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Side by Side Diff: sync/internal_api/public/base/unique_position.h

Issue 1477433005: Remove kuint8max. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@kint4
Patch Set: rebase Created 5 years ago
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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 #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_UNIQUE_POSITION_H_ 5 #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_UNIQUE_POSITION_H_
6 #define SYNC_INTERNAL_API_PUBLIC_BASE_UNIQUE_POSITION_H_ 6 #define SYNC_INTERNAL_API_PUBLIC_BASE_UNIQUE_POSITION_H_
7 7
8 #include <stdint.h>
9
8 #include <string> 10 #include <string>
9 11
10 #include "base/basictypes.h"
11 #include "sync/base/sync_export.h" 12 #include "sync/base/sync_export.h"
12 13
13 namespace sync_pb { 14 namespace sync_pb {
14 class UniquePosition; 15 class UniquePosition;
15 } 16 }
16 17
17 namespace syncer { 18 namespace syncer {
18 19
19 // A class to represent positions. 20 // A class to represent positions.
20 // 21 //
(...skipping 32 matching lines...) Expand 10 before | Expand all | Expand 10 after
53 // Returns an invalid position. 54 // Returns an invalid position.
54 static UniquePosition CreateInvalid(); 55 static UniquePosition CreateInvalid();
55 56
56 // Converts from a 'sync_pb::UniquePosition' protobuf to a UniquePosition. 57 // Converts from a 'sync_pb::UniquePosition' protobuf to a UniquePosition.
57 // This may return an invalid position if the parsing fails. 58 // This may return an invalid position if the parsing fails.
58 static UniquePosition FromProto(const sync_pb::UniquePosition& proto); 59 static UniquePosition FromProto(const sync_pb::UniquePosition& proto);
59 60
60 // Creates a position with the given suffix. Ordering among positions created 61 // Creates a position with the given suffix. Ordering among positions created
61 // from this function is the same as that of the integer parameters that were 62 // from this function is the same as that of the integer parameters that were
62 // passed in. 63 // passed in.
63 static UniquePosition FromInt64(int64 i, const std::string& suffix); 64 static UniquePosition FromInt64(int64_t i, const std::string& suffix);
64 65
65 // Returns a valid position. Its ordering is not defined. 66 // Returns a valid position. Its ordering is not defined.
66 static UniquePosition InitialPosition(const std::string& suffix); 67 static UniquePosition InitialPosition(const std::string& suffix);
67 68
68 // Returns positions compare smaller than, greater than, or between the input 69 // Returns positions compare smaller than, greater than, or between the input
69 // positions. 70 // positions.
70 static UniquePosition Before(const UniquePosition& x, 71 static UniquePosition Before(const UniquePosition& x,
71 const std::string& suffix); 72 const std::string& suffix);
72 static UniquePosition After(const UniquePosition& x, 73 static UniquePosition After(const UniquePosition& x,
73 const std::string& suffix); 74 const std::string& suffix);
(...skipping 12 matching lines...) Expand all
86 87
87 // Serializes the protobuf representation of this object as a string. 88 // Serializes the protobuf representation of this object as a string.
88 void SerializeToString(std::string* blob) const; 89 void SerializeToString(std::string* blob) const;
89 90
90 // Returns a human-readable representation of this item's internal state. 91 // Returns a human-readable representation of this item's internal state.
91 std::string ToDebugString() const; 92 std::string ToDebugString() const;
92 93
93 // Returns the suffix. 94 // Returns the suffix.
94 std::string GetSuffixForTest() const; 95 std::string GetSuffixForTest() const;
95 96
96 // Performs a lossy conversion to an int64 position. Positions converted to 97 // Performs a lossy conversion to an int64_t position. Positions converted to
97 // and from int64s using this and the FromInt64 function should maintain their 98 // and from int64_ts using this and the FromInt64 function should maintain
98 // relative orderings unless the int64 values conflict. 99 // their
99 int64 ToInt64() const; 100 // relative orderings unless the int64_t values conflict.
101 int64_t ToInt64() const;
100 102
101 bool IsValid() const; 103 bool IsValid() const;
102 104
103 private: 105 private:
104 friend class UniquePositionTest; 106 friend class UniquePositionTest;
105 107
106 // Returns a string X such that (X ++ |suffix|) < |str|. 108 // Returns a string X such that (X ++ |suffix|) < |str|.
107 // |str| must be a trailing substring of a valid ordinal. 109 // |str| must be a trailing substring of a valid ordinal.
108 // |suffix| must be a valid unique suffix. 110 // |suffix| must be a valid unique suffix.
109 static std::string FindSmallerWithSuffix(const std::string& str, 111 static std::string FindSmallerWithSuffix(const std::string& str,
(...skipping 25 matching lines...) Expand all
135 137
136 // The position value after it has been run through the custom compression 138 // The position value after it has been run through the custom compression
137 // algorithm. See Compress() and Uncompress() functions above. 139 // algorithm. See Compress() and Uncompress() functions above.
138 std::string compressed_; 140 std::string compressed_;
139 bool is_valid_; 141 bool is_valid_;
140 }; 142 };
141 143
142 } // namespace syncer; 144 } // namespace syncer;
143 145
144 #endif // SYNC_INTERNAL_API_PUBLIC_BASE_UNIQUE_POSITION_H_ 146 #endif // SYNC_INTERNAL_API_PUBLIC_BASE_UNIQUE_POSITION_H_
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