660edcec20
Summary: X-link: https://github.com/facebook/react-native/pull/38304 Pull Request resolved: https://github.com/facebook/yoga/pull/1326 For better readability Reviewed By: christophpurrer Differential Revision: D47384926 fbshipit-source-id: 2f60d50a185331b3624d45d1fc45f98d504b3034
133 lines
4.6 KiB
C++
133 lines
4.6 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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#ifdef __cplusplus
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#include <type_traits>
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#endif
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#ifdef __cplusplus
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#define YG_EXTERN_C_BEGIN extern "C" {
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#define YG_EXTERN_C_END }
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#else
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#define YG_EXTERN_C_BEGIN
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#define YG_EXTERN_C_END
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#endif
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#if defined(__cplusplus)
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#define YG_DEPRECATED(message) [[deprecated(message)]]
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#elif defined(_MSC_VER)
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#define YG_DEPRECATED(message) __declspec(deprecated(message))
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#else
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#define YG_DEPRECATED(message) __attribute__((deprecated(message)))
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#endif
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#ifdef _WINDLL
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#define WIN_EXPORT __declspec(dllexport)
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#else
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#define WIN_EXPORT
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#endif
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#ifndef YOGA_EXPORT
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#ifdef _MSC_VER
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#define YOGA_EXPORT
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#else
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#define YOGA_EXPORT __attribute__((visibility("default")))
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#endif
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#endif
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#ifdef NS_ENUM
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// Cannot use NSInteger as NSInteger has a different size than int (which is the
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// default type of a enum). Therefor when linking the Yoga C library into obj-c
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// the header is a mismatch for the Yoga ABI.
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#define YG_ENUM_BEGIN(name) NS_ENUM(int, name)
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#define YG_ENUM_END(name)
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#else
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#define YG_ENUM_BEGIN(name) enum name
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#define YG_ENUM_END(name) name
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#endif
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#ifdef __cplusplus
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#define YG_DEFINE_ENUM_FLAG_OPERATORS(name) \
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extern "C++" { \
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constexpr inline name operator~(name a) { \
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return static_cast<name>( \
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~static_cast<std::underlying_type<name>::type>(a)); \
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} \
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constexpr inline name operator|(name a, name b) { \
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return static_cast<name>( \
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static_cast<std::underlying_type<name>::type>(a) | \
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static_cast<std::underlying_type<name>::type>(b)); \
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} \
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constexpr inline name operator&(name a, name b) { \
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return static_cast<name>( \
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static_cast<std::underlying_type<name>::type>(a) & \
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static_cast<std::underlying_type<name>::type>(b)); \
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} \
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constexpr inline name operator^(name a, name b) { \
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return static_cast<name>( \
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static_cast<std::underlying_type<name>::type>(a) ^ \
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static_cast<std::underlying_type<name>::type>(b)); \
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} \
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inline name& operator|=(name& a, name b) { \
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return reinterpret_cast<name&>( \
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reinterpret_cast<std::underlying_type<name>::type&>(a) |= \
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static_cast<std::underlying_type<name>::type>(b)); \
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} \
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inline name& operator&=(name& a, name b) { \
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return reinterpret_cast<name&>( \
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reinterpret_cast<std::underlying_type<name>::type&>(a) &= \
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static_cast<std::underlying_type<name>::type>(b)); \
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} \
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inline name& operator^=(name& a, name b) { \
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return reinterpret_cast<name&>( \
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reinterpret_cast<std::underlying_type<name>::type&>(a) ^= \
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static_cast<std::underlying_type<name>::type>(b)); \
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} \
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}
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#else
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#define YG_DEFINE_ENUM_FLAG_OPERATORS(name)
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#endif
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#ifdef __cplusplus
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namespace facebook::yoga::enums {
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template <typename T>
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constexpr int count(); // can't use `= delete` due to a defect in clang < 3.9
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namespace detail {
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template <int... xs>
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constexpr int n() {
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return sizeof...(xs);
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}
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} // namespace detail
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} // namespace facebook::yoga::enums
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#endif
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#define YG_ENUM_DECL(NAME, ...) \
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typedef YG_ENUM_BEGIN(NAME){__VA_ARGS__} YG_ENUM_END(NAME); \
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WIN_EXPORT const char* NAME##ToString(NAME);
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#ifdef __cplusplus
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#define YG_ENUM_SEQ_DECL(NAME, ...) \
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YG_ENUM_DECL(NAME, __VA_ARGS__) \
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YG_EXTERN_C_END \
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\
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namespace facebook::yoga::enums { \
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template <> \
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constexpr int count<NAME>() { \
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return detail::n<__VA_ARGS__>(); \
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} \
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} \
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YG_EXTERN_C_BEGIN
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#else
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#define YG_ENUM_SEQ_DECL YG_ENUM_DECL
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#endif
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