| 1 | /* Compatibility symbols for the obsolete <regexp.h> interface. |
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| 2 | Copyright (C) 1996-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* regexp.h now contains only an #error directive, so it cannot be |
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| 20 | used in this file. |
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| 21 | |
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| 22 | The function that would produce an 'expbuf' to use as the second |
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| 23 | argument to 'step' and 'advance' was defined only in regexp.h, |
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| 24 | as its definition depended on macros defined by the user. */ |
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| 25 | |
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| 26 | #include <regex.h> |
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| 27 | #include <shlib-compat.h> |
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| 28 | |
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| 29 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23) |
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| 30 | |
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| 31 | /* Define the variables used for the interface. */ |
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| 32 | char *loc1; |
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| 33 | char *loc2; |
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| 34 | compat_symbol (libc, loc1, loc1, GLIBC_2_0); |
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| 35 | compat_symbol (libc, loc2, loc2, GLIBC_2_0); |
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| 36 | |
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| 37 | /* Although we do not support the use we define this variable as well. */ |
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| 38 | char *locs; |
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| 39 | compat_symbol (libc, locs, locs, GLIBC_2_0); |
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| 40 | |
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| 41 | |
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| 42 | /* Find the next match in STRING. The compiled regular expression is |
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| 43 | found in the buffer starting at EXPBUF. `loc1' will return the |
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| 44 | first character matched and `loc2' points to the next unmatched |
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| 45 | character. */ |
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| 46 | int |
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| 47 | weak_function attribute_compat_text_section |
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| 48 | step (const char *string, const char *expbuf) |
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| 49 | { |
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| 50 | regmatch_t match; /* We only need info about the full match. */ |
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| 51 | |
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| 52 | expbuf += __alignof (regex_t *); |
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| 53 | expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *); |
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| 54 | |
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| 55 | if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL) |
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| 56 | == REG_NOMATCH) |
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| 57 | return 0; |
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| 58 | |
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| 59 | loc1 = (char *) string + match.rm_so; |
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| 60 | loc2 = (char *) string + match.rm_eo; |
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| 61 | return 1; |
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| 62 | } |
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| 63 | compat_symbol (libc, step, step, GLIBC_2_0); |
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| 64 | |
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| 65 | |
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| 66 | /* Match the beginning of STRING with the compiled regular expression |
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| 67 | in EXPBUF. If the match is successful `loc2' will contain the |
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| 68 | position of the first unmatched character. */ |
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| 69 | int |
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| 70 | weak_function attribute_compat_text_section |
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| 71 | advance (const char *string, const char *expbuf) |
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| 72 | { |
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| 73 | regmatch_t match; /* We only need info about the full match. */ |
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| 74 | |
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| 75 | expbuf += __alignof__ (regex_t *); |
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| 76 | expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *); |
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| 77 | |
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| 78 | if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL) |
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| 79 | == REG_NOMATCH |
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| 80 | /* We have to check whether the check is at the beginning of the |
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| 81 | buffer. */ |
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| 82 | || match.rm_so != 0) |
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| 83 | return 0; |
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| 84 | |
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| 85 | loc2 = (char *) string + match.rm_eo; |
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| 86 | return 1; |
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| 87 | } |
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| 88 | compat_symbol (libc, advance, advance, GLIBC_2_0); |
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| 89 | |
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| 90 | |
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| 91 | #endif /* SHLIB_COMPAT (2.0, 2.23) */ |
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| 92 | |
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