// 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 merkle provides Merkle tree manipulation functions.
package merkle

// parent returns the index of the parent node in the parent level of the tree.
func parent(leafIndex int64) int64 {
	return leafIndex >> 1
}

// isRightChild returns true if the node is a right child.
func isRightChild(leafIndex int64) bool {
	return leafIndex&1 == 1
}
