Index: net/spdy/hpack_huffman_table.h |
diff --git a/net/spdy/hpack_huffman_table.h b/net/spdy/hpack_huffman_table.h |
deleted file mode 100644 |
index 55352d4e639c14b8d7054c3603a3c5ddaf987c15..0000000000000000000000000000000000000000 |
--- a/net/spdy/hpack_huffman_table.h |
+++ /dev/null |
@@ -1,127 +0,0 @@ |
-// 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_HUFFMAN_TABLE_H_ |
-#define NET_SPDY_HPACK_HUFFMAN_TABLE_H_ |
- |
-#include <cstddef> |
-#include <string> |
-#include <vector> |
- |
-#include "base/basictypes.h" |
-#include "base/strings/string_piece.h" |
-#include "net/base/net_export.h" |
-#include "net/spdy/hpack_constants.h" |
- |
-namespace net { |
- |
-namespace test { |
-class HpackHuffmanTablePeer; |
-} // namespace test |
- |
-class HpackInputStream; |
-class HpackOutputStream; |
- |
-// HpackHuffmanTable encodes and decodes string literals using a constructed |
-// canonical Huffman code. Once initialized, an instance is read only and |
-// may be accessed only through its const interface. |
-class NET_EXPORT_PRIVATE HpackHuffmanTable { |
- public: |
- friend class test::HpackHuffmanTablePeer; |
- |
- typedef HpackHuffmanSymbol Symbol; |
- |
- // DecodeTables are multilevel indexes on code prefixes. Each table indexes |
- // a portion of the prefix mapped to DecodeEntry, which in turn either |
- // captures a terminal symbol, or points to the next DecodeTable to consult |
- // with successive portions of the prefix. |
- struct NET_EXPORT_PRIVATE DecodeEntry { |
- DecodeEntry(); |
- DecodeEntry(uint8 next_table_index, uint8 length, uint16 symbol_id); |
- |
- // The next table to consult. If this is a terminal, |
- // |next_table_index| will be self-referential. |
- uint8 next_table_index; |
- // Bit-length of terminal code, if this is a terminal. Length of the |
- // longest code having this prefix, if non-terminal. |
- uint8 length; |
- // Set only for terminal entries. |
- uint16 symbol_id; |
- }; |
- struct NET_EXPORT_PRIVATE DecodeTable { |
- // Number of bits indexed by the chain leading to this table. |
- uint8 prefix_length; |
- // Number of additional prefix bits this table indexes. |
- uint8 indexed_length; |
- // Entries are represented as a length |size()| slice into |
- // |decode_entries_| beginning at |entries_offset|. |
- size_t entries_offset; |
- // Returns |1 << indexed_length|. |
- size_t size() const; |
- }; |
- |
- HpackHuffmanTable(); |
- ~HpackHuffmanTable(); |
- |
- // Prepares HpackHuffmanTable to encode & decode the canonical Huffman |
- // code as determined by the given symbols. Must be called exactly once. |
- // Returns false if the input symbols define an invalid coding, and true |
- // otherwise. Symbols must be presented in ascending ID order with no gaps, |
- // and |symbol_count| must fit in a uint16. |
- bool Initialize(const Symbol* input_symbols, size_t symbol_count); |
- |
- // Returns whether Initialize() has been successfully called. |
- bool IsInitialized() const; |
- |
- // Encodes the input string to the output stream using the table's Huffman |
- // context. |
- void EncodeString(base::StringPiece in, HpackOutputStream* out) const; |
- |
- // Returns the encoded size of the input string. |
- size_t EncodedSize(base::StringPiece in) const; |
- |
- // Decodes symbols from |in| into |out|. It is the caller's responsibility |
- // to ensure |out| has a reserved a sufficient buffer to hold decoded output. |
- // DecodeString() halts when |in| runs out of input, in which case true is |
- // returned. It also halts (returning false) if an invalid Huffman code |
- // prefix is read, or if |out_capacity| would otherwise be overflowed. |
- bool DecodeString(HpackInputStream* in, |
- size_t out_capacity, |
- std::string* out) const; |
- |
- private: |
- // Expects symbols ordered on length & ID ascending. |
- void BuildDecodeTables(const std::vector<Symbol>& symbols); |
- |
- // Expects symbols ordered on ID ascending. |
- void BuildEncodeTable(const std::vector<Symbol>& symbols); |
- |
- // Adds a new DecodeTable with the argument prefix & indexed length. |
- // Returns the new table index. |
- uint8 AddDecodeTable(uint8 prefix, uint8 indexed); |
- |
- const DecodeEntry& Entry(const DecodeTable& table, uint32 index) const; |
- |
- void SetEntry(const DecodeTable& table, uint32 index, |
- const DecodeEntry& entry); |
- |
- std::vector<DecodeTable> decode_tables_; |
- std::vector<DecodeEntry> decode_entries_; |
- |
- // Symbol code and code length, in ascending symbol ID order. |
- // Codes are stored in the most-significant bits of the word. |
- std::vector<uint32> code_by_id_; |
- std::vector<uint8> length_by_id_; |
- |
- // The first 8 bits of the longest code. Applied when generating padding bits. |
- uint8 pad_bits_; |
- |
- // If initialization fails, preserve the symbol ID which failed validation |
- // for examination in tests. |
- uint16 failed_symbol_id_; |
-}; |
- |
-} // namespace net |
- |
-#endif // NET_SPDY_HPACK_HUFFMAN_TABLE_H_ |