1 /* GNU Emacs routines to deal with syntax tables; also word and list parsing.
2 Copyright (C) 1985, 87, 93, 94, 95, 1997 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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
8 the Free Software Foundation; either version 2, or (at your option)
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.
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
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
29 /* Make syntax table lookup grant data in gl_state. */
30 #define SYNTAX_ENTRY_VIA_PROPERTY
33 #include "intervals.h"
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. */
39 #define ST_COMMENT_STYLE (256 + 1)
40 #define ST_STRING_STYLE (256 + 2)
43 Lisp_Object Qsyntax_table_p
, Qsyntax_table
, Qscan_error
;
45 int words_include_escapes
;
46 int parse_sexp_lookup_properties
;
48 /* Used as a temporary in SYNTAX_ENTRY and other macros in syntax.h,
49 if not compiled with GCC. No need to mark it, since it is used
50 only very temporarily. */
51 Lisp_Object syntax_temp
;
53 /* This is the internal form of the parse state used in parse-partial-sexp. */
55 struct lisp_parse_state
57 int depth
; /* Depth at end of parsing. */
58 int instring
; /* -1 if not within string, else desired terminator. */
59 int incomment
; /* Nonzero if within a comment at end of parsing. */
60 int comstyle
; /* comment style a=0, or b=1, or ST_COMMENT_STYLE. */
61 int quoted
; /* Nonzero if just after an escape char at end of parsing */
62 int thislevelstart
; /* Char number of most recent start-of-expression at current level */
63 int prevlevelstart
; /* Char number of start of containing expression */
64 int location
; /* Char number at which parsing stopped. */
65 int mindepth
; /* Minimum depth seen while scanning. */
66 int comstr_start
; /* Position just after last comment/string starter. */
69 /* These variables are a cache for finding the start of a defun.
70 find_start_pos is the place for which the defun start was found.
71 find_start_value is the defun start position found for it.
72 find_start_value_byte is the corresponding byte position.
73 find_start_buffer is the buffer it was found in.
74 find_start_begv is the BEGV value when it was found.
75 find_start_modiff is the value of MODIFF when it was found. */
77 static int find_start_pos
;
78 static int find_start_value
;
79 static int find_start_value_byte
;
80 static struct buffer
*find_start_buffer
;
81 static int find_start_begv
;
82 static int find_start_modiff
;
85 static int find_defun_start
P_ ((int, int));
86 static int back_comment
P_ ((int, int, int, int, int *, int *));
87 static int char_quoted
P_ ((int, int));
88 static Lisp_Object skip_chars
P_ ((int, int, Lisp_Object
, Lisp_Object
));
89 static Lisp_Object scan_lists
P_ ((int, int, int, int));
90 static void scan_sexps_forward
P_ ((struct lisp_parse_state
*,
92 int, Lisp_Object
, int));
95 struct gl_state_s gl_state
; /* Global state of syntax parser. */
97 INTERVAL
interval_of ();
98 #define INTERVALS_AT_ONCE 10 /* 1 + max-number of intervals
99 to scan to property-change. */
101 /* Update gl_state to an appropriate interval which contains CHARPOS. The
102 sign of COUNT give the relative position of CHARPOS wrt the previously
103 valid interval. If INIT, only [be]_property fields of gl_state are
104 valid at start, the rest is filled basing on OBJECT.
106 `gl_state.*_i' are the intervals, and CHARPOS is further in the search
107 direction than the intervals - or in an interval. We update the
108 current syntax-table basing on the property of this interval, and
109 update the interval to start further than CHARPOS - or be
110 NULL_INTERVAL. We also update lim_property to be the next value of
111 charpos to call this subroutine again - or be before/after the
112 start/end of OBJECT. */
115 update_syntax_table (charpos
, count
, init
, object
)
116 int charpos
, count
, init
;
119 Lisp_Object tmp_table
;
120 int cnt
= 0, doing_extra
= 0, invalidate
= 1;
125 gl_state
.start
= gl_state
.b_property
;
126 gl_state
.stop
= gl_state
.e_property
;
127 gl_state
.forward_i
= interval_of (charpos
, object
);
128 i
= gl_state
.backward_i
= gl_state
.forward_i
;
129 gl_state
.left_ok
= gl_state
.right_ok
= 1;
131 if (NULL_INTERVAL_P (i
))
133 gl_state
.b_property
= i
->position
- 1;
134 gl_state
.e_property
= INTERVAL_LAST_POS (i
);
137 oldi
= i
= count
> 0 ? gl_state
.forward_i
: gl_state
.backward_i
;
139 /* We are guarantied to be called with CHARPOS either in i,
141 if (NULL_INTERVAL_P (i
))
142 error ("Error in syntax_table logic for to-the-end intervals");
143 else if (charpos
< i
->position
) /* Move left. */
146 error ("Error in syntax_table logic for intervals <-.");
147 /* Update the interval. */
148 i
= update_interval (i
, charpos
);
149 if (oldi
->position
!= INTERVAL_LAST_POS (i
))
152 gl_state
.right_ok
= 1; /* Invalidate the other end. */
153 gl_state
.forward_i
= i
;
154 gl_state
.e_property
= INTERVAL_LAST_POS (i
);
157 else if (charpos
>= INTERVAL_LAST_POS (i
)) /* Move right. */
160 error ("Error in syntax_table logic for intervals ->.");
161 /* Update the interval. */
162 i
= update_interval (i
, charpos
);
163 if (i
->position
!= INTERVAL_LAST_POS (oldi
))
166 gl_state
.left_ok
= 1; /* Invalidate the other end. */
167 gl_state
.backward_i
= i
;
168 gl_state
.b_property
= i
->position
- 1;
171 else if (count
> 0 ? gl_state
.right_ok
: gl_state
.left_ok
)
173 /* We do not need to recalculate tmp_table. */
174 tmp_table
= gl_state
.old_prop
;
178 tmp_table
= textget (i
->plist
, Qsyntax_table
);
181 invalidate
= !EQ (tmp_table
, gl_state
.old_prop
); /* Need to invalidate? */
183 if (invalidate
) /* Did not get to adjacent interval. */
184 { /* with the same table => */
185 /* invalidate the old range. */
188 gl_state
.backward_i
= i
;
189 gl_state
.left_ok
= 1; /* Invalidate the other end. */
190 gl_state
.b_property
= i
->position
- 1;
194 gl_state
.forward_i
= i
;
195 gl_state
.right_ok
= 1; /* Invalidate the other end. */
196 gl_state
.e_property
= INTERVAL_LAST_POS (i
);
200 gl_state
.current_syntax_table
= tmp_table
;
201 gl_state
.old_prop
= tmp_table
;
202 if (EQ (Fsyntax_table_p (tmp_table
), Qt
))
204 gl_state
.use_global
= 0;
206 else if (CONSP (tmp_table
))
208 gl_state
.use_global
= 1;
209 gl_state
.global_code
= tmp_table
;
213 gl_state
.use_global
= 0;
214 gl_state
.current_syntax_table
= current_buffer
->syntax_table
;
217 while (!NULL_INTERVAL_P (i
))
219 if (cnt
&& !EQ (tmp_table
, textget (i
->plist
, Qsyntax_table
)))
222 gl_state
.right_ok
= 0;
224 gl_state
.left_ok
= 0;
227 else if (cnt
== INTERVALS_AT_ONCE
)
230 gl_state
.right_ok
= 1;
232 gl_state
.left_ok
= 1;
236 i
= count
> 0 ? next_interval (i
) : previous_interval (i
);
238 if (NULL_INTERVAL_P (i
))
239 { /* This property goes to the end. */
241 gl_state
.e_property
= gl_state
.stop
;
243 gl_state
.b_property
= gl_state
.start
;
249 gl_state
.e_property
= i
->position
;
250 gl_state
.forward_i
= i
;
254 gl_state
.b_property
= i
->position
+ LENGTH (i
) - 1;
255 gl_state
.backward_i
= i
;
260 /* Returns TRUE if char at CHARPOS is quoted.
261 Global syntax-table data should be set up already to be good at CHARPOS
262 or after. On return global syntax data is good for lookup at CHARPOS. */
265 char_quoted (charpos
, bytepos
)
266 register int charpos
, bytepos
;
268 register enum syntaxcode code
;
269 register int beg
= BEGV
;
270 register int quoted
= 0;
273 DEC_BOTH (charpos
, bytepos
);
275 while (bytepos
>= beg
)
277 UPDATE_SYNTAX_TABLE_BACKWARD (charpos
);
278 code
= SYNTAX (FETCH_CHAR (bytepos
));
279 if (! (code
== Scharquote
|| code
== Sescape
))
282 DEC_BOTH (charpos
, bytepos
);
286 UPDATE_SYNTAX_TABLE (orig
);
290 /* Return the bytepos one character after BYTEPOS.
291 We assume that BYTEPOS is not at the end of the buffer. */
294 inc_bytepos (bytepos
)
301 /* Return the bytepos one character before BYTEPOS.
302 We assume that BYTEPOS is not at the start of the buffer. */
305 dec_bytepos (bytepos
)
312 /* Find a defun-start that is the last one before POS (or nearly the last).
313 We record what we find, so that another call in the same area
314 can return the same value right away.
316 There is no promise at which position the global syntax data is
317 valid on return from the subroutine, so the caller should explicitly
318 update the global data. */
321 find_defun_start (pos
, pos_byte
)
326 int opoint
= PT
, opoint_byte
= PT_BYTE
;
328 /* Use previous finding, if it's valid and applies to this inquiry. */
329 if (current_buffer
== find_start_buffer
330 /* Reuse the defun-start even if POS is a little farther on.
331 POS might be in the next defun, but that's ok.
332 Our value may not be the best possible, but will still be usable. */
333 && pos
<= find_start_pos
+ 1000
334 && pos
>= find_start_value
335 && BEGV
== find_start_begv
336 && MODIFF
== find_start_modiff
)
337 return find_start_value
;
339 /* Back up to start of line. */
340 scan_newline (pos
, pos_byte
, BEGV
, BEGV_BYTE
, -1, 1);
342 /* We optimize syntax-table lookup for rare updates. Thus we accept
343 only those `^\s(' which are good in global _and_ text-property
345 gl_state
.current_syntax_table
= current_buffer
->syntax_table
;
346 gl_state
.use_global
= 0;
349 /* Open-paren at start of line means we found our defun-start. */
350 if (SYNTAX (FETCH_CHAR (PT_BYTE
)) == Sopen
)
352 SETUP_SYNTAX_TABLE (PT
+ 1, -1); /* Try again... */
353 if (SYNTAX (FETCH_CHAR (PT_BYTE
)) == Sopen
)
355 /* Now fallback to the default value. */
356 gl_state
.current_syntax_table
= current_buffer
->syntax_table
;
357 gl_state
.use_global
= 0;
359 /* Move to beg of previous line. */
360 scan_newline (PT
, PT_BYTE
, BEGV
, BEGV_BYTE
, -2, 1);
363 /* Record what we found, for the next try. */
364 find_start_value
= PT
;
365 find_start_value_byte
= PT_BYTE
;
366 find_start_buffer
= current_buffer
;
367 find_start_modiff
= MODIFF
;
368 find_start_begv
= BEGV
;
369 find_start_pos
= pos
;
371 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
373 return find_start_value
;
376 /* Checks whether charpos FROM is at the end of a comment.
377 FROM_BYTE is the bytepos corresponding to FROM.
378 Do not move back before STOP.
380 Return a positive value if we find a comment ending at FROM/FROM_BYTE;
383 If successful, store the charpos of the comment's beginning
384 into *CHARPOS_PTR, and the bytepos into *BYTEPOS_PTR.
386 Global syntax data remains valid for backward search starting at
387 the returned value (or at FROM, if the search was not successful). */
390 back_comment (from
, from_byte
, stop
, comstyle
, charpos_ptr
, bytepos_ptr
)
391 int from
, from_byte
, stop
;
393 int *charpos_ptr
, *bytepos_ptr
;
395 /* Look back, counting the parity of string-quotes,
396 and recording the comment-starters seen.
397 When we reach a safe place, assume that's not in a string;
398 then step the main scan to the earliest comment-starter seen
399 an even number of string quotes away from the safe place.
401 OFROM[I] is position of the earliest comment-starter seen
402 which is I+2X quotes from the comment-end.
403 PARITY is current parity of quotes from the comment end. */
405 int my_stringend
= 0;
406 int string_lossage
= 0;
407 int comment_end
= from
;
408 int comment_end_byte
= from_byte
;
409 int comstart_pos
= 0;
410 int comstart_parity
= 0;
412 int scanstart
= from
- 1;
413 register enum syntaxcode code
;
416 /* At beginning of range to scan, we're outside of strings;
417 that determines quote parity to the comment-end. */
422 /* Move back and examine a character. */
423 DEC_BOTH (from
, from_byte
);
424 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
426 c
= FETCH_CHAR (from_byte
);
429 /* If this char is the second of a 2-char comment end sequence,
430 back up and give the pair the appropriate syntax. */
431 if (from
> stop
&& SYNTAX_COMEND_SECOND (c
)
432 && (temp_byte
= dec_bytepos (from_byte
),
433 SYNTAX_COMEND_FIRST (FETCH_CHAR (temp_byte
))))
436 DEC_BOTH (from
, from_byte
);
437 /* This is apparently the best we can do: */
438 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
439 c
= FETCH_CHAR (from_byte
);
442 /* If this char starts a 2-char comment start sequence,
443 treat it like a 1-char comment starter. */
444 if (from
< scanstart
&& SYNTAX_COMSTART_FIRST (c
)
445 && (temp_byte
= inc_bytepos (from_byte
),
446 (SYNTAX_COMSTART_SECOND (FETCH_CHAR (temp_byte
))
447 && comstyle
== SYNTAX_COMMENT_STYLE (FETCH_CHAR (temp_byte
)))))
450 /* Ignore escaped characters. */
451 if (char_quoted (from
, from_byte
))
454 /* Track parity of quotes. */
458 if (my_stringend
== 0)
460 /* If we have two kinds of string delimiters.
461 There's no way to grok this scanning backwards. */
462 else if (my_stringend
!= c
)
466 if (code
== Sstring_fence
|| code
== Scomment_fence
)
469 if (my_stringend
== 0)
471 = code
== Sstring_fence
? ST_STRING_STYLE
: ST_COMMENT_STYLE
;
472 /* If we have two kinds of string delimiters.
473 There's no way to grok this scanning backwards. */
474 else if (my_stringend
!= (code
== Sstring_fence
475 ? ST_STRING_STYLE
: ST_COMMENT_STYLE
))
479 /* Record comment-starters according to that
480 quote-parity to the comment-end. */
481 if (code
== Scomment
)
483 comstart_parity
= parity
;
485 comstart_byte
= from_byte
;
488 /* If we find another earlier comment-ender,
489 any comment-starts earlier than that don't count
490 (because they go with the earlier comment-ender). */
491 if (code
== Sendcomment
492 && SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte
)) == comstyle
)
495 /* Assume a defun-start point is outside of strings. */
498 || (temp_byte
= dec_bytepos (from_byte
),
499 FETCH_CHAR (temp_byte
) == '\n')))
503 if (comstart_pos
== 0)
506 from_byte
= comment_end_byte
;
507 UPDATE_SYNTAX_TABLE_FORWARD (comment_end
- 1);
509 /* If the earliest comment starter
510 is followed by uniform paired string quotes or none,
511 we know it can't be inside a string
512 since if it were then the comment ender would be inside one.
513 So it does start a comment. Skip back to it. */
514 else if (comstart_parity
== 0 && !string_lossage
)
517 from_byte
= comstart_byte
;
518 /* Globals are correct now. */
522 /* We had two kinds of string delimiters mixed up
523 together. Decode this going forwards.
524 Scan fwd from the previous comment ender
525 to the one in question; this records where we
526 last passed a comment starter. */
527 struct lisp_parse_state state
;
528 scan_sexps_forward (&state
,
529 find_defun_start (comment_end
, comment_end_byte
),
530 find_start_value_byte
,
531 comment_end
- 1, -10000, 0, Qnil
, 0);
534 /* scan_sexps_forward changed the direction of search in
535 global variables, so we need to update it completely. */
537 from
= state
.comstr_start
;
543 from_byte
= CHAR_TO_BYTE (from
);
544 UPDATE_SYNTAX_TABLE_FORWARD (from
- 1);
548 *bytepos_ptr
= from_byte
;
553 DEFUN ("syntax-table-p", Fsyntax_table_p
, Ssyntax_table_p
, 1, 1, 0,
554 "Return t if OBJECT is a syntax table.\n\
555 Currently, any char-table counts as a syntax table.")
559 if (CHAR_TABLE_P (object
)
560 && EQ (XCHAR_TABLE (object
)->purpose
, Qsyntax_table
))
566 check_syntax_table (obj
)
569 if (!(CHAR_TABLE_P (obj
)
570 && EQ (XCHAR_TABLE (obj
)->purpose
, Qsyntax_table
)))
571 wrong_type_argument (Qsyntax_table_p
, obj
);
574 DEFUN ("syntax-table", Fsyntax_table
, Ssyntax_table
, 0, 0, 0,
575 "Return the current syntax table.\n\
576 This is the one specified by the current buffer.")
579 return current_buffer
->syntax_table
;
582 DEFUN ("standard-syntax-table", Fstandard_syntax_table
,
583 Sstandard_syntax_table
, 0, 0, 0,
584 "Return the standard syntax table.\n\
585 This is the one used for new buffers.")
588 return Vstandard_syntax_table
;
591 DEFUN ("copy-syntax-table", Fcopy_syntax_table
, Scopy_syntax_table
, 0, 1, 0,
592 "Construct a new syntax table and return it.\n\
593 It is a copy of the TABLE, which defaults to the standard syntax table.")
600 check_syntax_table (table
);
602 table
= Vstandard_syntax_table
;
604 copy
= Fcopy_sequence (table
);
606 /* Only the standard syntax table should have a default element.
607 Other syntax tables should inherit from parents instead. */
608 XCHAR_TABLE (copy
)->defalt
= Qnil
;
610 /* Copied syntax tables should all have parents.
611 If we copied one with no parent, such as the standard syntax table,
612 use the standard syntax table as the copy's parent. */
613 if (NILP (XCHAR_TABLE (copy
)->parent
))
614 Fset_char_table_parent (copy
, Vstandard_syntax_table
);
618 DEFUN ("set-syntax-table", Fset_syntax_table
, Sset_syntax_table
, 1, 1, 0,
619 "Select a new syntax table for the current buffer.\n\
620 One argument, a syntax table.")
624 check_syntax_table (table
);
625 current_buffer
->syntax_table
= table
;
626 /* Indicate that this buffer now has a specified syntax table. */
627 current_buffer
->local_var_flags
628 |= XFASTINT (buffer_local_flags
.syntax_table
);
632 /* Convert a letter which signifies a syntax code
633 into the code it signifies.
634 This is used by modify-syntax-entry, and other things. */
636 unsigned char syntax_spec_code
[0400] =
637 { 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
638 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
639 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
640 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
641 (char) Swhitespace
, (char) Scomment_fence
, (char) Sstring
, 0377,
642 (char) Smath
, 0377, 0377, (char) Squote
,
643 (char) Sopen
, (char) Sclose
, 0377, 0377,
644 0377, (char) Swhitespace
, (char) Spunct
, (char) Scharquote
,
645 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
646 0377, 0377, 0377, 0377,
647 (char) Scomment
, 0377, (char) Sendcomment
, 0377,
648 (char) Sinherit
, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* @, A ... */
649 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
650 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword
,
651 0377, 0377, 0377, 0377, (char) Sescape
, 0377, 0377, (char) Ssymbol
,
652 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377, /* `, a, ... */
653 0377, 0377, 0377, 0377, 0377, 0377, 0377, 0377,
654 0377, 0377, 0377, 0377, 0377, 0377, 0377, (char) Sword
,
655 0377, 0377, 0377, 0377, (char) Sstring_fence
, 0377, 0377, 0377
658 /* Indexed by syntax code, give the letter that describes it. */
660 char syntax_code_spec
[16] =
662 ' ', '.', 'w', '_', '(', ')', '\'', '\"', '$', '\\', '/', '<', '>', '@',
666 /* Indexed by syntax code, give the object (cons of syntax code and
667 nil) to be stored in syntax table. Since these objects can be
668 shared among syntax tables, we generate them in advance. By
669 sharing objects, the function `describe-syntax' can give a more
671 static Lisp_Object Vsyntax_code_object
;
674 /* Look up the value for CHARACTER in syntax table TABLE's parent
675 and its parents. SYNTAX_ENTRY calls this, when TABLE itself has nil
676 for CHARACTER. It's actually used only when not compiled with GCC. */
679 syntax_parent_lookup (table
, character
)
687 table
= XCHAR_TABLE (table
)->parent
;
691 value
= XCHAR_TABLE (table
)->contents
[character
];
697 DEFUN ("char-syntax", Fchar_syntax
, Schar_syntax
, 1, 1, 0,
698 "Return the syntax code of CHARACTER, described by a character.\n\
699 For example, if CHARACTER is a word constituent,\n\
700 the character `w' is returned.\n\
701 The characters that correspond to various syntax codes\n\
702 are listed in the documentation of `modify-syntax-entry'.")
704 Lisp_Object character
;
707 gl_state
.current_syntax_table
= current_buffer
->syntax_table
;
709 gl_state
.use_global
= 0;
710 CHECK_NUMBER (character
, 0);
711 char_int
= XINT (character
);
712 return make_number (syntax_code_spec
[(int) SYNTAX (char_int
)]);
715 DEFUN ("matching-paren", Fmatching_paren
, Smatching_paren
, 1, 1, 0,
716 "Return the matching parenthesis of CHARACTER, or nil if none.")
718 Lisp_Object character
;
721 gl_state
.current_syntax_table
= current_buffer
->syntax_table
;
722 gl_state
.use_global
= 0;
723 CHECK_NUMBER (character
, 0);
724 char_int
= XINT (character
);
725 code
= SYNTAX (char_int
);
726 if (code
== Sopen
|| code
== Sclose
)
727 return SYNTAX_MATCH (char_int
);
731 /* This comment supplies the doc string for modify-syntax-entry,
732 for make-docfile to see. We cannot put this in the real DEFUN
733 due to limits in the Unix cpp.
735 DEFUN ("modify-syntax-entry", foo, bar, 2, 3, 0,
736 "Set syntax for character CHAR according to string S.\n\
737 The syntax is changed only for table TABLE, which defaults to\n\
738 the current buffer's syntax table.\n\
739 The first character of S should be one of the following:\n\
740 Space or - whitespace syntax. w word constituent.\n\
741 _ symbol constituent. . punctuation.\n\
742 ( open-parenthesis. ) close-parenthesis.\n\
743 \" string quote. \\ escape.\n\
744 $ paired delimiter. ' expression quote or prefix operator.\n\
745 < comment starter. > comment ender.\n\
746 / character-quote. @ inherit from `standard-syntax-table'.\n\
748 Only single-character comment start and end sequences are represented thus.\n\
749 Two-character sequences are represented as described below.\n\
750 The second character of S is the matching parenthesis,\n\
751 used only if the first character is `(' or `)'.\n\
752 Any additional characters are flags.\n\
753 Defined flags are the characters 1, 2, 3, 4, b, and p.\n\
754 1 means CHAR is the start of a two-char comment start sequence.\n\
755 2 means CHAR is the second character of such a sequence.\n\
756 3 means CHAR is the start of a two-char comment end sequence.\n\
757 4 means CHAR is the second character of such a sequence.\n\
759 There can be up to two orthogonal comment sequences. This is to support\n\
760 language modes such as C++. By default, all comment sequences are of style\n\
761 a, but you can set the comment sequence style to b (on the second character\n\
762 of a comment-start, or the first character of a comment-end sequence) using\n\
764 b means CHAR is part of comment sequence b.\n\
766 p means CHAR is a prefix character for `backward-prefix-chars';\n\
767 such characters are treated as whitespace when they occur\n\
768 between expressions.")
772 DEFUN ("modify-syntax-entry", Fmodify_syntax_entry
, Smodify_syntax_entry
, 2, 3,
773 /* I really don't know why this is interactive
774 help-form should at least be made useful whilst reading the second arg
776 "cSet syntax for character: \nsSet syntax for %s to: ",
777 0 /* See immediately above */)
778 (c
, newentry
, syntax_table
)
779 Lisp_Object c
, newentry
, syntax_table
;
781 register unsigned char *p
;
782 register enum syntaxcode code
;
787 CHECK_STRING (newentry
, 1);
789 if (NILP (syntax_table
))
790 syntax_table
= current_buffer
->syntax_table
;
792 check_syntax_table (syntax_table
);
794 p
= XSTRING (newentry
)->data
;
795 code
= (enum syntaxcode
) syntax_spec_code
[*p
++];
796 if (((int) code
& 0377) == 0377)
797 error ("invalid syntax description letter: %c", p
[-1]);
799 if (code
== Sinherit
)
801 SET_RAW_SYNTAX_ENTRY (syntax_table
, XINT (c
), Qnil
);
808 int character
= STRING_CHAR_AND_LENGTH (p
, XSTRING (newentry
)->size
- 1,
810 XSETINT (match
, character
);
811 if (XFASTINT (match
) == ' ')
847 if (val
< XVECTOR (Vsyntax_code_object
)->size
&& NILP (match
))
848 newentry
= XVECTOR (Vsyntax_code_object
)->contents
[val
];
850 /* Since we can't use a shared object, let's make a new one. */
851 newentry
= Fcons (make_number (val
), match
);
853 SET_RAW_SYNTAX_ENTRY (syntax_table
, XINT (c
), newentry
);
858 /* Dump syntax table to buffer in human-readable format */
861 describe_syntax (value
)
864 register enum syntaxcode code
;
865 char desc
, match
, start1
, start2
, end1
, end2
, prefix
, comstyle
;
867 Lisp_Object first
, match_lisp
;
869 Findent_to (make_number (16), make_number (1));
873 insert_string ("default\n");
877 if (CHAR_TABLE_P (value
))
879 insert_string ("deeper char-table ...\n");
885 insert_string ("invalid\n");
889 first
= XCONS (value
)->car
;
890 match_lisp
= XCONS (value
)->cdr
;
892 if (!INTEGERP (first
) || !(NILP (match_lisp
) || INTEGERP (match_lisp
)))
894 insert_string ("invalid\n");
898 code
= (enum syntaxcode
) (XINT (first
) & 0377);
899 start1
= (XINT (first
) >> 16) & 1;
900 start2
= (XINT (first
) >> 17) & 1;
901 end1
= (XINT (first
) >> 18) & 1;
902 end2
= (XINT (first
) >> 19) & 1;
903 prefix
= (XINT (first
) >> 20) & 1;
904 comstyle
= (XINT (first
) >> 21) & 1;
906 if ((int) code
< 0 || (int) code
>= (int) Smax
)
908 insert_string ("invalid");
911 desc
= syntax_code_spec
[(int) code
];
913 str
[0] = desc
, str
[1] = 0;
916 if (NILP (match_lisp
))
919 insert_char (XINT (match_lisp
));
936 insert_string ("\twhich means: ");
938 switch (SWITCH_ENUM_CAST (code
))
941 insert_string ("whitespace"); break;
943 insert_string ("punctuation"); break;
945 insert_string ("word"); break;
947 insert_string ("symbol"); break;
949 insert_string ("open"); break;
951 insert_string ("close"); break;
953 insert_string ("quote"); break;
955 insert_string ("string"); break;
957 insert_string ("math"); break;
959 insert_string ("escape"); break;
961 insert_string ("charquote"); break;
963 insert_string ("comment"); break;
965 insert_string ("endcomment"); break;
967 insert_string ("invalid");
971 if (!NILP (match_lisp
))
973 insert_string (", matches ");
974 insert_char (XINT (match_lisp
));
978 insert_string (",\n\t is the first character of a comment-start sequence");
980 insert_string (",\n\t is the second character of a comment-start sequence");
983 insert_string (",\n\t is the first character of a comment-end sequence");
985 insert_string (",\n\t is the second character of a comment-end sequence");
987 insert_string (" (comment style b)");
990 insert_string (",\n\t is a prefix character for `backward-prefix-chars'");
992 insert_string ("\n");
996 describe_syntax_1 (vector
)
999 struct buffer
*old
= current_buffer
;
1000 set_buffer_internal (XBUFFER (Vstandard_output
));
1001 describe_vector (vector
, Qnil
, describe_syntax
, 0, Qnil
, Qnil
, (int *) 0, 0);
1002 while (! NILP (XCHAR_TABLE (vector
)->parent
))
1004 vector
= XCHAR_TABLE (vector
)->parent
;
1005 insert_string ("\nThe parent syntax table is:");
1006 describe_vector (vector
, Qnil
, describe_syntax
, 0, Qnil
, Qnil
,
1010 call0 (intern ("help-mode"));
1011 set_buffer_internal (old
);
1015 DEFUN ("describe-syntax", Fdescribe_syntax
, Sdescribe_syntax
, 0, 0, "",
1016 "Describe the syntax specifications in the syntax table.\n\
1017 The descriptions are inserted in a buffer, which is then displayed.")
1020 internal_with_output_to_temp_buffer
1021 ("*Help*", describe_syntax_1
, current_buffer
->syntax_table
);
1026 int parse_sexp_ignore_comments
;
1028 /* Return the position across COUNT words from FROM.
1029 If that many words cannot be found before the end of the buffer, return 0.
1030 COUNT negative means scan backward and stop at word beginning. */
1032 scan_words (from
, count
)
1033 register int from
, count
;
1035 register int beg
= BEGV
;
1036 register int end
= ZV
;
1037 register int from_byte
= CHAR_TO_BYTE (from
);
1038 register enum syntaxcode code
;
1044 SETUP_SYNTAX_TABLE (from
, count
);
1055 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1056 ch0
= FETCH_CHAR (from_byte
);
1057 code
= SYNTAX (ch0
);
1058 INC_BOTH (from
, from_byte
);
1059 if (words_include_escapes
1060 && (code
== Sescape
|| code
== Scharquote
))
1065 /* Now CH0 is a character which begins a word and FROM is the
1066 position of the next character. */
1069 if (from
== end
) break;
1070 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1071 ch1
= FETCH_CHAR (from_byte
);
1072 code
= SYNTAX (ch1
);
1073 if (!(words_include_escapes
1074 && (code
== Sescape
|| code
== Scharquote
)))
1075 if (code
!= Sword
|| WORD_BOUNDARY_P (ch0
, ch1
))
1077 INC_BOTH (from
, from_byte
);
1091 DEC_BOTH (from
, from_byte
);
1092 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
1093 ch1
= FETCH_CHAR (from_byte
);
1094 code
= SYNTAX (ch1
);
1095 if (words_include_escapes
1096 && (code
== Sescape
|| code
== Scharquote
))
1101 /* Now CH1 is a character which ends a word and FROM is the
1109 temp_byte
= dec_bytepos (from_byte
);
1110 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
1111 ch0
= FETCH_CHAR (temp_byte
);
1112 code
= SYNTAX (ch0
);
1113 if (!(words_include_escapes
1114 && (code
== Sescape
|| code
== Scharquote
)))
1115 if (code
!= Sword
|| WORD_BOUNDARY_P (ch0
, ch1
))
1117 DEC_BOTH (from
, from_byte
);
1128 DEFUN ("forward-word", Fforward_word
, Sforward_word
, 1, 1, "p",
1129 "Move point forward ARG words (backward if ARG is negative).\n\
1130 Normally returns t.\n\
1131 If an edge of the buffer is reached, point is left there\n\
1132 and nil is returned.")
1137 CHECK_NUMBER (count
, 0);
1139 if (!(val
= scan_words (PT
, XINT (count
))))
1141 SET_PT (XINT (count
) > 0 ? ZV
: BEGV
);
1148 Lisp_Object
skip_chars ();
1150 DEFUN ("skip-chars-forward", Fskip_chars_forward
, Sskip_chars_forward
, 1, 2, 0,
1151 "Move point forward, stopping before a char not in STRING, or at pos LIM.\n\
1152 STRING is like the inside of a `[...]' in a regular expression\n\
1153 except that `]' is never special and `\\' quotes `^', `-' or `\\'.\n\
1154 Thus, with arg \"a-zA-Z\", this skips letters stopping before first nonletter.\n\
1155 With arg \"^a-zA-Z\", skips nonletters stopping before first letter.\n\
1156 Returns the distance traveled, either zero or positive.")
1158 Lisp_Object string
, lim
;
1160 return skip_chars (1, 0, string
, lim
);
1163 DEFUN ("skip-chars-backward", Fskip_chars_backward
, Sskip_chars_backward
, 1, 2, 0,
1164 "Move point backward, stopping after a char not in STRING, or at pos LIM.\n\
1165 See `skip-chars-forward' for details.\n\
1166 Returns the distance traveled, either zero or negative.")
1168 Lisp_Object string
, lim
;
1170 return skip_chars (0, 0, string
, lim
);
1173 DEFUN ("skip-syntax-forward", Fskip_syntax_forward
, Sskip_syntax_forward
, 1, 2, 0,
1174 "Move point forward across chars in specified syntax classes.\n\
1175 SYNTAX is a string of syntax code characters.\n\
1176 Stop before a char whose syntax is not in SYNTAX, or at position LIM.\n\
1177 If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\
1178 This function returns the distance traveled, either zero or positive.")
1180 Lisp_Object syntax
, lim
;
1182 return skip_chars (1, 1, syntax
, lim
);
1185 DEFUN ("skip-syntax-backward", Fskip_syntax_backward
, Sskip_syntax_backward
, 1, 2, 0,
1186 "Move point backward across chars in specified syntax classes.\n\
1187 SYNTAX is a string of syntax code characters.\n\
1188 Stop on reaching a char whose syntax is not in SYNTAX, or at position LIM.\n\
1189 If SYNTAX starts with ^, skip characters whose syntax is NOT in SYNTAX.\n\
1190 This function returns the distance traveled, either zero or negative.")
1192 Lisp_Object syntax
, lim
;
1194 return skip_chars (0, 1, syntax
, lim
);
1198 skip_chars (forwardp
, syntaxp
, string
, lim
)
1199 int forwardp
, syntaxp
;
1200 Lisp_Object string
, lim
;
1202 register unsigned char *p
, *pend
;
1203 register unsigned int c
;
1205 unsigned char fastmap
[0400];
1206 /* If SYNTAXP is 0, STRING may contain multi-byte form of characters
1207 of which codes don't fit in FASTMAP. In that case, we set the
1208 first byte of multibyte form (i.e. base leading-code) in FASTMAP
1209 and set the actual ranges of characters in CHAR_RANGES. In the
1210 form "X-Y" of STRING, both X and Y must belong to the same
1211 character set because a range striding across character sets is
1214 int n_char_ranges
= 0;
1217 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
1219 CHECK_STRING (string
, 0);
1220 char_ranges
= (int *) alloca (XSTRING (string
)->size
* (sizeof (int)) * 2);
1223 XSETINT (lim
, forwardp
? ZV
: BEGV
);
1225 CHECK_NUMBER_COERCE_MARKER (lim
, 0);
1227 /* In any case, don't allow scan outside bounds of buffer. */
1228 if (XINT (lim
) > ZV
)
1229 XSETFASTINT (lim
, ZV
);
1230 if (XINT (lim
) < BEGV
)
1231 XSETFASTINT (lim
, BEGV
);
1233 p
= XSTRING (string
)->data
;
1234 pend
= p
+ XSTRING (string
)->size
;
1235 bzero (fastmap
, sizeof fastmap
);
1237 if (p
!= pend
&& *p
== '^')
1242 /* Find the characters specified and set their elements of fastmap.
1243 If syntaxp, each character counts as itself.
1244 Otherwise, handle backslashes and ranges specially. */
1251 ch
= STRING_CHAR (p
, pend
- p
);
1252 p
+= BYTES_BY_CHAR_HEAD (*p
);
1260 fastmap
[syntax_spec_code
[c
]] = 1;
1265 if (p
== pend
) break;
1268 if (p
!= pend
&& *p
== '-')
1273 if (p
== pend
) break;
1274 if (SINGLE_BYTE_CHAR_P (ch
))
1282 fastmap
[c
] = 1; /* C is the base leading-code. */
1283 ch2
= STRING_CHAR (p
, pend
- p
);
1285 char_ranges
[n_char_ranges
++] = ch
,
1286 char_ranges
[n_char_ranges
++] = ch2
;
1288 p
+= multibyte
? BYTES_BY_CHAR_HEAD (*p
) : 1;
1293 if (!SINGLE_BYTE_CHAR_P (ch
))
1295 char_ranges
[n_char_ranges
++] = ch
;
1296 char_ranges
[n_char_ranges
++] = ch
;
1302 /* If ^ was the first character, complement the fastmap. In
1303 addition, as all multibyte characters have possibility of
1304 matching, set all entries for base leading codes, which is
1305 harmless even if SYNTAXP is 1. */
1308 for (i
= 0; i
< sizeof fastmap
; i
++)
1310 if (!multibyte
|| !BASE_LEADING_CODE_P (i
))
1317 int start_point
= PT
;
1319 int pos_byte
= PT_BYTE
;
1324 SETUP_SYNTAX_TABLE (pos
, forwardp
? 1 : -1);
1329 while (pos
< XINT (lim
)
1330 && fastmap
[(int) SYNTAX (FETCH_CHAR (pos_byte
))])
1332 INC_BOTH (pos
, pos_byte
);
1333 UPDATE_SYNTAX_TABLE_FORWARD (pos
);
1338 while (pos
< XINT (lim
)
1339 && fastmap
[(int) SYNTAX (FETCH_BYTE (pos
))])
1342 UPDATE_SYNTAX_TABLE_FORWARD (pos
);
1350 while (pos
> XINT (lim
))
1352 int savepos
= pos_byte
;
1353 DEC_BOTH (pos
, pos_byte
);
1354 UPDATE_SYNTAX_TABLE_BACKWARD (pos
);
1355 if (!fastmap
[(int) SYNTAX (FETCH_CHAR (pos_byte
))])
1365 while (pos
> XINT (lim
))
1368 UPDATE_SYNTAX_TABLE_BACKWARD (pos
);
1369 if (!fastmap
[(int) SYNTAX (FETCH_BYTE (pos
))])
1383 while (pos
< XINT (lim
) && fastmap
[(c
= FETCH_BYTE (pos_byte
))])
1385 if (!BASE_LEADING_CODE_P (c
))
1386 INC_BOTH (pos
, pos_byte
);
1387 else if (n_char_ranges
)
1389 /* We much check CHAR_RANGES for a multibyte
1391 ch
= FETCH_MULTIBYTE_CHAR (pos_byte
);
1392 for (i
= 0; i
< n_char_ranges
; i
+= 2)
1393 if ((ch
>= char_ranges
[i
] && ch
<= char_ranges
[i
+ 1]))
1395 if (!(negate
^ (i
< n_char_ranges
)))
1398 INC_BOTH (pos
, pos_byte
);
1403 INC_BOTH (pos
, pos_byte
);
1407 while (pos
< XINT (lim
) && fastmap
[FETCH_BYTE (pos
)])
1413 while (pos
> XINT (lim
))
1415 int savepos
= pos_byte
;
1416 DEC_BOTH (pos
, pos_byte
);
1417 if (fastmap
[(c
= FETCH_BYTE (pos_byte
))])
1419 if (!BASE_LEADING_CODE_P (c
))
1421 else if (n_char_ranges
)
1423 /* We much check CHAR_RANGES for a multibyte
1425 ch
= FETCH_MULTIBYTE_CHAR (pos_byte
);
1426 for (i
= 0; i
< n_char_ranges
; i
+= 2)
1427 if (ch
>= char_ranges
[i
] && ch
<= char_ranges
[i
+ 1])
1429 if (!(negate
^ (i
< n_char_ranges
)))
1452 while (pos
> XINT (lim
) && fastmap
[FETCH_BYTE (pos
- 1)])
1457 #if 0 /* Not needed now that a position in mid-character
1458 cannot be specified in Lisp. */
1460 /* INC_POS or DEC_POS might have moved POS over LIM. */
1461 && (forwardp
? (pos
> XINT (lim
)) : (pos
< XINT (lim
))))
1468 SET_PT_BOTH (pos
, pos_byte
);
1471 return make_number (PT
- start_point
);
1475 DEFUN ("forward-comment", Fforward_comment
, Sforward_comment
, 1, 1, 0,
1476 "Move forward across up to N comments. If N is negative, move backward.\n\
1477 Stop scanning if we find something other than a comment or whitespace.\n\
1478 Set point to where scanning stops.\n\
1479 If N comments are found as expected, with nothing except whitespace\n\
1480 between them, return t; otherwise return nil.")
1488 register enum syntaxcode code
;
1489 int comstyle
= 0; /* style of comment encountered */
1493 int out_charpos
, out_bytepos
;
1495 CHECK_NUMBER (count
, 0);
1496 count1
= XINT (count
);
1497 stop
= count1
> 0 ? ZV
: BEGV
;
1503 from_byte
= PT_BYTE
;
1505 SETUP_SYNTAX_TABLE (from
, count1
);
1512 if (! NILP (current_buffer
->enable_multibyte_characters
))
1513 SET_PT_BOTH (from
, from_byte
);
1515 SET_PT_BOTH (from_byte
, from_byte
);
1519 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1520 c
= FETCH_CHAR (from_byte
);
1522 INC_BOTH (from
, from_byte
);
1524 if (from
< stop
&& SYNTAX_COMSTART_FIRST (c
)
1525 && (c1
= FETCH_CHAR (from_byte
),
1526 SYNTAX_COMSTART_SECOND (c1
)))
1528 /* We have encountered a comment start sequence and we
1529 are ignoring all text inside comments. We must record
1530 the comment style this sequence begins so that later,
1531 only a comment end of the same style actually ends
1532 the comment section. */
1534 comstyle
= SYNTAX_COMMENT_STYLE (c1
);
1535 INC_BOTH (from
, from_byte
);
1538 while (code
== Swhitespace
|| code
== Sendcomment
);
1540 if (code
!= Scomment
&& code
!= Scomment_fence
)
1543 DEC_BOTH (from
, from_byte
);
1544 if (! NILP (current_buffer
->enable_multibyte_characters
))
1545 SET_PT_BOTH (from
, from_byte
);
1547 SET_PT_BOTH (from_byte
, from_byte
);
1550 /* We're at the start of a comment. */
1556 if (! NILP (current_buffer
->enable_multibyte_characters
))
1557 SET_PT_BOTH (from
, from_byte
);
1559 SET_PT_BOTH (from_byte
, from_byte
);
1562 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1563 c
= FETCH_CHAR (from_byte
);
1564 INC_BOTH (from
, from_byte
);
1565 if (SYNTAX (c
) == Sendcomment
1566 && SYNTAX_COMMENT_STYLE (c
) == comstyle
)
1567 /* we have encountered a comment end of the same style
1568 as the comment sequence which began this comment
1571 if (SYNTAX (c
) == Scomment_fence
1572 && comstyle
== ST_COMMENT_STYLE
)
1573 /* we have encountered a comment end of the same style
1574 as the comment sequence which began this comment
1577 if (from
< stop
&& SYNTAX_COMEND_FIRST (c
)
1578 && (c1
= FETCH_CHAR (from_byte
),
1579 SYNTAX_COMEND_SECOND (c1
))
1580 && SYNTAX_COMMENT_STYLE (c
) == comstyle
)
1581 /* we have encountered a comment end of the same style
1582 as the comment sequence which began this comment
1585 INC_BOTH (from
, from_byte
);
1589 /* We have skipped one comment. */
1600 SET_PT_BOTH (BEGV
, BEGV_BYTE
);
1605 DEC_BOTH (from
, from_byte
);
1606 quoted
= char_quoted (from
, from_byte
);
1609 DEC_BOTH (from
, from_byte
);
1612 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
1613 c
= FETCH_CHAR (from_byte
);
1616 if (code
== Sendcomment
)
1617 comstyle
= SYNTAX_COMMENT_STYLE (c
);
1618 temp_pos
= from_byte
;
1620 if (from
> stop
&& SYNTAX_COMEND_SECOND (c
)
1621 && (c1
= FETCH_CHAR (temp_pos
),
1622 SYNTAX_COMEND_FIRST (c1
))
1623 && !char_quoted (from
- 1, temp_pos
))
1625 /* We must record the comment style encountered so that
1626 later, we can match only the proper comment begin
1627 sequence of the same style. */
1629 comstyle
= SYNTAX_COMMENT_STYLE (c1
);
1630 DEC_BOTH (from
, from_byte
);
1632 if (from
> stop
&& SYNTAX_COMSTART_SECOND (c
)
1633 && (c1
= FETCH_CHAR (temp_pos
),
1634 SYNTAX_COMSTART_FIRST (c1
))
1635 && !char_quoted (from
- 1, temp_pos
))
1637 /* We must record the comment style encountered so that
1638 later, we can match only the proper comment begin
1639 sequence of the same style. */
1641 DEC_BOTH (from
, from_byte
);
1644 if (code
== Scomment_fence
)
1646 /* Skip until first preceding unquoted comment_fence. */
1647 int found
= 0, ini
= from
, ini_byte
= from_byte
;
1651 DEC_BOTH (from
, from_byte
);
1654 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
1655 c
= FETCH_CHAR (from_byte
);
1656 if (SYNTAX (c
) == Scomment_fence
1657 && !char_quoted (from
, from_byte
))
1665 from
= ini
; /* Set point to ini + 1. */
1666 from_byte
= ini_byte
;
1670 else if (code
== Sendcomment
)
1672 found
= back_comment (from
, from_byte
, stop
, comstyle
,
1673 &out_charpos
, &out_bytepos
);
1675 from
= out_charpos
, from_byte
= out_bytepos
;
1676 /* We have skipped one comment. */
1679 else if (code
!= Swhitespace
&& code
!= Scomment
)
1683 INC_BOTH (from
, from_byte
);
1684 if (! NILP (current_buffer
->enable_multibyte_characters
))
1685 SET_PT_BOTH (from
, from_byte
);
1687 SET_PT_BOTH (from_byte
, from_byte
);
1695 if (! NILP (current_buffer
->enable_multibyte_characters
))
1696 SET_PT_BOTH (from
, from_byte
);
1698 SET_PT_BOTH (from_byte
, from_byte
);
1704 scan_lists (from
, count
, depth
, sexpflag
)
1706 int count
, depth
, sexpflag
;
1709 register int stop
= count
> 0 ? ZV
: BEGV
;
1714 register enum syntaxcode code
, temp_code
;
1715 int min_depth
= depth
; /* Err out if depth gets less than this. */
1716 int comstyle
= 0; /* style of comment encountered */
1718 int last_good
= from
;
1720 int from_byte
= CHAR_TO_BYTE (from
);
1721 int out_bytepos
, out_charpos
;
1723 if (depth
> 0) min_depth
= 0;
1728 SETUP_SYNTAX_TABLE (from
, count
);
1733 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1734 c
= FETCH_CHAR (from_byte
);
1736 if (depth
== min_depth
)
1738 INC_BOTH (from
, from_byte
);
1739 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1740 if (from
< stop
&& SYNTAX_COMSTART_FIRST (c
)
1741 && SYNTAX_COMSTART_SECOND (FETCH_CHAR (from_byte
))
1742 && parse_sexp_ignore_comments
)
1744 /* we have encountered a comment start sequence and we
1745 are ignoring all text inside comments. We must record
1746 the comment style this sequence begins so that later,
1747 only a comment end of the same style actually ends
1748 the comment section */
1750 comstyle
= SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte
));
1751 INC_BOTH (from
, from_byte
);
1754 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1755 if (SYNTAX_PREFIX (c
))
1758 switch (SWITCH_ENUM_CAST (code
))
1762 if (from
== stop
) goto lose
;
1763 INC_BOTH (from
, from_byte
);
1764 /* treat following character as a word constituent */
1767 if (depth
|| !sexpflag
) break;
1768 /* This word counts as a sexp; return at end of it. */
1771 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1772 switch (SWITCH_ENUM_CAST (SYNTAX (FETCH_CHAR (from_byte
))))
1776 INC_BOTH (from
, from_byte
);
1777 if (from
== stop
) goto lose
;
1786 INC_BOTH (from
, from_byte
);
1791 case Scomment_fence
:
1792 if (!parse_sexp_ignore_comments
) break;
1801 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1802 c
= FETCH_CHAR (from_byte
);
1803 if (code
== Scomment
1804 ? (SYNTAX (c
) == Sendcomment
1805 && SYNTAX_COMMENT_STYLE (c
) == comstyle
)
1806 : (SYNTAX (c
) == Scomment_fence
))
1807 /* we have encountered a comment end of the same style
1808 as the comment sequence which began this comment
1811 INC_BOTH (from
, from_byte
);
1812 if (from
< stop
&& SYNTAX_COMEND_FIRST (c
)
1813 && SYNTAX_COMEND_SECOND (FETCH_CHAR (from_byte
))
1814 && SYNTAX_COMMENT_STYLE (c
) == comstyle
1815 && code
== Scomment
)
1816 /* we have encountered a comment end of the same style
1817 as the comment sequence which began this comment
1820 INC_BOTH (from
, from_byte
);
1829 if (from
!= stop
&& c
== FETCH_CHAR (from_byte
))
1831 INC_BOTH (from
, from_byte
);
1841 if (!++depth
) goto done
;
1846 if (!--depth
) goto done
;
1847 if (depth
< min_depth
)
1848 Fsignal (Qscan_error
,
1849 Fcons (build_string ("Containing expression ends prematurely"),
1850 Fcons (make_number (last_good
),
1851 Fcons (make_number (from
), Qnil
))));
1856 temp_pos
= from_byte
;
1858 stringterm
= FETCH_CHAR (temp_pos
);
1861 if (from
>= stop
) goto lose
;
1862 UPDATE_SYNTAX_TABLE_FORWARD (from
);
1864 ? (FETCH_CHAR (from_byte
) == stringterm
)
1865 : SYNTAX (FETCH_CHAR (from_byte
)) == Sstring_fence
)
1867 switch (SWITCH_ENUM_CAST (SYNTAX (FETCH_CHAR (from_byte
))))
1871 INC_BOTH (from
, from_byte
);
1873 INC_BOTH (from
, from_byte
);
1875 INC_BOTH (from
, from_byte
);
1876 if (!depth
&& sexpflag
) goto done
;
1881 /* Reached end of buffer. Error if within object, return nil if between */
1882 if (depth
) goto lose
;
1887 /* End of object reached */
1896 DEC_BOTH (from
, from_byte
);
1897 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
1898 if (quoted
= char_quoted (from
, from_byte
))
1900 DEC_BOTH (from
, from_byte
);
1901 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
1903 c
= FETCH_CHAR (from_byte
);
1905 if (depth
== min_depth
)
1908 if (code
== Sendcomment
)
1909 comstyle
= SYNTAX_COMMENT_STYLE (c
);
1910 temp_pos
= from_byte
;
1912 if (from
> stop
&& SYNTAX_COMEND_SECOND (c
)
1913 && (c1
= FETCH_CHAR (temp_pos
), SYNTAX_COMEND_FIRST (c1
))
1914 && !char_quoted (from
- 1, temp_pos
)
1915 && parse_sexp_ignore_comments
)
1917 /* we must record the comment style encountered so that
1918 later, we can match only the proper comment begin
1919 sequence of the same style */
1921 comstyle
= SYNTAX_COMMENT_STYLE (c1
);
1922 DEC_BOTH (from
, from_byte
);
1925 if (SYNTAX_PREFIX (c
))
1928 switch (SWITCH_ENUM_CAST (quoted
? Sword
: code
))
1932 if (depth
|| !sexpflag
) break;
1933 /* This word counts as a sexp; count object finished
1934 after passing it. */
1937 temp_pos
= from_byte
;
1939 UPDATE_SYNTAX_TABLE_BACKWARD (from
- 1);
1940 quoted
= char_quoted (from
- 1, temp_pos
);
1943 DEC_BOTH (from
, from_byte
);
1945 UPDATE_SYNTAX_TABLE_BACKWARD (from
- 1);
1947 c1
= FETCH_CHAR (temp_pos
);
1948 temp_code
= SYNTAX (c1
);
1949 if (! (quoted
|| temp_code
== Sword
1950 || temp_code
== Ssymbol
1951 || temp_code
== Squote
))
1953 DEC_BOTH (from
, from_byte
);
1960 temp_pos
= from_byte
;
1962 UPDATE_SYNTAX_TABLE_BACKWARD (from
- 1);
1963 if (from
!= stop
&& c
== FETCH_CHAR (temp_pos
))
1964 DEC_BOTH (from
, from_byte
);
1973 if (!++depth
) goto done2
;
1978 if (!--depth
) goto done2
;
1979 if (depth
< min_depth
)
1980 Fsignal (Qscan_error
,
1981 Fcons (build_string ("Containing expression ends prematurely"),
1982 Fcons (make_number (last_good
),
1983 Fcons (make_number (from
), Qnil
))));
1987 if (!parse_sexp_ignore_comments
)
1989 found
= back_comment (from
, from_byte
, stop
, comstyle
,
1990 &out_charpos
, &out_bytepos
);
1992 from
= out_charpos
, from_byte
= out_bytepos
;
1995 case Scomment_fence
:
1999 DEC_BOTH (from
, from_byte
);
2000 if (from
== stop
) goto lose
;
2001 UPDATE_SYNTAX_TABLE_BACKWARD (from
);
2002 if (!char_quoted (from
, from_byte
)
2003 && SYNTAX (FETCH_CHAR (from_byte
)) == code
)
2006 if (code
== Sstring_fence
&& !depth
&& sexpflag
) goto done2
;
2010 stringterm
= FETCH_CHAR (from_byte
);
2013 if (from
== stop
) goto lose
;
2014 temp_pos
= from_byte
;
2016 UPDATE_SYNTAX_TABLE_BACKWARD (from
- 1);
2017 if (!char_quoted (from
- 1, temp_pos
)
2018 && stringterm
== FETCH_CHAR (temp_pos
))
2020 DEC_BOTH (from
, from_byte
);
2022 DEC_BOTH (from
, from_byte
);
2023 if (!depth
&& sexpflag
) goto done2
;
2028 /* Reached start of buffer. Error if within object, return nil if between */
2029 if (depth
) goto lose
;
2040 XSETFASTINT (val
, from
);
2044 Fsignal (Qscan_error
,
2045 Fcons (build_string ("Unbalanced parentheses"),
2046 Fcons (make_number (last_good
),
2047 Fcons (make_number (from
), Qnil
))));
2052 DEFUN ("scan-lists", Fscan_lists
, Sscan_lists
, 3, 3, 0,
2053 "Scan from character number FROM by COUNT lists.\n\
2054 Returns the character number of the position thus found.\n\
2056 If DEPTH is nonzero, paren depth begins counting from that value,\n\
2057 only places where the depth in parentheses becomes zero\n\
2058 are candidates for stopping; COUNT such places are counted.\n\
2059 Thus, a positive value for DEPTH means go out levels.\n\
2061 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\
2063 If the beginning or end of (the accessible part of) the buffer is reached\n\
2064 and the depth is wrong, an error is signaled.\n\
2065 If the depth is right but the count is not used up, nil is returned.")
2066 (from
, count
, depth
)
2067 Lisp_Object from
, count
, depth
;
2069 CHECK_NUMBER (from
, 0);
2070 CHECK_NUMBER (count
, 1);
2071 CHECK_NUMBER (depth
, 2);
2073 return scan_lists (XINT (from
), XINT (count
), XINT (depth
), 0);
2076 DEFUN ("scan-sexps", Fscan_sexps
, Sscan_sexps
, 2, 2, 0,
2077 "Scan from character number FROM by COUNT balanced expressions.\n\
2078 If COUNT is negative, scan backwards.\n\
2079 Returns the character number of the position thus found.\n\
2081 Comments are ignored if `parse-sexp-ignore-comments' is non-nil.\n\
2083 If the beginning or end of (the accessible part of) the buffer is reached\n\
2084 in the middle of a parenthetical grouping, an error is signaled.\n\
2085 If the beginning or end is reached between groupings\n\
2086 but before count is used up, nil is returned.")
2088 Lisp_Object from
, count
;
2090 CHECK_NUMBER (from
, 0);
2091 CHECK_NUMBER (count
, 1);
2093 return scan_lists (XINT (from
), XINT (count
), 0, 1);
2096 DEFUN ("backward-prefix-chars", Fbackward_prefix_chars
, Sbackward_prefix_chars
,
2098 "Move point backward over any number of chars with prefix syntax.\n\
2099 This includes chars with \"quote\" or \"prefix\" syntax (' or p).")
2104 int opoint_byte
= PT_BYTE
;
2106 int pos_byte
= PT_BYTE
;
2111 SETUP_SYNTAX_TABLE (pos
, -1);
2114 DEC_BOTH (pos
, pos_byte
);
2116 while (pos
+ 1 > beg
&& !char_quoted (pos
, pos_byte
)
2117 /* Previous statement updates syntax table. */
2118 && ((c
= FETCH_CHAR (pos_byte
), SYNTAX (c
) == Squote
)
2119 || SYNTAX_PREFIX (c
)))
2121 DEC_BOTH (pos
, pos_byte
);
2124 SET_PT_BOTH (opoint
, opoint_byte
);
2129 /* Parse forward from FROM / FROM_BYTE to END,
2130 assuming that FROM has state OLDSTATE (nil means FROM is start of function),
2131 and return a description of the state of the parse at END.
2132 If STOPBEFORE is nonzero, stop at the start of an atom.
2133 If COMMENTSTOP is 1, stop at the start of a comment.
2134 If COMMENTSTOP is -1, stop at the start or end of a comment,
2135 after the beginning of a string, or after the end of a string. */
2138 scan_sexps_forward (stateptr
, from
, from_byte
, end
, targetdepth
,
2139 stopbefore
, oldstate
, commentstop
)
2140 struct lisp_parse_state
*stateptr
;
2142 int end
, targetdepth
, stopbefore
;
2143 Lisp_Object oldstate
;
2146 struct lisp_parse_state state
;
2148 register enum syntaxcode code
;
2149 struct level
{ int last
, prev
; };
2150 struct level levelstart
[100];
2151 register struct level
*curlevel
= levelstart
;
2152 struct level
*endlevel
= levelstart
+ 100;
2154 register int depth
; /* Paren depth of current scanning location.
2155 level - levelstart equals this except
2156 when the depth becomes negative. */
2157 int mindepth
; /* Lowest DEPTH value seen. */
2158 int start_quoted
= 0; /* Nonzero means starting after a char quote */
2160 int prev_from
; /* Keep one character before FROM. */
2162 int boundary_stop
= commentstop
== -1;
2166 prev_from_byte
= from_byte
;
2168 DEC_BOTH (prev_from
, prev_from_byte
);
2170 /* Use this macro instead of `from++'. */
2172 do { prev_from = from; \
2173 prev_from_byte = from_byte; \
2175 INC_POS (from_byte); \
2181 SETUP_SYNTAX_TABLE (from
, 1);
2183 if (NILP (oldstate
))
2186 state
.instring
= -1;
2187 state
.incomment
= 0;
2188 state
.comstyle
= 0; /* comment style a by default. */
2189 state
.comstr_start
= -1; /* no comment/string seen. */
2193 tem
= Fcar (oldstate
);
2199 oldstate
= Fcdr (oldstate
);
2200 oldstate
= Fcdr (oldstate
);
2201 oldstate
= Fcdr (oldstate
);
2202 tem
= Fcar (oldstate
);
2203 /* Check whether we are inside string_fence-style string: */
2204 state
.instring
= ( !NILP (tem
)
2205 ? ( INTEGERP (tem
) ? XINT (tem
) : ST_STRING_STYLE
)
2208 oldstate
= Fcdr (oldstate
);
2209 tem
= Fcar (oldstate
);
2210 state
.incomment
= !NILP (tem
);
2212 oldstate
= Fcdr (oldstate
);
2213 tem
= Fcar (oldstate
);
2214 start_quoted
= !NILP (tem
);
2216 /* if the eight element of the list is nil, we are in comment
2217 style a. If it is non-nil, we are in comment style b */
2218 oldstate
= Fcdr (oldstate
);
2219 oldstate
= Fcdr (oldstate
);
2220 tem
= Fcar (oldstate
);
2221 state
.comstyle
= NILP (tem
) ? 0 : ( EQ (tem
, Qsyntax_table
)
2222 ? ST_COMMENT_STYLE
: 1 );
2224 oldstate
= Fcdr (oldstate
);
2225 tem
= Fcar (oldstate
);
2226 state
.comstr_start
= NILP (tem
) ? -1 : XINT (tem
) ;
2231 curlevel
->prev
= -1;
2232 curlevel
->last
= -1;
2234 /* Enter the loop at a place appropriate for initial state. */
2236 if (state
.incomment
) goto startincomment
;
2237 if (state
.instring
>= 0)
2239 nofence
= state
.instring
!= ST_STRING_STYLE
;
2240 if (start_quoted
) goto startquotedinstring
;
2243 if (start_quoted
) goto startquoted
;
2247 UPDATE_SYNTAX_TABLE_FORWARD (from
);
2248 code
= SYNTAX (FETCH_CHAR (from_byte
));
2251 if (code
== Scomment
)
2252 state
.comstr_start
= prev_from
;
2253 else if (code
== Scomment_fence
)
2255 /* Record the comment style we have entered so that only
2256 the comment-end sequence of the same style actually
2257 terminates the comment section. */
2258 state
.comstyle
= ( code
== Scomment_fence
2260 : SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte
)));
2261 state
.comstr_start
= prev_from
;
2262 if (code
!= Scomment_fence
) INC_FROM
;
2265 else if (from
< end
)
2266 if (SYNTAX_COMSTART_FIRST (FETCH_CHAR (prev_from_byte
)))
2267 if (SYNTAX_COMSTART_SECOND (FETCH_CHAR (from_byte
)))
2268 /* Duplicate code to avoid a very complex if-expression
2269 which causes trouble for the SGI compiler. */
2271 /* Record the comment style we have entered so that only
2272 the comment-end sequence of the same style actually
2273 terminates the comment section. */
2274 state
.comstyle
= ( code
== Scomment_fence
2276 : SYNTAX_COMMENT_STYLE (FETCH_CHAR (from_byte
)));
2277 state
.comstr_start
= prev_from
;
2278 if (code
!= Scomment_fence
) INC_FROM
;
2282 if (SYNTAX_PREFIX (FETCH_CHAR (prev_from_byte
)))
2284 switch (SWITCH_ENUM_CAST (code
))
2288 if (stopbefore
) goto stop
; /* this arg means stop at sexp start */
2289 curlevel
->last
= prev_from
;
2291 if (from
== end
) goto endquoted
;
2294 /* treat following character as a word constituent */
2297 if (stopbefore
) goto stop
; /* this arg means stop at sexp start */
2298 curlevel
->last
= prev_from
;
2302 UPDATE_SYNTAX_TABLE_FORWARD (from
);
2303 switch (SWITCH_ENUM_CAST (SYNTAX (FETCH_CHAR (from_byte
))))
2308 if (from
== end
) goto endquoted
;
2320 curlevel
->prev
= curlevel
->last
;
2324 if (commentstop
== 1)
2328 /* Enter the loop in the middle so that we find
2329 a 2-char comment ender if we start in the middle of it. */
2330 prev
= FETCH_CHAR (prev_from_byte
);
2331 goto startincomment_1
;
2333 /* At beginning of buffer, enter the loop the ordinary way. */
2334 state
.incomment
= 1;
2338 state
.incomment
= 1;
2339 if (commentstop
|| boundary_stop
) goto done
;
2343 if (from
== end
) goto done
;
2344 UPDATE_SYNTAX_TABLE_FORWARD (from
);
2345 prev
= FETCH_CHAR (from_byte
);
2346 if (SYNTAX (prev
) == Sendcomment
2347 && SYNTAX_COMMENT_STYLE (prev
) == state
.comstyle
)
2348 /* Only terminate the comment section if the endcomment
2349 of the same style as the start sequence has been
2352 if (state
.comstyle
== ST_COMMENT_STYLE
2353 && SYNTAX (prev
) == Scomment_fence
)
2357 if (from
< end
&& SYNTAX_COMEND_FIRST (prev
)
2358 && SYNTAX_COMEND_SECOND (FETCH_CHAR (from_byte
))
2359 && SYNTAX_COMMENT_STYLE (prev
) == state
.comstyle
)
2360 /* Only terminate the comment section if the end-comment
2361 sequence of the same style as the start sequence has
2362 been encountered. */
2366 state
.incomment
= 0;
2367 state
.comstyle
= 0; /* reset the comment style */
2368 if (boundary_stop
) goto done
;
2372 if (stopbefore
) goto stop
; /* this arg means stop at sexp start */
2374 /* curlevel++->last ran into compiler bug on Apollo */
2375 curlevel
->last
= prev_from
;
2376 if (++curlevel
== endlevel
)
2377 error ("Nesting too deep for parser");
2378 curlevel
->prev
= -1;
2379 curlevel
->last
= -1;
2380 if (targetdepth
== depth
) goto done
;
2385 if (depth
< mindepth
)
2387 if (curlevel
!= levelstart
)
2389 curlevel
->prev
= curlevel
->last
;
2390 if (targetdepth
== depth
) goto done
;
2395 state
.comstr_start
= from
- 1;
2396 if (stopbefore
) goto stop
; /* this arg means stop at sexp start */
2397 curlevel
->last
= prev_from
;
2398 state
.instring
= (code
== Sstring
2399 ? (FETCH_CHAR (prev_from_byte
))
2401 if (boundary_stop
) goto done
;
2404 nofence
= state
.instring
!= ST_STRING_STYLE
;
2410 if (from
>= end
) goto done
;
2411 c
= FETCH_CHAR (from_byte
);
2412 if (nofence
&& c
== state
.instring
) break;
2413 UPDATE_SYNTAX_TABLE_FORWARD (from
);
2414 switch (SWITCH_ENUM_CAST (SYNTAX (c
)))
2417 if (!nofence
) goto string_end
;
2422 startquotedinstring
:
2423 if (from
>= end
) goto endquoted
;
2429 state
.instring
= -1;
2430 curlevel
->prev
= curlevel
->last
;
2432 if (boundary_stop
) goto done
;
2441 stop
: /* Here if stopping before start of sexp. */
2442 from
= prev_from
; /* We have just fetched the char that starts it; */
2443 goto done
; /* but return the position before it. */
2448 state
.depth
= depth
;
2449 state
.mindepth
= mindepth
;
2450 state
.thislevelstart
= curlevel
->prev
;
2451 state
.prevlevelstart
2452 = (curlevel
== levelstart
) ? -1 : (curlevel
- 1)->last
;
2453 state
.location
= from
;
2459 /* This comment supplies the doc string for parse-partial-sexp,
2460 for make-docfile to see. We cannot put this in the real DEFUN
2461 due to limits in the Unix cpp.
2463 DEFUN ("parse-partial-sexp", Ffoo, Sfoo, 2, 6, 0,
2464 "Parse Lisp syntax starting at FROM until TO; return status of parse at TO.\n\
2465 Parsing stops at TO or when certain criteria are met;\n\
2466 point is set to where parsing stops.\n\
2467 If fifth arg STATE is omitted or nil,\n\
2468 parsing assumes that FROM is the beginning of a function.\n\
2469 Value is a list of nine elements describing final state of parsing:\n\
2470 0. depth in parens.\n\
2471 1. character address of start of innermost containing list; nil if none.\n\
2472 2. character address of start of last complete sexp terminated.\n\
2473 3. non-nil if inside a string.\n\
2474 (it is the character that will terminate the string,\n\
2475 or t if the string should be terminated by a generic string delimiter.)\n\
2476 4. t if inside a comment.\n\
2477 5. t if following a quote character.\n\
2478 6. the minimum paren-depth encountered during this scan.\n\
2479 7. t if in a comment of style b; `syntax-table' if the comment\n\
2480 should be terminated by a generic comment delimiter.\n\
2481 8. character address of start of comment or string; nil if not in one.\n\
2482 If third arg TARGETDEPTH is non-nil, parsing stops if the depth\n\
2483 in parentheses becomes equal to TARGETDEPTH.\n\
2484 Fourth arg STOPBEFORE non-nil means stop when come to\n\
2485 any character that starts a sexp.\n\
2486 Fifth arg STATE is a nine-element list like what this function returns.\n\
2487 It is used to initialize the state of the parse. Elements number 1, 2, 6\n\
2488 and 8 are ignored; you can leave off element 8 (the last) entirely.\n\
2489 Sixth arg COMMENTSTOP non-nil means stop at the start of a comment.\n\
2490 If it is `syntax-table', stop after the start of a comment or a string,\n\
2491 or after end of a comment or a string.")
2492 (from, to, targetdepth, stopbefore, state, commentstop)
2495 DEFUN ("parse-partial-sexp", Fparse_partial_sexp
, Sparse_partial_sexp
, 2, 6, 0,
2496 0 /* See immediately above */)
2497 (from
, to
, targetdepth
, stopbefore
, oldstate
, commentstop
)
2498 Lisp_Object from
, to
, targetdepth
, stopbefore
, oldstate
, commentstop
;
2500 struct lisp_parse_state state
;
2503 if (!NILP (targetdepth
))
2505 CHECK_NUMBER (targetdepth
, 3);
2506 target
= XINT (targetdepth
);
2509 target
= -100000; /* We won't reach this depth */
2511 validate_region (&from
, &to
);
2512 scan_sexps_forward (&state
, XINT (from
), CHAR_TO_BYTE (XINT (from
)),
2514 target
, !NILP (stopbefore
), oldstate
,
2516 ? 0 : (EQ (commentstop
, Qsyntax_table
) ? -1 : 1)));
2518 SET_PT (state
.location
);
2520 return Fcons (make_number (state
.depth
),
2521 Fcons (state
.prevlevelstart
< 0 ? Qnil
: make_number (state
.prevlevelstart
),
2522 Fcons (state
.thislevelstart
< 0 ? Qnil
: make_number (state
.thislevelstart
),
2523 Fcons (state
.instring
>= 0
2524 ? (state
.instring
== ST_STRING_STYLE
2525 ? Qt
: make_number (state
.instring
)) : Qnil
,
2526 Fcons (state
.incomment
? Qt
: Qnil
,
2527 Fcons (state
.quoted
? Qt
: Qnil
,
2528 Fcons (make_number (state
.mindepth
),
2529 Fcons ((state
.comstyle
2530 ? (state
.comstyle
== ST_COMMENT_STYLE
2531 ? Qsyntax_table
: Qt
) :
2533 Fcons ((state
.incomment
|| state
.instring
2534 ? make_number (state
.comstr_start
)
2544 /* This has to be done here, before we call Fmake_char_table. */
2545 Qsyntax_table
= intern ("syntax-table");
2546 staticpro (&Qsyntax_table
);
2548 /* Intern this now in case it isn't already done.
2549 Setting this variable twice is harmless.
2550 But don't staticpro it here--that is done in alloc.c. */
2551 Qchar_table_extra_slots
= intern ("char-table-extra-slots");
2553 /* Create objects which can be shared among syntax tables. */
2554 Vsyntax_code_object
= Fmake_vector (make_number (13), Qnil
);
2555 for (i
= 0; i
< XVECTOR (Vsyntax_code_object
)->size
; i
++)
2556 XVECTOR (Vsyntax_code_object
)->contents
[i
]
2557 = Fcons (make_number (i
), Qnil
);
2559 /* Now we are ready to set up this property, so we can
2560 create syntax tables. */
2561 Fput (Qsyntax_table
, Qchar_table_extra_slots
, make_number (0));
2563 temp
= XVECTOR (Vsyntax_code_object
)->contents
[(int) Swhitespace
];
2565 Vstandard_syntax_table
= Fmake_char_table (Qsyntax_table
, temp
);
2567 temp
= XVECTOR (Vsyntax_code_object
)->contents
[(int) Sword
];
2568 for (i
= 'a'; i
<= 'z'; i
++)
2569 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, i
, temp
);
2570 for (i
= 'A'; i
<= 'Z'; i
++)
2571 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, i
, temp
);
2572 for (i
= '0'; i
<= '9'; i
++)
2573 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, i
, temp
);
2575 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '$', temp
);
2576 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '%', temp
);
2578 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '(',
2579 Fcons (make_number (Sopen
), make_number (')')));
2580 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, ')',
2581 Fcons (make_number (Sclose
), make_number ('(')));
2582 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '[',
2583 Fcons (make_number (Sopen
), make_number (']')));
2584 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, ']',
2585 Fcons (make_number (Sclose
), make_number ('[')));
2586 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '{',
2587 Fcons (make_number (Sopen
), make_number ('}')));
2588 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '}',
2589 Fcons (make_number (Sclose
), make_number ('{')));
2590 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '"',
2591 Fcons (make_number ((int) Sstring
), Qnil
));
2592 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, '\\',
2593 Fcons (make_number ((int) Sescape
), Qnil
));
2595 temp
= XVECTOR (Vsyntax_code_object
)->contents
[(int) Ssymbol
];
2596 for (i
= 0; i
< 10; i
++)
2598 c
= "_-+*/&|<>="[i
];
2599 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, c
, temp
);
2602 temp
= XVECTOR (Vsyntax_code_object
)->contents
[(int) Spunct
];
2603 for (i
= 0; i
< 12; i
++)
2605 c
= ".,;:?!#@~^'`"[i
];
2606 SET_RAW_SYNTAX_ENTRY (Vstandard_syntax_table
, c
, temp
);
2612 Qsyntax_table_p
= intern ("syntax-table-p");
2613 staticpro (&Qsyntax_table_p
);
2615 staticpro (&Vsyntax_code_object
);
2617 Qscan_error
= intern ("scan-error");
2618 staticpro (&Qscan_error
);
2619 Fput (Qscan_error
, Qerror_conditions
,
2620 Fcons (Qerror
, Qnil
));
2621 Fput (Qscan_error
, Qerror_message
,
2622 build_string ("Scan error"));
2624 DEFVAR_BOOL ("parse-sexp-ignore-comments", &parse_sexp_ignore_comments
,
2625 "Non-nil means `forward-sexp', etc., should treat comments as whitespace.");
2627 DEFVAR_BOOL ("parse-sexp-lookup-properties", &parse_sexp_lookup_properties
,
2628 "Non-nil means `forward-sexp', etc., grant `syntax-table' property.\n\
2629 The value of this property should be either a syntax table, or a cons\n\
2630 of the form (SYNTAXCODE . MATCHCHAR), SYNTAXCODE being the numeric\n\
2631 syntax code, MATCHCHAR being nil or the character to match (which is\n\
2632 relevant only for open/close type.");
2634 words_include_escapes
= 0;
2635 DEFVAR_BOOL ("words-include-escapes", &words_include_escapes
,
2636 "Non-nil means `forward-word', etc., should treat escape chars part of words.");
2638 defsubr (&Ssyntax_table_p
);
2639 defsubr (&Ssyntax_table
);
2640 defsubr (&Sstandard_syntax_table
);
2641 defsubr (&Scopy_syntax_table
);
2642 defsubr (&Sset_syntax_table
);
2643 defsubr (&Schar_syntax
);
2644 defsubr (&Smatching_paren
);
2645 defsubr (&Smodify_syntax_entry
);
2646 defsubr (&Sdescribe_syntax
);
2648 defsubr (&Sforward_word
);
2650 defsubr (&Sskip_chars_forward
);
2651 defsubr (&Sskip_chars_backward
);
2652 defsubr (&Sskip_syntax_forward
);
2653 defsubr (&Sskip_syntax_backward
);
2655 defsubr (&Sforward_comment
);
2656 defsubr (&Sscan_lists
);
2657 defsubr (&Sscan_sexps
);
2658 defsubr (&Sbackward_prefix_chars
);
2659 defsubr (&Sparse_partial_sexp
);