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