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1c70b6f1 | 1 | /* Compatibility symbols for the obsolete <regexp.h> interface. |
2b778ceb | 2 | Copyright (C) 1996-2021 Free Software Foundation, Inc. |
84384f5b | 3 | This file is part of the GNU C Library. |
84384f5b UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
84384f5b UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
84384f5b | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
84384f5b | 18 | |
1c70b6f1 ZW |
19 | /* regexp.h now contains only an #error directive, so it cannot be |
20 | used in this file. | |
21 | ||
22 | The function that would produce an 'expbuf' to use as the second | |
23 | argument to 'step' and 'advance' was defined only in regexp.h, | |
24 | as its definition depended on macros defined by the user. */ | |
2ec11c2b ZW |
25 | |
26 | #include <regex.h> | |
1c70b6f1 ZW |
27 | #include <shlib-compat.h> |
28 | ||
29 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23) | |
84384f5b | 30 | |
7c241325 FW |
31 | /* Define the variables used for the interface. */ |
32 | char *loc1; | |
33 | char *loc2; | |
1c70b6f1 ZW |
34 | compat_symbol (libc, loc1, loc1, GLIBC_2_0); |
35 | compat_symbol (libc, loc2, loc2, GLIBC_2_0); | |
84384f5b UD |
36 | |
37 | /* Although we do not support the use we define this variable as well. */ | |
7c241325 | 38 | char *locs; |
1c70b6f1 | 39 | compat_symbol (libc, locs, locs, GLIBC_2_0); |
84384f5b UD |
40 | |
41 | ||
42 | /* Find the next match in STRING. The compiled regular expression is | |
43 | found in the buffer starting at EXPBUF. `loc1' will return the | |
44 | first character matched and `loc2' points to the next unmatched | |
45 | character. */ | |
46 | int | |
1c70b6f1 ZW |
47 | weak_function attribute_compat_text_section |
48 | step (const char *string, const char *expbuf) | |
84384f5b UD |
49 | { |
50 | regmatch_t match; /* We only need info about the full match. */ | |
51 | ||
52 | expbuf += __alignof (regex_t *); | |
53 | expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *); | |
54 | ||
49f3a758 | 55 | if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL) |
84384f5b UD |
56 | == REG_NOMATCH) |
57 | return 0; | |
58 | ||
59 | loc1 = (char *) string + match.rm_so; | |
60 | loc2 = (char *) string + match.rm_eo; | |
61 | return 1; | |
62 | } | |
1c70b6f1 | 63 | compat_symbol (libc, step, step, GLIBC_2_0); |
84384f5b UD |
64 | |
65 | ||
66 | /* Match the beginning of STRING with the compiled regular expression | |
67 | in EXPBUF. If the match is successful `loc2' will contain the | |
68 | position of the first unmatched character. */ | |
69 | int | |
1c70b6f1 ZW |
70 | weak_function attribute_compat_text_section |
71 | advance (const char *string, const char *expbuf) | |
84384f5b UD |
72 | { |
73 | regmatch_t match; /* We only need info about the full match. */ | |
74 | ||
75 | expbuf += __alignof__ (regex_t *); | |
76 | expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *); | |
77 | ||
49f3a758 | 78 | if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL) |
84384f5b UD |
79 | == REG_NOMATCH |
80 | /* We have to check whether the check is at the beginning of the | |
81 | buffer. */ | |
82 | || match.rm_so != 0) | |
83 | return 0; | |
84 | ||
85 | loc2 = (char *) string + match.rm_eo; | |
86 | return 1; | |
87 | } | |
1c70b6f1 ZW |
88 | compat_symbol (libc, advance, advance, GLIBC_2_0); |
89 | ||
90 | ||
91 | #endif /* SHLIB_COMPAT (2.0, 2.23) */ |