DoubleUtilities

java.lang.Object
- ptolemy.util.DoubleUtilities

```
public final class DoubleUtilities
extends java.lang.Object
```
Utilities for double primitives. This code is used by ptolemy.actor.util.Time to improve performance.

Since:

Ptolemy II 11.0

Version:

$Id$

Author:

Louis Wasserman, based on https://code.google.com/p/guava-libraries/source/browse/guava/src/com/google/common/math/DoubleUtils.java

Field Summary

Fields
Modifier and Type	Field and Description
`(package private) static int`	`EXPONENT_BIAS`
`(package private) static long`	`EXPONENT_MASK`
`(package private) static long`	`IMPLICIT_BIT`
`(package private) static long`	`SIGN_MASK`
`(package private) static int`	`SIGNIFICAND_BITS`
`(package private) static long`	`SIGNIFICAND_MASK`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static double`	`bigToDouble(java.math.BigInteger x)` Convert a BigInteger to a double using a fast implementation.
`(package private) static double`	`ensureNonNegative(double value)` Returns its argument if it is non-negative, zero if it is negative.
`(package private) static long`	`getSignificand(double d)`
`(package private) static boolean`	`isFinite(double d)`
`(package private) static boolean`	`isNormal(double d)`
`(package private) static double`	`nextDown(double d)`
`(package private) static double`	`scaleNormalize(double x)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - SIGNIFICAND_MASK
```
static final long SIGNIFICAND_MASK
```
    See Also:
    
    Constant Field Values
  - EXPONENT_MASK
```
static final long EXPONENT_MASK
```
    See Also:
    
    Constant Field Values
  - SIGN_MASK
```
static final long SIGN_MASK
```
    See Also:
    
    Constant Field Values
  - SIGNIFICAND_BITS
```
static final int SIGNIFICAND_BITS
```
    See Also:
    
    Constant Field Values
  - EXPONENT_BIAS
```
static final int EXPONENT_BIAS
```
    See Also:
    
    Constant Field Values
  - IMPLICIT_BIT
```
static final long IMPLICIT_BIT
```
    See Also:
    
    Constant Field Values
- Method Detail
  - nextDown
```
static double nextDown(double d)
```
  - getSignificand
```
static long getSignificand(double d)
```
  - isFinite
```
static boolean isFinite(double d)
```
  - isNormal
```
static boolean isNormal(double d)
```
  - scaleNormalize
```
static double scaleNormalize(double x)
```
  - bigToDouble
```
public static double bigToDouble(java.math.BigInteger x)
```
    Convert a BigInteger to a double using a fast implementation.
    
    Parameters:
    
    x - The BigInteger to be converted.
    
    Returns:
    
    the value of the BigInteger as a double.
  - ensureNonNegative
```
static double ensureNonNegative(double value)
```
    Returns its argument if it is non-negative, zero if it is negative.
    
    Parameters:
    
    value - The value to be checked.
    
    Returns:
    
    If value is non-negative, return the value. If the value is negative, then return zero.

Class DoubleUtilities

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

SIGNIFICAND_MASK

EXPONENT_MASK

SIGN_MASK

SIGNIFICAND_BITS

EXPONENT_BIAS

IMPLICIT_BIT

Method Detail

nextDown

getSignificand

isFinite

isNormal

scaleNormalize

bigToDouble

ensureNonNegative