// Copyright 2021 The Chromium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef COMPONENTS_SERVICES_APP_SERVICE_PUBLIC_CPP_MACROS_H_ #define COMPONENTS_SERVICES_APP_SERVICE_PUBLIC_CPP_MACROS_H_ #include #include "base/macros/concat.h" namespace apps { #define SET_OPTIONAL_VALUE(VALUE) \ if (delta->VALUE.has_value()) { \ state->VALUE = delta->VALUE; \ } #define SET_ENUM_VALUE(VALUE, DEFAULT_VALUE) \ if (delta->VALUE != DEFAULT_VALUE) { \ state->VALUE = delta->VALUE; \ } #define GET_VALUE(VALUE) \ if (delta_ && delta_->VALUE()) { \ return delta_->VALUE(); \ } \ if (state_ && state_->VALUE()) { \ return state_->VALUE(); \ } \ return nullptr; #define IS_VALUE_CHANGED(VALUE) \ return delta_ && delta_->VALUE() && \ (!state_ || (delta_->VALUE() != state_->VALUE())); #define GET_VALUE_WITH_FALLBACK(VALUE, FALLBACK_VALUE) \ if (delta_ && delta_->VALUE.has_value()) { \ return delta_->VALUE.value(); \ } \ if (state_ && state_->VALUE.has_value()) { \ return state_->VALUE.value(); \ } \ return FALLBACK_VALUE; #define GET_VALUE_WITH_DEFAULT_VALUE(VALUE, DEFAULT_VALUE) \ if (delta_ && delta_->VALUE != (DEFAULT_VALUE)) { \ return delta_->VALUE; \ } \ if (state_) { \ return state_->VALUE; \ } \ return DEFAULT_VALUE; #define IS_VALUE_CHANGED_WITH_DEFAULT_VALUE(VALUE, DEFAULT_VALUE) \ return delta_ && (delta_->VALUE != DEFAULT_VALUE) && \ (!state_ || (delta_->VALUE != state_->VALUE)); #define GET_VALUE_WITH_CHECK_AND_DEFAULT_RETURN(VALUE, CHECK, DEFAULT_RETURN) \ if (delta_ && !delta_->VALUE.CHECK()) { \ return delta_->VALUE; \ } \ if (state_ && !state_->VALUE.CHECK()) { \ return state_->VALUE; \ } \ return DEFAULT_RETURN; #define IS_VALUE_CHANGED_WITH_CHECK(VALUE, CHECK) \ return delta_ && !delta_->VALUE.CHECK() && \ (!state_ || (delta_->VALUE != state_->VALUE)); #define RETURN_OPTIONAL_VALUE_CHANGED(VALUE) \ return delta_ && delta_->VALUE.has_value() && \ (!state_ || (delta_->VALUE != state_->VALUE)); #define PRINT_OPTIONAL_BOOL(VALUE) \ (VALUE.has_value() ? (VALUE.value() ? "true" : "false") : "null") #define IS_VECTOR_VALUE_EQUAL(VALUE) \ if (this->VALUE.size() != other.VALUE.size()) { \ return false; \ } \ for (size_t i = 0; i < other.VALUE.size(); i++) { \ if (this->VALUE[i] != other.VALUE[i]) { \ return false; \ } \ } // Macros for enum #define ARC_COUNT_(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, \ _14, _15, _16, N, ...) \ N #define ARG_COUNT(...) \ ARC_COUNT_(0, ##__VA_ARGS__, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, \ 3, 2, 1, 0) // Go through all items in enum to generate code for each element. #define DOARG1(FUNC, CLASSNAME, ELEM) FUNC(CLASSNAME, ELEM) #define DOARG2(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG1(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG3(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG2(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG4(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG3(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG5(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG4(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG6(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG5(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG7(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG6(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG8(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG7(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG9(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG8(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG10(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG9(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG11(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG10(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG12(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG11(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG13(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG12(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG14(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG13(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG15(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG14(FUNC, CLASSNAME, __VA_ARGS__) #define DOARG16(FUNC, CLASSNAME, ELEM1, ...) \ DOARG1(FUNC, CLASSNAME, ELEM1) DOARG15(FUNC, CLASSNAME, __VA_ARGS__) #define FOREACH_(FUNC, CLASSNAME, ...) \ BASE_CONCAT(DOARG, ARG_COUNT(__VA_ARGS__))(FUNC, CLASSNAME, __VA_ARGS__) #define GET_ELEM(N, ...) BASE_CONCAT(GET_ELEM, N)(__VA_ARGS__) #define GET_ELEM1(_1, ...) _1 #define GET_ELEM2(_1, _2, ...) _2 #define GET_ELEM3(_1, _2, _3, ...) _3 #define GET_ELEM4(_1, _2, _3, _4, ...) _4 #define GET_ELEM5(_1, _2, _3, _4, _5, ...) _5 #define GET_ELEM6(_1, _2, _3, _4, _5, _6, ...) _6 #define GET_ELEM7(_1, _2, _3, _4, _5, _6, _7, ...) _7 #define GET_ELEM8(_1, _2, _3, _4, _5, _6, _7, _8, ...) _8 #define GET_ELEM9(_1, _2, _3, _4, _5, _6, _7, _8, _9, ...) _9 #define GET_ELEM10(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, ...) _10 #define GET_ELEM11(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, ...) _11 #define GET_ELEM12(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, ...) _12 #define GET_ELEM13(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, \ ...) \ _13 #define GET_ELEM14(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, \ _14, ...) \ _14 #define GET_ELEM15(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, \ _14, _15, ...) \ _15 #define GET_ELEM16(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, \ _14, _15, _16, ...) \ _16 // Get last argument. #define GET_LAST(...) GET_ELEM(ARG_COUNT(__VA_ARGS__), __VA_ARGS__), // Macros for enum definitions #define ELEM(CLASSNAME, E) E, // Macro to generate enum `CLASSNAME` for elements, and the definition for the // `EnumToString`, e.g.: // enum class ClassName { // kUnknown, // kElement1, // kElement2, // kElement3, // kMaxValue = kElement3, // }; // COMPONENT_EXPORT(APP_TYPES) // std::string EnumToString(ClassName input); // // Modify ARC_COUNT, GET_ELEMXX and DOARGXX to support more elements. #define ENUM(CLASSNAME, ...) \ enum class CLASSNAME { \ FOREACH_(ELEM, CLASSNAME, __VA_ARGS__) kMaxValue = GET_LAST(__VA_ARGS__) \ }; \ COMPONENT_EXPORT(APP_TYPES) \ std::string EnumToString(CLASSNAME input); #define ENUM_FOR_COMPONENT(COMPONENT, CLASSNAME, ...) \ enum class CLASSNAME { FOREACH_(ELEM, CLASSNAME, __VA_ARGS__) }; \ COMPONENT_EXPORT(COMPONENT) \ std::string EnumToString(CLASSNAME input); // Macros to print enum #define PRINT_CLASSNAME_AND_ELEM(CLASSNAME, ELEM) \ std::string(#CLASSNAME) + std::string("::") + std::string(#ELEM) #define PRINT_ELEM(CLASSNAME, ELEM) \ case CLASSNAME::ELEM: \ return PRINT_CLASSNAME_AND_ELEM(CLASSNAME, ELEM); // Macro to generate the function `EnumToString` to print the enum `CLASSNAME` // elements, e.g.: // std::string EnumToString(ClassName input) { // switch (input) { // case ClassName::kElement1: // return "ClassName::kElement1"; // case ClassName::kElement2: // return "ClassName::kElement2"; // case ClassName::kElement3: // return "ClassName::kElement1"; // } // } // // Modify ARC_COUNT, GET_ELEMXX and DOARGXX to support more elements. #define APP_ENUM_TO_STRING(CLASSNAME, ...) \ std::string EnumToString(CLASSNAME input) { \ switch (input) { FOREACH_(PRINT_ELEM, CLASSNAME, __VA_ARGS__) } \ } } // namespace apps #endif // COMPONENTS_SERVICES_APP_SERVICE_PUBLIC_CPP_MACROS_H_