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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
#ifndef CEILING_POWER_OF_2_HPP_
#define CEILING_POWER_OF_2_HPP_
#include <cstdint>
namespace datasketches {
// compute the next highest power of 2 of 32-bit n
// taken from https://graphics.stanford.edu/~seander/bithacks.html
static inline uint32_t ceiling_power_of_2(uint32_t n) {
--n;
n |= n >> 1;
n |= n >> 2;
n |= n >> 4;
n |= n >> 8;
n |= n >> 16;
return ++n;
}
} /* namespace datasketches */
#endif // CEILING_POWER_OF_2_HPP_
Version data entries
19 entries across 19 versions & 1 rubygems