FloatSpecs.h

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#ifndef FLOATSPECS_H
#define FLOATSPECS_H

#include <float.h>

template < class Float >
class FloatSpecs {
public:
    Float ETA;      
    Float BASE;     
    Float INFINY;   
    Float SMALNO;   
    Float ARE;      
    Float MRE;      
    Float LOG_BASE; 
public:
    FloatSpecs() {
        initConstants();
    }

private:

    void initConstants() {
        getFPSpecs(ETA, INFINY, SMALNO, BASE);
        ARE = ETA;
        MRE = 2 * sqrt(Float(2.0)) * ETA;
        LOG_BASE = log(BASE);
    }

    static inline void getFPSpecs(float & eta, float & infiny, float & smalno, float & base) {
        base = FLT_RADIX;
        eta = FLT_EPSILON;
        infiny = FLT_MAX;
        smalno = FLT_MIN;
    }

    static inline void getFPSpecs(double & eta, double & infiny, double & smalno, double & base) {
        base = DBL_RADIX;
        eta = DBL_EPSILON;
        infiny = DBL_MAX;
        smalno = DBL_MIN;
    }

    static inline void getFPSpecs(long double & eta, long double & infiny, long double & smalno, long double & base) {
        base = LDBL_RADIX;
        eta = LDBL_EPSILON;
        infiny = LDBL_MAX;
        smalno = LDBL_MIN;
    }
};

#endif //FLOATSPECS_H

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