001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019
020package org.apache.commons.compress.utils;
021
022/**
023 * PRIVATE.
024 *
025 * Performs exact math through {@link Math} "exact" APIs.
026 */
027public class ExactMath {
028
029    private ExactMath() {
030        // no instances
031    }
032
033    /**
034     * Returns the int result of adding an int and a long, and throws an exception if the result overflows an int.
035     *
036     * @param x the first value, an int.
037     * @param y the second value, a long,
038     * @return the addition of both values.
039     * @throws ArithmeticException when y overflow an int.
040     * @throws ArithmeticException if the result overflows an int.
041     */
042    public static int add(final int x, final long y) {
043        return Math.addExact(x, Math.toIntExact(y));
044    }
045
046}