1  /* Scan memory for the first of two bytes.
       2     Copyright (C) 2008-2021 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation; either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program 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 General Public License for more details.
      13  
      14     You should have received a copy of the GNU 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