Commit | Line | Data |
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8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
b8855607 | 2 | Copyright (C) 1985, 87, 93, 94, 95, 97, 1998, 1999 Free Software Foundation, Inc. |
8489eb67 RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a4275ad1 | 8 | the Free Software Foundation; either version 2, or (at your option) |
8489eb67 RS |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
8489eb67 RS |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
8489eb67 RS |
23 | #include <ctype.h> |
24 | #include "lisp.h" | |
25 | #include "commands.h" | |
26 | #include "buffer.h" | |
93da5fff | 27 | #include "charset.h" |
e35f6ff7 | 28 | #include "keymap.h" |
195d1361 RS |
29 | |
30 | /* Make syntax table lookup grant data in gl_state. */ | |
31 | #define SYNTAX_ENTRY_VIA_PROPERTY | |
32 | ||
8489eb67 | 33 | #include "syntax.h" |
195d1361 RS |
34 | #include "intervals.h" |
35 | ||
36 | /* We use these constants in place for comment-style and | |
37 | string-ender-char to distinguish comments/strings started by | |
38 | comment_fence and string_fence codes. */ | |
39 | ||
40 | #define ST_COMMENT_STYLE (256 + 1) | |
41 | #define ST_STRING_STYLE (256 + 2) | |
93da5fff | 42 | #include "category.h" |
8489eb67 | 43 | |
7bf5e9e4 | 44 | Lisp_Object Qsyntax_table_p, Qsyntax_table, Qscan_error; |
8489eb67 RS |
45 | |
46 | int words_include_escapes; | |
195d1361 | 47 | int parse_sexp_lookup_properties; |
8489eb67 | 48 | |
bd25db08 KH |
49 | /* Nonzero means `scan-sexps' treat all multibyte characters as symbol. */ |
50 | int multibyte_syntax_as_symbol; | |
51 | ||
8ea151b2 RS |
52 | /* Used as a temporary in SYNTAX_ENTRY and other macros in syntax.h, |
53 | if not compiled with GCC. No need to mark it, since it is used | |
54 | only very temporarily. */ | |
55 | Lisp_Object syntax_temp; | |
56 | ||
f4ed767f GM |
57 | /* Non-zero means an open parenthesis in column 0 is always considered |
58 | to be the start of a defun. Zero means an open parenthesis in | |
59 | column 0 has no special meaning. */ | |
60 | ||
61 | int open_paren_in_column_0_is_defun_start; | |
62 | ||
e5d4f4dc RS |
63 | /* This is the internal form of the parse state used in parse-partial-sexp. */ |
64 | ||
65 | struct lisp_parse_state | |
66 | { | |
195d1361 RS |
67 | int depth; /* Depth at end of parsing. */ |
68 | int instring; /* -1 if not within string, else desired terminator. */ | |
95ff8dfc | 69 | int incomment; /* -1 if in unnestable comment else comment nesting */ |
195d1361 | 70 | int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */ |
e5d4f4dc RS |
71 | int quoted; /* Nonzero if just after an escape char at end of parsing */ |
72 | int thislevelstart; /* Char number of most recent start-of-expression at current level */ | |
73 | int prevlevelstart; /* Char number of start of containing expression */ | |
195d1361 | 74 | int location; /* Char number at which parsing stopped. */ |
e5d4f4dc | 75 | int mindepth; /* Minimum depth seen while scanning. */ |
195d1361 | 76 | int comstr_start; /* Position just after last comment/string starter. */ |
1a102a58 RS |
77 | Lisp_Object levelstarts; /* Char numbers of starts-of-expression |
78 | of levels (starting from outermost). */ | |
e5d4f4dc RS |
79 | }; |
80 | \f | |
37bef230 RS |
81 | /* These variables are a cache for finding the start of a defun. |
82 | find_start_pos is the place for which the defun start was found. | |
83 | find_start_value is the defun start position found for it. | |
6a140a74 | 84 | find_start_value_byte is the corresponding byte position. |
37bef230 RS |
85 | find_start_buffer is the buffer it was found in. |
86 | find_start_begv is the BEGV value when it was found. | |
87 | find_start_modiff is the value of MODIFF when it was found. */ | |
88 | ||
89 | static int find_start_pos; | |
90 | static int find_start_value; | |
6a140a74 | 91 | static int find_start_value_byte; |
37bef230 RS |
92 | static struct buffer *find_start_buffer; |
93 | static int find_start_begv; | |
94 | static int find_start_modiff; | |
6a140a74 RS |
95 | |
96 | ||
97 | static int find_defun_start P_ ((int, int)); | |
95ff8dfc | 98 | static int back_comment P_ ((int, int, int, int, int, int *, int *)); |
6a140a74 RS |
99 | static int char_quoted P_ ((int, int)); |
100 | static Lisp_Object skip_chars P_ ((int, int, Lisp_Object, Lisp_Object)); | |
101 | static Lisp_Object scan_lists P_ ((int, int, int, int)); | |
102 | static void scan_sexps_forward P_ ((struct lisp_parse_state *, | |
103 | int, int, int, int, | |
104 | int, Lisp_Object, int)); | |
195d1361 RS |
105 | \f |
106 | ||
107 | struct gl_state_s gl_state; /* Global state of syntax parser. */ | |
108 | ||
109 | INTERVAL interval_of (); | |
110 | #define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals | |
111 | to scan to property-change. */ | |
112 | ||
6a140a74 RS |
113 | /* Update gl_state to an appropriate interval which contains CHARPOS. The |
114 | sign of COUNT give the relative position of CHARPOS wrt the previously | |
195d1361 | 115 | valid interval. If INIT, only [be]_property fields of gl_state are |
6a140a74 | 116 | valid at start, the rest is filled basing on OBJECT. |
195d1361 | 117 | |
6a140a74 | 118 | `gl_state.*_i' are the intervals, and CHARPOS is further in the search |
195d1361 RS |
119 | direction than the intervals - or in an interval. We update the |
120 | current syntax-table basing on the property of this interval, and | |
6a140a74 | 121 | update the interval to start further than CHARPOS - or be |
195d1361 | 122 | NULL_INTERVAL. We also update lim_property to be the next value of |
6a140a74 | 123 | charpos to call this subroutine again - or be before/after the |
195d1361 RS |
124 | start/end of OBJECT. */ |
125 | ||
126 | void | |
6a140a74 RS |
127 | update_syntax_table (charpos, count, init, object) |
128 | int charpos, count, init; | |
195d1361 RS |
129 | Lisp_Object object; |
130 | { | |
131 | Lisp_Object tmp_table; | |
4ffe723b | 132 | int cnt = 0, invalidate = 1; |
195d1361 RS |
133 | INTERVAL i, oldi; |
134 | ||
135 | if (init) | |
136 | { | |
bb0de084 | 137 | gl_state.old_prop = Qnil; |
195d1361 RS |
138 | gl_state.start = gl_state.b_property; |
139 | gl_state.stop = gl_state.e_property; | |
bb0de084 SM |
140 | i = interval_of (charpos, object); |
141 | gl_state.backward_i = gl_state.forward_i = i; | |
195d1361 RS |
142 | invalidate = 0; |
143 | if (NULL_INTERVAL_P (i)) | |
144 | return; | |
f902a008 | 145 | /* interval_of updates only ->position of the return value, so |
d80f4cc7 | 146 | update the parents manually to speed up update_interval. */ |
bb0de084 | 147 | while (!NULL_PARENT (i)) |
d80f4cc7 RS |
148 | { |
149 | if (AM_RIGHT_CHILD (i)) | |
439d5cb4 | 150 | INTERVAL_PARENT (i)->position = i->position |
d80f4cc7 | 151 | - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */ |
439d5cb4 KR |
152 | - TOTAL_LENGTH (INTERVAL_PARENT (i)) |
153 | + LEFT_TOTAL_LENGTH (INTERVAL_PARENT (i)); | |
d80f4cc7 | 154 | else |
439d5cb4 | 155 | INTERVAL_PARENT (i)->position = i->position - LEFT_TOTAL_LENGTH (i) |
d80f4cc7 | 156 | + TOTAL_LENGTH (i); |
439d5cb4 | 157 | i = INTERVAL_PARENT (i); |
d80f4cc7 RS |
158 | } |
159 | i = gl_state.forward_i; | |
bb0de084 | 160 | gl_state.b_property = i->position - gl_state.offset; |
ee0cdb48 | 161 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
162 | goto update; |
163 | } | |
164 | oldi = i = count > 0 ? gl_state.forward_i : gl_state.backward_i; | |
165 | ||
423e705d | 166 | /* We are guaranteed to be called with CHARPOS either in i, |
6a140a74 | 167 | or further off. */ |
195d1361 RS |
168 | if (NULL_INTERVAL_P (i)) |
169 | error ("Error in syntax_table logic for to-the-end intervals"); | |
6a140a74 | 170 | else if (charpos < i->position) /* Move left. */ |
195d1361 RS |
171 | { |
172 | if (count > 0) | |
f902a008 | 173 | error ("Error in syntax_table logic for intervals <-"); |
195d1361 | 174 | /* Update the interval. */ |
6a140a74 | 175 | i = update_interval (i, charpos); |
bb0de084 | 176 | if (INTERVAL_LAST_POS (i) != gl_state.b_property) |
195d1361 RS |
177 | { |
178 | invalidate = 0; | |
195d1361 | 179 | gl_state.forward_i = i; |
ee0cdb48 | 180 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 | 181 | } |
423e705d | 182 | } |
6a140a74 | 183 | else if (charpos >= INTERVAL_LAST_POS (i)) /* Move right. */ |
195d1361 RS |
184 | { |
185 | if (count < 0) | |
f902a008 | 186 | error ("Error in syntax_table logic for intervals ->"); |
195d1361 | 187 | /* Update the interval. */ |
6a140a74 | 188 | i = update_interval (i, charpos); |
bb0de084 | 189 | if (i->position != gl_state.e_property) |
195d1361 RS |
190 | { |
191 | invalidate = 0; | |
195d1361 | 192 | gl_state.backward_i = i; |
bb0de084 | 193 | gl_state.b_property = i->position - gl_state.offset; |
195d1361 RS |
194 | } |
195 | } | |
195d1361 RS |
196 | |
197 | update: | |
198 | tmp_table = textget (i->plist, Qsyntax_table); | |
199 | ||
200 | if (invalidate) | |
201 | invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */ | |
7d0393cf | 202 | |
423e705d SM |
203 | if (invalidate) /* Did not get to adjacent interval. */ |
204 | { /* with the same table => */ | |
205 | /* invalidate the old range. */ | |
195d1361 RS |
206 | if (count > 0) |
207 | { | |
208 | gl_state.backward_i = i; | |
bb0de084 SM |
209 | gl_state.b_property = i->position - gl_state.offset; |
210 | } | |
211 | else | |
195d1361 | 212 | { |
bb0de084 | 213 | gl_state.forward_i = i; |
ee0cdb48 | 214 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
215 | } |
216 | } | |
37bef230 | 217 | |
bb0de084 | 218 | if (!EQ (tmp_table, gl_state.old_prop)) |
195d1361 | 219 | { |
bb0de084 SM |
220 | gl_state.current_syntax_table = tmp_table; |
221 | gl_state.old_prop = tmp_table; | |
222 | if (EQ (Fsyntax_table_p (tmp_table), Qt)) | |
223 | { | |
224 | gl_state.use_global = 0; | |
7d0393cf | 225 | } |
bb0de084 SM |
226 | else if (CONSP (tmp_table)) |
227 | { | |
228 | gl_state.use_global = 1; | |
229 | gl_state.global_code = tmp_table; | |
230 | } | |
7d0393cf | 231 | else |
bb0de084 SM |
232 | { |
233 | gl_state.use_global = 0; | |
234 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
235 | } | |
195d1361 RS |
236 | } |
237 | ||
238 | while (!NULL_INTERVAL_P (i)) | |
239 | { | |
240 | if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table))) | |
241 | { | |
242 | if (count > 0) | |
bb0de084 SM |
243 | { |
244 | gl_state.e_property = i->position - gl_state.offset; | |
245 | gl_state.forward_i = i; | |
246 | } | |
247 | else | |
248 | { | |
249 | gl_state.b_property = i->position + LENGTH (i) - gl_state.offset; | |
250 | gl_state.backward_i = i; | |
251 | } | |
252 | return; | |
195d1361 | 253 | } |
7d0393cf | 254 | else if (cnt == INTERVALS_AT_ONCE) |
195d1361 RS |
255 | { |
256 | if (count > 0) | |
bb0de084 SM |
257 | { |
258 | gl_state.e_property = i->position + LENGTH (i) - gl_state.offset; | |
259 | gl_state.forward_i = i; | |
260 | } | |
261 | else | |
262 | { | |
263 | gl_state.b_property = i->position - gl_state.offset; | |
264 | gl_state.backward_i = i; | |
265 | } | |
266 | return; | |
195d1361 RS |
267 | } |
268 | cnt++; | |
269 | i = count > 0 ? next_interval (i) : previous_interval (i); | |
270 | } | |
bb0de084 SM |
271 | eassert (NULL_INTERVAL_P (i)); /* This property goes to the end. */ |
272 | if (count > 0) | |
273 | gl_state.e_property = gl_state.stop; | |
274 | else | |
275 | gl_state.b_property = gl_state.start; | |
195d1361 RS |
276 | } |
277 | \f | |
6a140a74 RS |
278 | /* Returns TRUE if char at CHARPOS is quoted. |
279 | Global syntax-table data should be set up already to be good at CHARPOS | |
280 | or after. On return global syntax data is good for lookup at CHARPOS. */ | |
195d1361 RS |
281 | |
282 | static int | |
6a140a74 RS |
283 | char_quoted (charpos, bytepos) |
284 | register int charpos, bytepos; | |
195d1361 RS |
285 | { |
286 | register enum syntaxcode code; | |
287 | register int beg = BEGV; | |
288 | register int quoted = 0; | |
6a140a74 RS |
289 | int orig = charpos; |
290 | ||
291 | DEC_BOTH (charpos, bytepos); | |
195d1361 | 292 | |
6a140a74 | 293 | while (bytepos >= beg) |
195d1361 | 294 | { |
6a140a74 RS |
295 | UPDATE_SYNTAX_TABLE_BACKWARD (charpos); |
296 | code = SYNTAX (FETCH_CHAR (bytepos)); | |
297 | if (! (code == Scharquote || code == Sescape)) | |
298 | break; | |
299 | ||
300 | DEC_BOTH (charpos, bytepos); | |
301 | quoted = !quoted; | |
195d1361 | 302 | } |
6a140a74 RS |
303 | |
304 | UPDATE_SYNTAX_TABLE (orig); | |
195d1361 RS |
305 | return quoted; |
306 | } | |
6a140a74 RS |
307 | |
308 | /* Return the bytepos one character after BYTEPOS. | |
309 | We assume that BYTEPOS is not at the end of the buffer. */ | |
310 | ||
311 | INLINE int | |
312 | inc_bytepos (bytepos) | |
313 | int bytepos; | |
314 | { | |
ef316cf0 RS |
315 | if (NILP (current_buffer->enable_multibyte_characters)) |
316 | return bytepos + 1; | |
317 | ||
6a140a74 RS |
318 | INC_POS (bytepos); |
319 | return bytepos; | |
320 | } | |
321 | ||
322 | /* Return the bytepos one character before BYTEPOS. | |
323 | We assume that BYTEPOS is not at the start of the buffer. */ | |
324 | ||
325 | INLINE int | |
326 | dec_bytepos (bytepos) | |
327 | int bytepos; | |
328 | { | |
ef316cf0 RS |
329 | if (NILP (current_buffer->enable_multibyte_characters)) |
330 | return bytepos - 1; | |
331 | ||
6a140a74 RS |
332 | DEC_POS (bytepos); |
333 | return bytepos; | |
334 | } | |
195d1361 | 335 | \f |
7cc80f0a RS |
336 | /* Return a defun-start position before before POS and not too far before. |
337 | It should be the last one before POS, or nearly the last. | |
338 | ||
339 | When open_paren_in_column_0_is_defun_start is nonzero, | |
1fd1cc2f | 340 | only the beginning of the buffer is treated as a defun-start. |
7cc80f0a RS |
341 | |
342 | We record the information about where the scan started | |
343 | and what its result was, so that another call in the same area | |
344 | can return the same value very quickly. | |
195d1361 RS |
345 | |
346 | There is no promise at which position the global syntax data is | |
347 | valid on return from the subroutine, so the caller should explicitly | |
348 | update the global data. */ | |
37bef230 RS |
349 | |
350 | static int | |
6a140a74 RS |
351 | find_defun_start (pos, pos_byte) |
352 | int pos, pos_byte; | |
37bef230 | 353 | { |
6a140a74 | 354 | int opoint = PT, opoint_byte = PT_BYTE; |
37bef230 | 355 | |
1fd1cc2f RS |
356 | if (!open_paren_in_column_0_is_defun_start) |
357 | { | |
358 | find_start_value_byte = BEGV_BYTE; | |
359 | return BEGV; | |
360 | } | |
361 | ||
37bef230 RS |
362 | /* Use previous finding, if it's valid and applies to this inquiry. */ |
363 | if (current_buffer == find_start_buffer | |
364 | /* Reuse the defun-start even if POS is a little farther on. | |
365 | POS might be in the next defun, but that's ok. | |
366 | Our value may not be the best possible, but will still be usable. */ | |
367 | && pos <= find_start_pos + 1000 | |
368 | && pos >= find_start_value | |
369 | && BEGV == find_start_begv | |
370 | && MODIFF == find_start_modiff) | |
371 | return find_start_value; | |
372 | ||
373 | /* Back up to start of line. */ | |
6a140a74 | 374 | scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1); |
37bef230 | 375 | |
195d1361 RS |
376 | /* We optimize syntax-table lookup for rare updates. Thus we accept |
377 | only those `^\s(' which are good in global _and_ text-property | |
378 | syntax-tables. */ | |
379 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
380 | gl_state.use_global = 0; | |
1fd1cc2f | 381 | while (PT > BEGV) |
37bef230 | 382 | { |
1fd1cc2f RS |
383 | /* Open-paren at start of line means we may have found our |
384 | defun-start. */ | |
385 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) | |
195d1361 | 386 | { |
1fd1cc2f | 387 | SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */ |
4467eb94 | 388 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) |
1fd1cc2f RS |
389 | break; |
390 | /* Now fallback to the default value. */ | |
391 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
392 | gl_state.use_global = 0; | |
195d1361 | 393 | } |
1fd1cc2f RS |
394 | /* Move to beg of previous line. */ |
395 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1); | |
37bef230 RS |
396 | } |
397 | ||
398 | /* Record what we found, for the next try. */ | |
6a140a74 RS |
399 | find_start_value = PT; |
400 | find_start_value_byte = PT_BYTE; | |
37bef230 RS |
401 | find_start_buffer = current_buffer; |
402 | find_start_modiff = MODIFF; | |
403 | find_start_begv = BEGV; | |
404 | find_start_pos = pos; | |
405 | ||
6a140a74 RS |
406 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
407 | ||
37bef230 RS |
408 | return find_start_value; |
409 | } | |
410 | \f | |
f902a008 RS |
411 | /* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */ |
412 | ||
413 | static int | |
414 | prev_char_comend_first (pos, pos_byte) | |
415 | int pos, pos_byte; | |
416 | { | |
417 | int c, val; | |
418 | ||
419 | DEC_BOTH (pos, pos_byte); | |
420 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
421 | c = FETCH_CHAR (pos_byte); | |
422 | val = SYNTAX_COMEND_FIRST (c); | |
423 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
424 | return val; | |
425 | } | |
426 | ||
427 | /* Return the SYNTAX_COMSTART_FIRST of the character before POS, POS_BYTE. */ | |
428 | ||
3f679f55 SM |
429 | /* static int |
430 | * prev_char_comstart_first (pos, pos_byte) | |
431 | * int pos, pos_byte; | |
432 | * { | |
433 | * int c, val; | |
7d0393cf | 434 | * |
3f679f55 SM |
435 | * DEC_BOTH (pos, pos_byte); |
436 | * UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
437 | * c = FETCH_CHAR (pos_byte); | |
438 | * val = SYNTAX_COMSTART_FIRST (c); | |
439 | * UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
440 | * return val; | |
441 | * } */ | |
f902a008 | 442 | |
6a140a74 RS |
443 | /* Checks whether charpos FROM is at the end of a comment. |
444 | FROM_BYTE is the bytepos corresponding to FROM. | |
445 | Do not move back before STOP. | |
446 | ||
447 | Return a positive value if we find a comment ending at FROM/FROM_BYTE; | |
448 | return -1 otherwise. | |
449 | ||
450 | If successful, store the charpos of the comment's beginning | |
451 | into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR. | |
527a32d9 KH |
452 | |
453 | Global syntax data remains valid for backward search starting at | |
454 | the returned value (or at FROM, if the search was not successful). */ | |
195d1361 RS |
455 | |
456 | static int | |
95ff8dfc | 457 | back_comment (from, from_byte, stop, comnested, comstyle, charpos_ptr, bytepos_ptr) |
6a140a74 | 458 | int from, from_byte, stop; |
95ff8dfc | 459 | int comnested, comstyle; |
6a140a74 | 460 | int *charpos_ptr, *bytepos_ptr; |
195d1361 RS |
461 | { |
462 | /* Look back, counting the parity of string-quotes, | |
463 | and recording the comment-starters seen. | |
464 | When we reach a safe place, assume that's not in a string; | |
465 | then step the main scan to the earliest comment-starter seen | |
466 | an even number of string quotes away from the safe place. | |
467 | ||
468 | OFROM[I] is position of the earliest comment-starter seen | |
469 | which is I+2X quotes from the comment-end. | |
470 | PARITY is current parity of quotes from the comment end. */ | |
3ee5041c | 471 | int string_style = -1; /* Presumed outside of any string. */ |
195d1361 | 472 | int string_lossage = 0; |
f7c436c1 | 473 | /* Not a real lossage: indicates that we have passed a matching comment |
7d0393cf | 474 | starter plus a non-matching comment-ender, meaning that any matching |
f7c436c1 SM |
475 | comment-starter we might see later could be a false positive (hidden |
476 | inside another comment). | |
477 | Test case: { a (* b } c (* d *) */ | |
478 | int comment_lossage = 0; | |
195d1361 | 479 | int comment_end = from; |
6a140a74 | 480 | int comment_end_byte = from_byte; |
195d1361 | 481 | int comstart_pos = 0; |
6a140a74 | 482 | int comstart_byte; |
eb35b628 RS |
483 | /* Place where the containing defun starts, |
484 | or 0 if we didn't come across it yet. */ | |
485 | int defun_start = 0; | |
486 | int defun_start_byte = 0; | |
195d1361 | 487 | register enum syntaxcode code; |
95ff8dfc | 488 | int nesting = 1; /* current comment nesting */ |
ea315ed6 | 489 | int c; |
3f679f55 SM |
490 | int syntax = 0; |
491 | ||
492 | /* FIXME: A }} comment-ender style leads to incorrect behavior | |
493 | in the case of {{ c }}} because we ignore the last two chars which are | |
494 | assumed to be comment-enders although they aren't. */ | |
195d1361 RS |
495 | |
496 | /* At beginning of range to scan, we're outside of strings; | |
497 | that determines quote parity to the comment-end. */ | |
498 | while (from != stop) | |
499 | { | |
3f679f55 SM |
500 | int temp_byte, prev_syntax; |
501 | int com2start, com2end; | |
6a140a74 | 502 | |
195d1361 | 503 | /* Move back and examine a character. */ |
6a140a74 | 504 | DEC_BOTH (from, from_byte); |
195d1361 RS |
505 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
506 | ||
3f679f55 | 507 | prev_syntax = syntax; |
6a140a74 | 508 | c = FETCH_CHAR (from_byte); |
3f679f55 | 509 | syntax = SYNTAX_WITH_FLAGS (c); |
195d1361 RS |
510 | code = SYNTAX (c); |
511 | ||
3f679f55 SM |
512 | /* Check for 2-char comment markers. */ |
513 | com2start = (SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
514 | && SYNTAX_FLAGS_COMSTART_SECOND (prev_syntax) | |
515 | && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (prev_syntax) | |
516 | && (SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax) | |
517 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested); | |
518 | com2end = (SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
519 | && SYNTAX_FLAGS_COMEND_SECOND (prev_syntax)); | |
520 | ||
521 | /* Nasty cases with overlapping 2-char comment markers: | |
522 | - snmp-mode: -- c -- foo -- c -- | |
523 | --- c -- | |
524 | ------ c -- | |
525 | - c-mode: *||* | |
526 | |* *|* *| | |
527 | |*| |* |*| | |
528 | /// */ | |
529 | ||
530 | /* If a 2-char comment sequence partly overlaps with another, | |
531 | we don't try to be clever. */ | |
532 | if (from > stop && (com2end || com2start)) | |
195d1361 | 533 | { |
3f679f55 SM |
534 | int next = from, next_byte = from_byte, next_c, next_syntax; |
535 | DEC_BOTH (next, next_byte); | |
536 | UPDATE_SYNTAX_TABLE_BACKWARD (next); | |
537 | next_c = FETCH_CHAR (next_byte); | |
538 | next_syntax = SYNTAX_WITH_FLAGS (next_c); | |
539 | if (((com2start || comnested) | |
540 | && SYNTAX_FLAGS_COMEND_SECOND (syntax) | |
541 | && SYNTAX_FLAGS_COMEND_FIRST (next_syntax)) | |
542 | || ((com2end || comnested) | |
543 | && SYNTAX_FLAGS_COMSTART_SECOND (syntax) | |
544 | && comstyle == SYNTAX_FLAGS_COMMENT_STYLE (syntax) | |
545 | && SYNTAX_FLAGS_COMSTART_FIRST (next_syntax))) | |
546 | goto lossage; | |
547 | /* UPDATE_SYNTAX_TABLE_FORWARD (next + 1); */ | |
f902a008 | 548 | } |
3f679f55 SM |
549 | |
550 | if (com2start && comstart_pos == 0) | |
551 | /* We're looking at a comment starter. But it might be a comment | |
552 | ender as well (see snmp-mode). The first time we see one, we | |
553 | need to consider it as a comment starter, | |
554 | and the subsequent times as a comment ender. */ | |
555 | com2end = 0; | |
556 | ||
557 | /* Turn a 2-char comment sequences into the appropriate syntax. */ | |
558 | if (com2end) | |
559 | code = Sendcomment; | |
560 | else if (com2start) | |
561 | code = Scomment; | |
562 | /* Ignore comment starters of a different style. */ | |
563 | else if (code == Scomment | |
564 | && (comstyle != SYNTAX_FLAGS_COMMENT_STYLE (syntax) | |
565 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax) != comnested)) | |
1aa963c8 | 566 | continue; |
195d1361 | 567 | |
9828a477 KH |
568 | /* Ignore escaped characters, except comment-enders. */ |
569 | if (code != Sendcomment && char_quoted (from, from_byte)) | |
195d1361 RS |
570 | continue; |
571 | ||
3ee5041c | 572 | switch (code) |
195d1361 | 573 | { |
3ee5041c SM |
574 | case Sstring_fence: |
575 | case Scomment_fence: | |
576 | c = (code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE); | |
577 | case Sstring: | |
578 | /* Track parity of quotes. */ | |
579 | if (string_style == -1) | |
580 | /* Entering a string. */ | |
581 | string_style = c; | |
582 | else if (string_style == c) | |
583 | /* Leaving the string. */ | |
584 | string_style = -1; | |
585 | else | |
586 | /* If we have two kinds of string delimiters. | |
587 | There's no way to grok this scanning backwards. */ | |
195d1361 | 588 | string_lossage = 1; |
3ee5041c | 589 | break; |
7d0393cf | 590 | |
3ee5041c SM |
591 | case Scomment: |
592 | /* We've already checked that it is the relevant comstyle. */ | |
f7c436c1 | 593 | if (string_style != -1 || comment_lossage || string_lossage) |
3ee5041c SM |
594 | /* There are odd string quotes involved, so let's be careful. |
595 | Test case in Pascal: " { " a { " } */ | |
596 | goto lossage; | |
597 | ||
f7c436c1 SM |
598 | if (!comnested) |
599 | { | |
600 | /* Record best comment-starter so far. */ | |
601 | comstart_pos = from; | |
602 | comstart_byte = from_byte; | |
603 | } | |
604 | else if (--nesting <= 0) | |
95ff8dfc RS |
605 | /* nested comments have to be balanced, so we don't need to |
606 | keep looking for earlier ones. We use here the same (slightly | |
607 | incorrect) reasoning as below: since it is followed by uniform | |
608 | paired string quotes, this comment-start has to be outside of | |
609 | strings, else the comment-end itself would be inside a string. */ | |
610 | goto done; | |
3ee5041c SM |
611 | break; |
612 | ||
02010917 | 613 | case Sendcomment: |
3f679f55 | 614 | if (SYNTAX_FLAGS_COMMENT_STYLE (syntax) == comstyle |
d070eb22 | 615 | && ((com2end && SYNTAX_FLAGS_COMMENT_NESTED (prev_syntax)) |
3f679f55 | 616 | || SYNTAX_FLAGS_COMMENT_NESTED (syntax)) == comnested) |
02010917 SM |
617 | /* This is the same style of comment ender as ours. */ |
618 | { | |
619 | if (comnested) | |
620 | nesting++; | |
621 | else | |
622 | /* Anything before that can't count because it would match | |
623 | this comment-ender rather than ours. */ | |
624 | from = stop; /* Break out of the loop. */ | |
625 | } | |
f7c436c1 SM |
626 | else if (comstart_pos != 0 || c != '\n') |
627 | /* We're mixing comment styles here, so we'd better be careful. | |
628 | The (comstart_pos != 0 || c != '\n') check is not quite correct | |
629 | (we should just always set comment_lossage), but removing it | |
630 | would imply that any multiline comment in C would go through | |
631 | lossage, which seems overkill. | |
632 | The failure should only happen in the rare cases such as | |
633 | { (* } *) */ | |
634 | comment_lossage = 1; | |
02010917 | 635 | break; |
195d1361 | 636 | |
02010917 SM |
637 | case Sopen: |
638 | /* Assume a defun-start point is outside of strings. */ | |
639 | if (open_paren_in_column_0_is_defun_start | |
640 | && (from == stop | |
641 | || (temp_byte = dec_bytepos (from_byte), | |
642 | FETCH_CHAR (temp_byte) == '\n'))) | |
643 | { | |
644 | defun_start = from; | |
645 | defun_start_byte = from_byte; | |
646 | from = stop; /* Break out of the loop. */ | |
647 | } | |
eb35b628 | 648 | break; |
02010917 SM |
649 | |
650 | default: | |
f7c436c1 | 651 | break; |
eb35b628 | 652 | } |
195d1361 RS |
653 | } |
654 | ||
655 | if (comstart_pos == 0) | |
656 | { | |
657 | from = comment_end; | |
6a140a74 | 658 | from_byte = comment_end_byte; |
195d1361 RS |
659 | UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1); |
660 | } | |
f7c436c1 SM |
661 | /* If comstart_pos is set and we get here (ie. didn't jump to `lossage' |
662 | or `done'), then we've found the beginning of the non-nested comment. */ | |
663 | else if (1) /* !comnested */ | |
195d1361 RS |
664 | { |
665 | from = comstart_pos; | |
6a140a74 | 666 | from_byte = comstart_byte; |
195d1361 RS |
667 | /* Globals are correct now. */ |
668 | } | |
669 | else | |
670 | { | |
3ee5041c SM |
671 | struct lisp_parse_state state; |
672 | lossage: | |
195d1361 RS |
673 | /* We had two kinds of string delimiters mixed up |
674 | together. Decode this going forwards. | |
02010917 | 675 | Scan fwd from a known safe place (beginning-of-defun) |
195d1361 RS |
676 | to the one in question; this records where we |
677 | last passed a comment starter. */ | |
eb35b628 RS |
678 | /* If we did not already find the defun start, find it now. */ |
679 | if (defun_start == 0) | |
680 | { | |
681 | defun_start = find_defun_start (comment_end, comment_end_byte); | |
682 | defun_start_byte = find_start_value_byte; | |
683 | } | |
02010917 | 684 | do |
195d1361 | 685 | { |
02010917 SM |
686 | scan_sexps_forward (&state, |
687 | defun_start, defun_start_byte, | |
688 | comment_end, -10000, 0, Qnil, 0); | |
689 | defun_start = comment_end; | |
690 | if (state.incomment == (comnested ? 1 : -1) | |
691 | && state.comstyle == comstyle) | |
692 | from = state.comstr_start; | |
693 | else | |
694 | { | |
695 | from = comment_end; | |
696 | if (state.incomment) | |
697 | /* If comment_end is inside some other comment, maybe ours | |
698 | is nested, so we need to try again from within the | |
699 | surrounding comment. Example: { a (* " *) */ | |
700 | { | |
701 | /* FIXME: We should advance by one or two chars. */ | |
702 | defun_start = state.comstr_start + 2; | |
703 | defun_start_byte = CHAR_TO_BYTE (defun_start); | |
704 | } | |
705 | } | |
706 | } while (defun_start < comment_end); | |
707 | ||
6a140a74 | 708 | from_byte = CHAR_TO_BYTE (from); |
195d1361 RS |
709 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
710 | } | |
7d0393cf | 711 | |
95ff8dfc | 712 | done: |
6a140a74 RS |
713 | *charpos_ptr = from; |
714 | *bytepos_ptr = from_byte; | |
715 | ||
1aa963c8 | 716 | return (from == comment_end) ? -1 : from; |
195d1361 RS |
717 | } |
718 | \f | |
8489eb67 | 719 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
fdb82f93 PJ |
720 | doc: /* Return t if OBJECT is a syntax table. |
721 | Currently, any char-table counts as a syntax table. */) | |
722 | (object) | |
2203e1e8 | 723 | Lisp_Object object; |
8489eb67 | 724 | { |
2203e1e8 | 725 | if (CHAR_TABLE_P (object) |
e704cb4b | 726 | && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table)) |
8489eb67 RS |
727 | return Qt; |
728 | return Qnil; | |
729 | } | |
730 | ||
8ea151b2 | 731 | static void |
8489eb67 RS |
732 | check_syntax_table (obj) |
733 | Lisp_Object obj; | |
734 | { | |
d1be9f0f | 735 | if (!(CHAR_TABLE_P (obj) |
e704cb4b | 736 | && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table))) |
d1be9f0f | 737 | wrong_type_argument (Qsyntax_table_p, obj); |
7d0393cf | 738 | } |
8489eb67 | 739 | |
8489eb67 | 740 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, |
fdb82f93 PJ |
741 | doc: /* Return the current syntax table. |
742 | This is the one specified by the current buffer. */) | |
743 | () | |
8489eb67 RS |
744 | { |
745 | return current_buffer->syntax_table; | |
746 | } | |
747 | ||
748 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
749 | Sstandard_syntax_table, 0, 0, 0, | |
fdb82f93 PJ |
750 | doc: /* Return the standard syntax table. |
751 | This is the one used for new buffers. */) | |
752 | () | |
8489eb67 RS |
753 | { |
754 | return Vstandard_syntax_table; | |
755 | } | |
756 | ||
757 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
fdb82f93 PJ |
758 | doc: /* Construct a new syntax table and return it. |
759 | It is a copy of the TABLE, which defaults to the standard syntax table. */) | |
760 | (table) | |
8489eb67 RS |
761 | Lisp_Object table; |
762 | { | |
8ea151b2 RS |
763 | Lisp_Object copy; |
764 | ||
265a9e55 | 765 | if (!NILP (table)) |
8ea151b2 RS |
766 | check_syntax_table (table); |
767 | else | |
768 | table = Vstandard_syntax_table; | |
769 | ||
770 | copy = Fcopy_sequence (table); | |
0f867324 RS |
771 | |
772 | /* Only the standard syntax table should have a default element. | |
773 | Other syntax tables should inherit from parents instead. */ | |
774 | XCHAR_TABLE (copy)->defalt = Qnil; | |
775 | ||
776 | /* Copied syntax tables should all have parents. | |
777 | If we copied one with no parent, such as the standard syntax table, | |
778 | use the standard syntax table as the copy's parent. */ | |
779 | if (NILP (XCHAR_TABLE (copy)->parent)) | |
780 | Fset_char_table_parent (copy, Vstandard_syntax_table); | |
8ea151b2 | 781 | return copy; |
8489eb67 RS |
782 | } |
783 | ||
784 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
fdb82f93 PJ |
785 | doc: /* Select a new syntax table for the current buffer. |
786 | One argument, a syntax table. */) | |
787 | (table) | |
8489eb67 RS |
788 | Lisp_Object table; |
789 | { | |
4e4dfa78 | 790 | int idx; |
8ea151b2 | 791 | check_syntax_table (table); |
8489eb67 RS |
792 | current_buffer->syntax_table = table; |
793 | /* Indicate that this buffer now has a specified syntax table. */ | |
f6cd0527 GM |
794 | idx = PER_BUFFER_VAR_IDX (syntax_table); |
795 | SET_PER_BUFFER_VALUE_P (current_buffer, idx, 1); | |
8489eb67 RS |
796 | return table; |
797 | } | |
798 | \f | |
799 | /* Convert a letter which signifies a syntax code | |
800 | into the code it signifies. | |
195d1361 | 801 | This is used by modify-syntax-entry, and other things. */ |
8489eb67 RS |
802 | |
803 | unsigned char syntax_spec_code[0400] = | |
804 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
805 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
806 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
807 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
195d1361 | 808 | (char) Swhitespace, (char) Scomment_fence, (char) Sstring, 0377, |
8489eb67 RS |
809 | (char) Smath, 0377, 0377, (char) Squote, |
810 | (char) Sopen, (char) Sclose, 0377, 0377, | |
811 | 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
812 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
813 | 0377, 0377, 0377, 0377, | |
814 | (char) Scomment, 0377, (char) Sendcomment, 0377, | |
6cb71bf6 | 815 | (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ |
8489eb67 RS |
816 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
817 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
818 | 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
819 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
820 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
821 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
195d1361 | 822 | 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
8489eb67 RS |
823 | }; |
824 | ||
195d1361 | 825 | /* Indexed by syntax code, give the letter that describes it. */ |
8489eb67 | 826 | |
195d1361 | 827 | char syntax_code_spec[16] = |
8489eb67 | 828 | { |
195d1361 RS |
829 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@', |
830 | '!', '|' | |
8489eb67 | 831 | }; |
93da5fff KH |
832 | |
833 | /* Indexed by syntax code, give the object (cons of syntax code and | |
834 | nil) to be stored in syntax table. Since these objects can be | |
835 | shared among syntax tables, we generate them in advance. By | |
836 | sharing objects, the function `describe-syntax' can give a more | |
837 | compact listing. */ | |
838 | static Lisp_Object Vsyntax_code_object; | |
839 | ||
8489eb67 | 840 | \f |
8ea151b2 RS |
841 | /* Look up the value for CHARACTER in syntax table TABLE's parent |
842 | and its parents. SYNTAX_ENTRY calls this, when TABLE itself has nil | |
843 | for CHARACTER. It's actually used only when not compiled with GCC. */ | |
844 | ||
845 | Lisp_Object | |
846 | syntax_parent_lookup (table, character) | |
847 | Lisp_Object table; | |
848 | int character; | |
849 | { | |
850 | Lisp_Object value; | |
851 | ||
852 | while (1) | |
853 | { | |
854 | table = XCHAR_TABLE (table)->parent; | |
855 | if (NILP (table)) | |
856 | return Qnil; | |
857 | ||
858 | value = XCHAR_TABLE (table)->contents[character]; | |
859 | if (!NILP (value)) | |
860 | return value; | |
861 | } | |
862 | } | |
863 | ||
8489eb67 | 864 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, |
fdb82f93 PJ |
865 | doc: /* Return the syntax code of CHARACTER, described by a character. |
866 | For example, if CHARACTER is a word constituent, | |
867 | the character `w' is returned. | |
868 | The characters that correspond to various syntax codes | |
869 | are listed in the documentation of `modify-syntax-entry'. */) | |
870 | (character) | |
2203e1e8 | 871 | Lisp_Object character; |
8489eb67 | 872 | { |
8ea151b2 | 873 | int char_int; |
195d1361 RS |
874 | gl_state.current_syntax_table = current_buffer->syntax_table; |
875 | ||
876 | gl_state.use_global = 0; | |
b7826503 | 877 | CHECK_NUMBER (character); |
2203e1e8 | 878 | char_int = XINT (character); |
8ea151b2 | 879 | return make_number (syntax_code_spec[(int) SYNTAX (char_int)]); |
beefa22e RS |
880 | } |
881 | ||
882 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
fdb82f93 PJ |
883 | doc: /* Return the matching parenthesis of CHARACTER, or nil if none. */) |
884 | (character) | |
2203e1e8 | 885 | Lisp_Object character; |
beefa22e | 886 | { |
8ea151b2 | 887 | int char_int, code; |
195d1361 RS |
888 | gl_state.current_syntax_table = current_buffer->syntax_table; |
889 | gl_state.use_global = 0; | |
b7826503 | 890 | CHECK_NUMBER (character); |
2203e1e8 | 891 | char_int = XINT (character); |
8ea151b2 | 892 | code = SYNTAX (char_int); |
a8bd7cd8 | 893 | if (code == Sopen || code == Sclose) |
2e34157c | 894 | return SYNTAX_MATCH (char_int); |
beefa22e | 895 | return Qnil; |
8489eb67 RS |
896 | } |
897 | ||
c65adb44 | 898 | DEFUN ("string-to-syntax", Fstring_to_syntax, Sstring_to_syntax, 1, 1, 0, |
fdb82f93 PJ |
899 | doc: /* Convert a syntax specification STRING into syntax cell form. |
900 | STRING should be a string as it is allowed as argument of | |
901 | `modify-syntax-entry'. Value is the equivalent cons cell | |
902 | (CODE . MATCHING-CHAR) that can be used as value of a `syntax-table' | |
903 | text property. */) | |
904 | (string) | |
c65adb44 | 905 | Lisp_Object string; |
8489eb67 | 906 | { |
2e567bd3 | 907 | register const unsigned char *p; |
8489eb67 | 908 | register enum syntaxcode code; |
247e20a8 | 909 | int val; |
8ea151b2 | 910 | Lisp_Object match; |
8489eb67 | 911 | |
b7826503 | 912 | CHECK_STRING (string); |
8489eb67 | 913 | |
d5db4077 | 914 | p = SDATA (string); |
8489eb67 RS |
915 | code = (enum syntaxcode) syntax_spec_code[*p++]; |
916 | if (((int) code & 0377) == 0377) | |
2e34157c | 917 | error ("invalid syntax description letter: %c", p[-1]); |
8489eb67 | 918 | |
8ea151b2 | 919 | if (code == Sinherit) |
c65adb44 | 920 | return Qnil; |
8ea151b2 RS |
921 | |
922 | if (*p) | |
d1be9f0f | 923 | { |
93da5fff | 924 | int len; |
7c19e8e1 | 925 | int character = (STRING_CHAR_AND_LENGTH |
d5db4077 | 926 | (p, SBYTES (string) - 1, len)); |
93da5fff | 927 | XSETINT (match, character); |
d1be9f0f RS |
928 | if (XFASTINT (match) == ' ') |
929 | match = Qnil; | |
93da5fff | 930 | p += len; |
d1be9f0f RS |
931 | } |
932 | else | |
8ea151b2 | 933 | match = Qnil; |
8489eb67 | 934 | |
8ea151b2 | 935 | val = (int) code; |
8489eb67 RS |
936 | while (*p) |
937 | switch (*p++) | |
938 | { | |
939 | case '1': | |
247e20a8 | 940 | val |= 1 << 16; |
8489eb67 RS |
941 | break; |
942 | ||
943 | case '2': | |
247e20a8 | 944 | val |= 1 << 17; |
8489eb67 RS |
945 | break; |
946 | ||
947 | case '3': | |
247e20a8 | 948 | val |= 1 << 18; |
8489eb67 RS |
949 | break; |
950 | ||
951 | case '4': | |
247e20a8 | 952 | val |= 1 << 19; |
8489eb67 RS |
953 | break; |
954 | ||
955 | case 'p': | |
247e20a8 | 956 | val |= 1 << 20; |
8489eb67 | 957 | break; |
e5d4f4dc RS |
958 | |
959 | case 'b': | |
247e20a8 | 960 | val |= 1 << 21; |
e5d4f4dc | 961 | break; |
95ff8dfc RS |
962 | |
963 | case 'n': | |
964 | val |= 1 << 22; | |
965 | break; | |
8489eb67 | 966 | } |
7d0393cf | 967 | |
93da5fff | 968 | if (val < XVECTOR (Vsyntax_code_object)->size && NILP (match)) |
c65adb44 | 969 | return XVECTOR (Vsyntax_code_object)->contents[val]; |
93da5fff KH |
970 | else |
971 | /* Since we can't use a shared object, let's make a new one. */ | |
c65adb44 SM |
972 | return Fcons (make_number (val), match); |
973 | } | |
974 | ||
fdb82f93 | 975 | /* I really don't know why this is interactive |
2c9e1900 | 976 | help-form should at least be made useful whilst reading the second arg. */ |
7d0393cf | 977 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, |
c65adb44 | 978 | "cSet syntax for character: \nsSet syntax for %s to: ", |
a50a10a0 | 979 | doc: /* Set syntax for character CHAR according to string NEWENTRY. |
fdb82f93 PJ |
980 | The syntax is changed only for table SYNTAX_TABLE, which defaults to |
981 | the current buffer's syntax table. | |
982 | The first character of NEWENTRY should be one of the following: | |
983 | Space or - whitespace syntax. w word constituent. | |
984 | _ symbol constituent. . punctuation. | |
985 | ( open-parenthesis. ) close-parenthesis. | |
986 | " string quote. \\ escape. | |
987 | $ paired delimiter. ' expression quote or prefix operator. | |
988 | < comment starter. > comment ender. | |
989 | / character-quote. @ inherit from `standard-syntax-table'. | |
990 | | generic string fence. ! generic comment fence. | |
991 | ||
992 | Only single-character comment start and end sequences are represented thus. | |
993 | Two-character sequences are represented as described below. | |
994 | The second character of NEWENTRY is the matching parenthesis, | |
995 | used only if the first character is `(' or `)'. | |
996 | Any additional characters are flags. | |
997 | Defined flags are the characters 1, 2, 3, 4, b, p, and n. | |
a50a10a0 PJ |
998 | 1 means CHAR is the start of a two-char comment start sequence. |
999 | 2 means CHAR is the second character of such a sequence. | |
1000 | 3 means CHAR is the start of a two-char comment end sequence. | |
1001 | 4 means CHAR is the second character of such a sequence. | |
fdb82f93 PJ |
1002 | |
1003 | There can be up to two orthogonal comment sequences. This is to support | |
1004 | language modes such as C++. By default, all comment sequences are of style | |
1005 | a, but you can set the comment sequence style to b (on the second character | |
1006 | of a comment-start, or the first character of a comment-end sequence) using | |
1007 | this flag: | |
a50a10a0 PJ |
1008 | b means CHAR is part of comment sequence b. |
1009 | n means CHAR is part of a nestable comment sequence. | |
fdb82f93 | 1010 | |
a50a10a0 | 1011 | p means CHAR is a prefix character for `backward-prefix-chars'; |
fdb82f93 | 1012 | such characters are treated as whitespace when they occur |
a50a10a0 PJ |
1013 | between expressions. |
1014 | usage: (modify-syntax-entry CHAR NEWENTRY &optional SYNTAX-TABLE) */) | |
fdb82f93 | 1015 | (c, newentry, syntax_table) |
c65adb44 SM |
1016 | Lisp_Object c, newentry, syntax_table; |
1017 | { | |
b7826503 | 1018 | CHECK_NUMBER (c); |
c65adb44 SM |
1019 | |
1020 | if (NILP (syntax_table)) | |
1021 | syntax_table = current_buffer->syntax_table; | |
1022 | else | |
1023 | check_syntax_table (syntax_table); | |
8489eb67 | 1024 | |
c65adb44 | 1025 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), Fstring_to_syntax (newentry)); |
8489eb67 RS |
1026 | return Qnil; |
1027 | } | |
1028 | \f | |
1029 | /* Dump syntax table to buffer in human-readable format */ | |
1030 | ||
62abe9cb SM |
1031 | DEFUN ("internal-describe-syntax-value", Finternal_describe_syntax_value, |
1032 | Sinternal_describe_syntax_value, 1, 1, 0, | |
1033 | doc: /* Insert a description of the internal syntax description SYNTAX at point. */) | |
1034 | (syntax) | |
1035 | Lisp_Object syntax; | |
8489eb67 RS |
1036 | { |
1037 | register enum syntaxcode code; | |
e6365855 | 1038 | char desc, start1, start2, end1, end2, prefix, comstyle, comnested; |
8489eb67 | 1039 | char str[2]; |
62abe9cb | 1040 | Lisp_Object first, match_lisp, value = syntax; |
8489eb67 | 1041 | |
8ea151b2 RS |
1042 | if (NILP (value)) |
1043 | { | |
62abe9cb SM |
1044 | insert_string ("default"); |
1045 | return syntax; | |
8ea151b2 RS |
1046 | } |
1047 | ||
908b7fea KH |
1048 | if (CHAR_TABLE_P (value)) |
1049 | { | |
62abe9cb SM |
1050 | insert_string ("deeper char-table ..."); |
1051 | return syntax; | |
908b7fea KH |
1052 | } |
1053 | ||
8ea151b2 RS |
1054 | if (!CONSP (value)) |
1055 | { | |
62abe9cb SM |
1056 | insert_string ("invalid"); |
1057 | return syntax; | |
8ea151b2 RS |
1058 | } |
1059 | ||
c1d497be KR |
1060 | first = XCAR (value); |
1061 | match_lisp = XCDR (value); | |
8ea151b2 RS |
1062 | |
1063 | if (!INTEGERP (first) || !(NILP (match_lisp) || INTEGERP (match_lisp))) | |
8489eb67 | 1064 | { |
62abe9cb SM |
1065 | insert_string ("invalid"); |
1066 | return syntax; | |
8489eb67 RS |
1067 | } |
1068 | ||
e704cb4b | 1069 | code = (enum syntaxcode) (XINT (first) & 0377); |
8ea151b2 RS |
1070 | start1 = (XINT (first) >> 16) & 1; |
1071 | start2 = (XINT (first) >> 17) & 1; | |
1072 | end1 = (XINT (first) >> 18) & 1; | |
1073 | end2 = (XINT (first) >> 19) & 1; | |
1074 | prefix = (XINT (first) >> 20) & 1; | |
1075 | comstyle = (XINT (first) >> 21) & 1; | |
e6365855 | 1076 | comnested = (XINT (first) >> 22) & 1; |
8489eb67 RS |
1077 | |
1078 | if ((int) code < 0 || (int) code >= (int) Smax) | |
1079 | { | |
1080 | insert_string ("invalid"); | |
62abe9cb | 1081 | return syntax; |
8489eb67 RS |
1082 | } |
1083 | desc = syntax_code_spec[(int) code]; | |
1084 | ||
1085 | str[0] = desc, str[1] = 0; | |
1086 | insert (str, 1); | |
1087 | ||
93da5fff KH |
1088 | if (NILP (match_lisp)) |
1089 | insert (" ", 1); | |
1090 | else | |
1091 | insert_char (XINT (match_lisp)); | |
8489eb67 | 1092 | |
8489eb67 RS |
1093 | if (start1) |
1094 | insert ("1", 1); | |
1095 | if (start2) | |
1096 | insert ("2", 1); | |
1097 | ||
1098 | if (end1) | |
1099 | insert ("3", 1); | |
1100 | if (end2) | |
1101 | insert ("4", 1); | |
1102 | ||
1103 | if (prefix) | |
1104 | insert ("p", 1); | |
e5d4f4dc RS |
1105 | if (comstyle) |
1106 | insert ("b", 1); | |
e6365855 SM |
1107 | if (comnested) |
1108 | insert ("n", 1); | |
8489eb67 RS |
1109 | |
1110 | insert_string ("\twhich means: "); | |
1111 | ||
0220c518 | 1112 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
1113 | { |
1114 | case Swhitespace: | |
1115 | insert_string ("whitespace"); break; | |
1116 | case Spunct: | |
1117 | insert_string ("punctuation"); break; | |
1118 | case Sword: | |
1119 | insert_string ("word"); break; | |
1120 | case Ssymbol: | |
1121 | insert_string ("symbol"); break; | |
1122 | case Sopen: | |
1123 | insert_string ("open"); break; | |
1124 | case Sclose: | |
1125 | insert_string ("close"); break; | |
1126 | case Squote: | |
d671382e | 1127 | insert_string ("prefix"); break; |
8489eb67 RS |
1128 | case Sstring: |
1129 | insert_string ("string"); break; | |
1130 | case Smath: | |
1131 | insert_string ("math"); break; | |
1132 | case Sescape: | |
1133 | insert_string ("escape"); break; | |
1134 | case Scharquote: | |
1135 | insert_string ("charquote"); break; | |
1136 | case Scomment: | |
1137 | insert_string ("comment"); break; | |
1138 | case Sendcomment: | |
1139 | insert_string ("endcomment"); break; | |
d671382e SM |
1140 | case Sinherit: |
1141 | insert_string ("inherit"); break; | |
1142 | case Scomment_fence: | |
1143 | insert_string ("comment fence"); break; | |
1144 | case Sstring_fence: | |
1145 | insert_string ("string fence"); break; | |
8489eb67 RS |
1146 | default: |
1147 | insert_string ("invalid"); | |
62abe9cb | 1148 | return syntax; |
8489eb67 RS |
1149 | } |
1150 | ||
8ea151b2 | 1151 | if (!NILP (match_lisp)) |
8489eb67 RS |
1152 | { |
1153 | insert_string (", matches "); | |
8ea151b2 | 1154 | insert_char (XINT (match_lisp)); |
8489eb67 RS |
1155 | } |
1156 | ||
1157 | if (start1) | |
1158 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
1159 | if (start2) | |
1160 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
1161 | ||
1162 | if (end1) | |
1163 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
1164 | if (end2) | |
1165 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
1166 | if (comstyle) |
1167 | insert_string (" (comment style b)"); | |
e6365855 SM |
1168 | if (comnested) |
1169 | insert_string (" (nestable)"); | |
e5d4f4dc | 1170 | |
8489eb67 RS |
1171 | if (prefix) |
1172 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
1173 | ||
62abe9cb SM |
1174 | return syntax; |
1175 | } | |
8489eb67 | 1176 | \f |
195d1361 RS |
1177 | int parse_sexp_ignore_comments; |
1178 | ||
8489eb67 RS |
1179 | /* Return the position across COUNT words from FROM. |
1180 | If that many words cannot be found before the end of the buffer, return 0. | |
1181 | COUNT negative means scan backward and stop at word beginning. */ | |
1182 | ||
dfcf069d | 1183 | int |
8489eb67 RS |
1184 | scan_words (from, count) |
1185 | register int from, count; | |
1186 | { | |
1187 | register int beg = BEGV; | |
1188 | register int end = ZV; | |
6a140a74 | 1189 | register int from_byte = CHAR_TO_BYTE (from); |
93da5fff KH |
1190 | register enum syntaxcode code; |
1191 | int ch0, ch1; | |
8489eb67 RS |
1192 | |
1193 | immediate_quit = 1; | |
1194 | QUIT; | |
1195 | ||
195d1361 RS |
1196 | SETUP_SYNTAX_TABLE (from, count); |
1197 | ||
8489eb67 RS |
1198 | while (count > 0) |
1199 | { | |
1200 | while (1) | |
1201 | { | |
1202 | if (from == end) | |
1203 | { | |
1204 | immediate_quit = 0; | |
1205 | return 0; | |
1206 | } | |
195d1361 | 1207 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1208 | ch0 = FETCH_CHAR (from_byte); |
93da5fff | 1209 | code = SYNTAX (ch0); |
6a140a74 | 1210 | INC_BOTH (from, from_byte); |
8489eb67 RS |
1211 | if (words_include_escapes |
1212 | && (code == Sescape || code == Scharquote)) | |
1213 | break; | |
1214 | if (code == Sword) | |
1215 | break; | |
8489eb67 | 1216 | } |
93da5fff KH |
1217 | /* Now CH0 is a character which begins a word and FROM is the |
1218 | position of the next character. */ | |
8489eb67 RS |
1219 | while (1) |
1220 | { | |
1221 | if (from == end) break; | |
195d1361 | 1222 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1223 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1224 | code = SYNTAX (ch1); |
8489eb67 RS |
1225 | if (!(words_include_escapes |
1226 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1227 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1228 | break; |
6a140a74 | 1229 | INC_BOTH (from, from_byte); |
93da5fff | 1230 | ch0 = ch1; |
8489eb67 RS |
1231 | } |
1232 | count--; | |
1233 | } | |
1234 | while (count < 0) | |
1235 | { | |
1236 | while (1) | |
1237 | { | |
1238 | if (from == beg) | |
1239 | { | |
1240 | immediate_quit = 0; | |
1241 | return 0; | |
1242 | } | |
6a140a74 | 1243 | DEC_BOTH (from, from_byte); |
195d1361 | 1244 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1245 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1246 | code = SYNTAX (ch1); |
8489eb67 RS |
1247 | if (words_include_escapes |
1248 | && (code == Sescape || code == Scharquote)) | |
1249 | break; | |
1250 | if (code == Sword) | |
1251 | break; | |
8489eb67 | 1252 | } |
93da5fff KH |
1253 | /* Now CH1 is a character which ends a word and FROM is the |
1254 | position of it. */ | |
8489eb67 RS |
1255 | while (1) |
1256 | { | |
6a140a74 RS |
1257 | int temp_byte; |
1258 | ||
1259 | if (from == beg) | |
1260 | break; | |
1261 | temp_byte = dec_bytepos (from_byte); | |
195d1361 | 1262 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1263 | ch0 = FETCH_CHAR (temp_byte); |
93da5fff | 1264 | code = SYNTAX (ch0); |
8489eb67 RS |
1265 | if (!(words_include_escapes |
1266 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1267 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1268 | break; |
6a140a74 | 1269 | DEC_BOTH (from, from_byte); |
93da5fff | 1270 | ch1 = ch0; |
8489eb67 RS |
1271 | } |
1272 | count++; | |
1273 | } | |
1274 | ||
1275 | immediate_quit = 0; | |
1276 | ||
1277 | return from; | |
1278 | } | |
1279 | ||
463f5630 | 1280 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", |
fdb82f93 PJ |
1281 | doc: /* Move point forward ARG words (backward if ARG is negative). |
1282 | Normally returns t. | |
1283 | If an edge of the buffer or a field boundary is reached, point is left there | |
1284 | and the function returns nil. Field boundaries are not noticed if | |
1285 | `inhibit-field-text-motion' is non-nil. */) | |
463f5630 KH |
1286 | (count) |
1287 | Lisp_Object count; | |
8489eb67 | 1288 | { |
2c6ea900 | 1289 | int orig_val, val; |
463f5630 | 1290 | CHECK_NUMBER (count); |
8489eb67 | 1291 | |
463f5630 | 1292 | val = orig_val = scan_words (PT, XINT (count)); |
2c6ea900 | 1293 | if (! orig_val) |
463f5630 | 1294 | val = XINT (count) > 0 ? ZV : BEGV; |
5878ee6f | 1295 | |
b8855607 | 1296 | /* Avoid jumping out of an input field. */ |
64aa4eb1 | 1297 | val = XFASTINT (Fconstrain_to_field (make_number (val), make_number (PT), |
070fe99c | 1298 | Qt, Qnil, Qnil)); |
7d0393cf | 1299 | |
8489eb67 | 1300 | SET_PT (val); |
e6d8341f | 1301 | return val == orig_val ? Qt : Qnil; |
8489eb67 RS |
1302 | } |
1303 | \f | |
195d1361 RS |
1304 | Lisp_Object skip_chars (); |
1305 | ||
1306 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, | |
fdb82f93 PJ |
1307 | doc: /* Move point forward, stopping before a char not in STRING, or at pos LIM. |
1308 | STRING is like the inside of a `[...]' in a regular expression | |
1309 | except that `]' is never special and `\\' quotes `^', `-' or `\\' | |
1310 | (but not as the end of a range; quoting is never needed there). | |
1311 | Thus, with arg "a-zA-Z", this skips letters stopping before first nonletter. | |
1312 | With arg "^a-zA-Z", skips nonletters stopping before first letter. | |
b222e415 DL |
1313 | Returns the distance traveled, either zero or positive. |
1314 | Note that char classes, e.g. `[:alpha:]', are not currently supported; | |
1315 | they will be treated as literals. */) | |
fdb82f93 | 1316 | (string, lim) |
195d1361 RS |
1317 | Lisp_Object string, lim; |
1318 | { | |
1319 | return skip_chars (1, 0, string, lim); | |
1320 | } | |
1321 | ||
1322 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, | |
fdb82f93 PJ |
1323 | doc: /* Move point backward, stopping after a char not in STRING, or at pos LIM. |
1324 | See `skip-chars-forward' for details. | |
1325 | Returns the distance traveled, either zero or negative. */) | |
1326 | (string, lim) | |
195d1361 RS |
1327 | Lisp_Object string, lim; |
1328 | { | |
1329 | return skip_chars (0, 0, string, lim); | |
1330 | } | |
1331 | ||
1332 | DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0, | |
fdb82f93 PJ |
1333 | doc: /* Move point forward across chars in specified syntax classes. |
1334 | SYNTAX is a string of syntax code characters. | |
1335 | Stop before a char whose syntax is not in SYNTAX, or at position LIM. | |
1336 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1337 | This function returns the distance traveled, either zero or positive. */) | |
1338 | (syntax, lim) | |
195d1361 RS |
1339 | Lisp_Object syntax, lim; |
1340 | { | |
1341 | return skip_chars (1, 1, syntax, lim); | |
1342 | } | |
1343 | ||
1344 | DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0, | |
fdb82f93 PJ |
1345 | doc: /* Move point backward across chars in specified syntax classes. |
1346 | SYNTAX is a string of syntax code characters. | |
1347 | Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM. | |
1348 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX. | |
1349 | This function returns the distance traveled, either zero or negative. */) | |
1350 | (syntax, lim) | |
195d1361 RS |
1351 | Lisp_Object syntax, lim; |
1352 | { | |
1353 | return skip_chars (0, 1, syntax, lim); | |
1354 | } | |
1355 | ||
6a140a74 | 1356 | static Lisp_Object |
195d1361 RS |
1357 | skip_chars (forwardp, syntaxp, string, lim) |
1358 | int forwardp, syntaxp; | |
1359 | Lisp_Object string, lim; | |
1360 | { | |
195d1361 RS |
1361 | register unsigned int c; |
1362 | unsigned char fastmap[0400]; | |
7e68b0ea | 1363 | /* If SYNTAXP is 0, STRING may contain multi-byte form of characters |
9690d026 KH |
1364 | of which codes don't fit in FASTMAP. In that case, set the |
1365 | ranges of characters in CHAR_RANGES. */ | |
5df4982e | 1366 | int *char_ranges; |
7e68b0ea | 1367 | int n_char_ranges = 0; |
195d1361 | 1368 | int negate = 0; |
4101e6fe | 1369 | register int i, i_byte; |
7e68b0ea | 1370 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
1674d9a2 RS |
1371 | int string_multibyte; |
1372 | int size_byte; | |
2e567bd3 | 1373 | const unsigned char *str; |
82d497fc | 1374 | int len; |
195d1361 | 1375 | |
b7826503 | 1376 | CHECK_STRING (string); |
d5db4077 | 1377 | char_ranges = (int *) alloca (SCHARS (string) * (sizeof (int)) * 2); |
1674d9a2 | 1378 | string_multibyte = STRING_MULTIBYTE (string); |
d5db4077 KR |
1379 | str = SDATA (string); |
1380 | size_byte = SBYTES (string); | |
195d1361 | 1381 | |
82d497fc KH |
1382 | /* Adjust the multibyteness of the string to that of the buffer. */ |
1383 | if (multibyte != string_multibyte) | |
1384 | { | |
1385 | int nbytes; | |
1386 | ||
1387 | if (multibyte) | |
d5db4077 KR |
1388 | nbytes = count_size_as_multibyte (SDATA (string), |
1389 | SCHARS (string)); | |
82d497fc | 1390 | else |
d5db4077 | 1391 | nbytes = SCHARS (string); |
82d497fc KH |
1392 | if (nbytes != size_byte) |
1393 | { | |
2e567bd3 KR |
1394 | unsigned char *tmp = (unsigned char *) alloca (nbytes); |
1395 | copy_text (SDATA (string), tmp, size_byte, | |
82d497fc KH |
1396 | string_multibyte, multibyte); |
1397 | size_byte = nbytes; | |
2e567bd3 | 1398 | str = tmp; |
82d497fc KH |
1399 | } |
1400 | } | |
1401 | ||
195d1361 RS |
1402 | if (NILP (lim)) |
1403 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1404 | else | |
b7826503 | 1405 | CHECK_NUMBER_COERCE_MARKER (lim); |
195d1361 RS |
1406 | |
1407 | /* In any case, don't allow scan outside bounds of buffer. */ | |
195d1361 RS |
1408 | if (XINT (lim) > ZV) |
1409 | XSETFASTINT (lim, ZV); | |
1410 | if (XINT (lim) < BEGV) | |
1411 | XSETFASTINT (lim, BEGV); | |
1412 | ||
195d1361 RS |
1413 | bzero (fastmap, sizeof fastmap); |
1414 | ||
82d497fc | 1415 | i_byte = 0; |
4101e6fe | 1416 | |
13090112 | 1417 | if (i_byte < size_byte |
d5db4077 | 1418 | && SREF (string, 0) == '^') |
195d1361 | 1419 | { |
82d497fc | 1420 | negate = 1; i_byte++; |
195d1361 RS |
1421 | } |
1422 | ||
1423 | /* Find the characters specified and set their elements of fastmap. | |
1424 | If syntaxp, each character counts as itself. | |
1425 | Otherwise, handle backslashes and ranges specially. */ | |
1426 | ||
13090112 | 1427 | while (i_byte < size_byte) |
195d1361 | 1428 | { |
82d497fc KH |
1429 | c = STRING_CHAR_AND_LENGTH (str + i_byte, size_byte - i_byte, len); |
1430 | i_byte += len; | |
4101e6fe | 1431 | |
195d1361 | 1432 | if (syntaxp) |
4101e6fe | 1433 | fastmap[syntax_spec_code[c & 0377]] = 1; |
195d1361 RS |
1434 | else |
1435 | { | |
1436 | if (c == '\\') | |
1437 | { | |
13090112 | 1438 | if (i_byte == size_byte) |
4101e6fe RS |
1439 | break; |
1440 | ||
82d497fc KH |
1441 | c = STRING_CHAR_AND_LENGTH (str+i_byte, size_byte-i_byte, len); |
1442 | i_byte += len; | |
195d1361 | 1443 | } |
13090112 | 1444 | if (i_byte < size_byte |
82d497fc | 1445 | && str[i_byte] == '-') |
195d1361 | 1446 | { |
9690d026 | 1447 | unsigned int c2; |
4101e6fe RS |
1448 | |
1449 | /* Skip over the dash. */ | |
82d497fc | 1450 | i_byte++; |
4101e6fe | 1451 | |
13090112 | 1452 | if (i_byte == size_byte) |
4101e6fe RS |
1453 | break; |
1454 | ||
1455 | /* Get the end of the range. */ | |
82d497fc KH |
1456 | c2 =STRING_CHAR_AND_LENGTH (str+i_byte, size_byte-i_byte, len); |
1457 | i_byte += len; | |
7e68b0ea | 1458 | |
4101e6fe | 1459 | if (SINGLE_BYTE_CHAR_P (c)) |
06274af5 KH |
1460 | { |
1461 | if (! SINGLE_BYTE_CHAR_P (c2)) | |
e39091b6 | 1462 | { |
7ae339a7 KH |
1463 | /* Handle a range starting with a character of |
1464 | less than 256, and ending with a character of | |
1465 | not less than 256. Split that into two | |
1466 | ranges, the low one ending at 0377, and the | |
1467 | high one starting at the smallest character | |
1468 | in the charset of C2 and ending at C2. */ | |
e39091b6 KH |
1469 | int charset = CHAR_CHARSET (c2); |
1470 | int c1 = MAKE_CHAR (charset, 0, 0); | |
1471 | ||
e39091b6 KH |
1472 | char_ranges[n_char_ranges++] = c1; |
1473 | char_ranges[n_char_ranges++] = c2; | |
465cf84c | 1474 | c2 = 0377; |
e39091b6 | 1475 | } |
06274af5 KH |
1476 | while (c <= c2) |
1477 | { | |
1478 | fastmap[c] = 1; | |
1479 | c++; | |
1480 | } | |
1481 | } | |
9690d026 | 1482 | else if (c <= c2) /* Both C and C2 are multibyte char. */ |
195d1361 | 1483 | { |
9690d026 KH |
1484 | char_ranges[n_char_ranges++] = c; |
1485 | char_ranges[n_char_ranges++] = c2; | |
195d1361 | 1486 | } |
195d1361 RS |
1487 | } |
1488 | else | |
7e68b0ea | 1489 | { |
e39091b6 KH |
1490 | if (SINGLE_BYTE_CHAR_P (c)) |
1491 | fastmap[c] = 1; | |
1492 | else | |
7e68b0ea | 1493 | { |
4101e6fe RS |
1494 | char_ranges[n_char_ranges++] = c; |
1495 | char_ranges[n_char_ranges++] = c; | |
7e68b0ea RS |
1496 | } |
1497 | } | |
195d1361 RS |
1498 | } |
1499 | } | |
1500 | ||
9690d026 | 1501 | /* If ^ was the first character, complement the fastmap. */ |
195d1361 RS |
1502 | if (negate) |
1503 | for (i = 0; i < sizeof fastmap; i++) | |
9690d026 | 1504 | fastmap[i] ^= 1; |
195d1361 RS |
1505 | |
1506 | { | |
1507 | int start_point = PT; | |
1508 | int pos = PT; | |
6a140a74 | 1509 | int pos_byte = PT_BYTE; |
9af7511a KH |
1510 | unsigned char *p = PT_ADDR, *endp, *stop; |
1511 | ||
1512 | if (forwardp) | |
1513 | { | |
1514 | endp = (XINT (lim) == GPT) ? GPT_ADDR : CHAR_POS_ADDR (XINT (lim)); | |
1515 | stop = (pos < GPT && GPT < XINT (lim)) ? GPT_ADDR : endp; | |
1516 | } | |
1517 | else | |
1518 | { | |
1519 | endp = CHAR_POS_ADDR (XINT (lim)); | |
1520 | stop = (pos >= GPT && GPT > XINT (lim)) ? GAP_END_ADDR : endp; | |
1521 | } | |
195d1361 RS |
1522 | |
1523 | immediate_quit = 1; | |
1524 | if (syntaxp) | |
1525 | { | |
1526 | SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1); | |
1527 | if (forwardp) | |
1528 | { | |
7e68b0ea | 1529 | if (multibyte) |
9af7511a KH |
1530 | while (1) |
1531 | { | |
1532 | int nbytes; | |
1533 | ||
1534 | if (p >= stop) | |
ee0cdb48 | 1535 | { |
9af7511a KH |
1536 | if (p >= endp) |
1537 | break; | |
1538 | p = GAP_END_ADDR; | |
1539 | stop = endp; | |
ee0cdb48 | 1540 | } |
9af7511a KH |
1541 | c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, nbytes); |
1542 | if (! fastmap[(int) SYNTAX (c)]) | |
1543 | break; | |
1544 | p += nbytes, pos++, pos_byte += nbytes; | |
1545 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1546 | } | |
7e68b0ea | 1547 | else |
9af7511a KH |
1548 | while (1) |
1549 | { | |
1550 | if (p >= stop) | |
1551 | { | |
1552 | if (p >= endp) | |
1553 | break; | |
1554 | p = GAP_END_ADDR; | |
1555 | stop = endp; | |
1556 | } | |
1557 | if (! fastmap[(int) SYNTAX (*p)]) | |
1558 | break; | |
1559 | p++, pos++; | |
1560 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1561 | } | |
195d1361 RS |
1562 | } |
1563 | else | |
1564 | { | |
7e68b0ea | 1565 | if (multibyte) |
9af7511a KH |
1566 | while (1) |
1567 | { | |
1568 | unsigned char *prev_p; | |
1569 | int nbytes; | |
1570 | ||
1571 | if (p <= stop) | |
1572 | { | |
1573 | if (p <= endp) | |
7e68b0ea | 1574 | break; |
9af7511a KH |
1575 | p = GPT_ADDR; |
1576 | stop = endp; | |
1577 | } | |
1578 | prev_p = p; | |
1579 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
1580 | PARSE_MULTIBYTE_SEQ (p, MAX_MULTIBYTE_LENGTH, nbytes); | |
1581 | if (prev_p - p > nbytes) | |
1582 | p = prev_p - 1, c = *p, nbytes = 1; | |
1583 | else | |
1584 | c = STRING_CHAR (p, MAX_MULTIBYTE_LENGTH); | |
1585 | pos--, pos_byte -= nbytes; | |
1586 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
1587 | if (! fastmap[(int) SYNTAX (c)]) | |
1588 | { | |
1589 | pos++; | |
1590 | pos_byte += nbytes; | |
1591 | break; | |
1592 | } | |
1593 | } | |
7e68b0ea | 1594 | else |
9af7511a KH |
1595 | while (1) |
1596 | { | |
1597 | if (p <= stop) | |
ee0cdb48 | 1598 | { |
9af7511a | 1599 | if (p <= endp) |
4c8535eb | 1600 | break; |
9af7511a KH |
1601 | p = GPT_ADDR; |
1602 | stop = endp; | |
ee0cdb48 | 1603 | } |
9af7511a KH |
1604 | if (! fastmap[(int) SYNTAX (p[-1])]) |
1605 | break; | |
1606 | p--, pos--; | |
1607 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); | |
1608 | } | |
195d1361 RS |
1609 | } |
1610 | } | |
1611 | else | |
1612 | { | |
1613 | if (forwardp) | |
1614 | { | |
7e68b0ea | 1615 | if (multibyte) |
9af7511a | 1616 | while (1) |
7e68b0ea | 1617 | { |
9af7511a KH |
1618 | int nbytes; |
1619 | ||
1620 | if (p >= stop) | |
1621 | { | |
1622 | if (p >= endp) | |
1623 | break; | |
1624 | p = GAP_END_ADDR; | |
1625 | stop = endp; | |
1626 | } | |
1627 | c = STRING_CHAR_AND_LENGTH (p, MAX_MULTIBYTE_LENGTH, nbytes); | |
9690d026 | 1628 | if (SINGLE_BYTE_CHAR_P (c)) |
7e68b0ea | 1629 | { |
9690d026 KH |
1630 | if (!fastmap[c]) |
1631 | break; | |
1632 | } | |
1633 | else | |
1634 | { | |
1635 | /* If we are looking at a multibyte character, | |
1636 | we must look up the character in the table | |
1637 | CHAR_RANGES. If there's no data in the | |
1638 | table, that character is not what we want to | |
1639 | skip. */ | |
1640 | ||
e39091b6 KH |
1641 | /* The following code do the right thing even if |
1642 | n_char_ranges is zero (i.e. no data in | |
1643 | CHAR_RANGES). */ | |
7e68b0ea | 1644 | for (i = 0; i < n_char_ranges; i += 2) |
e39091b6 | 1645 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) |
7e68b0ea RS |
1646 | break; |
1647 | if (!(negate ^ (i < n_char_ranges))) | |
1648 | break; | |
7e68b0ea | 1649 | } |
9af7511a | 1650 | p += nbytes, pos++, pos_byte += nbytes; |
7e68b0ea RS |
1651 | } |
1652 | else | |
9af7511a KH |
1653 | while (1) |
1654 | { | |
1655 | if (p >= stop) | |
1656 | { | |
1657 | if (p >= endp) | |
1658 | break; | |
1659 | p = GAP_END_ADDR; | |
1660 | stop = endp; | |
1661 | } | |
4e837cd0 | 1662 | if (!fastmap[*p]) |
9af7511a KH |
1663 | break; |
1664 | p++, pos++; | |
1665 | } | |
195d1361 RS |
1666 | } |
1667 | else | |
1668 | { | |
7e68b0ea | 1669 | if (multibyte) |
9af7511a | 1670 | while (1) |
7e68b0ea | 1671 | { |
9af7511a KH |
1672 | unsigned char *prev_p; |
1673 | int nbytes; | |
e39091b6 | 1674 | |
9af7511a KH |
1675 | if (p <= stop) |
1676 | { | |
1677 | if (p <= endp) | |
1678 | break; | |
1679 | p = GPT_ADDR; | |
1680 | stop = endp; | |
1681 | } | |
1682 | prev_p = p; | |
1683 | while (--p >= stop && ! CHAR_HEAD_P (*p)); | |
1684 | PARSE_MULTIBYTE_SEQ (p, MAX_MULTIBYTE_LENGTH, nbytes); | |
1685 | if (prev_p - p > nbytes) | |
1686 | p = prev_p - 1, c = *p, nbytes = 1; | |
1687 | else | |
1688 | c = STRING_CHAR (p, MAX_MULTIBYTE_LENGTH); | |
9690d026 KH |
1689 | if (SINGLE_BYTE_CHAR_P (c)) |
1690 | { | |
1691 | if (!fastmap[c]) | |
1692 | break; | |
1693 | } | |
1694 | else | |
7e68b0ea | 1695 | { |
9690d026 | 1696 | /* See the comment in the previous similar code. */ |
e39091b6 KH |
1697 | for (i = 0; i < n_char_ranges; i += 2) |
1698 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
1699 | break; | |
1700 | if (!(negate ^ (i < n_char_ranges))) | |
1701 | break; | |
7e68b0ea | 1702 | } |
9af7511a | 1703 | pos--, pos_byte -= nbytes; |
7e68b0ea RS |
1704 | } |
1705 | else | |
9af7511a KH |
1706 | while (1) |
1707 | { | |
1708 | if (p <= stop) | |
1709 | { | |
1710 | if (p <= endp) | |
1711 | break; | |
1712 | p = GPT_ADDR; | |
1713 | stop = endp; | |
1714 | } | |
4e837cd0 | 1715 | if (!fastmap[p[-1]]) |
9af7511a KH |
1716 | break; |
1717 | p--, pos--; | |
1718 | } | |
195d1361 RS |
1719 | } |
1720 | } | |
7e68b0ea | 1721 | |
6a140a74 RS |
1722 | #if 0 /* Not needed now that a position in mid-character |
1723 | cannot be specified in Lisp. */ | |
7e68b0ea RS |
1724 | if (multibyte |
1725 | /* INC_POS or DEC_POS might have moved POS over LIM. */ | |
1726 | && (forwardp ? (pos > XINT (lim)) : (pos < XINT (lim)))) | |
1727 | pos = XINT (lim); | |
6a140a74 | 1728 | #endif |
7e68b0ea | 1729 | |
6a140a74 RS |
1730 | if (! multibyte) |
1731 | pos_byte = pos; | |
1732 | ||
1733 | SET_PT_BOTH (pos, pos_byte); | |
195d1361 RS |
1734 | immediate_quit = 0; |
1735 | ||
1736 | return make_number (PT - start_point); | |
1737 | } | |
1738 | } | |
1739 | \f | |
95ff8dfc RS |
1740 | /* Jump over a comment, assuming we are at the beginning of one. |
1741 | FROM is the current position. | |
1742 | FROM_BYTE is the bytepos corresponding to FROM. | |
1743 | Do not move past STOP (a charpos). | |
1744 | The comment over which we have to jump is of style STYLE | |
1745 | (either SYNTAX_COMMENT_STYLE(foo) or ST_COMMENT_STYLE). | |
1746 | NESTING should be positive to indicate the nesting at the beginning | |
1747 | for nested comments and should be zero or negative else. | |
1748 | ST_COMMENT_STYLE cannot be nested. | |
1749 | PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character | |
1750 | (or 0 If the search cannot start in the middle of a two-character). | |
1751 | ||
1752 | If successful, return 1 and store the charpos of the comment's end | |
1753 | into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR. | |
1754 | Else, return 0 and store the charpos STOP into *CHARPOS_PTR, the | |
1755 | corresponding bytepos into *BYTEPOS_PTR and the current nesting | |
1756 | (as defined for state.incomment) in *INCOMMENT_PTR. | |
1757 | ||
1758 | The comment end is the last character of the comment rather than the | |
1759 | character just after the comment. | |
1760 | ||
1761 | Global syntax data is assumed to initially be valid for FROM and | |
1762 | remains valid for forward search starting at the returned position. */ | |
1763 | ||
1764 | static int | |
1765 | forw_comment (from, from_byte, stop, nesting, style, prev_syntax, | |
1766 | charpos_ptr, bytepos_ptr, incomment_ptr) | |
1767 | int from, from_byte, stop; | |
1768 | int nesting, style, prev_syntax; | |
1769 | int *charpos_ptr, *bytepos_ptr, *incomment_ptr; | |
1770 | { | |
1771 | register int c, c1; | |
1772 | register enum syntaxcode code; | |
1773 | register int syntax; | |
1774 | ||
1775 | if (nesting <= 0) nesting = -1; | |
1776 | ||
1777 | /* Enter the loop in the middle so that we find | |
1778 | a 2-char comment ender if we start in the middle of it. */ | |
1779 | syntax = prev_syntax; | |
1780 | if (syntax != 0) goto forw_incomment; | |
1781 | ||
1782 | while (1) | |
1783 | { | |
1784 | if (from == stop) | |
1785 | { | |
1786 | *incomment_ptr = nesting; | |
1787 | *charpos_ptr = from; | |
1788 | *bytepos_ptr = from_byte; | |
1789 | return 0; | |
1790 | } | |
1791 | c = FETCH_CHAR (from_byte); | |
1792 | syntax = SYNTAX_WITH_FLAGS (c); | |
1793 | code = syntax & 0xff; | |
1794 | if (code == Sendcomment | |
1795 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
abf8a9ff SM |
1796 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) ? |
1797 | (nesting > 0 && --nesting == 0) : nesting < 0)) | |
95ff8dfc RS |
1798 | /* we have encountered a comment end of the same style |
1799 | as the comment sequence which began this comment | |
1800 | section */ | |
1801 | break; | |
1802 | if (code == Scomment_fence | |
1803 | && style == ST_COMMENT_STYLE) | |
1804 | /* we have encountered a comment end of the same style | |
1805 | as the comment sequence which began this comment | |
1806 | section. */ | |
1807 | break; | |
1808 | if (nesting > 0 | |
1809 | && code == Scomment | |
abf8a9ff | 1810 | && SYNTAX_FLAGS_COMMENT_NESTED (syntax) |
95ff8dfc RS |
1811 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style) |
1812 | /* we have encountered a nested comment of the same style | |
1813 | as the comment sequence which began this comment section */ | |
1814 | nesting++; | |
1815 | INC_BOTH (from, from_byte); | |
1816 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
7d0393cf | 1817 | |
95ff8dfc RS |
1818 | forw_incomment: |
1819 | if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
1820 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
1821 | && (c1 = FETCH_CHAR (from_byte), | |
abf8a9ff SM |
1822 | SYNTAX_COMEND_SECOND (c1)) |
1823 | && ((SYNTAX_FLAGS_COMMENT_NESTED (syntax) || | |
1824 | SYNTAX_COMMENT_NESTED (c1)) ? nesting > 0 : nesting < 0)) | |
4ffe723b GM |
1825 | { |
1826 | if (--nesting <= 0) | |
1827 | /* we have encountered a comment end of the same style | |
1828 | as the comment sequence which began this comment | |
1829 | section */ | |
1830 | break; | |
1831 | else | |
1832 | { | |
1833 | INC_BOTH (from, from_byte); | |
1834 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1835 | } | |
1836 | } | |
95ff8dfc RS |
1837 | if (nesting > 0 |
1838 | && from < stop | |
1839 | && SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
1840 | && (c1 = FETCH_CHAR (from_byte), | |
1841 | SYNTAX_COMMENT_STYLE (c1) == style | |
abf8a9ff SM |
1842 | && SYNTAX_COMSTART_SECOND (c1)) |
1843 | && (SYNTAX_FLAGS_COMMENT_NESTED (syntax) || | |
1844 | SYNTAX_COMMENT_NESTED (c1))) | |
95ff8dfc RS |
1845 | /* we have encountered a nested comment of the same style |
1846 | as the comment sequence which began this comment | |
1847 | section */ | |
1848 | { | |
1849 | INC_BOTH (from, from_byte); | |
1850 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1851 | nesting++; | |
1852 | } | |
1853 | } | |
1854 | *charpos_ptr = from; | |
1855 | *bytepos_ptr = from_byte; | |
1856 | return 1; | |
1857 | } | |
1858 | ||
b3cfe0c8 | 1859 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
177c0ea7 | 1860 | doc: /* |
ee648c11 | 1861 | Move forward across up to COUNT comments. If COUNT is negative, move backward. |
fdb82f93 PJ |
1862 | Stop scanning if we find something other than a comment or whitespace. |
1863 | Set point to where scanning stops. | |
ee648c11 | 1864 | If COUNT comments are found as expected, with nothing except whitespace |
fdb82f93 PJ |
1865 | between them, return t; otherwise return nil. */) |
1866 | (count) | |
840f481c | 1867 | Lisp_Object count; |
b3cfe0c8 RS |
1868 | { |
1869 | register int from; | |
6a140a74 | 1870 | int from_byte; |
b3cfe0c8 | 1871 | register int stop; |
8ea151b2 | 1872 | register int c, c1; |
b3cfe0c8 RS |
1873 | register enum syntaxcode code; |
1874 | int comstyle = 0; /* style of comment encountered */ | |
95ff8dfc | 1875 | int comnested = 0; /* whether the comment is nestable or not */ |
be720845 | 1876 | int found; |
840f481c | 1877 | int count1; |
6a140a74 | 1878 | int out_charpos, out_bytepos; |
95ff8dfc | 1879 | int dummy; |
840f481c | 1880 | |
b7826503 | 1881 | CHECK_NUMBER (count); |
840f481c | 1882 | count1 = XINT (count); |
195d1361 | 1883 | stop = count1 > 0 ? ZV : BEGV; |
b3cfe0c8 RS |
1884 | |
1885 | immediate_quit = 1; | |
1886 | QUIT; | |
1887 | ||
1888 | from = PT; | |
6a140a74 | 1889 | from_byte = PT_BYTE; |
b3cfe0c8 | 1890 | |
195d1361 | 1891 | SETUP_SYNTAX_TABLE (from, count1); |
840f481c | 1892 | while (count1 > 0) |
b3cfe0c8 | 1893 | { |
04882296 | 1894 | do |
b3cfe0c8 | 1895 | { |
f902a008 RS |
1896 | int comstart_first; |
1897 | ||
04882296 KH |
1898 | if (from == stop) |
1899 | { | |
ef316cf0 | 1900 | SET_PT_BOTH (from, from_byte); |
b7e6e612 | 1901 | immediate_quit = 0; |
04882296 KH |
1902 | return Qnil; |
1903 | } | |
6a140a74 | 1904 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 | 1905 | code = SYNTAX (c); |
f902a008 | 1906 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 1907 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 1908 | comstyle = SYNTAX_COMMENT_STYLE (c); |
6a140a74 | 1909 | INC_BOTH (from, from_byte); |
f902a008 | 1910 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 1911 | if (from < stop && comstart_first |
6a140a74 | 1912 | && (c1 = FETCH_CHAR (from_byte), |
8ea151b2 | 1913 | SYNTAX_COMSTART_SECOND (c1))) |
b3cfe0c8 | 1914 | { |
7d0393cf | 1915 | /* We have encountered a comment start sequence and we |
7fc8191e | 1916 | are ignoring all text inside comments. We must record |
b3cfe0c8 RS |
1917 | the comment style this sequence begins so that later, |
1918 | only a comment end of the same style actually ends | |
7fc8191e | 1919 | the comment section. */ |
b3cfe0c8 | 1920 | code = Scomment; |
8ea151b2 | 1921 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
95ff8dfc | 1922 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); |
6a140a74 | 1923 | INC_BOTH (from, from_byte); |
95ff8dfc | 1924 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 1925 | } |
04882296 | 1926 | } |
abf8a9ff | 1927 | while (code == Swhitespace || (code == Sendcomment && c == '\n')); |
6a140a74 | 1928 | |
da71ab91 KH |
1929 | if (code == Scomment_fence) |
1930 | comstyle = ST_COMMENT_STYLE; | |
1931 | else if (code != Scomment) | |
04882296 KH |
1932 | { |
1933 | immediate_quit = 0; | |
6a140a74 | 1934 | DEC_BOTH (from, from_byte); |
ef316cf0 | 1935 | SET_PT_BOTH (from, from_byte); |
04882296 KH |
1936 | return Qnil; |
1937 | } | |
1938 | /* We're at the start of a comment. */ | |
95ff8dfc RS |
1939 | found = forw_comment (from, from_byte, stop, comnested, comstyle, 0, |
1940 | &out_charpos, &out_bytepos, &dummy); | |
1941 | from = out_charpos; from_byte = out_bytepos; | |
1942 | if (!found) | |
04882296 | 1943 | { |
95ff8dfc RS |
1944 | immediate_quit = 0; |
1945 | SET_PT_BOTH (from, from_byte); | |
1946 | return Qnil; | |
b3cfe0c8 | 1947 | } |
95ff8dfc RS |
1948 | INC_BOTH (from, from_byte); |
1949 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
04882296 | 1950 | /* We have skipped one comment. */ |
840f481c | 1951 | count1--; |
b3cfe0c8 RS |
1952 | } |
1953 | ||
840f481c | 1954 | while (count1 < 0) |
b3cfe0c8 | 1955 | { |
b9145dbb | 1956 | while (1) |
b3cfe0c8 | 1957 | { |
c65adb44 | 1958 | int quoted; |
f902a008 | 1959 | |
b9145dbb RS |
1960 | if (from <= stop) |
1961 | { | |
6a140a74 | 1962 | SET_PT_BOTH (BEGV, BEGV_BYTE); |
b9145dbb RS |
1963 | immediate_quit = 0; |
1964 | return Qnil; | |
1965 | } | |
b3cfe0c8 | 1966 | |
6a140a74 | 1967 | DEC_BOTH (from, from_byte); |
f902a008 | 1968 | /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */ |
6a140a74 | 1969 | quoted = char_quoted (from, from_byte); |
6a140a74 | 1970 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 RS |
1971 | code = SYNTAX (c); |
1972 | comstyle = 0; | |
95ff8dfc | 1973 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
1974 | if (code == Sendcomment) |
1975 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
b3cfe0c8 | 1976 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
f902a008 | 1977 | && prev_char_comend_first (from, from_byte) |
89c6809a | 1978 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
b3cfe0c8 | 1979 | { |
7fc8191e | 1980 | /* We must record the comment style encountered so that |
b3cfe0c8 | 1981 | later, we can match only the proper comment begin |
7fc8191e | 1982 | sequence of the same style. */ |
6a140a74 | 1983 | DEC_BOTH (from, from_byte); |
f902a008 RS |
1984 | code = Sendcomment; |
1985 | /* Calling char_quoted, above, set up global syntax position | |
1986 | at the new value of FROM. */ | |
95ff8dfc RS |
1987 | c1 = FETCH_CHAR (from_byte); |
1988 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
1989 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
b3cfe0c8 RS |
1990 | } |
1991 | ||
195d1361 RS |
1992 | if (code == Scomment_fence) |
1993 | { | |
1994 | /* Skip until first preceding unquoted comment_fence. */ | |
6a140a74 | 1995 | int found = 0, ini = from, ini_byte = from_byte; |
7d0393cf | 1996 | |
6a140a74 | 1997 | while (1) |
195d1361 | 1998 | { |
6a140a74 RS |
1999 | DEC_BOTH (from, from_byte); |
2000 | if (from == stop) | |
2001 | break; | |
195d1361 | 2002 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 RS |
2003 | c = FETCH_CHAR (from_byte); |
2004 | if (SYNTAX (c) == Scomment_fence | |
7d0393cf | 2005 | && !char_quoted (from, from_byte)) |
195d1361 | 2006 | { |
7d0393cf | 2007 | found = 1; |
195d1361 RS |
2008 | break; |
2009 | } | |
2010 | } | |
2011 | if (found == 0) | |
2012 | { | |
2013 | from = ini; /* Set point to ini + 1. */ | |
6a140a74 | 2014 | from_byte = ini_byte; |
195d1361 RS |
2015 | goto leave; |
2016 | } | |
2017 | } | |
2018 | else if (code == Sendcomment) | |
b3cfe0c8 | 2019 | { |
95ff8dfc | 2020 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2021 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2022 | if (found == -1) |
2023 | { | |
abf8a9ff SM |
2024 | if (c == '\n') |
2025 | /* This end-of-line is not an end-of-comment. | |
2026 | Treat it like a whitespace. | |
2027 | CC-mode (and maybe others) relies on this behavior. */ | |
2028 | ; | |
2029 | else | |
2030 | { | |
2031 | /* Failure: we should go back to the end of this | |
2032 | not-quite-endcomment. */ | |
2033 | if (SYNTAX(c) != code) | |
2034 | /* It was a two-char Sendcomment. */ | |
2035 | INC_BOTH (from, from_byte); | |
2036 | goto leave; | |
2037 | } | |
1aa963c8 | 2038 | } |
2b927d02 | 2039 | else |
abf8a9ff SM |
2040 | { |
2041 | /* We have skipped one comment. */ | |
2042 | from = out_charpos, from_byte = out_bytepos; | |
2043 | break; | |
2044 | } | |
b3cfe0c8 | 2045 | } |
bb0de084 | 2046 | else if (code != Swhitespace || quoted) |
b3cfe0c8 | 2047 | { |
195d1361 | 2048 | leave: |
b3cfe0c8 | 2049 | immediate_quit = 0; |
6a140a74 | 2050 | INC_BOTH (from, from_byte); |
ef316cf0 | 2051 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2052 | return Qnil; |
2053 | } | |
2054 | } | |
2055 | ||
840f481c | 2056 | count1++; |
b3cfe0c8 RS |
2057 | } |
2058 | ||
ef316cf0 | 2059 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
2060 | immediate_quit = 0; |
2061 | return Qt; | |
2062 | } | |
2063 | \f | |
bd25db08 | 2064 | /* Return syntax code of character C if C is a single byte character |
db9f48c3 | 2065 | or `multibyte_symbol_p' is zero. Otherwise, return Ssymbol. */ |
bd25db08 KH |
2066 | |
2067 | #define SYNTAX_WITH_MULTIBYTE_CHECK(c) \ | |
2068 | ((SINGLE_BYTE_CHAR_P (c) || !multibyte_symbol_p) \ | |
2069 | ? SYNTAX (c) : Ssymbol) | |
2070 | ||
6a140a74 | 2071 | static Lisp_Object |
8489eb67 RS |
2072 | scan_lists (from, count, depth, sexpflag) |
2073 | register int from; | |
2074 | int count, depth, sexpflag; | |
2075 | { | |
2076 | Lisp_Object val; | |
195d1361 | 2077 | register int stop = count > 0 ? ZV : BEGV; |
93da5fff KH |
2078 | register int c, c1; |
2079 | int stringterm; | |
8489eb67 RS |
2080 | int quoted; |
2081 | int mathexit = 0; | |
93da5fff | 2082 | register enum syntaxcode code, temp_code; |
195d1361 | 2083 | int min_depth = depth; /* Err out if depth gets less than this. */ |
e5d4f4dc | 2084 | int comstyle = 0; /* style of comment encountered */ |
95ff8dfc | 2085 | int comnested = 0; /* whether the comment is nestable or not */ |
93da5fff | 2086 | int temp_pos; |
7bf5e9e4 | 2087 | int last_good = from; |
195d1361 | 2088 | int found; |
c3907a7e | 2089 | int from_byte; |
6a140a74 | 2090 | int out_bytepos, out_charpos; |
95ff8dfc | 2091 | int temp, dummy; |
bd25db08 | 2092 | int multibyte_symbol_p = sexpflag && multibyte_syntax_as_symbol; |
8489eb67 RS |
2093 | |
2094 | if (depth > 0) min_depth = 0; | |
2095 | ||
c3907a7e RS |
2096 | if (from > ZV) from = ZV; |
2097 | if (from < BEGV) from = BEGV; | |
2098 | ||
2099 | from_byte = CHAR_TO_BYTE (from); | |
2100 | ||
8489eb67 RS |
2101 | immediate_quit = 1; |
2102 | QUIT; | |
2103 | ||
195d1361 | 2104 | SETUP_SYNTAX_TABLE (from, count); |
8489eb67 RS |
2105 | while (count > 0) |
2106 | { | |
8489eb67 RS |
2107 | while (from < stop) |
2108 | { | |
f902a008 | 2109 | int comstart_first, prefix; |
195d1361 | 2110 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 2111 | c = FETCH_CHAR (from_byte); |
bd25db08 | 2112 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
f902a008 | 2113 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 2114 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 2115 | comstyle = SYNTAX_COMMENT_STYLE (c); |
f902a008 | 2116 | prefix = SYNTAX_PREFIX (c); |
7bf5e9e4 RS |
2117 | if (depth == min_depth) |
2118 | last_good = from; | |
6a140a74 | 2119 | INC_BOTH (from, from_byte); |
195d1361 | 2120 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2121 | if (from < stop && comstart_first |
6a140a74 | 2122 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from_byte)) |
8489eb67 | 2123 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2124 | { |
7d0393cf | 2125 | /* we have encountered a comment start sequence and we |
195d1361 | 2126 | are ignoring all text inside comments. We must record |
e5d4f4dc RS |
2127 | the comment style this sequence begins so that later, |
2128 | only a comment end of the same style actually ends | |
2129 | the comment section */ | |
2130 | code = Scomment; | |
95ff8dfc RS |
2131 | c1 = FETCH_CHAR (from_byte); |
2132 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
2133 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
6a140a74 | 2134 | INC_BOTH (from, from_byte); |
f902a008 | 2135 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
e5d4f4dc | 2136 | } |
7d0393cf | 2137 | |
f902a008 | 2138 | if (prefix) |
8489eb67 RS |
2139 | continue; |
2140 | ||
0220c518 | 2141 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2142 | { |
2143 | case Sescape: | |
2144 | case Scharquote: | |
2145 | if (from == stop) goto lose; | |
6a140a74 | 2146 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2147 | /* treat following character as a word constituent */ |
2148 | case Sword: | |
2149 | case Ssymbol: | |
2150 | if (depth || !sexpflag) break; | |
195d1361 | 2151 | /* This word counts as a sexp; return at end of it. */ |
8489eb67 RS |
2152 | while (from < stop) |
2153 | { | |
195d1361 | 2154 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
7c7ca3d2 RS |
2155 | |
2156 | /* Some compilers can't handle this inside the switch. */ | |
bd25db08 KH |
2157 | c = FETCH_CHAR (from_byte); |
2158 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); | |
7c7ca3d2 | 2159 | switch (temp) |
8489eb67 RS |
2160 | { |
2161 | case Scharquote: | |
2162 | case Sescape: | |
6a140a74 | 2163 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2164 | if (from == stop) goto lose; |
2165 | break; | |
2166 | case Sword: | |
2167 | case Ssymbol: | |
2168 | case Squote: | |
2169 | break; | |
2170 | default: | |
2171 | goto done; | |
2172 | } | |
6a140a74 | 2173 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2174 | } |
2175 | goto done; | |
2176 | ||
195d1361 | 2177 | case Scomment_fence: |
95ff8dfc RS |
2178 | comstyle = ST_COMMENT_STYLE; |
2179 | /* FALLTHROUGH */ | |
2180 | case Scomment: | |
8489eb67 | 2181 | if (!parse_sexp_ignore_comments) break; |
95ff8dfc RS |
2182 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2183 | found = forw_comment (from, from_byte, stop, | |
2184 | comnested, comstyle, 0, | |
2185 | &out_charpos, &out_bytepos, &dummy); | |
2186 | from = out_charpos, from_byte = out_bytepos; | |
2187 | if (!found) | |
8489eb67 | 2188 | { |
95ff8dfc RS |
2189 | if (depth == 0) |
2190 | goto done; | |
2191 | goto lose; | |
8489eb67 | 2192 | } |
95ff8dfc RS |
2193 | INC_BOTH (from, from_byte); |
2194 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
8489eb67 RS |
2195 | break; |
2196 | ||
2197 | case Smath: | |
2198 | if (!sexpflag) | |
2199 | break; | |
6a140a74 RS |
2200 | if (from != stop && c == FETCH_CHAR (from_byte)) |
2201 | { | |
2202 | INC_BOTH (from, from_byte); | |
2203 | } | |
8489eb67 RS |
2204 | if (mathexit) |
2205 | { | |
2206 | mathexit = 0; | |
2207 | goto close1; | |
2208 | } | |
2209 | mathexit = 1; | |
2210 | ||
2211 | case Sopen: | |
2212 | if (!++depth) goto done; | |
2213 | break; | |
2214 | ||
2215 | case Sclose: | |
2216 | close1: | |
2217 | if (!--depth) goto done; | |
2218 | if (depth < min_depth) | |
7bf5e9e4 RS |
2219 | Fsignal (Qscan_error, |
2220 | Fcons (build_string ("Containing expression ends prematurely"), | |
2221 | Fcons (make_number (last_good), | |
2222 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2223 | break; |
2224 | ||
2225 | case Sstring: | |
195d1361 | 2226 | case Sstring_fence: |
ef316cf0 | 2227 | temp_pos = dec_bytepos (from_byte); |
93da5fff | 2228 | stringterm = FETCH_CHAR (temp_pos); |
8489eb67 RS |
2229 | while (1) |
2230 | { | |
2231 | if (from >= stop) goto lose; | |
195d1361 | 2232 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
bd25db08 | 2233 | c = FETCH_CHAR (from_byte); |
42ebfa31 SM |
2234 | if (code == Sstring |
2235 | ? (c == stringterm | |
2236 | && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring) | |
bd25db08 | 2237 | : SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring_fence) |
195d1361 | 2238 | break; |
7c7ca3d2 RS |
2239 | |
2240 | /* Some compilers can't handle this inside the switch. */ | |
bd25db08 | 2241 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7c7ca3d2 | 2242 | switch (temp) |
8489eb67 RS |
2243 | { |
2244 | case Scharquote: | |
2245 | case Sescape: | |
6a140a74 | 2246 | INC_BOTH (from, from_byte); |
8489eb67 | 2247 | } |
6a140a74 | 2248 | INC_BOTH (from, from_byte); |
8489eb67 | 2249 | } |
6a140a74 | 2250 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2251 | if (!depth && sexpflag) goto done; |
2252 | break; | |
240c43e8 SM |
2253 | default: |
2254 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2255 | break; | |
8489eb67 RS |
2256 | } |
2257 | } | |
2258 | ||
2259 | /* Reached end of buffer. Error if within object, return nil if between */ | |
2260 | if (depth) goto lose; | |
2261 | ||
2262 | immediate_quit = 0; | |
2263 | return Qnil; | |
2264 | ||
2265 | /* End of object reached */ | |
2266 | done: | |
2267 | count--; | |
2268 | } | |
2269 | ||
2270 | while (count < 0) | |
2271 | { | |
8489eb67 RS |
2272 | while (from > stop) |
2273 | { | |
6a140a74 | 2274 | DEC_BOTH (from, from_byte); |
195d1361 | 2275 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 2276 | c = FETCH_CHAR (from_byte); |
bd25db08 | 2277 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7bf5e9e4 RS |
2278 | if (depth == min_depth) |
2279 | last_good = from; | |
7fc8191e | 2280 | comstyle = 0; |
95ff8dfc | 2281 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2282 | if (code == Sendcomment) |
2283 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 | 2284 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1674d9a2 | 2285 | && prev_char_comend_first (from, from_byte) |
8489eb67 | 2286 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2287 | { |
f902a008 | 2288 | /* We must record the comment style encountered so that |
e5d4f4dc | 2289 | later, we can match only the proper comment begin |
f902a008 | 2290 | sequence of the same style. */ |
6a140a74 | 2291 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2292 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
2293 | code = Sendcomment; | |
95ff8dfc RS |
2294 | c1 = FETCH_CHAR (from_byte); |
2295 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
2296 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
e5d4f4dc | 2297 | } |
7d0393cf | 2298 | |
9828a477 | 2299 | /* Quoting turns anything except a comment-ender |
e6365855 | 2300 | into a word character. Note that this cannot be true |
f902a008 | 2301 | if we decremented FROM in the if-statement above. */ |
9828a477 | 2302 | if (code != Sendcomment && char_quoted (from, from_byte)) |
240c43e8 SM |
2303 | { |
2304 | DEC_BOTH (from, from_byte); | |
2305 | code = Sword; | |
2306 | } | |
9828a477 | 2307 | else if (SYNTAX_PREFIX (c)) |
8489eb67 RS |
2308 | continue; |
2309 | ||
9828a477 | 2310 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2311 | { |
2312 | case Sword: | |
2313 | case Ssymbol: | |
9828a477 KH |
2314 | case Sescape: |
2315 | case Scharquote: | |
8489eb67 | 2316 | if (depth || !sexpflag) break; |
195d1361 RS |
2317 | /* This word counts as a sexp; count object finished |
2318 | after passing it. */ | |
8489eb67 RS |
2319 | while (from > stop) |
2320 | { | |
6a140a74 | 2321 | temp_pos = from_byte; |
ef316cf0 RS |
2322 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2323 | DEC_POS (temp_pos); | |
2324 | else | |
2325 | temp_pos--; | |
6a140a74 | 2326 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
9828a477 | 2327 | c1 = FETCH_CHAR (temp_pos); |
bd25db08 | 2328 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
9828a477 KH |
2329 | /* Don't allow comment-end to be quoted. */ |
2330 | if (temp_code == Sendcomment) | |
2331 | goto done2; | |
6a140a74 | 2332 | quoted = char_quoted (from - 1, temp_pos); |
8489eb67 | 2333 | if (quoted) |
93da5fff | 2334 | { |
6a140a74 | 2335 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2336 | temp_pos = dec_bytepos (temp_pos); |
6a140a74 | 2337 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff KH |
2338 | } |
2339 | c1 = FETCH_CHAR (temp_pos); | |
bd25db08 | 2340 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
93da5fff KH |
2341 | if (! (quoted || temp_code == Sword |
2342 | || temp_code == Ssymbol | |
2343 | || temp_code == Squote)) | |
8489eb67 | 2344 | goto done2; |
6a140a74 | 2345 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2346 | } |
2347 | goto done2; | |
2348 | ||
2349 | case Smath: | |
2350 | if (!sexpflag) | |
2351 | break; | |
ef316cf0 | 2352 | temp_pos = dec_bytepos (from_byte); |
6a140a74 | 2353 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff | 2354 | if (from != stop && c == FETCH_CHAR (temp_pos)) |
6a140a74 | 2355 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2356 | if (mathexit) |
2357 | { | |
2358 | mathexit = 0; | |
2359 | goto open2; | |
2360 | } | |
2361 | mathexit = 1; | |
2362 | ||
2363 | case Sclose: | |
2364 | if (!++depth) goto done2; | |
2365 | break; | |
2366 | ||
2367 | case Sopen: | |
2368 | open2: | |
2369 | if (!--depth) goto done2; | |
2370 | if (depth < min_depth) | |
7bf5e9e4 RS |
2371 | Fsignal (Qscan_error, |
2372 | Fcons (build_string ("Containing expression ends prematurely"), | |
2373 | Fcons (make_number (last_good), | |
2374 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2375 | break; |
2376 | ||
2377 | case Sendcomment: | |
2378 | if (!parse_sexp_ignore_comments) | |
2379 | break; | |
95ff8dfc | 2380 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2381 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2382 | /* FIXME: if found == -1, then it really wasn't a comment-end. |
2383 | For single-char Sendcomment, we can't do much about it apart | |
2384 | from skipping the char. | |
2385 | For 2-char endcomments, we could try again, taking both | |
2386 | chars as separate entities, but it's a lot of trouble | |
2387 | for very little gain, so we don't bother either. -sm */ | |
6a140a74 RS |
2388 | if (found != -1) |
2389 | from = out_charpos, from_byte = out_bytepos; | |
8489eb67 RS |
2390 | break; |
2391 | ||
195d1361 RS |
2392 | case Scomment_fence: |
2393 | case Sstring_fence: | |
2394 | while (1) | |
2395 | { | |
6a140a74 | 2396 | DEC_BOTH (from, from_byte); |
195d1361 RS |
2397 | if (from == stop) goto lose; |
2398 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
7d0393cf | 2399 | if (!char_quoted (from, from_byte) |
bd25db08 KH |
2400 | && (c = FETCH_CHAR (from_byte), |
2401 | SYNTAX_WITH_MULTIBYTE_CHECK (c) == code)) | |
195d1361 RS |
2402 | break; |
2403 | } | |
2404 | if (code == Sstring_fence && !depth && sexpflag) goto done2; | |
2405 | break; | |
7d0393cf | 2406 | |
8489eb67 | 2407 | case Sstring: |
6a140a74 | 2408 | stringterm = FETCH_CHAR (from_byte); |
8489eb67 RS |
2409 | while (1) |
2410 | { | |
2411 | if (from == stop) goto lose; | |
6a140a74 | 2412 | temp_pos = from_byte; |
ef316cf0 RS |
2413 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2414 | DEC_POS (temp_pos); | |
2415 | else | |
2416 | temp_pos--; | |
6a140a74 RS |
2417 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
2418 | if (!char_quoted (from - 1, temp_pos) | |
42ebfa31 SM |
2419 | && stringterm == (c = FETCH_CHAR (temp_pos)) |
2420 | && SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring) | |
8489eb67 | 2421 | break; |
6a140a74 | 2422 | DEC_BOTH (from, from_byte); |
8489eb67 | 2423 | } |
6a140a74 | 2424 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2425 | if (!depth && sexpflag) goto done2; |
2426 | break; | |
240c43e8 SM |
2427 | default: |
2428 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
2429 | break; | |
8489eb67 RS |
2430 | } |
2431 | } | |
2432 | ||
2433 | /* Reached start of buffer. Error if within object, return nil if between */ | |
2434 | if (depth) goto lose; | |
2435 | ||
2436 | immediate_quit = 0; | |
2437 | return Qnil; | |
2438 | ||
2439 | done2: | |
2440 | count++; | |
2441 | } | |
2442 | ||
2443 | ||
2444 | immediate_quit = 0; | |
1e142fb7 | 2445 | XSETFASTINT (val, from); |
8489eb67 RS |
2446 | return val; |
2447 | ||
2448 | lose: | |
7bf5e9e4 RS |
2449 | Fsignal (Qscan_error, |
2450 | Fcons (build_string ("Unbalanced parentheses"), | |
2451 | Fcons (make_number (last_good), | |
2452 | Fcons (make_number (from), Qnil)))); | |
2453 | ||
8489eb67 RS |
2454 | /* NOTREACHED */ |
2455 | } | |
2456 | ||
8489eb67 | 2457 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, |
fdb82f93 PJ |
2458 | doc: /* Scan from character number FROM by COUNT lists. |
2459 | Returns the character number of the position thus found. | |
2460 | ||
2461 | If DEPTH is nonzero, paren depth begins counting from that value, | |
2462 | only places where the depth in parentheses becomes zero | |
2463 | are candidates for stopping; COUNT such places are counted. | |
2464 | Thus, a positive value for DEPTH means go out levels. | |
2465 | ||
2466 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2467 | ||
2468 | If the beginning or end of (the accessible part of) the buffer is reached | |
2469 | and the depth is wrong, an error is signaled. | |
2470 | If the depth is right but the count is not used up, nil is returned. */) | |
2471 | (from, count, depth) | |
8489eb67 RS |
2472 | Lisp_Object from, count, depth; |
2473 | { | |
b7826503 PJ |
2474 | CHECK_NUMBER (from); |
2475 | CHECK_NUMBER (count); | |
2476 | CHECK_NUMBER (depth); | |
8489eb67 RS |
2477 | |
2478 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
2479 | } | |
2480 | ||
2481 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
fdb82f93 PJ |
2482 | doc: /* Scan from character number FROM by COUNT balanced expressions. |
2483 | If COUNT is negative, scan backwards. | |
2484 | Returns the character number of the position thus found. | |
2485 | ||
2486 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil. | |
2487 | ||
2488 | If the beginning or end of (the accessible part of) the buffer is reached | |
2489 | in the middle of a parenthetical grouping, an error is signaled. | |
2490 | If the beginning or end is reached between groupings | |
2491 | but before count is used up, nil is returned. */) | |
2492 | (from, count) | |
8489eb67 RS |
2493 | Lisp_Object from, count; |
2494 | { | |
b7826503 PJ |
2495 | CHECK_NUMBER (from); |
2496 | CHECK_NUMBER (count); | |
8489eb67 RS |
2497 | |
2498 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
2499 | } | |
2500 | ||
2501 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
fdb82f93 PJ |
2502 | 0, 0, 0, |
2503 | doc: /* Move point backward over any number of chars with prefix syntax. | |
2504 | This includes chars with "quote" or "prefix" syntax (' or p). */) | |
2505 | () | |
8489eb67 RS |
2506 | { |
2507 | int beg = BEGV; | |
6a140a74 RS |
2508 | int opoint = PT; |
2509 | int opoint_byte = PT_BYTE; | |
6ec8bbd2 | 2510 | int pos = PT; |
6a140a74 | 2511 | int pos_byte = PT_BYTE; |
93da5fff | 2512 | int c; |
93da5fff | 2513 | |
7d0393cf | 2514 | if (pos <= beg) |
195d1361 | 2515 | { |
f902a008 RS |
2516 | SET_PT_BOTH (opoint, opoint_byte); |
2517 | ||
2518 | return Qnil; | |
195d1361 | 2519 | } |
8489eb67 | 2520 | |
f902a008 RS |
2521 | SETUP_SYNTAX_TABLE (pos, -1); |
2522 | ||
6a140a74 RS |
2523 | DEC_BOTH (pos, pos_byte); |
2524 | ||
1fd3172d | 2525 | while (!char_quoted (pos, pos_byte) |
195d1361 | 2526 | /* Previous statement updates syntax table. */ |
6a140a74 | 2527 | && ((c = FETCH_CHAR (pos_byte), SYNTAX (c) == Squote) |
93da5fff KH |
2528 | || SYNTAX_PREFIX (c))) |
2529 | { | |
1fd3172d RS |
2530 | opoint = pos; |
2531 | opoint_byte = pos_byte; | |
2532 | ||
2533 | if (pos + 1 > beg) | |
2534 | DEC_BOTH (pos, pos_byte); | |
93da5fff | 2535 | } |
8489eb67 | 2536 | |
6a140a74 | 2537 | SET_PT_BOTH (opoint, opoint_byte); |
8489eb67 RS |
2538 | |
2539 | return Qnil; | |
2540 | } | |
2541 | \f | |
6a140a74 | 2542 | /* Parse forward from FROM / FROM_BYTE to END, |
e5d4f4dc RS |
2543 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
2544 | and return a description of the state of the parse at END. | |
c81a3712 | 2545 | If STOPBEFORE is nonzero, stop at the start of an atom. |
644ea4df RS |
2546 | If COMMENTSTOP is 1, stop at the start of a comment. |
2547 | If COMMENTSTOP is -1, stop at the start or end of a comment, | |
2548 | after the beginning of a string, or after the end of a string. */ | |
8489eb67 | 2549 | |
340f92b5 | 2550 | static void |
6a140a74 | 2551 | scan_sexps_forward (stateptr, from, from_byte, end, targetdepth, |
c81a3712 | 2552 | stopbefore, oldstate, commentstop) |
e5d4f4dc | 2553 | struct lisp_parse_state *stateptr; |
8489eb67 | 2554 | register int from; |
ddc447fc | 2555 | int end, targetdepth, stopbefore, from_byte; |
8489eb67 | 2556 | Lisp_Object oldstate; |
c81a3712 | 2557 | int commentstop; |
8489eb67 RS |
2558 | { |
2559 | struct lisp_parse_state state; | |
2560 | ||
2561 | register enum syntaxcode code; | |
95ff8dfc RS |
2562 | int c1; |
2563 | int comnested; | |
8489eb67 RS |
2564 | struct level { int last, prev; }; |
2565 | struct level levelstart[100]; | |
2566 | register struct level *curlevel = levelstart; | |
2567 | struct level *endlevel = levelstart + 100; | |
8489eb67 RS |
2568 | register int depth; /* Paren depth of current scanning location. |
2569 | level - levelstart equals this except | |
2570 | when the depth becomes negative. */ | |
2571 | int mindepth; /* Lowest DEPTH value seen. */ | |
2572 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
2573 | Lisp_Object tem; | |
93da5fff | 2574 | int prev_from; /* Keep one character before FROM. */ |
6a140a74 | 2575 | int prev_from_byte; |
1fd3172d | 2576 | int prev_from_syntax; |
195d1361 RS |
2577 | int boundary_stop = commentstop == -1; |
2578 | int nofence; | |
95ff8dfc RS |
2579 | int found; |
2580 | int out_bytepos, out_charpos; | |
7c7ca3d2 | 2581 | int temp; |
93da5fff KH |
2582 | |
2583 | prev_from = from; | |
6a140a74 RS |
2584 | prev_from_byte = from_byte; |
2585 | if (from != BEGV) | |
2586 | DEC_BOTH (prev_from, prev_from_byte); | |
93da5fff KH |
2587 | |
2588 | /* Use this macro instead of `from++'. */ | |
6a140a74 RS |
2589 | #define INC_FROM \ |
2590 | do { prev_from = from; \ | |
2591 | prev_from_byte = from_byte; \ | |
1fd3172d RS |
2592 | prev_from_syntax \ |
2593 | = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); \ | |
ef316cf0 | 2594 | INC_BOTH (from, from_byte); \ |
3ceb4629 SM |
2595 | if (from < end) \ |
2596 | UPDATE_SYNTAX_TABLE_FORWARD (from); \ | |
6a140a74 | 2597 | } while (0) |
8489eb67 RS |
2598 | |
2599 | immediate_quit = 1; | |
2600 | QUIT; | |
2601 | ||
265a9e55 | 2602 | if (NILP (oldstate)) |
8489eb67 RS |
2603 | { |
2604 | depth = 0; | |
2605 | state.instring = -1; | |
2606 | state.incomment = 0; | |
195d1361 RS |
2607 | state.comstyle = 0; /* comment style a by default. */ |
2608 | state.comstr_start = -1; /* no comment/string seen. */ | |
8489eb67 RS |
2609 | } |
2610 | else | |
2611 | { | |
2612 | tem = Fcar (oldstate); | |
265a9e55 | 2613 | if (!NILP (tem)) |
8489eb67 RS |
2614 | depth = XINT (tem); |
2615 | else | |
2616 | depth = 0; | |
2617 | ||
2618 | oldstate = Fcdr (oldstate); | |
2619 | oldstate = Fcdr (oldstate); | |
2620 | oldstate = Fcdr (oldstate); | |
2621 | tem = Fcar (oldstate); | |
195d1361 | 2622 | /* Check whether we are inside string_fence-style string: */ |
7d0393cf JB |
2623 | state.instring = (!NILP (tem) |
2624 | ? (INTEGERP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
e76f1c44 | 2625 | : -1); |
8489eb67 RS |
2626 | |
2627 | oldstate = Fcdr (oldstate); | |
2628 | tem = Fcar (oldstate); | |
e76f1c44 GM |
2629 | state.incomment = (!NILP (tem) |
2630 | ? (INTEGERP (tem) ? XINT (tem) : -1) | |
95ff8dfc | 2631 | : 0); |
8489eb67 RS |
2632 | |
2633 | oldstate = Fcdr (oldstate); | |
2634 | tem = Fcar (oldstate); | |
265a9e55 | 2635 | start_quoted = !NILP (tem); |
e5d4f4dc | 2636 | |
95ff8dfc | 2637 | /* if the eighth element of the list is nil, we are in comment |
195d1361 RS |
2638 | style a. If it is non-nil, we are in comment style b */ |
2639 | oldstate = Fcdr (oldstate); | |
e5d4f4dc | 2640 | oldstate = Fcdr (oldstate); |
195d1361 | 2641 | tem = Fcar (oldstate); |
7d0393cf | 2642 | state.comstyle = NILP (tem) ? 0 : (EQ (tem, Qsyntax_table) |
e76f1c44 | 2643 | ? ST_COMMENT_STYLE : 1); |
195d1361 | 2644 | |
e5d4f4dc | 2645 | oldstate = Fcdr (oldstate); |
e5d4f4dc | 2646 | tem = Fcar (oldstate); |
195d1361 | 2647 | state.comstr_start = NILP (tem) ? -1 : XINT (tem) ; |
1a102a58 RS |
2648 | oldstate = Fcdr (oldstate); |
2649 | tem = Fcar (oldstate); | |
2650 | while (!NILP (tem)) /* >= second enclosing sexps. */ | |
2651 | { | |
2652 | /* curlevel++->last ran into compiler bug on Apollo */ | |
2653 | curlevel->last = XINT (Fcar (tem)); | |
2654 | if (++curlevel == endlevel) | |
02010917 | 2655 | curlevel--; /* error ("Nesting too deep for parser"); */ |
1a102a58 RS |
2656 | curlevel->prev = -1; |
2657 | curlevel->last = -1; | |
2658 | tem = Fcdr (tem); | |
2659 | } | |
8489eb67 RS |
2660 | } |
2661 | state.quoted = 0; | |
2662 | mindepth = depth; | |
2663 | ||
2664 | curlevel->prev = -1; | |
2665 | curlevel->last = -1; | |
2666 | ||
326b283b RS |
2667 | SETUP_SYNTAX_TABLE (prev_from, 1); |
2668 | prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); | |
3ceb4629 | 2669 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
326b283b | 2670 | |
195d1361 | 2671 | /* Enter the loop at a place appropriate for initial state. */ |
8489eb67 | 2672 | |
326b283b RS |
2673 | if (state.incomment) |
2674 | goto startincomment; | |
8489eb67 RS |
2675 | if (state.instring >= 0) |
2676 | { | |
195d1361 | 2677 | nofence = state.instring != ST_STRING_STYLE; |
326b283b RS |
2678 | if (start_quoted) |
2679 | goto startquotedinstring; | |
8489eb67 RS |
2680 | goto startinstring; |
2681 | } | |
326b283b RS |
2682 | else if (start_quoted) |
2683 | goto startquoted; | |
1fd3172d | 2684 | |
8489eb67 RS |
2685 | while (from < end) |
2686 | { | |
93da5fff | 2687 | INC_FROM; |
1fd3172d | 2688 | code = prev_from_syntax & 0xff; |
4c920633 | 2689 | |
8f9dc2ed | 2690 | if (code == Scomment) |
95ff8dfc | 2691 | { |
d355bd8a | 2692 | state.comstyle = SYNTAX_FLAGS_COMMENT_STYLE (prev_from_syntax); |
95ff8dfc RS |
2693 | state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ? |
2694 | 1 : -1); | |
2695 | state.comstr_start = prev_from; | |
2696 | } | |
4c920633 | 2697 | else if (code == Scomment_fence) |
e5d4f4dc RS |
2698 | { |
2699 | /* Record the comment style we have entered so that only | |
2700 | the comment-end sequence of the same style actually | |
2701 | terminates the comment section. */ | |
95ff8dfc RS |
2702 | state.comstyle = ST_COMMENT_STYLE; |
2703 | state.incomment = -1; | |
195d1361 | 2704 | state.comstr_start = prev_from; |
e5d4f4dc | 2705 | code = Scomment; |
e5d4f4dc | 2706 | } |
4c920633 | 2707 | else if (from < end) |
1fd3172d | 2708 | if (SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax)) |
95ff8dfc RS |
2709 | if (c1 = FETCH_CHAR (from_byte), |
2710 | SYNTAX_COMSTART_SECOND (c1)) | |
1fd3172d | 2711 | /* Duplicate code to avoid a complex if-expression |
4c920633 RS |
2712 | which causes trouble for the SGI compiler. */ |
2713 | { | |
2714 | /* Record the comment style we have entered so that only | |
2715 | the comment-end sequence of the same style actually | |
2716 | terminates the comment section. */ | |
79bd6490 | 2717 | state.comstyle = SYNTAX_COMMENT_STYLE (c1); |
95ff8dfc RS |
2718 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax); |
2719 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
2720 | state.incomment = comnested ? 1 : -1; | |
4c920633 | 2721 | state.comstr_start = prev_from; |
95ff8dfc | 2722 | INC_FROM; |
4c920633 RS |
2723 | code = Scomment; |
2724 | } | |
e5d4f4dc | 2725 | |
1fd3172d | 2726 | if (SYNTAX_FLAGS_PREFIX (prev_from_syntax)) |
8489eb67 | 2727 | continue; |
0220c518 | 2728 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2729 | { |
2730 | case Sescape: | |
2731 | case Scharquote: | |
2732 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2733 | curlevel->last = prev_from; |
8489eb67 RS |
2734 | startquoted: |
2735 | if (from == end) goto endquoted; | |
93da5fff | 2736 | INC_FROM; |
8489eb67 RS |
2737 | goto symstarted; |
2738 | /* treat following character as a word constituent */ | |
2739 | case Sword: | |
2740 | case Ssymbol: | |
2741 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2742 | curlevel->last = prev_from; |
8489eb67 RS |
2743 | symstarted: |
2744 | while (from < end) | |
2745 | { | |
7c7ca3d2 RS |
2746 | /* Some compilers can't handle this inside the switch. */ |
2747 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2748 | switch (temp) | |
8489eb67 RS |
2749 | { |
2750 | case Scharquote: | |
2751 | case Sescape: | |
93da5fff | 2752 | INC_FROM; |
8489eb67 RS |
2753 | if (from == end) goto endquoted; |
2754 | break; | |
2755 | case Sword: | |
2756 | case Ssymbol: | |
2757 | case Squote: | |
2758 | break; | |
2759 | default: | |
2760 | goto symdone; | |
2761 | } | |
93da5fff | 2762 | INC_FROM; |
8489eb67 RS |
2763 | } |
2764 | symdone: | |
2765 | curlevel->prev = curlevel->last; | |
2766 | break; | |
2767 | ||
240c43e8 | 2768 | case Scomment_fence: /* Can't happen because it's handled above. */ |
8489eb67 | 2769 | case Scomment: |
195d1361 | 2770 | if (commentstop || boundary_stop) goto done; |
d355bd8a SM |
2771 | startincomment: |
2772 | /* The (from == BEGV) test was to enter the loop in the middle so | |
95ff8dfc | 2773 | that we find a 2-char comment ender even if we start in the |
e6365855 | 2774 | middle of it. We don't want to do that if we're just at the |
d355bd8a | 2775 | beginning of the comment (think of (*) ... (*)). */ |
95ff8dfc RS |
2776 | found = forw_comment (from, from_byte, end, |
2777 | state.incomment, state.comstyle, | |
e6365855 SM |
2778 | (from == BEGV || from < state.comstr_start + 3) |
2779 | ? 0 : prev_from_syntax, | |
95ff8dfc RS |
2780 | &out_charpos, &out_bytepos, &state.incomment); |
2781 | from = out_charpos; from_byte = out_bytepos; | |
2782 | /* Beware! prev_from and friends are invalid now. | |
2783 | Luckily, the `done' doesn't use them and the INC_FROM | |
2784 | sets them to a sane value without looking at them. */ | |
2785 | if (!found) goto done; | |
d355bd8a | 2786 | INC_FROM; |
8489eb67 | 2787 | state.incomment = 0; |
e5d4f4dc | 2788 | state.comstyle = 0; /* reset the comment style */ |
195d1361 | 2789 | if (boundary_stop) goto done; |
8489eb67 RS |
2790 | break; |
2791 | ||
2792 | case Sopen: | |
2793 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
2794 | depth++; | |
2795 | /* curlevel++->last ran into compiler bug on Apollo */ | |
93da5fff | 2796 | curlevel->last = prev_from; |
8489eb67 | 2797 | if (++curlevel == endlevel) |
02010917 | 2798 | curlevel--; /* error ("Nesting too deep for parser"); */ |
8489eb67 RS |
2799 | curlevel->prev = -1; |
2800 | curlevel->last = -1; | |
30844415 | 2801 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2802 | break; |
2803 | ||
2804 | case Sclose: | |
2805 | depth--; | |
2806 | if (depth < mindepth) | |
2807 | mindepth = depth; | |
2808 | if (curlevel != levelstart) | |
2809 | curlevel--; | |
2810 | curlevel->prev = curlevel->last; | |
30844415 | 2811 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2812 | break; |
2813 | ||
2814 | case Sstring: | |
195d1361 RS |
2815 | case Sstring_fence: |
2816 | state.comstr_start = from - 1; | |
8489eb67 | 2817 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
93da5fff | 2818 | curlevel->last = prev_from; |
7d0393cf | 2819 | state.instring = (code == Sstring |
6a140a74 | 2820 | ? (FETCH_CHAR (prev_from_byte)) |
195d1361 RS |
2821 | : ST_STRING_STYLE); |
2822 | if (boundary_stop) goto done; | |
8489eb67 | 2823 | startinstring: |
195d1361 | 2824 | { |
644ea4df | 2825 | nofence = state.instring != ST_STRING_STYLE; |
7d0393cf | 2826 | |
644ea4df RS |
2827 | while (1) |
2828 | { | |
2829 | int c; | |
195d1361 | 2830 | |
644ea4df | 2831 | if (from >= end) goto done; |
6a140a74 | 2832 | c = FETCH_CHAR (from_byte); |
7c7ca3d2 RS |
2833 | /* Some compilers can't handle this inside the switch. */ |
2834 | temp = SYNTAX (c); | |
ccf89641 KH |
2835 | |
2836 | /* Check TEMP here so that if the char has | |
2837 | a syntax-table property which says it is NOT | |
2838 | a string character, it does not end the string. */ | |
2839 | if (nofence && c == state.instring && temp == Sstring) | |
2840 | break; | |
2841 | ||
7c7ca3d2 | 2842 | switch (temp) |
644ea4df RS |
2843 | { |
2844 | case Sstring_fence: | |
2845 | if (!nofence) goto string_end; | |
2846 | break; | |
2847 | case Scharquote: | |
2848 | case Sescape: | |
2849 | INC_FROM; | |
2850 | startquotedinstring: | |
2851 | if (from >= end) goto endquoted; | |
195d1361 | 2852 | } |
644ea4df RS |
2853 | INC_FROM; |
2854 | } | |
195d1361 RS |
2855 | } |
2856 | string_end: | |
8489eb67 RS |
2857 | state.instring = -1; |
2858 | curlevel->prev = curlevel->last; | |
93da5fff | 2859 | INC_FROM; |
195d1361 | 2860 | if (boundary_stop) goto done; |
8489eb67 RS |
2861 | break; |
2862 | ||
2863 | case Smath: | |
240c43e8 SM |
2864 | /* FIXME: We should do something with it. */ |
2865 | break; | |
2866 | default: | |
2867 | /* Ignore whitespace, punctuation, quote, endcomment. */ | |
8489eb67 RS |
2868 | break; |
2869 | } | |
2870 | } | |
2871 | goto done; | |
2872 | ||
2873 | stop: /* Here if stopping before start of sexp. */ | |
93da5fff | 2874 | from = prev_from; /* We have just fetched the char that starts it; */ |
8489eb67 RS |
2875 | goto done; /* but return the position before it. */ |
2876 | ||
2877 | endquoted: | |
2878 | state.quoted = 1; | |
2879 | done: | |
2880 | state.depth = depth; | |
2881 | state.mindepth = mindepth; | |
2882 | state.thislevelstart = curlevel->prev; | |
2883 | state.prevlevelstart | |
2884 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
2885 | state.location = from; | |
1a102a58 RS |
2886 | state.levelstarts = Qnil; |
2887 | while (--curlevel >= levelstart) | |
2888 | state.levelstarts = Fcons (make_number (curlevel->last), | |
2889 | state.levelstarts); | |
8489eb67 RS |
2890 | immediate_quit = 0; |
2891 | ||
e5d4f4dc | 2892 | *stateptr = state; |
8489eb67 RS |
2893 | } |
2894 | ||
c81a3712 | 2895 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
fdb82f93 PJ |
2896 | doc: /* Parse Lisp syntax starting at FROM until TO; return status of parse at TO. |
2897 | Parsing stops at TO or when certain criteria are met; | |
2898 | point is set to where parsing stops. | |
2899 | If fifth arg OLDSTATE is omitted or nil, | |
2900 | parsing assumes that FROM is the beginning of a function. | |
2901 | Value is a list of ten elements describing final state of parsing: | |
2902 | 0. depth in parens. | |
2903 | 1. character address of start of innermost containing list; nil if none. | |
2904 | 2. character address of start of last complete sexp terminated. | |
2905 | 3. non-nil if inside a string. | |
2906 | (it is the character that will terminate the string, | |
2907 | or t if the string should be terminated by a generic string delimiter.) | |
7d0393cf | 2908 | 4. nil if outside a comment, t if inside a non-nestable comment, |
fdb82f93 PJ |
2909 | else an integer (the current comment nesting). |
2910 | 5. t if following a quote character. | |
2911 | 6. the minimum paren-depth encountered during this scan. | |
2912 | 7. t if in a comment of style b; symbol `syntax-table' if the comment | |
2913 | should be terminated by a generic comment delimiter. | |
2914 | 8. character address of start of comment or string; nil if not in one. | |
2915 | 9. Intermediate data for continuation of parsing (subject to change). | |
2916 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth | |
2917 | in parentheses becomes equal to TARGETDEPTH. | |
2918 | Fourth arg STOPBEFORE non-nil means stop when come to | |
2919 | any character that starts a sexp. | |
2920 | Fifth arg OLDSTATE is a nine-element list like what this function returns. | |
2921 | It is used to initialize the state of the parse. Elements number 1, 2, 6 | |
2922 | and 8 are ignored; you can leave off element 8 (the last) entirely. | |
2923 | Sixth arg COMMENTSTOP non-nil means stop at the start of a comment. | |
2924 | If it is symbol `syntax-table', stop after the start of a comment or a | |
2925 | string, or after end of a comment or a string. */) | |
2926 | (from, to, targetdepth, stopbefore, oldstate, commentstop) | |
c81a3712 | 2927 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; |
8489eb67 RS |
2928 | { |
2929 | struct lisp_parse_state state; | |
2930 | int target; | |
2931 | ||
265a9e55 | 2932 | if (!NILP (targetdepth)) |
8489eb67 | 2933 | { |
b7826503 | 2934 | CHECK_NUMBER (targetdepth); |
8489eb67 RS |
2935 | target = XINT (targetdepth); |
2936 | } | |
2937 | else | |
2938 | target = -100000; /* We won't reach this depth */ | |
2939 | ||
2940 | validate_region (&from, &to); | |
6a140a74 RS |
2941 | scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)), |
2942 | XINT (to), | |
c81a3712 | 2943 | target, !NILP (stopbefore), oldstate, |
7d0393cf | 2944 | (NILP (commentstop) |
195d1361 | 2945 | ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); |
8489eb67 RS |
2946 | |
2947 | SET_PT (state.location); | |
7d0393cf | 2948 | |
8489eb67 RS |
2949 | return Fcons (make_number (state.depth), |
2950 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
2951 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
7d0393cf JB |
2952 | Fcons (state.instring >= 0 |
2953 | ? (state.instring == ST_STRING_STYLE | |
195d1361 | 2954 | ? Qt : make_number (state.instring)) : Qnil, |
95ff8dfc RS |
2955 | Fcons (state.incomment < 0 ? Qt : |
2956 | (state.incomment == 0 ? Qnil : | |
2957 | make_number (state.incomment)), | |
8489eb67 | 2958 | Fcons (state.quoted ? Qt : Qnil, |
bff37d2a | 2959 | Fcons (make_number (state.mindepth), |
7d0393cf | 2960 | Fcons ((state.comstyle |
bff37d2a RS |
2961 | ? (state.comstyle == ST_COMMENT_STYLE |
2962 | ? Qsyntax_table : Qt) : | |
2963 | Qnil), | |
0beaf54f DL |
2964 | Fcons (((state.incomment |
2965 | || (state.instring >= 0)) | |
bff37d2a RS |
2966 | ? make_number (state.comstr_start) |
2967 | : Qnil), | |
1a102a58 | 2968 | Fcons (state.levelstarts, Qnil)))))))))); |
8489eb67 RS |
2969 | } |
2970 | \f | |
dfcf069d | 2971 | void |
8489eb67 RS |
2972 | init_syntax_once () |
2973 | { | |
78f9a1f7 | 2974 | register int i, c; |
8ea151b2 | 2975 | Lisp_Object temp; |
8489eb67 | 2976 | |
5ebaddf5 RS |
2977 | /* This has to be done here, before we call Fmake_char_table. */ |
2978 | Qsyntax_table = intern ("syntax-table"); | |
2979 | staticpro (&Qsyntax_table); | |
2980 | ||
2981 | /* Intern this now in case it isn't already done. | |
2982 | Setting this variable twice is harmless. | |
2983 | But don't staticpro it here--that is done in alloc.c. */ | |
2984 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
2985 | ||
93da5fff | 2986 | /* Create objects which can be shared among syntax tables. */ |
42ebfa31 | 2987 | Vsyntax_code_object = Fmake_vector (make_number (Smax), Qnil); |
93da5fff KH |
2988 | for (i = 0; i < XVECTOR (Vsyntax_code_object)->size; i++) |
2989 | XVECTOR (Vsyntax_code_object)->contents[i] | |
2990 | = Fcons (make_number (i), Qnil); | |
2991 | ||
5ebaddf5 RS |
2992 | /* Now we are ready to set up this property, so we can |
2993 | create syntax tables. */ | |
2994 | Fput (Qsyntax_table, Qchar_table_extra_slots, make_number (0)); | |
2995 | ||
93da5fff | 2996 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; |
8489eb67 | 2997 | |
5ebaddf5 | 2998 | Vstandard_syntax_table = Fmake_char_table (Qsyntax_table, temp); |
8489eb67 | 2999 | |
93da5fff | 3000 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; |
8489eb67 | 3001 | for (i = 'a'; i <= 'z'; i++) |
8ea151b2 | 3002 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3003 | for (i = 'A'; i <= 'Z'; i++) |
8ea151b2 | 3004 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 3005 | for (i = '0'; i <= '9'; i++) |
8ea151b2 RS |
3006 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
3007 | ||
3008 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '$', temp); | |
3009 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '%', temp); | |
3010 | ||
3011 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '(', | |
3012 | Fcons (make_number (Sopen), make_number (')'))); | |
3013 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ')', | |
3014 | Fcons (make_number (Sclose), make_number ('('))); | |
3015 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '[', | |
3016 | Fcons (make_number (Sopen), make_number (']'))); | |
3017 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ']', | |
3018 | Fcons (make_number (Sclose), make_number ('['))); | |
3019 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '{', | |
3020 | Fcons (make_number (Sopen), make_number ('}'))); | |
3021 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '}', | |
3022 | Fcons (make_number (Sclose), make_number ('{'))); | |
3023 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '"', | |
3024 | Fcons (make_number ((int) Sstring), Qnil)); | |
3025 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\\', | |
3026 | Fcons (make_number ((int) Sescape), Qnil)); | |
3027 | ||
93da5fff | 3028 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Ssymbol]; |
8489eb67 | 3029 | for (i = 0; i < 10; i++) |
78f9a1f7 KH |
3030 | { |
3031 | c = "_-+*/&|<>="[i]; | |
3032 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3033 | } | |
8489eb67 | 3034 | |
93da5fff | 3035 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; |
8489eb67 | 3036 | for (i = 0; i < 12; i++) |
78f9a1f7 KH |
3037 | { |
3038 | c = ".,;:?!#@~^'`"[i]; | |
3039 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
3040 | } | |
bd25db08 KH |
3041 | |
3042 | /* All multibyte characters have syntax `word' by default. */ | |
3043 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; | |
3044 | for (i = CHAR_TABLE_SINGLE_BYTE_SLOTS; i < CHAR_TABLE_ORDINARY_SLOTS; i++) | |
3045 | XCHAR_TABLE (Vstandard_syntax_table)->contents[i] = temp; | |
8489eb67 RS |
3046 | } |
3047 | ||
dfcf069d | 3048 | void |
8489eb67 RS |
3049 | syms_of_syntax () |
3050 | { | |
3051 | Qsyntax_table_p = intern ("syntax-table-p"); | |
3052 | staticpro (&Qsyntax_table_p); | |
3053 | ||
93da5fff KH |
3054 | staticpro (&Vsyntax_code_object); |
3055 | ||
7bf5e9e4 RS |
3056 | Qscan_error = intern ("scan-error"); |
3057 | staticpro (&Qscan_error); | |
3058 | Fput (Qscan_error, Qerror_conditions, | |
f3be100f | 3059 | Fcons (Qscan_error, Fcons (Qerror, Qnil))); |
7bf5e9e4 RS |
3060 | Fput (Qscan_error, Qerror_message, |
3061 | build_string ("Scan error")); | |
3062 | ||
8489eb67 | 3063 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, |
fdb82f93 | 3064 | doc: /* Non-nil means `forward-sexp', etc., should treat comments as whitespace. */); |
8489eb67 | 3065 | |
195d1361 | 3066 | DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties, |
fdb82f93 PJ |
3067 | doc: /* Non-nil means `forward-sexp', etc., obey `syntax-table' property. |
3068 | Otherwise, that text property is simply ignored. | |
3069 | See the info node `(elisp)Syntax Properties' for a description of the | |
3070 | `syntax-table' property. */); | |
195d1361 | 3071 | |
8489eb67 RS |
3072 | words_include_escapes = 0; |
3073 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
fdb82f93 | 3074 | doc: /* Non-nil means `forward-word', etc., should treat escape chars part of words. */); |
8489eb67 | 3075 | |
bd25db08 | 3076 | DEFVAR_BOOL ("multibyte-syntax-as-symbol", &multibyte_syntax_as_symbol, |
fdb82f93 | 3077 | doc: /* Non-nil means `scan-sexps' treats all multibyte characters as symbol. */); |
bd25db08 KH |
3078 | multibyte_syntax_as_symbol = 0; |
3079 | ||
f4ed767f GM |
3080 | DEFVAR_BOOL ("open-paren-in-column-0-is-defun-start", |
3081 | &open_paren_in_column_0_is_defun_start, | |
b222e415 | 3082 | doc: /* *Non-nil means an open paren in column 0 denotes the start of a defun. */); |
f4ed767f GM |
3083 | open_paren_in_column_0_is_defun_start = 1; |
3084 | ||
8489eb67 RS |
3085 | defsubr (&Ssyntax_table_p); |
3086 | defsubr (&Ssyntax_table); | |
3087 | defsubr (&Sstandard_syntax_table); | |
3088 | defsubr (&Scopy_syntax_table); | |
3089 | defsubr (&Sset_syntax_table); | |
3090 | defsubr (&Schar_syntax); | |
beefa22e | 3091 | defsubr (&Smatching_paren); |
c65adb44 | 3092 | defsubr (&Sstring_to_syntax); |
8489eb67 | 3093 | defsubr (&Smodify_syntax_entry); |
62abe9cb | 3094 | defsubr (&Sinternal_describe_syntax_value); |
8489eb67 RS |
3095 | |
3096 | defsubr (&Sforward_word); | |
3097 | ||
195d1361 RS |
3098 | defsubr (&Sskip_chars_forward); |
3099 | defsubr (&Sskip_chars_backward); | |
3100 | defsubr (&Sskip_syntax_forward); | |
3101 | defsubr (&Sskip_syntax_backward); | |
3102 | ||
b3cfe0c8 | 3103 | defsubr (&Sforward_comment); |
8489eb67 RS |
3104 | defsubr (&Sscan_lists); |
3105 | defsubr (&Sscan_sexps); | |
3106 | defsubr (&Sbackward_prefix_chars); | |
3107 | defsubr (&Sparse_partial_sexp); | |
3108 | } |