units.hpp

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#pragma once
#include "../defs.h"
#include <string>
#include <memory>
namespace icedb {
    namespace units {
        namespace implementations { struct Unithandler; struct spectralUnits; struct simpleUnits; }
        typedef std::shared_ptr<const implementations::Unithandler> Unithandler_p;
        class converter;
        typedef std::shared_ptr<const converter> converter_p;
        class converter
        {
        public:
            virtual ~converter();
            virtual double convert(double inVal) const;
            static bool canConvert(const std::string &inUnits, const std::string &outUnits);
            static std::shared_ptr<const converter> generate(
                const std::string &inUnits, const std::string& outUnits);
            bool isValid() const;
            converter(const std::string &inUnits, const std::string &outUnits);
        protected:
            static Unithandler_p getConverter(
                const std::string &inUnits, const std::string &outUnits);
            converter();
            Unithandler_p h;
            friend struct implementations::spectralUnits;
            friend struct implementations::simpleUnits;
            friend struct implementations::Unithandler;
        };

        class conv_spec : public converter
        {
        public:
            conv_spec(const std::string &inUnits, const std::string &outUnits);
            static std::shared_ptr<const converter> generate(
                const std::string &inUnits, const std::string& outUnits);
        };
    }
 }