1 /*	$NetBSD: common.cpp,v 1.1.1.1 2016/01/13 18:41:48 christos Exp $	*/
2 
3 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
4      Written by James Clark (jjc@jclark.com)
5 
6 This file is part of groff.
7 
8 groff is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
11 version.
12 
13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16 for more details.
17 
18 You should have received a copy of the GNU General Public License along
19 with groff; see the file COPYING.  If not, write to the Free Software
20 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
21 
hash(const char * s,int len)22 unsigned hash(const char *s, int len)
23 {
24 #if 0
25   unsigned h = 0, g;
26   while (*s != '\0') {
27     h <<= 4;
28     h += *s++;
29     if ((g = h & 0xf0000000) != 0) {
30       h ^= g >> 24;
31       h ^= g;
32     }
33   }
34 #endif
35   unsigned h = 0;
36   while (--len >= 0)
37     h = *s++ + 65587*h;
38   return h;
39 }
40 
41