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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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