Class to represent unsigned 64-bit numbers. : Base64 « Development Class « Java

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Java » Development Class » Base64 




Class to represent unsigned 64-bit numbers.
     
/*
 * D-Bus Java Implementation Copyright (c) 2005-2006 Matthew Johnson This
 * program is free software; you can redistribute it and/or modify it under the
 * terms of either the GNU Lesser General Public License Version 2 or the
 * Academic Free Licence Version 2.1. Full licence texts are included in the
 * COPYING file with this program.
 */
//package org.freedesktop.dbus;

//import static org.freedesktop.dbus.Gettext._;

import java.math.BigInteger;
import java.text.MessageFormat;

/**
 * Class to represent unsigned 64-bit numbers. Warning: Any functions which take
 * or return a <tt>long</tt> are restricted to the range of a signed 64bit
 * number. Use the BigInteger methods if you wish access to the full range.
 */
@SuppressWarnings("serial")
public class UInt64 extends Number implements Comparable<UInt64> {
  /** Maximum allowed value (when accessed as a BigInteger) */
  public static final BigInteger MAX_BIG_VALUE  = new BigInteger("18446744073709551615");
  /** Maximum allowed value (when accessed as a long) */
  public static final long       MAX_LONG_VALUE = Long.MAX_VALUE;
  /** Minimum allowed value */
  public static final long       MIN_VALUE      = 0;
  private long                   bottom;
  private long                   top;
  private BigInteger             value;

  /**
   * Create a UInt64 from a BigInteger
   
   @param value
   *          Must be a valid BigInteger between MIN_VALUE&ndash;MAX_BIG_VALUE
   @throws NumberFormatException
   *           if value is not an integer between MIN_VALUE and MAX_BIG_VALUE
   */
  public UInt64(BigInteger value) {
/*    if (null == value) { throw new NumberFormatException(MessageFormat.format(_("{0} is not between {1} and {2}."), new Object[] {
        value, MIN_VALUE, MAX_BIG_VALUE })); }
    if (0 > value.compareTo(BigInteger.ZERO)) { throw new NumberFormatException(MessageFormat.format(
        _("{0} is not between {1} and {2}."), new Object[] { value, MIN_VALUE, MAX_BIG_VALUE })); }
    if (0 < value.compareTo(MAX_BIG_VALUE)) { throw new NumberFormatException(MessageFormat.format(
        _("{0} is not between {1} and {2}."), new Object[] { value, MIN_VALUE, MAX_BIG_VALUE })); }
  */  this.value = value;
    top = this.value.shiftRight(32).and(new BigInteger("4294967295")).longValue();
    bottom = this.value.and(new BigInteger("4294967295")).longValue();
  }

  /**
   * Create a UInt64 from a long.
   
   @param value
   *          Must be a valid integer within MIN_VALUE&ndash;MAX_VALUE
   @throws NumberFormatException
   *           if value is not between MIN_VALUE and MAX_VALUE
   */
  public UInt64(long value) {
    //if ((value < MIN_VALUE) || (value > MAX_LONG_VALUE)) { throw new NumberFormatException(MessageFormat.format(
     //   _("{0} is not between {1} and {2}."), new Object[] { value, MIN_VALUE, MAX_LONG_VALUE })); }
    this.value = new BigInteger("" + value);
    top = this.value.shiftRight(32).and(new BigInteger("4294967295")).longValue();
    bottom = this.value.and(new BigInteger("4294967295")).longValue();
  }

  /**
   * Create a UInt64 from two longs.
   
   @param top
   *          Most significant 4 bytes.
   @param bottom
   *          Least significant 4 bytes.
   */
  public UInt64(long top, long bottom) {
    BigInteger a = new BigInteger("" + top);
    a = a.shiftLeft(32);
    a = a.add(new BigInteger("" + bottom));
   // if (0 > a.compareTo(BigInteger.ZERO)) { throw new NumberFormatException(MessageFormat.format(
    //    _("{0} is not between {1} and {2}."), new Object[] { a, MIN_VALUE, MAX_BIG_VALUE })); }
    //if (0 < a.compareTo(MAX_BIG_VALUE)) { throw new NumberFormatException(MessageFormat.format(
     //   _("{0} is not between {1} and {2}."), new Object[] { a, MIN_VALUE, MAX_BIG_VALUE })); }
    value = a;
    this.top = top;
    this.bottom = bottom;
  }

  /**
   * Create a UInt64 from a String.
   
   @param value
   *          Must parse to a valid integer within MIN_VALUE&ndash;MAX_BIG_VALUE
   @throws NumberFormatException
   *           if value is not an integer between MIN_VALUE and MAX_BIG_VALUE
   */
  public UInt64(String value) {
    //if (null == value) { throw new NumberFormatException(MessageFormat.format(_("{0} is not between {1} and {2}."), new Object[] {
      //  value, MIN_VALUE, MAX_BIG_VALUE })); }
    BigInteger a = new BigInteger(value);
    this.value = a;
    top = this.value.shiftRight(32).and(new BigInteger("4294967295")).longValue();
    bottom = this.value.and(new BigInteger("4294967295")).longValue();
  }

  /**
   * Least significant 4 bytes.
   */
  public long bottom() {
    return bottom;
  }

  /** The value of this as a byte. */
  @Override
  public byte byteValue() {
    return value.byteValue();
  }

  /**
   * Compare two UInt32s.
   
   @return 0 if equal, -ve or +ve if they are different.
   */
  public int compareTo(UInt64 other) {
    return value.compareTo(other.value);
  }

  /** The value of this as a double. */
  @Override
  public double doubleValue() {
    return value.doubleValue();
  }

  /** Test two UInt64s for equality. */
  @Override
  public boolean equals(Object o) {
    return (instanceof UInt64&& value.equals(((UInt64o).value);
  }

  /** The value of this as a float. */
  @Override
  public float floatValue() {
    return value.floatValue();
  }

  @Override
  public int hashCode() {
    return value.hashCode();
  }

  /** The value of this as a int. */
  @Override
  public int intValue() {
    return value.intValue();
  }

  /** The value of this as a long. */
  @Override
  public long longValue() {
    return value.longValue();
  }

  /** The value of this as a short. */
  @Override
  public short shortValue() {
    return value.shortValue();
  }

  /**
   * Most significant 4 bytes.
   */
  public long top() {
    return top;
  }

  /** The value of this as a string. */
  @Override
  public String toString() {
    return value.toString();
  }

  /** The value of this as a BigInteger. */
  public BigInteger value() {
    return value;
  }
}

   
    
    
    
    
  














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