CommonBits.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2005-2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************/

#ifndef GEOS_PRECISION_COMMONBITS_H
#define GEOS_PRECISION_COMMONBITS_H

#include <geos/export.h>
#include <geos/constants.h> // for int64

namespace geos {
namespace precision { // geos.precision

class GEOS_DLL CommonBits {

private:

    bool isFirst;

    int commonMantissaBitsCount;

    int64 commonBits;

    int64 commonSignExp;

public:

    static int64 signExpBits(int64 num);

    static int numCommonMostSigMantissaBits(int64 num1, int64 num2);

    static int64 zeroLowerBits(int64 bits, int nBits);

    static int getBit(int64 bits, int i);

    CommonBits();

    void add(double num);

    double getCommon();

};

} // namespace geos.precision
} // namespace geos

#endif // GEOS_PRECISION_COMMONBITS_H