/* Copyright (c) 1992, 1993 by John E. Davis
   davis@amy.tch.harvard.edu

   Permission to use, copy, modify, and distribute this software and its
   documentation for any non-commercial purpose and without fee is hereby
   granted, provided that the above copyright notice appear in all copies
   and that both that copyright notice and this permission notice appear in
   supporting documentation.

   This software is provided AS IS with no warranties of any kind.  The author
   shall have no liability with respect to the infringement of copyrights,
   trade secrets or any patents by this software or any part thereof.  In no
   event will the author be liable for any lost revenue or profits or other
   special, indirect and consequential damages. */