ducky/devices

Paddy 2015-11-12 Parent:b6494e1a499e

1:600326d50e74 Go to Latest

ducky/devices/vendor/code.google.com/p/go-uuid/uuid/dce.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.

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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 "fmt"
paddy@0 10 "os"
paddy@0 11 )
paddy@0 12
paddy@0 13 // A Domain represents a Version 2 domain
paddy@0 14 type Domain byte
paddy@0 15
paddy@0 16 // Domain constants for DCE Security (Version 2) UUIDs.
paddy@0 17 const (
paddy@0 18 Person = Domain(0)
paddy@0 19 Group = Domain(1)
paddy@0 20 Org = Domain(2)
paddy@0 21 )
paddy@0 22
paddy@0 23 // NewDCESecurity returns a DCE Security (Version 2) UUID.
paddy@0 24 //
paddy@0 25 // The domain should be one of Person, Group or Org.
paddy@0 26 // On a POSIX system the id should be the users UID for the Person
paddy@0 27 // domain and the users GID for the Group. The meaning of id for
paddy@0 28 // the domain Org or on non-POSIX systems is site defined.
paddy@0 29 //
paddy@0 30 // For a given domain/id pair the same token may be returned for up to
paddy@0 31 // 7 minutes and 10 seconds.
paddy@0 32 func NewDCESecurity(domain Domain, id uint32) UUID {
paddy@0 33 uuid := NewUUID()
paddy@0 34 if uuid != nil {
paddy@0 35 uuid[6] = (uuid[6] & 0x0f) | 0x20 // Version 2
paddy@0 36 uuid[9] = byte(domain)
paddy@0 37 binary.BigEndian.PutUint32(uuid[0:], id)
paddy@0 38 }
paddy@0 39 return uuid
paddy@0 40 }
paddy@0 41
paddy@0 42 // NewDCEPerson returns a DCE Security (Version 2) UUID in the person
paddy@0 43 // domain with the id returned by os.Getuid.
paddy@0 44 //
paddy@0 45 // NewDCEPerson(Person, uint32(os.Getuid()))
paddy@0 46 func NewDCEPerson() UUID {
paddy@0 47 return NewDCESecurity(Person, uint32(os.Getuid()))
paddy@0 48 }
paddy@0 49
paddy@0 50 // NewDCEGroup returns a DCE Security (Version 2) UUID in the group
paddy@0 51 // domain with the id returned by os.Getgid.
paddy@0 52 //
paddy@0 53 // NewDCEGroup(Group, uint32(os.Getgid()))
paddy@0 54 func NewDCEGroup() UUID {
paddy@0 55 return NewDCESecurity(Group, uint32(os.Getgid()))
paddy@0 56 }
paddy@0 57
paddy@0 58 // Domain returns the domain for a Version 2 UUID or false.
paddy@0 59 func (uuid UUID) Domain() (Domain, bool) {
paddy@0 60 if v, _ := uuid.Version(); v != 2 {
paddy@0 61 return 0, false
paddy@0 62 }
paddy@0 63 return Domain(uuid[9]), true
paddy@0 64 }
paddy@0 65
paddy@0 66 // Id returns the id for a Version 2 UUID or false.
paddy@0 67 func (uuid UUID) Id() (uint32, bool) {
paddy@0 68 if v, _ := uuid.Version(); v != 2 {
paddy@0 69 return 0, false
paddy@0 70 }
paddy@0 71 return binary.BigEndian.Uint32(uuid[0:4]), true
paddy@0 72 }
paddy@0 73
paddy@0 74 func (d Domain) String() string {
paddy@0 75 switch d {
paddy@0 76 case Person:
paddy@0 77 return "Person"
paddy@0 78 case Group:
paddy@0 79 return "Group"
paddy@0 80 case Org:
paddy@0 81 return "Org"
paddy@0 82 }
paddy@0 83 return fmt.Sprintf("Domain%d", int(d))
paddy@0 84 }