/* 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 five 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. */ #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) #define SYNTAX_PREFIX(c) \ ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 20) & 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]; /* Indexed by syntax code, give the letter that describes it. */ extern char syntax_code_spec[13];