Example usage for java.math BigInteger and

Introduction

In this page you can find the example usage for java.math BigInteger and.

Prototype

public BigInteger and(BigInteger val) 

Source Link

Document

Returns a BigInteger whose value is (this & val) .

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    byte[] bytes = new byte[] { 0x1, 0x00, 0x00 };
    BigInteger bi = new BigInteger(bytes);
    bi = bi.and(bi);
}

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From source file:Main.java

public static void main(String[] args) {

    // assign values to bi1, bi2
    BigInteger bi1 = new BigInteger("6"); // 110
    BigInteger bi2 = new BigInteger("3"); // 011

    // perform and operation on bi1 using bi2
    BigInteger bi3 = bi1.and(bi2);

    System.out.println(bi3);//from  w ww. ja  v a  2  s.  c o m
}

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From source file:Main.java

/**
 * Convert to base 128 (bigendian), using shifts.
 * @param val//from   w  ww .  j  av  a  2s. com
 * @return
 */
public static ArrayList<Integer> base128(BigInteger val) {
    ArrayList<Integer> result = new ArrayList<Integer>();
    int part = val.and(BN127).intValue();
    val = val.shiftRight(7);
    result.add(0, new Integer(part));
    while (!val.equals(BigInteger.ZERO)) {
        part = val.and(BN127).intValue();
        val = val.shiftRight(7);
        part += 128;
        result.add(0, new Integer(part));
    }
    ;
    return result;
}

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From source file:Main.java

static BigInteger mulmod(BigInteger a, BigInteger b, BigInteger p) {
    BigInteger r = BigInteger.ZERO;
    while (b.compareTo(BigInteger.ZERO) > 0) {
        if (!b.and(BigInteger.ONE).equals(BigInteger.ZERO)) {
            r = addmod(r, a, p);/*from   w w  w. ja  v a 2 s . com*/
        }
        b = b.shiftRight(1);
        a = addmod(a, a, p);
    }
    return r;
}

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From source file:biz.karms.sinkit.ejb.util.CIDRUtils.java

public static ImmutablePair<String, String> getStartEndAddresses(final String cidr)
        throws UnknownHostException {
    //TODO: This is silly. Refactor CIDRUtils so as to accept actual IPs as well as subnets.
    //TODO: Validate the thing before processing. Guava?
    final String fixedCIDR;
    if (!cidr.contains("/")) {
        //IPv6? Hmmm...
        if (cidr.contains(":")) {
            fixedCIDR = cidr + "/128";
        } else {/*from  w  ww.ja v  a2s . com*/
            fixedCIDR = cidr + "/32";
        }
    } else {
        fixedCIDR = cidr;
    }
    final int index = fixedCIDR.indexOf("/");
    final InetAddress inetAddress = InetAddress.getByName(fixedCIDR.substring(0, index));
    final int prefixLength = Integer.parseInt(fixedCIDR.substring(index + 1));

    final ByteBuffer maskBuffer;
    if (inetAddress.getAddress().length == 4) {
        maskBuffer = ByteBuffer.allocate(4).putInt(-1);
    } else {
        maskBuffer = ByteBuffer.allocate(16).putLong(-1L).putLong(-1L);
    }

    final BigInteger mask = (new BigInteger(1, maskBuffer.array())).not().shiftRight(prefixLength);
    final ByteBuffer buffer = ByteBuffer.wrap(inetAddress.getAddress());
    final BigInteger ipVal = new BigInteger(1, buffer.array());
    final BigInteger startIp = ipVal.and(mask);
    final BigInteger endIp = startIp.add(mask.not());

    return new ImmutablePair<>(String.format("%040d", startIp), String.format("%040d", endIp));
}

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From source file:org.voltdb.hadoop.Digester.java

/**
 * Generate a {@code UUID} representation of the MD5 digest for the given content. This is possible because MD5
 * digests and UUIDs are both 128 bit long
 *
 * @param aContent//w  w  w . ja  v  a 2 s  . c o  m
 *            a content {@code String}
 * @return a {@code UUID} representation of the computed MD5 digest
 * @throws DigesterException
 *             upon failed cryptographic operation
 */
public final static UUID digestMD5asUUID(String aContent) throws DigestException {
    if (aContent == null)
        return null;

    BigInteger bi = digestMD5asBigInteger(aContent);
    return new UUID(bi.shiftRight(64).longValue(), bi.and(LSB_MASK).longValue());
}

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From source file:com.wms.utils.DataUtil.java

public static String numberToIpv4(BigInteger ipNumber) {

    String ipString = "";
    BigInteger a = new BigInteger("FF", 16);

    for (int i = 0; i < 4; i++) {
        ipString = ipNumber.and(a).toString() + "." + ipString;

        ipNumber = ipNumber.shiftRight(8);
    }//  ww  w . j av  a2 s  .co m

    return ipString.substring(0, ipString.length() - 1);
}

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From source file:com.wms.utils.DataUtil.java

public static String numberToIPv6(BigInteger ipNumber) {
    String ipString = "";
    BigInteger a = new BigInteger("FFFF", 16);

    for (int i = 0; i < 8; i++) {
        ipString = ipNumber.and(a).toString(16) + ":" + ipString;

        ipNumber = ipNumber.shiftRight(16);
    }//from   w  w  w. j av  a 2 s  .c o m

    return ipString.substring(0, ipString.length() - 1);

}

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From source file:net.spfbl.whois.SubnetIPv6.java

public static String getNextIPv6(String ip) {
    if (ip == null) {
        return null;
    } else if (SubnetIPv6.isValidIPv6(ip)) {
        BigInteger address = new BigInteger(1, address(ip));
        if (address.equals(ADDRESS_MAX)) {
            return null;
        } else {/*from   w w w  . j a v  a 2s  . co  m*/
            address = address.add(ADDRESS_UNIT);
            int p8 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p7 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p6 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p5 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p4 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p3 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p2 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p1 = address.and(ADDRESS_OCTET).intValue();
            return Integer.toHexString(p1) + ":" + Integer.toHexString(p2) + ":" + Integer.toHexString(p3) + ":"
                    + Integer.toHexString(p4) + ":" + Integer.toHexString(p5) + ":" + Integer.toHexString(p6)
                    + ":" + Integer.toHexString(p7) + ":" + Integer.toHexString(p8);
        }
    } else {
        return null;
    }
}

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From source file:net.spfbl.whois.SubnetIPv6.java

public static String getPreviousIPv6(String ip) {
    if (ip == null) {
        return null;
    } else if (SubnetIPv6.isValidIPv6(ip)) {
        BigInteger address = new BigInteger(1, address(ip));
        if (address.equals(ADDRESS_MIN)) {
            return null;
        } else {/*  w w w  .ja  v  a 2  s  .c om*/
            address = address.subtract(ADDRESS_UNIT);
            int p8 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p7 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p6 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p5 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p4 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p3 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p2 = address.and(ADDRESS_OCTET).intValue();
            address = address.shiftRight(16);
            int p1 = address.and(ADDRESS_OCTET).intValue();
            return Integer.toHexString(p1) + ":" + Integer.toHexString(p2) + ":" + Integer.toHexString(p3) + ":"
                    + Integer.toHexString(p4) + ":" + Integer.toHexString(p5) + ":" + Integer.toHexString(p6)
                    + ":" + Integer.toHexString(p7) + ":" + Integer.toHexString(p8);
        }
    } else {
        return null;
    }
}

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