MyGUI_Bitwise.h

Go to the documentation of this file.

/*
 * 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_BITWISE_H_
#define MYGUI_BITWISE_H_
 
#include "MyGUI_Prerequest.h"
 
namespace MyGUI::Bitwise
{
    template<typename Type>
    static inline Type firstPO2From(Type _value)
    {
        --_value;
        _value |= _value >> 16;
        _value |= _value >> 8;
        _value |= _value >> 4;
        _value |= _value >> 2;
        _value |= _value >> 1;
        ++_value;
        return _value;
    }
 
    template<typename Type>
    static inline bool isPO2(Type _value)
    {
        return (_value & (_value - 1)) == 0;
    }
}
 
#endif // MYGUI_BITWISE_H_