random_number_generator.h

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#ifndef ARBITRARY_PRECISION_CALCULATION_RANDOM_NUMBER_GENERATOR_H_
#define ARBITRARY_PRECISION_CALCULATION_RANDOM_NUMBER_GENERATOR_H_

#include <fstream>
#include <gmp.h>
#include <string>

namespace arbitraryprecisioncalculation {

class RandomNumberGenerator{
public:
    virtual ~RandomNumberGenerator();
    virtual mpf_t* RandomMpft() = 0;
    virtual long long RandomLongLong() = 0;

    virtual void LoadData(std::ifstream* input_stream) = 0;
    virtual void StoreData(std::ofstream* output_stream) = 0;
    virtual std::string GetName() = 0;
};

class FastM2P63LinearCongruenceRandomNumberGenerator : public RandomNumberGenerator {
public:
    FastM2P63LinearCongruenceRandomNumberGenerator(unsigned long long multiplier, unsigned long long adder, unsigned long long seed);
    mpf_t* RandomMpft();
    long long RandomLongLong();

    void LoadData(std::ifstream*);
    void StoreData(std::ofstream*);
    std::string GetName();

private:
    const unsigned long long multiplier_;
    const unsigned long long adder_;
    const unsigned long long initial_seed_;
    unsigned long long seed_;
};

class IntenseM2P63LinearCongruenceRandomNumberGenerator : public RandomNumberGenerator {
public:
    IntenseM2P63LinearCongruenceRandomNumberGenerator(unsigned long long multiplier, unsigned long long adder, unsigned long long seed, int accept_bits);
    mpf_t* RandomMpft();
    long long RandomLongLong();

    void LoadData(std::ifstream*);
    void StoreData(std::ofstream*);
    std::string GetName();

private:
    const unsigned long long multiplier_;
    const unsigned long long adder_;
    const unsigned long long initial_seed_;
    unsigned long long seed_;
    int accept_bits_;
};

class FastLinearCongruenceRandomNumberGenerator : public RandomNumberGenerator {
public:
    FastLinearCongruenceRandomNumberGenerator(unsigned long long multiplier, unsigned long long adder, unsigned long long modulus, unsigned long long seed);
    mpf_t* RandomMpft();
    long long RandomLongLong();

    void LoadData(std::ifstream*);
    void StoreData(std::ofstream*);
    std::string GetName();

private:
    unsigned long long multiplier_;
    unsigned long long adder_;
    unsigned long long modulus_;
    const unsigned long long initial_seed_;
    unsigned long long seed_;
};

class IntenseLinearCongruenceRandomNumberGenerator : public RandomNumberGenerator {
public:
    IntenseLinearCongruenceRandomNumberGenerator(unsigned long long multiplier, unsigned long long adder, unsigned long long modulus, unsigned long long seed);
    mpf_t* RandomMpft();
    long long RandomLongLong();

    void LoadData(std::ifstream*);
    void StoreData(std::ofstream*);
    std::string GetName();

private:
    unsigned long long multiplier_;
    unsigned long long adder_;
    unsigned long long modulus_;
    const unsigned long long initial_seed_;
    unsigned long long seed_;
};

} // namespace arbitraryprecisioncalculation

#endif /* ARBITRARY_PRECISION_CALCULATION_RANDOM_NUMBER_GENERATOR_H_ */