mirror of https://github.com/axmolengine/axmol.git
90 lines
7.4 KiB
C
90 lines
7.4 KiB
C
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/****************************************************************************
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Copyright (c) 2020 c4games.com.
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http://www.cocos2d-x.org
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Purpose: Make bitmask operators could be use at different namespace,
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the other implementation CCEnumClass.h can't handle.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include <type_traits>
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#if !defined(_STD)
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#define _STD ::std::
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#endif
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// BITMASK OPERATIONS, modified from msvc++ <type_traits> for cross-platform compiling.
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#define CC_ENABLE_BITMASK_OPS(_BITMASK) \
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constexpr _BITMASK operator&(_BITMASK _Left, _BITMASK _Right) noexcept { /* return _Left & _Right */ \
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using _IntTy = _STD underlying_type<_BITMASK>::type; \
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return static_cast<_BITMASK>(static_cast<_IntTy>(_Left) & static_cast<_IntTy>(_Right)); \
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} \
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\
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constexpr _BITMASK operator|(_BITMASK _Left, _BITMASK _Right) noexcept { /* return _Left | _Right */ \
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using _IntTy = _STD underlying_type<_BITMASK>::type; \
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return static_cast<_BITMASK>(static_cast<_IntTy>(_Left) | static_cast<_IntTy>(_Right)); \
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} \
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\
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constexpr _BITMASK operator^(_BITMASK _Left, _BITMASK _Right) noexcept { /* return _Left ^ _Right */ \
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using _IntTy = _STD underlying_type<_BITMASK>::type; \
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return static_cast<_BITMASK>(static_cast<_IntTy>(_Left) ^ static_cast<_IntTy>(_Right)); \
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} \
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\
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constexpr _BITMASK& operator&=(_BITMASK& _Left, _BITMASK _Right) noexcept { /* return _Left &= _Right */ \
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return _Left = _Left & _Right; \
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} \
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\
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constexpr _BITMASK& operator|=(_BITMASK& _Left, _BITMASK _Right) noexcept { /* return _Left |= _Right */ \
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return _Left = _Left | _Right; \
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} \
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\
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constexpr _BITMASK& operator^=(_BITMASK& _Left, _BITMASK _Right) noexcept { /* return _Left ^= _Right */ \
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return _Left = _Left ^ _Right; \
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} \
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\
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constexpr _BITMASK operator~(_BITMASK _Left) noexcept { /* return ~_Left */ \
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using _IntTy = _STD underlying_type<_BITMASK>::type; \
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return static_cast<_BITMASK>(~static_cast<_IntTy>(_Left)); \
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} \
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\
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constexpr bool _Bitmask_includes( \
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_BITMASK _Left, _BITMASK _Elements) noexcept { /* return (_Left & _Elements) != _BITMASK{} */ \
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return (_Left & _Elements) != _BITMASK{}; \
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} \
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\
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constexpr bool _Bitmask_includes_all( \
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_BITMASK _Left, _BITMASK _Elements) noexcept { /* return (_Left & _Elements) == _Elements */ \
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return (_Left & _Elements) == _Elements; \
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}
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// BITSHIFT OPERATIONS, inspired from msvc++ <type_traits>.
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#define CC_ENABLE_BITSHIFT_OPS(_BITMASK) \
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constexpr _BITMASK operator>>(_BITMASK _Left, _BITMASK _Right) noexcept { /* return _Left & _Right */ \
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using _IntTy = _STD underlying_type<_BITMASK>::type; \
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return static_cast<_BITMASK>(static_cast<_IntTy>(_Left) >> static_cast<_IntTy>(_Right)); \
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} \
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\
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constexpr _BITMASK operator<<(_BITMASK _Left, _BITMASK _Right) noexcept { /* return _Left & _Right */ \
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using _IntTy = _STD underlying_type<_BITMASK>::type; \
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return static_cast<_BITMASK>(static_cast<_IntTy>(_Left) << static_cast<_IntTy>(_Right)); \
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}
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