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vendor/go.mongodb.org/mongo-driver/x/mongo/driver/uuid/uuid.go

@@ -0,0 +1,37 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package uuid // import "go.mongodb.org/mongo-driver/x/mongo/driver/uuid"
+
+import (
+	"bytes"
+	"crypto/rand"
+	"io"
+)
+
+// UUID represents a UUID.
+type UUID [16]byte
+
+var rander = rand.Reader
+
+// New generates a new uuid.
+func New() (UUID, error) {
+	var uuid [16]byte
+
+	_, err := io.ReadFull(rander, uuid[:])
+	if err != nil {
+		return [16]byte{}, err
+	}
+	uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
+	uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
+
+	return uuid, nil
+}
+
+// Equal returns true if two UUIDs are equal.
+func Equal(a, b UUID) bool {
+	return bytes.Equal([]byte(a[:]), []byte(b[:]))
+}