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<?php
declare(strict_types=1);
namespace Money;
use Money\Exception\InvalidArgumentException;
/**
* Money calculations abstracted away from the Money value object.
*
* @internal the calculator component is an internal detail of this library: it is only supposed to be replaced if
* your system requires a custom architecture for operating on large numbers.
*/
interface Calculator
{
/**
* Compare a to b.
*
* Retrieves a negative value if $a < $b.
* Retrieves a positive value if $a > $b.
* Retrieves zero if $a == $b
*
* @psalm-param numeric-string $a
* @psalm-param numeric-string $b
*
* @psalm-pure
*/
public static function compare(string $a, string $b): int;
/**
* Add added to amount.
*
* @psalm-param numeric-string $amount
* @psalm-param numeric-string $addend
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function add(string $amount, string $addend): string;
/**
* Subtract subtrahend from amount.
*
* @psalm-param numeric-string $amount
* @psalm-param numeric-string $subtrahend
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function subtract(string $amount, string $subtrahend): string;
/**
* Multiply amount with multiplier.
*
* @psalm-param numeric-string $amount
* @psalm-param numeric-string $multiplier
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function multiply(string $amount, string $multiplier): string;
/**
* Divide amount with divisor.
*
* @psalm-param numeric-string $amount
* @psalm-param numeric-string $divisor
*
* @psalm-return numeric-string
*
* @throws InvalidArgumentException when $divisor is zero.
*
* @psalm-pure
*/
public static function divide(string $amount, string $divisor): string;
/**
* Round number to following integer.
*
* @psalm-param numeric-string $number
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function ceil(string $number): string;
/**
* Round number to preceding integer.
*
* @psalm-param numeric-string $number
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function floor(string $number): string;
/**
* Returns the absolute value of the number.
*
* @psalm-param numeric-string $number
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function absolute(string $number): string;
/**
* Round number, use rounding mode for tie-breaker.
*
* @psalm-param numeric-string $number
* @psalm-param Money::ROUND_* $roundingMode
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function round(string $number, int $roundingMode): string;
/**
* Share amount among ratio / total portions.
*
* @psalm-param numeric-string $amount
* @psalm-param numeric-string $ratio
* @psalm-param numeric-string $total
*
* @psalm-return numeric-string
*
* @psalm-pure
*/
public static function share(string $amount, string $ratio, string $total): string;
/**
* Get the modulus of an amount.
*
* @psalm-param numeric-string $amount
* @psalm-param numeric-string $divisor
*
* @psalm-return numeric-string
*
* @throws InvalidArgumentException when $divisor is zero.
*
* @psalm-pure
*/
public static function mod(string $amount, string $divisor): string;
}