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/*
* Copyright (c) 1998, 1999, 2000, 2003 Virtual Unlimited B.V.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*!\file mtprng.h
* \brief Mersenne Twister pseudo-random number generator, headers.
* \author Bob Deblier <bob@virtualunlimited.com>
* \ingroup PRNG_m
*/
#ifndef _MTPRNG_H
#define _MTPRNG_H
#include "beecrypt.h"
#if WIN32
# include <windows.h>
# include <winbase.h>
#else
# if HAVE_THREAD_H && HAVE_SYNCH_H
# include <synch.h>
# elif HAVE_PTHREAD_H
# include <pthread.h>
# else
# error need locking mechanism
# endif
#endif
#define N 624
#define M 397
#define K 0x9908B0DF
/**
*/
typedef struct
{
#ifdef _REENTRANT
# if WIN32
HANDLE lock;
# else
# if HAVE_THREAD_H && HAVE_SYNCH_H
mutex_t lock;
# elif HAVE_PTHREAD_H
pthread_mutex_t lock;
# else
# error need locking mechanism
# endif
# endif
#endif
uint32_t state[N+1];
uint32_t left;
/*@kept@*/
uint32_t* nextw;
} mtprngParam;
#ifdef __cplusplus
extern "C" {
#endif
/**
*/
/*@observer@*/ /*@checked@*/
extern BEECRYPTAPI const randomGenerator mtprng;
/**
*/
/*@-exportlocal@*/
BEECRYPTAPI
int mtprngSetup (mtprngParam* mp)
/*@modifies mp @*/;
/*@=exportlocal@*/
/**
*/
/*@-exportlocal@*/
BEECRYPTAPI
int mtprngSeed (mtprngParam* mp, const uint32_t* data, int size)
/*@modifies mp @*/;
/*@=exportlocal@*/
/**
*/
/*@-exportlocal@*/
BEECRYPTAPI
int mtprngNext (mtprngParam* mp, uint32_t* data, int size)
/*@modifies mp, data @*/;
/*@=exportlocal@*/
/**
*/
/*@-exportlocal@*/
BEECRYPTAPI
int mtprngCleanup(mtprngParam* mp)
/*@modifies mp @*/;
/*@=exportlocal@*/
#ifdef __cplusplus
}
#endif
#endif
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