Java BigInteger to toByteArrayUnsigned(BigInteger bi)

Description

to Byte Array Unsigned

License

Open Source License

Declaration

public static byte[] toByteArrayUnsigned(BigInteger bi) 

Method Source Code

//package com.java2s;
/**// w  w  w .java  2s. co m
 *     Copyright (c) 2013, Will Szumski
 *
 *     This file is part of formicidae.
 *
 *     formicidae is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     formicidae is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with formicidae.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.math.BigInteger;

import java.util.Arrays;

public class Main {
    public static byte[] toByteArrayUnsigned(BigInteger bi) {
        byte[] extractedBytes = bi.toByteArray();
        int skipped = 0;
        boolean skip = true;
        for (byte b : extractedBytes) {
            boolean signByte = b == (byte) 0x00;
            if (skip && signByte) {
                skipped++;
                continue;
            } else if (skip) {
                skip = false;
            }
        }
        extractedBytes = Arrays.copyOfRange(extractedBytes, skipped, extractedBytes.length);
        return extractedBytes;
    }
}

Related

1. stringForBig(BigInteger big, int sigchars)
2. toBase_128(BigInteger val)
3. toByteArray(BigInteger i)
4. toByteArray(final BigInteger b)
5. toByteArray(final BigInteger value, final int numBytes)
6. toBytes(BigInteger bigInt, int expectedSize)
7. toBytesUnsigned(final BigInteger bigInt)
8. toDecimal(BigInteger value, byte[] buffer, int offset, int length, int itemLength, byte pos)
9. toEvenLengthHex(BigInteger value)