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[glibc/history.git] / misc / regexp.c
blobebd0bf7649a507d526e7f33d017d13d8378b4bb0
1 /* Define function and variables for the obsolete <regexp.h> interface.
2 Copyright (C) 1996, 2000 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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #define __DO_NOT_DEFINE_COMPILE
22 #include <regexp.h>
24 /* Define the variables used for the interface. */
25 char *loc1;
26 char *loc2;
28 /* Although we do not support the use we define this variable as well. */
29 char *locs;
32 /* Find the next match in STRING. The compiled regular expression is
33 found in the buffer starting at EXPBUF. `loc1' will return the
34 first character matched and `loc2' points to the next unmatched
35 character. */
36 extern int __step (const char *string, const char *expbuf);
37 int
38 __step (const char *string, const char *expbuf)
40 regmatch_t match; /* We only need info about the full match. */
42 expbuf += __alignof (regex_t *);
43 expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
45 if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
46 == REG_NOMATCH)
47 return 0;
49 loc1 = (char *) string + match.rm_so;
50 loc2 = (char *) string + match.rm_eo;
51 return 1;
53 weak_alias (__step, step)
56 /* Match the beginning of STRING with the compiled regular expression
57 in EXPBUF. If the match is successful `loc2' will contain the
58 position of the first unmatched character. */
59 extern int __advance (const char *string, const char *expbuf);
60 int
61 __advance (const char *string, const char *expbuf)
63 regmatch_t match; /* We only need info about the full match. */
65 expbuf += __alignof__ (regex_t *);
66 expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
68 if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
69 == REG_NOMATCH
70 /* We have to check whether the check is at the beginning of the
71 buffer. */
72 || match.rm_so != 0)
73 return 0;
75 loc2 = (char *) string + match.rm_eo;
76 return 1;
78 weak_alias (__advance, advance)