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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); } }