1 /* LGPLd GNU regex for Native WIN32 */
2 
3 /* Part of the ht://Dig package   <http://www.htdig.org/> */
4 /* Copyright (c) 2003 The ht://Dig Group */
5 /* For copyright details, see the file COPYING in your distribution */
6 /* or the GNU Library General Public License (LGPL) version 2 or later or later */
7 /* <http://www.gnu.org/copyleft/lgpl.html> */
8 
9 /* Added June 2003 Neal Richter, RightNow Technologies */
10 
11 /* note that this version is significantly different from the original  */
12 /* version 0.12 GNU source code.  It compiles and works on Native WIN32. */
13 
14 /* Definitions for data structures and routines for the regular
15    expression library, version 0.12.
16    Copyright (C) 1985,89,90,91,92,93,95,96,97 Free Software Foundation, Inc.
17 
18    This file is part of the GNU C Library.  Its master source is NOT part of
19    the C library, however.  The master source lives in /gd/gnu/lib.
20 
21    The GNU C Library is free software; you can redistribute it and/or
22    modify it under the terms of the GNU Library General Public License as
23    published by the Free Software Foundation; either version 2 of the
24    License, or (at your option) any later version.
25 
26    The GNU C Library is distributed in the hope that it will be useful,
27    but WITHOUT ANY WARRANTY; without even the implied warranty of
28    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
29    Library General Public License for more details.
30 
31    You should have received a copy of the GNU Library General Public
32    License along with the GNU C Library; see the file COPYING.LIB.  If not,
33    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
34    Boston, MA 02111-1307, USA.  */
35 
36 #ifndef __REGEXP_LIBRARY_H__
37 #define __REGEXP_LIBRARY_H__
38 
39 /* Allow the use in C++ code.  */
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43 
44 #include <stdlib.h>
45     /* POSIX says that <sys/types.h> must be included (by the caller) before
46        <regex.h>.  */
47 
48 #if !defined (_POSIX_C_SOURCE) && !defined (_POSIX_SOURCE) && defined (VMS)
49     /* VMS doesn't have `size_t' in <sys/types.h>, even though POSIX says it
50        should be there.  */
51 #include <stddef.h>
52 #endif
53 
54     /* The following two types have to be signed and unsigned integer type
55        wide enough to hold a value of a pointer.  For most ANSI compilers
56        ptrdiff_t and size_t should be likely OK.  Still size of these two
57        types is 2 for Microsoft C.  Ugh... */
58     typedef long int s_reg_t;
59     typedef unsigned long int active_reg_t;
60 
61     /* The following bits are used to determine the regexp syntax we
62        recognize.  The set/not-set meanings are chosen so that Emacs syntax
63        remains the value 0.  The bits are given in alphabetical order, and
64        the definitions shifted by one from the previous bit; thus, when we
65        add or remove a bit, only one other definition need change.  */
66     typedef unsigned long int reg_syntax_t;
67 
68     /* If this bit is not set, then \ inside a bracket expression is literal.
69        If set, then such a \ quotes the following character.  */
70 #define RE_BACKSLASH_ESCAPE_IN_LISTS ((unsigned long int) 1)
71 
72     /* If this bit is not set, then + and ? are operators, and \+ and \? are
73        literals.
74        If set, then \+ and \? are operators and + and ? are literals.  */
75 #define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1)
76 
77     /* If this bit is set, then character classes are supported.  They are:
78        [:alpha:], [:upper:], [:lower:],  [:digit:], [:alnum:], [:xdigit:],
79        [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:].
80        If not set, then character classes are not supported.  */
81 #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1)
82 
83     /* If this bit is set, then ^ and $ are always anchors (outside bracket
84        expressions, of course).
85        If this bit is not set, then it depends:
86        ^  is an anchor if it is at the beginning of a regular
87        expression or after an open-group or an alternation operator;
88        $  is an anchor if it is at the end of a regular expression, or
89        before a close-group or an alternation operator.
90 
91        This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because
92        POSIX draft 11.2 says that * etc. in leading positions is undefined.
93        We already implemented a previous draft which made those constructs
94        invalid, though, so we haven't changed the code back.  */
95 #define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1)
96 
97     /* If this bit is set, then special characters are always special
98        regardless of where they are in the pattern.
99        If this bit is not set, then special characters are special only in
100        some contexts; otherwise they are ordinary.  Specifically,
101        * + ? and intervals are only special when not after the beginning,
102        open-group, or alternation operator.  */
103 #define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1)
104 
105     /* If this bit is set, then *, +, ?, and { cannot be first in an re or
106        immediately after an alternation or begin-group operator.  */
107 #define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1)
108 
109     /* If this bit is set, then . matches newline.
110        If not set, then it doesn't.  */
111 #define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1)
112 
113     /* If this bit is set, then . doesn't match NUL.
114        If not set, then it does.  */
115 #define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1)
116 
117     /* If this bit is set, nonmatching lists [^...] do not match newline.
118        If not set, they do.  */
119 #define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1)
120 
121     /* If this bit is set, either \{...\} or {...} defines an
122        interval, depending on RE_NO_BK_BRACES.
123        If not set, \{, \}, {, and } are literals.  */
124 #define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1)
125 
126     /* If this bit is set, +, ? and | aren't recognized as operators.
127        If not set, they are.  */
128 #define RE_LIMITED_OPS (RE_INTERVALS << 1)
129 
130     /* If this bit is set, newline is an alternation operator.
131        If not set, newline is literal.  */
132 #define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1)
133 
134     /* If this bit is set, then `{...}' defines an interval, and \{ and \}
135        are literals.
136        If not set, then `\{...\}' defines an interval.  */
137 #define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1)
138 
139     /* If this bit is set, (...) defines a group, and \( and \) are literals.
140        If not set, \(...\) defines a group, and ( and ) are literals.  */
141 #define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1)
142 
143     /* If this bit is set, then \<digit> matches <digit>.
144        If not set, then \<digit> is a back-reference.  */
145 #define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1)
146 
147     /* If this bit is set, then | is an alternation operator, and \| is literal.
148        If not set, then \| is an alternation operator, and | is literal.  */
149 #define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1)
150 
151     /* If this bit is set, then an ending range point collating higher
152        than the starting range point, as in [z-a], is invalid.
153        If not set, then when ending range point collates higher than the
154        starting range point, the range is ignored.  */
155 #define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1)
156 
157     /* If this bit is set, then an unmatched ) is ordinary.
158        If not set, then an unmatched ) is invalid.  */
159 #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1)
160 
161     /* If this bit is set, succeed as soon as we match the whole pattern,
162        without further backtracking.  */
163 #define RE_NO_POSIX_BACKTRACKING (RE_UNMATCHED_RIGHT_PAREN_ORD << 1)
164 
165     /* If this bit is set, do not process the GNU regex operators.
166        If not set, then the GNU regex operators are recognized. */
167 #define RE_NO_GNU_OPS (RE_NO_POSIX_BACKTRACKING << 1)
168 
169     /* If this bit is set, turn on internal regex debugging.
170        If not set, and debugging was on, turn it off.
171        This only works if regex.c is compiled -DDEBUG.
172        We define this bit always, so that all that's needed to turn on
173        debugging is to recompile regex.c; the calling code can always have
174        this bit set, and it won't affect anything in the normal case. */
175 #define RE_DEBUG (RE_NO_GNU_OPS << 1)
176 
177     /* This global variable defines the particular regexp syntax to use (for
178        some interfaces).  When a regexp is compiled, the syntax used is
179        stored in the pattern buffer, so changing this does not affect
180        already-compiled regexps.  */
181     extern reg_syntax_t re_syntax_options;
182 
183     /* Define combinations of the above bits for the standard possibilities.
184        (The [[[ comments delimit what gets put into the Texinfo file, so
185        don't delete them!)  */
186     /* [[[begin syntaxes]]] */
187 #define RE_SYNTAX_EMACS 0
188 
189 #define RE_SYNTAX_AWK                                                   \
190   (RE_BACKSLASH_ESCAPE_IN_LISTS   | RE_DOT_NOT_NULL                     \
191    | RE_NO_BK_PARENS              | RE_NO_BK_REFS                       \
192    | RE_NO_BK_VBAR                | RE_NO_EMPTY_RANGES                  \
193    | RE_DOT_NEWLINE               | RE_CONTEXT_INDEP_ANCHORS            \
194    | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_GNU_OPS)
195 
196 #define RE_SYNTAX_GNU_AWK                                               \
197   ((RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DEBUG) \
198    & ~(RE_DOT_NOT_NULL | RE_INTERVALS | RE_CONTEXT_INDEP_OPS))
199 
200 #define RE_SYNTAX_POSIX_AWK                                             \
201   (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS              \
202    | RE_INTERVALS           | RE_NO_GNU_OPS)
203 
204 #define RE_SYNTAX_GREP                                                  \
205   (RE_BK_PLUS_QM              | RE_CHAR_CLASSES                         \
206    | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS                            \
207    | RE_NEWLINE_ALT)
208 
209 #define RE_SYNTAX_EGREP                                                 \
210   (RE_CHAR_CLASSES        | RE_CONTEXT_INDEP_ANCHORS                    \
211    | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE                    \
212    | RE_NEWLINE_ALT       | RE_NO_BK_PARENS                             \
213    | RE_NO_BK_VBAR)
214 
215 #define RE_SYNTAX_POSIX_EGREP                                           \
216   (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES)
217 
218     /* P1003.2/D11.2, section 4.20.7.1, lines 5078ff.  */
219 #define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC
220 
221 #define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC
222 
223     /* Syntax bits common to both basic and extended POSIX regex syntax.  */
224 #define _RE_SYNTAX_POSIX_COMMON                                         \
225   (RE_CHAR_CLASSES | RE_DOT_NEWLINE      | RE_DOT_NOT_NULL              \
226    | RE_INTERVALS  | RE_NO_EMPTY_RANGES)
227 
228 #define RE_SYNTAX_POSIX_BASIC                                           \
229   (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM)
230 
231     /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes
232        RE_LIMITED_OPS, i.e., \? \+ \| are not recognized.  Actually, this
233        isn't minimal, since other operators, such as \`, aren't disabled.  */
234 #define RE_SYNTAX_POSIX_MINIMAL_BASIC                                   \
235   (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS)
236 
237 #define RE_SYNTAX_POSIX_EXTENDED                                        \
238   (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS                   \
239    | RE_CONTEXT_INDEP_OPS  | RE_NO_BK_BRACES                            \
240    | RE_NO_BK_PARENS       | RE_NO_BK_VBAR                              \
241    | RE_UNMATCHED_RIGHT_PAREN_ORD)
242 
243     /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INVALID_OPS
244        replaces RE_CONTEXT_INDEP_OPS and RE_NO_BK_REFS is added.  */
245 #define RE_SYNTAX_POSIX_MINIMAL_EXTENDED                                \
246   (_RE_SYNTAX_POSIX_COMMON  | RE_CONTEXT_INDEP_ANCHORS                  \
247    | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES                           \
248    | RE_NO_BK_PARENS        | RE_NO_BK_REFS                             \
249    | RE_NO_BK_VBAR          | RE_UNMATCHED_RIGHT_PAREN_ORD)
250     /* [[[end syntaxes]]] */
251 
252     /* Maximum number of duplicates an interval can allow.  Some systems
253        (erroneously) define this in other header files, but we want our
254        value, so remove any previous define.  */
255 #ifdef RE_DUP_MAX
256 #undef RE_DUP_MAX
257 #endif
258     /* If sizeof(int) == 2, then ((1 << 15) - 1) overflows.  */
259 #define RE_DUP_MAX (0x7fff)
260 
261 
262     /* POSIX `cflags' bits (i.e., information for `regcomp').  */
263 
264     /* If this bit is set, then use extended regular expression syntax.
265        If not set, then use basic regular expression syntax.  */
266 #define REG_EXTENDED 1
267 
268     /* If this bit is set, then ignore case when matching.
269        If not set, then case is significant.  */
270 #define REG_ICASE (REG_EXTENDED << 1)
271 
272     /* If this bit is set, then anchors do not match at newline
273        characters in the string.
274        If not set, then anchors do match at newlines.  */
275 #define REG_NEWLINE (REG_ICASE << 1)
276 
277     /* If this bit is set, then report only success or fail in regexec.
278        If not set, then returns differ between not matching and errors.  */
279 #define REG_NOSUB (REG_NEWLINE << 1)
280 
281 
282     /* POSIX `eflags' bits (i.e., information for regexec).  */
283 
284     /* If this bit is set, then the beginning-of-line operator doesn't match
285        the beginning of the string (presumably because it's not the
286        beginning of a line).
287        If not set, then the beginning-of-line operator does match the
288        beginning of the string.  */
289 #define REG_NOTBOL 1
290 
291     /* Like REG_NOTBOL, except for the end-of-line.  */
292 #define REG_NOTEOL (1 << 1)
293 
294 
295     /* If any error codes are removed, changed, or added, update the
296        `re_error_msg' table in regex.c.  */
297     typedef enum
298     {
299         REG_NOERROR = 0,        /* Success.  */
300         REG_NOMATCH,            /* Didn't find a match (for regexec).  */
301 
302         /* POSIX regcomp return error codes.  (In the order listed in the
303            standard.)  */
304         REG_BADPAT,             /* Invalid pattern.  */
305         REG_ECOLLATE,           /* Not implemented.  */
306         REG_ECTYPE,             /* Invalid character class name.  */
307         REG_EESCAPE,            /* Trailing backslash.  */
308         REG_ESUBREG,            /* Invalid back reference.  */
309         REG_EBRACK,             /* Unmatched left bracket.  */
310         REG_EPAREN,             /* Parenthesis imbalance.  */
311         REG_EBRACE,             /* Unmatched \{.  */
312         REG_BADBR,              /* Invalid contents of \{\}.  */
313         REG_ERANGE,             /* Invalid range end.  */
314         REG_ESPACE,             /* Ran out of memory.  */
315         REG_BADRPT,             /* No preceding re for repetition op.  */
316 
317         /* Error codes we've added.  */
318         REG_EEND,               /* Premature end.  */
319         REG_ESIZE,              /* Compiled pattern bigger than 2^16 bytes.  */
320         REG_ERPAREN             /* Unmatched ) or \); not returned from regcomp.  */
321     } reg_errcode_t;
322 
323     /* This data structure represents a compiled pattern.  Before calling
324        the pattern compiler, the fields `buffer', `allocated', `fastmap',
325        `translate', and `no_sub' can be set.  After the pattern has been
326        compiled, the `re_nsub' field is available.  All other fields are
327        private to the regex routines.  */
328 
329 #ifndef RE_TRANSLATE_TYPE
330 #define RE_TRANSLATE_TYPE char *
331 #endif
332 
333     struct re_pattern_buffer
334     {
335         /* [[[begin pattern_buffer]]] */
336         /* Space that holds the compiled pattern.  It is declared as
337            `unsigned char *' because its elements are
338            sometimes used as array indexes.  */
339         unsigned char *buffer;
340 
341         /* Number of bytes to which `buffer' points.  */
342         unsigned long int allocated;
343 
344         /* Number of bytes actually used in `buffer'.  */
345         unsigned long int used;
346 
347         /* Syntax setting with which the pattern was compiled.  */
348         reg_syntax_t syntax;
349 
350         /* Pointer to a fastmap, if any, otherwise zero.  re_search uses
351            the fastmap, if there is one, to skip over impossible
352            starting points for matches.  */
353         char *fastmap;
354 
355         /* Either a translate table to apply to all characters before
356            comparing them, or zero for no translation.  The translation
357            is applied to a pattern when it is compiled and to a string
358            when it is matched.  */
359         RE_TRANSLATE_TYPE translate;
360 
361         /* Number of subexpressions found by the compiler.  */
362         size_t re_nsub;
363 
364         /* Zero if this pattern cannot match the empty string, one else.
365            Well, in truth it's used only in `re_search_2', to see
366            whether or not we should use the fastmap, so we don't set
367            this absolutely perfectly; see `re_compile_fastmap' (the
368            `duplicate' case).  */
369         unsigned can_be_null : 1;
370 
371         /* If REGS_UNALLOCATED, allocate space in the `regs' structure
372            for `max (RE_NREGS, re_nsub + 1)' groups.
373            If REGS_REALLOCATE, reallocate space if necessary.
374            If REGS_FIXED, use what's there.  */
375 #define REGS_UNALLOCATED 0
376 #define REGS_REALLOCATE 1
377 #define REGS_FIXED 2
378         unsigned regs_allocated : 2;
379 
380         /* Set to zero when `regex_compile' compiles a pattern; set to one
381            by `re_compile_fastmap' if it updates the fastmap.  */
382         unsigned fastmap_accurate : 1;
383 
384         /* If set, `re_match_2' does not return information about
385            subexpressions.  */
386         unsigned no_sub : 1;
387 
388         /* If set, a beginning-of-line anchor doesn't match at the
389            beginning of the string.  */
390         unsigned not_bol : 1;
391 
392         /* Similarly for an end-of-line anchor.  */
393         unsigned not_eol : 1;
394 
395         /* If true, an anchor at a newline matches.  */
396         unsigned newline_anchor : 1;
397 
398         /* [[[end pattern_buffer]]] */
399     };
400 
401     typedef struct re_pattern_buffer regex_t;
402 
403     /* Type for byte offsets within the string.  POSIX mandates this.  */
404     typedef int regoff_t;
405 
406 
407     /* This is the structure we store register match data in.  See
408        regex.texinfo for a full description of what registers match.  */
409     struct re_registers
410     {
411         unsigned num_regs;
412         regoff_t *start;
413         regoff_t *end;
414     };
415 
416 
417     /* If `regs_allocated' is REGS_UNALLOCATED in the pattern buffer,
418        `re_match_2' returns information about at least this many registers
419        the first time a `regs' structure is passed.  */
420 #ifndef RE_NREGS
421 #define RE_NREGS 30
422 #endif
423 
424 
425     /* POSIX specification for registers.  Aside from the different names than
426        `re_registers', POSIX uses an array of structures, instead of a
427        structure of arrays.  */
428     typedef struct
429     {
430         regoff_t rm_so;  /* Byte offset from string's start to substring's start.  */
431         regoff_t rm_eo;  /* Byte offset from string's start to substring's end.  */
432     } regmatch_t;
433 
434     /* Declarations for routines.  */
435 
436     /* To avoid duplicating every routine declaration -- once with a
437        prototype (if we are ANSI), and once without (if we aren't) -- we
438        use the following macro to declare argument types.  This
439        unfortunately clutters up the declarations a bit, but I think it's
440        worth it.  */
441 
442 #if defined(__STDC__) || defined(_WIN32)
443 #define _RE_ARGS(args) args
444 
445 #else /* not __STDC__ */
446 
447 #define _RE_ARGS(args) ()
448 
449 #endif /* not __STDC__ */
450 
451     /* Sets the current default syntax to SYNTAX, and return the old syntax.
452        You can also simply assign to the `re_syntax_options' variable.  */
453     extern reg_syntax_t re_set_syntax _RE_ARGS ((reg_syntax_t syntax));
454 
455     /* Compile the regular expression PATTERN, with length LENGTH
456        and syntax given by the global `re_syntax_options', into the buffer
457        BUFFER.  Return NULL if successful, and an error string if not.  */
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 
468 
469     /* Search in the string STRING (with length LENGTH) for the pattern
470        compiled into BUFFER.  Start searching at position START, for RANGE
471        characters.  Return the starting position of the match, -1 for no
472        match, or -2 for an internal error.  Also return register
473        information in REGS (if REGS and BUFFER->no_sub are nonzero).  */
474     extern int re_search
475     _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string,
476                int length, int start, int range, struct re_registers *regs));
477 
478 
479     /* Like `re_search', but search in the concatenation of STRING1 and
480        STRING2.  Also, stop searching at index START + STOP.  */
481     extern int re_search_2
482     _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1,
483                int length1, const char *string2, int length2,
484                int start, int range, struct re_registers *regs, int stop));
485 
486 
487     /* Like `re_search', but return how many characters in STRING the regexp
488        in BUFFER matched, starting at position START.  */
489     extern int re_match
490     _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string,
491                int length, int start, struct re_registers *regs));
492 
493 
494     /* Relates to `re_match' as `re_search_2' relates to `re_search'.  */
495     extern int re_match_2
496     _RE_ARGS ((struct re_pattern_buffer *buffer, const char *string1,
497                int length1, const char *string2, int length2,
498                int start, struct re_registers *regs, int stop));
499 
500 
501     /* Set REGS to hold NUM_REGS registers, storing them in STARTS and
502        ENDS.  Subsequent matches using BUFFER and REGS will use this memory
503        for recording register information.  STARTS and ENDS must be
504        allocated with malloc, and must each be at least `NUM_REGS * sizeof
505        (regoff_t)' bytes long.
506 
507        If NUM_REGS == 0, then subsequent matches should allocate their own
508        register data.
509 
510        Unless this function is called, the first search or match using
511        PATTERN_BUFFER will allocate its own register data, without
512        freeing the old data.  */
513     extern void re_set_registers
514     _RE_ARGS ((struct re_pattern_buffer *buffer, struct re_registers *regs,
515                unsigned num_regs, regoff_t *starts, regoff_t *ends));
516 
517 #ifdef _REGEX_RE_COMP
518 #ifndef _CRAY
519     /* 4.2 bsd compatibility.  */
520     extern char *re_comp _RE_ARGS ((const char *));
521     extern int re_exec _RE_ARGS ((const char *));
522 #endif
523 #endif
524 
525     /* POSIX compatibility.  */
526     int regcomp _RE_ARGS ((regex_t *preg, const char *pattern, int cflags));
527     int regexec
528     _RE_ARGS ((const regex_t *preg, const char *string, size_t nmatch,
529                regmatch_t pmatch[], int eflags));
530     size_t regerror
531     _RE_ARGS ((int errcode, const regex_t *preg, char *errbuf,
532                size_t errbuf_size));
533     void regfree _RE_ARGS ((regex_t *preg));
534 
535 
536 #ifdef __cplusplus
537 }
538 #endif  /* C++ */
539 
540 #endif /* not __REGEXP_LIBRARY_H__ */
541 
542 /*
543   Local variables:
544   make-backup-files: t
545   version-control: t
546   trim-versions-without-asking: nil
547   End:
548 */
549