Make HPACK static table static and immutable.

net/spdy/hpack_constants.h

 // Copyright 2014 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 NET_SPDY_HPACK_CONSTANTS_H_
 #define NET_SPDY_HPACK_CONSTANTS_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 11 matching lines @@
   size_t bit_size;
 };
 
 // Represents a symbol and its Huffman code (stored in most-significant bits).
 struct HpackHuffmanSymbol {
   uint32 code;
   uint8 length;
   uint16 id;
 };
 
+// An entry in the static table. Must be a POD in order to avoid static
+// initializers, i.e. no user-defined constructors or destructors.
+struct HpackStaticEntry {
+  const char* const name;
+  const size_t name_len;
+  const char* const value;
+  const size_t value_len;
+};
+
 class HpackHuffmanTable;
+class HpackStaticTable;
 
 const uint32 kDefaultHeaderTableSizeSetting = 4096;
 
 // Largest string literal an HpackDecoder/HpackEncoder will attempt to process
 // before returning an error.
 const uint32 kDefaultMaxStringLiteralSize = 16 * 1024;
 
 // Maximum amount of encoded header buffer HpackDecoder will retain before
 // returning an error.
 // TODO(jgraettinger): Remove with SpdyHeadersHandlerInterface switch.
@@ skipping 15 matching lines @@
 // 7.2.2: Opcode for a literal header field without indexing.
 const HpackPrefix kLiteralNoIndexOpcode = { 0x0, 4 };
 
 // 7.2.3: Opcode for a literal header field which is never indexed.
 const HpackPrefix kLiteralNeverIndexOpcode = { 0x1, 4 };
 
 // 7.3: Opcode for maximum header table size update. Begins a varint-encoded
 // table size with a 5-bit prefix.
 const HpackPrefix kHeaderTableSizeUpdateOpcode = { 0x1, 3 };
 
-// Returns symbol code table from "Appendix C. Huffman Codes".
+// Returns symbol code table from "Appendix C. Huffman Code".
 NET_EXPORT_PRIVATE std::vector<HpackHuffmanSymbol> HpackHuffmanCode();
 
+// Returns static table from "Appendix B. Static Table Definition".
+NET_EXPORT_PRIVATE std::vector<HpackStaticEntry> HpackStaticTableVector();
+
 // Returns a HpackHuffmanTable instance initialized with |kHpackHuffmanCode|.
 // The instance is read-only, has static lifetime, and is safe to share amoung
 // threads. This function is thread-safe.
 NET_EXPORT_PRIVATE const HpackHuffmanTable& ObtainHpackHuffmanTable();
 
+// Returns a HpackStaticTable instance initialized with |kHpackStaticTable|.
+// The instance is read-only, has static lifetime, and is safe to share amoung
+// threads. This function is thread-safe.
+NET_EXPORT_PRIVATE const HpackStaticTable& ObtainHpackStaticTable();
+
 // Pseudo-headers start with a colon.  (HTTP2 8.1.2.1., HPACK 3.1.)
 const char kPseudoHeaderPrefix = ':';
 
 }  // namespace net
 
 #endif  // NET_SPDY_HPACK_CONSTANTS_H_