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Side by Side Diff: net/tools/balsa/simple_buffer.h

Issue 992733002: Remove //net (except for Android test stuff) and sdch (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 9 months ago
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1 // Copyright 2013 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_TOOLS_BALSA_SIMPLE_BUFFER_H__
6 #define NET_TOOLS_BALSA_SIMPLE_BUFFER_H__
7
8 #include <string>
9
10 #include "base/compiler_specific.h"
11 #include "net/tools/balsa/buffer_interface.h"
12
13 namespace net {
14
15 class SimpleBuffer : public BufferInterface {
16 public:
17 SimpleBuffer();
18 explicit SimpleBuffer(int size);
19 ~SimpleBuffer() override;
20
21 std::string str() const;
22
23 typedef char * iterator;
24 typedef const char * const_iterator;
25
26 iterator begin() { return storage_ + read_idx_; }
27 const_iterator begin() const { return storage_ + read_idx_; }
28
29 iterator end() { return storage_ + write_idx_; }
30 const_iterator end() const { return storage_ + write_idx_; }
31
32 // The following functions all override pure virtual functions
33 // in BufferInterface. See buffer_interface.h for a description
34 // of what they do.
35 int ReadableBytes() const override;
36 int BufferSize() const override;
37 int BytesFree() const override;
38
39 bool Empty() const override;
40 bool Full() const override;
41
42 int Write(const char* bytes, int size) override;
43
44 void GetWritablePtr(char** ptr, int* size) const override;
45
46 void GetReadablePtr(char** ptr, int* size) const override;
47
48 int Read(char* bytes, int size) override;
49
50 void Clear() override;
51
52 // This can be an expensive operation: costing a new/delete, and copying of
53 // all existing data. Even if the existing buffer does not need to be
54 // resized, unread data may still need to be non-destructively copied to
55 // consolidate fragmented free space.
56 bool Reserve(int size) override;
57
58 void AdvanceReadablePtr(int amount_to_advance) override;
59
60 void AdvanceWritablePtr(int amount_to_advance) override;
61
62 void Swap(SimpleBuffer* other) {
63 char* tmp = storage_;
64 storage_ = other->storage_;
65 other->storage_ = tmp;
66
67 int tmp_int = write_idx_;
68 write_idx_ = other->write_idx_;
69 other->write_idx_ = tmp_int;
70
71 tmp_int = read_idx_;
72 read_idx_ = other->read_idx_;
73 other->read_idx_ = tmp_int;
74
75 tmp_int = storage_size_;
76 storage_size_ = other->storage_size_;
77 other->storage_size_ = tmp_int;
78 }
79
80 protected:
81 char* storage_;
82 int write_idx_;
83 int read_idx_;
84 int storage_size_;
85
86 private:
87 //DISALLOW_COPY_AND_ASSIGN(SimpleBuffer);
88 };
89
90 } // namespace net
91
92 #endif // NET_TOOLS_BALSA_SIMPLE_BUFFER_H__
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