1/*	$NetBSD: memmove.c,v 1.1.1.1 2016/01/14 00:11:29 christos Exp $	*/
2
3/* memmove.c -- copy memory.
4   Copy LENGTH bytes from SOURCE to DEST.  Does not null-terminate.
5   In the public domain.
6   By David MacKenzie <djm@gnu.ai.mit.edu>.  */
7
8#if HAVE_CONFIG_H
9# include <config.h>
10#endif
11
12#include <stddef.h>
13
14void *
15memmove (void *dest0, void const *source0, size_t length)
16{
17  char *dest = dest0;
18  char const *source = source0;
19  if (source < dest)
20    /* Moving from low mem to hi mem; start at end.  */
21    for (source += length, dest += length; length; --length)
22      *--dest = *--source;
23  else if (source != dest)
24    {
25      /* Moving from hi mem to low mem; start at beginning.  */
26      for (; length; --length)
27	*dest++ = *source++;
28    }
29  return dest0;
30}
31