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<?php
declare(strict_types=1);
namespace Brick\Math\Internal\Calculator;
use Brick\Math\Internal\Calculator;
/**
* Calculator implementation built around the bcmath library.
*
* @internal
*
* @psalm-immutable
*/
class BcMathCalculator extends Calculator
{
/**
* {@inheritdoc}
*/
public function add(string $a, string $b) : string
{
return \bcadd($a, $b, 0);
}
/**
* {@inheritdoc}
*/
public function sub(string $a, string $b) : string
{
return \bcsub($a, $b, 0);
}
/**
* {@inheritdoc}
*/
public function mul(string $a, string $b) : string
{
return \bcmul($a, $b, 0);
}
/**
* {@inheritdoc}
*
* @psalm-suppress InvalidNullableReturnType
* @psalm-suppress NullableReturnStatement
*/
public function divQ(string $a, string $b) : string
{
return \bcdiv($a, $b, 0);
}
/**
* {@inheritdoc}
*
* @psalm-suppress InvalidNullableReturnType
* @psalm-suppress NullableReturnStatement
*/
public function divR(string $a, string $b) : string
{
if (version_compare(PHP_VERSION, '7.2') >= 0) {
return \bcmod($a, $b, 0);
}
return \bcmod($a, $b);
}
/**
* {@inheritdoc}
*/
public function divQR(string $a, string $b) : array
{
$q = \bcdiv($a, $b, 0);
if (version_compare(PHP_VERSION, '7.2') >= 0) {
$r = \bcmod($a, $b, 0);
} else {
$r = \bcmod($a, $b);
}
assert($q !== null);
assert($r !== null);
return [$q, $r];
}
/**
* {@inheritdoc}
*/
public function pow(string $a, int $e) : string
{
return \bcpow($a, (string) $e, 0);
}
/**
* {@inheritdoc}
*
* @psalm-suppress InvalidNullableReturnType
* @psalm-suppress NullableReturnStatement
*/
public function modPow(string $base, string $exp, string $mod) : string
{
return \bcpowmod($base, $exp, $mod, 0);
}
/**
* {@inheritDoc}
*
* @psalm-suppress NullableReturnStatement
* @psalm-suppress InvalidNullableReturnType
*/
public function sqrt(string $n) : string
{
return \bcsqrt($n, 0);
}
}
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