Mercurial > hg > xemacs-beta
annotate src/regex.h @ 5797:a1808d52a34a
If the position of a window's cached point is deleted, use buffer point instead
src/ChangeLog addition:
2014-06-17 Aidan Kehoe <kehoea@parhasard.net>
* extents.h:
* window.c:
* window.c (unshow_buffer):
* window.c (Fset_window_buffer):
Use extents, rather than markers, for the window buffer point
cache, so that when the text containing that window buffer point
is deleted, the window display code uses the buffer's actual point
instead of the position that the marker had been moved to.
Fixes Michael Heinrich's problem of
http://mid.gmane.org/6zr42uxtf5.fsf@elektra.science-computing.de ,
introduced by Ben's patch of
https://bitbucket.org/xemacs/xemacs/commits/047d37eb70d70f43803 .
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Tue, 17 Jun 2014 20:55:45 +0100 |
| parents | 3df910176b6a |
| children |
| rev | line source |
|---|---|
| 428 | 1 /* Definitions for data structures and routines for the regular |
| 2 expression library, version 0.12. | |
| 3 | |
| 4 Copyright (C) 1985, 89, 90, 91, 92, 93, 95 Free Software Foundation, Inc. | |
| 5041 | 5 Copyright (C) 2002, 2010 Ben Wing. |
| 428 | 6 |
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7 This file is part of XEmacs. |
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8 |
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9 XEmacs is free software: you can redistribute it and/or modify it |
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10 under the terms of the GNU General Public License as published by the |
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11 Free Software Foundation, either version 3 of the License, or (at your |
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12 option) any later version. |
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13 |
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT |
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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17 for more details. |
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18 |
| 428 | 19 You should have received a copy of the GNU General Public License |
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20 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 21 /* Synched up with: FSF 19.29. */ |
| 22 | |
| 440 | 23 #ifndef INCLUDED_regex_h_ |
| 24 #define INCLUDED_regex_h_ | |
| 428 | 25 |
| 446 | 26 #ifdef emacs |
| 27 #define RE_TRANSLATE_TYPE Lisp_Object | |
| 2333 | 28 #define RE_LISP_SHORT_CONTEXT_ARGS_DECL , Lisp_Object UNUSED (lispobj), struct buffer *UNUSED (lispbuf) |
| 826 | 29 #define RE_LISP_SHORT_CONTEXT_ARGS , lispobj, lispbuf |
| 30 #define RE_LISP_CONTEXT_ARGS_DECL , Lisp_Object lispobj, struct buffer *lispbuf, struct syntax_cache *scache | |
| 2333 | 31 #define RE_LISP_CONTEXT_ARGS_MULE_DECL , Lisp_Object lispobj, struct buffer *USED_IF_MULE (lispbuf), struct syntax_cache *scache |
| 826 | 32 #define RE_LISP_CONTEXT_ARGS , lispobj, lispbuf, scache |
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33 #define RE_ISWCTYPE_ARG_DECL , struct buffer *lispbuf |
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34 #define RE_ISWCTYPE_ARG(varname) , varname |
| 446 | 35 #else |
| 36 #define RE_TRANSLATE_TYPE char * | |
| 826 | 37 #define RE_LISP_SHORT_CONTEXT_ARGS_DECL |
| 38 #define RE_LISP_SHORT_CONTEXT_ARGS | |
| 39 #define RE_LISP_CONTEXT_ARGS_DECL | |
| 2333 | 40 #define RE_LISP_CONTEXT_ARGS_MULE_DECL |
| 826 | 41 #define RE_LISP_CONTEXT_ARGS |
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42 #define RE_ISWCTYPE_ARG_DECL |
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43 #define RE_ISWCTYPE_ARG(varname) |
| 665 | 44 #define Elemcount ssize_t |
| 45 #define Bytecount ssize_t | |
| 446 | 46 #endif /* emacs */ |
| 47 | |
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48 #ifndef emacs |
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49 # ifdef __cplusplus |
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50 # define BEGIN_C_DECLS extern "C" { |
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51 # define END_C_DECLS } |
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52 # else |
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53 # define BEGIN_C_DECLS |
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54 # define END_C_DECLS |
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55 # endif |
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56 #endif /* emacs */ |
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57 |
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58 BEGIN_C_DECLS |
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59 |
| 428 | 60 /* POSIX says that <sys/types.h> must be included (by the caller) before |
| 61 <regex.h>. */ | |
| 62 | |
| 63 | |
| 64 /* The following bits are used to determine the regexp syntax we | |
| 65 recognize. The not-set meaning typically corresponds to the syntax | |
| 66 used by Emacs (the exception is RE_INTERVAL, made for historical | |
| 67 reasons). The bits are given in alphabetical order, and the | |
| 68 definitions shifted by one from the previous bit; thus, when we add or | |
| 69 remove a bit, only one other definition need change. */ | |
| 70 typedef unsigned reg_syntax_t; | |
| 71 | |
| 72 /* If this bit is not set, then \ inside a bracket expression is literal. | |
| 73 If set, then such a \ quotes the following character. */ | |
| 74 #define RE_BACKSLASH_ESCAPE_IN_LISTS (1) | |
| 75 | |
| 76 /* If this bit is not set, then + and ? are operators, and \+ and \? are | |
| 77 literals. | |
| 78 If set, then \+ and \? are operators and + and ? are literals. */ | |
| 79 #define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1) | |
| 80 | |
| 81 /* If this bit is set, then character classes are supported. They are: | |
| 82 [:alpha:], [:upper:], [:lower:], [:digit:], [:alnum:], [:xdigit:], | |
| 83 [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:]. | |
| 84 If not set, then character classes are not supported. */ | |
| 85 #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1) | |
| 86 | |
| 87 /* If this bit is set, then ^ and $ are always anchors (outside bracket | |
| 88 expressions, of course). | |
| 89 If this bit is not set, then it depends: | |
| 90 ^ is an anchor if it is at the beginning of a regular | |
| 91 expression or after an open-group or an alternation operator; | |
| 92 $ is an anchor if it is at the end of a regular expression, or | |
| 93 before a close-group or an alternation operator. | |
| 94 | |
| 95 This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because | |
| 96 POSIX draft 11.2 says that * etc. in leading positions is undefined. | |
| 97 We already implemented a previous draft which made those constructs | |
| 98 invalid, though, so we haven't changed the code back. */ | |
| 99 #define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1) | |
| 100 | |
| 101 /* If this bit is set, then special characters are always special | |
| 102 regardless of where they are in the pattern. | |
| 103 If this bit is not set, then special characters are special only in | |
| 104 some contexts; otherwise they are ordinary. Specifically, | |
| 105 * + ? and intervals are only special when not after the beginning, | |
| 106 open-group, or alternation operator. */ | |
| 107 #define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1) | |
| 108 | |
| 109 /* If this bit is set, then *, +, ?, and { cannot be first in an re or | |
| 110 immediately after an alternation or begin-group operator. */ | |
| 111 #define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1) | |
| 112 | |
| 113 /* If this bit is set, then . matches newline. | |
| 114 If not set, then it doesn't. */ | |
| 115 #define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1) | |
| 116 | |
| 117 /* If this bit is set, then . doesn't match NUL. | |
| 118 If not set, then it does. */ | |
| 119 #define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1) | |
| 120 | |
| 121 /* If this bit is set, nonmatching lists [^...] do not match newline. | |
| 122 If not set, they do. */ | |
| 123 #define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1) | |
| 124 | |
| 125 /* If this bit is set, either \{...\} or {...} defines an | |
| 126 interval, depending on RE_NO_BK_BRACES. | |
| 127 If not set, \{, \}, {, and } are literals. */ | |
| 128 #define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1) | |
| 129 | |
| 130 /* If this bit is set, +, ? and | aren't recognized as operators. | |
| 131 If not set, they are. */ | |
| 132 #define RE_LIMITED_OPS (RE_INTERVALS << 1) | |
| 133 | |
| 134 /* If this bit is set, newline is an alternation operator. | |
| 135 If not set, newline is literal. */ | |
| 136 #define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1) | |
| 137 | |
| 138 /* If this bit is set, then `{...}' defines an interval, and \{ and \} | |
| 139 are literals. | |
| 140 If not set, then `\{...\}' defines an interval. */ | |
| 141 #define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1) | |
| 142 | |
| 143 /* If this bit is set, (...) defines a group, and \( and \) are literals. | |
| 144 If not set, \(...\) defines a group, and ( and ) are literals. */ | |
| 145 #define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1) | |
| 146 | |
| 147 /* If this bit is set, then \<digit> matches <digit>. | |
| 148 If not set, then \<digit> is a back-reference. */ | |
| 149 #define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1) | |
| 150 | |
| 151 /* If this bit is set, then | is an alternation operator, and \| is literal. | |
| 152 If not set, then \| is an alternation operator, and | is literal. */ | |
| 153 #define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1) | |
| 154 | |
| 155 /* If this bit is set, then an ending range point collating higher | |
| 156 than the starting range point, as in [z-a], is invalid. | |
| 157 If not set, then when ending range point collates higher than the | |
| 158 starting range point, the range is ignored. */ | |
| 159 #define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1) | |
| 160 | |
| 161 /* If this bit is not set, allow minimal matching: | |
| 162 - a*? and a+? and a?? perform shortest-possible matching (compare with a* | |
| 163 and a+ and a?, respectively, which perform longest-possible matching) | |
| 164 - other juxtaposing of * + and ? is rejected. | |
| 165 If this bit is set, consecutive * + and ?'s are collapsed in a logical | |
| 166 manner: | |
| 167 - a*? and a+? are the same as a* | |
| 168 - a?? is the same as a? | |
| 169 */ | |
| 170 #define RE_NO_MINIMAL_MATCHING (RE_NO_EMPTY_RANGES << 1) | |
| 171 | |
| 172 /* If this bit is set, succeed as soon as we match the whole pattern, | |
| 173 without further backtracking. */ | |
| 174 #define RE_NO_POSIX_BACKTRACKING (RE_NO_MINIMAL_MATCHING << 1) | |
| 175 | |
| 176 /* If this bit is not set, (?:re) behaves like (re) (or \(?:re\) behaves like | |
| 177 \(re\)) except that the matched string is not registered. */ | |
| 178 #define RE_NO_SHY_GROUPS (RE_NO_POSIX_BACKTRACKING << 1) | |
| 179 | |
| 180 /* If this bit is set, then an unmatched ) is ordinary. | |
| 181 If not set, then an unmatched ) is invalid. */ | |
| 182 #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_SHY_GROUPS << 1) | |
| 183 | |
| 502 | 184 /* If this bit is set, then \22 will read as a back reference, |
| 185 provided at least 22 non-shy groups have been seen so far. In all | |
| 186 other cases (bit not set, not 22 non-shy groups seen so far), it | |
| 187 reads as a back reference \2 followed by a digit 2. */ | |
| 188 #define RE_NO_MULTI_DIGIT_BK_REFS (RE_UNMATCHED_RIGHT_PAREN_ORD << 1) | |
| 189 | |
| 428 | 190 /* This global variable defines the particular regexp syntax to use (for |
| 191 some interfaces). When a regexp is compiled, the syntax used is | |
| 192 stored in the pattern buffer, so changing this does not affect | |
| 193 already-compiled regexps. */ | |
| 194 extern reg_syntax_t re_syntax_options; | |
| 195 | |
| 196 /* Define combinations of the above bits for the standard possibilities. | |
| 197 (The [[[ comments delimit what gets put into the Texinfo file, so | |
| 198 don't delete them!) */ | |
| 199 /* [[[begin syntaxes]]] */ | |
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200 #define RE_SYNTAX_EMACS (RE_INTERVALS | RE_CHAR_CLASSES) |
| 428 | 201 |
| 202 #define RE_SYNTAX_AWK \ | |
| 203 (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL \ | |
| 204 | RE_NO_BK_PARENS | RE_NO_BK_REFS \ | |
| 205 | RE_NO_BK_VBAR | RE_NO_EMPTY_RANGES \ | |
| 206 | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_SHY_GROUPS \ | |
| 502 | 207 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS) |
| 428 | 208 |
| 209 #define RE_SYNTAX_POSIX_AWK \ | |
| 210 (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS) | |
| 211 | |
| 212 #define RE_SYNTAX_GREP \ | |
| 213 (RE_BK_PLUS_QM | RE_CHAR_CLASSES \ | |
| 214 | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \ | |
| 215 | RE_NEWLINE_ALT | RE_NO_SHY_GROUPS \ | |
| 502 | 216 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS) |
| 428 | 217 |
| 218 #define RE_SYNTAX_EGREP \ | |
| 219 (RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \ | |
| 220 | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \ | |
| 221 | RE_NEWLINE_ALT | RE_NO_BK_PARENS \ | |
| 222 | RE_NO_BK_VBAR | RE_NO_SHY_GROUPS \ | |
| 502 | 223 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS) |
| 428 | 224 |
| 225 #define RE_SYNTAX_POSIX_EGREP \ | |
| 502 | 226 (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES | \ |
| 227 RE_NO_MULTI_DIGIT_BK_REFS) | |
| 428 | 228 |
| 229 /* P1003.2/D11.2, section 4.20.7.1, lines 5078ff. */ | |
| 230 #define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC | |
| 231 | |
| 232 #define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC | |
| 233 | |
| 234 /* Syntax bits common to both basic and extended POSIX regex syntax. */ | |
| 235 #define _RE_SYNTAX_POSIX_COMMON \ | |
| 236 (RE_CHAR_CLASSES | RE_DOT_NEWLINE | RE_DOT_NOT_NULL \ | |
| 237 | RE_INTERVALS | RE_NO_EMPTY_RANGES | RE_NO_SHY_GROUPS \ | |
| 502 | 238 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS) |
| 428 | 239 |
| 240 #define RE_SYNTAX_POSIX_BASIC \ | |
| 241 (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM) | |
| 242 | |
| 243 /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes | |
| 244 RE_LIMITED_OPS, i.e., \? \+ \| are not recognized. Actually, this | |
| 245 isn't minimal, since other operators, such as \`, aren't disabled. */ | |
| 246 #define RE_SYNTAX_POSIX_MINIMAL_BASIC \ | |
| 247 (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS) | |
| 248 | |
| 249 #define RE_SYNTAX_POSIX_EXTENDED \ | |
| 250 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ | |
| 251 | RE_CONTEXT_INDEP_OPS | RE_NO_BK_BRACES \ | |
| 252 | RE_NO_BK_PARENS | RE_NO_BK_VBAR \ | |
| 253 | RE_UNMATCHED_RIGHT_PAREN_ORD) | |
| 254 | |
| 255 /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INVALID_OPS | |
| 256 replaces RE_CONTEXT_INDEP_OPS and RE_NO_BK_REFS is added. */ | |
| 257 #define RE_SYNTAX_POSIX_MINIMAL_EXTENDED \ | |
| 258 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ | |
| 259 | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES \ | |
| 260 | RE_NO_BK_PARENS | RE_NO_BK_REFS \ | |
| 261 | RE_NO_BK_VBAR | RE_UNMATCHED_RIGHT_PAREN_ORD) | |
| 262 /* [[[end syntaxes]]] */ | |
| 263 | |
| 264 /* Maximum number of duplicates an interval can allow. Some systems | |
| 265 (erroneously) define this in other header files, but we want our | |
| 266 value, so remove any previous define. */ | |
| 267 #ifdef RE_DUP_MAX | |
| 268 #undef RE_DUP_MAX | |
| 269 #endif | |
| 270 #define RE_DUP_MAX ((1 << 15) - 1) | |
| 271 | |
| 272 | |
| 273 /* POSIX `cflags' bits (i.e., information for `regcomp'). */ | |
| 274 | |
| 275 /* If this bit is set, then use extended regular expression syntax. | |
| 276 If not set, then use basic regular expression syntax. */ | |
| 277 #define REG_EXTENDED 1 | |
| 278 | |
| 279 /* If this bit is set, then ignore case when matching. | |
| 280 If not set, then case is significant. */ | |
| 281 #define REG_ICASE (REG_EXTENDED << 1) | |
| 282 | |
| 283 /* If this bit is set, then anchors do not match at newline | |
| 284 characters in the string. | |
| 285 If not set, then anchors do match at newlines. */ | |
| 286 #define REG_NEWLINE (REG_ICASE << 1) | |
| 287 | |
| 288 /* If this bit is set, then report only success or fail in regexec. | |
| 289 If not set, then returns differ between not matching and errors. */ | |
| 290 #define REG_NOSUB (REG_NEWLINE << 1) | |
| 291 | |
| 292 | |
| 293 /* POSIX `eflags' bits (i.e., information for regexec). */ | |
| 294 | |
| 295 /* If this bit is set, then the beginning-of-line operator doesn't match | |
| 296 the beginning of the string (presumably because it's not the | |
| 297 beginning of a line). | |
| 298 If not set, then the beginning-of-line operator does match the | |
| 299 beginning of the string. */ | |
| 300 #define REG_NOTBOL 1 | |
| 301 | |
| 302 /* Like REG_NOTBOL, except for the end-of-line. */ | |
| 303 #define REG_NOTEOL (1 << 1) | |
| 304 | |
| 305 | |
| 306 /* If any error codes are removed, changed, or added, update the | |
| 307 `re_error_msg' table in regex.c. */ | |
| 308 typedef enum | |
| 309 { | |
| 310 REG_NOERROR = 0, /* Success. */ | |
| 311 REG_NOMATCH, /* Didn't find a match (for regexec). */ | |
| 312 | |
| 313 /* POSIX regcomp return error codes. (In the order listed in the | |
| 314 standard.) */ | |
| 315 REG_BADPAT, /* Invalid pattern. */ | |
| 316 REG_ECOLLATE, /* Not implemented. */ | |
| 317 REG_ECTYPE, /* Invalid character class name. */ | |
| 318 REG_EESCAPE, /* Trailing backslash. */ | |
| 319 REG_ESUBREG, /* Invalid back reference. */ | |
| 320 REG_EBRACK, /* Unmatched left bracket. */ | |
| 321 REG_EPAREN, /* Parenthesis imbalance. */ | |
| 322 REG_EBRACE, /* Unmatched \{. */ | |
| 323 REG_BADBR, /* Invalid contents of \{\}. */ | |
| 324 REG_ERANGE, /* Invalid range end. */ | |
| 325 REG_ESPACE, /* Ran out of memory. */ | |
| 326 REG_BADRPT, /* No preceding re for repetition op. */ | |
| 327 | |
| 328 /* Error codes we've added. */ | |
| 329 REG_EEND, /* Premature end. */ | |
| 330 REG_ESIZE, /* Compiled pattern bigger than 2^16 bytes. */ | |
| 331 REG_ERPAREN /* Unmatched ) or \); not returned from regcomp. */ | |
| 332 #ifdef emacs | |
| 333 ,REG_ESYNTAX /* Invalid syntax designator. */ | |
| 334 #endif | |
| 335 #ifdef MULE | |
| 336 ,REG_ERANGESPAN /* Ranges may not span charsets. */ | |
| 337 ,REG_ECATEGORY /* Invalid category designator */ | |
| 338 #endif | |
| 339 } reg_errcode_t; | |
| 340 | |
| 341 /* This data structure represents a compiled pattern. Before calling | |
| 342 the pattern compiler, the fields `buffer', `allocated', `fastmap', | |
| 343 `translate', and `no_sub' can be set. After the pattern has been | |
| 344 compiled, the `re_nsub' field is available. All other fields are | |
| 345 private to the regex routines. */ | |
| 346 | |
| 347 struct re_pattern_buffer | |
| 348 { | |
| 349 /* [[[begin pattern_buffer]]] */ | |
| 350 /* Space that holds the compiled pattern. It is declared as | |
| 351 `unsigned char *' because its elements are | |
| 352 sometimes used as array indexes. */ | |
| 353 unsigned char *buffer; | |
| 354 | |
| 355 /* Number of bytes to which `buffer' points. */ | |
| 647 | 356 long allocated; |
| 428 | 357 |
| 358 /* Number of bytes actually used in `buffer'. */ | |
| 647 | 359 long used; |
| 428 | 360 |
| 361 /* Syntax setting with which the pattern was compiled. */ | |
| 362 reg_syntax_t syntax; | |
| 363 | |
| 364 /* Pointer to a fastmap, if any, otherwise zero. re_search uses | |
| 365 the fastmap, if there is one, to skip over impossible | |
| 366 starting points for matches. */ | |
| 367 char *fastmap; | |
| 368 | |
| 369 /* Either a translate table to apply to all characters before | |
| 370 comparing them, or zero for no translation. The translation | |
| 371 is applied to a pattern when it is compiled and to a string | |
| 372 when it is matched. */ | |
| 446 | 373 RE_TRANSLATE_TYPE translate; |
| 428 | 374 |
| 2639 | 375 /* Number of subpatterns (returnable groups) found by the compiler. |
| 376 (This does not count shy groups.) */ | |
| 647 | 377 int re_nsub; |
| 428 | 378 |
| 502 | 379 /* Total number of groups found by the compiler. (Including |
| 380 shy ones.) */ | |
| 381 int re_ngroups; | |
| 382 | |
| 428 | 383 /* Zero if this pattern cannot match the empty string, one else. |
| 384 Well, in truth it's used only in `re_search_2', to see | |
| 385 whether or not we should use the fastmap, so we don't set | |
| 386 this absolutely perfectly; see `re_compile_fastmap' (the | |
| 387 `duplicate' case). */ | |
| 647 | 388 unsigned int can_be_null : 1; |
| 428 | 389 |
| 390 /* If REGS_UNALLOCATED, allocate space in the `regs' structure | |
| 391 for `max (RE_NREGS, re_nsub + 1)' groups. | |
| 392 If REGS_REALLOCATE, reallocate space if necessary. | |
| 393 If REGS_FIXED, use what's there. */ | |
| 394 #define REGS_UNALLOCATED 0 | |
| 395 #define REGS_REALLOCATE 1 | |
| 396 #define REGS_FIXED 2 | |
| 647 | 397 unsigned int regs_allocated : 2; |
| 428 | 398 |
| 399 /* Set to zero when `regex_compile' compiles a pattern; set to one | |
| 400 by `re_compile_fastmap' if it updates the fastmap. */ | |
| 647 | 401 unsigned int fastmap_accurate : 1; |
| 428 | 402 |
| 403 /* If set, `re_match_2' does not return information about | |
| 404 subexpressions. */ | |
| 647 | 405 unsigned int no_sub : 1; |
| 428 | 406 |
| 407 /* If set, a beginning-of-line anchor doesn't match at the | |
| 408 beginning of the string. */ | |
| 647 | 409 unsigned int not_bol : 1; |
| 428 | 410 |
| 411 /* Similarly for an end-of-line anchor. */ | |
| 647 | 412 unsigned int not_eol : 1; |
| 428 | 413 |
| 414 /* If true, an anchor at a newline matches. */ | |
| 647 | 415 unsigned int newline_anchor : 1; |
| 428 | 416 |
| 647 | 417 unsigned int warned_about_incompatible_back_references : 1; |
| 502 | 418 |
| 419 /* Mapping between back references and groups (may not be | |
| 420 equivalent with shy groups). */ | |
| 421 int *external_to_internal_register; | |
| 422 | |
| 423 int external_to_internal_register_size; | |
| 424 | |
| 428 | 425 /* [[[end pattern_buffer]]] */ |
| 426 }; | |
| 427 | |
| 428 typedef struct re_pattern_buffer regex_t; | |
| 429 | |
| 430 /* Type for byte offsets within the string. POSIX mandates this. */ | |
| 431 typedef int regoff_t; | |
| 432 | |
| 433 | |
| 434 /* This is the structure we store register match data in. See | |
| 435 regex.texinfo for a full description of what registers match. */ | |
| 436 struct re_registers | |
| 437 { | |
| 1468 | 438 int num_regs; /* number of registers allocated */ |
| 428 | 439 regoff_t *start; |
| 440 regoff_t *end; | |
| 441 }; | |
| 442 | |
| 443 | |
| 444 /* If `regs_allocated' is REGS_UNALLOCATED in the pattern buffer, | |
| 445 `re_match_2' returns information about at least this many registers | |
| 446 the first time a `regs' structure is passed. */ | |
| 447 #ifndef RE_NREGS | |
| 448 #define RE_NREGS 30 | |
| 449 #endif | |
| 450 | |
| 451 | |
| 452 /* POSIX specification for registers. Aside from the different names than | |
| 453 `re_registers', POSIX uses an array of structures, instead of a | |
| 454 structure of arrays. */ | |
| 455 typedef struct | |
| 456 { | |
| 457 regoff_t rm_so; /* Byte offset from string's start to substring's start. */ | |
| 458 regoff_t rm_eo; /* Byte offset from string's start to substring's end. */ | |
| 459 } regmatch_t; | |
| 460 | |
| 461 /* Declarations for routines. */ | |
| 462 | |
| 463 /* Sets the current default syntax to SYNTAX, and return the old syntax. | |
| 464 You can also simply assign to the `re_syntax_options' variable. */ | |
| 465 reg_syntax_t re_set_syntax (reg_syntax_t syntax); | |
| 466 | |
| 467 /* Compile the regular expression PATTERN, with length LENGTH | |
| 468 and syntax given by the global `re_syntax_options', into the buffer | |
| 469 BUFFER. Return NULL if successful, and an error string if not. */ | |
| 442 | 470 const char *re_compile_pattern (const char *pattern, int length, |
| 428 | 471 struct re_pattern_buffer *buffer); |
| 472 | |
| 473 | |
| 474 /* Compile a fastmap for the compiled pattern in BUFFER; used to | |
| 475 accelerate searches. Return 0 if successful and -2 if was an | |
| 476 internal error. */ | |
| 826 | 477 int re_compile_fastmap (struct re_pattern_buffer *buffer |
| 478 RE_LISP_SHORT_CONTEXT_ARGS_DECL); | |
| 428 | 479 |
| 480 | |
| 481 /* Search in the string STRING (with length LENGTH) for the pattern | |
| 482 compiled into BUFFER. Start searching at position START, for RANGE | |
| 483 characters. Return the starting position of the match, -1 for no | |
| 484 match, or -2 for an internal error. Also return register | |
| 485 information in REGS (if REGS and BUFFER->no_sub are nonzero). */ | |
| 442 | 486 int re_search (struct re_pattern_buffer *buffer, const char *string, |
| 428 | 487 int length, int start, int range, |
| 826 | 488 struct re_registers *regs RE_LISP_CONTEXT_ARGS_DECL); |
| 428 | 489 |
| 490 | |
| 491 /* Like `re_search', but search in the concatenation of STRING1 and | |
| 492 STRING2. Also, stop searching at index START + STOP. */ | |
| 442 | 493 int re_search_2 (struct re_pattern_buffer *buffer, const char *string1, |
| 494 int length1, const char *string2, int length2, int start, | |
| 826 | 495 int range, struct re_registers *regs, int stop |
| 496 RE_LISP_CONTEXT_ARGS_DECL); | |
| 428 | 497 |
| 826 | 498 #ifndef emacs /* never used by XEmacs */ |
| 428 | 499 |
| 500 /* Like `re_search', but return how many characters in STRING the regexp | |
| 501 in BUFFER matched, starting at position START. */ | |
| 442 | 502 int re_match (struct re_pattern_buffer *buffer, const char *string, |
| 826 | 503 int length, int start, struct re_registers *regs |
| 504 RE_LISP_CONTEXT_ARGS_DECL); | |
| 428 | 505 |
| 826 | 506 #endif /* not emacs */ |
| 428 | 507 |
| 508 /* Relates to `re_match' as `re_search_2' relates to `re_search'. */ | |
| 442 | 509 int re_match_2 (struct re_pattern_buffer *buffer, const char *string1, |
| 510 int length1, const char *string2, int length2, | |
| 826 | 511 int start, struct re_registers *regs, int stop |
| 512 RE_LISP_CONTEXT_ARGS_DECL); | |
| 428 | 513 |
| 514 /* Set REGS to hold NUM_REGS registers, storing them in STARTS and | |
| 515 ENDS. Subsequent matches using BUFFER and REGS will use this memory | |
| 516 for recording register information. STARTS and ENDS must be | |
| 517 allocated with malloc, and must each be at least `NUM_REGS * sizeof | |
| 518 (regoff_t)' bytes long. | |
| 519 | |
| 520 If NUM_REGS == 0, then subsequent matches should allocate their own | |
| 521 register data. | |
| 522 | |
| 523 Unless this function is called, the first search or match using | |
| 524 PATTERN_BUFFER will allocate its own register data, without | |
| 525 freeing the old data. */ | |
| 526 void re_set_registers (struct re_pattern_buffer *buffer, | |
| 647 | 527 struct re_registers *regs, int num_regs, |
| 428 | 528 regoff_t *starts, regoff_t *ends); |
| 529 | |
| 530 #ifdef _REGEX_RE_COMP | |
| 531 /* 4.2 bsd compatibility. */ | |
| 442 | 532 char *re_comp (const char *); |
| 533 int re_exec (const char *); | |
| 428 | 534 #endif |
| 535 | |
| 536 /* POSIX compatibility. */ | |
| 442 | 537 int regcomp (regex_t *preg, const char *pattern, int cflags); |
| 538 int regexec (const regex_t *preg, const char *string, size_t nmatch, | |
| 428 | 539 regmatch_t pmatch[], int eflags); |
| 442 | 540 size_t regerror (int errcode, const regex_t *preg, char *errbuf, |
| 428 | 541 size_t errbuf_size); |
| 542 void regfree (regex_t *preg); | |
| 543 | |
| 5041 | 544 enum regex_debug |
| 545 { | |
| 546 RE_DEBUG_COMPILATION = 1 << 0, | |
| 547 RE_DEBUG_FAILURE_POINT = 1 << 1, | |
| 548 RE_DEBUG_MATCHING = 1 << 2, | |
| 549 }; | |
| 550 | |
| 551 extern int debug_regexps; | |
| 552 | |
|
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553 typedef enum |
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554 { |
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555 RECC_ERROR = 0, |
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556 RECC_ALNUM, RECC_ALPHA, RECC_WORD, |
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557 RECC_GRAPH, RECC_PRINT, |
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558 RECC_LOWER, RECC_UPPER, |
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559 RECC_PUNCT, RECC_CNTRL, |
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560 RECC_DIGIT, RECC_XDIGIT, |
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561 RECC_BLANK, RECC_SPACE, |
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562 RECC_MULTIBYTE, RECC_NONASCII, |
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563 RECC_ASCII, RECC_UNIBYTE |
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564 } re_wctype_t; |
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565 |
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566 #define CHAR_CLASS_MAX_LENGTH 9 /* Namely, `multibyte'. */ |
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567 |
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568 /* Map a string to the char class it names (if any). */ |
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569 re_wctype_t re_wctype (const char *); |
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570 |
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571 /* Is character CH a member of the character class CC? */ |
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572 int re_iswctype (int ch, re_wctype_t cc RE_ISWCTYPE_ARG_DECL); |
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573 |
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574 /* Bits used to implement the multibyte-part of the various character |
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575 classes such as [:alnum:] in a charset's range table. XEmacs; use an |
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576 enum, so they're visible in the debugger. */ |
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577 enum |
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578 { |
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579 BIT_WORD = (1 << 0), |
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580 BIT_LOWER = (1 << 1), |
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581 BIT_PUNCT = (1 << 2), |
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582 BIT_SPACE = (1 << 3), |
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583 BIT_UPPER = (1 << 4), |
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584 /* XEmacs; we need this, because we unify treatment of ASCII and non-ASCII |
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585 (possible matches) in charset_mule. [:alpha:] matches all characters |
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586 with word syntax, with the exception of [0-9]. We don't need |
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587 BIT_MULTIBYTE. */ |
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588 BIT_ALPHA = (1 << 5) |
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589 }; |
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590 |
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591 #ifdef emacs |
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592 reg_errcode_t compile_char_class (re_wctype_t cc, Lisp_Object rtab, |
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593 Bitbyte *flags_out); |
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594 |
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595 #endif |
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596 |
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597 /* isalpha etc. are used for the character classes. */ |
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598 #include <ctype.h> |
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599 |
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600 #ifdef emacs |
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601 |
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602 /* 1 if C is an ASCII character. */ |
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603 #define ISASCII(c) ((c) < 0x80) |
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604 |
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605 /* 1 if C is a unibyte character. */ |
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606 #define ISUNIBYTE ISASCII |
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607 |
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608 /* The Emacs definitions should not be directly affected by locales. */ |
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609 |
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610 /* In Emacs, these are only used for single-byte characters. */ |
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611 #define ISDIGIT(c) ((c) >= '0' && (c) <= '9') |
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612 #define ISCNTRL(c) ((c) < ' ') |
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613 #define ISXDIGIT(c) (ISDIGIT (c) || ((c) >= 'a' && (c) <= 'f') \ |
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614 || ((c) >= 'A' && (c) <= 'F')) |
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615 |
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616 /* This is only used for single-byte characters. */ |
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617 #define ISBLANK(c) ((c) == ' ' || (c) == '\t') |
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618 |
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619 /* The rest must handle multibyte characters. */ |
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620 |
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621 #define ISGRAPH(c) ((c) > ' ' && (c) != 0x7f) |
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622 #define ISPRINT(c) ((c) == ' ' || ISGRAPH (c)) |
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623 #define ISALPHA(c) (ISASCII (c) ? (((c) >= 'a' && (c) <= 'z') \ |
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624 || ((c) >= 'A' && (c) <= 'Z')) \ |
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625 : ISWORD (c)) |
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626 #define ISALNUM(c) (ISALPHA (c) || ISDIGIT (c)) |
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627 |
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628 #define ISLOWER(c) LOWERCASEP (lispbuf, c) |
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629 |
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630 #define ISPUNCT(c) (ISASCII (c) \ |
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631 ? ((c) > ' ' && (c) < 0x7F \ |
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632 && !(((c) >= 'a' && (c) <= 'z') \ |
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633 || ((c) >= 'A' && (c) <= 'Z') \ |
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634 || ((c) >= '0' && (c) <= '9'))) \ |
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635 : !ISWORD (c)) |
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636 |
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637 #define ISSPACE(c) \ |
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638 (SYNTAX (BUFFER_MIRROR_SYNTAX_TABLE (lispbuf), c) == Swhitespace) |
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639 |
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640 #define ISUPPER(c) UPPERCASEP (lispbuf, c) |
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641 |
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642 #define ISWORD(c) (SYNTAX (BUFFER_MIRROR_SYNTAX_TABLE (lispbuf), c) == Sword) |
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643 |
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644 #endif |
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645 |
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646 END_C_DECLS |
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647 |
| 440 | 648 #endif /* INCLUDED_regex_h_ */ |