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9846de1b | 1 | /* *INDENT-OFF* */ /* keep in sync with glibc */ |
c906108c SS |
2 | /* Definitions for data structures and routines for the regular |
3 | expression library, version 0.12. | |
4 | Copyright (C) 1985,89,90,91,92,93,95,96,97,98 Free Software Foundation, Inc. | |
5 | ||
6 | NOTE: The canonical source of this file is maintained with the | |
7 | GNU C Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by the | |
11 | Free Software Foundation; either version 2, or (at your option) any | |
12 | later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software Foundation, | |
21 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #ifndef _REGEX_H | |
24 | #define _REGEX_H 1 | |
25 | ||
26 | /* Allow the use in C++ code. */ | |
27 | #ifdef __cplusplus | |
28 | extern "C" { | |
29 | #endif | |
30 | ||
31 | /* POSIX says that <sys/types.h> must be included (by the caller) before | |
32 | <regex.h>. */ | |
33 | ||
34 | #if !defined _POSIX_C_SOURCE && !defined _POSIX_SOURCE && defined VMS | |
35 | /* VMS doesn't have `size_t' in <sys/types.h>, even though POSIX says it | |
36 | should be there. */ | |
37 | # include <stddef.h> | |
38 | #endif | |
39 | ||
40 | /* GDB LOCAL: define _REGEX_RE_COMP to get BSD style re_comp and re_exec */ | |
41 | #ifndef _REGEX_RE_COMP | |
42 | #define _REGEX_RE_COMP | |
43 | #endif | |
44 | ||
45 | /* The following two types have to be signed and unsigned integer type | |
46 | wide enough to hold a value of a pointer. For most ANSI compilers | |
47 | ptrdiff_t and size_t should be likely OK. Still size of these two | |
48 | types is 2 for Microsoft C. Ugh... */ | |
49 | typedef long int s_reg_t; | |
50 | typedef unsigned long int active_reg_t; | |
51 | ||
52 | /* The following bits are used to determine the regexp syntax we | |
53 | recognize. The set/not-set meanings are chosen so that Emacs syntax | |
54 | remains the value 0. The bits are given in alphabetical order, and | |
55 | the definitions shifted by one from the previous bit; thus, when we | |
56 | add or remove a bit, only one other definition need change. */ | |
57 | typedef unsigned long int reg_syntax_t; | |
58 | ||
59 | /* If this bit is not set, then \ inside a bracket expression is literal. | |
60 | If set, then such a \ quotes the following character. */ | |
61 | #define RE_BACKSLASH_ESCAPE_IN_LISTS ((unsigned long int) 1) | |
62 | ||
63 | /* If this bit is not set, then + and ? are operators, and \+ and \? are | |
64 | literals. | |
65 | If set, then \+ and \? are operators and + and ? are literals. */ | |
66 | #define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1) | |
67 | ||
68 | /* If this bit is set, then character classes are supported. They are: | |
69 | [:alpha:], [:upper:], [:lower:], [:digit:], [:alnum:], [:xdigit:], | |
70 | [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:]. | |
71 | If not set, then character classes are not supported. */ | |
72 | #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1) | |
73 | ||
74 | /* If this bit is set, then ^ and $ are always anchors (outside bracket | |
75 | expressions, of course). | |
76 | If this bit is not set, then it depends: | |
77 | ^ is an anchor if it is at the beginning of a regular | |
78 | expression or after an open-group or an alternation operator; | |
79 | $ is an anchor if it is at the end of a regular expression, or | |
80 | before a close-group or an alternation operator. | |
81 | ||
82 | This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because | |
83 | POSIX draft 11.2 says that * etc. in leading positions is undefined. | |
84 | We already implemented a previous draft which made those constructs | |
85 | invalid, though, so we haven't changed the code back. */ | |
86 | #define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1) | |
87 | ||
88 | /* If this bit is set, then special characters are always special | |
89 | regardless of where they are in the pattern. | |
90 | If this bit is not set, then special characters are special only in | |
91 | some contexts; otherwise they are ordinary. Specifically, | |
92 | * + ? and intervals are only special when not after the beginning, | |
93 | open-group, or alternation operator. */ | |
94 | #define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1) | |
95 | ||
96 | /* If this bit is set, then *, +, ?, and { cannot be first in an re or | |
97 | immediately after an alternation or begin-group operator. */ | |
98 | #define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1) | |
99 | ||
100 | /* If this bit is set, then . matches newline. | |
101 | If not set, then it doesn't. */ | |
102 | #define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1) | |
103 | ||
104 | /* If this bit is set, then . doesn't match NUL. | |
105 | If not set, then it does. */ | |
106 | #define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1) | |
107 | ||
108 | /* If this bit is set, nonmatching lists [^...] do not match newline. | |
109 | If not set, they do. */ | |
110 | #define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1) | |
111 | ||
112 | /* If this bit is set, either \{...\} or {...} defines an | |
113 | interval, depending on RE_NO_BK_BRACES. | |
114 | If not set, \{, \}, {, and } are literals. */ | |
115 | #define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1) | |
116 | ||
117 | /* If this bit is set, +, ? and | aren't recognized as operators. | |
118 | If not set, they are. */ | |
119 | #define RE_LIMITED_OPS (RE_INTERVALS << 1) | |
120 | ||
121 | /* If this bit is set, newline is an alternation operator. | |
122 | If not set, newline is literal. */ | |
123 | #define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1) | |
124 | ||
125 | /* If this bit is set, then `{...}' defines an interval, and \{ and \} | |
126 | are literals. | |
127 | If not set, then `\{...\}' defines an interval. */ | |
128 | #define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1) | |
129 | ||
130 | /* If this bit is set, (...) defines a group, and \( and \) are literals. | |
131 | If not set, \(...\) defines a group, and ( and ) are literals. */ | |
132 | #define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1) | |
133 | ||
134 | /* If this bit is set, then \<digit> matches <digit>. | |
135 | If not set, then \<digit> is a back-reference. */ | |
136 | #define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1) | |
137 | ||
138 | /* If this bit is set, then | is an alternation operator, and \| is literal. | |
139 | If not set, then \| is an alternation operator, and | is literal. */ | |
140 | #define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1) | |
141 | ||
142 | /* If this bit is set, then an ending range point collating higher | |
143 | than the starting range point, as in [z-a], is invalid. | |
144 | If not set, then when ending range point collates higher than the | |
145 | starting range point, the range is ignored. */ | |
146 | #define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1) | |
147 | ||
148 | /* If this bit is set, then an unmatched ) is ordinary. | |
149 | If not set, then an unmatched ) is invalid. */ | |
150 | #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1) | |
151 | ||
152 | /* If this bit is set, succeed as soon as we match the whole pattern, | |
153 | without further backtracking. */ | |
154 | #define RE_NO_POSIX_BACKTRACKING (RE_UNMATCHED_RIGHT_PAREN_ORD << 1) | |
155 | ||
156 | /* If this bit is set, do not process the GNU regex operators. | |
157 | If not set, then the GNU regex operators are recognized. */ | |
158 | #define RE_NO_GNU_OPS (RE_NO_POSIX_BACKTRACKING << 1) | |
159 | ||
160 | /* If this bit is set, turn on internal regex debugging. | |
161 | If not set, and debugging was on, turn it off. | |
162 | This only works if regex.c is compiled -DDEBUG. | |
163 | We define this bit always, so that all that's needed to turn on | |
164 | debugging is to recompile regex.c; the calling code can always have | |
165 | this bit set, and it won't affect anything in the normal case. */ | |
166 | #define RE_DEBUG (RE_NO_GNU_OPS << 1) | |
167 | ||
168 | /* This global variable defines the particular regexp syntax to use (for | |
169 | some interfaces). When a regexp is compiled, the syntax used is | |
170 | stored in the pattern buffer, so changing this does not affect | |
171 | already-compiled regexps. */ | |
172 | extern reg_syntax_t re_syntax_options; | |
173 | \f | |
174 | /* Define combinations of the above bits for the standard possibilities. | |
175 | (The [[[ comments delimit what gets put into the Texinfo file, so | |
176 | don't delete them!) */ | |
177 | /* [[[begin syntaxes]]] */ | |
178 | #define RE_SYNTAX_EMACS 0 | |
179 | ||
180 | #define RE_SYNTAX_AWK \ | |
181 | (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL \ | |
182 | | RE_NO_BK_PARENS | RE_NO_BK_REFS \ | |
183 | | RE_NO_BK_VBAR | RE_NO_EMPTY_RANGES \ | |
184 | | RE_DOT_NEWLINE | RE_CONTEXT_INDEP_ANCHORS \ | |
185 | | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_GNU_OPS) | |
186 | ||
187 | #define RE_SYNTAX_GNU_AWK \ | |
188 | ((RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DEBUG) \ | |
189 | & ~(RE_DOT_NOT_NULL | RE_INTERVALS | RE_CONTEXT_INDEP_OPS)) | |
190 | ||
191 | #define RE_SYNTAX_POSIX_AWK \ | |
192 | (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS \ | |
193 | | RE_INTERVALS | RE_NO_GNU_OPS) | |
194 | ||
195 | #define RE_SYNTAX_GREP \ | |
196 | (RE_BK_PLUS_QM | RE_CHAR_CLASSES \ | |
197 | | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \ | |
198 | | RE_NEWLINE_ALT) | |
199 | ||
200 | #define RE_SYNTAX_EGREP \ | |
201 | (RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \ | |
202 | | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \ | |
203 | | RE_NEWLINE_ALT | RE_NO_BK_PARENS \ | |
204 | | RE_NO_BK_VBAR) | |
205 | ||
206 | #define RE_SYNTAX_POSIX_EGREP \ | |
207 | (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES) | |
208 | ||
209 | /* P1003.2/D11.2, section 4.20.7.1, lines 5078ff. */ | |
210 | #define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC | |
211 | ||
212 | #define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC | |
213 | ||
214 | /* Syntax bits common to both basic and extended POSIX regex syntax. */ | |
215 | #define _RE_SYNTAX_POSIX_COMMON \ | |
216 | (RE_CHAR_CLASSES | RE_DOT_NEWLINE | RE_DOT_NOT_NULL \ | |
217 | | RE_INTERVALS | RE_NO_EMPTY_RANGES) | |
218 | ||
219 | #define RE_SYNTAX_POSIX_BASIC \ | |
220 | (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM) | |
221 | ||
222 | /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes | |
223 | RE_LIMITED_OPS, i.e., \? \+ \| are not recognized. Actually, this | |
224 | isn't minimal, since other operators, such as \`, aren't disabled. */ | |
225 | #define RE_SYNTAX_POSIX_MINIMAL_BASIC \ | |
226 | (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS) | |
227 | ||
228 | #define RE_SYNTAX_POSIX_EXTENDED \ | |
229 | (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ | |
230 | | RE_CONTEXT_INDEP_OPS | RE_NO_BK_BRACES \ | |
231 | | RE_NO_BK_PARENS | RE_NO_BK_VBAR \ | |
232 | | RE_UNMATCHED_RIGHT_PAREN_ORD) | |
233 | ||
234 | /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INVALID_OPS | |
235 | replaces RE_CONTEXT_INDEP_OPS and RE_NO_BK_REFS is added. */ | |
236 | #define RE_SYNTAX_POSIX_MINIMAL_EXTENDED \ | |
237 | (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \ | |
238 | | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES \ | |
239 | | RE_NO_BK_PARENS | RE_NO_BK_REFS \ | |
240 | | RE_NO_BK_VBAR | RE_UNMATCHED_RIGHT_PAREN_ORD) | |
241 | /* [[[end syntaxes]]] */ | |
242 | \f | |
243 | /* Maximum number of duplicates an interval can allow. Some systems | |
244 | (erroneously) define this in other header files, but we want our | |
245 | value, so remove any previous define. */ | |
246 | #ifdef RE_DUP_MAX | |
247 | # undef RE_DUP_MAX | |
248 | #endif | |
249 | /* If sizeof(int) == 2, then ((1 << 15) - 1) overflows. */ | |
250 | #define RE_DUP_MAX (0x7fff) | |
251 | ||
252 | ||
253 | /* POSIX `cflags' bits (i.e., information for `regcomp'). */ | |
254 | ||
255 | /* If this bit is set, then use extended regular expression syntax. | |
256 | If not set, then use basic regular expression syntax. */ | |
257 | #define REG_EXTENDED 1 | |
258 | ||
259 | /* If this bit is set, then ignore case when matching. | |
260 | If not set, then case is significant. */ | |
261 | #define REG_ICASE (REG_EXTENDED << 1) | |
262 | ||
263 | /* If this bit is set, then anchors do not match at newline | |
264 | characters in the string. | |
265 | If not set, then anchors do match at newlines. */ | |
266 | #define REG_NEWLINE (REG_ICASE << 1) | |
267 | ||
268 | /* If this bit is set, then report only success or fail in regexec. | |
269 | If not set, then returns differ between not matching and errors. */ | |
270 | #define REG_NOSUB (REG_NEWLINE << 1) | |
271 | ||
272 | ||
273 | /* POSIX `eflags' bits (i.e., information for regexec). */ | |
274 | ||
275 | /* If this bit is set, then the beginning-of-line operator doesn't match | |
276 | the beginning of the string (presumably because it's not the | |
277 | beginning of a line). | |
278 | If not set, then the beginning-of-line operator does match the | |
279 | beginning of the string. */ | |
280 | #define REG_NOTBOL 1 | |
281 | ||
282 | /* Like REG_NOTBOL, except for the end-of-line. */ | |
283 | #define REG_NOTEOL (1 << 1) | |
284 | ||
285 | ||
286 | /* If any error codes are removed, changed, or added, update the | |
287 | `re_error_msg' table in regex.c. */ | |
288 | typedef enum | |
289 | { | |
290 | #if (_XOPEN_SOURCE - 0) == 500 | |
291 | REG_NOSYS = -1, /* This will never happen for this implementation. */ | |
292 | #endif | |
293 | ||
294 | REG_NOERROR = 0, /* Success. */ | |
295 | REG_NOMATCH, /* Didn't find a match (for regexec). */ | |
296 | ||
297 | /* POSIX regcomp return error codes. (In the order listed in the | |
298 | standard.) */ | |
299 | REG_BADPAT, /* Invalid pattern. */ | |
300 | REG_ECOLLATE, /* Not implemented. */ | |
301 | REG_ECTYPE, /* Invalid character class name. */ | |
302 | REG_EESCAPE, /* Trailing backslash. */ | |
303 | REG_ESUBREG, /* Invalid back reference. */ | |
304 | REG_EBRACK, /* Unmatched left bracket. */ | |
305 | REG_EPAREN, /* Parenthesis imbalance. */ | |
306 | REG_EBRACE, /* Unmatched \{. */ | |
307 | REG_BADBR, /* Invalid contents of \{\}. */ | |
308 | REG_ERANGE, /* Invalid range end. */ | |
309 | REG_ESPACE, /* Ran out of memory. */ | |
310 | REG_BADRPT, /* No preceding re for repetition op. */ | |
311 | ||
312 | /* Error codes we've added. */ | |
313 | REG_EEND, /* Premature end. */ | |
314 | REG_ESIZE, /* Compiled pattern bigger than 2^16 bytes. */ | |
315 | REG_ERPAREN /* Unmatched ) or \); not returned from regcomp. */ | |
316 | } reg_errcode_t; | |
317 | \f | |
318 | /* This data structure represents a compiled pattern. Before calling | |
319 | the pattern compiler, the fields `buffer', `allocated', `fastmap', | |
320 | `translate', and `no_sub' can be set. After the pattern has been | |
321 | compiled, the `re_nsub' field is available. All other fields are | |
322 | private to the regex routines. */ | |
323 | ||
324 | #ifndef RE_TRANSLATE_TYPE | |
325 | # define RE_TRANSLATE_TYPE char * | |
326 | #endif | |
327 | ||
328 | struct re_pattern_buffer | |
329 | { | |
330 | /* [[[begin pattern_buffer]]] */ | |
331 | /* Space that holds the compiled pattern. It is declared as | |
332 | `unsigned char *' because its elements are | |
333 | sometimes used as array indexes. */ | |
334 | unsigned char *buffer; | |
335 | ||
336 | /* Number of bytes to which `buffer' points. */ | |
337 | unsigned long int allocated; | |
338 | ||
339 | /* Number of bytes actually used in `buffer'. */ | |
340 | unsigned long int used; | |
341 | ||
342 | /* Syntax setting with which the pattern was compiled. */ | |
343 | reg_syntax_t syntax; | |
344 | ||
345 | /* Pointer to a fastmap, if any, otherwise zero. re_search uses | |
346 | the fastmap, if there is one, to skip over impossible | |
347 | starting points for matches. */ | |
348 | char *fastmap; | |
349 | ||
350 | /* Either a translate table to apply to all characters before | |
351 | comparing them, or zero for no translation. The translation | |
352 | is applied to a pattern when it is compiled and to a string | |
353 | when it is matched. */ | |
354 | RE_TRANSLATE_TYPE translate; | |
355 | ||
356 | /* Number of subexpressions found by the compiler. */ | |
357 | size_t re_nsub; | |
358 | ||
359 | /* Zero if this pattern cannot match the empty string, one else. | |
360 | Well, in truth it's used only in `re_search_2', to see | |
361 | whether or not we should use the fastmap, so we don't set | |
362 | this absolutely perfectly; see `re_compile_fastmap' (the | |
363 | `duplicate' case). */ | |
364 | unsigned can_be_null : 1; | |
365 | ||
366 | /* If REGS_UNALLOCATED, allocate space in the `regs' structure | |
367 | for `max (RE_NREGS, re_nsub + 1)' groups. | |
368 | If REGS_REALLOCATE, reallocate space if necessary. | |
369 | If REGS_FIXED, use what's there. */ | |
370 | #define REGS_UNALLOCATED 0 | |
371 | #define REGS_REALLOCATE 1 | |
372 | #define REGS_FIXED 2 | |
373 | unsigned regs_allocated : 2; | |
374 | ||
375 | /* Set to zero when `regex_compile' compiles a pattern; set to one | |
376 | by `re_compile_fastmap' if it updates the fastmap. */ | |
377 | unsigned fastmap_accurate : 1; | |
378 | ||
379 | /* If set, `re_match_2' does not return information about | |
380 | subexpressions. */ | |
381 | unsigned no_sub : 1; | |
382 | ||
383 | /* If set, a beginning-of-line anchor doesn't match at the | |
384 | beginning of the string. */ | |
385 | unsigned not_bol : 1; | |
386 | ||
387 | /* Similarly for an end-of-line anchor. */ | |
388 | unsigned not_eol : 1; | |
389 | ||
390 | /* If true, an anchor at a newline matches. */ | |
391 | unsigned newline_anchor : 1; | |
392 | ||
393 | /* [[[end pattern_buffer]]] */ | |
394 | }; | |
395 | ||
396 | typedef struct re_pattern_buffer regex_t; | |
397 | \f | |
398 | /* Type for byte offsets within the string. POSIX mandates this. */ | |
399 | typedef int regoff_t; | |
400 | ||
401 | ||
402 | /* This is the structure we store register match data in. See | |
403 | regex.texinfo for a full description of what registers match. */ | |
404 | struct re_registers | |
405 | { | |
406 | unsigned num_regs; | |
407 | regoff_t *start; | |
408 | regoff_t *end; | |
409 | }; | |
410 | ||
411 | ||
412 | /* If `regs_allocated' is REGS_UNALLOCATED in the pattern buffer, | |
413 | `re_match_2' returns information about at least this many registers | |
414 | the first time a `regs' structure is passed. */ | |
415 | #ifndef RE_NREGS | |
416 | # define RE_NREGS 30 | |
417 | #endif | |
418 | ||
419 | ||
420 | /* POSIX specification for registers. Aside from the different names than | |
421 | `re_registers', POSIX uses an array of structures, instead of a | |
422 | structure of arrays. */ | |
423 | typedef struct | |
424 | { | |
425 | regoff_t rm_so; /* Byte offset from string's start to substring's start. */ | |
426 | regoff_t rm_eo; /* Byte offset from string's start to substring's end. */ | |
427 | } regmatch_t; | |
428 | \f | |
429 | /* Declarations for routines. */ | |
430 | ||
431 | /* To avoid duplicating every routine declaration -- once with a | |
432 | prototype (if we are ANSI), and once without (if we aren't) -- we | |
433 | use the following macro to declare argument types. This | |
434 | unfortunately clutters up the declarations a bit, but I think it's | |
435 | worth it. */ | |
436 | ||
437 | #if __STDC__ | |
438 | ||
439 | # define _RE_ARGS(args) args | |
440 | ||
441 | #else /* not __STDC__ */ | |
442 | ||
443 | # define _RE_ARGS(args) () | |
444 | ||
445 | #endif /* not __STDC__ */ | |
446 | ||
447 | /* Sets the current default syntax to SYNTAX, and return the old syntax. | |
448 | You can also simply assign to the `re_syntax_options' variable. */ | |
449 | extern reg_syntax_t __re_set_syntax _RE_ARGS ((reg_syntax_t syntax)); | |
450 | extern reg_syntax_t re_set_syntax _RE_ARGS ((reg_syntax_t syntax)); | |
451 | ||
452 | /* Compile the regular expression PATTERN, with length LENGTH | |
453 | and syntax given by the global `re_syntax_options', into the buffer | |
454 | BUFFER. Return NULL if successful, and an error string if not. */ | |
455 | extern const char *__re_compile_pattern | |
456 | _RE_ARGS ((const char *pattern, size_t length, | |
457 | struct re_pattern_buffer *buffer)); | |
458 | extern const char *re_compile_pattern | |
459 | _RE_ARGS ((const char *pattern, size_t length, | |
460 | struct re_pattern_buffer *buffer)); | |
461 | ||
462 | ||
463 | /* Compile a fastmap for the compiled pattern in BUFFER; used to | |
464 | accelerate searches. Return 0 if successful and -2 if was an | |
465 | internal error. */ | |
466 | extern int __re_compile_fastmap _RE_ARGS ((struct re_pattern_buffer *buffer)); | |
467 | extern int re_compile_fastmap _RE_ARGS ((struct re_pattern_buffer *buffer)); | |
468 | ||
469 | ||
470 | /* Search in the string STRING (with length LENGTH) for the pattern | |
471 | compiled into BUFFER. Start searching at position START, for RANGE | |
472 | characters. Return the starting position of the match, -1 for no | |
473 | match, or -2 for an internal error. Also return register | |
474 | information in REGS (if REGS and BUFFER->no_sub are nonzero). */ | |
475 | extern int __re_search | |
476 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string, | |
477 | int length, int start, int range, struct re_registers *regs)); | |
478 | extern int re_search | |
479 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string, | |
480 | int length, int start, int range, struct re_registers *regs)); | |
481 | ||
482 | ||
483 | /* Like `re_search', but search in the concatenation of STRING1 and | |
484 | STRING2. Also, stop searching at index START + STOP. */ | |
485 | extern int __re_search_2 | |
486 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1, | |
487 | int length1, const char *string2, int length2, | |
488 | int start, int range, struct re_registers *regs, int stop)); | |
489 | extern int re_search_2 | |
490 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1, | |
491 | int length1, const char *string2, int length2, | |
492 | int start, int range, struct re_registers *regs, int stop)); | |
493 | ||
494 | ||
495 | /* Like `re_search', but return how many characters in STRING the regexp | |
496 | in BUFFER matched, starting at position START. */ | |
497 | extern int __re_match | |
498 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string, | |
499 | int length, int start, struct re_registers *regs)); | |
500 | extern int re_match | |
501 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string, | |
502 | int length, int start, struct re_registers *regs)); | |
503 | ||
504 | ||
505 | /* Relates to `re_match' as `re_search_2' relates to `re_search'. */ | |
506 | extern int __re_match_2 | |
507 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1, | |
508 | int length1, const char *string2, int length2, | |
509 | int start, struct re_registers *regs, int stop)); | |
510 | extern int re_match_2 | |
511 | _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1, | |
512 | int length1, const char *string2, int length2, | |
513 | int start, struct re_registers *regs, int stop)); | |
514 | ||
515 | ||
516 | /* Set REGS to hold NUM_REGS registers, storing them in STARTS and | |
517 | ENDS. Subsequent matches using BUFFER and REGS will use this memory | |
518 | for recording register information. STARTS and ENDS must be | |
519 | allocated with malloc, and must each be at least `NUM_REGS * sizeof | |
520 | (regoff_t)' bytes long. | |
521 | ||
522 | If NUM_REGS == 0, then subsequent matches should allocate their own | |
523 | register data. | |
524 | ||
525 | Unless this function is called, the first search or match using | |
526 | PATTERN_BUFFER will allocate its own register data, without | |
527 | freeing the old data. */ | |
528 | extern void __re_set_registers | |
529 | _RE_ARGS ((struct re_pattern_buffer *buffer, struct re_registers *regs, | |
530 | unsigned num_regs, regoff_t *starts, regoff_t *ends)); | |
531 | extern void re_set_registers | |
532 | _RE_ARGS ((struct re_pattern_buffer *buffer, struct re_registers *regs, | |
533 | unsigned num_regs, regoff_t *starts, regoff_t *ends)); | |
534 | ||
535 | #ifdef _REGEX_RE_COMP | |
536 | # ifndef _CRAY | |
537 | /* 4.2 bsd compatibility. */ | |
538 | extern char *re_comp _RE_ARGS ((const char *)); | |
539 | extern int re_exec _RE_ARGS ((const char *)); | |
540 | # endif | |
541 | #endif | |
542 | ||
543 | /* POSIX compatibility. */ | |
544 | extern int __regcomp _RE_ARGS ((regex_t *__preg, const char *__pattern, | |
545 | int __cflags)); | |
546 | extern int regcomp _RE_ARGS ((regex_t *__preg, const char *__pattern, | |
547 | int __cflags)); | |
548 | ||
549 | extern int __regexec _RE_ARGS ((const regex_t *__preg, | |
550 | const char *__string, size_t __nmatch, | |
551 | regmatch_t __pmatch[], int __eflags)); | |
552 | extern int regexec _RE_ARGS ((const regex_t *__preg, | |
553 | const char *__string, size_t __nmatch, | |
554 | regmatch_t __pmatch[], int __eflags)); | |
555 | ||
556 | extern size_t __regerror _RE_ARGS ((int __errcode, const regex_t *__preg, | |
557 | char *__errbuf, size_t __errbuf_size)); | |
558 | extern size_t regerror _RE_ARGS ((int __errcode, const regex_t *__preg, | |
559 | char *__errbuf, size_t __errbuf_size)); | |
560 | ||
561 | extern void __regfree _RE_ARGS ((regex_t *__preg)); | |
562 | extern void regfree _RE_ARGS ((regex_t *__preg)); | |
563 | ||
564 | ||
565 | #ifdef __cplusplus | |
566 | } | |
567 | #endif /* C++ */ | |
568 | ||
569 | #endif /* regex.h */ | |
570 | \f | |
571 | /* | |
572 | Local variables: | |
573 | make-backup-files: t | |
574 | version-control: t | |
575 | trim-versions-without-asking: nil | |
576 | End: | |
577 | */ |