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uuid.go
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/
uuid.go
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// 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[:]))
}