net.dreamlu.iot.mqtt.core.util

类 MathUtil

java.lang.Object

net.dreamlu.iot.mqtt.core.util.MathUtil

public final class MathUtil
extends Object

Math utility methods.

作者:

netty

方法概要

限定符和类型	方法和说明
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.

从类继承的方法 java.lang.Object

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

方法详细资料

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.

参数:

value - from which to search for next power of 2

返回:

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.

参数:

value - from which to search for next power of 2

返回:

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 = 1
• >= 2^30 = 2^30