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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 // Some helpers for quic. | 5 // Some helpers for quic. |
6 | 6 |
7 #ifndef NET_QUIC_CORE_QUIC_UTILS_H_ | 7 #ifndef NET_QUIC_CORE_QUIC_UTILS_H_ |
8 #define NET_QUIC_CORE_QUIC_UTILS_H_ | 8 #define NET_QUIC_CORE_QUIC_UTILS_H_ |
9 | 9 |
10 #include <stddef.h> | 10 #include <stddef.h> |
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25 #define QUIC_ALIGNED(X) __declspec(align(X)) | 25 #define QUIC_ALIGNED(X) __declspec(align(X)) |
26 #else | 26 #else |
27 #define QUIC_ALIGN_OF alignof | 27 #define QUIC_ALIGN_OF alignof |
28 #define QUIC_ALIGNED(X) __attribute__((aligned(X))) | 28 #define QUIC_ALIGNED(X) __attribute__((aligned(X))) |
29 #endif // _MSC_VER | 29 #endif // _MSC_VER |
30 | 30 |
31 namespace net { | 31 namespace net { |
32 | 32 |
33 class NET_EXPORT_PRIVATE QuicUtils { | 33 class NET_EXPORT_PRIVATE QuicUtils { |
34 public: | 34 public: |
35 enum Priority { | |
36 LOCAL_PRIORITY, | |
37 PEER_PRIORITY, | |
38 }; | |
39 | |
40 // Returns the 64 bit FNV1a hash of the data. See | 35 // Returns the 64 bit FNV1a hash of the data. See |
41 // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param | 36 // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param |
42 static uint64_t FNV1a_64_Hash(const char* data, int len); | 37 static uint64_t FNV1a_64_Hash(const char* data, int len); |
43 | 38 |
44 // returns the 128 bit FNV1a hash of the data. See | 39 // returns the 128 bit FNV1a hash of the data. See |
45 // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param | 40 // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param |
46 static uint128 FNV1a_128_Hash(const char* data1, int len1); | 41 static uint128 FNV1a_128_Hash(const char* data1, int len1); |
47 | 42 |
48 // returns the 128 bit FNV1a hash of the two sequences of data. See | 43 // returns the 128 bit FNV1a hash of the two sequences of data. See |
49 // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param | 44 // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param |
50 static uint128 FNV1a_128_Hash_Two(const char* data1, | 45 static uint128 FNV1a_128_Hash_Two(const char* data1, |
51 int len1, | 46 int len1, |
52 const char* data2, | 47 const char* data2, |
53 int len2); | 48 int len2); |
54 | 49 |
55 // FindMutualTag sets |out_result| to the first tag in the priority list that | 50 // FindMutualTag sets |out_result| to the first tag in the priority list that |
56 // is also in the other list and returns true. If there is no intersection it | 51 // is also in the other list and returns true. If there is no intersection it |
57 // returns false. | 52 // returns false. |
58 // | 53 // |
59 // Which list has priority is determined by |priority|. | |
60 // | |
61 // If |out_index| is non-nullptr and a match is found then the index of that | 54 // If |out_index| is non-nullptr and a match is found then the index of that |
62 // match in |their_tags| is written to |out_index|. | 55 // match in |their_tags| is written to |out_index|. |
63 static bool FindMutualTag(const QuicTagVector& our_tags, | 56 static bool FindMutualTag(const QuicTagVector& our_tags, |
64 const QuicTag* their_tags, | 57 const QuicTag* their_tags, |
65 size_t num_their_tags, | 58 size_t num_their_tags, |
66 Priority priority, | |
67 QuicTag* out_result, | 59 QuicTag* out_result, |
68 size_t* out_index); | 60 size_t* out_index); |
69 | 61 |
70 // SerializeUint128 writes the first 96 bits of |v| in little-endian form | 62 // SerializeUint128 writes the first 96 bits of |v| in little-endian form |
71 // to |out|. | 63 // to |out|. |
72 static void SerializeUint128Short(uint128 v, uint8_t* out); | 64 static void SerializeUint128Short(uint128 v, uint8_t* out); |
73 | 65 |
74 // Returns the name of the QuicRstStreamErrorCode as a char* | 66 // Returns the name of the QuicRstStreamErrorCode as a char* |
75 static const char* StreamErrorToString(QuicRstStreamErrorCode error); | 67 static const char* StreamErrorToString(QuicRstStreamErrorCode error); |
76 | 68 |
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151 inline QuicIOVector MakeIOVector(base::StringPiece str, struct iovec* iov) { | 143 inline QuicIOVector MakeIOVector(base::StringPiece str, struct iovec* iov) { |
152 iov->iov_base = const_cast<char*>(str.data()); | 144 iov->iov_base = const_cast<char*>(str.data()); |
153 iov->iov_len = static_cast<size_t>(str.size()); | 145 iov->iov_len = static_cast<size_t>(str.size()); |
154 QuicIOVector quic_iov(iov, 1, str.size()); | 146 QuicIOVector quic_iov(iov, 1, str.size()); |
155 return quic_iov; | 147 return quic_iov; |
156 } | 148 } |
157 | 149 |
158 } // namespace net | 150 } // namespace net |
159 | 151 |
160 #endif // NET_QUIC_CORE_QUIC_UTILS_H_ | 152 #endif // NET_QUIC_CORE_QUIC_UTILS_H_ |
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