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