Commit | Line | Data |
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edfda783 | 1 | #include <stdio.h> |
8489eb67 | 2 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
429ab54e | 3 | Copyright (C) 1985, 1987, 1993, 1994, 1995, 1997, 1998, 1999, 2001, |
8cabe764 | 4 | 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
429ab54e | 5 | Free Software Foundation, Inc. |
8489eb67 RS |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
9ec0b715 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
8489eb67 | 10 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
8489eb67 RS |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
8489eb67 RS |
21 | |
22 | ||
18160b98 | 23 | #include <config.h> |
8489eb67 RS |
24 | #include <ctype.h> |
25 | #include "lisp.h" | |
26 | #include "commands.h" | |
27 | #include "buffer.h" | |
5c7b02ab | 28 | #include "character.h" |
e35f6ff7 | 29 | #include "keymap.h" |
a1bc88d4 | 30 | #include "regex.h" |
195d1361 RS |
31 | |
32 | /* Make syntax table lookup grant data in gl_state. */ | |
33 | #define SYNTAX_ENTRY_VIA_PROPERTY | |
34 | ||
8489eb67 | 35 | #include "syntax.h" |
195d1361 RS |
36 | #include "intervals.h" |
37 | ||
38 | /* We use these constants in place for comment-style and | |
39 | string-ender-char to distinguish comments/strings started by | |
40 | comment_fence and string_fence codes. */ | |
41 | ||
42 | #define ST_COMMENT_STYLE (256 + 1) | |
43 | #define ST_STRING_STYLE (256 + 2) | |
93da5fff | 44 | #include "category.h" |
8489eb67 | 45 | |
7bf5e9e4 | 46 | Lisp_Object Qsyntax_table_p, Qsyntax_table, Qscan_error; |
8489eb67 RS |
47 | |
48 | int words_include_escapes; | |
195d1361 | 49 | int parse_sexp_lookup_properties; |
8489eb67 | 50 | |
bd25db08 KH |
51 | /* Nonzero means `scan-sexps' treat all multibyte characters as symbol. */ |
52 | int multibyte_syntax_as_symbol; | |
53 | ||
8ea151b2 RS |
54 | /* Used as a temporary in SYNTAX_ENTRY and other macros in syntax.h, |
55 | if not compiled with GCC. No need to mark it, since it is used | |
56 | only very temporarily. */ | |
57 | Lisp_Object syntax_temp; | |
58 | ||
f4ed767f GM |
59 | /* Non-zero means an open parenthesis in column 0 is always considered |
60 | to be the start of a defun. Zero means an open parenthesis in | |
61 | column 0 has no special meaning. */ | |
62 | ||
63 | int open_paren_in_column_0_is_defun_start; | |
64 | ||
e5d4f4dc RS |
65 | /* This is the internal form of the parse state used in parse-partial-sexp. */ |
66 | ||
67 | struct lisp_parse_state | |
68 | { | |
195d1361 RS |
69 | int depth; /* Depth at end of parsing. */ |
70 | int instring; /* -1 if not within string, else desired terminator. */ | |
95ff8dfc | 71 | int incomment; /* -1 if in unnestable comment else comment nesting */ |
195d1361 | 72 | int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */ |
e5d4f4dc RS |
73 | int quoted; /* Nonzero if just after an escape char at end of parsing */ |
74 | int thislevelstart; /* Char number of most recent start-of-expression at current level */ | |
75 | int prevlevelstart; /* Char number of start of containing expression */ | |
195d1361 | 76 | int location; /* Char number at which parsing stopped. */ |
e5d4f4dc | 77 | int mindepth; /* Minimum depth seen while scanning. */ |
195d1361 | 78 | int comstr_start; /* Position just after last comment/string starter. */ |
1a102a58 RS |
79 | Lisp_Object levelstarts; /* Char numbers of starts-of-expression |
80 | of levels (starting from outermost). */ | |
e5d4f4dc RS |
81 | }; |
82 | \f | |
37bef230 RS |
83 | /* These variables are a cache for finding the start of a defun. |
84 | find_start_pos is the place for which the defun start was found. | |
85 | find_start_value is the defun start position found for it. | |
6a140a74 | 86 | find_start_value_byte is the corresponding byte position. |
37bef230 RS |
87 | find_start_buffer is the buffer it was found in. |
88 | find_start_begv is the BEGV value when it was found. | |
89 | find_start_modiff is the value of MODIFF when it was found. */ | |
90 | ||
91 | static int find_start_pos; | |
92 | static int find_start_value; | |
6a140a74 | 93 | static int find_start_value_byte; |
37bef230 RS |
94 | static struct buffer *find_start_buffer; |
95 | static int find_start_begv; | |
96 | static int find_start_modiff; | |
6a140a74 RS |
97 | |
98 | ||
99 | static int find_defun_start P_ ((int, int)); | |
932e6895 SM |
100 | static int back_comment P_ ((EMACS_INT, EMACS_INT, EMACS_INT, int, int, |
101 | EMACS_INT *, EMACS_INT *)); | |
6a140a74 | 102 | static int char_quoted P_ ((int, int)); |
327719ee | 103 | static Lisp_Object skip_chars P_ ((int, Lisp_Object, Lisp_Object, int)); |
b7dbcc19 | 104 | static Lisp_Object skip_syntaxes P_ ((int, Lisp_Object, Lisp_Object)); |
932e6895 | 105 | static Lisp_Object scan_lists P_ ((EMACS_INT, EMACS_INT, EMACS_INT, int)); |
6a140a74 RS |
106 | static void scan_sexps_forward P_ ((struct lisp_parse_state *, |
107 | int, int, int, int, | |
108 | int, Lisp_Object, int)); | |
a1bc88d4 | 109 | static int in_classes P_ ((int, Lisp_Object)); |
195d1361 RS |
110 | \f |
111 | ||
112 | struct gl_state_s gl_state; /* Global state of syntax parser. */ | |
113 | ||
114 | INTERVAL interval_of (); | |
115 | #define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals | |
116 | to scan to property-change. */ | |
117 | ||
6a140a74 RS |
118 | /* Update gl_state to an appropriate interval which contains CHARPOS. The |
119 | sign of COUNT give the relative position of CHARPOS wrt the previously | |
195d1361 | 120 | valid interval. If INIT, only [be]_property fields of gl_state are |
6a140a74 | 121 | valid at start, the rest is filled basing on OBJECT. |
195d1361 | 122 | |
6a140a74 | 123 | `gl_state.*_i' are the intervals, and CHARPOS is further in the search |
195d1361 RS |
124 | direction than the intervals - or in an interval. We update the |
125 | current syntax-table basing on the property of this interval, and | |
6a140a74 | 126 | update the interval to start further than CHARPOS - or be |
195d1361 | 127 | NULL_INTERVAL. We also update lim_property to be the next value of |
6a140a74 | 128 | charpos to call this subroutine again - or be before/after the |
195d1361 RS |
129 | start/end of OBJECT. */ |
130 | ||
131 | void | |
6a140a74 RS |
132 | update_syntax_table (charpos, count, init, object) |
133 | int charpos, count, init; | |
195d1361 RS |
134 | Lisp_Object object; |
135 | { | |
136 | Lisp_Object tmp_table; | |
4ffe723b | 137 | int cnt = 0, invalidate = 1; |
5a774522 | 138 | INTERVAL i; |
195d1361 RS |
139 | |
140 | if (init) | |
141 | { | |
bb0de084 | 142 | gl_state.old_prop = Qnil; |
195d1361 RS |
143 | gl_state.start = gl_state.b_property; |
144 | gl_state.stop = gl_state.e_property; | |
bb0de084 SM |
145 | i = interval_of (charpos, object); |
146 | gl_state.backward_i = gl_state.forward_i = i; | |
195d1361 RS |
147 | invalidate = 0; |
148 | if (NULL_INTERVAL_P (i)) | |
149 | return; | |
f902a008 | 150 | /* interval_of updates only ->position of the return value, so |
d80f4cc7 | 151 | update the parents manually to speed up update_interval. */ |
bb0de084 | 152 | while (!NULL_PARENT (i)) |
d80f4cc7 RS |
153 | { |
154 | if (AM_RIGHT_CHILD (i)) | |
439d5cb4 | 155 | INTERVAL_PARENT (i)->position = i->position |
d80f4cc7 | 156 | - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */ |
439d5cb4 KR |
157 | - TOTAL_LENGTH (INTERVAL_PARENT (i)) |
158 | + LEFT_TOTAL_LENGTH (INTERVAL_PARENT (i)); | |
d80f4cc7 | 159 | else |
439d5cb4 | 160 | INTERVAL_PARENT (i)->position = i->position - LEFT_TOTAL_LENGTH (i) |
d80f4cc7 | 161 | + TOTAL_LENGTH (i); |
439d5cb4 | 162 | i = INTERVAL_PARENT (i); |
d80f4cc7 RS |
163 | } |
164 | i = gl_state.forward_i; | |
bb0de084 | 165 | gl_state.b_property = i->position - gl_state.offset; |
ee0cdb48 | 166 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
167 | goto update; |
168 | } | |
5a774522 | 169 | i = count > 0 ? gl_state.forward_i : gl_state.backward_i; |
195d1361 | 170 | |
423e705d | 171 | /* We are guaranteed to be called with CHARPOS either in i, |
6a140a74 | 172 | or further off. */ |
195d1361 RS |
173 | if (NULL_INTERVAL_P (i)) |
174 | error ("Error in syntax_table logic for to-the-end intervals"); | |
6a140a74 | 175 | else if (charpos < i->position) /* Move left. */ |
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); |
bb0de084 | 181 | if (INTERVAL_LAST_POS (i) != gl_state.b_property) |
195d1361 RS |
182 | { |
183 | invalidate = 0; | |
195d1361 | 184 | gl_state.forward_i = i; |
ee0cdb48 | 185 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 | 186 | } |
423e705d | 187 | } |
6a140a74 | 188 | else if (charpos >= INTERVAL_LAST_POS (i)) /* Move right. */ |
195d1361 RS |
189 | { |
190 | if (count < 0) | |
f902a008 | 191 | error ("Error in syntax_table logic for intervals ->"); |
195d1361 | 192 | /* Update the interval. */ |
6a140a74 | 193 | i = update_interval (i, charpos); |
bb0de084 | 194 | if (i->position != gl_state.e_property) |
195d1361 RS |
195 | { |
196 | invalidate = 0; | |
195d1361 | 197 | gl_state.backward_i = i; |
bb0de084 | 198 | gl_state.b_property = i->position - gl_state.offset; |
195d1361 RS |
199 | } |
200 | } | |
195d1361 RS |
201 | |
202 | update: | |
203 | tmp_table = textget (i->plist, Qsyntax_table); | |
204 | ||
205 | if (invalidate) | |
206 | invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */ | |
7d0393cf | 207 | |
423e705d SM |
208 | if (invalidate) /* Did not get to adjacent interval. */ |
209 | { /* with the same table => */ | |
210 | /* invalidate the old range. */ | |
195d1361 RS |
211 | if (count > 0) |
212 | { | |
213 | gl_state.backward_i = i; | |
bb0de084 SM |
214 | gl_state.b_property = i->position - gl_state.offset; |
215 | } | |
216 | else | |
195d1361 | 217 | { |
bb0de084 | 218 | gl_state.forward_i = i; |
ee0cdb48 | 219 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
220 | } |
221 | } | |
37bef230 | 222 | |
bb0de084 | 223 | if (!EQ (tmp_table, gl_state.old_prop)) |
195d1361 | 224 | { |
bb0de084 SM |
225 | gl_state.current_syntax_table = tmp_table; |
226 | gl_state.old_prop = tmp_table; | |
227 | if (EQ (Fsyntax_table_p (tmp_table), Qt)) | |
228 | { | |
229 | gl_state.use_global = 0; | |
7d0393cf | 230 | } |
bb0de084 SM |
231 | else if (CONSP (tmp_table)) |
232 | { | |
233 | gl_state.use_global = 1; | |
234 | gl_state.global_code = tmp_table; | |
235 | } | |
7d0393cf | 236 | else |
bb0de084 SM |
237 | { |
238 | gl_state.use_global = 0; | |
239 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
240 | } | |
195d1361 RS |
241 | } |
242 | ||
243 | while (!NULL_INTERVAL_P (i)) | |
244 | { | |
245 | if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table))) | |
246 | { | |
247 | if (count > 0) | |
bb0de084 SM |
248 | { |
249 | gl_state.e_property = i->position - gl_state.offset; | |
250 | gl_state.forward_i = i; | |
251 | } | |
252 | else | |
253 | { | |
5a774522 SM |
254 | gl_state.b_property |
255 | = i->position + LENGTH (i) - gl_state.offset; | |
bb0de084 SM |
256 | gl_state.backward_i = i; |
257 | } | |
258 | return; | |
195d1361 | 259 | } |
7d0393cf | 260 | else if (cnt == INTERVALS_AT_ONCE) |
195d1361 RS |
261 | { |
262 | if (count > 0) | |
bb0de084 | 263 | { |
5a774522 SM |
264 | gl_state.e_property |
265 | = i->position + LENGTH (i) - gl_state.offset | |
266 | /* e_property at EOB is not set to ZV but to ZV+1, so that | |
267 | we can do INC(from);UPDATE_SYNTAX_TABLE_FORWARD without | |
268 | having to check eob between the two. */ | |
269 | + (NULL_INTERVAL_P (next_interval (i)) ? 1 : 0); | |
bb0de084 SM |
270 | gl_state.forward_i = i; |
271 | } | |
272 | else | |
273 | { | |
274 | gl_state.b_property = i->position - gl_state.offset; | |
275 | gl_state.backward_i = i; | |
276 | } | |
277 | return; | |
195d1361 RS |
278 | } |
279 | cnt++; | |
280 | i = count > 0 ? next_interval (i) : previous_interval (i); | |
281 | } | |
bb0de084 SM |
282 | eassert (NULL_INTERVAL_P (i)); /* This property goes to the end. */ |
283 | if (count > 0) | |
284 | gl_state.e_property = gl_state.stop; | |
285 | else | |
286 | gl_state.b_property = gl_state.start; | |
195d1361 RS |
287 | } |
288 | \f | |
6a140a74 RS |
289 | /* Returns TRUE if char at CHARPOS is quoted. |
290 | Global syntax-table data should be set up already to be good at CHARPOS | |
291 | or after. On return global syntax data is good for lookup at CHARPOS. */ | |
195d1361 RS |
292 | |
293 | static int | |
6a140a74 RS |
294 | char_quoted (charpos, bytepos) |
295 | register int charpos, bytepos; | |
195d1361 RS |
296 | { |
297 | register enum syntaxcode code; | |
298 | register int beg = BEGV; | |
299 | register int quoted = 0; | |
6a140a74 RS |
300 | int orig = charpos; |
301 | ||
edfda783 AR |
302 | #ifdef HAVE_NS |
303 | /* For some reason keeps getting called w/both 1, then segfaulting | |
304 | due to the definitions of DEC_BOTH and DEC_POS in character.h, | |
305 | which lead to decrementing below initial address and then examining | |
306 | character there. Need to investigate further.. */ | |
307 | if (charpos < 2 || bytepos < 2) | |
308 | { | |
309 | //fprintf(stderr,"Returning because charpos = %d, bytepos = %d\n",charpos, bytepos); | |
310 | return 0; | |
311 | } | |
312 | #endif | |
313 | ||
6a140a74 | 314 | DEC_BOTH (charpos, bytepos); |
195d1361 | 315 | |
709a47ce | 316 | while (charpos >= beg) |
195d1361 | 317 | { |
ab229fdd AS |
318 | int c; |
319 | ||
6a140a74 | 320 | UPDATE_SYNTAX_TABLE_BACKWARD (charpos); |
327719ee | 321 | c = FETCH_CHAR_AS_MULTIBYTE (bytepos); |
ab229fdd | 322 | code = SYNTAX (c); |
6a140a74 RS |
323 | if (! (code == Scharquote || code == Sescape)) |
324 | break; | |
325 | ||
326 | DEC_BOTH (charpos, bytepos); | |
327 | quoted = !quoted; | |
195d1361 | 328 | } |
6a140a74 RS |
329 | |
330 | UPDATE_SYNTAX_TABLE (orig); | |
195d1361 RS |
331 | return quoted; |
332 | } | |
6a140a74 RS |
333 | |
334 | /* Return the bytepos one character after BYTEPOS. | |
335 | We assume that BYTEPOS is not at the end of the buffer. */ | |
336 | ||
337 | INLINE int | |
338 | inc_bytepos (bytepos) | |
339 | int bytepos; | |
340 | { | |
ef316cf0 RS |
341 | if (NILP (current_buffer->enable_multibyte_characters)) |
342 | return bytepos + 1; | |
343 | ||
6a140a74 RS |
344 | INC_POS (bytepos); |
345 | return bytepos; | |
346 | } | |
347 | ||
348 | /* Return the bytepos one character before BYTEPOS. | |
349 | We assume that BYTEPOS is not at the start of the buffer. */ | |
350 | ||
351 | INLINE int | |
352 | dec_bytepos (bytepos) | |
353 | int bytepos; | |
354 | { | |
ef316cf0 RS |
355 | if (NILP (current_buffer->enable_multibyte_characters)) |
356 | return bytepos - 1; | |
357 | ||
6a140a74 RS |
358 | DEC_POS (bytepos); |
359 | return bytepos; | |
360 | } | |
195d1361 | 361 | \f |
7cc80f0a RS |
362 | /* Return a defun-start position before before POS and not too far before. |
363 | It should be the last one before POS, or nearly the last. | |
364 | ||
365 | When open_paren_in_column_0_is_defun_start is nonzero, | |
1fd1cc2f | 366 | only the beginning of the buffer is treated as a defun-start. |
7cc80f0a RS |
367 | |
368 | We record the information about where the scan started | |
369 | and what its result was, so that another call in the same area | |
370 | can return the same value very quickly. | |
195d1361 RS |
371 | |
372 | There is no promise at which position the global syntax data is | |
373 | valid on return from the subroutine, so the caller should explicitly | |
374 | update the global data. */ | |
37bef230 RS |
375 | |
376 | static int | |
6a140a74 RS |
377 | find_defun_start (pos, pos_byte) |
378 | int pos, pos_byte; | |
37bef230 | 379 | { |
6a140a74 | 380 | int opoint = PT, opoint_byte = PT_BYTE; |
37bef230 | 381 | |
1fd1cc2f RS |
382 | if (!open_paren_in_column_0_is_defun_start) |
383 | { | |
384 | find_start_value_byte = BEGV_BYTE; | |
385 | return BEGV; | |
386 | } | |
387 | ||
37bef230 RS |
388 | /* Use previous finding, if it's valid and applies to this inquiry. */ |
389 | if (current_buffer == find_start_buffer | |
390 | /* Reuse the defun-start even if POS is a little farther on. | |
391 | POS might be in the next defun, but that's ok. | |
392 | Our value may not be the best possible, but will still be usable. */ | |
393 | && pos <= find_start_pos + 1000 | |
394 | && pos >= find_start_value | |
395 | && BEGV == find_start_begv | |
396 | && MODIFF == find_start_modiff) | |
397 | return find_start_value; | |
398 | ||
399 | /* Back up to start of line. */ | |
6a140a74 | 400 | scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1); |
37bef230 | 401 | |
195d1361 RS |
402 | /* We optimize syntax-table lookup for rare updates. Thus we accept |
403 | only those `^\s(' which are good in global _and_ text-property | |
404 | syntax-tables. */ | |
405 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
406 | gl_state.use_global = 0; | |
1fd1cc2f | 407 | while (PT > BEGV) |
37bef230 | 408 | { |
ab229fdd AS |
409 | int c; |
410 | ||
1fd1cc2f RS |
411 | /* Open-paren at start of line means we may have found our |
412 | defun-start. */ | |
327719ee | 413 | c = FETCH_CHAR_AS_MULTIBYTE (PT_BYTE); |
ab229fdd | 414 | if (SYNTAX (c) == Sopen) |
195d1361 | 415 | { |
1fd1cc2f | 416 | SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */ |
327719ee | 417 | c = FETCH_CHAR_AS_MULTIBYTE (PT_BYTE); |
ab229fdd | 418 | if (SYNTAX (c) == Sopen) |
1fd1cc2f RS |
419 | break; |
420 | /* Now fallback to the default value. */ | |
421 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
422 | gl_state.use_global = 0; | |
195d1361 | 423 | } |
1fd1cc2f RS |
424 | /* Move to beg of previous line. */ |
425 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1); | |
37bef230 RS |
426 | } |
427 | ||
428 | /* Record what we found, for the next try. */ | |
6a140a74 RS |
429 | find_start_value = PT; |
430 | find_start_value_byte = PT_BYTE; | |
37bef230 RS |
431 | find_start_buffer = current_buffer; |
432 | find_start_modiff = MODIFF; | |
433 | find_start_begv = BEGV; | |
434 | find_start_pos = pos; | |
435 | ||
6a140a74 RS |
436 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
437 | ||
37bef230 RS |
438 | return find_start_value; |
439 | } | |
440 | \f | |
f902a008 RS |
441 | /* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */ |
442 | ||
443 | static int | |
444 | prev_char_comend_first (pos, pos_byte) | |
445 | int pos, pos_byte; | |
446 | { | |
447 | int c, val; | |
448 | ||
449 | DEC_BOTH (pos, pos_byte); | |
450 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
451 | c = FETCH_CHAR (pos_byte); | |
452 | val = SYNTAX_COMEND_FIRST (c); | |
453 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
454 | return val; | |
455 | } | |
456 | ||
457 | /* Return the SYNTAX_COMSTART_FIRST of the character before POS, POS_BYTE. */ | |
458 | ||
3f679f55 SM |
459 | /* static int |
460 | * prev_char_comstart_first (pos, pos_byte) | |
461 | * int pos, pos_byte; | |
462 | * { | |
463 | * int c, val; | |
7d0393cf | 464 | * |
3f679f55 SM |
465 | * DEC_BOTH (pos, pos_byte); |
466 | * UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
467 | * c = FETCH_CHAR (pos_byte); | |
468 | * val = SYNTAX_COMSTART_FIRST (c); | |
469 | * UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
470 | * return val; | |
471 | * } */ | |
f902a008 | 472 | |
6a140a74 RS |
473 | /* Checks whether charpos FROM is at the end of a comment. |
474 | FROM_BYTE is the bytepos corresponding to FROM. | |
475 | Do not move back before STOP. | |
476 | ||
477 | Return a positive value if we find a comment ending at FROM/FROM_BYTE; | |
478 | return -1 otherwise. | |
479 | ||
480 | If successful, store the charpos of the comment's beginning | |
481 | into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR. | |
527a32d9 KH |
482 | |
483 | Global syntax data remains valid for backward search starting at | |
484 | the returned value (or at FROM, if the search was not successful). */ | |
195d1361 RS |
485 | |
486 | static int | |
95ff8dfc | 487 | back_comment (from, from_byte, stop, comnested, comstyle, charpos_ptr, bytepos_ptr) |
932e6895 | 488 | EMACS_INT from, from_byte, stop; |
95ff8dfc | 489 | int comnested, comstyle; |
932e6895 | 490 | EMACS_INT *charpos_ptr, *bytepos_ptr; |
195d1361 RS |
491 | { |
492 | /* Look back, counting the parity of string-quotes, | |
493 | and recording the comment-starters seen. | |
494 | When we reach a safe place, assume that's not in a string; | |
495 | then step the main scan to the earliest comment-starter seen | |
496 | an even number of string quotes away from the safe place. | |
497 | ||
498 | OFROM[I] is position of the earliest comment-starter seen | |
499 | which is I+2X quotes from the comment-end. | |
500 | PARITY is current parity of quotes from the comment end. */ | |
3ee5041c | 501 | int string_style = -1; /* Presumed outside of any string. */ |
195d1361 | 502 | int string_lossage = 0; |
f7c436c1 | 503 | /* Not a real lossage: indicates that we have passed a matching comment |
7d0393cf | 504 | starter plus a non-matching comment-ender, meaning that any matching |
f7c436c1 SM |
505 | comment-starter we might see later could be a false positive (hidden |
506 | inside another comment). | |
507 | Test case: { a (* b } c (* d *) */ | |
508 | int comment_lossage = 0; | |
195d1361 | 509 | int comment_end = from; |
6a140a74 | 510 | int comment_end_byte = from_byte; |
195d1361 | 511 | int comstart_pos = 0; |
6a140a74 | 512 | int comstart_byte; |
eb35b628 RS |
513 | /* Place where the containing defun starts, |
514 | or 0 if we didn't come across it yet. */ | |
515 | int defun_start = 0; | |
516 | int defun_start_byte = 0; | |
195d1361 | 517 | register enum syntaxcode code; |
95ff8dfc | 518 | int nesting = 1; /* current comment nesting */ |
ea315ed6 | 519 | int c; |
3f679f55 SM |
520 | int syntax = 0; |
521 | ||
522 | /* FIXME: A }} comment-ender style leads to incorrect behavior | |
523 | in the case of {{ c }}} because we ignore the last two chars which are | |
524 | assumed to be comment-enders although they aren't. */ | |
195d1361 RS |
525 | |
526 | /* At beginning of range to scan, we're outside of strings; | |
527 | that determines quote parity to the comment-end. */ | |
528 | while (from != stop) | |
529 | { | |
3f679f55 SM |
530 | int temp_byte, prev_syntax; |
531 | int com2start, com2end; | |
6a140a74 | 532 | |
195d1361 | 533 | /* Move back and examine a character. */ |
6a140a74 | 534 | DEC_BOTH (from, from_byte); |
195d1361 RS |
535 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
536 | ||
3f679f55 | 537 | prev_syntax = syntax; |
b7dbcc19 | 538 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
3f679f55 | 539 | syntax = SYNTAX_WITH_FLAGS (c); |
195d1361 RS |
540 | code = SYNTAX (c); |
541 | ||
3f679f55 SM |
542 | /* Check for 2-char comment markers. */ |
543 | com2start = (SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
544 | && SYNTAX_FLAGS_COMSTART_SECOND (prev_syntax) | |
545 | && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (prev_syntax) | |
546 | && (SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax) | |
547 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested); | |
548 | com2end = (SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
549 | && SYNTAX_FLAGS_COMEND_SECOND (prev_syntax)); | |
550 | ||
551 | /* Nasty cases with overlapping 2-char comment markers: | |
552 | - snmp-mode: -- c -- foo -- c -- | |
553 | --- c -- | |
554 | ------ c -- | |
555 | - c-mode: *||* | |
556 | |* *|* *| | |
557 | |*| |* |*| | |
558 | /// */ | |
559 | ||
560 | /* If a 2-char comment sequence partly overlaps with another, | |
561 | we don't try to be clever. */ | |
562 | if (from > stop && (com2end || com2start)) | |
195d1361 | 563 | { |
3f679f55 SM |
564 | int next = from, next_byte = from_byte, next_c, next_syntax; |
565 | DEC_BOTH (next, next_byte); | |
566 | UPDATE_SYNTAX_TABLE_BACKWARD (next); | |
b7dbcc19 | 567 | next_c = FETCH_CHAR_AS_MULTIBYTE (next_byte); |
3f679f55 SM |
568 | next_syntax = SYNTAX_WITH_FLAGS (next_c); |
569 | if (((com2start || comnested) | |
570 | && SYNTAX_FLAGS_COMEND_SECOND (syntax) | |
571 | && SYNTAX_FLAGS_COMEND_FIRST (next_syntax)) | |
572 | || ((com2end || comnested) | |
573 | && SYNTAX_FLAGS_COMSTART_SECOND (syntax) | |
574 | && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (syntax) | |
575 | && SYNTAX_FLAGS_COMSTART_FIRST (next_syntax))) | |
576 | goto lossage; | |
577 | /* UPDATE_SYNTAX_TABLE_FORWARD (next + 1); */ | |
f902a008 | 578 | } |
3f679f55 SM |
579 | |
580 | if (com2start && comstart_pos == 0) | |
581 | /* We're looking at a comment starter. But it might be a comment | |
582 | ender as well (see snmp-mode). The first time we see one, we | |
583 | need to consider it as a comment starter, | |
584 | and the subsequent times as a comment ender. */ | |
585 | com2end = 0; | |
586 | ||
587 | /* Turn a 2-char comment sequences into the appropriate syntax. */ | |
588 | if (com2end) | |
589 | code = Sendcomment; | |
590 | else if (com2start) | |
591 | code = Scomment; | |
592 | /* Ignore comment starters of a different style. */ | |
593 | else if (code == Scomment | |
594 | && (comstyle != SYNTAX_FLAGS_COMMENT_STYLE (syntax) | |
595 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax) != comnested)) | |
1aa963c8 | 596 | continue; |
195d1361 | 597 | |
9828a477 KH |
598 | /* Ignore escaped characters, except comment-enders. */ |
599 | if (code != Sendcomment && char_quoted (from, from_byte)) | |
195d1361 RS |
600 | continue; |
601 | ||
3ee5041c | 602 | switch (code) |
195d1361 | 603 | { |
3ee5041c SM |
604 | case Sstring_fence: |
605 | case Scomment_fence: | |
606 | c = (code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE); | |
607 | case Sstring: | |
608 | /* Track parity of quotes. */ | |
609 | if (string_style == -1) | |
610 | /* Entering a string. */ | |
611 | string_style = c; | |
612 | else if (string_style == c) | |
613 | /* Leaving the string. */ | |
614 | string_style = -1; | |
615 | else | |
616 | /* If we have two kinds of string delimiters. | |
617 | There's no way to grok this scanning backwards. */ | |
195d1361 | 618 | string_lossage = 1; |
3ee5041c | 619 | break; |
7d0393cf | 620 | |
3ee5041c SM |
621 | case Scomment: |
622 | /* We've already checked that it is the relevant comstyle. */ | |
f7c436c1 | 623 | if (string_style != -1 || comment_lossage || string_lossage) |
3ee5041c SM |
624 | /* There are odd string quotes involved, so let's be careful. |
625 | Test case in Pascal: " { " a { " } */ | |
626 | goto lossage; | |
627 | ||
f7c436c1 SM |
628 | if (!comnested) |
629 | { | |
630 | /* Record best comment-starter so far. */ | |
631 | comstart_pos = from; | |
632 | comstart_byte = from_byte; | |
633 | } | |
634 | else if (--nesting <= 0) | |
95ff8dfc RS |
635 | /* nested comments have to be balanced, so we don't need to |
636 | keep looking for earlier ones. We use here the same (slightly | |
637 | incorrect) reasoning as below: since it is followed by uniform | |
638 | paired string quotes, this comment-start has to be outside of | |
639 | strings, else the comment-end itself would be inside a string. */ | |
640 | goto done; | |
3ee5041c SM |
641 | break; |
642 | ||
02010917 | 643 | case Sendcomment: |
3f679f55 | 644 | if (SYNTAX_FLAGS_COMMENT_STYLE (syntax) == comstyle |
d070eb22 | 645 | && ((com2end && SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax)) |
3f679f55 | 646 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested) |
02010917 SM |
647 | /* This is the same style of comment ender as ours. */ |
648 | { | |
649 | if (comnested) | |
650 | nesting++; | |
651 | else | |
652 | /* Anything before that can't count because it would match | |
653 | this comment-ender rather than ours. */ | |
654 | from = stop; /* Break out of the loop. */ | |
655 | } | |
f7c436c1 SM |
656 | else if (comstart_pos != 0 || c != '\n') |
657 | /* We're mixing comment styles here, so we'd better be careful. | |
658 | The (comstart_pos != 0 || c != '\n') check is not quite correct | |
659 | (we should just always set comment_lossage), but removing it | |
660 | would imply that any multiline comment in C would go through | |
661 | lossage, which seems overkill. | |
662 | The failure should only happen in the rare cases such as | |
663 | { (* } *) */ | |
664 | comment_lossage = 1; | |
02010917 | 665 | break; |
195d1361 | 666 | |
02010917 SM |
667 | case Sopen: |
668 | /* Assume a defun-start point is outside of strings. */ | |
669 | if (open_paren_in_column_0_is_defun_start | |
670 | && (from == stop | |
671 | || (temp_byte = dec_bytepos (from_byte), | |
672 | FETCH_CHAR (temp_byte) == '\n'))) | |
673 | { | |
674 | defun_start = from; | |
675 | defun_start_byte = from_byte; | |
676 | from = stop; /* Break out of the loop. */ | |
677 | } | |
eb35b628 | 678 | break; |
02010917 SM |
679 | |
680 | default: | |
f7c436c1 | 681 | break; |
eb35b628 | 682 | } |
195d1361 RS |
683 | } |
684 | ||
685 | if (comstart_pos == 0) | |
686 | { | |
687 | from = comment_end; | |
6a140a74 | 688 | from_byte = comment_end_byte; |
195d1361 RS |
689 | UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1); |
690 | } | |
f7c436c1 SM |
691 | /* If comstart_pos is set and we get here (ie. didn't jump to `lossage' |
692 | or `done'), then we've found the beginning of the non-nested comment. */ | |
693 | else if (1) /* !comnested */ | |
195d1361 RS |
694 | { |
695 | from = comstart_pos; | |
6a140a74 | 696 | from_byte = comstart_byte; |
789f3320 | 697 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
195d1361 RS |
698 | } |
699 | else | |
700 | { | |
3ee5041c SM |
701 | struct lisp_parse_state state; |
702 | lossage: | |
195d1361 RS |
703 | /* We had two kinds of string delimiters mixed up |
704 | together. Decode this going forwards. | |
02010917 | 705 | Scan fwd from a known safe place (beginning-of-defun) |
195d1361 RS |
706 | to the one in question; this records where we |
707 | last passed a comment starter. */ | |
eb35b628 RS |
708 | /* If we did not already find the defun start, find it now. */ |
709 | if (defun_start == 0) | |
710 | { | |
711 | defun_start = find_defun_start (comment_end, comment_end_byte); | |
712 | defun_start_byte = find_start_value_byte; | |
713 | } | |
02010917 | 714 | do |
195d1361 | 715 | { |
02010917 SM |
716 | scan_sexps_forward (&state, |
717 | defun_start, defun_start_byte, | |
718 | comment_end, -10000, 0, Qnil, 0); | |
719 | defun_start = comment_end; | |
720 | if (state.incomment == (comnested ? 1 : -1) | |
721 | && state.comstyle == comstyle) | |
722 | from = state.comstr_start; | |
723 | else | |
724 | { | |
725 | from = comment_end; | |
726 | if (state.incomment) | |
727 | /* If comment_end is inside some other comment, maybe ours | |
728 | is nested, so we need to try again from within the | |
729 | surrounding comment. Example: { a (* " *) */ | |
730 | { | |
731 | /* FIXME: We should advance by one or two chars. */ | |
732 | defun_start = state.comstr_start + 2; | |
733 | defun_start_byte = CHAR_TO_BYTE (defun_start); | |
734 | } | |
735 | } | |
736 | } while (defun_start < comment_end); | |
737 | ||
6a140a74 | 738 | from_byte = CHAR_TO_BYTE (from); |
195d1361 RS |
739 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
740 | } | |
7d0393cf | 741 | |
95ff8dfc | 742 | done: |
6a140a74 RS |
743 | *charpos_ptr = from; |
744 | *bytepos_ptr = from_byte; | |
745 | ||
1aa963c8 | 746 | return (from == comment_end) ? -1 : from; |
195d1361 RS |
747 | } |
748 | \f | |
8489eb67 | 749 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
fdb82f93 PJ |
750 | doc: /* Return t if OBJECT is a syntax table. |
751 | Currently, any char-table counts as a syntax table. */) | |
752 | (object) | |
2203e1e8 | 753 | Lisp_Object object; |
8489eb67 | 754 | { |
2203e1e8 | 755 | if (CHAR_TABLE_P (object) |
e704cb4b | 756 | && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table)) |
8489eb67 RS |
757 | return Qt; |
758 | return Qnil; | |
759 | } | |
760 | ||
8ea151b2 | 761 | static void |
8489eb67 RS |
762 | check_syntax_table (obj) |
763 | Lisp_Object obj; | |
764 | { | |
47f5f6ae KS |
765 | CHECK_TYPE (CHAR_TABLE_P (obj) && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table), |
766 | Qsyntax_table_p, obj); | |
7d0393cf | 767 | } |
8489eb67 | 768 | |
8489eb67 | 769 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, |
fdb82f93 PJ |
770 | doc: /* Return the current syntax table. |
771 | This is the one specified by the current buffer. */) | |
772 | () | |
8489eb67 RS |
773 | { |
774 | return current_buffer->syntax_table; | |
775 | } | |
776 | ||
777 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
778 | Sstandard_syntax_table, 0, 0, 0, | |
fdb82f93 PJ |
779 | doc: /* Return the standard syntax table. |
780 | This is the one used for new buffers. */) | |
781 | () | |
8489eb67 RS |
782 | { |
783 | return Vstandard_syntax_table; | |
784 | } | |
785 | ||
786 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
fdb82f93 PJ |
787 | doc: /* Construct a new syntax table and return it. |
788 | It is a copy of the TABLE, which defaults to the standard syntax table. */) | |
789 | (table) | |
8489eb67 RS |
790 | Lisp_Object table; |
791 | { | |
8ea151b2 RS |
792 | Lisp_Object copy; |
793 | ||
265a9e55 | 794 | if (!NILP (table)) |
8ea151b2 RS |
795 | check_syntax_table (table); |
796 | else | |
797 | table = Vstandard_syntax_table; | |
798 | ||
799 | copy = Fcopy_sequence (table); | |
0f867324 RS |
800 | |
801 | /* Only the standard syntax table should have a default element. | |
802 | Other syntax tables should inherit from parents instead. */ | |
803 | XCHAR_TABLE (copy)->defalt = Qnil; | |
804 | ||
805 | /* Copied syntax tables should all have parents. | |
806 | If we copied one with no parent, such as the standard syntax table, | |
807 | use the standard syntax table as the copy's parent. */ | |
808 | if (NILP (XCHAR_TABLE (copy)->parent)) | |
809 | Fset_char_table_parent (copy, Vstandard_syntax_table); | |
8ea151b2 | 810 | return copy; |
8489eb67 RS |
811 | } |
812 | ||
813 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
fdb82f93 PJ |
814 | doc: /* Select a new syntax table for the current buffer. |
815 | One argument, a syntax table. */) | |
816 | (table) | |
8489eb67 RS |
817 | Lisp_Object table; |
818 | { | |
4e4dfa78 | 819 | int idx; |
8ea151b2 | 820 | check_syntax_table (table); |
8489eb67 RS |
821 | current_buffer->syntax_table = table; |
822 | /* Indicate that this buffer now has a specified syntax table. */ | |
f6cd0527 GM |
823 | idx = PER_BUFFER_VAR_IDX (syntax_table); |
824 | SET_PER_BUFFER_VALUE_P (current_buffer, idx, 1); | |
8489eb67 RS |
825 | return table; |
826 | } | |
827 | \f | |
828 | /* Convert a letter which signifies a syntax code | |
829 | into the code it signifies. | |
195d1361 | 830 | This is used by modify-syntax-entry, and other things. */ |
8489eb67 RS |
831 | |
832 | unsigned char syntax_spec_code[0400] = | |
833 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
834 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
835 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
836 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
195d1361 | 837 | (char) Swhitespace, (char) Scomment_fence, (char) Sstring, 0377, |
8489eb67 RS |
838 | (char) Smath, 0377, 0377, (char) Squote, |
839 | (char) Sopen, (char) Sclose, 0377, 0377, | |
840 | 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
841 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
842 | 0377, 0377, 0377, 0377, | |
843 | (char) Scomment, 0377, (char) Sendcomment, 0377, | |
6cb71bf6 | 844 | (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ |
8489eb67 RS |
845 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
846 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
847 | 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
848 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
849 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
850 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
195d1361 | 851 | 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
8489eb67 RS |
852 | }; |
853 | ||
195d1361 | 854 | /* Indexed by syntax code, give the letter that describes it. */ |
8489eb67 | 855 | |
195d1361 | 856 | char syntax_code_spec[16] = |
8489eb67 | 857 | { |
195d1361 RS |
858 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@', |
859 | '!', '|' | |
8489eb67 | 860 | }; |
93da5fff KH |
861 | |
862 | /* Indexed by syntax code, give the object (cons of syntax code and | |
863 | nil) to be stored in syntax table. Since these objects can be | |
864 | shared among syntax tables, we generate them in advance. By | |
865 | sharing objects, the function `describe-syntax' can give a more | |
866 | compact listing. */ | |
867 | static Lisp_Object Vsyntax_code_object; | |
868 | ||
8489eb67 RS |
869 | \f |
870 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, | |
fdb82f93 PJ |
871 | doc: /* Return the syntax code of CHARACTER, described by a character. |
872 | For example, if CHARACTER is a word constituent, | |
873 | the character `w' is returned. | |
874 | The characters that correspond to various syntax codes | |
875 | are listed in the documentation of `modify-syntax-entry'. */) | |
876 | (character) | |
2203e1e8 | 877 | Lisp_Object character; |
8489eb67 | 878 | { |
8ea151b2 | 879 | int char_int; |
195d1361 RS |
880 | gl_state.current_syntax_table = current_buffer->syntax_table; |
881 | ||
882 | gl_state.use_global = 0; | |
b7826503 | 883 | CHECK_NUMBER (character); |
2203e1e8 | 884 | char_int = XINT (character); |
8ea151b2 | 885 | return make_number (syntax_code_spec[(int) SYNTAX (char_int)]); |
beefa22e RS |
886 | } |
887 | ||
888 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
fdb82f93 PJ |
889 | doc: /* Return the matching parenthesis of CHARACTER, or nil if none. */) |
890 | (character) | |
2203e1e8 | 891 | Lisp_Object character; |
beefa22e | 892 | { |
8ea151b2 | 893 | int char_int, code; |
195d1361 RS |
894 | gl_state.current_syntax_table = current_buffer->syntax_table; |
895 | gl_state.use_global = 0; | |
b7826503 | 896 | CHECK_NUMBER (character); |
2203e1e8 | 897 | char_int = XINT (character); |
8ea151b2 | 898 | code = SYNTAX (char_int); |
a8bd7cd8 | 899 | if (code == Sopen || code == Sclose) |
2e34157c | 900 | return SYNTAX_MATCH (char_int); |
beefa22e | 901 | return Qnil; |
8489eb67 RS |
902 | } |
903 | ||
c65adb44 | 904 | DEFUN ("string-to-syntax", Fstring_to_syntax, Sstring_to_syntax, 1, 1, 0, |
fdb82f93 PJ |
905 | doc: /* Convert a syntax specification STRING into syntax cell form. |
906 | STRING should be a string as it is allowed as argument of | |
907 | `modify-syntax-entry'. Value is the equivalent cons cell | |
bce3dc36 | 908 | \(CODE . MATCHING-CHAR) that can be used as value of a `syntax-table' |
fdb82f93 PJ |
909 | text property. */) |
910 | (string) | |
c65adb44 | 911 | Lisp_Object string; |
8489eb67 | 912 | { |
2e567bd3 | 913 | register const unsigned char *p; |
8489eb67 | 914 | register enum syntaxcode code; |
247e20a8 | 915 | int val; |
8ea151b2 | 916 | Lisp_Object match; |
8489eb67 | 917 | |
b7826503 | 918 | CHECK_STRING (string); |
8489eb67 | 919 | |
d5db4077 | 920 | p = SDATA (string); |
8489eb67 RS |
921 | code = (enum syntaxcode) syntax_spec_code[*p++]; |
922 | if (((int) code & 0377) == 0377) | |
b764a653 | 923 | error ("Invalid syntax description letter: %c", p[-1]); |
8489eb67 | 924 | |
8ea151b2 | 925 | if (code == Sinherit) |
c65adb44 | 926 | return Qnil; |
8ea151b2 RS |
927 | |
928 | if (*p) | |
d1be9f0f | 929 | { |
93da5fff | 930 | int len; |
7c19e8e1 | 931 | int character = (STRING_CHAR_AND_LENGTH |
d5db4077 | 932 | (p, SBYTES (string) - 1, len)); |
93da5fff | 933 | XSETINT (match, character); |
d1be9f0f RS |
934 | if (XFASTINT (match) == ' ') |
935 | match = Qnil; | |
93da5fff | 936 | p += len; |
d1be9f0f RS |
937 | } |
938 | else | |
8ea151b2 | 939 | match = Qnil; |
8489eb67 | 940 | |
8ea151b2 | 941 | val = (int) code; |
8489eb67 RS |
942 | while (*p) |
943 | switch (*p++) | |
944 | { | |
945 | case '1': | |
247e20a8 | 946 | val |= 1 << 16; |
8489eb67 RS |
947 | break; |
948 | ||
949 | case '2': | |
247e20a8 | 950 | val |= 1 << 17; |
8489eb67 RS |
951 | break; |
952 | ||
953 | case '3': | |
247e20a8 | 954 | val |= 1 << 18; |
8489eb67 RS |
955 | break; |
956 | ||
957 | case '4': | |
247e20a8 | 958 | val |= 1 << 19; |
8489eb67 RS |
959 | break; |
960 | ||
961 | case 'p': | |
247e20a8 | 962 | val |= 1 << 20; |
8489eb67 | 963 | break; |
e5d4f4dc RS |
964 | |
965 | case 'b': | |
247e20a8 | 966 | val |= 1 << 21; |
e5d4f4dc | 967 | break; |
95ff8dfc RS |
968 | |
969 | case 'n': | |
970 | val |= 1 << 22; | |
971 | break; | |
8489eb67 | 972 | } |
7d0393cf | 973 | |
93da5fff | 974 | if (val < XVECTOR (Vsyntax_code_object)->size && NILP (match)) |
c65adb44 | 975 | return XVECTOR (Vsyntax_code_object)->contents[val]; |
93da5fff KH |
976 | else |
977 | /* Since we can't use a shared object, let's make a new one. */ | |
c65adb44 SM |
978 | return Fcons (make_number (val), match); |
979 | } | |
980 | ||
fdb82f93 | 981 | /* I really don't know why this is interactive |
2c9e1900 | 982 | help-form should at least be made useful whilst reading the second arg. */ |
7d0393cf | 983 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, |
c65adb44 | 984 | "cSet syntax for character: \nsSet syntax for %s to: ", |
a50a10a0 | 985 | doc: /* Set syntax for character CHAR according to string NEWENTRY. |
d7ee9fab | 986 | The syntax is changed only for table SYNTAX-TABLE, which defaults to |
fdb82f93 | 987 | the current buffer's syntax table. |
5c7b02ab KH |
988 | CHAR may be a cons (MIN . MAX), in which case, syntaxes of all characters |
989 | in the range MIN and MAX are changed. | |
fdb82f93 PJ |
990 | The first character of NEWENTRY should be one of the following: |
991 | Space or - whitespace syntax. w word constituent. | |
992 | _ symbol constituent. . punctuation. | |
993 | ( open-parenthesis. ) close-parenthesis. | |
994 | " string quote. \\ escape. | |
995 | $ paired delimiter. ' expression quote or prefix operator. | |
996 | < comment starter. > comment ender. | |
997 | / character-quote. @ inherit from `standard-syntax-table'. | |
998 | | generic string fence. ! generic comment fence. | |
999 | ||
1000 | Only single-character comment start and end sequences are represented thus. | |
1001 | Two-character sequences are represented as described below. | |
1002 | The second character of NEWENTRY is the matching parenthesis, | |
1003 | used only if the first character is `(' or `)'. | |
1004 | Any additional characters are flags. | |
1005 | Defined flags are the characters 1, 2, 3, 4, b, p, and n. | |
a50a10a0 PJ |
1006 | 1 means CHAR is the start of a two-char comment start sequence. |
1007 | 2 means CHAR is the second character of such a sequence. | |
1008 | 3 means CHAR is the start of a two-char comment end sequence. | |
1009 | 4 means CHAR is the second character of such a sequence. | |
fdb82f93 PJ |
1010 | |
1011 | There can be up to two orthogonal comment sequences. This is to support | |
1012 | language modes such as C++. By default, all comment sequences are of style | |
1013 | a, but you can set the comment sequence style to b (on the second character | |
1014 | of a comment-start, or the first character of a comment-end sequence) using | |
1015 | this flag: | |
a50a10a0 PJ |
1016 | b means CHAR is part of comment sequence b. |
1017 | n means CHAR is part of a nestable comment sequence. | |
fdb82f93 | 1018 | |
a50a10a0 | 1019 | p means CHAR is a prefix character for `backward-prefix-chars'; |
fdb82f93 | 1020 | such characters are treated as whitespace when they occur |
a50a10a0 PJ |
1021 | between expressions. |
1022 | usage: (modify-syntax-entry CHAR NEWENTRY &optional SYNTAX-TABLE) */) | |
fdb82f93 | 1023 | (c, newentry, syntax_table) |
c65adb44 SM |
1024 | Lisp_Object c, newentry, syntax_table; |
1025 | { | |
5c7b02ab KH |
1026 | if (CONSP (c)) |
1027 | { | |
8f924df7 KH |
1028 | CHECK_CHARACTER_CAR (c); |
1029 | CHECK_CHARACTER_CDR (c); | |
5c7b02ab KH |
1030 | } |
1031 | else | |
1032 | CHECK_CHARACTER (c); | |
c65adb44 SM |
1033 | |
1034 | if (NILP (syntax_table)) | |
1035 | syntax_table = current_buffer->syntax_table; | |
1036 | else | |
1037 | check_syntax_table (syntax_table); | |
8489eb67 | 1038 | |
5c7b02ab KH |
1039 | newentry = Fstring_to_syntax (newentry); |
1040 | if (CONSP (c)) | |
1041 | SET_RAW_SYNTAX_ENTRY_RANGE (syntax_table, c, newentry); | |
1042 | else | |
1043 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), newentry); | |
e5b94d44 CY |
1044 | |
1045 | /* We clear the regexp cache, since character classes can now have | |
1046 | different values from those in the compiled regexps.*/ | |
1047 | clear_regexp_cache (); | |
1048 | ||
8489eb67 RS |
1049 | return Qnil; |
1050 | } | |
1051 | \f | |
1052 | /* Dump syntax table to buffer in human-readable format */ | |
1053 | ||
62abe9cb SM |
1054 | DEFUN ("internal-describe-syntax-value", Finternal_describe_syntax_value, |
1055 | Sinternal_describe_syntax_value, 1, 1, 0, | |
1056 | doc: /* Insert a description of the internal syntax description SYNTAX at point. */) | |
1057 | (syntax) | |
1058 | Lisp_Object syntax; | |
8489eb67 RS |
1059 | { |
1060 | register enum syntaxcode code; | |
e6365855 | 1061 | char desc, start1, start2, end1, end2, prefix, comstyle, comnested; |
8489eb67 | 1062 | char str[2]; |
62abe9cb | 1063 | Lisp_Object first, match_lisp, value = syntax; |
8489eb67 | 1064 | |
8ea151b2 RS |
1065 | if (NILP (value)) |
1066 | { | |
62abe9cb SM |
1067 | insert_string ("default"); |
1068 | return syntax; | |
8ea151b2 RS |
1069 | } |
1070 | ||
908b7fea KH |
1071 | if (CHAR_TABLE_P (value)) |
1072 | { | |
62abe9cb SM |
1073 | insert_string ("deeper char-table ..."); |
1074 | return syntax; | |
908b7fea KH |
1075 | } |
1076 | ||
8ea151b2 RS |
1077 | if (!CONSP (value)) |
1078 | { | |
62abe9cb SM |
1079 | insert_string ("invalid"); |
1080 | return syntax; | |
8ea151b2 RS |
1081 | } |
1082 | ||
c1d497be KR |
1083 | first = XCAR (value); |
1084 | match_lisp = XCDR (value); | |
8ea151b2 RS |
1085 | |
1086 | if (!INTEGERP (first) || !(NILP (match_lisp) || INTEGERP (match_lisp))) | |
8489eb67 | 1087 | { |
62abe9cb SM |
1088 | insert_string ("invalid"); |
1089 | return syntax; | |
8489eb67 RS |
1090 | } |
1091 | ||
e704cb4b | 1092 | code = (enum syntaxcode) (XINT (first) & 0377); |
8ea151b2 RS |
1093 | start1 = (XINT (first) >> 16) & 1; |
1094 | start2 = (XINT (first) >> 17) & 1; | |
1095 | end1 = (XINT (first) >> 18) & 1; | |
1096 | end2 = (XINT (first) >> 19) & 1; | |
1097 | prefix = (XINT (first) >> 20) & 1; | |
1098 | comstyle = (XINT (first) >> 21) & 1; | |
e6365855 | 1099 | comnested = (XINT (first) >> 22) & 1; |
8489eb67 RS |
1100 | |
1101 | if ((int) code < 0 || (int) code >= (int) Smax) | |
1102 | { | |
1103 | insert_string ("invalid"); | |
62abe9cb | 1104 | return syntax; |
8489eb67 RS |
1105 | } |
1106 | desc = syntax_code_spec[(int) code]; | |
1107 | ||
1108 | str[0] = desc, str[1] = 0; | |
1109 | insert (str, 1); | |
1110 | ||
93da5fff KH |
1111 | if (NILP (match_lisp)) |
1112 | insert (" ", 1); | |
1113 | else | |
1114 | insert_char (XINT (match_lisp)); | |
8489eb67 | 1115 | |
8489eb67 RS |
1116 | if (start1) |
1117 | insert ("1", 1); | |
1118 | if (start2) | |
1119 | insert ("2", 1); | |
1120 | ||
1121 | if (end1) | |
1122 | insert ("3", 1); | |
1123 | if (end2) | |
1124 | insert ("4", 1); | |
1125 | ||
1126 | if (prefix) | |
1127 | insert ("p", 1); | |
e5d4f4dc RS |
1128 | if (comstyle) |
1129 | insert ("b", 1); | |
e6365855 SM |
1130 | if (comnested) |
1131 | insert ("n", 1); | |
8489eb67 RS |
1132 | |
1133 | insert_string ("\twhich means: "); | |
1134 | ||
0220c518 | 1135 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
1136 | { |
1137 | case Swhitespace: | |
1138 | insert_string ("whitespace"); break; | |
1139 | case Spunct: | |
1140 | insert_string ("punctuation"); break; | |
1141 | case Sword: | |
1142 | insert_string ("word"); break; | |
1143 | case Ssymbol: | |
1144 | insert_string ("symbol"); break; | |
1145 | case Sopen: | |
1146 | insert_string ("open"); break; | |
1147 | case Sclose: | |
1148 | insert_string ("close"); break; | |
1149 | case Squote: | |
d671382e | 1150 | insert_string ("prefix"); break; |
8489eb67 RS |
1151 | case Sstring: |
1152 | insert_string ("string"); break; | |
1153 | case Smath: | |
1154 | insert_string ("math"); break; | |
1155 | case Sescape: | |
1156 | insert_string ("escape"); break; | |
1157 | case Scharquote: | |
1158 | insert_string ("charquote"); break; | |
1159 | case Scomment: | |
1160 | insert_string ("comment"); break; | |
1161 | case Sendcomment: | |
1162 | insert_string ("endcomment"); break; | |
d671382e SM |
1163 | case Sinherit: |
1164 | insert_string ("inherit"); break; | |
1165 | case Scomment_fence: | |
1166 | insert_string ("comment fence"); break; | |
1167 | case Sstring_fence: | |
1168 | insert_string ("string fence"); break; | |
8489eb67 RS |
1169 | default: |
1170 | insert_string ("invalid"); | |
62abe9cb | 1171 | return syntax; |
8489eb67 RS |
1172 | } |
1173 | ||
8ea151b2 | 1174 | if (!NILP (match_lisp)) |
8489eb67 RS |
1175 | { |
1176 | insert_string (", matches "); | |
8ea151b2 | 1177 | insert_char (XINT (match_lisp)); |
8489eb67 RS |
1178 | } |
1179 | ||
1180 | if (start1) | |
1181 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
1182 | if (start2) | |
1183 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
1184 | ||
1185 | if (end1) | |
1186 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
1187 | if (end2) | |
1188 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
1189 | if (comstyle) |
1190 | insert_string (" (comment style b)"); | |
e6365855 SM |
1191 | if (comnested) |
1192 | insert_string (" (nestable)"); | |
e5d4f4dc | 1193 | |
8489eb67 RS |
1194 | if (prefix) |
1195 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
1196 | ||
62abe9cb SM |
1197 | return syntax; |
1198 | } | |
8489eb67 | 1199 | \f |
195d1361 RS |
1200 | int parse_sexp_ignore_comments; |
1201 | ||
8f924df7 KH |
1202 | /* Char-table of functions that find the next or previous word |
1203 | boundary. */ | |
1204 | Lisp_Object Vfind_word_boundary_function_table; | |
869bb237 | 1205 | |
8489eb67 RS |
1206 | /* Return the position across COUNT words from FROM. |
1207 | If that many words cannot be found before the end of the buffer, return 0. | |
1208 | COUNT negative means scan backward and stop at word beginning. */ | |
1209 | ||
dfcf069d | 1210 | int |
8489eb67 RS |
1211 | scan_words (from, count) |
1212 | register int from, count; | |
1213 | { | |
1214 | register int beg = BEGV; | |
1215 | register int end = ZV; | |
6a140a74 | 1216 | register int from_byte = CHAR_TO_BYTE (from); |
93da5fff KH |
1217 | register enum syntaxcode code; |
1218 | int ch0, ch1; | |
8f924df7 | 1219 | Lisp_Object func, script, pos; |
8489eb67 RS |
1220 | |
1221 | immediate_quit = 1; | |
1222 | QUIT; | |
1223 | ||
195d1361 RS |
1224 | SETUP_SYNTAX_TABLE (from, count); |
1225 | ||
8489eb67 RS |
1226 | while (count > 0) |
1227 | { | |
1228 | while (1) | |
1229 | { | |
1230 | if (from == end) | |
1231 | { | |
1232 | immediate_quit = 0; | |
1233 | return 0; | |
1234 | } | |
195d1361 | 1235 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 1236 | ch0 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
93da5fff | 1237 | code = SYNTAX (ch0); |
6a140a74 | 1238 | INC_BOTH (from, from_byte); |
8489eb67 RS |
1239 | if (words_include_escapes |
1240 | && (code == Sescape || code == Scharquote)) | |
1241 | break; | |
1242 | if (code == Sword) | |
1243 | break; | |
8489eb67 | 1244 | } |
93da5fff KH |
1245 | /* Now CH0 is a character which begins a word and FROM is the |
1246 | position of the next character. */ | |
8f924df7 | 1247 | func = CHAR_TABLE_REF (Vfind_word_boundary_function_table, ch0); |
869bb237 | 1248 | if (! NILP (Ffboundp (func))) |
8489eb67 | 1249 | { |
869bb237 | 1250 | pos = call2 (func, make_number (from - 1), make_number (end)); |
8f924df7 KH |
1251 | if (INTEGERP (pos) && XINT (pos) > from) |
1252 | { | |
1253 | from = XINT (pos); | |
1254 | from_byte = CHAR_TO_BYTE (from); | |
1255 | } | |
8489eb67 | 1256 | } |
869bb237 | 1257 | else |
8cb8232a | 1258 | { |
8cb8232a KH |
1259 | script = CHAR_TABLE_REF (Vchar_script_table, ch0); |
1260 | while (1) | |
1261 | { | |
1262 | if (from == end) break; | |
1263 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
b7dbcc19 | 1264 | ch1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8cb8232a KH |
1265 | code = SYNTAX (ch1); |
1266 | if ((code != Sword | |
1267 | && (! words_include_escapes | |
1268 | || (code != Sescape && code != Scharquote))) | |
1269 | || ! EQ (CHAR_TABLE_REF (Vchar_script_table, ch1), script)) | |
869bb237 | 1270 | break; |
8cb8232a KH |
1271 | INC_BOTH (from, from_byte); |
1272 | ch0 = ch1; | |
1273 | } | |
8489eb67 RS |
1274 | } |
1275 | count--; | |
1276 | } | |
1277 | while (count < 0) | |
1278 | { | |
1279 | while (1) | |
1280 | { | |
1281 | if (from == beg) | |
1282 | { | |
1283 | immediate_quit = 0; | |
1284 | return 0; | |
1285 | } | |
6a140a74 | 1286 | DEC_BOTH (from, from_byte); |
195d1361 | 1287 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 1288 | ch1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
93da5fff | 1289 | code = SYNTAX (ch1); |
8489eb67 RS |
1290 | if (words_include_escapes |
1291 | && (code == Sescape || code == Scharquote)) | |
1292 | break; | |
1293 | if (code == Sword) | |
1294 | break; | |
8489eb67 | 1295 | } |
93da5fff KH |
1296 | /* Now CH1 is a character which ends a word and FROM is the |
1297 | position of it. */ | |
8f924df7 | 1298 | func = CHAR_TABLE_REF (Vfind_word_boundary_function_table, ch1); |
869bb237 | 1299 | if (! NILP (Ffboundp (func))) |
8f924df7 | 1300 | { |
869bb237 | 1301 | pos = call2 (func, make_number (from), make_number (beg)); |
8f924df7 KH |
1302 | if (INTEGERP (pos) && XINT (pos) < from) |
1303 | { | |
1304 | from = XINT (pos); | |
1305 | from_byte = CHAR_TO_BYTE (from); | |
1306 | } | |
8489eb67 | 1307 | } |
869bb237 | 1308 | else |
8489eb67 | 1309 | { |
8cb8232a KH |
1310 | script = CHAR_TABLE_REF (Vchar_script_table, ch1); |
1311 | while (1) | |
1312 | { | |
8cb8232a KH |
1313 | if (from == beg) |
1314 | break; | |
262be72a | 1315 | DEC_BOTH (from, from_byte); |
8cb8232a | 1316 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
262be72a | 1317 | ch0 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8cb8232a KH |
1318 | code = SYNTAX (ch0); |
1319 | if ((code != Sword | |
1320 | && (! words_include_escapes | |
1321 | || (code != Sescape && code != Scharquote))) | |
1322 | || ! EQ (CHAR_TABLE_REF (Vchar_script_table, ch0), script)) | |
262be72a MB |
1323 | { |
1324 | INC_BOTH (from, from_byte); | |
1325 | break; | |
1326 | } | |
8cb8232a KH |
1327 | ch1 = ch0; |
1328 | } | |
8489eb67 RS |
1329 | } |
1330 | count++; | |
1331 | } | |
1332 | ||
1333 | immediate_quit = 0; | |
1334 | ||
1335 | return from; | |
1336 | } | |
1337 | ||
1e9dbb5f | 1338 | DEFUN ("forward-word", Fforward_word, Sforward_word, 0, 1, "^p", |
fdb82f93 PJ |
1339 | doc: /* Move point forward ARG words (backward if ARG is negative). |
1340 | Normally returns t. | |
1341 | If an edge of the buffer or a field boundary is reached, point is left there | |
1342 | and the function returns nil. Field boundaries are not noticed if | |
1343 | `inhibit-field-text-motion' is non-nil. */) | |
839966f3 KH |
1344 | (arg) |
1345 | Lisp_Object arg; | |
8489eb67 | 1346 | { |
c096ae4d | 1347 | Lisp_Object tmp; |
2c6ea900 | 1348 | int orig_val, val; |
8489eb67 | 1349 | |
839966f3 KH |
1350 | if (NILP (arg)) |
1351 | XSETFASTINT (arg, 1); | |
1352 | else | |
1353 | CHECK_NUMBER (arg); | |
1354 | ||
1355 | val = orig_val = scan_words (PT, XINT (arg)); | |
2c6ea900 | 1356 | if (! orig_val) |
839966f3 | 1357 | val = XINT (arg) > 0 ? ZV : BEGV; |
5878ee6f | 1358 | |
b8855607 | 1359 | /* Avoid jumping out of an input field. */ |
c096ae4d SM |
1360 | tmp = Fconstrain_to_field (make_number (val), make_number (PT), |
1361 | Qt, Qnil, Qnil); | |
1362 | val = XFASTINT (tmp); | |
7d0393cf | 1363 | |
8489eb67 | 1364 | SET_PT (val); |
e6d8341f | 1365 | return val == orig_val ? Qt : Qnil; |
8489eb67 RS |
1366 | } |
1367 | \f | |
195d1361 RS |
1368 | Lisp_Object skip_chars (); |
1369 | ||
1370 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, | |
fdb82f93 PJ |
1371 | doc: /* Move point forward, stopping before a char not in STRING, or at pos LIM. |
1372 | STRING is like the inside of a `[...]' in a regular expression | |
1373 | except that `]' is never special and `\\' quotes `^', `-' or `\\' | |
1374 | (but not as the end of a range; quoting is never needed there). | |
1375 | Thus, with arg "a-zA-Z", this skips letters stopping before first nonletter. | |
1376 | With arg "^a-zA-Z", skips nonletters stopping before first letter. | |
a1bc88d4 RS |
1377 | Char classes, e.g. `[:alpha:]', are supported. |
1378 | ||
1379 | Returns the distance traveled, either zero or positive. */) | |
fdb82f93 | 1380 | (string, lim) |
195d1361 RS |
1381 | Lisp_Object string, lim; |
1382 | { | |
327719ee | 1383 | return skip_chars (1, string, lim, 1); |
195d1361 RS |
1384 | } |
1385 | ||
1386 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, | |
fdb82f93 PJ |
1387 | doc: /* Move point backward, stopping after a char not in STRING, or at pos LIM. |
1388 | See `skip-chars-forward' for details. | |
1389 | Returns the distance traveled, either zero or negative. */) | |
1390 | (string, lim) | |
195d1361 RS |
1391 | Lisp_Object string, lim; |
1392 | { | |
327719ee | 1393 | return skip_chars (0, string, lim, 1); |
195d1361 RS |
1394 | } |
1395 | ||
1396 | DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0, | |
fdb82f93 PJ |
1397 | doc: /* Move point forward across chars in specified syntax classes. |
1398 | SYNTAX is a string of syntax code characters. | |
1399 | Stop before a char whose syntax is not in SYNTAX, or at position LIM. | |
1400 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1401 | This function returns the distance traveled, either zero or positive. */) | |
1402 | (syntax, lim) | |
195d1361 RS |
1403 | Lisp_Object syntax, lim; |
1404 | { | |
b7dbcc19 | 1405 | return skip_syntaxes (1, syntax, lim); |
195d1361 RS |
1406 | } |
1407 | ||
1408 | DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0, | |
fdb82f93 PJ |
1409 | doc: /* Move point backward across chars in specified syntax classes. |
1410 | SYNTAX is a string of syntax code characters. | |
1411 | Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM. | |
1412 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1413 | This function returns the distance traveled, either zero or negative. */) | |
1414 | (syntax, lim) | |
195d1361 RS |
1415 | Lisp_Object syntax, lim; |
1416 | { | |
b7dbcc19 | 1417 | return skip_syntaxes (0, syntax, lim); |
195d1361 RS |
1418 | } |
1419 | ||
6a140a74 | 1420 | static Lisp_Object |
327719ee | 1421 | skip_chars (forwardp, string, lim, handle_iso_classes) |
b7dbcc19 | 1422 | int forwardp; |
195d1361 | 1423 | Lisp_Object string, lim; |
a1bc88d4 | 1424 | int handle_iso_classes; |
195d1361 | 1425 | { |
195d1361 RS |
1426 | register unsigned int c; |
1427 | unsigned char fastmap[0400]; | |
b7dbcc19 | 1428 | /* Store the ranges of non-ASCII characters. */ |
5df4982e | 1429 | int *char_ranges; |
7e68b0ea | 1430 | int n_char_ranges = 0; |
195d1361 | 1431 | int negate = 0; |
4101e6fe | 1432 | register int i, i_byte; |
b7dbcc19 KH |
1433 | /* Set to 1 if the current buffer is multibyte and the region |
1434 | contains non-ASCII chars. */ | |
1435 | int multibyte; | |
1436 | /* Set to 1 if STRING is multibyte and it contains non-ASCII | |
1437 | chars. */ | |
1674d9a2 RS |
1438 | int string_multibyte; |
1439 | int size_byte; | |
2e567bd3 | 1440 | const unsigned char *str; |
82d497fc | 1441 | int len; |
a1bc88d4 | 1442 | Lisp_Object iso_classes; |
195d1361 | 1443 | |
b7826503 | 1444 | CHECK_STRING (string); |
a1bc88d4 | 1445 | iso_classes = Qnil; |
82d497fc | 1446 | |
195d1361 RS |
1447 | if (NILP (lim)) |
1448 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1449 | else | |
b7826503 | 1450 | CHECK_NUMBER_COERCE_MARKER (lim); |
195d1361 RS |
1451 | |
1452 | /* In any case, don't allow scan outside bounds of buffer. */ | |
195d1361 RS |
1453 | if (XINT (lim) > ZV) |
1454 | XSETFASTINT (lim, ZV); | |
1455 | if (XINT (lim) < BEGV) | |
1456 | XSETFASTINT (lim, BEGV); | |
1457 | ||
b7dbcc19 | 1458 | multibyte = (!NILP (current_buffer->enable_multibyte_characters) |
92eaa22e | 1459 | && (XINT (lim) - PT != CHAR_TO_BYTE (XINT (lim)) - PT_BYTE)); |
8f924df7 | 1460 | string_multibyte = SBYTES (string) > SCHARS (string); |
b7dbcc19 | 1461 | |
195d1361 RS |
1462 | bzero (fastmap, sizeof fastmap); |
1463 | ||
8f924df7 KH |
1464 | str = SDATA (string); |
1465 | size_byte = SBYTES (string); | |
4101e6fe | 1466 | |
82d497fc | 1467 | i_byte = 0; |
13090112 | 1468 | if (i_byte < size_byte |
d5db4077 | 1469 | && SREF (string, 0) == '^') |
195d1361 | 1470 | { |
82d497fc | 1471 | negate = 1; i_byte++; |
195d1361 RS |
1472 | } |
1473 | ||
1474 | /* Find the characters specified and set their elements of fastmap. | |
b7dbcc19 | 1475 | Handle backslashes and ranges specially. |
195d1361 | 1476 | |
b7dbcc19 KH |
1477 | If STRING contains non-ASCII characters, setup char_ranges for |
1478 | them and use fastmap only for their leading codes. */ | |
4101e6fe | 1479 | |
b7dbcc19 | 1480 | if (! string_multibyte) |
195d1361 | 1481 | { |
b7dbcc19 | 1482 | int string_has_eight_bit = 0; |
4101e6fe | 1483 | |
b7dbcc19 KH |
1484 | /* At first setup fastmap. */ |
1485 | while (i_byte < size_byte) | |
1486 | { | |
1487 | c = str[i_byte++]; | |
1488 | ||
a1bc88d4 RS |
1489 | if (handle_iso_classes && c == '[' |
1490 | && i_byte < size_byte | |
327719ee | 1491 | && str[i_byte] == ':') |
a1bc88d4 RS |
1492 | { |
1493 | const unsigned char *class_beg = str + i_byte + 1; | |
1494 | const unsigned char *class_end = class_beg; | |
b3bda4fd | 1495 | const unsigned char *class_limit = str + size_byte - 2; |
db9cd97a | 1496 | /* Leave room for the null. */ |
a1bc88d4 RS |
1497 | unsigned char class_name[CHAR_CLASS_MAX_LENGTH + 1]; |
1498 | re_wctype_t cc; | |
1499 | ||
1500 | if (class_limit - class_beg > CHAR_CLASS_MAX_LENGTH) | |
1501 | class_limit = class_beg + CHAR_CLASS_MAX_LENGTH; | |
1502 | ||
b3bda4fd KS |
1503 | while (class_end < class_limit |
1504 | && *class_end >= 'a' && *class_end <= 'z') | |
a1bc88d4 RS |
1505 | class_end++; |
1506 | ||
b3bda4fd KS |
1507 | if (class_end == class_beg |
1508 | || *class_end != ':' || class_end[1] != ']') | |
1509 | goto not_a_class_name; | |
a1bc88d4 RS |
1510 | |
1511 | bcopy (class_beg, class_name, class_end - class_beg); | |
1512 | class_name[class_end - class_beg] = 0; | |
1513 | ||
1514 | cc = re_wctype (class_name); | |
1515 | if (cc == 0) | |
1516 | error ("Invalid ISO C character class"); | |
1517 | ||
1518 | iso_classes = Fcons (make_number (cc), iso_classes); | |
1519 | ||
1520 | i_byte = class_end + 2 - str; | |
1521 | continue; | |
1522 | } | |
1523 | ||
b3bda4fd | 1524 | not_a_class_name: |
b7dbcc19 KH |
1525 | if (c == '\\') |
1526 | { | |
13090112 | 1527 | if (i_byte == size_byte) |
4101e6fe RS |
1528 | break; |
1529 | ||
5c7b02ab | 1530 | c = str[i_byte++]; |
195d1361 | 1531 | } |
839966f3 KH |
1532 | /* Treat `-' as range character only if another character |
1533 | follows. */ | |
1534 | if (i_byte + 1 < size_byte | |
82d497fc | 1535 | && str[i_byte] == '-') |
195d1361 | 1536 | { |
9690d026 | 1537 | unsigned int c2; |
4101e6fe RS |
1538 | |
1539 | /* Skip over the dash. */ | |
82d497fc | 1540 | i_byte++; |
4101e6fe | 1541 | |
4101e6fe | 1542 | /* Get the end of the range. */ |
5c7b02ab | 1543 | c2 = str[i_byte++]; |
b7dbcc19 KH |
1544 | if (c2 == '\\' |
1545 | && i_byte < size_byte) | |
1546 | c2 = str[i_byte++]; | |
1547 | ||
8f924df7 KH |
1548 | if (c <= c2) |
1549 | { | |
1550 | while (c <= c2) | |
1551 | fastmap[c++] = 1; | |
1552 | if (! ASCII_CHAR_P (c2)) | |
1553 | string_has_eight_bit = 1; | |
1554 | } | |
195d1361 RS |
1555 | } |
1556 | else | |
b7dbcc19 KH |
1557 | { |
1558 | fastmap[c] = 1; | |
1559 | if (! ASCII_CHAR_P (c)) | |
1560 | string_has_eight_bit = 1; | |
1561 | } | |
1562 | } | |
1563 | ||
1564 | /* If the current range is multibyte and STRING contains | |
1565 | eight-bit chars, arrange fastmap and setup char_ranges for | |
1566 | the corresponding multibyte chars. */ | |
1567 | if (multibyte && string_has_eight_bit) | |
1568 | { | |
1569 | unsigned char fastmap2[0400]; | |
1570 | int range_start_byte, range_start_char; | |
1571 | ||
1572 | bcopy (fastmap2 + 0200, fastmap + 0200, 0200); | |
1573 | bzero (fastmap + 0200, 0200); | |
1574 | /* We are sure that this loop stops. */ | |
1575 | for (i = 0200; ! fastmap2[i]; i++); | |
1576 | c = unibyte_char_to_multibyte (i); | |
1577 | fastmap[CHAR_LEADING_CODE (c)] = 1; | |
1578 | range_start_byte = i; | |
1579 | range_start_char = c; | |
f003ca54 | 1580 | char_ranges = (int *) alloca (sizeof (int) * 128 * 2); |
b7dbcc19 KH |
1581 | for (i = 129; i < 0400; i++) |
1582 | { | |
1583 | c = unibyte_char_to_multibyte (i); | |
1584 | fastmap[CHAR_LEADING_CODE (c)] = 1; | |
1585 | if (i - range_start_byte != c - range_start_char) | |
1586 | { | |
1587 | char_ranges[n_char_ranges++] = range_start_char; | |
1588 | char_ranges[n_char_ranges++] = ((i - 1 - range_start_byte) | |
1589 | + range_start_char); | |
1590 | range_start_byte = i; | |
1591 | range_start_char = c; | |
8f924df7 | 1592 | } |
b7dbcc19 KH |
1593 | } |
1594 | char_ranges[n_char_ranges++] = range_start_char; | |
1595 | char_ranges[n_char_ranges++] = ((i - 1 - range_start_byte) | |
1596 | + range_start_char); | |
195d1361 RS |
1597 | } |
1598 | } | |
f003ca54 | 1599 | else /* STRING is multibyte */ |
b7dbcc19 | 1600 | { |
f003ca54 KH |
1601 | char_ranges = (int *) alloca (sizeof (int) * SCHARS (string) * 2); |
1602 | ||
b7dbcc19 | 1603 | while (i_byte < size_byte) |
195d1361 | 1604 | { |
b7dbcc19 | 1605 | unsigned char leading_code; |
5c7b02ab | 1606 | |
b7dbcc19 KH |
1607 | leading_code = str[i_byte]; |
1608 | c = STRING_CHAR_AND_LENGTH (str + i_byte, size_byte-i_byte, len); | |
1609 | i_byte += len; | |
5c7b02ab | 1610 | |
327719ee MB |
1611 | if (handle_iso_classes && c == '[' |
1612 | && i_byte < size_byte | |
1613 | && STRING_CHAR (str + i_byte, size_byte - i_byte) == ':') | |
1614 | { | |
1615 | const unsigned char *class_beg = str + i_byte + 1; | |
1616 | const unsigned char *class_end = class_beg; | |
1617 | const unsigned char *class_limit = str + size_byte - 2; | |
1618 | /* Leave room for the null. */ | |
1619 | unsigned char class_name[CHAR_CLASS_MAX_LENGTH + 1]; | |
1620 | re_wctype_t cc; | |
1621 | ||
1622 | if (class_limit - class_beg > CHAR_CLASS_MAX_LENGTH) | |
1623 | class_limit = class_beg + CHAR_CLASS_MAX_LENGTH; | |
1624 | ||
1625 | while (class_end < class_limit | |
1626 | && *class_end >= 'a' && *class_end <= 'z') | |
1627 | class_end++; | |
1628 | ||
1629 | if (class_end == class_beg | |
1630 | || *class_end != ':' || class_end[1] != ']') | |
1631 | goto not_a_class_name_multibyte; | |
1632 | ||
1633 | bcopy (class_beg, class_name, class_end - class_beg); | |
1634 | class_name[class_end - class_beg] = 0; | |
1635 | ||
1636 | cc = re_wctype (class_name); | |
1637 | if (cc == 0) | |
1638 | error ("Invalid ISO C character class"); | |
1639 | ||
1640 | iso_classes = Fcons (make_number (cc), iso_classes); | |
1641 | ||
1642 | i_byte = class_end + 2 - str; | |
1643 | continue; | |
1644 | } | |
1645 | ||
1646 | not_a_class_name_multibyte: | |
195d1361 RS |
1647 | if (c == '\\') |
1648 | { | |
13090112 | 1649 | if (i_byte == size_byte) |
4101e6fe RS |
1650 | break; |
1651 | ||
b7dbcc19 | 1652 | leading_code = str[i_byte]; |
839966f3 KH |
1653 | c = STRING_CHAR_AND_LENGTH (str + i_byte, |
1654 | size_byte - i_byte, len); | |
82d497fc | 1655 | i_byte += len; |
195d1361 | 1656 | } |
839966f3 KH |
1657 | /* Treat `-' as range character only if another character |
1658 | follows. */ | |
1659 | if (i_byte + 1 < size_byte | |
82d497fc | 1660 | && str[i_byte] == '-') |
195d1361 | 1661 | { |
9690d026 | 1662 | unsigned int c2; |
b7dbcc19 | 1663 | unsigned char leading_code2; |
4101e6fe RS |
1664 | |
1665 | /* Skip over the dash. */ | |
82d497fc | 1666 | i_byte++; |
4101e6fe | 1667 | |
4101e6fe | 1668 | /* Get the end of the range. */ |
b7dbcc19 | 1669 | leading_code2 = str[i_byte]; |
839966f3 KH |
1670 | c2 = STRING_CHAR_AND_LENGTH (str + i_byte, |
1671 | size_byte - i_byte, len); | |
82d497fc | 1672 | i_byte += len; |
7e68b0ea | 1673 | |
b7dbcc19 KH |
1674 | if (c2 == '\\' |
1675 | && i_byte < size_byte) | |
1676 | { | |
1677 | leading_code2 = str[i_byte]; | |
1678 | c2 =STRING_CHAR_AND_LENGTH (str + i_byte, size_byte-i_byte, len); | |
1679 | i_byte += len; | |
1680 | } | |
1681 | ||
f003ca54 KH |
1682 | if (c > c2) |
1683 | continue; | |
b7dbcc19 | 1684 | if (ASCII_CHAR_P (c)) |
06274af5 | 1685 | { |
5c7b02ab KH |
1686 | while (c <= c2 && c < 0x80) |
1687 | fastmap[c++] = 1; | |
b7dbcc19 KH |
1688 | leading_code = CHAR_LEADING_CODE (c); |
1689 | } | |
1690 | if (! ASCII_CHAR_P (c)) | |
1691 | { | |
1692 | while (leading_code <= leading_code2) | |
1693 | fastmap[leading_code++] = 1; | |
1694 | if (c <= c2) | |
e39091b6 | 1695 | { |
b7dbcc19 | 1696 | char_ranges[n_char_ranges++] = c; |
e39091b6 | 1697 | char_ranges[n_char_ranges++] = c2; |
06274af5 KH |
1698 | } |
1699 | } | |
195d1361 RS |
1700 | } |
1701 | else | |
7e68b0ea | 1702 | { |
b7dbcc19 | 1703 | if (ASCII_CHAR_P (c)) |
e39091b6 KH |
1704 | fastmap[c] = 1; |
1705 | else | |
7e68b0ea | 1706 | { |
b7dbcc19 | 1707 | fastmap[leading_code] = 1; |
4101e6fe RS |
1708 | char_ranges[n_char_ranges++] = c; |
1709 | char_ranges[n_char_ranges++] = c; | |
7e68b0ea RS |
1710 | } |
1711 | } | |
195d1361 | 1712 | } |
b7dbcc19 KH |
1713 | |
1714 | /* If the current range is unibyte and STRING contains non-ASCII | |
1715 | chars, arrange fastmap for the corresponding unibyte | |
1716 | chars. */ | |
1717 | ||
1718 | if (! multibyte && n_char_ranges > 0) | |
1719 | { | |
1720 | bzero (fastmap + 0200, 0200); | |
1721 | for (i = 0; i < n_char_ranges; i += 2) | |
1722 | { | |
1723 | int c1 = char_ranges[i]; | |
1724 | int c2 = char_ranges[i + 1]; | |
1725 | ||
1726 | for (; c1 <= c2; c1++) | |
2afc21f5 SM |
1727 | { |
1728 | int b = CHAR_TO_BYTE_SAFE (c1); | |
1729 | if (b >= 0) | |
1730 | fastmap[b] = 1; | |
1731 | } | |
b7dbcc19 KH |
1732 | } |
1733 | } | |
195d1361 RS |
1734 | } |
1735 | ||
9690d026 | 1736 | /* If ^ was the first character, complement the fastmap. */ |
195d1361 | 1737 | if (negate) |
b7dbcc19 KH |
1738 | { |
1739 | if (! multibyte) | |
1740 | for (i = 0; i < sizeof fastmap; i++) | |
1741 | fastmap[i] ^= 1; | |
1742 | else | |
1743 | { | |
1744 | for (i = 0; i < 0200; i++) | |
1745 | fastmap[i] ^= 1; | |
1746 | /* All non-ASCII chars possibly match. */ | |
1747 | for (; i < sizeof fastmap; i++) | |
1748 | fastmap[i] = 1; | |
1749 | } | |
1750 | } | |
195d1361 RS |
1751 | |
1752 | { | |
1753 | int start_point = PT; | |
1754 | int pos = PT; | |
6a140a74 | 1755 | int pos_byte = PT_BYTE; |
9af7511a KH |
1756 | unsigned char *p = PT_ADDR, *endp, *stop; |
1757 | ||
1758 | if (forwardp) | |
1759 | { | |
1760 | endp = (XINT (lim) == GPT) ? GPT_ADDR : CHAR_POS_ADDR (XINT (lim)); | |
d7ee9fab | 1761 | stop = (pos < GPT && GPT < XINT (lim)) ? GPT_ADDR : endp; |
9af7511a KH |
1762 | } |
1763 | else | |
1764 | { | |
1765 | endp = CHAR_POS_ADDR (XINT (lim)); | |
d7ee9fab | 1766 | stop = (pos >= GPT && GPT > XINT (lim)) ? GAP_END_ADDR : endp; |
9af7511a | 1767 | } |
195d1361 RS |
1768 | |
1769 | immediate_quit = 1; | |
b7dbcc19 | 1770 | if (forwardp) |
195d1361 | 1771 | { |
b7dbcc19 | 1772 | if (multibyte) |
8f924df7 | 1773 | while (1) |
b7dbcc19 | 1774 | { |
8f924df7 | 1775 | int nbytes; |
9af7511a | 1776 | |
8f924df7 | 1777 | if (p >= stop) |
9af7511a | 1778 | { |
8f924df7 | 1779 | if (p >= endp) |
9af7511a | 1780 | break; |
8f924df7 KH |
1781 | p = GAP_END_ADDR; |
1782 | stop = endp; | |
9af7511a | 1783 | } |
327719ee MB |
1784 | c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, nbytes); |
1785 | if (! NILP (iso_classes) && in_classes (c, iso_classes)) | |
9af7511a | 1786 | { |
327719ee | 1787 | if (negate) |
9af7511a | 1788 | break; |
327719ee MB |
1789 | else |
1790 | goto fwd_ok; | |
9af7511a | 1791 | } |
9af7511a | 1792 | |
8f924df7 | 1793 | if (! fastmap[*p]) |
b7dbcc19 KH |
1794 | break; |
1795 | if (! ASCII_CHAR_P (c)) | |
9af7511a | 1796 | { |
b7dbcc19 KH |
1797 | /* As we are looking at a multibyte character, we |
1798 | must look up the character in the table | |
1799 | CHAR_RANGES. If there's no data in the table, | |
1800 | that character is not what we want to skip. */ | |
1801 | ||
1802 | /* The following code do the right thing even if | |
1803 | n_char_ranges is zero (i.e. no data in | |
1804 | CHAR_RANGES). */ | |
1805 | for (i = 0; i < n_char_ranges; i += 2) | |
1806 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
9af7511a | 1807 | break; |
b7dbcc19 KH |
1808 | if (!(negate ^ (i < n_char_ranges))) |
1809 | break; | |
9af7511a | 1810 | } |
327719ee | 1811 | fwd_ok: |
8f924df7 | 1812 | p += nbytes, pos++, pos_byte += nbytes; |
b7dbcc19 KH |
1813 | } |
1814 | else | |
8f924df7 KH |
1815 | while (1) |
1816 | { | |
1817 | if (p >= stop) | |
9af7511a | 1818 | { |
8f924df7 | 1819 | if (p >= endp) |
9af7511a | 1820 | break; |
8f924df7 KH |
1821 | p = GAP_END_ADDR; |
1822 | stop = endp; | |
9af7511a | 1823 | } |
327719ee MB |
1824 | |
1825 | if (!NILP (iso_classes) && in_classes (*p, iso_classes)) | |
1826 | { | |
1827 | if (negate) | |
1828 | break; | |
1829 | else | |
1830 | goto fwd_unibyte_ok; | |
1831 | } | |
1832 | ||
8f924df7 KH |
1833 | if (!fastmap[*p]) |
1834 | break; | |
327719ee | 1835 | fwd_unibyte_ok: |
8f924df7 KH |
1836 | p++, pos++, pos_byte++; |
1837 | } | |
195d1361 RS |
1838 | } |
1839 | else | |
1840 | { | |
b7dbcc19 | 1841 | if (multibyte) |
8f924df7 | 1842 | while (1) |
b7dbcc19 | 1843 | { |
8f924df7 | 1844 | unsigned char *prev_p; |
9af7511a | 1845 | |
8f924df7 | 1846 | if (p <= stop) |
9af7511a | 1847 | { |
8f924df7 | 1848 | if (p <= endp) |
9af7511a | 1849 | break; |
8f924df7 KH |
1850 | p = GPT_ADDR; |
1851 | stop = endp; | |
9af7511a | 1852 | } |
8f924df7 KH |
1853 | prev_p = p; |
1854 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
327719ee | 1855 | c = STRING_CHAR (p, MAX_MULTIBYTE_LENGTH); |
a1bc88d4 | 1856 | |
327719ee MB |
1857 | if (! NILP (iso_classes) && in_classes (c, iso_classes)) |
1858 | { | |
1859 | if (negate) | |
1860 | break; | |
9690d026 | 1861 | else |
327719ee | 1862 | goto back_ok; |
7e68b0ea | 1863 | } |
a1bc88d4 | 1864 | |
8f924df7 | 1865 | if (! fastmap[*p]) |
b7dbcc19 KH |
1866 | break; |
1867 | if (! ASCII_CHAR_P (c)) | |
7e68b0ea | 1868 | { |
b7dbcc19 KH |
1869 | /* See the comment in the previous similar code. */ |
1870 | for (i = 0; i < n_char_ranges; i += 2) | |
1871 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
1872 | break; | |
1873 | if (!(negate ^ (i < n_char_ranges))) | |
1874 | break; | |
7e68b0ea | 1875 | } |
327719ee | 1876 | back_ok: |
8f924df7 | 1877 | pos--, pos_byte -= prev_p - p; |
b7dbcc19 KH |
1878 | } |
1879 | else | |
8f924df7 KH |
1880 | while (1) |
1881 | { | |
1882 | if (p <= stop) | |
9af7511a | 1883 | { |
8f924df7 | 1884 | if (p <= endp) |
9af7511a | 1885 | break; |
8f924df7 KH |
1886 | p = GPT_ADDR; |
1887 | stop = endp; | |
9af7511a | 1888 | } |
e39091b6 | 1889 | |
327719ee MB |
1890 | if (! NILP (iso_classes) && in_classes (p[-1], iso_classes)) |
1891 | { | |
1892 | if (negate) | |
1893 | break; | |
9af7511a | 1894 | else |
327719ee MB |
1895 | goto back_unibyte_ok; |
1896 | } | |
a1bc88d4 | 1897 | |
8f924df7 KH |
1898 | if (!fastmap[p[-1]]) |
1899 | break; | |
327719ee | 1900 | back_unibyte_ok: |
8f924df7 KH |
1901 | p--, pos--, pos_byte--; |
1902 | } | |
195d1361 | 1903 | } |
7e68b0ea | 1904 | |
b7dbcc19 KH |
1905 | SET_PT_BOTH (pos, pos_byte); |
1906 | immediate_quit = 0; | |
1907 | ||
1908 | return make_number (PT - start_point); | |
1909 | } | |
1910 | } | |
7e68b0ea | 1911 | |
b7dbcc19 KH |
1912 | |
1913 | static Lisp_Object | |
1914 | skip_syntaxes (forwardp, string, lim) | |
1915 | int forwardp; | |
1916 | Lisp_Object string, lim; | |
1917 | { | |
1918 | register unsigned int c; | |
1919 | unsigned char fastmap[0400]; | |
1920 | int negate = 0; | |
1921 | register int i, i_byte; | |
1922 | int multibyte; | |
1923 | int size_byte; | |
1924 | unsigned char *str; | |
1925 | ||
1926 | CHECK_STRING (string); | |
1927 | ||
1928 | if (NILP (lim)) | |
1929 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1930 | else | |
1931 | CHECK_NUMBER_COERCE_MARKER (lim); | |
1932 | ||
1933 | /* In any case, don't allow scan outside bounds of buffer. */ | |
1934 | if (XINT (lim) > ZV) | |
1935 | XSETFASTINT (lim, ZV); | |
1936 | if (XINT (lim) < BEGV) | |
1937 | XSETFASTINT (lim, BEGV); | |
1938 | ||
ade8ee9e | 1939 | if (forwardp ? (PT >= XFASTINT (lim)) : (PT <= XFASTINT (lim))) |
49feb1cd | 1940 | return make_number (0); |
8c6e735b | 1941 | |
b7dbcc19 | 1942 | multibyte = (!NILP (current_buffer->enable_multibyte_characters) |
92eaa22e | 1943 | && (XINT (lim) - PT != CHAR_TO_BYTE (XINT (lim)) - PT_BYTE)); |
b7dbcc19 KH |
1944 | |
1945 | bzero (fastmap, sizeof fastmap); | |
1946 | ||
8f924df7 KH |
1947 | if (SBYTES (string) > SCHARS (string)) |
1948 | /* As this is very rare case (syntax spec is ASCII only), don't | |
1949 | consider efficiency. */ | |
bc796a59 KH |
1950 | string = string_make_unibyte (string); |
1951 | ||
8f924df7 KH |
1952 | str = SDATA (string); |
1953 | size_byte = SBYTES (string); | |
bc796a59 | 1954 | |
b7dbcc19 KH |
1955 | i_byte = 0; |
1956 | if (i_byte < size_byte | |
8f924df7 | 1957 | && SREF (string, 0) == '^') |
b7dbcc19 KH |
1958 | { |
1959 | negate = 1; i_byte++; | |
1960 | } | |
1961 | ||
b7dbcc19 KH |
1962 | /* Find the syntaxes specified and set their elements of fastmap. */ |
1963 | ||
1964 | while (i_byte < size_byte) | |
1965 | { | |
1966 | c = str[i_byte++]; | |
8f924df7 | 1967 | fastmap[syntax_spec_code[c]] = 1; |
b7dbcc19 | 1968 | } |
195d1361 | 1969 | |
9690d026 | 1970 | /* If ^ was the first character, complement the fastmap. */ |
195d1361 RS |
1971 | if (negate) |
1972 | for (i = 0; i < sizeof fastmap; i++) | |
9690d026 | 1973 | fastmap[i] ^= 1; |
195d1361 RS |
1974 | |
1975 | { | |
1976 | int start_point = PT; | |
1977 | int pos = PT; | |
6a140a74 | 1978 | int pos_byte = PT_BYTE; |
8f924df7 KH |
1979 | unsigned char *p = PT_ADDR, *endp, *stop; |
1980 | ||
1981 | if (forwardp) | |
1982 | { | |
1983 | endp = (XINT (lim) == GPT) ? GPT_ADDR : CHAR_POS_ADDR (XINT (lim)); | |
1984 | stop = (pos < GPT && GPT < XINT (lim)) ? GPT_ADDR : endp; | |
1985 | } | |
1986 | else | |
1987 | { | |
1988 | endp = CHAR_POS_ADDR (XINT (lim)); | |
1989 | stop = (pos >= GPT && GPT > XINT (lim)) ? GAP_END_ADDR : endp; | |
1990 | } | |
195d1361 RS |
1991 | |
1992 | immediate_quit = 1; | |
b7dbcc19 KH |
1993 | SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1); |
1994 | if (forwardp) | |
195d1361 | 1995 | { |
b7dbcc19 | 1996 | if (multibyte) |
195d1361 | 1997 | { |
8f924df7 | 1998 | while (1) |
8c6e735b | 1999 | { |
8f924df7 KH |
2000 | int nbytes; |
2001 | ||
2002 | if (p >= stop) | |
2003 | { | |
2004 | if (p >= endp) | |
2005 | break; | |
2006 | p = GAP_END_ADDR; | |
2007 | stop = endp; | |
2008 | } | |
2009 | c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, nbytes); | |
2010 | if (! fastmap[(int) SYNTAX (c)]) | |
8c6e735b | 2011 | break; |
8f924df7 | 2012 | p += nbytes, pos++, pos_byte += nbytes; |
8c6e735b KH |
2013 | UPDATE_SYNTAX_TABLE_FORWARD (pos); |
2014 | } | |
195d1361 RS |
2015 | } |
2016 | else | |
2017 | { | |
8c6e735b | 2018 | while (1) |
7e68b0ea | 2019 | { |
8f924df7 KH |
2020 | if (p >= stop) |
2021 | { | |
2022 | if (p >= endp) | |
2023 | break; | |
2024 | p = GAP_END_ADDR; | |
2025 | stop = endp; | |
2026 | } | |
2027 | if (! fastmap[(int) SYNTAX (*p)]) | |
8c6e735b | 2028 | break; |
8f924df7 | 2029 | p++, pos++, pos_byte++; |
b7dbcc19 | 2030 | UPDATE_SYNTAX_TABLE_FORWARD (pos); |
195d1361 RS |
2031 | } |
2032 | } | |
2033 | } | |
2034 | else | |
2035 | { | |
b7dbcc19 | 2036 | if (multibyte) |
195d1361 | 2037 | { |
8c6e735b | 2038 | while (1) |
b7dbcc19 | 2039 | { |
8f924df7 KH |
2040 | unsigned char *prev_p; |
2041 | ||
2042 | if (p <= stop) | |
b7dbcc19 | 2043 | { |
8f924df7 KH |
2044 | if (p <= endp) |
2045 | break; | |
2046 | p = GPT_ADDR; | |
2047 | stop = endp; | |
b7dbcc19 | 2048 | } |
262be72a | 2049 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
8f924df7 KH |
2050 | prev_p = p; |
2051 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
2052 | c = STRING_CHAR (p, MAX_MULTIBYTE_LENGTH); | |
2053 | if (! fastmap[(int) SYNTAX (c)]) | |
2054 | break; | |
2055 | pos--, pos_byte -= prev_p - p; | |
b7dbcc19 | 2056 | } |
195d1361 RS |
2057 | } |
2058 | else | |
2059 | { | |
8c6e735b KH |
2060 | while (1) |
2061 | { | |
8f924df7 KH |
2062 | if (p <= stop) |
2063 | { | |
2064 | if (p <= endp) | |
2065 | break; | |
2066 | p = GPT_ADDR; | |
2067 | stop = endp; | |
2068 | } | |
102f6132 | 2069 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
8f924df7 | 2070 | if (! fastmap[(int) SYNTAX (p[-1])]) |
8c6e735b | 2071 | break; |
8f924df7 | 2072 | p--, pos--, pos_byte--; |
8c6e735b | 2073 | } |
195d1361 RS |
2074 | } |
2075 | } | |
6a140a74 RS |
2076 | |
2077 | SET_PT_BOTH (pos, pos_byte); | |
195d1361 RS |
2078 | immediate_quit = 0; |
2079 | ||
2080 | return make_number (PT - start_point); | |
2081 | } | |
2082 | } | |
a1bc88d4 RS |
2083 | |
2084 | /* Return 1 if character C belongs to one of the ISO classes | |
2085 | in the list ISO_CLASSES. Each class is represented by an | |
2086 | integer which is its type according to re_wctype. */ | |
2087 | ||
2088 | static int | |
2089 | in_classes (c, iso_classes) | |
2090 | int c; | |
2091 | Lisp_Object iso_classes; | |
2092 | { | |
2093 | int fits_class = 0; | |
2094 | ||
2095 | while (! NILP (iso_classes)) | |
2096 | { | |
2097 | Lisp_Object elt; | |
2098 | elt = XCAR (iso_classes); | |
2099 | iso_classes = XCDR (iso_classes); | |
2100 | ||
2101 | if (re_iswctype (c, XFASTINT (elt))) | |
2102 | fits_class = 1; | |
2103 | } | |
2104 | ||
2105 | return fits_class; | |
2106 | } | |
195d1361 | 2107 | \f |
95ff8dfc RS |
2108 | /* Jump over a comment, assuming we are at the beginning of one. |
2109 | FROM is the current position. | |
2110 | FROM_BYTE is the bytepos corresponding to FROM. | |
2111 | Do not move past STOP (a charpos). | |
2112 | The comment over which we have to jump is of style STYLE | |
2113 | (either SYNTAX_COMMENT_STYLE(foo) or ST_COMMENT_STYLE). | |
2114 | NESTING should be positive to indicate the nesting at the beginning | |
2115 | for nested comments and should be zero or negative else. | |
2116 | ST_COMMENT_STYLE cannot be nested. | |
2117 | PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character | |
2118 | (or 0 If the search cannot start in the middle of a two-character). | |
2119 | ||
2120 | If successful, return 1 and store the charpos of the comment's end | |
2121 | into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR. | |
2122 | Else, return 0 and store the charpos STOP into *CHARPOS_PTR, the | |
2123 | corresponding bytepos into *BYTEPOS_PTR and the current nesting | |
2124 | (as defined for state.incomment) in *INCOMMENT_PTR. | |
2125 | ||
2126 | The comment end is the last character of the comment rather than the | |
2127 | character just after the comment. | |
2128 | ||
2129 | Global syntax data is assumed to initially be valid for FROM and | |
2130 | remains valid for forward search starting at the returned position. */ | |
2131 | ||
2132 | static int | |
2133 | forw_comment (from, from_byte, stop, nesting, style, prev_syntax, | |
2134 | charpos_ptr, bytepos_ptr, incomment_ptr) | |
a0aa7fcf | 2135 | EMACS_INT from, from_byte, stop; |
95ff8dfc | 2136 | int nesting, style, prev_syntax; |
a0aa7fcf SM |
2137 | EMACS_INT *charpos_ptr, *bytepos_ptr; |
2138 | int *incomment_ptr; | |
95ff8dfc RS |
2139 | { |
2140 | register int c, c1; | |
2141 | register enum syntaxcode code; | |
2142 | register int syntax; | |
2143 | ||
2144 | if (nesting <= 0) nesting = -1; | |
2145 | ||
2146 | /* Enter the loop in the middle so that we find | |
2147 | a 2-char comment ender if we start in the middle of it. */ | |
2148 | syntax = prev_syntax; | |
2149 | if (syntax != 0) goto forw_incomment; | |
2150 | ||
2151 | while (1) | |
2152 | { | |
2153 | if (from == stop) | |
2154 | { | |
2155 | *incomment_ptr = nesting; | |
2156 | *charpos_ptr = from; | |
2157 | *bytepos_ptr = from_byte; | |
2158 | return 0; | |
2159 | } | |
8f924df7 | 2160 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2161 | syntax = SYNTAX_WITH_FLAGS (c); |
2162 | code = syntax & 0xff; | |
2163 | if (code == Sendcomment | |
2164 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
abf8a9ff SM |
2165 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) ? |
2166 | (nesting > 0 && --nesting == 0) : nesting < 0)) | |
95ff8dfc RS |
2167 | /* we have encountered a comment end of the same style |
2168 | as the comment sequence which began this comment | |
2169 | section */ | |
2170 | break; | |
2171 | if (code == Scomment_fence | |
2172 | && style == ST_COMMENT_STYLE) | |
2173 | /* we have encountered a comment end of the same style | |
2174 | as the comment sequence which began this comment | |
2175 | section. */ | |
2176 | break; | |
2177 | if (nesting > 0 | |
2178 | && code == Scomment | |
abf8a9ff | 2179 | && SYNTAX_FLAGS_COMMENT_NESTED (syntax) |
95ff8dfc RS |
2180 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style) |
2181 | /* we have encountered a nested comment of the same style | |
2182 | as the comment sequence which began this comment section */ | |
2183 | nesting++; | |
2184 | INC_BOTH (from, from_byte); | |
2185 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
7d0393cf | 2186 | |
95ff8dfc RS |
2187 | forw_incomment: |
2188 | if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
2189 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
8f924df7 | 2190 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
abf8a9ff SM |
2191 | SYNTAX_COMEND_SECOND (c1)) |
2192 | && ((SYNTAX_FLAGS_COMMENT_NESTED (syntax) || | |
2193 | SYNTAX_COMMENT_NESTED (c1)) ? nesting > 0 : nesting < 0)) | |
4ffe723b GM |
2194 | { |
2195 | if (--nesting <= 0) | |
2196 | /* we have encountered a comment end of the same style | |
2197 | as the comment sequence which began this comment | |
2198 | section */ | |
2199 | break; | |
2200 | else | |
2201 | { | |
2202 | INC_BOTH (from, from_byte); | |
2203 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2204 | } | |
2205 | } | |
95ff8dfc RS |
2206 | if (nesting > 0 |
2207 | && from < stop | |
2208 | && SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
8f924df7 | 2209 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
95ff8dfc | 2210 | SYNTAX_COMMENT_STYLE (c1) == style |
abf8a9ff SM |
2211 | && SYNTAX_COMSTART_SECOND (c1)) |
2212 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) || | |
2213 | SYNTAX_COMMENT_NESTED (c1))) | |
95ff8dfc RS |
2214 | /* we have encountered a nested comment of the same style |
2215 | as the comment sequence which began this comment | |
2216 | section */ | |
2217 | { | |
2218 | INC_BOTH (from, from_byte); | |
2219 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2220 | nesting++; | |
2221 | } | |
2222 | } | |
2223 | *charpos_ptr = from; | |
2224 | *bytepos_ptr = from_byte; | |
2225 | return 1; | |
2226 | } | |
2227 | ||
b3cfe0c8 | 2228 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
177c0ea7 | 2229 | doc: /* |
ee648c11 | 2230 | Move forward across up to COUNT comments. If COUNT is negative, move backward. |
fdb82f93 PJ |
2231 | Stop scanning if we find something other than a comment or whitespace. |
2232 | Set point to where scanning stops. | |
ee648c11 | 2233 | If COUNT comments are found as expected, with nothing except whitespace |
fdb82f93 PJ |
2234 | between them, return t; otherwise return nil. */) |
2235 | (count) | |
840f481c | 2236 | Lisp_Object count; |
b3cfe0c8 | 2237 | { |
2312c580 SM |
2238 | register EMACS_INT from; |
2239 | EMACS_INT from_byte; | |
2240 | register EMACS_INT stop; | |
8ea151b2 | 2241 | register int c, c1; |
b3cfe0c8 RS |
2242 | register enum syntaxcode code; |
2243 | int comstyle = 0; /* style of comment encountered */ | |
95ff8dfc | 2244 | int comnested = 0; /* whether the comment is nestable or not */ |
be720845 | 2245 | int found; |
2312c580 SM |
2246 | EMACS_INT count1; |
2247 | EMACS_INT out_charpos, out_bytepos; | |
95ff8dfc | 2248 | int dummy; |
840f481c | 2249 | |
b7826503 | 2250 | CHECK_NUMBER (count); |
840f481c | 2251 | count1 = XINT (count); |
195d1361 | 2252 | stop = count1 > 0 ? ZV : BEGV; |
b3cfe0c8 RS |
2253 | |
2254 | immediate_quit = 1; | |
2255 | QUIT; | |
2256 | ||
2257 | from = PT; | |
6a140a74 | 2258 | from_byte = PT_BYTE; |
b3cfe0c8 | 2259 | |
195d1361 | 2260 | SETUP_SYNTAX_TABLE (from, count1); |
840f481c | 2261 | while (count1 > 0) |
b3cfe0c8 | 2262 | { |
04882296 | 2263 | do |
b3cfe0c8 | 2264 | { |
f902a008 RS |
2265 | int comstart_first; |
2266 | ||
04882296 KH |
2267 | if (from == stop) |
2268 | { | |
ef316cf0 | 2269 | SET_PT_BOTH (from, from_byte); |
b7e6e612 | 2270 | immediate_quit = 0; |
04882296 KH |
2271 | return Qnil; |
2272 | } | |
b7dbcc19 | 2273 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
b3cfe0c8 | 2274 | code = SYNTAX (c); |
f902a008 | 2275 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 2276 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 2277 | comstyle = SYNTAX_COMMENT_STYLE (c); |
6a140a74 | 2278 | INC_BOTH (from, from_byte); |
f902a008 | 2279 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2280 | if (from < stop && comstart_first |
b7dbcc19 | 2281 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
8ea151b2 | 2282 | SYNTAX_COMSTART_SECOND (c1))) |
b3cfe0c8 | 2283 | { |
7d0393cf | 2284 | /* We have encountered a comment start sequence and we |
7fc8191e | 2285 | are ignoring all text inside comments. We must record |
b3cfe0c8 RS |
2286 | the comment style this sequence begins so that later, |
2287 | only a comment end of the same style actually ends | |
7fc8191e | 2288 | the comment section. */ |
b3cfe0c8 | 2289 | code = Scomment; |
8ea151b2 | 2290 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
95ff8dfc | 2291 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); |
6a140a74 | 2292 | INC_BOTH (from, from_byte); |
95ff8dfc | 2293 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 2294 | } |
04882296 | 2295 | } |
abf8a9ff | 2296 | while (code == Swhitespace || (code == Sendcomment && c == '\n')); |
6a140a74 | 2297 | |
da71ab91 KH |
2298 | if (code == Scomment_fence) |
2299 | comstyle = ST_COMMENT_STYLE; | |
2300 | else if (code != Scomment) | |
04882296 KH |
2301 | { |
2302 | immediate_quit = 0; | |
6a140a74 | 2303 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2304 | SET_PT_BOTH (from, from_byte); |
04882296 KH |
2305 | return Qnil; |
2306 | } | |
2307 | /* We're at the start of a comment. */ | |
95ff8dfc RS |
2308 | found = forw_comment (from, from_byte, stop, comnested, comstyle, 0, |
2309 | &out_charpos, &out_bytepos, &dummy); | |
2310 | from = out_charpos; from_byte = out_bytepos; | |
2311 | if (!found) | |
04882296 | 2312 | { |
95ff8dfc RS |
2313 | immediate_quit = 0; |
2314 | SET_PT_BOTH (from, from_byte); | |
2315 | return Qnil; | |
b3cfe0c8 | 2316 | } |
95ff8dfc RS |
2317 | INC_BOTH (from, from_byte); |
2318 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
04882296 | 2319 | /* We have skipped one comment. */ |
840f481c | 2320 | count1--; |
b3cfe0c8 RS |
2321 | } |
2322 | ||
840f481c | 2323 | while (count1 < 0) |
b3cfe0c8 | 2324 | { |
b9145dbb | 2325 | while (1) |
b3cfe0c8 | 2326 | { |
c65adb44 | 2327 | int quoted; |
f902a008 | 2328 | |
b9145dbb RS |
2329 | if (from <= stop) |
2330 | { | |
6a140a74 | 2331 | SET_PT_BOTH (BEGV, BEGV_BYTE); |
b9145dbb RS |
2332 | immediate_quit = 0; |
2333 | return Qnil; | |
2334 | } | |
b3cfe0c8 | 2335 | |
6a140a74 | 2336 | DEC_BOTH (from, from_byte); |
f902a008 | 2337 | /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */ |
6a140a74 | 2338 | quoted = char_quoted (from, from_byte); |
b7dbcc19 | 2339 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
b3cfe0c8 RS |
2340 | code = SYNTAX (c); |
2341 | comstyle = 0; | |
95ff8dfc | 2342 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2343 | if (code == Sendcomment) |
2344 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
b3cfe0c8 | 2345 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
f902a008 | 2346 | && prev_char_comend_first (from, from_byte) |
89c6809a | 2347 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
b3cfe0c8 | 2348 | { |
7fc8191e | 2349 | /* We must record the comment style encountered so that |
b3cfe0c8 | 2350 | later, we can match only the proper comment begin |
7fc8191e | 2351 | sequence of the same style. */ |
6a140a74 | 2352 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2353 | code = Sendcomment; |
2354 | /* Calling char_quoted, above, set up global syntax position | |
2355 | at the new value of FROM. */ | |
b7dbcc19 | 2356 | c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2357 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
2358 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
b3cfe0c8 RS |
2359 | } |
2360 | ||
195d1361 RS |
2361 | if (code == Scomment_fence) |
2362 | { | |
2363 | /* Skip until first preceding unquoted comment_fence. */ | |
6a140a74 | 2364 | int found = 0, ini = from, ini_byte = from_byte; |
7d0393cf | 2365 | |
6a140a74 | 2366 | while (1) |
195d1361 | 2367 | { |
6a140a74 | 2368 | DEC_BOTH (from, from_byte); |
195d1361 | 2369 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 2370 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
6a140a74 | 2371 | if (SYNTAX (c) == Scomment_fence |
7d0393cf | 2372 | && !char_quoted (from, from_byte)) |
195d1361 | 2373 | { |
7d0393cf | 2374 | found = 1; |
195d1361 RS |
2375 | break; |
2376 | } | |
fcdd4585 SM |
2377 | else if (from == stop) |
2378 | break; | |
195d1361 RS |
2379 | } |
2380 | if (found == 0) | |
2381 | { | |
2382 | from = ini; /* Set point to ini + 1. */ | |
6a140a74 | 2383 | from_byte = ini_byte; |
195d1361 RS |
2384 | goto leave; |
2385 | } | |
39c41ad4 SM |
2386 | else |
2387 | /* We have skipped one comment. */ | |
2388 | break; | |
195d1361 RS |
2389 | } |
2390 | else if (code == Sendcomment) | |
b3cfe0c8 | 2391 | { |
95ff8dfc | 2392 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2393 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2394 | if (found == -1) |
2395 | { | |
abf8a9ff SM |
2396 | if (c == '\n') |
2397 | /* This end-of-line is not an end-of-comment. | |
2398 | Treat it like a whitespace. | |
2399 | CC-mode (and maybe others) relies on this behavior. */ | |
2400 | ; | |
2401 | else | |
2402 | { | |
2403 | /* Failure: we should go back to the end of this | |
2404 | not-quite-endcomment. */ | |
2405 | if (SYNTAX(c) != code) | |
2406 | /* It was a two-char Sendcomment. */ | |
2407 | INC_BOTH (from, from_byte); | |
2408 | goto leave; | |
2409 | } | |
1aa963c8 | 2410 | } |
2b927d02 | 2411 | else |
abf8a9ff SM |
2412 | { |
2413 | /* We have skipped one comment. */ | |
2414 | from = out_charpos, from_byte = out_bytepos; | |
2415 | break; | |
2416 | } | |
b3cfe0c8 | 2417 | } |
bb0de084 | 2418 | else if (code != Swhitespace || quoted) |
b3cfe0c8 | 2419 | { |
195d1361 | 2420 | leave: |
b3cfe0c8 | 2421 | immediate_quit = 0; |
6a140a74 | 2422 | INC_BOTH (from, from_byte); |
ef316cf0 | 2423 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2424 | return Qnil; |
2425 | } | |
2426 | } | |
2427 | ||
840f481c | 2428 | count1++; |
b3cfe0c8 RS |
2429 | } |
2430 | ||
ef316cf0 | 2431 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2432 | immediate_quit = 0; |
2433 | return Qt; | |
2434 | } | |
2435 | \f | |
b7dbcc19 | 2436 | /* Return syntax code of character C if C is an ASCII character |
db9f48c3 | 2437 | or `multibyte_symbol_p' is zero. Otherwise, return Ssymbol. */ |
bd25db08 | 2438 | |
b7dbcc19 KH |
2439 | #define SYNTAX_WITH_MULTIBYTE_CHECK(c) \ |
2440 | ((ASCII_CHAR_P (c) || !multibyte_symbol_p) \ | |
bd25db08 KH |
2441 | ? SYNTAX (c) : Ssymbol) |
2442 | ||
6a140a74 | 2443 | static Lisp_Object |
8489eb67 | 2444 | scan_lists (from, count, depth, sexpflag) |
932e6895 SM |
2445 | register EMACS_INT from; |
2446 | EMACS_INT count, depth; | |
2447 | int sexpflag; | |
8489eb67 RS |
2448 | { |
2449 | Lisp_Object val; | |
932e6895 | 2450 | register EMACS_INT stop = count > 0 ? ZV : BEGV; |
93da5fff KH |
2451 | register int c, c1; |
2452 | int stringterm; | |
8489eb67 RS |
2453 | int quoted; |
2454 | int mathexit = 0; | |
93da5fff | 2455 | register enum syntaxcode code, temp_code; |
195d1361 | 2456 | int min_depth = depth; /* Err out if depth gets less than this. */ |
e5d4f4dc | 2457 | int comstyle = 0; /* style of comment encountered */ |
95ff8dfc | 2458 | int comnested = 0; /* whether the comment is nestable or not */ |
932e6895 SM |
2459 | EMACS_INT temp_pos; |
2460 | EMACS_INT last_good = from; | |
195d1361 | 2461 | int found; |
932e6895 SM |
2462 | EMACS_INT from_byte; |
2463 | EMACS_INT out_bytepos, out_charpos; | |
95ff8dfc | 2464 | int temp, dummy; |
bd25db08 | 2465 | int multibyte_symbol_p = sexpflag && multibyte_syntax_as_symbol; |
8489eb67 RS |
2466 | |
2467 | if (depth > 0) min_depth = 0; | |
2468 | ||
c3907a7e RS |
2469 | if (from > ZV) from = ZV; |
2470 | if (from < BEGV) from = BEGV; | |
2471 | ||
2472 | from_byte = CHAR_TO_BYTE (from); | |
2473 | ||
8489eb67 RS |
2474 | immediate_quit = 1; |
2475 | QUIT; | |
2476 | ||
195d1361 | 2477 | SETUP_SYNTAX_TABLE (from, count); |
8489eb67 RS |
2478 | while (count > 0) |
2479 | { | |
8489eb67 RS |
2480 | while (from < stop) |
2481 | { | |
f902a008 | 2482 | int comstart_first, prefix; |
195d1361 | 2483 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 2484 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
bd25db08 | 2485 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
f902a008 | 2486 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 2487 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 2488 | comstyle = SYNTAX_COMMENT_STYLE (c); |
f902a008 | 2489 | prefix = SYNTAX_PREFIX (c); |
7bf5e9e4 RS |
2490 | if (depth == min_depth) |
2491 | last_good = from; | |
6a140a74 | 2492 | INC_BOTH (from, from_byte); |
195d1361 | 2493 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2494 | if (from < stop && comstart_first |
327719ee MB |
2495 | && (c = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
2496 | SYNTAX_COMSTART_SECOND (c)) | |
8489eb67 | 2497 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2498 | { |
7d0393cf | 2499 | /* we have encountered a comment start sequence and we |
195d1361 | 2500 | are ignoring all text inside comments. We must record |
e5d4f4dc RS |
2501 | the comment style this sequence begins so that later, |
2502 | only a comment end of the same style actually ends | |
2503 | the comment section */ | |
2504 | code = Scomment; | |
b7dbcc19 | 2505 | c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2506 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
2507 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
6a140a74 | 2508 | INC_BOTH (from, from_byte); |
f902a008 | 2509 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
e5d4f4dc | 2510 | } |
7d0393cf | 2511 | |
f902a008 | 2512 | if (prefix) |
8489eb67 RS |
2513 | continue; |
2514 | ||
0220c518 | 2515 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2516 | { |
2517 | case Sescape: | |
2518 | case Scharquote: | |
8b8bf8e6 SM |
2519 | if (from == stop) |
2520 | goto lose; | |
6a140a74 | 2521 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2522 | /* treat following character as a word constituent */ |
2523 | case Sword: | |
2524 | case Ssymbol: | |
2525 | if (depth || !sexpflag) break; | |
195d1361 | 2526 | /* This word counts as a sexp; return at end of it. */ |
8489eb67 RS |
2527 | while (from < stop) |
2528 | { | |
195d1361 | 2529 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
7c7ca3d2 RS |
2530 | |
2531 | /* Some compilers can't handle this inside the switch. */ | |
b7dbcc19 | 2532 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
bd25db08 | 2533 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7c7ca3d2 | 2534 | switch (temp) |
8489eb67 RS |
2535 | { |
2536 | case Scharquote: | |
2537 | case Sescape: | |
6a140a74 | 2538 | INC_BOTH (from, from_byte); |
8b8bf8e6 SM |
2539 | if (from == stop) |
2540 | goto lose; | |
8489eb67 RS |
2541 | break; |
2542 | case Sword: | |
2543 | case Ssymbol: | |
2544 | case Squote: | |
2545 | break; | |
2546 | default: | |
2547 | goto done; | |
2548 | } | |
6a140a74 | 2549 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2550 | } |
2551 | goto done; | |
2552 | ||
195d1361 | 2553 | case Scomment_fence: |
95ff8dfc RS |
2554 | comstyle = ST_COMMENT_STYLE; |
2555 | /* FALLTHROUGH */ | |
2556 | case Scomment: | |
8489eb67 | 2557 | if (!parse_sexp_ignore_comments) break; |
95ff8dfc RS |
2558 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2559 | found = forw_comment (from, from_byte, stop, | |
2560 | comnested, comstyle, 0, | |
2561 | &out_charpos, &out_bytepos, &dummy); | |
2562 | from = out_charpos, from_byte = out_bytepos; | |
2563 | if (!found) | |
8489eb67 | 2564 | { |
95ff8dfc RS |
2565 | if (depth == 0) |
2566 | goto done; | |
2567 | goto lose; | |
8489eb67 | 2568 | } |
95ff8dfc RS |
2569 | INC_BOTH (from, from_byte); |
2570 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
8489eb67 RS |
2571 | break; |
2572 | ||
2573 | case Smath: | |
2574 | if (!sexpflag) | |
2575 | break; | |
b7dbcc19 | 2576 | if (from != stop && c == FETCH_CHAR_AS_MULTIBYTE (from_byte)) |
6a140a74 RS |
2577 | { |
2578 | INC_BOTH (from, from_byte); | |
2579 | } | |
8489eb67 RS |
2580 | if (mathexit) |
2581 | { | |
2582 | mathexit = 0; | |
2583 | goto close1; | |
2584 | } | |
2585 | mathexit = 1; | |
2586 | ||
2587 | case Sopen: | |
2588 | if (!++depth) goto done; | |
2589 | break; | |
2590 | ||
2591 | case Sclose: | |
2592 | close1: | |
2593 | if (!--depth) goto done; | |
2594 | if (depth < min_depth) | |
9471945b KS |
2595 | xsignal3 (Qscan_error, |
2596 | build_string ("Containing expression ends prematurely"), | |
2597 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2598 | break; |
2599 | ||
2600 | case Sstring: | |
195d1361 | 2601 | case Sstring_fence: |
ef316cf0 | 2602 | temp_pos = dec_bytepos (from_byte); |
b7dbcc19 | 2603 | stringterm = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
8489eb67 RS |
2604 | while (1) |
2605 | { | |
8b8bf8e6 SM |
2606 | if (from >= stop) |
2607 | goto lose; | |
195d1361 | 2608 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 2609 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
42ebfa31 SM |
2610 | if (code == Sstring |
2611 | ? (c == stringterm | |
2612 | && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring) | |
bd25db08 | 2613 | : SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring_fence) |
195d1361 | 2614 | break; |
7c7ca3d2 RS |
2615 | |
2616 | /* Some compilers can't handle this inside the switch. */ | |
bd25db08 | 2617 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7c7ca3d2 | 2618 | switch (temp) |
8489eb67 RS |
2619 | { |
2620 | case Scharquote: | |
2621 | case Sescape: | |
6a140a74 | 2622 | INC_BOTH (from, from_byte); |
8489eb67 | 2623 | } |
6a140a74 | 2624 | INC_BOTH (from, from_byte); |
8489eb67 | 2625 | } |
6a140a74 | 2626 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2627 | if (!depth && sexpflag) goto done; |
2628 | break; | |
240c43e8 SM |
2629 | default: |
2630 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2631 | break; | |
8489eb67 RS |
2632 | } |
2633 | } | |
2634 | ||
2635 | /* Reached end of buffer. Error if within object, return nil if between */ | |
8b8bf8e6 SM |
2636 | if (depth) |
2637 | goto lose; | |
8489eb67 RS |
2638 | |
2639 | immediate_quit = 0; | |
2640 | return Qnil; | |
2641 | ||
2642 | /* End of object reached */ | |
2643 | done: | |
2644 | count--; | |
2645 | } | |
2646 | ||
2647 | while (count < 0) | |
2648 | { | |
8489eb67 RS |
2649 | while (from > stop) |
2650 | { | |
6a140a74 | 2651 | DEC_BOTH (from, from_byte); |
195d1361 | 2652 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 2653 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
bd25db08 | 2654 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7bf5e9e4 RS |
2655 | if (depth == min_depth) |
2656 | last_good = from; | |
7fc8191e | 2657 | comstyle = 0; |
95ff8dfc | 2658 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2659 | if (code == Sendcomment) |
2660 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 | 2661 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1674d9a2 | 2662 | && prev_char_comend_first (from, from_byte) |
8489eb67 | 2663 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2664 | { |
f902a008 | 2665 | /* We must record the comment style encountered so that |
e5d4f4dc | 2666 | later, we can match only the proper comment begin |
f902a008 | 2667 | sequence of the same style. */ |
6a140a74 | 2668 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2669 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
2670 | code = Sendcomment; | |
b7dbcc19 | 2671 | c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2672 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
2673 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
e5d4f4dc | 2674 | } |
7d0393cf | 2675 | |
9828a477 | 2676 | /* Quoting turns anything except a comment-ender |
e6365855 | 2677 | into a word character. Note that this cannot be true |
f902a008 | 2678 | if we decremented FROM in the if-statement above. */ |
9828a477 | 2679 | if (code != Sendcomment && char_quoted (from, from_byte)) |
240c43e8 SM |
2680 | { |
2681 | DEC_BOTH (from, from_byte); | |
2682 | code = Sword; | |
2683 | } | |
9828a477 | 2684 | else if (SYNTAX_PREFIX (c)) |
8489eb67 RS |
2685 | continue; |
2686 | ||
9828a477 | 2687 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2688 | { |
2689 | case Sword: | |
2690 | case Ssymbol: | |
9828a477 KH |
2691 | case Sescape: |
2692 | case Scharquote: | |
8489eb67 | 2693 | if (depth || !sexpflag) break; |
195d1361 RS |
2694 | /* This word counts as a sexp; count object finished |
2695 | after passing it. */ | |
8489eb67 RS |
2696 | while (from > stop) |
2697 | { | |
6a140a74 | 2698 | temp_pos = from_byte; |
ef316cf0 RS |
2699 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2700 | DEC_POS (temp_pos); | |
2701 | else | |
2702 | temp_pos--; | |
6a140a74 | 2703 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
b7dbcc19 | 2704 | c1 = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
bd25db08 | 2705 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
9828a477 KH |
2706 | /* Don't allow comment-end to be quoted. */ |
2707 | if (temp_code == Sendcomment) | |
2708 | goto done2; | |
6a140a74 | 2709 | quoted = char_quoted (from - 1, temp_pos); |
8489eb67 | 2710 | if (quoted) |
93da5fff | 2711 | { |
6a140a74 | 2712 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2713 | temp_pos = dec_bytepos (temp_pos); |
6a140a74 | 2714 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff | 2715 | } |
b7dbcc19 | 2716 | c1 = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
bd25db08 | 2717 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
93da5fff KH |
2718 | if (! (quoted || temp_code == Sword |
2719 | || temp_code == Ssymbol | |
2720 | || temp_code == Squote)) | |
8489eb67 | 2721 | goto done2; |
6a140a74 | 2722 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2723 | } |
2724 | goto done2; | |
2725 | ||
2726 | case Smath: | |
2727 | if (!sexpflag) | |
2728 | break; | |
ef316cf0 | 2729 | temp_pos = dec_bytepos (from_byte); |
6a140a74 | 2730 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
b7dbcc19 | 2731 | if (from != stop && c == FETCH_CHAR_AS_MULTIBYTE (temp_pos)) |
6a140a74 | 2732 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2733 | if (mathexit) |
2734 | { | |
2735 | mathexit = 0; | |
2736 | goto open2; | |
2737 | } | |
2738 | mathexit = 1; | |
2739 | ||
2740 | case Sclose: | |
2741 | if (!++depth) goto done2; | |
2742 | break; | |
2743 | ||
2744 | case Sopen: | |
2745 | open2: | |
2746 | if (!--depth) goto done2; | |
2747 | if (depth < min_depth) | |
9471945b KS |
2748 | xsignal3 (Qscan_error, |
2749 | build_string ("Containing expression ends prematurely"), | |
2750 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2751 | break; |
2752 | ||
2753 | case Sendcomment: | |
2754 | if (!parse_sexp_ignore_comments) | |
2755 | break; | |
95ff8dfc | 2756 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2757 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2758 | /* FIXME: if found == -1, then it really wasn't a comment-end. |
2759 | For single-char Sendcomment, we can't do much about it apart | |
2760 | from skipping the char. | |
2761 | For 2-char endcomments, we could try again, taking both | |
2762 | chars as separate entities, but it's a lot of trouble | |
2763 | for very little gain, so we don't bother either. -sm */ | |
6a140a74 RS |
2764 | if (found != -1) |
2765 | from = out_charpos, from_byte = out_bytepos; | |
8489eb67 RS |
2766 | break; |
2767 | ||
195d1361 RS |
2768 | case Scomment_fence: |
2769 | case Sstring_fence: | |
2770 | while (1) | |
2771 | { | |
8b8bf8e6 SM |
2772 | if (from == stop) |
2773 | goto lose; | |
6b61353c | 2774 | DEC_BOTH (from, from_byte); |
195d1361 | 2775 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
7d0393cf | 2776 | if (!char_quoted (from, from_byte) |
b7dbcc19 | 2777 | && (c = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
bd25db08 | 2778 | SYNTAX_WITH_MULTIBYTE_CHECK (c) == code)) |
195d1361 RS |
2779 | break; |
2780 | } | |
2781 | if (code == Sstring_fence && !depth && sexpflag) goto done2; | |
2782 | break; | |
7d0393cf | 2783 | |
8489eb67 | 2784 | case Sstring: |
b7dbcc19 | 2785 | stringterm = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8489eb67 RS |
2786 | while (1) |
2787 | { | |
8b8bf8e6 SM |
2788 | if (from == stop) |
2789 | goto lose; | |
6b61353c KH |
2790 | DEC_BOTH (from, from_byte); |
2791 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
2792 | if (!char_quoted (from, from_byte) | |
2793 | && (stringterm | |
2794 | == (c = FETCH_CHAR_AS_MULTIBYTE (from_byte))) | |
42ebfa31 | 2795 | && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring) |
8489eb67 | 2796 | break; |
8489eb67 | 2797 | } |
8489eb67 RS |
2798 | if (!depth && sexpflag) goto done2; |
2799 | break; | |
240c43e8 SM |
2800 | default: |
2801 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2802 | break; | |
8489eb67 RS |
2803 | } |
2804 | } | |
2805 | ||
2806 | /* Reached start of buffer. Error if within object, return nil if between */ | |
8b8bf8e6 SM |
2807 | if (depth) |
2808 | goto lose; | |
8489eb67 RS |
2809 | |
2810 | immediate_quit = 0; | |
2811 | return Qnil; | |
2812 | ||
2813 | done2: | |
2814 | count++; | |
2815 | } | |
2816 | ||
2817 | ||
2818 | immediate_quit = 0; | |
1e142fb7 | 2819 | XSETFASTINT (val, from); |
8489eb67 RS |
2820 | return val; |
2821 | ||
2822 | lose: | |
9471945b KS |
2823 | xsignal3 (Qscan_error, |
2824 | build_string ("Unbalanced parentheses"), | |
2825 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2826 | } |
2827 | ||
8489eb67 | 2828 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, |
fdb82f93 PJ |
2829 | doc: /* Scan from character number FROM by COUNT lists. |
2830 | Returns the character number of the position thus found. | |
2831 | ||
2832 | If DEPTH is nonzero, paren depth begins counting from that value, | |
2833 | only places where the depth in parentheses becomes zero | |
2834 | are candidates for stopping; COUNT such places are counted. | |
2835 | Thus, a positive value for DEPTH means go out levels. | |
2836 | ||
2837 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2838 | ||
2839 | If the beginning or end of (the accessible part of) the buffer is reached | |
2840 | and the depth is wrong, an error is signaled. | |
2841 | If the depth is right but the count is not used up, nil is returned. */) | |
2842 | (from, count, depth) | |
8489eb67 RS |
2843 | Lisp_Object from, count, depth; |
2844 | { | |
b7826503 PJ |
2845 | CHECK_NUMBER (from); |
2846 | CHECK_NUMBER (count); | |
2847 | CHECK_NUMBER (depth); | |
8489eb67 RS |
2848 | |
2849 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
2850 | } | |
2851 | ||
2852 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
fdb82f93 PJ |
2853 | doc: /* Scan from character number FROM by COUNT balanced expressions. |
2854 | If COUNT is negative, scan backwards. | |
2855 | Returns the character number of the position thus found. | |
2856 | ||
2857 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2858 | ||
2859 | If the beginning or end of (the accessible part of) the buffer is reached | |
2860 | in the middle of a parenthetical grouping, an error is signaled. | |
2861 | If the beginning or end is reached between groupings | |
2862 | but before count is used up, nil is returned. */) | |
2863 | (from, count) | |
8489eb67 RS |
2864 | Lisp_Object from, count; |
2865 | { | |
b7826503 PJ |
2866 | CHECK_NUMBER (from); |
2867 | CHECK_NUMBER (count); | |
8489eb67 RS |
2868 | |
2869 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
2870 | } | |
2871 | ||
2872 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
fdb82f93 PJ |
2873 | 0, 0, 0, |
2874 | doc: /* Move point backward over any number of chars with prefix syntax. | |
2875 | This includes chars with "quote" or "prefix" syntax (' or p). */) | |
2876 | () | |
8489eb67 RS |
2877 | { |
2878 | int beg = BEGV; | |
6a140a74 RS |
2879 | int opoint = PT; |
2880 | int opoint_byte = PT_BYTE; | |
6ec8bbd2 | 2881 | int pos = PT; |
6a140a74 | 2882 | int pos_byte = PT_BYTE; |
93da5fff | 2883 | int c; |
93da5fff | 2884 | |
7d0393cf | 2885 | if (pos <= beg) |
195d1361 | 2886 | { |
f902a008 RS |
2887 | SET_PT_BOTH (opoint, opoint_byte); |
2888 | ||
2889 | return Qnil; | |
195d1361 | 2890 | } |
8489eb67 | 2891 | |
f902a008 RS |
2892 | SETUP_SYNTAX_TABLE (pos, -1); |
2893 | ||
6a140a74 RS |
2894 | DEC_BOTH (pos, pos_byte); |
2895 | ||
1fd3172d | 2896 | while (!char_quoted (pos, pos_byte) |
195d1361 | 2897 | /* Previous statement updates syntax table. */ |
b7dbcc19 | 2898 | && ((c = FETCH_CHAR_AS_MULTIBYTE (pos_byte), SYNTAX (c) == Squote) |
93da5fff KH |
2899 | || SYNTAX_PREFIX (c))) |
2900 | { | |
1fd3172d RS |
2901 | opoint = pos; |
2902 | opoint_byte = pos_byte; | |
2903 | ||
2904 | if (pos + 1 > beg) | |
2905 | DEC_BOTH (pos, pos_byte); | |
93da5fff | 2906 | } |
8489eb67 | 2907 | |
6a140a74 | 2908 | SET_PT_BOTH (opoint, opoint_byte); |
8489eb67 RS |
2909 | |
2910 | return Qnil; | |
2911 | } | |
2912 | \f | |
6a140a74 | 2913 | /* Parse forward from FROM / FROM_BYTE to END, |
e5d4f4dc RS |
2914 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
2915 | and return a description of the state of the parse at END. | |
c81a3712 | 2916 | If STOPBEFORE is nonzero, stop at the start of an atom. |
644ea4df RS |
2917 | If COMMENTSTOP is 1, stop at the start of a comment. |
2918 | If COMMENTSTOP is -1, stop at the start or end of a comment, | |
2919 | after the beginning of a string, or after the end of a string. */ | |
8489eb67 | 2920 | |
340f92b5 | 2921 | static void |
6a140a74 | 2922 | scan_sexps_forward (stateptr, from, from_byte, end, targetdepth, |
c81a3712 | 2923 | stopbefore, oldstate, commentstop) |
e5d4f4dc | 2924 | struct lisp_parse_state *stateptr; |
8489eb67 | 2925 | register int from; |
38355d47 | 2926 | int from_byte; |
8489eb67 RS |
2927 | int end, targetdepth, stopbefore; |
2928 | Lisp_Object oldstate; | |
c81a3712 | 2929 | int commentstop; |
8489eb67 RS |
2930 | { |
2931 | struct lisp_parse_state state; | |
2932 | ||
2933 | register enum syntaxcode code; | |
95ff8dfc RS |
2934 | int c1; |
2935 | int comnested; | |
8489eb67 RS |
2936 | struct level { int last, prev; }; |
2937 | struct level levelstart[100]; | |
2938 | register struct level *curlevel = levelstart; | |
2939 | struct level *endlevel = levelstart + 100; | |
8489eb67 RS |
2940 | register int depth; /* Paren depth of current scanning location. |
2941 | level - levelstart equals this except | |
2942 | when the depth becomes negative. */ | |
2943 | int mindepth; /* Lowest DEPTH value seen. */ | |
2944 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
2945 | Lisp_Object tem; | |
93da5fff | 2946 | int prev_from; /* Keep one character before FROM. */ |
6a140a74 | 2947 | int prev_from_byte; |
1fd3172d | 2948 | int prev_from_syntax; |
195d1361 RS |
2949 | int boundary_stop = commentstop == -1; |
2950 | int nofence; | |
95ff8dfc | 2951 | int found; |
60c86a83 | 2952 | EMACS_INT out_bytepos, out_charpos; |
7c7ca3d2 | 2953 | int temp; |
93da5fff KH |
2954 | |
2955 | prev_from = from; | |
6a140a74 RS |
2956 | prev_from_byte = from_byte; |
2957 | if (from != BEGV) | |
2958 | DEC_BOTH (prev_from, prev_from_byte); | |
93da5fff KH |
2959 | |
2960 | /* Use this macro instead of `from++'. */ | |
6a140a74 RS |
2961 | #define INC_FROM \ |
2962 | do { prev_from = from; \ | |
2963 | prev_from_byte = from_byte; \ | |
327719ee | 2964 | temp = FETCH_CHAR_AS_MULTIBYTE (prev_from_byte); \ |
ab229fdd | 2965 | prev_from_syntax = SYNTAX_WITH_FLAGS (temp); \ |
ef316cf0 | 2966 | INC_BOTH (from, from_byte); \ |
3ceb4629 SM |
2967 | if (from < end) \ |
2968 | UPDATE_SYNTAX_TABLE_FORWARD (from); \ | |
6a140a74 | 2969 | } while (0) |
8489eb67 RS |
2970 | |
2971 | immediate_quit = 1; | |
2972 | QUIT; | |
2973 | ||
265a9e55 | 2974 | if (NILP (oldstate)) |
8489eb67 RS |
2975 | { |
2976 | depth = 0; | |
2977 | state.instring = -1; | |
2978 | state.incomment = 0; | |
195d1361 RS |
2979 | state.comstyle = 0; /* comment style a by default. */ |
2980 | state.comstr_start = -1; /* no comment/string seen. */ | |
8489eb67 RS |
2981 | } |
2982 | else | |
2983 | { | |
2984 | tem = Fcar (oldstate); | |
265a9e55 | 2985 | if (!NILP (tem)) |
8489eb67 RS |
2986 | depth = XINT (tem); |
2987 | else | |
2988 | depth = 0; | |
2989 | ||
2990 | oldstate = Fcdr (oldstate); | |
2991 | oldstate = Fcdr (oldstate); | |
2992 | oldstate = Fcdr (oldstate); | |
2993 | tem = Fcar (oldstate); | |
195d1361 | 2994 | /* Check whether we are inside string_fence-style string: */ |
7d0393cf JB |
2995 | state.instring = (!NILP (tem) |
2996 | ? (INTEGERP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
e76f1c44 | 2997 | : -1); |
8489eb67 RS |
2998 | |
2999 | oldstate = Fcdr (oldstate); | |
3000 | tem = Fcar (oldstate); | |
e76f1c44 GM |
3001 | state.incomment = (!NILP (tem) |
3002 | ? (INTEGERP (tem) ? XINT (tem) : -1) | |
95ff8dfc | 3003 | : 0); |
8489eb67 RS |
3004 | |
3005 | oldstate = Fcdr (oldstate); | |
3006 | tem = Fcar (oldstate); | |
265a9e55 | 3007 | start_quoted = !NILP (tem); |
e5d4f4dc | 3008 | |
95ff8dfc | 3009 | /* if the eighth element of the list is nil, we are in comment |
195d1361 RS |
3010 | style a. If it is non-nil, we are in comment style b */ |
3011 | oldstate = Fcdr (oldstate); | |
e5d4f4dc | 3012 | oldstate = Fcdr (oldstate); |
195d1361 | 3013 | tem = Fcar (oldstate); |
7d0393cf | 3014 | state.comstyle = NILP (tem) ? 0 : (EQ (tem, Qsyntax_table) |
e76f1c44 | 3015 | ? ST_COMMENT_STYLE : 1); |
195d1361 | 3016 | |
e5d4f4dc | 3017 | oldstate = Fcdr (oldstate); |
e5d4f4dc | 3018 | tem = Fcar (oldstate); |
195d1361 | 3019 | state.comstr_start = NILP (tem) ? -1 : XINT (tem) ; |
1a102a58 RS |
3020 | oldstate = Fcdr (oldstate); |
3021 | tem = Fcar (oldstate); | |
3022 | while (!NILP (tem)) /* >= second enclosing sexps. */ | |
3023 | { | |
3024 | /* curlevel++->last ran into compiler bug on Apollo */ | |
3025 | curlevel->last = XINT (Fcar (tem)); | |
3026 | if (++curlevel == endlevel) | |
02010917 | 3027 | curlevel--; /* error ("Nesting too deep for parser"); */ |
1a102a58 RS |
3028 | curlevel->prev = -1; |
3029 | curlevel->last = -1; | |
3030 | tem = Fcdr (tem); | |
3031 | } | |
8489eb67 RS |
3032 | } |
3033 | state.quoted = 0; | |
3034 | mindepth = depth; | |
3035 | ||
3036 | curlevel->prev = -1; | |
3037 | curlevel->last = -1; | |
3038 | ||
326b283b | 3039 | SETUP_SYNTAX_TABLE (prev_from, 1); |
ab229fdd AS |
3040 | temp = FETCH_CHAR (prev_from_byte); |
3041 | prev_from_syntax = SYNTAX_WITH_FLAGS (temp); | |
3ceb4629 | 3042 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
326b283b | 3043 | |
195d1361 | 3044 | /* Enter the loop at a place appropriate for initial state. */ |
8489eb67 | 3045 | |
326b283b RS |
3046 | if (state.incomment) |
3047 | goto startincomment; | |
8489eb67 RS |
3048 | if (state.instring >= 0) |
3049 | { | |
195d1361 | 3050 | nofence = state.instring != ST_STRING_STYLE; |
326b283b RS |
3051 | if (start_quoted) |
3052 | goto startquotedinstring; | |
8489eb67 RS |
3053 | goto startinstring; |
3054 | } | |
326b283b RS |
3055 | else if (start_quoted) |
3056 | goto startquoted; | |
1fd3172d | 3057 | |
8489eb67 RS |
3058 | while (from < end) |
3059 | { | |
93da5fff | 3060 | INC_FROM; |
1fd3172d | 3061 | code = prev_from_syntax & 0xff; |
4c920633 | 3062 | |
c5d4b96f SM |
3063 | if (from < end |
3064 | && SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax) | |
3065 | && (c1 = FETCH_CHAR (from_byte), | |
3066 | SYNTAX_COMSTART_SECOND (c1))) | |
3067 | /* Duplicate code to avoid a complex if-expression | |
3068 | which causes trouble for the SGI compiler. */ | |
95ff8dfc | 3069 | { |
c5d4b96f SM |
3070 | /* Record the comment style we have entered so that only |
3071 | the comment-end sequence of the same style actually | |
3072 | terminates the comment section. */ | |
3073 | state.comstyle = SYNTAX_COMMENT_STYLE (c1); | |
3074 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax); | |
3075 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
3076 | state.incomment = comnested ? 1 : -1; | |
95ff8dfc | 3077 | state.comstr_start = prev_from; |
c5d4b96f SM |
3078 | INC_FROM; |
3079 | code = Scomment; | |
95ff8dfc | 3080 | } |
4c920633 | 3081 | else if (code == Scomment_fence) |
e5d4f4dc RS |
3082 | { |
3083 | /* Record the comment style we have entered so that only | |
3084 | the comment-end sequence of the same style actually | |
3085 | terminates the comment section. */ | |
95ff8dfc RS |
3086 | state.comstyle = ST_COMMENT_STYLE; |
3087 | state.incomment = -1; | |
195d1361 | 3088 | state.comstr_start = prev_from; |
e5d4f4dc | 3089 | code = Scomment; |
e5d4f4dc | 3090 | } |
c5d4b96f SM |
3091 | else if (code == Scomment) |
3092 | { | |
3093 | state.comstyle = SYNTAX_FLAGS_COMMENT_STYLE (prev_from_syntax); | |
3094 | state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ? | |
3095 | 1 : -1); | |
3096 | state.comstr_start = prev_from; | |
3097 | } | |
e5d4f4dc | 3098 | |
1fd3172d | 3099 | if (SYNTAX_FLAGS_PREFIX (prev_from_syntax)) |
8489eb67 | 3100 | continue; |
0220c518 | 3101 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
3102 | { |
3103 | case Sescape: | |
3104 | case Scharquote: | |
3105 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 3106 | curlevel->last = prev_from; |
8489eb67 RS |
3107 | startquoted: |
3108 | if (from == end) goto endquoted; | |
93da5fff | 3109 | INC_FROM; |
8489eb67 RS |
3110 | goto symstarted; |
3111 | /* treat following character as a word constituent */ | |
3112 | case Sword: | |
3113 | case Ssymbol: | |
3114 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 3115 | curlevel->last = prev_from; |
8489eb67 RS |
3116 | symstarted: |
3117 | while (from < end) | |
3118 | { | |
7c7ca3d2 | 3119 | /* Some compilers can't handle this inside the switch. */ |
327719ee | 3120 | temp = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
ab229fdd | 3121 | temp = SYNTAX (temp); |
7c7ca3d2 | 3122 | switch (temp) |
8489eb67 RS |
3123 | { |
3124 | case Scharquote: | |
3125 | case Sescape: | |
93da5fff | 3126 | INC_FROM; |
8489eb67 RS |
3127 | if (from == end) goto endquoted; |
3128 | break; | |
3129 | case Sword: | |
3130 | case Ssymbol: | |
3131 | case Squote: | |
3132 | break; | |
3133 | default: | |
3134 | goto symdone; | |
3135 | } | |
93da5fff | 3136 | INC_FROM; |
8489eb67 RS |
3137 | } |
3138 | symdone: | |
3139 | curlevel->prev = curlevel->last; | |
3140 | break; | |
3141 | ||
240c43e8 | 3142 | case Scomment_fence: /* Can't happen because it's handled above. */ |
8489eb67 | 3143 | case Scomment: |
195d1361 | 3144 | if (commentstop || boundary_stop) goto done; |
d355bd8a SM |
3145 | startincomment: |
3146 | /* The (from == BEGV) test was to enter the loop in the middle so | |
95ff8dfc | 3147 | that we find a 2-char comment ender even if we start in the |
e6365855 | 3148 | middle of it. We don't want to do that if we're just at the |
d355bd8a | 3149 | beginning of the comment (think of (*) ... (*)). */ |
95ff8dfc RS |
3150 | found = forw_comment (from, from_byte, end, |
3151 | state.incomment, state.comstyle, | |
e6365855 SM |
3152 | (from == BEGV || from < state.comstr_start + 3) |
3153 | ? 0 : prev_from_syntax, | |
95ff8dfc RS |
3154 | &out_charpos, &out_bytepos, &state.incomment); |
3155 | from = out_charpos; from_byte = out_bytepos; | |
3156 | /* Beware! prev_from and friends are invalid now. | |
3157 | Luckily, the `done' doesn't use them and the INC_FROM | |
3158 | sets them to a sane value without looking at them. */ | |
3159 | if (!found) goto done; | |
d355bd8a | 3160 | INC_FROM; |
8489eb67 | 3161 | state.incomment = 0; |
e5d4f4dc | 3162 | state.comstyle = 0; /* reset the comment style */ |
195d1361 | 3163 | if (boundary_stop) goto done; |
8489eb67 RS |
3164 | break; |
3165 | ||
3166 | case Sopen: | |
3167 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
3168 | depth++; | |
3169 | /* curlevel++->last ran into compiler bug on Apollo */ | |
93da5fff | 3170 | curlevel->last = prev_from; |
8489eb67 | 3171 | if (++curlevel == endlevel) |
02010917 | 3172 | curlevel--; /* error ("Nesting too deep for parser"); */ |
8489eb67 RS |
3173 | curlevel->prev = -1; |
3174 | curlevel->last = -1; | |
30844415 | 3175 | if (targetdepth == depth) goto done; |
8489eb67 RS |
3176 | break; |
3177 | ||
3178 | case Sclose: | |
3179 | depth--; | |
3180 | if (depth < mindepth) | |
3181 | mindepth = depth; | |
3182 | if (curlevel != levelstart) | |
3183 | curlevel--; | |
3184 | curlevel->prev = curlevel->last; | |
30844415 | 3185 | if (targetdepth == depth) goto done; |
8489eb67 RS |
3186 | break; |
3187 | ||
3188 | case Sstring: | |
195d1361 RS |
3189 | case Sstring_fence: |
3190 | state.comstr_start = from - 1; | |
8489eb67 | 3191 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
93da5fff | 3192 | curlevel->last = prev_from; |
7d0393cf | 3193 | state.instring = (code == Sstring |
b7dbcc19 | 3194 | ? (FETCH_CHAR_AS_MULTIBYTE (prev_from_byte)) |
195d1361 RS |
3195 | : ST_STRING_STYLE); |
3196 | if (boundary_stop) goto done; | |
8489eb67 | 3197 | startinstring: |
195d1361 | 3198 | { |
644ea4df | 3199 | nofence = state.instring != ST_STRING_STYLE; |
7d0393cf | 3200 | |
644ea4df RS |
3201 | while (1) |
3202 | { | |
3203 | int c; | |
195d1361 | 3204 | |
644ea4df | 3205 | if (from >= end) goto done; |
b7dbcc19 | 3206 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
7c7ca3d2 RS |
3207 | /* Some compilers can't handle this inside the switch. */ |
3208 | temp = SYNTAX (c); | |
ccf89641 KH |
3209 | |
3210 | /* Check TEMP here so that if the char has | |
3211 | a syntax-table property which says it is NOT | |
3212 | a string character, it does not end the string. */ | |
3213 | if (nofence && c == state.instring && temp == Sstring) | |
3214 | break; | |
3215 | ||
7c7ca3d2 | 3216 | switch (temp) |
644ea4df RS |
3217 | { |
3218 | case Sstring_fence: | |
3219 | if (!nofence) goto string_end; | |
3220 | break; | |
3221 | case Scharquote: | |
3222 | case Sescape: | |
3223 | INC_FROM; | |
3224 | startquotedinstring: | |
3225 | if (from >= end) goto endquoted; | |
195d1361 | 3226 | } |
644ea4df RS |
3227 | INC_FROM; |
3228 | } | |
195d1361 RS |
3229 | } |
3230 | string_end: | |
8489eb67 RS |
3231 | state.instring = -1; |
3232 | curlevel->prev = curlevel->last; | |
93da5fff | 3233 | INC_FROM; |
195d1361 | 3234 | if (boundary_stop) goto done; |
8489eb67 RS |
3235 | break; |
3236 | ||
3237 | case Smath: | |
240c43e8 SM |
3238 | /* FIXME: We should do something with it. */ |
3239 | break; | |
3240 | default: | |
3241 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
8489eb67 RS |
3242 | break; |
3243 | } | |
3244 | } | |
3245 | goto done; | |
3246 | ||
3247 | stop: /* Here if stopping before start of sexp. */ | |
93da5fff | 3248 | from = prev_from; /* We have just fetched the char that starts it; */ |
8489eb67 RS |
3249 | goto done; /* but return the position before it. */ |
3250 | ||
3251 | endquoted: | |
3252 | state.quoted = 1; | |
3253 | done: | |
3254 | state.depth = depth; | |
3255 | state.mindepth = mindepth; | |
3256 | state.thislevelstart = curlevel->prev; | |
3257 | state.prevlevelstart | |
3258 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
3259 | state.location = from; | |
1a102a58 RS |
3260 | state.levelstarts = Qnil; |
3261 | while (--curlevel >= levelstart) | |
3262 | state.levelstarts = Fcons (make_number (curlevel->last), | |
3263 | state.levelstarts); | |
8489eb67 RS |
3264 | immediate_quit = 0; |
3265 | ||
e5d4f4dc | 3266 | *stateptr = state; |
8489eb67 RS |
3267 | } |
3268 | ||
c81a3712 | 3269 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
fdb82f93 PJ |
3270 | doc: /* Parse Lisp syntax starting at FROM until TO; return status of parse at TO. |
3271 | Parsing stops at TO or when certain criteria are met; | |
3272 | point is set to where parsing stops. | |
3273 | If fifth arg OLDSTATE is omitted or nil, | |
3274 | parsing assumes that FROM is the beginning of a function. | |
0e6228bc | 3275 | Value is a list of elements describing final state of parsing: |
fdb82f93 PJ |
3276 | 0. depth in parens. |
3277 | 1. character address of start of innermost containing list; nil if none. | |
3278 | 2. character address of start of last complete sexp terminated. | |
3279 | 3. non-nil if inside a string. | |
3280 | (it is the character that will terminate the string, | |
3281 | or t if the string should be terminated by a generic string delimiter.) | |
7d0393cf | 3282 | 4. nil if outside a comment, t if inside a non-nestable comment, |
fdb82f93 PJ |
3283 | else an integer (the current comment nesting). |
3284 | 5. t if following a quote character. | |
3285 | 6. the minimum paren-depth encountered during this scan. | |
3286 | 7. t if in a comment of style b; symbol `syntax-table' if the comment | |
3287 | should be terminated by a generic comment delimiter. | |
3288 | 8. character address of start of comment or string; nil if not in one. | |
3289 | 9. Intermediate data for continuation of parsing (subject to change). | |
3290 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth | |
3291 | in parentheses becomes equal to TARGETDEPTH. | |
3292 | Fourth arg STOPBEFORE non-nil means stop when come to | |
3293 | any character that starts a sexp. | |
0e6228bc | 3294 | Fifth arg OLDSTATE is a list like what this function returns. |
fdb82f93 | 3295 | It is used to initialize the state of the parse. Elements number 1, 2, 6 |
43726c05 | 3296 | and 8 are ignored. |
fdb82f93 PJ |
3297 | Sixth arg COMMENTSTOP non-nil means stop at the start of a comment. |
3298 | If it is symbol `syntax-table', stop after the start of a comment or a | |
3299 | string, or after end of a comment or a string. */) | |
3300 | (from, to, targetdepth, stopbefore, oldstate, commentstop) | |
c81a3712 | 3301 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; |
8489eb67 RS |
3302 | { |
3303 | struct lisp_parse_state state; | |
3304 | int target; | |
3305 | ||
265a9e55 | 3306 | if (!NILP (targetdepth)) |
8489eb67 | 3307 | { |
b7826503 | 3308 | CHECK_NUMBER (targetdepth); |
8489eb67 RS |
3309 | target = XINT (targetdepth); |
3310 | } | |
3311 | else | |
3312 | target = -100000; /* We won't reach this depth */ | |
3313 | ||
3314 | validate_region (&from, &to); | |
6a140a74 RS |
3315 | scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)), |
3316 | XINT (to), | |
c81a3712 | 3317 | target, !NILP (stopbefore), oldstate, |
7d0393cf | 3318 | (NILP (commentstop) |
195d1361 | 3319 | ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); |
8489eb67 RS |
3320 | |
3321 | SET_PT (state.location); | |
7d0393cf | 3322 | |
8489eb67 RS |
3323 | return Fcons (make_number (state.depth), |
3324 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
3325 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
7d0393cf JB |
3326 | Fcons (state.instring >= 0 |
3327 | ? (state.instring == ST_STRING_STYLE | |
195d1361 | 3328 | ? Qt : make_number (state.instring)) : Qnil, |
95ff8dfc RS |
3329 | Fcons (state.incomment < 0 ? Qt : |
3330 | (state.incomment == 0 ? Qnil : | |
3331 | make_number (state.incomment)), | |
8489eb67 | 3332 | Fcons (state.quoted ? Qt : Qnil, |
bff37d2a | 3333 | Fcons (make_number (state.mindepth), |
7d0393cf | 3334 | Fcons ((state.comstyle |
bff37d2a RS |
3335 | ? (state.comstyle == ST_COMMENT_STYLE |
3336 | ? Qsyntax_table : Qt) : | |
3337 | Qnil), | |
0beaf54f DL |
3338 | Fcons (((state.incomment |
3339 | || (state.instring >= 0)) | |
bff37d2a RS |
3340 | ? make_number (state.comstr_start) |
3341 | : Qnil), | |
1a102a58 | 3342 | Fcons (state.levelstarts, Qnil)))))))))); |
8489eb67 RS |
3343 | } |
3344 | \f | |
dfcf069d | 3345 | void |
8489eb67 RS |
3346 | init_syntax_once () |
3347 | { | |
78f9a1f7 | 3348 | register int i, c; |
8ea151b2 | 3349 | Lisp_Object temp; |
8489eb67 | 3350 | |
5ebaddf5 RS |
3351 | /* This has to be done here, before we call Fmake_char_table. */ |
3352 | Qsyntax_table = intern ("syntax-table"); | |
3353 | staticpro (&Qsyntax_table); | |
3354 | ||
3355 | /* Intern this now in case it isn't already done. | |
3356 | Setting this variable twice is harmless. | |
3357 | But don't staticpro it here--that is done in alloc.c. */ | |
3358 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
3359 | ||
93da5fff | 3360 | /* Create objects which can be shared among syntax tables. */ |
42ebfa31 | 3361 | Vsyntax_code_object = Fmake_vector (make_number (Smax), Qnil); |
93da5fff KH |
3362 | for (i = 0; i < XVECTOR (Vsyntax_code_object)->size; i++) |
3363 | XVECTOR (Vsyntax_code_object)->contents[i] | |
3364 | = Fcons (make_number (i), Qnil); | |
3365 | ||
5ebaddf5 RS |
3366 | /* Now we are ready to set up this property, so we can |
3367 | create syntax tables. */ | |
3368 | Fput (Qsyntax_table, Qchar_table_extra_slots, make_number (0)); | |
3369 | ||
93da5fff | 3370 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; |
8489eb67 | 3371 | |
5ebaddf5 | 3372 | Vstandard_syntax_table = Fmake_char_table (Qsyntax_table, temp); |
8489eb67 | 3373 | |
aa7b08b4 RS |
3374 | /* Control characters should not be whitespace. */ |
3375 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; | |
3376 | for (i = 0; i <= ' ' - 1; i++) | |
3377 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); | |
3378 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 0177, temp); | |
3379 | ||
3380 | /* Except that a few really are whitespace. */ | |
3381 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; | |
3382 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ' ', temp); | |
3383 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\t', temp); | |
3384 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\n', temp); | |
3385 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 015, temp); | |
3386 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 014, temp); | |
3387 | ||
93da5fff | 3388 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; |
8489eb67 | 3389 | for (i = 'a'; i <= 'z'; i++) |
8ea151b2 | 3390 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3391 | for (i = 'A'; i <= 'Z'; i++) |
8ea151b2 | 3392 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3393 | for (i = '0'; i <= '9'; i++) |
8ea151b2 RS |
3394 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
3395 | ||
3396 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '$', temp); | |
3397 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '%', temp); | |
3398 | ||
3399 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '(', | |
3400 | Fcons (make_number (Sopen), make_number (')'))); | |
3401 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ')', | |
3402 | Fcons (make_number (Sclose), make_number ('('))); | |
3403 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '[', | |
3404 | Fcons (make_number (Sopen), make_number (']'))); | |
3405 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ']', | |
3406 | Fcons (make_number (Sclose), make_number ('['))); | |
3407 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '{', | |
3408 | Fcons (make_number (Sopen), make_number ('}'))); | |
3409 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '}', | |
3410 | Fcons (make_number (Sclose), make_number ('{'))); | |
3411 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '"', | |
3412 | Fcons (make_number ((int) Sstring), Qnil)); | |
3413 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\\', | |
3414 | Fcons (make_number ((int) Sescape), Qnil)); | |
3415 | ||
93da5fff | 3416 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Ssymbol]; |
8489eb67 | 3417 | for (i = 0; i < 10; i++) |
78f9a1f7 KH |
3418 | { |
3419 | c = "_-+*/&|<>="[i]; | |
3420 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3421 | } | |
8489eb67 | 3422 | |
93da5fff | 3423 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; |
8489eb67 | 3424 | for (i = 0; i < 12; i++) |
78f9a1f7 KH |
3425 | { |
3426 | c = ".,;:?!#@~^'`"[i]; | |
3427 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3428 | } | |
bd25db08 KH |
3429 | |
3430 | /* All multibyte characters have syntax `word' by default. */ | |
3431 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; | |
5c7b02ab | 3432 | char_table_set_range (Vstandard_syntax_table, 0x80, MAX_CHAR, temp); |
8489eb67 RS |
3433 | } |
3434 | ||
dfcf069d | 3435 | void |
8489eb67 RS |
3436 | syms_of_syntax () |
3437 | { | |
3438 | Qsyntax_table_p = intern ("syntax-table-p"); | |
3439 | staticpro (&Qsyntax_table_p); | |
3440 | ||
93da5fff KH |
3441 | staticpro (&Vsyntax_code_object); |
3442 | ||
a2994c46 KS |
3443 | staticpro (&gl_state.object); |
3444 | staticpro (&gl_state.global_code); | |
3445 | staticpro (&gl_state.current_syntax_table); | |
3446 | staticpro (&gl_state.old_prop); | |
3447 | ||
3448 | /* Defined in regex.c */ | |
3449 | staticpro (&re_match_object); | |
3450 | ||
7bf5e9e4 RS |
3451 | Qscan_error = intern ("scan-error"); |
3452 | staticpro (&Qscan_error); | |
3453 | Fput (Qscan_error, Qerror_conditions, | |
f3be100f | 3454 | Fcons (Qscan_error, Fcons (Qerror, Qnil))); |
7bf5e9e4 RS |
3455 | Fput (Qscan_error, Qerror_message, |
3456 | build_string ("Scan error")); | |
3457 | ||
8489eb67 | 3458 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, |
fdb82f93 | 3459 | doc: /* Non-nil means `forward-sexp', etc., should treat comments as whitespace. */); |
8489eb67 | 3460 | |
195d1361 | 3461 | DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties, |
fdb82f93 PJ |
3462 | doc: /* Non-nil means `forward-sexp', etc., obey `syntax-table' property. |
3463 | Otherwise, that text property is simply ignored. | |
3464 | See the info node `(elisp)Syntax Properties' for a description of the | |
3465 | `syntax-table' property. */); | |
195d1361 | 3466 | |
8489eb67 RS |
3467 | words_include_escapes = 0; |
3468 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
fdb82f93 | 3469 | doc: /* Non-nil means `forward-word', etc., should treat escape chars part of words. */); |
8489eb67 | 3470 | |
bd25db08 | 3471 | DEFVAR_BOOL ("multibyte-syntax-as-symbol", &multibyte_syntax_as_symbol, |
fdb82f93 | 3472 | doc: /* Non-nil means `scan-sexps' treats all multibyte characters as symbol. */); |
bd25db08 KH |
3473 | multibyte_syntax_as_symbol = 0; |
3474 | ||
f4ed767f GM |
3475 | DEFVAR_BOOL ("open-paren-in-column-0-is-defun-start", |
3476 | &open_paren_in_column_0_is_defun_start, | |
b222e415 | 3477 | doc: /* *Non-nil means an open paren in column 0 denotes the start of a defun. */); |
f4ed767f GM |
3478 | open_paren_in_column_0_is_defun_start = 1; |
3479 | ||
8f924df7 KH |
3480 | |
3481 | DEFVAR_LISP ("find-word-boundary-function-table", | |
3482 | &Vfind_word_boundary_function_table, | |
869bb237 | 3483 | doc: /* |
8f924df7 | 3484 | Char table of functions to search for the word boundary. |
869bb237 KH |
3485 | Each function is called with two arguments; POS and LIMIT. |
3486 | POS and LIMIT are character positions in the current buffer. | |
3487 | ||
3488 | If POS is less than LIMIT, POS is at the first character of a word, | |
3489 | and the return value of a function is a position after the last | |
3490 | character of that word. | |
3491 | ||
3492 | If POS is not less than LIMIT, POS is at the last character of a word, | |
3493 | and the return value of a function is a position at the first | |
3494 | character of that word. | |
3495 | ||
3496 | In both cases, LIMIT bounds the search. */); | |
8f924df7 | 3497 | Vfind_word_boundary_function_table = Fmake_char_table (Qnil, Qnil); |
869bb237 | 3498 | |
8489eb67 RS |
3499 | defsubr (&Ssyntax_table_p); |
3500 | defsubr (&Ssyntax_table); | |
3501 | defsubr (&Sstandard_syntax_table); | |
3502 | defsubr (&Scopy_syntax_table); | |
3503 | defsubr (&Sset_syntax_table); | |
3504 | defsubr (&Schar_syntax); | |
beefa22e | 3505 | defsubr (&Smatching_paren); |
c65adb44 | 3506 | defsubr (&Sstring_to_syntax); |
8489eb67 | 3507 | defsubr (&Smodify_syntax_entry); |
62abe9cb | 3508 | defsubr (&Sinternal_describe_syntax_value); |
8489eb67 RS |
3509 | |
3510 | defsubr (&Sforward_word); | |
3511 | ||
195d1361 RS |
3512 | defsubr (&Sskip_chars_forward); |
3513 | defsubr (&Sskip_chars_backward); | |
3514 | defsubr (&Sskip_syntax_forward); | |
3515 | defsubr (&Sskip_syntax_backward); | |
3516 | ||
b3cfe0c8 | 3517 | defsubr (&Sforward_comment); |
8489eb67 RS |
3518 | defsubr (&Sscan_lists); |
3519 | defsubr (&Sscan_sexps); | |
3520 | defsubr (&Sbackward_prefix_chars); | |
3521 | defsubr (&Sparse_partial_sexp); | |
3522 | } | |
839966f3 KH |
3523 | |
3524 | /* arch-tag: 3e297b9f-088e-4b64-8f4c-fb0b3443e412 | |
3525 | (do not change this comment) */ |