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| <?php | |
| namespace Money\Calculator; | |
| use Money\Calculator; | |
| use Money\Money; | |
| use Money\Number; | |
| /** | |
| * @author Frederik Bosch <f.bosch@genkgo.nl> | |
| */ | |
| final class BcMathCalculator implements Calculator | |
| { | |
| /** | |
| * @var string | |
| */ | |
| private $scale; | |
| /** | |
| * @param int $scale | |
| */ | |
| public function __construct($scale = 14) | |
| { | |
| $this->scale = $scale; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public static function supported() | |
| { | |
| return extension_loaded('bcmath'); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function compare($a, $b) | |
| { | |
| return bccomp($a, $b, $this->scale); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function add($amount, $addend) | |
| { | |
| return bcadd($amount, $addend, 0); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| * | |
| * @param $amount | |
| * @param $subtrahend | |
| * | |
| * @return string | |
| */ | |
| public function subtract($amount, $subtrahend) | |
| { | |
| return bcsub($amount, $subtrahend, 0); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function multiply($amount, $multiplier) | |
| { | |
| return bcmul($amount, $multiplier, $this->scale); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function divide($amount, $divisor) | |
| { | |
| return bcdiv($amount, $divisor, $this->scale); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function ceil($number) | |
| { | |
| $number = Number::fromString((string) $number); | |
| if ($number->isDecimal() === false) { | |
| return (string) $number; | |
| } | |
| if ($number->isNegative() === true) { | |
| return bcadd((string) $number, '0', 0); | |
| } | |
| return bcadd((string) $number, '1', 0); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function floor($number) | |
| { | |
| $number = Number::fromString((string) $number); | |
| if ($number->isDecimal() === false) { | |
| return (string) $number; | |
| } | |
| if ($number->isNegative() === true) { | |
| return bcadd((string) $number, '-1', 0); | |
| } | |
| return bcadd($number, '0', 0); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function absolute($number) | |
| { | |
| return ltrim($number, '-'); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function round($number, $roundingMode) | |
| { | |
| $number = Number::fromString((string) $number); | |
| if ($number->isDecimal() === false) { | |
| return (string) $number; | |
| } | |
| if ($number->isHalf() === false) { | |
| return $this->roundDigit($number); | |
| } | |
| if (Money::ROUND_HALF_UP === $roundingMode) { | |
| return bcadd( | |
| (string) $number, | |
| $number->getIntegerRoundingMultiplier(), | |
| 0 | |
| ); | |
| } | |
| if (Money::ROUND_HALF_DOWN === $roundingMode) { | |
| return bcadd((string) $number, '0', 0); | |
| } | |
| if (Money::ROUND_HALF_EVEN === $roundingMode) { | |
| if ($number->isCurrentEven() === true) { | |
| return bcadd((string) $number, '0', 0); | |
| } | |
| return bcadd( | |
| (string) $number, | |
| $number->getIntegerRoundingMultiplier(), | |
| 0 | |
| ); | |
| } | |
| if (Money::ROUND_HALF_ODD === $roundingMode) { | |
| if ($number->isCurrentEven() === true) { | |
| return bcadd( | |
| (string) $number, | |
| $number->getIntegerRoundingMultiplier(), | |
| 0 | |
| ); | |
| } | |
| return bcadd((string) $number, '0', 0); | |
| } | |
| if (Money::ROUND_HALF_POSITIVE_INFINITY === $roundingMode) { | |
| if ($number->isNegative() === true) { | |
| return bcadd((string) $number, '0', 0); | |
| } | |
| return bcadd( | |
| (string) $number, | |
| $number->getIntegerRoundingMultiplier(), | |
| 0 | |
| ); | |
| } | |
| if (Money::ROUND_HALF_NEGATIVE_INFINITY === $roundingMode) { | |
| if ($number->isNegative() === true) { | |
| return bcadd( | |
| (string) $number, | |
| $number->getIntegerRoundingMultiplier(), | |
| 0 | |
| ); | |
| } | |
| return bcadd( | |
| (string) $number, | |
| '0', | |
| 0 | |
| ); | |
| } | |
| throw new \InvalidArgumentException('Unknown rounding mode'); | |
| } | |
| /** | |
| * @param $number | |
| * | |
| * @return string | |
| */ | |
| private function roundDigit(Number $number) | |
| { | |
| if ($number->isCloserToNext()) { | |
| return bcadd( | |
| (string) $number, | |
| $number->getIntegerRoundingMultiplier(), | |
| 0 | |
| ); | |
| } | |
| return bcadd((string) $number, '0', 0); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function share($amount, $ratio, $total) | |
| { | |
| return $this->floor(bcdiv(bcmul($amount, $ratio, $this->scale), $total, $this->scale)); | |
| } | |
| } |