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
6 // Redistribution and use in source and binary forms, with or without
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
16 // * Neither the name of Google Inc. nor the names of its
17 // contributors may be used to endorse or promote products derived from
18 // this software without specific prior written permission.
20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 // This file implements conversions between google.protobuf.Duration
44 // Range of a Duration in seconds, as specified in
45 // google/protobuf/duration.proto. This is about 10,000 years in seconds.
46 maxSeconds = int64(10000 * 365.25 * 24 * 60 * 60)
47 minSeconds = -maxSeconds
50 // validateDuration determines whether the Duration is valid according to the
51 // definition in google/protobuf/duration.proto. A valid Duration
52 // may still be too large to fit into a time.Duration (the range of Duration
53 // is about 10,000 years, and the range of time.Duration is about 290).
54 func validateDuration(d *duration) error {
56 return errors.New("duration: nil Duration")
58 if d.Seconds < minSeconds || d.Seconds > maxSeconds {
59 return fmt.Errorf("duration: %#v: seconds out of range", d)
61 if d.Nanos <= -1e9 || d.Nanos >= 1e9 {
62 return fmt.Errorf("duration: %#v: nanos out of range", d)
64 // Seconds and Nanos must have the same sign, unless d.Nanos is zero.
65 if (d.Seconds < 0 && d.Nanos > 0) || (d.Seconds > 0 && d.Nanos < 0) {
66 return fmt.Errorf("duration: %#v: seconds and nanos have different signs", d)
71 // DurationFromProto converts a Duration to a time.Duration. DurationFromProto
72 // returns an error if the Duration is invalid or is too large to be
73 // represented in a time.Duration.
74 func durationFromProto(p *duration) (time.Duration, error) {
75 if err := validateDuration(p); err != nil {
78 d := time.Duration(p.Seconds) * time.Second
79 if int64(d/time.Second) != p.Seconds {
80 return 0, fmt.Errorf("duration: %#v is out of range for time.Duration", p)
83 d += time.Duration(p.Nanos)
84 if (d < 0) != (p.Nanos < 0) {
85 return 0, fmt.Errorf("duration: %#v is out of range for time.Duration", p)
91 // DurationProto converts a time.Duration to a Duration.
92 func durationProto(d time.Duration) *duration {
93 nanos := d.Nanoseconds()