/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Original License: https://github.com/JCTools/JCTools/blob/master/LICENSE
* Original location: https://github.com/JCTools/JCTools/blob/master/jctools-core/src/main/java/org/jctools/util/Pow2.java
*/
package rx.internal.util.unsafe;
public class Pow2 {
/**
* Find the next larger positive power of two value up from the given value. If value is a power of two then
* this value will be returned.
*
* @param value from which next positive power of two will be found.
* @return the next positive power of 2 or this value if it is a power of 2.
*/
public static int roundToPowerOfTwo(final int value) {
return 1 << (32 - Integer.numberOfLeadingZeros(value - 1));
}
/**
* Is this value a power of two.
*
* @param value to be tested to see if it is a power of two.
* @return true if the value is a power of 2 otherwise false.
*/
public static boolean isPowerOfTwo(final int value) {
return (value & (value - 1)) == 0;
}
}