| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef LIB_FIDL_CPP_WIRE_ARRAY_H_ |
| #define LIB_FIDL_CPP_WIRE_ARRAY_H_ |
| |
| #include <zircon/fidl.h> |
| |
| #include <algorithm> |
| |
| namespace fidl { |
| |
| // Implementation of std::array guaranteed to have the same memory layout as a C array, |
| // hence the same layout as the FIDL wire-format. |
| // The standard does not guarantee that there are no trailing padding bytes in std::array. |
| // When adding new functionalities to this struct, the data layout should not be changed. |
| template <typename T, size_t N> |
| struct Array final { |
| using value_type = T; |
| |
| static constexpr size_t size() { return N; } |
| |
| const T* data() const { return data_; } |
| T* data() { return data_; } |
| |
| const T& at(size_t offset) const { return data()[offset]; } |
| T& at(size_t offset) { return data()[offset]; } |
| |
| const T& operator[](size_t offset) const { return at(offset); } |
| T& operator[](size_t offset) { return at(offset); } |
| |
| T* begin() { return data(); } |
| const T* begin() const { return data(); } |
| const T* cbegin() const { return data(); } |
| |
| T* end() { return data() + size(); } |
| const T* end() const { return data() + size(); } |
| const T* cend() const { return data() + size(); } |
| |
| // Keeping data_ public such that an aggregate initializer can be used. |
| T data_[N]; |
| |
| static_assert(N > 0, "fidl::Array cannot have zero elements."); |
| }; |
| |
| template <typename T, size_t N> |
| bool operator==(const fidl::Array<T, N>& lhs, const fidl::Array<T, N>& rhs) { |
| return std::equal(lhs.begin(), lhs.end(), rhs.begin(), rhs.end()); |
| } |
| |
| template <typename T, size_t N> |
| bool operator!=(const fidl::Array<T, N>& lhs, const fidl::Array<T, N>& rhs) { |
| return !(lhs == rhs); |
| } |
| |
| } // namespace fidl |
| |
| #endif // LIB_FIDL_CPP_WIRE_ARRAY_H_ |