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<?php
/**
* Class Kanji
*
* @filesource Kanji.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 mb_strlen, ord, sprintf, strlen;
/**
* Kanji mode: double-byte characters from the Shift JIS character set
*
* ISO/IEC 18004:2000 Section 8.3.5
* ISO/IEC 18004:2000 Section 8.4.5
*/
final class Kanji extends QRDataAbstract{
protected int $datamode = QRCode::DATA_KANJI;
protected array $lengthBits = [8, 10, 12];
/**
* @inheritdoc
*/
protected function getLength(string $data):int{
return mb_strlen($data, 'SJIS');
}
/**
* @inheritdoc
*
* @throws \chillerlan\QRCode\Data\QRCodeDataException on an illegal character occurence
*/
protected function write(string $data):void{
$len = strlen($data);
for($i = 0; $i + 1 < $len; $i += 2){
$c = ((0xff & ord($data[$i])) << 8) | (0xff & ord($data[$i + 1]));
if($c >= 0x8140 && $c <= 0x9FFC){
$c -= 0x8140;
}
elseif($c >= 0xE040 && $c <= 0xEBBF){
$c -= 0xC140;
}
else{
throw new QRCodeDataException(sprintf('illegal char at %d [%d]', $i + 1, $c));
}
$this->bitBuffer->put(((($c >> 8) & 0xff) * 0xC0) + ($c & 0xff), 13);
}
if($i < $len){
throw new QRCodeDataException(sprintf('illegal char at %d', $i + 1));
}
}
}
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