is_pow2.h

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/*  is_pow2.h
 *
 *  Copyright (C) 2023 abxh
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *  See the file LICENSE included with this distribution for more
 *  information. */
 
#pragma once
 
#include <stdlib.h>
 
#define IS_POW2(X) ((X) != 0 && ((X) & ((X) - 1)) == 0)
 
static inline size_t is_pow2(const size_t x)
{
    return x != 0 && (x & (x - 1)) == 0;
}
 
// vim: ft=c