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| 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 NET_SPDY_ARRAY_OUTPUT_BUFFER_H_ | |
| 6 #define NET_SPDY_ARRAY_OUTPUT_BUFFER_H_ | |
| 7 | |
| 8 #include <cstddef> | |
| 9 #include "net/spdy/zero_copy_output_buffer.h" | |
| 10 | |
| 11 namespace net { | |
| 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 void Next(char** data, int* size) override; | |
| 22 void AdvanceWritePtr(int64_t count) override; | |
| 23 uint64_t BytesFree() const override; | |
| 24 | |
| 25 size_t Size() const { return current_ - begin_; } | |
| 26 char* Begin() const { return begin_; } | |
| 27 | |
| 28 // Resets the buffer to its original state. | |
| 29 void Reset() { | |
| 30 capacity_ += Size(); | |
| 31 current_ = begin_; | |
| 32 } | |
| 33 | |
| 34 ArrayOutputBuffer(const ArrayOutputBuffer&) = delete; | |
| 35 ArrayOutputBuffer& operator=(const ArrayOutputBuffer&) = delete; | |
| 36 | |
| 37 private: | |
| 38 char* current_ = nullptr; | |
| 39 char* begin_ = nullptr; | |
| 40 int64_t capacity_ = 0; | |
| 41 }; | |
| 42 | |
| 43 } // namespace net | |
| 44 | |
| 45 #endif // NET_SPDY_ARRAY_OUTPUT_BUFFER_H_ | |
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