50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
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/* Copyright (C) 1989, 1990 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.uucp)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 1, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file LICENSE. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "ptable.h"
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unsigned hash_string(const char *s)
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{
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assert(s != 0);
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unsigned h = 0, g;
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while (*s != 0) {
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h <<= 4;
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h += *s++;
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if ((g = h & 0xf0000000) != 0) {
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h ^= g >> 24;
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h ^= g;
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}
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}
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return h;
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}
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static const int table_sizes[] = {
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101, 503, 1009, 2003, 3001, 4001, 5003, 10007, 20011, 40009,
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80021, 160001, 500009, 1000003, 2000003, 4000037, 8000009,
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16000057, 32000011, 64000031, 128000003, 0
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};
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int next_ptable_size(int n)
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{
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for (const int *p = table_sizes; *p <= n && *p != 0; p++)
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;
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assert(*p != 0);
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return *p;
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}
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