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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_HTTP2_HPACK_CONSTANTS_H_
#define QUICHE_HTTP2_HPACK_HTTP2_HPACK_CONSTANTS_H_
// Enum HpackEntryType identifies the 5 basic types of HPACK Block Entries.
//
// See the spec for details:
// https://http2.github.io/http2-spec/compression.html#rfc.section.6
#include <ostream>
#include "net/third_party/quiche/src/http2/platform/api/http2_export.h"
#include "net/third_party/quiche/src/http2/platform/api/http2_string.h"
namespace http2 {
const size_t kFirstDynamicTableIndex = 62;
enum class HpackEntryType {
// Entry is an index into the static or dynamic table. Decoding it has no
// effect on the dynamic table.
kIndexedHeader,
// The entry contains a literal value. The name may be either a literal or a
// reference to an entry in the static or dynamic table.
// The entry is added to the dynamic table after decoding.
kIndexedLiteralHeader,
// The entry contains a literal value. The name may be either a literal or a
// reference to an entry in the static or dynamic table.
// The entry is not added to the dynamic table after decoding, but a proxy
// may choose to insert the entry into its dynamic table when forwarding
// to another endpoint.
kUnindexedLiteralHeader,
// The entry contains a literal value. The name may be either a literal or a
// reference to an entry in the static or dynamic table.
// The entry is not added to the dynamic table after decoding, and a proxy
// must NOT insert the entry into its dynamic table when forwarding to another
// endpoint.
kNeverIndexedLiteralHeader,
// Entry conveys the size limit of the dynamic table of the encoder to
// the decoder. May be used to flush the table by sending a zero and then
// resetting the size back up to the maximum that the encoder will use
// (within the limits of SETTINGS_HEADER_TABLE_SIZE sent by the
// decoder to the encoder, with the default of 4096 assumed).
kDynamicTableSizeUpdate,
};
// Returns the name of the enum member.
HTTP2_EXPORT_PRIVATE Http2String HpackEntryTypeToString(HpackEntryType v);
// Inserts the name of the enum member into |out|.
HTTP2_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& out,
HpackEntryType v);
} // namespace http2
#endif // QUICHE_HTTP2_HPACK_HTTP2_HPACK_CONSTANTS_H_