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package com.github.andyshao.lang;

import java.math.BigInteger;

/**
 * 
 * Title:

 * Descript:

 * Copyright: Copryright(c) Apr 2, 2015

 * Encoding:UNIX UTF-8
 * 
 * @author Andy.Shao
 *
 */
public class IntByteWrapper implements ByteWrapper {

    private static final BigInteger BASE = BigInteger.valueOf(4);

    @Override
    public byte getByte(int[] array , BigInteger index) {
        BigInteger[] indexs = index.divideAndRemainder(IntByteWrapper.BASE);
        if (indexs[1].intValue() < 0) throw new ArrayIndexOutOfBoundsException(index.toString());
        return IntegerOperation.getByte(array[indexs[0].intValue()] , indexs[1].intValue());
    }

    @Override
    public void setByte(int[] array , BigInteger index , byte b) {
        BigInteger[] indexs = index.divideAndRemainder(IntByteWrapper.BASE);
        if (indexs[1].intValue() < 0) throw new ArrayIndexOutOfBoundsException(index.toString());
        array[indexs[0].intValue()] = IntegerOperation.setByte(array[indexs[0].intValue()] , indexs[1].intValue() , b);
    }

    @Override
    public BigInteger size(int[] array) {
        return BigInteger.valueOf(array.length).multiply(IntByteWrapper.BASE);
    }
}