1  /* Copy memory to memory until the specified number of bytes
       2     has been copied with error checking.  Overlap is NOT handled correctly.
       3     Copyright (C) 1991-2023 Free Software Foundation, Inc.
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include <string.h>
      21  #include <memcopy.h>
      22  
      23  void *
      24  __memcpy_chk (void *dstpp, const void *srcpp, size_t len, size_t dstlen)
      25  {
      26    if (__glibc_unlikely (dstlen < len))
      27      __chk_fail ();
      28  
      29    return memcpy (dstpp, srcpp, len);
      30  }
      31  libc_hidden_builtin_def (__memcpy_chk)