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Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401] [Versions 400 and 401] [Versions 401 and 402] [Versions 401 and 403]

   1  <?php
   2  //============================================================+
   3  // File name   : datamatrix.php
   4  // Version     : 1.0.008
   5  // Begin       : 2010-06-07
   6  // Last Update : 2014-05-06
   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) 2010-2014  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 DataMatrix ECC 200 barcode arrays for TCPDF class.
  33  // DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code.
  34  //============================================================+
  35  
  36  /**
  37  * @file
  38  * Class to create DataMatrix ECC 200 barcode arrays for TCPDF class.
  39  * DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code.
  40  *
  41  * @package com.tecnick.tcpdf
  42  * @author Nicola Asuni
  43  * @version 1.0.008
  44  */
  45  
  46  // custom definitions
  47  if (!defined('DATAMATRIXDEFS')) {
  48  
  49  	 /**
  50  	  * Indicate that definitions for this class are set
  51  	  */
  52  	 define('DATAMATRIXDEFS', true);
  53  
  54  	 // -----------------------------------------------------
  55  
  56  } // end of custom definitions
  57  
  58  // #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#
  59  
  60  
  61  /**
  62  * ASCII encoding: ASCII character 0 to 127 (1 byte per CW)
  63  */
  64  define('ENC_ASCII', 0);
  65  
  66  /**
  67  * C40 encoding: Upper-case alphanumeric (3/2 bytes per CW)
  68  */
  69  define('ENC_C40', 1);
  70  
  71  /**
  72  * TEXT encoding: Lower-case alphanumeric (3/2 bytes per CW)
  73  */
  74  define('ENC_TXT', 2);
  75  
  76  /**
  77  * X12 encoding: ANSI X12 (3/2 byte per CW)
  78  */
  79  define('ENC_X12', 3);
  80  
  81  /**
  82  * EDIFACT encoding: ASCII character 32 to 94 (4/3 bytes per CW)
  83  */
  84  define('ENC_EDF', 4);
  85  
  86  /**
  87  * BASE 256 encoding: ASCII character 0 to 255 (1 byte per CW)
  88  */
  89  define('ENC_BASE256', 5);
  90  
  91  /**
  92  * ASCII extended encoding: ASCII character 128 to 255 (1/2 byte per CW)
  93  */
  94  define('ENC_ASCII_EXT', 6);
  95  
  96  /**
  97  * ASCII number encoding: ASCII digits (2 bytes per CW)
  98  */
  99  define('ENC_ASCII_NUM', 7);
 100  
 101  /**
 102  * @class Datamatrix
 103  * Class to create DataMatrix ECC 200 barcode arrays for TCPDF class.
 104  * DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code.
 105  *
 106  * @package com.tecnick.tcpdf
 107  * @author Nicola Asuni
 108  * @version 1.0.004
 109  */
 110  class Datamatrix {
 111  
 112  	 /**
 113  	  * Barcode array to be returned which is readable by TCPDF.
 114  	  * @protected
 115  	  */
 116  	 protected $barcode_array = array();
 117  
 118  	 /**
 119  	  * Store last used encoding for data codewords.
 120  	  * @protected
 121  	  */
 122  	 protected $last_enc = ENC_ASCII;
 123  
 124  	 /**
 125  	  * Table of Data Matrix ECC 200 Symbol Attributes:<ul>
 126  	  * <li>total matrix rows (including finder pattern)</li>
 127  	  * <li>total matrix cols (including finder pattern)</li>
 128  	  * <li>total matrix rows (without finder pattern)</li>
 129  	  * <li>total matrix cols (without finder pattern)</li>
 130  	  * <li>region data rows (with finder pattern)</li>
 131  	  * <li>region data col (with finder pattern)</li>
 132  	  * <li>region data rows (without finder pattern)</li>
 133  	  * <li>region data col (without finder pattern)</li>
 134  	  * <li>horizontal regions</li>
 135  	  * <li>vertical regions</li>
 136  	  * <li>regions</li>
 137  	  * <li>data codewords</li>
 138  	  * <li>error codewords</li>
 139  	  * <li>blocks</li>
 140  	  * <li>data codewords per block</li>
 141  	  * <li>error codewords per block</li>
 142  	  * </ul>
 143  	  * @protected
 144  	  */
 145  	 protected $symbattr = array(
 146  	 	 // square form ---------------------------------------------------------------------------------------
 147  	 	 array(0x00a,0x00a,0x008,0x008,0x00a,0x00a,0x008,0x008,0x001,0x001,0x001,0x003,0x005,0x001,0x003,0x005), // 10x10
 148  	 	 array(0x00c,0x00c,0x00a,0x00a,0x00c,0x00c,0x00a,0x00a,0x001,0x001,0x001,0x005,0x007,0x001,0x005,0x007), // 12x12
 149  	 	 array(0x00e,0x00e,0x00c,0x00c,0x00e,0x00e,0x00c,0x00c,0x001,0x001,0x001,0x008,0x00a,0x001,0x008,0x00a), // 14x14
 150  	 	 array(0x010,0x010,0x00e,0x00e,0x010,0x010,0x00e,0x00e,0x001,0x001,0x001,0x00c,0x00c,0x001,0x00c,0x00c), // 16x16
 151  	 	 array(0x012,0x012,0x010,0x010,0x012,0x012,0x010,0x010,0x001,0x001,0x001,0x012,0x00e,0x001,0x012,0x00e), // 18x18
 152  	 	 array(0x014,0x014,0x012,0x012,0x014,0x014,0x012,0x012,0x001,0x001,0x001,0x016,0x012,0x001,0x016,0x012), // 20x20
 153  	 	 array(0x016,0x016,0x014,0x014,0x016,0x016,0x014,0x014,0x001,0x001,0x001,0x01e,0x014,0x001,0x01e,0x014), // 22x22
 154  	 	 array(0x018,0x018,0x016,0x016,0x018,0x018,0x016,0x016,0x001,0x001,0x001,0x024,0x018,0x001,0x024,0x018), // 24x24
 155  	 	 array(0x01a,0x01a,0x018,0x018,0x01a,0x01a,0x018,0x018,0x001,0x001,0x001,0x02c,0x01c,0x001,0x02c,0x01c), // 26x26
 156  	 	 array(0x020,0x020,0x01c,0x01c,0x010,0x010,0x00e,0x00e,0x002,0x002,0x004,0x03e,0x024,0x001,0x03e,0x024), // 32x32
 157  	 	 array(0x024,0x024,0x020,0x020,0x012,0x012,0x010,0x010,0x002,0x002,0x004,0x056,0x02a,0x001,0x056,0x02a), // 36x36
 158  	 	 array(0x028,0x028,0x024,0x024,0x014,0x014,0x012,0x012,0x002,0x002,0x004,0x072,0x030,0x001,0x072,0x030), // 40x40
 159  	 	 array(0x02c,0x02c,0x028,0x028,0x016,0x016,0x014,0x014,0x002,0x002,0x004,0x090,0x038,0x001,0x090,0x038), // 44x44
 160  	 	 array(0x030,0x030,0x02c,0x02c,0x018,0x018,0x016,0x016,0x002,0x002,0x004,0x0ae,0x044,0x001,0x0ae,0x044), // 48x48
 161  	 	 array(0x034,0x034,0x030,0x030,0x01a,0x01a,0x018,0x018,0x002,0x002,0x004,0x0cc,0x054,0x002,0x066,0x02a), // 52x52
 162  	 	 array(0x040,0x040,0x038,0x038,0x010,0x010,0x00e,0x00e,0x004,0x004,0x010,0x118,0x070,0x002,0x08c,0x038), // 64x64
 163  	 	 array(0x048,0x048,0x040,0x040,0x012,0x012,0x010,0x010,0x004,0x004,0x010,0x170,0x090,0x004,0x05c,0x024), // 72x72
 164  	 	 array(0x050,0x050,0x048,0x048,0x014,0x014,0x012,0x012,0x004,0x004,0x010,0x1c8,0x0c0,0x004,0x072,0x030), // 80x80
 165  	 	 array(0x058,0x058,0x050,0x050,0x016,0x016,0x014,0x014,0x004,0x004,0x010,0x240,0x0e0,0x004,0x090,0x038), // 88x88
 166  	 	 array(0x060,0x060,0x058,0x058,0x018,0x018,0x016,0x016,0x004,0x004,0x010,0x2b8,0x110,0x004,0x0ae,0x044), // 96x96
 167  	 	 array(0x068,0x068,0x060,0x060,0x01a,0x01a,0x018,0x018,0x004,0x004,0x010,0x330,0x150,0x006,0x088,0x038), // 104x104
 168  	 	 array(0x078,0x078,0x06c,0x06c,0x014,0x014,0x012,0x012,0x006,0x006,0x024,0x41a,0x198,0x006,0x0af,0x044), // 120x120
 169  	 	 array(0x084,0x084,0x078,0x078,0x016,0x016,0x014,0x014,0x006,0x006,0x024,0x518,0x1f0,0x008,0x0a3,0x03e), // 132x132
 170  	 	 array(0x090,0x090,0x084,0x084,0x018,0x018,0x016,0x016,0x006,0x006,0x024,0x616,0x26c,0x00a,0x09c,0x03e), // 144x144
 171  	 	 // rectangular form (currently unused) ---------------------------------------------------------------------------
 172  	 	 array(0x008,0x012,0x006,0x010,0x008,0x012,0x006,0x010,0x001,0x001,0x001,0x005,0x007,0x001,0x005,0x007), // 8x18
 173  	 	 array(0x008,0x020,0x006,0x01c,0x008,0x010,0x006,0x00e,0x001,0x002,0x002,0x00a,0x00b,0x001,0x00a,0x00b), // 8x32
 174  	 	 array(0x00c,0x01a,0x00a,0x018,0x00c,0x01a,0x00a,0x018,0x001,0x001,0x001,0x010,0x00e,0x001,0x010,0x00e), // 12x26
 175  	 	 array(0x00c,0x024,0x00a,0x020,0x00c,0x012,0x00a,0x010,0x001,0x002,0x002,0x00c,0x012,0x001,0x00c,0x012), // 12x36
 176  	 	 array(0x010,0x024,0x00e,0x020,0x010,0x012,0x00e,0x010,0x001,0x002,0x002,0x020,0x018,0x001,0x020,0x018), // 16x36
 177  	 	 array(0x010,0x030,0x00e,0x02c,0x010,0x018,0x00e,0x016,0x001,0x002,0x002,0x031,0x01c,0x001,0x031,0x01c)  // 16x48
 178  	 );
 179  
 180  	 /**
 181  	  * Map encodation modes whit character sets.
 182  	  * @protected
 183  	  */
 184  	 protected $chset_id = array(ENC_C40 => 'C40', ENC_TXT => 'TXT', ENC_X12 =>'X12');
 185  
 186  	 /**
 187  	  * Basic set of characters for each encodation mode.
 188  	  * @protected
 189  	  */
 190  	 protected $chset = array(
 191  	 	 'C40' => array( // Basic set for C40 ----------------------------------------------------------------------------
 192  	 	 	 'S1'=>0x00,'S2'=>0x01,'S3'=>0x02,0x20=>0x03,0x30=>0x04,0x31=>0x05,0x32=>0x06,0x33=>0x07,0x34=>0x08,0x35=>0x09, //
 193  	 	 	 0x36=>0x0a,0x37=>0x0b,0x38=>0x0c,0x39=>0x0d,0x41=>0x0e,0x42=>0x0f,0x43=>0x10,0x44=>0x11,0x45=>0x12,0x46=>0x13, //
 194  	 	 	 0x47=>0x14,0x48=>0x15,0x49=>0x16,0x4a=>0x17,0x4b=>0x18,0x4c=>0x19,0x4d=>0x1a,0x4e=>0x1b,0x4f=>0x1c,0x50=>0x1d, //
 195  	 	 	 0x51=>0x1e,0x52=>0x1f,0x53=>0x20,0x54=>0x21,0x55=>0x22,0x56=>0x23,0x57=>0x24,0x58=>0x25,0x59=>0x26,0x5a=>0x27),//
 196  	 	 'TXT' => array( // Basic set for TEXT ---------------------------------------------------------------------------
 197  	 	 	 'S1'=>0x00,'S2'=>0x01,'S3'=>0x02,0x20=>0x03,0x30=>0x04,0x31=>0x05,0x32=>0x06,0x33=>0x07,0x34=>0x08,0x35=>0x09, //
 198  	 	 	 0x36=>0x0a,0x37=>0x0b,0x38=>0x0c,0x39=>0x0d,0x61=>0x0e,0x62=>0x0f,0x63=>0x10,0x64=>0x11,0x65=>0x12,0x66=>0x13, //
 199  	 	 	 0x67=>0x14,0x68=>0x15,0x69=>0x16,0x6a=>0x17,0x6b=>0x18,0x6c=>0x19,0x6d=>0x1a,0x6e=>0x1b,0x6f=>0x1c,0x70=>0x1d, //
 200  	 	 	 0x71=>0x1e,0x72=>0x1f,0x73=>0x20,0x74=>0x21,0x75=>0x22,0x76=>0x23,0x77=>0x24,0x78=>0x25,0x79=>0x26,0x7a=>0x27),//
 201  	 	 'SH1' => array( // Shift 1 set ----------------------------------------------------------------------------------
 202  	 	 	 0x00=>0x00,0x01=>0x01,0x02=>0x02,0x03=>0x03,0x04=>0x04,0x05=>0x05,0x06=>0x06,0x07=>0x07,0x08=>0x08,0x09=>0x09, //
 203  	 	 	 0x0a=>0x0a,0x0b=>0x0b,0x0c=>0x0c,0x0d=>0x0d,0x0e=>0x0e,0x0f=>0x0f,0x10=>0x10,0x11=>0x11,0x12=>0x12,0x13=>0x13, //
 204  	 	 	 0x14=>0x14,0x15=>0x15,0x16=>0x16,0x17=>0x17,0x18=>0x18,0x19=>0x19,0x1a=>0x1a,0x1b=>0x1b,0x1c=>0x1c,0x1d=>0x1d, //
 205  	 	 	 0x1e=>0x1e,0x1f=>0x1f),                                                                                        //
 206  	 	 'SH2' => array( // Shift 2 set ----------------------------------------------------------------------------------
 207  	 	 	 0x21=>0x00,0x22=>0x01,0x23=>0x02,0x24=>0x03,0x25=>0x04,0x26=>0x05,0x27=>0x06,0x28=>0x07,0x29=>0x08,0x2a=>0x09, //
 208  	 	 	 0x2b=>0x0a,0x2c=>0x0b,0x2d=>0x0c,0x2e=>0x0d,0x2f=>0x0e,0x3a=>0x0f,0x3b=>0x10,0x3c=>0x11,0x3d=>0x12,0x3e=>0x13, //
 209  	 	 	 0x3f=>0x14,0x40=>0x15,0x5b=>0x16,0x5c=>0x17,0x5d=>0x18,0x5e=>0x19,0x5f=>0x1a,'F1'=>0x1b,'US'=>0x1e),           //
 210  	 	 'S3C' => array( // Shift 3 set for C40 --------------------------------------------------------------------------
 211  	 	 	 0x60=>0x00,0x61=>0x01,0x62=>0x02,0x63=>0x03,0x64=>0x04,0x65=>0x05,0x66=>0x06,0x67=>0x07,0x68=>0x08,0x69=>0x09, //
 212  	 	 	 0x6a=>0x0a,0x6b=>0x0b,0x6c=>0x0c,0x6d=>0x0d,0x6e=>0x0e,0x6f=>0x0f,0x70=>0x10,0x71=>0x11,0x72=>0x12,0x73=>0x13, //
 213  	 	 	 0x74=>0x14,0x75=>0x15,0x76=>0x16,0x77=>0x17,0x78=>0x18,0x79=>0x19,0x7a=>0x1a,0x7b=>0x1b,0x7c=>0x1c,0x7d=>0x1d, //
 214  	 	 	 0x7e=>0x1e,0x7f=>0x1f),
 215  	 	 'S3T' => array( // Shift 3 set for TEXT -------------------------------------------------------------------------
 216  	 	 	 0x60=>0x00,0x41=>0x01,0x42=>0x02,0x43=>0x03,0x44=>0x04,0x45=>0x05,0x46=>0x06,0x47=>0x07,0x48=>0x08,0x49=>0x09, //
 217  	 	 	 0x4a=>0x0a,0x4b=>0x0b,0x4c=>0x0c,0x4d=>0x0d,0x4e=>0x0e,0x4f=>0x0f,0x50=>0x10,0x51=>0x11,0x52=>0x12,0x53=>0x13, //
 218  	 	 	 0x54=>0x14,0x55=>0x15,0x56=>0x16,0x57=>0x17,0x58=>0x18,0x59=>0x19,0x5a=>0x1a,0x7b=>0x1b,0x7c=>0x1c,0x7d=>0x1d, //
 219  	 	 	 0x7e=>0x1e,0x7f=>0x1f),                                                                                        //
 220  	 	 'X12' => array( // Set for X12 ----------------------------------------------------------------------------------
 221  	 	 	 0x0d=>0x00,0x2a=>0x01,0x3e=>0x02,0x20=>0x03,0x30=>0x04,0x31=>0x05,0x32=>0x06,0x33=>0x07,0x34=>0x08,0x35=>0x09, //
 222  	 	 	 0x36=>0x0a,0x37=>0x0b,0x38=>0x0c,0x39=>0x0d,0x41=>0x0e,0x42=>0x0f,0x43=>0x10,0x44=>0x11,0x45=>0x12,0x46=>0x13, //
 223  	 	 	 0x47=>0x14,0x48=>0x15,0x49=>0x16,0x4a=>0x17,0x4b=>0x18,0x4c=>0x19,0x4d=>0x1a,0x4e=>0x1b,0x4f=>0x1c,0x50=>0x1d, //
 224  	 	 	 0x51=>0x1e,0x52=>0x1f,0x53=>0x20,0x54=>0x21,0x55=>0x22,0x56=>0x23,0x57=>0x24,0x58=>0x25,0x59=>0x26,0x5a=>0x27) //
 225  	 	 );
 226  
 227  // -----------------------------------------------------------------------------
 228  
 229  	 /**
 230  	  * This is the class constructor.
 231  	  * Creates a datamatrix object
 232  	  * @param string $code Code to represent using Datamatrix.
 233  	  * @public
 234  	  */
 235  	public function __construct($code) {
 236  	 	 $barcode_array = array();
 237  	 	 if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
 238  	 	 	 return false;
 239  	 	 }
 240  	 	 // get data codewords
 241  	 	 $cw = $this->getHighLevelEncoding($code);
 242  	 	 // number of data codewords
 243  	 	 $nd = count($cw);
 244  	 	 // check size
 245  	 	 if ($nd > 1558) {
 246  	 	 	 return false;
 247  	 	 }
 248  	 	 // get minimum required matrix size.
 249  	 	 foreach ($this->symbattr as $params) {
 250  	 	 	 if ($params[11] >= $nd) {
 251  	 	 	 	 break;
 252  	 	 	 }
 253  	 	 }
 254  	 	 if ($params[11] < $nd) {
 255  	 	 	 // too much data
 256  	 	 	 return false;
 257  	 	 } elseif ($params[11] > $nd) {
 258  	 	 	 // add padding
 259  	 	 	 if ((($params[11] - $nd) > 1) AND ($cw[($nd - 1)] != 254)) {
 260  	 	 	 	 if ($this->last_enc == ENC_EDF) {
 261  	 	 	 	 	 // switch to ASCII encoding
 262  	 	 	 	 	 $cw[] = 124;
 263  	 	 	 	 	 ++$nd;
 264  	 	 	 	 } elseif (($this->last_enc != ENC_ASCII) AND ($this->last_enc != ENC_BASE256)) {
 265  	 	 	 	 	 // switch to ASCII encoding
 266  	 	 	 	 	 $cw[] = 254;
 267  	 	 	 	 	 ++$nd;
 268  	 	 	 	 }
 269  	 	 	 }
 270  	 	 	 if ($params[11] > $nd) {
 271  	 	 	 	 // add first pad
 272  	 	 	 	 $cw[] = 129;
 273  	 	 	 	 ++$nd;
 274  	 	 	 	 // add remaining pads
 275  	 	 	 	 for ($i = $nd; $i < $params[11]; ++$i) {
 276  	 	 	 	 	 $cw[] = $this->get253StateCodeword(129, $i);
 277  	 	 	 	 }
 278  	 	 	 }
 279  	 	 }
 280  	 	 // add error correction codewords
 281  	 	 $cw = $this->getErrorCorrection($cw, $params[13], $params[14], $params[15]);
 282  	 	 // initialize empty arrays
 283  	 	 $grid = array_fill(0, ($params[2] * $params[3]), 0);
 284  	 	 // get placement map
 285  	 	 $places = $this->getPlacementMap($params[2], $params[3]);
 286  	 	 // fill the grid with data
 287  	 	 $grid = array();
 288  	 	 $i = 0;
 289  	 	 // region data row max index
 290  	 	 $rdri = ($params[4] - 1);
 291  	 	 // region data column max index
 292  	 	 $rdci = ($params[5] - 1);
 293  	 	 // for each vertical region
 294  	 	 for ($vr = 0; $vr < $params[9]; ++$vr) {
 295  	 	 	 // for each row on region
 296  	 	 	 for ($r = 0; $r < $params[4]; ++$r) {
 297  	 	 	 	 // get row
 298  	 	 	 	 $row = (($vr * $params[4]) + $r);
 299  	 	 	 	 // for each horizontal region
 300  	 	 	 	 for ($hr = 0; $hr < $params[8]; ++$hr) {
 301  	 	 	 	 	 // for each column on region
 302  	 	 	 	 	 for ($c = 0; $c < $params[5]; ++$c) {
 303  	 	 	 	 	 	 // get column
 304  	 	 	 	 	 	 $col = (($hr * $params[5]) + $c);
 305  	 	 	 	 	 	 // braw bits by case
 306  	 	 	 	 	 	 if ($r == 0) {
 307  	 	 	 	 	 	 	 // top finder pattern
 308  	 	 	 	 	 	 	 if ($c % 2) {
 309  	 	 	 	 	 	 	 	 $grid[$row][$col] = 0;
 310  	 	 	 	 	 	 	 } else {
 311  	 	 	 	 	 	 	 	 $grid[$row][$col] = 1;
 312  	 	 	 	 	 	 	 }
 313  	 	 	 	 	 	 } elseif ($r == $rdri) {
 314  	 	 	 	 	 	 	 // bottom finder pattern
 315  	 	 	 	 	 	 	 $grid[$row][$col] = 1;
 316  	 	 	 	 	 	 } elseif ($c == 0) {
 317  	 	 	 	 	 	 	 // left finder pattern
 318  	 	 	 	 	 	 	 $grid[$row][$col] = 1;
 319  	 	 	 	 	 	 } elseif ($c == $rdci) {
 320  	 	 	 	 	 	 	 // right finder pattern
 321  	 	 	 	 	 	 	 if ($r % 2) {
 322  	 	 	 	 	 	 	 	 $grid[$row][$col] = 1;
 323  	 	 	 	 	 	 	 } else {
 324  	 	 	 	 	 	 	 	 $grid[$row][$col] = 0;
 325  	 	 	 	 	 	 	 }
 326  	 	 	 	 	 	 } else { // data bit
 327  	 	 	 	 	 	 	 if ($places[$i] < 2) {
 328  	 	 	 	 	 	 	 	 $grid[$row][$col] = $places[$i];
 329  	 	 	 	 	 	 	 } else {
 330  	 	 	 	 	 	 	 	 // codeword ID
 331  	 	 	 	 	 	 	 	 $cw_id = (floor($places[$i] / 10) - 1);
 332  	 	 	 	 	 	 	 	 // codeword BIT mask
 333  	 	 	 	 	 	 	 	 $cw_bit = pow(2, (8 - ($places[$i] % 10)));
 334  	 	 	 	 	 	 	 	 $grid[$row][$col] = (($cw[$cw_id] & $cw_bit) == 0) ? 0 : 1;
 335  	 	 	 	 	 	 	 }
 336  	 	 	 	 	 	 	 ++$i;
 337  	 	 	 	 	 	 }
 338  	 	 	 	 	 }
 339  	 	 	 	 }
 340  	 	 	 }
 341  	 	 }
 342  	 	 $this->barcode_array['num_rows'] = $params[0];
 343  	 	 $this->barcode_array['num_cols'] = $params[1];
 344  	 	 $this->barcode_array['bcode'] = $grid;
 345  	 }
 346  
 347  	 /**
 348  	  * Returns a barcode array which is readable by TCPDF
 349  	  * @return array barcode array readable by TCPDF;
 350  	  * @public
 351  	  */
 352  	public function getBarcodeArray() {
 353  	 	 return $this->barcode_array;
 354  	 }
 355  
 356  	 /**
 357  	  * Product of two numbers in a Power-of-Two Galois Field
 358  	  * @param int $a first number to multiply.
 359  	  * @param int $b second number to multiply.
 360  	  * @param array $log Log table.
 361  	  * @param array $alog Anti-Log table.
 362  	  * @param int $gf Number of Factors of the Reed-Solomon polynomial.
 363  	  * @return int product
 364  	  * @protected
 365  	  */
 366  	protected function getGFProduct($a, $b, $log, $alog, $gf) {
 367  	 	 if (($a == 0) OR ($b == 0)) {
 368  	 	 	 return 0;
 369  	 	 }
 370  	 	 return ($alog[($log[$a] + $log[$b]) % ($gf - 1)]);
 371  	 }
 372  
 373  	 /**
 374  	  * Add error correction codewords to data codewords array (ANNEX E).
 375  	  * @param array $wd Array of datacodewords.
 376  	  * @param int $nb Number of blocks.
 377  	  * @param int $nd Number of data codewords per block.
 378  	  * @param int $nc Number of correction codewords per block.
 379  	  * @param int $gf numner of fields on log/antilog table (power of 2).
 380  	  * @param int $pp The value of its prime modulus polynomial (301 for ECC200).
 381  	  * @return array data codewords + error codewords
 382  	  * @protected
 383  	  */
 384  	protected function getErrorCorrection($wd, $nb, $nd, $nc, $gf=256, $pp=301) {
 385  	 	 // generate the log ($log) and antilog ($alog) tables
 386  	 	 $log[0] = 0;
 387  	 	 $alog[0] = 1;
 388  	 	 for ($i = 1; $i < $gf; ++$i) {
 389  	 	 	 $alog[$i] = ($alog[($i - 1)] * 2);
 390  	 	 	 if ($alog[$i] >= $gf) {
 391  	 	 	 	 $alog[$i] ^= $pp;
 392  	 	 	 }
 393  	 	 	 $log[$alog[$i]] = $i;
 394  	 	 }
 395  	 	 ksort($log);
 396  	 	 // generate the polynomial coefficients (c)
 397  	 	 $c = array_fill(0, ($nc + 1), 0);
 398  	 	 $c[0] = 1;
 399  	 	 for ($i = 1; $i <= $nc; ++$i) {
 400  	 	 	 $c[$i] = $c[($i-1)];
 401  	 	 	 for ($j = ($i - 1); $j >= 1; --$j) {
 402  	 	 	 	 $c[$j] = $c[($j - 1)] ^ $this->getGFProduct($c[$j], $alog[$i], $log, $alog, $gf);
 403  	 	 	 }
 404  	 	 	 $c[0] = $this->getGFProduct($c[0], $alog[$i], $log, $alog, $gf);
 405  	 	 }
 406  	 	 ksort($c);
 407  	 	 // total number of data codewords
 408  	 	 $num_wd = ($nb * $nd);
 409  	 	 // total number of error codewords
 410  	 	 $num_we = ($nb * $nc);
 411  	 	 // for each block
 412  	 	 for ($b = 0; $b < $nb; ++$b) {
 413  	 	 	 // create interleaved data block
 414  	 	 	 $block = array();
 415  	 	 	 for ($n = $b; $n < $num_wd; $n += $nb) {
 416  	 	 	 	 $block[] = $wd[$n];
 417  	 	 	 }
 418  	 	 	 // initialize error codewords
 419  	 	 	 $we = array_fill(0, ($nc + 1), 0);
 420  	 	 	 // calculate error correction codewords for this block
 421  	 	 	 for ($i = 0; $i < $nd; ++$i) {
 422  	 	 	 	 $k = ($we[0] ^ $block[$i]);
 423  	 	 	 	 for ($j = 0; $j < $nc; ++$j) {
 424  	 	 	 	 	 $we[$j] = ($we[($j + 1)] ^ $this->getGFProduct($k, $c[($nc - $j - 1)], $log, $alog, $gf));
 425  	 	 	 	 }
 426  	 	 	 }
 427  	 	 	 // add error codewords at the end of data codewords
 428  	 	 	 $j = 0;
 429  	 	 	 for ($i = $b; $i < $num_we; $i += $nb) {
 430  	 	 	 	 $wd[($num_wd + $i)] = $we[$j];
 431  	 	 	 	 ++$j;
 432  	 	 	 }
 433  	 	 }
 434  	 	 // reorder codewords
 435  	 	 ksort($wd);
 436  	 	 return $wd;
 437  	 }
 438  
 439  	 /**
 440  	  * Return the 253-state codeword
 441  	  * @param int $cwpad Pad codeword.
 442  	  * @param int $cwpos Number of data codewords from the beginning of encoded data.
 443  	  * @return int pad codeword
 444  	  * @protected
 445  	  */
 446  	protected function get253StateCodeword($cwpad, $cwpos) {
 447  	 	 $pad = ($cwpad + (((149 * $cwpos) % 253) + 1));
 448  	 	 if ($pad > 254) {
 449  	 	 	 $pad -= 254;
 450  	 	 }
 451  	 	 return $pad;
 452  	 }
 453  
 454  	 /**
 455  	  * Return the 255-state codeword
 456  	  * @param int $cwpad Pad codeword.
 457  	  * @param int $cwpos Number of data codewords from the beginning of encoded data.
 458  	  * @return int pad codeword
 459  	  * @protected
 460  	  */
 461  	protected function get255StateCodeword($cwpad, $cwpos) {
 462  	 	 $pad = ($cwpad + (((149 * $cwpos) % 255) + 1));
 463  	 	 if ($pad > 255) {
 464  	 	 	 $pad -= 256;
 465  	 	 }
 466  	 	 return $pad;
 467  	 }
 468  
 469  	 /**
 470  	  * Returns true if the char belongs to the selected mode
 471  	  * @param int $chr Character (byte) to check.
 472  	  * @param int $mode Current encoding mode.
 473  	  * @return boolean true if the char is of the selected mode.
 474  	  * @protected
 475  	  */
 476  	protected function isCharMode($chr, $mode) {
 477  	 	 $status = false;
 478  	 	 switch ($mode) {
 479  	 	 	 case ENC_ASCII: { // ASCII character 0 to 127
 480  	 	 	 	 $status = (($chr >= 0) AND ($chr <= 127));
 481  	 	 	 	 break;
 482  	 	 	 }
 483  	 	 	 case ENC_C40: { // Upper-case alphanumeric
 484  	 	 	 	 $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 65) AND ($chr <= 90)));
 485  	 	 	 	 break;
 486  	 	 	 }
 487  	 	 	 case ENC_TXT: { // Lower-case alphanumeric
 488  	 	 	 	 $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 97) AND ($chr <= 122)));
 489  	 	 	 	 break;
 490  	 	 	 }
 491  	 	 	 case ENC_X12: { // ANSI X12
 492  	 	 	 	 $status = (($chr == 13) OR ($chr == 42) OR ($chr == 62));
 493  	 	 	 	 break;
 494  	 	 	 }
 495  	 	 	 case ENC_EDF: { // ASCII character 32 to 94
 496  	 	 	 	 $status = (($chr >= 32) AND ($chr <= 94));
 497  	 	 	 	 break;
 498  	 	 	 }
 499  	 	 	 case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page)
 500  	 	 	 	 $status = (($chr == 232) OR ($chr == 233) OR ($chr == 234) OR ($chr == 241));
 501  	 	 	 	 break;
 502  	 	 	 }
 503  	 	 	 case ENC_ASCII_EXT: { // ASCII character 128 to 255
 504  	 	 	 	 $status = (($chr >= 128) AND ($chr <= 255));
 505  	 	 	 	 break;
 506  	 	 	 }
 507  	 	 	 case ENC_ASCII_NUM: { // ASCII digits
 508  	 	 	 	 $status = (($chr >= 48) AND ($chr <= 57));
 509  	 	 	 	 break;
 510  	 	 	 }
 511  	 	 }
 512  	 	 return $status;
 513  	 }
 514  
 515  	 /**
 516  	  * The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S).
 517  	  * @param string $data data to encode
 518  	  * @param int $pos current position
 519  	  * @param int $mode current encoding mode
 520  	  * @return int encoding mode
 521  	  * @protected
 522  	  */
 523  	protected function lookAheadTest($data, $pos, $mode) {
 524  	 	 $data_length = strlen($data);
 525  	 	 if ($pos >= $data_length) {
 526  	 	 	 return $mode;
 527  	 	 }
 528  	 	 $charscount = 0; // count processed chars
 529  	 	 // STEP J
 530  	 	 if ($mode == ENC_ASCII) {
 531  	 	 	 $numch = array(0, 1, 1, 1, 1, 1.25);
 532  	 	 } else {
 533  	 	 	 $numch = array(1, 2, 2, 2, 2, 2.25);
 534  	 	 	 $numch[$mode] = 0;
 535  	 	 }
 536  	 	 while (true) {
 537  	 	 	 // STEP K
 538  	 	 	 if (($pos + $charscount) == $data_length) {
 539  	 	 	 	 if ($numch[ENC_ASCII] <= ceil(min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
 540  	 	 	 	 	 return ENC_ASCII;
 541  	 	 	 	 }
 542  	 	 	 	 if ($numch[ENC_BASE256] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) {
 543  	 	 	 	 	 return ENC_BASE256;
 544  	 	 	 	 }
 545  	 	 	 	 if ($numch[ENC_EDF] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256]))) {
 546  	 	 	 	 	 return ENC_EDF;
 547  	 	 	 	 }
 548  	 	 	 	 if ($numch[ENC_TXT] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
 549  	 	 	 	 	 return ENC_TXT;
 550  	 	 	 	 }
 551  	 	 	 	 if ($numch[ENC_X12] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
 552  	 	 	 	 	 return ENC_X12;
 553  	 	 	 	 }
 554  	 	 	 	 return ENC_C40;
 555  	 	 	 }
 556  	 	 	 // get char
 557  	 	 	 $chr = ord($data[$pos + $charscount]);
 558  	 	 	 $charscount++;
 559  	 	 	 // STEP L
 560  	 	 	 if ($this->isCharMode($chr, ENC_ASCII_NUM)) {
 561  	 	 	 	 $numch[ENC_ASCII] += (1 / 2);
 562  	 	 	 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
 563  	 	 	 	 $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]);
 564  	 	 	 	 $numch[ENC_ASCII] += 2;
 565  	 	 	 } else {
 566  	 	 	 	 $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]);
 567  	 	 	 	 $numch[ENC_ASCII] += 1;
 568  	 	 	 }
 569  	 	 	 // STEP M
 570  	 	 	 if ($this->isCharMode($chr, ENC_C40)) {
 571  	 	 	 	 $numch[ENC_C40] += (2 / 3);
 572  	 	 	 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
 573  	 	 	 	 $numch[ENC_C40] += (8 / 3);
 574  	 	 	 } else {
 575  	 	 	 	 $numch[ENC_C40] += (4 / 3);
 576  	 	 	 }
 577  	 	 	 // STEP N
 578  	 	 	 if ($this->isCharMode($chr, ENC_TXT)) {
 579  	 	 	 	 $numch[ENC_TXT] += (2 / 3);
 580  	 	 	 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
 581  	 	 	 	 $numch[ENC_TXT] += (8 / 3);
 582  	 	 	 } else {
 583  	 	 	 	 $numch[ENC_TXT] += (4 / 3);
 584  	 	 	 }
 585  	 	 	 // STEP O
 586  	 	 	 if ($this->isCharMode($chr, ENC_X12) OR $this->isCharMode($chr, ENC_C40)) {
 587  	 	 	 	 $numch[ENC_X12] += (2 / 3);
 588  	 	 	 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
 589  	 	 	 	 $numch[ENC_X12] += (13 / 3);
 590  	 	 	 } else {
 591  	 	 	 	 $numch[ENC_X12] += (10 / 3);
 592  	 	 	 }
 593  	 	 	 // STEP P
 594  	 	 	 if ($this->isCharMode($chr, ENC_EDF)) {
 595  	 	 	 	 $numch[ENC_EDF] += (3 / 4);
 596  	 	 	 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
 597  	 	 	 	 $numch[ENC_EDF] += (17 / 4);
 598  	 	 	 } else {
 599  	 	 	 	 $numch[ENC_EDF] += (13 / 4);
 600  	 	 	 }
 601  	 	 	 // STEP Q
 602  	 	 	 if ($this->isCharMode($chr, ENC_BASE256)) {
 603  	 	 	 	 $numch[ENC_BASE256] += 4;
 604  	 	 	 } else {
 605  	 	 	 	 $numch[ENC_BASE256] += 1;
 606  	 	 	 }
 607  	 	 	 // STEP R
 608  	 	 	 if ($charscount >= 4) {
 609  	 	 	 	 if (($numch[ENC_ASCII] + 1) <= min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) {
 610  	 	 	 	 	 return ENC_ASCII;
 611  	 	 	 	 }
 612  	 	 	 	 if ((($numch[ENC_BASE256] + 1) <= $numch[ENC_ASCII])
 613  	 	 	 	 	 OR (($numch[ENC_BASE256] + 1) < min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) {
 614  	 	 	 	 	 return ENC_BASE256;
 615  	 	 	 	 }
 616  	 	 	 	 if (($numch[ENC_EDF] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256])) {
 617  	 	 	 	 	 return ENC_EDF;
 618  	 	 	 	 }
 619  	 	 	 	 if (($numch[ENC_TXT] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) {
 620  	 	 	 	 	 return ENC_TXT;
 621  	 	 	 	 }
 622  	 	 	 	 if (($numch[ENC_X12] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) {
 623  	 	 	 	 	 return ENC_X12;
 624  	 	 	 	 }
 625  	 	 	 	 if (($numch[ENC_C40] + 1) < min($numch[ENC_ASCII], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) {
 626  	 	 	 	 	 if ($numch[ENC_C40] < $numch[ENC_X12]) {
 627  	 	 	 	 	 	 return ENC_C40;
 628  	 	 	 	 	 }
 629  	 	 	 	 	 if ($numch[ENC_C40] == $numch[ENC_X12]) {
 630  	 	 	 	 	 	 $k = ($pos + $charscount + 1);
 631  	 	 	 	 	 	 while ($k < $data_length) {
 632  	 	 	 	 	 	 	 $tmpchr = ord($data[$k]);
 633  	 	 	 	 	 	 	 if ($this->isCharMode($tmpchr, ENC_X12)) {
 634  	 	 	 	 	 	 	 	 return ENC_X12;
 635  	 	 	 	 	 	 	 } elseif (!($this->isCharMode($tmpchr, ENC_X12) OR $this->isCharMode($tmpchr, ENC_C40))) {
 636  	 	 	 	 	 	 	 	 break;
 637  	 	 	 	 	 	 	 }
 638  	 	 	 	 	 	 	 ++$k;
 639  	 	 	 	 	 	 }
 640  	 	 	 	 	 	 return ENC_C40;
 641  	 	 	 	 	 }
 642  	 	 	 	 }
 643  	 	 	 }
 644  	 	 } // end of while
 645  	 }
 646  
 647  	 /**
 648  	  * Get the switching codeword to a new encoding mode (latch codeword)
 649  	  * @param int $mode New encoding mode.
 650  	  * @return int Switch codeword.
 651  	  * @protected
 652  	  */
 653  	protected function getSwitchEncodingCodeword($mode) {
 654  	 	 switch ($mode) {
 655  	 	 	 case ENC_ASCII: { // ASCII character 0 to 127
 656  	 	 	 	 $cw = 254;
 657  	 	 	 	 if ($this->last_enc == ENC_EDF) {
 658  	 	 	 	 	 $cw = 124;
 659  	 	 	 	 }
 660  	 	 	 	 break;
 661  	 	 	 }
 662  	 	 	 case ENC_C40: { // Upper-case alphanumeric
 663  	 	 	 	 $cw = 230;
 664  	 	 	 	 break;
 665  	 	 	 }
 666  	 	 	 case ENC_TXT: { // Lower-case alphanumeric
 667  	 	 	 	 $cw = 239;
 668  	 	 	 	 break;
 669  	 	 	 }
 670  	 	 	 case ENC_X12: { // ANSI X12
 671  	 	 	 	 $cw = 238;
 672  	 	 	 	 break;
 673  	 	 	 }
 674  	 	 	 case ENC_EDF: { // ASCII character 32 to 94
 675  	 	 	 	 $cw = 240;
 676  	 	 	 	 break;
 677  	 	 	 }
 678  	 	 	 case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page)
 679  	 	 	 	 $cw = 231;
 680  	 	 	 	 break;
 681  	 	 	 }
 682  	 	 }
 683  	 	 return $cw;
 684  	 }
 685  
 686  	 /**
 687  	  * Choose the minimum matrix size and return the max number of data codewords.
 688  	  * @param int $numcw Number of current codewords.
 689  	  * @return int number of data codewords in matrix
 690  	  * @protected
 691  	  */
 692  	protected function getMaxDataCodewords($numcw) {
 693  	 	 foreach ($this->symbattr as $key => $matrix) {
 694  	 	 	 if ($matrix[11] >= $numcw) {
 695  	 	 	 	 return $matrix[11];
 696  	 	 	 }
 697  	 	 }
 698  	 	 return 0;
 699  	 }
 700  
 701  	 /**
 702  	  * Get high level encoding using the minimum symbol data characters for ECC 200
 703  	  * @param string $data data to encode
 704  	  * @return array of codewords
 705  	  * @protected
 706  	  */
 707  	protected function getHighLevelEncoding($data) {
 708  	 	 // STEP A. Start in ASCII encodation.
 709  	 	 $enc = ENC_ASCII; // current encoding mode
 710  	 	 $pos = 0; // current position
 711  	 	 $cw = array(); // array of codewords to be returned
 712  	 	 $cw_num = 0; // number of data codewords
 713  	 	 $data_length = strlen($data); // number of chars
 714  	 	 while ($pos < $data_length) {
 715  	 	 	 // set last used encoding
 716  	 	 	 $this->last_enc = $enc;
 717  	 	 	 switch ($enc) {
 718  	 	 	 	 case ENC_ASCII: { // STEP B. While in ASCII encodation
 719  	 	 	 	 	 if (($data_length > 1) AND ($pos < ($data_length - 1)) AND ($this->isCharMode(ord($data[$pos]), ENC_ASCII_NUM) AND $this->isCharMode(ord($data[$pos + 1]), ENC_ASCII_NUM))) {
 720  	 	 	 	 	 	 // 1. If the next data sequence is at least 2 consecutive digits, encode the next two digits as a double digit in ASCII mode.
 721  	 	 	 	 	 	 $cw[] = (intval(substr($data, $pos, 2)) + 130);
 722  	 	 	 	 	 	 ++$cw_num;
 723  	 	 	 	 	 	 $pos += 2;
 724  	 	 	 	 	 } else {
 725  	 	 	 	 	 	 // 2. If the look-ahead test (starting at step J) indicates another mode, switch to that mode.
 726  	 	 	 	 	 	 $newenc = $this->lookAheadTest($data, $pos, $enc);
 727  	 	 	 	 	 	 if ($newenc != $enc) {
 728  	 	 	 	 	 	 	 // switch to new encoding
 729  	 	 	 	 	 	 	 $enc = $newenc;
 730  	 	 	 	 	 	 	 $cw[] = $this->getSwitchEncodingCodeword($enc);
 731  	 	 	 	 	 	 	 ++$cw_num;
 732  	 	 	 	 	 	 } else {
 733  	 	 	 	 	 	 	 // get new byte
 734  	 	 	 	 	 	 	 $chr = ord($data[$pos]);
 735  	 	 	 	 	 	 	 ++$pos;
 736  	 	 	 	 	 	 	 if ($this->isCharMode($chr, ENC_ASCII_EXT)) {
 737  	 	 	 	 	 	 	 	 // 3. If the next data character is extended ASCII (greater than 127) encode it in ASCII mode first using the Upper Shift (value 235) character.
 738  	 	 	 	 	 	 	 	 $cw[] = 235;
 739  	 	 	 	 	 	 	 	 $cw[] = ($chr - 127);
 740  	 	 	 	 	 	 	 	 $cw_num += 2;
 741  	 	 	 	 	 	 	 } else {
 742  	 	 	 	 	 	 	 	 // 4. Otherwise process the next data character in ASCII encodation.
 743  	 	 	 	 	 	 	 	 $cw[] = ($chr + 1);
 744  	 	 	 	 	 	 	 	 ++$cw_num;
 745  	 	 	 	 	 	 	 }
 746  	 	 	 	 	 	 }
 747  	 	 	 	 	 }
 748  	 	 	 	 	 break;
 749  	 	 	 	 }
 750  	 	 	 	 case ENC_C40 :   // Upper-case alphanumeric
 751  	 	 	 	 case ENC_TXT :   // Lower-case alphanumeric
 752  	 	 	 	 case ENC_X12 : { // ANSI X12
 753  	 	 	 	 	 $temp_cw = array();
 754  	 	 	 	 	 $p = 0;
 755  	 	 	 	 	 $epos = $pos;
 756  	 	 	 	 	 // get charset ID
 757  	 	 	 	 	 $set_id = $this->chset_id[$enc];
 758  	 	 	 	 	 // get basic charset for current encoding
 759  	 	 	 	 	 $charset = $this->chset[$set_id];
 760  	 	 	 	 	 do {
 761  	 	 	 	 	 	 // 2. process the next character in C40 encodation.
 762  	 	 	 	 	 	 $chr = ord($data[$epos]);
 763  	 	 	 	 	 	 ++$epos;
 764  	 	 	 	 	 	 // check for extended character
 765  	 	 	 	 	 	 if ($chr & 0x80) {
 766  	 	 	 	 	 	 	 if ($enc == ENC_X12) {
 767  	 	 	 	 	 	 	 	 return false;
 768  	 	 	 	 	 	 	 }
 769  	 	 	 	 	 	 	 $chr = ($chr & 0x7f);
 770  	 	 	 	 	 	 	 $temp_cw[] = 1; // shift 2
 771  	 	 	 	 	 	 	 $temp_cw[] = 30; // upper shift
 772  	 	 	 	 	 	 	 $p += 2;
 773  	 	 	 	 	 	 }
 774  	 	 	 	 	 	 if (isset($charset[$chr])) {
 775  	 	 	 	 	 	 	 $temp_cw[] = $charset[$chr];
 776  	 	 	 	 	 	 	 ++$p;
 777  	 	 	 	 	 	 } else {
 778  	 	 	 	 	 	 	 if (isset($this->chset['SH1'][$chr])) {
 779  	 	 	 	 	 	 	 	 $temp_cw[] = 0; // shift 1
 780  	 	 	 	 	 	 	 	 $shiftset = $this->chset['SH1'];
 781  	 	 	 	 	 	 	 } elseif (isset($chr, $this->chset['SH2'][$chr])) {
 782  	 	 	 	 	 	 	 	 $temp_cw[] = 1; // shift 2
 783  	 	 	 	 	 	 	 	 $shiftset = $this->chset['SH2'];
 784  	 	 	 	 	 	 	 } elseif (($enc == ENC_C40) AND isset($this->chset['S3C'][$chr])) {
 785  	 	 	 	 	 	 	 	 $temp_cw[] = 2; // shift 3
 786  	 	 	 	 	 	 	 	 $shiftset = $this->chset['S3C'];
 787  	 	 	 	 	 	 	 } elseif (($enc == ENC_TXT) AND isset($this->chset['S3T'][$chr])) {
 788  	 	 	 	 	 	 	 	 $temp_cw[] = 2; // shift 3
 789  	 	 	 	 	 	 	 	 $shiftset = $this->chset['S3T'];
 790  	 	 	 	 	 	 	 } else {
 791  	 	 	 	 	 	 	 	 return false;
 792  	 	 	 	 	 	 	 }
 793  	 	 	 	 	 	 	 $temp_cw[] = $shiftset[$chr];
 794  	 	 	 	 	 	 	 $p += 2;
 795  	 	 	 	 	 	 }
 796  	 	 	 	 	 	 if ($p >= 3) {
 797  	 	 	 	 	 	 	 $c1 = array_shift($temp_cw);
 798  	 	 	 	 	 	 	 $c2 = array_shift($temp_cw);
 799  	 	 	 	 	 	 	 $c3 = array_shift($temp_cw);
 800  	 	 	 	 	 	 	 $p -= 3;
 801  	 	 	 	 	 	 	 $tmp = ((1600 * $c1) + (40 * $c2) + $c3 + 1);
 802  	 	 	 	 	 	 	 $cw[] = ($tmp >> 8);
 803  	 	 	 	 	 	 	 $cw[] = ($tmp % 256);
 804  	 	 	 	 	 	 	 $cw_num += 2;
 805  	 	 	 	 	 	 	 $pos = $epos;
 806  	 	 	 	 	 	 	 // 1. If the C40 encoding is at the point of starting a new double symbol character and if the look-ahead test (starting at step J) indicates another mode, switch to that mode.
 807  	 	 	 	 	 	 	 $newenc = $this->lookAheadTest($data, $pos, $enc);
 808  	 	 	 	 	 	 	 if ($newenc != $enc) {
 809  	 	 	 	 	 	 	 	 // switch to new encoding
 810  	 	 	 	 	 	 	 	 $enc = $newenc;
 811  	 	 	 	 	 	 	 	 if ($enc != ENC_ASCII) {
 812  	 	 	 	 	 	 	 	 	 // set unlatch character
 813  	 	 	 	 	 	 	 	 	 $cw[] = $this->getSwitchEncodingCodeword(ENC_ASCII);
 814  	 	 	 	 	 	 	 	 	 ++$cw_num;
 815  	 	 	 	 	 	 	 	 }
 816  	 	 	 	 	 	 	 	 $cw[] = $this->getSwitchEncodingCodeword($enc);
 817  	 	 	 	 	 	 	 	 ++$cw_num;
 818  	 	 	 	 	 	 	 	 $pos -= $p;
 819  	 	 	 	 	 	 	 	 $p = 0;
 820  	 	 	 	 	 	 	 	 break;
 821  	 	 	 	 	 	 	 }
 822  	 	 	 	 	 	 }
 823  	 	 	 	 	 } while (($p > 0) AND ($epos < $data_length));
 824  	 	 	 	 	 // process last data (if any)
 825  	 	 	 	 	 if ($p > 0) {
 826  	 	 	 	 	 	 // get remaining number of data symbols
 827  	 	 	 	 	 	 $cwr = ($this->getMaxDataCodewords($cw_num) - $cw_num);
 828  	 	 	 	 	 	 if (($cwr == 1) AND ($p == 1)) {
 829  	 	 	 	 	 	 	 // d. If one symbol character remains and one C40 value (data character) remains to be encoded
 830  	 	 	 	 	 	 	 $c1 = array_shift($temp_cw);
 831  	 	 	 	 	 	 	 --$p;
 832  	 	 	 	 	 	 	 $cw[] = ($chr + 1);
 833  	 	 	 	 	 	 	 ++$cw_num;
 834  	 	 	 	 	 	 	 $pos = $epos;
 835  	 	 	 	 	 	 	 $enc = ENC_ASCII;
 836  	 	 	 	 	 	 	 $this->last_enc = $enc;
 837  	 	 	 	 	 	 } elseif (($cwr == 2) AND ($p == 1)) {
 838  	 	 	 	 	 	 	 // c. If two symbol characters remain and only one C40 value (data character) remains to be encoded
 839  	 	 	 	 	 	 	 $c1 = array_shift($temp_cw);
 840  	 	 	 	 	 	 	 --$p;
 841  	 	 	 	 	 	 	 $cw[] = 254;
 842  	 	 	 	 	 	 	 $cw[] = ($chr + 1);
 843  	 	 	 	 	 	 	 $cw_num += 2;
 844  	 	 	 	 	 	 	 $pos = $epos;
 845  	 	 	 	 	 	 	 $enc = ENC_ASCII;
 846  	 	 	 	 	 	 	 $this->last_enc = $enc;
 847  	 	 	 	 	 	 } elseif (($cwr == 2) AND ($p == 2)) {
 848  	 	 	 	 	 	 	 // b. If two symbol characters remain and two C40 values remain to be encoded
 849  	 	 	 	 	 	 	 $c1 = array_shift($temp_cw);
 850  	 	 	 	 	 	 	 $c2 = array_shift($temp_cw);
 851  	 	 	 	 	 	 	 $p -= 2;
 852  	 	 	 	 	 	 	 $tmp = ((1600 * $c1) + (40 * $c2) + 1);
 853  	 	 	 	 	 	 	 $cw[] = ($tmp >> 8);
 854  	 	 	 	 	 	 	 $cw[] = ($tmp % 256);
 855  	 	 	 	 	 	 	 $cw_num += 2;
 856  	 	 	 	 	 	 	 $pos = $epos;
 857  	 	 	 	 	 	 	 $enc = ENC_ASCII;
 858  	 	 	 	 	 	 	 $this->last_enc = $enc;
 859  	 	 	 	 	 	 } else {
 860  	 	 	 	 	 	 	 // switch to ASCII encoding
 861  	 	 	 	 	 	 	 if ($enc != ENC_ASCII) {
 862  	 	 	 	 	 	 	 	 $enc = ENC_ASCII;
 863  	 	 	 	 	 	 	 	 $this->last_enc = $enc;
 864  	 	 	 	 	 	 	 	 $cw[] = $this->getSwitchEncodingCodeword($enc);
 865  	 	 	 	 	 	 	 	 ++$cw_num;
 866  	 	 	 	 	 	 	 	 $pos = ($epos - $p);
 867  	 	 	 	 	 	 	 }
 868  	 	 	 	 	 	 }
 869  	 	 	 	 	 }
 870  	 	 	 	 	 break;
 871  	 	 	 	 }
 872  	 	 	 	 case ENC_EDF: { // F. While in EDIFACT (EDF) encodation
 873  	 	 	 	 	 // initialize temporary array with 0 length
 874  	 	 	 	 	 $temp_cw = array();
 875  	 	 	 	 	 $epos = $pos;
 876  	 	 	 	 	 $field_length = 0;
 877  	 	 	 	 	 $newenc = $enc;
 878  	 	 	 	 	 do {
 879  	 	 	 	 	 	 // 2. process the next character in EDIFACT encodation.
 880  	 	 	 	 	 	 $chr = ord($data[$epos]);
 881  	 	 	 	 	 	 if ($this->isCharMode($chr, ENC_EDF)) {
 882  	 	 	 	 	 	 	 ++$epos;
 883  	 	 	 	 	 	 	 $temp_cw[] = $chr;
 884  	 	 	 	 	 	 	 ++$field_length;
 885  	 	 	 	 	 	 }
 886  	 	 	 	 	 	 if (($field_length == 4) OR ($epos == $data_length) OR !$this->isCharMode($chr, ENC_EDF)) {
 887  	 	 	 	 	 	 	 if (($epos == $data_length) AND ($field_length < 3)) {
 888  	 	 	 	 	 	 	 	 $enc = ENC_ASCII;
 889  	 	 	 	 	 	 	 	 $cw[] = $this->getSwitchEncodingCodeword($enc);
 890  	 	 	 	 	 	 	 	 ++$cw_num;
 891  	 	 	 	 	 	 	 	 break;
 892  	 	 	 	 	 	 	 }
 893  	 	 	 	 	 	 	 if ($field_length < 4) {
 894  	 	 	 	 	 	 	 	 // set unlatch character
 895  	 	 	 	 	 	 	 	 $temp_cw[] = 0x1f;
 896  	 	 	 	 	 	 	 	 ++$field_length;
 897  	 	 	 	 	 	 	 	 // fill empty characters
 898  	 	 	 	 	 	 	 	 for ($i = $field_length; $i < 4; ++$i) {
 899  	 	 	 	 	 	 	 	 	 $temp_cw[] = 0;
 900  	 	 	 	 	 	 	 	 }
 901  	 	 	 	 	 	 	 	 $enc = ENC_ASCII;
 902  	 	 	 	 	 	 	 	 $this->last_enc = $enc;
 903  	 	 	 	 	 	 	 }
 904  	 	 	 	 	 	 	 // encodes four data characters in three codewords
 905  	 	 	 	 	 	 	 $tcw = (($temp_cw[0] & 0x3F) << 2) + (($temp_cw[1] & 0x30) >> 4);
 906  	 	 	 	 	 	 	 if ($tcw > 0) {
 907  	 	 	 	 	 	 	 	 $cw[] = $tcw;
 908  	 	 	 	 	 	 	 	 $cw_num++;
 909  	 	 	 	 	 	 	 }
 910  	 	 	 	 	 	 	 $tcw= (($temp_cw[1] & 0x0F) << 4) + (($temp_cw[2] & 0x3C) >> 2);
 911  	 	 	 	 	 	 	 if ($tcw > 0) {
 912  	 	 	 	 	 	 	 	 $cw[] = $tcw;
 913  	 	 	 	 	 	 	 	 $cw_num++;
 914  	 	 	 	 	 	 	 }
 915  	 	 	 	 	 	 	 $tcw = (($temp_cw[2] & 0x03) << 6) + ($temp_cw[3] & 0x3F);
 916  	 	 	 	 	 	 	 if ($tcw > 0) {
 917  	 	 	 	 	 	 	 	 $cw[] = $tcw;
 918  	 	 	 	 	 	 	 	 $cw_num++;
 919  	 	 	 	 	 	 	 }
 920  	 	 	 	 	 	 	 $temp_cw = array();
 921  	 	 	 	 	 	 	 $pos = $epos;
 922  	 	 	 	 	 	 	 $field_length = 0;
 923  	 	 	 	 	 	 	 if ($enc == ENC_ASCII) {
 924  	 	 	 	 	 	 	 	 break; // exit from EDIFACT mode
 925  	 	 	 	 	 	 	 }
 926  	 	 	 	 	 	 }
 927  	 	 	 	 	 } while ($epos < $data_length);
 928  	 	 	 	 	 break;
 929  	 	 	 	 }
 930  	 	 	 	 case ENC_BASE256: { // G. While in Base 256 (B256) encodation
 931  	 	 	 	 	 // initialize temporary array with 0 length
 932  	 	 	 	 	 $temp_cw = array();
 933  	 	 	 	 	 $field_length = 0;
 934  	 	 	 	 	 while (($pos < $data_length) AND ($field_length <= 1555)) {
 935  	 	 	 	 	 	 $newenc = $this->lookAheadTest($data, $pos, $enc);
 936  	 	 	 	 	 	 if ($newenc != $enc) {
 937  	 	 	 	 	 	 	 // 1. If the look-ahead test (starting at step J) indicates another mode, switch to that mode.
 938  	 	 	 	 	 	 	 $enc = $newenc;
 939  	 	 	 	 	 	 	 break; // exit from B256 mode
 940  	 	 	 	 	 	 } else {
 941  	 	 	 	 	 	 	 // 2. Otherwise, process the next character in Base 256 encodation.
 942  	 	 	 	 	 	 	 $chr = ord($data[$pos]);
 943  	 	 	 	 	 	 	 ++$pos;
 944  	 	 	 	 	 	 	 $temp_cw[] = $chr;
 945  	 	 	 	 	 	 	 ++$field_length;
 946  	 	 	 	 	 	 }
 947  	 	 	 	 	 }
 948  	 	 	 	 	 // set field length
 949  	 	 	 	 	 if ($field_length <= 249) {
 950  	 	 	 	 	 	 $cw[] = $this->get255StateCodeword($field_length, ($cw_num + 1));
 951  	 	 	 	 	 	 ++$cw_num;
 952  	 	 	 	 	 } else {
 953  	 	 	 	 	 	 $cw[] = $this->get255StateCodeword((floor($field_length / 250) + 249), ($cw_num + 1));
 954  	 	 	 	 	 	 $cw[] = $this->get255StateCodeword(($field_length % 250), ($cw_num + 2));
 955  	 	 	 	 	 	 $cw_num += 2;
 956  	 	 	 	 	 }
 957  	 	 	 	 	 if (!empty($temp_cw)) {
 958  	 	 	 	 	 	 // add B256 field
 959  	 	 	 	 	 	 foreach ($temp_cw as $p => $cht) {
 960  	 	 	 	 	 	 	 $cw[] = $this->get255StateCodeword($cht, ($cw_num + $p + 1));
 961  	 	 	 	 	 	 }
 962  	 	 	 	 	 }
 963  	 	 	 	 	 break;
 964  	 	 	 	 }
 965  	 	 	 } // end of switch enc
 966  	 	 } // end of while
 967  	 	 return $cw;
 968  	 }
 969  
 970  	 /**
 971  	  * Places "chr+bit" with appropriate wrapping within array[].
 972  	  * (Annex F - ECC 200 symbol character placement)
 973  	  * @param array $marr Array of symbols.
 974  	  * @param int $nrow Number of rows.
 975  	  * @param int $ncol Number of columns.
 976  	  * @param int $row Row number.
 977  	  * @param int $col Column number.
 978  	  * @param int $chr Char byte.
 979  	  * @param int $bit Bit.
 980  	  * @return array
 981  	  * @protected
 982  	  */
 983  	protected function placeModule($marr, $nrow, $ncol, $row, $col, $chr, $bit) {
 984  	 	 if ($row < 0) {
 985  	 	 	 $row += $nrow;
 986  	 	 	 $col += (4 - (($nrow + 4) % 8));
 987  	 	 }
 988  	 	 if ($col < 0) {
 989  	 	 	 $col += $ncol;
 990  	 	 	 $row += (4 - (($ncol + 4) % 8));
 991  	 	 }
 992  	 	 $marr[(($row * $ncol) + $col)] = ((10 * $chr) + $bit);
 993  	 	 return $marr;
 994  	 }
 995  
 996  	 /**
 997  	  * Places the 8 bits of a utah-shaped symbol character.
 998  	  * (Annex F - ECC 200 symbol character placement)
 999  	  * @param array $marr Array of symbols.
1000  	  * @param int $nrow Number of rows.
1001  	  * @param int $ncol Number of columns.
1002  	  * @param int $row Row number.
1003  	  * @param int $col Column number.
1004  	  * @param int $chr Char byte.
1005  	  * @return array
1006  	  * @protected
1007  	  */
1008  	protected function placeUtah($marr, $nrow, $ncol, $row, $col, $chr) {
1009  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-2, $chr, 1);
1010  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-1, $chr, 2);
1011  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-2, $chr, 3);
1012  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-1, $chr, 4);
1013  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col,   $chr, 5);
1014  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row,   $col-2, $chr, 6);
1015  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row,   $col-1, $chr, 7);
1016  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $row,   $col,   $chr, 8);
1017  	 	 return $marr;
1018  	 }
1019  
1020  	 /**
1021  	  * Places the 8 bits of the first special corner case.
1022  	  * (Annex F - ECC 200 symbol character placement)
1023  	  * @param array $marr Array of symbols.
1024  	  * @param int $nrow Number of rows.
1025  	  * @param int $ncol Number of columns.
1026  	  * @param int $chr Char byte.
1027  	  * @return array
1028  	  * @protected
1029  	  */
1030  	protected function placeCornerA($marr, $nrow, $ncol, $chr) {
1031  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0,       $chr, 1);
1032  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 1,       $chr, 2);
1033  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 2,       $chr, 3);
1034  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-2, $chr, 4);
1035  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-1, $chr, 5);
1036  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 1,       $ncol-1, $chr, 6);
1037  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 2,       $ncol-1, $chr, 7);
1038  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 3,       $ncol-1, $chr, 8);
1039  	 	 return $marr;
1040  	 }
1041  
1042  	 /**
1043  	  * Places the 8 bits of the second special corner case.
1044  	  * (Annex F - ECC 200 symbol character placement)
1045  	  * @param array $marr Array of symbols.
1046  	  * @param int $nrow Number of rows.
1047  	  * @param int $ncol Number of columns.
1048  	  * @param int $chr Char byte.
1049  	  * @return array
1050  	  * @protected
1051  	  */
1052  	protected function placeCornerB($marr, $nrow, $ncol, $chr) {
1053  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0,       $chr, 1);
1054  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0,       $chr, 2);
1055  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0,       $chr, 3);
1056  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-4, $chr, 4);
1057  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-3, $chr, 5);
1058  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-2, $chr, 6);
1059  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-1, $chr, 7);
1060  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 1,       $ncol-1, $chr, 8);
1061  	 	 return $marr;
1062  	 }
1063  
1064  	 /**
1065  	  * Places the 8 bits of the third special corner case.
1066  	  * (Annex F - ECC 200 symbol character placement)
1067  	  * @param array $marr Array of symbols.
1068  	  * @param int $nrow Number of rows.
1069  	  * @param int $ncol Number of columns.
1070  	  * @param int $chr Char byte.
1071  	  * @return array
1072  	  * @protected
1073  	  */
1074  	protected function placeCornerC($marr, $nrow, $ncol, $chr) {
1075  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0,       $chr, 1);
1076  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0,       $chr, 2);
1077  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0,       $chr, 3);
1078  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-2, $chr, 4);
1079  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-1, $chr, 5);
1080  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 1,       $ncol-1, $chr, 6);
1081  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 2,       $ncol-1, $chr, 7);
1082  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 3,       $ncol-1, $chr, 8);
1083  	 	 return $marr;
1084  	 }
1085  
1086  	 /**
1087  	  * Places the 8 bits of the fourth special corner case.
1088  	  * (Annex F - ECC 200 symbol character placement)
1089  	  * @param array $marr Array of symbols.
1090  	  * @param int $nrow Number of rows.
1091  	  * @param int $ncol Number of columns.
1092  	  * @param int $chr Char byte.
1093  	  * @return array
1094  	  * @protected
1095  	  */
1096  	protected function placeCornerD($marr, $nrow, $ncol, $chr) {
1097  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0,       $chr, 1);
1098  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, $ncol-1, $chr, 2);
1099  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-3, $chr, 3);
1100  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-2, $chr, 4);
1101  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 0,       $ncol-1, $chr, 5);
1102  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 1,       $ncol-3, $chr, 6);
1103  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 1,       $ncol-2, $chr, 7);
1104  	 	 $marr = $this->placeModule($marr, $nrow, $ncol, 1,       $ncol-1, $chr, 8);
1105  	 	 return $marr;
1106  	 }
1107  
1108  	 /**
1109  	  * Build a placement map.
1110  	  * (Annex F - ECC 200 symbol character placement)
1111  	  * @param int $nrow Number of rows.
1112  	  * @param int $ncol Number of columns.
1113  	  * @return array
1114  	  * @protected
1115  	  */
1116  	protected function getPlacementMap($nrow, $ncol) {
1117  	 	 // initialize array with zeros
1118  	 	 $marr = array_fill(0, ($nrow * $ncol), 0);
1119  	 	 // set starting values
1120  	 	 $chr = 1;
1121  	 	 $row = 4;
1122  	 	 $col = 0;
1123  	 	 do {
1124  	 	 	 // repeatedly first check for one of the special corner cases, then
1125  	 	 	 if (($row == $nrow) AND ($col == 0)) {
1126  	 	 	 	 $marr = $this->placeCornerA($marr, $nrow, $ncol, $chr);
1127  	 	 	 	 ++$chr;
1128  	 	 	 }
1129  	 	 	 if (($row == ($nrow - 2)) AND ($col == 0) AND ($ncol % 4)) {
1130  	 	 	 	 $marr = $this->placeCornerB($marr, $nrow, $ncol, $chr);
1131  	 	 	 	 ++$chr;
1132  	 	 	 }
1133  	 	 	 if (($row == ($nrow - 2)) AND ($col == 0) AND (($ncol % 8) == 4)) {
1134  	 	 	 	 $marr = $this->placeCornerC($marr, $nrow, $ncol, $chr);
1135  	 	 	 	 ++$chr;
1136  	 	 	 }
1137  	 	 	 if (($row == ($nrow + 4)) AND ($col == 2) AND (!($ncol % 8))) {
1138  	 	 	 	 $marr = $this->placeCornerD($marr, $nrow, $ncol, $chr);
1139  	 	 	 	 ++$chr;
1140  	 	 	 }
1141  	 	 	 // sweep upward diagonally, inserting successive characters,
1142  	 	 	 do {
1143  	 	 	 	 if (($row < $nrow) AND ($col >= 0) AND (!$marr[(($row * $ncol) + $col)])) {
1144  	 	 	 	 	 $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr);
1145  	 	 	 	 	 ++$chr;
1146  	 	 	 	 }
1147  	 	 	 	 $row -= 2;
1148  	 	 	 	 $col += 2;
1149  	 	 	 } while (($row >= 0) AND ($col < $ncol));
1150  	 	 	 ++$row;
1151  	 	 	 $col += 3;
1152  	 	 	 // & then sweep downward diagonally, inserting successive characters,...
1153  	 	 	 do {
1154  	 	 	 	 if (($row >= 0) AND ($col < $ncol) AND (!$marr[(($row * $ncol) + $col)])) {
1155  	 	 	 	 	 $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr);
1156  	 	 	 	 	 ++$chr;
1157  	 	 	 	 }
1158  	 	 	 	 $row += 2;
1159  	 	 	 	 $col -= 2;
1160  	 	 	 } while (($row < $nrow) AND ($col >= 0));
1161  	 	 	 $row += 3;
1162  	 	 	 ++$col;
1163  	 	 	 // ... until the entire array is scanned
1164  	 	 } while (($row < $nrow) OR ($col < $ncol));
1165  	 	 // lastly, if the lower righthand corner is untouched, fill in fixed pattern
1166  	 	 if (!$marr[(($nrow * $ncol) - 1)]) {
1167  	 	 	 $marr[(($nrow * $ncol) - 1)] = 1;
1168  	 	 	 $marr[(($nrow * $ncol) - $ncol - 2)] = 1;
1169  	 	 }
1170  	 	 return $marr;
1171  	 }
1172  
1173  } // end DataMatrix class
1174  //============================================================+
1175  // END OF FILE
1176  //============================================================+