FROM / FROM_BYTE to END, |
e5d4f4dc RS |
2401 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
2402 | and return a description of the state of the parse at END. | |
c81a3712 | 2403 | If STOPBEFORE is nonzero, stop at the start of an atom. |
644ea4df RS |
2404 | If COMMENTSTOP is 1, stop at the start of a comment. |
2405 | If COMMENTSTOP is -1, stop at the start or end of a comment, | |
2406 | after the beginning of a string, or after the end of a string. */ | |
8489eb67 | 2407 | |
340f92b5 | 2408 | static void |
6a140a74 | 2409 | scan_sexps_forward (stateptr, from, from_byte, end, targetdepth, |
c81a3712 | 2410 | stopbefore, oldstate, commentstop) |
e5d4f4dc | 2411 | struct lisp_parse_state *stateptr; |
8489eb67 RS |
2412 | register int from; |
2413 | int end, targetdepth, stopbefore; | |
2414 | Lisp_Object oldstate; | |
c81a3712 | 2415 | int commentstop; |
8489eb67 RS |
2416 | { |
2417 | struct lisp_parse_state state; | |
2418 | ||
2419 | register enum syntaxcode code; | |
95ff8dfc RS |
2420 | int c1; |
2421 | int comnested; | |
8489eb67 RS |
2422 | struct level { int last, prev; }; |
2423 | struct level levelstart[100]; | |
2424 | register struct level *curlevel = levelstart; | |
2425 | struct level *endlevel = levelstart + 100; | |
8489eb67 RS |
2426 | register int depth; /* Paren depth of current scanning location. |
2427 | level - levelstart equals this except | |
2428 | when the depth becomes negative. */ | |
2429 | int mindepth; /* Lowest DEPTH value seen. */ | |
2430 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
2431 | Lisp_Object tem; | |
93da5fff | 2432 | int prev_from; /* Keep one character before FROM. */ |
6a140a74 | 2433 | int prev_from_byte; |
1fd3172d | 2434 | int prev_from_syntax; |
195d1361 RS |
2435 | int boundary_stop = commentstop == -1; |
2436 | int nofence; | |
95ff8dfc RS |
2437 | int found; |
2438 | int out_bytepos, out_charpos; | |
7c7ca3d2 | 2439 | int temp; |
93da5fff KH |
2440 | |
2441 | prev_from = from; | |
6a140a74 RS |
2442 | prev_from_byte = from_byte; |
2443 | if (from != BEGV) | |
2444 | DEC_BOTH (prev_from, prev_from_byte); | |
93da5fff KH |
2445 | |
2446 | /* Use this macro instead of `from++'. */ | |
6a140a74 RS |
2447 | #define INC_FROM \ |
2448 | do { prev_from = from; \ | |
2449 | prev_from_byte = from_byte; \ | |
1fd3172d RS |
2450 | prev_from_syntax \ |
2451 | = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); \ | |
ef316cf0 | 2452 | INC_BOTH (from, from_byte); \ |
1fd3172d | 2453 | UPDATE_SYNTAX_TABLE_FORWARD (from); \ |
6a140a74 | 2454 | } while (0) |
8489eb67 RS |
2455 | |
2456 | immediate_quit = 1; | |
2457 | QUIT; | |
2458 | ||
265a9e55 | 2459 | if (NILP (oldstate)) |
8489eb67 RS |
2460 | { |
2461 | depth = 0; | |
2462 | state.instring = -1; | |
2463 | state.incomment = 0; | |
195d1361 RS |
2464 | state.comstyle = 0; /* comment style a by default. */ |
2465 | state.comstr_start = -1; /* no comment/string seen. */ | |
8489eb67 RS |
2466 | } |
2467 | else | |
2468 | { | |
2469 | tem = Fcar (oldstate); | |
265a9e55 | 2470 | if (!NILP (tem)) |
8489eb67 RS |
2471 | depth = XINT (tem); |
2472 | else | |
2473 | depth = 0; | |
2474 | ||
2475 | oldstate = Fcdr (oldstate); | |
2476 | oldstate = Fcdr (oldstate); | |
2477 | oldstate = Fcdr (oldstate); | |
2478 | tem = Fcar (oldstate); | |
195d1361 | 2479 | /* Check whether we are inside string_fence-style string: */ |
e76f1c44 GM |
2480 | state.instring = (!NILP (tem) |
2481 | ? (INTEGERP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
2482 | : -1); | |
8489eb67 RS |
2483 | |
2484 | oldstate = Fcdr (oldstate); | |
2485 | tem = Fcar (oldstate); | |
e76f1c44 GM |
2486 | state.incomment = (!NILP (tem) |
2487 | ? (INTEGERP (tem) ? XINT (tem) : -1) | |
95ff8dfc | 2488 | : 0); |
8489eb67 RS |
2489 | |
2490 | oldstate = Fcdr (oldstate); | |
2491 | tem = Fcar (oldstate); | |
265a9e55 | 2492 | start_quoted = !NILP (tem); |
e5d4f4dc | 2493 | |
95ff8dfc | 2494 | /* if the eighth element of the list is nil, we are in comment |
195d1361 RS |
2495 | style a. If it is non-nil, we are in comment style b */ |
2496 | oldstate = Fcdr (oldstate); | |
e5d4f4dc | 2497 | oldstate = Fcdr (oldstate); |
195d1361 | 2498 | tem = Fcar (oldstate); |
e76f1c44 GM |
2499 | state.comstyle = NILP (tem) ? 0 : (EQ (tem, Qsyntax_table) |
2500 | ? ST_COMMENT_STYLE : 1); | |
195d1361 | 2501 | |
e5d4f4dc | 2502 | oldstate = Fcdr (oldstate); |
e5d4f4dc | 2503 | tem = Fcar (oldstate); |
195d1361 | 2504 | state.comstr_start = NILP (tem) ? -1 : XINT (tem) ; |
1a102a58 RS |
2505 | oldstate = Fcdr (oldstate); |
2506 | tem = Fcar (oldstate); | |
2507 | while (!NILP (tem)) /* >= second enclosing sexps. */ | |
2508 | { | |
2509 | /* curlevel++->last ran into compiler bug on Apollo */ | |
2510 | curlevel->last = XINT (Fcar (tem)); | |
2511 | if (++curlevel == endlevel) | |
2512 | error ("Nesting too deep for parser"); | |
2513 | curlevel->prev = -1; | |
2514 | curlevel->last = -1; | |
2515 | tem = Fcdr (tem); | |
2516 | } | |
8489eb67 RS |
2517 | } |
2518 | state.quoted = 0; | |
2519 | mindepth = depth; | |
2520 | ||
2521 | curlevel->prev = -1; | |
2522 | curlevel->last = -1; | |
2523 | ||
326b283b RS |
2524 | SETUP_SYNTAX_TABLE (prev_from, 1); |
2525 | prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); | |
2526 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2527 | ||
195d1361 | 2528 | /* Enter the loop at a place appropriate for initial state. */ |
8489eb67 | 2529 | |
326b283b RS |
2530 | if (state.incomment) |
2531 | goto startincomment; | |
8489eb67 RS |
2532 | if (state.instring >= 0) |
2533 | { | |
195d1361 | 2534 | nofence = state.instring != ST_STRING_STYLE; |
326b283b RS |
2535 | if (start_quoted) |
2536 | goto startquotedinstring; | |
8489eb67 RS |
2537 | goto startinstring; |
2538 | } | |
326b283b RS |
2539 | else if (start_quoted) |
2540 | goto startquoted; | |
1fd3172d | 2541 | |
ccf89641 | 2542 | #if 0 /* This seems to be redundant with the identical code above. */ |
1fd3172d RS |
2543 | SETUP_SYNTAX_TABLE (prev_from, 1); |
2544 | prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); | |
2545 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
ccf89641 | 2546 | #endif |
1fd3172d | 2547 | |
8489eb67 RS |
2548 | while (from < end) |
2549 | { | |
93da5fff | 2550 | INC_FROM; |
1fd3172d | 2551 | code = prev_from_syntax & 0xff; |
4c920633 | 2552 | |
8f9dc2ed | 2553 | if (code == Scomment) |
95ff8dfc RS |
2554 | { |
2555 | state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ? | |
2556 | 1 : -1); | |
2557 | state.comstr_start = prev_from; | |
2558 | } | |
4c920633 | 2559 | else if (code == Scomment_fence) |
e5d4f4dc RS |
2560 | { |
2561 | /* Record the comment style we have entered so that only | |
2562 | the comment-end sequence of the same style actually | |
2563 | terminates the comment section. */ | |
95ff8dfc RS |
2564 | state.comstyle = ST_COMMENT_STYLE; |
2565 | state.incomment = -1; | |
195d1361 | 2566 | state.comstr_start = prev_from; |
e5d4f4dc | 2567 | code = Scomment; |
e5d4f4dc | 2568 | } |
4c920633 | 2569 | else if (from < end) |
1fd3172d | 2570 | if (SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax)) |
95ff8dfc RS |
2571 | if (c1 = FETCH_CHAR (from_byte), |
2572 | SYNTAX_COMSTART_SECOND (c1)) | |
1fd3172d | 2573 | /* Duplicate code to avoid a complex if-expression |
4c920633 RS |
2574 | which causes trouble for the SGI compiler. */ |
2575 | { | |
2576 | /* Record the comment style we have entered so that only | |
2577 | the comment-end sequence of the same style actually | |
2578 | terminates the comment section. */ | |
95ff8dfc RS |
2579 | state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte)); |
2580 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax); | |
2581 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
2582 | state.incomment = comnested ? 1 : -1; | |
4c920633 | 2583 | state.comstr_start = prev_from; |
95ff8dfc | 2584 | INC_FROM; |
4c920633 RS |
2585 | code = Scomment; |
2586 | } | |
e5d4f4dc | 2587 | |
1fd3172d | 2588 | if (SYNTAX_FLAGS_PREFIX (prev_from_syntax)) |
8489eb67 | 2589 | continue; |
0220c518 | 2590 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2591 | { |
2592 | case Sescape: | |
2593 | case Scharquote: | |
2594 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2595 | curlevel->last = prev_from; |
8489eb67 RS |
2596 | startquoted: |
2597 | if (from == end) goto endquoted; | |
93da5fff | 2598 | INC_FROM; |
8489eb67 RS |
2599 | goto symstarted; |
2600 | /* treat following character as a word constituent */ | |
2601 | case Sword: | |
2602 | case Ssymbol: | |
2603 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2604 | curlevel->last = prev_from; |
8489eb67 RS |
2605 | symstarted: |
2606 | while (from < end) | |
2607 | { | |
7c7ca3d2 RS |
2608 | /* Some compilers can't handle this inside the switch. */ |
2609 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2610 | switch (temp) | |
8489eb67 RS |
2611 | { |
2612 | case Scharquote: | |
2613 | case Sescape: | |
93da5fff | 2614 | INC_FROM; |
8489eb67 RS |
2615 | if (from == end) goto endquoted; |
2616 | break; | |
2617 | case Sword: | |
2618 | case Ssymbol: | |
2619 | case Squote: | |
2620 | break; | |
2621 | default: | |
2622 | goto symdone; | |
2623 | } | |
93da5fff | 2624 | INC_FROM; |
8489eb67 RS |
2625 | } |
2626 | symdone: | |
2627 | curlevel->prev = curlevel->last; | |
2628 | break; | |
2629 | ||
5a28e48c | 2630 | startincomment: |
195d1361 | 2631 | if (commentstop == 1) |
5a28e48c | 2632 | goto done; |
195d1361 | 2633 | goto commentloop; |
5a28e48c | 2634 | |
8489eb67 | 2635 | case Scomment: |
ca9c0567 PE |
2636 | if (! state.incomment) |
2637 | abort (); | |
195d1361 RS |
2638 | if (commentstop || boundary_stop) goto done; |
2639 | commentloop: | |
95ff8dfc RS |
2640 | /* The (from == BEGV) test is to enter the loop in the middle so |
2641 | that we find a 2-char comment ender even if we start in the | |
2642 | middle of it. */ | |
2643 | found = forw_comment (from, from_byte, end, | |
2644 | state.incomment, state.comstyle, | |
2645 | (from == BEGV) ? 0 : prev_from_syntax, | |
2646 | &out_charpos, &out_bytepos, &state.incomment); | |
2647 | from = out_charpos; from_byte = out_bytepos; | |
2648 | /* Beware! prev_from and friends are invalid now. | |
2649 | Luckily, the `done' doesn't use them and the INC_FROM | |
2650 | sets them to a sane value without looking at them. */ | |
2651 | if (!found) goto done; | |
195d1361 | 2652 | INC_FROM; |
8489eb67 | 2653 | state.incomment = 0; |
e5d4f4dc | 2654 | state.comstyle = 0; /* reset the comment style */ |
195d1361 | 2655 | if (boundary_stop) goto done; |
8489eb67 RS |
2656 | break; |
2657 | ||
2658 | case Sopen: | |
2659 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
2660 | depth++; | |
2661 | /* curlevel++->last ran into compiler bug on Apollo */ | |
93da5fff | 2662 | curlevel->last = prev_from; |
8489eb67 RS |
2663 | if (++curlevel == endlevel) |
2664 | error ("Nesting too deep for parser"); | |
2665 | curlevel->prev = -1; | |
2666 | curlevel->last = -1; | |
30844415 | 2667 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2668 | break; |
2669 | ||
2670 | case Sclose: | |
2671 | depth--; | |
2672 | if (depth < mindepth) | |
2673 | mindepth = depth; | |
2674 | if (curlevel != levelstart) | |
2675 | curlevel--; | |
2676 | curlevel->prev = curlevel->last; | |
30844415 | 2677 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2678 | break; |
2679 | ||
2680 | case Sstring: | |
195d1361 RS |
2681 | case Sstring_fence: |
2682 | state.comstr_start = from - 1; | |
8489eb67 | 2683 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
93da5fff | 2684 | curlevel->last = prev_from; |
195d1361 | 2685 | state.instring = (code == Sstring |
6a140a74 | 2686 | ? (FETCH_CHAR (prev_from_byte)) |
195d1361 RS |
2687 | : ST_STRING_STYLE); |
2688 | if (boundary_stop) goto done; | |
8489eb67 | 2689 | startinstring: |
195d1361 | 2690 | { |
644ea4df | 2691 | nofence = state.instring != ST_STRING_STYLE; |
195d1361 | 2692 | |
644ea4df RS |
2693 | while (1) |
2694 | { | |
2695 | int c; | |
195d1361 | 2696 | |
644ea4df | 2697 | if (from >= end) goto done; |
6a140a74 | 2698 | c = FETCH_CHAR (from_byte); |
7c7ca3d2 RS |
2699 | /* Some compilers can't handle this inside the switch. */ |
2700 | temp = SYNTAX (c); | |
ccf89641 KH |
2701 | |
2702 | /* Check TEMP here so that if the char has | |
2703 | a syntax-table property which says it is NOT | |
2704 | a string character, it does not end the string. */ | |
2705 | if (nofence && c == state.instring && temp == Sstring) | |
2706 | break; | |
2707 | ||
7c7ca3d2 | 2708 | switch (temp) |
644ea4df RS |
2709 | { |
2710 | case Sstring_fence: | |
2711 | if (!nofence) goto string_end; | |
2712 | break; | |
2713 | case Scharquote: | |
2714 | case Sescape: | |
2715 | INC_FROM; | |
2716 | startquotedinstring: | |
2717 | if (from >= end) goto endquoted; | |
195d1361 | 2718 | } |
644ea4df RS |
2719 | INC_FROM; |
2720 | } | |
195d1361 RS |
2721 | } |
2722 | string_end: | |
8489eb67 RS |
2723 | state.instring = -1; |
2724 | curlevel->prev = curlevel->last; | |
93da5fff | 2725 | INC_FROM; |
195d1361 | 2726 | if (boundary_stop) goto done; |
8489eb67 RS |
2727 | break; |
2728 | ||
2729 | case Smath: | |
2730 | break; | |
2731 | } | |
2732 | } | |
2733 | goto done; | |
2734 | ||
2735 | stop: /* Here if stopping before start of sexp. */ | |
93da5fff | 2736 | from = prev_from; /* We have just fetched the char that starts it; */ |
8489eb67 RS |
2737 | goto done; /* but return the position before it. */ |
2738 | ||
2739 | endquoted: | |
2740 | state.quoted = 1; | |
2741 | done: | |
2742 | state.depth = depth; | |
2743 | state.mindepth = mindepth; | |
2744 | state.thislevelstart = curlevel->prev; | |
2745 | state.prevlevelstart | |
2746 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
2747 | state.location = from; | |
1a102a58 RS |
2748 | state.levelstarts = Qnil; |
2749 | while (--curlevel >= levelstart) | |
2750 | state.levelstarts = Fcons (make_number (curlevel->last), | |
2751 | state.levelstarts); | |
8489eb67 RS |
2752 | immediate_quit = 0; |
2753 | ||
e5d4f4dc | 2754 | *stateptr = state; |
8489eb67 RS |
2755 | } |
2756 | ||
2757 | /* This comment supplies the doc string for parse-partial-sexp, | |
2758 | for make-docfile to see. We cannot put this in the real DEFUN | |
2759 | due to limits in the Unix cpp. | |
2760 | ||
c81a3712 | 2761 | DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0, |
8489eb67 RS |
2762 | "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\ |
2763 | Parsing stops at TO or when certain criteria are met;\n\ | |
2764 | point is set to where parsing stops.\n\ | |
2765 | If fifth arg STATE is omitted or nil,\n\ | |
2766 | parsing assumes that FROM is the beginning of a function.\n\ | |
1a102a58 | 2767 | Value is a list of ten elements describing final state of parsing:\n\ |
af50f9e5 RS |
2768 | 0. depth in parens.\n\ |
2769 | 1. character address of start of innermost containing list; nil if none.\n\ | |
2770 | 2. character address of start of last complete sexp terminated.\n\ | |
2771 | 3. non-nil if inside a string.\n\ | |
195d1361 | 2772 | (it is the character that will terminate the string,\n\ |
bff37d2a | 2773 | or t if the string should be terminated by a generic string delimiter.)\n\ |
95ff8dfc RS |
2774 | 4. nil if outside a comment, t if inside a non-nestable comment, \n\ |
2775 | else an integer (the current comment nesting).\n\ | |
af50f9e5 RS |
2776 | 5. t if following a quote character.\n\ |
2777 | 6. the minimum paren-depth encountered during this scan.\n\ | |
bff37d2a RS |
2778 | 7. t if in a comment of style b; `syntax-table' if the comment\n\ |
2779 | should be terminated by a generic comment delimiter.\n\ | |
2780 | 8. character address of start of comment or string; nil if not in one.\n\ | |
1a102a58 | 2781 | 9. Intermediate data for continuation of parsing (subject to change).\n\ |
8489eb67 RS |
2782 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\ |
2783 | in parentheses becomes equal to TARGETDEPTH.\n\ | |
2784 | Fourth arg STOPBEFORE non-nil means stop when come to\n\ | |
2785 | any character that starts a sexp.\n\ | |
bff37d2a RS |
2786 | Fifth arg STATE is a nine-element list like what this function returns.\n\ |
2787 | It is used to initialize the state of the parse. Elements number 1, 2, 6\n\ | |
2788 | and 8 are ignored; you can leave off element 8 (the last) entirely.\n\ | |
2789 | Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.\n\ | |
2790 | If it is `syntax-table', stop after the start of a comment or a string,\n\ | |
2791 | or after end of a comment or a string.") | |
c81a3712 | 2792 | (from, to, targetdepth, stopbefore, state, commentstop) |
8489eb67 RS |
2793 | */ |
2794 | ||
c81a3712 | 2795 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
8489eb67 | 2796 | 0 /* See immediately above */) |
c81a3712 RS |
2797 | (from, to, targetdepth, stopbefore, oldstate, commentstop) |
2798 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; | |
8489eb67 RS |
2799 | { |
2800 | struct lisp_parse_state state; | |
2801 | int target; | |
2802 | ||
265a9e55 | 2803 | if (!NILP (targetdepth)) |
8489eb67 RS |
2804 | { |
2805 | CHECK_NUMBER (targetdepth, 3); | |
2806 | target = XINT (targetdepth); | |
2807 | } | |
2808 | else | |
2809 | target = -100000; /* We won't reach this depth */ | |
2810 | ||
2811 | validate_region (&from, &to); | |
6a140a74 RS |
2812 | scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)), |
2813 | XINT (to), | |
c81a3712 | 2814 | target, !NILP (stopbefore), oldstate, |
195d1361 RS |
2815 | (NILP (commentstop) |
2816 | ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); | |
8489eb67 RS |
2817 | |
2818 | SET_PT (state.location); | |
2819 | ||
2820 | return Fcons (make_number (state.depth), | |
2821 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
2822 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
195d1361 RS |
2823 | Fcons (state.instring >= 0 |
2824 | ? (state.instring == ST_STRING_STYLE | |
2825 | ? Qt : make_number (state.instring)) : Qnil, | |
95ff8dfc RS |
2826 | Fcons (state.incomment < 0 ? Qt : |
2827 | (state.incomment == 0 ? Qnil : | |
2828 | make_number (state.incomment)), | |
8489eb67 | 2829 | Fcons (state.quoted ? Qt : Qnil, |
bff37d2a RS |
2830 | Fcons (make_number (state.mindepth), |
2831 | Fcons ((state.comstyle | |
2832 | ? (state.comstyle == ST_COMMENT_STYLE | |
2833 | ? Qsyntax_table : Qt) : | |
2834 | Qnil), | |
0beaf54f DL |
2835 | Fcons (((state.incomment |
2836 | || (state.instring >= 0)) | |
bff37d2a RS |
2837 | ? make_number (state.comstr_start) |
2838 | : Qnil), | |
1a102a58 | 2839 | Fcons (state.levelstarts, Qnil)))))))))); |
8489eb67 RS |
2840 | } |
2841 | \f | |
dfcf069d | 2842 | void |
8489eb67 RS |
2843 | init_syntax_once () |
2844 | { | |
78f9a1f7 | 2845 | register int i, c; |
8ea151b2 | 2846 | Lisp_Object temp; |
8489eb67 | 2847 | |
5ebaddf5 RS |
2848 | /* This has to be done here, before we call Fmake_char_table. */ |
2849 | Qsyntax_table = intern ("syntax-table"); | |
2850 | staticpro (&Qsyntax_table); | |
2851 | ||
2852 | /* Intern this now in case it isn't already done. | |
2853 | Setting this variable twice is harmless. | |
2854 | But don't staticpro it here--that is done in alloc.c. */ | |
2855 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
2856 | ||
93da5fff | 2857 | /* Create objects which can be shared among syntax tables. */ |
44d8a793 | 2858 | Vsyntax_code_object = Fmake_vector (make_number (13), Qnil); |
93da5fff KH |
2859 | for (i = 0; i < XVECTOR (Vsyntax_code_object)->size; i++) |
2860 | XVECTOR (Vsyntax_code_object)->contents[i] | |
2861 | = Fcons (make_number (i), Qnil); | |
2862 | ||
5ebaddf5 RS |
2863 | /* Now we are ready to set up this property, so we can |
2864 | create syntax tables. */ | |
2865 | Fput (Qsyntax_table, Qchar_table_extra_slots, make_number (0)); | |
2866 | ||
93da5fff | 2867 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; |
8489eb67 | 2868 | |
5ebaddf5 | 2869 | Vstandard_syntax_table = Fmake_char_table (Qsyntax_table, temp); |
8489eb67 | 2870 | |
93da5fff | 2871 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; |
8489eb67 | 2872 | for (i = 'a'; i <= 'z'; i++) |
8ea151b2 | 2873 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 2874 | for (i = 'A'; i <= 'Z'; i++) |
8ea151b2 | 2875 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 2876 | for (i = '0'; i <= '9'; i++) |
8ea151b2 RS |
2877 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
2878 | ||
2879 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '$', temp); | |
2880 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '%', temp); | |
2881 | ||
2882 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '(', | |
2883 | Fcons (make_number (Sopen), make_number (')'))); | |
2884 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ')', | |
2885 | Fcons (make_number (Sclose), make_number ('('))); | |
2886 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '[', | |
2887 | Fcons (make_number (Sopen), make_number (']'))); | |
2888 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ']', | |
2889 | Fcons (make_number (Sclose), make_number ('['))); | |
2890 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '{', | |
2891 | Fcons (make_number (Sopen), make_number ('}'))); | |
2892 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '}', | |
2893 | Fcons (make_number (Sclose), make_number ('{'))); | |
2894 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '"', | |
2895 | Fcons (make_number ((int) Sstring), Qnil)); | |
2896 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\\', | |
2897 | Fcons (make_number ((int) Sescape), Qnil)); | |
2898 | ||
93da5fff | 2899 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Ssymbol]; |
8489eb67 | 2900 | for (i = 0; i < 10; i++) |
78f9a1f7 KH |
2901 | { |
2902 | c = "_-+*/&|<>="[i]; | |
2903 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
2904 | } | |
8489eb67 | 2905 | |
93da5fff | 2906 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; |
8489eb67 | 2907 | for (i = 0; i < 12; i++) |
78f9a1f7 KH |
2908 | { |
2909 | c = ".,;:?!#@~^'`"[i]; | |
2910 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
2911 | } | |
8489eb67 RS |
2912 | } |
2913 | ||
dfcf069d | 2914 | void |
8489eb67 RS |
2915 | syms_of_syntax () |
2916 | { | |
2917 | Qsyntax_table_p = intern ("syntax-table-p"); | |
2918 | staticpro (&Qsyntax_table_p); | |
2919 | ||
93da5fff KH |
2920 | staticpro (&Vsyntax_code_object); |
2921 | ||
7bf5e9e4 RS |
2922 | Qscan_error = intern ("scan-error"); |
2923 | staticpro (&Qscan_error); | |
2924 | Fput (Qscan_error, Qerror_conditions, | |
f3be100f | 2925 | Fcons (Qscan_error, Fcons (Qerror, Qnil))); |
7bf5e9e4 RS |
2926 | Fput (Qscan_error, Qerror_message, |
2927 | build_string ("Scan error")); | |
2928 | ||
8489eb67 RS |
2929 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, |
2930 | "Non-nil means `forward-sexp', etc., should treat comments as whitespace."); | |
2931 | ||
195d1361 RS |
2932 | DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties, |
2933 | "Non-nil means `forward-sexp', etc., grant `syntax-table' property.\n\ | |
2934 | The value of this property should be either a syntax table, or a cons\n\ | |
2935 | of the form (SYNTAXCODE . MATCHCHAR), SYNTAXCODE being the numeric\n\ | |
2936 | syntax code, MATCHCHAR being nil or the character to match (which is\n\ | |
2937 | relevant only for open/close type."); | |
2938 | ||
8489eb67 RS |
2939 | words_include_escapes = 0; |
2940 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
2941 | "Non-nil means `forward-word', etc., should treat escape chars part of words."); | |
2942 | ||
2943 | defsubr (&Ssyntax_table_p); | |
2944 | defsubr (&Ssyntax_table); | |
2945 | defsubr (&Sstandard_syntax_table); | |
2946 | defsubr (&Scopy_syntax_table); | |
2947 | defsubr (&Sset_syntax_table); | |
2948 | defsubr (&Schar_syntax); | |
beefa22e | 2949 | defsubr (&Smatching_paren); |
8489eb67 RS |
2950 | defsubr (&Smodify_syntax_entry); |
2951 | defsubr (&Sdescribe_syntax); | |
2952 | ||
2953 | defsubr (&Sforward_word); | |
2954 | ||
195d1361 RS |
2955 | defsubr (&Sskip_chars_forward); |
2956 | defsubr (&Sskip_chars_backward); | |
2957 | defsubr (&Sskip_syntax_forward); | |
2958 | defsubr (&Sskip_syntax_backward); | |
2959 | ||
b3cfe0c8 | 2960 | defsubr (&Sforward_comment); |
8489eb67 RS |
2961 | defsubr (&Sscan_lists); |
2962 | defsubr (&Sscan_sexps); | |
2963 | defsubr (&Sbackward_prefix_chars); | |
2964 | defsubr (&Sparse_partial_sexp); | |
2965 | } |