io.servicetalk.utils.internal

Class MathUtils

java.lang.Object

io.servicetalk.utils.internal.MathUtils

public final class MathUtils
extends java.lang.Object

Internal math utilities.

Method Summary

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 int	safeFindNextPositivePowerOfTwo(int value) Fast method of finding the next power of 2 greater than or equal to the supplied value.

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

safeFindNextPositivePowerOfTwo

public static int safeFindNextPositivePowerOfTwo(int value)

Fast method of finding the next power of 2 greater than or equal to the supplied value.

This method will do runtime bounds checking and call findNextPositivePowerOfTwo(int) if within a valid range.

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.

Special cases for return values are as follows:

• <= 0 to 1
• >= 2^30 to 2^30