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1c70b6f1 | 1 | /* Compatibility symbols for the obsolete <regexp.h> interface. |
04277e02 | 2 | Copyright (C) 1996-2019 Free Software Foundation, Inc. |
84384f5b UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
84384f5b UD |
10 | |
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 | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
84384f5b | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
84384f5b | 19 | |
1c70b6f1 ZW |
20 | /* regexp.h now contains only an #error directive, so it cannot be |
21 | used in this file. | |
22 | ||
23 | The function that would produce an 'expbuf' to use as the second | |
24 | argument to 'step' and 'advance' was defined only in regexp.h, | |
25 | as its definition depended on macros defined by the user. */ | |
2ec11c2b ZW |
26 | |
27 | #include <regex.h> | |
1c70b6f1 ZW |
28 | #include <shlib-compat.h> |
29 | ||
30 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23) | |
84384f5b | 31 | |
388b4f1a L |
32 | /* Define the variables used for the interface. Avoid .symver on common |
33 | symbol, which just creates a new common symbol, not an alias. */ | |
34 | char *loc1 __attribute__ ((nocommon)); | |
35 | char *loc2 __attribute__ ((nocommon)); | |
1c70b6f1 ZW |
36 | compat_symbol (libc, loc1, loc1, GLIBC_2_0); |
37 | compat_symbol (libc, loc2, loc2, GLIBC_2_0); | |
84384f5b UD |
38 | |
39 | /* Although we do not support the use we define this variable as well. */ | |
388b4f1a | 40 | char *locs __attribute__ ((nocommon)); |
1c70b6f1 | 41 | compat_symbol (libc, locs, locs, GLIBC_2_0); |
84384f5b UD |
42 | |
43 | ||
44 | /* Find the next match in STRING. The compiled regular expression is | |
45 | found in the buffer starting at EXPBUF. `loc1' will return the | |
46 | first character matched and `loc2' points to the next unmatched | |
47 | character. */ | |
48 | int | |
1c70b6f1 ZW |
49 | weak_function attribute_compat_text_section |
50 | step (const char *string, const char *expbuf) | |
84384f5b UD |
51 | { |
52 | regmatch_t match; /* We only need info about the full match. */ | |
53 | ||
54 | expbuf += __alignof (regex_t *); | |
55 | expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *); | |
56 | ||
49f3a758 | 57 | if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL) |
84384f5b UD |
58 | == REG_NOMATCH) |
59 | return 0; | |
60 | ||
61 | loc1 = (char *) string + match.rm_so; | |
62 | loc2 = (char *) string + match.rm_eo; | |
63 | return 1; | |
64 | } | |
1c70b6f1 | 65 | compat_symbol (libc, step, step, GLIBC_2_0); |
84384f5b UD |
66 | |
67 | ||
68 | /* Match the beginning of STRING with the compiled regular expression | |
69 | in EXPBUF. If the match is successful `loc2' will contain the | |
70 | position of the first unmatched character. */ | |
71 | int | |
1c70b6f1 ZW |
72 | weak_function attribute_compat_text_section |
73 | advance (const char *string, const char *expbuf) | |
84384f5b UD |
74 | { |
75 | regmatch_t match; /* We only need info about the full match. */ | |
76 | ||
77 | expbuf += __alignof__ (regex_t *); | |
78 | expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *); | |
79 | ||
49f3a758 | 80 | if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL) |
84384f5b UD |
81 | == REG_NOMATCH |
82 | /* We have to check whether the check is at the beginning of the | |
83 | buffer. */ | |
84 | || match.rm_so != 0) | |
85 | return 0; | |
86 | ||
87 | loc2 = (char *) string + match.rm_eo; | |
88 | return 1; | |
89 | } | |
1c70b6f1 ZW |
90 | compat_symbol (libc, advance, advance, GLIBC_2_0); |
91 | ||
92 | ||
93 | #endif /* SHLIB_COMPAT (2.0, 2.23) */ |