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tree_id.go
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/
tree_id.go
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// Copyright 2017 Google Inc. All Rights Reserved.
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package storage
import (
"crypto/rand"
"math"
"math/big"
)
// NewTreeID generates a random, positive, non-zero tree ID.
func NewTreeID() (int64, error) {
id, err := rand.Int(rand.Reader, big.NewInt(math.MaxInt64))
if err != nil {
return 0, err
}
return id.Int64() + 1, nil
}