LinearCongruentialGenerator.h

#ifndef ROSE_LinearCongruentialGenerator_H
#define ROSE_LinearCongruentialGenerator_H
 
#include <stdint.h>
#include <stdlib.h>
#include "rosedll.h"
 
class ROSE_UTIL_API 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