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<?php
/**
* Class AlphaNum
*
* @filesource AlphaNum.php
* @created 25.11.2015
* @package chillerlan\QRCode\Data
* @author Smiley <smiley@chillerlan.net>
* @copyright 2015 Smiley
* @license MIT
*/
namespace chillerlan\QRCode\Data;
use chillerlan\QRCode\QRCode;
use function ord, sprintf;
/**
* Alphanumeric mode: 0 to 9, A to Z, space, $ % * + - . / :
*
* ISO/IEC 18004:2000 Section 8.3.3
* ISO/IEC 18004:2000 Section 8.4.3
*/
final class AlphaNum extends QRDataAbstract{
protected int $datamode = QRCode::DATA_ALPHANUM;
protected array $lengthBits = [9, 11, 13];
/**
* @inheritdoc
*/
protected function write(string $data):void{
for($i = 0; $i + 1 < $this->strlen; $i += 2){
$this->bitBuffer->put($this->getCharCode($data[$i]) * 45 + $this->getCharCode($data[$i + 1]), 11);
}
if($i < $this->strlen){
$this->bitBuffer->put($this->getCharCode($data[$i]), 6);
}
}
/**
* get the code for the given character
*
* @throws \chillerlan\QRCode\Data\QRCodeDataException on an illegal character occurence
*/
protected function getCharCode(string $chr):int{
if(!isset($this::CHAR_MAP_ALPHANUM[$chr])){
throw new QRCodeDataException(sprintf('illegal char: "%s" [%d]', $chr, ord($chr)));
}
return $this::CHAR_MAP_ALPHANUM[$chr];
}
}
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