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