Example usage for java.math BigInteger xor

Introduction

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

Prototype

public BigInteger xor(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.xor(bi);
}

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From source file:Main.java

public static void main(String[] args) {

    BigInteger bi1 = new BigInteger("8");
    BigInteger bi2 = new BigInteger("-6");

    // perform xor on bi1, bi2 and assign result to bi3
    BigInteger bi3 = bi1.xor(bi2);

    System.out.println(bi3);/*from w  ww  . ja  va  2 s.com*/
}

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From source file:Main.java

public static int getNafWeight(BigInteger k) {
    if (k.signum() == 0) {
        return 0;
    }//from   w w  w.  j  a v  a2  s.com

    BigInteger _3k = k.shiftLeft(1).add(k);
    BigInteger diff = _3k.xor(k);

    return diff.bitCount();
}

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From source file:Main.java

public static BigInteger hashFnv1A(byte[] data) {
    final BigInteger INIT64 = new BigInteger("cbf29ce484222325", 16);
    final BigInteger PRIME64 = new BigInteger("100000001b3", 16);
    final BigInteger MOD64 = new BigInteger("2").pow(64);

    BigInteger hash = INIT64;

    for (byte b : data) {
        hash = hash.xor(BigInteger.valueOf((int) b & 0xff));
        hash = hash.multiply(PRIME64).mod(MOD64);
    }/* w w  w  .j av  a2s.co m*/

    return hash;
}

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From source file:Main.java

public static byte[] generateNaf(BigInteger k) {
    if (k.signum() == 0) {
        return EMPTY_BYTES;
    }/*from   w w  w  . j  av  a2 s.  c  o  m*/

    BigInteger _3k = k.shiftLeft(1).add(k);

    int digits = _3k.bitLength() - 1;
    byte[] naf = new byte[digits];

    BigInteger diff = _3k.xor(k);

    for (int i = 1; i < digits; ++i) {
        if (diff.testBit(i)) {
            naf[i - 1] = (byte) (k.testBit(i) ? -1 : 1);
            ++i;
        }
    }

    naf[digits - 1] = 1;

    return naf;
}

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From source file:com.wirecard.ezlinkwebservices.util.TerminalUtil.java

public static synchronized String strXor(String s1, String s2) {
    System.out.println("strXor=" + s1 + "  " + s2);
    BigInteger one = new BigInteger(s1, 16);
    BigInteger two = new BigInteger(s2, 16);
    BigInteger three = one.xor(two);
    String s3 = three.toString(16);
    System.out.println(s3);/*from ww  w . j  av  a2 s .  c  o m*/
    return s3;
}

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From source file:Main.java

public static int[] generateCompactNaf(BigInteger k) {
    if ((k.bitLength() >>> 16) != 0) {
        throw new IllegalArgumentException("'k' must have bitlength < 2^16");
    }/*from  w  ww  . jav a 2s  .com*/
    if (k.signum() == 0) {
        return EMPTY_INTS;
    }

    BigInteger _3k = k.shiftLeft(1).add(k);

    int bits = _3k.bitLength();
    int[] naf = new int[bits >> 1];

    BigInteger diff = _3k.xor(k);

    int highBit = bits - 1, length = 0, zeroes = 0;
    for (int i = 1; i < highBit; ++i) {
        if (!diff.testBit(i)) {
            ++zeroes;
            continue;
        }

        int digit = k.testBit(i) ? -1 : 1;
        naf[length++] = (digit << 16) | zeroes;
        zeroes = 1;
        ++i;
    }

    naf[length++] = (1 << 16) | zeroes;

    if (naf.length > length) {
        naf = trim(naf, length);
    }

    return naf;
}

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

public static boolean checkValidateIPv4(String fromIPAddress, String toIPAddress, int mask) {

    BigInteger fromIP = ipv4ToNumber(fromIPAddress);
    BigInteger toIP = ipv4ToNumber(toIPAddress);
    BigInteger subnet = new BigInteger("FFFFFFFF", 16);

    fromIP = fromIP.shiftRight(32 - mask).shiftLeft(32 - mask);
    subnet = subnet.shiftRight(mask);/* ww  w .  ja  v  a 2s. com*/

    BigInteger broadcastIP = fromIP.xor(subnet);

    if (toIP.compareTo(broadcastIP) == 1) {
        return false;
    }

    return true;
}

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From source file:org.springframework.cloud.consul.bus.EventService.java

/**
 * from https://github.com/hashicorp/consul/blob/master/api/event.go#L90-L104 //
 * IDToIndex is a bit of a hack. This simulates the index generation to // convert an
 * event ID into a WaitIndex. func (e *Event) IDToIndex(uuid string) uint64 { lower :=
 * uuid[0:8] + uuid[9:13] + uuid[14:18] upper := uuid[19:23] + uuid[24:36] lowVal, err
 * := strconv.ParseUint(lower, 16, 64) if err != nil { panic("Failed to convert " +
 * lower) } highVal, err := strconv.ParseUint(upper, 16, 64) if err != nil {
 * panic("Failed to convert " + upper) } return lowVal ^ highVal //^ bitwise XOR
 * integers }//from w  w w . j a v  a  2s.  c o  m
 */
public BigInteger toIndex(String eventId) {
    String lower = eventId.substring(0, 8) + eventId.substring(9, 13) + eventId.substring(14, 18);
    String upper = eventId.substring(19, 23) + eventId.substring(24, 36);
    BigInteger lowVal = new BigInteger(lower, 16);
    BigInteger highVal = new BigInteger(upper, 16);
    BigInteger index = lowVal.xor(highVal);
    return index;
}

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

public static boolean checkValidateIPv6(String fromIPAddress, String toIPAddress, int mask) {

    BigInteger fromIP = ipv6ToNumber(fromIPAddress);
    BigInteger toIP = ipv6ToNumber(toIPAddress);
    BigInteger limit = toIP.subtract(fromIP);
    if (limit.compareTo(new BigInteger(MAX_NUMBER_RANGE)) == 1) {
        return false;
    }//from   w ww . j a v a  2  s  .  co m
    BigInteger subnet = new BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 16);

    fromIP = fromIP.shiftRight(128 - mask).shiftLeft(128 - mask);
    subnet = subnet.shiftRight(mask);

    BigInteger broadcastIP = fromIP.xor(subnet);

    if (toIP.compareTo(broadcastIP) == 1) {
        return false;
    }

    return true;
}

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