Project import generated by Copybara.
PiperOrigin-RevId: 224614037
Change-Id: I14e53449d4aeccb328f86828c76b5f09dea0d4b8
diff --git a/http2/hpack/http2_hpack_constants.h b/http2/hpack/http2_hpack_constants.h
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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_
