Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
5191 | serge | 1 | /* Definitions for data structures and routines for the regular |
2 | expression library, version 0.12. |
||
3 | |||
4 | Copyright (C) 1985, 1989, 1990, 1991, 1992, 1993, 1995, 1996, 1997, |
||
5 | 1998, 2000, 2005 Free Software Foundation, Inc. |
||
6 | |||
7 | This file is part of the GNU C Library. Its master source is NOT part of |
||
8 | the C library, however. The master source lives in /gd/gnu/lib. |
||
9 | |||
10 | The GNU C Library is free software; you can redistribute it and/or |
||
11 | modify it under the terms of the GNU Lesser General Public |
||
12 | License as published by the Free Software Foundation; either |
||
13 | version 2.1 of the License, or (at your option) any later version. |
||
14 | |||
15 | The GNU C Library is distributed in the hope that it will be useful, |
||
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||
18 | Lesser General Public License for more details. |
||
19 | |||
20 | You should have received a copy of the GNU Lesser General Public |
||
21 | License along with the GNU C Library; if not, write to the Free |
||
22 | Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
||
23 | 02110-1301 USA. */ |
||
24 | |||
25 | #ifndef _REGEX_H |
||
26 | #define _REGEX_H 1 |
||
27 | |||
28 | /* Allow the use in C++ code. */ |
||
29 | #ifdef __cplusplus |
||
30 | extern "C" { |
||
31 | #endif |
||
32 | |||
33 | /* POSIX says that |
||
34 |
|
||
35 | |||
36 | #if !defined _POSIX_C_SOURCE && !defined _POSIX_SOURCE && defined VMS |
||
37 | /* VMS doesn't have `size_t' in |
||
38 | should be there. */ |
||
39 | # include |
||
40 | #endif |
||
41 | |||
42 | /* The following two types have to be signed and unsigned integer type |
||
43 | wide enough to hold a value of a pointer. For most ANSI compilers |
||
44 | ptrdiff_t and size_t should be likely OK. Still size of these two |
||
45 | types is 2 for Microsoft C. Ugh... */ |
||
46 | typedef long int s_reg_t; |
||
47 | typedef unsigned long int active_reg_t; |
||
48 | |||
49 | /* The following bits are used to determine the regexp syntax we |
||
50 | recognize. The set/not-set meanings are chosen so that Emacs syntax |
||
51 | remains the value 0. The bits are given in alphabetical order, and |
||
52 | the definitions shifted by one from the previous bit; thus, when we |
||
53 | add or remove a bit, only one other definition need change. */ |
||
54 | typedef unsigned long int reg_syntax_t; |
||
55 | |||
56 | /* If this bit is not set, then \ inside a bracket expression is literal. |
||
57 | If set, then such a \ quotes the following character. */ |
||
58 | #define RE_BACKSLASH_ESCAPE_IN_LISTS ((unsigned long int) 1) |
||
59 | |||
60 | /* If this bit is not set, then + and ? are operators, and \+ and \? are |
||
61 | literals. |
||
62 | If set, then \+ and \? are operators and + and ? are literals. */ |
||
63 | #define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1) |
||
64 | |||
65 | /* If this bit is set, then character classes are supported. They are: |
||
66 | [:alpha:], [:upper:], [:lower:], [:digit:], [:alnum:], [:xdigit:], |
||
67 | [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:]. |
||
68 | If not set, then character classes are not supported. */ |
||
69 | #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1) |
||
70 | |||
71 | /* If this bit is set, then ^ and $ are always anchors (outside bracket |
||
72 | expressions, of course). |
||
73 | If this bit is not set, then it depends: |
||
74 | ^ is an anchor if it is at the beginning of a regular |
||
75 | expression or after an open-group or an alternation operator; |
||
76 | $ is an anchor if it is at the end of a regular expression, or |
||
77 | before a close-group or an alternation operator. |
||
78 | |||
79 | This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because |
||
80 | POSIX draft 11.2 says that * etc. in leading positions is undefined. |
||
81 | We already implemented a previous draft which made those constructs |
||
82 | invalid, though, so we haven't changed the code back. */ |
||
83 | #define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1) |
||
84 | |||
85 | /* If this bit is set, then special characters are always special |
||
86 | regardless of where they are in the pattern. |
||
87 | If this bit is not set, then special characters are special only in |
||
88 | some contexts; otherwise they are ordinary. Specifically, |
||
89 | * + ? and intervals are only special when not after the beginning, |
||
90 | open-group, or alternation operator. */ |
||
91 | #define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1) |
||
92 | |||
93 | /* If this bit is set, then *, +, ?, and { cannot be first in an re or |
||
94 | immediately after an alternation or begin-group operator. */ |
||
95 | #define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1) |
||
96 | |||
97 | /* If this bit is set, then . matches newline. |
||
98 | If not set, then it doesn't. */ |
||
99 | #define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1) |
||
100 | |||
101 | /* If this bit is set, then . doesn't match NUL. |
||
102 | If not set, then it does. */ |
||
103 | #define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1) |
||
104 | |||
105 | /* If this bit is set, nonmatching lists [^...] do not match newline. |
||
106 | If not set, they do. */ |
||
107 | #define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1) |
||
108 | |||
109 | /* If this bit is set, either \{...\} or {...} defines an |
||
110 | interval, depending on RE_NO_BK_BRACES. |
||
111 | If not set, \{, \}, {, and } are literals. */ |
||
112 | #define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1) |
||
113 | |||
114 | /* If this bit is set, +, ? and | aren't recognized as operators. |
||
115 | If not set, they are. */ |
||
116 | #define RE_LIMITED_OPS (RE_INTERVALS << 1) |
||
117 | |||
118 | /* If this bit is set, newline is an alternation operator. |
||
119 | If not set, newline is literal. */ |
||
120 | #define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1) |
||
121 | |||
122 | /* If this bit is set, then `{...}' defines an interval, and \{ and \} |
||
123 | are literals. |
||
124 | If not set, then `\{...\}' defines an interval. */ |
||
125 | #define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1) |
||
126 | |||
127 | /* If this bit is set, (...) defines a group, and \( and \) are literals. |
||
128 | If not set, \(...\) defines a group, and ( and ) are literals. */ |
||
129 | #define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1) |
||
130 | |||
131 | /* If this bit is set, then \ |
||
132 | If not set, then \ |
||
133 | #define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1) |
||
134 | |||
135 | /* If this bit is set, then | is an alternation operator, and \| is literal. |
||
136 | If not set, then \| is an alternation operator, and | is literal. */ |
||
137 | #define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1) |
||
138 | |||
139 | /* If this bit is set, then an ending range point collating higher |
||
140 | than the starting range point, as in [z-a], is invalid. |
||
141 | If not set, then when ending range point collates higher than the |
||
142 | starting range point, the range is ignored. */ |
||
143 | #define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1) |
||
144 | |||
145 | /* If this bit is set, then an unmatched ) is ordinary. |
||
146 | If not set, then an unmatched ) is invalid. */ |
||
147 | #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1) |
||
148 | |||
149 | /* If this bit is set, succeed as soon as we match the whole pattern, |
||
150 | without further backtracking. */ |
||
151 | #define RE_NO_POSIX_BACKTRACKING (RE_UNMATCHED_RIGHT_PAREN_ORD << 1) |
||
152 | |||
153 | /* If this bit is set, do not process the GNU regex operators. |
||
154 | If not set, then the GNU regex operators are recognized. */ |
||
155 | #define RE_NO_GNU_OPS (RE_NO_POSIX_BACKTRACKING << 1) |
||
156 | |||
157 | /* If this bit is set, turn on internal regex debugging. |
||
158 | If not set, and debugging was on, turn it off. |
||
159 | This only works if regex.c is compiled -DDEBUG. |
||
160 | We define this bit always, so that all that's needed to turn on |
||
161 | debugging is to recompile regex.c; the calling code can always have |
||
162 | this bit set, and it won't affect anything in the normal case. */ |
||
163 | #define RE_DEBUG (RE_NO_GNU_OPS << 1) |
||
164 | |||
165 | /* If this bit is set, a syntactically invalid interval is treated as |
||
166 | a string of ordinary characters. For example, the ERE 'a{1' is |
||
167 | treated as 'a\{1'. */ |
||
168 | #define RE_INVALID_INTERVAL_ORD (RE_DEBUG << 1) |
||
169 | |||
170 | /* This global variable defines the particular regexp syntax to use (for |
||
171 | some interfaces). When a regexp is compiled, the syntax used is |
||
172 | stored in the pattern buffer, so changing this does not affect |
||
173 | already-compiled regexps. */ |
||
174 | extern reg_syntax_t re_syntax_options; |
||
175 | |||
176 | /* Define combinations of the above bits for the standard possibilities. |
||
177 | (The [[[ comments delimit what gets put into the Texinfo file, so |
||
178 | don't delete them!) */ |
||
179 | /* [[[begin syntaxes]]] */ |
||
180 | #define RE_SYNTAX_EMACS 0 |
||
181 | |||
182 | #define RE_SYNTAX_AWK \ |
||
183 | (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL \ |
||
184 | | RE_NO_BK_PARENS | RE_NO_BK_REFS \ |
||
185 | | RE_NO_BK_VBAR | RE_NO_EMPTY_RANGES \ |
||
186 | | RE_DOT_NEWLINE | RE_CONTEXT_INDEP_ANCHORS \ |
||
187 | | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_GNU_OPS) |
||
188 | |||
189 | #define RE_SYNTAX_GNU_AWK \ |
||
190 | ((RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DEBUG) \ |
||
191 | & ~(RE_DOT_NOT_NULL | RE_INTERVALS | RE_CONTEXT_INDEP_OPS)) |
||
192 | |||
193 | #define RE_SYNTAX_POSIX_AWK \ |
||
194 | (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS \ |
||
195 | | RE_INTERVALS | RE_NO_GNU_OPS) |
||
196 | |||
197 | #define RE_SYNTAX_GREP \ |
||
198 | (RE_BK_PLUS_QM | RE_CHAR_CLASSES \ |
||
199 | | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \ |
||
200 | | RE_NEWLINE_ALT) |
||
201 | |||
202 | #define RE_SYNTAX_EGREP \ |
||
203 | (RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \ |
||
204 | | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \ |
||
205 | | RE_NEWLINE_ALT | RE_NO_BK_PARENS \ |
||
206 | | RE_NO_BK_VBAR) |
||
207 | |||
208 | #define RE_SYNTAX_POSIX_EGREP \ |
||
209 | (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES \ |
||
210 | | RE_INVALID_INTERVAL_ORD) |
||
211 | |||
212 | /* P1003.2/D11.2, section 4.20.7.1, lines 5078ff. */ |
||
213 | #define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC |
||
214 | |||
215 | #define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC |
||
216 | |||
217 | /* Syntax bits common to both basic and extended POSIX regex syntax. */ |
||
218 | #define _RE_SYNTAX_POSIX_COMMON \ |
||
219 | (RE_CHAR_CLASSES | RE_DOT_NEWLINE | RE_DOT_NOT_NULL \ |
||
220 | | RE_INTERVALS | RE_NO_EMPTY_RANGES) |
||
221 | |||
222 | #define RE_SYNTAX_POSIX_BASIC \ |
||
223 | (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM) |
||
224 | |||
225 | /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes |
||
226 | RE_LIMITED_OPS, i.e., \? \+ \| are not recognized. Actually, this |
||
227 | isn't minimal, since other operators, such as \`, aren't disabled. */ |
||
228 | #define RE_SYNTAX_POSIX_MINIMAL_BASIC \ |
||
229 | (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS) |
||
230 | |||
231 | #define RE_SYNTAX_POSIX_EXTENDED \ |
||
232 | (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ |
||
233 | | RE_CONTEXT_INDEP_OPS | RE_NO_BK_BRACES \ |
||
234 | | RE_NO_BK_PARENS | RE_NO_BK_VBAR \ |
||
235 | | RE_CONTEXT_INVALID_OPS | RE_UNMATCHED_RIGHT_PAREN_ORD) |
||
236 | |||
237 | /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INDEP_OPS is |
||
238 | removed and RE_NO_BK_REFS is added. */ |
||
239 | #define RE_SYNTAX_POSIX_MINIMAL_EXTENDED \ |
||
240 | (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ |
||
241 | | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES \ |
||
242 | | RE_NO_BK_PARENS | RE_NO_BK_REFS \ |
||
243 | | RE_NO_BK_VBAR | RE_UNMATCHED_RIGHT_PAREN_ORD) |
||
244 | /* [[[end syntaxes]]] */ |
||
245 | |||
246 | /* Maximum number of duplicates an interval can allow. Some systems |
||
247 | (erroneously) define this in other header files, but we want our |
||
248 | value, so remove any previous define. */ |
||
249 | #ifdef RE_DUP_MAX |
||
250 | # undef RE_DUP_MAX |
||
251 | #endif |
||
252 | /* If sizeof(int) == 2, then ((1 << 15) - 1) overflows. */ |
||
253 | #define RE_DUP_MAX (0x7fff) |
||
254 | |||
255 | |||
256 | /* POSIX `cflags' bits (i.e., information for `regcomp'). */ |
||
257 | |||
258 | /* If this bit is set, then use extended regular expression syntax. |
||
259 | If not set, then use basic regular expression syntax. */ |
||
260 | #define REG_EXTENDED 1 |
||
261 | |||
262 | /* If this bit is set, then ignore case when matching. |
||
263 | If not set, then case is significant. */ |
||
264 | #define REG_ICASE (REG_EXTENDED << 1) |
||
265 | |||
266 | /* If this bit is set, then anchors do not match at newline |
||
267 | characters in the string. |
||
268 | If not set, then anchors do match at newlines. */ |
||
269 | #define REG_NEWLINE (REG_ICASE << 1) |
||
270 | |||
271 | /* If this bit is set, then report only success or fail in regexec. |
||
272 | If not set, then returns differ between not matching and errors. */ |
||
273 | #define REG_NOSUB (REG_NEWLINE << 1) |
||
274 | |||
275 | |||
276 | /* POSIX `eflags' bits (i.e., information for regexec). */ |
||
277 | |||
278 | /* If this bit is set, then the beginning-of-line operator doesn't match |
||
279 | the beginning of the string (presumably because it's not the |
||
280 | beginning of a line). |
||
281 | If not set, then the beginning-of-line operator does match the |
||
282 | beginning of the string. */ |
||
283 | #define REG_NOTBOL 1 |
||
284 | |||
285 | /* Like REG_NOTBOL, except for the end-of-line. */ |
||
286 | #define REG_NOTEOL (1 << 1) |
||
287 | |||
288 | |||
289 | /* If any error codes are removed, changed, or added, update the |
||
290 | `re_error_msg' table in regex.c. */ |
||
291 | typedef enum |
||
292 | { |
||
293 | #ifdef _XOPEN_SOURCE |
||
294 | REG_ENOSYS = -1, /* This will never happen for this implementation. */ |
||
295 | #endif |
||
296 | |||
297 | REG_NOERROR = 0, /* Success. */ |
||
298 | REG_NOMATCH, /* Didn't find a match (for regexec). */ |
||
299 | |||
300 | /* POSIX regcomp return error codes. (In the order listed in the |
||
301 | standard.) */ |
||
302 | REG_BADPAT, /* Invalid pattern. */ |
||
303 | REG_ECOLLATE, /* Not implemented. */ |
||
304 | REG_ECTYPE, /* Invalid character class name. */ |
||
305 | REG_EESCAPE, /* Trailing backslash. */ |
||
306 | REG_ESUBREG, /* Invalid back reference. */ |
||
307 | REG_EBRACK, /* Unmatched left bracket. */ |
||
308 | REG_EPAREN, /* Parenthesis imbalance. */ |
||
309 | REG_EBRACE, /* Unmatched \{. */ |
||
310 | REG_BADBR, /* Invalid contents of \{\}. */ |
||
311 | REG_ERANGE, /* Invalid range end. */ |
||
312 | REG_ESPACE, /* Ran out of memory. */ |
||
313 | REG_BADRPT, /* No preceding re for repetition op. */ |
||
314 | |||
315 | /* Error codes we've added. */ |
||
316 | REG_EEND, /* Premature end. */ |
||
317 | REG_ESIZE, /* Compiled pattern bigger than 2^16 bytes. */ |
||
318 | REG_ERPAREN /* Unmatched ) or \); not returned from regcomp. */ |
||
319 | } reg_errcode_t; |
||
320 | |||
321 | /* This data structure represents a compiled pattern. Before calling |
||
322 | the pattern compiler, the fields `buffer', `allocated', `fastmap', |
||
323 | `translate', and `no_sub' can be set. After the pattern has been |
||
324 | compiled, the `re_nsub' field is available. All other fields are |
||
325 | private to the regex routines. */ |
||
326 | |||
327 | #ifndef RE_TRANSLATE_TYPE |
||
328 | # define RE_TRANSLATE_TYPE char * |
||
329 | #endif |
||
330 | |||
331 | struct re_pattern_buffer |
||
332 | { |
||
333 | /* [[[begin pattern_buffer]]] */ |
||
334 | /* Space that holds the compiled pattern. It is declared as |
||
335 | `unsigned char *' because its elements are |
||
336 | sometimes used as array indexes. */ |
||
337 | unsigned char *buffer; |
||
338 | |||
339 | /* Number of bytes to which `buffer' points. */ |
||
340 | unsigned long int allocated; |
||
341 | |||
342 | /* Number of bytes actually used in `buffer'. */ |
||
343 | unsigned long int used; |
||
344 | |||
345 | /* Syntax setting with which the pattern was compiled. */ |
||
346 | reg_syntax_t syntax; |
||
347 | |||
348 | /* Pointer to a fastmap, if any, otherwise zero. re_search uses |
||
349 | the fastmap, if there is one, to skip over impossible |
||
350 | starting points for matches. */ |
||
351 | char *fastmap; |
||
352 | |||
353 | /* Either a translate table to apply to all characters before |
||
354 | comparing them, or zero for no translation. The translation |
||
355 | is applied to a pattern when it is compiled and to a string |
||
356 | when it is matched. */ |
||
357 | RE_TRANSLATE_TYPE translate; |
||
358 | |||
359 | /* Number of subexpressions found by the compiler. */ |
||
360 | size_t re_nsub; |
||
361 | |||
362 | /* Zero if this pattern cannot match the empty string, one else. |
||
363 | Well, in truth it's used only in `re_search_2', to see |
||
364 | whether or not we should use the fastmap, so we don't set |
||
365 | this absolutely perfectly; see `re_compile_fastmap' (the |
||
366 | `duplicate' case). */ |
||
367 | unsigned can_be_null : 1; |
||
368 | |||
369 | /* If REGS_UNALLOCATED, allocate space in the `regs' structure |
||
370 | for `max (RE_NREGS, re_nsub + 1)' groups. |
||
371 | If REGS_REALLOCATE, reallocate space if necessary. |
||
372 | If REGS_FIXED, use what's there. */ |
||
373 | #define REGS_UNALLOCATED 0 |
||
374 | #define REGS_REALLOCATE 1 |
||
375 | #define REGS_FIXED 2 |
||
376 | unsigned regs_allocated : 2; |
||
377 | |||
378 | /* Set to zero when `regex_compile' compiles a pattern; set to one |
||
379 | by `re_compile_fastmap' if it updates the fastmap. */ |
||
380 | unsigned fastmap_accurate : 1; |
||
381 | |||
382 | /* If set, `re_match_2' does not return information about |
||
383 | subexpressions. */ |
||
384 | unsigned no_sub : 1; |
||
385 | |||
386 | /* If set, a beginning-of-line anchor doesn't match at the |
||
387 | beginning of the string. */ |
||
388 | unsigned not_bol : 1; |
||
389 | |||
390 | /* Similarly for an end-of-line anchor. */ |
||
391 | unsigned not_eol : 1; |
||
392 | |||
393 | /* If true, an anchor at a newline matches. */ |
||
394 | unsigned newline_anchor : 1; |
||
395 | |||
396 | /* [[[end pattern_buffer]]] */ |
||
397 | }; |
||
398 | |||
399 | typedef struct re_pattern_buffer regex_t; |
||
400 | |||
401 | /* Type for byte offsets within the string. POSIX mandates this. */ |
||
402 | typedef int regoff_t; |
||
403 | |||
404 | |||
405 | /* This is the structure we store register match data in. See |
||
406 | regex.texinfo for a full description of what registers match. */ |
||
407 | struct re_registers |
||
408 | { |
||
409 | unsigned num_regs; |
||
410 | regoff_t *start; |
||
411 | regoff_t *end; |
||
412 | }; |
||
413 | |||
414 | |||
415 | /* If `regs_allocated' is REGS_UNALLOCATED in the pattern buffer, |
||
416 | `re_match_2' returns information about at least this many registers |
||
417 | the first time a `regs' structure is passed. */ |
||
418 | #ifndef RE_NREGS |
||
419 | # define RE_NREGS 30 |
||
420 | #endif |
||
421 | |||
422 | |||
423 | /* POSIX specification for registers. Aside from the different names than |
||
424 | `re_registers', POSIX uses an array of structures, instead of a |
||
425 | structure of arrays. */ |
||
426 | typedef struct |
||
427 | { |
||
428 | regoff_t rm_so; /* Byte offset from string's start to substring's start. */ |
||
429 | regoff_t rm_eo; /* Byte offset from string's start to substring's end. */ |
||
430 | } regmatch_t; |
||
431 | |||
432 | /* Declarations for routines. */ |
||
433 | |||
434 | /* To avoid duplicating every routine declaration -- once with a |
||
435 | prototype (if we are ANSI), and once without (if we aren't) -- we |
||
436 | use the following macro to declare argument types. This |
||
437 | unfortunately clutters up the declarations a bit, but I think it's |
||
438 | worth it. */ |
||
439 | |||
440 | /* Sets the current default syntax to SYNTAX, and return the old syntax. |
||
441 | You can also simply assign to the `re_syntax_options' variable. */ |
||
442 | extern reg_syntax_t re_set_syntax (reg_syntax_t syntax); |
||
443 | |||
444 | /* Compile the regular expression PATTERN, with length LENGTH |
||
445 | and syntax given by the global `re_syntax_options', into the buffer |
||
446 | BUFFER. Return NULL if successful, and an error string if not. */ |
||
447 | extern const char *re_compile_pattern (const char *pattern, size_t length, |
||
448 | struct re_pattern_buffer *buffer); |
||
449 | |||
450 | |||
451 | /* Compile a fastmap for the compiled pattern in BUFFER; used to |
||
452 | accelerate searches. Return 0 if successful and -2 if was an |
||
453 | internal error. */ |
||
454 | extern int re_compile_fastmap (struct re_pattern_buffer *buffer); |
||
455 | |||
456 | |||
457 | /* Search in the string STRING (with length LENGTH) for the pattern |
||
458 | compiled into BUFFER. Start searching at position START, for RANGE |
||
459 | characters. Return the starting position of the match, -1 for no |
||
460 | match, or -2 for an internal error. Also return register |
||
461 | information in REGS (if REGS and BUFFER->no_sub are nonzero). */ |
||
462 | extern int re_search (struct re_pattern_buffer *buffer, const char *string, |
||
463 | int length, int start, int range, |
||
464 | struct re_registers *regs); |
||
465 | |||
466 | |||
467 | /* Like `re_search', but search in the concatenation of STRING1 and |
||
468 | STRING2. Also, stop searching at index START + STOP. */ |
||
469 | extern int re_search_2 (struct re_pattern_buffer *buffer, const char *string1, |
||
470 | int length1, const char *string2, int length2, |
||
471 | int start, int range, struct re_registers *regs, |
||
472 | int stop); |
||
473 | |||
474 | |||
475 | /* Like `re_search', but return how many characters in STRING the regexp |
||
476 | in BUFFER matched, starting at position START. */ |
||
477 | extern int re_match (struct re_pattern_buffer *buffer, const char *string, |
||
478 | int length, int start, struct re_registers *regs); |
||
479 | |||
480 | |||
481 | /* Relates to `re_match' as `re_search_2' relates to `re_search'. */ |
||
482 | extern int re_match_2 (struct re_pattern_buffer *buffer, const char *string1, |
||
483 | int length1, const char *string2, int length2, |
||
484 | int start, struct re_registers *regs, int stop); |
||
485 | |||
486 | |||
487 | /* Set REGS to hold NUM_REGS registers, storing them in STARTS and |
||
488 | ENDS. Subsequent matches using BUFFER and REGS will use this memory |
||
489 | for recording register information. STARTS and ENDS must be |
||
490 | allocated with malloc, and must each be at least `NUM_REGS * sizeof |
||
491 | (regoff_t)' bytes long. |
||
492 | |||
493 | If NUM_REGS == 0, then subsequent matches should allocate their own |
||
494 | register data. |
||
495 | |||
496 | Unless this function is called, the first search or match using |
||
497 | PATTERN_BUFFER will allocate its own register data, without |
||
498 | freeing the old data. */ |
||
499 | extern void re_set_registers (struct re_pattern_buffer *buffer, |
||
500 | struct re_registers *regs, |
||
501 | unsigned num_regs, regoff_t *starts, |
||
502 | regoff_t *ends); |
||
503 | |||
504 | #if defined _REGEX_RE_COMP || defined _LIBC |
||
505 | # ifndef _CRAY |
||
506 | /* 4.2 bsd compatibility. */ |
||
507 | extern char *re_comp (const char *); |
||
508 | extern int re_exec (const char *); |
||
509 | # endif |
||
510 | #endif |
||
511 | |||
512 | /* GCC 2.95 and later have "__restrict"; C99 compilers have |
||
513 | "restrict", and "configure" may have defined "restrict". */ |
||
514 | #ifndef __restrict |
||
515 | # if ! (2 < __GNUC__ || (2 == __GNUC__ && 95 <= __GNUC_MINOR__)) |
||
516 | # if defined restrict || 199901L <= __STDC_VERSION__ |
||
517 | # define __restrict restrict |
||
518 | # else |
||
519 | # define __restrict |
||
520 | # endif |
||
521 | # endif |
||
522 | #endif |
||
523 | |||
524 | /* GCC 3.1 and later support declaring arrays as non-overlapping |
||
525 | using the syntax array_name[restrict] */ |
||
526 | #ifndef __restrict_arr |
||
527 | # if ! (3 < __GNUC__ || (3 == __GNUC__ && 1 <= __GNUC_MINOR__)) || defined (__GNUG__) |
||
528 | # define __restrict_arr |
||
529 | # else |
||
530 | # define __restrict_arr __restrict |
||
531 | # endif |
||
532 | #endif |
||
533 | |||
534 | /* POSIX compatibility. */ |
||
535 | extern int regcomp (regex_t *__restrict __preg, |
||
536 | const char *__restrict __pattern, |
||
537 | int __cflags); |
||
538 | |||
539 | #if (__GNUC__) |
||
540 | __extension__ |
||
541 | #endif |
||
542 | extern int regexec (const regex_t *__restrict __preg, |
||
543 | const char *__restrict __string, size_t __nmatch, |
||
544 | regmatch_t __pmatch[__restrict_arr], |
||
545 | int __eflags); |
||
546 | |||
547 | extern size_t regerror (int __errcode, const regex_t *__preg, |
||
548 | char *__errbuf, size_t __errbuf_size); |
||
549 | |||
550 | extern void regfree (regex_t *__preg); |
||
551 | |||
552 | |||
553 | #ifdef __cplusplus |
||
554 | } |
||
555 | #endif /* C++ */ |
||
556 | |||
557 | #endif /* regex.h */ |
||
558 | |||
559 | /* |
||
560 | Local variables: |
||
561 | make-backup-files: t |
||
562 | version-control: t |
||
563 | trim-versions-without-asking: nil |
||
564 | End: |
||
565 | */=>>=>=>>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><> |