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