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/* bcopy -- copy memory regions of arbitary length

NAME

        bcopy -- copy memory regions of arbitrary length

SYNOPSIS

        void bcopy (char *in, char *out, int length)

DESCRIPTION

        Copy LENGTH bytes from memory region pointed to by IN to memory

        region pointed to by OUT.

BUGS

        Significant speed improvements can be made in some cases by

        implementing copies of multiple bytes simultaneously, or unrolling

        the copy loop.

*/

void

bcopy (src, dest, len)

  register char *src, *dest;

  int len;

{

  if (dest < src)

    while (len--)

      *dest++ = *src++;

  else

    {

      char *lasts = src + (len-1);

      char *lastd = dest + (len-1);

      while (len--)

        *(char *)lastd-- = *(char *)lasts--;

    }

}