* Copyright (c) 1983 Regents of the University of California. 
* All rights reserved. 
* 
* Redistribution and use in source and binary forms are permitted 
* provided that the above copyright notice and this paragraph are 
* duplicated in all such forms and that any documentation, 
* advertising materials, and other materials related to such 
* distribution and use acknowledge that the software was developed 
* by the University of California, Berkeley. The name of the 
* University may not be used to endorse or promote products derived 
* from this software without specific prior written permission. 
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.