1 files changed, 90 insertions, 0 deletions

diff --git a/vendor/github.com/google/uuid/node.go b/vendor/github.com/google/uuid/node.go
new file mode 100644
index 0000000..d651a2b
--- /dev/null
+++ b/vendor/github.com/google/uuid/node.go
@@ -0,0 +1,90 @@
+// Copyright 2016 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+        "sync"
+)
+
+var (
+        nodeMu sync.Mutex
+        ifname string  // name of interface being used
+        nodeID [6]byte // hardware for version 1 UUIDs
+        zeroID [6]byte // nodeID with only 0's
+)
+
+// NodeInterface returns the name of the interface from which the NodeID was
+// derived.  The interface "user" is returned if the NodeID was set by
+// SetNodeID.
+func NodeInterface() string {
+        defer nodeMu.Unlock()
+        nodeMu.Lock()
+        return ifname
+}
+
+// SetNodeInterface selects the hardware address to be used for Version 1 UUIDs.
+// If name is "" then the first usable interface found will be used or a random
+// Node ID will be generated.  If a named interface cannot be found then false
+// is returned.
+//
+// SetNodeInterface never fails when name is "".
+func SetNodeInterface(name string) bool {
+        defer nodeMu.Unlock()
+        nodeMu.Lock()
+        return setNodeInterface(name)
+}
+
+func setNodeInterface(name string) bool {
+        iname, addr := getHardwareInterface(name) // null implementation for js
+        if iname != "" && addr != nil {
+                ifname = iname
+                copy(nodeID[:], addr)
+                return true
+        }
+
+        // We found no interfaces with a valid hardware address.  If name
+        // does not specify a specific interface generate a random Node ID
+        // (section 4.1.6)
+        if name == "" {
+                ifname = "random"
+                randomBits(nodeID[:])
+                return true
+        }
+        return false
+}
+
+// NodeID returns a slice of a copy of the current Node ID, setting the Node ID
+// if not already set.
+func NodeID() []byte {
+        defer nodeMu.Unlock()
+        nodeMu.Lock()
+        if nodeID == zeroID {
+                setNodeInterface("")
+        }
+        nid := nodeID
+        return nid[:]
+}
+
+// SetNodeID sets the Node ID to be used for Version 1 UUIDs.  The first 6 bytes
+// of id are used.  If id is less than 6 bytes then false is returned and the
+// Node ID is not set.
+func SetNodeID(id []byte) bool {
+        if len(id) < 6 {
+                return false
+        }
+        defer nodeMu.Unlock()
+        nodeMu.Lock()
+        copy(nodeID[:], id)
+        ifname = "user"
+        return true
+}
+
+// NodeID returns the 6 byte node id encoded in uuid.  It returns nil if uuid is
+// not valid.  The NodeID is only well defined for version 1 and 2 UUIDs.
+func (uuid UUID) NodeID() []byte {
+        var node [6]byte
+        copy(node[:], uuid[10:])
+        return node[:]
+}