ducky/devices
2016-01-02
Parent:a700ede02f91
ducky/devices/vendor/github.com/pborman/uuid/version1.go
Update trout to fix routing bug. Update to tip on trout to fix the routing bug that was causing us such issues. See the commit message of trout at 3df515f0cec5 for more details.
1 // Copyright 2011 Google Inc. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 package uuid
7 import (
8 "encoding/binary"
9 )
11 // NewUUID returns a Version 1 UUID based on the current NodeID and clock
12 // sequence, and the current time. If the NodeID has not been set by SetNodeID
13 // or SetNodeInterface then it will be set automatically. If the NodeID cannot
14 // be set NewUUID returns nil. If clock sequence has not been set by
15 // SetClockSequence then it will be set automatically. If GetTime fails to
16 // return the current NewUUID returns nil.
17 func NewUUID() UUID {
18 if nodeID == nil {
19 SetNodeInterface("")
20 }
22 now, seq, err := GetTime()
23 if err != nil {
24 return nil
25 }
27 uuid := make([]byte, 16)
29 time_low := uint32(now & 0xffffffff)
30 time_mid := uint16((now >> 32) & 0xffff)
31 time_hi := uint16((now >> 48) & 0x0fff)
32 time_hi |= 0x1000 // Version 1
34 binary.BigEndian.PutUint32(uuid[0:], time_low)
35 binary.BigEndian.PutUint16(uuid[4:], time_mid)
36 binary.BigEndian.PutUint16(uuid[6:], time_hi)
37 binary.BigEndian.PutUint16(uuid[8:], seq)
38 copy(uuid[10:], nodeID)
40 return uuid
41 }