MathUtils.cpp

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/*
 * Copyright 2022 HEAVY.AI, Inc.
 *
 * 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.
 */

namespace shared {

bool isPowOfTwo(unsigned n) {
  return (n & (n - 1)) == 0;
}

unsigned getExpOfTwo(unsigned n) {
  unsigned i = 0;

  while ((n = n >> 1)) {
    ++i;
  }

  return i;
}

}  // namespace shared