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qrcode.php
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1 <?php
2 //============================================================+
3 // File name : qrcode.php
4 // Version : 1.0.010
5 // Begin : 2010-03-22
6 // Last Update : 2012-07-25
7 // Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
8 // License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
9 // -------------------------------------------------------------------
10 // Copyright (C) 2010-2012 Nicola Asuni - Tecnick.com LTD
11 //
12 // This file is part of TCPDF software library.
13 //
14 // TCPDF is free software: you can redistribute it and/or modify it
15 // under the terms of the GNU Lesser General Public License as
16 // published by the Free Software Foundation, either version 3 of the
17 // License, or (at your option) any later version.
18 //
19 // TCPDF is distributed in the hope that it will be useful, but
20 // WITHOUT ANY WARRANTY; without even the implied warranty of
21 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
22 // See the GNU Lesser General Public License for more details.
23 //
24 // You should have received a copy of the GNU Lesser General Public License
25 // along with TCPDF. If not, see <http://www.gnu.org/licenses/>.
26 //
27 // See LICENSE.TXT file for more information.
28 // -------------------------------------------------------------------
29 //
30 // DESCRIPTION :
31 //
32 // Class to create QR-code arrays for TCPDF class.
33 // QR Code symbol is a 2D barcode that can be scanned by
34 // handy terminals such as a mobile phone with CCD.
35 // The capacity of QR Code is up to 7000 digits or 4000
36 // characters, and has high robustness.
37 // This class supports QR Code model 2, described in
38 // JIS (Japanese Industrial Standards) X0510:2004
39 // or ISO/IEC 18004.
40 // Currently the following features are not supported:
41 // ECI and FNC1 mode, Micro QR Code, QR Code model 1,
42 // Structured mode.
43 //
44 // This class is derived from the following projects:
45 // ---------------------------------------------------------
46 // "PHP QR Code encoder"
47 // License: GNU-LGPLv3
48 // Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm>
49 // http://phpqrcode.sourceforge.net/
50 // https://sourceforge.net/projects/phpqrcode/
51 //
52 // The "PHP QR Code encoder" is based on
53 // "C libqrencode library" (ver. 3.1.1)
54 // License: GNU-LGPL 2.1
55 // Copyright (C) 2006-2010 by Kentaro Fukuchi
56 // http://megaui.net/fukuchi/works/qrencode/index.en.html
57 //
58 // Reed-Solomon code encoder is written by Phil Karn, KA9Q.
59 // Copyright (C) 2002-2006 Phil Karn, KA9Q
60 //
61 // QR Code is registered trademark of DENSO WAVE INCORPORATED
62 // http://www.denso-wave.com/qrcode/index-e.html
63 // ---------------------------------------------------------
64 //============================================================+
65 
82 // definitions
83 if (!defined('QRCODEDEFS')) {
84 
88  define('QRCODEDEFS', true);
89 
90  // -----------------------------------------------------
91 
92  // Encoding modes (characters which can be encoded in QRcode)
93 
97  define('QR_MODE_NL', -1);
98 
102  define('QR_MODE_NM', 0);
103 
107  define('QR_MODE_AN', 1);
108 
112  define('QR_MODE_8B', 2);
113 
117  define('QR_MODE_KJ', 3);
118 
122  define('QR_MODE_ST', 4);
123 
124  // -----------------------------------------------------
125 
126  // Levels of error correction.
127  // QRcode has a function of an error correcting for miss reading that white is black.
128  // Error correcting is defined in 4 level as below.
129 
133  define('QR_ECLEVEL_L', 0);
134 
138  define('QR_ECLEVEL_M', 1);
139 
143  define('QR_ECLEVEL_Q', 2);
144 
148  define('QR_ECLEVEL_H', 3);
149 
150  // -----------------------------------------------------
151 
152  // Version. Size of QRcode is defined as version.
153  // Version is from 1 to 40.
154  // Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases.
155  // So version 40 is 177*177 matrix.
156 
160  define('QRSPEC_VERSION_MAX', 40);
161 
165  define('QRSPEC_WIDTH_MAX', 177);
166 
167  // -----------------------------------------------------
168 
172  define('QRCAP_WIDTH', 0);
173 
177  define('QRCAP_WORDS', 1);
178 
182  define('QRCAP_REMINDER', 2);
183 
187  define('QRCAP_EC', 3);
188 
189  // -----------------------------------------------------
190 
191  // Structure (currently usupported)
192 
196  define('STRUCTURE_HEADER_BITS', 20);
197 
201  define('MAX_STRUCTURED_SYMBOLS', 16);
202 
203  // -----------------------------------------------------
204 
205  // Masks
206 
210  define('N1', 3);
211 
215  define('N2', 3);
216 
220  define('N3', 40);
221 
225  define('N4', 10);
226 
227  // -----------------------------------------------------
228 
229  // Optimization settings
230 
234  define('QR_FIND_BEST_MASK', true);
235 
239  define('QR_FIND_FROM_RANDOM', 2);
240 
244  define('QR_DEFAULT_MASK', 2);
245 
246  // -----------------------------------------------------
247 
248 } // end of definitions
249 
250 // #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#
251 
252 // for compatibility with PHP4
253 if (!function_exists('str_split')) {
260  function str_split($string, $split_length=1) {
261  if ((strlen($string) > $split_length) OR (!$split_length)) {
262  do {
263  $c = strlen($string);
264  $parts[] = substr($string, 0, $split_length);
265  $string = substr($string, $split_length);
266  } while ($string !== false);
267  } else {
268  $parts = array($string);
269  }
270  return $parts;
271  }
272 }
273 
274 // #####################################################
275 
291 class QRcode {
292 
297  protected $barcode_array = array();
298 
303  protected $version = 0;
304 
309  protected $level = QR_ECLEVEL_L;
310 
315  protected $hint = QR_MODE_8B;
316 
321  protected $casesensitive = true;
322 
327  protected $structured = 0;
328 
333  protected $data;
334 
335  // FrameFiller
336 
341  protected $width;
342 
347  protected $frame;
348 
353  protected $x;
354 
359  protected $y;
360 
365  protected $dir;
366 
371  protected $bit;
372 
373  // ---- QRrawcode ----
374 
379  protected $datacode = array();
380 
385  protected $ecccode = array();
386 
391  protected $blocks;
392 
397  protected $rsblocks = array(); //of RSblock
398 
403  protected $count;
404 
409  protected $dataLength;
410 
415  protected $eccLength;
416 
421  protected $b1;
422 
423  // ---- QRmask ----
424 
429  protected $runLength = array();
430 
431  // ---- QRsplit ----
432 
437  protected $dataStr = '';
438 
443  protected $items;
444 
445  // Reed-Solomon items
446 
451  protected $rsitems = array();
452 
457  protected $frames = array();
458 
463  protected $anTable = array(
464  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
465  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
466  36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, //
467  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, //
468  -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, //
469  25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, //
470  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
471  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 //
472  );
473 
479  protected $capacity = array(
480  array( 0, 0, 0, array( 0, 0, 0, 0)), //
481  array( 21, 26, 0, array( 7, 10, 13, 17)), // 1
482  array( 25, 44, 7, array( 10, 16, 22, 28)), //
483  array( 29, 70, 7, array( 15, 26, 36, 44)), //
484  array( 33, 100, 7, array( 20, 36, 52, 64)), //
485  array( 37, 134, 7, array( 26, 48, 72, 88)), // 5
486  array( 41, 172, 7, array( 36, 64, 96, 112)), //
487  array( 45, 196, 0, array( 40, 72, 108, 130)), //
488  array( 49, 242, 0, array( 48, 88, 132, 156)), //
489  array( 53, 292, 0, array( 60, 110, 160, 192)), //
490  array( 57, 346, 0, array( 72, 130, 192, 224)), // 10
491  array( 61, 404, 0, array( 80, 150, 224, 264)), //
492  array( 65, 466, 0, array( 96, 176, 260, 308)), //
493  array( 69, 532, 0, array( 104, 198, 288, 352)), //
494  array( 73, 581, 3, array( 120, 216, 320, 384)), //
495  array( 77, 655, 3, array( 132, 240, 360, 432)), // 15
496  array( 81, 733, 3, array( 144, 280, 408, 480)), //
497  array( 85, 815, 3, array( 168, 308, 448, 532)), //
498  array( 89, 901, 3, array( 180, 338, 504, 588)), //
499  array( 93, 991, 3, array( 196, 364, 546, 650)), //
500  array( 97, 1085, 3, array( 224, 416, 600, 700)), // 20
501  array(101, 1156, 4, array( 224, 442, 644, 750)), //
502  array(105, 1258, 4, array( 252, 476, 690, 816)), //
503  array(109, 1364, 4, array( 270, 504, 750, 900)), //
504  array(113, 1474, 4, array( 300, 560, 810, 960)), //
505  array(117, 1588, 4, array( 312, 588, 870, 1050)), // 25
506  array(121, 1706, 4, array( 336, 644, 952, 1110)), //
507  array(125, 1828, 4, array( 360, 700, 1020, 1200)), //
508  array(129, 1921, 3, array( 390, 728, 1050, 1260)), //
509  array(133, 2051, 3, array( 420, 784, 1140, 1350)), //
510  array(137, 2185, 3, array( 450, 812, 1200, 1440)), // 30
511  array(141, 2323, 3, array( 480, 868, 1290, 1530)), //
512  array(145, 2465, 3, array( 510, 924, 1350, 1620)), //
513  array(149, 2611, 3, array( 540, 980, 1440, 1710)), //
514  array(153, 2761, 3, array( 570, 1036, 1530, 1800)), //
515  array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35
516  array(161, 3034, 0, array( 600, 1120, 1680, 1980)), //
517  array(165, 3196, 0, array( 630, 1204, 1770, 2100)), //
518  array(169, 3362, 0, array( 660, 1260, 1860, 2220)), //
519  array(173, 3532, 0, array( 720, 1316, 1950, 2310)), //
520  array(177, 3706, 0, array( 750, 1372, 2040, 2430)) // 40
521  );
522 
527  protected $lengthTableBits = array(
528  array(10, 12, 14),
529  array( 9, 11, 13),
530  array( 8, 16, 16),
531  array( 8, 10, 12)
532  );
533 
539  protected $eccTable = array(
540  array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)), //
541  array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1
542  array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), //
543  array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)), //
544  array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)), //
545  array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5
546  array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)), //
547  array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)), //
548  array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)), //
549  array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)), //
550  array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), // 10
551  array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)), //
552  array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)), //
553  array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)), //
554  array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)), //
555  array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), // 15
556  array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)), //
557  array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)), //
558  array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)), //
559  array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)), //
560  array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), // 20
561  array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)), //
562  array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)), //
563  array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)), //
564  array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)), //
565  array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), // 25
566  array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)), //
567  array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)), //
568  array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), //
569  array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)), //
570  array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30
571  array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)), //
572  array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)), //
573  array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)), //
574  array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)), //
575  array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), // 35
576  array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), //
577  array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)), //
578  array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), //
579  array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)), //
580  array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)) // 40
581  );
582 
589  protected $alignmentPattern = array(
590  array( 0, 0),
591  array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5
592  array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10
593  array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15
594  array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20
595  array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25
596  array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30
597  array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35
598  array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58) // 35-40
599  );
600 
607  protected $versionPattern = array(
608  0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, //
609  0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, //
610  0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, //
611  0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, //
612  0x27541, 0x28c69
613  );
614 
619  protected $formatInfo = array(
620  array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), //
621  array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), //
622  array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), //
623  array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b) //
624  );
625 
626 
627  // -------------------------------------------------
628  // -------------------------------------------------
629 
630 
639  public function __construct($code, $eclevel = 'L') {
640  $barcode_array = array();
641  if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
642  return false;
643  }
644  // set error correction level
645  $this->level = array_search($eclevel, array('L', 'M', 'Q', 'H'));
646  if ($this->level === false) {
647  $this->level = QR_ECLEVEL_L;
648  }
649  if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) {
650  return false;
651  }
652  if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) {
653  return false;
654  }
655  $this->items = array();
656  $this->encodeString($code);
657  if (is_null($this->data)) {
658  return false;
659  }
660  $qrTab = $this->binarize($this->data);
661  $size = count($qrTab);
662  $barcode_array['num_rows'] = $size;
663  $barcode_array['num_cols'] = $size;
664  $barcode_array['bcode'] = array();
665  foreach ($qrTab as $line) {
666  $arrAdd = array();
667  foreach (str_split($line) as $char) {
668  $arrAdd[] = ($char=='1')?1:0;
669  }
670  $barcode_array['bcode'][] = $arrAdd;
671  }
672  $this->barcode_array = $barcode_array;
673  }
674 
680  public function getBarcodeArray() {
681  return $this->barcode_array;
682  }
683 
689  protected function binarize($frame) {
690  $len = count($frame);
691  // the frame is square (width = height)
692  foreach ($frame as &$frameLine) {
693  for ($i=0; $i<$len; $i++) {
694  $frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0';
695  }
696  }
697  return $frame;
698  }
699 
704  protected function encodeString($string) {
705  $this->dataStr = $string;
706  if (!$this->casesensitive) {
707  $this->toUpper();
708  }
709  $ret = $this->splitString();
710  if ($ret < 0) {
711  return NULL;
712  }
713  $this->encodeMask(-1);
714  }
715 
720  protected function encodeMask($mask) {
721  $spec = array(0, 0, 0, 0, 0);
722  $this->datacode = $this->getByteStream($this->items);
723  if (is_null($this->datacode)) {
724  return NULL;
725  }
726  $spec = $this->getEccSpec($this->version, $this->level, $spec);
727  $this->b1 = $this->rsBlockNum1($spec);
728  $this->dataLength = $this->rsDataLength($spec);
729  $this->eccLength = $this->rsEccLength($spec);
730  $this->ecccode = array_fill(0, $this->eccLength, 0);
731  $this->blocks = $this->rsBlockNum($spec);
732  $ret = $this->init($spec);
733  if ($ret < 0) {
734  return NULL;
735  }
736  $this->count = 0;
737  $this->width = $this->getWidth($this->version);
738  $this->frame = $this->newFrame($this->version);
739  $this->x = $this->width - 1;
740  $this->y = $this->width - 1;
741  $this->dir = -1;
742  $this->bit = -1;
743  // inteleaved data and ecc codes
744  for ($i=0; $i < ($this->dataLength + $this->eccLength); $i++) {
745  $code = $this->getCode();
746  $bit = 0x80;
747  for ($j=0; $j<8; $j++) {
748  $addr = $this->getNextPosition();
749  $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0));
750  $bit = $bit >> 1;
751  }
752  }
753  // remainder bits
754  $j = $this->getRemainder($this->version);
755  for ($i=0; $i<$j; $i++) {
756  $addr = $this->getNextPosition();
757  $this->setFrameAt($addr, 0x02);
758  }
759  // masking
760  $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
761  if ($mask < 0) {
762  if (QR_FIND_BEST_MASK) {
763  $masked = $this->mask($this->width, $this->frame, $this->level);
764  } else {
765  $masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level);
766  }
767  } else {
768  $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level);
769  }
770  if ($masked == NULL) {
771  return NULL;
772  }
773  $this->data = $masked;
774  }
775 
776  // - - - - - - - - - - - - - - - - - - - - - - - - -
777 
778  // FrameFiller
779 
785  protected function setFrameAt($at, $val) {
786  $this->frame[$at['y']][$at['x']] = chr($val);
787  }
788 
794  protected function getFrameAt($at) {
795  return ord($this->frame[$at['y']][$at['x']]);
796  }
797 
802  protected function getNextPosition() {
803  do {
804  if ($this->bit == -1) {
805  $this->bit = 0;
806  return array('x'=>$this->x, 'y'=>$this->y);
807  }
808  $x = $this->x;
809  $y = $this->y;
810  $w = $this->width;
811  if ($this->bit == 0) {
812  $x--;
813  $this->bit++;
814  } else {
815  $x++;
816  $y += $this->dir;
817  $this->bit--;
818  }
819  if ($this->dir < 0) {
820  if ($y < 0) {
821  $y = 0;
822  $x -= 2;
823  $this->dir = 1;
824  if ($x == 6) {
825  $x--;
826  $y = 9;
827  }
828  }
829  } else {
830  if ($y == $w) {
831  $y = $w - 1;
832  $x -= 2;
833  $this->dir = -1;
834  if ($x == 6) {
835  $x--;
836  $y -= 8;
837  }
838  }
839  }
840  if (($x < 0) OR ($y < 0)) {
841  return NULL;
842  }
843  $this->x = $x;
844  $this->y = $y;
845  } while(ord($this->frame[$y][$x]) & 0x80);
846  return array('x'=>$x, 'y'=>$y);
847  }
848 
849  // - - - - - - - - - - - - - - - - - - - - - - - - -
850 
851  // QRrawcode
852 
858  protected function init($spec) {
859  $dl = $this->rsDataCodes1($spec);
860  $el = $this->rsEccCodes1($spec);
861  $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
862  $blockNo = 0;
863  $dataPos = 0;
864  $eccPos = 0;
865  $endfor = $this->rsBlockNum1($spec);
866  for ($i=0; $i < $endfor; ++$i) {
867  $ecc = array_slice($this->ecccode, $eccPos);
868  $this->rsblocks[$blockNo] = array();
869  $this->rsblocks[$blockNo]['dataLength'] = $dl;
870  $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
871  $this->rsblocks[$blockNo]['eccLength'] = $el;
872  $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
873  $this->rsblocks[$blockNo]['ecc'] = $ecc;
874  $this->ecccode = array_merge(array_slice($this->ecccode,0, $eccPos), $ecc);
875  $dataPos += $dl;
876  $eccPos += $el;
877  $blockNo++;
878  }
879  if ($this->rsBlockNum2($spec) == 0) {
880  return 0;
881  }
882  $dl = $this->rsDataCodes2($spec);
883  $el = $this->rsEccCodes2($spec);
884  $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
885  if ($rs == NULL) {
886  return -1;
887  }
888  $endfor = $this->rsBlockNum2($spec);
889  for ($i=0; $i < $endfor; ++$i) {
890  $ecc = array_slice($this->ecccode, $eccPos);
891  $this->rsblocks[$blockNo] = array();
892  $this->rsblocks[$blockNo]['dataLength'] = $dl;
893  $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
894  $this->rsblocks[$blockNo]['eccLength'] = $el;
895  $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
896  $this->rsblocks[$blockNo]['ecc'] = $ecc;
897  $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);
898  $dataPos += $dl;
899  $eccPos += $el;
900  $blockNo++;
901  }
902  return 0;
903  }
904 
909  protected function getCode() {
910  if ($this->count < $this->dataLength) {
911  $row = $this->count % $this->blocks;
912  $col = $this->count / $this->blocks;
913  if ($col >= $this->rsblocks[0]['dataLength']) {
914  $row += $this->b1;
915  }
916  $ret = $this->rsblocks[$row]['data'][$col];
917  } elseif ($this->count < $this->dataLength + $this->eccLength) {
918  $row = ($this->count - $this->dataLength) % $this->blocks;
919  $col = ($this->count - $this->dataLength) / $this->blocks;
920  $ret = $this->rsblocks[$row]['ecc'][$col];
921  } else {
922  return 0;
923  }
924  $this->count++;
925  return $ret;
926  }
927 
928  // - - - - - - - - - - - - - - - - - - - - - - - - -
929 
930  // QRmask
931 
940  protected function writeFormatInformation($width, &$frame, $mask, $level) {
941  $blacks = 0;
942  $format = $this->getFormatInfo($mask, $level);
943  for ($i=0; $i<8; ++$i) {
944  if ($format & 1) {
945  $blacks += 2;
946  $v = 0x85;
947  } else {
948  $v = 0x84;
949  }
950  $frame[8][$width - 1 - $i] = chr($v);
951  if ($i < 6) {
952  $frame[$i][8] = chr($v);
953  } else {
954  $frame[$i + 1][8] = chr($v);
955  }
956  $format = $format >> 1;
957  }
958  for ($i=0; $i<7; ++$i) {
959  if ($format & 1) {
960  $blacks += 2;
961  $v = 0x85;
962  } else {
963  $v = 0x84;
964  }
965  $frame[$width - 7 + $i][8] = chr($v);
966  if ($i == 0) {
967  $frame[8][7] = chr($v);
968  } else {
969  $frame[8][6 - $i] = chr($v);
970  }
971  $format = $format >> 1;
972  }
973  return $blacks;
974  }
975 
982  protected function mask0($x, $y) {
983  return ($x + $y) & 1;
984  }
985 
992  protected function mask1($x, $y) {
993  return ($y & 1);
994  }
995 
1002  protected function mask2($x, $y) {
1003  return ($x % 3);
1004  }
1005 
1012  protected function mask3($x, $y) {
1013  return ($x + $y) % 3;
1014  }
1015 
1022  protected function mask4($x, $y) {
1023  return (((int)($y / 2)) + ((int)($x / 3))) & 1;
1024  }
1025 
1032  protected function mask5($x, $y) {
1033  return (($x * $y) & 1) + ($x * $y) % 3;
1034  }
1035 
1042  protected function mask6($x, $y) {
1043  return ((($x * $y) & 1) + ($x * $y) % 3) & 1;
1044  }
1045 
1052  protected function mask7($x, $y) {
1053  return ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
1054  }
1055 
1063  protected function generateMaskNo($maskNo, $width, $frame) {
1064  $bitMask = array_fill(0, $width, array_fill(0, $width, 0));
1065  for ($y=0; $y<$width; ++$y) {
1066  for ($x=0; $x<$width; ++$x) {
1067  if (ord($frame[$y][$x]) & 0x80) {
1068  $bitMask[$y][$x] = 0;
1069  } else {
1070  $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
1071  $bitMask[$y][$x] = ($maskFunc == 0)?1:0;
1072  }
1073  }
1074  }
1075  return $bitMask;
1076  }
1077 
1087  protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) {
1088  $b = 0;
1089  $bitMask = array();
1090  $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d);
1091  if ($maskGenOnly) {
1092  return;
1093  }
1094  $d = $s;
1095  for ($y=0; $y<$width; ++$y) {
1096  for ($x=0; $x<$width; ++$x) {
1097  if ($bitMask[$y][$x] == 1) {
1098  $d[$y][$x] = chr(ord($s[$y][$x]) ^ ((int)($bitMask[$y][$x])));
1099  }
1100  $b += (int)(ord($d[$y][$x]) & 1);
1101  }
1102  }
1103  return $b;
1104  }
1105 
1114  protected function makeMask($width, $frame, $maskNo, $level) {
1115  $masked = array_fill(0, $width, str_repeat("\0", $width));
1116  $this->makeMaskNo($maskNo, $width, $frame, $masked);
1117  $this->writeFormatInformation($width, $masked, $maskNo, $level);
1118  return $masked;
1119  }
1120 
1126  protected function calcN1N3($length) {
1127  $demerit = 0;
1128  for ($i=0; $i<$length; ++$i) {
1129  if ($this->runLength[$i] >= 5) {
1130  $demerit += (N1 + ($this->runLength[$i] - 5));
1131  }
1132  if ($i & 1) {
1133  if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) {
1134  $fact = (int)($this->runLength[$i] / 3);
1135  if (($this->runLength[$i-2] == $fact)
1136  AND ($this->runLength[$i-1] == $fact)
1137  AND ($this->runLength[$i+1] == $fact)
1138  AND ($this->runLength[$i+2] == $fact)) {
1139  if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) {
1140  $demerit += N3;
1141  } elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) {
1142  $demerit += N3;
1143  }
1144  }
1145  }
1146  }
1147  }
1148  return $demerit;
1149  }
1150 
1157  protected function evaluateSymbol($width, $frame) {
1158  $head = 0;
1159  $demerit = 0;
1160  for ($y=0; $y<$width; ++$y) {
1161  $head = 0;
1162  $this->runLength[0] = 1;
1163  $frameY = $frame[$y];
1164  if ($y > 0) {
1165  $frameYM = $frame[$y-1];
1166  }
1167  for ($x=0; $x<$width; ++$x) {
1168  if (($x > 0) AND ($y > 0)) {
1169  $b22 = ord($frameY[$x]) & ord($frameY[$x-1]) & ord($frameYM[$x]) & ord($frameYM[$x-1]);
1170  $w22 = ord($frameY[$x]) | ord($frameY[$x-1]) | ord($frameYM[$x]) | ord($frameYM[$x-1]);
1171  if (($b22 | ($w22 ^ 1)) & 1) {
1172  $demerit += N2;
1173  }
1174  }
1175  if (($x == 0) AND (ord($frameY[$x]) & 1)) {
1176  $this->runLength[0] = -1;
1177  $head = 1;
1178  $this->runLength[$head] = 1;
1179  } elseif ($x > 0) {
1180  if ((ord($frameY[$x]) ^ ord($frameY[$x-1])) & 1) {
1181  $head++;
1182  $this->runLength[$head] = 1;
1183  } else {
1184  $this->runLength[$head]++;
1185  }
1186  }
1187  }
1188  $demerit += $this->calcN1N3($head+1);
1189  }
1190  for ($x=0; $x<$width; ++$x) {
1191  $head = 0;
1192  $this->runLength[0] = 1;
1193  for ($y=0; $y<$width; ++$y) {
1194  if (($y == 0) AND (ord($frame[$y][$x]) & 1)) {
1195  $this->runLength[0] = -1;
1196  $head = 1;
1197  $this->runLength[$head] = 1;
1198  } elseif ($y > 0) {
1199  if ((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) {
1200  $head++;
1201  $this->runLength[$head] = 1;
1202  } else {
1203  $this->runLength[$head]++;
1204  }
1205  }
1206  }
1207  $demerit += $this->calcN1N3($head+1);
1208  }
1209  return $demerit;
1210  }
1211 
1219  protected function mask($width, $frame, $level) {
1220  $minDemerit = PHP_INT_MAX;
1221  $bestMaskNum = 0;
1222  $bestMask = array();
1223  $checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7);
1224  if (QR_FIND_FROM_RANDOM !== false) {
1225  $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
1226  for ($i = 0; $i < $howManuOut; ++$i) {
1227  $remPos = rand (0, count($checked_masks)-1);
1228  unset($checked_masks[$remPos]);
1229  $checked_masks = array_values($checked_masks);
1230  }
1231  }
1232  $bestMask = $frame;
1233  foreach ($checked_masks as $i) {
1234  $mask = array_fill(0, $width, str_repeat("\0", $width));
1235  $demerit = 0;
1236  $blacks = 0;
1237  $blacks = $this->makeMaskNo($i, $width, $frame, $mask);
1238  $blacks += $this->writeFormatInformation($width, $mask, $i, $level);
1239  $blacks = (int)(100 * $blacks / ($width * $width));
1240  $demerit = (int)((int)(abs($blacks - 50) / 5) * N4);
1241  $demerit += $this->evaluateSymbol($width, $mask);
1242  if ($demerit < $minDemerit) {
1243  $minDemerit = $demerit;
1244  $bestMask = $mask;
1245  $bestMaskNum = $i;
1246  }
1247  }
1248  return $bestMask;
1249  }
1250 
1251  // - - - - - - - - - - - - - - - - - - - - - - - - -
1252 
1253  // QRsplit
1254 
1261  protected function isdigitat($str, $pos) {
1262  if ($pos >= strlen($str)) {
1263  return false;
1264  }
1265  return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9')));
1266  }
1267 
1274  protected function isalnumat($str, $pos) {
1275  if ($pos >= strlen($str)) {
1276  return false;
1277  }
1278  return ($this->lookAnTable(ord($str[$pos])) >= 0);
1279  }
1280 
1286  protected function identifyMode($pos) {
1287  if ($pos >= strlen($this->dataStr)) {
1288  return QR_MODE_NL;
1289  }
1290  $c = $this->dataStr[$pos];
1291  if ($this->isdigitat($this->dataStr, $pos)) {
1292  return QR_MODE_NM;
1293  } elseif ($this->isalnumat($this->dataStr, $pos)) {
1294  return QR_MODE_AN;
1295  } elseif ($this->hint == QR_MODE_KJ) {
1296  if ($pos+1 < strlen($this->dataStr)) {
1297  $d = $this->dataStr[$pos+1];
1298  $word = (ord($c) << 8) | ord($d);
1299  if (($word >= 0x8140 && $word <= 0x9ffc) OR ($word >= 0xe040 && $word <= 0xebbf)) {
1300  return QR_MODE_KJ;
1301  }
1302  }
1303  }
1304  return QR_MODE_8B;
1305  }
1306 
1311  protected function eatNum() {
1312  $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1313  $p = 0;
1314  while($this->isdigitat($this->dataStr, $p)) {
1315  $p++;
1316  }
1317  $run = $p;
1318  $mode = $this->identifyMode($p);
1319  if ($mode == QR_MODE_8B) {
1320  $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1321  + $this->estimateBitsMode8(1) // + 4 + l8
1322  - $this->estimateBitsMode8($run + 1); // - 4 - l8
1323  if ($dif > 0) {
1324  return $this->eat8();
1325  }
1326  }
1327  if ($mode == QR_MODE_AN) {
1328  $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1329  + $this->estimateBitsModeAn(1) // + 4 + la
1330  - $this->estimateBitsModeAn($run + 1);// - 4 - la
1331  if ($dif > 0) {
1332  return $this->eatAn();
1333  }
1334  }
1335  $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr));
1336  return $run;
1337  }
1338 
1343  protected function eatAn() {
1344  $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
1345  $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1346  $p =1 ;
1347  while($this->isalnumat($this->dataStr, $p)) {
1348  if ($this->isdigitat($this->dataStr, $p)) {
1349  $q = $p;
1350  while($this->isdigitat($this->dataStr, $q)) {
1351  $q++;
1352  }
1353  $dif = $this->estimateBitsModeAn($p) // + 4 + la
1354  + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1355  - $this->estimateBitsModeAn($q); // - 4 - la
1356  if ($dif < 0) {
1357  break;
1358  } else {
1359  $p = $q;
1360  }
1361  } else {
1362  $p++;
1363  }
1364  }
1365  $run = $p;
1366  if (!$this->isalnumat($this->dataStr, $p)) {
1367  $dif = $this->estimateBitsModeAn($run) + 4 + $la
1368  + $this->estimateBitsMode8(1) // + 4 + l8
1369  - $this->estimateBitsMode8($run + 1); // - 4 - l8
1370  if ($dif > 0) {
1371  return $this->eat8();
1372  }
1373  }
1374  $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr));
1375  return $run;
1376  }
1377 
1382  protected function eatKanji() {
1383  $p = 0;
1384  while($this->identifyMode($p) == QR_MODE_KJ) {
1385  $p += 2;
1386  }
1387  $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr));
1388  return $run;
1389  }
1390 
1395  protected function eat8() {
1396  $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
1397  $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1398  $p = 1;
1399  $dataStrLen = strlen($this->dataStr);
1400  while($p < $dataStrLen) {
1401  $mode = $this->identifyMode($p);
1402  if ($mode == QR_MODE_KJ) {
1403  break;
1404  }
1405  if ($mode == QR_MODE_NM) {
1406  $q = $p;
1407  while($this->isdigitat($this->dataStr, $q)) {
1408  $q++;
1409  }
1410  $dif = $this->estimateBitsMode8($p) // + 4 + l8
1411  + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1412  - $this->estimateBitsMode8($q); // - 4 - l8
1413  if ($dif < 0) {
1414  break;
1415  } else {
1416  $p = $q;
1417  }
1418  } elseif ($mode == QR_MODE_AN) {
1419  $q = $p;
1420  while($this->isalnumat($this->dataStr, $q)) {
1421  $q++;
1422  }
1423  $dif = $this->estimateBitsMode8($p) // + 4 + l8
1424  + $this->estimateBitsModeAn($q - $p) + 4 + $la
1425  - $this->estimateBitsMode8($q); // - 4 - l8
1426  if ($dif < 0) {
1427  break;
1428  } else {
1429  $p = $q;
1430  }
1431  } else {
1432  $p++;
1433  }
1434  }
1435  $run = $p;
1436  $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr));
1437  return $run;
1438  }
1439 
1444  protected function splitString() {
1445  while (strlen($this->dataStr) > 0) {
1446  $mode = $this->identifyMode(0);
1447  switch ($mode) {
1448  case QR_MODE_NM: {
1449  $length = $this->eatNum();
1450  break;
1451  }
1452  case QR_MODE_AN: {
1453  $length = $this->eatAn();
1454  break;
1455  }
1456  case QR_MODE_KJ: {
1457  if ($hint == QR_MODE_KJ) {
1458  $length = $this->eatKanji();
1459  } else {
1460  $length = $this->eat8();
1461  }
1462  break;
1463  }
1464  default: {
1465  $length = $this->eat8();
1466  break;
1467  }
1468  }
1469  if ($length == 0) {
1470  return 0;
1471  }
1472  if ($length < 0) {
1473  return -1;
1474  }
1475  $this->dataStr = substr($this->dataStr, $length);
1476  }
1477  return 0;
1478  }
1479 
1483  protected function toUpper() {
1484  $stringLen = strlen($this->dataStr);
1485  $p = 0;
1486  while ($p < $stringLen) {
1487  $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint);
1488  if ($mode == QR_MODE_KJ) {
1489  $p += 2;
1490  } else {
1491  if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) {
1492  $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
1493  }
1494  $p++;
1495  }
1496  }
1497  return $this->dataStr;
1498  }
1499 
1500  // - - - - - - - - - - - - - - - - - - - - - - - - -
1501 
1502  // QRinputItem
1503 
1512  protected function newInputItem($mode, $size, $data, $bstream=null) {
1513  $setData = array_slice($data, 0, $size);
1514  if (count($setData) < $size) {
1515  $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0));
1516  }
1517  if (!$this->check($mode, $size, $setData)) {
1518  return NULL;
1519  }
1520  $inputitem = array();
1521  $inputitem['mode'] = $mode;
1522  $inputitem['size'] = $size;
1523  $inputitem['data'] = $setData;
1524  $inputitem['bstream'] = $bstream;
1525  return $inputitem;
1526  }
1527 
1534  protected function encodeModeNum($inputitem, $version) {
1535  $words = (int)($inputitem['size'] / 3);
1536  $inputitem['bstream'] = array();
1537  $val = 0x1;
1538  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1539  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']);
1540  for ($i=0; $i < $words; ++$i) {
1541  $val = (ord($inputitem['data'][$i*3 ]) - ord('0')) * 100;
1542  $val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10;
1543  $val += (ord($inputitem['data'][$i*3+2]) - ord('0'));
1544  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
1545  }
1546  if ($inputitem['size'] - $words * 3 == 1) {
1547  $val = ord($inputitem['data'][$words*3]) - ord('0');
1548  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1549  } elseif (($inputitem['size'] - ($words * 3)) == 2) {
1550  $val = (ord($inputitem['data'][$words*3 ]) - ord('0')) * 10;
1551  $val += (ord($inputitem['data'][$words*3+1]) - ord('0'));
1552  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
1553  }
1554  return $inputitem;
1555  }
1556 
1563  protected function encodeModeAn($inputitem, $version) {
1564  $words = (int)($inputitem['size'] / 2);
1565  $inputitem['bstream'] = array();
1566  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
1567  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']);
1568  for ($i=0; $i < $words; ++$i) {
1569  $val = (int)($this->lookAnTable(ord($inputitem['data'][$i*2])) * 45);
1570  $val += (int)($this->lookAnTable(ord($inputitem['data'][($i*2)+1])));
1571  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
1572  }
1573  if ($inputitem['size'] & 1) {
1574  $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)]));
1575  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
1576  }
1577  return $inputitem;
1578  }
1579 
1586  protected function encodeMode8($inputitem, $version) {
1587  $inputitem['bstream'] = array();
1588  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
1589  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']);
1590  for ($i=0; $i < $inputitem['size']; ++$i) {
1591  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i]));
1592  }
1593  return $inputitem;
1594  }
1595 
1602  protected function encodeModeKanji($inputitem, $version) {
1603  $inputitem['bstream'] = array();
1604  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
1605  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2));
1606  for ($i=0; $i<$inputitem['size']; $i+=2) {
1607  $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]);
1608  if ($val <= 0x9ffc) {
1609  $val -= 0x8140;
1610  } else {
1611  $val -= 0xc140;
1612  }
1613  $h = ($val >> 8) * 0xc0;
1614  $val = ($val & 0xff) + $h;
1615  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
1616  }
1617  return $inputitem;
1618  }
1619 
1625  protected function encodeModeStructure($inputitem) {
1626  $inputitem['bstream'] = array();
1627  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
1628  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1);
1629  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1);
1630  $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2]));
1631  return $inputitem;
1632  }
1633 
1640  protected function encodeBitStream($inputitem, $version) {
1641  $inputitem['bstream'] = array();
1642  $words = $this->maximumWords($inputitem['mode'], $version);
1643  if ($inputitem['size'] > $words) {
1644  $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);
1645  $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words));
1646  $st1 = $this->encodeBitStream($st1, $version);
1647  $st2 = $this->encodeBitStream($st2, $version);
1648  $inputitem['bstream'] = array();
1649  $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);
1650  $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
1651  } else {
1652  switch($inputitem['mode']) {
1653  case QR_MODE_NM: {
1654  $inputitem = $this->encodeModeNum($inputitem, $version);
1655  break;
1656  }
1657  case QR_MODE_AN: {
1658  $inputitem = $this->encodeModeAn($inputitem, $version);
1659  break;
1660  }
1661  case QR_MODE_8B: {
1662  $inputitem = $this->encodeMode8($inputitem, $version);
1663  break;
1664  }
1665  case QR_MODE_KJ: {
1666  $inputitem = $this->encodeModeKanji($inputitem, $version);
1667  break;
1668  }
1669  case QR_MODE_ST: {
1670  $inputitem = $this->encodeModeStructure($inputitem);
1671  break;
1672  }
1673  default: {
1674  break;
1675  }
1676  }
1677  }
1678  return $inputitem;
1679  }
1680 
1681  // - - - - - - - - - - - - - - - - - - - - - - - - -
1682 
1683  // QRinput
1684 
1695  protected function appendNewInputItem($items, $mode, $size, $data) {
1696  $newitem = $this->newInputItem($mode, $size, $data);
1697  if (!empty($newitem)) {
1698  $items[] = $newitem;
1699  }
1700  return $items;
1701  }
1702 
1711  protected function insertStructuredAppendHeader($items, $size, $index, $parity) {
1712  if ($size > MAX_STRUCTURED_SYMBOLS) {
1713  return -1;
1714  }
1715  if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) {
1716  return -1;
1717  }
1718  $buf = array($size, $index, $parity);
1719  $entry = $this->newInputItem(QR_MODE_ST, 3, buf);
1720  array_unshift($items, $entry);
1721  return $items;
1722  }
1723 
1729  protected function calcParity($items) {
1730  $parity = 0;
1731  foreach ($items as $item) {
1732  if ($item['mode'] != QR_MODE_ST) {
1733  for ($i=$item['size']-1; $i>=0; --$i) {
1734  $parity ^= $item['data'][$i];
1735  }
1736  }
1737  }
1738  return $parity;
1739  }
1740 
1747  protected function checkModeNum($size, $data) {
1748  for ($i=0; $i<$size; ++$i) {
1749  if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){
1750  return false;
1751  }
1752  }
1753  return true;
1754  }
1755 
1761  protected function lookAnTable($c) {
1762  return (($c > 127)?-1:$this->anTable[$c]);
1763  }
1764 
1771  protected function checkModeAn($size, $data) {
1772  for ($i=0; $i<$size; ++$i) {
1773  if ($this->lookAnTable(ord($data[$i])) == -1) {
1774  return false;
1775  }
1776  }
1777  return true;
1778  }
1779 
1785  protected function estimateBitsModeNum($size) {
1786  $w = (int)($size / 3);
1787  $bits = ($w * 10);
1788  switch($size - ($w * 3)) {
1789  case 1: {
1790  $bits += 4;
1791  break;
1792  }
1793  case 2: {
1794  $bits += 7;
1795  break;
1796  }
1797  }
1798  return $bits;
1799  }
1800 
1806  protected function estimateBitsModeAn($size) {
1807  $bits = (int)($size * 5.5); // (size / 2 ) * 11
1808  if ($size & 1) {
1809  $bits += 6;
1810  }
1811  return $bits;
1812  }
1813 
1819  protected function estimateBitsMode8($size) {
1820  return (int)($size * 8);
1821  }
1822 
1828  protected function estimateBitsModeKanji($size) {
1829  return (int)($size * 6.5); // (size / 2 ) * 13
1830  }
1831 
1838  protected function checkModeKanji($size, $data) {
1839  if ($size & 1) {
1840  return false;
1841  }
1842  for ($i=0; $i<$size; $i+=2) {
1843  $val = (ord($data[$i]) << 8) | ord($data[$i+1]);
1844  if (($val < 0x8140) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) {
1845  return false;
1846  }
1847  }
1848  return true;
1849  }
1850 
1858  protected function check($mode, $size, $data) {
1859  if ($size <= 0) {
1860  return false;
1861  }
1862  switch($mode) {
1863  case QR_MODE_NM: {
1864  return $this->checkModeNum($size, $data);
1865  }
1866  case QR_MODE_AN: {
1867  return $this->checkModeAn($size, $data);
1868  }
1869  case QR_MODE_KJ: {
1870  return $this->checkModeKanji($size, $data);
1871  }
1872  case QR_MODE_8B: {
1873  return true;
1874  }
1875  case QR_MODE_ST: {
1876  return true;
1877  }
1878  default: {
1879  break;
1880  }
1881  }
1882  return false;
1883  }
1884 
1891  protected function estimateBitStreamSize($items, $version) {
1892  $bits = 0;
1893  if ($version == 0) {
1894  $version = 1;
1895  }
1896  foreach ($items as $item) {
1897  switch($item['mode']) {
1898  case QR_MODE_NM: {
1899  $bits = $this->estimateBitsModeNum($item['size']);
1900  break;
1901  }
1902  case QR_MODE_AN: {
1903  $bits = $this->estimateBitsModeAn($item['size']);
1904  break;
1905  }
1906  case QR_MODE_8B: {
1907  $bits = $this->estimateBitsMode8($item['size']);
1908  break;
1909  }
1910  case QR_MODE_KJ: {
1911  $bits = $this->estimateBitsModeKanji($item['size']);
1912  break;
1913  }
1914  case QR_MODE_ST: {
1915  return STRUCTURE_HEADER_BITS;
1916  }
1917  default: {
1918  return 0;
1919  }
1920  }
1921  $l = $this->lengthIndicator($item['mode'], $version);
1922  $m = 1 << $l;
1923  $num = (int)(($item['size'] + $m - 1) / $m);
1924  $bits += $num * (4 + $l);
1925  }
1926  return $bits;
1927  }
1928 
1934  protected function estimateVersion($items) {
1935  $version = 0;
1936  $prev = 0;
1937  do {
1938  $prev = $version;
1939  $bits = $this->estimateBitStreamSize($items, $prev);
1940  $version = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
1941  if ($version < 0) {
1942  return -1;
1943  }
1944  } while ($version > $prev);
1945  return $version;
1946  }
1947 
1955  protected function lengthOfCode($mode, $version, $bits) {
1956  $payload = $bits - 4 - $this->lengthIndicator($mode, $version);
1957  switch($mode) {
1958  case QR_MODE_NM: {
1959  $chunks = (int)($payload / 10);
1960  $remain = $payload - $chunks * 10;
1961  $size = $chunks * 3;
1962  if ($remain >= 7) {
1963  $size += 2;
1964  } elseif ($remain >= 4) {
1965  $size += 1;
1966  }
1967  break;
1968  }
1969  case QR_MODE_AN: {
1970  $chunks = (int)($payload / 11);
1971  $remain = $payload - $chunks * 11;
1972  $size = $chunks * 2;
1973  if ($remain >= 6) {
1974  ++$size;
1975  }
1976  break;
1977  }
1978  case QR_MODE_8B: {
1979  $size = (int)($payload / 8);
1980  break;
1981  }
1982  case QR_MODE_KJ: {
1983  $size = (int)(($payload / 13) * 2);
1984  break;
1985  }
1986  case QR_MODE_ST: {
1987  $size = (int)($payload / 8);
1988  break;
1989  }
1990  default: {
1991  $size = 0;
1992  break;
1993  }
1994  }
1995  $maxsize = $this->maximumWords($mode, $version);
1996  if ($size < 0) {
1997  $size = 0;
1998  }
1999  if ($size > $maxsize) {
2000  $size = $maxsize;
2001  }
2002  return $size;
2003  }
2004 
2010  protected function createBitStream($items) {
2011  $total = 0;
2012  foreach ($items as $key => $item) {
2013  $items[$key] = $this->encodeBitStream($item, $this->version);
2014  $bits = count($items[$key]['bstream']);
2015  $total += $bits;
2016  }
2017  return array($items, $total);
2018  }
2019 
2025  protected function convertData($items) {
2026  $ver = $this->estimateVersion($items);
2027  if ($ver > $this->version) {
2028  $this->version = $ver;
2029  }
2030  while (true) {
2031  $cbs = $this->createBitStream($items);
2032  $items = $cbs[0];
2033  $bits = $cbs[1];
2034  if ($bits < 0) {
2035  return -1;
2036  }
2037  $ver = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
2038  if ($ver < 0) {
2039  return -1;
2040  } elseif ($ver > $this->version) {
2041  $this->version = $ver;
2042  } else {
2043  break;
2044  }
2045  }
2046  return $items;
2047  }
2048 
2054  protected function appendPaddingBit($bstream) {
2055  if (is_null($bstream)) {
2056  return null;
2057  }
2058  $bits = count($bstream);
2059  $maxwords = $this->getDataLength($this->version, $this->level);
2060  $maxbits = $maxwords * 8;
2061  if ($maxbits == $bits) {
2062  return $bstream;
2063  }
2064  if ($maxbits - $bits < 5) {
2065  return $this->appendNum($bstream, $maxbits - $bits, 0);
2066  }
2067  $bits += 4;
2068  $words = (int)(($bits + 7) / 8);
2069  $padding = array();
2070  $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
2071  $padlen = $maxwords - $words;
2072  if ($padlen > 0) {
2073  $padbuf = array();
2074  for ($i=0; $i<$padlen; ++$i) {
2075  $padbuf[$i] = ($i&1)?0x11:0xec;
2076  }
2077  $padding = $this->appendBytes($padding, $padlen, $padbuf);
2078  }
2079  return $this->appendBitstream($bstream, $padding);
2080  }
2081 
2087  protected function mergeBitStream($items) {
2088  $items = $this->convertData($items);
2089  if (!is_array($items)) {
2090  return null;
2091  }
2092  $bstream = array();
2093  foreach ($items as $item) {
2094  $bstream = $this->appendBitstream($bstream, $item['bstream']);
2095  }
2096  return $bstream;
2097  }
2098 
2104  protected function getBitStream($items) {
2105  $bstream = $this->mergeBitStream($items);
2106  return $this->appendPaddingBit($bstream);
2107  }
2108 
2114  protected function getByteStream($items) {
2115  $bstream = $this->getBitStream($items);
2116  return $this->bitstreamToByte($bstream);
2117  }
2118 
2119  // - - - - - - - - - - - - - - - - - - - - - - - - -
2120 
2121  // QRbitstream
2122 
2128  protected function allocate($setLength) {
2129  return array_fill(0, $setLength, 0);
2130  }
2131 
2138  protected function newFromNum($bits, $num) {
2139  $bstream = $this->allocate($bits);
2140  $mask = 1 << ($bits - 1);
2141  for ($i=0; $i<$bits; ++$i) {
2142  if ($num & $mask) {
2143  $bstream[$i] = 1;
2144  } else {
2145  $bstream[$i] = 0;
2146  }
2147  $mask = $mask >> 1;
2148  }
2149  return $bstream;
2150  }
2151 
2158  protected function newFromBytes($size, $data) {
2159  $bstream = $this->allocate($size * 8);
2160  $p=0;
2161  for ($i=0; $i<$size; ++$i) {
2162  $mask = 0x80;
2163  for ($j=0; $j<8; ++$j) {
2164  if ($data[$i] & $mask) {
2165  $bstream[$p] = 1;
2166  } else {
2167  $bstream[$p] = 0;
2168  }
2169  $p++;
2170  $mask = $mask >> 1;
2171  }
2172  }
2173  return $bstream;
2174  }
2175 
2182  protected function appendBitstream($bitstream, $append) {
2183  if ((!is_array($append)) OR (count($append) == 0)) {
2184  return $bitstream;
2185  }
2186  if (count($bitstream) == 0) {
2187  return $append;
2188  }
2189  return array_values(array_merge($bitstream, $append));
2190  }
2191 
2199  protected function appendNum($bitstream, $bits, $num) {
2200  if ($bits == 0) {
2201  return 0;
2202  }
2203  $b = $this->newFromNum($bits, $num);
2204  return $this->appendBitstream($bitstream, $b);
2205  }
2206 
2214  protected function appendBytes($bitstream, $size, $data) {
2215  if ($size == 0) {
2216  return 0;
2217  }
2218  $b = $this->newFromBytes($size, $data);
2219  return $this->appendBitstream($bitstream, $b);
2220  }
2221 
2227  protected function bitstreamToByte($bstream) {
2228  if (is_null($bstream)) {
2229  return null;
2230  }
2231  $size = count($bstream);
2232  if ($size == 0) {
2233  return array();
2234  }
2235  $data = array_fill(0, (int)(($size + 7) / 8), 0);
2236  $bytes = (int)($size / 8);
2237  $p = 0;
2238  for ($i=0; $i<$bytes; $i++) {
2239  $v = 0;
2240  for ($j=0; $j<8; $j++) {
2241  $v = $v << 1;
2242  $v |= $bstream[$p];
2243  $p++;
2244  }
2245  $data[$i] = $v;
2246  }
2247  if ($size & 7) {
2248  $v = 0;
2249  for ($j=0; $j<($size & 7); $j++) {
2250  $v = $v << 1;
2251  $v |= $bstream[$p];
2252  $p++;
2253  }
2254  $data[$bytes] = $v;
2255  }
2256  return $data;
2257  }
2258 
2259  // - - - - - - - - - - - - - - - - - - - - - - - - -
2260 
2261  // QRspec
2262 
2272  protected function qrstrset($srctab, $x, $y, $repl, $replLen=false) {
2273  $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl));
2274  return $srctab;
2275  }
2276 
2283  protected function getDataLength($version, $level) {
2284  return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level];
2285  }
2286 
2293  protected function getECCLength($version, $level){
2294  return $this->capacity[$version][QRCAP_EC][$level];
2295  }
2296 
2302  protected function getWidth($version) {
2303  return $this->capacity[$version][QRCAP_WIDTH];
2304  }
2305 
2311  protected function getRemainder($version) {
2312  return $this->capacity[$version][QRCAP_REMINDER];
2313  }
2314 
2321  protected function getMinimumVersion($size, $level) {
2322  for ($i = 1; $i <= QRSPEC_VERSION_MAX; ++$i) {
2323  $words = ($this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level]);
2324  if ($words >= $size) {
2325  return $i;
2326  }
2327  }
2328  // the size of input data is greater than QR capacity, try to lover the error correction mode
2329  return -1;
2330  }
2331 
2338  protected function lengthIndicator($mode, $version) {
2339  if ($mode == QR_MODE_ST) {
2340  return 0;
2341  }
2342  if ($version <= 9) {
2343  $l = 0;
2344  } elseif ($version <= 26) {
2345  $l = 1;
2346  } else {
2347  $l = 2;
2348  }
2349  return $this->lengthTableBits[$mode][$l];
2350  }
2351 
2358  protected function maximumWords($mode, $version) {
2359  if ($mode == QR_MODE_ST) {
2360  return 3;
2361  }
2362  if ($version <= 9) {
2363  $l = 0;
2364  } else if ($version <= 26) {
2365  $l = 1;
2366  } else {
2367  $l = 2;
2368  }
2369  $bits = $this->lengthTableBits[$mode][$l];
2370  $words = (1 << $bits) - 1;
2371  if ($mode == QR_MODE_KJ) {
2372  $words *= 2; // the number of bytes is required
2373  }
2374  return $words;
2375  }
2376 
2384  protected function getEccSpec($version, $level, $spec) {
2385  if (count($spec) < 5) {
2386  $spec = array(0, 0, 0, 0, 0);
2387  }
2388  $b1 = $this->eccTable[$version][$level][0];
2389  $b2 = $this->eccTable[$version][$level][1];
2390  $data = $this->getDataLength($version, $level);
2391  $ecc = $this->getECCLength($version, $level);
2392  if ($b2 == 0) {
2393  $spec[0] = $b1;
2394  $spec[1] = (int)($data / $b1);
2395  $spec[2] = (int)($ecc / $b1);
2396  $spec[3] = 0;
2397  $spec[4] = 0;
2398  } else {
2399  $spec[0] = $b1;
2400  $spec[1] = (int)($data / ($b1 + $b2));
2401  $spec[2] = (int)($ecc / ($b1 + $b2));
2402  $spec[3] = $b2;
2403  $spec[4] = $spec[1] + 1;
2404  }
2405  return $spec;
2406  }
2407 
2415  protected function putAlignmentMarker($frame, $ox, $oy) {
2416  $finder = array(
2417  "\xa1\xa1\xa1\xa1\xa1",
2418  "\xa1\xa0\xa0\xa0\xa1",
2419  "\xa1\xa0\xa1\xa0\xa1",
2420  "\xa1\xa0\xa0\xa0\xa1",
2421  "\xa1\xa1\xa1\xa1\xa1"
2422  );
2423  $yStart = $oy - 2;
2424  $xStart = $ox - 2;
2425  for ($y=0; $y < 5; $y++) {
2426  $frame = $this->qrstrset($frame, $xStart, $yStart+$y, $finder[$y]);
2427  }
2428  return $frame;
2429  }
2430 
2438  protected function putAlignmentPattern($version, $frame, $width) {
2439  if ($version < 2) {
2440  return $frame;
2441  }
2442  $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0];
2443  if ($d < 0) {
2444  $w = 2;
2445  } else {
2446  $w = (int)(($width - $this->alignmentPattern[$version][0]) / $d + 2);
2447  }
2448  if ($w * $w - 3 == 1) {
2449  $x = $this->alignmentPattern[$version][0];
2450  $y = $this->alignmentPattern[$version][0];
2451  $frame = $this->putAlignmentMarker($frame, $x, $y);
2452  return $frame;
2453  }
2454  $cx = $this->alignmentPattern[$version][0];
2455  $wo = $w - 1;
2456  for ($x=1; $x < $wo; ++$x) {
2457  $frame = $this->putAlignmentMarker($frame, 6, $cx);
2458  $frame = $this->putAlignmentMarker($frame, $cx, 6);
2459  $cx += $d;
2460  }
2461  $cy = $this->alignmentPattern[$version][0];
2462  for ($y=0; $y < $wo; ++$y) {
2463  $cx = $this->alignmentPattern[$version][0];
2464  for ($x=0; $x < $wo; ++$x) {
2465  $frame = $this->putAlignmentMarker($frame, $cx, $cy);
2466  $cx += $d;
2467  }
2468  $cy += $d;
2469  }
2470  return $frame;
2471  }
2472 
2478  protected function getVersionPattern($version) {
2479  if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) {
2480  return 0;
2481  }
2482  return $this->versionPattern[($version - 7)];
2483  }
2484 
2491  protected function getFormatInfo($mask, $level) {
2492  if (($mask < 0) OR ($mask > 7)) {
2493  return 0;
2494  }
2495  if (($level < 0) OR ($level > 3)) {
2496  return 0;
2497  }
2498  return $this->formatInfo[$level][$mask];
2499  }
2500 
2508  protected function putFinderPattern($frame, $ox, $oy) {
2509  $finder = array(
2510  "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
2511  "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2512  "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2513  "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2514  "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2515  "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2516  "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
2517  );
2518  for ($y=0; $y < 7; $y++) {
2519  $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]);
2520  }
2521  return $frame;
2522  }
2523 
2529  protected function createFrame($version) {
2530  $width = $this->capacity[$version][QRCAP_WIDTH];
2531  $frameLine = str_repeat ("\0", $width);
2532  $frame = array_fill(0, $width, $frameLine);
2533  // Finder pattern
2534  $frame = $this->putFinderPattern($frame, 0, 0);
2535  $frame = $this->putFinderPattern($frame, $width - 7, 0);
2536  $frame = $this->putFinderPattern($frame, 0, $width - 7);
2537  // Separator
2538  $yOffset = $width - 7;
2539  for ($y=0; $y < 7; ++$y) {
2540  $frame[$y][7] = "\xc0";
2541  $frame[$y][$width - 8] = "\xc0";
2542  $frame[$yOffset][7] = "\xc0";
2543  ++$yOffset;
2544  }
2545  $setPattern = str_repeat("\xc0", 8);
2546  $frame = $this->qrstrset($frame, 0, 7, $setPattern);
2547  $frame = $this->qrstrset($frame, $width-8, 7, $setPattern);
2548  $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern);
2549  // Format info
2550  $setPattern = str_repeat("\x84", 9);
2551  $frame = $this->qrstrset($frame, 0, 8, $setPattern);
2552  $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8);
2553  $yOffset = $width - 8;
2554  for ($y=0; $y < 8; ++$y,++$yOffset) {
2555  $frame[$y][8] = "\x84";
2556  $frame[$yOffset][8] = "\x84";
2557  }
2558  // Timing pattern
2559  $wo = $width - 15;
2560  for ($i=1; $i < $wo; ++$i) {
2561  $frame[6][7+$i] = chr(0x90 | ($i & 1));
2562  $frame[7+$i][6] = chr(0x90 | ($i & 1));
2563  }
2564  // Alignment pattern
2565  $frame = $this->putAlignmentPattern($version, $frame, $width);
2566  // Version information
2567  if ($version >= 7) {
2568  $vinf = $this->getVersionPattern($version);
2569  $v = $vinf;
2570  for ($x=0; $x<6; ++$x) {
2571  for ($y=0; $y<3; ++$y) {
2572  $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
2573  $v = $v >> 1;
2574  }
2575  }
2576  $v = $vinf;
2577  for ($y=0; $y<6; ++$y) {
2578  for ($x=0; $x<3; ++$x) {
2579  $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
2580  $v = $v >> 1;
2581  }
2582  }
2583  }
2584  // and a little bit...
2585  $frame[$width - 8][8] = "\x81";
2586  return $frame;
2587  }
2588 
2594  protected function newFrame($version) {
2595  if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) {
2596  return NULL;
2597  }
2598  if (!isset($this->frames[$version])) {
2599  $this->frames[$version] = $this->createFrame($version);
2600  }
2601  if (is_null($this->frames[$version])) {
2602  return NULL;
2603  }
2604  return $this->frames[$version];
2605  }
2606 
2612  protected function rsBlockNum($spec) {
2613  return ($spec[0] + $spec[3]);
2614  }
2615 
2621  protected function rsBlockNum1($spec) {
2622  return $spec[0];
2623  }
2624 
2630  protected function rsDataCodes1($spec) {
2631  return $spec[1];
2632  }
2633 
2639  protected function rsEccCodes1($spec) {
2640  return $spec[2];
2641  }
2642 
2648  protected function rsBlockNum2($spec) {
2649  return $spec[3];
2650  }
2651 
2657  protected function rsDataCodes2($spec) {
2658  return $spec[4];
2659  }
2660 
2666  protected function rsEccCodes2($spec) {
2667  return $spec[2];
2668  }
2669 
2675  protected function rsDataLength($spec) {
2676  return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]);
2677  }
2678 
2684  protected function rsEccLength($spec) {
2685  return ($spec[0] + $spec[3]) * $spec[2];
2686  }
2687 
2688  // - - - - - - - - - - - - - - - - - - - - - - - - -
2689 
2690  // QRrs
2691 
2702  protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2703  foreach ($this->rsitems as $rs) {
2704  if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize)
2705  OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($rs['prim'] != $prim)) {
2706  continue;
2707  }
2708  return $rs;
2709  }
2710  $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);
2711  array_unshift($this->rsitems, $rs);
2712  return $rs;
2713  }
2714 
2715  // - - - - - - - - - - - - - - - - - - - - - - - - -
2716 
2717  // QRrsItem
2718 
2725  protected function modnn($rs, $x) {
2726  while ($x >= $rs['nn']) {
2727  $x -= $rs['nn'];
2728  $x = ($x >> $rs['mm']) + ($x & $rs['nn']);
2729  }
2730  return $x;
2731  }
2732 
2743  protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2744  // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2)
2745  $rs = null;
2746  // Check parameter ranges
2747  if (($symsize < 0) OR ($symsize > 8)) {
2748  return $rs;
2749  }
2750  if (($fcr < 0) OR ($fcr >= (1<<$symsize))) {
2751  return $rs;
2752  }
2753  if (($prim <= 0) OR ($prim >= (1<<$symsize))) {
2754  return $rs;
2755  }
2756  if (($nroots < 0) OR ($nroots >= (1<<$symsize))) {
2757  return $rs;
2758  }
2759  if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) {
2760  return $rs;
2761  }
2762  $rs = array();
2763  $rs['mm'] = $symsize;
2764  $rs['nn'] = (1 << $symsize) - 1;
2765  $rs['pad'] = $pad;
2766  $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0);
2767  $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0);
2768  // PHP style macro replacement ;)
2769  $NN =& $rs['nn'];
2770  $A0 =& $NN;
2771  // Generate Galois field lookup tables
2772  $rs['index_of'][0] = $A0; // log(zero) = -inf
2773  $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0
2774  $sr = 1;
2775  for ($i=0; $i<$rs['nn']; ++$i) {
2776  $rs['index_of'][$sr] = $i;
2777  $rs['alpha_to'][$i] = $sr;
2778  $sr <<= 1;
2779  if ($sr & (1 << $symsize)) {
2780  $sr ^= $gfpoly;
2781  }
2782  $sr &= $rs['nn'];
2783  }
2784  if ($sr != 1) {
2785  // field generator polynomial is not primitive!
2786  return NULL;
2787  }
2788  // Form RS code generator polynomial from its roots
2789  $rs['genpoly'] = array_fill(0, ($nroots + 1), 0);
2790  $rs['fcr'] = $fcr;
2791  $rs['prim'] = $prim;
2792  $rs['nroots'] = $nroots;
2793  $rs['gfpoly'] = $gfpoly;
2794  // Find prim-th root of 1, used in decoding
2795  for ($iprim=1; ($iprim % $prim) != 0; $iprim += $rs['nn']) {
2796  ; // intentional empty-body loop!
2797  }
2798  $rs['iprim'] = (int)($iprim / $prim);
2799  $rs['genpoly'][0] = 1;
2800  for ($i = 0,$root=$fcr*$prim; $i < $nroots; $i++, $root += $prim) {
2801  $rs['genpoly'][$i+1] = 1;
2802  // Multiply rs->genpoly[] by @**(root + x)
2803  for ($j = $i; $j > 0; --$j) {
2804  if ($rs['genpoly'][$j] != 0) {
2805  $rs['genpoly'][$j] = $rs['genpoly'][$j-1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)];
2806  } else {
2807  $rs['genpoly'][$j] = $rs['genpoly'][$j-1];
2808  }
2809  }
2810  // rs->genpoly[0] can never be zero
2811  $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)];
2812  }
2813  // convert rs->genpoly[] to index form for quicker encoding
2814  for ($i = 0; $i <= $nroots; ++$i) {
2815  $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]];
2816  }
2817  return $rs;
2818  }
2819 
2827  protected function encode_rs_char($rs, $data, $parity) {
2828  $MM =& $rs['mm']; // bits per symbol
2829  $NN =& $rs['nn']; // the total number of symbols in a RS block
2830  $ALPHA_TO =& $rs['alpha_to']; // the address of an array of NN elements to convert Galois field elements in index (log) form to polynomial form
2831  $INDEX_OF =& $rs['index_of']; // the address of an array of NN elements to convert Galois field elements in polynomial form to index (log) form
2832  $GENPOLY =& $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form
2833  $NROOTS =& $rs['nroots']; // the number of roots in the RS code generator polynomial, which is the same as the number of parity symbols in a block
2834  $FCR =& $rs['fcr']; // first consecutive root, index form
2835  $PRIM =& $rs['prim']; // primitive element, index form
2836  $IPRIM =& $rs['iprim']; // prim-th root of 1, index form
2837  $PAD =& $rs['pad']; // the number of pad symbols in a block
2838  $A0 =& $NN;
2839  $parity = array_fill(0, $NROOTS, 0);
2840  for ($i=0; $i < ($NN - $NROOTS - $PAD); $i++) {
2841  $feedback = $INDEX_OF[$data[$i] ^ $parity[0]];
2842  if ($feedback != $A0) {
2843  // feedback term is non-zero
2844  // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must
2845  // always be for the polynomials constructed by init_rs()
2846  $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback);
2847  for ($j=1; $j < $NROOTS; ++$j) {
2848  $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])];
2849  }
2850  }
2851  // Shift
2852  array_shift($parity);
2853  if ($feedback != $A0) {
2854  array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]);
2855  } else {
2856  array_push($parity, 0);
2857  }
2858  }
2859  return $parity;
2860  }
2861 
2862 } // end QRcode class
2863 
2864 //============================================================+
2865 // END OF FILE
2866 //============================================================+