001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.utils;
018    
019    import java.util.BitSet;
020    
021    public class BitSetUtils {
022        private BitSetUtils() {
023        }
024    
025        public static int toInt(BitSet bitSet) {
026            int intValue = 0;
027            for (int bit = 0; bit < bitSet.length(); bit++) {
028                if (bitSet.get(bit)) {
029                    intValue |= (1 << bit);
030                }
031            }
032            return intValue;
033        }
034    
035        public static BitSet toBitSet(int value) {
036            BitSet bitSet = new BitSet();
037            int bit = 0;
038            while (value > 0) {
039                bitSet.set(bit++, value % 2 == 1);
040                value >>= 1;
041            }
042            return bitSet;
043        }
044    }