Commit | Line | Data |
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8489eb67 | 1 | /* GNU Emacs routines to deal with syntax tables; also word and list parsing. |
b8855607 | 2 | Copyright (C) 1985, 87, 93, 94, 95, 97, 1998, 1999 Free Software Foundation, Inc. |
8489eb67 RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a4275ad1 | 8 | the Free Software Foundation; either version 2, or (at your option) |
8489eb67 RS |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
8489eb67 RS |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
8489eb67 RS |
23 | #include <ctype.h> |
24 | #include "lisp.h" | |
25 | #include "commands.h" | |
26 | #include "buffer.h" | |
93da5fff | 27 | #include "charset.h" |
195d1361 RS |
28 | |
29 | /* Make syntax table lookup grant data in gl_state. */ | |
30 | #define SYNTAX_ENTRY_VIA_PROPERTY | |
31 | ||
8489eb67 | 32 | #include "syntax.h" |
195d1361 RS |
33 | #include "intervals.h" |
34 | ||
35 | /* We use these constants in place for comment-style and | |
36 | string-ender-char to distinguish comments/strings started by | |
37 | comment_fence and string_fence codes. */ | |
38 | ||
39 | #define ST_COMMENT_STYLE (256 + 1) | |
40 | #define ST_STRING_STYLE (256 + 2) | |
93da5fff | 41 | #include "category.h" |
8489eb67 | 42 | |
7bf5e9e4 | 43 | Lisp_Object Qsyntax_table_p, Qsyntax_table, Qscan_error; |
8489eb67 RS |
44 | |
45 | int words_include_escapes; | |
195d1361 | 46 | int parse_sexp_lookup_properties; |
8489eb67 | 47 | |
bd25db08 KH |
48 | /* Nonzero means `scan-sexps' treat all multibyte characters as symbol. */ |
49 | int multibyte_syntax_as_symbol; | |
50 | ||
8ea151b2 RS |
51 | /* Used as a temporary in SYNTAX_ENTRY and other macros in syntax.h, |
52 | if not compiled with GCC. No need to mark it, since it is used | |
53 | only very temporarily. */ | |
54 | Lisp_Object syntax_temp; | |
55 | ||
f4ed767f GM |
56 | /* Non-zero means an open parenthesis in column 0 is always considered |
57 | to be the start of a defun. Zero means an open parenthesis in | |
58 | column 0 has no special meaning. */ | |
59 | ||
60 | int open_paren_in_column_0_is_defun_start; | |
61 | ||
e5d4f4dc RS |
62 | /* This is the internal form of the parse state used in parse-partial-sexp. */ |
63 | ||
64 | struct lisp_parse_state | |
65 | { | |
195d1361 RS |
66 | int depth; /* Depth at end of parsing. */ |
67 | int instring; /* -1 if not within string, else desired terminator. */ | |
95ff8dfc | 68 | int incomment; /* -1 if in unnestable comment else comment nesting */ |
195d1361 | 69 | int comstyle; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */ |
e5d4f4dc RS |
70 | int quoted; /* Nonzero if just after an escape char at end of parsing */ |
71 | int thislevelstart; /* Char number of most recent start-of-expression at current level */ | |
72 | int prevlevelstart; /* Char number of start of containing expression */ | |
195d1361 | 73 | int location; /* Char number at which parsing stopped. */ |
e5d4f4dc | 74 | int mindepth; /* Minimum depth seen while scanning. */ |
195d1361 | 75 | int comstr_start; /* Position just after last comment/string starter. */ |
1a102a58 RS |
76 | Lisp_Object levelstarts; /* Char numbers of starts-of-expression |
77 | of levels (starting from outermost). */ | |
e5d4f4dc RS |
78 | }; |
79 | \f | |
37bef230 RS |
80 | /* These variables are a cache for finding the start of a defun. |
81 | find_start_pos is the place for which the defun start was found. | |
82 | find_start_value is the defun start position found for it. | |
6a140a74 | 83 | find_start_value_byte is the corresponding byte position. |
37bef230 RS |
84 | find_start_buffer is the buffer it was found in. |
85 | find_start_begv is the BEGV value when it was found. | |
86 | find_start_modiff is the value of MODIFF when it was found. */ | |
87 | ||
88 | static int find_start_pos; | |
89 | static int find_start_value; | |
6a140a74 | 90 | static int find_start_value_byte; |
37bef230 RS |
91 | static struct buffer *find_start_buffer; |
92 | static int find_start_begv; | |
93 | static int find_start_modiff; | |
6a140a74 RS |
94 | |
95 | ||
96 | static int find_defun_start P_ ((int, int)); | |
95ff8dfc | 97 | static int back_comment P_ ((int, int, int, int, int, int *, int *)); |
6a140a74 RS |
98 | static int char_quoted P_ ((int, int)); |
99 | static Lisp_Object skip_chars P_ ((int, int, Lisp_Object, Lisp_Object)); | |
100 | static Lisp_Object scan_lists P_ ((int, int, int, int)); | |
101 | static void scan_sexps_forward P_ ((struct lisp_parse_state *, | |
102 | int, int, int, int, | |
103 | int, Lisp_Object, int)); | |
195d1361 RS |
104 | \f |
105 | ||
106 | struct gl_state_s gl_state; /* Global state of syntax parser. */ | |
107 | ||
108 | INTERVAL interval_of (); | |
109 | #define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals | |
110 | to scan to property-change. */ | |
111 | ||
6a140a74 RS |
112 | /* Update gl_state to an appropriate interval which contains CHARPOS. The |
113 | sign of COUNT give the relative position of CHARPOS wrt the previously | |
195d1361 | 114 | valid interval. If INIT, only [be]_property fields of gl_state are |
6a140a74 | 115 | valid at start, the rest is filled basing on OBJECT. |
195d1361 | 116 | |
6a140a74 | 117 | `gl_state.*_i' are the intervals, and CHARPOS is further in the search |
195d1361 RS |
118 | direction than the intervals - or in an interval. We update the |
119 | current syntax-table basing on the property of this interval, and | |
6a140a74 | 120 | update the interval to start further than CHARPOS - or be |
195d1361 | 121 | NULL_INTERVAL. We also update lim_property to be the next value of |
6a140a74 | 122 | charpos to call this subroutine again - or be before/after the |
195d1361 RS |
123 | start/end of OBJECT. */ |
124 | ||
125 | void | |
6a140a74 RS |
126 | update_syntax_table (charpos, count, init, object) |
127 | int charpos, count, init; | |
195d1361 RS |
128 | Lisp_Object object; |
129 | { | |
130 | Lisp_Object tmp_table; | |
4ffe723b | 131 | int cnt = 0, invalidate = 1; |
195d1361 RS |
132 | INTERVAL i, oldi; |
133 | ||
134 | if (init) | |
135 | { | |
136 | gl_state.start = gl_state.b_property; | |
137 | gl_state.stop = gl_state.e_property; | |
6a140a74 | 138 | gl_state.forward_i = interval_of (charpos, object); |
195d1361 RS |
139 | i = gl_state.backward_i = gl_state.forward_i; |
140 | gl_state.left_ok = gl_state.right_ok = 1; | |
141 | invalidate = 0; | |
142 | if (NULL_INTERVAL_P (i)) | |
143 | return; | |
f902a008 | 144 | /* interval_of updates only ->position of the return value, so |
d80f4cc7 RS |
145 | update the parents manually to speed up update_interval. */ |
146 | while (!NULL_PARENT (i)) | |
147 | { | |
148 | if (AM_RIGHT_CHILD (i)) | |
439d5cb4 | 149 | INTERVAL_PARENT (i)->position = i->position |
d80f4cc7 | 150 | - LEFT_TOTAL_LENGTH (i) + TOTAL_LENGTH (i) /* right end */ |
439d5cb4 KR |
151 | - TOTAL_LENGTH (INTERVAL_PARENT (i)) |
152 | + LEFT_TOTAL_LENGTH (INTERVAL_PARENT (i)); | |
d80f4cc7 | 153 | else |
439d5cb4 | 154 | INTERVAL_PARENT (i)->position = i->position - LEFT_TOTAL_LENGTH (i) |
d80f4cc7 | 155 | + TOTAL_LENGTH (i); |
439d5cb4 | 156 | i = INTERVAL_PARENT (i); |
d80f4cc7 RS |
157 | } |
158 | i = gl_state.forward_i; | |
ee0cdb48 KH |
159 | gl_state.b_property = i->position - 1 - gl_state.offset; |
160 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; | |
195d1361 RS |
161 | goto update; |
162 | } | |
163 | oldi = i = count > 0 ? gl_state.forward_i : gl_state.backward_i; | |
164 | ||
6a140a74 RS |
165 | /* We are guarantied to be called with CHARPOS either in i, |
166 | or further off. */ | |
195d1361 RS |
167 | if (NULL_INTERVAL_P (i)) |
168 | error ("Error in syntax_table logic for to-the-end intervals"); | |
6a140a74 | 169 | else if (charpos < i->position) /* Move left. */ |
195d1361 RS |
170 | { |
171 | if (count > 0) | |
f902a008 | 172 | error ("Error in syntax_table logic for intervals <-"); |
195d1361 | 173 | /* Update the interval. */ |
6a140a74 | 174 | i = update_interval (i, charpos); |
195d1361 RS |
175 | if (oldi->position != INTERVAL_LAST_POS (i)) |
176 | { | |
177 | invalidate = 0; | |
178 | gl_state.right_ok = 1; /* Invalidate the other end. */ | |
179 | gl_state.forward_i = i; | |
ee0cdb48 | 180 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
181 | } |
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); |
195d1361 RS |
189 | if (i->position != INTERVAL_LAST_POS (oldi)) |
190 | { | |
191 | invalidate = 0; | |
192 | gl_state.left_ok = 1; /* Invalidate the other end. */ | |
193 | gl_state.backward_i = i; | |
ee0cdb48 | 194 | gl_state.b_property = i->position - 1 - gl_state.offset; |
195d1361 RS |
195 | } |
196 | } | |
197 | else if (count > 0 ? gl_state.right_ok : gl_state.left_ok) | |
198 | { | |
199 | /* We do not need to recalculate tmp_table. */ | |
200 | tmp_table = gl_state.old_prop; | |
201 | } | |
202 | ||
203 | update: | |
204 | tmp_table = textget (i->plist, Qsyntax_table); | |
205 | ||
206 | if (invalidate) | |
207 | invalidate = !EQ (tmp_table, gl_state.old_prop); /* Need to invalidate? */ | |
208 | ||
209 | if (invalidate) /* Did not get to adjacent interval. */ | |
210 | { /* with the same table => */ | |
211 | /* invalidate the old range. */ | |
212 | if (count > 0) | |
213 | { | |
214 | gl_state.backward_i = i; | |
215 | gl_state.left_ok = 1; /* Invalidate the other end. */ | |
ee0cdb48 | 216 | gl_state.b_property = i->position - 1 - gl_state.offset; |
195d1361 RS |
217 | } |
218 | else | |
219 | { | |
220 | gl_state.forward_i = i; | |
221 | gl_state.right_ok = 1; /* Invalidate the other end. */ | |
ee0cdb48 | 222 | gl_state.e_property = INTERVAL_LAST_POS (i) - gl_state.offset; |
195d1361 RS |
223 | } |
224 | } | |
37bef230 | 225 | |
195d1361 RS |
226 | gl_state.current_syntax_table = tmp_table; |
227 | gl_state.old_prop = tmp_table; | |
2e34157c | 228 | if (EQ (Fsyntax_table_p (tmp_table), Qt)) |
195d1361 RS |
229 | { |
230 | gl_state.use_global = 0; | |
231 | } | |
232 | else if (CONSP (tmp_table)) | |
233 | { | |
234 | gl_state.use_global = 1; | |
235 | gl_state.global_code = tmp_table; | |
236 | } | |
237 | else | |
238 | { | |
239 | gl_state.use_global = 0; | |
240 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
241 | } | |
242 | ||
243 | while (!NULL_INTERVAL_P (i)) | |
244 | { | |
245 | if (cnt && !EQ (tmp_table, textget (i->plist, Qsyntax_table))) | |
246 | { | |
247 | if (count > 0) | |
248 | gl_state.right_ok = 0; | |
249 | else | |
250 | gl_state.left_ok = 0; | |
251 | break; | |
252 | } | |
253 | else if (cnt == INTERVALS_AT_ONCE) | |
254 | { | |
255 | if (count > 0) | |
256 | gl_state.right_ok = 1; | |
257 | else | |
258 | gl_state.left_ok = 1; | |
259 | break; | |
260 | } | |
261 | cnt++; | |
262 | i = count > 0 ? next_interval (i) : previous_interval (i); | |
263 | } | |
264 | if (NULL_INTERVAL_P (i)) | |
265 | { /* This property goes to the end. */ | |
266 | if (count > 0) | |
267 | gl_state.e_property = gl_state.stop; | |
268 | else | |
269 | gl_state.b_property = gl_state.start; | |
270 | } | |
271 | else | |
272 | { | |
273 | if (count > 0) | |
274 | { | |
ee0cdb48 | 275 | gl_state.e_property = i->position - gl_state.offset; |
195d1361 RS |
276 | gl_state.forward_i = i; |
277 | } | |
278 | else | |
279 | { | |
ee0cdb48 | 280 | gl_state.b_property = i->position + LENGTH (i) - 1 - gl_state.offset; |
195d1361 RS |
281 | gl_state.backward_i = i; |
282 | } | |
283 | } | |
284 | } | |
285 | \f | |
6a140a74 RS |
286 | /* Returns TRUE if char at CHARPOS is quoted. |
287 | Global syntax-table data should be set up already to be good at CHARPOS | |
288 | or after. On return global syntax data is good for lookup at CHARPOS. */ | |
195d1361 RS |
289 | |
290 | static int | |
6a140a74 RS |
291 | char_quoted (charpos, bytepos) |
292 | register int charpos, bytepos; | |
195d1361 RS |
293 | { |
294 | register enum syntaxcode code; | |
295 | register int beg = BEGV; | |
296 | register int quoted = 0; | |
6a140a74 RS |
297 | int orig = charpos; |
298 | ||
299 | DEC_BOTH (charpos, bytepos); | |
195d1361 | 300 | |
6a140a74 | 301 | while (bytepos >= beg) |
195d1361 | 302 | { |
6a140a74 RS |
303 | UPDATE_SYNTAX_TABLE_BACKWARD (charpos); |
304 | code = SYNTAX (FETCH_CHAR (bytepos)); | |
305 | if (! (code == Scharquote || code == Sescape)) | |
306 | break; | |
307 | ||
308 | DEC_BOTH (charpos, bytepos); | |
309 | quoted = !quoted; | |
195d1361 | 310 | } |
6a140a74 RS |
311 | |
312 | UPDATE_SYNTAX_TABLE (orig); | |
195d1361 RS |
313 | return quoted; |
314 | } | |
6a140a74 RS |
315 | |
316 | /* Return the bytepos one character after BYTEPOS. | |
317 | We assume that BYTEPOS is not at the end of the buffer. */ | |
318 | ||
319 | INLINE int | |
320 | inc_bytepos (bytepos) | |
321 | int bytepos; | |
322 | { | |
ef316cf0 RS |
323 | if (NILP (current_buffer->enable_multibyte_characters)) |
324 | return bytepos + 1; | |
325 | ||
6a140a74 RS |
326 | INC_POS (bytepos); |
327 | return bytepos; | |
328 | } | |
329 | ||
330 | /* Return the bytepos one character before BYTEPOS. | |
331 | We assume that BYTEPOS is not at the start of the buffer. */ | |
332 | ||
333 | INLINE int | |
334 | dec_bytepos (bytepos) | |
335 | int bytepos; | |
336 | { | |
ef316cf0 RS |
337 | if (NILP (current_buffer->enable_multibyte_characters)) |
338 | return bytepos - 1; | |
339 | ||
6a140a74 RS |
340 | DEC_POS (bytepos); |
341 | return bytepos; | |
342 | } | |
195d1361 | 343 | \f |
37bef230 RS |
344 | /* Find a defun-start that is the last one before POS (or nearly the last). |
345 | We record what we find, so that another call in the same area | |
195d1361 RS |
346 | can return the same value right away. |
347 | ||
348 | There is no promise at which position the global syntax data is | |
349 | valid on return from the subroutine, so the caller should explicitly | |
350 | update the global data. */ | |
37bef230 RS |
351 | |
352 | static int | |
6a140a74 RS |
353 | find_defun_start (pos, pos_byte) |
354 | int pos, pos_byte; | |
37bef230 | 355 | { |
6a140a74 | 356 | int opoint = PT, opoint_byte = PT_BYTE; |
37bef230 RS |
357 | |
358 | /* Use previous finding, if it's valid and applies to this inquiry. */ | |
359 | if (current_buffer == find_start_buffer | |
360 | /* Reuse the defun-start even if POS is a little farther on. | |
361 | POS might be in the next defun, but that's ok. | |
362 | Our value may not be the best possible, but will still be usable. */ | |
363 | && pos <= find_start_pos + 1000 | |
364 | && pos >= find_start_value | |
365 | && BEGV == find_start_begv | |
366 | && MODIFF == find_start_modiff) | |
367 | return find_start_value; | |
368 | ||
369 | /* Back up to start of line. */ | |
6a140a74 | 370 | scan_newline (pos, pos_byte, BEGV, BEGV_BYTE, -1, 1); |
37bef230 | 371 | |
195d1361 RS |
372 | /* We optimize syntax-table lookup for rare updates. Thus we accept |
373 | only those `^\s(' which are good in global _and_ text-property | |
374 | syntax-tables. */ | |
375 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
376 | gl_state.use_global = 0; | |
4467eb94 | 377 | if (open_paren_in_column_0_is_defun_start) |
37bef230 | 378 | { |
4467eb94 | 379 | while (PT > BEGV) |
195d1361 | 380 | { |
4467eb94 GM |
381 | /* Open-paren at start of line means we may have found our |
382 | defun-start. */ | |
383 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) | |
384 | { | |
385 | SETUP_SYNTAX_TABLE (PT + 1, -1); /* Try again... */ | |
386 | if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen) | |
387 | break; | |
388 | /* Now fallback to the default value. */ | |
389 | gl_state.current_syntax_table = current_buffer->syntax_table; | |
390 | gl_state.use_global = 0; | |
391 | } | |
392 | /* Move to beg of previous line. */ | |
393 | scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1); | |
195d1361 | 394 | } |
37bef230 RS |
395 | } |
396 | ||
397 | /* Record what we found, for the next try. */ | |
6a140a74 RS |
398 | find_start_value = PT; |
399 | find_start_value_byte = PT_BYTE; | |
37bef230 RS |
400 | find_start_buffer = current_buffer; |
401 | find_start_modiff = MODIFF; | |
402 | find_start_begv = BEGV; | |
403 | find_start_pos = pos; | |
404 | ||
6a140a74 RS |
405 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
406 | ||
37bef230 RS |
407 | return find_start_value; |
408 | } | |
409 | \f | |
f902a008 RS |
410 | /* Return the SYNTAX_COMEND_FIRST of the character before POS, POS_BYTE. */ |
411 | ||
412 | static int | |
413 | prev_char_comend_first (pos, pos_byte) | |
414 | int pos, pos_byte; | |
415 | { | |
416 | int c, val; | |
417 | ||
418 | DEC_BOTH (pos, pos_byte); | |
419 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
420 | c = FETCH_CHAR (pos_byte); | |
421 | val = SYNTAX_COMEND_FIRST (c); | |
422 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
423 | return val; | |
424 | } | |
425 | ||
426 | /* Return the SYNTAX_COMSTART_FIRST of the character before POS, POS_BYTE. */ | |
427 | ||
428 | static int | |
429 | prev_char_comstart_first (pos, pos_byte) | |
430 | int pos, pos_byte; | |
431 | { | |
432 | int c, val; | |
433 | ||
434 | DEC_BOTH (pos, pos_byte); | |
435 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); | |
436 | c = FETCH_CHAR (pos_byte); | |
437 | val = SYNTAX_COMSTART_FIRST (c); | |
438 | UPDATE_SYNTAX_TABLE_FORWARD (pos + 1); | |
439 | return val; | |
440 | } | |
441 | ||
6a140a74 RS |
442 | /* Checks whether charpos FROM is at the end of a comment. |
443 | FROM_BYTE is the bytepos corresponding to FROM. | |
444 | Do not move back before STOP. | |
445 | ||
446 | Return a positive value if we find a comment ending at FROM/FROM_BYTE; | |
447 | return -1 otherwise. | |
448 | ||
449 | If successful, store the charpos of the comment's beginning | |
450 | into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR. | |
527a32d9 KH |
451 | |
452 | Global syntax data remains valid for backward search starting at | |
453 | the returned value (or at FROM, if the search was not successful). */ | |
195d1361 RS |
454 | |
455 | static int | |
95ff8dfc | 456 | back_comment (from, from_byte, stop, comnested, comstyle, charpos_ptr, bytepos_ptr) |
6a140a74 | 457 | int from, from_byte, stop; |
95ff8dfc | 458 | int comnested, comstyle; |
6a140a74 | 459 | int *charpos_ptr, *bytepos_ptr; |
195d1361 RS |
460 | { |
461 | /* Look back, counting the parity of string-quotes, | |
462 | and recording the comment-starters seen. | |
463 | When we reach a safe place, assume that's not in a string; | |
464 | then step the main scan to the earliest comment-starter seen | |
465 | an even number of string quotes away from the safe place. | |
466 | ||
467 | OFROM[I] is position of the earliest comment-starter seen | |
468 | which is I+2X quotes from the comment-end. | |
469 | PARITY is current parity of quotes from the comment end. */ | |
3ee5041c | 470 | int string_style = -1; /* Presumed outside of any string. */ |
195d1361 | 471 | int string_lossage = 0; |
f7c436c1 SM |
472 | /* Not a real lossage: indicates that we have passed a matching comment |
473 | starter plus an non-matching comment-ender, meaning that any matching | |
474 | comment-starter we might see later could be a false positive (hidden | |
475 | inside another comment). | |
476 | Test case: { a (* b } c (* d *) */ | |
477 | int comment_lossage = 0; | |
195d1361 | 478 | int comment_end = from; |
6a140a74 | 479 | int comment_end_byte = from_byte; |
195d1361 | 480 | int comstart_pos = 0; |
6a140a74 | 481 | int comstart_byte; |
195d1361 | 482 | int scanstart = from - 1; |
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; |
195d1361 RS |
490 | |
491 | /* At beginning of range to scan, we're outside of strings; | |
492 | that determines quote parity to the comment-end. */ | |
493 | while (from != stop) | |
494 | { | |
4ffe723b | 495 | int temp_byte; |
6a140a74 | 496 | |
195d1361 | 497 | /* Move back and examine a character. */ |
6a140a74 | 498 | DEC_BOTH (from, from_byte); |
195d1361 RS |
499 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
500 | ||
6a140a74 | 501 | c = FETCH_CHAR (from_byte); |
195d1361 RS |
502 | code = SYNTAX (c); |
503 | ||
527a32d9 | 504 | /* If this char is the second of a 2-char comment end sequence, |
195d1361 RS |
505 | back up and give the pair the appropriate syntax. */ |
506 | if (from > stop && SYNTAX_COMEND_SECOND (c) | |
f902a008 | 507 | && prev_char_comend_first (from, from_byte)) |
195d1361 RS |
508 | { |
509 | code = Sendcomment; | |
6a140a74 | 510 | DEC_BOTH (from, from_byte); |
195d1361 | 511 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 512 | c = FETCH_CHAR (from_byte); |
195d1361 RS |
513 | } |
514 | ||
515 | /* If this char starts a 2-char comment start sequence, | |
516 | treat it like a 1-char comment starter. */ | |
f902a008 RS |
517 | if (from < scanstart && SYNTAX_COMSTART_FIRST (c)) |
518 | { | |
519 | temp_byte = inc_bytepos (from_byte); | |
520 | UPDATE_SYNTAX_TABLE_FORWARD (from + 1); | |
521 | if (SYNTAX_COMSTART_SECOND (FETCH_CHAR (temp_byte)) | |
522 | && comstyle == SYNTAX_COMMENT_STYLE (FETCH_CHAR (temp_byte))) | |
523 | code = Scomment; | |
524 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
525 | } | |
1aa963c8 SM |
526 | else if (code == Scomment && comstyle != SYNTAX_COMMENT_STYLE (c)) |
527 | /* Ignore comment starters of a different style. */ | |
528 | continue; | |
195d1361 | 529 | |
9828a477 KH |
530 | /* Ignore escaped characters, except comment-enders. */ |
531 | if (code != Sendcomment && char_quoted (from, from_byte)) | |
195d1361 RS |
532 | continue; |
533 | ||
3ee5041c | 534 | switch (code) |
195d1361 | 535 | { |
3ee5041c SM |
536 | case Sstring_fence: |
537 | case Scomment_fence: | |
538 | c = (code == Sstring_fence ? ST_STRING_STYLE : ST_COMMENT_STYLE); | |
539 | case Sstring: | |
540 | /* Track parity of quotes. */ | |
541 | if (string_style == -1) | |
542 | /* Entering a string. */ | |
543 | string_style = c; | |
544 | else if (string_style == c) | |
545 | /* Leaving the string. */ | |
546 | string_style = -1; | |
547 | else | |
548 | /* If we have two kinds of string delimiters. | |
549 | There's no way to grok this scanning backwards. */ | |
195d1361 | 550 | string_lossage = 1; |
3ee5041c SM |
551 | break; |
552 | ||
553 | case Scomment: | |
554 | /* We've already checked that it is the relevant comstyle. */ | |
f7c436c1 | 555 | if (string_style != -1 || comment_lossage || string_lossage) |
3ee5041c SM |
556 | /* There are odd string quotes involved, so let's be careful. |
557 | Test case in Pascal: " { " a { " } */ | |
558 | goto lossage; | |
559 | ||
f7c436c1 SM |
560 | if (!comnested) |
561 | { | |
562 | /* Record best comment-starter so far. */ | |
563 | comstart_pos = from; | |
564 | comstart_byte = from_byte; | |
565 | } | |
566 | else if (--nesting <= 0) | |
95ff8dfc RS |
567 | /* nested comments have to be balanced, so we don't need to |
568 | keep looking for earlier ones. We use here the same (slightly | |
569 | incorrect) reasoning as below: since it is followed by uniform | |
570 | paired string quotes, this comment-start has to be outside of | |
571 | strings, else the comment-end itself would be inside a string. */ | |
572 | goto done; | |
3ee5041c SM |
573 | break; |
574 | ||
02010917 SM |
575 | case Sendcomment: |
576 | if (SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte)) == comstyle) | |
577 | /* This is the same style of comment ender as ours. */ | |
578 | { | |
579 | if (comnested) | |
580 | nesting++; | |
581 | else | |
582 | /* Anything before that can't count because it would match | |
583 | this comment-ender rather than ours. */ | |
584 | from = stop; /* Break out of the loop. */ | |
585 | } | |
f7c436c1 SM |
586 | else if (comstart_pos != 0 || c != '\n') |
587 | /* We're mixing comment styles here, so we'd better be careful. | |
588 | The (comstart_pos != 0 || c != '\n') check is not quite correct | |
589 | (we should just always set comment_lossage), but removing it | |
590 | would imply that any multiline comment in C would go through | |
591 | lossage, which seems overkill. | |
592 | The failure should only happen in the rare cases such as | |
593 | { (* } *) */ | |
594 | comment_lossage = 1; | |
02010917 | 595 | break; |
195d1361 | 596 | |
02010917 SM |
597 | case Sopen: |
598 | /* Assume a defun-start point is outside of strings. */ | |
599 | if (open_paren_in_column_0_is_defun_start | |
600 | && (from == stop | |
601 | || (temp_byte = dec_bytepos (from_byte), | |
602 | FETCH_CHAR (temp_byte) == '\n'))) | |
603 | { | |
604 | defun_start = from; | |
605 | defun_start_byte = from_byte; | |
606 | from = stop; /* Break out of the loop. */ | |
607 | } | |
eb35b628 | 608 | break; |
02010917 SM |
609 | |
610 | default: | |
f7c436c1 | 611 | break; |
eb35b628 | 612 | } |
195d1361 RS |
613 | } |
614 | ||
615 | if (comstart_pos == 0) | |
616 | { | |
617 | from = comment_end; | |
6a140a74 | 618 | from_byte = comment_end_byte; |
195d1361 RS |
619 | UPDATE_SYNTAX_TABLE_FORWARD (comment_end - 1); |
620 | } | |
f7c436c1 SM |
621 | /* If comstart_pos is set and we get here (ie. didn't jump to `lossage' |
622 | or `done'), then we've found the beginning of the non-nested comment. */ | |
623 | else if (1) /* !comnested */ | |
195d1361 RS |
624 | { |
625 | from = comstart_pos; | |
6a140a74 | 626 | from_byte = comstart_byte; |
195d1361 RS |
627 | /* Globals are correct now. */ |
628 | } | |
629 | else | |
630 | { | |
3ee5041c SM |
631 | struct lisp_parse_state state; |
632 | lossage: | |
195d1361 RS |
633 | /* We had two kinds of string delimiters mixed up |
634 | together. Decode this going forwards. | |
02010917 | 635 | Scan fwd from a known safe place (beginning-of-defun) |
195d1361 RS |
636 | to the one in question; this records where we |
637 | last passed a comment starter. */ | |
eb35b628 RS |
638 | /* If we did not already find the defun start, find it now. */ |
639 | if (defun_start == 0) | |
640 | { | |
641 | defun_start = find_defun_start (comment_end, comment_end_byte); | |
642 | defun_start_byte = find_start_value_byte; | |
643 | } | |
02010917 | 644 | do |
195d1361 | 645 | { |
02010917 SM |
646 | scan_sexps_forward (&state, |
647 | defun_start, defun_start_byte, | |
648 | comment_end, -10000, 0, Qnil, 0); | |
649 | defun_start = comment_end; | |
650 | if (state.incomment == (comnested ? 1 : -1) | |
651 | && state.comstyle == comstyle) | |
652 | from = state.comstr_start; | |
653 | else | |
654 | { | |
655 | from = comment_end; | |
656 | if (state.incomment) | |
657 | /* If comment_end is inside some other comment, maybe ours | |
658 | is nested, so we need to try again from within the | |
659 | surrounding comment. Example: { a (* " *) */ | |
660 | { | |
661 | /* FIXME: We should advance by one or two chars. */ | |
662 | defun_start = state.comstr_start + 2; | |
663 | defun_start_byte = CHAR_TO_BYTE (defun_start); | |
664 | } | |
665 | } | |
666 | } while (defun_start < comment_end); | |
667 | ||
6a140a74 | 668 | from_byte = CHAR_TO_BYTE (from); |
195d1361 RS |
669 | UPDATE_SYNTAX_TABLE_FORWARD (from - 1); |
670 | } | |
671 | ||
95ff8dfc | 672 | done: |
6a140a74 RS |
673 | *charpos_ptr = from; |
674 | *bytepos_ptr = from_byte; | |
675 | ||
1aa963c8 | 676 | return (from == comment_end) ? -1 : from; |
195d1361 RS |
677 | } |
678 | \f | |
8489eb67 | 679 | DEFUN ("syntax-table-p", Fsyntax_table_p, Ssyntax_table_p, 1, 1, 0, |
2203e1e8 | 680 | "Return t if OBJECT is a syntax table.\n\ |
8ea151b2 | 681 | Currently, any char-table counts as a syntax table.") |
2203e1e8 EN |
682 | (object) |
683 | Lisp_Object object; | |
8489eb67 | 684 | { |
2203e1e8 | 685 | if (CHAR_TABLE_P (object) |
e704cb4b | 686 | && EQ (XCHAR_TABLE (object)->purpose, Qsyntax_table)) |
8489eb67 RS |
687 | return Qt; |
688 | return Qnil; | |
689 | } | |
690 | ||
8ea151b2 | 691 | static void |
8489eb67 RS |
692 | check_syntax_table (obj) |
693 | Lisp_Object obj; | |
694 | { | |
d1be9f0f | 695 | if (!(CHAR_TABLE_P (obj) |
e704cb4b | 696 | && EQ (XCHAR_TABLE (obj)->purpose, Qsyntax_table))) |
d1be9f0f | 697 | wrong_type_argument (Qsyntax_table_p, obj); |
8489eb67 RS |
698 | } |
699 | ||
8489eb67 RS |
700 | DEFUN ("syntax-table", Fsyntax_table, Ssyntax_table, 0, 0, 0, |
701 | "Return the current syntax table.\n\ | |
702 | This is the one specified by the current buffer.") | |
703 | () | |
704 | { | |
705 | return current_buffer->syntax_table; | |
706 | } | |
707 | ||
708 | DEFUN ("standard-syntax-table", Fstandard_syntax_table, | |
709 | Sstandard_syntax_table, 0, 0, 0, | |
710 | "Return the standard syntax table.\n\ | |
711 | This is the one used for new buffers.") | |
712 | () | |
713 | { | |
714 | return Vstandard_syntax_table; | |
715 | } | |
716 | ||
717 | DEFUN ("copy-syntax-table", Fcopy_syntax_table, Scopy_syntax_table, 0, 1, 0, | |
718 | "Construct a new syntax table and return it.\n\ | |
719 | It is a copy of the TABLE, which defaults to the standard syntax table.") | |
720 | (table) | |
721 | Lisp_Object table; | |
722 | { | |
8ea151b2 RS |
723 | Lisp_Object copy; |
724 | ||
265a9e55 | 725 | if (!NILP (table)) |
8ea151b2 RS |
726 | check_syntax_table (table); |
727 | else | |
728 | table = Vstandard_syntax_table; | |
729 | ||
730 | copy = Fcopy_sequence (table); | |
0f867324 RS |
731 | |
732 | /* Only the standard syntax table should have a default element. | |
733 | Other syntax tables should inherit from parents instead. */ | |
734 | XCHAR_TABLE (copy)->defalt = Qnil; | |
735 | ||
736 | /* Copied syntax tables should all have parents. | |
737 | If we copied one with no parent, such as the standard syntax table, | |
738 | use the standard syntax table as the copy's parent. */ | |
739 | if (NILP (XCHAR_TABLE (copy)->parent)) | |
740 | Fset_char_table_parent (copy, Vstandard_syntax_table); | |
8ea151b2 | 741 | return copy; |
8489eb67 RS |
742 | } |
743 | ||
744 | DEFUN ("set-syntax-table", Fset_syntax_table, Sset_syntax_table, 1, 1, 0, | |
745 | "Select a new syntax table for the current buffer.\n\ | |
746 | One argument, a syntax table.") | |
747 | (table) | |
748 | Lisp_Object table; | |
749 | { | |
4e4dfa78 | 750 | int idx; |
8ea151b2 | 751 | check_syntax_table (table); |
8489eb67 RS |
752 | current_buffer->syntax_table = table; |
753 | /* Indicate that this buffer now has a specified syntax table. */ | |
f6cd0527 GM |
754 | idx = PER_BUFFER_VAR_IDX (syntax_table); |
755 | SET_PER_BUFFER_VALUE_P (current_buffer, idx, 1); | |
8489eb67 RS |
756 | return table; |
757 | } | |
758 | \f | |
759 | /* Convert a letter which signifies a syntax code | |
760 | into the code it signifies. | |
195d1361 | 761 | This is used by modify-syntax-entry, and other things. */ |
8489eb67 RS |
762 | |
763 | unsigned char syntax_spec_code[0400] = | |
764 | { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
765 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
766 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
767 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
195d1361 | 768 | (char) Swhitespace, (char) Scomment_fence, (char) Sstring, 0377, |
8489eb67 RS |
769 | (char) Smath, 0377, 0377, (char) Squote, |
770 | (char) Sopen, (char) Sclose, 0377, 0377, | |
771 | 0377, (char) Swhitespace, (char) Spunct, (char) Scharquote, | |
772 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
773 | 0377, 0377, 0377, 0377, | |
774 | (char) Scomment, 0377, (char) Sendcomment, 0377, | |
6cb71bf6 | 775 | (char) Sinherit, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */ |
8489eb67 RS |
776 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, |
777 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
778 | 0377, 0377, 0377, 0377, (char) Sescape, 0377, 0377, (char) Ssymbol, | |
779 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */ | |
780 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, | |
781 | 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword, | |
195d1361 | 782 | 0377, 0377, 0377, 0377, (char) Sstring_fence, 0377, 0377, 0377 |
8489eb67 RS |
783 | }; |
784 | ||
195d1361 | 785 | /* Indexed by syntax code, give the letter that describes it. */ |
8489eb67 | 786 | |
195d1361 | 787 | char syntax_code_spec[16] = |
8489eb67 | 788 | { |
195d1361 RS |
789 | ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@', |
790 | '!', '|' | |
8489eb67 | 791 | }; |
93da5fff KH |
792 | |
793 | /* Indexed by syntax code, give the object (cons of syntax code and | |
794 | nil) to be stored in syntax table. Since these objects can be | |
795 | shared among syntax tables, we generate them in advance. By | |
796 | sharing objects, the function `describe-syntax' can give a more | |
797 | compact listing. */ | |
798 | static Lisp_Object Vsyntax_code_object; | |
799 | ||
8489eb67 | 800 | \f |
8ea151b2 RS |
801 | /* Look up the value for CHARACTER in syntax table TABLE's parent |
802 | and its parents. SYNTAX_ENTRY calls this, when TABLE itself has nil | |
803 | for CHARACTER. It's actually used only when not compiled with GCC. */ | |
804 | ||
805 | Lisp_Object | |
806 | syntax_parent_lookup (table, character) | |
807 | Lisp_Object table; | |
808 | int character; | |
809 | { | |
810 | Lisp_Object value; | |
811 | ||
812 | while (1) | |
813 | { | |
814 | table = XCHAR_TABLE (table)->parent; | |
815 | if (NILP (table)) | |
816 | return Qnil; | |
817 | ||
818 | value = XCHAR_TABLE (table)->contents[character]; | |
819 | if (!NILP (value)) | |
820 | return value; | |
821 | } | |
822 | } | |
823 | ||
8489eb67 | 824 | DEFUN ("char-syntax", Fchar_syntax, Schar_syntax, 1, 1, 0, |
2203e1e8 EN |
825 | "Return the syntax code of CHARACTER, described by a character.\n\ |
826 | For example, if CHARACTER is a word constituent,\n\ | |
827 | the character `w' is returned.\n\ | |
8489eb67 RS |
828 | The characters that correspond to various syntax codes\n\ |
829 | are listed in the documentation of `modify-syntax-entry'.") | |
2203e1e8 EN |
830 | (character) |
831 | Lisp_Object character; | |
8489eb67 | 832 | { |
8ea151b2 | 833 | int char_int; |
195d1361 RS |
834 | gl_state.current_syntax_table = current_buffer->syntax_table; |
835 | ||
836 | gl_state.use_global = 0; | |
2203e1e8 EN |
837 | CHECK_NUMBER (character, 0); |
838 | char_int = XINT (character); | |
8ea151b2 | 839 | return make_number (syntax_code_spec[(int) SYNTAX (char_int)]); |
beefa22e RS |
840 | } |
841 | ||
842 | DEFUN ("matching-paren", Fmatching_paren, Smatching_paren, 1, 1, 0, | |
2203e1e8 EN |
843 | "Return the matching parenthesis of CHARACTER, or nil if none.") |
844 | (character) | |
845 | Lisp_Object character; | |
beefa22e | 846 | { |
8ea151b2 | 847 | int char_int, code; |
195d1361 RS |
848 | gl_state.current_syntax_table = current_buffer->syntax_table; |
849 | gl_state.use_global = 0; | |
2203e1e8 EN |
850 | CHECK_NUMBER (character, 0); |
851 | char_int = XINT (character); | |
8ea151b2 | 852 | code = SYNTAX (char_int); |
a8bd7cd8 | 853 | if (code == Sopen || code == Sclose) |
2e34157c | 854 | return SYNTAX_MATCH (char_int); |
beefa22e | 855 | return Qnil; |
8489eb67 RS |
856 | } |
857 | ||
858 | /* This comment supplies the doc string for modify-syntax-entry, | |
859 | for make-docfile to see. We cannot put this in the real DEFUN | |
860 | due to limits in the Unix cpp. | |
861 | ||
2fcea188 | 862 | DEFUN ("modify-syntax-entry", foo, bar, 2, 3, 0, |
8489eb67 RS |
863 | "Set syntax for character CHAR according to string S.\n\ |
864 | The syntax is changed only for table TABLE, which defaults to\n\ | |
865 | the current buffer's syntax table.\n\ | |
866 | The first character of S should be one of the following:\n\ | |
32676c08 JB |
867 | Space or - whitespace syntax. w word constituent.\n\ |
868 | _ symbol constituent. . punctuation.\n\ | |
869 | ( open-parenthesis. ) close-parenthesis.\n\ | |
870 | \" string quote. \\ escape.\n\ | |
871 | $ paired delimiter. ' expression quote or prefix operator.\n\ | |
abae13bd | 872 | < comment starter. > comment ender.\n\ |
6cb71bf6 | 873 | / character-quote. @ inherit from `standard-syntax-table'.\n\ |
abae13bd | 874 | \n\ |
8489eb67 RS |
875 | Only single-character comment start and end sequences are represented thus.\n\ |
876 | Two-character sequences are represented as described below.\n\ | |
877 | The second character of S is the matching parenthesis,\n\ | |
878 | used only if the first character is `(' or `)'.\n\ | |
879 | Any additional characters are flags.\n\ | |
95ff8dfc | 880 | Defined flags are the characters 1, 2, 3, 4, b, p, and n.\n\ |
2203e1e8 EN |
881 | 1 means CHAR is the start of a two-char comment start sequence.\n\ |
882 | 2 means CHAR is the second character of such a sequence.\n\ | |
883 | 3 means CHAR is the start of a two-char comment end sequence.\n\ | |
884 | 4 means CHAR is the second character of such a sequence.\n\ | |
e5d4f4dc | 885 | \n\ |
195d1361 | 886 | There can be up to two orthogonal comment sequences. This is to support\n\ |
e5d4f4dc | 887 | language modes such as C++. By default, all comment sequences are of style\n\ |
abae13bd RS |
888 | a, but you can set the comment sequence style to b (on the second character\n\ |
889 | of a comment-start, or the first character of a comment-end sequence) using\n\ | |
e5d4f4dc | 890 | this flag:\n\ |
2203e1e8 | 891 | b means CHAR is part of comment sequence b.\n\ |
95ff8dfc | 892 | n means CHAR is part of a nestable comment sequence.\n\ |
e5d4f4dc | 893 | \n\ |
2203e1e8 | 894 | p means CHAR is a prefix character for `backward-prefix-chars';\n\ |
e5d4f4dc | 895 | such characters are treated as whitespace when they occur\n\ |
8489eb67 | 896 | between expressions.") |
2fcea188 | 897 | (char, s, table) |
8489eb67 RS |
898 | */ |
899 | ||
900 | DEFUN ("modify-syntax-entry", Fmodify_syntax_entry, Smodify_syntax_entry, 2, 3, | |
901 | /* I really don't know why this is interactive | |
902 | help-form should at least be made useful whilst reading the second arg | |
903 | */ | |
904 | "cSet syntax for character: \nsSet syntax for %s to: ", | |
905 | 0 /* See immediately above */) | |
906 | (c, newentry, syntax_table) | |
907 | Lisp_Object c, newentry, syntax_table; | |
908 | { | |
8ea151b2 | 909 | register unsigned char *p; |
8489eb67 | 910 | register enum syntaxcode code; |
247e20a8 | 911 | int val; |
8ea151b2 | 912 | Lisp_Object match; |
8489eb67 RS |
913 | |
914 | CHECK_NUMBER (c, 0); | |
915 | CHECK_STRING (newentry, 1); | |
8ea151b2 | 916 | |
265a9e55 | 917 | if (NILP (syntax_table)) |
8489eb67 RS |
918 | syntax_table = current_buffer->syntax_table; |
919 | else | |
8ea151b2 | 920 | check_syntax_table (syntax_table); |
8489eb67 RS |
921 | |
922 | p = XSTRING (newentry)->data; | |
923 | code = (enum syntaxcode) syntax_spec_code[*p++]; | |
924 | if (((int) code & 0377) == 0377) | |
2e34157c | 925 | error ("invalid syntax description letter: %c", p[-1]); |
8489eb67 | 926 | |
8ea151b2 RS |
927 | if (code == Sinherit) |
928 | { | |
e704cb4b | 929 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), Qnil); |
8ea151b2 RS |
930 | return Qnil; |
931 | } | |
932 | ||
933 | if (*p) | |
d1be9f0f | 934 | { |
93da5fff | 935 | int len; |
7c19e8e1 KH |
936 | int character = (STRING_CHAR_AND_LENGTH |
937 | (p, STRING_BYTES (XSTRING (newentry)) - 1, len)); | |
93da5fff | 938 | XSETINT (match, character); |
d1be9f0f RS |
939 | if (XFASTINT (match) == ' ') |
940 | match = Qnil; | |
93da5fff | 941 | p += len; |
d1be9f0f RS |
942 | } |
943 | else | |
8ea151b2 | 944 | match = Qnil; |
8489eb67 | 945 | |
8ea151b2 | 946 | val = (int) code; |
8489eb67 RS |
947 | while (*p) |
948 | switch (*p++) | |
949 | { | |
950 | case '1': | |
247e20a8 | 951 | val |= 1 << 16; |
8489eb67 RS |
952 | break; |
953 | ||
954 | case '2': | |
247e20a8 | 955 | val |= 1 << 17; |
8489eb67 RS |
956 | break; |
957 | ||
958 | case '3': | |
247e20a8 | 959 | val |= 1 << 18; |
8489eb67 RS |
960 | break; |
961 | ||
962 | case '4': | |
247e20a8 | 963 | val |= 1 << 19; |
8489eb67 RS |
964 | break; |
965 | ||
966 | case 'p': | |
247e20a8 | 967 | val |= 1 << 20; |
8489eb67 | 968 | break; |
e5d4f4dc RS |
969 | |
970 | case 'b': | |
247e20a8 | 971 | val |= 1 << 21; |
e5d4f4dc | 972 | break; |
95ff8dfc RS |
973 | |
974 | case 'n': | |
975 | val |= 1 << 22; | |
976 | break; | |
8489eb67 RS |
977 | } |
978 | ||
93da5fff KH |
979 | if (val < XVECTOR (Vsyntax_code_object)->size && NILP (match)) |
980 | newentry = XVECTOR (Vsyntax_code_object)->contents[val]; | |
981 | else | |
982 | /* Since we can't use a shared object, let's make a new one. */ | |
983 | newentry = Fcons (make_number (val), match); | |
984 | ||
e704cb4b | 985 | SET_RAW_SYNTAX_ENTRY (syntax_table, XINT (c), newentry); |
8489eb67 RS |
986 | |
987 | return Qnil; | |
988 | } | |
989 | \f | |
990 | /* Dump syntax table to buffer in human-readable format */ | |
991 | ||
340f92b5 | 992 | static void |
8489eb67 RS |
993 | describe_syntax (value) |
994 | Lisp_Object value; | |
995 | { | |
996 | register enum syntaxcode code; | |
e6365855 | 997 | char desc, start1, start2, end1, end2, prefix, comstyle, comnested; |
8489eb67 | 998 | char str[2]; |
8ea151b2 | 999 | Lisp_Object first, match_lisp; |
8489eb67 RS |
1000 | |
1001 | Findent_to (make_number (16), make_number (1)); | |
1002 | ||
8ea151b2 RS |
1003 | if (NILP (value)) |
1004 | { | |
93da5fff | 1005 | insert_string ("default\n"); |
8ea151b2 RS |
1006 | return; |
1007 | } | |
1008 | ||
908b7fea KH |
1009 | if (CHAR_TABLE_P (value)) |
1010 | { | |
1011 | insert_string ("deeper char-table ...\n"); | |
1012 | return; | |
1013 | } | |
1014 | ||
8ea151b2 RS |
1015 | if (!CONSP (value)) |
1016 | { | |
93da5fff | 1017 | insert_string ("invalid\n"); |
8ea151b2 RS |
1018 | return; |
1019 | } | |
1020 | ||
c1d497be KR |
1021 | first = XCAR (value); |
1022 | match_lisp = XCDR (value); | |
8ea151b2 RS |
1023 | |
1024 | if (!INTEGERP (first) || !(NILP (match_lisp) || INTEGERP (match_lisp))) | |
8489eb67 | 1025 | { |
93da5fff | 1026 | insert_string ("invalid\n"); |
8489eb67 RS |
1027 | return; |
1028 | } | |
1029 | ||
e704cb4b | 1030 | code = (enum syntaxcode) (XINT (first) & 0377); |
8ea151b2 RS |
1031 | start1 = (XINT (first) >> 16) & 1; |
1032 | start2 = (XINT (first) >> 17) & 1; | |
1033 | end1 = (XINT (first) >> 18) & 1; | |
1034 | end2 = (XINT (first) >> 19) & 1; | |
1035 | prefix = (XINT (first) >> 20) & 1; | |
1036 | comstyle = (XINT (first) >> 21) & 1; | |
e6365855 | 1037 | comnested = (XINT (first) >> 22) & 1; |
8489eb67 RS |
1038 | |
1039 | if ((int) code < 0 || (int) code >= (int) Smax) | |
1040 | { | |
1041 | insert_string ("invalid"); | |
1042 | return; | |
1043 | } | |
1044 | desc = syntax_code_spec[(int) code]; | |
1045 | ||
1046 | str[0] = desc, str[1] = 0; | |
1047 | insert (str, 1); | |
1048 | ||
93da5fff KH |
1049 | if (NILP (match_lisp)) |
1050 | insert (" ", 1); | |
1051 | else | |
1052 | insert_char (XINT (match_lisp)); | |
8489eb67 | 1053 | |
8489eb67 RS |
1054 | if (start1) |
1055 | insert ("1", 1); | |
1056 | if (start2) | |
1057 | insert ("2", 1); | |
1058 | ||
1059 | if (end1) | |
1060 | insert ("3", 1); | |
1061 | if (end2) | |
1062 | insert ("4", 1); | |
1063 | ||
1064 | if (prefix) | |
1065 | insert ("p", 1); | |
e5d4f4dc RS |
1066 | if (comstyle) |
1067 | insert ("b", 1); | |
e6365855 SM |
1068 | if (comnested) |
1069 | insert ("n", 1); | |
8489eb67 RS |
1070 | |
1071 | insert_string ("\twhich means: "); | |
1072 | ||
0220c518 | 1073 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
1074 | { |
1075 | case Swhitespace: | |
1076 | insert_string ("whitespace"); break; | |
1077 | case Spunct: | |
1078 | insert_string ("punctuation"); break; | |
1079 | case Sword: | |
1080 | insert_string ("word"); break; | |
1081 | case Ssymbol: | |
1082 | insert_string ("symbol"); break; | |
1083 | case Sopen: | |
1084 | insert_string ("open"); break; | |
1085 | case Sclose: | |
1086 | insert_string ("close"); break; | |
1087 | case Squote: | |
1088 | insert_string ("quote"); break; | |
1089 | case Sstring: | |
1090 | insert_string ("string"); break; | |
1091 | case Smath: | |
1092 | insert_string ("math"); break; | |
1093 | case Sescape: | |
1094 | insert_string ("escape"); break; | |
1095 | case Scharquote: | |
1096 | insert_string ("charquote"); break; | |
1097 | case Scomment: | |
1098 | insert_string ("comment"); break; | |
1099 | case Sendcomment: | |
1100 | insert_string ("endcomment"); break; | |
1101 | default: | |
1102 | insert_string ("invalid"); | |
1103 | return; | |
1104 | } | |
1105 | ||
8ea151b2 | 1106 | if (!NILP (match_lisp)) |
8489eb67 RS |
1107 | { |
1108 | insert_string (", matches "); | |
8ea151b2 | 1109 | insert_char (XINT (match_lisp)); |
8489eb67 RS |
1110 | } |
1111 | ||
1112 | if (start1) | |
1113 | insert_string (",\n\t is the first character of a comment-start sequence"); | |
1114 | if (start2) | |
1115 | insert_string (",\n\t is the second character of a comment-start sequence"); | |
1116 | ||
1117 | if (end1) | |
1118 | insert_string (",\n\t is the first character of a comment-end sequence"); | |
1119 | if (end2) | |
1120 | insert_string (",\n\t is the second character of a comment-end sequence"); | |
e5d4f4dc RS |
1121 | if (comstyle) |
1122 | insert_string (" (comment style b)"); | |
e6365855 SM |
1123 | if (comnested) |
1124 | insert_string (" (nestable)"); | |
e5d4f4dc | 1125 | |
8489eb67 RS |
1126 | if (prefix) |
1127 | insert_string (",\n\t is a prefix character for `backward-prefix-chars'"); | |
1128 | ||
1129 | insert_string ("\n"); | |
1130 | } | |
1131 | ||
340f92b5 | 1132 | static Lisp_Object |
8489eb67 RS |
1133 | describe_syntax_1 (vector) |
1134 | Lisp_Object vector; | |
1135 | { | |
1136 | struct buffer *old = current_buffer; | |
1137 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
e41819d4 | 1138 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil, (int *) 0, 0); |
93da5fff KH |
1139 | while (! NILP (XCHAR_TABLE (vector)->parent)) |
1140 | { | |
1141 | vector = XCHAR_TABLE (vector)->parent; | |
1142 | insert_string ("\nThe parent syntax table is:"); | |
e41819d4 RS |
1143 | describe_vector (vector, Qnil, describe_syntax, 0, Qnil, Qnil, |
1144 | (int *) 0, 0); | |
93da5fff KH |
1145 | } |
1146 | ||
36cd82fe | 1147 | call0 (intern ("help-mode")); |
8489eb67 RS |
1148 | set_buffer_internal (old); |
1149 | return Qnil; | |
1150 | } | |
1151 | ||
1152 | DEFUN ("describe-syntax", Fdescribe_syntax, Sdescribe_syntax, 0, 0, "", | |
1153 | "Describe the syntax specifications in the syntax table.\n\ | |
1154 | The descriptions are inserted in a buffer, which is then displayed.") | |
1155 | () | |
1156 | { | |
1157 | internal_with_output_to_temp_buffer | |
1158 | ("*Help*", describe_syntax_1, current_buffer->syntax_table); | |
1159 | ||
1160 | return Qnil; | |
1161 | } | |
1162 | \f | |
195d1361 RS |
1163 | int parse_sexp_ignore_comments; |
1164 | ||
8489eb67 RS |
1165 | /* Return the position across COUNT words from FROM. |
1166 | If that many words cannot be found before the end of the buffer, return 0. | |
1167 | COUNT negative means scan backward and stop at word beginning. */ | |
1168 | ||
dfcf069d | 1169 | int |
8489eb67 RS |
1170 | scan_words (from, count) |
1171 | register int from, count; | |
1172 | { | |
1173 | register int beg = BEGV; | |
1174 | register int end = ZV; | |
6a140a74 | 1175 | register int from_byte = CHAR_TO_BYTE (from); |
93da5fff KH |
1176 | register enum syntaxcode code; |
1177 | int ch0, ch1; | |
8489eb67 RS |
1178 | |
1179 | immediate_quit = 1; | |
1180 | QUIT; | |
1181 | ||
195d1361 RS |
1182 | SETUP_SYNTAX_TABLE (from, count); |
1183 | ||
8489eb67 RS |
1184 | while (count > 0) |
1185 | { | |
1186 | while (1) | |
1187 | { | |
1188 | if (from == end) | |
1189 | { | |
1190 | immediate_quit = 0; | |
1191 | return 0; | |
1192 | } | |
195d1361 | 1193 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1194 | ch0 = FETCH_CHAR (from_byte); |
93da5fff | 1195 | code = SYNTAX (ch0); |
6a140a74 | 1196 | INC_BOTH (from, from_byte); |
8489eb67 RS |
1197 | if (words_include_escapes |
1198 | && (code == Sescape || code == Scharquote)) | |
1199 | break; | |
1200 | if (code == Sword) | |
1201 | break; | |
8489eb67 | 1202 | } |
93da5fff KH |
1203 | /* Now CH0 is a character which begins a word and FROM is the |
1204 | position of the next character. */ | |
8489eb67 RS |
1205 | while (1) |
1206 | { | |
1207 | if (from == end) break; | |
195d1361 | 1208 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 1209 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1210 | code = SYNTAX (ch1); |
8489eb67 RS |
1211 | if (!(words_include_escapes |
1212 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1213 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1214 | break; |
6a140a74 | 1215 | INC_BOTH (from, from_byte); |
93da5fff | 1216 | ch0 = ch1; |
8489eb67 RS |
1217 | } |
1218 | count--; | |
1219 | } | |
1220 | while (count < 0) | |
1221 | { | |
1222 | while (1) | |
1223 | { | |
1224 | if (from == beg) | |
1225 | { | |
1226 | immediate_quit = 0; | |
1227 | return 0; | |
1228 | } | |
6a140a74 | 1229 | DEC_BOTH (from, from_byte); |
195d1361 | 1230 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1231 | ch1 = FETCH_CHAR (from_byte); |
93da5fff | 1232 | code = SYNTAX (ch1); |
8489eb67 RS |
1233 | if (words_include_escapes |
1234 | && (code == Sescape || code == Scharquote)) | |
1235 | break; | |
1236 | if (code == Sword) | |
1237 | break; | |
8489eb67 | 1238 | } |
93da5fff KH |
1239 | /* Now CH1 is a character which ends a word and FROM is the |
1240 | position of it. */ | |
8489eb67 RS |
1241 | while (1) |
1242 | { | |
6a140a74 RS |
1243 | int temp_byte; |
1244 | ||
1245 | if (from == beg) | |
1246 | break; | |
1247 | temp_byte = dec_bytepos (from_byte); | |
195d1361 | 1248 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 1249 | ch0 = FETCH_CHAR (temp_byte); |
93da5fff | 1250 | code = SYNTAX (ch0); |
8489eb67 RS |
1251 | if (!(words_include_escapes |
1252 | && (code == Sescape || code == Scharquote))) | |
93da5fff | 1253 | if (code != Sword || WORD_BOUNDARY_P (ch0, ch1)) |
8489eb67 | 1254 | break; |
6a140a74 | 1255 | DEC_BOTH (from, from_byte); |
93da5fff | 1256 | ch1 = ch0; |
8489eb67 RS |
1257 | } |
1258 | count++; | |
1259 | } | |
1260 | ||
1261 | immediate_quit = 0; | |
1262 | ||
1263 | return from; | |
1264 | } | |
1265 | ||
1266 | DEFUN ("forward-word", Fforward_word, Sforward_word, 1, 1, "p", | |
1267 | "Move point forward ARG words (backward if ARG is negative).\n\ | |
1268 | Normally returns t.\n\ | |
2c6ea900 | 1269 | If an edge of the buffer or a field boundary is reached, point is left there\n\ |
e6d8341f GM |
1270 | and the function returns nil. Field boundaries are not noticed if\n\ |
1271 | `inhibit-field-text-motion' is non-nil.") | |
8489eb67 RS |
1272 | (count) |
1273 | Lisp_Object count; | |
1274 | { | |
2c6ea900 | 1275 | int orig_val, val; |
8489eb67 RS |
1276 | CHECK_NUMBER (count, 0); |
1277 | ||
2c6ea900 RS |
1278 | val = orig_val = scan_words (PT, XINT (count)); |
1279 | if (! orig_val) | |
1280 | val = XINT (count) > 0 ? ZV : BEGV; | |
5878ee6f | 1281 | |
b8855607 | 1282 | /* Avoid jumping out of an input field. */ |
64aa4eb1 | 1283 | val = XFASTINT (Fconstrain_to_field (make_number (val), make_number (PT), |
070fe99c | 1284 | Qt, Qnil, Qnil)); |
64aa4eb1 | 1285 | |
8489eb67 | 1286 | SET_PT (val); |
e6d8341f | 1287 | return val == orig_val ? Qt : Qnil; |
8489eb67 RS |
1288 | } |
1289 | \f | |
195d1361 RS |
1290 | Lisp_Object skip_chars (); |
1291 | ||
1292 | DEFUN ("skip-chars-forward", Fskip_chars_forward, Sskip_chars_forward, 1, 2, 0, | |
1293 | "Move point forward, stopping before a char not in STRING, or at pos LIM.\n\ | |
1294 | STRING is like the inside of a `[...]' in a regular expression\n\ | |
74cf0beb RS |
1295 | except that `]' is never special and `\\' quotes `^', `-' or `\\'\n\ |
1296 | (but not as the end of a range; quoting is never needed there).\n\ | |
195d1361 RS |
1297 | Thus, with arg \"a-zA-Z\", this skips letters stopping before first nonletter.\n\ |
1298 | With arg \"^a-zA-Z\", skips nonletters stopping before first letter.\n\ | |
1299 | Returns the distance traveled, either zero or positive.") | |
1300 | (string, lim) | |
1301 | Lisp_Object string, lim; | |
1302 | { | |
1303 | return skip_chars (1, 0, string, lim); | |
1304 | } | |
1305 | ||
1306 | DEFUN ("skip-chars-backward", Fskip_chars_backward, Sskip_chars_backward, 1, 2, 0, | |
1307 | "Move point backward, stopping after a char not in STRING, or at pos LIM.\n\ | |
1308 | See `skip-chars-forward' for details.\n\ | |
1309 | Returns the distance traveled, either zero or negative.") | |
1310 | (string, lim) | |
1311 | Lisp_Object string, lim; | |
1312 | { | |
1313 | return skip_chars (0, 0, string, lim); | |
1314 | } | |
1315 | ||
1316 | DEFUN ("skip-syntax-forward", Fskip_syntax_forward, Sskip_syntax_forward, 1, 2, 0, | |
1317 | "Move point forward across chars in specified syntax classes.\n\ | |
1318 | SYNTAX is a string of syntax code characters.\n\ | |
1319 | Stop before a char whose syntax is not in SYNTAX, or at position LIM.\n\ | |
1320 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\ | |
1321 | This function returns the distance traveled, either zero or positive.") | |
1322 | (syntax, lim) | |
1323 | Lisp_Object syntax, lim; | |
1324 | { | |
1325 | return skip_chars (1, 1, syntax, lim); | |
1326 | } | |
1327 | ||
1328 | DEFUN ("skip-syntax-backward", Fskip_syntax_backward, Sskip_syntax_backward, 1, 2, 0, | |
1329 | "Move point backward across chars in specified syntax classes.\n\ | |
1330 | SYNTAX is a string of syntax code characters.\n\ | |
1331 | Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM.\n\ | |
1332 | If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\ | |
1333 | This function returns the distance traveled, either zero or negative.") | |
1334 | (syntax, lim) | |
1335 | Lisp_Object syntax, lim; | |
1336 | { | |
1337 | return skip_chars (0, 1, syntax, lim); | |
1338 | } | |
1339 | ||
6a140a74 | 1340 | static Lisp_Object |
195d1361 RS |
1341 | skip_chars (forwardp, syntaxp, string, lim) |
1342 | int forwardp, syntaxp; | |
1343 | Lisp_Object string, lim; | |
1344 | { | |
195d1361 | 1345 | register unsigned int c; |
7e68b0ea | 1346 | register int ch; |
195d1361 | 1347 | unsigned char fastmap[0400]; |
7e68b0ea RS |
1348 | /* If SYNTAXP is 0, STRING may contain multi-byte form of characters |
1349 | of which codes don't fit in FASTMAP. In that case, we set the | |
1350 | first byte of multibyte form (i.e. base leading-code) in FASTMAP | |
1351 | and set the actual ranges of characters in CHAR_RANGES. In the | |
1352 | form "X-Y" of STRING, both X and Y must belong to the same | |
1353 | character set because a range striding across character sets is | |
1354 | meaningless. */ | |
5df4982e | 1355 | int *char_ranges; |
7e68b0ea | 1356 | int n_char_ranges = 0; |
195d1361 | 1357 | int negate = 0; |
4101e6fe | 1358 | register int i, i_byte; |
7e68b0ea | 1359 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
1674d9a2 RS |
1360 | int string_multibyte; |
1361 | int size_byte; | |
82d497fc KH |
1362 | unsigned char *str; |
1363 | int len; | |
195d1361 RS |
1364 | |
1365 | CHECK_STRING (string, 0); | |
5df4982e | 1366 | char_ranges = (int *) alloca (XSTRING (string)->size * (sizeof (int)) * 2); |
1674d9a2 | 1367 | string_multibyte = STRING_MULTIBYTE (string); |
82d497fc | 1368 | str = XSTRING (string)->data; |
1674d9a2 | 1369 | size_byte = STRING_BYTES (XSTRING (string)); |
195d1361 | 1370 | |
82d497fc KH |
1371 | /* Adjust the multibyteness of the string to that of the buffer. */ |
1372 | if (multibyte != string_multibyte) | |
1373 | { | |
1374 | int nbytes; | |
1375 | ||
1376 | if (multibyte) | |
1377 | nbytes = count_size_as_multibyte (XSTRING (string)->data, | |
1378 | XSTRING (string)->size); | |
1379 | else | |
1380 | nbytes = XSTRING (string)->size; | |
1381 | if (nbytes != size_byte) | |
1382 | { | |
1383 | str = (unsigned char *) alloca (nbytes); | |
e39091b6 | 1384 | copy_text (XSTRING (string)->data, str, size_byte, |
82d497fc KH |
1385 | string_multibyte, multibyte); |
1386 | size_byte = nbytes; | |
1387 | } | |
1388 | } | |
1389 | ||
195d1361 RS |
1390 | if (NILP (lim)) |
1391 | XSETINT (lim, forwardp ? ZV : BEGV); | |
1392 | else | |
6a140a74 | 1393 | CHECK_NUMBER_COERCE_MARKER (lim, 0); |
195d1361 RS |
1394 | |
1395 | /* In any case, don't allow scan outside bounds of buffer. */ | |
195d1361 RS |
1396 | if (XINT (lim) > ZV) |
1397 | XSETFASTINT (lim, ZV); | |
1398 | if (XINT (lim) < BEGV) | |
1399 | XSETFASTINT (lim, BEGV); | |
1400 | ||
195d1361 RS |
1401 | bzero (fastmap, sizeof fastmap); |
1402 | ||
82d497fc | 1403 | i_byte = 0; |
4101e6fe | 1404 | |
13090112 | 1405 | if (i_byte < size_byte |
4101e6fe | 1406 | && XSTRING (string)->data[0] == '^') |
195d1361 | 1407 | { |
82d497fc | 1408 | negate = 1; i_byte++; |
195d1361 RS |
1409 | } |
1410 | ||
1411 | /* Find the characters specified and set their elements of fastmap. | |
1412 | If syntaxp, each character counts as itself. | |
1413 | Otherwise, handle backslashes and ranges specially. */ | |
1414 | ||
13090112 | 1415 | while (i_byte < size_byte) |
195d1361 | 1416 | { |
82d497fc | 1417 | int c_leading_code = str[i_byte]; |
4101e6fe | 1418 | |
82d497fc KH |
1419 | c = STRING_CHAR_AND_LENGTH (str + i_byte, size_byte - i_byte, len); |
1420 | i_byte += len; | |
4101e6fe | 1421 | |
195d1361 | 1422 | if (syntaxp) |
4101e6fe | 1423 | fastmap[syntax_spec_code[c & 0377]] = 1; |
195d1361 RS |
1424 | else |
1425 | { | |
1426 | if (c == '\\') | |
1427 | { | |
13090112 | 1428 | if (i_byte == size_byte) |
4101e6fe RS |
1429 | break; |
1430 | ||
82d497fc KH |
1431 | c_leading_code = str[i_byte]; |
1432 | c = STRING_CHAR_AND_LENGTH (str+i_byte, size_byte-i_byte, len); | |
1433 | i_byte += len; | |
195d1361 | 1434 | } |
13090112 | 1435 | if (i_byte < size_byte |
82d497fc | 1436 | && str[i_byte] == '-') |
195d1361 | 1437 | { |
06274af5 | 1438 | unsigned int c2, c2_leading_code; |
4101e6fe RS |
1439 | |
1440 | /* Skip over the dash. */ | |
82d497fc | 1441 | i_byte++; |
4101e6fe | 1442 | |
13090112 | 1443 | if (i_byte == size_byte) |
4101e6fe RS |
1444 | break; |
1445 | ||
1446 | /* Get the end of the range. */ | |
82d497fc KH |
1447 | c2_leading_code = str[i_byte]; |
1448 | c2 =STRING_CHAR_AND_LENGTH (str+i_byte, size_byte-i_byte, len); | |
1449 | i_byte += len; | |
7e68b0ea | 1450 | |
4101e6fe | 1451 | if (SINGLE_BYTE_CHAR_P (c)) |
06274af5 KH |
1452 | { |
1453 | if (! SINGLE_BYTE_CHAR_P (c2)) | |
e39091b6 KH |
1454 | { |
1455 | /* Handle a range such as \177-\377 in multibyte | |
1456 | mode. Split that into two ranges, the low | |
1457 | one ending at 0237, and the high one starting | |
1458 | at the smallest character in the charset of | |
1459 | C2 and ending at C2. */ | |
1460 | int charset = CHAR_CHARSET (c2); | |
1461 | int c1 = MAKE_CHAR (charset, 0, 0); | |
1462 | ||
1463 | fastmap[c2_leading_code] = 1; | |
1464 | char_ranges[n_char_ranges++] = c1; | |
1465 | char_ranges[n_char_ranges++] = c2; | |
1466 | c2 = 0237; | |
1467 | } | |
06274af5 KH |
1468 | while (c <= c2) |
1469 | { | |
1470 | fastmap[c] = 1; | |
1471 | c++; | |
1472 | } | |
1473 | } | |
e39091b6 | 1474 | else if (! SINGLE_BYTE_CHAR_P (c2)) |
195d1361 | 1475 | { |
06274af5 | 1476 | if (c_leading_code != c2_leading_code) |
688351f2 | 1477 | error ("Invalid character range: %s", |
06274af5 | 1478 | XSTRING (string)->data); |
4101e6fe RS |
1479 | if (c <= c2) |
1480 | { | |
e39091b6 | 1481 | fastmap[c_leading_code] = 1; |
4101e6fe RS |
1482 | char_ranges[n_char_ranges++] = c; |
1483 | char_ranges[n_char_ranges++] = c2; | |
1484 | } | |
195d1361 | 1485 | } |
195d1361 RS |
1486 | } |
1487 | else | |
7e68b0ea | 1488 | { |
e39091b6 KH |
1489 | if (SINGLE_BYTE_CHAR_P (c)) |
1490 | fastmap[c] = 1; | |
1491 | else | |
7e68b0ea | 1492 | { |
e39091b6 | 1493 | fastmap[c_leading_code] = 1; |
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 | ||
7e68b0ea RS |
1501 | /* If ^ was the first character, complement the fastmap. In |
1502 | addition, as all multibyte characters have possibility of | |
1503 | matching, set all entries for base leading codes, which is | |
1504 | harmless even if SYNTAXP is 1. */ | |
195d1361 RS |
1505 | |
1506 | if (negate) | |
1507 | for (i = 0; i < sizeof fastmap; i++) | |
7e68b0ea RS |
1508 | { |
1509 | if (!multibyte || !BASE_LEADING_CODE_P (i)) | |
1510 | fastmap[i] ^= 1; | |
1511 | else | |
1512 | fastmap[i] = 1; | |
1513 | } | |
195d1361 RS |
1514 | |
1515 | { | |
1516 | int start_point = PT; | |
1517 | int pos = PT; | |
6a140a74 | 1518 | int pos_byte = PT_BYTE; |
195d1361 RS |
1519 | |
1520 | immediate_quit = 1; | |
1521 | if (syntaxp) | |
1522 | { | |
1523 | SETUP_SYNTAX_TABLE (pos, forwardp ? 1 : -1); | |
1524 | if (forwardp) | |
1525 | { | |
7e68b0ea | 1526 | if (multibyte) |
195d1361 | 1527 | { |
ee0cdb48 KH |
1528 | if (pos < XINT (lim)) |
1529 | while (fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))]) | |
1530 | { | |
1531 | /* Since we already checked for multibyteness, | |
1532 | avoid using INC_BOTH which checks again. */ | |
1533 | INC_POS (pos_byte); | |
1534 | pos++; | |
1535 | if (pos >= XINT (lim)) | |
1536 | break; | |
1537 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1538 | } | |
7e68b0ea RS |
1539 | } |
1540 | else | |
1541 | { | |
1542 | while (pos < XINT (lim) | |
1543 | && fastmap[(int) SYNTAX (FETCH_BYTE (pos))]) | |
1544 | { | |
1545 | pos++; | |
1546 | UPDATE_SYNTAX_TABLE_FORWARD (pos); | |
1547 | } | |
195d1361 RS |
1548 | } |
1549 | } | |
1550 | else | |
1551 | { | |
7e68b0ea | 1552 | if (multibyte) |
195d1361 | 1553 | { |
7e68b0ea RS |
1554 | while (pos > XINT (lim)) |
1555 | { | |
6a140a74 | 1556 | int savepos = pos_byte; |
ef316cf0 RS |
1557 | /* Since we already checked for multibyteness, |
1558 | avoid using DEC_BOTH which checks again. */ | |
1559 | pos--; | |
1560 | DEC_POS (pos_byte); | |
4c8535eb | 1561 | UPDATE_SYNTAX_TABLE_BACKWARD (pos); |
6a140a74 | 1562 | if (!fastmap[(int) SYNTAX (FETCH_CHAR (pos_byte))]) |
7e68b0ea | 1563 | { |
6a140a74 RS |
1564 | pos++; |
1565 | pos_byte = savepos; | |
7e68b0ea RS |
1566 | break; |
1567 | } | |
7e68b0ea RS |
1568 | } |
1569 | } | |
1570 | else | |
1571 | { | |
ee0cdb48 KH |
1572 | if (pos > XINT (lim)) |
1573 | while (fastmap[(int) SYNTAX (FETCH_BYTE (pos - 1))]) | |
1574 | { | |
1575 | pos--; | |
1576 | if (pos <= XINT (lim)) | |
4c8535eb | 1577 | break; |
ee0cdb48 KH |
1578 | UPDATE_SYNTAX_TABLE_BACKWARD (pos - 1); |
1579 | } | |
195d1361 RS |
1580 | } |
1581 | } | |
1582 | } | |
1583 | else | |
1584 | { | |
1585 | if (forwardp) | |
1586 | { | |
7e68b0ea | 1587 | if (multibyte) |
6a140a74 | 1588 | while (pos < XINT (lim) && fastmap[(c = FETCH_BYTE (pos_byte))]) |
7e68b0ea | 1589 | { |
e39091b6 KH |
1590 | /* If we are looking at a multibyte character, we |
1591 | must look up the character in the table | |
1592 | CHAR_RANGES. If there's no data in the table, | |
1593 | that character is not what we want to skip. */ | |
1594 | if (BASE_LEADING_CODE_P (c) | |
1595 | && (c = FETCH_MULTIBYTE_CHAR (pos_byte), | |
1596 | ! SINGLE_BYTE_CHAR_P (c))) | |
7e68b0ea | 1597 | { |
e39091b6 KH |
1598 | /* The following code do the right thing even if |
1599 | n_char_ranges is zero (i.e. no data in | |
1600 | CHAR_RANGES). */ | |
7e68b0ea | 1601 | for (i = 0; i < n_char_ranges; i += 2) |
e39091b6 | 1602 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) |
7e68b0ea RS |
1603 | break; |
1604 | if (!(negate ^ (i < n_char_ranges))) | |
1605 | break; | |
7e68b0ea | 1606 | } |
e39091b6 | 1607 | INC_BOTH (pos, pos_byte); |
7e68b0ea RS |
1608 | } |
1609 | else | |
1610 | while (pos < XINT (lim) && fastmap[FETCH_BYTE (pos)]) | |
1611 | pos++; | |
195d1361 RS |
1612 | } |
1613 | else | |
1614 | { | |
7e68b0ea RS |
1615 | if (multibyte) |
1616 | while (pos > XINT (lim)) | |
1617 | { | |
e39091b6 KH |
1618 | int prev_pos_byte = pos_byte; |
1619 | ||
1620 | DEC_POS (prev_pos_byte); | |
1621 | if (!fastmap[(c = FETCH_BYTE (prev_pos_byte))]) | |
1622 | break; | |
1623 | ||
1624 | /* See the comment in the previous similar code. */ | |
1625 | if (BASE_LEADING_CODE_P (c) | |
1626 | && (c = FETCH_MULTIBYTE_CHAR (prev_pos_byte), | |
1627 | ! SINGLE_BYTE_CHAR_P (c))) | |
7e68b0ea | 1628 | { |
e39091b6 KH |
1629 | for (i = 0; i < n_char_ranges; i += 2) |
1630 | if (c >= char_ranges[i] && c <= char_ranges[i + 1]) | |
1631 | break; | |
1632 | if (!(negate ^ (i < n_char_ranges))) | |
1633 | break; | |
7e68b0ea | 1634 | } |
e39091b6 KH |
1635 | pos--; |
1636 | pos_byte = prev_pos_byte; | |
7e68b0ea RS |
1637 | } |
1638 | else | |
1639 | while (pos > XINT (lim) && fastmap[FETCH_BYTE (pos - 1)]) | |
1640 | pos--; | |
195d1361 RS |
1641 | } |
1642 | } | |
7e68b0ea | 1643 | |
6a140a74 RS |
1644 | #if 0 /* Not needed now that a position in mid-character |
1645 | cannot be specified in Lisp. */ | |
7e68b0ea RS |
1646 | if (multibyte |
1647 | /* INC_POS or DEC_POS might have moved POS over LIM. */ | |
1648 | && (forwardp ? (pos > XINT (lim)) : (pos < XINT (lim)))) | |
1649 | pos = XINT (lim); | |
6a140a74 | 1650 | #endif |
7e68b0ea | 1651 | |
6a140a74 RS |
1652 | if (! multibyte) |
1653 | pos_byte = pos; | |
1654 | ||
1655 | SET_PT_BOTH (pos, pos_byte); | |
195d1361 RS |
1656 | immediate_quit = 0; |
1657 | ||
1658 | return make_number (PT - start_point); | |
1659 | } | |
1660 | } | |
1661 | \f | |
95ff8dfc RS |
1662 | /* Jump over a comment, assuming we are at the beginning of one. |
1663 | FROM is the current position. | |
1664 | FROM_BYTE is the bytepos corresponding to FROM. | |
1665 | Do not move past STOP (a charpos). | |
1666 | The comment over which we have to jump is of style STYLE | |
1667 | (either SYNTAX_COMMENT_STYLE(foo) or ST_COMMENT_STYLE). | |
1668 | NESTING should be positive to indicate the nesting at the beginning | |
1669 | for nested comments and should be zero or negative else. | |
1670 | ST_COMMENT_STYLE cannot be nested. | |
1671 | PREV_SYNTAX is the SYNTAX_WITH_FLAGS of the previous character | |
1672 | (or 0 If the search cannot start in the middle of a two-character). | |
1673 | ||
1674 | If successful, return 1 and store the charpos of the comment's end | |
1675 | into *CHARPOS_PTR and the corresponding bytepos into *BYTEPOS_PTR. | |
1676 | Else, return 0 and store the charpos STOP into *CHARPOS_PTR, the | |
1677 | corresponding bytepos into *BYTEPOS_PTR and the current nesting | |
1678 | (as defined for state.incomment) in *INCOMMENT_PTR. | |
1679 | ||
1680 | The comment end is the last character of the comment rather than the | |
1681 | character just after the comment. | |
1682 | ||
1683 | Global syntax data is assumed to initially be valid for FROM and | |
1684 | remains valid for forward search starting at the returned position. */ | |
1685 | ||
1686 | static int | |
1687 | forw_comment (from, from_byte, stop, nesting, style, prev_syntax, | |
1688 | charpos_ptr, bytepos_ptr, incomment_ptr) | |
1689 | int from, from_byte, stop; | |
1690 | int nesting, style, prev_syntax; | |
1691 | int *charpos_ptr, *bytepos_ptr, *incomment_ptr; | |
1692 | { | |
1693 | register int c, c1; | |
1694 | register enum syntaxcode code; | |
1695 | register int syntax; | |
1696 | ||
1697 | if (nesting <= 0) nesting = -1; | |
1698 | ||
1699 | /* Enter the loop in the middle so that we find | |
1700 | a 2-char comment ender if we start in the middle of it. */ | |
1701 | syntax = prev_syntax; | |
1702 | if (syntax != 0) goto forw_incomment; | |
1703 | ||
1704 | while (1) | |
1705 | { | |
1706 | if (from == stop) | |
1707 | { | |
1708 | *incomment_ptr = nesting; | |
1709 | *charpos_ptr = from; | |
1710 | *bytepos_ptr = from_byte; | |
1711 | return 0; | |
1712 | } | |
1713 | c = FETCH_CHAR (from_byte); | |
1714 | syntax = SYNTAX_WITH_FLAGS (c); | |
1715 | code = syntax & 0xff; | |
1716 | if (code == Sendcomment | |
1717 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
1718 | && --nesting <= 0) | |
1719 | /* we have encountered a comment end of the same style | |
1720 | as the comment sequence which began this comment | |
1721 | section */ | |
1722 | break; | |
1723 | if (code == Scomment_fence | |
1724 | && style == ST_COMMENT_STYLE) | |
1725 | /* we have encountered a comment end of the same style | |
1726 | as the comment sequence which began this comment | |
1727 | section. */ | |
1728 | break; | |
1729 | if (nesting > 0 | |
1730 | && code == Scomment | |
1731 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style) | |
1732 | /* we have encountered a nested comment of the same style | |
1733 | as the comment sequence which began this comment section */ | |
1734 | nesting++; | |
1735 | INC_BOTH (from, from_byte); | |
1736 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1737 | ||
1738 | forw_incomment: | |
1739 | if (from < stop && SYNTAX_FLAGS_COMEND_FIRST (syntax) | |
1740 | && SYNTAX_FLAGS_COMMENT_STYLE (syntax) == style | |
1741 | && (c1 = FETCH_CHAR (from_byte), | |
1742 | SYNTAX_COMEND_SECOND (c1))) | |
4ffe723b GM |
1743 | { |
1744 | if (--nesting <= 0) | |
1745 | /* we have encountered a comment end of the same style | |
1746 | as the comment sequence which began this comment | |
1747 | section */ | |
1748 | break; | |
1749 | else | |
1750 | { | |
1751 | INC_BOTH (from, from_byte); | |
1752 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1753 | } | |
1754 | } | |
95ff8dfc RS |
1755 | if (nesting > 0 |
1756 | && from < stop | |
1757 | && SYNTAX_FLAGS_COMSTART_FIRST (syntax) | |
1758 | && (c1 = FETCH_CHAR (from_byte), | |
1759 | SYNTAX_COMMENT_STYLE (c1) == style | |
1760 | && SYNTAX_COMSTART_SECOND (c1))) | |
1761 | /* we have encountered a nested comment of the same style | |
1762 | as the comment sequence which began this comment | |
1763 | section */ | |
1764 | { | |
1765 | INC_BOTH (from, from_byte); | |
1766 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
1767 | nesting++; | |
1768 | } | |
1769 | } | |
1770 | *charpos_ptr = from; | |
1771 | *bytepos_ptr = from_byte; | |
1772 | return 1; | |
1773 | } | |
1774 | ||
b3cfe0c8 RS |
1775 | DEFUN ("forward-comment", Fforward_comment, Sforward_comment, 1, 1, 0, |
1776 | "Move forward across up to N comments. If N is negative, move backward.\n\ | |
b3cfe0c8 | 1777 | Stop scanning if we find something other than a comment or whitespace.\n\ |
c81a3712 | 1778 | Set point to where scanning stops.\n\ |
b3cfe0c8 RS |
1779 | If N comments are found as expected, with nothing except whitespace\n\ |
1780 | between them, return t; otherwise return nil.") | |
1781 | (count) | |
840f481c | 1782 | Lisp_Object count; |
b3cfe0c8 RS |
1783 | { |
1784 | register int from; | |
6a140a74 | 1785 | int from_byte; |
b3cfe0c8 | 1786 | register int stop; |
8ea151b2 | 1787 | register int c, c1; |
b3cfe0c8 RS |
1788 | register enum syntaxcode code; |
1789 | int comstyle = 0; /* style of comment encountered */ | |
95ff8dfc | 1790 | int comnested = 0; /* whether the comment is nestable or not */ |
be720845 | 1791 | int found; |
840f481c | 1792 | int count1; |
6a140a74 | 1793 | int out_charpos, out_bytepos; |
95ff8dfc | 1794 | int dummy; |
840f481c RS |
1795 | |
1796 | CHECK_NUMBER (count, 0); | |
1797 | count1 = XINT (count); | |
195d1361 | 1798 | stop = count1 > 0 ? ZV : BEGV; |
b3cfe0c8 RS |
1799 | |
1800 | immediate_quit = 1; | |
1801 | QUIT; | |
1802 | ||
1803 | from = PT; | |
6a140a74 | 1804 | from_byte = PT_BYTE; |
b3cfe0c8 | 1805 | |
195d1361 | 1806 | SETUP_SYNTAX_TABLE (from, count1); |
840f481c | 1807 | while (count1 > 0) |
b3cfe0c8 | 1808 | { |
04882296 | 1809 | do |
b3cfe0c8 | 1810 | { |
f902a008 RS |
1811 | int comstart_first; |
1812 | ||
04882296 KH |
1813 | if (from == stop) |
1814 | { | |
ef316cf0 | 1815 | SET_PT_BOTH (from, from_byte); |
b7e6e612 | 1816 | immediate_quit = 0; |
04882296 KH |
1817 | return Qnil; |
1818 | } | |
6a140a74 | 1819 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 | 1820 | code = SYNTAX (c); |
f902a008 | 1821 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 1822 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 1823 | comstyle = SYNTAX_COMMENT_STYLE (c); |
6a140a74 | 1824 | INC_BOTH (from, from_byte); |
f902a008 | 1825 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 1826 | if (from < stop && comstart_first |
6a140a74 | 1827 | && (c1 = FETCH_CHAR (from_byte), |
8ea151b2 | 1828 | SYNTAX_COMSTART_SECOND (c1))) |
b3cfe0c8 | 1829 | { |
7fc8191e RS |
1830 | /* We have encountered a comment start sequence and we |
1831 | are ignoring all text inside comments. We must record | |
b3cfe0c8 RS |
1832 | the comment style this sequence begins so that later, |
1833 | only a comment end of the same style actually ends | |
7fc8191e | 1834 | the comment section. */ |
b3cfe0c8 | 1835 | code = Scomment; |
8ea151b2 | 1836 | comstyle = SYNTAX_COMMENT_STYLE (c1); |
95ff8dfc | 1837 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); |
6a140a74 | 1838 | INC_BOTH (from, from_byte); |
95ff8dfc | 1839 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
b3cfe0c8 | 1840 | } |
1aa963c8 SM |
1841 | /* FIXME: here we ignore 2-char endcomments while we don't |
1842 | when going backwards. */ | |
04882296 KH |
1843 | } |
1844 | while (code == Swhitespace || code == Sendcomment); | |
6a140a74 | 1845 | |
da71ab91 KH |
1846 | if (code == Scomment_fence) |
1847 | comstyle = ST_COMMENT_STYLE; | |
1848 | else if (code != Scomment) | |
04882296 KH |
1849 | { |
1850 | immediate_quit = 0; | |
6a140a74 | 1851 | DEC_BOTH (from, from_byte); |
ef316cf0 | 1852 | SET_PT_BOTH (from, from_byte); |
04882296 KH |
1853 | return Qnil; |
1854 | } | |
1855 | /* We're at the start of a comment. */ | |
95ff8dfc RS |
1856 | found = forw_comment (from, from_byte, stop, comnested, comstyle, 0, |
1857 | &out_charpos, &out_bytepos, &dummy); | |
1858 | from = out_charpos; from_byte = out_bytepos; | |
1859 | if (!found) | |
04882296 | 1860 | { |
95ff8dfc RS |
1861 | immediate_quit = 0; |
1862 | SET_PT_BOTH (from, from_byte); | |
1863 | return Qnil; | |
b3cfe0c8 | 1864 | } |
95ff8dfc RS |
1865 | INC_BOTH (from, from_byte); |
1866 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
04882296 | 1867 | /* We have skipped one comment. */ |
840f481c | 1868 | count1--; |
b3cfe0c8 RS |
1869 | } |
1870 | ||
840f481c | 1871 | while (count1 < 0) |
b3cfe0c8 | 1872 | { |
b9145dbb | 1873 | while (1) |
b3cfe0c8 | 1874 | { |
f902a008 RS |
1875 | int quoted, comstart_second; |
1876 | ||
b9145dbb RS |
1877 | if (from <= stop) |
1878 | { | |
6a140a74 | 1879 | SET_PT_BOTH (BEGV, BEGV_BYTE); |
b9145dbb RS |
1880 | immediate_quit = 0; |
1881 | return Qnil; | |
1882 | } | |
b3cfe0c8 | 1883 | |
6a140a74 | 1884 | DEC_BOTH (from, from_byte); |
f902a008 | 1885 | /* char_quoted does UPDATE_SYNTAX_TABLE_BACKWARD (from). */ |
6a140a74 | 1886 | quoted = char_quoted (from, from_byte); |
b3cfe0c8 | 1887 | if (quoted) |
195d1361 | 1888 | { |
6a140a74 RS |
1889 | DEC_BOTH (from, from_byte); |
1890 | goto leave; | |
195d1361 | 1891 | } |
6a140a74 | 1892 | c = FETCH_CHAR (from_byte); |
b3cfe0c8 RS |
1893 | code = SYNTAX (c); |
1894 | comstyle = 0; | |
95ff8dfc | 1895 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
1896 | if (code == Sendcomment) |
1897 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
f902a008 | 1898 | comstart_second = SYNTAX_COMSTART_SECOND (c); |
b3cfe0c8 | 1899 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
f902a008 | 1900 | && prev_char_comend_first (from, from_byte) |
89c6809a | 1901 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
b3cfe0c8 | 1902 | { |
7fc8191e | 1903 | /* We must record the comment style encountered so that |
b3cfe0c8 | 1904 | later, we can match only the proper comment begin |
7fc8191e | 1905 | sequence of the same style. */ |
6a140a74 | 1906 | DEC_BOTH (from, from_byte); |
f902a008 RS |
1907 | code = Sendcomment; |
1908 | /* Calling char_quoted, above, set up global syntax position | |
1909 | at the new value of FROM. */ | |
95ff8dfc RS |
1910 | c1 = FETCH_CHAR (from_byte); |
1911 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
1912 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
b3cfe0c8 | 1913 | } |
f902a008 RS |
1914 | if (from > stop && comstart_second |
1915 | && prev_char_comstart_first (from, from_byte) | |
89c6809a | 1916 | && !char_quoted (from - 1, dec_bytepos (from_byte))) |
ae03af34 | 1917 | { |
ae03af34 | 1918 | code = Scomment; |
6a140a74 | 1919 | DEC_BOTH (from, from_byte); |
ae03af34 | 1920 | } |
b3cfe0c8 | 1921 | |
195d1361 RS |
1922 | if (code == Scomment_fence) |
1923 | { | |
1924 | /* Skip until first preceding unquoted comment_fence. */ | |
6a140a74 | 1925 | int found = 0, ini = from, ini_byte = from_byte; |
195d1361 | 1926 | |
6a140a74 | 1927 | while (1) |
195d1361 | 1928 | { |
6a140a74 RS |
1929 | DEC_BOTH (from, from_byte); |
1930 | if (from == stop) | |
1931 | break; | |
195d1361 | 1932 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 RS |
1933 | c = FETCH_CHAR (from_byte); |
1934 | if (SYNTAX (c) == Scomment_fence | |
1935 | && !char_quoted (from, from_byte)) | |
195d1361 RS |
1936 | { |
1937 | found = 1; | |
1938 | break; | |
1939 | } | |
1940 | } | |
1941 | if (found == 0) | |
1942 | { | |
1943 | from = ini; /* Set point to ini + 1. */ | |
6a140a74 | 1944 | from_byte = ini_byte; |
195d1361 RS |
1945 | goto leave; |
1946 | } | |
1947 | } | |
1948 | else if (code == Sendcomment) | |
b3cfe0c8 | 1949 | { |
95ff8dfc | 1950 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 1951 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
1952 | if (found == -1) |
1953 | { | |
2b927d02 SM |
1954 | #if 0 /* cc-mode (and maybe others) relies on the bogus behavior. */ |
1955 | /* Failure: we should go back to the end of this | |
1aa963c8 SM |
1956 | not-quite-endcomment. */ |
1957 | if (SYNTAX(c) != code) | |
1958 | /* It was a two-char Sendcomment. */ | |
1959 | INC_BOTH (from, from_byte); | |
1960 | goto leave; | |
2b927d02 | 1961 | #endif |
1aa963c8 | 1962 | } |
2b927d02 SM |
1963 | else |
1964 | /* We have skipped one comment. */ | |
1965 | from = out_charpos, from_byte = out_bytepos; | |
1966 | break; | |
b3cfe0c8 | 1967 | } |
195d1361 | 1968 | else if (code != Swhitespace && code != Scomment) |
b3cfe0c8 | 1969 | { |
195d1361 | 1970 | leave: |
b3cfe0c8 | 1971 | immediate_quit = 0; |
6a140a74 | 1972 | INC_BOTH (from, from_byte); |
ef316cf0 | 1973 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
1974 | return Qnil; |
1975 | } | |
1976 | } | |
1977 | ||
840f481c | 1978 | count1++; |
b3cfe0c8 RS |
1979 | } |
1980 | ||
ef316cf0 | 1981 | SET_PT_BOTH (from, from_byte); |
b3cfe0c8 RS |
1982 | immediate_quit = 0; |
1983 | return Qt; | |
1984 | } | |
1985 | \f | |
bd25db08 KH |
1986 | /* Return syntax code of character C if C is a single byte character |
1987 | or `multibyte_symbol_p' is zero. Otherwise, retrun Ssymbol. */ | |
1988 | ||
1989 | #define SYNTAX_WITH_MULTIBYTE_CHECK(c) \ | |
1990 | ((SINGLE_BYTE_CHAR_P (c) || !multibyte_symbol_p) \ | |
1991 | ? SYNTAX (c) : Ssymbol) | |
1992 | ||
6a140a74 | 1993 | static Lisp_Object |
8489eb67 RS |
1994 | scan_lists (from, count, depth, sexpflag) |
1995 | register int from; | |
1996 | int count, depth, sexpflag; | |
1997 | { | |
1998 | Lisp_Object val; | |
195d1361 | 1999 | register int stop = count > 0 ? ZV : BEGV; |
93da5fff KH |
2000 | register int c, c1; |
2001 | int stringterm; | |
8489eb67 RS |
2002 | int quoted; |
2003 | int mathexit = 0; | |
93da5fff | 2004 | register enum syntaxcode code, temp_code; |
195d1361 | 2005 | int min_depth = depth; /* Err out if depth gets less than this. */ |
e5d4f4dc | 2006 | int comstyle = 0; /* style of comment encountered */ |
95ff8dfc | 2007 | int comnested = 0; /* whether the comment is nestable or not */ |
93da5fff | 2008 | int temp_pos; |
7bf5e9e4 | 2009 | int last_good = from; |
195d1361 | 2010 | int found; |
c3907a7e | 2011 | int from_byte; |
6a140a74 | 2012 | int out_bytepos, out_charpos; |
95ff8dfc | 2013 | int temp, dummy; |
bd25db08 | 2014 | int multibyte_symbol_p = sexpflag && multibyte_syntax_as_symbol; |
8489eb67 RS |
2015 | |
2016 | if (depth > 0) min_depth = 0; | |
2017 | ||
c3907a7e RS |
2018 | if (from > ZV) from = ZV; |
2019 | if (from < BEGV) from = BEGV; | |
2020 | ||
2021 | from_byte = CHAR_TO_BYTE (from); | |
2022 | ||
8489eb67 RS |
2023 | immediate_quit = 1; |
2024 | QUIT; | |
2025 | ||
195d1361 | 2026 | SETUP_SYNTAX_TABLE (from, count); |
8489eb67 RS |
2027 | while (count > 0) |
2028 | { | |
8489eb67 RS |
2029 | while (from < stop) |
2030 | { | |
f902a008 | 2031 | int comstart_first, prefix; |
195d1361 | 2032 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
6a140a74 | 2033 | c = FETCH_CHAR (from_byte); |
bd25db08 | 2034 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
f902a008 | 2035 | comstart_first = SYNTAX_COMSTART_FIRST (c); |
95ff8dfc | 2036 | comnested = SYNTAX_COMMENT_NESTED (c); |
e6365855 | 2037 | comstyle = SYNTAX_COMMENT_STYLE (c); |
f902a008 | 2038 | prefix = SYNTAX_PREFIX (c); |
7bf5e9e4 RS |
2039 | if (depth == min_depth) |
2040 | last_good = from; | |
6a140a74 | 2041 | INC_BOTH (from, from_byte); |
195d1361 | 2042 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
f902a008 | 2043 | if (from < stop && comstart_first |
6a140a74 | 2044 | && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from_byte)) |
8489eb67 | 2045 | && parse_sexp_ignore_comments) |
e5d4f4dc RS |
2046 | { |
2047 | /* we have encountered a comment start sequence and we | |
195d1361 | 2048 | are ignoring all text inside comments. We must record |
e5d4f4dc RS |
2049 | the comment style this sequence begins so that later, |
2050 | only a comment end of the same style actually ends | |
2051 | the comment section */ | |
2052 | code = Scomment; | |
95ff8dfc RS |
2053 | c1 = FETCH_CHAR (from_byte); |
2054 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
2055 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
6a140a74 | 2056 | INC_BOTH (from, from_byte); |
f902a008 | 2057 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
e5d4f4dc RS |
2058 | } |
2059 | ||
f902a008 | 2060 | if (prefix) |
8489eb67 RS |
2061 | continue; |
2062 | ||
0220c518 | 2063 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2064 | { |
2065 | case Sescape: | |
2066 | case Scharquote: | |
2067 | if (from == stop) goto lose; | |
6a140a74 | 2068 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2069 | /* treat following character as a word constituent */ |
2070 | case Sword: | |
2071 | case Ssymbol: | |
2072 | if (depth || !sexpflag) break; | |
195d1361 | 2073 | /* This word counts as a sexp; return at end of it. */ |
8489eb67 RS |
2074 | while (from < stop) |
2075 | { | |
195d1361 | 2076 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
7c7ca3d2 RS |
2077 | |
2078 | /* Some compilers can't handle this inside the switch. */ | |
bd25db08 KH |
2079 | c = FETCH_CHAR (from_byte); |
2080 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); | |
7c7ca3d2 | 2081 | switch (temp) |
8489eb67 RS |
2082 | { |
2083 | case Scharquote: | |
2084 | case Sescape: | |
6a140a74 | 2085 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2086 | if (from == stop) goto lose; |
2087 | break; | |
2088 | case Sword: | |
2089 | case Ssymbol: | |
2090 | case Squote: | |
2091 | break; | |
2092 | default: | |
2093 | goto done; | |
2094 | } | |
6a140a74 | 2095 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2096 | } |
2097 | goto done; | |
2098 | ||
195d1361 | 2099 | case Scomment_fence: |
95ff8dfc RS |
2100 | comstyle = ST_COMMENT_STYLE; |
2101 | /* FALLTHROUGH */ | |
2102 | case Scomment: | |
8489eb67 | 2103 | if (!parse_sexp_ignore_comments) break; |
95ff8dfc RS |
2104 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
2105 | found = forw_comment (from, from_byte, stop, | |
2106 | comnested, comstyle, 0, | |
2107 | &out_charpos, &out_bytepos, &dummy); | |
2108 | from = out_charpos, from_byte = out_bytepos; | |
2109 | if (!found) | |
8489eb67 | 2110 | { |
95ff8dfc RS |
2111 | if (depth == 0) |
2112 | goto done; | |
2113 | goto lose; | |
8489eb67 | 2114 | } |
95ff8dfc RS |
2115 | INC_BOTH (from, from_byte); |
2116 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
8489eb67 RS |
2117 | break; |
2118 | ||
2119 | case Smath: | |
2120 | if (!sexpflag) | |
2121 | break; | |
6a140a74 RS |
2122 | if (from != stop && c == FETCH_CHAR (from_byte)) |
2123 | { | |
2124 | INC_BOTH (from, from_byte); | |
2125 | } | |
8489eb67 RS |
2126 | if (mathexit) |
2127 | { | |
2128 | mathexit = 0; | |
2129 | goto close1; | |
2130 | } | |
2131 | mathexit = 1; | |
2132 | ||
2133 | case Sopen: | |
2134 | if (!++depth) goto done; | |
2135 | break; | |
2136 | ||
2137 | case Sclose: | |
2138 | close1: | |
2139 | if (!--depth) goto done; | |
2140 | if (depth < min_depth) | |
7bf5e9e4 RS |
2141 | Fsignal (Qscan_error, |
2142 | Fcons (build_string ("Containing expression ends prematurely"), | |
2143 | Fcons (make_number (last_good), | |
2144 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2145 | break; |
2146 | ||
2147 | case Sstring: | |
195d1361 | 2148 | case Sstring_fence: |
ef316cf0 | 2149 | temp_pos = dec_bytepos (from_byte); |
93da5fff | 2150 | stringterm = FETCH_CHAR (temp_pos); |
8489eb67 RS |
2151 | while (1) |
2152 | { | |
2153 | if (from >= stop) goto lose; | |
195d1361 | 2154 | UPDATE_SYNTAX_TABLE_FORWARD (from); |
bd25db08 | 2155 | c = FETCH_CHAR (from_byte); |
195d1361 | 2156 | if (code == Sstring |
bd25db08 KH |
2157 | ? c == stringterm |
2158 | : SYNTAX_WITH_MULTIBYTE_CHECK (c) == Sstring_fence) | |
195d1361 | 2159 | break; |
7c7ca3d2 RS |
2160 | |
2161 | /* Some compilers can't handle this inside the switch. */ | |
bd25db08 | 2162 | temp = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7c7ca3d2 | 2163 | switch (temp) |
8489eb67 RS |
2164 | { |
2165 | case Scharquote: | |
2166 | case Sescape: | |
6a140a74 | 2167 | INC_BOTH (from, from_byte); |
8489eb67 | 2168 | } |
6a140a74 | 2169 | INC_BOTH (from, from_byte); |
8489eb67 | 2170 | } |
6a140a74 | 2171 | INC_BOTH (from, from_byte); |
8489eb67 RS |
2172 | if (!depth && sexpflag) goto done; |
2173 | break; | |
2174 | } | |
2175 | } | |
2176 | ||
2177 | /* Reached end of buffer. Error if within object, return nil if between */ | |
2178 | if (depth) goto lose; | |
2179 | ||
2180 | immediate_quit = 0; | |
2181 | return Qnil; | |
2182 | ||
2183 | /* End of object reached */ | |
2184 | done: | |
2185 | count--; | |
2186 | } | |
2187 | ||
2188 | while (count < 0) | |
2189 | { | |
8489eb67 RS |
2190 | while (from > stop) |
2191 | { | |
6a140a74 | 2192 | DEC_BOTH (from, from_byte); |
195d1361 | 2193 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
6a140a74 | 2194 | c = FETCH_CHAR (from_byte); |
bd25db08 | 2195 | code = SYNTAX_WITH_MULTIBYTE_CHECK (c); |
7bf5e9e4 RS |
2196 | if (depth == min_depth) |
2197 | last_good = from; | |
7fc8191e | 2198 | comstyle = 0; |
95ff8dfc | 2199 | comnested = SYNTAX_COMMENT_NESTED (c); |
7fc8191e RS |
2200 | if (code == Sendcomment) |
2201 | comstyle = SYNTAX_COMMENT_STYLE (c); | |
8489eb67 | 2202 | if (from > stop && SYNTAX_COMEND_SECOND (c) |
1674d9a2 | 2203 | && prev_char_comend_first (from, from_byte) |
8489eb67 | 2204 | && parse_sexp_ignore_comments) |
e5d4f4dc | 2205 | { |
f902a008 | 2206 | /* We must record the comment style encountered so that |
e5d4f4dc | 2207 | later, we can match only the proper comment begin |
f902a008 | 2208 | sequence of the same style. */ |
6a140a74 | 2209 | DEC_BOTH (from, from_byte); |
f902a008 RS |
2210 | UPDATE_SYNTAX_TABLE_BACKWARD (from); |
2211 | code = Sendcomment; | |
95ff8dfc RS |
2212 | c1 = FETCH_CHAR (from_byte); |
2213 | comstyle = SYNTAX_COMMENT_STYLE (c1); | |
2214 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
e5d4f4dc RS |
2215 | } |
2216 | ||
9828a477 | 2217 | /* Quoting turns anything except a comment-ender |
e6365855 | 2218 | into a word character. Note that this cannot be true |
f902a008 | 2219 | if we decremented FROM in the if-statement above. */ |
9828a477 KH |
2220 | if (code != Sendcomment && char_quoted (from, from_byte)) |
2221 | code = Sword; | |
2222 | else if (SYNTAX_PREFIX (c)) | |
8489eb67 RS |
2223 | continue; |
2224 | ||
9828a477 | 2225 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2226 | { |
2227 | case Sword: | |
2228 | case Ssymbol: | |
9828a477 KH |
2229 | case Sescape: |
2230 | case Scharquote: | |
8489eb67 | 2231 | if (depth || !sexpflag) break; |
195d1361 RS |
2232 | /* This word counts as a sexp; count object finished |
2233 | after passing it. */ | |
8489eb67 RS |
2234 | while (from > stop) |
2235 | { | |
6a140a74 | 2236 | temp_pos = from_byte; |
ef316cf0 RS |
2237 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2238 | DEC_POS (temp_pos); | |
2239 | else | |
2240 | temp_pos--; | |
6a140a74 | 2241 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
9828a477 | 2242 | c1 = FETCH_CHAR (temp_pos); |
bd25db08 | 2243 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
9828a477 KH |
2244 | /* Don't allow comment-end to be quoted. */ |
2245 | if (temp_code == Sendcomment) | |
2246 | goto done2; | |
6a140a74 | 2247 | quoted = char_quoted (from - 1, temp_pos); |
8489eb67 | 2248 | if (quoted) |
93da5fff | 2249 | { |
6a140a74 | 2250 | DEC_BOTH (from, from_byte); |
ef316cf0 | 2251 | temp_pos = dec_bytepos (temp_pos); |
6a140a74 | 2252 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff KH |
2253 | } |
2254 | c1 = FETCH_CHAR (temp_pos); | |
bd25db08 | 2255 | temp_code = SYNTAX_WITH_MULTIBYTE_CHECK (c1); |
93da5fff KH |
2256 | if (! (quoted || temp_code == Sword |
2257 | || temp_code == Ssymbol | |
2258 | || temp_code == Squote)) | |
8489eb67 | 2259 | goto done2; |
6a140a74 | 2260 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2261 | } |
2262 | goto done2; | |
2263 | ||
2264 | case Smath: | |
2265 | if (!sexpflag) | |
2266 | break; | |
ef316cf0 | 2267 | temp_pos = dec_bytepos (from_byte); |
6a140a74 | 2268 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
93da5fff | 2269 | if (from != stop && c == FETCH_CHAR (temp_pos)) |
6a140a74 | 2270 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2271 | if (mathexit) |
2272 | { | |
2273 | mathexit = 0; | |
2274 | goto open2; | |
2275 | } | |
2276 | mathexit = 1; | |
2277 | ||
2278 | case Sclose: | |
2279 | if (!++depth) goto done2; | |
2280 | break; | |
2281 | ||
2282 | case Sopen: | |
2283 | open2: | |
2284 | if (!--depth) goto done2; | |
2285 | if (depth < min_depth) | |
7bf5e9e4 RS |
2286 | Fsignal (Qscan_error, |
2287 | Fcons (build_string ("Containing expression ends prematurely"), | |
2288 | Fcons (make_number (last_good), | |
2289 | Fcons (make_number (from), Qnil)))); | |
8489eb67 RS |
2290 | break; |
2291 | ||
2292 | case Sendcomment: | |
2293 | if (!parse_sexp_ignore_comments) | |
2294 | break; | |
95ff8dfc | 2295 | found = back_comment (from, from_byte, stop, comnested, comstyle, |
6a140a74 | 2296 | &out_charpos, &out_bytepos); |
1aa963c8 SM |
2297 | /* FIXME: if found == -1, then it really wasn't a comment-end. |
2298 | For single-char Sendcomment, we can't do much about it apart | |
2299 | from skipping the char. | |
2300 | For 2-char endcomments, we could try again, taking both | |
2301 | chars as separate entities, but it's a lot of trouble | |
2302 | for very little gain, so we don't bother either. -sm */ | |
6a140a74 RS |
2303 | if (found != -1) |
2304 | from = out_charpos, from_byte = out_bytepos; | |
8489eb67 RS |
2305 | break; |
2306 | ||
195d1361 RS |
2307 | case Scomment_fence: |
2308 | case Sstring_fence: | |
2309 | while (1) | |
2310 | { | |
6a140a74 | 2311 | DEC_BOTH (from, from_byte); |
195d1361 RS |
2312 | if (from == stop) goto lose; |
2313 | UPDATE_SYNTAX_TABLE_BACKWARD (from); | |
6a140a74 | 2314 | if (!char_quoted (from, from_byte) |
bd25db08 KH |
2315 | && (c = FETCH_CHAR (from_byte), |
2316 | SYNTAX_WITH_MULTIBYTE_CHECK (c) == code)) | |
195d1361 RS |
2317 | break; |
2318 | } | |
2319 | if (code == Sstring_fence && !depth && sexpflag) goto done2; | |
2320 | break; | |
2321 | ||
8489eb67 | 2322 | case Sstring: |
6a140a74 | 2323 | stringterm = FETCH_CHAR (from_byte); |
8489eb67 RS |
2324 | while (1) |
2325 | { | |
2326 | if (from == stop) goto lose; | |
6a140a74 | 2327 | temp_pos = from_byte; |
ef316cf0 RS |
2328 | if (! NILP (current_buffer->enable_multibyte_characters)) |
2329 | DEC_POS (temp_pos); | |
2330 | else | |
2331 | temp_pos--; | |
6a140a74 RS |
2332 | UPDATE_SYNTAX_TABLE_BACKWARD (from - 1); |
2333 | if (!char_quoted (from - 1, temp_pos) | |
93da5fff | 2334 | && stringterm == FETCH_CHAR (temp_pos)) |
8489eb67 | 2335 | break; |
6a140a74 | 2336 | DEC_BOTH (from, from_byte); |
8489eb67 | 2337 | } |
6a140a74 | 2338 | DEC_BOTH (from, from_byte); |
8489eb67 RS |
2339 | if (!depth && sexpflag) goto done2; |
2340 | break; | |
2341 | } | |
2342 | } | |
2343 | ||
2344 | /* Reached start of buffer. Error if within object, return nil if between */ | |
2345 | if (depth) goto lose; | |
2346 | ||
2347 | immediate_quit = 0; | |
2348 | return Qnil; | |
2349 | ||
2350 | done2: | |
2351 | count++; | |
2352 | } | |
2353 | ||
2354 | ||
2355 | immediate_quit = 0; | |
1e142fb7 | 2356 | XSETFASTINT (val, from); |
8489eb67 RS |
2357 | return val; |
2358 | ||
2359 | lose: | |
7bf5e9e4 RS |
2360 | Fsignal (Qscan_error, |
2361 | Fcons (build_string ("Unbalanced parentheses"), | |
2362 | Fcons (make_number (last_good), | |
2363 | Fcons (make_number (from), Qnil)))); | |
2364 | ||
8489eb67 RS |
2365 | /* NOTREACHED */ |
2366 | } | |
2367 | ||
8489eb67 RS |
2368 | DEFUN ("scan-lists", Fscan_lists, Sscan_lists, 3, 3, 0, |
2369 | "Scan from character number FROM by COUNT lists.\n\ | |
2370 | Returns the character number of the position thus found.\n\ | |
2371 | \n\ | |
2372 | If DEPTH is nonzero, paren depth begins counting from that value,\n\ | |
2373 | only places where the depth in parentheses becomes zero\n\ | |
2374 | are candidates for stopping; COUNT such places are counted.\n\ | |
2375 | Thus, a positive value for DEPTH means go out levels.\n\ | |
2376 | \n\ | |
2377 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
2378 | \n\ | |
2379 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
2380 | and the depth is wrong, an error is signaled.\n\ | |
2381 | If the depth is right but the count is not used up, nil is returned.") | |
2382 | (from, count, depth) | |
2383 | Lisp_Object from, count, depth; | |
2384 | { | |
2385 | CHECK_NUMBER (from, 0); | |
2386 | CHECK_NUMBER (count, 1); | |
2387 | CHECK_NUMBER (depth, 2); | |
2388 | ||
2389 | return scan_lists (XINT (from), XINT (count), XINT (depth), 0); | |
2390 | } | |
2391 | ||
2392 | DEFUN ("scan-sexps", Fscan_sexps, Sscan_sexps, 2, 2, 0, | |
2393 | "Scan from character number FROM by COUNT balanced expressions.\n\ | |
2394 | If COUNT is negative, scan backwards.\n\ | |
2395 | Returns the character number of the position thus found.\n\ | |
2396 | \n\ | |
2397 | Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\ | |
2398 | \n\ | |
2399 | If the beginning or end of (the accessible part of) the buffer is reached\n\ | |
2400 | in the middle of a parenthetical grouping, an error is signaled.\n\ | |
2401 | If the beginning or end is reached between groupings\n\ | |
2402 | but before count is used up, nil is returned.") | |
2403 | (from, count) | |
2404 | Lisp_Object from, count; | |
2405 | { | |
2406 | CHECK_NUMBER (from, 0); | |
2407 | CHECK_NUMBER (count, 1); | |
2408 | ||
2409 | return scan_lists (XINT (from), XINT (count), 0, 1); | |
2410 | } | |
2411 | ||
2412 | DEFUN ("backward-prefix-chars", Fbackward_prefix_chars, Sbackward_prefix_chars, | |
2413 | 0, 0, 0, | |
2414 | "Move point backward over any number of chars with prefix syntax.\n\ | |
2415 | This includes chars with \"quote\" or \"prefix\" syntax (' or p).") | |
2416 | () | |
2417 | { | |
2418 | int beg = BEGV; | |
6a140a74 RS |
2419 | int opoint = PT; |
2420 | int opoint_byte = PT_BYTE; | |
6ec8bbd2 | 2421 | int pos = PT; |
6a140a74 | 2422 | int pos_byte = PT_BYTE; |
93da5fff | 2423 | int c; |
93da5fff | 2424 | |
f902a008 | 2425 | if (pos <= beg) |
195d1361 | 2426 | { |
f902a008 RS |
2427 | SET_PT_BOTH (opoint, opoint_byte); |
2428 | ||
2429 | return Qnil; | |
195d1361 | 2430 | } |
8489eb67 | 2431 | |
f902a008 RS |
2432 | SETUP_SYNTAX_TABLE (pos, -1); |
2433 | ||
6a140a74 RS |
2434 | DEC_BOTH (pos, pos_byte); |
2435 | ||
1fd3172d | 2436 | while (!char_quoted (pos, pos_byte) |
195d1361 | 2437 | /* Previous statement updates syntax table. */ |
6a140a74 | 2438 | && ((c = FETCH_CHAR (pos_byte), SYNTAX (c) == Squote) |
93da5fff KH |
2439 | || SYNTAX_PREFIX (c))) |
2440 | { | |
1fd3172d RS |
2441 | opoint = pos; |
2442 | opoint_byte = pos_byte; | |
2443 | ||
2444 | if (pos + 1 > beg) | |
2445 | DEC_BOTH (pos, pos_byte); | |
93da5fff | 2446 | } |
8489eb67 | 2447 | |
6a140a74 | 2448 | SET_PT_BOTH (opoint, opoint_byte); |
8489eb67 RS |
2449 | |
2450 | return Qnil; | |
2451 | } | |
2452 | \f | |
6a140a74 | 2453 | /* Parse forward from FROM / FROM_BYTE to END, |
e5d4f4dc RS |
2454 | assuming that FROM has state OLDSTATE (nil means FROM is start of function), |
2455 | and return a description of the state of the parse at END. | |
c81a3712 | 2456 | If STOPBEFORE is nonzero, stop at the start of an atom. |
644ea4df RS |
2457 | If COMMENTSTOP is 1, stop at the start of a comment. |
2458 | If COMMENTSTOP is -1, stop at the start or end of a comment, | |
2459 | after the beginning of a string, or after the end of a string. */ | |
8489eb67 | 2460 | |
340f92b5 | 2461 | static void |
6a140a74 | 2462 | scan_sexps_forward (stateptr, from, from_byte, end, targetdepth, |
c81a3712 | 2463 | stopbefore, oldstate, commentstop) |
e5d4f4dc | 2464 | struct lisp_parse_state *stateptr; |
8489eb67 RS |
2465 | register int from; |
2466 | int end, targetdepth, stopbefore; | |
2467 | Lisp_Object oldstate; | |
c81a3712 | 2468 | int commentstop; |
8489eb67 RS |
2469 | { |
2470 | struct lisp_parse_state state; | |
2471 | ||
2472 | register enum syntaxcode code; | |
95ff8dfc RS |
2473 | int c1; |
2474 | int comnested; | |
8489eb67 RS |
2475 | struct level { int last, prev; }; |
2476 | struct level levelstart[100]; | |
2477 | register struct level *curlevel = levelstart; | |
2478 | struct level *endlevel = levelstart + 100; | |
8489eb67 RS |
2479 | register int depth; /* Paren depth of current scanning location. |
2480 | level - levelstart equals this except | |
2481 | when the depth becomes negative. */ | |
2482 | int mindepth; /* Lowest DEPTH value seen. */ | |
2483 | int start_quoted = 0; /* Nonzero means starting after a char quote */ | |
2484 | Lisp_Object tem; | |
93da5fff | 2485 | int prev_from; /* Keep one character before FROM. */ |
6a140a74 | 2486 | int prev_from_byte; |
1fd3172d | 2487 | int prev_from_syntax; |
195d1361 RS |
2488 | int boundary_stop = commentstop == -1; |
2489 | int nofence; | |
95ff8dfc RS |
2490 | int found; |
2491 | int out_bytepos, out_charpos; | |
7c7ca3d2 | 2492 | int temp; |
93da5fff KH |
2493 | |
2494 | prev_from = from; | |
6a140a74 RS |
2495 | prev_from_byte = from_byte; |
2496 | if (from != BEGV) | |
2497 | DEC_BOTH (prev_from, prev_from_byte); | |
93da5fff KH |
2498 | |
2499 | /* Use this macro instead of `from++'. */ | |
6a140a74 RS |
2500 | #define INC_FROM \ |
2501 | do { prev_from = from; \ | |
2502 | prev_from_byte = from_byte; \ | |
1fd3172d RS |
2503 | prev_from_syntax \ |
2504 | = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); \ | |
ef316cf0 | 2505 | INC_BOTH (from, from_byte); \ |
1fd3172d | 2506 | UPDATE_SYNTAX_TABLE_FORWARD (from); \ |
6a140a74 | 2507 | } while (0) |
8489eb67 RS |
2508 | |
2509 | immediate_quit = 1; | |
2510 | QUIT; | |
2511 | ||
265a9e55 | 2512 | if (NILP (oldstate)) |
8489eb67 RS |
2513 | { |
2514 | depth = 0; | |
2515 | state.instring = -1; | |
2516 | state.incomment = 0; | |
195d1361 RS |
2517 | state.comstyle = 0; /* comment style a by default. */ |
2518 | state.comstr_start = -1; /* no comment/string seen. */ | |
8489eb67 RS |
2519 | } |
2520 | else | |
2521 | { | |
2522 | tem = Fcar (oldstate); | |
265a9e55 | 2523 | if (!NILP (tem)) |
8489eb67 RS |
2524 | depth = XINT (tem); |
2525 | else | |
2526 | depth = 0; | |
2527 | ||
2528 | oldstate = Fcdr (oldstate); | |
2529 | oldstate = Fcdr (oldstate); | |
2530 | oldstate = Fcdr (oldstate); | |
2531 | tem = Fcar (oldstate); | |
195d1361 | 2532 | /* Check whether we are inside string_fence-style string: */ |
e76f1c44 GM |
2533 | state.instring = (!NILP (tem) |
2534 | ? (INTEGERP (tem) ? XINT (tem) : ST_STRING_STYLE) | |
2535 | : -1); | |
8489eb67 RS |
2536 | |
2537 | oldstate = Fcdr (oldstate); | |
2538 | tem = Fcar (oldstate); | |
e76f1c44 GM |
2539 | state.incomment = (!NILP (tem) |
2540 | ? (INTEGERP (tem) ? XINT (tem) : -1) | |
95ff8dfc | 2541 | : 0); |
8489eb67 RS |
2542 | |
2543 | oldstate = Fcdr (oldstate); | |
2544 | tem = Fcar (oldstate); | |
265a9e55 | 2545 | start_quoted = !NILP (tem); |
e5d4f4dc | 2546 | |
95ff8dfc | 2547 | /* if the eighth element of the list is nil, we are in comment |
195d1361 RS |
2548 | style a. If it is non-nil, we are in comment style b */ |
2549 | oldstate = Fcdr (oldstate); | |
e5d4f4dc | 2550 | oldstate = Fcdr (oldstate); |
195d1361 | 2551 | tem = Fcar (oldstate); |
e76f1c44 GM |
2552 | state.comstyle = NILP (tem) ? 0 : (EQ (tem, Qsyntax_table) |
2553 | ? ST_COMMENT_STYLE : 1); | |
195d1361 | 2554 | |
e5d4f4dc | 2555 | oldstate = Fcdr (oldstate); |
e5d4f4dc | 2556 | tem = Fcar (oldstate); |
195d1361 | 2557 | state.comstr_start = NILP (tem) ? -1 : XINT (tem) ; |
1a102a58 RS |
2558 | oldstate = Fcdr (oldstate); |
2559 | tem = Fcar (oldstate); | |
2560 | while (!NILP (tem)) /* >= second enclosing sexps. */ | |
2561 | { | |
2562 | /* curlevel++->last ran into compiler bug on Apollo */ | |
2563 | curlevel->last = XINT (Fcar (tem)); | |
2564 | if (++curlevel == endlevel) | |
02010917 | 2565 | curlevel--; /* error ("Nesting too deep for parser"); */ |
1a102a58 RS |
2566 | curlevel->prev = -1; |
2567 | curlevel->last = -1; | |
2568 | tem = Fcdr (tem); | |
2569 | } | |
8489eb67 RS |
2570 | } |
2571 | state.quoted = 0; | |
2572 | mindepth = depth; | |
2573 | ||
2574 | curlevel->prev = -1; | |
2575 | curlevel->last = -1; | |
2576 | ||
326b283b RS |
2577 | SETUP_SYNTAX_TABLE (prev_from, 1); |
2578 | prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); | |
2579 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
2580 | ||
195d1361 | 2581 | /* Enter the loop at a place appropriate for initial state. */ |
8489eb67 | 2582 | |
326b283b RS |
2583 | if (state.incomment) |
2584 | goto startincomment; | |
8489eb67 RS |
2585 | if (state.instring >= 0) |
2586 | { | |
195d1361 | 2587 | nofence = state.instring != ST_STRING_STYLE; |
326b283b RS |
2588 | if (start_quoted) |
2589 | goto startquotedinstring; | |
8489eb67 RS |
2590 | goto startinstring; |
2591 | } | |
326b283b RS |
2592 | else if (start_quoted) |
2593 | goto startquoted; | |
1fd3172d | 2594 | |
ccf89641 | 2595 | #if 0 /* This seems to be redundant with the identical code above. */ |
1fd3172d RS |
2596 | SETUP_SYNTAX_TABLE (prev_from, 1); |
2597 | prev_from_syntax = SYNTAX_WITH_FLAGS (FETCH_CHAR (prev_from_byte)); | |
2598 | UPDATE_SYNTAX_TABLE_FORWARD (from); | |
ccf89641 | 2599 | #endif |
1fd3172d | 2600 | |
8489eb67 RS |
2601 | while (from < end) |
2602 | { | |
93da5fff | 2603 | INC_FROM; |
1fd3172d | 2604 | code = prev_from_syntax & 0xff; |
4c920633 | 2605 | |
8f9dc2ed | 2606 | if (code == Scomment) |
95ff8dfc | 2607 | { |
d355bd8a | 2608 | state.comstyle = SYNTAX_FLAGS_COMMENT_STYLE (prev_from_syntax); |
95ff8dfc RS |
2609 | state.incomment = (SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax) ? |
2610 | 1 : -1); | |
2611 | state.comstr_start = prev_from; | |
2612 | } | |
4c920633 | 2613 | else if (code == Scomment_fence) |
e5d4f4dc RS |
2614 | { |
2615 | /* Record the comment style we have entered so that only | |
2616 | the comment-end sequence of the same style actually | |
2617 | terminates the comment section. */ | |
95ff8dfc RS |
2618 | state.comstyle = ST_COMMENT_STYLE; |
2619 | state.incomment = -1; | |
195d1361 | 2620 | state.comstr_start = prev_from; |
e5d4f4dc | 2621 | code = Scomment; |
e5d4f4dc | 2622 | } |
4c920633 | 2623 | else if (from < end) |
1fd3172d | 2624 | if (SYNTAX_FLAGS_COMSTART_FIRST (prev_from_syntax)) |
95ff8dfc RS |
2625 | if (c1 = FETCH_CHAR (from_byte), |
2626 | SYNTAX_COMSTART_SECOND (c1)) | |
1fd3172d | 2627 | /* Duplicate code to avoid a complex if-expression |
4c920633 RS |
2628 | which causes trouble for the SGI compiler. */ |
2629 | { | |
2630 | /* Record the comment style we have entered so that only | |
2631 | the comment-end sequence of the same style actually | |
2632 | terminates the comment section. */ | |
95ff8dfc RS |
2633 | state.comstyle = SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte)); |
2634 | comnested = SYNTAX_FLAGS_COMMENT_NESTED (prev_from_syntax); | |
2635 | comnested = comnested || SYNTAX_COMMENT_NESTED (c1); | |
2636 | state.incomment = comnested ? 1 : -1; | |
4c920633 | 2637 | state.comstr_start = prev_from; |
95ff8dfc | 2638 | INC_FROM; |
4c920633 RS |
2639 | code = Scomment; |
2640 | } | |
e5d4f4dc | 2641 | |
1fd3172d | 2642 | if (SYNTAX_FLAGS_PREFIX (prev_from_syntax)) |
8489eb67 | 2643 | continue; |
0220c518 | 2644 | switch (SWITCH_ENUM_CAST (code)) |
8489eb67 RS |
2645 | { |
2646 | case Sescape: | |
2647 | case Scharquote: | |
2648 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2649 | curlevel->last = prev_from; |
8489eb67 RS |
2650 | startquoted: |
2651 | if (from == end) goto endquoted; | |
93da5fff | 2652 | INC_FROM; |
8489eb67 RS |
2653 | goto symstarted; |
2654 | /* treat following character as a word constituent */ | |
2655 | case Sword: | |
2656 | case Ssymbol: | |
2657 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
93da5fff | 2658 | curlevel->last = prev_from; |
8489eb67 RS |
2659 | symstarted: |
2660 | while (from < end) | |
2661 | { | |
7c7ca3d2 RS |
2662 | /* Some compilers can't handle this inside the switch. */ |
2663 | temp = SYNTAX (FETCH_CHAR (from_byte)); | |
2664 | switch (temp) | |
8489eb67 RS |
2665 | { |
2666 | case Scharquote: | |
2667 | case Sescape: | |
93da5fff | 2668 | INC_FROM; |
8489eb67 RS |
2669 | if (from == end) goto endquoted; |
2670 | break; | |
2671 | case Sword: | |
2672 | case Ssymbol: | |
2673 | case Squote: | |
2674 | break; | |
2675 | default: | |
2676 | goto symdone; | |
2677 | } | |
93da5fff | 2678 | INC_FROM; |
8489eb67 RS |
2679 | } |
2680 | symdone: | |
2681 | curlevel->prev = curlevel->last; | |
2682 | break; | |
2683 | ||
2684 | case Scomment: | |
195d1361 | 2685 | if (commentstop || boundary_stop) goto done; |
d355bd8a SM |
2686 | startincomment: |
2687 | /* The (from == BEGV) test was to enter the loop in the middle so | |
95ff8dfc | 2688 | that we find a 2-char comment ender even if we start in the |
e6365855 | 2689 | middle of it. We don't want to do that if we're just at the |
d355bd8a | 2690 | beginning of the comment (think of (*) ... (*)). */ |
95ff8dfc RS |
2691 | found = forw_comment (from, from_byte, end, |
2692 | state.incomment, state.comstyle, | |
e6365855 SM |
2693 | (from == BEGV || from < state.comstr_start + 3) |
2694 | ? 0 : prev_from_syntax, | |
95ff8dfc RS |
2695 | &out_charpos, &out_bytepos, &state.incomment); |
2696 | from = out_charpos; from_byte = out_bytepos; | |
2697 | /* Beware! prev_from and friends are invalid now. | |
2698 | Luckily, the `done' doesn't use them and the INC_FROM | |
2699 | sets them to a sane value without looking at them. */ | |
2700 | if (!found) goto done; | |
d355bd8a | 2701 | INC_FROM; |
8489eb67 | 2702 | state.incomment = 0; |
e5d4f4dc | 2703 | state.comstyle = 0; /* reset the comment style */ |
195d1361 | 2704 | if (boundary_stop) goto done; |
8489eb67 RS |
2705 | break; |
2706 | ||
2707 | case Sopen: | |
2708 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ | |
2709 | depth++; | |
2710 | /* curlevel++->last ran into compiler bug on Apollo */ | |
93da5fff | 2711 | curlevel->last = prev_from; |
8489eb67 | 2712 | if (++curlevel == endlevel) |
02010917 | 2713 | curlevel--; /* error ("Nesting too deep for parser"); */ |
8489eb67 RS |
2714 | curlevel->prev = -1; |
2715 | curlevel->last = -1; | |
30844415 | 2716 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2717 | break; |
2718 | ||
2719 | case Sclose: | |
2720 | depth--; | |
2721 | if (depth < mindepth) | |
2722 | mindepth = depth; | |
2723 | if (curlevel != levelstart) | |
2724 | curlevel--; | |
2725 | curlevel->prev = curlevel->last; | |
30844415 | 2726 | if (targetdepth == depth) goto done; |
8489eb67 RS |
2727 | break; |
2728 | ||
2729 | case Sstring: | |
195d1361 RS |
2730 | case Sstring_fence: |
2731 | state.comstr_start = from - 1; | |
8489eb67 | 2732 | if (stopbefore) goto stop; /* this arg means stop at sexp start */ |
93da5fff | 2733 | curlevel->last = prev_from; |
195d1361 | 2734 | state.instring = (code == Sstring |
6a140a74 | 2735 | ? (FETCH_CHAR (prev_from_byte)) |
195d1361 RS |
2736 | : ST_STRING_STYLE); |
2737 | if (boundary_stop) goto done; | |
8489eb67 | 2738 | startinstring: |
195d1361 | 2739 | { |
644ea4df | 2740 | nofence = state.instring != ST_STRING_STYLE; |
195d1361 | 2741 | |
644ea4df RS |
2742 | while (1) |
2743 | { | |
2744 | int c; | |
195d1361 | 2745 | |
644ea4df | 2746 | if (from >= end) goto done; |
6a140a74 | 2747 | c = FETCH_CHAR (from_byte); |
7c7ca3d2 RS |
2748 | /* Some compilers can't handle this inside the switch. */ |
2749 | temp = SYNTAX (c); | |
ccf89641 KH |
2750 | |
2751 | /* Check TEMP here so that if the char has | |
2752 | a syntax-table property which says it is NOT | |
2753 | a string character, it does not end the string. */ | |
2754 | if (nofence && c == state.instring && temp == Sstring) | |
2755 | break; | |
2756 | ||
7c7ca3d2 | 2757 | switch (temp) |
644ea4df RS |
2758 | { |
2759 | case Sstring_fence: | |
2760 | if (!nofence) goto string_end; | |
2761 | break; | |
2762 | case Scharquote: | |
2763 | case Sescape: | |
2764 | INC_FROM; | |
2765 | startquotedinstring: | |
2766 | if (from >= end) goto endquoted; | |
195d1361 | 2767 | } |
644ea4df RS |
2768 | INC_FROM; |
2769 | } | |
195d1361 RS |
2770 | } |
2771 | string_end: | |
8489eb67 RS |
2772 | state.instring = -1; |
2773 | curlevel->prev = curlevel->last; | |
93da5fff | 2774 | INC_FROM; |
195d1361 | 2775 | if (boundary_stop) goto done; |
8489eb67 RS |
2776 | break; |
2777 | ||
2778 | case Smath: | |
2779 | break; | |
2780 | } | |
2781 | } | |
2782 | goto done; | |
2783 | ||
2784 | stop: /* Here if stopping before start of sexp. */ | |
93da5fff | 2785 | from = prev_from; /* We have just fetched the char that starts it; */ |
8489eb67 RS |
2786 | goto done; /* but return the position before it. */ |
2787 | ||
2788 | endquoted: | |
2789 | state.quoted = 1; | |
2790 | done: | |
2791 | state.depth = depth; | |
2792 | state.mindepth = mindepth; | |
2793 | state.thislevelstart = curlevel->prev; | |
2794 | state.prevlevelstart | |
2795 | = (curlevel == levelstart) ? -1 : (curlevel - 1)->last; | |
2796 | state.location = from; | |
1a102a58 RS |
2797 | state.levelstarts = Qnil; |
2798 | while (--curlevel >= levelstart) | |
2799 | state.levelstarts = Fcons (make_number (curlevel->last), | |
2800 | state.levelstarts); | |
8489eb67 RS |
2801 | immediate_quit = 0; |
2802 | ||
e5d4f4dc | 2803 | *stateptr = state; |
8489eb67 RS |
2804 | } |
2805 | ||
2806 | /* This comment supplies the doc string for parse-partial-sexp, | |
2807 | for make-docfile to see. We cannot put this in the real DEFUN | |
2808 | due to limits in the Unix cpp. | |
2809 | ||
c81a3712 | 2810 | DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0, |
8489eb67 RS |
2811 | "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\ |
2812 | Parsing stops at TO or when certain criteria are met;\n\ | |
2813 | point is set to where parsing stops.\n\ | |
2814 | If fifth arg STATE is omitted or nil,\n\ | |
2815 | parsing assumes that FROM is the beginning of a function.\n\ | |
1a102a58 | 2816 | Value is a list of ten elements describing final state of parsing:\n\ |
af50f9e5 RS |
2817 | 0. depth in parens.\n\ |
2818 | 1. character address of start of innermost containing list; nil if none.\n\ | |
2819 | 2. character address of start of last complete sexp terminated.\n\ | |
2820 | 3. non-nil if inside a string.\n\ | |
195d1361 | 2821 | (it is the character that will terminate the string,\n\ |
bff37d2a | 2822 | or t if the string should be terminated by a generic string delimiter.)\n\ |
95ff8dfc RS |
2823 | 4. nil if outside a comment, t if inside a non-nestable comment, \n\ |
2824 | else an integer (the current comment nesting).\n\ | |
af50f9e5 RS |
2825 | 5. t if following a quote character.\n\ |
2826 | 6. the minimum paren-depth encountered during this scan.\n\ | |
943e731c | 2827 | 7. t if in a comment of style b; symbol `syntax-table' if the comment\n\ |
bff37d2a RS |
2828 | should be terminated by a generic comment delimiter.\n\ |
2829 | 8. character address of start of comment or string; nil if not in one.\n\ | |
1a102a58 | 2830 | 9. Intermediate data for continuation of parsing (subject to change).\n\ |
8489eb67 RS |
2831 | If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\ |
2832 | in parentheses becomes equal to TARGETDEPTH.\n\ | |
2833 | Fourth arg STOPBEFORE non-nil means stop when come to\n\ | |
2834 | any character that starts a sexp.\n\ | |
bff37d2a RS |
2835 | Fifth arg STATE is a nine-element list like what this function returns.\n\ |
2836 | It is used to initialize the state of the parse. Elements number 1, 2, 6\n\ | |
2837 | and 8 are ignored; you can leave off element 8 (the last) entirely.\n\ | |
2838 | Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.\n\ | |
943e731c DL |
2839 | If it is symbol `syntax-table', stop after the start of a comment or a\n\ |
2840 | string, or after end of a comment or a string.") | |
c81a3712 | 2841 | (from, to, targetdepth, stopbefore, state, commentstop) |
8489eb67 RS |
2842 | */ |
2843 | ||
c81a3712 | 2844 | DEFUN ("parse-partial-sexp", Fparse_partial_sexp, Sparse_partial_sexp, 2, 6, 0, |
8489eb67 | 2845 | 0 /* See immediately above */) |
c81a3712 RS |
2846 | (from, to, targetdepth, stopbefore, oldstate, commentstop) |
2847 | Lisp_Object from, to, targetdepth, stopbefore, oldstate, commentstop; | |
8489eb67 RS |
2848 | { |
2849 | struct lisp_parse_state state; | |
2850 | int target; | |
2851 | ||
265a9e55 | 2852 | if (!NILP (targetdepth)) |
8489eb67 RS |
2853 | { |
2854 | CHECK_NUMBER (targetdepth, 3); | |
2855 | target = XINT (targetdepth); | |
2856 | } | |
2857 | else | |
2858 | target = -100000; /* We won't reach this depth */ | |
2859 | ||
2860 | validate_region (&from, &to); | |
6a140a74 RS |
2861 | scan_sexps_forward (&state, XINT (from), CHAR_TO_BYTE (XINT (from)), |
2862 | XINT (to), | |
c81a3712 | 2863 | target, !NILP (stopbefore), oldstate, |
195d1361 RS |
2864 | (NILP (commentstop) |
2865 | ? 0 : (EQ (commentstop, Qsyntax_table) ? -1 : 1))); | |
8489eb67 RS |
2866 | |
2867 | SET_PT (state.location); | |
2868 | ||
2869 | return Fcons (make_number (state.depth), | |
2870 | Fcons (state.prevlevelstart < 0 ? Qnil : make_number (state.prevlevelstart), | |
2871 | Fcons (state.thislevelstart < 0 ? Qnil : make_number (state.thislevelstart), | |
195d1361 RS |
2872 | Fcons (state.instring >= 0 |
2873 | ? (state.instring == ST_STRING_STYLE | |
2874 | ? Qt : make_number (state.instring)) : Qnil, | |
95ff8dfc RS |
2875 | Fcons (state.incomment < 0 ? Qt : |
2876 | (state.incomment == 0 ? Qnil : | |
2877 | make_number (state.incomment)), | |
8489eb67 | 2878 | Fcons (state.quoted ? Qt : Qnil, |
bff37d2a RS |
2879 | Fcons (make_number (state.mindepth), |
2880 | Fcons ((state.comstyle | |
2881 | ? (state.comstyle == ST_COMMENT_STYLE | |
2882 | ? Qsyntax_table : Qt) : | |
2883 | Qnil), | |
0beaf54f DL |
2884 | Fcons (((state.incomment |
2885 | || (state.instring >= 0)) | |
bff37d2a RS |
2886 | ? make_number (state.comstr_start) |
2887 | : Qnil), | |
1a102a58 | 2888 | Fcons (state.levelstarts, Qnil)))))))))); |
8489eb67 RS |
2889 | } |
2890 | \f | |
dfcf069d | 2891 | void |
8489eb67 RS |
2892 | init_syntax_once () |
2893 | { | |
78f9a1f7 | 2894 | register int i, c; |
8ea151b2 | 2895 | Lisp_Object temp; |
8489eb67 | 2896 | |
5ebaddf5 RS |
2897 | /* This has to be done here, before we call Fmake_char_table. */ |
2898 | Qsyntax_table = intern ("syntax-table"); | |
2899 | staticpro (&Qsyntax_table); | |
2900 | ||
2901 | /* Intern this now in case it isn't already done. | |
2902 | Setting this variable twice is harmless. | |
2903 | But don't staticpro it here--that is done in alloc.c. */ | |
2904 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
2905 | ||
93da5fff | 2906 | /* Create objects which can be shared among syntax tables. */ |
44d8a793 | 2907 | Vsyntax_code_object = Fmake_vector (make_number (13), Qnil); |
93da5fff KH |
2908 | for (i = 0; i < XVECTOR (Vsyntax_code_object)->size; i++) |
2909 | XVECTOR (Vsyntax_code_object)->contents[i] | |
2910 | = Fcons (make_number (i), Qnil); | |
2911 | ||
5ebaddf5 RS |
2912 | /* Now we are ready to set up this property, so we can |
2913 | create syntax tables. */ | |
2914 | Fput (Qsyntax_table, Qchar_table_extra_slots, make_number (0)); | |
2915 | ||
93da5fff | 2916 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Swhitespace]; |
8489eb67 | 2917 | |
5ebaddf5 | 2918 | Vstandard_syntax_table = Fmake_char_table (Qsyntax_table, temp); |
8489eb67 | 2919 | |
93da5fff | 2920 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; |
8489eb67 | 2921 | for (i = 'a'; i <= 'z'; i++) |
8ea151b2 | 2922 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 2923 | for (i = 'A'; i <= 'Z'; i++) |
8ea151b2 | 2924 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
8489eb67 | 2925 | for (i = '0'; i <= '9'; i++) |
8ea151b2 RS |
2926 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, i, temp); |
2927 | ||
2928 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '$', temp); | |
2929 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '%', temp); | |
2930 | ||
2931 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '(', | |
2932 | Fcons (make_number (Sopen), make_number (')'))); | |
2933 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ')', | |
2934 | Fcons (make_number (Sclose), make_number ('('))); | |
2935 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '[', | |
2936 | Fcons (make_number (Sopen), make_number (']'))); | |
2937 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, ']', | |
2938 | Fcons (make_number (Sclose), make_number ('['))); | |
2939 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '{', | |
2940 | Fcons (make_number (Sopen), make_number ('}'))); | |
2941 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '}', | |
2942 | Fcons (make_number (Sclose), make_number ('{'))); | |
2943 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '"', | |
2944 | Fcons (make_number ((int) Sstring), Qnil)); | |
2945 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, '\\', | |
2946 | Fcons (make_number ((int) Sescape), Qnil)); | |
2947 | ||
93da5fff | 2948 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Ssymbol]; |
8489eb67 | 2949 | for (i = 0; i < 10; i++) |
78f9a1f7 KH |
2950 | { |
2951 | c = "_-+*/&|<>="[i]; | |
2952 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
2953 | } | |
8489eb67 | 2954 | |
93da5fff | 2955 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Spunct]; |
8489eb67 | 2956 | for (i = 0; i < 12; i++) |
78f9a1f7 KH |
2957 | { |
2958 | c = ".,;:?!#@~^'`"[i]; | |
2959 | SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table, c, temp); | |
2960 | } | |
bd25db08 KH |
2961 | |
2962 | /* All multibyte characters have syntax `word' by default. */ | |
2963 | temp = XVECTOR (Vsyntax_code_object)->contents[(int) Sword]; | |
2964 | for (i = CHAR_TABLE_SINGLE_BYTE_SLOTS; i < CHAR_TABLE_ORDINARY_SLOTS; i++) | |
2965 | XCHAR_TABLE (Vstandard_syntax_table)->contents[i] = temp; | |
8489eb67 RS |
2966 | } |
2967 | ||
dfcf069d | 2968 | void |
8489eb67 RS |
2969 | syms_of_syntax () |
2970 | { | |
2971 | Qsyntax_table_p = intern ("syntax-table-p"); | |
2972 | staticpro (&Qsyntax_table_p); | |
2973 | ||
93da5fff KH |
2974 | staticpro (&Vsyntax_code_object); |
2975 | ||
7bf5e9e4 RS |
2976 | Qscan_error = intern ("scan-error"); |
2977 | staticpro (&Qscan_error); | |
2978 | Fput (Qscan_error, Qerror_conditions, | |
f3be100f | 2979 | Fcons (Qscan_error, Fcons (Qerror, Qnil))); |
7bf5e9e4 RS |
2980 | Fput (Qscan_error, Qerror_message, |
2981 | build_string ("Scan error")); | |
2982 | ||
8489eb67 RS |
2983 | DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments, |
2984 | "Non-nil means `forward-sexp', etc., should treat comments as whitespace."); | |
2985 | ||
195d1361 RS |
2986 | DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties, |
2987 | "Non-nil means `forward-sexp', etc., grant `syntax-table' property.\n\ | |
2988 | The value of this property should be either a syntax table, or a cons\n\ | |
2989 | of the form (SYNTAXCODE . MATCHCHAR), SYNTAXCODE being the numeric\n\ | |
2990 | syntax code, MATCHCHAR being nil or the character to match (which is\n\ | |
2991 | relevant only for open/close type."); | |
2992 | ||
8489eb67 RS |
2993 | words_include_escapes = 0; |
2994 | DEFVAR_BOOL ("words-include-escapes", &words_include_escapes, | |
2995 | "Non-nil means `forward-word', etc., should treat escape chars part of words."); | |
2996 | ||
bd25db08 KH |
2997 | DEFVAR_BOOL ("multibyte-syntax-as-symbol", &multibyte_syntax_as_symbol, |
2998 | "Non-nil means `scan-sexps' treats all multibyte characters as symbol."); | |
2999 | multibyte_syntax_as_symbol = 0; | |
3000 | ||
f4ed767f GM |
3001 | DEFVAR_BOOL ("open-paren-in-column-0-is-defun-start", |
3002 | &open_paren_in_column_0_is_defun_start, | |
3003 | "Non-nil means an open paren in column 0 denotes the start of a defun."); | |
3004 | open_paren_in_column_0_is_defun_start = 1; | |
3005 | ||
8489eb67 RS |
3006 | defsubr (&Ssyntax_table_p); |
3007 | defsubr (&Ssyntax_table); | |
3008 | defsubr (&Sstandard_syntax_table); | |
3009 | defsubr (&Scopy_syntax_table); | |
3010 | defsubr (&Sset_syntax_table); | |
3011 | defsubr (&Schar_syntax); | |
beefa22e | 3012 | defsubr (&Smatching_paren); |
8489eb67 RS |
3013 | defsubr (&Smodify_syntax_entry); |
3014 | defsubr (&Sdescribe_syntax); | |
3015 | ||
3016 | defsubr (&Sforward_word); | |
3017 | ||
195d1361 RS |
3018 | defsubr (&Sskip_chars_forward); |
3019 | defsubr (&Sskip_chars_backward); | |
3020 | defsubr (&Sskip_syntax_forward); | |
3021 | defsubr (&Sskip_syntax_backward); | |
3022 | ||
b3cfe0c8 | 3023 | defsubr (&Sforward_comment); |
8489eb67 RS |
3024 | defsubr (&Sscan_lists); |
3025 | defsubr (&Sscan_sexps); | |
3026 | defsubr (&Sbackward_prefix_chars); | |
3027 | defsubr (&Sparse_partial_sexp); | |
3028 | } |