001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.rng.simple.internal;
018
019import org.apache.commons.rng.core.util.NumberFactory;
020
021/**
022 * Creates a {@code long[]} from an {@code int[]}.
023 *
024 * @since 1.0
025 */
026public class IntArray2LongArray implements SeedConverter<int[], long[]> {
027    /** {@inheritDoc} */
028    @Override
029    public long[] convert(int[] seed) {
030        final int outSize = (seed.length + 1) / 2;
031        final long[] out = new long[outSize];
032        for (int i = 0; i < outSize; i++) {
033            final int lo = seed[i];
034            final int hi = outSize + i < seed.length ? seed[outSize + i] : 0;
035            out[i] = NumberFactory.makeLong(hi, lo);
036        }
037
038        return out;
039    }
040}