1 // Go support for Protocol Buffers - Google's data interchange format
3 // Copyright 2016 The Go Authors. All rights reserved.
4 // https://github.com/golang/protobuf
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7 // modification, are permitted provided that the following conditions are
10 // * Redistributions of source code must retain the above copyright
11 // notice, this list of conditions and the following disclaimer.
12 // * Redistributions in binary form must reproduce the above
13 // copyright notice, this list of conditions and the following disclaimer
14 // in the documentation and/or other materials provided with the
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18 // this software without specific prior written permission.
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34 // This file implements conversions between google.protobuf.Duration
42 durpb "github.com/golang/protobuf/ptypes/duration"
46 // Range of a durpb.Duration in seconds, as specified in
47 // google/protobuf/duration.proto. This is about 10,000 years in seconds.
48 maxSeconds = int64(10000 * 365.25 * 24 * 60 * 60)
49 minSeconds = -maxSeconds
52 // validateDuration determines whether the durpb.Duration is valid according to the
53 // definition in google/protobuf/duration.proto. A valid durpb.Duration
54 // may still be too large to fit into a time.Duration (the range of durpb.Duration
55 // is about 10,000 years, and the range of time.Duration is about 290).
56 func validateDuration(d *durpb.Duration) error {
58 return errors.New("duration: nil Duration")
60 if d.Seconds < minSeconds || d.Seconds > maxSeconds {
61 return fmt.Errorf("duration: %v: seconds out of range", d)
63 if d.Nanos <= -1e9 || d.Nanos >= 1e9 {
64 return fmt.Errorf("duration: %v: nanos out of range", d)
66 // Seconds and Nanos must have the same sign, unless d.Nanos is zero.
67 if (d.Seconds < 0 && d.Nanos > 0) || (d.Seconds > 0 && d.Nanos < 0) {
68 return fmt.Errorf("duration: %v: seconds and nanos have different signs", d)
73 // Duration converts a durpb.Duration to a time.Duration. Duration
74 // returns an error if the durpb.Duration is invalid or is too large to be
75 // represented in a time.Duration.
76 func Duration(p *durpb.Duration) (time.Duration, error) {
77 if err := validateDuration(p); err != nil {
80 d := time.Duration(p.Seconds) * time.Second
81 if int64(d/time.Second) != p.Seconds {
82 return 0, fmt.Errorf("duration: %v is out of range for time.Duration", p)
85 d += time.Duration(p.Nanos)
86 if (d < 0) != (p.Nanos < 0) {
87 return 0, fmt.Errorf("duration: %v is out of range for time.Duration", p)
93 // DurationProto converts a time.Duration to a durpb.Duration.
94 func DurationProto(d time.Duration) *durpb.Duration {
95 nanos := d.Nanoseconds()
98 return &durpb.Duration{