wireguard-go/tai64n/tai64n.go
Jason A. Donenfeld d4112d9096 global: bump copyright
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2021-01-28 17:52:15 +01:00

36 lines
701 B
Go

/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
*/
package tai64n
import (
"bytes"
"encoding/binary"
"time"
)
const TimestampSize = 12
const base = uint64(0x400000000000000a)
const whitenerMask = uint32(0x1000000 - 1)
type Timestamp [TimestampSize]byte
func stamp(t time.Time) Timestamp {
var tai64n Timestamp
secs := base + uint64(t.Unix())
nano := uint32(t.Nanosecond()) &^ whitenerMask
binary.BigEndian.PutUint64(tai64n[:], secs)
binary.BigEndian.PutUint32(tai64n[8:], nano)
return tai64n
}
func Now() Timestamp {
return stamp(time.Now())
}
func (t1 Timestamp) After(t2 Timestamp) bool {
return bytes.Compare(t1[:], t2[:]) > 0
}