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<?php |
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/** |
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* Class Util |
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* |
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* @filesource Util.php |
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* @created 25.11.2015 |
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* @package chillerlan\QRCode |
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* @author Smiley <[email protected]> |
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* @copyright 2015 Smiley |
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* @license MIT |
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*/ |
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namespace chillerlan\QRCode; |
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/** |
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* |
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*/ |
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class Util{ |
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/** |
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* @param string $string |
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* |
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* @return bool |
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*/ |
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public static function isNumber(string $string):bool { |
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$len = strlen($string); |
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for($i = 0; $i < $len; $i++){ |
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$chr = ord($string[$i]); |
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if(!(ord('0') <= $chr && $chr <= ord('9'))){ |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* @param string $string |
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* |
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* @return bool |
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*/ |
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public static function isAlphaNum(string $string):bool { |
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$len = strlen($string); |
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for($i = 0; $i < $len; $i++){ |
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$chr = ord($string[$i]); |
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if( |
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!(ord('0') <= $chr && $chr <= ord('9')) |
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&& !(ord('A') <= $chr && $chr <= ord('Z')) |
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&& strpos(' $%*+-./:', $string[$i]) === false |
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){ |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* @param string $string |
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* |
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* @return bool |
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*/ |
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public static function isKanji(string $string):bool { |
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if(empty($string)){ |
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return false; |
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} |
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$i = 0; |
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$length = strlen($string); |
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while($i + 1 < $length){ |
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$c = ((0xff&ord($string[$i])) << 8)|(0xff&ord($string[$i + 1])); |
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if(!($c >= 0x8140 && $c <= 0x9FFC) && !($c >= 0xE040 && $c <= 0xEBBF)){ |
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return false; |
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} |
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$i += 2; |
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} |
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return !($i < $length); |
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} |
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/** |
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* @param int $data |
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* |
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* @return int |
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*/ |
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public static function getBCHTypeInfo(int $data):int { |
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return (($data << 10)|self::getBCHT($data, 10, QRConst::G15))^QRConst::G15_MASK; |
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} |
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/** |
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* @param int $data |
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* |
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* @return int |
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*/ |
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public static function getBCHTypeNumber(int $data):int{ |
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return ($data << 12)|self::getBCHT($data, 12, QRConst::G18); |
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} |
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/** |
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* @param int $data |
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* @param int $bits |
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* @param int $mask |
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* |
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* @return int |
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*/ |
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protected static function getBCHT(int $data, int $bits, int $mask):int { |
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$digit = $data << $bits; |
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while(self::getBCHDigit($digit) - self::getBCHDigit($mask) >= 0){ |
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$digit ^= ($mask << (self::getBCHDigit($digit) - self::getBCHDigit($mask))); |
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} |
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return $digit; |
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} |
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/** |
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* @param int $data |
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* |
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* @return int |
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*/ |
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public static function getBCHDigit(int $data):int { |
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$digit = 0; |
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while($data !== 0){ |
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$digit++; |
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$data >>= 1; |
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} |
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return $digit; |
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} |
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/** |
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* @param int $typeNumber |
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* @param int $errorCorrectLevel |
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* |
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* @return array |
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* @throws \chillerlan\QRCode\QRCodeException |
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*/ |
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public static function getRSBlocks(int $typeNumber, int $errorCorrectLevel):array { |
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if(!array_key_exists($errorCorrectLevel, QRConst::RSBLOCK)){ |
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throw new QRCodeException('$typeNumber: '.$typeNumber.' / $errorCorrectLevel: '.$errorCorrectLevel); |
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} |
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$rsBlock = QRConst::BLOCK_TABLE[($typeNumber - 1) * 4 + QRConst::RSBLOCK[$errorCorrectLevel]]; |
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$list = []; |
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$length = count($rsBlock) / 3; |
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for($i = 0; $i < $length; $i++){ |
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for($j = 0; $j < $rsBlock[$i * 3 + 0]; $j++){ |
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$list[] = [$rsBlock[$i * 3 + 1], $rsBlock[$i * 3 + 2]]; |
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} |
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} |
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return $list; |
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} |
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/** |
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* @param int $typeNumber |
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* @param int $mode |
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* @param int $errorCorrectLevel |
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* |
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* @return int |
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* @throws \chillerlan\QRCode\QRCodeException |
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*/ |
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public static function getMaxLength(int $typeNumber, int $mode, int $errorCorrectLevel):int { |
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if(!array_key_exists($errorCorrectLevel, QRConst::RSBLOCK)){ |
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throw new QRCodeException('Invalid error correct level: '.$errorCorrectLevel); |
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} |
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if(!array_key_exists($mode, QRConst::MODE)){ |
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throw new QRCodeException('Invalid mode: '.$mode); |
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} |
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return QRConst::MAX_LENGTH[$typeNumber - 1][QRConst::RSBLOCK[$errorCorrectLevel]][QRConst::MODE[$mode]]; |
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} |
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} |
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chillerlan /
php-qrcode
