Commit | Line | Data |
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8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
b29ff194 | 2 | Copyright (C) 1985, 87, 93, 94, 95, 97, 1998 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" |
95ff8dfc | 28 | #include <assert.h> |
195d1361 RS |
29 | |
30 | /* Make syntax table lookup grant data in gl_state. */ | |
31 | #define SYNTAX_ENTRY_VIA_PROPERTY | |
32 | ||
8489eb67 | 33 | #include "syntax.h" |
195d1361 RS |
34 | #include "intervals.h" |
35 | ||
36 | /* We use these constants in place for comment-style and | |
37 | string-ender-char to distinguish comments/strings started by | |
38 | comment_fence and string_fence codes. */ | |
39 | ||
40 | #define ST_COMMENT_STYLE (256 + 1) | |
41 | #define ST_STRING_STYLE (256 + 2) | |
93da5fff | 42 | #include "category.h" |
8489eb67 | 43 | |
7bf5e9e4 | 44 | Lisp_Object Qsyntax_table_p, Qsyntax_table, Qscan_error; |
8489eb67 RS |
45 | |
46 | int words_include_escapes; | |
195d1361 | 47 | int parse_sexp_lookup_properties; |
8489eb67 | 48 | |
8ea151b2 RS |
49 | /* Used as a temporary in SYNTAX_ENTRY and other macros in syntax.h, |
50 | if not compiled with GCC. No need to mark it, since it is used | |
51 | only very temporarily. */ | |
52 | Lisp_Object syntax_temp; | |
53 | ||
e5d4f4dc RS |
54 | /* This is the internal form of the parse state used in parse-partial-sexp. */ |
55 | ||
56 | struct lisp_parse_state | |
57 | { | |
195d1361 RS |
58 | int depth; /* Depth at end of parsing. */ |
59 | int instring; /* -1 if not within string, else desired terminator. */ | |
95ff8dfc | 60 | int incomment; /* -1 if in unnestable comment else comment nesting */ |
195d1361 | 61 | int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */ |
e5d4f4dc RS |
62 | int quoted; /* Nonzero if just after an escape char at end of parsing */ |
63 | int thislevelstart; /* Char number of most recent start-of-expression at current level */ | |
64 | int prevlevelstart; /* Char number of start of containing expression */ | |
195d1361 | 65 | int location; /* Char number at which parsing stopped. */ |
e5d4f4dc | 66 | int mindepth; /* Minimum depth seen while scanning. */ |
195d1361 | 67 | int comstr_start; /* Position just after last comment/string starter. */ |
1a102a58 RS |
68 | Lisp_Object levelstarts; /* Char numbers of starts-of-expression |
69 | of levels (starting from outermost). */ | |
e5d4f4dc RS |
70 | }; |
71 | \f | |
37bef230 RS |
72 | /* These variables are a cache for finding the start of a defun. |
73 | find_start_pos is the place for which the defun start was found. | |
74 | find_start_value is the defun start position found for it. | |
6a140a74 | 75 | find_start_value_byte is the corresponding byte position. |
37bef230 RS |
76 | find_start_buffer is the buffer it was found in. |
77 | find_start_begv is the BEGV value when it was found. | |
78 | find_start_modiff is the value of MODIFF when it was found. */ | |
79 | ||
80 | static int find_start_pos; | |
81 | static int find_start_value; | |
6a140a74 | 82 | static int find_start_value_byte; |
37bef230 RS |
83 | static struct buffer *find_start_buffer; |
84 | static int find_start_begv; | |
85 | static int find_start_modiff; | |
6a140a74 RS |
86 | |
87 | ||
88 | static int find_defun_start P_ ((int, int)); | |
95ff8dfc | 89 | static int back_comment P_ ((int, int, int, int, int, int *, int *)); |
6a140a74 RS |
90 | static int char_quoted P_ ((int, int)); |
91 | static Lisp_Object skip_chars P_ ((int, int, Lisp_Object, Lisp_Object)); | |
92 | static Lisp_Object scan_lists P_ ((int, int, int, int)); | |
93 | static void scan_sexps_forward P_ ((struct lisp_parse_state *, | |
94 | int, int, int, int, | |
95 | int, Lisp_Object, int)); | |
195d1361 RS |
96 | \f |
97 | ||
98 | struct gl_state_s gl_state; /* Global state of syntax parser. */ | |
99 | ||
100 | INTERVAL interval_of (); | |
101 | #define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals | |
102 | to scan to property-change. */ | |
103 | ||
6a140a74 RS |
104 | /* Update gl_state to an appropriate interval which contains CHARPOS. The |
105 | sign of COUNT give the relative position of CHARPOS wrt the previously | |
195d1361 | 106 | valid interval. If INIT, only [be]_property fields of gl_state are |
6a140a74 | 107 | valid at start, the rest is filled basing on OBJECT. |
195d1361 | 108 | |
6a140a74 | 109 | `gl_state.*_i' are the intervals, and CHARPOS is further in the search |
195d1361 RS |
110 | direction than the intervals - or in an interval. We update the |
111 | current syntax-table basing on the property of this interval, and | |
6a140a74 | 112 | update the interval to start further than CHARPOS - or be |
195d1361 | 113 | NULL_INTERVAL. We also update lim_property to be the next value of |
6a140a74 | 114 | charpos to call this subroutine again - or be before/after the |
195d1361 RS |
115 | start/end of OBJECT. */ |
116 | ||
117 | void | |
6a140a74 RS |
118 | update_syntax_table (charpos, count, init, object) |
119 | int charpos, count, init; | |
195d1361 RS |
120 | Lisp_Object object; |
121 | { | |
122 | Lisp_Object tmp_table; | |
4ffe723b | 123 | int cnt = 0, invalidate = 1; |
195d1361 RS |
124 | INTERVAL i, oldi; |
125 | ||
126 | if (init) | |
127 | { | |
128 | gl_state.start = gl_state.b_property; | |
129 | gl_state.stop = gl_state.e_property; | |
6a140a74 | 130 | gl_state.forward_i = interval_of (charpos, object); |
195d1361 RS |
131 | i = gl_state.backward_i = gl_state.forward_i; |
132 | gl_state.left_ok = gl_state.right_ok = 1; | |
133 | invalidate = 0; | |
134 | if (NULL_INTERVAL_P (i)) | |
135 | return; | |
f902a008 | 136 | /* interval_of updates only ->position of the return value, so |
d80f4cc7 RS |
137 | update the parents manually to speed up update_interval. */ |
138 | while (!NULL_PARENT (i)) | |
139 | { | |
140 | if (AM_RIGHT_CHILD (i)) | |
141 | i->parent->position = i->position | |
142 | - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */ | |
143 | - TOTAL_LENGTH (i->parent) | |
144 | + LEFT_TOTAL_LENGTH (i->parent); | |
145 | else | |
146 | i->parent->position = i->position - LEFT_TOTAL_LENGTH (i) | |
147 | + TOTAL_LENGTH (i); | |
148 | i = i->parent; | |
149 | } | |
150 | i = gl_state.forward_i; | |
ee0cdb48 KH |
151 | gl_state.b_property = i->position - 1 - gl_state.offset; |
152 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; | |
195d1361 RS |
153 | goto update; |
154 | } | |
155 | oldi = i = count > 0 ? gl_state.forward_i : gl_state.backward_i; | |
156 | ||
6a140a74 RS |
157 | /* We are guarantied to be called with CHARPOS either in i, |
158 | or further off. */ | |
195d1361 RS |
159 | if (NULL_INTERVAL_P (i)) |
160 | error ("Error in syntax_table logic for to-the-end intervals"); | |
6a140a74 | 161 | else if (charpos < i->position) /* Move left. */ |
195d1361 RS |
162 | { |
163 | if (count > 0) | |
f902a008 | 164 | error ("Error in syntax_table logic for intervals <-"); |
195d1361 | 165 | /* Update the interval. */ |
6a140a74 | 166 | i = update_interval (i, charpos); |
195d1361 RS |
167 | if (oldi->position != INTERVAL_LAST_POS (i)) |
168 | { | |
169 | invalidate = 0; | |
170 | gl_state.right_ok = 1; /* Invalidate the other end. */ | |
171 | gl_state.forward_i = i; | |
ee0cdb48 | 172 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
173 | } |
174 | } | |
6a140a74 | 175 | else if (charpos >= INTERVAL_LAST_POS (i)) /* Move right. */ |
195d1361 RS |
176 | { |
177 | if (count < 0) | |
f902a008 | 178 | error ("Error in syntax_table logic for intervals ->"); |
195d1361 | 179 | /* Update the interval. */ |
6a140a74 | 180 | i = update_interval (i, charpos); |
195d1361 RS |
181 | if (i->position != INTERVAL_LAST_POS (oldi)) |
182 | { | |
183 | invalidate = 0; | |
184 | gl_state.left_ok = 1; /* Invalidate the other end. */ | |
185 | gl_state.backward_i = i; | |
ee0cdb48 | 186 | gl_state.b_property = i->position - 1 - gl_state.offset; |
195d1361 RS |
187 | } |
188 | } | |
189 | else if (count > 0 ? gl_state.right_ok : gl_state.left_ok) | |
190 | { | |
191 | /* We do not need to recalculate tmp_table. */ | |
192 | tmp_table = gl_state.old_prop; | |
193 | } | |
194 | ||
195 | update: | |
196 | tmp_table = textget (i->plist, Qsyntax_table); | |
197 | ||
198 | if (invalidate) | |
199 | invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */ | |
200 | ||
201 | if (invalidate) /* Did not get to adjacent interval. */ | |
202 | { /* with the same table => */ | |
203 | /* invalidate the old range. */ | |
204 | if (count > 0) | |
205 | { | |
206 | gl_state.backward_i = i; | |
207 | gl_state.left_ok = 1; /* Invalidate the other end. */ | |
ee0cdb48 | 208 | gl_state.b_property = i->position - 1 - gl_state.offset; |
195d1361 RS |
209 | } |
210 | else | |
211 | { | |
212 | gl_state.forward_i = i; | |
213 | gl_state.right_ok = 1; /* Invalidate the other end. */ | |
ee0cdb48 | 214 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
215 | } |
216 | } | |
37bef230 | 217 | |
195d1361 RS |
218 | gl_state.current_syntax_table = tmp_table; |
219 | gl_state.old_prop = tmp_table; | |
2e34157c | 220 | if (EQ (Fsyntax_table_p (tmp_table), Qt)) |
195d1361 RS |
221 | { |
222 | gl_state.use_global = 0; | |
223 | } | |
224 | else if (CONSP (tmp_table)) | |
225 | { | |
226 | gl_state.use_global = 1; | |
227 | gl_state.global_code = tmp_table; | |
228 | } | |
229 | else | |
230 | { | |
231 | gl_state.use_global = 0; | |
232 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
233 | } | |
234 | ||
235 | while (!NULL_INTERVAL_P (i)) | |
236 | { | |
237 | if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table))) | |
238 | { | |
239 | if (count > 0) | |
240 | gl_state.right_ok = 0; | |
241 | else | |
242 | gl_state.left_ok = 0; | |
243 | break; | |
244 | } | |
245 | else if (cnt == INTERVALS_AT_ONCE) | |
246 | { | |
247 | if (count > 0) | |
248 | gl_state.right_ok = 1; | |
249 | else | |
250 | gl_state.left_ok = 1; | |
251 | break; | |
252 | } | |
253 | cnt++; | |
254 | i = count > 0 ? next_interval (i) : previous_interval (i); | |
255 | } | |
256 | if (NULL_INTERVAL_P (i)) | |
257 | { /* This property goes to the end. */ | |
258 | if (count > 0) | |
259 | gl_state.e_property = gl_state.stop; | |
260 | else | |
261 | gl_state.b_property = gl_state.start; | |
262 | } | |
263 | else | |
264 | { | |
265 | if (count > 0) | |
266 | { | |
ee0cdb48 | 267 | gl_state.e_property = i->position - gl_state.offset; |
195d1361 RS |
268 | gl_state.forward_i = i; |
269 | } | |
270 | else | |
271 | { | |
ee0cdb48 | 272 | gl_state.b_property = i->position + LENGTH (i) - 1 - gl_state.offset; |
195d1361 RS |
273 | gl_state.backward_i = i; |
274 | } | |
275 | } | |
276 | } | |
277 | \f | |
6a140a74 RS |
278 | /* Returns TRUE if char at CHARPOS is quoted. |
279 | Global syntax-table data should be set up already to be good at CHARPOS | |
280 | or after. On return global syntax data is good for lookup at CHARPOS. */ | |
195d1361 RS |
281 | |
282 | static int | |
6a140a74 RS |
283 | char_quoted (charpos, bytepos) |
284 | register int charpos, bytepos; | |
195d1361 RS |
285 | { |
286 | register enum syntaxcode code; | |
287 | register int beg = BEGV; | |
288 | register int quoted = 0; | |
6a140a74 RS |
289 | int orig = charpos; |
290 | ||
291 | DEC_BOTH (charpos, bytepos); | |
195d1361 | 292 | |
6a140a74 | 293 | while (bytepos >= beg) |
195d1361 | 294 | { |
6a140a74 RS |
295 | UPDATE_SYNTAX_TABLE_BACKWARD (charpos); |
296 | code = SYNTAX (FETCH_CHAR (bytepos)); | |
297 | if (! (code == Scharquote || code == Sescape)) | |
298 | break; | |
299 | ||
300 | DEC_BOTH (charpos, bytepos); | |
301 | quoted = !quoted; | |
195d1361 | 302 | } |
6a140a74 RS |
303 | |
304 | UPDATE_SYNTAX_TABLE (orig); | |
195d1361 RS |
305 | return quoted; |
306 | } | |
6a140a74 RS |
307 | |
308 | /* Return the bytepos one character after BYTEPOS. | |
309 | We assume that BYTEPOS is not at the end of the buffer. */ | |
310 | ||
311 | INLINE int | |
312 | inc_bytepos (bytepos) | |
313 | int bytepos; | |
314 | { | |
ef316cf0 RS |
315 | if (NILP (current_buffer->enable_multibyte_characters)) |
316 | return bytepos + 1; | |
317 | ||
6a140a74 RS |
318 | INC_POS (bytepos); |
319 | return bytepos; | |
320 | } | |
321 | ||
322 | /* Return the bytepos one character before BYTEPOS. | |
323 | We assume that BYTEPOS is not at the start of the buffer. */ | |
324 | ||
325 | INLINE int | |
326 | dec_bytepos (bytepos) | |
327 | int bytepos; | |
328 | { | |
ef316cf0 RS |
329 | if (NILP (current_buffer->enable_multibyte_characters)) |
330 | return bytepos - 1; | |
331 | ||
6a140a74 RS |
332 | DEC_POS (bytepos); |
333 | return bytepos; | |
334 | } | |
195d1361 | 335 | \f |
37bef230 RS |
336 | /* Find a defun-start that is the last one before POS (or nearly the last). |
337 | We record what we find, so that another call in the same area | |
195d1361 RS |
338 | can return the same value right away. |
339 | ||
340 | There is no promise at which position the global syntax data is | |
341 | valid on return from the subroutine, so the caller should explicitly | |
342 | update the global data. */ | |
37bef230 RS |
343 | |
344 | static int | |
6a140a74 RS |
345 | find_defun_start (pos, pos_byte) |
346 | int pos, pos_byte; | |
37bef230 | 347 | { |
6a140a74 | 348 | int opoint = PT, opoint_byte = PT_BYTE; |
37bef230 RS |
349 | |
350 | /* Use previous finding, if it's valid and applies to this inquiry. */ | |
351 | if (current_buffer == find_start_buffer | |
352 | /* Reuse the defun-start even if POS is a little farther on. | |
353 | POS might be in the next defun, but that's ok. | |
354 | Our value may not be the best possible, but will still be usable. */ | |
355 | && pos <= find_start_pos + 1000 | |
356 | && pos >= find_start_value | |
357 | && BEGV == find_start_begv | |
358 | && MODIFF == find_start_modiff) | |
359 | return find_start_value; | |
360 | ||
361 | /* Back up to start of line. */ | |
6a140a74 | 362 | scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1); |
37bef230 | 363 | |
195d1361 RS |
364 | /* We optimize syntax-table lookup for rare updates. Thus we accept |
365 | only those `^\s(' which are good in global _and_ text-property | |
366 | syntax-tables. */ | |
367 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
368 | gl_state.use_global = 0; | |
6a140a74 | 369 | while (PT > BEGV) |
37bef230 RS |
370 | { |
371 | /* Open-paren at start of line means we found our defun-start. */ | |
6a140a74 | 372 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) |
195d1361 | 373 | { |
6a140a74 RS |
374 | SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */ |
375 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) | |
195d1361 RS |
376 | break; |
377 | /* Now fallback to the default value. */ | |
378 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
379 | gl_state.use_global = 0; | |
380 | } | |
37bef230 | 381 | /* Move to beg of previous line. */ |
6a140a74 | 382 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1); |
37bef230 RS |
383 | } |
384 | ||
385 | /* Record what we found, for the next try. */ | |
6a140a74 RS |
386 | find_start_value = PT; |
387 | find_start_value_byte = PT_BYTE; | |
37bef230 RS |
388 | find_start_buffer = current_buffer; |
389 | find_start_modiff = MODIFF; | |
390 | find_start_begv = BEGV; | |
391 | find_start_pos = pos; | |
392 | ||
6a140a74 RS |
393 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
394 | ||
37bef230 RS |
395 | return find_start_value; |
396 | } | |
397 | \f | |
f902a008 RS |
398 | /* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */ |
399 | ||
400 | static int | |
401 | prev_char_comend_first (pos, pos_byte) | |
402 | int pos, pos_byte; | |
403 | { | |
404 | int c, val; | |
405 | ||
406 | DEC_BOTH (pos, pos_byte); | |
407 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
408 | c = FETCH_CHAR (pos_byte); | |
409 | val = SYNTAX_COMEND_FIRST (c); | |
410 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
411 | return val; | |
412 | } | |
413 | ||
414 | /* Return the SYNTAX_COMSTART_FIRST of the character before POS, POS_BYTE. */ | |
415 | ||
416 | static int | |
417 | prev_char_comstart_first (pos, pos_byte) | |
418 | int pos, pos_byte; | |
419 | { | |
420 | int c, val; | |
421 | ||
422 | DEC_BOTH (pos, pos_byte); | |
423 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
424 | c = FETCH_CHAR (pos_byte); | |
425 | val = SYNTAX_COMSTART_FIRST (c); | |
426 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
427 | return val; | |
428 | } | |
429 | ||
6a140a74 RS |
430 | /* Checks whether charpos FROM is at the end of a comment. |
431 | FROM_BYTE is the bytepos corresponding to FROM. | |
432 | Do not move back before STOP. | |
433 | ||
434 | Return a positive value if we find a comment ending at FROM/FROM_BYTE; | |
435 | return -1 otherwise. | |
436 | ||
437 | If successful, store the charpos of the comment's beginning | |
438 | into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR. | |
527a32d9 KH |
439 | |
440 | Global syntax data remains valid for backward search starting at | |
441 | the returned value (or at FROM, if the search was not successful). */ | |
195d1361 RS |
442 | |
443 | static int | |
95ff8dfc | 444 | back_comment (from, from_byte, stop, comnested, comstyle, charpos_ptr, bytepos_ptr) |
6a140a74 | 445 | int from, from_byte, stop; |
95ff8dfc | 446 | int comnested, comstyle; |
6a140a74 | 447 | int *charpos_ptr, *bytepos_ptr; |
195d1361 RS |
448 | { |
449 | /* Look back, counting the parity of string-quotes, | |
450 | and recording the comment-starters seen. | |
451 | When we reach a safe place, assume that's not in a string; | |
452 | then step the main scan to the earliest comment-starter seen | |
453 | an even number of string quotes away from the safe place. | |
454 | ||
455 | OFROM[I] is position of the earliest comment-starter seen | |
456 | which is I+2X quotes from the comment-end. | |
457 | PARITY is current parity of quotes from the comment end. */ | |
458 | int parity = 0; | |
459 | int my_stringend = 0; | |
460 | int string_lossage = 0; | |
461 | int comment_end = from; | |
6a140a74 | 462 | int comment_end_byte = from_byte; |
195d1361 | 463 | int comstart_pos = 0; |
6a140a74 | 464 | int comstart_byte; |
eb35b628 RS |
465 | /* Value that PARITY had, when we reached the position |
466 | in COMSTART_POS. */ | |
467 | int comstart_parity = 0; | |
195d1361 | 468 | int scanstart = from - 1; |
eb35b628 RS |
469 | /* Place where the containing defun starts, |
470 | or 0 if we didn't come across it yet. */ | |
471 | int defun_start = 0; | |
472 | int defun_start_byte = 0; | |
195d1361 | 473 | register enum syntaxcode code; |
95ff8dfc | 474 | int nesting = 1; /* current comment nesting */ |
ea315ed6 | 475 | int c; |
195d1361 RS |
476 | |
477 | /* At beginning of range to scan, we're outside of strings; | |
478 | that determines quote parity to the comment-end. */ | |
479 | while (from != stop) | |
480 | { | |
4ffe723b | 481 | int temp_byte; |
6a140a74 | 482 | |
195d1361 | 483 | /* Move back and examine a character. */ |
6a140a74 | 484 | DEC_BOTH (from, from_byte); |
195d1361 RS |
485 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
486 | ||
6a140a74 | 487 | c = FETCH_CHAR (from_byte); |
195d1361 RS |
488 | code = SYNTAX (c); |
489 | ||
527a32d9 | 490 | /* If this char is the second of a 2-char comment end sequence, |
195d1361 RS |
491 | back up and give the pair the appropriate syntax. */ |
492 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
f902a008 | 493 | && prev_char_comend_first (from, from_byte)) |
195d1361 RS |
494 | { |
495 | code = Sendcomment; | |
6a140a74 | 496 | DEC_BOTH (from, from_byte); |
195d1361 | 497 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 498 | c = FETCH_CHAR (from_byte); |
195d1361 RS |
499 | } |
500 | ||
501 | /* If this char starts a 2-char comment start sequence, | |
502 | treat it like a 1-char comment starter. */ | |
f902a008 RS |
503 | if (from < scanstart && SYNTAX_COMSTART_FIRST (c)) |
504 | { | |
505 | temp_byte = inc_bytepos (from_byte); | |
506 | UPDATE_SYNTAX_TABLE_FORWARD (from + 1); | |
507 | if (SYNTAX_COMSTART_SECOND (FETCH_CHAR (temp_byte)) | |
508 | && comstyle == SYNTAX_COMMENT_STYLE (FETCH_CHAR (temp_byte))) | |
509 | code = Scomment; | |
510 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
511 | } | |
195d1361 | 512 | |
9828a477 KH |
513 | /* Ignore escaped characters, except comment-enders. */ |
514 | if (code != Sendcomment && char_quoted (from, from_byte)) | |
195d1361 RS |
515 | continue; |
516 | ||
517 | /* Track parity of quotes. */ | |
518 | if (code == Sstring) | |
519 | { | |
520 | parity ^= 1; | |
521 | if (my_stringend == 0) | |
522 | my_stringend = c; | |
523 | /* If we have two kinds of string delimiters. | |
524 | There's no way to grok this scanning backwards. */ | |
525 | else if (my_stringend != c) | |
526 | string_lossage = 1; | |
527 | } | |
528 | ||
529 | if (code == Sstring_fence || code == Scomment_fence) | |
530 | { | |
531 | parity ^= 1; | |
532 | if (my_stringend == 0) | |
6a140a74 RS |
533 | my_stringend |
534 | = code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE; | |
195d1361 RS |
535 | /* If we have two kinds of string delimiters. |
536 | There's no way to grok this scanning backwards. */ | |
537 | else if (my_stringend != (code == Sstring_fence | |
538 | ? ST_STRING_STYLE : ST_COMMENT_STYLE)) | |
539 | string_lossage = 1; | |
540 | } | |
541 | ||
195d1361 | 542 | if (code == Scomment) |
95ff8dfc RS |
543 | /* FIXME: we should also check that the comstyle is correct |
544 | if the Scomment is a single-char. */ | |
195d1361 | 545 | { |
95ff8dfc RS |
546 | if (comnested && --nesting <= 0 && parity == 0 && !string_lossage) |
547 | /* nested comments have to be balanced, so we don't need to | |
548 | keep looking for earlier ones. We use here the same (slightly | |
549 | incorrect) reasoning as below: since it is followed by uniform | |
550 | paired string quotes, this comment-start has to be outside of | |
551 | strings, else the comment-end itself would be inside a string. */ | |
552 | goto done; | |
553 | ||
554 | /* Record comment-starters according to that | |
555 | quote-parity to the comment-end. */ | |
195d1361 RS |
556 | comstart_parity = parity; |
557 | comstart_pos = from; | |
6a140a74 | 558 | comstart_byte = from_byte; |
195d1361 RS |
559 | } |
560 | ||
561 | /* If we find another earlier comment-ender, | |
562 | any comment-starts earlier than that don't count | |
563 | (because they go with the earlier comment-ender). */ | |
564 | if (code == Sendcomment | |
6a140a74 | 565 | && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte)) == comstyle) |
4ffe723b GM |
566 | { |
567 | if (comnested) | |
568 | nesting++; | |
569 | else | |
570 | break; | |
571 | } | |
195d1361 RS |
572 | |
573 | /* Assume a defun-start point is outside of strings. */ | |
574 | if (code == Sopen | |
6a140a74 RS |
575 | && (from == stop |
576 | || (temp_byte = dec_bytepos (from_byte), | |
577 | FETCH_CHAR (temp_byte) == '\n'))) | |
eb35b628 RS |
578 | { |
579 | defun_start = from; | |
580 | defun_start_byte = from_byte; | |
581 | break; | |
582 | } | |
195d1361 RS |
583 | } |
584 | ||
585 | if (comstart_pos == 0) | |
586 | { | |
587 | from = comment_end; | |
6a140a74 | 588 | from_byte = comment_end_byte; |
195d1361 RS |
589 | UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1); |
590 | } | |
591 | /* If the earliest comment starter | |
592 | is followed by uniform paired string quotes or none, | |
593 | we know it can't be inside a string | |
594 | since if it were then the comment ender would be inside one. | |
595 | So it does start a comment. Skip back to it. */ | |
95ff8dfc | 596 | else if (!comnested && comstart_parity == 0 && !string_lossage) |
195d1361 RS |
597 | { |
598 | from = comstart_pos; | |
6a140a74 | 599 | from_byte = comstart_byte; |
195d1361 RS |
600 | /* Globals are correct now. */ |
601 | } | |
602 | else | |
603 | { | |
604 | /* We had two kinds of string delimiters mixed up | |
605 | together. Decode this going forwards. | |
606 | Scan fwd from the previous comment ender | |
607 | to the one in question; this records where we | |
608 | last passed a comment starter. */ | |
609 | struct lisp_parse_state state; | |
eb35b628 RS |
610 | /* If we did not already find the defun start, find it now. */ |
611 | if (defun_start == 0) | |
612 | { | |
613 | defun_start = find_defun_start (comment_end, comment_end_byte); | |
614 | defun_start_byte = find_start_value_byte; | |
615 | } | |
6a140a74 | 616 | scan_sexps_forward (&state, |
eb35b628 | 617 | defun_start, defun_start_byte, |
195d1361 RS |
618 | comment_end - 1, -10000, 0, Qnil, 0); |
619 | if (state.incomment) | |
620 | { | |
621 | /* scan_sexps_forward changed the direction of search in | |
622 | global variables, so we need to update it completely. */ | |
623 | ||
624 | from = state.comstr_start; | |
625 | } | |
626 | else | |
627 | { | |
628 | from = comment_end; | |
629 | } | |
6a140a74 | 630 | from_byte = CHAR_TO_BYTE (from); |
195d1361 RS |
631 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
632 | } | |
633 | ||
95ff8dfc | 634 | done: |
6a140a74 RS |
635 | *charpos_ptr = from; |
636 | *bytepos_ptr = from_byte; | |
637 | ||
195d1361 RS |
638 | return from; |
639 | } | |
640 | \f | |
8489eb67 | 641 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
2203e1e8 | 642 | "Return t if OBJECT is a syntax table.\n\ |
8ea151b2 | 643 | Currently, any char-table counts as a syntax table.") |
2203e1e8 EN |
644 | (object) |
645 | Lisp_Object object; | |
8489eb67 | 646 | { |
2203e1e8 | 647 | if (CHAR_TABLE_P (object) |
e704cb4b | 648 | && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table)) |
8489eb67 RS |
649 | return Qt; |
650 | return Qnil; | |
651 | } | |
652 | ||
8ea151b2 | 653 | static void |
8489eb67 RS |
654 | check_syntax_table (obj) |
655 | Lisp_Object obj; | |
656 | { | |
d1be9f0f | 657 | if (!(CHAR_TABLE_P (obj) |
e704cb4b | 658 | && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table))) |
d1be9f0f | 659 | wrong_type_argument (Qsyntax_table_p, obj); |
8489eb67 RS |
660 | } |
661 | ||
8489eb67 RS |
662 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, |
663 | "Return the current syntax table.\n\ | |
664 | This is the one specified by the current buffer.") | |
665 | () | |
666 | { | |
667 | return current_buffer->syntax_table; | |
668 | } | |
669 | ||
670 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
671 | Sstandard_syntax_table, 0, 0, 0, | |
672 | "Return the standard syntax table.\n\ | |
673 | This is the one used for new buffers.") | |
674 | () | |
675 | { | |
676 | return Vstandard_syntax_table; | |
677 | } | |
678 | ||
679 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
680 | "Construct a new syntax table and return it.\n\ | |
681 | It is a copy of the TABLE, which defaults to the standard syntax table.") | |
682 | (table) | |
683 | Lisp_Object table; | |
684 | { | |
8ea151b2 RS |
685 | Lisp_Object copy; |
686 | ||
265a9e55 | 687 | if (!NILP (table)) |
8ea151b2 RS |
688 | check_syntax_table (table); |
689 | else | |
690 | table = Vstandard_syntax_table; | |
691 | ||
692 | copy = Fcopy_sequence (table); | |
0f867324 RS |
693 | |
694 | /* Only the standard syntax table should have a default element. | |
695 | Other syntax tables should inherit from parents instead. */ | |
696 | XCHAR_TABLE (copy)->defalt = Qnil; | |
697 | ||
698 | /* Copied syntax tables should all have parents. | |
699 | If we copied one with no parent, such as the standard syntax table, | |
700 | use the standard syntax table as the copy's parent. */ | |
701 | if (NILP (XCHAR_TABLE (copy)->parent)) | |
702 | Fset_char_table_parent (copy, Vstandard_syntax_table); | |
8ea151b2 | 703 | return copy; |
8489eb67 RS |
704 | } |
705 | ||
706 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
707 | "Select a new syntax table for the current buffer.\n\ | |
708 | One argument, a syntax table.") | |
709 | (table) | |
710 | Lisp_Object table; | |
711 | { | |
8ea151b2 | 712 | check_syntax_table (table); |
8489eb67 RS |
713 | current_buffer->syntax_table = table; |
714 | /* Indicate that this buffer now has a specified syntax table. */ | |
f110a664 RS |
715 | current_buffer->local_var_flags |
716 | |= XFASTINT (buffer_local_flags.syntax_table); | |
8489eb67 RS |
717 | return table; |
718 | } | |
719 | \f | |
720 | /* Convert a letter which signifies a syntax code | |
721 | into the code it signifies. | |
195d1361 | 722 | This is used by modify-syntax-entry, and other things. */ |
8489eb67 RS |
723 | |
724 | unsigned char syntax_spec_code[0400] = | |
725 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
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, | |
195d1361 | 729 | (char) Swhitespace, (char) Scomment_fence, (char) Sstring, 0377, |
8489eb67 RS |
730 | (char) Smath, 0377, 0377, (char) Squote, |
731 | (char) Sopen, (char) Sclose, 0377, 0377, | |
732 | 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
733 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
734 | 0377, 0377, 0377, 0377, | |
735 | (char) Scomment, 0377, (char) Sendcomment, 0377, | |
6cb71bf6 | 736 | (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ |
8489eb67 RS |
737 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
738 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
739 | 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
740 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
741 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
742 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
195d1361 | 743 | 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
8489eb67 RS |
744 | }; |
745 | ||
195d1361 | 746 | /* Indexed by syntax code, give the letter that describes it. */ |
8489eb67 | 747 | |
195d1361 | 748 | char syntax_code_spec[16] = |
8489eb67 | 749 | { |
195d1361 RS |
750 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@', |
751 | '!', '|' | |
8489eb67 | 752 | }; |
93da5fff KH |
753 | |
754 | /* Indexed by syntax code, give the object (cons of syntax code and | |
755 | nil) to be stored in syntax table. Since these objects can be | |
756 | shared among syntax tables, we generate them in advance. By | |
757 | sharing objects, the function `describe-syntax' can give a more | |
758 | compact listing. */ | |
759 | static Lisp_Object Vsyntax_code_object; | |
760 | ||
8489eb67 | 761 | \f |
8ea151b2 RS |
762 | /* Look up the value for CHARACTER in syntax table TABLE's parent |
763 | and its parents. SYNTAX_ENTRY calls this, when TABLE itself has nil | |
764 | for CHARACTER. It's actually used only when not compiled with GCC. */ | |
765 | ||
766 | Lisp_Object | |
767 | syntax_parent_lookup (table, character) | |
768 | Lisp_Object table; | |
769 | int character; | |
770 | { | |
771 | Lisp_Object value; | |
772 | ||
773 | while (1) | |
774 | { | |
775 | table = XCHAR_TABLE (table)->parent; | |
776 | if (NILP (table)) | |
777 | return Qnil; | |
778 | ||
779 | value = XCHAR_TABLE (table)->contents[character]; | |
780 | if (!NILP (value)) | |
781 | return value; | |
782 | } | |
783 | } | |
784 | ||
8489eb67 | 785 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, |
2203e1e8 EN |
786 | "Return the syntax code of CHARACTER, described by a character.\n\ |
787 | For example, if CHARACTER is a word constituent,\n\ | |
788 | the character `w' is returned.\n\ | |
8489eb67 RS |
789 | The characters that correspond to various syntax codes\n\ |
790 | are listed in the documentation of `modify-syntax-entry'.") | |
2203e1e8 EN |
791 | (character) |
792 | Lisp_Object character; | |
8489eb67 | 793 | { |
8ea151b2 | 794 | int char_int; |
195d1361 RS |
795 | gl_state.current_syntax_table = current_buffer->syntax_table; |
796 | ||
797 | gl_state.use_global = 0; | |
2203e1e8 EN |
798 | CHECK_NUMBER (character, 0); |
799 | char_int = XINT (character); | |
8ea151b2 | 800 | return make_number (syntax_code_spec[(int) SYNTAX (char_int)]); |
beefa22e RS |
801 | } |
802 | ||
803 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
2203e1e8 EN |
804 | "Return the matching parenthesis of CHARACTER, or nil if none.") |
805 | (character) | |
806 | Lisp_Object character; | |
beefa22e | 807 | { |
8ea151b2 | 808 | int char_int, code; |
195d1361 RS |
809 | gl_state.current_syntax_table = current_buffer->syntax_table; |
810 | gl_state.use_global = 0; | |
2203e1e8 EN |
811 | CHECK_NUMBER (character, 0); |
812 | char_int = XINT (character); | |
8ea151b2 | 813 | code = SYNTAX (char_int); |
a8bd7cd8 | 814 | if (code == Sopen || code == Sclose) |
2e34157c | 815 | return SYNTAX_MATCH (char_int); |
beefa22e | 816 | return Qnil; |
8489eb67 RS |
817 | } |
818 | ||
819 | /* This comment supplies the doc string for modify-syntax-entry, | |
820 | for make-docfile to see. We cannot put this in the real DEFUN | |
821 | due to limits in the Unix cpp. | |
822 | ||
2fcea188 | 823 | DEFUN ("modify-syntax-entry", foo, bar, 2, 3, 0, |
8489eb67 RS |
824 | "Set syntax for character CHAR according to string S.\n\ |
825 | The syntax is changed only for table TABLE, which defaults to\n\ | |
826 | the current buffer's syntax table.\n\ | |
827 | The first character of S should be one of the following:\n\ | |
32676c08 JB |
828 | Space or - whitespace syntax. w word constituent.\n\ |
829 | _ symbol constituent. . punctuation.\n\ | |
830 | ( open-parenthesis. ) close-parenthesis.\n\ | |
831 | \" string quote. \\ escape.\n\ | |
832 | $ paired delimiter. ' expression quote or prefix operator.\n\ | |
abae13bd | 833 | < comment starter. > comment ender.\n\ |
6cb71bf6 | 834 | / character-quote. @ inherit from `standard-syntax-table'.\n\ |
abae13bd | 835 | \n\ |
8489eb67 RS |
836 | Only single-character comment start and end sequences are represented thus.\n\ |
837 | Two-character sequences are represented as described below.\n\ | |
838 | The second character of S is the matching parenthesis,\n\ | |
839 | used only if the first character is `(' or `)'.\n\ | |
840 | Any additional characters are flags.\n\ | |
95ff8dfc | 841 | Defined flags are the characters 1, 2, 3, 4, b, p, and n.\n\ |
2203e1e8 EN |
842 | 1 means CHAR is the start of a two-char comment start sequence.\n\ |
843 | 2 means CHAR is the second character of such a sequence.\n\ | |
844 | 3 means CHAR is the start of a two-char comment end sequence.\n\ | |
845 | 4 means CHAR is the second character of such a sequence.\n\ | |
e5d4f4dc | 846 | \n\ |
195d1361 | 847 | There can be up to two orthogonal comment sequences. This is to support\n\ |
e5d4f4dc | 848 | language modes such as C++. By default, all comment sequences are of style\n\ |
abae13bd RS |
849 | a, but you can set the comment sequence style to b (on the second character\n\ |
850 | of a comment-start, or the first character of a comment-end sequence) using\n\ | |
e5d4f4dc | 851 | this flag:\n\ |
2203e1e8 | 852 | b means CHAR is part of comment sequence b.\n\ |
95ff8dfc | 853 | n means CHAR is part of a nestable comment sequence.\n\ |
e5d4f4dc | 854 | \n\ |
2203e1e8 | 855 | p means CHAR is a prefix character for `backward-prefix-chars';\n\ |
e5d4f4dc | 856 | such characters are treated as whitespace when they occur\n\ |
8489eb67 | 857 | between expressions.") |
2fcea188 | 858 | (char, s, table) |
8489eb67 RS |
859 | */ |
860 | ||
861 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, | |
862 | /* I really don't know why this is interactive | |
863 | help-form should at least be made useful whilst reading the second arg | |
864 | */ | |
865 | "cSet syntax for character: \nsSet syntax for %s to: ", | |
866 | 0 /* See immediately above */) | |
867 | (c, newentry, syntax_table) | |
868 | Lisp_Object c, newentry, syntax_table; | |
869 | { | |
8ea151b2 | 870 | register unsigned char *p; |
8489eb67 | 871 | register enum syntaxcode code; |
247e20a8 | 872 | int val; |
8ea151b2 | 873 | Lisp_Object match; |
8489eb67 RS |
874 | |
875 | CHECK_NUMBER (c, 0); | |
876 | CHECK_STRING (newentry, 1); | |
8ea151b2 | 877 | |
265a9e55 | 878 | if (NILP (syntax_table)) |
8489eb67 RS |
879 | syntax_table = current_buffer->syntax_table; |
880 | else | |
8ea151b2 | 881 | check_syntax_table (syntax_table); |
8489eb67 RS |
882 | |
883 | p = XSTRING (newentry)->data; | |
884 | code = (enum syntaxcode) syntax_spec_code[*p++]; | |
885 | if (((int) code & 0377) == 0377) | |
2e34157c | 886 | error ("invalid syntax description letter: %c", p[-1]); |
8489eb67 | 887 | |
8ea151b2 RS |
888 | if (code == Sinherit) |
889 | { | |
e704cb4b | 890 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), Qnil); |
8ea151b2 RS |
891 | return Qnil; |
892 | } | |
893 | ||
894 | if (*p) | |
d1be9f0f | 895 | { |
93da5fff | 896 | int len; |
7c19e8e1 KH |
897 | int character = (STRING_CHAR_AND_LENGTH |
898 | (p, STRING_BYTES (XSTRING (newentry)) - 1, len)); | |
93da5fff | 899 | XSETINT (match, character); |
d1be9f0f RS |
900 | if (XFASTINT (match) == ' ') |
901 | match = Qnil; | |
93da5fff | 902 | p += len; |
d1be9f0f RS |
903 | } |
904 | else | |
8ea151b2 | 905 | match = Qnil; |
8489eb67 | 906 | |
8ea151b2 | 907 | val = (int) code; |
8489eb67 RS |
908 | while (*p) |
909 | switch (*p++) | |
910 | { | |
911 | case '1': | |
247e20a8 | 912 | val |= 1 << 16; |
8489eb67 RS |
913 | break; |
914 | ||
915 | case '2': | |
247e20a8 | 916 | val |= 1 << 17; |
8489eb67 RS |
917 | break; |
918 | ||
919 | case '3': | |
247e20a8 | 920 | val |= 1 << 18; |
8489eb67 RS |
921 | break; |
922 | ||
923 | case '4': | |
247e20a8 | 924 | val |= 1 << 19; |
8489eb67 RS |
925 | break; |
926 | ||
927 | case 'p': | |
247e20a8 | 928 | val |= 1 << 20; |
8489eb67 | 929 | break; |
e5d4f4dc RS |
930 | |
931 | case 'b': | |
247e20a8 | 932 | val |= 1 << 21; |
e5d4f4dc | 933 | break; |
95ff8dfc RS |
934 | |
935 | case 'n': | |
936 | val |= 1 << 22; | |
937 | break; | |
8489eb67 RS |
938 | } |
939 | ||
93da5fff KH |
940 | if (val < XVECTOR (Vsyntax_code_object)->size && NILP (match)) |
941 | newentry = XVECTOR (Vsyntax_code_object)->contents[val]; | |
942 | else | |
943 | /* Since we can't use a shared object, let's make a new one. */ | |
944 | newentry = Fcons (make_number (val), match); | |
945 | ||
e704cb4b | 946 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), newentry); |
8489eb67 RS |
947 | |
948 | return Qnil; | |
949 | } | |
950 | \f | |
951 | /* Dump syntax table to buffer in human-readable format */ | |
952 | ||
340f92b5 | 953 | static void |
8489eb67 RS |
954 | describe_syntax (value) |
955 | Lisp_Object value; | |
956 | { | |
957 | register enum syntaxcode code; | |
4ffe723b | 958 | char desc, start1, start2, end1, end2, prefix, comstyle; |
8489eb67 | 959 | char str[2]; |
8ea151b2 | 960 | Lisp_Object first, match_lisp; |
8489eb67 RS |
961 | |
962 | Findent_to (make_number (16), make_number (1)); | |
963 | ||
8ea151b2 RS |
964 | if (NILP (value)) |
965 | { | |
93da5fff | 966 | insert_string ("default\n"); |
8ea151b2 RS |
967 | return; |
968 | } | |
969 | ||
908b7fea KH |
970 | if (CHAR_TABLE_P (value)) |
971 | { | |
972 | insert_string ("deeper char-table ...\n"); | |
973 | return; | |
974 | } | |
975 | ||
8ea151b2 RS |
976 | if (!CONSP (value)) |
977 | { | |
93da5fff | 978 | insert_string ("invalid\n"); |
8ea151b2 RS |
979 | return; |
980 | } | |
981 | ||
c1d497be KR |
982 | first = XCAR (value); |
983 | match_lisp = XCDR (value); | |
8ea151b2 RS |
984 | |
985 | if (!INTEGERP (first) || !(NILP (match_lisp) || INTEGERP (match_lisp))) | |
8489eb67 | 986 | { |
93da5fff | 987 | insert_string ("invalid\n"); |
8489eb67 RS |
988 | return; |
989 | } | |
990 | ||
e704cb4b | 991 | code = (enum syntaxcode) (XINT (first) & 0377); |
8ea151b2 RS |
992 | start1 = (XINT (first) >> 16) & 1; |
993 | start2 = (XINT (first) >> 17) & 1; | |
994 | end1 = (XINT (first) >> 18) & 1; | |
995 | end2 = (XINT (first) >> 19) & 1; | |
996 | prefix = (XINT (first) >> 20) & 1; | |
997 | comstyle = (XINT (first) >> 21) & 1; | |
8489eb67 RS |
998 | |
999 | if ((int) code < 0 || (int) code >= (int) Smax) | |
1000 | { | |
1001 | insert_string ("invalid"); | |
1002 | return; | |
1003 | } | |
1004 | desc = syntax_code_spec[(int) code]; | |
1005 | ||
1006 | str[0] = desc, str[1] = 0; | |
1007 | insert (str, 1); | |
1008 | ||
93da5fff KH |
1009 | if (NILP (match_lisp)) |
1010 | insert (" ", 1); | |
1011 | else | |
1012 | insert_char (XINT (match_lisp)); | |
8489eb67 | 1013 | |
8489eb67 RS |
1014 | if (start1) |
1015 | insert ("1", 1); | |
1016 | if (start2) | |
1017 | insert ("2", 1); | |
1018 | ||
1019 | if (end1) | |
1020 | insert ("3", 1); | |
1021 | if (end2) | |
1022 | insert ("4", 1); | |
1023 | ||
1024 | if (prefix) | |
1025 | insert ("p", 1); | |
e5d4f4dc RS |
1026 | if (comstyle) |
1027 | insert ("b", 1); | |
8489eb67 RS |
1028 | |
1029 | insert_string ("\twhich means: "); | |
1030 | ||
0220c518 | 1031 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
1032 | { |
1033 | case Swhitespace: | |
1034 | insert_string ("whitespace"); break; | |
1035 | case Spunct: | |
1036 | insert_string ("punctuation"); break; | |
1037 | case Sword: | |
1038 | insert_string ("word"); break; | |
1039 | case Ssymbol: | |
1040 | insert_string ("symbol"); break; | |
1041 | case Sopen: | |
1042 | insert_string ("open"); break; | |
1043 | case Sclose: | |
1044 | insert_string ("close"); break; | |
1045 | case Squote: | |
1046 | insert_string ("quote"); break; | |
1047 | case Sstring: | |
1048 | insert_string ("string"); break; | |
1049 | case Smath: | |
1050 | insert_string ("math"); break; | |
1051 | case Sescape: | |
1052 | insert_string ("escape"); break; | |
1053 | case Scharquote: | |
1054 | insert_string ("charquote"); break; | |
1055 | case Scomment: | |
1056 | insert_string ("comment"); break; | |
1057 | case Sendcomment: | |
1058 | insert_string ("endcomment"); break; | |
1059 | default: | |
1060 | insert_string ("invalid"); | |
1061 | return; | |
1062 | } | |
1063 | ||
8ea151b2 | 1064 | if (!NILP (match_lisp)) |
8489eb67 RS |
1065 | { |
1066 | insert_string (", matches "); | |
8ea151b2 | 1067 | insert_char (XINT (match_lisp)); |
8489eb67 RS |
1068 | } |
1069 | ||
1070 | if (start1) | |
1071 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
1072 | if (start2) | |
1073 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
1074 | ||
1075 | if (end1) | |
1076 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
1077 | if (end2) | |
1078 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
1079 | if (comstyle) |
1080 | insert_string (" (comment style b)"); | |
1081 | ||
8489eb67 RS |
1082 | if (prefix) |
1083 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
1084 | ||
1085 | insert_string ("\n"); | |
1086 | } | |
1087 | ||
340f92b5 | 1088 | static Lisp_Object |
8489eb67 RS |
1089 | describe_syntax_1 (vector) |
1090 | Lisp_Object vector; | |
1091 | { | |
1092 | struct buffer *old = current_buffer; | |
1093 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
e41819d4 | 1094 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil, (int *) 0, 0); |
93da5fff KH |
1095 | while (! NILP (XCHAR_TABLE (vector)->parent)) |
1096 | { | |
1097 | vector = XCHAR_TABLE (vector)->parent; | |
1098 | insert_string ("\nThe parent syntax table is:"); | |
e41819d4 RS |
1099 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil, |
1100 | (int *) 0, 0); | |
93da5fff KH |
1101 | } |
1102 | ||
36cd82fe | 1103 | call0 (intern ("help-mode")); |
8489eb67 RS |
1104 | set_buffer_internal (old); |
1105 | return Qnil; | |
1106 | } | |
1107 | ||
1108 | DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "", | |
1109 | "Describe the syntax specifications in the syntax table.\n\ | |
1110 | The descriptions are inserted in a buffer, which is then displayed.") | |
1111 | () | |
1112 | { | |
1113 | internal_with_output_to_temp_buffer | |
1114 | ("*Help*", describe_syntax_1, current_buffer->syntax_table); | |
1115 | ||
1116 | return Qnil; | |
1117 | } | |
1118 | \f | |
195d1361 RS |
1119 | int parse_sexp_ignore_comments; |
1120 | ||
8489eb67 RS |
1121 | /* Return the position across COUNT words from FROM. |
1122 | If that many words cannot be found before the end of the buffer, return 0. | |
1123 | COUNT negative means scan backward and stop at word beginning. */ | |
1124 | ||
dfcf069d | 1125 | int |
8489eb67 RS |
1126 | scan_words (from, count) |
1127 | register int from, count; | |
1128 | { | |
1129 | register int beg = BEGV; | |
1130 | register int end = ZV; | |
6a140a74 | 1131 | register int from_byte = CHAR_TO_BYTE (from); |
93da5fff KH |
1132 | register enum syntaxcode code; |
1133 | int ch0, ch1; | |
8489eb67 RS |
1134 | |
1135 | immediate_quit = 1; | |
1136 | QUIT; | |
1137 | ||
195d1361 RS |
1138 | SETUP_SYNTAX_TABLE (from, count); |
1139 | ||
8489eb67 RS |
1140 | while (count > 0) |
1141 | { | |
1142 | while (1) | |
1143 | { | |
1144 | if (from == end) | |
1145 | { | |
1146 | immediate_quit = 0; | |
1147 | return 0; | |
1148 | } | |
195d1361 | 1149 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1150 | ch0 = FETCH_CHAR (from_byte); |
93da5fff | 1151 | code = SYNTAX (ch0); |
6a140a74 | 1152 | INC_BOTH (from, from_byte); |
8489eb67 RS |
1153 | if (words_include_escapes |
1154 | && (code == Sescape || code == Scharquote)) | |
1155 | break; | |
1156 | if (code == Sword) | |
1157 | break; | |
8489eb67 | 1158 | } |
93da5fff KH |
1159 | /* Now CH0 is a character which begins a word and FROM is the |
1160 | position of the next character. */ | |
8489eb67 RS |
1161 | while (1) |
1162 | { | |
1163 | if (from == end) break; | |
195d1361 | 1164 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1165 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1166 | code = SYNTAX (ch1); |
8489eb67 RS |
1167 | if (!(words_include_escapes |
1168 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1169 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1170 | break; |
6a140a74 | 1171 | INC_BOTH (from, from_byte); |
93da5fff | 1172 | ch0 = ch1; |
8489eb67 RS |
1173 | } |
1174 | count--; | |
1175 | } | |
1176 | while (count < 0) | |
1177 | { | |
1178 | while (1) | |
1179 | { | |
1180 | if (from == beg) | |
1181 | { | |
1182 | immediate_quit = 0; | |
1183 | return 0; | |
1184 | } | |
6a140a74 | 1185 | DEC_BOTH (from, from_byte); |
195d1361 | 1186 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1187 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1188 | code = SYNTAX (ch1); |
8489eb67 RS |
1189 | if (words_include_escapes |
1190 | && (code == Sescape || code == Scharquote)) | |
1191 | break; | |
1192 | if (code == Sword) | |
1193 | break; | |
8489eb67 | 1194 | } |
93da5fff KH |
1195 | /* Now CH1 is a character which ends a word and FROM is the |
1196 | position of it. */ | |
8489eb67 RS |
1197 | while (1) |
1198 | { | |
6a140a74 RS |
1199 | int temp_byte; |
1200 | ||
1201 | if (from == beg) | |
1202 | break; | |
1203 | temp_byte = dec_bytepos (from_byte); | |
195d1361 | 1204 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1205 | ch0 = FETCH_CHAR (temp_byte); |
93da5fff | 1206 | code = SYNTAX (ch0); |
8489eb67 RS |
1207 | if (!(words_include_escapes |
1208 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1209 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1210 | break; |
6a140a74 | 1211 | DEC_BOTH (from, from_byte); |
93da5fff | 1212 | ch1 = ch0; |
8489eb67 RS |
1213 | } |
1214 | count++; | |
1215 | } | |
1216 | ||
1217 | immediate_quit = 0; | |
1218 | ||
1219 | return from; | |
1220 | } | |
1221 | ||
1222 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", | |
1223 | "Move point forward ARG words (backward if ARG is negative).\n\ | |
1224 | Normally returns t.\n\ | |
1225 | If an edge of the buffer is reached, point is left there\n\ | |
1226 | and nil is returned.") | |
1227 | (count) | |
1228 | Lisp_Object count; | |
1229 | { | |
ce1dc510 | 1230 | int val, prompt_end; |
8489eb67 RS |
1231 | CHECK_NUMBER (count, 0); |
1232 | ||
6ec8bbd2 | 1233 | if (!(val = scan_words (PT, XINT (count)))) |
8489eb67 RS |
1234 | { |
1235 | SET_PT (XINT (count) > 0 ? ZV : BEGV); | |
1236 | return Qnil; | |
1237 | } | |
5878ee6f | 1238 | |
ce1dc510 GM |
1239 | /* If in a mini-buffer and moving backwards, stop at the end of the |
1240 | prompt. This prevents accidentially moving into the read-only | |
1241 | prompt. */ | |
abf4a9f7 GM |
1242 | if (INTEGERP (current_buffer->prompt_end_charpos) |
1243 | && (prompt_end = XINT (current_buffer->prompt_end_charpos), | |
ce1dc510 GM |
1244 | ((PT > prompt_end && val < prompt_end) |
1245 | || (PT < prompt_end && val > prompt_end)))) | |
1246 | val = prompt_end; | |
1247 | ||
8489eb67 RS |
1248 | SET_PT (val); |
1249 | return Qt; | |
1250 | } | |
1251 | \f | |
195d1361 RS |
1252 | Lisp_Object skip_chars (); |
1253 | ||
1254 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, | |
1255 | "Move point forward, stopping before a char not in STRING, or at pos LIM.\n\ | |
1256 | STRING is like the inside of a `[...]' in a regular expression\n\ | |
74cf0beb RS |
1257 | except that `]' is never special and `\\' quotes `^', `-' or `\\'\n\ |
1258 | (but not as the end of a range; quoting is never needed there).\n\ | |
195d1361 RS |
1259 | Thus, with arg \"a-zA-Z\", this skips letters stopping before first nonletter.\n\ |
1260 | With arg \"^a-zA-Z\", skips nonletters stopping before first letter.\n\ | |
1261 | Returns the distance traveled, either zero or positive.") | |
1262 | (string, lim) | |
1263 | Lisp_Object string, lim; | |
1264 | { | |
1265 | return skip_chars (1, 0, string, lim); | |
1266 | } | |
1267 | ||
1268 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, | |
1269 | "Move point backward, stopping after a char not in STRING, or at pos LIM.\n\ | |
1270 | See `skip-chars-forward' for details.\n\ | |
1271 | Returns the distance traveled, either zero or negative.") | |
1272 | (string, lim) | |
1273 | Lisp_Object string, lim; | |
1274 | { | |
1275 | return skip_chars (0, 0, string, lim); | |
1276 | } | |
1277 | ||
1278 | DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0, | |
1279 | "Move point forward across chars in specified syntax classes.\n\ | |
1280 | SYNTAX is a string of syntax code characters.\n\ | |
1281 | Stop before a char whose syntax is not in SYNTAX, or at position LIM.\n\ | |
1282 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\ | |
1283 | This function returns the distance traveled, either zero or positive.") | |
1284 | (syntax, lim) | |
1285 | Lisp_Object syntax, lim; | |
1286 | { | |
1287 | return skip_chars (1, 1, syntax, lim); | |
1288 | } | |
1289 | ||
1290 | DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0, | |
1291 | "Move point backward across chars in specified syntax classes.\n\ | |
1292 | SYNTAX is a string of syntax code characters.\n\ | |
1293 | Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM.\n\ | |
1294 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\ | |
1295 | This function returns the distance traveled, either zero or negative.") | |
1296 | (syntax, lim) | |
1297 | Lisp_Object syntax, lim; | |
1298 | { | |
1299 | return skip_chars (0, 1, syntax, lim); | |
1300 | } | |
1301 | ||
6a140a74 | 1302 | static Lisp_Object |
195d1361 RS |
1303 | skip_chars (forwardp, syntaxp, string, lim) |
1304 | int forwardp, syntaxp; | |
1305 | Lisp_Object string, lim; | |
1306 | { | |
195d1361 | 1307 | register unsigned int c; |
7e68b0ea | 1308 | register int ch; |
195d1361 | 1309 | unsigned char fastmap[0400]; |
7e68b0ea RS |
1310 | /* If SYNTAXP is 0, STRING may contain multi-byte form of characters |
1311 | of which codes don't fit in FASTMAP. In that case, we set the | |
1312 | first byte of multibyte form (i.e. base leading-code) in FASTMAP | |
1313 | and set the actual ranges of characters in CHAR_RANGES. In the | |
1314 | form "X-Y" of STRING, both X and Y must belong to the same | |
1315 | character set because a range striding across character sets is | |
1316 | meaningless. */ | |
5df4982e | 1317 | int *char_ranges; |
7e68b0ea | 1318 | int n_char_ranges = 0; |
195d1361 | 1319 | int negate = 0; |
4101e6fe | 1320 | register int i, i_byte; |
7e68b0ea | 1321 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
1674d9a2 RS |
1322 | int string_multibyte; |
1323 | int size_byte; | |
195d1361 RS |
1324 | |
1325 | CHECK_STRING (string, 0); | |
5df4982e | 1326 | char_ranges = (int *) alloca (XSTRING (string)->size * (sizeof (int)) * 2); |
1674d9a2 RS |
1327 | string_multibyte = STRING_MULTIBYTE (string); |
1328 | size_byte = STRING_BYTES (XSTRING (string)); | |
195d1361 RS |
1329 | |
1330 | if (NILP (lim)) | |
1331 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1332 | else | |
6a140a74 | 1333 | CHECK_NUMBER_COERCE_MARKER (lim, 0); |
195d1361 RS |
1334 | |
1335 | /* In any case, don't allow scan outside bounds of buffer. */ | |
195d1361 RS |
1336 | if (XINT (lim) > ZV) |
1337 | XSETFASTINT (lim, ZV); | |
1338 | if (XINT (lim) < BEGV) | |
1339 | XSETFASTINT (lim, BEGV); | |
1340 | ||
195d1361 RS |
1341 | bzero (fastmap, sizeof fastmap); |
1342 | ||
4101e6fe RS |
1343 | i = 0, i_byte = 0; |
1344 | ||
13090112 | 1345 | if (i_byte < size_byte |
4101e6fe | 1346 | && XSTRING (string)->data[0] == '^') |
195d1361 | 1347 | { |
4101e6fe | 1348 | negate = 1; i++, i_byte++; |
195d1361 RS |
1349 | } |
1350 | ||
1351 | /* Find the characters specified and set their elements of fastmap. | |
1352 | If syntaxp, each character counts as itself. | |
1353 | Otherwise, handle backslashes and ranges specially. */ | |
1354 | ||
13090112 | 1355 | while (i_byte < size_byte) |
195d1361 | 1356 | { |
4101e6fe RS |
1357 | int c_leading_code; |
1358 | ||
1359 | if (string_multibyte) | |
7e68b0ea | 1360 | { |
4101e6fe RS |
1361 | c_leading_code = XSTRING (string)->data[i_byte]; |
1362 | FETCH_STRING_CHAR_ADVANCE (c, string, i, i_byte); | |
7e68b0ea RS |
1363 | } |
1364 | else | |
13090112 | 1365 | c = c_leading_code = XSTRING (string)->data[i_byte++]; |
4101e6fe RS |
1366 | |
1367 | /* Convert multibyteness between what the string has | |
1368 | and what the buffer has. */ | |
1369 | if (multibyte) | |
b29ff194 | 1370 | c = unibyte_char_to_multibyte (c); |
4101e6fe RS |
1371 | else |
1372 | c &= 0377; | |
1373 | ||
195d1361 | 1374 | if (syntaxp) |
4101e6fe | 1375 | fastmap[syntax_spec_code[c & 0377]] = 1; |
195d1361 RS |
1376 | else |
1377 | { | |
1378 | if (c == '\\') | |
1379 | { | |
13090112 | 1380 | if (i_byte == size_byte) |
4101e6fe RS |
1381 | break; |
1382 | ||
1383 | if (string_multibyte) | |
74cf0beb | 1384 | { |
13090112 | 1385 | c_leading_code = XSTRING (string)->data[i_byte]; |
74cf0beb RS |
1386 | FETCH_STRING_CHAR_ADVANCE (c, string, i, i_byte); |
1387 | } | |
4101e6fe | 1388 | else |
13090112 | 1389 | c = c_leading_code = XSTRING (string)->data[i_byte++]; |
195d1361 | 1390 | } |
13090112 | 1391 | if (i_byte < size_byte |
06274af5 | 1392 | && XSTRING (string)->data[i_byte] == '-') |
195d1361 | 1393 | { |
06274af5 | 1394 | unsigned int c2, c2_leading_code; |
4101e6fe RS |
1395 | |
1396 | /* Skip over the dash. */ | |
1397 | i++, i_byte++; | |
1398 | ||
13090112 | 1399 | if (i_byte == size_byte) |
4101e6fe RS |
1400 | break; |
1401 | ||
1402 | /* Get the end of the range. */ | |
1403 | if (string_multibyte) | |
06274af5 KH |
1404 | { |
1405 | c2_leading_code = XSTRING (string)->data[i_byte]; | |
1406 | FETCH_STRING_CHAR_ADVANCE (c2, string, i, i_byte); | |
1407 | } | |
4101e6fe | 1408 | else |
13090112 | 1409 | c2 = XSTRING (string)->data[i_byte++]; |
7e68b0ea | 1410 | |
4101e6fe | 1411 | if (SINGLE_BYTE_CHAR_P (c)) |
06274af5 KH |
1412 | { |
1413 | if (! SINGLE_BYTE_CHAR_P (c2)) | |
1414 | error ("Invalid charcter range: %s", | |
1415 | XSTRING (string)->data); | |
1416 | while (c <= c2) | |
1417 | { | |
1418 | fastmap[c] = 1; | |
1419 | c++; | |
1420 | } | |
1421 | } | |
7e68b0ea | 1422 | else |
195d1361 | 1423 | { |
06274af5 KH |
1424 | if (c_leading_code != c2_leading_code) |
1425 | error ("Invalid charcter range: %s", | |
1426 | XSTRING (string)->data); | |
4101e6fe RS |
1427 | fastmap[c_leading_code] = 1; |
1428 | if (c <= c2) | |
1429 | { | |
1430 | char_ranges[n_char_ranges++] = c; | |
1431 | char_ranges[n_char_ranges++] = c2; | |
1432 | } | |
195d1361 | 1433 | } |
195d1361 RS |
1434 | } |
1435 | else | |
7e68b0ea | 1436 | { |
4101e6fe RS |
1437 | fastmap[c_leading_code] = 1; |
1438 | if (!SINGLE_BYTE_CHAR_P (c)) | |
7e68b0ea | 1439 | { |
4101e6fe RS |
1440 | char_ranges[n_char_ranges++] = c; |
1441 | char_ranges[n_char_ranges++] = c; | |
7e68b0ea RS |
1442 | } |
1443 | } | |
195d1361 RS |
1444 | } |
1445 | } | |
1446 | ||
7e68b0ea RS |
1447 | /* If ^ was the first character, complement the fastmap. In |
1448 | addition, as all multibyte characters have possibility of | |
1449 | matching, set all entries for base leading codes, which is | |
1450 | harmless even if SYNTAXP is 1. */ | |
195d1361 RS |
1451 | |
1452 | if (negate) | |
1453 | for (i = 0; i < sizeof fastmap; i++) | |
7e68b0ea RS |
1454 | { |
1455 | if (!multibyte || !BASE_LEADING_CODE_P (i)) | |
1456 | fastmap[i] ^= 1; | |
1457 | else | |
1458 | fastmap[i] = 1; | |
1459 | } | |
195d1361 RS |
1460 | |
1461 | { | |
1462 | int start_point = PT; | |
1463 | int pos = PT; | |
6a140a74 | 1464 | int pos_byte = PT_BYTE; |
195d1361 RS |
1465 | |
1466 | immediate_quit = 1; | |
1467 | if (syntaxp) | |
1468 | { | |
1469 | SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1); | |
1470 | if (forwardp) | |
1471 | { | |
7e68b0ea | 1472 | if (multibyte) |
195d1361 | 1473 | { |
ee0cdb48 KH |
1474 | if (pos < XINT (lim)) |
1475 | while (fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))]) | |
1476 | { | |
1477 | /* Since we already checked for multibyteness, | |
1478 | avoid using INC_BOTH which checks again. */ | |
1479 | INC_POS (pos_byte); | |
1480 | pos++; | |
1481 | if (pos >= XINT (lim)) | |
1482 | break; | |
1483 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1484 | } | |
7e68b0ea RS |
1485 | } |
1486 | else | |
1487 | { | |
1488 | while (pos < XINT (lim) | |
1489 | && fastmap[(int) SYNTAX (FETCH_BYTE (pos))]) | |
1490 | { | |
1491 | pos++; | |
1492 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1493 | } | |
195d1361 RS |
1494 | } |
1495 | } | |
1496 | else | |
1497 | { | |
7e68b0ea | 1498 | if (multibyte) |
195d1361 | 1499 | { |
7e68b0ea RS |
1500 | while (pos > XINT (lim)) |
1501 | { | |
6a140a74 | 1502 | int savepos = pos_byte; |
ef316cf0 RS |
1503 | /* Since we already checked for multibyteness, |
1504 | avoid using DEC_BOTH which checks again. */ | |
1505 | pos--; | |
1506 | DEC_POS (pos_byte); | |
4c8535eb | 1507 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); |
6a140a74 | 1508 | if (!fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))]) |
7e68b0ea | 1509 | { |
6a140a74 RS |
1510 | pos++; |
1511 | pos_byte = savepos; | |
7e68b0ea RS |
1512 | break; |
1513 | } | |
7e68b0ea RS |
1514 | } |
1515 | } | |
1516 | else | |
1517 | { | |
ee0cdb48 KH |
1518 | if (pos > XINT (lim)) |
1519 | while (fastmap[(int) SYNTAX (FETCH_BYTE (pos - 1))]) | |
1520 | { | |
1521 | pos--; | |
1522 | if (pos <= XINT (lim)) | |
4c8535eb | 1523 | break; |
ee0cdb48 KH |
1524 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
1525 | } | |
195d1361 RS |
1526 | } |
1527 | } | |
1528 | } | |
1529 | else | |
1530 | { | |
1531 | if (forwardp) | |
1532 | { | |
7e68b0ea | 1533 | if (multibyte) |
6a140a74 | 1534 | while (pos < XINT (lim) && fastmap[(c = FETCH_BYTE (pos_byte))]) |
7e68b0ea RS |
1535 | { |
1536 | if (!BASE_LEADING_CODE_P (c)) | |
6a140a74 | 1537 | INC_BOTH (pos, pos_byte); |
7e68b0ea RS |
1538 | else if (n_char_ranges) |
1539 | { | |
1540 | /* We much check CHAR_RANGES for a multibyte | |
1541 | character. */ | |
6a140a74 | 1542 | ch = FETCH_MULTIBYTE_CHAR (pos_byte); |
7e68b0ea RS |
1543 | for (i = 0; i < n_char_ranges; i += 2) |
1544 | if ((ch >= char_ranges[i] && ch <= char_ranges[i + 1])) | |
1545 | break; | |
1546 | if (!(negate ^ (i < n_char_ranges))) | |
1547 | break; | |
1548 | ||
6a140a74 | 1549 | INC_BOTH (pos, pos_byte); |
7e68b0ea RS |
1550 | } |
1551 | else | |
1552 | { | |
1553 | if (!negate) break; | |
6a140a74 | 1554 | INC_BOTH (pos, pos_byte); |
7e68b0ea RS |
1555 | } |
1556 | } | |
1557 | else | |
1558 | while (pos < XINT (lim) && fastmap[FETCH_BYTE (pos)]) | |
1559 | pos++; | |
195d1361 RS |
1560 | } |
1561 | else | |
1562 | { | |
7e68b0ea RS |
1563 | if (multibyte) |
1564 | while (pos > XINT (lim)) | |
1565 | { | |
6a140a74 RS |
1566 | int savepos = pos_byte; |
1567 | DEC_BOTH (pos, pos_byte); | |
1568 | if (fastmap[(c = FETCH_BYTE (pos_byte))]) | |
7e68b0ea RS |
1569 | { |
1570 | if (!BASE_LEADING_CODE_P (c)) | |
1571 | ; | |
1572 | else if (n_char_ranges) | |
1573 | { | |
1574 | /* We much check CHAR_RANGES for a multibyte | |
1575 | character. */ | |
6a140a74 | 1576 | ch = FETCH_MULTIBYTE_CHAR (pos_byte); |
7e68b0ea RS |
1577 | for (i = 0; i < n_char_ranges; i += 2) |
1578 | if (ch >= char_ranges[i] && ch <= char_ranges[i + 1]) | |
1579 | break; | |
1580 | if (!(negate ^ (i < n_char_ranges))) | |
1581 | { | |
6a140a74 RS |
1582 | pos++; |
1583 | pos_byte = savepos; | |
7e68b0ea RS |
1584 | break; |
1585 | } | |
1586 | } | |
1587 | else | |
1588 | if (!negate) | |
1589 | { | |
6a140a74 RS |
1590 | pos++; |
1591 | pos_byte = savepos; | |
7e68b0ea RS |
1592 | break; |
1593 | } | |
1594 | } | |
1595 | else | |
1596 | { | |
6a140a74 RS |
1597 | pos++; |
1598 | pos_byte = savepos; | |
7e68b0ea RS |
1599 | break; |
1600 | } | |
1601 | } | |
1602 | else | |
1603 | while (pos > XINT (lim) && fastmap[FETCH_BYTE (pos - 1)]) | |
1604 | pos--; | |
195d1361 RS |
1605 | } |
1606 | } | |
7e68b0ea | 1607 | |
6a140a74 RS |
1608 | #if 0 /* Not needed now that a position in mid-character |
1609 | cannot be specified in Lisp. */ | |
7e68b0ea RS |
1610 | if (multibyte |
1611 | /* INC_POS or DEC_POS might have moved POS over LIM. */ | |
1612 | && (forwardp ? (pos > XINT (lim)) : (pos < XINT (lim)))) | |
1613 | pos = XINT (lim); | |
6a140a74 | 1614 | #endif |
7e68b0ea | 1615 | |
6a140a74 RS |
1616 | if (! multibyte) |
1617 | pos_byte = pos; | |
1618 | ||
1619 | SET_PT_BOTH (pos, pos_byte); | |
195d1361 RS |
1620 | immediate_quit = 0; |
1621 | ||
1622 | return make_number (PT - start_point); | |
1623 | } | |
1624 | } | |
1625 | \f | |
95ff8dfc RS |
1626 | /* Jump over a comment, assuming we are at the beginning of one. |
1627 | FROM is the current position. | |
1628 | FROM_BYTE is the bytepos corresponding to FROM. | |
1629 | Do not move past STOP (a charpos). | |
1630 | The comment over which we have to jump is of style STYLE | |
1631 | (either SYNTAX_COMMENT_STYLE(foo) or ST_COMMENT_STYLE). | |
1632 | NESTING should be positive to indicate the nesting at the beginning | |
1633 | for nested comments and should be zero or negative else. | |
1634 | ST_COMMENT_STYLE cannot be nested. | |
1635 | PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character | |
1636 | (or 0 If the search cannot start in the middle of a two-character). | |
1637 | ||
1638 | If successful, return 1 and store the charpos of the comment's end | |
1639 | into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR. | |
1640 | Else, return 0 and store the charpos STOP into *CHARPOS_PTR, the | |
1641 | corresponding bytepos into *BYTEPOS_PTR and the current nesting | |
1642 | (as defined for state.incomment) in *INCOMMENT_PTR. | |
1643 | ||
1644 | The comment end is the last character of the comment rather than the | |
1645 | character just after the comment. | |
1646 | ||
1647 | Global syntax data is assumed to initially be valid for FROM and | |
1648 | remains valid for forward search starting at the returned position. */ | |
1649 | ||
1650 | static int | |
1651 | forw_comment (from, from_byte, stop, nesting, style, prev_syntax, | |
1652 | charpos_ptr, bytepos_ptr, incomment_ptr) | |
1653 | int from, from_byte, stop; | |
1654 | int nesting, style, prev_syntax; | |
1655 | int *charpos_ptr, *bytepos_ptr, *incomment_ptr; | |
1656 | { | |
1657 | register int c, c1; | |
1658 | register enum syntaxcode code; | |
1659 | register int syntax; | |
1660 | ||
1661 | if (nesting <= 0) nesting = -1; | |
1662 | ||
1663 | /* Enter the loop in the middle so that we find | |
1664 | a 2-char comment ender if we start in the middle of it. */ | |
1665 | syntax = prev_syntax; | |
1666 | if (syntax != 0) goto forw_incomment; | |
1667 | ||
1668 | while (1) | |
1669 | { | |
1670 | if (from == stop) | |
1671 | { | |
1672 | *incomment_ptr = nesting; | |
1673 | *charpos_ptr = from; | |
1674 | *bytepos_ptr = from_byte; | |
1675 | return 0; | |
1676 | } | |
1677 | c = FETCH_CHAR (from_byte); | |
1678 | syntax = SYNTAX_WITH_FLAGS (c); | |
1679 | code = syntax & 0xff; | |
1680 | if (code == Sendcomment | |
1681 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
1682 | && --nesting <= 0) | |
1683 | /* we have encountered a comment end of the same style | |
1684 | as the comment sequence which began this comment | |
1685 | section */ | |
1686 | break; | |
1687 | if (code == Scomment_fence | |
1688 | && style == ST_COMMENT_STYLE) | |
1689 | /* we have encountered a comment end of the same style | |
1690 | as the comment sequence which began this comment | |
1691 | section. */ | |
1692 | break; | |
1693 | if (nesting > 0 | |
1694 | && code == Scomment | |
1695 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style) | |
1696 | /* we have encountered a nested comment of the same style | |
1697 | as the comment sequence which began this comment section */ | |
1698 | nesting++; | |
1699 | INC_BOTH (from, from_byte); | |
1700 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1701 | ||
1702 | forw_incomment: | |
1703 | if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
1704 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
1705 | && (c1 = FETCH_CHAR (from_byte), | |
1706 | SYNTAX_COMEND_SECOND (c1))) | |
4ffe723b GM |
1707 | { |
1708 | if (--nesting <= 0) | |
1709 | /* we have encountered a comment end of the same style | |
1710 | as the comment sequence which began this comment | |
1711 | section */ | |
1712 | break; | |
1713 | else | |
1714 | { | |
1715 | INC_BOTH (from, from_byte); | |
1716 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1717 | } | |
1718 | } | |
95ff8dfc RS |
1719 | if (nesting > 0 |
1720 | && from < stop | |
1721 | && SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
1722 | && (c1 = FETCH_CHAR (from_byte), | |
1723 | SYNTAX_COMMENT_STYLE (c1) == style | |
1724 | && SYNTAX_COMSTART_SECOND (c1))) | |
1725 | /* we have encountered a nested comment of the same style | |
1726 | as the comment sequence which began this comment | |
1727 | section */ | |
1728 | { | |
1729 | INC_BOTH (from, from_byte); | |
1730 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1731 | nesting++; | |
1732 | } | |
1733 | } | |
1734 | *charpos_ptr = from; | |
1735 | *bytepos_ptr = from_byte; | |
1736 | return 1; | |
1737 | } | |
1738 | ||
b3cfe0c8 RS |
1739 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
1740 | "Move forward across up to N comments. If N is negative, move backward.\n\ | |
b3cfe0c8 | 1741 | Stop scanning if we find something other than a comment or whitespace.\n\ |
c81a3712 | 1742 | Set point to where scanning stops.\n\ |
b3cfe0c8 RS |
1743 | If N comments are found as expected, with nothing except whitespace\n\ |
1744 | between them, return t; otherwise return nil.") | |
1745 | (count) | |
840f481c | 1746 | Lisp_Object count; |
b3cfe0c8 RS |
1747 | { |
1748 | register int from; | |
6a140a74 | 1749 | int from_byte; |
b3cfe0c8 | 1750 | register int stop; |
8ea151b2 | 1751 | register int c, c1; |
b3cfe0c8 RS |
1752 | register enum syntaxcode code; |
1753 | int comstyle = 0; /* style of comment encountered */ | |
95ff8dfc | 1754 | int comnested = 0; /* whether the comment is nestable or not */ |
be720845 | 1755 | int found; |
840f481c | 1756 | int count1; |
6a140a74 | 1757 | int out_charpos, out_bytepos; |
95ff8dfc | 1758 | int dummy; |
840f481c RS |
1759 | |
1760 | CHECK_NUMBER (count, 0); | |
1761 | count1 = XINT (count); | |
195d1361 | 1762 | stop = count1 > 0 ? ZV : BEGV; |
b3cfe0c8 RS |
1763 | |
1764 | immediate_quit = 1; | |
1765 | QUIT; | |
1766 | ||
1767 | from = PT; | |
6a140a74 | 1768 | from_byte = PT_BYTE; |
b3cfe0c8 | 1769 | |
195d1361 | 1770 | SETUP_SYNTAX_TABLE (from, count1); |
840f481c | 1771 | while (count1 > 0) |
b3cfe0c8 | 1772 | { |
04882296 | 1773 | do |
b3cfe0c8 | 1774 | { |
f902a008 RS |
1775 | int comstart_first; |
1776 | ||
04882296 KH |
1777 | if (from == stop) |
1778 | { | |
ef316cf0 | 1779 | SET_PT_BOTH (from, from_byte); |
b7e6e612 | 1780 | immediate_quit = 0; |
04882296 KH |
1781 | return Qnil; |
1782 | } | |
6a140a74 | 1783 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 | 1784 | code = SYNTAX (c); |
f902a008 | 1785 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 1786 | comnested = SYNTAX_COMMENT_NESTED (c); |
6a140a74 | 1787 | INC_BOTH (from, from_byte); |
f902a008 | 1788 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 1789 | comstyle = 0; |
f902a008 | 1790 | if (from < stop && comstart_first |
6a140a74 | 1791 | && (c1 = FETCH_CHAR (from_byte), |
8ea151b2 | 1792 | SYNTAX_COMSTART_SECOND (c1))) |
b3cfe0c8 | 1793 | { |
7fc8191e RS |
1794 | /* We have encountered a comment start sequence and we |
1795 | are ignoring all text inside comments. We must record | |
b3cfe0c8 RS |
1796 | the comment style this sequence begins so that later, |
1797 | only a comment end of the same style actually ends | |
7fc8191e | 1798 | the comment section. */ |
b3cfe0c8 | 1799 | code = Scomment; |
8ea151b2 | 1800 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
95ff8dfc | 1801 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); |
6a140a74 | 1802 | INC_BOTH (from, from_byte); |
95ff8dfc | 1803 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 1804 | } |
04882296 KH |
1805 | } |
1806 | while (code == Swhitespace || code == Sendcomment); | |
6a140a74 | 1807 | |
da71ab91 KH |
1808 | if (code == Scomment_fence) |
1809 | comstyle = ST_COMMENT_STYLE; | |
1810 | else if (code != Scomment) | |
04882296 KH |
1811 | { |
1812 | immediate_quit = 0; | |
6a140a74 | 1813 | DEC_BOTH (from, from_byte); |
ef316cf0 | 1814 | SET_PT_BOTH (from, from_byte); |
04882296 KH |
1815 | return Qnil; |
1816 | } | |
1817 | /* We're at the start of a comment. */ | |
95ff8dfc RS |
1818 | found = forw_comment (from, from_byte, stop, comnested, comstyle, 0, |
1819 | &out_charpos, &out_bytepos, &dummy); | |
1820 | from = out_charpos; from_byte = out_bytepos; | |
1821 | if (!found) | |
04882296 | 1822 | { |
95ff8dfc RS |
1823 | immediate_quit = 0; |
1824 | SET_PT_BOTH (from, from_byte); | |
1825 | return Qnil; | |
b3cfe0c8 | 1826 | } |
95ff8dfc RS |
1827 | INC_BOTH (from, from_byte); |
1828 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
04882296 | 1829 | /* We have skipped one comment. */ |
840f481c | 1830 | count1--; |
b3cfe0c8 RS |
1831 | } |
1832 | ||
840f481c | 1833 | while (count1 < 0) |
b3cfe0c8 | 1834 | { |
b9145dbb | 1835 | while (1) |
b3cfe0c8 | 1836 | { |
f902a008 RS |
1837 | int quoted, comstart_second; |
1838 | ||
b9145dbb RS |
1839 | if (from <= stop) |
1840 | { | |
6a140a74 | 1841 | SET_PT_BOTH (BEGV, BEGV_BYTE); |
b9145dbb RS |
1842 | immediate_quit = 0; |
1843 | return Qnil; | |
1844 | } | |
b3cfe0c8 | 1845 | |
6a140a74 | 1846 | DEC_BOTH (from, from_byte); |
f902a008 | 1847 | /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */ |
6a140a74 | 1848 | quoted = char_quoted (from, from_byte); |
b3cfe0c8 | 1849 | if (quoted) |
195d1361 | 1850 | { |
6a140a74 RS |
1851 | DEC_BOTH (from, from_byte); |
1852 | goto leave; | |
195d1361 | 1853 | } |
6a140a74 | 1854 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 RS |
1855 | code = SYNTAX (c); |
1856 | comstyle = 0; | |
95ff8dfc | 1857 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
1858 | if (code == Sendcomment) |
1859 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
f902a008 | 1860 | comstart_second = SYNTAX_COMSTART_SECOND (c); |
b3cfe0c8 | 1861 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
f902a008 | 1862 | && prev_char_comend_first (from, from_byte) |
89c6809a | 1863 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
b3cfe0c8 | 1864 | { |
7fc8191e | 1865 | /* We must record the comment style encountered so that |
b3cfe0c8 | 1866 | later, we can match only the proper comment begin |
7fc8191e | 1867 | sequence of the same style. */ |
6a140a74 | 1868 | DEC_BOTH (from, from_byte); |
f902a008 RS |
1869 | code = Sendcomment; |
1870 | /* Calling char_quoted, above, set up global syntax position | |
1871 | at the new value of FROM. */ | |
95ff8dfc RS |
1872 | c1 = FETCH_CHAR (from_byte); |
1873 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
1874 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
b3cfe0c8 | 1875 | } |
f902a008 RS |
1876 | if (from > stop && comstart_second |
1877 | && prev_char_comstart_first (from, from_byte) | |
89c6809a | 1878 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
ae03af34 | 1879 | { |
ae03af34 | 1880 | code = Scomment; |
6a140a74 | 1881 | DEC_BOTH (from, from_byte); |
ae03af34 | 1882 | } |
b3cfe0c8 | 1883 | |
195d1361 RS |
1884 | if (code == Scomment_fence) |
1885 | { | |
1886 | /* Skip until first preceding unquoted comment_fence. */ | |
6a140a74 | 1887 | int found = 0, ini = from, ini_byte = from_byte; |
195d1361 | 1888 | |
6a140a74 | 1889 | while (1) |
195d1361 | 1890 | { |
6a140a74 RS |
1891 | DEC_BOTH (from, from_byte); |
1892 | if (from == stop) | |
1893 | break; | |
195d1361 | 1894 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 RS |
1895 | c = FETCH_CHAR (from_byte); |
1896 | if (SYNTAX (c) == Scomment_fence | |
1897 | && !char_quoted (from, from_byte)) | |
195d1361 RS |
1898 | { |
1899 | found = 1; | |
1900 | break; | |
1901 | } | |
1902 | } | |
1903 | if (found == 0) | |
1904 | { | |
1905 | from = ini; /* Set point to ini + 1. */ | |
6a140a74 | 1906 | from_byte = ini_byte; |
195d1361 RS |
1907 | goto leave; |
1908 | } | |
1909 | } | |
1910 | else if (code == Sendcomment) | |
b3cfe0c8 | 1911 | { |
95ff8dfc | 1912 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 RS |
1913 | &out_charpos, &out_bytepos); |
1914 | if (found != -1) | |
1915 | from = out_charpos, from_byte = out_bytepos; | |
7fc8191e RS |
1916 | /* We have skipped one comment. */ |
1917 | break; | |
b3cfe0c8 | 1918 | } |
195d1361 | 1919 | else if (code != Swhitespace && code != Scomment) |
b3cfe0c8 | 1920 | { |
195d1361 | 1921 | leave: |
b3cfe0c8 | 1922 | immediate_quit = 0; |
6a140a74 | 1923 | INC_BOTH (from, from_byte); |
ef316cf0 | 1924 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
1925 | return Qnil; |
1926 | } | |
1927 | } | |
1928 | ||
840f481c | 1929 | count1++; |
b3cfe0c8 RS |
1930 | } |
1931 | ||
ef316cf0 | 1932 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
1933 | immediate_quit = 0; |
1934 | return Qt; | |
1935 | } | |
1936 | \f | |
6a140a74 | 1937 | static Lisp_Object |
8489eb67 RS |
1938 | scan_lists (from, count, depth, sexpflag) |
1939 | register int from; | |
1940 | int count, depth, sexpflag; | |
1941 | { | |
1942 | Lisp_Object val; | |
195d1361 | 1943 | register int stop = count > 0 ? ZV : BEGV; |
93da5fff KH |
1944 | register int c, c1; |
1945 | int stringterm; | |
8489eb67 RS |
1946 | int quoted; |
1947 | int mathexit = 0; | |
93da5fff | 1948 | register enum syntaxcode code, temp_code; |
195d1361 | 1949 | int min_depth = depth; /* Err out if depth gets less than this. */ |
e5d4f4dc | 1950 | int comstyle = 0; /* style of comment encountered */ |
95ff8dfc | 1951 | int comnested = 0; /* whether the comment is nestable or not */ |
93da5fff | 1952 | int temp_pos; |
7bf5e9e4 | 1953 | int last_good = from; |
195d1361 | 1954 | int found; |
c3907a7e | 1955 | int from_byte; |
6a140a74 | 1956 | int out_bytepos, out_charpos; |
95ff8dfc | 1957 | int temp, dummy; |
8489eb67 RS |
1958 | |
1959 | if (depth > 0) min_depth = 0; | |
1960 | ||
c3907a7e RS |
1961 | if (from > ZV) from = ZV; |
1962 | if (from < BEGV) from = BEGV; | |
1963 | ||
1964 | from_byte = CHAR_TO_BYTE (from); | |
1965 | ||
8489eb67 RS |
1966 | immediate_quit = 1; |
1967 | QUIT; | |
1968 | ||
195d1361 | 1969 | SETUP_SYNTAX_TABLE (from, count); |
8489eb67 RS |
1970 | while (count > 0) |
1971 | { | |
8489eb67 RS |
1972 | while (from < stop) |
1973 | { | |
f902a008 | 1974 | int comstart_first, prefix; |
195d1361 | 1975 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1976 | c = FETCH_CHAR (from_byte); |
e5d4f4dc | 1977 | code = SYNTAX (c); |
f902a008 | 1978 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 1979 | comnested = SYNTAX_COMMENT_NESTED (c); |
f902a008 | 1980 | prefix = SYNTAX_PREFIX (c); |
7bf5e9e4 RS |
1981 | if (depth == min_depth) |
1982 | last_good = from; | |
6a140a74 | 1983 | INC_BOTH (from, from_byte); |
195d1361 | 1984 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 1985 | if (from < stop && comstart_first |
6a140a74 | 1986 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from_byte)) |
8489eb67 | 1987 | && parse_sexp_ignore_comments) |
e5d4f4dc RS |
1988 | { |
1989 | /* we have encountered a comment start sequence and we | |
195d1361 | 1990 | are ignoring all text inside comments. We must record |
e5d4f4dc RS |
1991 | the comment style this sequence begins so that later, |
1992 | only a comment end of the same style actually ends | |
1993 | the comment section */ | |
1994 | code = Scomment; | |
95ff8dfc RS |
1995 | c1 = FETCH_CHAR (from_byte); |
1996 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
1997 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
6a140a74 | 1998 | INC_BOTH (from, from_byte); |
f902a008 | 1999 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
e5d4f4dc RS |
2000 | } |
2001 | ||
f902a008 | 2002 | if (prefix) |
8489eb67 RS |
2003 | continue; |
2004 | ||
0220c518 | 2005 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2006 | { |
2007 | case Sescape: | |
2008 | case Scharquote: | |
2009 | if (from == stop) goto lose; | |
6a140a74 | 2010 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2011 | /* treat following character as a word constituent */ |
2012 | case Sword: | |
2013 | case Ssymbol: | |
2014 | if (depth || !sexpflag) break; | |
195d1361 | 2015 | /* This word counts as a sexp; return at end of it. */ |
8489eb67 RS |
2016 | while (from < stop) |
2017 | { | |
195d1361 | 2018 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
7c7ca3d2 RS |
2019 | |
2020 | /* Some compilers can't handle this inside the switch. */ | |
2021 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2022 | switch (temp) | |
8489eb67 RS |
2023 | { |
2024 | case Scharquote: | |
2025 | case Sescape: | |
6a140a74 | 2026 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2027 | if (from == stop) goto lose; |
2028 | break; | |
2029 | case Sword: | |
2030 | case Ssymbol: | |
2031 | case Squote: | |
2032 | break; | |
2033 | default: | |
2034 | goto done; | |
2035 | } | |
6a140a74 | 2036 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2037 | } |
2038 | goto done; | |
2039 | ||
195d1361 | 2040 | case Scomment_fence: |
95ff8dfc RS |
2041 | comstyle = ST_COMMENT_STYLE; |
2042 | /* FALLTHROUGH */ | |
2043 | case Scomment: | |
8489eb67 | 2044 | if (!parse_sexp_ignore_comments) break; |
95ff8dfc RS |
2045 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2046 | found = forw_comment (from, from_byte, stop, | |
2047 | comnested, comstyle, 0, | |
2048 | &out_charpos, &out_bytepos, &dummy); | |
2049 | from = out_charpos, from_byte = out_bytepos; | |
2050 | if (!found) | |
8489eb67 | 2051 | { |
95ff8dfc RS |
2052 | if (depth == 0) |
2053 | goto done; | |
2054 | goto lose; | |
8489eb67 | 2055 | } |
95ff8dfc RS |
2056 | INC_BOTH (from, from_byte); |
2057 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
8489eb67 RS |
2058 | break; |
2059 | ||
2060 | case Smath: | |
2061 | if (!sexpflag) | |
2062 | break; | |
6a140a74 RS |
2063 | if (from != stop && c == FETCH_CHAR (from_byte)) |
2064 | { | |
2065 | INC_BOTH (from, from_byte); | |
2066 | } | |
8489eb67 RS |
2067 | if (mathexit) |
2068 | { | |
2069 | mathexit = 0; | |
2070 | goto close1; | |
2071 | } | |
2072 | mathexit = 1; | |
2073 | ||
2074 | case Sopen: | |
2075 | if (!++depth) goto done; | |
2076 | break; | |
2077 | ||
2078 | case Sclose: | |
2079 | close1: | |
2080 | if (!--depth) goto done; | |
2081 | if (depth < min_depth) | |
7bf5e9e4 RS |
2082 | Fsignal (Qscan_error, |
2083 | Fcons (build_string ("Containing expression ends prematurely"), | |
2084 | Fcons (make_number (last_good), | |
2085 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2086 | break; |
2087 | ||
2088 | case Sstring: | |
195d1361 | 2089 | case Sstring_fence: |
ef316cf0 | 2090 | temp_pos = dec_bytepos (from_byte); |
93da5fff | 2091 | stringterm = FETCH_CHAR (temp_pos); |
8489eb67 RS |
2092 | while (1) |
2093 | { | |
2094 | if (from >= stop) goto lose; | |
195d1361 RS |
2095 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2096 | if (code == Sstring | |
6a140a74 RS |
2097 | ? (FETCH_CHAR (from_byte) == stringterm) |
2098 | : SYNTAX (FETCH_CHAR (from_byte)) == Sstring_fence) | |
195d1361 | 2099 | break; |
7c7ca3d2 RS |
2100 | |
2101 | /* Some compilers can't handle this inside the switch. */ | |
2102 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2103 | switch (temp) | |
8489eb67 RS |
2104 | { |
2105 | case Scharquote: | |
2106 | case Sescape: | |
6a140a74 | 2107 | INC_BOTH (from, from_byte); |
8489eb67 | 2108 | } |
6a140a74 | 2109 | INC_BOTH (from, from_byte); |
8489eb67 | 2110 | } |
6a140a74 | 2111 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2112 | if (!depth && sexpflag) goto done; |
2113 | break; | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | /* Reached end of buffer. Error if within object, return nil if between */ | |
2118 | if (depth) goto lose; | |
2119 | ||
2120 | immediate_quit = 0; | |
2121 | return Qnil; | |
2122 | ||
2123 | /* End of object reached */ | |
2124 | done: | |
2125 | count--; | |
2126 | } | |
2127 | ||
2128 | while (count < 0) | |
2129 | { | |
8489eb67 RS |
2130 | while (from > stop) |
2131 | { | |
6a140a74 | 2132 | DEC_BOTH (from, from_byte); |
195d1361 | 2133 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 2134 | c = FETCH_CHAR (from_byte); |
8489eb67 | 2135 | code = SYNTAX (c); |
7bf5e9e4 RS |
2136 | if (depth == min_depth) |
2137 | last_good = from; | |
7fc8191e | 2138 | comstyle = 0; |
95ff8dfc | 2139 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2140 | if (code == Sendcomment) |
2141 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 | 2142 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1674d9a2 | 2143 | && prev_char_comend_first (from, from_byte) |
8489eb67 | 2144 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2145 | { |
f902a008 | 2146 | /* We must record the comment style encountered so that |
e5d4f4dc | 2147 | later, we can match only the proper comment begin |
f902a008 | 2148 | sequence of the same style. */ |
6a140a74 | 2149 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2150 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
2151 | code = Sendcomment; | |
95ff8dfc RS |
2152 | c1 = FETCH_CHAR (from_byte); |
2153 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
2154 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
e5d4f4dc RS |
2155 | } |
2156 | ||
9828a477 | 2157 | /* Quoting turns anything except a comment-ender |
f902a008 RS |
2158 | into a word character. Note that this if cannot be true |
2159 | if we decremented FROM in the if-statement above. */ | |
9828a477 KH |
2160 | if (code != Sendcomment && char_quoted (from, from_byte)) |
2161 | code = Sword; | |
2162 | else if (SYNTAX_PREFIX (c)) | |
8489eb67 RS |
2163 | continue; |
2164 | ||
9828a477 | 2165 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2166 | { |
2167 | case Sword: | |
2168 | case Ssymbol: | |
9828a477 KH |
2169 | case Sescape: |
2170 | case Scharquote: | |
8489eb67 | 2171 | if (depth || !sexpflag) break; |
195d1361 RS |
2172 | /* This word counts as a sexp; count object finished |
2173 | after passing it. */ | |
8489eb67 RS |
2174 | while (from > stop) |
2175 | { | |
6a140a74 | 2176 | temp_pos = from_byte; |
ef316cf0 RS |
2177 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2178 | DEC_POS (temp_pos); | |
2179 | else | |
2180 | temp_pos--; | |
6a140a74 | 2181 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
9828a477 KH |
2182 | c1 = FETCH_CHAR (temp_pos); |
2183 | temp_code = SYNTAX (c1); | |
2184 | /* Don't allow comment-end to be quoted. */ | |
2185 | if (temp_code == Sendcomment) | |
2186 | goto done2; | |
6a140a74 | 2187 | quoted = char_quoted (from - 1, temp_pos); |
8489eb67 | 2188 | if (quoted) |
93da5fff | 2189 | { |
6a140a74 | 2190 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2191 | temp_pos = dec_bytepos (temp_pos); |
6a140a74 | 2192 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff KH |
2193 | } |
2194 | c1 = FETCH_CHAR (temp_pos); | |
2195 | temp_code = SYNTAX (c1); | |
2196 | if (! (quoted || temp_code == Sword | |
2197 | || temp_code == Ssymbol | |
2198 | || temp_code == Squote)) | |
8489eb67 | 2199 | goto done2; |
6a140a74 | 2200 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2201 | } |
2202 | goto done2; | |
2203 | ||
2204 | case Smath: | |
2205 | if (!sexpflag) | |
2206 | break; | |
ef316cf0 | 2207 | temp_pos = dec_bytepos (from_byte); |
6a140a74 | 2208 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff | 2209 | if (from != stop && c == FETCH_CHAR (temp_pos)) |
6a140a74 | 2210 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2211 | if (mathexit) |
2212 | { | |
2213 | mathexit = 0; | |
2214 | goto open2; | |
2215 | } | |
2216 | mathexit = 1; | |
2217 | ||
2218 | case Sclose: | |
2219 | if (!++depth) goto done2; | |
2220 | break; | |
2221 | ||
2222 | case Sopen: | |
2223 | open2: | |
2224 | if (!--depth) goto done2; | |
2225 | if (depth < min_depth) | |
7bf5e9e4 RS |
2226 | Fsignal (Qscan_error, |
2227 | Fcons (build_string ("Containing expression ends prematurely"), | |
2228 | Fcons (make_number (last_good), | |
2229 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2230 | break; |
2231 | ||
2232 | case Sendcomment: | |
2233 | if (!parse_sexp_ignore_comments) | |
2234 | break; | |
95ff8dfc | 2235 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 RS |
2236 | &out_charpos, &out_bytepos); |
2237 | if (found != -1) | |
2238 | from = out_charpos, from_byte = out_bytepos; | |
8489eb67 RS |
2239 | break; |
2240 | ||
195d1361 RS |
2241 | case Scomment_fence: |
2242 | case Sstring_fence: | |
2243 | while (1) | |
2244 | { | |
6a140a74 | 2245 | DEC_BOTH (from, from_byte); |
195d1361 RS |
2246 | if (from == stop) goto lose; |
2247 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
6a140a74 RS |
2248 | if (!char_quoted (from, from_byte) |
2249 | && SYNTAX (FETCH_CHAR (from_byte)) == code) | |
195d1361 RS |
2250 | break; |
2251 | } | |
2252 | if (code == Sstring_fence && !depth && sexpflag) goto done2; | |
2253 | break; | |
2254 | ||
8489eb67 | 2255 | case Sstring: |
6a140a74 | 2256 | stringterm = FETCH_CHAR (from_byte); |
8489eb67 RS |
2257 | while (1) |
2258 | { | |
2259 | if (from == stop) goto lose; | |
6a140a74 | 2260 | temp_pos = from_byte; |
ef316cf0 RS |
2261 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2262 | DEC_POS (temp_pos); | |
2263 | else | |
2264 | temp_pos--; | |
6a140a74 RS |
2265 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
2266 | if (!char_quoted (from - 1, temp_pos) | |
93da5fff | 2267 | && stringterm == FETCH_CHAR (temp_pos)) |
8489eb67 | 2268 | break; |
6a140a74 | 2269 | DEC_BOTH (from, from_byte); |
8489eb67 | 2270 | } |
6a140a74 | 2271 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2272 | if (!depth && sexpflag) goto done2; |
2273 | break; | |
2274 | } | |
2275 | } | |
2276 | ||
2277 | /* Reached start of buffer. Error if within object, return nil if between */ | |
2278 | if (depth) goto lose; | |
2279 | ||
2280 | immediate_quit = 0; | |
2281 | return Qnil; | |
2282 | ||
2283 | done2: | |
2284 | count++; | |
2285 | } | |
2286 | ||
2287 | ||
2288 | immediate_quit = 0; | |
1e142fb7 | 2289 | XSETFASTINT (val, from); |
8489eb67 RS |
2290 | return val; |
2291 | ||
2292 | lose: | |
7bf5e9e4 RS |
2293 | Fsignal (Qscan_error, |
2294 | Fcons (build_string ("Unbalanced parentheses"), | |
2295 | Fcons (make_number (last_good), | |
2296 | Fcons (make_number (from), Qnil)))); | |
2297 | ||
8489eb67 RS |
2298 | /* NOTREACHED */ |
2299 | } | |
2300 | ||
8489eb67 RS |
2301 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, |
2302 | "Scan from character number FROM by COUNT lists.\n\ | |
2303 | Returns the character number of the position thus found.\n\ | |
2304 | \n\ | |
2305 | If DEPTH is nonzero, paren depth begins counting from that value,\n\ | |
2306 | only places where the depth in parentheses becomes zero\n\ | |
2307 | are candidates for stopping; COUNT such places are counted.\n\ | |
2308 | Thus, a positive value for DEPTH means go out levels.\n\ | |
2309 | \n\ | |
2310 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
2311 | \n\ | |
2312 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
2313 | and the depth is wrong, an error is signaled.\n\ | |
2314 | If the depth is right but the count is not used up, nil is returned.") | |
2315 | (from, count, depth) | |
2316 | Lisp_Object from, count, depth; | |
2317 | { | |
2318 | CHECK_NUMBER (from, 0); | |
2319 | CHECK_NUMBER (count, 1); | |
2320 | CHECK_NUMBER (depth, 2); | |
2321 | ||
2322 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
2323 | } | |
2324 | ||
2325 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
2326 | "Scan from character number FROM by COUNT balanced expressions.\n\ | |
2327 | If COUNT is negative, scan backwards.\n\ | |
2328 | Returns the character number of the position thus found.\n\ | |
2329 | \n\ | |
2330 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
2331 | \n\ | |
2332 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
2333 | in the middle of a parenthetical grouping, an error is signaled.\n\ | |
2334 | If the beginning or end is reached between groupings\n\ | |
2335 | but before count is used up, nil is returned.") | |
2336 | (from, count) | |
2337 | Lisp_Object from, count; | |
2338 | { | |
2339 | CHECK_NUMBER (from, 0); | |
2340 | CHECK_NUMBER (count, 1); | |
2341 | ||
2342 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
2343 | } | |
2344 | ||
2345 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
2346 | 0, 0, 0, | |
2347 | "Move point backward over any number of chars with prefix syntax.\n\ | |
2348 | This includes chars with \"quote\" or \"prefix\" syntax (' or p).") | |
2349 | () | |
2350 | { | |
2351 | int beg = BEGV; | |
6a140a74 RS |
2352 | int opoint = PT; |
2353 | int opoint_byte = PT_BYTE; | |
6ec8bbd2 | 2354 | int pos = PT; |
6a140a74 | 2355 | int pos_byte = PT_BYTE; |
93da5fff | 2356 | int c; |
93da5fff | 2357 | |
f902a008 | 2358 | if (pos <= beg) |
195d1361 | 2359 | { |
f902a008 RS |
2360 | SET_PT_BOTH (opoint, opoint_byte); |
2361 | ||
2362 | return Qnil; | |
195d1361 | 2363 | } |
8489eb67 | 2364 | |
f902a008 RS |
2365 | SETUP_SYNTAX_TABLE (pos, -1); |
2366 | ||
6a140a74 RS |
2367 | DEC_BOTH (pos, pos_byte); |
2368 | ||
1fd3172d | 2369 | while (!char_quoted (pos, pos_byte) |
195d1361 | 2370 | /* Previous statement updates syntax table. */ |
6a140a74 | 2371 | && ((c = FETCH_CHAR (pos_byte), SYNTAX (c) == Squote) |
93da5fff KH |
2372 | || SYNTAX_PREFIX (c))) |
2373 | { | |
1fd3172d RS |
2374 | opoint = pos; |
2375 | opoint_byte = pos_byte; | |
2376 | ||
2377 | if (pos + 1 > beg) | |
2378 | DEC_BOTH (pos, pos_byte); | |
93da5fff | 2379 | } |
8489eb67 | 2380 | |
6a140a74 | 2381 | SET_PT_BOTH (opoint, opoint_byte); |
8489eb67 RS |
2382 | |
2383 | return Qnil; | |
2384 | } | |
2385 | \f | |
6a140a74 | 2386 | /* Parse forward from FROM / FROM_BYTE to END, |
e5d4f4dc RS |
2387 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
2388 | and return a description of the state of the parse at END. | |
c81a3712 | 2389 | If STOPBEFORE is nonzero, stop at the start of an atom. |
644ea4df RS |
2390 | If COMMENTSTOP is 1, stop at the start of a comment. |
2391 | If COMMENTSTOP is -1, stop at the start or end of a comment, | |
2392 | after the beginning of a string, or after the end of a string. */ | |
8489eb67 | 2393 | |
340f92b5 | 2394 | static void |
6a140a74 | 2395 | scan_sexps_forward (stateptr, from, from_byte, end, targetdepth, |
c81a3712 | 2396 | stopbefore, oldstate, commentstop) |
e5d4f4dc | 2397 | struct lisp_parse_state *stateptr; |
8489eb67 RS |
2398 | register int from; |
2399 | int end, targetdepth, stopbefore; | |
2400 | Lisp_Object oldstate; | |
c81a3712 | 2401 | int commentstop; |
8489eb67 RS |
2402 | { |
2403 | struct lisp_parse_state state; | |
2404 | ||
2405 | register enum syntaxcode code; | |
95ff8dfc RS |
2406 | int c1; |
2407 | int comnested; | |
8489eb67 RS |
2408 | struct level { int last, prev; }; |
2409 | struct level levelstart[100]; | |
2410 | register struct level *curlevel = levelstart; | |
2411 | struct level *endlevel = levelstart + 100; | |
8489eb67 RS |
2412 | register int depth; /* Paren depth of current scanning location. |
2413 | level - levelstart equals this except | |
2414 | when the depth becomes negative. */ | |
2415 | int mindepth; /* Lowest DEPTH value seen. */ | |
2416 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
2417 | Lisp_Object tem; | |
93da5fff | 2418 | int prev_from; /* Keep one character before FROM. */ |
6a140a74 | 2419 | int prev_from_byte; |
1fd3172d | 2420 | int prev_from_syntax; |
195d1361 RS |
2421 | int boundary_stop = commentstop == -1; |
2422 | int nofence; | |
95ff8dfc RS |
2423 | int found; |
2424 | int out_bytepos, out_charpos; | |
7c7ca3d2 | 2425 | int temp; |
93da5fff KH |
2426 | |
2427 | prev_from = from; | |
6a140a74 RS |
2428 | prev_from_byte = from_byte; |
2429 | if (from != BEGV) | |
2430 | DEC_BOTH (prev_from, prev_from_byte); | |
93da5fff KH |
2431 | |
2432 | /* Use this macro instead of `from++'. */ | |
6a140a74 RS |
2433 | #define INC_FROM \ |
2434 | do { prev_from = from; \ | |
2435 | prev_from_byte = from_byte; \ | |
1fd3172d RS |
2436 | prev_from_syntax \ |
2437 | = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); \ | |
ef316cf0 | 2438 | INC_BOTH (from, from_byte); \ |
1fd3172d | 2439 | UPDATE_SYNTAX_TABLE_FORWARD (from); \ |
6a140a74 | 2440 | } while (0) |
8489eb67 RS |
2441 | |
2442 | immediate_quit = 1; | |
2443 | QUIT; | |
2444 | ||
265a9e55 | 2445 | if (NILP (oldstate)) |
8489eb67 RS |
2446 | { |
2447 | depth = 0; | |
2448 | state.instring = -1; | |
2449 | state.incomment = 0; | |
195d1361 RS |
2450 | state.comstyle = 0; /* comment style a by default. */ |
2451 | state.comstr_start = -1; /* no comment/string seen. */ | |
8489eb67 RS |
2452 | } |
2453 | else | |
2454 | { | |
2455 | tem = Fcar (oldstate); | |
265a9e55 | 2456 | if (!NILP (tem)) |
8489eb67 RS |
2457 | depth = XINT (tem); |
2458 | else | |
2459 | depth = 0; | |
2460 | ||
2461 | oldstate = Fcdr (oldstate); | |
2462 | oldstate = Fcdr (oldstate); | |
2463 | oldstate = Fcdr (oldstate); | |
2464 | tem = Fcar (oldstate); | |
195d1361 RS |
2465 | /* Check whether we are inside string_fence-style string: */ |
2466 | state.instring = ( !NILP (tem) | |
2467 | ? ( INTEGERP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
2468 | : -1); | |
8489eb67 RS |
2469 | |
2470 | oldstate = Fcdr (oldstate); | |
2471 | tem = Fcar (oldstate); | |
95ff8dfc RS |
2472 | state.incomment = ( !NILP (tem) |
2473 | ? ( INTEGERP (tem) ? XINT (tem) : -1) | |
2474 | : 0); | |
8489eb67 RS |
2475 | |
2476 | oldstate = Fcdr (oldstate); | |
2477 | tem = Fcar (oldstate); | |
265a9e55 | 2478 | start_quoted = !NILP (tem); |
e5d4f4dc | 2479 | |
95ff8dfc | 2480 | /* if the eighth element of the list is nil, we are in comment |
195d1361 RS |
2481 | style a. If it is non-nil, we are in comment style b */ |
2482 | oldstate = Fcdr (oldstate); | |
e5d4f4dc | 2483 | oldstate = Fcdr (oldstate); |
195d1361 RS |
2484 | tem = Fcar (oldstate); |
2485 | state.comstyle = NILP (tem) ? 0 : ( EQ (tem, Qsyntax_table) | |
2486 | ? ST_COMMENT_STYLE : 1 ); | |
2487 | ||
e5d4f4dc | 2488 | oldstate = Fcdr (oldstate); |
e5d4f4dc | 2489 | tem = Fcar (oldstate); |
195d1361 | 2490 | state.comstr_start = NILP (tem) ? -1 : XINT (tem) ; |
1a102a58 RS |
2491 | oldstate = Fcdr (oldstate); |
2492 | tem = Fcar (oldstate); | |
2493 | while (!NILP (tem)) /* >= second enclosing sexps. */ | |
2494 | { | |
2495 | /* curlevel++->last ran into compiler bug on Apollo */ | |
2496 | curlevel->last = XINT (Fcar (tem)); | |
2497 | if (++curlevel == endlevel) | |
2498 | error ("Nesting too deep for parser"); | |
2499 | curlevel->prev = -1; | |
2500 | curlevel->last = -1; | |
2501 | tem = Fcdr (tem); | |
2502 | } | |
8489eb67 RS |
2503 | } |
2504 | state.quoted = 0; | |
2505 | mindepth = depth; | |
2506 | ||
2507 | curlevel->prev = -1; | |
2508 | curlevel->last = -1; | |
2509 | ||
326b283b RS |
2510 | SETUP_SYNTAX_TABLE (prev_from, 1); |
2511 | prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); | |
2512 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2513 | ||
195d1361 | 2514 | /* Enter the loop at a place appropriate for initial state. */ |
8489eb67 | 2515 | |
326b283b RS |
2516 | if (state.incomment) |
2517 | goto startincomment; | |
8489eb67 RS |
2518 | if (state.instring >= 0) |
2519 | { | |
195d1361 | 2520 | nofence = state.instring != ST_STRING_STYLE; |
326b283b RS |
2521 | if (start_quoted) |
2522 | goto startquotedinstring; | |
8489eb67 RS |
2523 | goto startinstring; |
2524 | } | |
326b283b RS |
2525 | else if (start_quoted) |
2526 | goto startquoted; | |
1fd3172d | 2527 | |
ccf89641 | 2528 | #if 0 /* This seems to be redundant with the identical code above. */ |
1fd3172d RS |
2529 | SETUP_SYNTAX_TABLE (prev_from, 1); |
2530 | prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); | |
2531 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
ccf89641 | 2532 | #endif |
1fd3172d | 2533 | |
8489eb67 RS |
2534 | while (from < end) |
2535 | { | |
93da5fff | 2536 | INC_FROM; |
1fd3172d | 2537 | code = prev_from_syntax & 0xff; |
4c920633 | 2538 | |
8f9dc2ed | 2539 | if (code == Scomment) |
95ff8dfc RS |
2540 | { |
2541 | state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ? | |
2542 | 1 : -1); | |
2543 | state.comstr_start = prev_from; | |
2544 | } | |
4c920633 | 2545 | else if (code == Scomment_fence) |
e5d4f4dc RS |
2546 | { |
2547 | /* Record the comment style we have entered so that only | |
2548 | the comment-end sequence of the same style actually | |
2549 | terminates the comment section. */ | |
95ff8dfc RS |
2550 | state.comstyle = ST_COMMENT_STYLE; |
2551 | state.incomment = -1; | |
195d1361 | 2552 | state.comstr_start = prev_from; |
e5d4f4dc | 2553 | code = Scomment; |
e5d4f4dc | 2554 | } |
4c920633 | 2555 | else if (from < end) |
1fd3172d | 2556 | if (SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax)) |
95ff8dfc RS |
2557 | if (c1 = FETCH_CHAR (from_byte), |
2558 | SYNTAX_COMSTART_SECOND (c1)) | |
1fd3172d | 2559 | /* Duplicate code to avoid a complex if-expression |
4c920633 RS |
2560 | which causes trouble for the SGI compiler. */ |
2561 | { | |
2562 | /* Record the comment style we have entered so that only | |
2563 | the comment-end sequence of the same style actually | |
2564 | terminates the comment section. */ | |
95ff8dfc RS |
2565 | state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte)); |
2566 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax); | |
2567 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
2568 | state.incomment = comnested ? 1 : -1; | |
4c920633 | 2569 | state.comstr_start = prev_from; |
95ff8dfc | 2570 | INC_FROM; |
4c920633 RS |
2571 | code = Scomment; |
2572 | } | |
e5d4f4dc | 2573 | |
1fd3172d | 2574 | if (SYNTAX_FLAGS_PREFIX (prev_from_syntax)) |
8489eb67 | 2575 | continue; |
0220c518 | 2576 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2577 | { |
2578 | case Sescape: | |
2579 | case Scharquote: | |
2580 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2581 | curlevel->last = prev_from; |
8489eb67 RS |
2582 | startquoted: |
2583 | if (from == end) goto endquoted; | |
93da5fff | 2584 | INC_FROM; |
8489eb67 RS |
2585 | goto symstarted; |
2586 | /* treat following character as a word constituent */ | |
2587 | case Sword: | |
2588 | case Ssymbol: | |
2589 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2590 | curlevel->last = prev_from; |
8489eb67 RS |
2591 | symstarted: |
2592 | while (from < end) | |
2593 | { | |
7c7ca3d2 RS |
2594 | /* Some compilers can't handle this inside the switch. */ |
2595 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2596 | switch (temp) | |
8489eb67 RS |
2597 | { |
2598 | case Scharquote: | |
2599 | case Sescape: | |
93da5fff | 2600 | INC_FROM; |
8489eb67 RS |
2601 | if (from == end) goto endquoted; |
2602 | break; | |
2603 | case Sword: | |
2604 | case Ssymbol: | |
2605 | case Squote: | |
2606 | break; | |
2607 | default: | |
2608 | goto symdone; | |
2609 | } | |
93da5fff | 2610 | INC_FROM; |
8489eb67 RS |
2611 | } |
2612 | symdone: | |
2613 | curlevel->prev = curlevel->last; | |
2614 | break; | |
2615 | ||
5a28e48c | 2616 | startincomment: |
195d1361 | 2617 | if (commentstop == 1) |
5a28e48c | 2618 | goto done; |
195d1361 | 2619 | goto commentloop; |
5a28e48c | 2620 | |
8489eb67 | 2621 | case Scomment: |
95ff8dfc | 2622 | assert (state.incomment != 0); /* state.incomment = -1; */ |
195d1361 RS |
2623 | if (commentstop || boundary_stop) goto done; |
2624 | commentloop: | |
95ff8dfc RS |
2625 | /* The (from == BEGV) test is to enter the loop in the middle so |
2626 | that we find a 2-char comment ender even if we start in the | |
2627 | middle of it. */ | |
2628 | found = forw_comment (from, from_byte, end, | |
2629 | state.incomment, state.comstyle, | |
2630 | (from == BEGV) ? 0 : prev_from_syntax, | |
2631 | &out_charpos, &out_bytepos, &state.incomment); | |
2632 | from = out_charpos; from_byte = out_bytepos; | |
2633 | /* Beware! prev_from and friends are invalid now. | |
2634 | Luckily, the `done' doesn't use them and the INC_FROM | |
2635 | sets them to a sane value without looking at them. */ | |
2636 | if (!found) goto done; | |
195d1361 | 2637 | INC_FROM; |
8489eb67 | 2638 | state.incomment = 0; |
e5d4f4dc | 2639 | state.comstyle = 0; /* reset the comment style */ |
195d1361 | 2640 | if (boundary_stop) goto done; |
8489eb67 RS |
2641 | break; |
2642 | ||
2643 | case Sopen: | |
2644 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
2645 | depth++; | |
2646 | /* curlevel++->last ran into compiler bug on Apollo */ | |
93da5fff | 2647 | curlevel->last = prev_from; |
8489eb67 RS |
2648 | if (++curlevel == endlevel) |
2649 | error ("Nesting too deep for parser"); | |
2650 | curlevel->prev = -1; | |
2651 | curlevel->last = -1; | |
30844415 | 2652 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2653 | break; |
2654 | ||
2655 | case Sclose: | |
2656 | depth--; | |
2657 | if (depth < mindepth) | |
2658 | mindepth = depth; | |
2659 | if (curlevel != levelstart) | |
2660 | curlevel--; | |
2661 | curlevel->prev = curlevel->last; | |
30844415 | 2662 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2663 | break; |
2664 | ||
2665 | case Sstring: | |
195d1361 RS |
2666 | case Sstring_fence: |
2667 | state.comstr_start = from - 1; | |
8489eb67 | 2668 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
93da5fff | 2669 | curlevel->last = prev_from; |
195d1361 | 2670 | state.instring = (code == Sstring |
6a140a74 | 2671 | ? (FETCH_CHAR (prev_from_byte)) |
195d1361 RS |
2672 | : ST_STRING_STYLE); |
2673 | if (boundary_stop) goto done; | |
8489eb67 | 2674 | startinstring: |
195d1361 | 2675 | { |
644ea4df | 2676 | nofence = state.instring != ST_STRING_STYLE; |
195d1361 | 2677 | |
644ea4df RS |
2678 | while (1) |
2679 | { | |
2680 | int c; | |
195d1361 | 2681 | |
644ea4df | 2682 | if (from >= end) goto done; |
6a140a74 | 2683 | c = FETCH_CHAR (from_byte); |
7c7ca3d2 RS |
2684 | /* Some compilers can't handle this inside the switch. */ |
2685 | temp = SYNTAX (c); | |
ccf89641 KH |
2686 | |
2687 | /* Check TEMP here so that if the char has | |
2688 | a syntax-table property which says it is NOT | |
2689 | a string character, it does not end the string. */ | |
2690 | if (nofence && c == state.instring && temp == Sstring) | |
2691 | break; | |
2692 | ||
7c7ca3d2 | 2693 | switch (temp) |
644ea4df RS |
2694 | { |
2695 | case Sstring_fence: | |
2696 | if (!nofence) goto string_end; | |
2697 | break; | |
2698 | case Scharquote: | |
2699 | case Sescape: | |
2700 | INC_FROM; | |
2701 | startquotedinstring: | |
2702 | if (from >= end) goto endquoted; | |
195d1361 | 2703 | } |
644ea4df RS |
2704 | INC_FROM; |
2705 | } | |
195d1361 RS |
2706 | } |
2707 | string_end: | |
8489eb67 RS |
2708 | state.instring = -1; |
2709 | curlevel->prev = curlevel->last; | |
93da5fff | 2710 | INC_FROM; |
195d1361 | 2711 | if (boundary_stop) goto done; |
8489eb67 RS |
2712 | break; |
2713 | ||
2714 | case Smath: | |
2715 | break; | |
2716 | } | |
2717 | } | |
2718 | goto done; | |
2719 | ||
2720 | stop: /* Here if stopping before start of sexp. */ | |
93da5fff | 2721 | from = prev_from; /* We have just fetched the char that starts it; */ |
8489eb67 RS |
2722 | goto done; /* but return the position before it. */ |
2723 | ||
2724 | endquoted: | |
2725 | state.quoted = 1; | |
2726 | done: | |
2727 | state.depth = depth; | |
2728 | state.mindepth = mindepth; | |
2729 | state.thislevelstart = curlevel->prev; | |
2730 | state.prevlevelstart | |
2731 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
2732 | state.location = from; | |
1a102a58 RS |
2733 | state.levelstarts = Qnil; |
2734 | while (--curlevel >= levelstart) | |
2735 | state.levelstarts = Fcons (make_number (curlevel->last), | |
2736 | state.levelstarts); | |
8489eb67 RS |
2737 | immediate_quit = 0; |
2738 | ||
e5d4f4dc | 2739 | *stateptr = state; |
8489eb67 RS |
2740 | } |
2741 | ||
2742 | /* This comment supplies the doc string for parse-partial-sexp, | |
2743 | for make-docfile to see. We cannot put this in the real DEFUN | |
2744 | due to limits in the Unix cpp. | |
2745 | ||
c81a3712 | 2746 | DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0, |
8489eb67 RS |
2747 | "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\ |
2748 | Parsing stops at TO or when certain criteria are met;\n\ | |
2749 | point is set to where parsing stops.\n\ | |
2750 | If fifth arg STATE is omitted or nil,\n\ | |
2751 | parsing assumes that FROM is the beginning of a function.\n\ | |
1a102a58 | 2752 | Value is a list of ten elements describing final state of parsing:\n\ |
af50f9e5 RS |
2753 | 0. depth in parens.\n\ |
2754 | 1. character address of start of innermost containing list; nil if none.\n\ | |
2755 | 2. character address of start of last complete sexp terminated.\n\ | |
2756 | 3. non-nil if inside a string.\n\ | |
195d1361 | 2757 | (it is the character that will terminate the string,\n\ |
bff37d2a | 2758 | or t if the string should be terminated by a generic string delimiter.)\n\ |
95ff8dfc RS |
2759 | 4. nil if outside a comment, t if inside a non-nestable comment, \n\ |
2760 | else an integer (the current comment nesting).\n\ | |
af50f9e5 RS |
2761 | 5. t if following a quote character.\n\ |
2762 | 6. the minimum paren-depth encountered during this scan.\n\ | |
bff37d2a RS |
2763 | 7. t if in a comment of style b; `syntax-table' if the comment\n\ |
2764 | should be terminated by a generic comment delimiter.\n\ | |
2765 | 8. character address of start of comment or string; nil if not in one.\n\ | |
1a102a58 | 2766 | 9. Intermediate data for continuation of parsing (subject to change).\n\ |
8489eb67 RS |
2767 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\ |
2768 | in parentheses becomes equal to TARGETDEPTH.\n\ | |
2769 | Fourth arg STOPBEFORE non-nil means stop when come to\n\ | |
2770 | any character that starts a sexp.\n\ | |
bff37d2a RS |
2771 | Fifth arg STATE is a nine-element list like what this function returns.\n\ |
2772 | It is used to initialize the state of the parse. Elements number 1, 2, 6\n\ | |
2773 | and 8 are ignored; you can leave off element 8 (the last) entirely.\n\ | |
2774 | Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.\n\ | |
2775 | If it is `syntax-table', stop after the start of a comment or a string,\n\ | |
2776 | or after end of a comment or a string.") | |
c81a3712 | 2777 | (from, to, targetdepth, stopbefore, state, commentstop) |
8489eb67 RS |
2778 | */ |
2779 | ||
c81a3712 | 2780 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
8489eb67 | 2781 | 0 /* See immediately above */) |
c81a3712 RS |
2782 | (from, to, targetdepth, stopbefore, oldstate, commentstop) |
2783 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; | |
8489eb67 RS |
2784 | { |
2785 | struct lisp_parse_state state; | |
2786 | int target; | |
2787 | ||
265a9e55 | 2788 | if (!NILP (targetdepth)) |
8489eb67 RS |
2789 | { |
2790 | CHECK_NUMBER (targetdepth, 3); | |
2791 | target = XINT (targetdepth); | |
2792 | } | |
2793 | else | |
2794 | target = -100000; /* We won't reach this depth */ | |
2795 | ||
2796 | validate_region (&from, &to); | |
6a140a74 RS |
2797 | scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)), |
2798 | XINT (to), | |
c81a3712 | 2799 | target, !NILP (stopbefore), oldstate, |
195d1361 RS |
2800 | (NILP (commentstop) |
2801 | ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); | |
8489eb67 RS |
2802 | |
2803 | SET_PT (state.location); | |
2804 | ||
2805 | return Fcons (make_number (state.depth), | |
2806 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
2807 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
195d1361 RS |
2808 | Fcons (state.instring >= 0 |
2809 | ? (state.instring == ST_STRING_STYLE | |
2810 | ? Qt : make_number (state.instring)) : Qnil, | |
95ff8dfc RS |
2811 | Fcons (state.incomment < 0 ? Qt : |
2812 | (state.incomment == 0 ? Qnil : | |
2813 | make_number (state.incomment)), | |
8489eb67 | 2814 | Fcons (state.quoted ? Qt : Qnil, |
bff37d2a RS |
2815 | Fcons (make_number (state.mindepth), |
2816 | Fcons ((state.comstyle | |
2817 | ? (state.comstyle == ST_COMMENT_STYLE | |
2818 | ? Qsyntax_table : Qt) : | |
2819 | Qnil), | |
0beaf54f DL |
2820 | Fcons (((state.incomment |
2821 | || (state.instring >= 0)) | |
bff37d2a RS |
2822 | ? make_number (state.comstr_start) |
2823 | : Qnil), | |
1a102a58 | 2824 | Fcons (state.levelstarts, Qnil)))))))))); |
8489eb67 RS |
2825 | } |
2826 | \f | |
dfcf069d | 2827 | void |
8489eb67 RS |
2828 | init_syntax_once () |
2829 | { | |
78f9a1f7 | 2830 | register int i, c; |
8ea151b2 | 2831 | Lisp_Object temp; |
8489eb67 | 2832 | |
5ebaddf5 RS |
2833 | /* This has to be done here, before we call Fmake_char_table. */ |
2834 | Qsyntax_table = intern ("syntax-table"); | |
2835 | staticpro (&Qsyntax_table); | |
2836 | ||
2837 | /* Intern this now in case it isn't already done. | |
2838 | Setting this variable twice is harmless. | |
2839 | But don't staticpro it here--that is done in alloc.c. */ | |
2840 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
2841 | ||
93da5fff | 2842 | /* Create objects which can be shared among syntax tables. */ |
44d8a793 | 2843 | Vsyntax_code_object = Fmake_vector (make_number (13), Qnil); |
93da5fff KH |
2844 | for (i = 0; i < XVECTOR (Vsyntax_code_object)->size; i++) |
2845 | XVECTOR (Vsyntax_code_object)->contents[i] | |
2846 | = Fcons (make_number (i), Qnil); | |
2847 | ||
5ebaddf5 RS |
2848 | /* Now we are ready to set up this property, so we can |
2849 | create syntax tables. */ | |
2850 | Fput (Qsyntax_table, Qchar_table_extra_slots, make_number (0)); | |
2851 | ||
93da5fff | 2852 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; |
8489eb67 | 2853 | |
5ebaddf5 | 2854 | Vstandard_syntax_table = Fmake_char_table (Qsyntax_table, temp); |
8489eb67 | 2855 | |
93da5fff | 2856 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; |
8489eb67 | 2857 | for (i = 'a'; i <= 'z'; i++) |
8ea151b2 | 2858 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 2859 | for (i = 'A'; i <= 'Z'; i++) |
8ea151b2 | 2860 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 2861 | for (i = '0'; i <= '9'; i++) |
8ea151b2 RS |
2862 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
2863 | ||
2864 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '$', temp); | |
2865 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '%', temp); | |
2866 | ||
2867 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '(', | |
2868 | Fcons (make_number (Sopen), make_number (')'))); | |
2869 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ')', | |
2870 | Fcons (make_number (Sclose), make_number ('('))); | |
2871 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '[', | |
2872 | Fcons (make_number (Sopen), make_number (']'))); | |
2873 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ']', | |
2874 | Fcons (make_number (Sclose), make_number ('['))); | |
2875 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '{', | |
2876 | Fcons (make_number (Sopen), make_number ('}'))); | |
2877 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '}', | |
2878 | Fcons (make_number (Sclose), make_number ('{'))); | |
2879 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '"', | |
2880 | Fcons (make_number ((int) Sstring), Qnil)); | |
2881 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\\', | |
2882 | Fcons (make_number ((int) Sescape), Qnil)); | |
2883 | ||
93da5fff | 2884 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Ssymbol]; |
8489eb67 | 2885 | for (i = 0; i < 10; i++) |
78f9a1f7 KH |
2886 | { |
2887 | c = "_-+*/&|<>="[i]; | |
2888 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
2889 | } | |
8489eb67 | 2890 | |
93da5fff | 2891 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; |
8489eb67 | 2892 | for (i = 0; i < 12; i++) |
78f9a1f7 KH |
2893 | { |
2894 | c = ".,;:?!#@~^'`"[i]; | |
2895 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
2896 | } | |
8489eb67 RS |
2897 | } |
2898 | ||
dfcf069d | 2899 | void |
8489eb67 RS |
2900 | syms_of_syntax () |
2901 | { | |
2902 | Qsyntax_table_p = intern ("syntax-table-p"); | |
2903 | staticpro (&Qsyntax_table_p); | |
2904 | ||
93da5fff KH |
2905 | staticpro (&Vsyntax_code_object); |
2906 | ||
7bf5e9e4 RS |
2907 | Qscan_error = intern ("scan-error"); |
2908 | staticpro (&Qscan_error); | |
2909 | Fput (Qscan_error, Qerror_conditions, | |
f3be100f | 2910 | Fcons (Qscan_error, Fcons (Qerror, Qnil))); |
7bf5e9e4 RS |
2911 | Fput (Qscan_error, Qerror_message, |
2912 | build_string ("Scan error")); | |
2913 | ||
8489eb67 RS |
2914 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, |
2915 | "Non-nil means `forward-sexp', etc., should treat comments as whitespace."); | |
2916 | ||
195d1361 RS |
2917 | DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties, |
2918 | "Non-nil means `forward-sexp', etc., grant `syntax-table' property.\n\ | |
2919 | The value of this property should be either a syntax table, or a cons\n\ | |
2920 | of the form (SYNTAXCODE . MATCHCHAR), SYNTAXCODE being the numeric\n\ | |
2921 | syntax code, MATCHCHAR being nil or the character to match (which is\n\ | |
2922 | relevant only for open/close type."); | |
2923 | ||
8489eb67 RS |
2924 | words_include_escapes = 0; |
2925 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
2926 | "Non-nil means `forward-word', etc., should treat escape chars part of words."); | |
2927 | ||
2928 | defsubr (&Ssyntax_table_p); | |
2929 | defsubr (&Ssyntax_table); | |
2930 | defsubr (&Sstandard_syntax_table); | |
2931 | defsubr (&Scopy_syntax_table); | |
2932 | defsubr (&Sset_syntax_table); | |
2933 | defsubr (&Schar_syntax); | |
beefa22e | 2934 | defsubr (&Smatching_paren); |
8489eb67 RS |
2935 | defsubr (&Smodify_syntax_entry); |
2936 | defsubr (&Sdescribe_syntax); | |
2937 | ||
2938 | defsubr (&Sforward_word); | |
2939 | ||
195d1361 RS |
2940 | defsubr (&Sskip_chars_forward); |
2941 | defsubr (&Sskip_chars_backward); | |
2942 | defsubr (&Sskip_syntax_forward); | |
2943 | defsubr (&Sskip_syntax_backward); | |
2944 | ||
b3cfe0c8 | 2945 | defsubr (&Sforward_comment); |
8489eb67 RS |
2946 | defsubr (&Sscan_lists); |
2947 | defsubr (&Sscan_sexps); | |
2948 | defsubr (&Sbackward_prefix_chars); | |
2949 | defsubr (&Sparse_partial_sexp); | |
2950 | } |