/src/muduo/muduo/base/TimeZone.h
Line | Count | Source |
1 | | // Use of this source code is governed by a BSD-style license |
2 | | // that can be found in the License file. |
3 | | // |
4 | | // Author: Shuo Chen (chenshuo at chenshuo dot com) |
5 | | |
6 | | #ifndef MUDUO_BASE_TIMEZONE_H |
7 | | #define MUDUO_BASE_TIMEZONE_H |
8 | | |
9 | | #include "muduo/base/copyable.h" |
10 | | #include "muduo/base/Types.h" |
11 | | #include <memory> |
12 | | #include <time.h> |
13 | | |
14 | | namespace muduo |
15 | | { |
16 | | |
17 | | // Local time in unspecified timezone. |
18 | | // A minute is always 60 seconds, no leap seconds. |
19 | | struct DateTime |
20 | | { |
21 | 0 | DateTime() {} |
22 | | explicit DateTime(const struct tm&); |
23 | | DateTime(int _year, int _month, int _day, int _hour, int _minute, int _second) |
24 | | : year(_year), month(_month), day(_day), hour(_hour), minute(_minute), second(_second) |
25 | 0 | { |
26 | 0 | } |
27 | | |
28 | | // "2011-12-31 12:34:56" |
29 | | string toIsoString() const; |
30 | | |
31 | | int year = 0; // [1900, 2500] |
32 | | int month = 0; // [1, 12] |
33 | | int day = 0; // [1, 31] |
34 | | int hour = 0; // [0, 23] |
35 | | int minute = 0; // [0, 59] |
36 | | int second = 0; // [0, 59] |
37 | | }; |
38 | | |
39 | | // TimeZone for 1970~2100 |
40 | | class TimeZone : public muduo::copyable |
41 | | { |
42 | | public: |
43 | | TimeZone() = default; // an invalid timezone |
44 | | TimeZone(int eastOfUtc, const char* tzname); // a fixed timezone |
45 | | |
46 | | static TimeZone UTC(); |
47 | | static TimeZone China(); // Fixed at GMT+8, no DST |
48 | | static TimeZone loadZoneFile(const char* zonefile); |
49 | | |
50 | | // default copy ctor/assignment/dtor are Okay. |
51 | | |
52 | | bool valid() const |
53 | 0 | { |
54 | | // 'explicit operator bool() const' in C++11 |
55 | 0 | return static_cast<bool>(data_); |
56 | 0 | } |
57 | | |
58 | | struct DateTime toLocalTime(int64_t secondsSinceEpoch, int* utcOffset = nullptr) const; |
59 | | int64_t fromLocalTime(const struct DateTime&, bool postTransition = false) const; |
60 | | |
61 | | // gmtime(3) |
62 | | static struct DateTime toUtcTime(int64_t secondsSinceEpoch); |
63 | | // timegm(3) |
64 | | static int64_t fromUtcTime(const struct DateTime&); |
65 | | |
66 | | struct Data; |
67 | | |
68 | | private: |
69 | | explicit TimeZone(std::unique_ptr<Data> data); |
70 | | |
71 | | std::shared_ptr<Data> data_; |
72 | | |
73 | | friend class TimeZoneTestPeer; |
74 | | }; |
75 | | |
76 | | } // namespace muduo |
77 | | |
78 | | #endif // MUDUO_BASE_TIMEZONE_H |