1  /* Scan memory for the first of two bytes.
       2     Copyright (C) 2008-2023 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  /* This file uses _GL_ATTRIBUTE_PURE.  */
      18  #if !_GL_CONFIG_H_INCLUDED
      19   #error "Please include config.h first."
      20  #endif
      21  
      22  #include <stddef.h>
      23  
      24  #ifdef __cplusplus
      25  extern "C" {
      26  #endif
      27  
      28  /* Return the first address of either C1 or C2 (treated as unsigned
      29     char) that occurs within N bytes of the memory region S.  If
      30     neither byte appears, return NULL.  */
      31  
      32  extern void *memchr2 (void const *s, int c1, int c2, size_t n)
      33    _GL_ATTRIBUTE_PURE;
      34  
      35  #ifdef __cplusplus
      36  }
      37  #endif