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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "http2/hpack/decoder/hpack_block_decoder.h"
#include <cstdint>
#include "absl/strings/str_cat.h"
#include "http2/platform/api/http2_flag_utils.h"
#include "http2/platform/api/http2_flags.h"
#include "http2/platform/api/http2_logging.h"
#include "http2/platform/api/http2_string_utils.h"
namespace http2 {
DecodeStatus HpackBlockDecoder::Decode(DecodeBuffer* db) {
if (!before_entry_) {
HTTP2_DVLOG(2) << "HpackBlockDecoder::Decode resume entry, db->Remaining="
<< db->Remaining();
DecodeStatus status = entry_decoder_.Resume(db, listener_);
switch (status) {
case DecodeStatus::kDecodeDone:
before_entry_ = true;
break;
case DecodeStatus::kDecodeInProgress:
QUICHE_DCHECK_EQ(0u, db->Remaining());
return DecodeStatus::kDecodeInProgress;
case DecodeStatus::kDecodeError:
HTTP2_CODE_COUNT_N(decompress_failure_3, 1, 23);
return DecodeStatus::kDecodeError;
}
}
QUICHE_DCHECK(before_entry_);
while (db->HasData()) {
HTTP2_DVLOG(2) << "HpackBlockDecoder::Decode start entry, db->Remaining="
<< db->Remaining();
DecodeStatus status = entry_decoder_.Start(db, listener_);
switch (status) {
case DecodeStatus::kDecodeDone:
continue;
case DecodeStatus::kDecodeInProgress:
QUICHE_DCHECK_EQ(0u, db->Remaining());
before_entry_ = false;
return DecodeStatus::kDecodeInProgress;
case DecodeStatus::kDecodeError:
HTTP2_CODE_COUNT_N(decompress_failure_3, 2, 23);
return DecodeStatus::kDecodeError;
}
QUICHE_DCHECK(false);
}
QUICHE_DCHECK(before_entry_);
return DecodeStatus::kDecodeDone;
}
std::string HpackBlockDecoder::DebugString() const {
return absl::StrCat(
"HpackBlockDecoder(", entry_decoder_.DebugString(), ", listener@",
Http2Hex(reinterpret_cast<intptr_t>(listener_)),
(before_entry_ ? ", between entries)" : ", in an entry)"));
}
std::ostream& operator<<(std::ostream& out, const HpackBlockDecoder& v) {
return out << v.DebugString();
}
} // namespace http2
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