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Side by Side Diff: net/spdy/core/hpack/hpack_huffman_decoder.h

Issue 2867693004: Snapshot of all changes to get jumbo in blink and content.
Patch Set: Rebased again Created 3 years, 5 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved. 1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef NET_SPDY_CORE_HPACK_HPACK_HUFFMAN_DECODER_H_ 5 #ifndef NET_SPDY_CORE_HPACK_HPACK_HUFFMAN_DECODER_H_
6 #define NET_SPDY_CORE_HPACK_HPACK_HUFFMAN_DECODER_H_ 6 #define NET_SPDY_CORE_HPACK_HPACK_HUFFMAN_DECODER_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 #include <stdint.h> 9 #include <stdint.h>
10 10
11 #include "net/spdy/core/hpack/hpack_input_stream.h" 11 #include "net/spdy/core/hpack/hpack_input_stream.h"
12 #include "net/spdy/platform/api/spdy_export.h" 12 #include "net/spdy/platform/api/spdy_export.h"
13 #include "net/spdy/platform/api/spdy_string.h" 13 #include "net/spdy/platform/api/spdy_string.h"
14 14
15 namespace net { 15 namespace net {
16 namespace test { 16 namespace test {
17 class HpackHuffmanDecoderPeer; 17 class HpackHuffmanDecoderPeer;
18 } // namespace test 18 } // namespace test
19 19
20 // Declared as a class to simplify testing. 20 // Declared as a class to simplify testing.
21 // No instances are actually allocated. 21 // No instances are actually allocated.
22 class SPDY_EXPORT_PRIVATE HpackHuffmanDecoder { 22 class SPDY_EXPORT_PRIVATE SpdyHpackHuffmanDecoder {
23 public: 23 public:
24 typedef uint32_t HuffmanWord; 24 typedef uint32_t HuffmanWord;
25 typedef size_t HuffmanCodeLength; 25 typedef size_t HuffmanCodeLength;
26 26
27 HpackHuffmanDecoder() = delete; 27 SpdyHpackHuffmanDecoder() = delete;
28 28
29 // Decodes a string that has been encoded using the HPACK Huffman Code (see 29 // Decodes a string that has been encoded using the HPACK Huffman Code (see
30 // https://httpwg.github.io/specs/rfc7541.html#huffman.code), reading the 30 // https://httpwg.github.io/specs/rfc7541.html#huffman.code), reading the
31 // encoded bitstream from |*in|, appending each decoded char to |*out|. 31 // encoded bitstream from |*in|, appending each decoded char to |*out|.
32 // To avoid repeatedly growing the |*out| string, the caller should reserve 32 // To avoid repeatedly growing the |*out| string, the caller should reserve
33 // sufficient space in |*out| to hold decoded output. 33 // sufficient space in |*out| to hold decoded output.
34 // DecodeString() halts when |in| runs out of input, in which case true is 34 // DecodeString() halts when |in| runs out of input, in which case true is
35 // returned. It also halts (returning false) if an invalid Huffman code 35 // returned. It also halts (returning false) if an invalid Huffman code
36 // prefix is read. 36 // prefix is read.
37 static bool DecodeString(HpackInputStream* in, SpdyString* out); 37 static bool DecodeString(HpackInputStream* in, SpdyString* out);
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58 HuffmanWord bits); 58 HuffmanWord bits);
59 59
60 // Converts a canonical symbol to the source symbol (the octet in the original 60 // Converts a canonical symbol to the source symbol (the octet in the original
61 // string that was encoded). 61 // string that was encoded).
62 static uint8_t CanonicalToSource(HuffmanWord canonical); 62 static uint8_t CanonicalToSource(HuffmanWord canonical);
63 }; 63 };
64 64
65 } // namespace net 65 } // namespace net
66 66
67 #endif // NET_SPDY_CORE_HPACK_HPACK_HUFFMAN_DECODER_H_ 67 #endif // NET_SPDY_CORE_HPACK_HPACK_HUFFMAN_DECODER_H_
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