1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
9 // * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 // * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
15 // * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 package google.protobuf;
35 option csharp_namespace = "Google.Protobuf.WellKnownTypes";
36 option cc_enable_arenas = true;
37 option go_package = "github.com/golang/protobuf/ptypes/timestamp";
38 option java_package = "com.google.protobuf";
39 option java_outer_classname = "TimestampProto";
40 option java_multiple_files = true;
41 option objc_class_prefix = "GPB";
43 // A Timestamp represents a point in time independent of any time zone or local
44 // calendar, encoded as a count of seconds and fractions of seconds at
45 // nanosecond resolution. The count is relative to an epoch at UTC midnight on
46 // January 1, 1970, in the proleptic Gregorian calendar which extends the
47 // Gregorian calendar backwards to year one.
49 // All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
50 // second table is needed for interpretation, using a [24-hour linear
51 // smear](https://developers.google.com/time/smear).
53 // The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
54 // restricting to that range, we ensure that we can convert to and from [RFC
55 // 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings.
59 // Example 1: Compute Timestamp from POSIX `time()`.
61 // Timestamp timestamp;
62 // timestamp.set_seconds(time(NULL));
63 // timestamp.set_nanos(0);
65 // Example 2: Compute Timestamp from POSIX `gettimeofday()`.
68 // gettimeofday(&tv, NULL);
70 // Timestamp timestamp;
71 // timestamp.set_seconds(tv.tv_sec);
72 // timestamp.set_nanos(tv.tv_usec * 1000);
74 // Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
77 // GetSystemTimeAsFileTime(&ft);
78 // UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
80 // // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
81 // // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
82 // Timestamp timestamp;
83 // timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
84 // timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
86 // Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
88 // long millis = System.currentTimeMillis();
90 // Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
91 // .setNanos((int) ((millis % 1000) * 1000000)).build();
94 // Example 5: Compute Timestamp from current time in Python.
96 // timestamp = Timestamp()
97 // timestamp.GetCurrentTime()
101 // In JSON format, the Timestamp type is encoded as a string in the
102 // [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
103 // format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
104 // where {year} is always expressed using four digits while {month}, {day},
105 // {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
106 // seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
107 // are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
108 // is required. A proto3 JSON serializer should always use UTC (as indicated by
109 // "Z") when printing the Timestamp type and a proto3 JSON parser should be
110 // able to accept both UTC and other timezones (as indicated by an offset).
112 // For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
113 // 01:30 UTC on January 15, 2017.
115 // In JavaScript, one can convert a Date object to this format using the
116 // standard [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
117 // method. In Python, a standard `datetime.datetime` object can be converted
118 // to this format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
119 // with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one
120 // can use the Joda Time's [`ISODateTimeFormat.dateTime()`](
121 // http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D
122 // ) to obtain a formatter capable of generating timestamps in this format.
127 // Represents seconds of UTC time since Unix epoch
128 // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
129 // 9999-12-31T23:59:59Z inclusive.
132 // Non-negative fractions of a second at nanosecond resolution. Negative
133 // second values with fractions must still have non-negative nanos values
134 // that count forward in time. Must be from 0 to 999,999,999