| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkSpan_DEFINED |
| #define SkSpan_DEFINED |
| |
| #include <cstddef> |
| #include <vector> |
| |
| template <typename T> |
| class SkSpan { |
| public: |
| template <size_t N> |
| constexpr SkSpan(T(&t)[N]) : fPtr(t), fSize(N) {} |
| constexpr SkSpan() : fPtr{nullptr}, fSize{0} {} |
| constexpr SkSpan(T* ptr, size_t size) : fPtr{ptr}, fSize{size} {} |
| template <typename U> |
| constexpr explicit SkSpan(std::vector<U>& v) : fPtr{v.data()}, fSize{v.size()} {} |
| constexpr SkSpan(const SkSpan& o) = default; |
| constexpr SkSpan& operator=(const SkSpan& that) { |
| fPtr = that.fPtr; |
| fSize = that.fSize; |
| return *this; |
| } |
| constexpr T& operator [] (size_t i) const { return fPtr[i]; } |
| constexpr T* begin() const { return fPtr; } |
| constexpr T* end() const { return fPtr + fSize; } |
| constexpr const T* cbegin() const { return fPtr; } |
| constexpr const T* cend() const { return fPtr + fSize; } |
| constexpr T* data() const { return fPtr; } |
| constexpr size_t size() const { return fSize; } |
| constexpr bool empty() const { return fSize == 0; } |
| constexpr size_t size_bytes() const { return fSize * sizeof(T); } |
| constexpr SkSpan<const T> toConst() const { return SkSpan<const T>{fPtr, fSize}; } |
| |
| private: |
| T* fPtr; |
| size_t fSize; |
| }; |
| |
| #endif // SkSpan_DEFINED |