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authorWim <wim@42.be>2020-08-10 00:29:54 +0200
committerGitHub <noreply@github.com>2020-08-10 00:29:54 +0200
commit4e50fd864921c556988c919269448efdb90fa961 (patch)
treea3625f03f8de3c4f3841364000a4ea3aa42c1533 /vendor/github.com/google/uuid/version1.go
parentdfdffa0027334e55ce213fc6eb62206dbf48baf6 (diff)
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Use mattermost v5 module (#1192)
Diffstat (limited to 'vendor/github.com/google/uuid/version1.go')
-rw-r--r--vendor/github.com/google/uuid/version1.go44
1 files changed, 44 insertions, 0 deletions
diff --git a/vendor/github.com/google/uuid/version1.go b/vendor/github.com/google/uuid/version1.go
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--- /dev/null
+++ b/vendor/github.com/google/uuid/version1.go
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+// 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 (
+ "encoding/binary"
+)
+
+// NewUUID returns a Version 1 UUID based on the current NodeID and clock
+// sequence, and the current time. If the NodeID has not been set by SetNodeID
+// or SetNodeInterface then it will be set automatically. If the NodeID cannot
+// be set NewUUID returns nil. If clock sequence has not been set by
+// SetClockSequence then it will be set automatically. If GetTime fails to
+// return the current NewUUID returns nil and an error.
+//
+// In most cases, New should be used.
+func NewUUID() (UUID, error) {
+ nodeMu.Lock()
+ if nodeID == zeroID {
+ setNodeInterface("")
+ }
+ nodeMu.Unlock()
+
+ var uuid UUID
+ now, seq, err := GetTime()
+ if err != nil {
+ return uuid, err
+ }
+
+ timeLow := uint32(now & 0xffffffff)
+ timeMid := uint16((now >> 32) & 0xffff)
+ timeHi := uint16((now >> 48) & 0x0fff)
+ timeHi |= 0x1000 // Version 1
+
+ binary.BigEndian.PutUint32(uuid[0:], timeLow)
+ binary.BigEndian.PutUint16(uuid[4:], timeMid)
+ binary.BigEndian.PutUint16(uuid[6:], timeHi)
+ binary.BigEndian.PutUint16(uuid[8:], seq)
+ copy(uuid[10:], nodeID[:])
+
+ return uuid, nil
+}