 Copyright (c) 1992, 1995 John E. Davis
 All rights reserved.

 Permission is hereby granted, without written agreement and without license
 or royalty fees, to use, copy, and distribute this software and its
 documentation for any purpose, provided that the above copyright notice and
 the following two paragraphs appear in all copies of this software.
 Permission is not granted to modify this software for any purpose without
 submitting such modifications back to the author.

 IN NO EVENT SHALL JOHN E. DAVIS BE LIABLE TO ANY PARTY FOR DIRECT,
 INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
 THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOHN E. DAVIS
 HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 JOHN E. DAVIS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
 BASIS, AND JOHN E. DAVIS HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
 SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

