| 1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <string.h> |
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| 19 | #include <libc-diag.h> |
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| 20 | |
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| 21 | #ifndef RAWMEMCHR |
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| 22 | # define RAWMEMCHR __rawmemchr |
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| 23 | #endif |
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| 24 | |
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| 25 | /* The pragmata should be nested inside RAWMEMCHR below, but that |
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| 26 | triggers GCC PR 98512. */ |
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| 27 | DIAG_PUSH_NEEDS_COMMENT; |
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| 28 | #if __GNUC_PREREQ (7, 0) |
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| 29 | /* GCC 8 warns about the size passed to memchr being larger than |
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| 30 | PTRDIFF_MAX; the use of SIZE_MAX is deliberate here. */ |
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| 31 | DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-overflow=" ); |
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| 32 | #endif |
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| 33 | #if __GNUC_PREREQ (11, 0) |
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| 34 | /* Likewise GCC 11, with a different warning option. */ |
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| 35 | DIAG_IGNORE_NEEDS_COMMENT (11, "-Wstringop-overread" ); |
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| 36 | #endif |
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| 37 | |
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| 38 | /* Find the first occurrence of C in S. */ |
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| 39 | void * |
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| 40 | RAWMEMCHR (const void *s, int c) |
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| 41 | { |
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| 42 | if (c != '\0') |
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| 43 | return memchr (s, c, (size_t)-1); |
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| 44 | return (char *)s + strlen (s); |
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| 45 | } |
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| 46 | libc_hidden_def (__rawmemchr) |
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| 47 | weak_alias (__rawmemchr, rawmemchr) |
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| 48 | |
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| 49 | DIAG_POP_NEEDS_COMMENT; |
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| 50 | |
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