查看文件: qrinput.php
大小: 24.22 KB
类型: application/octet-stream
<?php /* * PHP QR Code encoder * * Input encoding class * * Based on libqrencode C library distributed under LGPL 2.1 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net> * * PHP QR Code is distributed under LGPL 3 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm> * * 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 */ define('STRUCTURE_HEADER_BITS', 20); define('MAX_STRUCTURED_SYMBOLS', 16); class QRinputItem { public $mode; public $size; public $data; public $bstream; public function __construct($mode, $size, $data, $bstream = null) { $setData = array_slice($data, 0, $size); if (count($setData) < $size) { $setData = array_merge($setData, array_fill(0,$size-count($setData),0)); } if(!QRinput::check($mode, $size, $setData)) { throw new Exception('Error m:'.$mode.',s:'.$size.',d:'.join(',',$setData)); return null; } $this->mode = $mode; $this->size = $size; $this->data = $setData; $this->bstream = $bstream; } //---------------------------------------------------------------------- public function encodeModeNum($version) { try { $words = (int)($this->size / 3); $bs = new QRbitstream(); $val = 0x1; $bs->appendNum(4, $val); $bs->appendNum(QRspec::lengthIndicator(QR_MODE_NUM, $version), $this->size); for($i=0; $i<$words; $i++) { $val = (ord($this->data[$i*3 ]) - ord('0')) * 100; $val += (ord($this->data[$i*3+1]) - ord('0')) * 10; $val += (ord($this->data[$i*3+2]) - ord('0')); $bs->appendNum(10, $val); } if($this->size - $words * 3 == 1) { $val = ord($this->data[$words*3]) - ord('0'); $bs->appendNum(4, $val); } else if($this->size - $words * 3 == 2) { $val = (ord($this->data[$words*3 ]) - ord('0')) * 10; $val += (ord($this->data[$words*3+1]) - ord('0')); $bs->appendNum(7, $val); } $this->bstream = $bs; return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function encodeModeAn($version) { try { $words = (int)($this->size / 2); $bs = new QRbitstream(); $bs->appendNum(4, 0x02); $bs->appendNum(QRspec::lengthIndicator(QR_MODE_AN, $version), $this->size); for($i=0; $i<$words; $i++) { $val = (int)QRinput::lookAnTable(ord($this->data[$i*2 ])) * 45; $val += (int)QRinput::lookAnTable(ord($this->data[$i*2+1])); $bs->appendNum(11, $val); } if($this->size & 1) { $val = QRinput::lookAnTable(ord($this->data[$words * 2])); $bs->appendNum(6, $val); } $this->bstream = $bs; return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function encodeMode8($version) { try { $bs = new QRbitstream(); $bs->appendNum(4, 0x4); $bs->appendNum(QRspec::lengthIndicator(QR_MODE_8, $version), $this->size); for($i=0; $i<$this->size; $i++) { $bs->appendNum(8, ord($this->data[$i])); } $this->bstream = $bs; return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function encodeModeKanji($version) { try { $bs = new QRbitrtream(); $bs->appendNum(4, 0x8); $bs->appendNum(QRspec::lengthIndicator(QR_MODE_KANJI, $version), (int)($this->size / 2)); for($i=0; $i<$this->size; $i+=2) { $val = (ord($this->data[$i]) << 8) | ord($this->data[$i+1]); if($val <= 0x9ffc) { $val -= 0x8140; } else { $val -= 0xc140; } $h = ($val >> 8) * 0xc0; $val = ($val & 0xff) + $h; $bs->appendNum(13, $val); } $this->bstream = $bs; return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function encodeModeStructure() { try { $bs = new QRbitstream(); $bs->appendNum(4, 0x03); $bs->appendNum(4, ord($this->data[1]) - 1); $bs->appendNum(4, ord($this->data[0]) - 1); $bs->appendNum(8, ord($this->data[2])); $this->bstream = $bs; return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function estimateBitStreamSizeOfEntry($version) { $bits = 0; if($version == 0) $version = 1; switch($this->mode) { case QR_MODE_NUM: $bits = QRinput::estimateBitsModeNum($this->size); break; case QR_MODE_AN: $bits = QRinput::estimateBitsModeAn($this->size); break; case QR_MODE_8: $bits = QRinput::estimateBitsMode8($this->size); break; case QR_MODE_KANJI: $bits = QRinput::estimateBitsModeKanji($this->size);break; case QR_MODE_STRUCTURE: return STRUCTURE_HEADER_BITS; default: return 0; } $l = QRspec::lengthIndicator($this->mode, $version); $m = 1 << $l; $num = (int)(($this->size + $m - 1) / $m); $bits += $num * (4 + $l); return $bits; } //---------------------------------------------------------------------- public function encodeBitStream($version) { try { unset($this->bstream); $words = QRspec::maximumWords($this->mode, $version); if($this->size > $words) { $st1 = new QRinputItem($this->mode, $words, $this->data); $st2 = new QRinputItem($this->mode, $this->size - $words, array_slice($this->data, $words)); $st1->encodeBitStream($version); $st2->encodeBitStream($version); $this->bstream = new QRbitstream(); $this->bstream->append($st1->bstream); $this->bstream->append($st2->bstream); unset($st1); unset($st2); } else { $ret = 0; switch($this->mode) { case QR_MODE_NUM: $ret = $this->encodeModeNum($version); break; case QR_MODE_AN: $ret = $this->encodeModeAn($version); break; case QR_MODE_8: $ret = $this->encodeMode8($version); break; case QR_MODE_KANJI: $ret = $this->encodeModeKanji($version);break; case QR_MODE_STRUCTURE: $ret = $this->encodeModeStructure(); break; default: break; } if($ret < 0) return -1; } return $this->bstream->size(); } catch (Exception $e) { return -1; } } }; //########################################################################## class QRinput { public $items; private $version; private $level; //---------------------------------------------------------------------- public function __construct($version = 0, $level = QR_ECLEVEL_L) { if ($version < 0 || $version > QRSPEC_VERSION_MAX || $level > 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 > 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 > 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 > MAX_STRUCTURED_SYMBOLS ) { throw new Exception('insertStructuredAppendHeader wrong size'); } if( $index <= 0 || $index > MAX_STRUCTURED_SYMBOLS ) { throw new Exception('insertStructuredAppendHeader wrong index'); } $buf = array($size, $index, $parity); try { $entry = new QRinputItem(QR_MODE_STRUCTURE, 3, buf); array_unshift($this->items, $entry); return 0; } catch (Exception $e) { return -1; } } //---------------------------------------------------------------------- public function calcParity() { $parity = 0; foreach($this->items as $item) { if($item->mode != 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($mode) { case QR_MODE_NUM: return self::checkModeNum($size, $data); break; case QR_MODE_AN: return self::checkModeAn($size, $data); break; case QR_MODE_KANJI: return self::checkModeKanji($size, $data); break; case QR_MODE_8: return true; break; case QR_MODE_STRUCTURE: return true; break; default: break; } return false; } //---------------------------------------------------------------------- public function estimateBitStreamSize($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 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 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; } $maxsize = QRspec::maximumWords($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(); } }
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