Commit | Line | Data |
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8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
429ab54e | 2 | Copyright (C) 1985, 1987, 1993, 1994, 1995, 1997, 1998, 1999, 2001, |
114f9c96 | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
429ab54e | 4 | Free Software Foundation, Inc. |
8489eb67 RS |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
8489eb67 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
8489eb67 RS |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
8489eb67 RS |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
8489eb67 | 23 | #include <ctype.h> |
d7306fe6 | 24 | #include <setjmp.h> |
8489eb67 RS |
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 | { | |
6449674e SM |
69 | int depth; /* Depth at end of parsing. */ |
70 | int instring; /* -1 if not within string, else desired terminator. */ | |
71 | int incomment; /* -1 if in unnestable comment else comment nesting */ | |
72 | int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */ | |
73 | int quoted; /* Nonzero if just after an escape char at end of parsing */ | |
74 | int mindepth; /* Minimum depth seen while scanning. */ | |
75 | /* Char number of most recent start-of-expression at current level */ | |
76 | EMACS_INT thislevelstart; | |
77 | /* Char number of start of containing expression */ | |
78 | EMACS_INT prevlevelstart; | |
79 | EMACS_INT location; /* Char number at which parsing stopped. */ | |
80 | EMACS_INT comstr_start; /* Position of last comment/string starter. */ | |
81 | Lisp_Object levelstarts; /* Char numbers of starts-of-expression | |
82 | of levels (starting from outermost). */ | |
e5d4f4dc RS |
83 | }; |
84 | \f | |
37bef230 RS |
85 | /* These variables are a cache for finding the start of a defun. |
86 | find_start_pos is the place for which the defun start was found. | |
87 | find_start_value is the defun start position found for it. | |
6a140a74 | 88 | find_start_value_byte is the corresponding byte position. |
37bef230 RS |
89 | find_start_buffer is the buffer it was found in. |
90 | find_start_begv is the BEGV value when it was found. | |
91 | find_start_modiff is the value of MODIFF when it was found. */ | |
92 | ||
8e2911c2 AS |
93 | static EMACS_INT find_start_pos; |
94 | static EMACS_INT find_start_value; | |
95 | static EMACS_INT find_start_value_byte; | |
37bef230 | 96 | static struct buffer *find_start_buffer; |
8e2911c2 | 97 | static EMACS_INT find_start_begv; |
37bef230 | 98 | static int find_start_modiff; |
6a140a74 RS |
99 | |
100 | ||
f57e2426 J |
101 | static Lisp_Object skip_chars (int, Lisp_Object, Lisp_Object, int); |
102 | static Lisp_Object skip_syntaxes (int, Lisp_Object, Lisp_Object); | |
103 | static Lisp_Object scan_lists (EMACS_INT, EMACS_INT, EMACS_INT, int); | |
104 | static void scan_sexps_forward (struct lisp_parse_state *, | |
105 | EMACS_INT, EMACS_INT, EMACS_INT, int, | |
106 | int, Lisp_Object, int); | |
107 | static int in_classes (int, Lisp_Object); | |
195d1361 RS |
108 | \f |
109 | ||
110 | struct gl_state_s gl_state; /* Global state of syntax parser. */ | |
111 | ||
971de7fb | 112 | INTERVAL interval_of (int, Lisp_Object); |
195d1361 RS |
113 | #define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals |
114 | to scan to property-change. */ | |
115 | ||
6a140a74 RS |
116 | /* Update gl_state to an appropriate interval which contains CHARPOS. The |
117 | sign of COUNT give the relative position of CHARPOS wrt the previously | |
195d1361 | 118 | valid interval. If INIT, only [be]_property fields of gl_state are |
6a140a74 | 119 | valid at start, the rest is filled basing on OBJECT. |
195d1361 | 120 | |
6a140a74 | 121 | `gl_state.*_i' are the intervals, and CHARPOS is further in the search |
195d1361 RS |
122 | direction than the intervals - or in an interval. We update the |
123 | current syntax-table basing on the property of this interval, and | |
6a140a74 | 124 | update the interval to start further than CHARPOS - or be |
195d1361 | 125 | NULL_INTERVAL. We also update lim_property to be the next value of |
6a140a74 | 126 | charpos to call this subroutine again - or be before/after the |
195d1361 RS |
127 | start/end of OBJECT. */ |
128 | ||
129 | void | |
971de7fb | 130 | update_syntax_table (int charpos, int count, int init, Lisp_Object object) |
195d1361 RS |
131 | { |
132 | Lisp_Object tmp_table; | |
4ffe723b | 133 | int cnt = 0, invalidate = 1; |
5a774522 | 134 | INTERVAL i; |
195d1361 RS |
135 | |
136 | if (init) | |
137 | { | |
bb0de084 | 138 | gl_state.old_prop = Qnil; |
195d1361 RS |
139 | gl_state.start = gl_state.b_property; |
140 | gl_state.stop = gl_state.e_property; | |
bb0de084 SM |
141 | i = interval_of (charpos, object); |
142 | gl_state.backward_i = gl_state.forward_i = i; | |
195d1361 RS |
143 | invalidate = 0; |
144 | if (NULL_INTERVAL_P (i)) | |
145 | return; | |
f902a008 | 146 | /* interval_of updates only ->position of the return value, so |
d80f4cc7 | 147 | update the parents manually to speed up update_interval. */ |
bb0de084 | 148 | while (!NULL_PARENT (i)) |
d80f4cc7 RS |
149 | { |
150 | if (AM_RIGHT_CHILD (i)) | |
439d5cb4 | 151 | INTERVAL_PARENT (i)->position = i->position |
d80f4cc7 | 152 | - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */ |
439d5cb4 KR |
153 | - TOTAL_LENGTH (INTERVAL_PARENT (i)) |
154 | + LEFT_TOTAL_LENGTH (INTERVAL_PARENT (i)); | |
d80f4cc7 | 155 | else |
439d5cb4 | 156 | INTERVAL_PARENT (i)->position = i->position - LEFT_TOTAL_LENGTH (i) |
d80f4cc7 | 157 | + TOTAL_LENGTH (i); |
439d5cb4 | 158 | i = INTERVAL_PARENT (i); |
d80f4cc7 RS |
159 | } |
160 | i = gl_state.forward_i; | |
bb0de084 | 161 | gl_state.b_property = i->position - gl_state.offset; |
ee0cdb48 | 162 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
163 | goto update; |
164 | } | |
5a774522 | 165 | i = count > 0 ? gl_state.forward_i : gl_state.backward_i; |
195d1361 | 166 | |
423e705d | 167 | /* We are guaranteed to be called with CHARPOS either in i, |
6a140a74 | 168 | or further off. */ |
195d1361 RS |
169 | if (NULL_INTERVAL_P (i)) |
170 | error ("Error in syntax_table logic for to-the-end intervals"); | |
6a140a74 | 171 | else if (charpos < i->position) /* Move left. */ |
195d1361 RS |
172 | { |
173 | if (count > 0) | |
f902a008 | 174 | error ("Error in syntax_table logic for intervals <-"); |
195d1361 | 175 | /* Update the interval. */ |
6a140a74 | 176 | i = update_interval (i, charpos); |
bb0de084 | 177 | if (INTERVAL_LAST_POS (i) != gl_state.b_property) |
195d1361 RS |
178 | { |
179 | invalidate = 0; | |
195d1361 | 180 | gl_state.forward_i = i; |
ee0cdb48 | 181 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 | 182 | } |
423e705d | 183 | } |
6a140a74 | 184 | else if (charpos >= INTERVAL_LAST_POS (i)) /* Move right. */ |
195d1361 RS |
185 | { |
186 | if (count < 0) | |
f902a008 | 187 | error ("Error in syntax_table logic for intervals ->"); |
195d1361 | 188 | /* Update the interval. */ |
6a140a74 | 189 | i = update_interval (i, charpos); |
bb0de084 | 190 | if (i->position != gl_state.e_property) |
195d1361 RS |
191 | { |
192 | invalidate = 0; | |
195d1361 | 193 | gl_state.backward_i = i; |
bb0de084 | 194 | gl_state.b_property = i->position - gl_state.offset; |
195d1361 RS |
195 | } |
196 | } | |
195d1361 RS |
197 | |
198 | update: | |
199 | tmp_table = textget (i->plist, Qsyntax_table); | |
200 | ||
201 | if (invalidate) | |
202 | invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */ | |
7d0393cf | 203 | |
423e705d SM |
204 | if (invalidate) /* Did not get to adjacent interval. */ |
205 | { /* with the same table => */ | |
206 | /* invalidate the old range. */ | |
195d1361 RS |
207 | if (count > 0) |
208 | { | |
209 | gl_state.backward_i = i; | |
bb0de084 SM |
210 | gl_state.b_property = i->position - gl_state.offset; |
211 | } | |
212 | else | |
195d1361 | 213 | { |
bb0de084 | 214 | gl_state.forward_i = i; |
ee0cdb48 | 215 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
216 | } |
217 | } | |
37bef230 | 218 | |
bb0de084 | 219 | if (!EQ (tmp_table, gl_state.old_prop)) |
195d1361 | 220 | { |
bb0de084 SM |
221 | gl_state.current_syntax_table = tmp_table; |
222 | gl_state.old_prop = tmp_table; | |
223 | if (EQ (Fsyntax_table_p (tmp_table), Qt)) | |
224 | { | |
225 | gl_state.use_global = 0; | |
7d0393cf | 226 | } |
bb0de084 SM |
227 | else if (CONSP (tmp_table)) |
228 | { | |
229 | gl_state.use_global = 1; | |
230 | gl_state.global_code = tmp_table; | |
231 | } | |
7d0393cf | 232 | else |
bb0de084 SM |
233 | { |
234 | gl_state.use_global = 0; | |
235 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
236 | } | |
195d1361 RS |
237 | } |
238 | ||
239 | while (!NULL_INTERVAL_P (i)) | |
240 | { | |
241 | if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table))) | |
242 | { | |
243 | if (count > 0) | |
bb0de084 SM |
244 | { |
245 | gl_state.e_property = i->position - gl_state.offset; | |
246 | gl_state.forward_i = i; | |
247 | } | |
248 | else | |
249 | { | |
5a774522 SM |
250 | gl_state.b_property |
251 | = i->position + LENGTH (i) - gl_state.offset; | |
bb0de084 SM |
252 | gl_state.backward_i = i; |
253 | } | |
254 | return; | |
195d1361 | 255 | } |
7d0393cf | 256 | else if (cnt == INTERVALS_AT_ONCE) |
195d1361 RS |
257 | { |
258 | if (count > 0) | |
bb0de084 | 259 | { |
5a774522 SM |
260 | gl_state.e_property |
261 | = i->position + LENGTH (i) - gl_state.offset | |
262 | /* e_property at EOB is not set to ZV but to ZV+1, so that | |
263 | we can do INC(from);UPDATE_SYNTAX_TABLE_FORWARD without | |
264 | having to check eob between the two. */ | |
265 | + (NULL_INTERVAL_P (next_interval (i)) ? 1 : 0); | |
bb0de084 SM |
266 | gl_state.forward_i = i; |
267 | } | |
268 | else | |
269 | { | |
270 | gl_state.b_property = i->position - gl_state.offset; | |
271 | gl_state.backward_i = i; | |
272 | } | |
273 | return; | |
195d1361 RS |
274 | } |
275 | cnt++; | |
276 | i = count > 0 ? next_interval (i) : previous_interval (i); | |
277 | } | |
bb0de084 SM |
278 | eassert (NULL_INTERVAL_P (i)); /* This property goes to the end. */ |
279 | if (count > 0) | |
280 | gl_state.e_property = gl_state.stop; | |
281 | else | |
282 | gl_state.b_property = gl_state.start; | |
195d1361 RS |
283 | } |
284 | \f | |
6a140a74 RS |
285 | /* Returns TRUE if char at CHARPOS is quoted. |
286 | Global syntax-table data should be set up already to be good at CHARPOS | |
287 | or after. On return global syntax data is good for lookup at CHARPOS. */ | |
195d1361 RS |
288 | |
289 | static int | |
6449674e | 290 | char_quoted (EMACS_INT charpos, EMACS_INT bytepos) |
195d1361 RS |
291 | { |
292 | register enum syntaxcode code; | |
6449674e | 293 | register EMACS_INT beg = BEGV; |
195d1361 | 294 | register int quoted = 0; |
6449674e | 295 | EMACS_INT orig = charpos; |
6a140a74 | 296 | |
02d8b017 | 297 | while (charpos > beg) |
195d1361 | 298 | { |
ab229fdd | 299 | int c; |
02d8b017 | 300 | DEC_BOTH (charpos, bytepos); |
ab229fdd | 301 | |
6a140a74 | 302 | UPDATE_SYNTAX_TABLE_BACKWARD (charpos); |
327719ee | 303 | c = FETCH_CHAR_AS_MULTIBYTE (bytepos); |
ab229fdd | 304 | code = SYNTAX (c); |
6a140a74 RS |
305 | if (! (code == Scharquote || code == Sescape)) |
306 | break; | |
307 | ||
6a140a74 | 308 | quoted = !quoted; |
195d1361 | 309 | } |
6a140a74 RS |
310 | |
311 | UPDATE_SYNTAX_TABLE (orig); | |
195d1361 RS |
312 | return quoted; |
313 | } | |
6a140a74 RS |
314 | |
315 | /* Return the bytepos one character after BYTEPOS. | |
316 | We assume that BYTEPOS is not at the end of the buffer. */ | |
317 | ||
6449674e | 318 | INLINE EMACS_INT |
971de7fb | 319 | inc_bytepos (EMACS_INT bytepos) |
6a140a74 | 320 | { |
ef316cf0 RS |
321 | if (NILP (current_buffer->enable_multibyte_characters)) |
322 | return bytepos + 1; | |
323 | ||
6a140a74 RS |
324 | INC_POS (bytepos); |
325 | return bytepos; | |
326 | } | |
327 | ||
328 | /* Return the bytepos one character before BYTEPOS. | |
329 | We assume that BYTEPOS is not at the start of the buffer. */ | |
330 | ||
6449674e | 331 | INLINE EMACS_INT |
971de7fb | 332 | dec_bytepos (EMACS_INT bytepos) |
6a140a74 | 333 | { |
ef316cf0 RS |
334 | if (NILP (current_buffer->enable_multibyte_characters)) |
335 | return bytepos - 1; | |
336 | ||
6a140a74 RS |
337 | DEC_POS (bytepos); |
338 | return bytepos; | |
339 | } | |
195d1361 | 340 | \f |
2b34df4e | 341 | /* Return a defun-start position before POS and not too far before. |
7cc80f0a RS |
342 | It should be the last one before POS, or nearly the last. |
343 | ||
344 | When open_paren_in_column_0_is_defun_start is nonzero, | |
1fd1cc2f | 345 | only the beginning of the buffer is treated as a defun-start. |
7cc80f0a RS |
346 | |
347 | We record the information about where the scan started | |
348 | and what its result was, so that another call in the same area | |
349 | can return the same value very quickly. | |
195d1361 RS |
350 | |
351 | There is no promise at which position the global syntax data is | |
352 | valid on return from the subroutine, so the caller should explicitly | |
353 | update the global data. */ | |
37bef230 | 354 | |
6449674e | 355 | static EMACS_INT |
971de7fb | 356 | find_defun_start (EMACS_INT pos, EMACS_INT pos_byte) |
37bef230 | 357 | { |
8e2911c2 | 358 | EMACS_INT opoint = PT, opoint_byte = PT_BYTE; |
37bef230 | 359 | |
1fd1cc2f RS |
360 | if (!open_paren_in_column_0_is_defun_start) |
361 | { | |
362 | find_start_value_byte = BEGV_BYTE; | |
363 | return BEGV; | |
364 | } | |
365 | ||
37bef230 RS |
366 | /* Use previous finding, if it's valid and applies to this inquiry. */ |
367 | if (current_buffer == find_start_buffer | |
368 | /* Reuse the defun-start even if POS is a little farther on. | |
369 | POS might be in the next defun, but that's ok. | |
370 | Our value may not be the best possible, but will still be usable. */ | |
371 | && pos <= find_start_pos + 1000 | |
372 | && pos >= find_start_value | |
373 | && BEGV == find_start_begv | |
374 | && MODIFF == find_start_modiff) | |
375 | return find_start_value; | |
376 | ||
377 | /* Back up to start of line. */ | |
6a140a74 | 378 | scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1); |
37bef230 | 379 | |
195d1361 RS |
380 | /* We optimize syntax-table lookup for rare updates. Thus we accept |
381 | only those `^\s(' which are good in global _and_ text-property | |
382 | syntax-tables. */ | |
d48cd3f4 | 383 | SETUP_BUFFER_SYNTAX_TABLE (); |
1fd1cc2f | 384 | while (PT > BEGV) |
37bef230 | 385 | { |
ab229fdd AS |
386 | int c; |
387 | ||
1fd1cc2f RS |
388 | /* Open-paren at start of line means we may have found our |
389 | defun-start. */ | |
327719ee | 390 | c = FETCH_CHAR_AS_MULTIBYTE (PT_BYTE); |
ab229fdd | 391 | if (SYNTAX (c) == Sopen) |
195d1361 | 392 | { |
1fd1cc2f | 393 | SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */ |
327719ee | 394 | c = FETCH_CHAR_AS_MULTIBYTE (PT_BYTE); |
ab229fdd | 395 | if (SYNTAX (c) == Sopen) |
1fd1cc2f RS |
396 | break; |
397 | /* Now fallback to the default value. */ | |
d48cd3f4 | 398 | SETUP_BUFFER_SYNTAX_TABLE (); |
195d1361 | 399 | } |
1fd1cc2f RS |
400 | /* Move to beg of previous line. */ |
401 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1); | |
37bef230 RS |
402 | } |
403 | ||
404 | /* Record what we found, for the next try. */ | |
6a140a74 RS |
405 | find_start_value = PT; |
406 | find_start_value_byte = PT_BYTE; | |
37bef230 RS |
407 | find_start_buffer = current_buffer; |
408 | find_start_modiff = MODIFF; | |
409 | find_start_begv = BEGV; | |
410 | find_start_pos = pos; | |
411 | ||
6a140a74 RS |
412 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
413 | ||
37bef230 RS |
414 | return find_start_value; |
415 | } | |
416 | \f | |
f902a008 RS |
417 | /* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */ |
418 | ||
419 | static int | |
971de7fb | 420 | prev_char_comend_first (int pos, int pos_byte) |
f902a008 RS |
421 | { |
422 | int c, val; | |
423 | ||
424 | DEC_BOTH (pos, pos_byte); | |
425 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
426 | c = FETCH_CHAR (pos_byte); | |
427 | val = SYNTAX_COMEND_FIRST (c); | |
428 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
429 | return val; | |
430 | } | |
431 | ||
432 | /* Return the SYNTAX_COMSTART_FIRST of the character before POS, POS_BYTE. */ | |
433 | ||
3f679f55 SM |
434 | /* static int |
435 | * prev_char_comstart_first (pos, pos_byte) | |
436 | * int pos, pos_byte; | |
437 | * { | |
438 | * int c, val; | |
7d0393cf | 439 | * |
3f679f55 SM |
440 | * DEC_BOTH (pos, pos_byte); |
441 | * UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
442 | * c = FETCH_CHAR (pos_byte); | |
443 | * val = SYNTAX_COMSTART_FIRST (c); | |
444 | * UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
445 | * return val; | |
446 | * } */ | |
f902a008 | 447 | |
6a140a74 RS |
448 | /* Checks whether charpos FROM is at the end of a comment. |
449 | FROM_BYTE is the bytepos corresponding to FROM. | |
450 | Do not move back before STOP. | |
451 | ||
452 | Return a positive value if we find a comment ending at FROM/FROM_BYTE; | |
453 | return -1 otherwise. | |
454 | ||
455 | If successful, store the charpos of the comment's beginning | |
456 | into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR. | |
527a32d9 KH |
457 | |
458 | Global syntax data remains valid for backward search starting at | |
459 | the returned value (or at FROM, if the search was not successful). */ | |
195d1361 RS |
460 | |
461 | static int | |
971de7fb | 462 | back_comment (EMACS_INT from, EMACS_INT from_byte, EMACS_INT stop, int comnested, int comstyle, EMACS_INT *charpos_ptr, EMACS_INT *bytepos_ptr) |
195d1361 RS |
463 | { |
464 | /* Look back, counting the parity of string-quotes, | |
465 | and recording the comment-starters seen. | |
466 | When we reach a safe place, assume that's not in a string; | |
467 | then step the main scan to the earliest comment-starter seen | |
468 | an even number of string quotes away from the safe place. | |
469 | ||
470 | OFROM[I] is position of the earliest comment-starter seen | |
471 | which is I+2X quotes from the comment-end. | |
472 | PARITY is current parity of quotes from the comment end. */ | |
3ee5041c | 473 | int string_style = -1; /* Presumed outside of any string. */ |
195d1361 | 474 | int string_lossage = 0; |
f7c436c1 | 475 | /* Not a real lossage: indicates that we have passed a matching comment |
7d0393cf | 476 | starter plus a non-matching comment-ender, meaning that any matching |
f7c436c1 SM |
477 | comment-starter we might see later could be a false positive (hidden |
478 | inside another comment). | |
479 | Test case: { a (* b } c (* d *) */ | |
480 | int comment_lossage = 0; | |
8e2911c2 AS |
481 | EMACS_INT comment_end = from; |
482 | EMACS_INT comment_end_byte = from_byte; | |
483 | EMACS_INT comstart_pos = 0; | |
484 | EMACS_INT comstart_byte; | |
eb35b628 RS |
485 | /* Place where the containing defun starts, |
486 | or 0 if we didn't come across it yet. */ | |
8e2911c2 AS |
487 | EMACS_INT defun_start = 0; |
488 | EMACS_INT defun_start_byte = 0; | |
195d1361 | 489 | register enum syntaxcode code; |
95ff8dfc | 490 | int nesting = 1; /* current comment nesting */ |
ea315ed6 | 491 | int c; |
3f679f55 SM |
492 | int syntax = 0; |
493 | ||
494 | /* FIXME: A }} comment-ender style leads to incorrect behavior | |
495 | in the case of {{ c }}} because we ignore the last two chars which are | |
496 | assumed to be comment-enders although they aren't. */ | |
195d1361 RS |
497 | |
498 | /* At beginning of range to scan, we're outside of strings; | |
499 | that determines quote parity to the comment-end. */ | |
500 | while (from != stop) | |
501 | { | |
3f679f55 SM |
502 | int temp_byte, prev_syntax; |
503 | int com2start, com2end; | |
6a140a74 | 504 | |
195d1361 | 505 | /* Move back and examine a character. */ |
6a140a74 | 506 | DEC_BOTH (from, from_byte); |
195d1361 RS |
507 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
508 | ||
3f679f55 | 509 | prev_syntax = syntax; |
b7dbcc19 | 510 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
3f679f55 | 511 | syntax = SYNTAX_WITH_FLAGS (c); |
195d1361 RS |
512 | code = SYNTAX (c); |
513 | ||
3f679f55 SM |
514 | /* Check for 2-char comment markers. */ |
515 | com2start = (SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
516 | && SYNTAX_FLAGS_COMSTART_SECOND (prev_syntax) | |
517 | && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (prev_syntax) | |
518 | && (SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax) | |
519 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested); | |
520 | com2end = (SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
521 | && SYNTAX_FLAGS_COMEND_SECOND (prev_syntax)); | |
522 | ||
523 | /* Nasty cases with overlapping 2-char comment markers: | |
524 | - snmp-mode: -- c -- foo -- c -- | |
525 | --- c -- | |
526 | ------ c -- | |
527 | - c-mode: *||* | |
528 | |* *|* *| | |
529 | |*| |* |*| | |
530 | /// */ | |
531 | ||
532 | /* If a 2-char comment sequence partly overlaps with another, | |
533 | we don't try to be clever. */ | |
534 | if (from > stop && (com2end || com2start)) | |
195d1361 | 535 | { |
3f679f55 SM |
536 | int next = from, next_byte = from_byte, next_c, next_syntax; |
537 | DEC_BOTH (next, next_byte); | |
538 | UPDATE_SYNTAX_TABLE_BACKWARD (next); | |
b7dbcc19 | 539 | next_c = FETCH_CHAR_AS_MULTIBYTE (next_byte); |
3f679f55 SM |
540 | next_syntax = SYNTAX_WITH_FLAGS (next_c); |
541 | if (((com2start || comnested) | |
542 | && SYNTAX_FLAGS_COMEND_SECOND (syntax) | |
543 | && SYNTAX_FLAGS_COMEND_FIRST (next_syntax)) | |
544 | || ((com2end || comnested) | |
545 | && SYNTAX_FLAGS_COMSTART_SECOND (syntax) | |
546 | && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (syntax) | |
547 | && SYNTAX_FLAGS_COMSTART_FIRST (next_syntax))) | |
548 | goto lossage; | |
549 | /* UPDATE_SYNTAX_TABLE_FORWARD (next + 1); */ | |
f902a008 | 550 | } |
3f679f55 SM |
551 | |
552 | if (com2start && comstart_pos == 0) | |
553 | /* We're looking at a comment starter. But it might be a comment | |
554 | ender as well (see snmp-mode). The first time we see one, we | |
555 | need to consider it as a comment starter, | |
556 | and the subsequent times as a comment ender. */ | |
557 | com2end = 0; | |
558 | ||
559 | /* Turn a 2-char comment sequences into the appropriate syntax. */ | |
560 | if (com2end) | |
561 | code = Sendcomment; | |
562 | else if (com2start) | |
563 | code = Scomment; | |
564 | /* Ignore comment starters of a different style. */ | |
565 | else if (code == Scomment | |
566 | && (comstyle != SYNTAX_FLAGS_COMMENT_STYLE (syntax) | |
567 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax) != comnested)) | |
1aa963c8 | 568 | continue; |
195d1361 | 569 | |
9828a477 KH |
570 | /* Ignore escaped characters, except comment-enders. */ |
571 | if (code != Sendcomment && char_quoted (from, from_byte)) | |
195d1361 RS |
572 | continue; |
573 | ||
3ee5041c | 574 | switch (code) |
195d1361 | 575 | { |
3ee5041c SM |
576 | case Sstring_fence: |
577 | case Scomment_fence: | |
578 | c = (code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE); | |
579 | case Sstring: | |
580 | /* Track parity of quotes. */ | |
581 | if (string_style == -1) | |
582 | /* Entering a string. */ | |
583 | string_style = c; | |
584 | else if (string_style == c) | |
585 | /* Leaving the string. */ | |
586 | string_style = -1; | |
587 | else | |
588 | /* If we have two kinds of string delimiters. | |
589 | There's no way to grok this scanning backwards. */ | |
195d1361 | 590 | string_lossage = 1; |
3ee5041c | 591 | break; |
7d0393cf | 592 | |
3ee5041c SM |
593 | case Scomment: |
594 | /* We've already checked that it is the relevant comstyle. */ | |
f7c436c1 | 595 | if (string_style != -1 || comment_lossage || string_lossage) |
3ee5041c SM |
596 | /* There are odd string quotes involved, so let's be careful. |
597 | Test case in Pascal: " { " a { " } */ | |
598 | goto lossage; | |
599 | ||
f7c436c1 SM |
600 | if (!comnested) |
601 | { | |
602 | /* Record best comment-starter so far. */ | |
603 | comstart_pos = from; | |
604 | comstart_byte = from_byte; | |
605 | } | |
606 | else if (--nesting <= 0) | |
95ff8dfc RS |
607 | /* nested comments have to be balanced, so we don't need to |
608 | keep looking for earlier ones. We use here the same (slightly | |
609 | incorrect) reasoning as below: since it is followed by uniform | |
610 | paired string quotes, this comment-start has to be outside of | |
611 | strings, else the comment-end itself would be inside a string. */ | |
612 | goto done; | |
3ee5041c SM |
613 | break; |
614 | ||
02010917 | 615 | case Sendcomment: |
3f679f55 | 616 | if (SYNTAX_FLAGS_COMMENT_STYLE (syntax) == comstyle |
d070eb22 | 617 | && ((com2end && SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax)) |
3f679f55 | 618 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested) |
02010917 SM |
619 | /* This is the same style of comment ender as ours. */ |
620 | { | |
621 | if (comnested) | |
622 | nesting++; | |
623 | else | |
624 | /* Anything before that can't count because it would match | |
625 | this comment-ender rather than ours. */ | |
626 | from = stop; /* Break out of the loop. */ | |
627 | } | |
f7c436c1 SM |
628 | else if (comstart_pos != 0 || c != '\n') |
629 | /* We're mixing comment styles here, so we'd better be careful. | |
630 | The (comstart_pos != 0 || c != '\n') check is not quite correct | |
631 | (we should just always set comment_lossage), but removing it | |
632 | would imply that any multiline comment in C would go through | |
633 | lossage, which seems overkill. | |
634 | The failure should only happen in the rare cases such as | |
635 | { (* } *) */ | |
636 | comment_lossage = 1; | |
02010917 | 637 | break; |
195d1361 | 638 | |
02010917 SM |
639 | case Sopen: |
640 | /* Assume a defun-start point is outside of strings. */ | |
641 | if (open_paren_in_column_0_is_defun_start | |
642 | && (from == stop | |
643 | || (temp_byte = dec_bytepos (from_byte), | |
644 | FETCH_CHAR (temp_byte) == '\n'))) | |
645 | { | |
646 | defun_start = from; | |
647 | defun_start_byte = from_byte; | |
648 | from = stop; /* Break out of the loop. */ | |
649 | } | |
eb35b628 | 650 | break; |
02010917 SM |
651 | |
652 | default: | |
f7c436c1 | 653 | break; |
eb35b628 | 654 | } |
195d1361 RS |
655 | } |
656 | ||
657 | if (comstart_pos == 0) | |
658 | { | |
659 | from = comment_end; | |
6a140a74 | 660 | from_byte = comment_end_byte; |
195d1361 RS |
661 | UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1); |
662 | } | |
f7c436c1 SM |
663 | /* If comstart_pos is set and we get here (ie. didn't jump to `lossage' |
664 | or `done'), then we've found the beginning of the non-nested comment. */ | |
665 | else if (1) /* !comnested */ | |
195d1361 RS |
666 | { |
667 | from = comstart_pos; | |
6a140a74 | 668 | from_byte = comstart_byte; |
789f3320 | 669 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
195d1361 RS |
670 | } |
671 | else | |
672 | { | |
3ee5041c SM |
673 | struct lisp_parse_state state; |
674 | lossage: | |
195d1361 RS |
675 | /* We had two kinds of string delimiters mixed up |
676 | together. Decode this going forwards. | |
02010917 | 677 | Scan fwd from a known safe place (beginning-of-defun) |
195d1361 RS |
678 | to the one in question; this records where we |
679 | last passed a comment starter. */ | |
eb35b628 RS |
680 | /* If we did not already find the defun start, find it now. */ |
681 | if (defun_start == 0) | |
682 | { | |
683 | defun_start = find_defun_start (comment_end, comment_end_byte); | |
684 | defun_start_byte = find_start_value_byte; | |
685 | } | |
02010917 | 686 | do |
195d1361 | 687 | { |
02010917 SM |
688 | scan_sexps_forward (&state, |
689 | defun_start, defun_start_byte, | |
690 | comment_end, -10000, 0, Qnil, 0); | |
691 | defun_start = comment_end; | |
692 | if (state.incomment == (comnested ? 1 : -1) | |
693 | && state.comstyle == comstyle) | |
694 | from = state.comstr_start; | |
695 | else | |
696 | { | |
697 | from = comment_end; | |
698 | if (state.incomment) | |
699 | /* If comment_end is inside some other comment, maybe ours | |
700 | is nested, so we need to try again from within the | |
701 | surrounding comment. Example: { a (* " *) */ | |
702 | { | |
703 | /* FIXME: We should advance by one or two chars. */ | |
704 | defun_start = state.comstr_start + 2; | |
705 | defun_start_byte = CHAR_TO_BYTE (defun_start); | |
706 | } | |
707 | } | |
708 | } while (defun_start < comment_end); | |
709 | ||
6a140a74 | 710 | from_byte = CHAR_TO_BYTE (from); |
195d1361 RS |
711 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
712 | } | |
7d0393cf | 713 | |
95ff8dfc | 714 | done: |
6a140a74 RS |
715 | *charpos_ptr = from; |
716 | *bytepos_ptr = from_byte; | |
717 | ||
1aa963c8 | 718 | return (from == comment_end) ? -1 : from; |
195d1361 RS |
719 | } |
720 | \f | |
8489eb67 | 721 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
fdb82f93 PJ |
722 | doc: /* Return t if OBJECT is a syntax table. |
723 | Currently, any char-table counts as a syntax table. */) | |
5842a27b | 724 | (Lisp_Object object) |
8489eb67 | 725 | { |
2203e1e8 | 726 | if (CHAR_TABLE_P (object) |
e704cb4b | 727 | && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table)) |
8489eb67 RS |
728 | return Qt; |
729 | return Qnil; | |
730 | } | |
731 | ||
8ea151b2 | 732 | static void |
971de7fb | 733 | check_syntax_table (Lisp_Object obj) |
8489eb67 | 734 | { |
47f5f6ae KS |
735 | CHECK_TYPE (CHAR_TABLE_P (obj) && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table), |
736 | Qsyntax_table_p, obj); | |
7d0393cf | 737 | } |
8489eb67 | 738 | |
8489eb67 | 739 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, |
fdb82f93 PJ |
740 | doc: /* Return the current syntax table. |
741 | This is the one specified by the current buffer. */) | |
5842a27b | 742 | (void) |
8489eb67 RS |
743 | { |
744 | return current_buffer->syntax_table; | |
745 | } | |
746 | ||
747 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
748 | Sstandard_syntax_table, 0, 0, 0, | |
fdb82f93 PJ |
749 | doc: /* Return the standard syntax table. |
750 | This is the one used for new buffers. */) | |
5842a27b | 751 | (void) |
8489eb67 RS |
752 | { |
753 | return Vstandard_syntax_table; | |
754 | } | |
755 | ||
756 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
fdb82f93 PJ |
757 | doc: /* Construct a new syntax table and return it. |
758 | It is a copy of the TABLE, which defaults to the standard syntax table. */) | |
5842a27b | 759 | (Lisp_Object table) |
8489eb67 | 760 | { |
8ea151b2 RS |
761 | Lisp_Object copy; |
762 | ||
265a9e55 | 763 | if (!NILP (table)) |
8ea151b2 RS |
764 | check_syntax_table (table); |
765 | else | |
766 | table = Vstandard_syntax_table; | |
767 | ||
768 | copy = Fcopy_sequence (table); | |
0f867324 RS |
769 | |
770 | /* Only the standard syntax table should have a default element. | |
771 | Other syntax tables should inherit from parents instead. */ | |
772 | XCHAR_TABLE (copy)->defalt = Qnil; | |
773 | ||
774 | /* Copied syntax tables should all have parents. | |
775 | If we copied one with no parent, such as the standard syntax table, | |
776 | use the standard syntax table as the copy's parent. */ | |
777 | if (NILP (XCHAR_TABLE (copy)->parent)) | |
778 | Fset_char_table_parent (copy, Vstandard_syntax_table); | |
8ea151b2 | 779 | return copy; |
8489eb67 RS |
780 | } |
781 | ||
782 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
fdb82f93 PJ |
783 | doc: /* Select a new syntax table for the current buffer. |
784 | One argument, a syntax table. */) | |
5842a27b | 785 | (Lisp_Object table) |
8489eb67 | 786 | { |
4e4dfa78 | 787 | int idx; |
8ea151b2 | 788 | check_syntax_table (table); |
8489eb67 RS |
789 | current_buffer->syntax_table = table; |
790 | /* Indicate that this buffer now has a specified syntax table. */ | |
f6cd0527 GM |
791 | idx = PER_BUFFER_VAR_IDX (syntax_table); |
792 | SET_PER_BUFFER_VALUE_P (current_buffer, idx, 1); | |
8489eb67 RS |
793 | return table; |
794 | } | |
795 | \f | |
796 | /* Convert a letter which signifies a syntax code | |
797 | into the code it signifies. | |
195d1361 | 798 | This is used by modify-syntax-entry, and other things. */ |
8489eb67 RS |
799 | |
800 | unsigned char syntax_spec_code[0400] = | |
801 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
802 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
803 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
804 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
195d1361 | 805 | (char) Swhitespace, (char) Scomment_fence, (char) Sstring, 0377, |
8489eb67 RS |
806 | (char) Smath, 0377, 0377, (char) Squote, |
807 | (char) Sopen, (char) Sclose, 0377, 0377, | |
808 | 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
809 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
810 | 0377, 0377, 0377, 0377, | |
811 | (char) Scomment, 0377, (char) Sendcomment, 0377, | |
6cb71bf6 | 812 | (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ |
8489eb67 RS |
813 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
814 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
815 | 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
816 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
817 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
818 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
195d1361 | 819 | 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
8489eb67 RS |
820 | }; |
821 | ||
195d1361 | 822 | /* Indexed by syntax code, give the letter that describes it. */ |
8489eb67 | 823 | |
195d1361 | 824 | char syntax_code_spec[16] = |
8489eb67 | 825 | { |
195d1361 RS |
826 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@', |
827 | '!', '|' | |
8489eb67 | 828 | }; |
93da5fff KH |
829 | |
830 | /* Indexed by syntax code, give the object (cons of syntax code and | |
831 | nil) to be stored in syntax table. Since these objects can be | |
832 | shared among syntax tables, we generate them in advance. By | |
833 | sharing objects, the function `describe-syntax' can give a more | |
834 | compact listing. */ | |
835 | static Lisp_Object Vsyntax_code_object; | |
836 | ||
8489eb67 RS |
837 | \f |
838 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, | |
fdb82f93 | 839 | doc: /* Return the syntax code of CHARACTER, described by a character. |
e2b6daf4 CY |
840 | For example, if CHARACTER is a word constituent, the |
841 | character `w' (119) is returned. | |
fdb82f93 PJ |
842 | The characters that correspond to various syntax codes |
843 | are listed in the documentation of `modify-syntax-entry'. */) | |
5842a27b | 844 | (Lisp_Object character) |
8489eb67 | 845 | { |
8ea151b2 | 846 | int char_int; |
774b9a60 | 847 | CHECK_CHARACTER (character); |
2203e1e8 | 848 | char_int = XINT (character); |
d48cd3f4 | 849 | SETUP_BUFFER_SYNTAX_TABLE (); |
8ea151b2 | 850 | return make_number (syntax_code_spec[(int) SYNTAX (char_int)]); |
beefa22e RS |
851 | } |
852 | ||
853 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
fdb82f93 | 854 | doc: /* Return the matching parenthesis of CHARACTER, or nil if none. */) |
5842a27b | 855 | (Lisp_Object character) |
beefa22e | 856 | { |
8ea151b2 | 857 | int char_int, code; |
b7826503 | 858 | CHECK_NUMBER (character); |
2203e1e8 | 859 | char_int = XINT (character); |
d48cd3f4 | 860 | SETUP_BUFFER_SYNTAX_TABLE (); |
8ea151b2 | 861 | code = SYNTAX (char_int); |
a8bd7cd8 | 862 | if (code == Sopen || code == Sclose) |
2e34157c | 863 | return SYNTAX_MATCH (char_int); |
beefa22e | 864 | return Qnil; |
8489eb67 RS |
865 | } |
866 | ||
c65adb44 | 867 | DEFUN ("string-to-syntax", Fstring_to_syntax, Sstring_to_syntax, 1, 1, 0, |
fdb82f93 PJ |
868 | doc: /* Convert a syntax specification STRING into syntax cell form. |
869 | STRING should be a string as it is allowed as argument of | |
870 | `modify-syntax-entry'. Value is the equivalent cons cell | |
bce3dc36 | 871 | \(CODE . MATCHING-CHAR) that can be used as value of a `syntax-table' |
fdb82f93 | 872 | text property. */) |
5842a27b | 873 | (Lisp_Object string) |
8489eb67 | 874 | { |
2e567bd3 | 875 | register const unsigned char *p; |
8489eb67 | 876 | register enum syntaxcode code; |
247e20a8 | 877 | int val; |
8ea151b2 | 878 | Lisp_Object match; |
8489eb67 | 879 | |
b7826503 | 880 | CHECK_STRING (string); |
8489eb67 | 881 | |
d5db4077 | 882 | p = SDATA (string); |
8489eb67 RS |
883 | code = (enum syntaxcode) syntax_spec_code[*p++]; |
884 | if (((int) code & 0377) == 0377) | |
b764a653 | 885 | error ("Invalid syntax description letter: %c", p[-1]); |
8489eb67 | 886 | |
8ea151b2 | 887 | if (code == Sinherit) |
c65adb44 | 888 | return Qnil; |
8ea151b2 RS |
889 | |
890 | if (*p) | |
d1be9f0f | 891 | { |
93da5fff | 892 | int len; |
62a6e103 | 893 | int character = STRING_CHAR_AND_LENGTH (p, len); |
93da5fff | 894 | XSETINT (match, character); |
d1be9f0f RS |
895 | if (XFASTINT (match) == ' ') |
896 | match = Qnil; | |
93da5fff | 897 | p += len; |
d1be9f0f RS |
898 | } |
899 | else | |
8ea151b2 | 900 | match = Qnil; |
8489eb67 | 901 | |
8ea151b2 | 902 | val = (int) code; |
8489eb67 RS |
903 | while (*p) |
904 | switch (*p++) | |
905 | { | |
906 | case '1': | |
247e20a8 | 907 | val |= 1 << 16; |
8489eb67 RS |
908 | break; |
909 | ||
910 | case '2': | |
247e20a8 | 911 | val |= 1 << 17; |
8489eb67 RS |
912 | break; |
913 | ||
914 | case '3': | |
247e20a8 | 915 | val |= 1 << 18; |
8489eb67 RS |
916 | break; |
917 | ||
918 | case '4': | |
247e20a8 | 919 | val |= 1 << 19; |
8489eb67 RS |
920 | break; |
921 | ||
922 | case 'p': | |
247e20a8 | 923 | val |= 1 << 20; |
8489eb67 | 924 | break; |
e5d4f4dc RS |
925 | |
926 | case 'b': | |
247e20a8 | 927 | val |= 1 << 21; |
e5d4f4dc | 928 | break; |
95ff8dfc RS |
929 | |
930 | case 'n': | |
931 | val |= 1 << 22; | |
932 | break; | |
8489eb67 | 933 | } |
7d0393cf | 934 | |
93da5fff | 935 | if (val < XVECTOR (Vsyntax_code_object)->size && NILP (match)) |
c65adb44 | 936 | return XVECTOR (Vsyntax_code_object)->contents[val]; |
93da5fff KH |
937 | else |
938 | /* Since we can't use a shared object, let's make a new one. */ | |
c65adb44 SM |
939 | return Fcons (make_number (val), match); |
940 | } | |
941 | ||
fdb82f93 | 942 | /* I really don't know why this is interactive |
2c9e1900 | 943 | help-form should at least be made useful whilst reading the second arg. */ |
7d0393cf | 944 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, |
c65adb44 | 945 | "cSet syntax for character: \nsSet syntax for %s to: ", |
a50a10a0 | 946 | doc: /* Set syntax for character CHAR according to string NEWENTRY. |
d7ee9fab | 947 | The syntax is changed only for table SYNTAX-TABLE, which defaults to |
fdb82f93 | 948 | the current buffer's syntax table. |
5c7b02ab | 949 | CHAR may be a cons (MIN . MAX), in which case, syntaxes of all characters |
fedc6ab5 | 950 | in the range MIN to MAX are changed. |
fdb82f93 PJ |
951 | The first character of NEWENTRY should be one of the following: |
952 | Space or - whitespace syntax. w word constituent. | |
953 | _ symbol constituent. . punctuation. | |
954 | ( open-parenthesis. ) close-parenthesis. | |
955 | " string quote. \\ escape. | |
956 | $ paired delimiter. ' expression quote or prefix operator. | |
957 | < comment starter. > comment ender. | |
958 | / character-quote. @ inherit from `standard-syntax-table'. | |
959 | | generic string fence. ! generic comment fence. | |
960 | ||
961 | Only single-character comment start and end sequences are represented thus. | |
962 | Two-character sequences are represented as described below. | |
963 | The second character of NEWENTRY is the matching parenthesis, | |
964 | used only if the first character is `(' or `)'. | |
965 | Any additional characters are flags. | |
966 | Defined flags are the characters 1, 2, 3, 4, b, p, and n. | |
a50a10a0 PJ |
967 | 1 means CHAR is the start of a two-char comment start sequence. |
968 | 2 means CHAR is the second character of such a sequence. | |
969 | 3 means CHAR is the start of a two-char comment end sequence. | |
970 | 4 means CHAR is the second character of such a sequence. | |
fdb82f93 PJ |
971 | |
972 | There can be up to two orthogonal comment sequences. This is to support | |
973 | language modes such as C++. By default, all comment sequences are of style | |
974 | a, but you can set the comment sequence style to b (on the second character | |
975 | of a comment-start, or the first character of a comment-end sequence) using | |
976 | this flag: | |
a50a10a0 PJ |
977 | b means CHAR is part of comment sequence b. |
978 | n means CHAR is part of a nestable comment sequence. | |
fdb82f93 | 979 | |
a50a10a0 | 980 | p means CHAR is a prefix character for `backward-prefix-chars'; |
fdb82f93 | 981 | such characters are treated as whitespace when they occur |
a50a10a0 | 982 | between expressions. |
fedc6ab5 | 983 | usage: (modify-syntax-entry CHAR NEWENTRY &optional SYNTAX-TABLE) */) |
5842a27b | 984 | (Lisp_Object c, Lisp_Object newentry, Lisp_Object syntax_table) |
c65adb44 | 985 | { |
5c7b02ab KH |
986 | if (CONSP (c)) |
987 | { | |
8f924df7 KH |
988 | CHECK_CHARACTER_CAR (c); |
989 | CHECK_CHARACTER_CDR (c); | |
5c7b02ab KH |
990 | } |
991 | else | |
992 | CHECK_CHARACTER (c); | |
c65adb44 SM |
993 | |
994 | if (NILP (syntax_table)) | |
995 | syntax_table = current_buffer->syntax_table; | |
996 | else | |
997 | check_syntax_table (syntax_table); | |
8489eb67 | 998 | |
5c7b02ab KH |
999 | newentry = Fstring_to_syntax (newentry); |
1000 | if (CONSP (c)) | |
1001 | SET_RAW_SYNTAX_ENTRY_RANGE (syntax_table, c, newentry); | |
1002 | else | |
1003 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), newentry); | |
e5b94d44 CY |
1004 | |
1005 | /* We clear the regexp cache, since character classes can now have | |
1006 | different values from those in the compiled regexps.*/ | |
1007 | clear_regexp_cache (); | |
1008 | ||
8489eb67 RS |
1009 | return Qnil; |
1010 | } | |
1011 | \f | |
1012 | /* Dump syntax table to buffer in human-readable format */ | |
1013 | ||
62abe9cb SM |
1014 | DEFUN ("internal-describe-syntax-value", Finternal_describe_syntax_value, |
1015 | Sinternal_describe_syntax_value, 1, 1, 0, | |
1016 | doc: /* Insert a description of the internal syntax description SYNTAX at point. */) | |
5842a27b | 1017 | (Lisp_Object syntax) |
8489eb67 RS |
1018 | { |
1019 | register enum syntaxcode code; | |
e6365855 | 1020 | char desc, start1, start2, end1, end2, prefix, comstyle, comnested; |
8489eb67 | 1021 | char str[2]; |
62abe9cb | 1022 | Lisp_Object first, match_lisp, value = syntax; |
8489eb67 | 1023 | |
8ea151b2 RS |
1024 | if (NILP (value)) |
1025 | { | |
62abe9cb SM |
1026 | insert_string ("default"); |
1027 | return syntax; | |
8ea151b2 RS |
1028 | } |
1029 | ||
908b7fea KH |
1030 | if (CHAR_TABLE_P (value)) |
1031 | { | |
62abe9cb SM |
1032 | insert_string ("deeper char-table ..."); |
1033 | return syntax; | |
908b7fea KH |
1034 | } |
1035 | ||
8ea151b2 RS |
1036 | if (!CONSP (value)) |
1037 | { | |
62abe9cb SM |
1038 | insert_string ("invalid"); |
1039 | return syntax; | |
8ea151b2 RS |
1040 | } |
1041 | ||
c1d497be KR |
1042 | first = XCAR (value); |
1043 | match_lisp = XCDR (value); | |
8ea151b2 RS |
1044 | |
1045 | if (!INTEGERP (first) || !(NILP (match_lisp) || INTEGERP (match_lisp))) | |
8489eb67 | 1046 | { |
62abe9cb SM |
1047 | insert_string ("invalid"); |
1048 | return syntax; | |
8489eb67 RS |
1049 | } |
1050 | ||
e704cb4b | 1051 | code = (enum syntaxcode) (XINT (first) & 0377); |
8ea151b2 RS |
1052 | start1 = (XINT (first) >> 16) & 1; |
1053 | start2 = (XINT (first) >> 17) & 1; | |
1054 | end1 = (XINT (first) >> 18) & 1; | |
1055 | end2 = (XINT (first) >> 19) & 1; | |
1056 | prefix = (XINT (first) >> 20) & 1; | |
1057 | comstyle = (XINT (first) >> 21) & 1; | |
e6365855 | 1058 | comnested = (XINT (first) >> 22) & 1; |
8489eb67 RS |
1059 | |
1060 | if ((int) code < 0 || (int) code >= (int) Smax) | |
1061 | { | |
1062 | insert_string ("invalid"); | |
62abe9cb | 1063 | return syntax; |
8489eb67 RS |
1064 | } |
1065 | desc = syntax_code_spec[(int) code]; | |
1066 | ||
1067 | str[0] = desc, str[1] = 0; | |
1068 | insert (str, 1); | |
1069 | ||
93da5fff KH |
1070 | if (NILP (match_lisp)) |
1071 | insert (" ", 1); | |
1072 | else | |
1073 | insert_char (XINT (match_lisp)); | |
8489eb67 | 1074 | |
8489eb67 RS |
1075 | if (start1) |
1076 | insert ("1", 1); | |
1077 | if (start2) | |
1078 | insert ("2", 1); | |
1079 | ||
1080 | if (end1) | |
1081 | insert ("3", 1); | |
1082 | if (end2) | |
1083 | insert ("4", 1); | |
1084 | ||
1085 | if (prefix) | |
1086 | insert ("p", 1); | |
e5d4f4dc RS |
1087 | if (comstyle) |
1088 | insert ("b", 1); | |
e6365855 SM |
1089 | if (comnested) |
1090 | insert ("n", 1); | |
8489eb67 RS |
1091 | |
1092 | insert_string ("\twhich means: "); | |
1093 | ||
0220c518 | 1094 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
1095 | { |
1096 | case Swhitespace: | |
1097 | insert_string ("whitespace"); break; | |
1098 | case Spunct: | |
1099 | insert_string ("punctuation"); break; | |
1100 | case Sword: | |
1101 | insert_string ("word"); break; | |
1102 | case Ssymbol: | |
1103 | insert_string ("symbol"); break; | |
1104 | case Sopen: | |
1105 | insert_string ("open"); break; | |
1106 | case Sclose: | |
1107 | insert_string ("close"); break; | |
1108 | case Squote: | |
d671382e | 1109 | insert_string ("prefix"); break; |
8489eb67 RS |
1110 | case Sstring: |
1111 | insert_string ("string"); break; | |
1112 | case Smath: | |
1113 | insert_string ("math"); break; | |
1114 | case Sescape: | |
1115 | insert_string ("escape"); break; | |
1116 | case Scharquote: | |
1117 | insert_string ("charquote"); break; | |
1118 | case Scomment: | |
1119 | insert_string ("comment"); break; | |
1120 | case Sendcomment: | |
1121 | insert_string ("endcomment"); break; | |
d671382e SM |
1122 | case Sinherit: |
1123 | insert_string ("inherit"); break; | |
1124 | case Scomment_fence: | |
1125 | insert_string ("comment fence"); break; | |
1126 | case Sstring_fence: | |
1127 | insert_string ("string fence"); break; | |
8489eb67 RS |
1128 | default: |
1129 | insert_string ("invalid"); | |
62abe9cb | 1130 | return syntax; |
8489eb67 RS |
1131 | } |
1132 | ||
8ea151b2 | 1133 | if (!NILP (match_lisp)) |
8489eb67 RS |
1134 | { |
1135 | insert_string (", matches "); | |
8ea151b2 | 1136 | insert_char (XINT (match_lisp)); |
8489eb67 RS |
1137 | } |
1138 | ||
1139 | if (start1) | |
1140 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
1141 | if (start2) | |
1142 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
1143 | ||
1144 | if (end1) | |
1145 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
1146 | if (end2) | |
1147 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
1148 | if (comstyle) |
1149 | insert_string (" (comment style b)"); | |
e6365855 SM |
1150 | if (comnested) |
1151 | insert_string (" (nestable)"); | |
e5d4f4dc | 1152 | |
8489eb67 RS |
1153 | if (prefix) |
1154 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
1155 | ||
62abe9cb SM |
1156 | return syntax; |
1157 | } | |
8489eb67 | 1158 | \f |
195d1361 RS |
1159 | int parse_sexp_ignore_comments; |
1160 | ||
8f924df7 KH |
1161 | /* Char-table of functions that find the next or previous word |
1162 | boundary. */ | |
1163 | Lisp_Object Vfind_word_boundary_function_table; | |
869bb237 | 1164 | |
8489eb67 RS |
1165 | /* Return the position across COUNT words from FROM. |
1166 | If that many words cannot be found before the end of the buffer, return 0. | |
1167 | COUNT negative means scan backward and stop at word beginning. */ | |
1168 | ||
dfcf069d | 1169 | int |
971de7fb | 1170 | scan_words (register int from, register int count) |
8489eb67 RS |
1171 | { |
1172 | register int beg = BEGV; | |
1173 | register int end = ZV; | |
6a140a74 | 1174 | register int from_byte = CHAR_TO_BYTE (from); |
93da5fff KH |
1175 | register enum syntaxcode code; |
1176 | int ch0, ch1; | |
8f924df7 | 1177 | Lisp_Object func, script, pos; |
8489eb67 RS |
1178 | |
1179 | immediate_quit = 1; | |
1180 | QUIT; | |
1181 | ||
195d1361 RS |
1182 | SETUP_SYNTAX_TABLE (from, count); |
1183 | ||
8489eb67 RS |
1184 | while (count > 0) |
1185 | { | |
1186 | while (1) | |
1187 | { | |
1188 | if (from == end) | |
1189 | { | |
1190 | immediate_quit = 0; | |
1191 | return 0; | |
1192 | } | |
195d1361 | 1193 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 1194 | ch0 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
93da5fff | 1195 | code = SYNTAX (ch0); |
6a140a74 | 1196 | INC_BOTH (from, from_byte); |
8489eb67 RS |
1197 | if (words_include_escapes |
1198 | && (code == Sescape || code == Scharquote)) | |
1199 | break; | |
1200 | if (code == Sword) | |
1201 | break; | |
8489eb67 | 1202 | } |
93da5fff KH |
1203 | /* Now CH0 is a character which begins a word and FROM is the |
1204 | position of the next character. */ | |
8f924df7 | 1205 | func = CHAR_TABLE_REF (Vfind_word_boundary_function_table, ch0); |
869bb237 | 1206 | if (! NILP (Ffboundp (func))) |
8489eb67 | 1207 | { |
869bb237 | 1208 | pos = call2 (func, make_number (from - 1), make_number (end)); |
8f924df7 KH |
1209 | if (INTEGERP (pos) && XINT (pos) > from) |
1210 | { | |
1211 | from = XINT (pos); | |
1212 | from_byte = CHAR_TO_BYTE (from); | |
1213 | } | |
8489eb67 | 1214 | } |
869bb237 | 1215 | else |
8cb8232a | 1216 | { |
8cb8232a KH |
1217 | script = CHAR_TABLE_REF (Vchar_script_table, ch0); |
1218 | while (1) | |
1219 | { | |
1220 | if (from == end) break; | |
1221 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
b7dbcc19 | 1222 | ch1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8cb8232a KH |
1223 | code = SYNTAX (ch1); |
1224 | if ((code != Sword | |
1225 | && (! words_include_escapes | |
1226 | || (code != Sescape && code != Scharquote))) | |
2b70a11c | 1227 | || word_boundary_p (ch0, ch1)) |
869bb237 | 1228 | break; |
8cb8232a KH |
1229 | INC_BOTH (from, from_byte); |
1230 | ch0 = ch1; | |
1231 | } | |
8489eb67 RS |
1232 | } |
1233 | count--; | |
1234 | } | |
1235 | while (count < 0) | |
1236 | { | |
1237 | while (1) | |
1238 | { | |
1239 | if (from == beg) | |
1240 | { | |
1241 | immediate_quit = 0; | |
1242 | return 0; | |
1243 | } | |
6a140a74 | 1244 | DEC_BOTH (from, from_byte); |
195d1361 | 1245 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 1246 | ch1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
93da5fff | 1247 | code = SYNTAX (ch1); |
8489eb67 RS |
1248 | if (words_include_escapes |
1249 | && (code == Sescape || code == Scharquote)) | |
1250 | break; | |
1251 | if (code == Sword) | |
1252 | break; | |
8489eb67 | 1253 | } |
93da5fff KH |
1254 | /* Now CH1 is a character which ends a word and FROM is the |
1255 | position of it. */ | |
8f924df7 | 1256 | func = CHAR_TABLE_REF (Vfind_word_boundary_function_table, ch1); |
869bb237 | 1257 | if (! NILP (Ffboundp (func))) |
8f924df7 | 1258 | { |
869bb237 | 1259 | pos = call2 (func, make_number (from), make_number (beg)); |
8f924df7 KH |
1260 | if (INTEGERP (pos) && XINT (pos) < from) |
1261 | { | |
1262 | from = XINT (pos); | |
1263 | from_byte = CHAR_TO_BYTE (from); | |
1264 | } | |
8489eb67 | 1265 | } |
869bb237 | 1266 | else |
8489eb67 | 1267 | { |
8cb8232a KH |
1268 | script = CHAR_TABLE_REF (Vchar_script_table, ch1); |
1269 | while (1) | |
1270 | { | |
8cb8232a KH |
1271 | if (from == beg) |
1272 | break; | |
262be72a | 1273 | DEC_BOTH (from, from_byte); |
8cb8232a | 1274 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
262be72a | 1275 | ch0 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8cb8232a KH |
1276 | code = SYNTAX (ch0); |
1277 | if ((code != Sword | |
1278 | && (! words_include_escapes | |
1279 | || (code != Sescape && code != Scharquote))) | |
2b70a11c | 1280 | || word_boundary_p (ch0, ch1)) |
262be72a MB |
1281 | { |
1282 | INC_BOTH (from, from_byte); | |
1283 | break; | |
1284 | } | |
8cb8232a KH |
1285 | ch1 = ch0; |
1286 | } | |
8489eb67 RS |
1287 | } |
1288 | count++; | |
1289 | } | |
1290 | ||
1291 | immediate_quit = 0; | |
1292 | ||
1293 | return from; | |
1294 | } | |
1295 | ||
1e9dbb5f | 1296 | DEFUN ("forward-word", Fforward_word, Sforward_word, 0, 1, "^p", |
fdb82f93 PJ |
1297 | doc: /* Move point forward ARG words (backward if ARG is negative). |
1298 | Normally returns t. | |
1299 | If an edge of the buffer or a field boundary is reached, point is left there | |
1300 | and the function returns nil. Field boundaries are not noticed if | |
1301 | `inhibit-field-text-motion' is non-nil. */) | |
5842a27b | 1302 | (Lisp_Object arg) |
8489eb67 | 1303 | { |
c096ae4d | 1304 | Lisp_Object tmp; |
2c6ea900 | 1305 | int orig_val, val; |
8489eb67 | 1306 | |
839966f3 KH |
1307 | if (NILP (arg)) |
1308 | XSETFASTINT (arg, 1); | |
1309 | else | |
1310 | CHECK_NUMBER (arg); | |
1311 | ||
1312 | val = orig_val = scan_words (PT, XINT (arg)); | |
2c6ea900 | 1313 | if (! orig_val) |
839966f3 | 1314 | val = XINT (arg) > 0 ? ZV : BEGV; |
5878ee6f | 1315 | |
b8855607 | 1316 | /* Avoid jumping out of an input field. */ |
c096ae4d SM |
1317 | tmp = Fconstrain_to_field (make_number (val), make_number (PT), |
1318 | Qt, Qnil, Qnil); | |
1319 | val = XFASTINT (tmp); | |
7d0393cf | 1320 | |
8489eb67 | 1321 | SET_PT (val); |
e6d8341f | 1322 | return val == orig_val ? Qt : Qnil; |
8489eb67 RS |
1323 | } |
1324 | \f | |
dd4c5104 | 1325 | Lisp_Object skip_chars (int, Lisp_Object, Lisp_Object, int); |
195d1361 RS |
1326 | |
1327 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, | |
fdb82f93 PJ |
1328 | doc: /* Move point forward, stopping before a char not in STRING, or at pos LIM. |
1329 | STRING is like the inside of a `[...]' in a regular expression | |
1330 | except that `]' is never special and `\\' quotes `^', `-' or `\\' | |
7087d5e9 | 1331 | (but not at the end of a range; quoting is never needed there). |
fdb82f93 PJ |
1332 | Thus, with arg "a-zA-Z", this skips letters stopping before first nonletter. |
1333 | With arg "^a-zA-Z", skips nonletters stopping before first letter. | |
a1bc88d4 RS |
1334 | Char classes, e.g. `[:alpha:]', are supported. |
1335 | ||
1336 | Returns the distance traveled, either zero or positive. */) | |
5842a27b | 1337 | (Lisp_Object string, Lisp_Object lim) |
195d1361 | 1338 | { |
327719ee | 1339 | return skip_chars (1, string, lim, 1); |
195d1361 RS |
1340 | } |
1341 | ||
1342 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, | |
fdb82f93 PJ |
1343 | doc: /* Move point backward, stopping after a char not in STRING, or at pos LIM. |
1344 | See `skip-chars-forward' for details. | |
1345 | Returns the distance traveled, either zero or negative. */) | |
5842a27b | 1346 | (Lisp_Object string, Lisp_Object lim) |
195d1361 | 1347 | { |
327719ee | 1348 | return skip_chars (0, string, lim, 1); |
195d1361 RS |
1349 | } |
1350 | ||
1351 | DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0, | |
fdb82f93 PJ |
1352 | doc: /* Move point forward across chars in specified syntax classes. |
1353 | SYNTAX is a string of syntax code characters. | |
1354 | Stop before a char whose syntax is not in SYNTAX, or at position LIM. | |
1355 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1356 | This function returns the distance traveled, either zero or positive. */) | |
5842a27b | 1357 | (Lisp_Object syntax, Lisp_Object lim) |
195d1361 | 1358 | { |
b7dbcc19 | 1359 | return skip_syntaxes (1, syntax, lim); |
195d1361 RS |
1360 | } |
1361 | ||
1362 | DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0, | |
fdb82f93 PJ |
1363 | doc: /* Move point backward across chars in specified syntax classes. |
1364 | SYNTAX is a string of syntax code characters. | |
1365 | Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM. | |
1366 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1367 | This function returns the distance traveled, either zero or negative. */) | |
5842a27b | 1368 | (Lisp_Object syntax, Lisp_Object lim) |
195d1361 | 1369 | { |
b7dbcc19 | 1370 | return skip_syntaxes (0, syntax, lim); |
195d1361 RS |
1371 | } |
1372 | ||
6a140a74 | 1373 | static Lisp_Object |
971de7fb | 1374 | skip_chars (int forwardp, Lisp_Object string, Lisp_Object lim, int handle_iso_classes) |
195d1361 | 1375 | { |
195d1361 RS |
1376 | register unsigned int c; |
1377 | unsigned char fastmap[0400]; | |
b7dbcc19 | 1378 | /* Store the ranges of non-ASCII characters. */ |
5df4982e | 1379 | int *char_ranges; |
7e68b0ea | 1380 | int n_char_ranges = 0; |
195d1361 | 1381 | int negate = 0; |
4101e6fe | 1382 | register int i, i_byte; |
b7dbcc19 KH |
1383 | /* Set to 1 if the current buffer is multibyte and the region |
1384 | contains non-ASCII chars. */ | |
1385 | int multibyte; | |
1386 | /* Set to 1 if STRING is multibyte and it contains non-ASCII | |
1387 | chars. */ | |
1674d9a2 RS |
1388 | int string_multibyte; |
1389 | int size_byte; | |
2e567bd3 | 1390 | const unsigned char *str; |
82d497fc | 1391 | int len; |
a1bc88d4 | 1392 | Lisp_Object iso_classes; |
195d1361 | 1393 | |
b7826503 | 1394 | CHECK_STRING (string); |
a1bc88d4 | 1395 | iso_classes = Qnil; |
82d497fc | 1396 | |
195d1361 RS |
1397 | if (NILP (lim)) |
1398 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1399 | else | |
b7826503 | 1400 | CHECK_NUMBER_COERCE_MARKER (lim); |
195d1361 RS |
1401 | |
1402 | /* In any case, don't allow scan outside bounds of buffer. */ | |
195d1361 RS |
1403 | if (XINT (lim) > ZV) |
1404 | XSETFASTINT (lim, ZV); | |
1405 | if (XINT (lim) < BEGV) | |
1406 | XSETFASTINT (lim, BEGV); | |
1407 | ||
b7dbcc19 | 1408 | multibyte = (!NILP (current_buffer->enable_multibyte_characters) |
92eaa22e | 1409 | && (XINT (lim) - PT != CHAR_TO_BYTE (XINT (lim)) - PT_BYTE)); |
8f924df7 | 1410 | string_multibyte = SBYTES (string) > SCHARS (string); |
b7dbcc19 | 1411 | |
72af86bd | 1412 | memset (fastmap, 0, sizeof fastmap); |
195d1361 | 1413 | |
8f924df7 KH |
1414 | str = SDATA (string); |
1415 | size_byte = SBYTES (string); | |
4101e6fe | 1416 | |
82d497fc | 1417 | i_byte = 0; |
13090112 | 1418 | if (i_byte < size_byte |
d5db4077 | 1419 | && SREF (string, 0) == '^') |
195d1361 | 1420 | { |
82d497fc | 1421 | negate = 1; i_byte++; |
195d1361 RS |
1422 | } |
1423 | ||
1424 | /* Find the characters specified and set their elements of fastmap. | |
b7dbcc19 | 1425 | Handle backslashes and ranges specially. |
195d1361 | 1426 | |
b7dbcc19 KH |
1427 | If STRING contains non-ASCII characters, setup char_ranges for |
1428 | them and use fastmap only for their leading codes. */ | |
4101e6fe | 1429 | |
b7dbcc19 | 1430 | if (! string_multibyte) |
195d1361 | 1431 | { |
b7dbcc19 | 1432 | int string_has_eight_bit = 0; |
4101e6fe | 1433 | |
b7dbcc19 KH |
1434 | /* At first setup fastmap. */ |
1435 | while (i_byte < size_byte) | |
1436 | { | |
1437 | c = str[i_byte++]; | |
1438 | ||
a1bc88d4 RS |
1439 | if (handle_iso_classes && c == '[' |
1440 | && i_byte < size_byte | |
327719ee | 1441 | && str[i_byte] == ':') |
a1bc88d4 RS |
1442 | { |
1443 | const unsigned char *class_beg = str + i_byte + 1; | |
1444 | const unsigned char *class_end = class_beg; | |
b3bda4fd | 1445 | const unsigned char *class_limit = str + size_byte - 2; |
db9cd97a | 1446 | /* Leave room for the null. */ |
a1bc88d4 RS |
1447 | unsigned char class_name[CHAR_CLASS_MAX_LENGTH + 1]; |
1448 | re_wctype_t cc; | |
1449 | ||
1450 | if (class_limit - class_beg > CHAR_CLASS_MAX_LENGTH) | |
1451 | class_limit = class_beg + CHAR_CLASS_MAX_LENGTH; | |
1452 | ||
b3bda4fd KS |
1453 | while (class_end < class_limit |
1454 | && *class_end >= 'a' && *class_end <= 'z') | |
a1bc88d4 RS |
1455 | class_end++; |
1456 | ||
b3bda4fd KS |
1457 | if (class_end == class_beg |
1458 | || *class_end != ':' || class_end[1] != ']') | |
1459 | goto not_a_class_name; | |
a1bc88d4 | 1460 | |
72af86bd | 1461 | memcpy (class_name, class_beg, class_end - class_beg); |
a1bc88d4 RS |
1462 | class_name[class_end - class_beg] = 0; |
1463 | ||
1464 | cc = re_wctype (class_name); | |
1465 | if (cc == 0) | |
1466 | error ("Invalid ISO C character class"); | |
1467 | ||
1468 | iso_classes = Fcons (make_number (cc), iso_classes); | |
1469 | ||
1470 | i_byte = class_end + 2 - str; | |
1471 | continue; | |
1472 | } | |
1473 | ||
b3bda4fd | 1474 | not_a_class_name: |
b7dbcc19 KH |
1475 | if (c == '\\') |
1476 | { | |
13090112 | 1477 | if (i_byte == size_byte) |
4101e6fe RS |
1478 | break; |
1479 | ||
5c7b02ab | 1480 | c = str[i_byte++]; |
195d1361 | 1481 | } |
839966f3 KH |
1482 | /* Treat `-' as range character only if another character |
1483 | follows. */ | |
1484 | if (i_byte + 1 < size_byte | |
82d497fc | 1485 | && str[i_byte] == '-') |
195d1361 | 1486 | { |
9690d026 | 1487 | unsigned int c2; |
4101e6fe RS |
1488 | |
1489 | /* Skip over the dash. */ | |
82d497fc | 1490 | i_byte++; |
4101e6fe | 1491 | |
4101e6fe | 1492 | /* Get the end of the range. */ |
5c7b02ab | 1493 | c2 = str[i_byte++]; |
b7dbcc19 KH |
1494 | if (c2 == '\\' |
1495 | && i_byte < size_byte) | |
1496 | c2 = str[i_byte++]; | |
1497 | ||
8f924df7 KH |
1498 | if (c <= c2) |
1499 | { | |
1500 | while (c <= c2) | |
1501 | fastmap[c++] = 1; | |
1502 | if (! ASCII_CHAR_P (c2)) | |
1503 | string_has_eight_bit = 1; | |
1504 | } | |
195d1361 RS |
1505 | } |
1506 | else | |
b7dbcc19 KH |
1507 | { |
1508 | fastmap[c] = 1; | |
1509 | if (! ASCII_CHAR_P (c)) | |
1510 | string_has_eight_bit = 1; | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | /* If the current range is multibyte and STRING contains | |
1515 | eight-bit chars, arrange fastmap and setup char_ranges for | |
1516 | the corresponding multibyte chars. */ | |
1517 | if (multibyte && string_has_eight_bit) | |
1518 | { | |
1519 | unsigned char fastmap2[0400]; | |
1520 | int range_start_byte, range_start_char; | |
1521 | ||
72af86bd AS |
1522 | memcpy (fastmap + 0200, fastmap2 + 0200, 0200); |
1523 | memset (fastmap + 0200, 0, 0200); | |
b7dbcc19 KH |
1524 | /* We are sure that this loop stops. */ |
1525 | for (i = 0200; ! fastmap2[i]; i++); | |
4c0354d7 | 1526 | c = BYTE8_TO_CHAR (i); |
b7dbcc19 KH |
1527 | fastmap[CHAR_LEADING_CODE (c)] = 1; |
1528 | range_start_byte = i; | |
1529 | range_start_char = c; | |
f003ca54 | 1530 | char_ranges = (int *) alloca (sizeof (int) * 128 * 2); |
b7dbcc19 KH |
1531 | for (i = 129; i < 0400; i++) |
1532 | { | |
4c0354d7 | 1533 | c = BYTE8_TO_CHAR (i); |
b7dbcc19 KH |
1534 | fastmap[CHAR_LEADING_CODE (c)] = 1; |
1535 | if (i - range_start_byte != c - range_start_char) | |
1536 | { | |
1537 | char_ranges[n_char_ranges++] = range_start_char; | |
1538 | char_ranges[n_char_ranges++] = ((i - 1 - range_start_byte) | |
1539 | + range_start_char); | |
1540 | range_start_byte = i; | |
1541 | range_start_char = c; | |
8f924df7 | 1542 | } |
b7dbcc19 KH |
1543 | } |
1544 | char_ranges[n_char_ranges++] = range_start_char; | |
1545 | char_ranges[n_char_ranges++] = ((i - 1 - range_start_byte) | |
1546 | + range_start_char); | |
195d1361 RS |
1547 | } |
1548 | } | |
f003ca54 | 1549 | else /* STRING is multibyte */ |
b7dbcc19 | 1550 | { |
f003ca54 KH |
1551 | char_ranges = (int *) alloca (sizeof (int) * SCHARS (string) * 2); |
1552 | ||
b7dbcc19 | 1553 | while (i_byte < size_byte) |
195d1361 | 1554 | { |
b7dbcc19 | 1555 | unsigned char leading_code; |
5c7b02ab | 1556 | |
b7dbcc19 | 1557 | leading_code = str[i_byte]; |
62a6e103 | 1558 | c = STRING_CHAR_AND_LENGTH (str + i_byte, len); |
b7dbcc19 | 1559 | i_byte += len; |
5c7b02ab | 1560 | |
327719ee MB |
1561 | if (handle_iso_classes && c == '[' |
1562 | && i_byte < size_byte | |
62a6e103 | 1563 | && STRING_CHAR (str + i_byte) == ':') |
327719ee MB |
1564 | { |
1565 | const unsigned char *class_beg = str + i_byte + 1; | |
1566 | const unsigned char *class_end = class_beg; | |
1567 | const unsigned char *class_limit = str + size_byte - 2; | |
1568 | /* Leave room for the null. */ | |
1569 | unsigned char class_name[CHAR_CLASS_MAX_LENGTH + 1]; | |
1570 | re_wctype_t cc; | |
1571 | ||
1572 | if (class_limit - class_beg > CHAR_CLASS_MAX_LENGTH) | |
1573 | class_limit = class_beg + CHAR_CLASS_MAX_LENGTH; | |
1574 | ||
1575 | while (class_end < class_limit | |
1576 | && *class_end >= 'a' && *class_end <= 'z') | |
1577 | class_end++; | |
1578 | ||
1579 | if (class_end == class_beg | |
1580 | || *class_end != ':' || class_end[1] != ']') | |
1581 | goto not_a_class_name_multibyte; | |
1582 | ||
72af86bd | 1583 | memcpy (class_name, class_beg, class_end - class_beg); |
327719ee MB |
1584 | class_name[class_end - class_beg] = 0; |
1585 | ||
1586 | cc = re_wctype (class_name); | |
1587 | if (cc == 0) | |
1588 | error ("Invalid ISO C character class"); | |
1589 | ||
1590 | iso_classes = Fcons (make_number (cc), iso_classes); | |
1591 | ||
1592 | i_byte = class_end + 2 - str; | |
1593 | continue; | |
1594 | } | |
1595 | ||
1596 | not_a_class_name_multibyte: | |
195d1361 RS |
1597 | if (c == '\\') |
1598 | { | |
13090112 | 1599 | if (i_byte == size_byte) |
4101e6fe RS |
1600 | break; |
1601 | ||
b7dbcc19 | 1602 | leading_code = str[i_byte]; |
62a6e103 | 1603 | c = STRING_CHAR_AND_LENGTH (str + i_byte, len); |
82d497fc | 1604 | i_byte += len; |
195d1361 | 1605 | } |
839966f3 KH |
1606 | /* Treat `-' as range character only if another character |
1607 | follows. */ | |
1608 | if (i_byte + 1 < size_byte | |
82d497fc | 1609 | && str[i_byte] == '-') |
195d1361 | 1610 | { |
9690d026 | 1611 | unsigned int c2; |
b7dbcc19 | 1612 | unsigned char leading_code2; |
4101e6fe RS |
1613 | |
1614 | /* Skip over the dash. */ | |
82d497fc | 1615 | i_byte++; |
4101e6fe | 1616 | |
4101e6fe | 1617 | /* Get the end of the range. */ |
b7dbcc19 | 1618 | leading_code2 = str[i_byte]; |
62a6e103 | 1619 | c2 = STRING_CHAR_AND_LENGTH (str + i_byte, len); |
82d497fc | 1620 | i_byte += len; |
7e68b0ea | 1621 | |
b7dbcc19 KH |
1622 | if (c2 == '\\' |
1623 | && i_byte < size_byte) | |
1624 | { | |
1625 | leading_code2 = str[i_byte]; | |
62a6e103 | 1626 | c2 =STRING_CHAR_AND_LENGTH (str + i_byte, len); |
b7dbcc19 KH |
1627 | i_byte += len; |
1628 | } | |
1629 | ||
f003ca54 KH |
1630 | if (c > c2) |
1631 | continue; | |
b7dbcc19 | 1632 | if (ASCII_CHAR_P (c)) |
06274af5 | 1633 | { |
5c7b02ab KH |
1634 | while (c <= c2 && c < 0x80) |
1635 | fastmap[c++] = 1; | |
b7dbcc19 KH |
1636 | leading_code = CHAR_LEADING_CODE (c); |
1637 | } | |
1638 | if (! ASCII_CHAR_P (c)) | |
1639 | { | |
1640 | while (leading_code <= leading_code2) | |
1641 | fastmap[leading_code++] = 1; | |
1642 | if (c <= c2) | |
e39091b6 | 1643 | { |
b7dbcc19 | 1644 | char_ranges[n_char_ranges++] = c; |
e39091b6 | 1645 | char_ranges[n_char_ranges++] = c2; |
06274af5 KH |
1646 | } |
1647 | } | |
195d1361 RS |
1648 | } |
1649 | else | |
7e68b0ea | 1650 | { |
b7dbcc19 | 1651 | if (ASCII_CHAR_P (c)) |
e39091b6 KH |
1652 | fastmap[c] = 1; |
1653 | else | |
7e68b0ea | 1654 | { |
b7dbcc19 | 1655 | fastmap[leading_code] = 1; |
4101e6fe RS |
1656 | char_ranges[n_char_ranges++] = c; |
1657 | char_ranges[n_char_ranges++] = c; | |
7e68b0ea RS |
1658 | } |
1659 | } | |
195d1361 | 1660 | } |
b7dbcc19 KH |
1661 | |
1662 | /* If the current range is unibyte and STRING contains non-ASCII | |
1663 | chars, arrange fastmap for the corresponding unibyte | |
1664 | chars. */ | |
1665 | ||
1666 | if (! multibyte && n_char_ranges > 0) | |
1667 | { | |
72af86bd | 1668 | memset (fastmap + 0200, 0, 0200); |
b7dbcc19 KH |
1669 | for (i = 0; i < n_char_ranges; i += 2) |
1670 | { | |
1671 | int c1 = char_ranges[i]; | |
1672 | int c2 = char_ranges[i + 1]; | |
1673 | ||
1674 | for (; c1 <= c2; c1++) | |
2afc21f5 SM |
1675 | { |
1676 | int b = CHAR_TO_BYTE_SAFE (c1); | |
1677 | if (b >= 0) | |
1678 | fastmap[b] = 1; | |
1679 | } | |
b7dbcc19 KH |
1680 | } |
1681 | } | |
195d1361 RS |
1682 | } |
1683 | ||
9690d026 | 1684 | /* If ^ was the first character, complement the fastmap. */ |
195d1361 | 1685 | if (negate) |
b7dbcc19 KH |
1686 | { |
1687 | if (! multibyte) | |
1688 | for (i = 0; i < sizeof fastmap; i++) | |
1689 | fastmap[i] ^= 1; | |
1690 | else | |
1691 | { | |
1692 | for (i = 0; i < 0200; i++) | |
1693 | fastmap[i] ^= 1; | |
1694 | /* All non-ASCII chars possibly match. */ | |
1695 | for (; i < sizeof fastmap; i++) | |
1696 | fastmap[i] = 1; | |
1697 | } | |
1698 | } | |
195d1361 RS |
1699 | |
1700 | { | |
1701 | int start_point = PT; | |
1702 | int pos = PT; | |
6a140a74 | 1703 | int pos_byte = PT_BYTE; |
9af7511a KH |
1704 | unsigned char *p = PT_ADDR, *endp, *stop; |
1705 | ||
1706 | if (forwardp) | |
1707 | { | |
1708 | endp = (XINT (lim) == GPT) ? GPT_ADDR : CHAR_POS_ADDR (XINT (lim)); | |
d7ee9fab | 1709 | stop = (pos < GPT && GPT < XINT (lim)) ? GPT_ADDR : endp; |
9af7511a KH |
1710 | } |
1711 | else | |
1712 | { | |
1713 | endp = CHAR_POS_ADDR (XINT (lim)); | |
d7ee9fab | 1714 | stop = (pos >= GPT && GPT > XINT (lim)) ? GAP_END_ADDR : endp; |
9af7511a | 1715 | } |
195d1361 RS |
1716 | |
1717 | immediate_quit = 1; | |
618db430 SM |
1718 | /* This code may look up syntax tables using macros that rely on the |
1719 | gl_state object. To make sure this object is not out of date, | |
1720 | let's initialize it manually. | |
1721 | We ignore syntax-table text-properties for now, since that's | |
1722 | what we've done in the past. */ | |
d48cd3f4 | 1723 | SETUP_BUFFER_SYNTAX_TABLE (); |
b7dbcc19 | 1724 | if (forwardp) |
195d1361 | 1725 | { |
b7dbcc19 | 1726 | if (multibyte) |
8f924df7 | 1727 | while (1) |
b7dbcc19 | 1728 | { |
8f924df7 | 1729 | int nbytes; |
9af7511a | 1730 | |
8f924df7 | 1731 | if (p >= stop) |
9af7511a | 1732 | { |
8f924df7 | 1733 | if (p >= endp) |
9af7511a | 1734 | break; |
8f924df7 KH |
1735 | p = GAP_END_ADDR; |
1736 | stop = endp; | |
9af7511a | 1737 | } |
62a6e103 | 1738 | c = STRING_CHAR_AND_LENGTH (p, nbytes); |
327719ee | 1739 | if (! NILP (iso_classes) && in_classes (c, iso_classes)) |
9af7511a | 1740 | { |
327719ee | 1741 | if (negate) |
9af7511a | 1742 | break; |
327719ee MB |
1743 | else |
1744 | goto fwd_ok; | |
9af7511a | 1745 | } |
9af7511a | 1746 | |
8f924df7 | 1747 | if (! fastmap[*p]) |
b7dbcc19 KH |
1748 | break; |
1749 | if (! ASCII_CHAR_P (c)) | |
9af7511a | 1750 | { |
b7dbcc19 KH |
1751 | /* As we are looking at a multibyte character, we |
1752 | must look up the character in the table | |
1753 | CHAR_RANGES. If there's no data in the table, | |
1754 | that character is not what we want to skip. */ | |
1755 | ||
1756 | /* The following code do the right thing even if | |
1757 | n_char_ranges is zero (i.e. no data in | |
1758 | CHAR_RANGES). */ | |
1759 | for (i = 0; i < n_char_ranges; i += 2) | |
1760 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
9af7511a | 1761 | break; |
b7dbcc19 KH |
1762 | if (!(negate ^ (i < n_char_ranges))) |
1763 | break; | |
9af7511a | 1764 | } |
327719ee | 1765 | fwd_ok: |
8f924df7 | 1766 | p += nbytes, pos++, pos_byte += nbytes; |
b7dbcc19 KH |
1767 | } |
1768 | else | |
8f924df7 KH |
1769 | while (1) |
1770 | { | |
1771 | if (p >= stop) | |
9af7511a | 1772 | { |
8f924df7 | 1773 | if (p >= endp) |
9af7511a | 1774 | break; |
8f924df7 KH |
1775 | p = GAP_END_ADDR; |
1776 | stop = endp; | |
9af7511a | 1777 | } |
327719ee MB |
1778 | |
1779 | if (!NILP (iso_classes) && in_classes (*p, iso_classes)) | |
1780 | { | |
1781 | if (negate) | |
1782 | break; | |
1783 | else | |
1784 | goto fwd_unibyte_ok; | |
1785 | } | |
1786 | ||
8f924df7 KH |
1787 | if (!fastmap[*p]) |
1788 | break; | |
327719ee | 1789 | fwd_unibyte_ok: |
8f924df7 KH |
1790 | p++, pos++, pos_byte++; |
1791 | } | |
195d1361 RS |
1792 | } |
1793 | else | |
1794 | { | |
b7dbcc19 | 1795 | if (multibyte) |
8f924df7 | 1796 | while (1) |
b7dbcc19 | 1797 | { |
8f924df7 | 1798 | unsigned char *prev_p; |
9af7511a | 1799 | |
8f924df7 | 1800 | if (p <= stop) |
9af7511a | 1801 | { |
8f924df7 | 1802 | if (p <= endp) |
9af7511a | 1803 | break; |
8f924df7 KH |
1804 | p = GPT_ADDR; |
1805 | stop = endp; | |
9af7511a | 1806 | } |
8f924df7 KH |
1807 | prev_p = p; |
1808 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
62a6e103 | 1809 | c = STRING_CHAR (p); |
a1bc88d4 | 1810 | |
327719ee MB |
1811 | if (! NILP (iso_classes) && in_classes (c, iso_classes)) |
1812 | { | |
1813 | if (negate) | |
1814 | break; | |
9690d026 | 1815 | else |
327719ee | 1816 | goto back_ok; |
7e68b0ea | 1817 | } |
a1bc88d4 | 1818 | |
8f924df7 | 1819 | if (! fastmap[*p]) |
b7dbcc19 KH |
1820 | break; |
1821 | if (! ASCII_CHAR_P (c)) | |
7e68b0ea | 1822 | { |
b7dbcc19 KH |
1823 | /* See the comment in the previous similar code. */ |
1824 | for (i = 0; i < n_char_ranges; i += 2) | |
1825 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
1826 | break; | |
1827 | if (!(negate ^ (i < n_char_ranges))) | |
1828 | break; | |
7e68b0ea | 1829 | } |
327719ee | 1830 | back_ok: |
8f924df7 | 1831 | pos--, pos_byte -= prev_p - p; |
b7dbcc19 KH |
1832 | } |
1833 | else | |
8f924df7 KH |
1834 | while (1) |
1835 | { | |
1836 | if (p <= stop) | |
9af7511a | 1837 | { |
8f924df7 | 1838 | if (p <= endp) |
9af7511a | 1839 | break; |
8f924df7 KH |
1840 | p = GPT_ADDR; |
1841 | stop = endp; | |
9af7511a | 1842 | } |
e39091b6 | 1843 | |
327719ee MB |
1844 | if (! NILP (iso_classes) && in_classes (p[-1], iso_classes)) |
1845 | { | |
1846 | if (negate) | |
1847 | break; | |
9af7511a | 1848 | else |
327719ee MB |
1849 | goto back_unibyte_ok; |
1850 | } | |
a1bc88d4 | 1851 | |
8f924df7 KH |
1852 | if (!fastmap[p[-1]]) |
1853 | break; | |
327719ee | 1854 | back_unibyte_ok: |
8f924df7 KH |
1855 | p--, pos--, pos_byte--; |
1856 | } | |
195d1361 | 1857 | } |
7e68b0ea | 1858 | |
b7dbcc19 KH |
1859 | SET_PT_BOTH (pos, pos_byte); |
1860 | immediate_quit = 0; | |
1861 | ||
1862 | return make_number (PT - start_point); | |
1863 | } | |
1864 | } | |
7e68b0ea | 1865 | |
b7dbcc19 KH |
1866 | |
1867 | static Lisp_Object | |
971de7fb | 1868 | skip_syntaxes (int forwardp, Lisp_Object string, Lisp_Object lim) |
b7dbcc19 KH |
1869 | { |
1870 | register unsigned int c; | |
1871 | unsigned char fastmap[0400]; | |
1872 | int negate = 0; | |
1873 | register int i, i_byte; | |
1874 | int multibyte; | |
1875 | int size_byte; | |
1876 | unsigned char *str; | |
1877 | ||
1878 | CHECK_STRING (string); | |
1879 | ||
1880 | if (NILP (lim)) | |
1881 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1882 | else | |
1883 | CHECK_NUMBER_COERCE_MARKER (lim); | |
1884 | ||
1885 | /* In any case, don't allow scan outside bounds of buffer. */ | |
1886 | if (XINT (lim) > ZV) | |
1887 | XSETFASTINT (lim, ZV); | |
1888 | if (XINT (lim) < BEGV) | |
1889 | XSETFASTINT (lim, BEGV); | |
1890 | ||
ade8ee9e | 1891 | if (forwardp ? (PT >= XFASTINT (lim)) : (PT <= XFASTINT (lim))) |
49feb1cd | 1892 | return make_number (0); |
8c6e735b | 1893 | |
b7dbcc19 | 1894 | multibyte = (!NILP (current_buffer->enable_multibyte_characters) |
92eaa22e | 1895 | && (XINT (lim) - PT != CHAR_TO_BYTE (XINT (lim)) - PT_BYTE)); |
b7dbcc19 | 1896 | |
72af86bd | 1897 | memset (fastmap, 0, sizeof fastmap); |
b7dbcc19 | 1898 | |
8f924df7 KH |
1899 | if (SBYTES (string) > SCHARS (string)) |
1900 | /* As this is very rare case (syntax spec is ASCII only), don't | |
1901 | consider efficiency. */ | |
bc796a59 KH |
1902 | string = string_make_unibyte (string); |
1903 | ||
8f924df7 KH |
1904 | str = SDATA (string); |
1905 | size_byte = SBYTES (string); | |
bc796a59 | 1906 | |
b7dbcc19 KH |
1907 | i_byte = 0; |
1908 | if (i_byte < size_byte | |
8f924df7 | 1909 | && SREF (string, 0) == '^') |
b7dbcc19 KH |
1910 | { |
1911 | negate = 1; i_byte++; | |
1912 | } | |
1913 | ||
b7dbcc19 KH |
1914 | /* Find the syntaxes specified and set their elements of fastmap. */ |
1915 | ||
1916 | while (i_byte < size_byte) | |
1917 | { | |
1918 | c = str[i_byte++]; | |
8f924df7 | 1919 | fastmap[syntax_spec_code[c]] = 1; |
b7dbcc19 | 1920 | } |
195d1361 | 1921 | |
9690d026 | 1922 | /* If ^ was the first character, complement the fastmap. */ |
195d1361 RS |
1923 | if (negate) |
1924 | for (i = 0; i < sizeof fastmap; i++) | |
9690d026 | 1925 | fastmap[i] ^= 1; |
195d1361 RS |
1926 | |
1927 | { | |
1928 | int start_point = PT; | |
1929 | int pos = PT; | |
6a140a74 | 1930 | int pos_byte = PT_BYTE; |
8f924df7 KH |
1931 | unsigned char *p = PT_ADDR, *endp, *stop; |
1932 | ||
1933 | if (forwardp) | |
1934 | { | |
1935 | endp = (XINT (lim) == GPT) ? GPT_ADDR : CHAR_POS_ADDR (XINT (lim)); | |
1936 | stop = (pos < GPT && GPT < XINT (lim)) ? GPT_ADDR : endp; | |
1937 | } | |
1938 | else | |
1939 | { | |
1940 | endp = CHAR_POS_ADDR (XINT (lim)); | |
1941 | stop = (pos >= GPT && GPT > XINT (lim)) ? GAP_END_ADDR : endp; | |
1942 | } | |
195d1361 RS |
1943 | |
1944 | immediate_quit = 1; | |
b7dbcc19 KH |
1945 | SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1); |
1946 | if (forwardp) | |
195d1361 | 1947 | { |
b7dbcc19 | 1948 | if (multibyte) |
195d1361 | 1949 | { |
8f924df7 | 1950 | while (1) |
8c6e735b | 1951 | { |
8f924df7 KH |
1952 | int nbytes; |
1953 | ||
1954 | if (p >= stop) | |
1955 | { | |
1956 | if (p >= endp) | |
1957 | break; | |
1958 | p = GAP_END_ADDR; | |
1959 | stop = endp; | |
1960 | } | |
62a6e103 | 1961 | c = STRING_CHAR_AND_LENGTH (p, nbytes); |
8f924df7 | 1962 | if (! fastmap[(int) SYNTAX (c)]) |
8c6e735b | 1963 | break; |
8f924df7 | 1964 | p += nbytes, pos++, pos_byte += nbytes; |
8c6e735b KH |
1965 | UPDATE_SYNTAX_TABLE_FORWARD (pos); |
1966 | } | |
195d1361 RS |
1967 | } |
1968 | else | |
1969 | { | |
8c6e735b | 1970 | while (1) |
7e68b0ea | 1971 | { |
8f924df7 KH |
1972 | if (p >= stop) |
1973 | { | |
1974 | if (p >= endp) | |
1975 | break; | |
1976 | p = GAP_END_ADDR; | |
1977 | stop = endp; | |
1978 | } | |
1979 | if (! fastmap[(int) SYNTAX (*p)]) | |
8c6e735b | 1980 | break; |
8f924df7 | 1981 | p++, pos++, pos_byte++; |
b7dbcc19 | 1982 | UPDATE_SYNTAX_TABLE_FORWARD (pos); |
195d1361 RS |
1983 | } |
1984 | } | |
1985 | } | |
1986 | else | |
1987 | { | |
b7dbcc19 | 1988 | if (multibyte) |
195d1361 | 1989 | { |
8c6e735b | 1990 | while (1) |
b7dbcc19 | 1991 | { |
8f924df7 KH |
1992 | unsigned char *prev_p; |
1993 | ||
1994 | if (p <= stop) | |
b7dbcc19 | 1995 | { |
8f924df7 KH |
1996 | if (p <= endp) |
1997 | break; | |
1998 | p = GPT_ADDR; | |
1999 | stop = endp; | |
b7dbcc19 | 2000 | } |
262be72a | 2001 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
8f924df7 KH |
2002 | prev_p = p; |
2003 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
62a6e103 | 2004 | c = STRING_CHAR (p); |
8f924df7 KH |
2005 | if (! fastmap[(int) SYNTAX (c)]) |
2006 | break; | |
2007 | pos--, pos_byte -= prev_p - p; | |
b7dbcc19 | 2008 | } |
195d1361 RS |
2009 | } |
2010 | else | |
2011 | { | |
8c6e735b KH |
2012 | while (1) |
2013 | { | |
8f924df7 KH |
2014 | if (p <= stop) |
2015 | { | |
2016 | if (p <= endp) | |
2017 | break; | |
2018 | p = GPT_ADDR; | |
2019 | stop = endp; | |
2020 | } | |
102f6132 | 2021 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
8f924df7 | 2022 | if (! fastmap[(int) SYNTAX (p[-1])]) |
8c6e735b | 2023 | break; |
8f924df7 | 2024 | p--, pos--, pos_byte--; |
8c6e735b | 2025 | } |
195d1361 RS |
2026 | } |
2027 | } | |
6a140a74 RS |
2028 | |
2029 | SET_PT_BOTH (pos, pos_byte); | |
195d1361 RS |
2030 | immediate_quit = 0; |
2031 | ||
2032 | return make_number (PT - start_point); | |
2033 | } | |
2034 | } | |
a1bc88d4 RS |
2035 | |
2036 | /* Return 1 if character C belongs to one of the ISO classes | |
2037 | in the list ISO_CLASSES. Each class is represented by an | |
2038 | integer which is its type according to re_wctype. */ | |
2039 | ||
2040 | static int | |
971de7fb | 2041 | in_classes (int c, Lisp_Object iso_classes) |
a1bc88d4 RS |
2042 | { |
2043 | int fits_class = 0; | |
2044 | ||
618db430 | 2045 | while (CONSP (iso_classes)) |
a1bc88d4 RS |
2046 | { |
2047 | Lisp_Object elt; | |
2048 | elt = XCAR (iso_classes); | |
2049 | iso_classes = XCDR (iso_classes); | |
2050 | ||
2051 | if (re_iswctype (c, XFASTINT (elt))) | |
2052 | fits_class = 1; | |
2053 | } | |
2054 | ||
2055 | return fits_class; | |
2056 | } | |
195d1361 | 2057 | \f |
95ff8dfc RS |
2058 | /* Jump over a comment, assuming we are at the beginning of one. |
2059 | FROM is the current position. | |
2060 | FROM_BYTE is the bytepos corresponding to FROM. | |
2061 | Do not move past STOP (a charpos). | |
2062 | The comment over which we have to jump is of style STYLE | |
2063 | (either SYNTAX_COMMENT_STYLE(foo) or ST_COMMENT_STYLE). | |
2064 | NESTING should be positive to indicate the nesting at the beginning | |
2065 | for nested comments and should be zero or negative else. | |
2066 | ST_COMMENT_STYLE cannot be nested. | |
2067 | PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character | |
2068 | (or 0 If the search cannot start in the middle of a two-character). | |
2069 | ||
2070 | If successful, return 1 and store the charpos of the comment's end | |
2071 | into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR. | |
2072 | Else, return 0 and store the charpos STOP into *CHARPOS_PTR, the | |
2073 | corresponding bytepos into *BYTEPOS_PTR and the current nesting | |
2074 | (as defined for state.incomment) in *INCOMMENT_PTR. | |
2075 | ||
2076 | The comment end is the last character of the comment rather than the | |
2077 | character just after the comment. | |
2078 | ||
2079 | Global syntax data is assumed to initially be valid for FROM and | |
2080 | remains valid for forward search starting at the returned position. */ | |
2081 | ||
2082 | static int | |
dd4c5104 DN |
2083 | forw_comment (EMACS_INT from, EMACS_INT from_byte, EMACS_INT stop, |
2084 | int nesting, int style, int prev_syntax, | |
2085 | EMACS_INT *charpos_ptr, EMACS_INT *bytepos_ptr, | |
2086 | int *incomment_ptr) | |
95ff8dfc RS |
2087 | { |
2088 | register int c, c1; | |
2089 | register enum syntaxcode code; | |
2090 | register int syntax; | |
2091 | ||
2092 | if (nesting <= 0) nesting = -1; | |
2093 | ||
2094 | /* Enter the loop in the middle so that we find | |
2095 | a 2-char comment ender if we start in the middle of it. */ | |
2096 | syntax = prev_syntax; | |
2097 | if (syntax != 0) goto forw_incomment; | |
2098 | ||
2099 | while (1) | |
2100 | { | |
2101 | if (from == stop) | |
2102 | { | |
2103 | *incomment_ptr = nesting; | |
2104 | *charpos_ptr = from; | |
2105 | *bytepos_ptr = from_byte; | |
2106 | return 0; | |
2107 | } | |
8f924df7 | 2108 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2109 | syntax = SYNTAX_WITH_FLAGS (c); |
2110 | code = syntax & 0xff; | |
2111 | if (code == Sendcomment | |
2112 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
abf8a9ff SM |
2113 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) ? |
2114 | (nesting > 0 && --nesting == 0) : nesting < 0)) | |
95ff8dfc RS |
2115 | /* we have encountered a comment end of the same style |
2116 | as the comment sequence which began this comment | |
2117 | section */ | |
2118 | break; | |
2119 | if (code == Scomment_fence | |
2120 | && style == ST_COMMENT_STYLE) | |
2121 | /* we have encountered a comment end of the same style | |
2122 | as the comment sequence which began this comment | |
2123 | section. */ | |
2124 | break; | |
2125 | if (nesting > 0 | |
2126 | && code == Scomment | |
abf8a9ff | 2127 | && SYNTAX_FLAGS_COMMENT_NESTED (syntax) |
95ff8dfc RS |
2128 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style) |
2129 | /* we have encountered a nested comment of the same style | |
2130 | as the comment sequence which began this comment section */ | |
2131 | nesting++; | |
2132 | INC_BOTH (from, from_byte); | |
2133 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
7d0393cf | 2134 | |
95ff8dfc RS |
2135 | forw_incomment: |
2136 | if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
2137 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
8f924df7 | 2138 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
abf8a9ff SM |
2139 | SYNTAX_COMEND_SECOND (c1)) |
2140 | && ((SYNTAX_FLAGS_COMMENT_NESTED (syntax) || | |
2141 | SYNTAX_COMMENT_NESTED (c1)) ? nesting > 0 : nesting < 0)) | |
4ffe723b GM |
2142 | { |
2143 | if (--nesting <= 0) | |
2144 | /* we have encountered a comment end of the same style | |
2145 | as the comment sequence which began this comment | |
2146 | section */ | |
2147 | break; | |
2148 | else | |
2149 | { | |
2150 | INC_BOTH (from, from_byte); | |
2151 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2152 | } | |
2153 | } | |
95ff8dfc RS |
2154 | if (nesting > 0 |
2155 | && from < stop | |
2156 | && SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
8f924df7 | 2157 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
95ff8dfc | 2158 | SYNTAX_COMMENT_STYLE (c1) == style |
abf8a9ff SM |
2159 | && SYNTAX_COMSTART_SECOND (c1)) |
2160 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) || | |
2161 | SYNTAX_COMMENT_NESTED (c1))) | |
95ff8dfc RS |
2162 | /* we have encountered a nested comment of the same style |
2163 | as the comment sequence which began this comment | |
2164 | section */ | |
2165 | { | |
2166 | INC_BOTH (from, from_byte); | |
2167 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2168 | nesting++; | |
2169 | } | |
2170 | } | |
2171 | *charpos_ptr = from; | |
2172 | *bytepos_ptr = from_byte; | |
2173 | return 1; | |
2174 | } | |
2175 | ||
b3cfe0c8 | 2176 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
177c0ea7 | 2177 | doc: /* |
ee648c11 | 2178 | Move forward across up to COUNT comments. If COUNT is negative, move backward. |
fdb82f93 PJ |
2179 | Stop scanning if we find something other than a comment or whitespace. |
2180 | Set point to where scanning stops. | |
ee648c11 | 2181 | If COUNT comments are found as expected, with nothing except whitespace |
fdb82f93 | 2182 | between them, return t; otherwise return nil. */) |
5842a27b | 2183 | (Lisp_Object count) |
b3cfe0c8 | 2184 | { |
2312c580 SM |
2185 | register EMACS_INT from; |
2186 | EMACS_INT from_byte; | |
2187 | register EMACS_INT stop; | |
8ea151b2 | 2188 | register int c, c1; |
b3cfe0c8 RS |
2189 | register enum syntaxcode code; |
2190 | int comstyle = 0; /* style of comment encountered */ | |
95ff8dfc | 2191 | int comnested = 0; /* whether the comment is nestable or not */ |
be720845 | 2192 | int found; |
2312c580 SM |
2193 | EMACS_INT count1; |
2194 | EMACS_INT out_charpos, out_bytepos; | |
95ff8dfc | 2195 | int dummy; |
840f481c | 2196 | |
b7826503 | 2197 | CHECK_NUMBER (count); |
840f481c | 2198 | count1 = XINT (count); |
195d1361 | 2199 | stop = count1 > 0 ? ZV : BEGV; |
b3cfe0c8 RS |
2200 | |
2201 | immediate_quit = 1; | |
2202 | QUIT; | |
2203 | ||
2204 | from = PT; | |
6a140a74 | 2205 | from_byte = PT_BYTE; |
b3cfe0c8 | 2206 | |
195d1361 | 2207 | SETUP_SYNTAX_TABLE (from, count1); |
840f481c | 2208 | while (count1 > 0) |
b3cfe0c8 | 2209 | { |
04882296 | 2210 | do |
b3cfe0c8 | 2211 | { |
f902a008 RS |
2212 | int comstart_first; |
2213 | ||
04882296 KH |
2214 | if (from == stop) |
2215 | { | |
ef316cf0 | 2216 | SET_PT_BOTH (from, from_byte); |
b7e6e612 | 2217 | immediate_quit = 0; |
04882296 KH |
2218 | return Qnil; |
2219 | } | |
b7dbcc19 | 2220 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
b3cfe0c8 | 2221 | code = SYNTAX (c); |
f902a008 | 2222 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 2223 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 2224 | comstyle = SYNTAX_COMMENT_STYLE (c); |
6a140a74 | 2225 | INC_BOTH (from, from_byte); |
f902a008 | 2226 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2227 | if (from < stop && comstart_first |
b7dbcc19 | 2228 | && (c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
8ea151b2 | 2229 | SYNTAX_COMSTART_SECOND (c1))) |
b3cfe0c8 | 2230 | { |
7d0393cf | 2231 | /* We have encountered a comment start sequence and we |
7fc8191e | 2232 | are ignoring all text inside comments. We must record |
b3cfe0c8 RS |
2233 | the comment style this sequence begins so that later, |
2234 | only a comment end of the same style actually ends | |
7fc8191e | 2235 | the comment section. */ |
b3cfe0c8 | 2236 | code = Scomment; |
8ea151b2 | 2237 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
95ff8dfc | 2238 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); |
6a140a74 | 2239 | INC_BOTH (from, from_byte); |
95ff8dfc | 2240 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 2241 | } |
04882296 | 2242 | } |
abf8a9ff | 2243 | while (code == Swhitespace || (code == Sendcomment && c == '\n')); |
6a140a74 | 2244 | |
da71ab91 KH |
2245 | if (code == Scomment_fence) |
2246 | comstyle = ST_COMMENT_STYLE; | |
2247 | else if (code != Scomment) | |
04882296 KH |
2248 | { |
2249 | immediate_quit = 0; | |
6a140a74 | 2250 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2251 | SET_PT_BOTH (from, from_byte); |
04882296 KH |
2252 | return Qnil; |
2253 | } | |
2254 | /* We're at the start of a comment. */ | |
95ff8dfc RS |
2255 | found = forw_comment (from, from_byte, stop, comnested, comstyle, 0, |
2256 | &out_charpos, &out_bytepos, &dummy); | |
2257 | from = out_charpos; from_byte = out_bytepos; | |
2258 | if (!found) | |
04882296 | 2259 | { |
95ff8dfc RS |
2260 | immediate_quit = 0; |
2261 | SET_PT_BOTH (from, from_byte); | |
2262 | return Qnil; | |
b3cfe0c8 | 2263 | } |
95ff8dfc RS |
2264 | INC_BOTH (from, from_byte); |
2265 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
04882296 | 2266 | /* We have skipped one comment. */ |
840f481c | 2267 | count1--; |
b3cfe0c8 RS |
2268 | } |
2269 | ||
840f481c | 2270 | while (count1 < 0) |
b3cfe0c8 | 2271 | { |
b9145dbb | 2272 | while (1) |
b3cfe0c8 | 2273 | { |
c65adb44 | 2274 | int quoted; |
f902a008 | 2275 | |
b9145dbb RS |
2276 | if (from <= stop) |
2277 | { | |
6a140a74 | 2278 | SET_PT_BOTH (BEGV, BEGV_BYTE); |
b9145dbb RS |
2279 | immediate_quit = 0; |
2280 | return Qnil; | |
2281 | } | |
b3cfe0c8 | 2282 | |
6a140a74 | 2283 | DEC_BOTH (from, from_byte); |
f902a008 | 2284 | /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */ |
6a140a74 | 2285 | quoted = char_quoted (from, from_byte); |
b7dbcc19 | 2286 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
b3cfe0c8 RS |
2287 | code = SYNTAX (c); |
2288 | comstyle = 0; | |
95ff8dfc | 2289 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2290 | if (code == Sendcomment) |
2291 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
b3cfe0c8 | 2292 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
f902a008 | 2293 | && prev_char_comend_first (from, from_byte) |
89c6809a | 2294 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
b3cfe0c8 | 2295 | { |
7fc8191e | 2296 | /* We must record the comment style encountered so that |
b3cfe0c8 | 2297 | later, we can match only the proper comment begin |
7fc8191e | 2298 | sequence of the same style. */ |
6a140a74 | 2299 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2300 | code = Sendcomment; |
2301 | /* Calling char_quoted, above, set up global syntax position | |
2302 | at the new value of FROM. */ | |
b7dbcc19 | 2303 | c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2304 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
2305 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
b3cfe0c8 RS |
2306 | } |
2307 | ||
195d1361 RS |
2308 | if (code == Scomment_fence) |
2309 | { | |
2310 | /* Skip until first preceding unquoted comment_fence. */ | |
6a140a74 | 2311 | int found = 0, ini = from, ini_byte = from_byte; |
7d0393cf | 2312 | |
6a140a74 | 2313 | while (1) |
195d1361 | 2314 | { |
6a140a74 | 2315 | DEC_BOTH (from, from_byte); |
195d1361 | 2316 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 2317 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
6a140a74 | 2318 | if (SYNTAX (c) == Scomment_fence |
7d0393cf | 2319 | && !char_quoted (from, from_byte)) |
195d1361 | 2320 | { |
7d0393cf | 2321 | found = 1; |
195d1361 RS |
2322 | break; |
2323 | } | |
fcdd4585 SM |
2324 | else if (from == stop) |
2325 | break; | |
195d1361 RS |
2326 | } |
2327 | if (found == 0) | |
2328 | { | |
2329 | from = ini; /* Set point to ini + 1. */ | |
6a140a74 | 2330 | from_byte = ini_byte; |
195d1361 RS |
2331 | goto leave; |
2332 | } | |
39c41ad4 SM |
2333 | else |
2334 | /* We have skipped one comment. */ | |
2335 | break; | |
195d1361 RS |
2336 | } |
2337 | else if (code == Sendcomment) | |
b3cfe0c8 | 2338 | { |
95ff8dfc | 2339 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2340 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2341 | if (found == -1) |
2342 | { | |
abf8a9ff SM |
2343 | if (c == '\n') |
2344 | /* This end-of-line is not an end-of-comment. | |
2345 | Treat it like a whitespace. | |
2346 | CC-mode (and maybe others) relies on this behavior. */ | |
2347 | ; | |
2348 | else | |
2349 | { | |
2350 | /* Failure: we should go back to the end of this | |
2351 | not-quite-endcomment. */ | |
2352 | if (SYNTAX(c) != code) | |
2353 | /* It was a two-char Sendcomment. */ | |
2354 | INC_BOTH (from, from_byte); | |
2355 | goto leave; | |
2356 | } | |
1aa963c8 | 2357 | } |
2b927d02 | 2358 | else |
abf8a9ff SM |
2359 | { |
2360 | /* We have skipped one comment. */ | |
2361 | from = out_charpos, from_byte = out_bytepos; | |
2362 | break; | |
2363 | } | |
b3cfe0c8 | 2364 | } |
bb0de084 | 2365 | else if (code != Swhitespace || quoted) |
b3cfe0c8 | 2366 | { |
195d1361 | 2367 | leave: |
b3cfe0c8 | 2368 | immediate_quit = 0; |
6a140a74 | 2369 | INC_BOTH (from, from_byte); |
ef316cf0 | 2370 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2371 | return Qnil; |
2372 | } | |
2373 | } | |
2374 | ||
840f481c | 2375 | count1++; |
b3cfe0c8 RS |
2376 | } |
2377 | ||
ef316cf0 | 2378 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2379 | immediate_quit = 0; |
2380 | return Qt; | |
2381 | } | |
2382 | \f | |
b7dbcc19 | 2383 | /* Return syntax code of character C if C is an ASCII character |
db9f48c3 | 2384 | or `multibyte_symbol_p' is zero. Otherwise, return Ssymbol. */ |
bd25db08 | 2385 | |
b7dbcc19 KH |
2386 | #define SYNTAX_WITH_MULTIBYTE_CHECK(c) \ |
2387 | ((ASCII_CHAR_P (c) || !multibyte_symbol_p) \ | |
bd25db08 KH |
2388 | ? SYNTAX (c) : Ssymbol) |
2389 | ||
6a140a74 | 2390 | static Lisp_Object |
971de7fb | 2391 | scan_lists (register EMACS_INT from, EMACS_INT count, EMACS_INT depth, int sexpflag) |
8489eb67 RS |
2392 | { |
2393 | Lisp_Object val; | |
932e6895 | 2394 | register EMACS_INT stop = count > 0 ? ZV : BEGV; |
93da5fff KH |
2395 | register int c, c1; |
2396 | int stringterm; | |
8489eb67 RS |
2397 | int quoted; |
2398 | int mathexit = 0; | |
93da5fff | 2399 | register enum syntaxcode code, temp_code; |
195d1361 | 2400 | int min_depth = depth; /* Err out if depth gets less than this. */ |
e5d4f4dc | 2401 | int comstyle = 0; /* style of comment encountered */ |
95ff8dfc | 2402 | int comnested = 0; /* whether the comment is nestable or not */ |
932e6895 SM |
2403 | EMACS_INT temp_pos; |
2404 | EMACS_INT last_good = from; | |
195d1361 | 2405 | int found; |
932e6895 SM |
2406 | EMACS_INT from_byte; |
2407 | EMACS_INT out_bytepos, out_charpos; | |
95ff8dfc | 2408 | int temp, dummy; |
bd25db08 | 2409 | int multibyte_symbol_p = sexpflag && multibyte_syntax_as_symbol; |
8489eb67 RS |
2410 | |
2411 | if (depth > 0) min_depth = 0; | |
2412 | ||
c3907a7e RS |
2413 | if (from > ZV) from = ZV; |
2414 | if (from < BEGV) from = BEGV; | |
2415 | ||
2416 | from_byte = CHAR_TO_BYTE (from); | |
2417 | ||
8489eb67 RS |
2418 | immediate_quit = 1; |
2419 | QUIT; | |
2420 | ||
195d1361 | 2421 | SETUP_SYNTAX_TABLE (from, count); |
8489eb67 RS |
2422 | while (count > 0) |
2423 | { | |
8489eb67 RS |
2424 | while (from < stop) |
2425 | { | |
f902a008 | 2426 | int comstart_first, prefix; |
195d1361 | 2427 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 2428 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
bd25db08 | 2429 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
f902a008 | 2430 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 2431 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 2432 | comstyle = SYNTAX_COMMENT_STYLE (c); |
f902a008 | 2433 | prefix = SYNTAX_PREFIX (c); |
7bf5e9e4 RS |
2434 | if (depth == min_depth) |
2435 | last_good = from; | |
6a140a74 | 2436 | INC_BOTH (from, from_byte); |
195d1361 | 2437 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2438 | if (from < stop && comstart_first |
327719ee MB |
2439 | && (c = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
2440 | SYNTAX_COMSTART_SECOND (c)) | |
8489eb67 | 2441 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2442 | { |
7d0393cf | 2443 | /* we have encountered a comment start sequence and we |
195d1361 | 2444 | are ignoring all text inside comments. We must record |
e5d4f4dc RS |
2445 | the comment style this sequence begins so that later, |
2446 | only a comment end of the same style actually ends | |
2447 | the comment section */ | |
2448 | code = Scomment; | |
b7dbcc19 | 2449 | c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2450 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
2451 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
6a140a74 | 2452 | INC_BOTH (from, from_byte); |
f902a008 | 2453 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
e5d4f4dc | 2454 | } |
7d0393cf | 2455 | |
f902a008 | 2456 | if (prefix) |
8489eb67 RS |
2457 | continue; |
2458 | ||
0220c518 | 2459 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2460 | { |
2461 | case Sescape: | |
2462 | case Scharquote: | |
8b8bf8e6 SM |
2463 | if (from == stop) |
2464 | goto lose; | |
6a140a74 | 2465 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2466 | /* treat following character as a word constituent */ |
2467 | case Sword: | |
2468 | case Ssymbol: | |
2469 | if (depth || !sexpflag) break; | |
195d1361 | 2470 | /* This word counts as a sexp; return at end of it. */ |
8489eb67 RS |
2471 | while (from < stop) |
2472 | { | |
195d1361 | 2473 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
7c7ca3d2 RS |
2474 | |
2475 | /* Some compilers can't handle this inside the switch. */ | |
b7dbcc19 | 2476 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
bd25db08 | 2477 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7c7ca3d2 | 2478 | switch (temp) |
8489eb67 RS |
2479 | { |
2480 | case Scharquote: | |
2481 | case Sescape: | |
6a140a74 | 2482 | INC_BOTH (from, from_byte); |
8b8bf8e6 SM |
2483 | if (from == stop) |
2484 | goto lose; | |
8489eb67 RS |
2485 | break; |
2486 | case Sword: | |
2487 | case Ssymbol: | |
2488 | case Squote: | |
2489 | break; | |
2490 | default: | |
2491 | goto done; | |
2492 | } | |
6a140a74 | 2493 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2494 | } |
2495 | goto done; | |
2496 | ||
195d1361 | 2497 | case Scomment_fence: |
95ff8dfc RS |
2498 | comstyle = ST_COMMENT_STYLE; |
2499 | /* FALLTHROUGH */ | |
2500 | case Scomment: | |
8489eb67 | 2501 | if (!parse_sexp_ignore_comments) break; |
95ff8dfc RS |
2502 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2503 | found = forw_comment (from, from_byte, stop, | |
2504 | comnested, comstyle, 0, | |
2505 | &out_charpos, &out_bytepos, &dummy); | |
2506 | from = out_charpos, from_byte = out_bytepos; | |
2507 | if (!found) | |
8489eb67 | 2508 | { |
95ff8dfc RS |
2509 | if (depth == 0) |
2510 | goto done; | |
2511 | goto lose; | |
8489eb67 | 2512 | } |
95ff8dfc RS |
2513 | INC_BOTH (from, from_byte); |
2514 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
8489eb67 RS |
2515 | break; |
2516 | ||
2517 | case Smath: | |
2518 | if (!sexpflag) | |
2519 | break; | |
b7dbcc19 | 2520 | if (from != stop && c == FETCH_CHAR_AS_MULTIBYTE (from_byte)) |
6a140a74 RS |
2521 | { |
2522 | INC_BOTH (from, from_byte); | |
2523 | } | |
8489eb67 RS |
2524 | if (mathexit) |
2525 | { | |
2526 | mathexit = 0; | |
2527 | goto close1; | |
2528 | } | |
2529 | mathexit = 1; | |
2530 | ||
2531 | case Sopen: | |
2532 | if (!++depth) goto done; | |
2533 | break; | |
2534 | ||
2535 | case Sclose: | |
2536 | close1: | |
2537 | if (!--depth) goto done; | |
2538 | if (depth < min_depth) | |
9471945b KS |
2539 | xsignal3 (Qscan_error, |
2540 | build_string ("Containing expression ends prematurely"), | |
2541 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2542 | break; |
2543 | ||
2544 | case Sstring: | |
195d1361 | 2545 | case Sstring_fence: |
ef316cf0 | 2546 | temp_pos = dec_bytepos (from_byte); |
b7dbcc19 | 2547 | stringterm = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
8489eb67 RS |
2548 | while (1) |
2549 | { | |
8b8bf8e6 SM |
2550 | if (from >= stop) |
2551 | goto lose; | |
195d1361 | 2552 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b7dbcc19 | 2553 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
42ebfa31 SM |
2554 | if (code == Sstring |
2555 | ? (c == stringterm | |
2556 | && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring) | |
bd25db08 | 2557 | : SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring_fence) |
195d1361 | 2558 | break; |
7c7ca3d2 RS |
2559 | |
2560 | /* Some compilers can't handle this inside the switch. */ | |
bd25db08 | 2561 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7c7ca3d2 | 2562 | switch (temp) |
8489eb67 RS |
2563 | { |
2564 | case Scharquote: | |
2565 | case Sescape: | |
6a140a74 | 2566 | INC_BOTH (from, from_byte); |
8489eb67 | 2567 | } |
6a140a74 | 2568 | INC_BOTH (from, from_byte); |
8489eb67 | 2569 | } |
6a140a74 | 2570 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2571 | if (!depth && sexpflag) goto done; |
2572 | break; | |
240c43e8 SM |
2573 | default: |
2574 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2575 | break; | |
8489eb67 RS |
2576 | } |
2577 | } | |
2578 | ||
2579 | /* Reached end of buffer. Error if within object, return nil if between */ | |
8b8bf8e6 SM |
2580 | if (depth) |
2581 | goto lose; | |
8489eb67 RS |
2582 | |
2583 | immediate_quit = 0; | |
2584 | return Qnil; | |
2585 | ||
2586 | /* End of object reached */ | |
2587 | done: | |
2588 | count--; | |
2589 | } | |
2590 | ||
2591 | while (count < 0) | |
2592 | { | |
8489eb67 RS |
2593 | while (from > stop) |
2594 | { | |
6a140a74 | 2595 | DEC_BOTH (from, from_byte); |
195d1361 | 2596 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
b7dbcc19 | 2597 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
bd25db08 | 2598 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7bf5e9e4 RS |
2599 | if (depth == min_depth) |
2600 | last_good = from; | |
7fc8191e | 2601 | comstyle = 0; |
95ff8dfc | 2602 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2603 | if (code == Sendcomment) |
2604 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 | 2605 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1674d9a2 | 2606 | && prev_char_comend_first (from, from_byte) |
8489eb67 | 2607 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2608 | { |
f902a008 | 2609 | /* We must record the comment style encountered so that |
e5d4f4dc | 2610 | later, we can match only the proper comment begin |
f902a008 | 2611 | sequence of the same style. */ |
6a140a74 | 2612 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2613 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
2614 | code = Sendcomment; | |
b7dbcc19 | 2615 | c1 = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
95ff8dfc RS |
2616 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
2617 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
e5d4f4dc | 2618 | } |
7d0393cf | 2619 | |
9828a477 | 2620 | /* Quoting turns anything except a comment-ender |
e6365855 | 2621 | into a word character. Note that this cannot be true |
f902a008 | 2622 | if we decremented FROM in the if-statement above. */ |
9828a477 | 2623 | if (code != Sendcomment && char_quoted (from, from_byte)) |
240c43e8 SM |
2624 | { |
2625 | DEC_BOTH (from, from_byte); | |
2626 | code = Sword; | |
2627 | } | |
9828a477 | 2628 | else if (SYNTAX_PREFIX (c)) |
8489eb67 RS |
2629 | continue; |
2630 | ||
9828a477 | 2631 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2632 | { |
2633 | case Sword: | |
2634 | case Ssymbol: | |
9828a477 KH |
2635 | case Sescape: |
2636 | case Scharquote: | |
8489eb67 | 2637 | if (depth || !sexpflag) break; |
195d1361 RS |
2638 | /* This word counts as a sexp; count object finished |
2639 | after passing it. */ | |
8489eb67 RS |
2640 | while (from > stop) |
2641 | { | |
6a140a74 | 2642 | temp_pos = from_byte; |
ef316cf0 RS |
2643 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2644 | DEC_POS (temp_pos); | |
2645 | else | |
2646 | temp_pos--; | |
6a140a74 | 2647 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
b7dbcc19 | 2648 | c1 = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
bd25db08 | 2649 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
9828a477 KH |
2650 | /* Don't allow comment-end to be quoted. */ |
2651 | if (temp_code == Sendcomment) | |
2652 | goto done2; | |
6a140a74 | 2653 | quoted = char_quoted (from - 1, temp_pos); |
8489eb67 | 2654 | if (quoted) |
93da5fff | 2655 | { |
6a140a74 | 2656 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2657 | temp_pos = dec_bytepos (temp_pos); |
6a140a74 | 2658 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff | 2659 | } |
b7dbcc19 | 2660 | c1 = FETCH_CHAR_AS_MULTIBYTE (temp_pos); |
bd25db08 | 2661 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
93da5fff KH |
2662 | if (! (quoted || temp_code == Sword |
2663 | || temp_code == Ssymbol | |
2664 | || temp_code == Squote)) | |
8489eb67 | 2665 | goto done2; |
6a140a74 | 2666 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2667 | } |
2668 | goto done2; | |
2669 | ||
2670 | case Smath: | |
2671 | if (!sexpflag) | |
2672 | break; | |
ef316cf0 | 2673 | temp_pos = dec_bytepos (from_byte); |
6a140a74 | 2674 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
b7dbcc19 | 2675 | if (from != stop && c == FETCH_CHAR_AS_MULTIBYTE (temp_pos)) |
6a140a74 | 2676 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2677 | if (mathexit) |
2678 | { | |
2679 | mathexit = 0; | |
2680 | goto open2; | |
2681 | } | |
2682 | mathexit = 1; | |
2683 | ||
2684 | case Sclose: | |
2685 | if (!++depth) goto done2; | |
2686 | break; | |
2687 | ||
2688 | case Sopen: | |
2689 | open2: | |
2690 | if (!--depth) goto done2; | |
2691 | if (depth < min_depth) | |
9471945b KS |
2692 | xsignal3 (Qscan_error, |
2693 | build_string ("Containing expression ends prematurely"), | |
2694 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2695 | break; |
2696 | ||
2697 | case Sendcomment: | |
2698 | if (!parse_sexp_ignore_comments) | |
2699 | break; | |
95ff8dfc | 2700 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2701 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2702 | /* FIXME: if found == -1, then it really wasn't a comment-end. |
2703 | For single-char Sendcomment, we can't do much about it apart | |
2704 | from skipping the char. | |
2705 | For 2-char endcomments, we could try again, taking both | |
2706 | chars as separate entities, but it's a lot of trouble | |
2707 | for very little gain, so we don't bother either. -sm */ | |
6a140a74 RS |
2708 | if (found != -1) |
2709 | from = out_charpos, from_byte = out_bytepos; | |
8489eb67 RS |
2710 | break; |
2711 | ||
195d1361 RS |
2712 | case Scomment_fence: |
2713 | case Sstring_fence: | |
2714 | while (1) | |
2715 | { | |
8b8bf8e6 SM |
2716 | if (from == stop) |
2717 | goto lose; | |
6b61353c | 2718 | DEC_BOTH (from, from_byte); |
195d1361 | 2719 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
7d0393cf | 2720 | if (!char_quoted (from, from_byte) |
b7dbcc19 | 2721 | && (c = FETCH_CHAR_AS_MULTIBYTE (from_byte), |
bd25db08 | 2722 | SYNTAX_WITH_MULTIBYTE_CHECK (c) == code)) |
195d1361 RS |
2723 | break; |
2724 | } | |
2725 | if (code == Sstring_fence && !depth && sexpflag) goto done2; | |
2726 | break; | |
7d0393cf | 2727 | |
8489eb67 | 2728 | case Sstring: |
b7dbcc19 | 2729 | stringterm = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
8489eb67 RS |
2730 | while (1) |
2731 | { | |
8b8bf8e6 SM |
2732 | if (from == stop) |
2733 | goto lose; | |
6b61353c KH |
2734 | DEC_BOTH (from, from_byte); |
2735 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
2736 | if (!char_quoted (from, from_byte) | |
2737 | && (stringterm | |
2738 | == (c = FETCH_CHAR_AS_MULTIBYTE (from_byte))) | |
42ebfa31 | 2739 | && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring) |
8489eb67 | 2740 | break; |
8489eb67 | 2741 | } |
8489eb67 RS |
2742 | if (!depth && sexpflag) goto done2; |
2743 | break; | |
240c43e8 SM |
2744 | default: |
2745 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2746 | break; | |
8489eb67 RS |
2747 | } |
2748 | } | |
2749 | ||
2750 | /* Reached start of buffer. Error if within object, return nil if between */ | |
8b8bf8e6 SM |
2751 | if (depth) |
2752 | goto lose; | |
8489eb67 RS |
2753 | |
2754 | immediate_quit = 0; | |
2755 | return Qnil; | |
2756 | ||
2757 | done2: | |
2758 | count++; | |
2759 | } | |
2760 | ||
2761 | ||
2762 | immediate_quit = 0; | |
1e142fb7 | 2763 | XSETFASTINT (val, from); |
8489eb67 RS |
2764 | return val; |
2765 | ||
2766 | lose: | |
9471945b KS |
2767 | xsignal3 (Qscan_error, |
2768 | build_string ("Unbalanced parentheses"), | |
2769 | make_number (last_good), make_number (from)); | |
8489eb67 RS |
2770 | } |
2771 | ||
8489eb67 | 2772 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, |
fdb82f93 PJ |
2773 | doc: /* Scan from character number FROM by COUNT lists. |
2774 | Returns the character number of the position thus found. | |
2775 | ||
2776 | If DEPTH is nonzero, paren depth begins counting from that value, | |
2777 | only places where the depth in parentheses becomes zero | |
2778 | are candidates for stopping; COUNT such places are counted. | |
2779 | Thus, a positive value for DEPTH means go out levels. | |
2780 | ||
2781 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2782 | ||
2783 | If the beginning or end of (the accessible part of) the buffer is reached | |
2784 | and the depth is wrong, an error is signaled. | |
2785 | If the depth is right but the count is not used up, nil is returned. */) | |
5842a27b | 2786 | (Lisp_Object from, Lisp_Object count, Lisp_Object depth) |
8489eb67 | 2787 | { |
b7826503 PJ |
2788 | CHECK_NUMBER (from); |
2789 | CHECK_NUMBER (count); | |
2790 | CHECK_NUMBER (depth); | |
8489eb67 RS |
2791 | |
2792 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
2793 | } | |
2794 | ||
2795 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
fdb82f93 PJ |
2796 | doc: /* Scan from character number FROM by COUNT balanced expressions. |
2797 | If COUNT is negative, scan backwards. | |
2798 | Returns the character number of the position thus found. | |
2799 | ||
2800 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2801 | ||
2802 | If the beginning or end of (the accessible part of) the buffer is reached | |
2803 | in the middle of a parenthetical grouping, an error is signaled. | |
2804 | If the beginning or end is reached between groupings | |
2805 | but before count is used up, nil is returned. */) | |
5842a27b | 2806 | (Lisp_Object from, Lisp_Object count) |
8489eb67 | 2807 | { |
b7826503 PJ |
2808 | CHECK_NUMBER (from); |
2809 | CHECK_NUMBER (count); | |
8489eb67 RS |
2810 | |
2811 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
2812 | } | |
2813 | ||
2814 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
fdb82f93 PJ |
2815 | 0, 0, 0, |
2816 | doc: /* Move point backward over any number of chars with prefix syntax. | |
2817 | This includes chars with "quote" or "prefix" syntax (' or p). */) | |
5842a27b | 2818 | (void) |
8489eb67 RS |
2819 | { |
2820 | int beg = BEGV; | |
6a140a74 RS |
2821 | int opoint = PT; |
2822 | int opoint_byte = PT_BYTE; | |
6ec8bbd2 | 2823 | int pos = PT; |
6a140a74 | 2824 | int pos_byte = PT_BYTE; |
93da5fff | 2825 | int c; |
93da5fff | 2826 | |
7d0393cf | 2827 | if (pos <= beg) |
195d1361 | 2828 | { |
f902a008 RS |
2829 | SET_PT_BOTH (opoint, opoint_byte); |
2830 | ||
2831 | return Qnil; | |
195d1361 | 2832 | } |
8489eb67 | 2833 | |
f902a008 RS |
2834 | SETUP_SYNTAX_TABLE (pos, -1); |
2835 | ||
6a140a74 RS |
2836 | DEC_BOTH (pos, pos_byte); |
2837 | ||
1fd3172d | 2838 | while (!char_quoted (pos, pos_byte) |
195d1361 | 2839 | /* Previous statement updates syntax table. */ |
b7dbcc19 | 2840 | && ((c = FETCH_CHAR_AS_MULTIBYTE (pos_byte), SYNTAX (c) == Squote) |
93da5fff KH |
2841 | || SYNTAX_PREFIX (c))) |
2842 | { | |
1fd3172d RS |
2843 | opoint = pos; |
2844 | opoint_byte = pos_byte; | |
2845 | ||
2846 | if (pos + 1 > beg) | |
2847 | DEC_BOTH (pos, pos_byte); | |
93da5fff | 2848 | } |
8489eb67 | 2849 | |
6a140a74 | 2850 | SET_PT_BOTH (opoint, opoint_byte); |
8489eb67 RS |
2851 | |
2852 | return Qnil; | |
2853 | } | |
2854 | \f | |
6a140a74 | 2855 | /* Parse forward from FROM / FROM_BYTE to END, |
e5d4f4dc RS |
2856 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
2857 | and return a description of the state of the parse at END. | |
c81a3712 | 2858 | If STOPBEFORE is nonzero, stop at the start of an atom. |
644ea4df RS |
2859 | If COMMENTSTOP is 1, stop at the start of a comment. |
2860 | If COMMENTSTOP is -1, stop at the start or end of a comment, | |
2861 | after the beginning of a string, or after the end of a string. */ | |
8489eb67 | 2862 | |
340f92b5 | 2863 | static void |
6a140a74 | 2864 | scan_sexps_forward (stateptr, from, from_byte, end, targetdepth, |
c81a3712 | 2865 | stopbefore, oldstate, commentstop) |
e5d4f4dc | 2866 | struct lisp_parse_state *stateptr; |
8e2911c2 AS |
2867 | register EMACS_INT from; |
2868 | EMACS_INT from_byte, end; | |
2869 | int targetdepth, stopbefore; | |
8489eb67 | 2870 | Lisp_Object oldstate; |
c81a3712 | 2871 | int commentstop; |
8489eb67 RS |
2872 | { |
2873 | struct lisp_parse_state state; | |
2874 | ||
2875 | register enum syntaxcode code; | |
95ff8dfc RS |
2876 | int c1; |
2877 | int comnested; | |
8489eb67 RS |
2878 | struct level { int last, prev; }; |
2879 | struct level levelstart[100]; | |
2880 | register struct level *curlevel = levelstart; | |
2881 | struct level *endlevel = levelstart + 100; | |
8489eb67 RS |
2882 | register int depth; /* Paren depth of current scanning location. |
2883 | level - levelstart equals this except | |
2884 | when the depth becomes negative. */ | |
2885 | int mindepth; /* Lowest DEPTH value seen. */ | |
2886 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
2887 | Lisp_Object tem; | |
8e2911c2 AS |
2888 | EMACS_INT prev_from; /* Keep one character before FROM. */ |
2889 | EMACS_INT prev_from_byte; | |
1fd3172d | 2890 | int prev_from_syntax; |
195d1361 RS |
2891 | int boundary_stop = commentstop == -1; |
2892 | int nofence; | |
95ff8dfc | 2893 | int found; |
60c86a83 | 2894 | EMACS_INT out_bytepos, out_charpos; |
7c7ca3d2 | 2895 | int temp; |
93da5fff KH |
2896 | |
2897 | prev_from = from; | |
6a140a74 RS |
2898 | prev_from_byte = from_byte; |
2899 | if (from != BEGV) | |
2900 | DEC_BOTH (prev_from, prev_from_byte); | |
93da5fff KH |
2901 | |
2902 | /* Use this macro instead of `from++'. */ | |
6a140a74 RS |
2903 | #define INC_FROM \ |
2904 | do { prev_from = from; \ | |
2905 | prev_from_byte = from_byte; \ | |
327719ee | 2906 | temp = FETCH_CHAR_AS_MULTIBYTE (prev_from_byte); \ |
ab229fdd | 2907 | prev_from_syntax = SYNTAX_WITH_FLAGS (temp); \ |
ef316cf0 | 2908 | INC_BOTH (from, from_byte); \ |
3ceb4629 SM |
2909 | if (from < end) \ |
2910 | UPDATE_SYNTAX_TABLE_FORWARD (from); \ | |
6a140a74 | 2911 | } while (0) |
8489eb67 RS |
2912 | |
2913 | immediate_quit = 1; | |
2914 | QUIT; | |
2915 | ||
265a9e55 | 2916 | if (NILP (oldstate)) |
8489eb67 RS |
2917 | { |
2918 | depth = 0; | |
2919 | state.instring = -1; | |
2920 | state.incomment = 0; | |
195d1361 RS |
2921 | state.comstyle = 0; /* comment style a by default. */ |
2922 | state.comstr_start = -1; /* no comment/string seen. */ | |
8489eb67 RS |
2923 | } |
2924 | else | |
2925 | { | |
2926 | tem = Fcar (oldstate); | |
265a9e55 | 2927 | if (!NILP (tem)) |
8489eb67 RS |
2928 | depth = XINT (tem); |
2929 | else | |
2930 | depth = 0; | |
2931 | ||
2932 | oldstate = Fcdr (oldstate); | |
2933 | oldstate = Fcdr (oldstate); | |
2934 | oldstate = Fcdr (oldstate); | |
2935 | tem = Fcar (oldstate); | |
195d1361 | 2936 | /* Check whether we are inside string_fence-style string: */ |
7d0393cf JB |
2937 | state.instring = (!NILP (tem) |
2938 | ? (INTEGERP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
e76f1c44 | 2939 | : -1); |
8489eb67 RS |
2940 | |
2941 | oldstate = Fcdr (oldstate); | |
2942 | tem = Fcar (oldstate); | |
e76f1c44 GM |
2943 | state.incomment = (!NILP (tem) |
2944 | ? (INTEGERP (tem) ? XINT (tem) : -1) | |
95ff8dfc | 2945 | : 0); |
8489eb67 RS |
2946 | |
2947 | oldstate = Fcdr (oldstate); | |
2948 | tem = Fcar (oldstate); | |
265a9e55 | 2949 | start_quoted = !NILP (tem); |
e5d4f4dc | 2950 | |
95ff8dfc | 2951 | /* if the eighth element of the list is nil, we are in comment |
195d1361 RS |
2952 | style a. If it is non-nil, we are in comment style b */ |
2953 | oldstate = Fcdr (oldstate); | |
e5d4f4dc | 2954 | oldstate = Fcdr (oldstate); |
195d1361 | 2955 | tem = Fcar (oldstate); |
7d0393cf | 2956 | state.comstyle = NILP (tem) ? 0 : (EQ (tem, Qsyntax_table) |
e76f1c44 | 2957 | ? ST_COMMENT_STYLE : 1); |
195d1361 | 2958 | |
e5d4f4dc | 2959 | oldstate = Fcdr (oldstate); |
e5d4f4dc | 2960 | tem = Fcar (oldstate); |
195d1361 | 2961 | state.comstr_start = NILP (tem) ? -1 : XINT (tem) ; |
1a102a58 RS |
2962 | oldstate = Fcdr (oldstate); |
2963 | tem = Fcar (oldstate); | |
2964 | while (!NILP (tem)) /* >= second enclosing sexps. */ | |
2965 | { | |
2966 | /* curlevel++->last ran into compiler bug on Apollo */ | |
2967 | curlevel->last = XINT (Fcar (tem)); | |
2968 | if (++curlevel == endlevel) | |
02010917 | 2969 | curlevel--; /* error ("Nesting too deep for parser"); */ |
1a102a58 RS |
2970 | curlevel->prev = -1; |
2971 | curlevel->last = -1; | |
2972 | tem = Fcdr (tem); | |
2973 | } | |
8489eb67 RS |
2974 | } |
2975 | state.quoted = 0; | |
2976 | mindepth = depth; | |
2977 | ||
2978 | curlevel->prev = -1; | |
2979 | curlevel->last = -1; | |
2980 | ||
326b283b | 2981 | SETUP_SYNTAX_TABLE (prev_from, 1); |
ab229fdd AS |
2982 | temp = FETCH_CHAR (prev_from_byte); |
2983 | prev_from_syntax = SYNTAX_WITH_FLAGS (temp); | |
3ceb4629 | 2984 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
326b283b | 2985 | |
195d1361 | 2986 | /* Enter the loop at a place appropriate for initial state. */ |
8489eb67 | 2987 | |
326b283b RS |
2988 | if (state.incomment) |
2989 | goto startincomment; | |
8489eb67 RS |
2990 | if (state.instring >= 0) |
2991 | { | |
195d1361 | 2992 | nofence = state.instring != ST_STRING_STYLE; |
326b283b RS |
2993 | if (start_quoted) |
2994 | goto startquotedinstring; | |
8489eb67 RS |
2995 | goto startinstring; |
2996 | } | |
326b283b RS |
2997 | else if (start_quoted) |
2998 | goto startquoted; | |
1fd3172d | 2999 | |
8489eb67 RS |
3000 | while (from < end) |
3001 | { | |
93da5fff | 3002 | INC_FROM; |
1fd3172d | 3003 | code = prev_from_syntax & 0xff; |
4c920633 | 3004 | |
c5d4b96f SM |
3005 | if (from < end |
3006 | && SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax) | |
3007 | && (c1 = FETCH_CHAR (from_byte), | |
3008 | SYNTAX_COMSTART_SECOND (c1))) | |
3009 | /* Duplicate code to avoid a complex if-expression | |
3010 | which causes trouble for the SGI compiler. */ | |
95ff8dfc | 3011 | { |
c5d4b96f SM |
3012 | /* Record the comment style we have entered so that only |
3013 | the comment-end sequence of the same style actually | |
3014 | terminates the comment section. */ | |
3015 | state.comstyle = SYNTAX_COMMENT_STYLE (c1); | |
3016 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax); | |
3017 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
3018 | state.incomment = comnested ? 1 : -1; | |
95ff8dfc | 3019 | state.comstr_start = prev_from; |
c5d4b96f SM |
3020 | INC_FROM; |
3021 | code = Scomment; | |
95ff8dfc | 3022 | } |
4c920633 | 3023 | else if (code == Scomment_fence) |
e5d4f4dc RS |
3024 | { |
3025 | /* Record the comment style we have entered so that only | |
3026 | the comment-end sequence of the same style actually | |
3027 | terminates the comment section. */ | |
95ff8dfc RS |
3028 | state.comstyle = ST_COMMENT_STYLE; |
3029 | state.incomment = -1; | |
195d1361 | 3030 | state.comstr_start = prev_from; |
e5d4f4dc | 3031 | code = Scomment; |
e5d4f4dc | 3032 | } |
c5d4b96f SM |
3033 | else if (code == Scomment) |
3034 | { | |
3035 | state.comstyle = SYNTAX_FLAGS_COMMENT_STYLE (prev_from_syntax); | |
3036 | state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ? | |
3037 | 1 : -1); | |
3038 | state.comstr_start = prev_from; | |
3039 | } | |
e5d4f4dc | 3040 | |
1fd3172d | 3041 | if (SYNTAX_FLAGS_PREFIX (prev_from_syntax)) |
8489eb67 | 3042 | continue; |
0220c518 | 3043 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
3044 | { |
3045 | case Sescape: | |
3046 | case Scharquote: | |
3047 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 3048 | curlevel->last = prev_from; |
8489eb67 RS |
3049 | startquoted: |
3050 | if (from == end) goto endquoted; | |
93da5fff | 3051 | INC_FROM; |
8489eb67 RS |
3052 | goto symstarted; |
3053 | /* treat following character as a word constituent */ | |
3054 | case Sword: | |
3055 | case Ssymbol: | |
3056 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 3057 | curlevel->last = prev_from; |
8489eb67 RS |
3058 | symstarted: |
3059 | while (from < end) | |
3060 | { | |
7c7ca3d2 | 3061 | /* Some compilers can't handle this inside the switch. */ |
327719ee | 3062 | temp = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
ab229fdd | 3063 | temp = SYNTAX (temp); |
7c7ca3d2 | 3064 | switch (temp) |
8489eb67 RS |
3065 | { |
3066 | case Scharquote: | |
3067 | case Sescape: | |
93da5fff | 3068 | INC_FROM; |
8489eb67 RS |
3069 | if (from == end) goto endquoted; |
3070 | break; | |
3071 | case Sword: | |
3072 | case Ssymbol: | |
3073 | case Squote: | |
3074 | break; | |
3075 | default: | |
3076 | goto symdone; | |
3077 | } | |
93da5fff | 3078 | INC_FROM; |
8489eb67 RS |
3079 | } |
3080 | symdone: | |
3081 | curlevel->prev = curlevel->last; | |
3082 | break; | |
3083 | ||
240c43e8 | 3084 | case Scomment_fence: /* Can't happen because it's handled above. */ |
8489eb67 | 3085 | case Scomment: |
195d1361 | 3086 | if (commentstop || boundary_stop) goto done; |
d355bd8a SM |
3087 | startincomment: |
3088 | /* The (from == BEGV) test was to enter the loop in the middle so | |
95ff8dfc | 3089 | that we find a 2-char comment ender even if we start in the |
e6365855 | 3090 | middle of it. We don't want to do that if we're just at the |
d355bd8a | 3091 | beginning of the comment (think of (*) ... (*)). */ |
95ff8dfc RS |
3092 | found = forw_comment (from, from_byte, end, |
3093 | state.incomment, state.comstyle, | |
e6365855 SM |
3094 | (from == BEGV || from < state.comstr_start + 3) |
3095 | ? 0 : prev_from_syntax, | |
95ff8dfc RS |
3096 | &out_charpos, &out_bytepos, &state.incomment); |
3097 | from = out_charpos; from_byte = out_bytepos; | |
3098 | /* Beware! prev_from and friends are invalid now. | |
3099 | Luckily, the `done' doesn't use them and the INC_FROM | |
3100 | sets them to a sane value without looking at them. */ | |
3101 | if (!found) goto done; | |
d355bd8a | 3102 | INC_FROM; |
8489eb67 | 3103 | state.incomment = 0; |
e5d4f4dc | 3104 | state.comstyle = 0; /* reset the comment style */ |
195d1361 | 3105 | if (boundary_stop) goto done; |
8489eb67 RS |
3106 | break; |
3107 | ||
3108 | case Sopen: | |
3109 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
3110 | depth++; | |
3111 | /* curlevel++->last ran into compiler bug on Apollo */ | |
93da5fff | 3112 | curlevel->last = prev_from; |
8489eb67 | 3113 | if (++curlevel == endlevel) |
02010917 | 3114 | curlevel--; /* error ("Nesting too deep for parser"); */ |
8489eb67 RS |
3115 | curlevel->prev = -1; |
3116 | curlevel->last = -1; | |
30844415 | 3117 | if (targetdepth == depth) goto done; |
8489eb67 RS |
3118 | break; |
3119 | ||
3120 | case Sclose: | |
3121 | depth--; | |
3122 | if (depth < mindepth) | |
3123 | mindepth = depth; | |
3124 | if (curlevel != levelstart) | |
3125 | curlevel--; | |
3126 | curlevel->prev = curlevel->last; | |
30844415 | 3127 | if (targetdepth == depth) goto done; |
8489eb67 RS |
3128 | break; |
3129 | ||
3130 | case Sstring: | |
195d1361 RS |
3131 | case Sstring_fence: |
3132 | state.comstr_start = from - 1; | |
8489eb67 | 3133 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
93da5fff | 3134 | curlevel->last = prev_from; |
7d0393cf | 3135 | state.instring = (code == Sstring |
b7dbcc19 | 3136 | ? (FETCH_CHAR_AS_MULTIBYTE (prev_from_byte)) |
195d1361 RS |
3137 | : ST_STRING_STYLE); |
3138 | if (boundary_stop) goto done; | |
8489eb67 | 3139 | startinstring: |
195d1361 | 3140 | { |
644ea4df | 3141 | nofence = state.instring != ST_STRING_STYLE; |
7d0393cf | 3142 | |
644ea4df RS |
3143 | while (1) |
3144 | { | |
3145 | int c; | |
195d1361 | 3146 | |
644ea4df | 3147 | if (from >= end) goto done; |
b7dbcc19 | 3148 | c = FETCH_CHAR_AS_MULTIBYTE (from_byte); |
7c7ca3d2 RS |
3149 | /* Some compilers can't handle this inside the switch. */ |
3150 | temp = SYNTAX (c); | |
ccf89641 KH |
3151 | |
3152 | /* Check TEMP here so that if the char has | |
3153 | a syntax-table property which says it is NOT | |
3154 | a string character, it does not end the string. */ | |
3155 | if (nofence && c == state.instring && temp == Sstring) | |
3156 | break; | |
3157 | ||
7c7ca3d2 | 3158 | switch (temp) |
644ea4df RS |
3159 | { |
3160 | case Sstring_fence: | |
3161 | if (!nofence) goto string_end; | |
3162 | break; | |
3163 | case Scharquote: | |
3164 | case Sescape: | |
3165 | INC_FROM; | |
3166 | startquotedinstring: | |
3167 | if (from >= end) goto endquoted; | |
195d1361 | 3168 | } |
644ea4df RS |
3169 | INC_FROM; |
3170 | } | |
195d1361 RS |
3171 | } |
3172 | string_end: | |
8489eb67 RS |
3173 | state.instring = -1; |
3174 | curlevel->prev = curlevel->last; | |
93da5fff | 3175 | INC_FROM; |
195d1361 | 3176 | if (boundary_stop) goto done; |
8489eb67 RS |
3177 | break; |
3178 | ||
3179 | case Smath: | |
240c43e8 SM |
3180 | /* FIXME: We should do something with it. */ |
3181 | break; | |
3182 | default: | |
3183 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
8489eb67 RS |
3184 | break; |
3185 | } | |
3186 | } | |
3187 | goto done; | |
3188 | ||
3189 | stop: /* Here if stopping before start of sexp. */ | |
93da5fff | 3190 | from = prev_from; /* We have just fetched the char that starts it; */ |
8489eb67 RS |
3191 | goto done; /* but return the position before it. */ |
3192 | ||
3193 | endquoted: | |
3194 | state.quoted = 1; | |
3195 | done: | |
3196 | state.depth = depth; | |
3197 | state.mindepth = mindepth; | |
3198 | state.thislevelstart = curlevel->prev; | |
3199 | state.prevlevelstart | |
3200 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
3201 | state.location = from; | |
1a102a58 RS |
3202 | state.levelstarts = Qnil; |
3203 | while (--curlevel >= levelstart) | |
3204 | state.levelstarts = Fcons (make_number (curlevel->last), | |
3205 | state.levelstarts); | |
8489eb67 RS |
3206 | immediate_quit = 0; |
3207 | ||
e5d4f4dc | 3208 | *stateptr = state; |
8489eb67 RS |
3209 | } |
3210 | ||
c81a3712 | 3211 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
fdb82f93 PJ |
3212 | doc: /* Parse Lisp syntax starting at FROM until TO; return status of parse at TO. |
3213 | Parsing stops at TO or when certain criteria are met; | |
3214 | point is set to where parsing stops. | |
3215 | If fifth arg OLDSTATE is omitted or nil, | |
3216 | parsing assumes that FROM is the beginning of a function. | |
0e6228bc | 3217 | Value is a list of elements describing final state of parsing: |
fdb82f93 PJ |
3218 | 0. depth in parens. |
3219 | 1. character address of start of innermost containing list; nil if none. | |
3220 | 2. character address of start of last complete sexp terminated. | |
3221 | 3. non-nil if inside a string. | |
3222 | (it is the character that will terminate the string, | |
3223 | or t if the string should be terminated by a generic string delimiter.) | |
7d0393cf | 3224 | 4. nil if outside a comment, t if inside a non-nestable comment, |
fdb82f93 PJ |
3225 | else an integer (the current comment nesting). |
3226 | 5. t if following a quote character. | |
3227 | 6. the minimum paren-depth encountered during this scan. | |
3228 | 7. t if in a comment of style b; symbol `syntax-table' if the comment | |
3229 | should be terminated by a generic comment delimiter. | |
3230 | 8. character address of start of comment or string; nil if not in one. | |
3231 | 9. Intermediate data for continuation of parsing (subject to change). | |
3232 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth | |
3233 | in parentheses becomes equal to TARGETDEPTH. | |
3234 | Fourth arg STOPBEFORE non-nil means stop when come to | |
3235 | any character that starts a sexp. | |
0e6228bc | 3236 | Fifth arg OLDSTATE is a list like what this function returns. |
fdb82f93 | 3237 | It is used to initialize the state of the parse. Elements number 1, 2, 6 |
43726c05 | 3238 | and 8 are ignored. |
fdb82f93 PJ |
3239 | Sixth arg COMMENTSTOP non-nil means stop at the start of a comment. |
3240 | If it is symbol `syntax-table', stop after the start of a comment or a | |
3241 | string, or after end of a comment or a string. */) | |
5842a27b | 3242 | (Lisp_Object from, Lisp_Object to, Lisp_Object targetdepth, Lisp_Object stopbefore, Lisp_Object oldstate, Lisp_Object commentstop) |
8489eb67 RS |
3243 | { |
3244 | struct lisp_parse_state state; | |
3245 | int target; | |
3246 | ||
265a9e55 | 3247 | if (!NILP (targetdepth)) |
8489eb67 | 3248 | { |
b7826503 | 3249 | CHECK_NUMBER (targetdepth); |
8489eb67 RS |
3250 | target = XINT (targetdepth); |
3251 | } | |
3252 | else | |
3253 | target = -100000; /* We won't reach this depth */ | |
3254 | ||
3255 | validate_region (&from, &to); | |
6a140a74 RS |
3256 | scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)), |
3257 | XINT (to), | |
c81a3712 | 3258 | target, !NILP (stopbefore), oldstate, |
7d0393cf | 3259 | (NILP (commentstop) |
195d1361 | 3260 | ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); |
8489eb67 RS |
3261 | |
3262 | SET_PT (state.location); | |
7d0393cf | 3263 | |
8489eb67 RS |
3264 | return Fcons (make_number (state.depth), |
3265 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
3266 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
7d0393cf JB |
3267 | Fcons (state.instring >= 0 |
3268 | ? (state.instring == ST_STRING_STYLE | |
195d1361 | 3269 | ? Qt : make_number (state.instring)) : Qnil, |
95ff8dfc RS |
3270 | Fcons (state.incomment < 0 ? Qt : |
3271 | (state.incomment == 0 ? Qnil : | |
3272 | make_number (state.incomment)), | |
8489eb67 | 3273 | Fcons (state.quoted ? Qt : Qnil, |
bff37d2a | 3274 | Fcons (make_number (state.mindepth), |
7d0393cf | 3275 | Fcons ((state.comstyle |
bff37d2a RS |
3276 | ? (state.comstyle == ST_COMMENT_STYLE |
3277 | ? Qsyntax_table : Qt) : | |
3278 | Qnil), | |
0beaf54f DL |
3279 | Fcons (((state.incomment |
3280 | || (state.instring >= 0)) | |
bff37d2a RS |
3281 | ? make_number (state.comstr_start) |
3282 | : Qnil), | |
1a102a58 | 3283 | Fcons (state.levelstarts, Qnil)))))))))); |
8489eb67 RS |
3284 | } |
3285 | \f | |
dfcf069d | 3286 | void |
971de7fb | 3287 | init_syntax_once (void) |
8489eb67 | 3288 | { |
78f9a1f7 | 3289 | register int i, c; |
8ea151b2 | 3290 | Lisp_Object temp; |
8489eb67 | 3291 | |
5ebaddf5 | 3292 | /* This has to be done here, before we call Fmake_char_table. */ |
d67b4f80 | 3293 | Qsyntax_table = intern_c_string ("syntax-table"); |
5ebaddf5 RS |
3294 | staticpro (&Qsyntax_table); |
3295 | ||
d67b4f80 | 3296 | /* Intern_C_String this now in case it isn't already done. |
5ebaddf5 RS |
3297 | Setting this variable twice is harmless. |
3298 | But don't staticpro it here--that is done in alloc.c. */ | |
d67b4f80 | 3299 | Qchar_table_extra_slots = intern_c_string ("char-table-extra-slots"); |
5ebaddf5 | 3300 | |
93da5fff | 3301 | /* Create objects which can be shared among syntax tables. */ |
42ebfa31 | 3302 | Vsyntax_code_object = Fmake_vector (make_number (Smax), Qnil); |
93da5fff KH |
3303 | for (i = 0; i < XVECTOR (Vsyntax_code_object)->size; i++) |
3304 | XVECTOR (Vsyntax_code_object)->contents[i] | |
3305 | = Fcons (make_number (i), Qnil); | |
3306 | ||
5ebaddf5 RS |
3307 | /* Now we are ready to set up this property, so we can |
3308 | create syntax tables. */ | |
3309 | Fput (Qsyntax_table, Qchar_table_extra_slots, make_number (0)); | |
3310 | ||
93da5fff | 3311 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; |
8489eb67 | 3312 | |
5ebaddf5 | 3313 | Vstandard_syntax_table = Fmake_char_table (Qsyntax_table, temp); |
8489eb67 | 3314 | |
aa7b08b4 RS |
3315 | /* Control characters should not be whitespace. */ |
3316 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; | |
3317 | for (i = 0; i <= ' ' - 1; i++) | |
3318 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); | |
3319 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 0177, temp); | |
3320 | ||
3321 | /* Except that a few really are whitespace. */ | |
3322 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; | |
3323 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ' ', temp); | |
3324 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\t', temp); | |
3325 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\n', temp); | |
3326 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 015, temp); | |
3327 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, 014, temp); | |
3328 | ||
93da5fff | 3329 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; |
8489eb67 | 3330 | for (i = 'a'; i <= 'z'; i++) |
8ea151b2 | 3331 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3332 | for (i = 'A'; i <= 'Z'; i++) |
8ea151b2 | 3333 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3334 | for (i = '0'; i <= '9'; i++) |
8ea151b2 RS |
3335 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
3336 | ||
3337 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '$', temp); | |
3338 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '%', temp); | |
3339 | ||
3340 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '(', | |
3341 | Fcons (make_number (Sopen), make_number (')'))); | |
3342 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ')', | |
3343 | Fcons (make_number (Sclose), make_number ('('))); | |
3344 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '[', | |
3345 | Fcons (make_number (Sopen), make_number (']'))); | |
3346 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ']', | |
3347 | Fcons (make_number (Sclose), make_number ('['))); | |
3348 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '{', | |
3349 | Fcons (make_number (Sopen), make_number ('}'))); | |
3350 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '}', | |
3351 | Fcons (make_number (Sclose), make_number ('{'))); | |
3352 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '"', | |
3353 | Fcons (make_number ((int) Sstring), Qnil)); | |
3354 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\\', | |
3355 | Fcons (make_number ((int) Sescape), Qnil)); | |
3356 | ||
93da5fff | 3357 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Ssymbol]; |
8489eb67 | 3358 | for (i = 0; i < 10; i++) |
78f9a1f7 KH |
3359 | { |
3360 | c = "_-+*/&|<>="[i]; | |
3361 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3362 | } | |
8489eb67 | 3363 | |
93da5fff | 3364 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; |
8489eb67 | 3365 | for (i = 0; i < 12; i++) |
78f9a1f7 KH |
3366 | { |
3367 | c = ".,;:?!#@~^'`"[i]; | |
3368 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3369 | } | |
bd25db08 KH |
3370 | |
3371 | /* All multibyte characters have syntax `word' by default. */ | |
3372 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; | |
5c7b02ab | 3373 | char_table_set_range (Vstandard_syntax_table, 0x80, MAX_CHAR, temp); |
8489eb67 RS |
3374 | } |
3375 | ||
dfcf069d | 3376 | void |
971de7fb | 3377 | syms_of_syntax (void) |
8489eb67 | 3378 | { |
d67b4f80 | 3379 | Qsyntax_table_p = intern_c_string ("syntax-table-p"); |
8489eb67 RS |
3380 | staticpro (&Qsyntax_table_p); |
3381 | ||
93da5fff KH |
3382 | staticpro (&Vsyntax_code_object); |
3383 | ||
a2994c46 KS |
3384 | staticpro (&gl_state.object); |
3385 | staticpro (&gl_state.global_code); | |
3386 | staticpro (&gl_state.current_syntax_table); | |
3387 | staticpro (&gl_state.old_prop); | |
3388 | ||
3389 | /* Defined in regex.c */ | |
3390 | staticpro (&re_match_object); | |
3391 | ||
d67b4f80 | 3392 | Qscan_error = intern_c_string ("scan-error"); |
7bf5e9e4 RS |
3393 | staticpro (&Qscan_error); |
3394 | Fput (Qscan_error, Qerror_conditions, | |
d67b4f80 | 3395 | pure_cons (Qscan_error, pure_cons (Qerror, Qnil))); |
7bf5e9e4 | 3396 | Fput (Qscan_error, Qerror_message, |
d67b4f80 | 3397 | make_pure_c_string ("Scan error")); |
7bf5e9e4 | 3398 | |
8489eb67 | 3399 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, |
fdb82f93 | 3400 | doc: /* Non-nil means `forward-sexp', etc., should treat comments as whitespace. */); |
8489eb67 | 3401 | |
195d1361 | 3402 | DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties, |
fdb82f93 PJ |
3403 | doc: /* Non-nil means `forward-sexp', etc., obey `syntax-table' property. |
3404 | Otherwise, that text property is simply ignored. | |
3405 | See the info node `(elisp)Syntax Properties' for a description of the | |
3406 | `syntax-table' property. */); | |
195d1361 | 3407 | |
8489eb67 RS |
3408 | words_include_escapes = 0; |
3409 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
fdb82f93 | 3410 | doc: /* Non-nil means `forward-word', etc., should treat escape chars part of words. */); |
8489eb67 | 3411 | |
bd25db08 | 3412 | DEFVAR_BOOL ("multibyte-syntax-as-symbol", &multibyte_syntax_as_symbol, |
fdb82f93 | 3413 | doc: /* Non-nil means `scan-sexps' treats all multibyte characters as symbol. */); |
bd25db08 KH |
3414 | multibyte_syntax_as_symbol = 0; |
3415 | ||
f4ed767f GM |
3416 | DEFVAR_BOOL ("open-paren-in-column-0-is-defun-start", |
3417 | &open_paren_in_column_0_is_defun_start, | |
b222e415 | 3418 | doc: /* *Non-nil means an open paren in column 0 denotes the start of a defun. */); |
f4ed767f GM |
3419 | open_paren_in_column_0_is_defun_start = 1; |
3420 | ||
8f924df7 KH |
3421 | |
3422 | DEFVAR_LISP ("find-word-boundary-function-table", | |
3423 | &Vfind_word_boundary_function_table, | |
869bb237 | 3424 | doc: /* |
8f924df7 | 3425 | Char table of functions to search for the word boundary. |
869bb237 KH |
3426 | Each function is called with two arguments; POS and LIMIT. |
3427 | POS and LIMIT are character positions in the current buffer. | |
3428 | ||
3429 | If POS is less than LIMIT, POS is at the first character of a word, | |
3430 | and the return value of a function is a position after the last | |
3431 | character of that word. | |
3432 | ||
3433 | If POS is not less than LIMIT, POS is at the last character of a word, | |
3434 | and the return value of a function is a position at the first | |
3435 | character of that word. | |
3436 | ||
3437 | In both cases, LIMIT bounds the search. */); | |
8f924df7 | 3438 | Vfind_word_boundary_function_table = Fmake_char_table (Qnil, Qnil); |
869bb237 | 3439 | |
8489eb67 RS |
3440 | defsubr (&Ssyntax_table_p); |
3441 | defsubr (&Ssyntax_table); | |
3442 | defsubr (&Sstandard_syntax_table); | |
3443 | defsubr (&Scopy_syntax_table); | |
3444 | defsubr (&Sset_syntax_table); | |
3445 | defsubr (&Schar_syntax); | |
beefa22e | 3446 | defsubr (&Smatching_paren); |
c65adb44 | 3447 | defsubr (&Sstring_to_syntax); |
8489eb67 | 3448 | defsubr (&Smodify_syntax_entry); |
62abe9cb | 3449 | defsubr (&Sinternal_describe_syntax_value); |
8489eb67 RS |
3450 | |
3451 | defsubr (&Sforward_word); | |
3452 | ||
195d1361 RS |
3453 | defsubr (&Sskip_chars_forward); |
3454 | defsubr (&Sskip_chars_backward); | |
3455 | defsubr (&Sskip_syntax_forward); | |
3456 | defsubr (&Sskip_syntax_backward); | |
3457 | ||
b3cfe0c8 | 3458 | defsubr (&Sforward_comment); |
8489eb67 RS |
3459 | defsubr (&Sscan_lists); |
3460 | defsubr (&Sscan_sexps); | |
3461 | defsubr (&Sbackward_prefix_chars); | |
3462 | defsubr (&Sparse_partial_sexp); | |
3463 | } | |
839966f3 KH |
3464 | |
3465 | /* arch-tag: 3e297b9f-088e-4b64-8f4c-fb0b3443e412 | |
3466 | (do not change this comment) */ |