9b99e4fc22
Summary: X-link: https://github.com/facebook/react-native/pull/39483 Pull Request resolved: https://github.com/facebook/yoga/pull/1392 Moves internal usages of YGDirection to Direction. bypass-github-export-checks Changelog: [Internal] Reviewed By: rshest Differential Revision: D49335231 fbshipit-source-id: 459fe820c91be88734cebaa8655cd3f0afda83bf
68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <bitset>
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#include <cstdint>
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#include <cstdio>
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#include <type_traits>
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#include <yoga/YGEnums.h>
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#include <yoga/enums/YogaEnums.h>
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namespace facebook::yoga::details {
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constexpr uint8_t log2ceilFn(uint8_t n) {
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return n < 1 ? 0 : (1 + log2ceilFn(n / 2));
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}
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constexpr uint32_t mask(uint8_t bitWidth, uint8_t index) {
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return ((1u << bitWidth) - 1u) << index;
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}
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} // namespace facebook::yoga::details
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namespace facebook::yoga {
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// The number of bits necessary to represent enums defined with YG_ENUM_SEQ_DECL
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template <
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typename Enum,
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std::enable_if_t<(ordinalCount<Enum>() > 0), bool> = true>
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constexpr uint8_t minimumBitCount() {
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return details::log2ceilFn(ordinalCount<Enum>() - 1);
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}
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template <typename Enum>
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constexpr Enum getEnumData(uint32_t flags, uint8_t index) {
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return static_cast<Enum>(
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(flags & details::mask(minimumBitCount<Enum>(), index)) >> index);
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}
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template <typename Enum, typename Value>
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void setEnumData(uint32_t& flags, uint8_t index, Value newValue) {
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flags =
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(flags &
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~static_cast<uint32_t>(details::mask(minimumBitCount<Enum>(), index))) |
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((static_cast<uint32_t>(newValue) << index) &
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(details::mask(minimumBitCount<Enum>(), index)));
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}
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constexpr bool getBooleanData(uint32_t flags, uint8_t index) {
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return (flags >> index) & 1;
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}
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inline void setBooleanData(uint32_t& flags, uint8_t index, bool value) {
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if (value) {
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flags |= 1 << index;
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} else {
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flags &= ~(1 << index);
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}
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}
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} // namespace facebook::yoga
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