* * PHP QR Code is distributed under LGPL 3 * Copyright (C) 2010 Dominik Dzienia * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 3 of the License, or any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ namespace PHPQRCode; use Exception; class QRinput { public $items; private $version; private $level; //---------------------------------------------------------------------- public function __construct($version = 0, $level = Constants::QR_ECLEVEL_L) { if ($version < 0 || $version > Constants::QRSPEC_VERSION_MAX || $level > Constants::QR_ECLEVEL_H) { throw new Exception('Invalid version no'); return NULL; } $this->version = $version; $this->level = $level; } //---------------------------------------------------------------------- public function getVersion() { return $this->version; } //---------------------------------------------------------------------- public function setVersion($version) { if($version < 0 || $version > Constants::QRSPEC_VERSION_MAX) { throw new Exception('Invalid version no'); return -1; } $this->version = $version; return 0; } //---------------------------------------------------------------------- public function getErrorCorrectionLevel() { return $this->level; } //---------------------------------------------------------------------- public function setErrorCorrectionLevel($level) { if($level > Constants::QR_ECLEVEL_H) { throw new Exception('Invalid ECLEVEL'); return -1; } $this->level = $level; return 0; } //---------------------------------------------------------------------- public function appendEntry(QRinputItem $entry) { $this->items[] = $entry; } //---------------------------------------------------------------------- public function append($mode, $size, $data) { try { $entry = new QRinputItem($mode, $size, $data); $this->items[] = $entry; return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function insertStructuredAppendHeader($size, $index, $parity) { if( $size > Constants::MAX_STRUCTURED_SYMBOLS ) { throw new Exception('insertStructuredAppendHeader wrong size'); } if( $index <= 0 || $index > Constants::MAX_STRUCTURED_SYMBOLS ) { throw new Exception('insertStructuredAppendHeader wrong index'); } $buf = array($size, $index, $parity); try { $entry = new QRinputItem(Constants::QR_MODE_STRUCTURE, 3, buf); array_unshift($this->items, $entry); return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function calcParity() { $parity = 0; foreach($this->items as $item) { if($item->mode != Constants::QR_MODE_STRUCTURE) { for($i=$item->size-1; $i>=0; $i--) { $parity ^= $item->data[$i]; } } } return $parity; } //---------------------------------------------------------------------- public static function checkModeNum($size, $data) { for($i=0; $i<$size; $i++) { if((ord($data[$i]) < ord('0')) || (ord($data[$i]) > ord('9'))){ return false; } } return true; } //---------------------------------------------------------------------- public static function estimateBitsModeNum($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; } //---------------------------------------------------------------------- public static $anTable = array( -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 ); //---------------------------------------------------------------------- public static function lookAnTable($c) { return (($c > 127)?-1:self::$anTable[$c]); } //---------------------------------------------------------------------- public static function checkModeAn($size, $data) { for($i=0; $i<$size; $i++) { if (self::lookAnTable(ord($data[$i])) == -1) { return false; } } return true; } //---------------------------------------------------------------------- public static function estimateBitsModeAn($size) { $w = (int)($size / 2); $bits = $w * 11; if($size & 1) { $bits += 6; } return $bits; } //---------------------------------------------------------------------- public static function estimateBitsMode8($size) { return $size * 8; } //---------------------------------------------------------------------- public function estimateBitsModeKanji($size) { return (int)(($size / 2) * 13); } //---------------------------------------------------------------------- public static function checkModeKanji($size, $data) { if($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) || $val > 0xebbf) { return false; } } return true; } /*********************************************************************** * Validation **********************************************************************/ public static function check($mode, $size, $data) { if($size <= 0) return false; switch($mode) { case Constants::QR_MODE_NUM: return self::checkModeNum($size, $data); break; case Constants::QR_MODE_AN: return self::checkModeAn($size, $data); break; case Constants::QR_MODE_KANJI: return self::checkModeKanji($size, $data); break; case Constants::QR_MODE_8: return true; break; case Constants::QR_MODE_STRUCTURE: return true; break; default: break; } return false; } //---------------------------------------------------------------------- public function estimateBitStreamSize($version) { $bits = 0; foreach($this->items as $item) { $bits += $item->estimateBitStreamSizeOfEntry($version); } return $bits; } //---------------------------------------------------------------------- public function estimateVersion() { $version = 0; $prev = 0; do { $prev = $version; $bits = $this->estimateBitStreamSize($prev); $version = QRspec::getMinimumVersion((int)(($bits + 7) / 8), $this->level); if ($version < 0) { return -1; } } while ($version > $prev); return $version; } //---------------------------------------------------------------------- public static function lengthOfCode($mode, $version, $bits) { $payload = $bits - 4 - QRspec::lengthIndicator($mode, $version); switch($mode) { case Constants::QR_MODE_NUM: $chunks = (int)($payload / 10); $remain = $payload - $chunks * 10; $size = $chunks * 3; if($remain >= 7) { $size += 2; } else if($remain >= 4) { $size += 1; } break; case Constants::QR_MODE_AN: $chunks = (int)($payload / 11); $remain = $payload - $chunks * 11; $size = $chunks * 2; if($remain >= 6) $size++; break; case Constants::QR_MODE_8: $size = (int)($payload / 8); break; case Constants::QR_MODE_KANJI: $size = (int)(($payload / 13) * 2); break; case Constants::QR_MODE_STRUCTURE: $size = (int)($payload / 8); break; default: $size = 0; break; } $maxsize = QRspec::maximumWords($mode, $version); if($size < 0) $size = 0; if($size > $maxsize) $size = $maxsize; return $size; } //---------------------------------------------------------------------- public function createBitStream() { $total = 0; foreach($this->items as $item) { $bits = $item->encodeBitStream($this->version); if($bits < 0) return -1; $total += $bits; } return $total; } //---------------------------------------------------------------------- public function convertData() { $ver = $this->estimateVersion(); if($ver > $this->getVersion()) { $this->setVersion($ver); } for(;;) { $bits = $this->createBitStream(); if($bits < 0) return -1; $ver = QRspec::getMinimumVersion((int)(($bits + 7) / 8), $this->level); if($ver < 0) { throw new Exception('WRONG VERSION'); return -1; } else if($ver > $this->getVersion()) { $this->setVersion($ver); } else { break; } } return 0; } //---------------------------------------------------------------------- public function appendPaddingBit(&$bstream) { $bits = $bstream->size(); $maxwords = QRspec::getDataLength($this->version, $this->level); $maxbits = $maxwords * 8; if ($maxbits == $bits) { return 0; } if ($maxbits - $bits < 5) { return $bstream->appendNum($maxbits - $bits, 0); } $bits += 4; $words = (int)(($bits + 7) / 8); $padding = new QRbitstream(); $ret = $padding->appendNum($words * 8 - $bits + 4, 0); if($ret < 0) return $ret; $padlen = $maxwords - $words; if($padlen > 0) { $padbuf = array(); for($i=0; $i<$padlen; $i++) { $padbuf[$i] = ($i&1)?0x11:0xec; } $ret = $padding->appendBytes($padlen, $padbuf); if($ret < 0) return $ret; } $ret = $bstream->append($padding); return $ret; } //---------------------------------------------------------------------- public function mergeBitStream() { if($this->convertData() < 0) { return null; } $bstream = new QRbitstream(); foreach($this->items as $item) { $ret = $bstream->append($item->bstream); if($ret < 0) { return null; } } return $bstream; } //---------------------------------------------------------------------- public function getBitStream() { $bstream = $this->mergeBitStream(); if($bstream == null) { return null; } $ret = $this->appendPaddingBit($bstream); if($ret < 0) { return null; } return $bstream; } //---------------------------------------------------------------------- public function getByteStream() { $bstream = $this->getBitStream(); if($bstream == null) { return null; } return $bstream->toByte(); } }