/*
 * 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
{
	/** Returns the closest power-of-two number greater or equal to value. */
	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;
	}

	/** Determines whether the number is power-of-two or not. */
	template<typename Type>
	static inline bool isPO2(Type _value)
	{
		return (_value & (_value - 1)) == 0;
	}
}

#endif // MYGUI_BITWISE_H_
