* @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; } }