mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-21 23:20:20 +00:00
36 lines
586 B
C
36 lines
586 B
C
|
/*
|
||
|
|
* Copyright (c) 2022, Leon Albrecht <leon2002.la@gmail.com>
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <AK/Concepts.h>
|
||
|
|
#include <AK/Types.h>
|
||
|
|
|
||
|
|
#include <AK/Format.h>
|
||
|
|
|
||
|
|
namespace AK {
|
||
|
|
|
||
|
|
template<Integral I>
|
||
|
|
constexpr I pow(I base, I exponent)
|
||
|
|
{
|
||
|
|
// https://en.wikipedia.org/wiki/Exponentiation_by_squaring
|
||
|
|
if (exponent < 0)
|
||
|
|
return 0;
|
||
|
|
if (exponent == 0)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
I res = 1;
|
||
|
|
while (exponent > 0) {
|
||
|
|
if (exponent & 1)
|
||
|
|
res *= base;
|
||
|
|
base *= base;
|
||
|
|
exponent /= 2u;
|
||
|
|
}
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|