MyGUI_Version.h

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */

#ifndef __MYGUI_VERSION_H__
#define __MYGUI_VERSION_H__

#include "MyGUI_Prerequest.h"
#include "MyGUI_Types.h"
#include "MyGUI_StringUtility.h"

namespace MyGUI
{

    class MYGUI_EXPORT Version
    {
    public:

        Version(unsigned int _major = 0, unsigned int _minor = 0, unsigned int _patch = 0) :
            mMajor(_major),
            mMinor(_minor),
            mPatch(_patch)
        {
        }

        friend bool operator < (Version const& a, Version const& b)
        {
            return (a.mMajor < b.mMajor) ? true : (a.mMinor < b.mMinor);
        }

        friend bool operator >= (Version const& a, Version const& b)
        {
            return !(a < b);
        }

        friend bool operator > (Version const& a, Version const& b)
        {
            return (b < a);
        }

        friend bool operator <= (Version const& a, Version const& b)
        {
            return !(a > b);
        }

        friend bool operator == (Version const& a, Version const& b)
        {
            return !(a < b) && !(a > b);
        }

        friend bool operator != (Version const& a, Version const& b)
        {
            return !(a == b);
        }

        friend std::ostream& operator << (std::ostream& _stream, const Version&  _value)
        {
            _stream << _value.print();
            return _stream;
        }

        friend std::istream& operator >> (std::istream& _stream, Version&  _value)
        {
            std::string value;
            _stream >> value;
            _value = parse(value);
            return _stream;
        }

        unsigned int getMajor() const
        {
            return mMajor;
        }

        unsigned int getMinor() const
        {
            return mMinor;
        }

        unsigned int getPatch() const
        {
            return mPatch;
        }

        std::string print() const
        {
            if (mPatch == 0)
                return utility::toString(mMajor, ".", mMinor);
            return utility::toString(mMajor, ".", mMinor, ".", mPatch);
        }

        static Version parse(const std::string& _value)
        {
            const std::vector<std::string>& vec = utility::split(_value, ".");
            if (vec.empty())
                return Version();

            unsigned int major = utility::parseValue<unsigned int>(vec[0]);
            unsigned int minor = vec.size() > 1 ? utility::parseValue<unsigned int>(vec[1]) : 0;
            unsigned int patch = vec.size() > 2 ? utility::parseValue<unsigned int>(vec[2]) : 0;

            return Version(major, minor, patch);
        }

    private:
        unsigned mMajor : 8;
        unsigned mMinor : 8;
        unsigned mPatch : 16;
    };

} // namespace MyGUI

#endif // __MYGUI_VERSION_H__