Units.h

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/*
 * Fimex
 *
 * (C) Copyright 2008, met.no
 *
 * Project Info:  https://wiki.met.no/fimex/start
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 */

#ifndef UNITS_H_
#define UNITS_H_

#include <string>
#include "fimex/CDMException.h"
#include "fimex/UnitsConverter.h"
#include <boost/shared_ptr.hpp>

namespace MetNoFimex
{

class UnitException : public CDMException
{
public:
    UnitException() {}
    UnitException(std::string message) : CDMException(message) {}
};

class Units
{
    friend class TimeUnit;
public:
    Units();
    Units(const Units& rhs);
    Units& operator=(const Units& rhs);
    virtual ~Units();
    void convert(const std::string& from, const std::string& to, double& slope, double& offset);
    boost::shared_ptr<UnitsConverter> getConverter(const std::string& from, const std::string& to);
    bool areConvertible(const std::string& unit1, const std::string& unit2) const;
    bool isTime(const std::string& timeUnit) const;
    static bool unload(bool force = false) throw(UnitException);
private:
    const void* exposeInternals() const;
};

void handleUdUnitError(int unitErrCode, const std::string& message = "") throw(UnitException);

}

#endif /*UNITS_H_*/