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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_HPACK_ENTRY_H_ | 5 #ifndef NET_SPDY_HPACK_ENTRY_H_ |
6 #define NET_SPDY_HPACK_ENTRY_H_ | 6 #define NET_SPDY_HPACK_ENTRY_H_ |
7 | 7 |
8 #include <cstddef> | 8 #include <cstddef> |
9 #include <set> | 9 #include <set> |
10 #include <string> | 10 #include <string> |
11 | 11 |
12 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
13 #include "base/macros.h" | 13 #include "base/macros.h" |
14 #include "base/strings/string_piece.h" | 14 #include "base/strings/string_piece.h" |
15 #include "net/base/net_export.h" | 15 #include "net/base/net_export.h" |
16 | 16 |
17 // All section references below are to | 17 // All section references below are to |
18 // http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-08 | 18 // http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-08 |
19 | 19 |
20 namespace net { | 20 namespace net { |
21 | 21 |
22 // A structure for an entry in the header table (3.2) and the | 22 // A structure for an entry in the static table (3.3.1) |
23 // reference set (3.3). | 23 // and the header table (3.3.2). |
24 class NET_EXPORT_PRIVATE HpackEntry { | 24 class NET_EXPORT_PRIVATE HpackEntry { |
25 public: | 25 public: |
26 // The constant amount added to name().size() and value().size() to | 26 // The constant amount added to name().size() and value().size() to |
27 // get the size of an HpackEntry as defined in 5.1. | 27 // get the size of an HpackEntry as defined in 5.1. |
28 static const size_t kSizeOverhead; | 28 static const size_t kSizeOverhead; |
29 | 29 |
30 // Creates an entry. Preconditions: | 30 // Creates an entry. Preconditions: |
31 // - |is_static| captures whether this entry is a member of the static | 31 // - |is_static| captures whether this entry is a member of the static |
32 // or dynamic header table. | 32 // or dynamic header table. |
33 // - |insertion_index| is this entry's index in the total set of entries ever | 33 // - |insertion_index| is this entry's index in the total set of entries ever |
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53 const std::string& name() const { return name_; } | 53 const std::string& name() const { return name_; } |
54 const std::string& value() const { return value_; } | 54 const std::string& value() const { return value_; } |
55 | 55 |
56 // Returns whether this entry is a member of the static (as opposed to | 56 // Returns whether this entry is a member of the static (as opposed to |
57 // dynamic) table. | 57 // dynamic) table. |
58 bool IsStatic() const { return type_ == STATIC; } | 58 bool IsStatic() const { return type_ == STATIC; } |
59 | 59 |
60 // Returns whether this entry is a lookup-only entry. | 60 // Returns whether this entry is a lookup-only entry. |
61 bool IsLookup() const { return type_ == LOOKUP; } | 61 bool IsLookup() const { return type_ == LOOKUP; } |
62 | 62 |
63 // Returns and sets the state of the entry, or zero if never set. | |
64 // The semantics of |state| are specific to the encoder or decoder. | |
65 uint8 state() const { return state_; } | |
66 void set_state(uint8 state) { state_ = state; } | |
67 | |
68 // Used to compute the entry's index in the header table. | 63 // Used to compute the entry's index in the header table. |
69 size_t InsertionIndex() const { return insertion_index_; } | 64 size_t InsertionIndex() const { return insertion_index_; } |
70 | 65 |
71 // Returns the size of an entry as defined in 5.1. | 66 // Returns the size of an entry as defined in 5.1. |
72 static size_t Size(base::StringPiece name, base::StringPiece value); | 67 static size_t Size(base::StringPiece name, base::StringPiece value); |
73 size_t Size() const; | 68 size_t Size() const; |
74 | 69 |
75 std::string GetDebugString() const; | 70 std::string GetDebugString() const; |
76 | 71 |
77 private: | 72 private: |
78 enum EntryType { | 73 enum EntryType { |
79 LOOKUP, | 74 LOOKUP, |
80 DYNAMIC, | 75 DYNAMIC, |
81 STATIC, | 76 STATIC, |
82 }; | 77 }; |
83 | 78 |
84 // TODO(jgraettinger): Reduce copies, possibly via SpdyPinnableBufferPiece. | 79 // TODO(jgraettinger): Reduce copies, possibly via SpdyPinnableBufferPiece. |
85 std::string name_; | 80 std::string name_; |
86 std::string value_; | 81 std::string value_; |
87 | 82 |
88 // The entry's index in the total set of entries ever inserted into the header | 83 // The entry's index in the total set of entries ever inserted into the header |
89 // table. | 84 // table. |
90 size_t insertion_index_; | 85 size_t insertion_index_; |
91 | 86 |
92 uint8 state_; | |
93 EntryType type_; | 87 EntryType type_; |
94 }; | 88 }; |
95 | 89 |
96 } // namespace net | 90 } // namespace net |
97 | 91 |
98 #endif // NET_SPDY_HPACK_ENTRY_H_ | 92 #endif // NET_SPDY_HPACK_ENTRY_H_ |
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