1 // Copyright (c) 2009 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_FLIP_SERVER_SIMPLE_BUFFER_H__ 6 #define NET_TOOLS_FLIP_SERVER_SIMPLE_BUFFER_H__ 7 #pragma once 8 9 #include <string> 10 11 #include "net/tools/flip_server/buffer_interface.h" 12 13 namespace net { 14 15 class SimpleBuffer : public BufferInterface { 16 public: 17 SimpleBuffer(); 18 explicit SimpleBuffer(int size); 19 virtual ~SimpleBuffer() { 20 delete[] storage_; 21 } 22 23 std::string str() const; 24 25 typedef char * iterator; 26 typedef const char * const_iterator; 27 28 iterator begin() { return storage_ + read_idx_; } 29 const_iterator begin() const { return storage_ + read_idx_; } 30 31 iterator end() { return storage_ + write_idx_; } 32 const_iterator end() const { return storage_ + write_idx_; } 33 34 // The following functions all override pure virtual functions 35 // in BufferInterface. See buffer_interface.h for a description 36 // of what they do. 37 virtual int ReadableBytes() const; 38 virtual int BufferSize() const; 39 virtual int BytesFree() const; 40 41 virtual bool Empty() const; 42 virtual bool Full() const; 43 44 virtual int Write(const char* bytes, int size); 45 46 virtual void GetWritablePtr(char **ptr, int* size) const; 47 48 virtual void GetReadablePtr(char **ptr, int* size) const; 49 50 virtual int Read(char* bytes, int size); 51 52 virtual void Clear(); 53 54 // This can be an expensive operation: costing a new/delete, and copying of 55 // all existing data. Even if the existing buffer does not need to be 56 // resized, unread data may still need to be non-destructively copied to 57 // consolidate fragmented free space. 58 virtual bool Reserve(int size); 59 60 virtual void AdvanceReadablePtr(int amount_to_advance); 61 62 virtual void AdvanceWritablePtr(int amount_to_advance); 63 64 void Swap(SimpleBuffer* other) { 65 char* tmp = storage_; 66 storage_ = other->storage_; 67 other->storage_ = tmp; 68 69 int tmp_int = write_idx_; 70 write_idx_ = other->write_idx_; 71 other->write_idx_ = tmp_int; 72 73 tmp_int = read_idx_; 74 read_idx_ = other->read_idx_; 75 other->read_idx_ = tmp_int; 76 77 tmp_int = storage_size_; 78 storage_size_ = other->storage_size_; 79 other->storage_size_ = tmp_int; 80 } 81 82 protected: 83 char* storage_; 84 int write_idx_; 85 int read_idx_; 86 int storage_size_; 87 88 private: 89 //DISALLOW_COPY_AND_ASSIGN(SimpleBuffer); 90 }; 91 92 } // namespace net 93 94 #endif // NET_TOOLS_FLIP_SERVER_SIMPLE_BUFFER_H__ 95 96
