| 1 | /* Declarations having to do with GNU Emacs syntax tables. |
| 2 | |
| 3 | Copyright (C) 1985, 1993-1994, 1997-1998, 2001-2011 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GNU Emacs. |
| 7 | |
| 8 | GNU Emacs is free software: you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | GNU Emacs is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | |
| 22 | extern void update_syntax_table (EMACS_INT, EMACS_INT, int, Lisp_Object); |
| 23 | |
| 24 | /* The standard syntax table is stored where it will automatically |
| 25 | be used in all new buffers. */ |
| 26 | #define Vstandard_syntax_table BVAR (&buffer_defaults, syntax_table) |
| 27 | |
| 28 | /* A syntax table is a chartable whose elements are cons cells |
| 29 | (CODE+FLAGS . MATCHING-CHAR). MATCHING-CHAR can be nil if the char |
| 30 | is not a kind of parenthesis. |
| 31 | |
| 32 | The low 8 bits of CODE+FLAGS is a code, as follows: */ |
| 33 | |
| 34 | enum syntaxcode |
| 35 | { |
| 36 | Swhitespace, /* for a whitespace character */ |
| 37 | Spunct, /* for random punctuation characters */ |
| 38 | Sword, /* for a word constituent */ |
| 39 | Ssymbol, /* symbol constituent but not word constituent */ |
| 40 | Sopen, /* for a beginning delimiter */ |
| 41 | Sclose, /* for an ending delimiter */ |
| 42 | Squote, /* for a prefix character like Lisp ' */ |
| 43 | Sstring, /* for a string-grouping character like Lisp " */ |
| 44 | Smath, /* for delimiters like $ in Tex. */ |
| 45 | Sescape, /* for a character that begins a C-style escape */ |
| 46 | Scharquote, /* for a character that quotes the following character */ |
| 47 | Scomment, /* for a comment-starting character */ |
| 48 | Sendcomment, /* for a comment-ending character */ |
| 49 | Sinherit, /* use the standard syntax table for this character */ |
| 50 | Scomment_fence, /* Starts/ends comment which is delimited on the |
| 51 | other side by any char with the same syntaxcode. */ |
| 52 | Sstring_fence, /* Starts/ends string which is delimited on the |
| 53 | other side by any char with the same syntaxcode. */ |
| 54 | Smax /* Upper bound on codes that are meaningful */ |
| 55 | }; |
| 56 | |
| 57 | /* Set the syntax entry VAL for char C in table TABLE. */ |
| 58 | |
| 59 | #define SET_RAW_SYNTAX_ENTRY(table, c, val) \ |
| 60 | CHAR_TABLE_SET ((table), c, (val)) |
| 61 | |
| 62 | /* Set the syntax entry VAL for char-range RANGE in table TABLE. |
| 63 | RANGE is a cons (FROM . TO) specifying the range of characters. */ |
| 64 | |
| 65 | #define SET_RAW_SYNTAX_ENTRY_RANGE(table, range, val) \ |
| 66 | Fset_char_table_range ((table), (range), (val)) |
| 67 | |
| 68 | /* SYNTAX_ENTRY fetches the information from the entry for character C |
| 69 | in syntax table TABLE, or from globally kept data (gl_state). |
| 70 | Does inheritance. */ |
| 71 | /* CURRENT_SYNTAX_TABLE gives the syntax table valid for current |
| 72 | position, it is either the buffer's syntax table, or syntax table |
| 73 | found in text properties. */ |
| 74 | |
| 75 | #ifdef SYNTAX_ENTRY_VIA_PROPERTY |
| 76 | # define SYNTAX_ENTRY(c) \ |
| 77 | (gl_state.use_global ? gl_state.global_code : SYNTAX_ENTRY_INT (c)) |
| 78 | # define CURRENT_SYNTAX_TABLE gl_state.current_syntax_table |
| 79 | #else |
| 80 | # define SYNTAX_ENTRY SYNTAX_ENTRY_INT |
| 81 | # define CURRENT_SYNTAX_TABLE BVAR (current_buffer, syntax_table) |
| 82 | #endif |
| 83 | |
| 84 | #define SYNTAX_ENTRY_INT(c) CHAR_TABLE_REF (CURRENT_SYNTAX_TABLE, (c)) |
| 85 | |
| 86 | /* Extract the information from the entry for character C |
| 87 | in the current syntax table. */ |
| 88 | |
| 89 | #ifdef __GNUC__ |
| 90 | #define SYNTAX(c) \ |
| 91 | ({ Lisp_Object _syntax_temp; \ |
| 92 | _syntax_temp = SYNTAX_ENTRY (c); \ |
| 93 | (CONSP (_syntax_temp) \ |
| 94 | ? (enum syntaxcode) (XINT (XCAR (_syntax_temp)) & 0xff) \ |
| 95 | : Swhitespace); }) |
| 96 | |
| 97 | #define SYNTAX_WITH_FLAGS(c) \ |
| 98 | ({ Lisp_Object _syntax_temp; \ |
| 99 | _syntax_temp = SYNTAX_ENTRY (c); \ |
| 100 | (CONSP (_syntax_temp) \ |
| 101 | ? XINT (XCAR (_syntax_temp)) \ |
| 102 | : (int) Swhitespace); }) |
| 103 | |
| 104 | #define SYNTAX_MATCH(c) \ |
| 105 | ({ Lisp_Object _syntax_temp; \ |
| 106 | _syntax_temp = SYNTAX_ENTRY (c); \ |
| 107 | (CONSP (_syntax_temp) \ |
| 108 | ? XCDR (_syntax_temp) \ |
| 109 | : Qnil); }) |
| 110 | #else |
| 111 | extern Lisp_Object syntax_temp; |
| 112 | #define SYNTAX(c) \ |
| 113 | (syntax_temp = SYNTAX_ENTRY ((c)), \ |
| 114 | (CONSP (syntax_temp) \ |
| 115 | ? (enum syntaxcode) (XINT (XCAR (syntax_temp)) & 0xff) \ |
| 116 | : Swhitespace)) |
| 117 | |
| 118 | #define SYNTAX_WITH_FLAGS(c) \ |
| 119 | (syntax_temp = SYNTAX_ENTRY ((c)), \ |
| 120 | (CONSP (syntax_temp) \ |
| 121 | ? XINT (XCAR (syntax_temp)) \ |
| 122 | : (int) Swhitespace)) |
| 123 | |
| 124 | #define SYNTAX_MATCH(c) \ |
| 125 | (syntax_temp = SYNTAX_ENTRY ((c)), \ |
| 126 | (CONSP (syntax_temp) \ |
| 127 | ? XCDR (syntax_temp) \ |
| 128 | : Qnil)) |
| 129 | #endif |
| 130 | |
| 131 | |
| 132 | /* Whether the syntax of the character C has the prefix flag set. */ |
| 133 | extern int syntax_prefix_flag_p (int c); |
| 134 | |
| 135 | /* This array, indexed by a character, contains the syntax code which that |
| 136 | character signifies (as a char). For example, |
| 137 | (enum syntaxcode) syntax_spec_code['w'] is Sword. */ |
| 138 | |
| 139 | extern unsigned char syntax_spec_code[0400]; |
| 140 | |
| 141 | /* Indexed by syntax code, give the letter that describes it. */ |
| 142 | |
| 143 | extern char syntax_code_spec[16]; |
| 144 | |
| 145 | /* Convert the byte offset BYTEPOS into a character position, |
| 146 | for the object recorded in gl_state with SETUP_SYNTAX_TABLE_FOR_OBJECT. |
| 147 | |
| 148 | The value is meant for use in the UPDATE_SYNTAX_TABLE... macros. |
| 149 | These macros do nothing when parse_sexp_lookup_properties is 0, |
| 150 | so we return 0 in that case, for speed. */ |
| 151 | |
| 152 | #define SYNTAX_TABLE_BYTE_TO_CHAR(bytepos) \ |
| 153 | (! parse_sexp_lookup_properties \ |
| 154 | ? 0 \ |
| 155 | : STRINGP (gl_state.object) \ |
| 156 | ? string_byte_to_char (gl_state.object, (bytepos)) \ |
| 157 | : BUFFERP (gl_state.object) \ |
| 158 | ? buf_bytepos_to_charpos (XBUFFER (gl_state.object), \ |
| 159 | (bytepos) + BUF_BEGV_BYTE (XBUFFER (gl_state.object)) - 1) - BUF_BEGV (XBUFFER (gl_state.object)) + 1 \ |
| 160 | : NILP (gl_state.object) \ |
| 161 | ? BYTE_TO_CHAR ((bytepos) + BEGV_BYTE - 1) - BEGV + 1 \ |
| 162 | : (bytepos)) |
| 163 | |
| 164 | /* Make syntax table state (gl_state) good for CHARPOS, assuming it is |
| 165 | currently good for a position before CHARPOS. */ |
| 166 | |
| 167 | #define UPDATE_SYNTAX_TABLE_FORWARD(charpos) \ |
| 168 | (parse_sexp_lookup_properties \ |
| 169 | && (charpos) >= gl_state.e_property \ |
| 170 | ? (update_syntax_table ((charpos) + gl_state.offset, 1, 0, \ |
| 171 | gl_state.object), \ |
| 172 | 1) \ |
| 173 | : 0) |
| 174 | |
| 175 | /* Make syntax table state (gl_state) good for CHARPOS, assuming it is |
| 176 | currently good for a position after CHARPOS. */ |
| 177 | |
| 178 | #define UPDATE_SYNTAX_TABLE_BACKWARD(charpos) \ |
| 179 | (parse_sexp_lookup_properties \ |
| 180 | && (charpos) < gl_state.b_property \ |
| 181 | ? (update_syntax_table ((charpos) + gl_state.offset, -1, 0, \ |
| 182 | gl_state.object), \ |
| 183 | 1) \ |
| 184 | : 0) |
| 185 | |
| 186 | /* Make syntax table good for CHARPOS. */ |
| 187 | |
| 188 | #define UPDATE_SYNTAX_TABLE(charpos) \ |
| 189 | (parse_sexp_lookup_properties \ |
| 190 | && (charpos) < gl_state.b_property \ |
| 191 | ? (update_syntax_table ((charpos) + gl_state.offset, -1, 0, \ |
| 192 | gl_state.object), \ |
| 193 | 1) \ |
| 194 | : (parse_sexp_lookup_properties \ |
| 195 | && (charpos) >= gl_state.e_property \ |
| 196 | ? (update_syntax_table ((charpos) + gl_state.offset, 1, 0,\ |
| 197 | gl_state.object), \ |
| 198 | 1) \ |
| 199 | : 0)) |
| 200 | |
| 201 | /* This macro sets up the buffer-global syntax table. */ |
| 202 | #define SETUP_BUFFER_SYNTAX_TABLE() \ |
| 203 | do \ |
| 204 | { \ |
| 205 | gl_state.use_global = 0; \ |
| 206 | gl_state.current_syntax_table = BVAR (current_buffer, syntax_table);\ |
| 207 | } while (0) |
| 208 | |
| 209 | /* This macro should be called with FROM at the start of forward |
| 210 | search, or after the last position of the backward search. It |
| 211 | makes sure that the first char is picked up with correct table, so |
| 212 | one does not need to call UPDATE_SYNTAX_TABLE immediately after the |
| 213 | call. |
| 214 | Sign of COUNT gives the direction of the search. |
| 215 | */ |
| 216 | |
| 217 | #define SETUP_SYNTAX_TABLE(FROM, COUNT) \ |
| 218 | do \ |
| 219 | { \ |
| 220 | SETUP_BUFFER_SYNTAX_TABLE (); \ |
| 221 | gl_state.b_property = BEGV; \ |
| 222 | gl_state.e_property = ZV + 1; \ |
| 223 | gl_state.object = Qnil; \ |
| 224 | gl_state.offset = 0; \ |
| 225 | if (parse_sexp_lookup_properties) \ |
| 226 | if ((COUNT) > 0 || (FROM) > BEGV) \ |
| 227 | update_syntax_table ((COUNT) > 0 ? (FROM) : (FROM) - 1, (COUNT),\ |
| 228 | 1, Qnil); \ |
| 229 | } \ |
| 230 | while (0) |
| 231 | |
| 232 | /* Same as above, but in OBJECT. If OBJECT is nil, use current buffer. |
| 233 | If it is t (which is only used in fast_c_string_match_ignore_case), |
| 234 | ignore properties altogether. |
| 235 | |
| 236 | This is meant for regex.c to use. For buffers, regex.c passes arguments |
| 237 | to the UPDATE_SYNTAX_TABLE macros which are relative to BEGV. |
| 238 | So if it is a buffer, we set the offset field to BEGV. */ |
| 239 | |
| 240 | #define SETUP_SYNTAX_TABLE_FOR_OBJECT(OBJECT, FROM, COUNT) \ |
| 241 | do \ |
| 242 | { \ |
| 243 | SETUP_BUFFER_SYNTAX_TABLE (); \ |
| 244 | gl_state.object = (OBJECT); \ |
| 245 | if (BUFFERP (gl_state.object)) \ |
| 246 | { \ |
| 247 | struct buffer *buf = XBUFFER (gl_state.object); \ |
| 248 | gl_state.b_property = 1; \ |
| 249 | gl_state.e_property = BUF_ZV (buf) - BUF_BEGV (buf) + 1; \ |
| 250 | gl_state.offset = BUF_BEGV (buf) - 1; \ |
| 251 | } \ |
| 252 | else if (NILP (gl_state.object)) \ |
| 253 | { \ |
| 254 | gl_state.b_property = 1; \ |
| 255 | gl_state.e_property = ZV - BEGV + 1; \ |
| 256 | gl_state.offset = BEGV - 1; \ |
| 257 | } \ |
| 258 | else if (EQ (gl_state.object, Qt)) \ |
| 259 | { \ |
| 260 | gl_state.b_property = 0; \ |
| 261 | gl_state.e_property = MOST_POSITIVE_FIXNUM; \ |
| 262 | gl_state.offset = 0; \ |
| 263 | } \ |
| 264 | else \ |
| 265 | { \ |
| 266 | gl_state.b_property = 0; \ |
| 267 | gl_state.e_property = 1 + SCHARS (gl_state.object); \ |
| 268 | gl_state.offset = 0; \ |
| 269 | } \ |
| 270 | if (parse_sexp_lookup_properties) \ |
| 271 | update_syntax_table (((FROM) + gl_state.offset \ |
| 272 | + (COUNT > 0 ? 0 : -1)), \ |
| 273 | COUNT, 1, gl_state.object); \ |
| 274 | } \ |
| 275 | while (0) |
| 276 | |
| 277 | struct gl_state_s |
| 278 | { |
| 279 | Lisp_Object object; /* The object we are scanning. */ |
| 280 | EMACS_INT start; /* Where to stop. */ |
| 281 | EMACS_INT stop; /* Where to stop. */ |
| 282 | int use_global; /* Whether to use global_code |
| 283 | or c_s_t. */ |
| 284 | Lisp_Object global_code; /* Syntax code of current char. */ |
| 285 | Lisp_Object current_syntax_table; /* Syntax table for current pos. */ |
| 286 | Lisp_Object old_prop; /* Syntax-table prop at prev pos. */ |
| 287 | EMACS_INT b_property; /* First index where c_s_t is valid. */ |
| 288 | EMACS_INT e_property; /* First index where c_s_t is |
| 289 | not valid. */ |
| 290 | INTERVAL forward_i; /* Where to start lookup on forward */ |
| 291 | INTERVAL backward_i; /* or backward movement. The |
| 292 | data in c_s_t is valid |
| 293 | between these intervals, |
| 294 | and possibly at the |
| 295 | intervals too, depending |
| 296 | on: */ |
| 297 | /* Offset for positions specified to UPDATE_SYNTAX_TABLE. */ |
| 298 | EMACS_INT offset; |
| 299 | }; |
| 300 | |
| 301 | extern struct gl_state_s gl_state; |
| 302 | extern EMACS_INT scan_words (EMACS_INT, EMACS_INT); |