* * QR Code Generator for PHP is distributed under MIT * Copyright (C) 2018 Bruno Vaula Werneck * * @package QR_Code\Encoder */ class Input { public $items; private $version; private $level; /** * Input constructor. * @param int $version * @param int|string $level * @throws \Exception */ public function __construct (int $version = 0, $level = QR_ECLEVEL_L) { if ($version < 0 || $version > QRSPEC_VERSION_MAX || $level > QR_ECLEVEL_H) { throw new \Exception('Invalid version no'); } $this->version = $version; $this->level = $level; } /** * @return int */ public function getVersion () : int { return $this->version; } /** * @param int $version * @return int * @throws \Exception */ public function setVersion (int $version) : int { if ($version < 0 || $version > QRSPEC_VERSION_MAX) { throw new \Exception('Invalid version no'); } $this->version = $version; return 0; } /** * @return int */ public function getErrorCorrectionLevel () : int { return $this->level; } /** * @param $level * @return int * @throws \Exception */ public function setErrorCorrectionLevel ($level) : int { if ($level > QR_ECLEVEL_H) { throw new \Exception('Invalid ECLEVEL'); } $this->level = $level; return 0; } /** * @param \QR_Code\Encoder\InputItem $entry */ public function appendEntry (InputItem $entry) : void { $this->items[] = $entry; } /** * @param $mode * @param $size * @param $data * @return int */ public function append ($mode, $size, $data) : int { try { $entry = new InputItem($mode, $size, $data); $this->items[] = $entry; return 0; } catch (\Exception $e) { return -1; } } /** * @param int $size * @param int $index * @param array $parity * @return int * @throws \Exception */ public function insertStructuredAppendHeader (int $size, int $index, array $parity) : int { if ($size > MAX_STRUCTURED_SYMBOLS) { throw new \Exception('insertStructuredAppendHeader wrong size'); } if ($index <= 0 || $index > MAX_STRUCTURED_SYMBOLS) { throw new \Exception('insertStructuredAppendHeader wrong index'); } $buf = [$size, $index, $parity]; try { $entry = new InputItem(QR_MODE_STRUCTURE, 3, $buf); array_unshift($this->items, $entry); return 0; } catch (\Exception $e) { return -1; } } /** * @return int */ public function calcParity () : int { $parity = 0; foreach ($this->items as $item) { if ($item->mode != QR_MODE_STRUCTURE) { for ($i = $item->size - 1; $i >= 0; $i--) { $parity ^= $item->data[$i]; } } } return $parity; } /** * @param int $size * @param mixed $data * @return bool */ public static function checkModeNum (int $size, $data) : bool { for ($i = 0; $i < $size; $i++) { if ((ord($data[$i]) < ord('0')) || (ord($data[$i]) > ord('9'))) { return false; } } return true; } /** * @param int $size * @return float|int */ public static function estimateBitsModeNum (int $size) { $w = (int) $size / 3; $bits = $w * 10; switch ($size - $w * 3) { case 1: $bits += 4; break; case 2: $bits += 7; break; default: break; } return $bits; } /** * @var array */ public static $anTable = [ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, ]; /** * @param int $c * @return int|mixed */ public static function lookAnTable (int $c) { return (($c > 127) ? -1 : self::$anTable[$c]); } /** * @param int $size * @param mixed $data * @return bool */ public static function checkModeAn (int $size, $data) : bool { for ($i = 0; $i < $size; $i++) { if (self::lookAnTable(ord($data[$i])) == -1) { return false; } } return true; } /** * @param int $size * @return float|int */ public static function estimateBitsModeAn (int $size) { $w = (int) ($size / 2); $bits = $w * 11; if ($size & 1) { $bits += 6; } return $bits; } /** * @param int $size * @return float|int */ public static function estimateBitsMode8 (int $size) { return $size * 8; } /** * @param int $size * @return int */ public static function estimateBitsModeKanji (int $size) : int { return (int) (($size / 2) * 13); } /** * @param int $size * @param mixed $data * @return bool */ public static function checkModeKanji (int $size, $data) : bool { if ($size & 1) return false; for ($i = 0; $i < $size; $i += 2) { $val = (ord($data[$i]) << 8) | ord($data[$i + 1]); if ($val < 0x8140 || ($val > 0x9ffc && $val < 0xe040) || $val > 0xebbf) { return false; } } return true; } /** * Validation * * @param int $mode * @param int $size * @param mixed $data * @return bool */ public static function check (int $mode, int $size, $data) : bool { if ($size <= 0) return false; switch ($mode) { case QR_MODE_NUM: return self::checkModeNum($size, $data); break; case QR_MODE_AN: return self::checkModeAn($size, $data); break; case QR_MODE_KANJI: return self::checkModeKanji($size, $data); break; case QR_MODE_8: return true; break; case QR_MODE_STRUCTURE: return true; break; default: break; } return false; } /** * @param int $version * @return float|int */ public function estimateBitStreamSize (int $version) { $bits = 0; /** * @var $item \QR_Code\Encoder\InputItem */ foreach ($this->items as $item) { $bits += $item->estimateBitStreamSizeOfEntry($version); } return $bits; } /** * @return int */ public function estimateVersion () : int { $version = 0; do { $prev = $version; $bits = $this->estimateBitStreamSize($prev); $version = Specifications::getMinimumVersion((int) (($bits + 7) / 8), $this->level); if ($version < 0) { return -1; } } while ($version > $prev); return $version; } /** * @param int $mode * @param int $version * @param $bits * @return float|int */ public static function lengthOfCode (int $mode, int $version, $bits) { $payload = $bits - 4 - Specifications::lengthIndicator($mode, $version); switch ($mode) { case QR_MODE_NUM: $chunks = (int) ($payload / 10); $remain = $payload - $chunks * 10; $size = $chunks * 3; if ($remain >= 7) { $size += 2; } elseif ($remain >= 4) { $size += 1; } break; case QR_MODE_AN: $chunks = (int) ($payload / 11); $remain = $payload - $chunks * 11; $size = $chunks * 2; if ($remain >= 6) $size++; break; case QR_MODE_8: $size = (int) ($payload / 8); break; case QR_MODE_KANJI: $size = (int) (($payload / 13) * 2); break; case QR_MODE_STRUCTURE: $size = (int) ($payload / 8); break; default: $size = 0; break; } $maxsize = Specifications::maximumWords($mode, $version); if ($size < 0) $size = 0; if ($size > $maxsize) $size = $maxsize; return $size; } /** * @return int */ public function createBitStream () : int { $total = 0; /** * @var $item \QR_Code\Encoder\InputItem */ foreach ($this->items as $item) { $bits = $item->encodeBitStream($this->version); if ($bits < 0) return -1; $total += $bits; } return $total; } /** * @return int * @throws \Exception */ public function convertData () : int { $ver = $this->estimateVersion(); if ($ver > $this->getVersion()) { $this->setVersion($ver); } for (; ;) { $bits = $this->createBitStream(); if ($bits < 0) return -1; $ver = Specifications::getMinimumVersion((int) (($bits + 7) / 8), $this->level); if ($ver < 0) { throw new \Exception('WRONG VERSION'); } elseif ($ver > $this->getVersion()) { $this->setVersion($ver); } else { break; } } return 0; } /** * @param \QR_Code\Encoder\BitStream $bitStream * @return int */ public function appendPaddingBit (BitStream &$bitStream) : int { $bits = $bitStream->size(); $maxwords = Specifications::getDataLength($this->version, $this->level); $maxbits = $maxwords * 8; if ($maxbits == $bits) { return 0; } if ($maxbits - $bits < 5) { return $bitStream->appendNum($maxbits - $bits, 0); } $bits += 4; $words = (int) (($bits + 7) / 8); $padding = new BitStream(); $ret = $padding->appendNum($words * 8 - $bits + 4, 0); if ($ret < 0) return $ret; $padlen = $maxwords - $words; if ($padlen > 0) { $padbuf = []; for ($i = 0; $i < $padlen; $i++) { $padbuf[$i] = ($i & 1) ? 0x11 : 0xec; } $ret = $padding->appendBytes($padlen, $padbuf); if ($ret < 0) return $ret; } $ret = $bitStream->append($padding); return $ret; } /** * @return null|\QR_Code\Encoder\BitStream * @throws \Exception */ public function mergeBitStream () { if ($this->convertData() < 0) { return null; } $bitStream = new BitStream(); foreach ($this->items as $item) { $ret = $bitStream->append($item->bitStream); if ($ret < 0) { return null; } } return $bitStream; } /** * @return null|\QR_Code\Encoder\BitStream * @throws \Exception */ public function getBitStream () { $bitStream = $this->mergeBitStream(); if ($bitStream == null) { return null; } $ret = $this->appendPaddingBit($bitStream); if ($ret < 0) { return null; } return $bitStream; } /** * @return array * @throws \Exception */ public function getByteStream () : array { $bitStream = $this->getBitStream(); if ($bitStream == null) { return []; } return $bitStream->toByte(); } }