100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
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/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TNT_UTILS_BITMASKENUM_H
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#define TNT_UTILS_BITMASKENUM_H
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#include <utils/compiler.h>
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#include <type_traits> // for std::false_type
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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namespace utils {
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template<typename Enum>
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struct EnableBitMaskOperators : public std::false_type { };
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} // namespace utils
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr bool operator!(Enum rhs) noexcept {
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using underlying = std::underlying_type_t<Enum>;
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return underlying(rhs) == 0;
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr Enum operator~(Enum rhs) noexcept {
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using underlying = std::underlying_type_t<Enum>;
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return Enum(~underlying(rhs));
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr Enum operator|(Enum lhs, Enum rhs) noexcept {
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using underlying = std::underlying_type_t<Enum>;
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return Enum(underlying(lhs) | underlying(rhs));
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr Enum operator&(Enum lhs, Enum rhs) noexcept {
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using underlying = std::underlying_type_t<Enum>;
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return Enum(underlying(lhs) & underlying(rhs));
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr Enum operator^(Enum lhs, Enum rhs) noexcept {
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using underlying = std::underlying_type_t<Enum>;
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return Enum(underlying(lhs) ^ underlying(rhs));
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr Enum operator|=(Enum& lhs, Enum rhs) noexcept {
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return lhs = lhs | rhs;
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr Enum operator&=(Enum& lhs, Enum rhs) noexcept {
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return lhs = lhs & rhs;
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr Enum operator^=(Enum& lhs, Enum rhs) noexcept {
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return lhs = lhs ^ rhs;
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr bool none(Enum lhs) noexcept {
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return !lhs;
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}
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template<typename Enum, typename std::enable_if_t<
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std::is_enum<Enum>::value && utils::EnableBitMaskOperators<Enum>::value, int> = 0>
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inline constexpr bool any(Enum lhs) noexcept {
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return !none(lhs);
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}
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#endif // TNT_UTILS_BITMASKENUM_H
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