mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-12-30 05:50:56 +00:00
57 lines
2.1 KiB
Go
57 lines
2.1 KiB
Go
// Copyright 2014 Google Inc. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package uuid
|
|
|
|
import (
|
|
"encoding/binary"
|
|
|
|
guuid "github.com/google/uuid"
|
|
)
|
|
|
|
// A Time represents a time as the number of 100's of nanoseconds since 15 Oct
|
|
// 1582.
|
|
type Time = guuid.Time
|
|
|
|
// GetTime returns the current Time (100s of nanoseconds since 15 Oct 1582) and
|
|
// clock sequence as well as adjusting the clock sequence as needed. An error
|
|
// is returned if the current time cannot be determined.
|
|
func GetTime() (Time, uint16, error) { return guuid.GetTime() }
|
|
|
|
// ClockSequence returns the current clock sequence, generating one if not
|
|
// already set. The clock sequence is only used for Version 1 UUIDs.
|
|
//
|
|
// The uuid package does not use global static storage for the clock sequence or
|
|
// the last time a UUID was generated. Unless SetClockSequence a new random
|
|
// clock sequence is generated the first time a clock sequence is requested by
|
|
// ClockSequence, GetTime, or NewUUID. (section 4.2.1.1) sequence is generated
|
|
// for
|
|
func ClockSequence() int { return guuid.ClockSequence() }
|
|
|
|
// SetClockSequence sets the clock sequence to the lower 14 bits of seq. Setting to
|
|
// -1 causes a new sequence to be generated.
|
|
func SetClockSequence(seq int) { guuid.SetClockSequence(seq) }
|
|
|
|
// Time returns the time in 100s of nanoseconds since 15 Oct 1582 encoded in
|
|
// uuid. It returns false if uuid is not valid. The time is only well defined
|
|
// for version 1 and 2 UUIDs.
|
|
func (uuid UUID) Time() (Time, bool) {
|
|
if len(uuid) != 16 {
|
|
return 0, false
|
|
}
|
|
time := int64(binary.BigEndian.Uint32(uuid[0:4]))
|
|
time |= int64(binary.BigEndian.Uint16(uuid[4:6])) << 32
|
|
time |= int64(binary.BigEndian.Uint16(uuid[6:8])&0xfff) << 48
|
|
return Time(time), true
|
|
}
|
|
|
|
// ClockSequence returns the clock sequence encoded in uuid. It returns false
|
|
// if uuid is not valid. The clock sequence is only well defined for version 1
|
|
// and 2 UUIDs.
|
|
func (uuid UUID) ClockSequence() (int, bool) {
|
|
if len(uuid) != 16 {
|
|
return 0, false
|
|
}
|
|
return int(binary.BigEndian.Uint16(uuid[8:10])) & 0x3fff, true
|
|
}
|