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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.
#ifndef QUICHE_HTTP2_HPACK_DECODER_HPACK_ENTRY_TYPE_DECODER_H_
#define QUICHE_HTTP2_HPACK_DECODER_HPACK_ENTRY_TYPE_DECODER_H_
// Decodes the type of an HPACK entry, and the variable length integer whose
// prefix is in the low-order bits of the same byte, "below" the type bits.
// The integer represents an index into static or dynamic table, which may be
// zero, or is the new size limit of the dynamic table.
#include <cstdint>
#include <string>
#include "http2/decoder/decode_buffer.h"
#include "http2/decoder/decode_status.h"
#include "http2/hpack/http2_hpack_constants.h"
#include "http2/hpack/varint/hpack_varint_decoder.h"
#include "http2/platform/api/http2_logging.h"
#include "common/platform/api/quiche_export.h"
namespace http2 {
class QUICHE_EXPORT_PRIVATE HpackEntryTypeDecoder {
public:
// Only call when the decode buffer has data (i.e. HpackEntryDecoder must
// not call until there is data).
DecodeStatus Start(DecodeBuffer* db);
// Only call Resume if the previous call (Start or Resume) returned
// DecodeStatus::kDecodeInProgress.
DecodeStatus Resume(DecodeBuffer* db) { return varint_decoder_.Resume(db); }
// Returns the decoded entry type. Only call if the preceding call to Start
// or Resume returned kDecodeDone.
HpackEntryType entry_type() const { return entry_type_; }
// Returns the decoded variable length integer. Only call if the
// preceding call to Start or Resume returned kDecodeDone.
uint64_t varint() const { return varint_decoder_.value(); }
std::string DebugString() const;
private:
HpackVarintDecoder varint_decoder_;
// This field is initialized just to keep ASAN happy about reading it
// from DebugString().
HpackEntryType entry_type_ = HpackEntryType::kIndexedHeader;
};
QUICHE_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& out,
const HpackEntryTypeDecoder& v);
} // namespace http2
#endif // QUICHE_HTTP2_HPACK_DECODER_HPACK_ENTRY_TYPE_DECODER_H_
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