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#include <config.h>
7
8#include <stddef.h>
9
10void *
11memmove (void *dest0, void const *source0, size_t length)
12{
13  char *dest = dest0;
14  char const *source = source0;
15  if (source < dest)
16    /* Moving from low mem to hi mem; start at end.  */
17    for (source += length, dest += length; length; --length)
18      *--dest = *--source;
19  else if (source != dest)
20    {
21      /* Moving from hi mem to low mem; start at beginning.  */
22      for (; length; --length)
23        *dest++ = *source++;
24    }
25  return dest0;
26}
27