common.cpp revision 151498
1/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc. 2 Written by James Clark (jjc@jclark.com) 3 4This file is part of groff. 5 6groff is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 2, or (at your option) any later 9version. 10 11groff is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License along 17with groff; see the file COPYING. If not, write to the Free Software 18Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20unsigned hash(const char *s, int len) 21{ 22#if 0 23 unsigned h = 0, g; 24 while (*s != '\0') { 25 h <<= 4; 26 h += *s++; 27 if ((g = h & 0xf0000000) != 0) { 28 h ^= g >> 24; 29 h ^= g; 30 } 31 } 32#endif 33 unsigned h = 0; 34 while (--len >= 0) 35 h = *s++ + 65587*h; 36 return h; 37} 38 39