code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * 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 io.reactivex.rxjava3.internal.util;
  
  public final class Pow2 {
      private Pow2() {
          throw new IllegalStateException("No instances!");
      }
  
      /**
       * 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;
      }
  }
  