Fix h_errno namespace (bug 18520).
[glibc.git] / misc / regexp.c
blob3b83203cedc200a86a5d992b950323b3a5d0e7e0
1 /* Define function and variables for the obsolete <regexp.h> interface.
2 Copyright (C) 1996-2015 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library 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 GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 #define __DO_NOT_DEFINE_COMPILE
21 #include <regexp.h>
23 /* Define the variables used for the interface. */
24 char *loc1;
25 char *loc2;
27 /* Although we do not support the use we define this variable as well. */
28 char *locs;
31 /* Find the next match in STRING. The compiled regular expression is
32 found in the buffer starting at EXPBUF. `loc1' will return the
33 first character matched and `loc2' points to the next unmatched
34 character. */
35 extern int __step (const char *string, const char *expbuf);
36 int
37 __step (const char *string, const char *expbuf)
39 regmatch_t match; /* We only need info about the full match. */
41 expbuf += __alignof (regex_t *);
42 expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
44 if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
45 == REG_NOMATCH)
46 return 0;
48 loc1 = (char *) string + match.rm_so;
49 loc2 = (char *) string + match.rm_eo;
50 return 1;
52 weak_alias (__step, step)
55 /* Match the beginning of STRING with the compiled regular expression
56 in EXPBUF. If the match is successful `loc2' will contain the
57 position of the first unmatched character. */
58 extern int __advance (const char *string, const char *expbuf);
59 int
60 __advance (const char *string, const char *expbuf)
62 regmatch_t match; /* We only need info about the full match. */
64 expbuf += __alignof__ (regex_t *);
65 expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
67 if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
68 == REG_NOMATCH
69 /* We have to check whether the check is at the beginning of the
70 buffer. */
71 || match.rm_so != 0)
72 return 0;
74 loc2 = (char *) string + match.rm_eo;
75 return 1;
77 weak_alias (__advance, advance)