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| 1 // Copyright 2016 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 #include "net/http2/hpack/decoder/hpack_block_decoder.h" |
| 6 |
| 7 #include <stdint.h> |
| 8 |
| 9 #include <sstream> |
| 10 #include <string> |
| 11 |
| 12 #include "base/logging.h" |
| 13 |
| 14 namespace net { |
| 15 |
| 16 DecodeStatus HpackBlockDecoder::Decode(DecodeBuffer* db) { |
| 17 if (!before_entry_) { |
| 18 DVLOG(2) << "HpackBlockDecoder::Decode resume entry, db->Remaining=" |
| 19 << db->Remaining(); |
| 20 DecodeStatus status = entry_decoder_.Resume(db, listener_); |
| 21 switch (status) { |
| 22 case DecodeStatus::kDecodeDone: |
| 23 before_entry_ = true; |
| 24 break; |
| 25 case DecodeStatus::kDecodeInProgress: |
| 26 DCHECK_EQ(0u, db->Remaining()); |
| 27 return DecodeStatus::kDecodeInProgress; |
| 28 case DecodeStatus::kDecodeError: |
| 29 return DecodeStatus::kDecodeError; |
| 30 } |
| 31 } |
| 32 DCHECK(before_entry_); |
| 33 while (db->HasData()) { |
| 34 DVLOG(2) << "HpackBlockDecoder::Decode start entry, db->Remaining=" |
| 35 << db->Remaining(); |
| 36 DecodeStatus status = entry_decoder_.Start(db, listener_); |
| 37 switch (status) { |
| 38 case DecodeStatus::kDecodeDone: |
| 39 continue; |
| 40 case DecodeStatus::kDecodeInProgress: |
| 41 DCHECK_EQ(0u, db->Remaining()); |
| 42 before_entry_ = false; |
| 43 return DecodeStatus::kDecodeInProgress; |
| 44 case DecodeStatus::kDecodeError: |
| 45 return DecodeStatus::kDecodeError; |
| 46 } |
| 47 DCHECK(false); |
| 48 } |
| 49 DCHECK(before_entry_); |
| 50 return DecodeStatus::kDecodeDone; |
| 51 } |
| 52 |
| 53 std::string HpackBlockDecoder::DebugString() const { |
| 54 std::stringstream ss; |
| 55 ss << "HpackBlockDecoder(" << entry_decoder_.DebugString() << ", listener@" |
| 56 << std::hex << reinterpret_cast<intptr_t>(listener_) |
| 57 << (before_entry_ ? ", between entries)" : ", in an entry)"); |
| 58 return ss.str(); |
| 59 } |
| 60 |
| 61 std::ostream& operator<<(std::ostream& out, const HpackBlockDecoder& v) { |
| 62 return out << v.DebugString(); |
| 63 } |
| 64 |
| 65 } // namespace net |
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