1  /* Copyright (C) 1991-2023 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  
      20  #undef __memccpy
      21  #undef memccpy
      22  
      23  #ifdef MEMCCPY
      24  # define __memccpy MEMCCPY
      25  #endif
      26  
      27  /* Copy no more than N bytes of SRC to DEST, stopping when C is found.
      28     Return the position in DEST one byte past where C was copied, or
      29     NULL if C was not found in the first N bytes of SRC.  */
      30  void *
      31  __memccpy (void *dest, const void *src, int c, size_t n)
      32  {
      33    void *p = memchr (src, c, n);
      34  
      35    if (p != NULL)
      36      return __mempcpy (dest, src, p - src + 1);
      37  
      38    memcpy (dest, src, n);
      39    return NULL;
      40  }
      41  
      42  weak_alias (__memccpy, memccpy)