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<?php
/**
* Class Number
*
* @filesource Number.php
* @created 26.11.2015
* @package QRCode
* @author Smiley <[email protected]>
* @copyright 2015 Smiley
* @license MIT
*/
namespace chillerlan\QRCode\Data;
use chillerlan\QRCode\QRCode;
use function ord, sprintf, substr;
/**
* Numeric mode: decimal digits 0 through 9
*/
class Number extends QRDataAbstract{
/**
* @inheritdoc
*/
protected $datamode = QRCode::DATA_NUMBER;
/**
* @inheritdoc
*/
protected $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);
}
}
}
/**
* @param string $string
*
* @return int
* @throws \chillerlan\QRCode\Data\QRCodeDataException
*/
protected function parseInt(string $string):int{
$num = 0;
$len = strlen($string);
for($i = 0; $i < $len; $i++){
$c = ord($string[$i]);
if(!in_array($string[$i], $this::NUMBER_CHAR_MAP, true)){
throw new QRCodeDataException(sprintf('illegal char: "%s" [%d]', $string[$i], $c));
}
$c = $c - 48; // ord('0')
$num = $num * 10 + $c;
}
return $num;
}
}
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