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+ // Protocol Buffers - Google's data interchange format
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+ // Copyright 2008 Google Inc. All rights reserved.
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+ // https://developers.google.com/protocol-buffers/
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+ //
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+ // Redistribution and use in source and binary forms, with or without
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+ // modification, are permitted provided that the following conditions are
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+ // met:
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+ //
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+ // * Redistributions of source code must retain the above copyright
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+ // notice, this list of conditions and the following disclaimer.
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+ // * Redistributions in binary form must reproduce the above
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+ // copyright notice, this list of conditions and the following disclaimer
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+ // in the documentation and/or other materials provided with the
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+ // distribution.
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+ // * Neither the name of Google Inc. nor the names of its
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+ // contributors may be used to endorse or promote products derived from
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+ // this software without specific prior written permission.
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+ //
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+ // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+ // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+ // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+ // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+ // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+ // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+
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+ syntax = "proto3" ;
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+
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+ package google.protobuf ;
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+
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+ option cc_enable_arenas = true ;
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+ option go_package = "google.golang.org/protobuf/types/known/timestamppb" ;
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+ option java_package = "com.google.protobuf" ;
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+ option java_outer_classname = "TimestampProto" ;
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+ option java_multiple_files = true ;
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+ option objc_class_prefix = "GPB" ;
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+ option csharp_namespace = "Google.Protobuf.WellKnownTypes" ;
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+
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+ // A Timestamp represents a point in time independent of any time zone or local
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+ // calendar, encoded as a count of seconds and fractions of seconds at
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+ // nanosecond resolution. The count is relative to an epoch at UTC midnight on
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+ // January 1, 1970, in the proleptic Gregorian calendar which extends the
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+ // Gregorian calendar backwards to year one.
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+ //
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+ // All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
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+ // second table is needed for interpretation, using a [24-hour linear
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+ // smear](https://developers.google.com/time/smear).
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+ //
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+ // The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
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+ // restricting to that range, we ensure that we can convert to and from [RFC
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+ // 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings.
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+ //
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+ // # Examples
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+ //
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+ // Example 1: Compute Timestamp from POSIX `time()`.
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+ //
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+ // Timestamp timestamp;
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+ // timestamp.set_seconds(time(NULL));
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+ // timestamp.set_nanos(0);
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+ //
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+ // Example 2: Compute Timestamp from POSIX `gettimeofday()`.
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+ //
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+ // struct timeval tv;
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+ // gettimeofday(&tv, NULL);
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+ //
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+ // Timestamp timestamp;
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+ // timestamp.set_seconds(tv.tv_sec);
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+ // timestamp.set_nanos(tv.tv_usec * 1000);
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+ //
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+ // Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
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+ //
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+ // FILETIME ft;
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+ // GetSystemTimeAsFileTime(&ft);
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+ // UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
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+ //
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+ // // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
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+ // // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
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+ // Timestamp timestamp;
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+ // timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
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+ // timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
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+ //
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+ // Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
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+ //
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+ // long millis = System.currentTimeMillis();
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+ //
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+ // Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
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+ // .setNanos((int) ((millis % 1000) * 1000000)).build();
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+ //
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+ // Example 5: Compute Timestamp from Java `Instant.now()`.
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+ //
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+ // Instant now = Instant.now();
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+ //
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+ // Timestamp timestamp =
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+ // Timestamp.newBuilder().setSeconds(now.getEpochSecond())
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+ // .setNanos(now.getNano()).build();
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+ //
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+ // Example 6: Compute Timestamp from current time in Python.
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+ //
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+ // timestamp = Timestamp()
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+ // timestamp.GetCurrentTime()
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+ //
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+ // # JSON Mapping
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+ //
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+ // In JSON format, the Timestamp type is encoded as a string in the
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+ // [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
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+ // format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
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+ // where {year} is always expressed using four digits while {month}, {day},
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+ // {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
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+ // seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
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+ // are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
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+ // is required. A proto3 JSON serializer should always use UTC (as indicated by
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+ // "Z") when printing the Timestamp type and a proto3 JSON parser should be
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+ // able to accept both UTC and other timezones (as indicated by an offset).
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+ //
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+ // For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
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+ // 01:30 UTC on January 15, 2017.
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+ //
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+ // In JavaScript, one can convert a Date object to this format using the
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+ // standard
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+ // [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
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+ // method. In Python, a standard `datetime.datetime` object can be converted
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+ // to this format using
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+ // [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with
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+ // the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
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+ // the Joda Time's [`ISODateTimeFormat.dateTime()`](
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+ // http://joda-time.sourceforge.net/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime()
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+ // ) to obtain a formatter capable of generating timestamps in this format.
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+ //
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+ message Timestamp {
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+ // Represents seconds of UTC time since Unix epoch
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+ // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
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+ // 9999-12-31T23:59:59Z inclusive.
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+ int64 seconds = 1 ;
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+
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+ // Non-negative fractions of a second at nanosecond resolution. Negative
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+ // second values with fractions must still have non-negative nanos values
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+ // that count forward in time. Must be from 0 to 999,999,999
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+ // inclusive.
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+ int32 nanos = 2 ;
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+ }
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