1 /* Declarations having to do with GNU Emacs syntax tables.
2 Copyright (C) 1985 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 extern Lisp_Object Qsyntax_table_p
;
22 extern Lisp_Object
Fsyntax_table_p (), Fsyntax_table (), Fset_syntax_table ();
24 /* The standard syntax table is stored where it will automatically
25 be used in all new buffers. */
26 #define Vstandard_syntax_table buffer_defaults.syntax_table
28 /* A syntax table is a Lisp vector of length 0400, whose elements are integers.
30 The low 8 bits of the integer is a code, as follows:
35 Swhitespace
, /* for a whitespace character */
36 Spunct
, /* for random punctuation characters */
37 Sword
, /* for a word constituent */
38 Ssymbol
, /* symbol constituent but not word constituent */
39 Sopen
, /* for a beginning delimiter */
40 Sclose
, /* for an ending delimiter */
41 Squote
, /* for a prefix character like Lisp ' */
42 Sstring
, /* for a string-grouping character like Lisp " */
43 Smath
, /* for delimiters like $ in Tex. */
44 Sescape
, /* for a character that begins a C-style escape */
45 Scharquote
, /* for a character that quotes the following character */
46 Scomment
, /* for a comment-starting character */
47 Sendcomment
, /* for a comment-ending character */
48 Smax
/* Upper bound on codes that are meaningful */
52 ((enum syntaxcode) (XINT (XVECTOR (current_buffer->syntax_table)->contents[c]) & 0377))
54 /* The next 8 bits of the number is a character,
55 the matching delimiter in the case of Sopen or Sclose. */
57 #define SYNTAX_MATCH(c) \
58 ((XINT (XVECTOR (current_buffer->syntax_table)->contents[c]) >> 8) & 0377)
60 /* Then there are five single-bit flags that have the following meanings:
61 1. This character is the first of a two-character comment-start sequence.
62 2. This character is the second of a two-character comment-start sequence.
63 3. This character is the first of a two-character comment-end sequence.
64 4. This character is the second of a two-character comment-end sequence.
65 5. This character is a prefix, for backward-prefix-chars.
66 Note that any two-character sequence whose first character has flag 1
67 and whose second character has flag 2 will be interpreted as a comment start. */
69 #define SYNTAX_COMSTART_FIRST(c) \
70 ((XINT (XVECTOR (current_buffer->syntax_table)->contents[c]) >> 16) & 1)
72 #define SYNTAX_COMSTART_SECOND(c) \
73 ((XINT (XVECTOR (current_buffer->syntax_table)->contents[c]) >> 17) & 1)
75 #define SYNTAX_COMEND_FIRST(c) \
76 ((XINT (XVECTOR (current_buffer->syntax_table)->contents[c]) >> 18) & 1)
78 #define SYNTAX_COMEND_SECOND(c) \
79 ((XINT (XVECTOR (current_buffer->syntax_table)->contents[c]) >> 19) & 1)
81 #define SYNTAX_PREFIX(c) \
82 ((XINT (XVECTOR (current_buffer->syntax_table)->contents[c]) >> 20) & 1)
84 /* This array, indexed by a character, contains the syntax code which that
85 character signifies (as a char). For example,
86 (enum syntaxcode) syntax_spec_code['w'] is Sword. */
88 extern unsigned char syntax_spec_code
[0400];
90 /* Indexed by syntax code, give the letter that describes it. */
92 extern char syntax_code_spec
[13];