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<?php
/**
* Class Number
*
* @filesource Number.php
* @created 26.11.2015
* @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, str_split, substr;
/**
* Numeric mode: decimal digits 0 to 9
*
* ISO/IEC 18004:2000 Section 8.3.2
* ISO/IEC 18004:2000 Section 8.4.2
*/
final class Number extends QRDataAbstract{
protected int $datamode = QRCode::DATA_NUMBER;
protected array $lengthBits = [10, 12, 14];
/**
* @inheritdoc
*/
protected function write(string $data):void{
$i = 0;
while($i + 2 < $this->strlen){
$this->bitBuffer->put($this->parseInt(substr($data, $i, 3)), 10);
$i += 3;
}
if($i < $this->strlen){
if($this->strlen - $i === 1){
$this->bitBuffer->put($this->parseInt(substr($data, $i, $i + 1)), 4);
}
elseif($this->strlen - $i === 2){
$this->bitBuffer->put($this->parseInt(substr($data, $i, $i + 2)), 7);
}
}
}
/**
* get the code for the given numeric string
*
* @throws \chillerlan\QRCode\Data\QRCodeDataException on an illegal character occurence
*/
protected function parseInt(string $string):int{
$num = 0;
foreach(str_split($string) as $chr){
$c = ord($chr);
if(!isset($this::CHAR_MAP_NUMBER[$chr])){
throw new QRCodeDataException(sprintf('illegal char: "%s" [%d]', $chr, $c));
}
$c = $c - 48; // ord('0')
$num = $num * 10 + $c;
}
return $num;
}
}
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