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5188644e75
This gives QF a consistent qualilty PRNG on all platforms. The implementation is slightly different from the standard, but gives the same results for the same speed (details in mersenne.c).
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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mersenne.h
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Mersenne Twister PRNG
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Copyright (C) 2013 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2013/01/21
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifndef __QF_mersenne_h
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#define __QF_mersenne_h
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#include "QF/qtypes.h"
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#define MT_STATE_SIZE 624
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typedef struct {
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uint32_t state[MT_STATE_SIZE];
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int index;
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} mtstate_t;
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void mtwist_seed (mtstate_t *state, uint32_t seed);
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uint32_t mtwist_rand (mtstate_t *state);
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#endif//__QF_mersenne_h
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