| // Go support for Protocol Buffers - Google's data interchange format |
| // |
| // Copyright 2016 The Go Authors. All rights reserved. |
| // https://github.com/golang/protobuf |
| // |
| // 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. |
| |
| package ptypes |
| |
| // This file implements conversions between google.protobuf.Duration |
| // and time.Duration. |
| |
| import ( |
| "errors" |
| "fmt" |
| "time" |
| |
| durpb "github.com/golang/protobuf/ptypes/duration" |
| ) |
| |
| const ( |
| // Range of a durpb.Duration in seconds, as specified in |
| // google/protobuf/duration.proto. This is about 10,000 years in seconds. |
| maxSeconds = int64(10000 * 365.25 * 24 * 60 * 60) |
| minSeconds = -maxSeconds |
| ) |
| |
| // validateDuration determines whether the durpb.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 (the range of durpb.Duration |
| // is about 10,000 years, and the range of time.Duration is about 290). |
| func validateDuration(d *durpb.Duration) error { |
| if d == nil { |
| return errors.New("duration: nil Duration") |
| } |
| if d.Seconds < minSeconds || d.Seconds > maxSeconds { |
| return fmt.Errorf("duration: %v: seconds out of range", d) |
| } |
| if d.Nanos <= -1e9 || d.Nanos >= 1e9 { |
| return fmt.Errorf("duration: %v: nanos out of range", d) |
| } |
| // Seconds and Nanos must have the same sign, unless d.Nanos is zero. |
| if (d.Seconds < 0 && d.Nanos > 0) || (d.Seconds > 0 && d.Nanos < 0) { |
| return fmt.Errorf("duration: %v: seconds and nanos have different signs", d) |
| } |
| return nil |
| } |
| |
| // Duration converts a durpb.Duration to a time.Duration. Duration |
| // returns an error if the durpb.Duration is invalid or is too large to be |
| // represented in a time.Duration. |
| func Duration(p *durpb.Duration) (time.Duration, error) { |
| if err := validateDuration(p); err != nil { |
| return 0, err |
| } |
| d := time.Duration(p.Seconds) * time.Second |
| if int64(d/time.Second) != p.Seconds { |
| return 0, fmt.Errorf("duration: %v is out of range for time.Duration", p) |
| } |
| if p.Nanos != 0 { |
| d += time.Duration(p.Nanos) |
| if (d < 0) != (p.Nanos < 0) { |
| return 0, fmt.Errorf("duration: %v is out of range for time.Duration", p) |
| } |
| } |
| return d, nil |
| } |
| |
| // DurationProto converts a time.Duration to a durpb.Duration. |
| func DurationProto(d time.Duration) *durpb.Duration { |
| nanos := d.Nanoseconds() |
| secs := nanos / 1e9 |
| nanos -= secs * 1e9 |
| return &durpb.Duration{ |
| Seconds: secs, |
| Nanos: int32(nanos), |
| } |
| } |