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 * Copyright (C) 2011-2021 Intel Corporation. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *   * Redistributions in binary form must reproduce the above copyright
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 *     the documentation and/or other materials provided with the
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 */
#pragma once

#ifndef _POWERS_OF_TWO_H__
#define _POWERS_OF_TWO_H__

#include <stdint.h>

static bool is_power_of_two(uint64_t x)
{
    return ((x != 0) && !(x & (x - 1)));
}

// The not fastest way to calculate the number of powers of two between [low, high]
static uint32_t count_powers_of_two(uint64_t low, uint64_t high)
{
    
    uint32_t num = 0;
    for (uint64_t i = low; i <= high; i++)
    {
        if (is_power_of_two(i))
            num++;
    }
    return num;
}

#endif /* !_POWERS_OF_TWO_H__ */