io.netty.util.internal

Class MathUtil

java.lang.Object

io.netty.util.internal.MathUtil

public final class MathUtil
extends Object

Math utility methods.

Method Summary

Methods

Modifier and Type	Method and Description
static int	findNextPositivePowerOfTwo(int value) Fast method of finding the next power of 2 greater than or equal to the supplied value.
static boolean	isOutOfBounds(int index, int length, int capacity) Determine if the requested index and length will fit within capacity.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

findNextPositivePowerOfTwo

public static int findNextPositivePowerOfTwo(int value)

Fast method of finding the next power of 2 greater than or equal to the supplied value. If the value is <= 0 then 1 will be returned. This method is not suitable for Integer.MIN_VALUE or numbers greater than 2^30.

Parameters:

value - from which to search for next power of 2

Returns:

The next power of 2 or the value itself if it is a power of 2

isOutOfBounds

public static boolean isOutOfBounds(int index,
                    int length,
                    int capacity)

Determine if the requested index and length will fit within capacity.

Parameters:

index - The starting index.

length - The length which will be utilized (starting from index).

capacity - The capacity that index + length is allowed to be within.

Returns:

true if the requested index and length will fit within capacity. false if this would result in an index out of bounds exception.