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/* Copyright (C) 2010 webis.de
 * All rights reserved.
 */
#ifndef AITOOLS_INVERTEDINDEX_CONVERTER_HPP
#define AITOOLS_INVERTEDINDEX_CONVERTER_HPP

#include <stdint.h>
#include <typeinfo>
#include <string>

namespace aitools {
namespace invertedindex {

class Converter {

private: // ctor / dtor

        Converter();

        ~Converter();

public: // methods

        static uint32_t str_to_ui32(const std::string& str);

        static uint64_t str_to_ui64(const std::string& str);

        static std::string ui32_to_str(uint32_t number);

        static std::string ui64_to_str(uint64_t number);

        static std::string float_to_str(float number);

        static std::string double_to_str(double number);

        template<typename T>
        static std::string nameof();

};

// IMPLEMENTATION

template<typename T>
std::string
Converter::nameof()
{
        // character
        if (typeid(T) == typeid(char)) return "char";
        else if (typeid(T) == typeid(wchar_t)) return "wchar_t";
        // signed integer
        else if (typeid(T) == typeid(int8_t)) return "int8_t";
        else if (typeid(T) == typeid(int16_t)) return "int16_t";
        else if (typeid(T) == typeid(int32_t)) return "int32_t";
        else if (typeid(T) == typeid(int64_t)) return "int64_t";
        // unsigned integer
        else if (typeid(T) == typeid(uint8_t)) return "uint8_t";
        else if (typeid(T) == typeid(uint16_t)) return "uint16_t";
        else if (typeid(T) == typeid(uint32_t)) return "uint32_t";
        else if (typeid(T) == typeid(uint64_t)) return "uint64_t";
        // floating point
        else if (typeid(T) == typeid(float)) return "float";
        else if (typeid(T) == typeid(double)) return "double";
        // all other types
        else return std::string(typeid(T).name());
}

} // namespace invertedindex
} // namespace aitools

#endif // AITOOLS_INVERTEDINDEX_CONVERTER_HPP

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