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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #include "net/spdy/hpack_output_stream.h" | 5 #include "net/spdy/hpack_output_stream.h" |
| 6 | 6 |
| 7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 | 8 |
| 9 | |
| 10 namespace net { | 9 namespace net { |
| 11 | 10 |
| 12 using base::StringPiece; | 11 using base::StringPiece; |
| 13 using std::string; | 12 using std::string; |
| 14 | 13 |
| 15 HpackOutputStream::HpackOutputStream() | 14 HpackOutputStream::HpackOutputStream() : bit_offset_(0) { |
| 16 : bit_offset_(0) {} | 15 } |
| 17 | 16 |
| 18 HpackOutputStream::~HpackOutputStream() {} | 17 HpackOutputStream::~HpackOutputStream() { |
| 18 } |
| 19 | 19 |
| 20 void HpackOutputStream::AppendBits(uint8 bits, size_t bit_size) { | 20 void HpackOutputStream::AppendBits(uint8 bits, size_t bit_size) { |
| 21 DCHECK_GT(bit_size, 0u); | 21 DCHECK_GT(bit_size, 0u); |
| 22 DCHECK_LE(bit_size, 8u); | 22 DCHECK_LE(bit_size, 8u); |
| 23 DCHECK_EQ(bits >> bit_size, 0); | 23 DCHECK_EQ(bits >> bit_size, 0); |
| 24 size_t new_bit_offset = bit_offset_ + bit_size; | 24 size_t new_bit_offset = bit_offset_ + bit_size; |
| 25 if (bit_offset_ == 0) { | 25 if (bit_offset_ == 0) { |
| 26 // Buffer ends on a byte boundary. | 26 // Buffer ends on a byte boundary. |
| 27 DCHECK_LE(bit_size, 8u); | 27 DCHECK_LE(bit_size, 8u); |
| 28 buffer_.append(1, bits << (8 - bit_size)); | 28 buffer_.append(1, bits << (8 - bit_size)); |
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| 68 void HpackOutputStream::TakeString(string* output) { | 68 void HpackOutputStream::TakeString(string* output) { |
| 69 // This must hold, since all public functions cause the buffer to | 69 // This must hold, since all public functions cause the buffer to |
| 70 // end on a byte boundary. | 70 // end on a byte boundary. |
| 71 DCHECK_EQ(bit_offset_, 0u); | 71 DCHECK_EQ(bit_offset_, 0u); |
| 72 buffer_.swap(*output); | 72 buffer_.swap(*output); |
| 73 buffer_.clear(); | 73 buffer_.clear(); |
| 74 bit_offset_ = 0; | 74 bit_offset_ = 0; |
| 75 } | 75 } |
| 76 | 76 |
| 77 } // namespace net | 77 } // namespace net |
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