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- /* Declarations having to do with GNU Emacs syntax tables.
- Copyright (C) 1985 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 */
- Smax /* Upper bound on codes that are meaningful */
- };
-
- #define SYNTAX(c) \
- ((enum syntaxcode) (XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) & 0377))
-
- /* The next 8 bits of the number is a character,
- the matching delimiter in the case of Sopen or Sclose. */
-
- #define SYNTAX_MATCH(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 8) & 0377)
-
- /* Then there are four 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.
- 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. */
-
- #define SYNTAX_COMSTART_FIRST(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 16) & 1)
-
- #define SYNTAX_COMSTART_SECOND(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 17) & 1)
-
- #define SYNTAX_COMEND_FIRST(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 18) & 1)
-
- #define SYNTAX_COMEND_SECOND(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 19) & 1)
-
- /* 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];
-