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77 lines
2.4 KiB
Go
77 lines
2.4 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ptypes
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import (
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"errors"
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"fmt"
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"time"
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durationpb "github.com/golang/protobuf/ptypes/duration"
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)
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// Range of google.protobuf.Duration as specified in duration.proto.
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// This is about 10,000 years in seconds.
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const (
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maxSeconds = int64(10000 * 365.25 * 24 * 60 * 60)
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minSeconds = -maxSeconds
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)
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// Duration converts a durationpb.Duration to a time.Duration.
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// Duration returns an error if dur is invalid or overflows a time.Duration.
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//
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// Deprecated: Call the dur.AsDuration and dur.CheckValid methods instead.
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func Duration(dur *durationpb.Duration) (time.Duration, error) {
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if err := validateDuration(dur); err != nil {
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return 0, err
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}
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d := time.Duration(dur.Seconds) * time.Second
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if int64(d/time.Second) != dur.Seconds {
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return 0, fmt.Errorf("duration: %v is out of range for time.Duration", dur)
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}
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if dur.Nanos != 0 {
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d += time.Duration(dur.Nanos) * time.Nanosecond
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if (d < 0) != (dur.Nanos < 0) {
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return 0, fmt.Errorf("duration: %v is out of range for time.Duration", dur)
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}
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}
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return d, nil
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}
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// DurationProto converts a time.Duration to a durationpb.Duration.
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//
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// Deprecated: Call the durationpb.New function instead.
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func DurationProto(d time.Duration) *durationpb.Duration {
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nanos := d.Nanoseconds()
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secs := nanos / 1e9
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nanos -= secs * 1e9
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return &durationpb.Duration{
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Seconds: int64(secs),
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Nanos: int32(nanos),
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}
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}
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// validateDuration determines whether the durationpb.Duration is valid
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// according to the definition in google/protobuf/duration.proto.
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// A valid durpb.Duration may still be too large to fit into a time.Duration
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// Note that the range of durationpb.Duration is about 10,000 years,
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// while the range of time.Duration is about 290 years.
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func validateDuration(dur *durationpb.Duration) error {
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if dur == nil {
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return errors.New("duration: nil Duration")
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}
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if dur.Seconds < minSeconds || dur.Seconds > maxSeconds {
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return fmt.Errorf("duration: %v: seconds out of range", dur)
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}
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if dur.Nanos <= -1e9 || dur.Nanos >= 1e9 {
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return fmt.Errorf("duration: %v: nanos out of range", dur)
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}
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// Seconds and Nanos must have the same sign, unless d.Nanos is zero.
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if (dur.Seconds < 0 && dur.Nanos > 0) || (dur.Seconds > 0 && dur.Nanos < 0) {
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return fmt.Errorf("duration: %v: seconds and nanos have different signs", dur)
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}
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return nil
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}
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