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Side by Side Diff: net/spdy/spdy_frame_builder.h

Issue 11782024: Remove unused methods from SpdyFrameBuilder. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 11 months ago
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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_SPDY_SPDY_FRAME_BUILDER_H_ 5 #ifndef NET_SPDY_SPDY_FRAME_BUILDER_H_
6 #define NET_SPDY_SPDY_FRAME_BUILDER_H_ 6 #define NET_SPDY_SPDY_FRAME_BUILDER_H_
7 7
8 #include <string> 8 #include <string>
9 9
10 #include "base/basictypes.h" 10 #include "base/basictypes.h"
11 #include "base/string_piece.h" 11 #include "base/string_piece.h"
12 #include "base/sys_byteorder.h" 12 #include "base/sys_byteorder.h"
13 #include "net/base/net_export.h" 13 #include "net/base/net_export.h"
14 #include "net/spdy/spdy_protocol.h" 14 #include "net/spdy/spdy_protocol.h"
15 15
16 namespace net { 16 namespace net {
17 17
18 // This class provides facilities for basic binary value packing and unpacking 18 // This class provides facilities for basic binary value packing and unpacking
Ryan Sleevi 2013/01/07 23:46:49 Does this comment need to be updated, now that it
Ryan Hamilton 2013/01/08 00:48:32 Done.
19 // into Spdy frames. 19 // into Spdy frames.
20 // 20 //
21 // The SpdyFrameBuilder supports appending primitive values (int, string, etc) 21 // The SpdyFrameBuilder supports appending primitive values (int, string, etc)
22 // to a frame instance. The SpdyFrameBuilder grows its internal memory buffer 22 // to a frame instance. The SpdyFrameBuilder grows its internal memory buffer
23 // dynamically to hold the sequence of primitive values. The internal memory 23 // dynamically to hold the sequence of primitive values. The internal memory
24 // buffer is exposed as the "data" of the SpdyFrameBuilder. 24 // buffer is exposed as the "data" of the SpdyFrameBuilder.
25 class NET_EXPORT_PRIVATE SpdyFrameBuilder { 25 class NET_EXPORT_PRIVATE SpdyFrameBuilder {
26 public: 26 public:
27 ~SpdyFrameBuilder(); 27 ~SpdyFrameBuilder();
28 28
(...skipping 50 matching lines...) Expand 10 before | Expand all | Expand 10 after
79 79
80 // Write to a particular offset in the data buffer. 80 // Write to a particular offset in the data buffer.
81 bool WriteBytesToOffset(int offset, const void* data, uint32 data_len) { 81 bool WriteBytesToOffset(int offset, const void* data, uint32 data_len) {
82 if (offset + data_len > length_) 82 if (offset + data_len > length_)
83 return false; 83 return false;
84 char *ptr = buffer_ + offset; 84 char *ptr = buffer_ + offset;
85 memcpy(ptr, data, data_len); 85 memcpy(ptr, data, data_len);
86 return true; 86 return true;
87 } 87 }
88 88
89 // Returns true if the given iterator could point to data with the given
90 // length. If there is no room for the given data before the end of the
91 // payload, returns false.
92 bool IteratorHasRoomFor(const void* iter, int len) const {
93 const char* end_of_region = reinterpret_cast<const char*>(iter) + len;
94 if (len < 0 ||
95 iter < buffer_ ||
96 iter > end_of_payload() ||
97 iter > end_of_region ||
98 end_of_region > end_of_payload())
99 return false;
100
101 // Watch out for overflow in pointer calculation, which wraps.
102 return (iter <= end_of_region) && (end_of_region <= end_of_payload());
103 }
104
105 protected: 89 protected:
106 size_t capacity() const {
107 return capacity_;
108 }
109
110 const char* end_of_payload() const { return buffer_ + length_; } 90 const char* end_of_payload() const { return buffer_ + length_; }
111 91
112 // Completes the write operation by padding the data with NULL bytes until it 92 // Completes the write operation by padding the data with NULL bytes until it
113 // is padded. Should be paired with BeginWrite, but it does not necessarily 93 // is padded. Should be paired with BeginWrite, but it does not necessarily
114 // have to be called after the data is written. 94 // have to be called after the data is written.
115 void EndWrite(char* dest, int length); 95 void EndWrite(char* dest, int length);
116 96
117 // Moves the iterator by the given number of bytes.
118 static void UpdateIter(void** iter, int bytes) {
119 *iter = static_cast<char*>(*iter) + bytes;
120 }
121
122 private: 97 private:
123 // Returns the location that the data should be written at, or NULL if there 98 // Returns the location that the data should be written at, or NULL if there
124 // is not enough room. Call EndWrite with the returned offset and the given 99 // is not enough room. Call EndWrite with the returned offset and the given
125 // length to pad out for the next write. 100 // length to pad out for the next write.
126 char* BeginWrite(size_t length); 101 char* BeginWrite(size_t length);
127 102
128 char* buffer_; 103 char* buffer_;
Ryan Sleevi 2013/01/07 23:46:49 Could also do scoped_ptr<char[]> (unique_ptr<> in
Ryan Hamilton 2013/01/08 00:48:32 Done.
129 size_t capacity_; // Allocation size of payload (or -1 if buffer is const). 104 size_t capacity_; // Allocation size of payload (or -1 if buffer is const).
130 size_t length_; // current length of the buffer 105 size_t length_; // current length of the buffer
131 }; 106 };
132 107
133 } // namespace net 108 } // namespace net
134 109
135 #endif // NET_SPDY_SPDY_FRAME_BUILDER_H_ 110 #endif // NET_SPDY_SPDY_FRAME_BUILDER_H_
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