1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 /*
24  * Glenn Fowler
25  * AT&T Bell Laboratories
26  *
27  * hash table library
28  */
29 
30 #include "hashlib.h"
31 
32 /*
33  * return the hash of buffer s of length n
34  */
35 
36 unsigned int
memhash(const void * as,int n)37 memhash(const void* as, int n)
38 {
39 	register const unsigned char*	s = (const unsigned char*)as;
40 	register const unsigned char*	e = s + n;
41 	register unsigned int		c = 0;
42 
43 	while (s < e) HASHPART(c, *s++);
44 	return(c);
45 }
46