OLD | NEW |
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 // Some helpers for quic that are for chromium codebase. | 5 // Some helpers for quic that are for chromium codebase. |
6 | 6 |
7 #ifndef NET_QUIC_QUIC_UTILS_CHROMIUM_H_ | 7 #ifndef NET_QUIC_QUIC_UTILS_CHROMIUM_H_ |
8 #define NET_QUIC_QUIC_UTILS_CHROMIUM_H_ | 8 #define NET_QUIC_QUIC_UTILS_CHROMIUM_H_ |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
(...skipping 14 matching lines...) Expand all Loading... |
25 // operator[] for lookup is discouraged for several reasons: | 25 // operator[] for lookup is discouraged for several reasons: |
26 // * It has a side-effect of inserting missing keys | 26 // * It has a side-effect of inserting missing keys |
27 // * It is not thread-safe (even when it is not inserting, it can still | 27 // * It is not thread-safe (even when it is not inserting, it can still |
28 // choose to resize the underlying storage) | 28 // choose to resize the underlying storage) |
29 // * It invalidates iterators (when it chooses to resize) | 29 // * It invalidates iterators (when it chooses to resize) |
30 // * It default constructs a value object even if it doesn't need to | 30 // * It default constructs a value object even if it doesn't need to |
31 // | 31 // |
32 // This version assumes the key is printable, and includes it in the fatal log | 32 // This version assumes the key is printable, and includes it in the fatal log |
33 // message. | 33 // message. |
34 template <class Collection> | 34 template <class Collection> |
35 const typename Collection::value_type::second_type& | 35 const typename Collection::value_type::second_type& FindOrDie( |
36 FindOrDie(const Collection& collection, | 36 const Collection& collection, |
37 const typename Collection::value_type::first_type& key) { | 37 const typename Collection::value_type::first_type& key) { |
38 typename Collection::const_iterator it = collection.find(key); | 38 typename Collection::const_iterator it = collection.find(key); |
39 CHECK(it != collection.end()) << "Map key not found: " << key; | 39 CHECK(it != collection.end()) << "Map key not found: " << key; |
40 return it->second; | 40 return it->second; |
41 } | 41 } |
42 | 42 |
43 // Same as above, but returns a non-const reference. | 43 // Same as above, but returns a non-const reference. |
44 template <class Collection> | 44 template <class Collection> |
45 typename Collection::value_type::second_type& | 45 typename Collection::value_type::second_type& FindOrDie( |
46 FindOrDie(Collection& collection, // NOLINT | 46 Collection& collection, // NOLINT |
47 const typename Collection::value_type::first_type& key) { | 47 const typename Collection::value_type::first_type& key) { |
48 typename Collection::iterator it = collection.find(key); | 48 typename Collection::iterator it = collection.find(key); |
49 CHECK(it != collection.end()) << "Map key not found: " << key; | 49 CHECK(it != collection.end()) << "Map key not found: " << key; |
50 return it->second; | 50 return it->second; |
51 } | 51 } |
52 | 52 |
53 // Returns a pointer to the const value associated with the given key if it | 53 // Returns a pointer to the const value associated with the given key if it |
54 // exists, or NULL otherwise. | 54 // exists, or NULL otherwise. |
55 template <class Collection> | 55 template <class Collection> |
56 const typename Collection::value_type::second_type* | 56 const typename Collection::value_type::second_type* FindOrNull( |
57 FindOrNull(const Collection& collection, | 57 const Collection& collection, |
58 const typename Collection::value_type::first_type& key) { | 58 const typename Collection::value_type::first_type& key) { |
59 typename Collection::const_iterator it = collection.find(key); | 59 typename Collection::const_iterator it = collection.find(key); |
60 if (it == collection.end()) { | 60 if (it == collection.end()) { |
61 return 0; | 61 return 0; |
62 } | 62 } |
63 return &it->second; | 63 return &it->second; |
64 } | 64 } |
65 | 65 |
66 // Same as above but returns a pointer to the non-const value. | 66 // Same as above but returns a pointer to the non-const value. |
67 template <class Collection> | 67 template <class Collection> |
68 typename Collection::value_type::second_type* | 68 typename Collection::value_type::second_type* FindOrNull( |
69 FindOrNull(Collection& collection, // NOLINT | 69 Collection& collection, // NOLINT |
70 const typename Collection::value_type::first_type& key) { | 70 const typename Collection::value_type::first_type& key) { |
71 typename Collection::iterator it = collection.find(key); | 71 typename Collection::iterator it = collection.find(key); |
72 if (it == collection.end()) { | 72 if (it == collection.end()) { |
73 return 0; | 73 return 0; |
74 } | 74 } |
75 return &it->second; | 75 return &it->second; |
76 } | 76 } |
77 | 77 |
78 } // namespace net | 78 } // namespace net |
79 | 79 |
80 #endif // NET_QUIC_QUIC_UTILS_CHROMIUM_H_ | 80 #endif // NET_QUIC_QUIC_UTILS_CHROMIUM_H_ |
OLD | NEW |