/* 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>.  */

#if HAVE_CONFIG_H

#include <config.h>

#endif

void *

memmove (destaddr, sourceaddr, length)

     void *destaddr;

     const void *sourceaddr;

     unsigned length;

{

  char *dest = destaddr;

  const char *source = sourceaddr;

  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 destaddr;

}