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[107]1<?php
2//============================================================+
3// File name : qrcode.php
4// Begin : 2010-03-22
5// Last Update : 2010-03-30
6// Version : 1.0.003
7// License : GNU LGPL v.3 (http://www.gnu.org/copyleft/lesser.html)
8// ----------------------------------------------------------------------------
9//
10// This library is free software; you can redistribute it and/or
11// modify it under the terms of the GNU Lesser General Public
12// License as published by the Free Software Foundation; either
13// version 3 of the License, or any later version.
14//
15// This library is distributed in the hope that it will be useful,
16// but WITHOUT ANY WARRANTY; without even the implied warranty of
17// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18// Lesser General Public License for more details.
19//
20// You should have received a copy of the GNU Lesser General Public
21// License along with this library; if not, write to the Free Software
22// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23// or browse http://www.gnu.org/copyleft/lesser.html
24//
25// ----------------------------------------------------------------------------
26//
27// DESCRIPTION :
28//
29// Class to create QR-code arrays for TCPDF class.
30// QR Code symbol is a 2D barcode that can be scanned by
31// handy terminals such as a mobile phone with CCD.
32// The capacity of QR Code is up to 7000 digits or 4000
33// characters, and has high robustness.
34// This class supports QR Code model 2, described in
35// JIS (Japanese Industrial Standards) X0510:2004
36// or ISO/IEC 18004.
37// Currently the following features are not supported:
38// ECI and FNC1 mode, Micro QR Code, QR Code model 1,
39// Structured mode.
40//
41// This class is derived from the following projects:
42// ---------------------------------------------------------
43// "PHP QR Code encoder"
44// License: GNU-LGPLv3
45// Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm>
46// http://phpqrcode.sourceforge.net/
47// https://sourceforge.net/projects/phpqrcode/
48//
49// The "PHP QR Code encoder" is based on
50// "C libqrencode library" (ver. 3.1.1)
51// License: GNU-LGPL 2.1
52// Copyright (C) 2006-2010 by Kentaro Fukuchi
53// http://megaui.net/fukuchi/works/qrencode/index.en.html
54//
55// Reed-Solomon code encoder is written by Phil Karn, KA9Q.
56// Copyright (C) 2002-2006 Phil Karn, KA9Q
57//
58// QR Code is registered trademark of DENSO WAVE INCORPORATED
59// http://www.denso-wave.com/qrcode/index-e.html
60// ---------------------------------------------------------
61//
62// Author: Nicola Asuni
63//
64// (c) Copyright 2010:
65// Nicola Asuni
66// Tecnick.com S.r.l.
67// Via della Pace, 11
68// 09044 Quartucciu (CA)
69// ITALY
70// www.tecnick.com
71// info@tecnick.com
72//============================================================+
73
74/**
75 * Class to create QR-code arrays for TCPDF class.
76 * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
77 * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
78 * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
79 * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
80 *
81 * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
82 * Please read comments on this class source file for full copyright and license information.
83 *
84 * @package com.tecnick.tcpdf
85 * @abstract Class for generating QR-code array for TCPDF.
86 * @author Nicola Asuni
87 * @copyright 2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com
88 * @link http://www.tcpdf.org
89 * @license http://www.gnu.org/copyleft/lesser.html LGPL
90 * @version 1.0.003
91 */
92
93// definitions
94if (!defined('QRCODEDEFS')) {
95
96 /**
97 * Indicate that definitions for this class are set
98 */
99 define('QRCODEDEFS', true);
100
101 // -----------------------------------------------------
102
103 // Encoding modes (characters which can be encoded in QRcode)
104
105 /**
106 * Encoding mode
107 */
108 define('QR_MODE_NL', -1);
109
110 /**
111 * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode.
112 */
113 define('QR_MODE_NM', 0);
114
115 /**
116 * Encoding mode alphanumeric (0-9A-Z $%*+-./:) 45characters. 2 characters are encoded to 11bit length. In theory, 4296 characters or less can be stored in a QRcode.
117 */
118 define('QR_MODE_AN', 1);
119
120 /**
121 * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode.
122 */
123 define('QR_MODE_8B', 2);
124
125 /**
126 * Encoding mode KANJI. A KANJI character (multibyte character) is encoded to 13bit length. In theory, 1817 characters or less can be stored in a QRcode.
127 */
128 define('QR_MODE_KJ', 3);
129
130 /**
131 * Encoding mode STRUCTURED (currently unsupported)
132 */
133 define('QR_MODE_ST', 4);
134
135 // -----------------------------------------------------
136
137 // Levels of error correction.
138 // QRcode has a function of an error correcting for miss reading that white is black.
139 // Error correcting is defined in 4 level as below.
140
141 /**
142 * Error correction level L : About 7% or less errors can be corrected.
143 */
144 define('QR_ECLEVEL_L', 0);
145
146 /**
147 * Error correction level M : About 15% or less errors can be corrected.
148 */
149 define('QR_ECLEVEL_M', 1);
150
151 /**
152 * Error correction level Q : About 25% or less errors can be corrected.
153 */
154 define('QR_ECLEVEL_Q', 2);
155
156 /**
157 * Error correction level H : About 30% or less errors can be corrected.
158 */
159 define('QR_ECLEVEL_H', 3);
160
161 // -----------------------------------------------------
162
163 // Version. Size of QRcode is defined as version.
164 // Version is from 1 to 40.
165 // Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases.
166 // So version 40 is 177*177 matrix.
167
168 /**
169 * Maximum QR Code version.
170 */
171 define('QRSPEC_VERSION_MAX', 40);
172
173 /**
174 * Maximum matrix size for maximum version (version 40 is 177*177 matrix).
175 */
176 define('QRSPEC_WIDTH_MAX', 177);
177
178 // -----------------------------------------------------
179
180 /**
181 * Matrix index to get width from $capacity array.
182 */
183 define('QRCAP_WIDTH', 0);
184
185 /**
186 * Matrix index to get number of words from $capacity array.
187 */
188 define('QRCAP_WORDS', 1);
189
190 /**
191 * Matrix index to get remainder from $capacity array.
192 */
193 define('QRCAP_REMINDER', 2);
194
195 /**
196 * Matrix index to get error correction level from $capacity array.
197 */
198 define('QRCAP_EC', 3);
199
200 // -----------------------------------------------------
201
202 // Structure (currently usupported)
203
204 /**
205 * Number of header bits for structured mode
206 */
207 define('STRUCTURE_HEADER_BITS', 20);
208
209 /**
210 * Max number of symbols for structured mode
211 */
212 define('MAX_STRUCTURED_SYMBOLS', 16);
213
214 // -----------------------------------------------------
215
216 // Masks
217
218 /**
219 * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column)
220 */
221 define('N1', 3);
222
223 /**
224 * Down point base value for case 2 mask pattern (module block of same color)
225 */
226 define('N2', 3);
227
228 /**
229 * Down point base value for case 3 mask pattern (1:1:3:1:1(dark:bright:dark:bright:dark)pattern in a line or a column)
230 */
231 define('N3', 40);
232
233 /**
234 * Down point base value for case 4 mask pattern (ration of dark modules in whole)
235 */
236 define('N4', 10);
237
238 // -----------------------------------------------------
239
240 // Optimization settings
241
242 /**
243 * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code
244 */
245 define('QR_FIND_BEST_MASK', true);
246
247 /**
248 * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly
249 */
250 define('QR_FIND_FROM_RANDOM', 2);
251
252 /**
253 * when QR_FIND_BEST_MASK === false
254 */
255 define('QR_DEFAULT_MASK', 2);
256
257 // -----------------------------------------------------
258
259} // end of definitions
260
261// #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#
262
263if (!class_exists('QRcode', false)) {
264
265 // for compaibility with PHP4
266 if (!function_exists('str_split')) {
267 /**
268 * Convert a string to an array (needed for PHP4 compatibility)
269 * @param string $string The input string.
270 * @param int $split_length Maximum length of the chunk.
271 * @return If the optional split_length parameter is specified, the returned array will be broken down into chunks with each being split_length in length, otherwise each chunk will be one character in length. FALSE is returned if split_length is less than 1. If the split_length length exceeds the length of string , the entire string is returned as the first (and only) array element.
272 */
273 function str_split($string, $split_length=1) {
274 if ((strlen($string) > $split_length) OR (!$split_length)) {
275 do {
276 $c = strlen($string);
277 $parts[] = substr($string, 0, $split_length);
278 $string = substr($string, $split_length);
279 } while ($string !== false);
280 } else {
281 $parts = array($string);
282 }
283 return $parts;
284 }
285 }
286
287 // #####################################################
288
289 /**
290 * Class to create QR-code arrays for TCPDF class.
291 * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
292 * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
293 * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
294 * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
295 *
296 * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
297 * Please read comments on this class source file for full copyright and license information.
298 *
299 * @name QRcode
300 * @package com.tecnick.tcpdf
301 * @abstract Class for generating QR-code array for TCPDF.
302 * @author Nicola Asuni
303 * @copyright 2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com
304 * @link http://www.tcpdf.org
305 * @license http://www.gnu.org/copyleft/lesser.html LGPL
306 * @version 1.0.002
307 */
308 class QRcode {
309
310 /**
311 * @var barcode array to be returned which is readable by TCPDF
312 * @access protected
313 */
314 protected $barcode_array = array();
315
316 /**
317 * @var QR code version. Size of QRcode is defined as version. Version is from 1 to 40. Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases. So version 40 is 177*177 matrix.
318 * @access protected
319 */
320 protected $version = 0;
321
322 /**
323 * @var Levels of error correction. See definitions for possible values.
324 * @access protected
325 */
326 protected $level = QR_ECLEVEL_L;
327
328 /**
329 * @var Encoding mode
330 * @access protected
331 */
332 protected $hint = QR_MODE_8B;
333
334 /**
335 * @var if true the input string will be converted to uppercase
336 * @access protected
337 */
338 protected $casesensitive = true;
339
340 /**
341 * @var structured QR code (not supported yet)
342 * @access protected
343 */
344 protected $structured = 0;
345
346 /**
347 * @var mask data
348 * @access protected
349 */
350 protected $data;
351
352 // FrameFiller
353
354 /**
355 * @var width
356 * @access protected
357 */
358 protected $width;
359
360 /**
361 * @var frame
362 * @access protected
363 */
364 protected $frame;
365
366 /**
367 * @var X position of bit
368 * @access protected
369 */
370 protected $x;
371
372 /**
373 * @var Y position of bit
374 * @access protected
375 */
376 protected $y;
377
378 /**
379 * @var direction
380 * @access protected
381 */
382 protected $dir;
383
384 /**
385 * @var single bit
386 * @access protected
387 */
388 protected $bit;
389
390 // ---- QRrawcode ----
391
392 /**
393 * @var data code
394 * @access protected
395 */
396 protected $datacode = array();
397
398 /**
399 * @var error correction code
400 * @access protected
401 */
402 protected $ecccode = array();
403
404 /**
405 * @var blocks
406 * @access protected
407 */
408 protected $blocks;
409
410 /**
411 * @var Reed-Solomon blocks
412 * @access protected
413 */
414 protected $rsblocks = array(); //of RSblock
415
416 /**
417 * @var counter
418 * @access protected
419 */
420 protected $count;
421
422 /**
423 * @var data length
424 * @access protected
425 */
426 protected $dataLength;
427
428 /**
429 * @var error correction length
430 * @access protected
431 */
432 protected $eccLength;
433
434 /**
435 * @var b1
436 * @access protected
437 */
438 protected $b1;
439
440 // ---- QRmask ----
441
442 /**
443 * @var run length
444 * @access protected
445 */
446 protected $runLength = array();
447
448 // ---- QRsplit ----
449
450 /**
451 * @var input data string
452 * @access protected
453 */
454 protected $dataStr = '';
455
456 /**
457 * @var input items
458 * @access protected
459 */
460 protected $items;
461
462 // Reed-Solomon items
463
464 /**
465 * @var Reed-Solomon items
466 * @access protected
467 */
468 protected $rsitems = array();
469
470 /**
471 * @var array of frames
472 * @access protected
473 */
474 protected $frames = array();
475
476 /**
477 * @var alphabet-numeric convesion table
478 * @access protected
479 */
480 protected $anTable = array(
481 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
482 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
483 36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, //
484 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, //
485 -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, //
486 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, //
487 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
488 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 //
489 );
490
491 /**
492 * @var array Table of the capacity of symbols
493 * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.
494 * @access protected
495 */
496 protected $capacity = array(
497 array( 0, 0, 0, array( 0, 0, 0, 0)), //
498 array( 21, 26, 0, array( 7, 10, 13, 17)), // 1
499 array( 25, 44, 7, array( 10, 16, 22, 28)), //
500 array( 29, 70, 7, array( 15, 26, 36, 44)), //
501 array( 33, 100, 7, array( 20, 36, 52, 64)), //
502 array( 37, 134, 7, array( 26, 48, 72, 88)), // 5
503 array( 41, 172, 7, array( 36, 64, 96, 112)), //
504 array( 45, 196, 0, array( 40, 72, 108, 130)), //
505 array( 49, 242, 0, array( 48, 88, 132, 156)), //
506 array( 53, 292, 0, array( 60, 110, 160, 192)), //
507 array( 57, 346, 0, array( 72, 130, 192, 224)), // 10
508 array( 61, 404, 0, array( 80, 150, 224, 264)), //
509 array( 65, 466, 0, array( 96, 176, 260, 308)), //
510 array( 69, 532, 0, array( 104, 198, 288, 352)), //
511 array( 73, 581, 3, array( 120, 216, 320, 384)), //
512 array( 77, 655, 3, array( 132, 240, 360, 432)), // 15
513 array( 81, 733, 3, array( 144, 280, 408, 480)), //
514 array( 85, 815, 3, array( 168, 308, 448, 532)), //
515 array( 89, 901, 3, array( 180, 338, 504, 588)), //
516 array( 93, 991, 3, array( 196, 364, 546, 650)), //
517 array( 97, 1085, 3, array( 224, 416, 600, 700)), // 20
518 array(101, 1156, 4, array( 224, 442, 644, 750)), //
519 array(105, 1258, 4, array( 252, 476, 690, 816)), //
520 array(109, 1364, 4, array( 270, 504, 750, 900)), //
521 array(113, 1474, 4, array( 300, 560, 810, 960)), //
522 array(117, 1588, 4, array( 312, 588, 870, 1050)), // 25
523 array(121, 1706, 4, array( 336, 644, 952, 1110)), //
524 array(125, 1828, 4, array( 360, 700, 1020, 1200)), //
525 array(129, 1921, 3, array( 390, 728, 1050, 1260)), //
526 array(133, 2051, 3, array( 420, 784, 1140, 1350)), //
527 array(137, 2185, 3, array( 450, 812, 1200, 1440)), // 30
528 array(141, 2323, 3, array( 480, 868, 1290, 1530)), //
529 array(145, 2465, 3, array( 510, 924, 1350, 1620)), //
530 array(149, 2611, 3, array( 540, 980, 1440, 1710)), //
531 array(153, 2761, 3, array( 570, 1036, 1530, 1800)), //
532 array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35
533 array(161, 3034, 0, array( 600, 1120, 1680, 1980)), //
534 array(165, 3196, 0, array( 630, 1204, 1770, 2100)), //
535 array(169, 3362, 0, array( 660, 1260, 1860, 2220)), //
536 array(173, 3532, 0, array( 720, 1316, 1950, 2310)), //
537 array(177, 3706, 0, array( 750, 1372, 2040, 2430)) // 40
538 );
539
540 /**
541 * @var array Length indicator
542 * @access protected
543 */
544 protected $lengthTableBits = array(
545 array(10, 12, 14),
546 array( 9, 11, 13),
547 array( 8, 16, 16),
548 array( 8, 10, 12)
549 );
550
551 /**
552 * @var array Table of the error correction code (Reed-Solomon block)
553 * See Table 12-16 (pp.30-36), JIS X0510:2004.
554 * @access protected
555 */
556 protected $eccTable = array(
557 array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)), //
558 array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1
559 array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), //
560 array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)), //
561 array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)), //
562 array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5
563 array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)), //
564 array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)), //
565 array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)), //
566 array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)), //
567 array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), // 10
568 array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)), //
569 array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)), //
570 array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)), //
571 array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)), //
572 array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), // 15
573 array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)), //
574 array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)), //
575 array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)), //
576 array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)), //
577 array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), // 20
578 array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)), //
579 array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)), //
580 array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)), //
581 array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)), //
582 array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), // 25
583 array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)), //
584 array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)), //
585 array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), //
586 array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)), //
587 array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30
588 array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)), //
589 array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)), //
590 array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)), //
591 array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)), //
592 array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), // 35
593 array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), //
594 array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)), //
595 array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), //
596 array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)), //
597 array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)) // 40
598 );
599
600 /**
601 * @var array Positions of alignment patterns.
602 * This array includes only the second and the third position of the alignment patterns. Rest of them can be calculated from the distance between them.
603 * See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
604 * @access protected
605 */
606 protected $alignmentPattern = array(
607 array( 0, 0),
608 array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5
609 array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10
610 array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15
611 array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20
612 array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25
613 array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30
614 array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35
615 array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58) // 35-40
616 );
617
618 /**
619 * @var array Version information pattern (BCH coded).
620 * See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
621 * size: [QRSPEC_VERSION_MAX - 6]
622 * @access protected
623 */
624 protected $versionPattern = array(
625 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, //
626 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, //
627 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, //
628 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, //
629 0x27541, 0x28c69
630 );
631
632 /**
633 * @var array Format information
634 * @access protected
635 */
636 protected $formatInfo = array(
637 array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), //
638 array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), //
639 array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), //
640 array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b) //
641 );
642
643
644 // -------------------------------------------------
645 // -------------------------------------------------
646
647
648 /**
649 * This is the class constructor.
650 * Creates a QRcode object
651 * @param string $code code to represent using QRcode
652 * @param string $eclevel error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul>
653 * @access public
654 * @since 1.0.000
655 */
656 public function __construct($code, $eclevel = 'L') {
657 $barcode_array = array();
658 if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
659 return false;
660 }
661 // set error correction level
662 $this->level = array_search($eclevel, array('L', 'M', 'Q', 'H'));
663 if ($this->level === false) {
664 $this->level = QR_ECLEVEL_L;
665 }
666 if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) {
667 return false;
668 }
669 if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) {
670 return false;
671 }
672 $this->items = array();
673 $this->encodeString($code);
674 $qrTab = $this->binarize($this->data);
675 $size = count($qrTab);
676 $barcode_array['num_rows'] = $size;
677 $barcode_array['num_cols'] = $size;
678 $barcode_array['bcode'] = array();
679 foreach ($qrTab as $line) {
680 $arrAdd = array();
681 foreach (str_split($line) as $char) {
682 $arrAdd[] = ($char=='1')?1:0;
683 }
684 $barcode_array['bcode'][] = $arrAdd;
685 }
686 $this->barcode_array = $barcode_array;
687 }
688
689 /**
690 * Returns a barcode array which is readable by TCPDF
691 * @return array barcode array readable by TCPDF;
692 * @access public
693 */
694 public function getBarcodeArray() {
695 return $this->barcode_array;
696 }
697
698 /**
699 * Convert the frame in binary form
700 * @param array $frame array to binarize
701 * @return array frame in binary form
702 */
703 protected function binarize($frame) {
704 $len = count($frame);
705 // the frame is square (width = height)
706 foreach ($frame as &$frameLine) {
707 for ($i=0; $i<$len; $i++) {
708 $frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0';
709 }
710 }
711 return $frame;
712 }
713
714 /**
715 * Encode the input string to QR code
716 * @param string $string input string to encode
717 */
718 protected function encodeString($string) {
719 $this->dataStr = $string;
720 if (!$this->casesensitive) {
721 $this->toUpper();
722 }
723 $ret = $this->splitString();
724 if ($ret < 0) {
725 return NULL;
726 }
727 $this->encodeMask(-1);
728 }
729
730 /**
731 * Encode mask
732 * @param int $mask masking mode
733 */
734 protected function encodeMask($mask) {
735 $spec = array(0, 0, 0, 0, 0);
736 $this->datacode = $this->getByteStream($this->items);
737 if (is_null($this->datacode)) {
738 return NULL;
739 }
740 $spec = $this->getEccSpec($this->version, $this->level, $spec);
741 $this->b1 = $this->rsBlockNum1($spec);
742 $this->dataLength = $this->rsDataLength($spec);
743 $this->eccLength = $this->rsEccLength($spec);
744 $this->ecccode = array_fill(0, $this->eccLength, 0);
745 $this->blocks = $this->rsBlockNum($spec);
746 $ret = $this->init($spec);
747 if ($ret < 0) {
748 return NULL;
749 }
750 $this->count = 0;
751 $this->width = $this->getWidth($this->version);
752 $this->frame = $this->newFrame($this->version);
753 $this->x = $this->width - 1;
754 $this->y = $this->width - 1;
755 $this->dir = -1;
756 $this->bit = -1;
757 // inteleaved data and ecc codes
758 for ($i=0; $i < ($this->dataLength + $this->eccLength); $i++) {
759 $code = $this->getCode();
760 $bit = 0x80;
761 for ($j=0; $j<8; $j++) {
762 $addr = $this->getNextPosition();
763 $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0));
764 $bit = $bit >> 1;
765 }
766 }
767 // remainder bits
768 $j = $this->getRemainder($this->version);
769 for ($i=0; $i<$j; $i++) {
770 $addr = $this->getNextPosition();
771 $this->setFrameAt($addr, 0x02);
772 }
773 // masking
774 $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
775 if ($mask < 0) {
776 if (QR_FIND_BEST_MASK) {
777 $masked = $this->mask($this->width, $this->frame, $this->level);
778 } else {
779 $masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level);
780 }
781 } else {
782 $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level);
783 }
784 if ($masked == NULL) {
785 return NULL;
786 }
787 $this->data = $masked;
788 }
789
790 // - - - - - - - - - - - - - - - - - - - - - - - - -
791
792 // FrameFiller
793
794 /**
795 * Set frame value at specified position
796 * @param array $at x,y position
797 * @param int $val value of the character to set
798 */
799 protected function setFrameAt($at, $val) {
800 $this->frame[$at['y']][$at['x']] = chr($val);
801 }
802
803 /**
804 * Get frame value at specified position
805 * @param array $at x,y position
806 * @return value at specified position
807 */
808 protected function getFrameAt($at) {
809 return ord($this->frame[$at['y']][$at['x']]);
810 }
811
812 /**
813 * Return the next frame position
814 * @return array of x,y coordinates
815 */
816 protected function getNextPosition() {
817 do {
818 if ($this->bit == -1) {
819 $this->bit = 0;
820 return array('x'=>$this->x, 'y'=>$this->y);
821 }
822 $x = $this->x;
823 $y = $this->y;
824 $w = $this->width;
825 if ($this->bit == 0) {
826 $x--;
827 $this->bit++;
828 } else {
829 $x++;
830 $y += $this->dir;
831 $this->bit--;
832 }
833 if ($this->dir < 0) {
834 if ($y < 0) {
835 $y = 0;
836 $x -= 2;
837 $this->dir = 1;
838 if ($x == 6) {
839 $x--;
840 $y = 9;
841 }
842 }
843 } else {
844 if ($y == $w) {
845 $y = $w - 1;
846 $x -= 2;
847 $this->dir = -1;
848 if ($x == 6) {
849 $x--;
850 $y -= 8;
851 }
852 }
853 }
854 if (($x < 0) OR ($y < 0)) {
855 return NULL;
856 }
857 $this->x = $x;
858 $this->y = $y;
859 } while(ord($this->frame[$y][$x]) & 0x80);
860 return array('x'=>$x, 'y'=>$y);
861 }
862
863 // - - - - - - - - - - - - - - - - - - - - - - - - -
864
865 // QRrawcode
866
867 /**
868 * Initialize code.
869 * @param array $spec array of ECC specification
870 * @return 0 in case of success, -1 in case of error
871 */
872 protected function init($spec) {
873 $dl = $this->rsDataCodes1($spec);
874 $el = $this->rsEccCodes1($spec);
875 $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
876 $blockNo = 0;
877 $dataPos = 0;
878 $eccPos = 0;
879 $endfor = $this->rsBlockNum1($spec);
880 for ($i=0; $i < $endfor; ++$i) {
881 $ecc = array_slice($this->ecccode, $eccPos);
882 $this->rsblocks[$blockNo] = array();
883 $this->rsblocks[$blockNo]['dataLength'] = $dl;
884 $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
885 $this->rsblocks[$blockNo]['eccLength'] = $el;
886 $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
887 $this->rsblocks[$blockNo]['ecc'] = $ecc;
888 $this->ecccode = array_merge(array_slice($this->ecccode,0, $eccPos), $ecc);
889 $dataPos += $dl;
890 $eccPos += $el;
891 $blockNo++;
892 }
893 if ($this->rsBlockNum2($spec) == 0) {
894 return 0;
895 }
896 $dl = $this->rsDataCodes2($spec);
897 $el = $this->rsEccCodes2($spec);
898 $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
899 if ($rs == NULL) {
900 return -1;
901 }
902 $endfor = $this->rsBlockNum2($spec);
903 for ($i=0; $i < $endfor; ++$i) {
904 $ecc = array_slice($this->ecccode, $eccPos);
905 $this->rsblocks[$blockNo] = array();
906 $this->rsblocks[$blockNo]['dataLength'] = $dl;
907 $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
908 $this->rsblocks[$blockNo]['eccLength'] = $el;
909 $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
910 $this->rsblocks[$blockNo]['ecc'] = $ecc;
911 $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);
912 $dataPos += $dl;
913 $eccPos += $el;
914 $blockNo++;
915 }
916 return 0;
917 }
918
919 /**
920 * Return Reed-Solomon block code.
921 * @return array rsblocks
922 */
923 protected function getCode() {
924 if ($this->count < $this->dataLength) {
925 $row = $this->count % $this->blocks;
926 $col = $this->count / $this->blocks;
927 if ($col >= $this->rsblocks[0]['dataLength']) {
928 $row += $this->b1;
929 }
930 $ret = $this->rsblocks[$row]['data'][$col];
931 } elseif ($this->count < $this->dataLength + $this->eccLength) {
932 $row = ($this->count - $this->dataLength) % $this->blocks;
933 $col = ($this->count - $this->dataLength) / $this->blocks;
934 $ret = $this->rsblocks[$row]['ecc'][$col];
935 } else {
936 return 0;
937 }
938 $this->count++;
939 return $ret;
940 }
941
942 // - - - - - - - - - - - - - - - - - - - - - - - - -
943
944 // QRmask
945
946 /**
947 * Write Format Information on frame and returns the number of black bits
948 * @param int $width frame width
949 * @param array $frame frame
950 * @param array $mask masking mode
951 * @param int $level error correction level
952 * @return int blacks
953 */
954 protected function writeFormatInformation($width, &$frame, $mask, $level) {
955 $blacks = 0;
956 $format = $this->getFormatInfo($mask, $level);
957 for ($i=0; $i<8; ++$i) {
958 if ($format & 1) {
959 $blacks += 2;
960 $v = 0x85;
961 } else {
962 $v = 0x84;
963 }
964 $frame[8][$width - 1 - $i] = chr($v);
965 if ($i < 6) {
966 $frame[$i][8] = chr($v);
967 } else {
968 $frame[$i + 1][8] = chr($v);
969 }
970 $format = $format >> 1;
971 }
972 for ($i=0; $i<7; ++$i) {
973 if ($format & 1) {
974 $blacks += 2;
975 $v = 0x85;
976 } else {
977 $v = 0x84;
978 }
979 $frame[$width - 7 + $i][8] = chr($v);
980 if ($i == 0) {
981 $frame[8][7] = chr($v);
982 } else {
983 $frame[8][6 - $i] = chr($v);
984 }
985 $format = $format >> 1;
986 }
987 return $blacks;
988 }
989
990 /**
991 * mask0
992 * @param int $x X position
993 * @param int $y Y position
994 * @return int mask
995 */
996 protected function mask0($x, $y) {
997 return ($x + $y) & 1;
998 }
999
1000 /**
1001 * mask1
1002 * @param int $x X position
1003 * @param int $y Y position
1004 * @return int mask
1005 */
1006 protected function mask1($x, $y) {
1007 return ($y & 1);
1008 }
1009
1010 /**
1011 * mask2
1012 * @param int $x X position
1013 * @param int $y Y position
1014 * @return int mask
1015 */
1016 protected function mask2($x, $y) {
1017 return ($x % 3);
1018 }
1019
1020 /**
1021 * mask3
1022 * @param int $x X position
1023 * @param int $y Y position
1024 * @return int mask
1025 */
1026 protected function mask3($x, $y) {
1027 return ($x + $y) % 3;
1028 }
1029
1030 /**
1031 * mask4
1032 * @param int $x X position
1033 * @param int $y Y position
1034 * @return int mask
1035 */
1036 protected function mask4($x, $y) {
1037 return (((int)($y / 2)) + ((int)($x / 3))) & 1;
1038 }
1039
1040 /**
1041 * mask5
1042 * @param int $x X position
1043 * @param int $y Y position
1044 * @return int mask
1045 */
1046 protected function mask5($x, $y) {
1047 return (($x * $y) & 1) + ($x * $y) % 3;
1048 }
1049
1050 /**
1051 * mask6
1052 * @param int $x X position
1053 * @param int $y Y position
1054 * @return int mask
1055 */
1056 protected function mask6($x, $y) {
1057 return ((($x * $y) & 1) + ($x * $y) % 3) & 1;
1058 }
1059
1060 /**
1061 * mask7
1062 * @param int $x X position
1063 * @param int $y Y position
1064 * @return int mask
1065 */
1066 protected function mask7($x, $y) {
1067 return ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
1068 }
1069
1070 /**
1071 * Return bitmask
1072 * @param int $maskNo mask number
1073 * @param int $width width
1074 * @param array $frame frame
1075 * @return array bitmask
1076 */
1077 protected function generateMaskNo($maskNo, $width, $frame) {
1078 $bitMask = array_fill(0, $width, array_fill(0, $width, 0));
1079 for ($y=0; $y<$width; ++$y) {
1080 for ($x=0; $x<$width; ++$x) {
1081 if (ord($frame[$y][$x]) & 0x80) {
1082 $bitMask[$y][$x] = 0;
1083 } else {
1084 $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
1085 $bitMask[$y][$x] = ($maskFunc == 0)?1:0;
1086 }
1087 }
1088 }
1089 return $bitMask;
1090 }
1091
1092 /**
1093 * makeMaskNo
1094 * @param int $maskNo
1095 * @param int $width
1096 * @param int $s
1097 * @param int $d
1098 * @param boolean $maskGenOnly
1099 * @return int b
1100 */
1101 protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) {
1102 $b = 0;
1103 $bitMask = array();
1104 $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d);
1105 if ($maskGenOnly) {
1106 return;
1107 }
1108 $d = $s;
1109 for ($y=0; $y<$width; ++$y) {
1110 for ($x=0; $x<$width; ++$x) {
1111 if ($bitMask[$y][$x] == 1) {
1112 $d[$y][$x] = chr(ord($s[$y][$x]) ^ (int)$bitMask[$y][$x]);
1113 }
1114 $b += (int)(ord($d[$y][$x]) & 1);
1115 }
1116 }
1117 return $b;
1118 }
1119
1120 /**
1121 * makeMask
1122 * @param int $width
1123 * @param array $frame
1124 * @param int $maskNo
1125 * @param int $level
1126 * @return array mask
1127 */
1128 protected function makeMask($width, $frame, $maskNo, $level) {
1129 $masked = array_fill(0, $width, str_repeat("\0", $width));
1130 $this->makeMaskNo($maskNo, $width, $frame, $masked);
1131 $this->writeFormatInformation($width, $masked, $maskNo, $level);
1132 return $masked;
1133 }
1134
1135 /**
1136 * calcN1N3
1137 * @param int $length
1138 * @return int demerit
1139 */
1140 protected function calcN1N3($length) {
1141 $demerit = 0;
1142 for ($i=0; $i<$length; ++$i) {
1143 if ($this->runLength[$i] >= 5) {
1144 $demerit += (N1 + ($this->runLength[$i] - 5));
1145 }
1146 if ($i & 1) {
1147 if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) {
1148 $fact = (int)($this->runLength[$i] / 3);
1149 if (($this->runLength[$i-2] == $fact)
1150 AND ($this->runLength[$i-1] == $fact)
1151 AND ($this->runLength[$i+1] == $fact)
1152 AND ($this->runLength[$i+2] == $fact)) {
1153 if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) {
1154 $demerit += N3;
1155 } elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) {
1156 $demerit += N3;
1157 }
1158 }
1159 }
1160 }
1161 }
1162 return $demerit;
1163 }
1164
1165 /**
1166 * evaluateSymbol
1167 * @param int $width
1168 * @param array $frame
1169 * @return int demerit
1170 */
1171 protected function evaluateSymbol($width, $frame) {
1172 $head = 0;
1173 $demerit = 0;
1174 for ($y=0; $y<$width; ++$y) {
1175 $head = 0;
1176 $this->runLength[0] = 1;
1177 $frameY = $frame[$y];
1178 if ($y > 0) {
1179 $frameYM = $frame[$y-1];
1180 }
1181 for ($x=0; $x<$width; ++$x) {
1182 if (($x > 0) AND ($y > 0)) {
1183 $b22 = ord($frameY[$x]) & ord($frameY[$x-1]) & ord($frameYM[$x]) & ord($frameYM[$x-1]);
1184 $w22 = ord($frameY[$x]) | ord($frameY[$x-1]) | ord($frameYM[$x]) | ord($frameYM[$x-1]);
1185 if (($b22 | ($w22 ^ 1)) & 1) {
1186 $demerit += N2;
1187 }
1188 }
1189 if (($x == 0) AND (ord($frameY[$x]) & 1)) {
1190 $this->runLength[0] = -1;
1191 $head = 1;
1192 $this->runLength[$head] = 1;
1193 } elseif ($x > 0) {
1194 if ((ord($frameY[$x]) ^ ord($frameY[$x-1])) & 1) {
1195 $head++;
1196 $this->runLength[$head] = 1;
1197 } else {
1198 $this->runLength[$head]++;
1199 }
1200 }
1201 }
1202 $demerit += $this->calcN1N3($head+1);
1203 }
1204 for ($x=0; $x<$width; ++$x) {
1205 $head = 0;
1206 $this->runLength[0] = 1;
1207 for ($y=0; $y<$width; ++$y) {
1208 if (($y == 0) AND (ord($frame[$y][$x]) & 1)) {
1209 $this->runLength[0] = -1;
1210 $head = 1;
1211 $this->runLength[$head] = 1;
1212 } elseif ($y > 0) {
1213 if ((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) {
1214 $head++;
1215 $this->runLength[$head] = 1;
1216 } else {
1217 $this->runLength[$head]++;
1218 }
1219 }
1220 }
1221 $demerit += $this->calcN1N3($head+1);
1222 }
1223 return $demerit;
1224 }
1225
1226 /**
1227 * mask
1228 * @param int $width
1229 * @param array $frame
1230 * @param int $level
1231 * @return array best mask
1232 */
1233 protected function mask($width, $frame, $level) {
1234 $minDemerit = PHP_INT_MAX;
1235 $bestMaskNum = 0;
1236 $bestMask = array();
1237 $checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7);
1238 if (QR_FIND_FROM_RANDOM !== false) {
1239 $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
1240 for ($i = 0; $i < $howManuOut; ++$i) {
1241 $remPos = rand (0, count($checked_masks)-1);
1242 unset($checked_masks[$remPos]);
1243 $checked_masks = array_values($checked_masks);
1244 }
1245 }
1246 $bestMask = $frame;
1247 foreach ($checked_masks as $i) {
1248 $mask = array_fill(0, $width, str_repeat("\0", $width));
1249 $demerit = 0;
1250 $blacks = 0;
1251 $blacks = $this->makeMaskNo($i, $width, $frame, $mask);
1252 $blacks += $this->writeFormatInformation($width, $mask, $i, $level);
1253 $blacks = (int)(100 * $blacks / ($width * $width));
1254 $demerit = (int)((int)(abs($blacks - 50) / 5) * N4);
1255 $demerit += $this->evaluateSymbol($width, $mask);
1256 if ($demerit < $minDemerit) {
1257 $minDemerit = $demerit;
1258 $bestMask = $mask;
1259 $bestMaskNum = $i;
1260 }
1261 }
1262 return $bestMask;
1263 }
1264
1265 // - - - - - - - - - - - - - - - - - - - - - - - - -
1266
1267 // QRsplit
1268
1269 /**
1270 * Return true if the character at specified position is a number
1271 * @param string $str string
1272 * @param int $pos characted position
1273 * @return boolean true of false
1274 */
1275 protected function isdigitat($str, $pos) {
1276 if ($pos >= strlen($str)) {
1277 return false;
1278 }
1279 return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9')));
1280 }
1281
1282 /**
1283 * Return true if the character at specified position is an alphanumeric character
1284 * @param string $str string
1285 * @param int $pos characted position
1286 * @return boolean true of false
1287 */
1288 protected function isalnumat($str, $pos) {
1289 if ($pos >= strlen($str)) {
1290 return false;
1291 }
1292 return ($this->lookAnTable(ord($str[$pos])) >= 0);
1293 }
1294
1295 /**
1296 * identifyMode
1297 * @param int $pos
1298 * @return int mode
1299 */
1300 protected function identifyMode($pos) {
1301 if ($pos >= strlen($this->dataStr)) {
1302 return QR_MODE_NL;
1303 }
1304 $c = $this->dataStr[$pos];
1305 if ($this->isdigitat($this->dataStr, $pos)) {
1306 return QR_MODE_NM;
1307 } elseif ($this->isalnumat($this->dataStr, $pos)) {
1308 return QR_MODE_AN;
1309 } elseif ($this->hint == QR_MODE_KJ) {
1310 if ($pos+1 < strlen($this->dataStr)) {
1311 $d = $this->dataStr[$pos+1];
1312 $word = (ord($c) << 8) | ord($d);
1313 if (($word >= 0x8140 && $word <= 0x9ffc) OR ($word >= 0xe040 && $word <= 0xebbf)) {
1314 return QR_MODE_KJ;
1315 }
1316 }
1317 }
1318 return QR_MODE_8B;
1319 }
1320
1321 /**
1322 * eatNum
1323 * @return int run
1324 */
1325 protected function eatNum() {
1326 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1327 $p = 0;
1328 while($this->isdigitat($this->dataStr, $p)) {
1329 $p++;
1330 }
1331 $run = $p;
1332 $mode = $this->identifyMode($p);
1333 if ($mode == QR_MODE_8B) {
1334 $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1335 + $this->estimateBitsMode8(1) // + 4 + l8
1336 - $this->estimateBitsMode8($run + 1); // - 4 - l8
1337 if ($dif > 0) {
1338 return $this->eat8();
1339 }
1340 }
1341 if ($mode == QR_MODE_AN) {
1342 $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1343 + $this->estimateBitsModeAn(1) // + 4 + la
1344 - $this->estimateBitsModeAn($run + 1);// - 4 - la
1345 if ($dif > 0) {
1346 return $this->eatAn();
1347 }
1348 }
1349 $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr));
1350 return $run;
1351 }
1352
1353 /**
1354 * eatAn
1355 * @return int run
1356 */
1357 protected function eatAn() {
1358 $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
1359 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1360 $p = 0;
1361 while($this->isalnumat($this->dataStr, $p)) {
1362 if ($this->isdigitat($this->dataStr, $p)) {
1363 $q = $p;
1364 while($this->isdigitat($this->dataStr, $q)) {
1365 $q++;
1366 }
1367 $dif = $this->estimateBitsModeAn($p) // + 4 + la
1368 + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1369 - $this->estimateBitsModeAn($q); // - 4 - la
1370 if ($dif < 0) {
1371 break;
1372 } else {
1373 $p = $q;
1374 }
1375 } else {
1376 $p++;
1377 }
1378 }
1379 $run = $p;
1380 if (!$this->isalnumat($this->dataStr, $p)) {
1381 $dif = $this->estimateBitsModeAn($run) + 4 + $la
1382 + $this->estimateBitsMode8(1) // + 4 + l8
1383 - $this->estimateBitsMode8($run + 1); // - 4 - l8
1384 if ($dif > 0) {
1385 return $this->eat8();
1386 }
1387 }
1388 $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr));
1389 return $run;
1390 }
1391
1392 /**
1393 * eatKanji
1394 * @return int run
1395 */
1396 protected function eatKanji() {
1397 $p = 0;
1398 while($this->identifyMode($p) == QR_MODE_KJ) {
1399 $p += 2;
1400 }
1401 $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr));
1402 return $run;
1403 }
1404
1405 /**
1406 * eat8
1407 * @return int run
1408 */
1409 protected function eat8() {
1410 $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
1411 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1412 $p = 1;
1413 $dataStrLen = strlen($this->dataStr);
1414 while($p < $dataStrLen) {
1415 $mode = $this->identifyMode($p);
1416 if ($mode == QR_MODE_KJ) {
1417 break;
1418 }
1419 if ($mode == QR_MODE_NM) {
1420 $q = $p;
1421 while($this->isdigitat($this->dataStr, $q)) {
1422 $q++;
1423 }
1424 $dif = $this->estimateBitsMode8($p) // + 4 + l8
1425 + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1426 - $this->estimateBitsMode8($q); // - 4 - l8
1427 if ($dif < 0) {
1428 break;
1429 } else {
1430 $p = $q;
1431 }
1432 } elseif ($mode == QR_MODE_AN) {
1433 $q = $p;
1434 while($this->isalnumat($this->dataStr, $q)) {
1435 $q++;
1436 }
1437 $dif = $this->estimateBitsMode8($p) // + 4 + l8
1438 + $this->estimateBitsModeAn($q - $p) + 4 + $la
1439 - $this->estimateBitsMode8($q); // - 4 - l8
1440 if ($dif < 0) {
1441 break;
1442 } else {
1443 $p = $q;
1444 }
1445 } else {
1446 $p++;
1447 }
1448 }
1449 $run = $p;
1450 $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr));
1451 return $run;
1452 }
1453
1454 /**
1455 * splitString
1456 */
1457 protected function splitString() {
1458 while (strlen($this->dataStr) > 0) {
1459 if ($this->dataStr == '') {
1460 return 0;
1461 }
1462 $mode = $this->identifyMode(0);
1463 switch ($mode) {
1464 case QR_MODE_NM: {
1465 $length = $this->eatNum();
1466 break;
1467 }
1468 case QR_MODE_AN: {
1469 $length = $this->eatAn();
1470 break;
1471 }
1472 case QR_MODE_KJ: {
1473 if ($hint == QR_MODE_KJ) {
1474 $length = $this->eatKanji();
1475 } else {
1476 $length = $this->eat8();
1477 }
1478 break;
1479 }
1480 default: {
1481 $length = $this->eat8();
1482 break;
1483 }
1484 }
1485 if ($length == 0) {
1486 return 0;
1487 }
1488 if ($length < 0) {
1489 return -1;
1490 }
1491 $this->dataStr = substr($this->dataStr, $length);
1492 }
1493 }
1494
1495 /**
1496 * toUpper
1497 */
1498 protected function toUpper() {
1499 $stringLen = strlen($this->dataStr);
1500 $p = 0;
1501 while ($p < $stringLen) {
1502 $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint);
1503 if ($mode == QR_MODE_KJ) {
1504 $p += 2;
1505 } else {
1506 if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) {
1507 $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
1508 }
1509 $p++;
1510 }
1511 }
1512 return $this->dataStr;
1513 }
1514
1515 // - - - - - - - - - - - - - - - - - - - - - - - - -
1516
1517 // QRinputItem
1518
1519 /**
1520 * newInputItem
1521 * @param int $mode
1522 * @param int $size
1523 * @param array $data
1524 * @param array $bstream
1525 * @return array input item
1526 */
1527 protected function newInputItem($mode, $size, $data, $bstream=null) {
1528 $setData = array_slice($data, 0, $size);
1529 if (count($setData) < $size) {
1530 $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0));
1531 }
1532 if (!$this->check($mode, $size, $setData)) {
1533 return NULL;
1534 }
1535 $inputitem = array();
1536 $inputitem['mode'] = $mode;
1537 $inputitem['size'] = $size;
1538 $inputitem['data'] = $setData;
1539 $inputitem['bstream'] = $bstream;
1540 return $inputitem;
1541 }
1542
1543 /**
1544 * encodeModeNum
1545 * @param array $inputitem
1546 * @param int $version
1547 * @return array input item
1548 */
1549 protected function encodeModeNum($inputitem, $version) {
1550 $words = (int)($inputitem['size'] / 3);
1551 $inputitem['bstream'] = array();
1552 $val = 0x1;
1553 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1554 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']);
1555 for ($i=0; $i < $words; ++$i) {
1556 $val = (ord($inputitem['data'][$i*3 ]) - ord('0')) * 100;
1557 $val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10;
1558 $val += (ord($inputitem['data'][$i*3+2]) - ord('0'));
1559 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
1560 }
1561 if ($inputitem['size'] - $words * 3 == 1) {
1562 $val = ord($inputitem['data'][$words*3]) - ord('0');
1563 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1564 } elseif (($inputitem['size'] - ($words * 3)) == 2) {
1565 $val = (ord($inputitem['data'][$words*3 ]) - ord('0')) * 10;
1566 $val += (ord($inputitem['data'][$words*3+1]) - ord('0'));
1567 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
1568 }
1569 return $inputitem;
1570 }
1571
1572 /**
1573 * encodeModeAn
1574 * @param array $inputitem
1575 * @param int $version
1576 * @return array input item
1577 */
1578 protected function encodeModeAn($inputitem, $version) {
1579 $words = (int)($inputitem['size'] / 2);
1580 $inputitem['bstream'] = array();
1581 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
1582 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']); //DEBUG
1583 for ($i=0; $i < $words; ++$i) {
1584 $val = (int)$this->lookAnTable(ord($inputitem['data'][$i*2 ])) * 45;
1585 $val += (int)$this->lookAnTable(ord($inputitem['data'][$i*2+1]));
1586 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
1587 }
1588 if ($inputitem['size'] & 1) {
1589 $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)]));
1590 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
1591 }
1592 return $inputitem;
1593 }
1594
1595 /**
1596 * encodeMode8
1597 * @param array $inputitem
1598 * @param int $version
1599 * @return array input item
1600 */
1601 protected function encodeMode8($inputitem, $version) {
1602 $inputitem['bstream'] = array();
1603 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
1604 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']);
1605 for ($i=0; $i < $inputitem['size']; ++$i) {
1606 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i]));
1607 }
1608 return $inputitem;
1609 }
1610
1611 /**
1612 * encodeModeKanji
1613 * @param array $inputitem
1614 * @param int $version
1615 * @return array input item
1616 */
1617 protected function encodeModeKanji($inputitem, $version) {
1618 $inputitem['bstream'] = array();
1619 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
1620 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2));
1621 for ($i=0; $i<$inputitem['size']; $i+=2) {
1622 $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]);
1623 if ($val <= 0x9ffc) {
1624 $val -= 0x8140;
1625 } else {
1626 $val -= 0xc140;
1627 }
1628 $h = ($val >> 8) * 0xc0;
1629 $val = ($val & 0xff) + $h;
1630 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
1631 }
1632 return $inputitem;
1633 }
1634
1635 /**
1636 * encodeModeStructure
1637 * @param array $inputitem
1638 * @return array input item
1639 */
1640 protected function encodeModeStructure($inputitem) {
1641 $inputitem['bstream'] = array();
1642 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
1643 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1);
1644 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1);
1645 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2]));
1646 return $inputitem;
1647 }
1648
1649 /**
1650 * encodeBitStream
1651 * @param array $inputitem
1652 * @param int $version
1653 * @return array input item
1654 */
1655 protected function encodeBitStream($inputitem, $version) {
1656 $inputitem['bstream'] = array();
1657 $words = $this->maximumWords($inputitem['mode'], $version);
1658 if ($inputitem['size'] > $words) {
1659 $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);
1660 $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words));
1661 $st1 = $this->encodeBitStream($st1, $version);
1662 $st2 = $this->encodeBitStream($st2, $version);
1663 $inputitem['bstream'] = array();
1664 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);
1665 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
1666 } else {
1667 switch($inputitem['mode']) {
1668 case QR_MODE_NM: {
1669 $inputitem = $this->encodeModeNum($inputitem, $version);
1670 break;
1671 }
1672 case QR_MODE_AN: {
1673 $inputitem = $this->encodeModeAn($inputitem, $version);
1674 break;
1675 }
1676 case QR_MODE_8B: {
1677 $inputitem = $this->encodeMode8($inputitem, $version);
1678 break;
1679 }
1680 case QR_MODE_KJ: {
1681 $inputitem = $this->encodeModeKanji($inputitem, $version);
1682 break;
1683 }
1684 case QR_MODE_ST: {
1685 $inputitem = $this->encodeModeStructure($inputitem);
1686 break;
1687 }
1688 default: {
1689 break;
1690 }
1691 }
1692 }
1693 return $inputitem;
1694 }
1695
1696 // - - - - - - - - - - - - - - - - - - - - - - - - -
1697
1698 // QRinput
1699
1700 /**
1701 * Append data to an input object.
1702 * The data is copied and appended to the input object.
1703 * @param array items input items
1704 * @param int $mode encoding mode.
1705 * @param int $size size of data (byte).
1706 * @param array $data array of input data.
1707 * @return items
1708 *
1709 */
1710 protected function appendNewInputItem($items, $mode, $size, $data) {
1711 $items[] = $this->newInputItem($mode, $size, $data);
1712 return $items;
1713 }
1714
1715 /**
1716 * insertStructuredAppendHeader
1717 * @param array $items
1718 * @param int $size
1719 * @param int $index
1720 * @param int $parity
1721 * @return array items
1722 */
1723 protected function insertStructuredAppendHeader($items, $size, $index, $parity) {
1724 if ($size > MAX_STRUCTURED_SYMBOLS) {
1725 return -1;
1726 }
1727 if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) {
1728 return -1;
1729 }
1730 $buf = array($size, $index, $parity);
1731 $entry = $this->newInputItem(QR_MODE_ST, 3, buf);
1732 array_unshift($items, $entry);
1733 return $items;
1734 }
1735
1736 /**
1737 * calcParity
1738 * @param array $items
1739 * @return int parity
1740 */
1741 protected function calcParity($items) {
1742 $parity = 0;
1743 foreach ($items as $item) {
1744 if ($item['mode'] != QR_MODE_ST) {
1745 for ($i=$item['size']-1; $i>=0; --$i) {
1746 $parity ^= $item['data'][$i];
1747 }
1748 }
1749 }
1750 return $parity;
1751 }
1752
1753 /**
1754 * checkModeNum
1755 * @param int $size
1756 * @param array $data
1757 * @return boolean true or false
1758 */
1759 protected function checkModeNum($size, $data) {
1760 for ($i=0; $i<$size; ++$i) {
1761 if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){
1762 return false;
1763 }
1764 }
1765 return true;
1766 }
1767
1768 /**
1769 * estimateBitsModeNum
1770 * @param int $size
1771 * @return int number of bits
1772 */
1773 protected function estimateBitsModeNum($size) {
1774 $w = (int)$size / 3;
1775 $bits = $w * 10;
1776 switch($size - $w * 3) {
1777 case 1: {
1778 $bits += 4;
1779 break;
1780 }
1781 case 2: {
1782 $bits += 7;
1783 break;
1784 }
1785 default: {
1786 break;
1787 }
1788 }
1789 return $bits;
1790 }
1791
1792 /**
1793 * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19).
1794 * @param int $c character value
1795 * @return value
1796 */
1797 protected function lookAnTable($c) {
1798 return (($c > 127)?-1:$this->anTable[$c]);
1799 }
1800
1801 /**
1802 * checkModeAn
1803 * @param int $size
1804 * @param array $data
1805 * @return boolean true or false
1806 */
1807 protected function checkModeAn($size, $data) {
1808 for ($i=0; $i<$size; ++$i) {
1809 if ($this->lookAnTable(ord($data[$i])) == -1) {
1810 return false;
1811 }
1812 }
1813 return true;
1814 }
1815
1816 /**
1817 * estimateBitsModeAn
1818 * @param int $size
1819 * @return int number of bits
1820 */
1821 protected function estimateBitsModeAn($size) {
1822 $w = (int)($size / 2);
1823 $bits = $w * 11;
1824 if ($size & 1) {
1825 $bits += 6;
1826 }
1827 return $bits;
1828 }
1829
1830 /**
1831 * estimateBitsMode8
1832 * @param int $size
1833 * @return int number of bits
1834 */
1835 protected function estimateBitsMode8($size) {
1836 return $size * 8;
1837 }
1838
1839 /**
1840 * estimateBitsModeKanji
1841 * @param int $size
1842 * @return int number of bits
1843 */
1844 protected function estimateBitsModeKanji($size) {
1845 return (int)(($size / 2) * 13);
1846 }
1847
1848 /**
1849 * checkModeKanji
1850 * @param int $size
1851 * @param array $data
1852 * @return boolean true or false
1853 */
1854 protected function checkModeKanji($size, $data) {
1855 if ($size & 1) {
1856 return false;
1857 }
1858 for ($i=0; $i<$size; $i+=2) {
1859 $val = (ord($data[$i]) << 8) | ord($data[$i+1]);
1860 if (($val < 0x8140) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) {
1861 return false;
1862 }
1863 }
1864 return true;
1865 }
1866
1867 /**
1868 * Validate the input data.
1869 * @param int $mode encoding mode.
1870 * @param int $size size of data (byte).
1871 * @param array data data to validate
1872 * @return boolean true in case of valid data, false otherwise
1873 */
1874 protected function check($mode, $size, $data) {
1875 if ($size <= 0) {
1876 return false;
1877 }
1878 switch($mode) {
1879 case QR_MODE_NM: {
1880 return $this->checkModeNum($size, $data);
1881 }
1882 case QR_MODE_AN: {
1883 return $this->checkModeAn($size, $data);
1884 }
1885 case QR_MODE_KJ: {
1886 return $this->checkModeKanji($size, $data);
1887 }
1888 case QR_MODE_8B: {
1889 return true;
1890 }
1891 case QR_MODE_ST: {
1892 return true;
1893 }
1894 default: {
1895 break;
1896 }
1897 }
1898 return false;
1899 }
1900
1901 /**
1902 * estimateBitStreamSize
1903 * @param array $items
1904 * @param int $version
1905 * @return int bits
1906 */
1907 protected function estimateBitStreamSize($items, $version) {
1908 $bits = 0;
1909 if ($version == 0) {
1910 $version = 1;
1911 }
1912 foreach ($items as $item) {
1913 switch($item['mode']) {
1914 case QR_MODE_NM: {
1915 $bits = $this->estimateBitsModeNum($item['size']);
1916 break;
1917 }
1918 case QR_MODE_AN: {
1919 $bits = $this->estimateBitsModeAn($item['size']);
1920 break;
1921 }
1922 case QR_MODE_8B: {
1923 $bits = $this->estimateBitsMode8($item['size']);
1924 break;
1925 }
1926 case QR_MODE_KJ: {
1927 $bits = $this->estimateBitsModeKanji($item['size']);
1928 break;
1929 }
1930 case QR_MODE_ST: {
1931 return STRUCTURE_HEADER_BITS;
1932 }
1933 default: {
1934 return 0;
1935 }
1936 }
1937 $l = $this->lengthIndicator($item['mode'], $version);
1938 $m = 1 << $l;
1939 $num = (int)(($item['size'] + $m - 1) / $m);
1940 $bits += $num * (4 + $l);
1941 }
1942 return $bits;
1943 }
1944
1945 /**
1946 * estimateVersion
1947 * @param array $items
1948 * @return int version
1949 */
1950 protected function estimateVersion($items) {
1951 $version = 0;
1952 $prev = 0;
1953 do {
1954 $prev = $version;
1955 $bits = $this->estimateBitStreamSize($items, $prev);
1956 $version = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
1957 if ($version < 0) {
1958 return -1;
1959 }
1960 } while ($version > $prev);
1961 return $version;
1962 }
1963
1964 /**
1965 * lengthOfCode
1966 * @param int $mode
1967 * @param int $version
1968 * @param int $bits
1969 * @return int size
1970 */
1971 protected function lengthOfCode($mode, $version, $bits) {
1972 $payload = $bits - 4 - $this->lengthIndicator($mode, $version);
1973 switch($mode) {
1974 case QR_MODE_NM: {
1975 $chunks = (int)($payload / 10);
1976 $remain = $payload - $chunks * 10;
1977 $size = $chunks * 3;
1978 if ($remain >= 7) {
1979 $size += 2;
1980 } elseif ($remain >= 4) {
1981 $size += 1;
1982 }
1983 break;
1984 }
1985 case QR_MODE_AN: {
1986 $chunks = (int)($payload / 11);
1987 $remain = $payload - $chunks * 11;
1988 $size = $chunks * 2;
1989 if ($remain >= 6) {
1990 ++$size;
1991 }
1992 break;
1993 }
1994 case QR_MODE_8B: {
1995 $size = (int)($payload / 8);
1996 break;
1997 }
1998 case QR_MODE_KJ: {
1999 $size = (int)(($payload / 13) * 2);
2000 break;
2001 }
2002 case QR_MODE_ST: {
2003 $size = (int)($payload / 8);
2004 break;
2005 }
2006 default: {
2007 $size = 0;
2008 break;
2009 }
2010 }
2011 $maxsize = $this->maximumWords($mode, $version);
2012 if ($size < 0) {
2013 $size = 0;
2014 }
2015 if ($size > $maxsize) {
2016 $size = $maxsize;
2017 }
2018 return $size;
2019 }
2020
2021 /**
2022 * createBitStream
2023 * @param array $items
2024 * @return array of items and total bits
2025 */
2026 protected function createBitStream($items) {
2027 $total = 0;
2028 foreach ($items as $key => $item) {
2029 $items[$key] = $this->encodeBitStream($item, $this->version);
2030 $bits = count($items[$key]['bstream']);
2031 $total += $bits;
2032 }
2033 return array($items, $total);
2034 }
2035
2036 /**
2037 * convertData
2038 * @param array $items
2039 * @return array items
2040 */
2041 protected function convertData($items) {
2042 $ver = $this->estimateVersion($items);
2043 if ($ver > $this->version) {
2044 $this->version = $ver;
2045 }
2046 for (;;) {
2047 $cbs = $this->createBitStream($items);
2048 $items = $cbs[0];
2049 $bits = $cbs[1];
2050 if ($bits < 0) {
2051 return -1;
2052 }
2053 $ver = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
2054 if ($ver < 0) {
2055 return -1;
2056 } elseif ($ver > $this->version) {
2057 $this->version = $ver;
2058 } else {
2059 break;
2060 }
2061 }
2062 return $items;
2063 }
2064
2065 /**
2066 * Append Padding Bit to bitstream
2067 * @param array $bstream
2068 * @return array bitstream
2069 */
2070 protected function appendPaddingBit($bstream) {
2071 $bits = count($bstream);
2072 $maxwords = $this->getDataLength($this->version, $this->level);
2073 $maxbits = $maxwords * 8;
2074 if ($maxbits == $bits) {
2075 return 0;
2076 }
2077 if ($maxbits - $bits < 5) {
2078 return $this->appendNum($bstream, $maxbits - $bits, 0);
2079 }
2080 $bits += 4;
2081 $words = (int)(($bits + 7) / 8);
2082 $padding = array();
2083 $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
2084 $padlen = $maxwords - $words;
2085 if ($padlen > 0) {
2086 $padbuf = array();
2087 for ($i=0; $i<$padlen; ++$i) {
2088 $padbuf[$i] = ($i&1)?0x11:0xec;
2089 }
2090 $padding = $this->appendBytes($padding, $padlen, $padbuf);
2091 }
2092 return $this->appendBitstream($bstream, $padding);
2093 }
2094
2095 /**
2096 * mergeBitStream
2097 * @param array $bstream
2098 * @return array bitstream
2099 */
2100 protected function mergeBitStream($items) {
2101 $items = $this->convertData($items);
2102 $bstream = array();
2103 foreach ($items as $item) {
2104 $bstream = $this->appendBitstream($bstream, $item['bstream']);
2105 }
2106 return $bstream;
2107 }
2108
2109 /**
2110 * Returns a stream of bits.
2111 * @param int $items
2112 * @return array padded merged byte stream
2113 */
2114 protected function getBitStream($items) {
2115 $bstream = $this->mergeBitStream($items);
2116 return $this->appendPaddingBit($bstream);
2117 }
2118
2119 /**
2120 * Pack all bit streams padding bits into a byte array.
2121 * @param int $items
2122 * @return array padded merged byte stream
2123 */
2124 protected function getByteStream($items) {
2125 $bstream = $this->getBitStream($items);
2126 return $this->bitstreamToByte($bstream);
2127 }
2128
2129 // - - - - - - - - - - - - - - - - - - - - - - - - -
2130
2131 // QRbitstream
2132
2133 /**
2134 * Return an array with zeros
2135 * @param int $setLength array size
2136 * @return array
2137 */
2138 protected function allocate($setLength) {
2139 return array_fill(0, $setLength, 0);
2140 }
2141
2142 /**
2143 * Return new bitstream from number
2144 * @param int $bits number of bits
2145 * @param int $num number
2146 * @return array bitstream
2147 */
2148 protected function newFromNum($bits, $num) {
2149 $bstream = $this->allocate($bits);
2150 $mask = 1 << ($bits - 1);
2151 for ($i=0; $i<$bits; ++$i) {
2152 if ($num & $mask) {
2153 $bstream[$i] = 1;
2154 } else {
2155 $bstream[$i] = 0;
2156 }
2157 $mask = $mask >> 1;
2158 }
2159 return $bstream;
2160 }
2161
2162 /**
2163 * Return new bitstream from bytes
2164 * @param int $size size
2165 * @param array $data bytes
2166 * @return array bitstream
2167 */
2168 protected function newFromBytes($size, $data) {
2169 $bstream = $this->allocate($size * 8);
2170 $p=0;
2171 for ($i=0; $i<$size; ++$i) {
2172 $mask = 0x80;
2173 for ($j=0; $j<8; ++$j) {
2174 if ($data[$i] & $mask) {
2175 $bstream[$p] = 1;
2176 } else {
2177 $bstream[$p] = 0;
2178 }
2179 $p++;
2180 $mask = $mask >> 1;
2181 }
2182 }
2183 return $bstream;
2184 }
2185
2186 /**
2187 * Append one bitstream to another
2188 * @param array $bitstream original bitstream
2189 * @param array $append bitstream to append
2190 * @return array bitstream
2191 */
2192 protected function appendBitstream($bitstream, $append) {
2193 if ((!is_array($append)) OR (count($append) == 0)) {
2194 return $bitstream;
2195 }
2196 if (count($bitstream) == 0) {
2197 return $append;
2198 }
2199 return array_values(array_merge($bitstream, $append));
2200 }
2201
2202 /**
2203 * Append one bitstream created from number to another
2204 * @param array $bitstream original bitstream
2205 * @param int $bits number of bits
2206 * @param int $num number
2207 * @return array bitstream
2208 */
2209 protected function appendNum($bitstream, $bits, $num) {
2210 if ($bits == 0) {
2211 return 0;
2212 }
2213 $b = $this->newFromNum($bits, $num);
2214 return $this->appendBitstream($bitstream, $b);
2215 }
2216
2217 /**
2218 * Append one bitstream created from bytes to another
2219 * @param array $bitstream original bitstream
2220 * @param int $size size
2221 * @param array $data bytes
2222 * @return array bitstream
2223 */
2224 protected function appendBytes($bitstream, $size, $data) {
2225 if ($size == 0) {
2226 return 0;
2227 }
2228 $b = $this->newFromBytes($size, $data);
2229 return $this->appendBitstream($bitstream, $b);
2230 }
2231
2232 /**
2233 * Convert bitstream to bytes
2234 * @param array $bitstream original bitstream
2235 * @return array of bytes
2236 */
2237 protected function bitstreamToByte($bstream) {
2238 $size = count($bstream);
2239 if ($size == 0) {
2240 return array();
2241 }
2242 $data = array_fill(0, (int)(($size + 7) / 8), 0);
2243 $bytes = (int)($size / 8);
2244 $p = 0;
2245 for ($i=0; $i<$bytes; $i++) {
2246 $v = 0;
2247 for ($j=0; $j<8; $j++) {
2248 $v = $v << 1;
2249 $v |= $bstream[$p];
2250 $p++;
2251 }
2252 $data[$i] = $v;
2253 }
2254 if ($size & 7) {
2255 $v = 0;
2256 for ($j=0; $j<($size & 7); $j++) {
2257 $v = $v << 1;
2258 $v |= $bstream[$p];
2259 $p++;
2260 }
2261 $data[$bytes] = $v;
2262 }
2263 return $data;
2264 }
2265
2266 // - - - - - - - - - - - - - - - - - - - - - - - - -
2267
2268 // QRspec
2269
2270 /**
2271 * Replace a value on the array at the specified position
2272 * @param array $srctab
2273 * @param int $x X position
2274 * @param int $y Y position
2275 * @param string $repl value to replace
2276 * @param int $replLen length of the repl string
2277 * @return array srctab
2278 */
2279 protected function qrstrset($srctab, $x, $y, $repl, $replLen=false) {
2280 $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl));
2281 return $srctab;
2282 }
2283
2284 /**
2285 * Return maximum data code length (bytes) for the version.
2286 * @param int $version version
2287 * @param int $level error correction level
2288 * @return int maximum size (bytes)
2289 */
2290 protected function getDataLength($version, $level) {
2291 return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level];
2292 }
2293
2294 /**
2295 * Return maximum error correction code length (bytes) for the version.
2296 * @param int $version version
2297 * @param int $level error correction level
2298 * @return int ECC size (bytes)
2299 */
2300 protected function getECCLength($version, $level){
2301 return $this->capacity[$version][QRCAP_EC][$level];
2302 }
2303
2304 /**
2305 * Return the width of the symbol for the version.
2306 * @param int $version version
2307 * @return int width
2308 */
2309 protected function getWidth($version) {
2310 return $this->capacity[$version][QRCAP_WIDTH];
2311 }
2312
2313 /**
2314 * Return the numer of remainder bits.
2315 * @param int $version version
2316 * @return int number of remainder bits
2317 */
2318 protected function getRemainder($version) {
2319 return $this->capacity[$version][QRCAP_REMINDER];
2320 }
2321
2322 /**
2323 * Return a version number that satisfies the input code length.
2324 * @param int $size input code length (byte)
2325 * @param int $level error correction level
2326 * @return int version number
2327 */
2328 protected function getMinimumVersion($size, $level) {
2329 for ($i=1; $i <= QRSPEC_VERSION_MAX; ++$i) {
2330 $words = $this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level];
2331 if ($words >= $size) {
2332 return $i;
2333 }
2334 }
2335 return -1;
2336 }
2337
2338 /**
2339 * Return the size of length indicator for the mode and version.
2340 * @param int $mode encoding mode
2341 * @param int $version version
2342 * @return int the size of the appropriate length indicator (bits).
2343 */
2344 protected function lengthIndicator($mode, $version) {
2345 if ($mode == QR_MODE_ST) {
2346 return 0;
2347 }
2348 if ($version <= 9) {
2349 $l = 0;
2350 } elseif ($version <= 26) {
2351 $l = 1;
2352 } else {
2353 $l = 2;
2354 }
2355 return $this->lengthTableBits[$mode][$l];
2356 }
2357
2358 /**
2359 * Return the maximum length for the mode and version.
2360 * @param int $mode encoding mode
2361 * @param int $version version
2362 * @return int the maximum length (bytes)
2363 */
2364 protected function maximumWords($mode, $version) {
2365 if ($mode == QR_MODE_ST) {
2366 return 3;
2367 }
2368 if ($version <= 9) {
2369 $l = 0;
2370 } else if ($version <= 26) {
2371 $l = 1;
2372 } else {
2373 $l = 2;
2374 }
2375 $bits = $this->lengthTableBits[$mode][$l];
2376 $words = (1 << $bits) - 1;
2377 if ($mode == QR_MODE_KJ) {
2378 $words *= 2; // the number of bytes is required
2379 }
2380 return $words;
2381 }
2382
2383 /**
2384 * Return an array of ECC specification.
2385 * @param int $version version
2386 * @param int $level error correction level
2387 * @param array $spec an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code}
2388 * @return array spec
2389 */
2390 protected function getEccSpec($version, $level, $spec) {
2391 if (count($spec) < 5) {
2392 $spec = array(0, 0, 0, 0, 0);
2393 }
2394 $b1 = $this->eccTable[$version][$level][0];
2395 $b2 = $this->eccTable[$version][$level][1];
2396 $data = $this->getDataLength($version, $level);
2397 $ecc = $this->getECCLength($version, $level);
2398 if ($b2 == 0) {
2399 $spec[0] = $b1;
2400 $spec[1] = (int)($data / $b1);
2401 $spec[2] = (int)($ecc / $b1);
2402 $spec[3] = 0;
2403 $spec[4] = 0;
2404 } else {
2405 $spec[0] = $b1;
2406 $spec[1] = (int)($data / ($b1 + $b2));
2407 $spec[2] = (int)($ecc / ($b1 + $b2));
2408 $spec[3] = $b2;
2409 $spec[4] = $spec[1] + 1;
2410 }
2411 return $spec;
2412 }
2413
2414 /**
2415 * Put an alignment marker.
2416 * @param array $frame frame
2417 * @param int $width width
2418 * @param int $ox X center coordinate of the pattern
2419 * @param int $oy Y center coordinate of the pattern
2420 * @return array frame
2421 */
2422 protected function putAlignmentMarker($frame, $ox, $oy) {
2423 $finder = array(
2424 "\xa1\xa1\xa1\xa1\xa1",
2425 "\xa1\xa0\xa0\xa0\xa1",
2426 "\xa1\xa0\xa1\xa0\xa1",
2427 "\xa1\xa0\xa0\xa0\xa1",
2428 "\xa1\xa1\xa1\xa1\xa1"
2429 );
2430 $yStart = $oy - 2;
2431 $xStart = $ox - 2;
2432 for ($y=0; $y < 5; $y++) {
2433 $frame = $this->qrstrset($frame, $xStart, $yStart+$y, $finder[$y]);
2434 }
2435 return $frame;
2436 }
2437
2438 /**
2439 * Put an alignment pattern.
2440 * @param int $version version
2441 * @param array $fram frame
2442 * @param int $width width
2443 * @return array frame
2444 */
2445 protected function putAlignmentPattern($version, $frame, $width) {
2446 if ($version < 2) {
2447 return $frame;
2448 }
2449 $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0];
2450 if ($d < 0) {
2451 $w = 2;
2452 } else {
2453 $w = (int)(($width - $this->alignmentPattern[$version][0]) / $d + 2);
2454 }
2455 if ($w * $w - 3 == 1) {
2456 $x = $this->alignmentPattern[$version][0];
2457 $y = $this->alignmentPattern[$version][0];
2458 $frame = $this->putAlignmentMarker($frame, $x, $y);
2459 return $frame;
2460 }
2461 $cx = $this->alignmentPattern[$version][0];
2462 $wo = $w - 1;
2463 for ($x=1; $x < $wo; ++$x) {
2464 $frame = $this->putAlignmentMarker($frame, 6, $cx);
2465 $frame = $this->putAlignmentMarker($frame, $cx, 6);
2466 $cx += $d;
2467 }
2468 $cy = $this->alignmentPattern[$version][0];
2469 for ($y=0; $y < $wo; ++$y) {
2470 $cx = $this->alignmentPattern[$version][0];
2471 for ($x=0; $x < $wo; ++$x) {
2472 $frame = $this->putAlignmentMarker($frame, $cx, $cy);
2473 $cx += $d;
2474 }
2475 $cy += $d;
2476 }
2477 return $frame;
2478 }
2479
2480 /**
2481 * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits.
2482 * @param int $version version
2483 * @return BCH encoded version information pattern
2484 */
2485 protected function getVersionPattern($version) {
2486 if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) {
2487 return 0;
2488 }
2489 return $this->versionPattern[($version - 7)];
2490 }
2491
2492 /**
2493 * Return BCH encoded format information pattern.
2494 * @param array $mask
2495 * @param int $level error correction level
2496 * @return BCH encoded format information pattern
2497 */
2498 protected function getFormatInfo($mask, $level) {
2499 if (($mask < 0) OR ($mask > 7)) {
2500 return 0;
2501 }
2502 if (($level < 0) OR ($level > 3)) {
2503 return 0;
2504 }
2505 return $this->formatInfo[$level][$mask];
2506 }
2507
2508 /**
2509 * Put a finder pattern.
2510 * @param array $frame frame
2511 * @param int $width width
2512 * @param int $ox X center coordinate of the pattern
2513 * @param int $oy Y center coordinate of the pattern
2514 * @return array frame
2515 */
2516 protected function putFinderPattern($frame, $ox, $oy) {
2517 $finder = array(
2518 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
2519 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2520 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2521 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2522 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2523 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2524 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
2525 );
2526 for ($y=0; $y < 7; $y++) {
2527 $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]);
2528 }
2529 return $frame;
2530 }
2531
2532 /**
2533 * Return a copy of initialized frame.
2534 * @param int $version version
2535 * @return Array of unsigned char.
2536 */
2537 protected function createFrame($version) {
2538 $width = $this->capacity[$version][QRCAP_WIDTH];
2539 $frameLine = str_repeat ("\0", $width);
2540 $frame = array_fill(0, $width, $frameLine);
2541 // Finder pattern
2542 $frame = $this->putFinderPattern($frame, 0, 0);
2543 $frame = $this->putFinderPattern($frame, $width - 7, 0);
2544 $frame = $this->putFinderPattern($frame, 0, $width - 7);
2545 // Separator
2546 $yOffset = $width - 7;
2547 for ($y=0; $y < 7; ++$y) {
2548 $frame[$y][7] = "\xc0";
2549 $frame[$y][$width - 8] = "\xc0";
2550 $frame[$yOffset][7] = "\xc0";
2551 ++$yOffset;
2552 }
2553 $setPattern = str_repeat("\xc0", 8);
2554 $frame = $this->qrstrset($frame, 0, 7, $setPattern);
2555 $frame = $this->qrstrset($frame, $width-8, 7, $setPattern);
2556 $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern);
2557 // Format info
2558 $setPattern = str_repeat("\x84", 9);
2559 $frame = $this->qrstrset($frame, 0, 8, $setPattern);
2560 $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8);
2561 $yOffset = $width - 8;
2562 for ($y=0; $y < 8; ++$y,++$yOffset) {
2563 $frame[$y][8] = "\x84";
2564 $frame[$yOffset][8] = "\x84";
2565 }
2566 // Timing pattern
2567 $wo = $width - 15;
2568 for ($i=1; $i < $wo; ++$i) {
2569 $frame[6][7+$i] = chr(0x90 | ($i & 1));
2570 $frame[7+$i][6] = chr(0x90 | ($i & 1));
2571 }
2572 // Alignment pattern
2573 $frame = $this->putAlignmentPattern($version, $frame, $width);
2574 // Version information
2575 if ($version >= 7) {
2576 $vinf = $this->getVersionPattern($version);
2577 $v = $vinf;
2578 for ($x=0; $x<6; ++$x) {
2579 for ($y=0; $y<3; ++$y) {
2580 $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
2581 $v = $v >> 1;
2582 }
2583 }
2584 $v = $vinf;
2585 for ($y=0; $y<6; ++$y) {
2586 for ($x=0; $x<3; ++$x) {
2587 $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
2588 $v = $v >> 1;
2589 }
2590 }
2591 }
2592 // and a little bit...
2593 $frame[$width - 8][8] = "\x81";
2594 return $frame;
2595 }
2596
2597 /**
2598 * Set new frame for the specified version.
2599 * @param int $version version
2600 * @return Array of unsigned char.
2601 */
2602 protected function newFrame($version) {
2603 if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) {
2604 return NULL;
2605 }
2606 if (!isset($this->frames[$version])) {
2607 $this->frames[$version] = $this->createFrame($version);
2608 }
2609 if (is_null($this->frames[$version])) {
2610 return NULL;
2611 }
2612 return $this->frames[$version];
2613 }
2614
2615 /**
2616 * Return block number 0
2617 * @param array $spec
2618 * @return int value
2619 */
2620 protected function rsBlockNum($spec) {
2621 return ($spec[0] + $spec[3]);
2622 }
2623
2624 /**
2625 * Return block number 1
2626 * @param array $spec
2627 * @return int value
2628 */
2629 protected function rsBlockNum1($spec) {
2630 return $spec[0];
2631 }
2632
2633 /**
2634 * Return data codes 1
2635 * @param array $spec
2636 * @return int value
2637 */
2638 protected function rsDataCodes1($spec) {
2639 return $spec[1];
2640 }
2641
2642 /**
2643 * Return ecc codes 1
2644 * @param array $spec
2645 * @return int value
2646 */
2647 protected function rsEccCodes1($spec) {
2648 return $spec[2];
2649 }
2650
2651 /**
2652 * Return block number 2
2653 * @param array $spec
2654 * @return int value
2655 */
2656 protected function rsBlockNum2($spec) {
2657 return $spec[3];
2658 }
2659
2660 /**
2661 * Return data codes 2
2662 * @param array $spec
2663 * @return int value
2664 */
2665 protected function rsDataCodes2($spec) {
2666 return $spec[4];
2667 }
2668
2669 /**
2670 * Return ecc codes 2
2671 * @param array $spec
2672 * @return int value
2673 */
2674 protected function rsEccCodes2($spec) {
2675 return $spec[2];
2676 }
2677
2678 /**
2679 * Return data length
2680 * @param array $spec
2681 * @return int value
2682 */
2683 protected function rsDataLength($spec) {
2684 return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]);
2685 }
2686
2687 /**
2688 * Return ecc length
2689 * @param array $spec
2690 * @return int value
2691 */
2692 protected function rsEccLength($spec) {
2693 return ($spec[0] + $spec[3]) * $spec[2];
2694 }
2695
2696 // - - - - - - - - - - - - - - - - - - - - - - - - -
2697
2698 // QRrs
2699
2700 /**
2701 * Initialize a Reed-Solomon codec and add it to existing rsitems
2702 * @param int $symsize symbol size, bits
2703 * @param int $gfpoly Field generator polynomial coefficients
2704 * @param int $fcr first root of RS code generator polynomial, index form
2705 * @param int $prim primitive element to generate polynomial roots
2706 * @param int $nroots RS code generator polynomial degree (number of roots)
2707 * @param int $pad padding bytes at front of shortened block
2708 * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2709 */
2710 protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2711 foreach ($this->rsitems as $rs) {
2712 if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize)
2713 OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($rs['prim'] != $prim)) {
2714 continue;
2715 }
2716 return $rs;
2717 }
2718 $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);
2719 array_unshift($this->rsitems, $rs);
2720 return $rs;
2721 }
2722
2723 // - - - - - - - - - - - - - - - - - - - - - - - - -
2724
2725 // QRrsItem
2726
2727 /**
2728 * modnn
2729 * @param array RS values
2730 * @param int $x X position
2731 * @return int X osition
2732 */
2733 protected function modnn($rs, $x) {
2734 while ($x >= $rs['nn']) {
2735 $x -= $rs['nn'];
2736 $x = ($x >> $rs['mm']) + ($x & $rs['nn']);
2737 }
2738 return $x;
2739 }
2740
2741 /**
2742 * Initialize a Reed-Solomon codec and returns an array of values.
2743 * @param int $symsize symbol size, bits
2744 * @param int $gfpoly Field generator polynomial coefficients
2745 * @param int $fcr first root of RS code generator polynomial, index form
2746 * @param int $prim primitive element to generate polynomial roots
2747 * @param int $nroots RS code generator polynomial degree (number of roots)
2748 * @param int $pad padding bytes at front of shortened block
2749 * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2750 */
2751 protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2752 // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2)
2753 $rs = null;
2754 // Check parameter ranges
2755 if (($symsize < 0) OR ($symsize > 8)) {
2756 return $rs;
2757 }
2758 if (($fcr < 0) OR ($fcr >= (1<<$symsize))) {
2759 return $rs;
2760 }
2761 if (($prim <= 0) OR ($prim >= (1<<$symsize))) {
2762 return $rs;
2763 }
2764 if (($nroots < 0) OR ($nroots >= (1<<$symsize))) {
2765 return $rs;
2766 }
2767 if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) {
2768 return $rs;
2769 }
2770 $rs = array();
2771 $rs['mm'] = $symsize;
2772 $rs['nn'] = (1 << $symsize) - 1;
2773 $rs['pad'] = $pad;
2774 $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0);
2775 $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0);
2776 // PHP style macro replacement ;)
2777 $NN =& $rs['nn'];
2778 $A0 =& $NN;
2779 // Generate Galois field lookup tables
2780 $rs['index_of'][0] = $A0; // log(zero) = -inf
2781 $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0
2782 $sr = 1;
2783 for ($i=0; $i<$rs['nn']; ++$i) {
2784 $rs['index_of'][$sr] = $i;
2785 $rs['alpha_to'][$i] = $sr;
2786 $sr <<= 1;
2787 if ($sr & (1 << $symsize)) {
2788 $sr ^= $gfpoly;
2789 }
2790 $sr &= $rs['nn'];
2791 }
2792 if ($sr != 1) {
2793 // field generator polynomial is not primitive!
2794 return NULL;
2795 }
2796 // Form RS code generator polynomial from its roots
2797 $rs['genpoly'] = array_fill(0, ($nroots + 1), 0);
2798 $rs['fcr'] = $fcr;
2799 $rs['prim'] = $prim;
2800 $rs['nroots'] = $nroots;
2801 $rs['gfpoly'] = $gfpoly;
2802 // Find prim-th root of 1, used in decoding
2803 for ($iprim=1; ($iprim % $prim) != 0; $iprim += $rs['nn']) {
2804 ; // intentional empty-body loop!
2805 }
2806 $rs['iprim'] = (int)($iprim / $prim);
2807 $rs['genpoly'][0] = 1;
2808
2809
2810 for ($i = 0,$root=$fcr*$prim; $i < $nroots; $i++, $root += $prim) {
2811 $rs['genpoly'][$i+1] = 1;
2812 // Multiply rs->genpoly[] by @**(root + x)
2813 for ($j = $i; $j > 0; --$j) {
2814 if ($rs['genpoly'][$j] != 0) {
2815 $rs['genpoly'][$j] = $rs['genpoly'][$j-1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)];
2816 } else {
2817 $rs['genpoly'][$j] = $rs['genpoly'][$j-1];
2818 }
2819 }
2820 // rs->genpoly[0] can never be zero
2821 $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)];
2822 }
2823 // convert rs->genpoly[] to index form for quicker encoding
2824 for ($i = 0; $i <= $nroots; ++$i) {
2825 $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]];
2826 }
2827 return $rs;
2828 }
2829
2830 /**
2831 * Encode a Reed-Solomon codec and returns the parity array
2832 * @param array $rs RS values
2833 * @param array $data data
2834 * @param array $parity parity
2835 * @return parity array
2836 */
2837 protected function encode_rs_char($rs, $data, $parity) {
2838 $MM =& $rs['mm']; // bits per symbol
2839 $NN =& $rs['nn']; // the total number of symbols in a RS block
2840 $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
2841 $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
2842 $GENPOLY =& $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form
2843 $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
2844 $FCR =& $rs['fcr']; // first consecutive root, index form
2845 $PRIM =& $rs['prim']; // primitive element, index form
2846 $IPRIM =& $rs['iprim']; // prim-th root of 1, index form
2847 $PAD =& $rs['pad']; // the number of pad symbols in a block
2848 $A0 =& $NN;
2849 $parity = array_fill(0, $NROOTS, 0);
2850 for ($i=0; $i < ($NN - $NROOTS - $PAD); $i++) {
2851 $feedback = $INDEX_OF[$data[$i] ^ $parity[0]];
2852 if ($feedback != $A0) {
2853 // feedback term is non-zero
2854 // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must
2855 // always be for the polynomials constructed by init_rs()
2856 $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback);
2857 for ($j=1; $j < $NROOTS; ++$j) {
2858 $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])];
2859 }
2860 }
2861 // Shift
2862 array_shift($parity);
2863 if ($feedback != $A0) {
2864 array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]);
2865 } else {
2866 array_push($parity, 0);
2867 }
2868 }
2869 return $parity;
2870 }
2871
2872 } // end QRcode class
2873
2874} // END OF "class_exists QRcode"
2875?>
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