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