/*
 * Copyright 2015 Goldman Sachs.
 *
 * 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.gs.collections.impl;

public final class SpreadFunctions
{
    private SpreadFunctions()
    {
    }

    private static int thirtyTwoBitSpread1(int code)
    {
        int code1 = code;
        code1 ^= code1 >>> 15;
        code1 *= 0xACAB2A4D;
        code1 ^= code1 >>> 15;
        code1 *= 0x5CC7DF53;
        code1 ^= code1 >>> 12;
        return code1;
    }

    private static int thirtyTwoBitSpread2(int code)
    {
        int code1 = code;
        code1 ^= code1 >>> 14;
        code1 *= 0xBA1CCD33;
        code1 ^= code1 >>> 13;
        code1 *= 0x9B6296CB;
        code1 ^= code1 >>> 12;
        return code1;
    }

    private static long sixtyFourBitSpread1(long code)
    {
        long code1 = code;
        code1 ^= code1 >>> 28;
        code1 *= -4254747342703917655L;
        code1 ^= code1 >>> 43;
        code1 *= -908430792394475837L;
        code1 ^= code1 >>> 23;
        return code1;
    }

    private static long sixtyFourBitSpread2(long code)
    {
        long code1 = code;
        code1 ^= code1 >>> 23;
        code1 *= -6261870919139520145L;
        code1 ^= code1 >>> 39;
        code1 *= 2747051607443084853L;
        code1 ^= code1 >>> 37;
        return code1;
    }

    public static long doubleSpreadOne(double element)
    {
        long code = Double.doubleToLongBits(element);
        return SpreadFunctions.sixtyFourBitSpread1(code);
    }

    public static long doubleSpreadTwo(double element)
    {
        long code = Double.doubleToLongBits(element);
        return SpreadFunctions.sixtyFourBitSpread2(code);
    }

    public static long longSpreadOne(long element)
    {
        return SpreadFunctions.sixtyFourBitSpread1(element);
    }

    public static long longSpreadTwo(long element)
    {
        return SpreadFunctions.sixtyFourBitSpread2(element);
    }

    public static int intSpreadOne(int element)
    {
        return SpreadFunctions.thirtyTwoBitSpread1(element);
    }

    public static int intSpreadTwo(int element)
    {
        return SpreadFunctions.thirtyTwoBitSpread2(element);
    }

    public static int floatSpreadOne(float element)
    {
        int code = Float.floatToIntBits(element);
        return SpreadFunctions.thirtyTwoBitSpread1(code);
    }

    public static int floatSpreadTwo(float element)
    {
        int code = Float.floatToIntBits(element);
        return SpreadFunctions.thirtyTwoBitSpread2(code);
    }

    public static int shortSpreadOne(short element)
    {
        int code = (int) element;
        return SpreadFunctions.thirtyTwoBitSpread1(code);
    }

    public static int shortSpreadTwo(short element)
    {
        int code = (int) element;
        return SpreadFunctions.thirtyTwoBitSpread2(code);
    }

    public static int charSpreadOne(char element)
    {
        int code = (int) element;
        return SpreadFunctions.thirtyTwoBitSpread1(code);
    }

    public static int charSpreadTwo(char element)
    {
        int code = (int) element;
        return SpreadFunctions.thirtyTwoBitSpread2(code);
    }
}