Java BitSet nextClearBitModulo(int index, int poolSize, BitSet bitSet)

Description

Returns index of next clear (false) bit, starting from and including index.

License

Apache License

Parameter

Parameter	Description
index	starting point
poolSize	the bit set size
bitSet	bitset to search

Return

index of next clear bit, starting in index

Declaration

static private int nextClearBitModulo(int index, int poolSize, BitSet bitSet) 

Method Source Code

//package com.java2s;
/*// w  ww.  j  a  va 2s  .co m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.util.BitSet;

public class Main {
    /**
     * Returns index of next clear (false) bit, starting from and including
     * index. If all bits from index to the end are set (true), search from the
     * beginning. Return -1 if all bits are set (true).
     *
     * @param index starting point
     * @param poolSize the bit set size
     * @param bitSet bitset to search
     * @return index of next clear bit, starting in index
     */
    static private int nextClearBitModulo(int index, int poolSize, BitSet bitSet) {

        int indexToSet = bitSet.nextClearBit(index);
        if (indexToSet == poolSize && index != 0) {
            indexToSet = bitSet.nextClearBit(0);
        }
        /* means that all bits are already set, so we return -1 */
        if (indexToSet == poolSize) {
            return -1;
        }

        return indexToSet;
    }
}

Related

1. longToBitSet(long bits)
2. longToBitSet(long value)
3. mapToBitSet(Map map, String key)
4. max(BitSet bits)
5. members(BitSet set)
6. not(BitSet bitSets)
7. or(BitSet bs1, BitSet bs2)
8. pack(BitSet bitSet)
9. padToByteBoundary(BitSet actualParameter, int sizeInBits, int byteBoundLength, boolean preserveFirstAsSign)