java.lang.Object
- org.ojalgo.function.special.PowerOf2

Direct Known Subclasses:

PowerOf2.IntPower, PowerOf2.LongPower
```
public abstract class PowerOf2
extends java.lang.Object
```

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class PowerOf2.IntPower

static class PowerOf2.LongPower

Field Summary

Fields
Modifier and Type	Field	Description
`int`	`exponent`
`private static int[]`	`INT_POWERS`
`private static double`	`LN2`
`private static long[]`	`LONG_POWERS`
`static int`	`MAX_INT`
`static long`	`MAX_LONG`

Constructor Summary

Constructors
Constructor Description

PowerOf2(int exp)

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static long`	`adjustDown(double value)`
`static int`	`adjustDown(float value)`
`static long`	`adjustUp(double value)`
`static int`	`adjustUp(float value)`
`static int`	`exponent(double value)`
`static int`	`find(int value)`	If the input value is a power of 2 then the exponent is returned, if not a negative number is returned.
`static int`	`find(long value)`
`static PowerOf2.IntPower`	`getIntPower(int exponent)`
`static PowerOf2.LongPower`	`getLongPower(int exponent)`
`static boolean`	`isPowerOf2(int value)`
`static boolean`	`isPowerOf2(long value)`
`static int`	`largestNotGreaterThan(int value)`
`static long`	`largestNotGreaterThan(long value)`
`static int`	`powerOf2Larger(int value)`
`static int`	`powerOf2Larger(long value)`
`static int`	`powerOf2Smaller(int value)`
`static int`	`powerOf2Smaller(long value)`
`static int`	`powerOfInt2(int exponent)`
`static long`	`powerOfLong2(int exponent)`
`static int`	`smallestNotLessThan(int value)`
`static long`	`smallestNotLessThan(long value)`

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

Field Detail

MAX_INT
```
public static final int MAX_INT
```

MAX_LONG
```
public static final long MAX_LONG
```

INT_POWERS
```
private static final int[] INT_POWERS
```

LN2
```
private static double LN2
```

LONG_POWERS

private static final long[] LONG_POWERS

exponent
```
public final int exponent
```

Constructor Detail
- PowerOf2
```
PowerOf2(int exp)
```

Method Detail
- adjustDown
```
public static long adjustDown(double value)
```
  See Also:
  
  largestNotGreaterThan(long)
- adjustDown
```
public static int adjustDown(float value)
```
  See Also:
  
  largestNotGreaterThan(int)
- adjustUp
```
public static long adjustUp(double value)
```
  See Also:
  
  smallestNotLessThan(long)
- adjustUp
```
public static int adjustUp(float value)
```
  See Also:
  
  smallestNotLessThan(int)
- exponent
```
public static int exponent(double value)
```
- find
```
public static int find(int value)
```
  If the input value is a power of 2 then the exponent is returned, if not a negative number is returned.
- find
```
public static int find(long value)
```
  See Also:
  
  find(int)
- getIntPower
```
public static PowerOf2.IntPower getIntPower(int exponent)
```
- getLongPower
```
public static PowerOf2.LongPower getLongPower(int exponent)
```
- isPowerOf2
```
public static boolean isPowerOf2(int value)
```
- isPowerOf2
```
public static boolean isPowerOf2(long value)
```
- largestNotGreaterThan
```
public static int largestNotGreaterThan(int value)
```
  Returns:
  
  The largest power of 2 that is less than or equal to the input (not greater than)
- largestNotGreaterThan
```
public static long largestNotGreaterThan(long value)
```
  Returns:
  
  The largest power of 2 that is less than or equal to the input (not greater than)
- powerOf2Larger
```
public static int powerOf2Larger(int value)
```
  Returns:
  
  The smallest integer exponent so that 2^exp >= value.
- powerOf2Larger
```
public static int powerOf2Larger(long value)
```
  Returns:
  
  The smallest integer exponent so that 2^exp >= value.
- powerOf2Smaller
```
public static int powerOf2Smaller(int value)
```
  Returns:
  
  The largest integer exponent so that 2^exp <= value.
- powerOf2Smaller
```
public static int powerOf2Smaller(long value)
```
  Returns:
  
  The largest integer exponent so that 2^exp <= value.
- powerOfInt2
```
public static int powerOfInt2(int exponent)
```
- powerOfLong2
```
public static long powerOfLong2(int exponent)
```
- smallestNotLessThan
```
public static int smallestNotLessThan(int value)
```
  Returns:
  
  The smallest power of 2 that is greater than or equal to the input (not less than)
- smallestNotLessThan
```
public static long smallestNotLessThan(long value)
```
  Returns:
  
  The smallest power of 2 that is greater than or equal to the input (not less than)

Modifier and Type	Class	Description
`static class`	`PowerOf2.IntPower`
`static class`	`PowerOf2.LongPower`

Class PowerOf2

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MAX_INT

MAX_LONG

INT_POWERS

LN2

LONG_POWERS

exponent

Constructor Detail

PowerOf2

Method Detail

adjustDown

adjustDown

adjustUp

adjustUp

exponent

find

find

getIntPower

getLongPower

isPowerOf2

isPowerOf2

largestNotGreaterThan

largestNotGreaterThan

powerOf2Larger

powerOf2Larger

powerOf2Smaller

powerOf2Smaller

powerOfInt2

powerOfLong2

smallestNotLessThan

smallestNotLessThan