1 /* Scan memory for the first of two bytes.
2 Copyright (C) 2008-2021 Free Software Foundation, Inc.
3
4 This file is free software: you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
8
9 This file 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
12 GNU Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 #include <stddef.h>
18
19 #ifdef __cplusplus
20 extern "C" {
21 #endif
22
23 /* Return the first address of either C1 or C2 (treated as unsigned
24 char) that occurs within N bytes of the memory region S. If
25 neither byte appears, return NULL. */
26
27 extern void *memchr2 (void const *s, int c1, int c2, size_t n)
28 _GL_ATTRIBUTE_PURE;
29
30 #ifdef __cplusplus
31 }
32 #endif