1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/* Declarations having to do with GNU Emacs syntax tables.
Copyright (C) 1985, 1993, 1994 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
extern Lisp_Object Qsyntax_table_p;
extern Lisp_Object Fsyntax_table_p (), Fsyntax_table (), Fset_syntax_table ();
/* The standard syntax table is stored where it will automatically
be used in all new buffers. */
#define Vstandard_syntax_table buffer_defaults.syntax_table
/* A syntax table is a Lisp vector of length 0400, whose elements are integers.
The low 8 bits of the integer is a code, as follows:
*/
enum syntaxcode
{
Swhitespace, /* for a whitespace character */
Spunct, /* for random punctuation characters */
Sword, /* for a word constituent */
Ssymbol, /* symbol constituent but not word constituent */
Sopen, /* for a beginning delimiter */
Sclose, /* for an ending delimiter */
Squote, /* for a prefix character like Lisp ' */
Sstring, /* for a string-grouping character like Lisp " */
Smath, /* for delimiters like $ in Tex. */
Sescape, /* for a character that begins a C-style escape */
Scharquote, /* for a character that quotes the following character */
Scomment, /* for a comment-starting character */
Sendcomment, /* for a comment-ending character */
Sinherit, /* use the standard syntax table for this character */
Smax /* Upper bound on codes that are meaningful */
};
#define RAW_SYNTAX(table, c) \
((enum syntaxcode) (XINT (XVECTOR (table)->contents[(unsigned char) (c)]) & 0377))
#ifdef __GNUC__
#define SYNTAX(c) \
({ unsigned char character = c; \
enum syntaxcode syntax \
= RAW_SYNTAX (current_buffer->syntax_table, character); \
if (syntax == Sinherit) \
syntax = RAW_SYNTAX (Vstandard_syntax_table, character); \
syntax; })
#else
#define SYNTAX(c) \
(RAW_SYNTAX (current_buffer->syntax_table, c) == Sinherit \
? RAW_SYNTAX (Vstandard_syntax_table, c) \
: RAW_SYNTAX (current_buffer->syntax_table, c))
#endif
/* The next 8 bits of the number is a character,
the matching delimiter in the case of Sopen or Sclose. */
#define RAW_SYNTAX_MATCH(table, c) \
((XINT (XVECTOR (table)->contents[(unsigned char) (c)]) >> 8) & 0377)
#ifdef __GNUC__
#define SYNTAX_MATCH(c) \
({ unsigned char character = c; \
enum syntaxcode syntax \
= RAW_SYNTAX (current_buffer->syntax_table, character); \
int matcher; \
if (syntax == Sinherit) \
matcher = RAW_SYNTAX_MATCH (Vstandard_syntax_table, character); \
else \
matcher = RAW_SYNTAX_MATCH (current_buffer->syntax_table, character); \
matcher; })
#else
#define SYNTAX_MATCH(c) \
(RAW_SYNTAX (current_buffer->syntax_table, c) == Sinherit \
? RAW_SYNTAX_MATCH (Vstandard_syntax_table, c) \
: RAW_SYNTAX_MATCH (current_buffer->syntax_table, c))
#endif
/* Then there are six single-bit flags that have the following meanings:
1. This character is the first of a two-character comment-start sequence.
2. This character is the second of a two-character comment-start sequence.
3. This character is the first of a two-character comment-end sequence.
4. This character is the second of a two-character comment-end sequence.
5. This character is a prefix, for backward-prefix-chars.
Note that any two-character sequence whose first character has flag 1
and whose second character has flag 2 will be interpreted as a comment start.
bit 6 is used to discriminate between two different comment styles.
Languages such as C++ allow two orthogonal syntax start/end pairs
and bit 6 is used to determine whether a comment-end or Scommentend
ends style a or b. Comment start sequences can start style a or b.
Style a is always the default.
*/
#define SYNTAX_CHOOSE_TABLE(c) \
(RAW_SYNTAX (current_buffer->syntax_table, c) == Sinherit \
? Vstandard_syntax_table : current_buffer->syntax_table)
#ifdef __GNUC__
#define SYNTAX_COMSTART_FIRST(c) \
({ unsigned char ch = c; \
Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
(XINT (XVECTOR (table)->contents[ch]) >> 16) & 1; \
})
#define SYNTAX_COMSTART_SECOND(c) \
({ unsigned char ch = c; \
Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
(XINT (XVECTOR (table)->contents[ch]) >> 17) & 1; \
})
#define SYNTAX_COMEND_FIRST(c) \
({ unsigned char ch = c; \
Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
(XINT (XVECTOR (table)->contents[ch]) >> 18) & 1; \
})
#define SYNTAX_COMEND_SECOND(c) \
({ unsigned char ch = c; \
Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
(XINT (XVECTOR (table)->contents[ch]) >> 19) & 1; \
})
#define SYNTAX_PREFIX(c) \
({ unsigned char ch = c; \
Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
(XINT (XVECTOR (table)->contents[ch]) >> 20) & 1; \
})
/* extract the comment style bit from the syntax table entry */
#define SYNTAX_COMMENT_STYLE(c) \
({ unsigned char ch = c; \
Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
(XINT (XVECTOR (table)->contents[ch]) >> 21) & 1; \
})
#else
#define SYNTAX_COMSTART_FIRST(c) \
((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 16) & 1)
#define SYNTAX_COMSTART_SECOND(c) \
((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 17) & 1)
#define SYNTAX_COMEND_FIRST(c) \
((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 18) & 1)
#define SYNTAX_COMEND_SECOND(c) \
((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 19) & 1)
#define SYNTAX_PREFIX(c) \
((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 20) & 1)
/* extract the comment style bit from the syntax table entry */
#define SYNTAX_COMMENT_STYLE(c) \
((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 21) & 1)
#endif
/* This array, indexed by a character, contains the syntax code which that
character signifies (as a char). For example,
(enum syntaxcode) syntax_spec_code['w'] is Sword. */
extern unsigned char syntax_spec_code[0400];
/* Indexed by syntax code, give the letter that describes it. */
extern char syntax_code_spec[14];
|
