LinearCongruentialGenerator.h

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#ifndef ROSE_LinearCongruentialGenerator_H
#define ROSE_LinearCongruentialGenerator_H

#include <stdint.h>
#include <stdlib.h>

class LinearCongruentialGenerator {
public:
    LinearCongruentialGenerator() { init(); }

    LinearCongruentialGenerator(int seed): seed_(seed), value_(seed) {}

    void init();

    void reset() { value_=seed_; }

    void reseed(int seed) { value_ = seed_ = seed; }

    int seed() const { return seed_; }

    uint64_t again() const { return value_; }

    uint64_t max();

    uint64_t next(size_t nbits=64, size_t niter=1);
    uint64_t operator()() { return next(); }
    bool flip_coin();

protected:
    int seed_;
    uint64_t value_;
};

typedef LinearCongruentialGenerator LCG;

#endif