|
0
|
1 /* Definitions for data structures and routines for the regular |
|
|
2 expression library, version 0.11. |
|
|
3 |
|
|
4 Copyright (C) 1985, 89, 90, 91, 92 Free Software Foundation, Inc. |
|
|
5 |
|
|
6 This program is free software; you can redistribute it and/or modify |
|
|
7 it under the terms of the GNU General Public License as published by |
|
|
8 the Free Software Foundation; either version 2, or (at your option) |
|
|
9 any later version. |
|
|
10 |
|
|
11 This program is distributed in the hope that it will be useful, |
|
|
12 but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
|
14 GNU General Public License for more details. |
|
|
15 |
|
|
16 You should have received a copy of the GNU General Public License |
|
|
17 along with this program; if not, write to the Free Software |
|
|
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
|
|
19 |
|
|
20 #ifndef __REGEXP_LIBRARY_H__ |
|
|
21 #define __REGEXP_LIBRARY_H__ |
|
|
22 |
|
|
23 /* POSIX says that <sys/types.h> must be included before <regex.h>. */ |
|
|
24 |
|
|
25 /* The following bits are used to determine the regexp syntax we |
|
|
26 recognize. The set/not-set meanings are chosen so that Emacs syntax |
|
|
27 remains the value 0. The bits are given in alphabetical order, and |
|
|
28 the definitions shifted by one from the previous bit; thus, when we |
|
|
29 add or remove a bit, only one other definition need change. */ |
|
|
30 typedef unsigned reg_syntax_t; |
|
|
31 |
|
|
32 /* If this bit is not set, then \ inside a bracket expression is literal. |
|
|
33 If set, then such a \ quotes the following character. */ |
|
|
34 #define RE_BACKSLASH_ESCAPE_IN_LISTS (1) |
|
|
35 |
|
|
36 /* If this bit is not set, then + and ? are operators, and \+ and \? are |
|
|
37 literals. |
|
|
38 If set, then \+ and \? are operators and + and ? are literals. */ |
|
|
39 #define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1) |
|
|
40 |
|
|
41 /* If this bit is set, then character classes are supported. They are: |
|
|
42 [:alpha:], [:upper:], [:lower:], [:digit:], [:alnum:], [:xdigit:], |
|
|
43 [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:]. |
|
|
44 If not set, then character classes are not supported. */ |
|
|
45 #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1) |
|
|
46 |
|
|
47 /* If this bit is set, then ^ and $ are always anchors (outside bracket |
|
|
48 expressions, of course). |
|
|
49 If this bit is not set, then it depends: |
|
|
50 ^ is an anchor if it is at the beginning of a regular |
|
|
51 expression or after an open-group or an alternation operator; |
|
|
52 $ is an anchor if it is at the end of a regular expression, or |
|
|
53 before a close-group or an alternation operator. |
|
|
54 |
|
|
55 This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because |
|
|
56 POSIX draft 11.2 says that * etc. in leading positions is undefined. |
|
|
57 We already implemented a previous draft which made those constructs |
|
|
58 invalid, though, so we haven't changed the code back. */ |
|
|
59 #define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1) |
|
|
60 |
|
|
61 /* If this bit is set, then special characters are always special |
|
|
62 regardless of where they are in the pattern. |
|
|
63 If this bit is not set, then special characters are special only in |
|
|
64 some contexts; otherwise they are ordinary. Specifically, |
|
|
65 * + ? and intervals are only special when not after the beginning, |
|
|
66 open-group, or alternation operator. */ |
|
|
67 #define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1) |
|
|
68 |
|
|
69 /* If this bit is set, then *, +, ?, and { cannot be first in an re or |
|
|
70 immediately after an alternation or begin-group operator. */ |
|
|
71 #define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1) |
|
|
72 |
|
|
73 /* If this bit is set, then . matches newline. |
|
|
74 If not set, then it doesn't. */ |
|
|
75 #define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1) |
|
|
76 |
|
|
77 /* If this bit is set, then . doesn't match NUL. |
|
|
78 If not set, then it does. */ |
|
|
79 #define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1) |
|
|
80 |
|
|
81 /* If this bit is set, nonmatching lists [^...] do not match newline. |
|
|
82 If not set, they do. */ |
|
|
83 #define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1) |
|
|
84 |
|
|
85 /* If this bit is set, either \{...\} or {...} defines an |
|
|
86 interval, depending on RE_NO_BK_BRACES. |
|
|
87 If not set, \{, \}, {, and } are literals. */ |
|
|
88 #define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1) |
|
|
89 |
|
|
90 /* If this bit is set, +, ? and | aren't recognized as operators. |
|
|
91 If not set, they are. */ |
|
|
92 #define RE_LIMITED_OPS (RE_INTERVALS << 1) |
|
|
93 |
|
|
94 /* If this bit is set, newline is an alternation operator. |
|
|
95 If not set, newline is literal. */ |
|
|
96 #define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1) |
|
|
97 |
|
|
98 /* If this bit is set, then `{...}' defines an interval, and \{ and \} |
|
|
99 are literals. |
|
|
100 If not set, then `\{...\}' defines an interval. */ |
|
|
101 #define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1) |
|
|
102 |
|
|
103 /* If this bit is set, (...) defines a group, and \( and \) are literals. |
|
|
104 If not set, \(...\) defines a group, and ( and ) are literals. */ |
|
|
105 #define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1) |
|
|
106 |
|
|
107 /* If this bit is set, then \<digit> matches <digit>. |
|
|
108 If not set, then \<digit> is a back-reference. */ |
|
|
109 #define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1) |
|
|
110 |
|
|
111 /* If this bit is set, then | is an alternation operator, and \| is literal. |
|
|
112 If not set, then \| is an alternation operator, and | is literal. */ |
|
|
113 #define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1) |
|
|
114 |
|
|
115 /* If this bit is set, then an ending range point collating higher |
|
|
116 than the starting range point, as in [z-a], is invalid. |
|
|
117 If not set, then when ending range point collates higher than the |
|
|
118 starting range point, the range is ignored. */ |
|
|
119 #define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1) |
|
|
120 |
|
|
121 /* If this bit is set, then an unmatched ) is ordinary. |
|
|
122 If not set, then an unmatched ) is invalid. */ |
|
|
123 #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1) |
|
|
124 |
|
|
125 /* This global variable defines the particular regexp syntax to use (for |
|
|
126 some interfaces). When a regexp is compiled, the syntax used is |
|
|
127 stored in the pattern buffer, so changing this does not affect |
|
|
128 already-compiled regexps. */ |
|
|
129 extern reg_syntax_t re_syntax_options; |
|
|
130 |
|
|
131 /* Define combinations of the above bits for the standard possibilities. |
|
|
132 (The [[[ comments delimit what gets put into the Texinfo file, so |
|
|
133 don't delete them!) */ |
|
|
134 /* [[[begin syntaxes]]] */ |
|
|
135 #define RE_SYNTAX_EMACS 0 |
|
|
136 |
|
|
137 #define RE_SYNTAX_AWK \ |
|
|
138 (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL \ |
|
|
139 | RE_NO_BK_PARENS | RE_NO_BK_REFS \ |
|
|
140 | RE_NO_BK_VAR | RE_NO_EMPTY_RANGES \ |
|
|
141 | RE_UNMATCHED_RIGHT_PAREN_ORD) |
|
|
142 |
|
|
143 #define RE_SYNTAX_POSIX_AWK \ |
|
|
144 (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS) |
|
|
145 |
|
|
146 #define RE_SYNTAX_GREP \ |
|
|
147 (RE_BK_PLUS_QM | RE_CHAR_CLASSES \ |
|
|
148 | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \ |
|
|
149 | RE_NEWLINE_ALT) |
|
|
150 |
|
|
151 #define RE_SYNTAX_EGREP \ |
|
|
152 (RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \ |
|
|
153 | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \ |
|
|
154 | RE_NEWLINE_ALT | RE_NO_BK_PARENS \ |
|
|
155 | RE_NO_BK_VBAR) |
|
|
156 |
|
|
157 #define RE_SYNTAX_POSIX_EGREP \ |
|
|
158 (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES) |
|
|
159 |
|
|
160 #define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC |
|
|
161 |
|
|
162 /* Syntax bits common to both basic and extended POSIX regex syntax. */ |
|
|
163 #define _RE_SYNTAX_POSIX_COMMON \ |
|
|
164 (RE_CHAR_CLASSES | RE_DOT_NEWLINE | RE_DOT_NOT_NULL \ |
|
|
165 | RE_INTERVALS | RE_NO_EMPTY_RANGES) |
|
|
166 |
|
|
167 #define RE_SYNTAX_POSIX_BASIC \ |
|
|
168 (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM) |
|
|
169 |
|
|
170 /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes |
|
|
171 RE_LIMITED_OPS, i.e., \? \+ \| are not recognized. Actually, this |
|
|
172 isn't minimal, since other operators, such as \`, aren't disabled. */ |
|
|
173 #define RE_SYNTAX_POSIX_MINIMAL_BASIC \ |
|
|
174 (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS) |
|
|
175 |
|
|
176 #define RE_SYNTAX_POSIX_EXTENDED \ |
|
|
177 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ |
|
|
178 | RE_CONTEXT_INDEP_OPS | RE_NO_BK_BRACES \ |
|
|
179 | RE_NO_BK_PARENS | RE_NO_BK_VBAR \ |
|
|
180 | RE_UNMATCHED_RIGHT_PAREN_ORD) |
|
|
181 |
|
|
182 /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INVALID_OPS |
|
|
183 replaces RE_CONTEXT_INDEP_OPS and RE_NO_BK_REFS is added. */ |
|
|
184 #define RE_SYNTAX_POSIX_MINIMAL_EXTENDED \ |
|
|
185 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ |
|
|
186 | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES \ |
|
|
187 | RE_NO_BK_PARENS | RE_NO_BK_REFS \ |
|
|
188 | RE_NO_BK_VBAR | RE_UNMATCHED_RIGHT_PAREN_ORD) |
|
|
189 /* [[[end syntaxes]]] */ |
|
|
190 |
|
|
191 /* Maximum number of duplicates an interval can allow. Some systems |
|
|
192 (erroneously) define this in other header files, but we want our |
|
|
193 value, so remove any previous define. */ |
|
|
194 #ifdef RE_DUP_MAX |
|
|
195 #undef RE_DUP_MAX |
|
|
196 #endif |
|
|
197 #define RE_DUP_MAX ((1 << 15) - 1) |
|
|
198 |
|
|
199 |
|
|
200 /* POSIX `cflags' bits (i.e., information for `regcomp'). */ |
|
|
201 |
|
|
202 /* If this bit is set, then use extended regular expression syntax. |
|
|
203 If not set, then use basic regular expression syntax. */ |
|
|
204 #define REG_EXTENDED 1 |
|
|
205 |
|
|
206 /* If this bit is set, then ignore case when matching. |
|
|
207 If not set, then case is significant. */ |
|
|
208 #define REG_ICASE (REG_EXTENDED << 1) |
|
|
209 |
|
|
210 /* If this bit is set, then anchors do not match at newline |
|
|
211 characters in the string. |
|
|
212 If not set, then anchors do match at newlines. */ |
|
|
213 #define REG_NEWLINE (REG_ICASE << 1) |
|
|
214 |
|
|
215 /* If this bit is set, then report only success or fail in regexec. |
|
|
216 If not set, then returns differ between not matching and errors. */ |
|
|
217 #define REG_NOSUB (REG_NEWLINE << 1) |
|
|
218 |
|
|
219 |
|
|
220 /* POSIX `eflags' bits (i.e., information for regexec). */ |
|
|
221 |
|
|
222 /* If this bit is set, then the beginning-of-line operator doesn't match |
|
|
223 the beginning of the string (presumably because it's not the |
|
|
224 beginning of a line). |
|
|
225 If not set, then the beginning-of-line operator does match the |
|
|
226 beginning of the string. */ |
|
|
227 #define REG_NOTBOL 1 |
|
|
228 |
|
|
229 /* Like REG_NOTBOL, except for the end-of-line. */ |
|
|
230 #define REG_NOTEOL (1 << 1) |
|
|
231 |
|
|
232 |
|
|
233 /* If any error codes are removed, changed, or added, update the |
|
|
234 `re_error_msg' table in regex.c. */ |
|
|
235 typedef enum |
|
|
236 { |
|
|
237 REG_NOERROR = 0, /* Success. */ |
|
|
238 REG_NOMATCH, /* Didn't find a match (for regexec). */ |
|
|
239 |
|
|
240 /* POSIX regcomp return error codes. (In the order listed in the |
|
|
241 standard.) */ |
|
|
242 REG_BADPAT, /* Invalid pattern. */ |
|
|
243 REG_ECOLLATE, /* Not implemented. */ |
|
|
244 REG_ECTYPE, /* Invalid character class name. */ |
|
|
245 REG_EESCAPE, /* Trailing backslash. */ |
|
|
246 REG_ESUBREG, /* Invalid back reference. */ |
|
|
247 REG_EBRACK, /* Unmatched left bracket. */ |
|
|
248 REG_EPAREN, /* Parenthesis imbalance. */ |
|
|
249 REG_EBRACE, /* Unmatched \{. */ |
|
|
250 REG_BADBR, /* Invalid contents of \{\}. */ |
|
|
251 REG_ERANGE, /* Invalid range end. */ |
|
|
252 REG_ESPACE, /* Ran out of memory. */ |
|
|
253 REG_BADRPT, /* No preceding re for repetition op. */ |
|
|
254 |
|
|
255 /* Error codes we've added. */ |
|
|
256 REG_EEND, /* Premature end. */ |
|
|
257 REG_ESIZE, /* Compiled pattern bigger than 2^16 bytes. */ |
|
|
258 REG_ERPAREN /* Unmatched ) or \); not returned from regcomp. */ |
|
|
259 } reg_errcode_t; |
|
|
260 |
|
|
261 /* This data structure represents a compiled pattern. Before calling |
|
|
262 the pattern compiler, the fields `buffer', `allocated', `fastmap', |
|
|
263 `translate', and `no_sub' can be set. After the pattern has been |
|
|
264 compiled, the `re_nsub' field is available. All other fields are |
|
|
265 private to the regex routines. */ |
|
|
266 |
|
|
267 struct re_pattern_buffer |
|
|
268 { |
|
|
269 /* [[[begin pattern_buffer]]] */ |
|
|
270 /* Space that holds the compiled pattern. It is declared as |
|
|
271 `unsigned char *' because its elements are |
|
|
272 sometimes used as array indexes. */ |
|
|
273 unsigned char *buffer; |
|
|
274 |
|
|
275 /* Number of bytes to which `buffer' points. */ |
|
|
276 unsigned long allocated; |
|
|
277 |
|
|
278 /* Number of bytes actually used in `buffer'. */ |
|
|
279 unsigned long used; |
|
|
280 |
|
|
281 /* Syntax setting with which the pattern was compiled. */ |
|
|
282 reg_syntax_t syntax; |
|
|
283 |
|
|
284 /* Pointer to a fastmap, if any, otherwise zero. re_search uses |
|
|
285 the fastmap, if there is one, to skip over impossible |
|
|
286 starting points for matches. */ |
|
|
287 char *fastmap; |
|
|
288 |
|
|
289 /* Either a translate table to apply to all characters before |
|
|
290 comparing them, or zero for no translation. The translation |
|
|
291 is applied to a pattern when it is compiled and to a string |
|
|
292 when it is matched. */ |
|
|
293 char *translate; |
|
|
294 |
|
|
295 /* Number of subexpressions found by the compiler. */ |
|
|
296 size_t re_nsub; |
|
|
297 |
|
|
298 /* Zero if this pattern cannot match the empty string, one else. |
|
|
299 Well, in truth it's used only in `re_search_2', to see |
|
|
300 whether or not we should use the fastmap, so we don't set |
|
|
301 this absolutely perfectly; see `re_compile_fastmap' (the |
|
|
302 `duplicate' case). */ |
|
|
303 unsigned can_be_null : 1; |
|
|
304 |
|
|
305 /* If REGS_UNALLOCATED, allocate space in the `regs' structure |
|
|
306 for `max (RE_NREGS, re_nsub + 1)' groups. |
|
|
307 If REGS_REALLOCATE, reallocate space if necessary. |
|
|
308 If REGS_FIXED, use what's there. */ |
|
|
309 #define REGS_UNALLOCATED 0 |
|
|
310 #define REGS_REALLOCATE 1 |
|
|
311 #define REGS_FIXED 2 |
|
|
312 unsigned regs_allocated : 2; |
|
|
313 |
|
|
314 /* Set to zero when regex_compile compiles a pattern; set to one |
|
|
315 by re_compile_fastmap when it updates the fastmap, if any. */ |
|
|
316 unsigned fastmap_accurate : 1; |
|
|
317 |
|
|
318 /* If set, regexec reports only success or failure and does not |
|
|
319 return anything in pmatch. */ |
|
|
320 unsigned no_sub : 1; |
|
|
321 |
|
|
322 /* If set, a beginning-of-line anchor doesn't match at the |
|
|
323 beginning of the string. */ |
|
|
324 unsigned not_bol : 1; |
|
|
325 |
|
|
326 /* Similarly for an end-of-line anchor. */ |
|
|
327 unsigned not_eol : 1; |
|
|
328 |
|
|
329 /* If true, an anchor at a newline matches. */ |
|
|
330 unsigned newline_anchor : 1; |
|
|
331 |
|
|
332 /* [[[end pattern_buffer]]] */ |
|
|
333 }; |
|
|
334 |
|
|
335 typedef struct re_pattern_buffer regex_t; |
|
|
336 |
|
|
337 |
|
|
338 /* search.c (search_buffer) in Emacs needs this one opcode value. It is |
|
|
339 defined both in `regex.c' and here. */ |
|
|
340 #define RE_EXACTN_VALUE 1 |
|
|
341 |
|
|
342 /* Type for byte offsets within the string. POSIX mandates this. */ |
|
|
343 typedef int regoff_t; |
|
|
344 |
|
|
345 |
|
|
346 /* This is the structure we store register match data in. See |
|
|
347 regex.texinfo for a full description of what registers match. */ |
|
|
348 struct re_registers |
|
|
349 { |
|
|
350 unsigned num_regs; |
|
|
351 regoff_t *start; |
|
|
352 regoff_t *end; |
|
|
353 }; |
|
|
354 |
|
|
355 |
|
|
356 /* If `regs_allocated' is REGS_UNALLOCATED in the pattern buffer, |
|
|
357 `re_match_2' returns information about at least this many registers |
|
|
358 the first time a `regs' structure is passed. */ |
|
|
359 #ifndef RE_NREGS |
|
|
360 #define RE_NREGS 30 |
|
|
361 #endif |
|
|
362 |
|
|
363 |
|
|
364 /* POSIX specification for registers. Aside from the different names than |
|
|
365 `re_registers', POSIX uses an array of structures, instead of a |
|
|
366 structure of arrays. */ |
|
|
367 typedef struct |
|
|
368 { |
|
|
369 regoff_t rm_so; /* Byte offset from string's start to substring's start. */ |
|
|
370 regoff_t rm_eo; /* Byte offset from string's start to substring's end. */ |
|
|
371 } regmatch_t; |
|
|
372 |
|
|
373 /* Declarations for routines. */ |
|
|
374 |
|
|
375 /* To avoid duplicating every routine declaration -- once with a |
|
|
376 prototype (if we are ANSI), and once without (if we aren't) -- we |
|
|
377 use the following macro to declare argument types. This |
|
|
378 unfortunately clutters up the declarations a bit, but I think it's |
|
|
379 worth it. |
|
|
380 |
|
|
381 We also have to undo `const' if we are not ANSI. */ |
|
|
382 |
|
|
383 #if __STDC__ |
|
|
384 #define _RE_ARGS(args) args |
|
|
385 #else |
|
|
386 #define _RE_ARGS(args) () |
|
|
387 #define const |
|
|
388 #endif |
|
|
389 |
|
|
390 /* Sets the current default syntax to SYNTAX, and return the old syntax. |
|
|
391 You can also simply assign to the `re_syntax_options' variable. */ |
|
|
392 extern reg_syntax_t re_set_syntax _RE_ARGS ((reg_syntax_t syntax)); |
|
|
393 |
|
|
394 /* Compile the regular expression PATTERN, with length LENGTH |
|
|
395 and syntax given by the global `re_syntax_options', into the buffer |
|
|
396 BUFFER. Return NULL if successful, and an error string if not. */ |
|
|
397 extern const char *re_compile_pattern |
|
|
398 _RE_ARGS ((const char *pattern, int length, |
|
|
399 struct re_pattern_buffer *buffer)); |
|
|
400 |
|
|
401 |
|
|
402 /* Compile a fastmap for the compiled pattern in BUFFER; used to |
|
|
403 accelerate searches. Return 0 if successful and -2 if was an |
|
|
404 internal error. */ |
|
|
405 extern int re_compile_fastmap _RE_ARGS ((struct re_pattern_buffer *buffer)); |
|
|
406 |
|
|
407 |
|
|
408 /* Search in the string STRING (with length LENGTH) for the pattern |
|
|
409 compiled into BUFFER. Start searching at position START, for RANGE |
|
|
410 characters. Return the starting position of the match, -1 for no |
|
|
411 match, or -2 for an internal error. Also return register |
|
|
412 information in REGS (if REGS and BUFFER->no_sub are nonzero). */ |
|
|
413 extern int re_search |
|
|
414 _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string, |
|
|
415 int length, int start, int range, struct re_registers *regs)); |
|
|
416 |
|
|
417 |
|
|
418 /* Like `re_search', but search in the concatenation of STRING1 and |
|
|
419 STRING2. Also, stop searching at index START + STOP. */ |
|
|
420 extern int re_search_2 |
|
|
421 _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1, |
|
|
422 int length1, const char *string2, int length2, |
|
|
423 int start, int range, struct re_registers *regs, int stop)); |
|
|
424 |
|
|
425 |
|
|
426 /* Like `re_search', but return how many characters in STRING the regexp |
|
|
427 in BUFFER matched, starting at position START. */ |
|
|
428 extern int re_match |
|
|
429 _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string, |
|
|
430 int length, int start, struct re_registers *regs)); |
|
|
431 |
|
|
432 |
|
|
433 /* Relates to `re_match' as `re_search_2' relates to `re_search'. */ |
|
|
434 extern int re_match_2 |
|
|
435 _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1, |
|
|
436 int length1, const char *string2, int length2, |
|
|
437 int start, struct re_registers *regs, int stop)); |
|
|
438 |
|
|
439 |
|
|
440 /* Set REGS to hold NUM_REGS registers, storing them in STARTS and |
|
|
441 ENDS. Subsequent matches using BUFFER and REGS will use this memory |
|
|
442 for recording register information. STARTS and ENDS must be |
|
|
443 allocated with malloc, and must each be at least `NUM_REGS * sizeof |
|
|
444 (regoff_t)' bytes long. |
|
|
445 |
|
|
446 If NUM_REGS == 0, then subsequent matches should allocate their own |
|
|
447 register data. |
|
|
448 |
|
|
449 Unless this function is called, the first search or match using |
|
|
450 PATTERN_BUFFER will allocate its own register data, without |
|
|
451 freeing the old data. */ |
|
|
452 extern void re_set_registers |
|
|
453 _RE_ARGS ((struct re_pattern_buffer *buffer, struct re_registers *regs, |
|
|
454 unsigned num_regs, regoff_t *starts, regoff_t *ends)); |
|
|
455 |
|
|
456 /* 4.2 bsd compatibility. */ |
|
|
457 extern char *re_comp _RE_ARGS ((const char *)); |
|
|
458 extern int re_exec _RE_ARGS ((const char *)); |
|
|
459 |
|
|
460 /* POSIX compatibility. */ |
|
|
461 extern int regcomp _RE_ARGS ((regex_t *preg, const char *pattern, int cflags)); |
|
|
462 extern int regexec |
|
|
463 _RE_ARGS ((const regex_t *preg, const char *string, size_t nmatch, |
|
|
464 regmatch_t pmatch[], int eflags)); |
|
|
465 extern size_t regerror |
|
|
466 _RE_ARGS ((int errcode, const regex_t *preg, char *errbuf, |
|
|
467 size_t errbuf_size)); |
|
|
468 extern void regfree _RE_ARGS ((regex_t *preg)); |
|
|
469 |
|
|
470 #endif /* not __REGEXP_LIBRARY_H__ */ |
|
|
471 |
|
|
472 /* |
|
|
473 Local variables: |
|
|
474 make-backup-files: t |
|
|
475 version-control: t |
|
|
476 trim-versions-without-asking: nil |
|
|
477 End: |
|
|
478 */ |
