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<?php
/**
* Class Byte
*
* @created 25.11.2015
* @author Smiley <smiley@chillerlan.net>
* @copyright 2015 Smiley
* @license MIT
*/
namespace chillerlan\QRCode\Data;
use chillerlan\QRCode\Common\{BitBuffer, Mode};
use function chr, ord;
/**
* 8-bit Byte mode, ISO-8859-1 or UTF-8
*
* ISO/IEC 18004:2000 Section 8.3.4
* ISO/IEC 18004:2000 Section 8.4.4
*/
final class Byte extends QRDataModeAbstract{
/**
* @inheritDoc
*/
public const DATAMODE = Mode::BYTE;
/**
* @inheritDoc
*/
public function getLengthInBits():int{
return ($this->getCharCount() * 8);
}
/**
* @inheritDoc
*/
public static function validateString(string $string):bool{
return $string !== '';
}
/**
* @inheritDoc
*/
public function write(BitBuffer $bitBuffer, int $versionNumber):QRDataModeInterface{
$len = $this->getCharCount();
$bitBuffer
->put(self::DATAMODE, 4)
->put($len, $this::getLengthBits($versionNumber))
;
$i = 0;
while($i < $len){
$bitBuffer->put(ord($this->data[$i]), 8);
$i++;
}
return $this;
}
/**
* @inheritDoc
*
* @throws \chillerlan\QRCode\Data\QRCodeDataException
*/
public static function decodeSegment(BitBuffer $bitBuffer, int $versionNumber):string{
$length = $bitBuffer->read(self::getLengthBits($versionNumber));
if($bitBuffer->available() < (8 * $length)){
throw new QRCodeDataException('not enough bits available'); // @codeCoverageIgnore
}
$readBytes = '';
for($i = 0; $i < $length; $i++){
$readBytes .= chr($bitBuffer->read(8));
}
return $readBytes;
}
}
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