com.swirlds.merkle.tree.internal.BitUtil Maven / Gradle / Ivy
/*
* Copyright (C) 2016-2024 Hedera Hashgraph, LLC
*
* 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 com.swirlds.merkle.tree.internal;
public final class BitUtil {
private static final int BITS_LIMIT = 62;
private BitUtil() {}
/**
* Finds b = leftmost 1 bit in size (assuming size > 1)
*
* @param value
* > 1
* @return leftmost 1 bit
*/
public static long findLeftMostBit(final long value) {
if (value == 0) {
return 0;
}
long leftMostBit = 1L << BITS_LIMIT;
while ((value & leftMostBit) == 0) {
leftMostBit >>= 1;
}
return leftMostBit;
}
}