/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2021  PCSX2 Dev Team
 *
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once
#include "common/Pcsx2Defs.h"

namespace Common
{
	template <typename T>
	static constexpr __fi bool IsAligned(T value, unsigned int alignment)
	{
		return (value % static_cast<T>(alignment)) == 0;
	}

	template <typename T>
	static constexpr __fi T AlignUp(T value, unsigned int alignment)
	{
		return (value + static_cast<T>(alignment - 1)) / static_cast<T>(alignment) * static_cast<T>(alignment);
	}

	template <typename T>
	static constexpr __fi T AlignDown(T value, unsigned int alignment)
	{
		return value / static_cast<T>(alignment) * static_cast<T>(alignment);
	}

	template <typename T>
	static constexpr __fi bool IsAlignedPow2(T value, unsigned int alignment)
	{
		return (value & static_cast<T>(alignment - 1)) == 0;
	}

	template <typename T>
	static constexpr __fi T AlignUpPow2(T value, unsigned int alignment)
	{
		return (value + static_cast<T>(alignment - 1)) & static_cast<T>(~static_cast<T>(alignment - 1));
	}

	template <typename T>
	static constexpr __fi T AlignDownPow2(T value, unsigned int alignment)
	{
		return value & static_cast<T>(~static_cast<T>(alignment - 1));
	}

	template <typename T>
	static constexpr __fi bool IsPow2(T value)
	{
		return (value & (value - 1)) == 0;
	}

	template <typename T>
	static constexpr __fi T PreviousPow2(T value)
	{
		if (value == static_cast<T>(0))
			return 0;

		value |= (value >> 1);
		value |= (value >> 2);
		value |= (value >> 4);
		value |= (value >> 8);
		value |= (value >> 16);
		return value - (value >> 1);
	}

	template<typename T>
	static constexpr __fi T NextPow2(T value)
	{
		if (value == static_cast<T>(0))
			return 0;

		value--;
		value |= value >> 1;
		value |= value >> 2;
		value |= value >> 4;
		value |= value >> 8;
		value |= value >> 16;
		value++;
		return value;
	}
} // namespace Common