/*
 * memcpy - copy bytes
 */

VOIDSTAR
memcpy(dst, src, size)
VOIDSTAR dst;
CONST VOIDSTAR src;
SIZET size;
{
         register char *d;
         register CONST char *s;
         register SIZET n;

         if (size <= 0)
                   return(dst);

         s = src;
         d = dst;
         if (s <= d && s + (size-1) >= d) {
                   /* Overlap, must copy right-to-left. */
                   s += size-1;
                   d += size-1;
                   for (n = size; n > 0; n--)
                             *d-- = *s--;
         } else
                   for (n = size; n > 0; n--)
                             *d++ = *s++;

         return(dst);
}