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<?php |
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namespace CfdiUtils\Internals; |
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/** |
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* Converts any string of any base to any other base without |
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* PHP native method base_convert's double and float limitations. |
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* |
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* @see https://php.net/base_convert |
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* Original author: https://github.com/credomane/php_baseconvert |
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* |
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* NOTE: Changes will not be considering a bracking compatibility change since this utility is for internal usage only |
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* @internal |
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*/ |
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class BaseConverter |
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{ |
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/** @var BaseConverterSequence */ |
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private $sequence; |
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public function __construct(BaseConverterSequence $sequence) |
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{ |
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$this->sequence = $sequence; |
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} |
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public static function createBase36(): self |
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{ |
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return new self(new BaseConverterSequence('0123456789abcdefghijklmnopqrstuvwxyz')); |
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} |
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public function sequence(): BaseConverterSequence |
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{ |
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return $this->sequence; |
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} |
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public function maximumBase(): int |
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{ |
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return $this->sequence->length(); |
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} |
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public function convert(string $input, int $frombase, int $tobase): string |
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{ |
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if ($frombase < 2 || $frombase > $this->maximumBase()) { |
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throw new \UnexpectedValueException('Invalid from base'); |
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} |
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if ($tobase < 2 || $tobase > $this->maximumBase()) { |
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throw new \UnexpectedValueException('Invalid to base'); |
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} |
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$originalSequence = $this->sequence()->value(); |
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if ('' === $input) { |
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$input = $originalSequence{0}; // use zero as input |
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} |
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$chars = substr($originalSequence, 0, $frombase); |
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if (! boolval(preg_match("/^[$chars]+$/", $input))) { |
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throw new \UnexpectedValueException('The number to convert contains invalid characters'); |
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} |
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$length = strlen($input); |
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$values = []; |
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for ($i = 0; $i < $length; $i++) { |
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$values[] = intval(stripos($originalSequence, $input{$i})); |
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} |
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$result = ''; |
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do { |
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$divide = 0; |
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$newlen = 0; |
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for ($i = 0; $i < $length; $i++) { |
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$divide = $divide * $frombase + $values[$i]; |
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if ($divide >= $tobase) { |
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$values[$newlen] = intval($divide / $tobase); |
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$divide = $divide % $tobase; |
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$newlen = $newlen + 1; |
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} elseif ($newlen > 0) { |
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$values[$newlen] = 0; |
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$newlen = $newlen + 1; |
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} |
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} |
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$length = $newlen; |
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$result = $originalSequence{$divide} . $result; |
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} while ($newlen > 0); |
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return $result; |
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} |
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} |
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eclipxe13 /
CfdiUtils
