Copyright (c) 2001, David N. Main, All rights reserved.
  
  Redistribution and use in source and binary forms, with or
  without modification, are permitted provided that the 
  following conditions are met:
 
  1. Redistributions of source code must retain the above 
  copyright notice, this list of conditions and the following 
  disclaimer. 
  
  2. Redistributions in binary form must reproduce the above 
  copyright notice, this list of conditions and the following 
  disclaimer in the documentation and/or other materials 
  provided with the distribution.
  
  3. The name of the author may not be used to endorse or 
  promote products derived from this software without specific 
  prior written permission. 
  
  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY 
  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 
  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
  AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
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  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.