ducky/devices
2015-11-12
Parent:b6494e1a499e
ducky/devices/vendor/code.google.com/p/go-uuid/uuid/version1.go
Move DeviceType to its own file, add helper and constants. Make a device_type.go file, to avoid a mess in the devices.go file. Move the DeviceType definition over to the new file. Also, while we're here, set up a few of the contstants we know we'll need. These are the DeviceTypes we intend to support, such as Android phones, Android tablets, and Chrome extensions. Also, set up a helper method that will determine whether a DeviceType is "valid", i.e. if we have a constant defined for it. DeviceTypes, in general, are mostly intended to be used (at the moment, at least) to customise how we display devices to users. Basically, they allow us to display an at least semi-accurate depiction of the device.
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 }