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<?php |
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namespace ICanBoogie\CLDR\Numbers; |
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use function assert; |
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use function is_numeric; |
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use function is_string; |
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use function preg_match; |
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use function str_repeat; |
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use function strlen; |
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use function strpos; |
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use function strrpos; |
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use function substr; |
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final class Number |
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{ |
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/** |
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* Returns the precision of a number. |
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* |
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* @param float|int|numeric-string $number |
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*/ |
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public static function precision_from(float|int|string $number): int |
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{ |
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$number = (string)$number; |
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$pos = strrpos($number, '.'); |
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if (!$pos) { |
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return 0; |
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} |
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return strlen($number) - $pos - 1; |
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} |
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/** |
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* Returns a number rounded to the specified precision. |
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* |
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* @param float|int|numeric-string $number |
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*/ |
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public static function round_to(float|int|string $number, int $precision): float |
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{ |
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return round($number + 0, $precision); |
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} |
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/** |
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* Parses a number. |
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* |
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* @param float|int|numeric-string $number |
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* |
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* @return array{ 0: int, 1: string|null} |
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* Where `0` is the integer part and `1` the fractional part. The fractional part is `null` if |
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* `$number` has no decimal separator. The fractional part is returned as a string to preserve '03' from |
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* '1.03'. |
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*/ |
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public static function parse(float|int|string $number, int $precision = null): array |
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{ |
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if ($precision === null) { |
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$precision = self::precision_from($number); |
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} |
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$number = self::round_to($number + 0, $precision); |
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$number = abs($number); |
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$number = number_format($number, $precision, '.', ''); |
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[ $integer, $fractional ] = explode('.', (string)$number) + [ 1 => null ]; |
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return [ (int)$integer, $fractional ]; |
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} |
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/** |
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* @param float|int|numeric-string $number |
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* |
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* @return float|int|numeric-string |
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*/ |
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public static function expand_compact_decimal_exponent(float|int|string $number, int &$c = 0): float|int|string |
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{ |
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$c = 0; |
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if (!is_string($number)) { |
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return $number; |
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} |
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$c_pos = strpos($number, 'c'); |
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if ($c_pos === false) { |
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return $number; |
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} |
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$c = (int)substr($number, $c_pos + 1); |
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$number = substr($number, 0, $c_pos); |
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preg_match('/0+$/', $number, $match); |
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assert(is_numeric($number)); |
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$multiplier = (int)('1' . str_repeat('0', $c)); |
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$number *= $multiplier; |
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if ($match) { |
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return $number . $match[0]; // @phpstan-ignore-line |
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} |
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return $number; |
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} |
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} |
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ICanBoogie /
CLDR
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