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/*
Copyright (C) 2003-2008 Fons Adriaensen <fons@kokkinizita.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __RNGEN_H
#define __RNGEN_H
#include "prbsgen.h"
class Rngen
{
public:
Rngen (void);
void init (uint32_t seed);
uint32_t irand (void)
{
uint32_t r;
if (++_i == 55) _i = 0;
if (_i < 24) r = _a [_i] += _a [_i + 31];
else r = _a [_i] += _a [_i - 24];
return r;
}
double urand (void) { return irand () / _p32; }
double grand (void);
void grand (double *x, double *y);
float urandf (void) { return irand () / _p32f; }
float grandf (void);
void grandf (float *x, float *y);
~Rngen (void);
Rngen (const Rngen&); // disabled, not to be used
Rngen& operator=(const Rngen&); // disabled, not to be used
private:
uint32_t _a [55];
int _i;
bool _md;
bool _mf;
double _vd;
float _vf;
static const double _p31;
static const double _p32;
static const float _p31f;
static const float _p32f;
};
#endif
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