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authorTaras Madan <tarasmadan@google.com>2022-09-05 14:27:54 +0200
committerGitHub <noreply@github.com>2022-09-05 12:27:54 +0000
commitb2f2446b46bf02821d90ebedadae2bf7ae0e880e (patch)
tree923cf42842918d6bebca1d6bbdc08abed54d274d /vendor/github.com/google/uuid/node.go
parente6654faff4bcca4be92e9a8596fd4b77f747c39e (diff)
go.mod, vendor: update (#3358)
* go.mod, vendor: remove unnecessary dependencies Commands: 1. go mod tidy 2. go mod vendor * go.mod, vendor: update cloud.google.com/go Commands: 1. go get -u cloud.google.com/go 2. go mod tidy 3. go mod vendor * go.mod, vendor: update cloud.google.com/* Commands: 1. go get -u cloud.google.com/storage cloud.google.com/logging 2. go mod tidy 3. go mod vendor * go.mod, .golangci.yml, vendor: update *lint* Commands: 1. go get -u golang.org/x/tools github.com/golangci/golangci-lint@v1.47.0 2. go mod tidy 3. go mod vendor 4. edit .golangci.yml to suppress new errors (resolved in the same PR later) * all: fix lint errors hash.go: copy() recommended by gosimple parse.go: ent is never nil verifier.go: signal.Notify() with unbuffered channel is bad. Have no idea why. * .golangci.yml: adjust godot rules check-all is deprecated, but still work if you're hesitating too - I'll remove this commit
Diffstat (limited to 'vendor/github.com/google/uuid/node.go')
-rw-r--r--vendor/github.com/google/uuid/node.go90
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 000000000..d651a2b06
--- /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[:]
+}