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Fresh dep ensure
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87
vendor/github.com/pborman/uuid/time.go
generated
vendored
87
vendor/github.com/pborman/uuid/time.go
generated
vendored
@ -6,65 +6,18 @@ package uuid
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import (
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"encoding/binary"
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"sync"
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"time"
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guuid "github.com/google/uuid"
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)
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// A Time represents a time as the number of 100's of nanoseconds since 15 Oct
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// 1582.
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type Time int64
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const (
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lillian = 2299160 // Julian day of 15 Oct 1582
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unix = 2440587 // Julian day of 1 Jan 1970
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epoch = unix - lillian // Days between epochs
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g1582 = epoch * 86400 // seconds between epochs
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g1582ns100 = g1582 * 10000000 // 100s of a nanoseconds between epochs
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)
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var (
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timeMu sync.Mutex
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lasttime uint64 // last time we returned
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clock_seq uint16 // clock sequence for this run
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timeNow = time.Now // for testing
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)
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// UnixTime converts t the number of seconds and nanoseconds using the Unix
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// epoch of 1 Jan 1970.
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func (t Time) UnixTime() (sec, nsec int64) {
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sec = int64(t - g1582ns100)
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nsec = (sec % 10000000) * 100
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sec /= 10000000
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return sec, nsec
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}
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type Time = guuid.Time
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// GetTime returns the current Time (100s of nanoseconds since 15 Oct 1582) and
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// clock sequence as well as adjusting the clock sequence as needed. An error
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// is returned if the current time cannot be determined.
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func GetTime() (Time, uint16, error) {
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defer timeMu.Unlock()
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timeMu.Lock()
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return getTime()
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}
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func getTime() (Time, uint16, error) {
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t := timeNow()
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// If we don't have a clock sequence already, set one.
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if clock_seq == 0 {
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setClockSequence(-1)
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}
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now := uint64(t.UnixNano()/100) + g1582ns100
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// If time has gone backwards with this clock sequence then we
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// increment the clock sequence
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if now <= lasttime {
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clock_seq = ((clock_seq + 1) & 0x3fff) | 0x8000
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}
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lasttime = now
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return Time(now), clock_seq, nil
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}
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func GetTime() (Time, uint16, error) { return guuid.GetTime() }
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// ClockSequence returns the current clock sequence, generating one if not
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// already set. The clock sequence is only used for Version 1 UUIDs.
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@ -74,39 +27,11 @@ func getTime() (Time, uint16, error) {
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// clock sequence is generated the first time a clock sequence is requested by
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// ClockSequence, GetTime, or NewUUID. (section 4.2.1.1) sequence is generated
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// for
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func ClockSequence() int {
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defer timeMu.Unlock()
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timeMu.Lock()
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return clockSequence()
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}
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func clockSequence() int {
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if clock_seq == 0 {
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setClockSequence(-1)
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}
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return int(clock_seq & 0x3fff)
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}
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func ClockSequence() int { return guuid.ClockSequence() }
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// SetClockSeq sets the clock sequence to the lower 14 bits of seq. Setting to
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// -1 causes a new sequence to be generated.
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func SetClockSequence(seq int) {
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defer timeMu.Unlock()
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timeMu.Lock()
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setClockSequence(seq)
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}
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func setClockSequence(seq int) {
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if seq == -1 {
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var b [2]byte
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randomBits(b[:]) // clock sequence
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seq = int(b[0])<<8 | int(b[1])
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}
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old_seq := clock_seq
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clock_seq = uint16(seq&0x3fff) | 0x8000 // Set our variant
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if old_seq != clock_seq {
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lasttime = 0
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}
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}
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func SetClockSequence(seq int) { guuid.SetClockSequence(seq) }
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// Time returns the time in 100s of nanoseconds since 15 Oct 1582 encoded in
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// uuid. It returns false if uuid is not valid. The time is only well defined
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