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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef NET_QUIC_QUIC_DATA_WRITER_H_ | 5 #ifndef NET_QUIC_QUIC_DATA_WRITER_H_ |
6 #define NET_QUIC_QUIC_DATA_WRITER_H_ | 6 #define NET_QUIC_QUIC_DATA_WRITER_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
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54 // Fills the remaining buffer with null characters. | 54 // Fills the remaining buffer with null characters. |
55 void WritePadding(); | 55 void WritePadding(); |
56 | 56 |
57 // Methods for editing the payload at a specific offset, where the | 57 // Methods for editing the payload at a specific offset, where the |
58 // offset must be within the writer's capacity. | 58 // offset must be within the writer's capacity. |
59 // Return true if there is enough space at that offset, false otherwise. | 59 // Return true if there is enough space at that offset, false otherwise. |
60 bool WriteUInt8ToOffset(uint8 value, size_t offset); | 60 bool WriteUInt8ToOffset(uint8 value, size_t offset); |
61 bool WriteUInt32ToOffset(uint32 value, size_t offset); | 61 bool WriteUInt32ToOffset(uint32 value, size_t offset); |
62 bool WriteUInt48ToOffset(uint64 value, size_t offset); | 62 bool WriteUInt48ToOffset(uint64 value, size_t offset); |
63 | 63 |
64 size_t capacity() const { | 64 size_t capacity() const { return capacity_; } |
65 return capacity_; | |
66 } | |
67 | 65 |
68 private: | 66 private: |
69 // Returns the location that the data should be written at, or NULL if there | 67 // Returns the location that the data should be written at, or NULL if there |
70 // is not enough room. Call EndWrite with the returned offset and the given | 68 // is not enough room. Call EndWrite with the returned offset and the given |
71 // length to pad out for the next write. | 69 // length to pad out for the next write. |
72 char* BeginWrite(size_t length); | 70 char* BeginWrite(size_t length); |
73 | 71 |
74 char* buffer_; | 72 char* buffer_; |
75 size_t capacity_; // Allocation size of payload (or -1 if buffer is const). | 73 size_t capacity_; // Allocation size of payload (or -1 if buffer is const). |
76 size_t length_; // Current length of the buffer. | 74 size_t length_; // Current length of the buffer. |
77 | 75 |
78 DISALLOW_COPY_AND_ASSIGN(QuicDataWriter); | 76 DISALLOW_COPY_AND_ASSIGN(QuicDataWriter); |
79 }; | 77 }; |
80 | 78 |
81 } // namespace net | 79 } // namespace net |
82 | 80 |
83 #endif // NET_QUIC_QUIC_DATA_WRITER_H_ | 81 #endif // NET_QUIC_QUIC_DATA_WRITER_H_ |
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