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