* Copyright 1994, Roger Smith for Sterling Software and NASA-Ames Research Center
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any 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, and that the name of NASA and Sterling Software (collectively 
 * or individually) are not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  NASA and Sterling Software makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * NASA & STERLING SOFTWARE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NASA & STERLING SOFTWARE
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * 1994 Revision
 * Author:           Roger Smith, Sterling Software @ NASA-Ames Research Center
 *                   Moffett Field, California, rsmith@proteus.arc.nasa.gov