lib/memcpy.c

   1 /* Copyright (C) 1995, 1997, 2000, 2003, 2006, 2009-2018 Free Software
   2  * 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 /* Written by Jim Meyering <meyering@na-net.ornl.gov>.  */
  18
  19 #include <config.h>
  20
  21 #include <stddef.h>
  22
  23 /* Copy LEN bytes starting at SRCADDR to DESTADDR.  Result undefined
  24    if the source overlaps with the destination.
  25    Return DESTADDR. */
  26
  27 void *
  28 memcpy (void *destaddr, void const *srcaddr, size_t len)
  29 {
  30   char *dest = destaddr;
  31   char const *src = srcaddr;
  32
  33   while (len-- > 0)
  34     *dest++ = *src++;
  35   return destaddr;
  36 }