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 20#include "ptable.h" 21#include "errarg.h" 22#include "error.h" 23 24unsigned long hash_string(const char *s) 25{ 26 assert(s != 0); 27 unsigned long h = 0, g; 28 while (*s != 0) { 29 h <<= 4; 30 h += *s++; 31 if ((g = h & 0xf0000000) != 0) { 32 h ^= g >> 24; 33 h ^= g; 34 } 35 } 36 return h; 37} 38 39static const unsigned table_sizes[] = { 40101, 503, 1009, 2003, 3001, 4001, 5003, 10007, 20011, 40009, 4180021, 160001, 500009, 1000003, 2000003, 4000037, 8000009, 4216000057, 32000011, 64000031, 128000003, 0 43}; 44 45unsigned next_ptable_size(unsigned n) 46{ 47 const unsigned *p; 48 for (p = table_sizes; *p <= n; p++) 49 if (*p == 0) 50 fatal("cannot expand table"); 51 return *p; 52} 53