MyGUI_LogLevel.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_LOG_LEVEL_H_
#define MYGUI_LOG_LEVEL_H_
 
#include "MyGUI_Prerequest.h"
#include <string>
#include <cstring>
#include <iostream>
 
namespace MyGUI
{
 
    struct MYGUI_EXPORT LogLevel
    {
        enum Enum
        {
            Info, // Информационное сообщение.
            Warning, // Несущественная проблема.
            Error, // Устранимая ошибка.
            Critical, // Неустранимая ошибка или сбой в работе приложения.
            MAX
        };
 
        LogLevel() :
            mValue(Info)
        {
        }
 
        LogLevel(Enum _value) :
            mValue(_value)
        {
        }
 
        static LogLevel parse(const std::string& _value)
        {
            LogLevel type;
            int value = 0;
            while (true)
            {
                const char* name = type.getValueName(value);
                if (strcmp(name, "") == 0 || name == _value)
                    break;
                value++;
            }
            type.mValue = (Enum)value;
            return type;
        }
 
        friend bool operator < (LogLevel const& a, LogLevel const& b)
        {
            return a.mValue < b.mValue;
        }
 
        friend bool operator >= (LogLevel const& a, LogLevel const& b)
        {
            return !(a < b);
        }
 
        friend bool operator > (LogLevel const& a, LogLevel const& b)
        {
            return (b < a);
        }
 
        friend bool operator <= (LogLevel const& a, LogLevel const& b)
        {
            return !(a > b);
        }
 
        friend bool operator == (LogLevel const& a, LogLevel const& b)
        {
            return !(a < b) && !(a > b);
        }
 
        friend bool operator != (LogLevel const& a, LogLevel const& b)
        {
            return !(a == b);
        }
 
        friend std::ostream& operator << (std::ostream& _stream, const LogLevel&  _value)
        {
            _stream << _value.getValueName(_value.mValue);
            return _stream;
        }
 
        friend std::istream& operator >> (std::istream& _stream, LogLevel&  _value)
        {
            std::string value;
            _stream >> value;
            _value = parse(value);
            return _stream;
        }
 
        std::string print() const
        {
            return getValueName(mValue);
        }
 
        int getValue() const
        {
            return mValue;
        }
 
    private:
        const char* getValueName(int _index) const
        {
            static const char* values[MAX + 1] = { "Info", "Warning", "Error", "Critical", "" };
            return values[(_index < MAX && _index >= 0) ? _index : MAX];
        }
 
    private:
        Enum mValue;
    };
 
} // namespace MyGUI
 
#endif // MYGUI_LOG_LEVEL_H_