ducky/devices
2015-11-15
Parent:b6494e1a499e
ducky/devices/vendor/code.google.com/p/go-uuid/uuid/version1.go
Implement ListDevicesByOwner. Write a unit test for listing Devices by their Owner property, as per our Storer interface. Basically, if we insert Devices into the datastore, we need to be able to retrieve the Devices that someone owns. Simple enough. This meant that I needed to implement the Memstore version, past the barebones stub, so the tests would continue to pass.
| paddy@0 | 1 // Copyright 2011 Google Inc. All rights reserved. |
| paddy@0 | 2 // Use of this source code is governed by a BSD-style |
| paddy@0 | 3 // license that can be found in the LICENSE file. |
| paddy@0 | 4 |
| paddy@0 | 5 package uuid |
| paddy@0 | 6 |
| paddy@0 | 7 import ( |
| paddy@0 | 8 "encoding/binary" |
| paddy@0 | 9 ) |
| paddy@0 | 10 |
| paddy@0 | 11 // NewUUID returns a Version 1 UUID based on the current NodeID and clock |
| paddy@0 | 12 // sequence, and the current time. If the NodeID has not been set by SetNodeID |
| paddy@0 | 13 // or SetNodeInterface then it will be set automatically. If the NodeID cannot |
| paddy@0 | 14 // be set NewUUID returns nil. If clock sequence has not been set by |
| paddy@0 | 15 // SetClockSequence then it will be set automatically. If GetTime fails to |
| paddy@0 | 16 // return the current NewUUID returns nil. |
| paddy@0 | 17 func NewUUID() UUID { |
| paddy@0 | 18 if nodeID == nil { |
| paddy@0 | 19 SetNodeInterface("") |
| paddy@0 | 20 } |
| paddy@0 | 21 |
| paddy@0 | 22 now, seq, err := GetTime() |
| paddy@0 | 23 if err != nil { |
| paddy@0 | 24 return nil |
| paddy@0 | 25 } |
| paddy@0 | 26 |
| paddy@0 | 27 uuid := make([]byte, 16) |
| paddy@0 | 28 |
| paddy@0 | 29 time_low := uint32(now & 0xffffffff) |
| paddy@0 | 30 time_mid := uint16((now >> 32) & 0xffff) |
| paddy@0 | 31 time_hi := uint16((now >> 48) & 0x0fff) |
| paddy@0 | 32 time_hi |= 0x1000 // Version 1 |
| paddy@0 | 33 |
| paddy@0 | 34 binary.BigEndian.PutUint32(uuid[0:], time_low) |
| paddy@0 | 35 binary.BigEndian.PutUint16(uuid[4:], time_mid) |
| paddy@0 | 36 binary.BigEndian.PutUint16(uuid[6:], time_hi) |
| paddy@0 | 37 binary.BigEndian.PutUint16(uuid[8:], seq) |
| paddy@0 | 38 copy(uuid[10:], nodeID) |
| paddy@0 | 39 |
| paddy@0 | 40 return uuid |
| paddy@0 | 41 } |