Bence Béky | bac0405 | 2022-04-07 15:44:29 -0400 | [diff] [blame] | 1 | // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef QUICHE_SPDY_CORE_ARRAY_OUTPUT_BUFFER_H_ |
| 6 | #define QUICHE_SPDY_CORE_ARRAY_OUTPUT_BUFFER_H_ |
| 7 | |
| 8 | #include <cstddef> |
| 9 | #include "quiche/spdy/core/zero_copy_output_buffer.h" |
| 10 | |
| 11 | namespace spdy { |
| 12 | |
| 13 | class ArrayOutputBuffer : public ZeroCopyOutputBuffer { |
| 14 | public: |
| 15 | // |buffer| is pointed to the output to write to, and |size| is the capacity |
| 16 | // of the output. |
| 17 | ArrayOutputBuffer(char* buffer, int64_t size) |
| 18 | : current_(buffer), begin_(buffer), capacity_(size) {} |
| 19 | ~ArrayOutputBuffer() override {} |
| 20 | |
| 21 | ArrayOutputBuffer(const ArrayOutputBuffer&) = delete; |
| 22 | ArrayOutputBuffer& operator=(const ArrayOutputBuffer&) = delete; |
| 23 | |
| 24 | void Next(char** data, int* size) override; |
| 25 | void AdvanceWritePtr(int64_t count) override; |
| 26 | uint64_t BytesFree() const override; |
| 27 | |
| 28 | size_t Size() const { return current_ - begin_; } |
| 29 | char* Begin() const { return begin_; } |
| 30 | |
| 31 | // Resets the buffer to its original state. |
| 32 | void Reset() { |
| 33 | capacity_ += Size(); |
| 34 | current_ = begin_; |
| 35 | } |
| 36 | |
| 37 | private: |
| 38 | char* current_ = nullptr; |
| 39 | char* begin_ = nullptr; |
| 40 | uint64_t capacity_ = 0; |
| 41 | }; |
| 42 | |
| 43 | } // namespace spdy |
| 44 | |
| 45 | #endif // QUICHE_SPDY_CORE_ARRAY_OUTPUT_BUFFER_H_ |