/* memmove.c -- copy memory.

   Copy LENGTH bytes from SOURCE to DEST.  Does not null-terminate.

   In the public domain.

   By David MacKenzie <djm@gnu.ai.mit.edu>.  */

#include <config.h>

#include <stddef.h>

void *

memmove (void *dest0, void const *source0, size_t length)

{

  char *dest = dest0;

  char const *source = source0;

  if (source < dest)

    /* Moving from low mem to hi mem; start at end.  */

    for (source += length, dest += length; length; --length)

      *--dest = *--source;

  else if (source != dest)

    {

      /* Moving from hi mem to low mem; start at beginning.  */

      for (; length; --length)

        *dest++ = *source++;

    }

  return dest0;

}