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 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 syntax = "proto3";
 
 package google.protobuf;
 
 option cc_enable_arenas = true;
 option go_package = "google.golang.org/protobuf/types/known/durationpb";
 option java_package = "com.google.protobuf";
 option java_outer_classname = "DurationProto";
 option java_multiple_files = true;
 option objc_class_prefix = "GPB";
 option csharp_namespace = "Google.Protobuf.WellKnownTypes";
 
 // A Duration represents a signed, fixed-length span of time represented
 // as a count of seconds and fractions of seconds at nanosecond
 // resolution. It is independent of any calendar and concepts like "day"
 // or "month". It is related to Timestamp in that the difference between
 // two Timestamp values is a Duration and it can be added or subtracted
 // from a Timestamp. Range is approximately +-10,000 years.
 //
 // # Examples
 //
 // Example 1: Compute Duration from two Timestamps in pseudo code.
 //
 //     Timestamp start = ...;
 //     Timestamp end = ...;
 //     Duration duration = ...;
 //
 //     duration.seconds = end.seconds - start.seconds;
 //     duration.nanos = end.nanos - start.nanos;
 //
 //     if (duration.seconds < 0 && duration.nanos > 0) {
 //       duration.seconds += 1;
 //       duration.nanos -= 1000000000;
 //     } else if (duration.seconds > 0 && duration.nanos < 0) {
 //       duration.seconds -= 1;
 //       duration.nanos += 1000000000;
 //     }
 //
 // Example 2: Compute Timestamp from Timestamp + Duration in pseudo code.
 //
 //     Timestamp start = ...;
 //     Duration duration = ...;
 //     Timestamp end = ...;
 //
 //     end.seconds = start.seconds + duration.seconds;
 //     end.nanos = start.nanos + duration.nanos;
 //
 //     if (end.nanos < 0) {
 //       end.seconds -= 1;
 //       end.nanos += 1000000000;
 //     } else if (end.nanos >= 1000000000) {
 //       end.seconds += 1;
 //       end.nanos -= 1000000000;
 //     }
 //
 // Example 3: Compute Duration from datetime.timedelta in Python.
 //
 //     td = datetime.timedelta(days=3, minutes=10)
 //     duration = Duration()
 //     duration.FromTimedelta(td)
 //
 // # JSON Mapping
 //
 // In JSON format, the Duration type is encoded as a string rather than an
 // object, where the string ends in the suffix "s" (indicating seconds) and
 // is preceded by the number of seconds, with nanoseconds expressed as
 // fractional seconds. For example, 3 seconds with 0 nanoseconds should be
 // encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
 // be expressed in JSON format as "3.000000001s", and 3 seconds and 1
 // microsecond should be expressed in JSON format as "3.000001s".
 //
 message Duration {
   // Signed seconds of the span of time. Must be from -315,576,000,000
   // to +315,576,000,000 inclusive. Note: these bounds are computed from:
   // 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
   int64 seconds = 1;
 
   // Signed fractions of a second at nanosecond resolution of the span
   // of time. Durations less than one second are represented with a 0
   // `seconds` field and a positive or negative `nanos` field. For durations
   // of one second or more, a non-zero value for the `nanos` field must be
   // of the same sign as the `seconds` field. Must be from -999,999,999
   // to +999,999,999 inclusive.
   int32 nanos = 2;
 }

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