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104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
/*
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* RandGen.hpp, part of LatAnalyze 3
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*
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* Copyright (C) 2013 - 2014 Antonin Portelli
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*
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* LatAnalyze 3 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 3 of the License, or
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* (at your option) any later version.
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*
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* LatAnalyze 3 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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*
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* You should have received a copy of the GNU General Public License
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* along with LatAnalyze 3. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef Latan_RandGen_hpp_
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#define Latan_RandGen_hpp_
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#include <latan/Global.hpp>
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#include <latan/IoObject.hpp>
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#define RLXG_STATE_SIZE 105u
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BEGIN_NAMESPACE
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class RandGenState: public Array<int, RLXG_STATE_SIZE, 1>,
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public IoObject
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{
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private:
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typedef Array<int, RLXG_STATE_SIZE, 1> Base;
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public:
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// destructor
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virtual ~RandGenState(void) = default;
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// IO type
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IoType getType(void) const;
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};
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/******************************************************************************
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* Random generator class *
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******************************************************************************/
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class RandGen
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{
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private:
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// Martin Luescher's ranlxd generator interface
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class RanLxd
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{
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private:
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typedef struct alignas(16)
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{
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float c1,c2,c3,c4;
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} rlxd_vec_t;
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typedef struct alignas(16)
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{
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rlxd_vec_t c1,c2;
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} rlxd_dble_vec_t;
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public:
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RanLxd(void);
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~RanLxd(void) = default;
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void ranlxd(double r[],int n);
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void rlxd_init(int level,int seed);
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int rlxd_size(void) const;
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void rlxd_get(int state[]) const;
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void rlxd_reset(const int state[]);
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private:
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void error(int no) const;
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void update(void);
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void define_constants(void);
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private:
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int init{0}, rlxd_pr, prm, ir, jr, is, is_old, next[96];
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rlxd_vec_t one_sse, one_bit_sse, carry;
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double one_bit;
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union alignas(16)
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{
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rlxd_dble_vec_t vec[12];
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float num[96];
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} rlxd_x;
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};
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public:
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// constructors
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RandGen(void);
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explicit RandGen(const int seed);
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explicit RandGen(const RandGenState &state);
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// destructor
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virtual ~RandGen(void) = default;
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// state management
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RandGenState getState(void) const;
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void setState(const RandGenState &state);
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// generators
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double uniform(const double a = 0.0, const double b = 1.0);
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double discreteUniform(const unsigned int n);
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double gaussian(const double mean = 0.0, const double sigma = 1.0);
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private:
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RanLxd generator_;
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};
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END_NAMESPACE
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#endif // Latan_RandGen_hpp_
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