obs-StreamFX/source/util/util-bitmask.hpp

71 lines
2.4 KiB
C++
Raw Normal View History

/*
* Modern effects for a modern Streamer
* Copyright (C) 2020 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#pragma once
#include "warning-disable.hpp"
#include <cstddef>
#include <type_traits>
#include "warning-enable.hpp"
template<typename Enum>
struct enable_bitmask_operators {
static const bool enable = false;
};
template<typename Enum>
typename std::enable_if<enable_bitmask_operators<Enum>::enable, Enum>::type operator|(Enum lhs, Enum rhs)
{
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<Enum>(static_cast<underlying>(lhs) | static_cast<underlying>(rhs));
}
template<typename Enum>
typename std::enable_if<enable_bitmask_operators<Enum>::enable, Enum>::type operator&(Enum lhs, Enum rhs)
{
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<Enum>(static_cast<underlying>(lhs) & static_cast<underlying>(rhs));
}
template<typename Enum>
typename std::enable_if<enable_bitmask_operators<Enum>::enable, bool>::type any(Enum lhs)
{
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<underlying>(lhs) != static_cast<underlying>(0);
}
template<typename Enum>
typename std::enable_if<enable_bitmask_operators<Enum>::enable, bool>::type exact(Enum lhs, Enum rhs)
{
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<underlying>(lhs) == static_cast<underlying>(rhs);
}
2021-04-26 02:19:45 +00:00
template<typename Enum>
typename std::enable_if<enable_bitmask_operators<Enum>::enable, bool>::type has(Enum lhs, Enum rhs)
{
using underlying = typename std::underlying_type<Enum>::type;
return (lhs & rhs) == rhs;
}
#define P_ENABLE_BITMASK_OPERATORS(x) \
template<> \
struct enable_bitmask_operators<x> { \
static const bool enable = true; \
};