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<?php |
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//============================================================+ |
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// File name : datamatrix.php |
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// Version : 1.0.001 |
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// Begin : 2010-06-07 |
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// Last Update : 2011-09-14 |
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// Author : Nicola Asuni - Tecnick.com LTD - Manor Coach House, Church Hill, Aldershot, Hants, GU12 4RQ, UK - www.tecnick.com - info@tecnick.com |
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// License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html) |
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// ------------------------------------------------------------------- |
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// Copyright (C) 2010-2012 Nicola Asuni - Tecnick.com LTD |
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// |
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// This file is part of TCPDF software library. |
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// |
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// TCPDF is free software: you can redistribute it and/or modify it |
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// under the terms of the GNU Lesser General Public License as |
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// published by the Free Software Foundation, either version 3 of the |
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// License, or (at your option) any later version. |
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// |
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// TCPDF is distributed in the hope that it will be useful, but |
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// WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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// See the GNU Lesser General Public License for more details. |
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// |
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// You should have received a copy of the GNU Lesser General Public License |
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// along with TCPDF. If not, see <http://www.gnu.org/licenses/>. |
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// |
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// See LICENSE.TXT file for more information. |
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// ------------------------------------------------------------------- |
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// |
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// DESCRIPTION : |
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// |
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// Class to create DataMatrix ECC 200 barcode arrays for TCPDF class. |
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// DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code. |
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//============================================================+ |
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|
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/** |
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* @file |
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* Class to create DataMatrix ECC 200 barcode arrays for TCPDF class. |
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* DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code. |
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* |
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* @package com.tecnick.tcpdf |
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* @author Nicola Asuni |
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* @version 1.0.001 |
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*/ |
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|
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// custom definitions |
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if (!defined('DATAMATRIXDEFS')) { |
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|
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/** |
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* Indicate that definitions for this class are set |
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*/ |
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define('DATAMATRIXDEFS', true); |
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|
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// ----------------------------------------------------- |
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|
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} // end of custom definitions |
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|
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// #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*# |
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|
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|
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/** |
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* ASCII encoding: ASCII character 0 to 127 (1 byte per CW) |
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*/ |
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define('ENC_ASCII', 0); |
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|
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/** |
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* C40 encoding: Upper-case alphanumeric (3/2 bytes per CW) |
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*/ |
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define('ENC_C40', 1); |
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|
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/** |
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* TEXT encoding: Lower-case alphanumeric (3/2 bytes per CW) |
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*/ |
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define('ENC_TXT', 2); |
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|
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/** |
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* X12 encoding: ANSI X12 (3/2 byte per CW) |
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*/ |
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define('ENC_X12', 3); |
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|
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/** |
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* EDIFACT encoding: ASCII character 32 to 94 (4/3 bytes per CW) |
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*/ |
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define('ENC_EDF', 4); |
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|
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/** |
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* BASE 256 encoding: ASCII character 0 to 255 (1 byte per CW) |
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*/ |
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define('ENC_BASE256', 5); |
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|
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/** |
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* ASCII extended encoding: ASCII character 128 to 255 (1/2 byte per CW) |
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*/ |
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define('ENC_ASCII_EXT', 6); |
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|
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/** |
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* ASCII number encoding: ASCII digits (2 bytes per CW) |
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*/ |
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define('ENC_ASCII_NUM', 7); |
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|
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/** |
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* @class Datamatrix |
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* Class to create DataMatrix ECC 200 barcode arrays for TCPDF class. |
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* DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code. |
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* |
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* @package com.tecnick.tcpdf |
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* @author Nicola Asuni |
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* @version 1.0.001 |
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*/ |
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class Datamatrix { |
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|
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/** |
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* Barcode array to be returned which is readable by TCPDF. |
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* @protected |
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*/ |
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protected $barcode_array = array(); |
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|
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/** |
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* Store last used encoding for data codewords. |
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* @protected |
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*/ |
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protected $last_enc = ENC_ASCII; |
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|
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/** |
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* Table of Data Matrix ECC 200 Symbol Attributes:<ul> |
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* <li>total matrix rows (including finder pattern)</li> |
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* <li>total matrix cols (including finder pattern)</li> |
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* <li>total matrix rows (without finder pattern)</li> |
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* <li>total matrix cols (without finder pattern)</li> |
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* <li>region data rows (with finder pattern)</li> |
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* <li>region data col (with finder pattern)</li> |
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* <li>region data rows (without finder pattern)</li> |
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* <li>region data col (without finder pattern)</li> |
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* <li>horizontal regions</li> |
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* <li>vertical regions</li> |
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* <li>regions</li> |
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* <li>data codewords</li> |
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* <li>error codewords</li> |
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* <li>blocks</li> |
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* <li>data codewords per block</li> |
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* <li>error codewords per block</li> |
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* </ul> |
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* @protected |
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*/ |
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protected $symbattr = array( |
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// square form --------------------------------------------------------------------------------------- |
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array(0x00a,0x00a,0x008,0x008,0x00a,0x00a,0x008,0x008,0x001,0x001,0x001,0x003,0x005,0x001,0x003,0x005), // 10x10 |
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array(0x00c,0x00c,0x00a,0x00a,0x00c,0x00c,0x00a,0x00a,0x001,0x001,0x001,0x005,0x007,0x001,0x005,0x007), // 12x12 |
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array(0x00e,0x00e,0x00c,0x00c,0x00e,0x00e,0x00c,0x00c,0x001,0x001,0x001,0x008,0x00a,0x001,0x008,0x00a), // 14x14 |
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array(0x010,0x010,0x00e,0x00e,0x010,0x010,0x00e,0x00e,0x001,0x001,0x001,0x00c,0x00c,0x001,0x00c,0x00c), // 16x16 |
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array(0x012,0x012,0x010,0x010,0x012,0x012,0x010,0x010,0x001,0x001,0x001,0x012,0x00e,0x001,0x012,0x00e), // 18x18 |
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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 |
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array(0x018,0x018,0x016,0x016,0x018,0x018,0x016,0x016,0x001,0x001,0x001,0x024,0x018,0x001,0x024,0x018), // 24x24 |
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array(0x01a,0x01a,0x018,0x018,0x01a,0x01a,0x018,0x018,0x001,0x001,0x001,0x02c,0x01c,0x001,0x02c,0x01c), // 26x26 |
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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 |
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array(0x02c,0x02c,0x028,0x028,0x016,0x016,0x014,0x014,0x002,0x002,0x004,0x090,0x038,0x001,0x090,0x038), // 44x44 |
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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 |
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array(0x040,0x040,0x038,0x038,0x010,0x010,0x00e,0x00e,0x004,0x004,0x010,0x118,0x070,0x002,0x08c,0x038), // 64x64 |
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array(0x048,0x048,0x040,0x040,0x012,0x012,0x010,0x010,0x004,0x004,0x010,0x170,0x090,0x004,0x05c,0x024), // 72x72 |
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array(0x050,0x050,0x048,0x048,0x014,0x014,0x012,0x012,0x004,0x004,0x010,0x1c8,0x0c0,0x004,0x072,0x030), // 80x80 |
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array(0x058,0x058,0x050,0x050,0x016,0x016,0x014,0x014,0x004,0x004,0x010,0x240,0x0e0,0x004,0x090,0x038), // 88x88 |
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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 |
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array(0x078,0x078,0x06c,0x06c,0x014,0x014,0x012,0x012,0x006,0x006,0x024,0x41a,0x198,0x006,0x0af,0x044), // 120x120 |
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array(0x084,0x084,0x078,0x078,0x016,0x016,0x014,0x014,0x006,0x006,0x024,0x518,0x1f0,0x008,0x0a3,0x03e), // 132x132 |
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array(0x090,0x090,0x084,0x084,0x018,0x018,0x016,0x016,0x006,0x006,0x024,0x616,0x26c,0x00a,0x09c,0x03e), // 144x144 |
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// rectangular form (currently unused) --------------------------------------------------------------------------- |
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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 |
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array(0x00c,0x01a,0x00a,0x018,0x00c,0x01a,0x00a,0x018,0x001,0x001,0x001,0x010,0x00e,0x001,0x010,0x00e), // 12x26 |
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array(0x00c,0x024,0x00a,0x020,0x00c,0x012,0x00a,0x010,0x001,0x002,0x002,0x00c,0x012,0x001,0x00c,0x012), // 12x36 |
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array(0x010,0x024,0x00e,0x020,0x010,0x012,0x00e,0x010,0x001,0x002,0x002,0x020,0x018,0x001,0x020,0x018), // 16x36 |
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array(0x010,0x030,0x00e,0x02c,0x010,0x018,0x00e,0x016,0x001,0x002,0x002,0x031,0x01c,0x001,0x031,0x01c) // 16x48 |
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); |
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|
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/** |
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* Map encodation modes whit character sets. |
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* @protected |
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*/ |
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protected $chset_id = array(ENC_C40 => 'C40', ENC_TXT => 'TXT', ENC_X12 =>'X12'); |
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|
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/** |
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* Basic set of charactes for each encodation mode. |
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* @protected |
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*/ |
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protected $chset = array( |
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'C40' => array( // Basic set for C40 ---------------------------------------------------------------------------- |
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'S1'=>0x00,'S2'=>0x01,'S3'=>0x02,0x20=>0x03,0x30=>0x04,0x31=>0x05,0x32=>0x06,0x33=>0x07,0x34=>0x08,0x35=>0x09, // |
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0x36=>0x0a,0x37=>0x0b,0x38=>0x0c,0x39=>0x0d,0x41=>0x0e,0x42=>0x0f,0x43=>0x10,0x44=>0x11,0x45=>0x12,0x46=>0x13, // |
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0x47=>0x14,0x48=>0x15,0x49=>0x16,0x4a=>0x17,0x4b=>0x18,0x4c=>0x19,0x4d=>0x1a,0x4e=>0x1b,0x4f=>0x1c,0x50=>0x1d, // |
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0x51=>0x1e,0x52=>0x1f,0x53=>0x20,0x54=>0x21,0x55=>0x22,0x56=>0x23,0x57=>0x24,0x58=>0x25,0x59=>0x26,0x5a=>0x27),// |
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'TXT' => array( // Basic set for TEXT --------------------------------------------------------------------------- |
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'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 $code (string) Code to represent using Datamatrix. |
| 233 |
* @public |
| 234 |
*/ |
| 235 |
public function __construct($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] > $nd) { |
| 258 |
// add padding |
| 259 |
if ($this->last_enc == ENC_EDF) { |
| 260 |
// switch to ASCII encoding |
| 261 |
$cw[] = 124; |
| 262 |
++$nd; |
| 263 |
} elseif (($this->last_enc != ENC_ASCII) AND ($this->last_enc != ENC_BASE256)) { |
| 264 |
// switch to ASCII encoding |
| 265 |
$cw[] = 254; |
| 266 |
++$nd; |
| 267 |
} |
| 268 |
if ($params[11] > $nd) { |
| 269 |
// add first pad |
| 270 |
$cw[] = 129; |
| 271 |
++$nd; |
| 272 |
// add remaining pads |
| 273 |
for ($i = $nd; $i <= $params[11]; ++$i) { |
| 274 |
$cw[] = $this->get253StateCodeword(129, $i); |
| 275 |
} |
| 276 |
} |
| 277 |
} |
| 278 |
// add error correction codewords |
| 279 |
$cw = $this->getErrorCorrection($cw, $params[13], $params[14], $params[15]); |
| 280 |
// initialize empty arrays |
| 281 |
$grid = array_fill(0, ($params[2] * $params[3]), 0); |
| 282 |
// get placement map |
| 283 |
$places = $this->getPlacemetMap($params[2], $params[3]); |
| 284 |
// fill the grid with data |
| 285 |
$grid = array(); |
| 286 |
$i = 0; |
| 287 |
// region data row max index |
| 288 |
$rdri = ($params[4] - 1); |
| 289 |
// region data column max index |
| 290 |
$rdci = ($params[5] - 1); |
| 291 |
// for each vertical region |
| 292 |
for ($vr = 0; $vr < $params[9]; ++$vr) { |
| 293 |
// for each row on region |
| 294 |
for ($r = 0; $r < $params[4]; ++$r) { |
| 295 |
// get row |
| 296 |
$row = (($vr * $params[4]) + $r); |
| 297 |
// for each horizontal region |
| 298 |
for ($hr = 0; $hr < $params[8]; ++$hr) { |
| 299 |
// for each column on region |
| 300 |
for ($c = 0; $c < $params[5]; ++$c) { |
| 301 |
// get column |
| 302 |
$col = (($hr * $params[5]) + $c); |
| 303 |
// braw bits by case |
| 304 |
if ($r == 0) { |
| 305 |
// top finder pattern |
| 306 |
if ($c % 2) { |
| 307 |
$grid[$row][$col] = 0; |
| 308 |
} else { |
| 309 |
$grid[$row][$col] = 1; |
| 310 |
} |
| 311 |
} elseif ($r == $rdri) { |
| 312 |
// bottom finder pattern |
| 313 |
$grid[$row][$col] = 1; |
| 314 |
} elseif ($c == 0) { |
| 315 |
// left finder pattern |
| 316 |
$grid[$row][$col] = 1; |
| 317 |
} elseif ($c == $rdci) { |
| 318 |
// right finder pattern |
| 319 |
if ($r % 2) { |
| 320 |
$grid[$row][$col] = 1; |
| 321 |
} else { |
| 322 |
$grid[$row][$col] = 0; |
| 323 |
} |
| 324 |
} else { // data bit |
| 325 |
if ($places[$i] < 2) { |
| 326 |
$grid[$row][$col] = $places[$i]; |
| 327 |
} else { |
| 328 |
// codeword ID |
| 329 |
$cw_id = (floor($places[$i] / 10) - 1); |
| 330 |
// codeword BIT mask |
| 331 |
$cw_bit = pow(2, (8 - ($places[$i] % 10))); |
| 332 |
$grid[$row][$col] = (($cw[$cw_id] & $cw_bit) == 0) ? 0 : 1; |
| 333 |
} |
| 334 |
++$i; |
| 335 |
} |
| 336 |
} |
| 337 |
} |
| 338 |
} |
| 339 |
} |
| 340 |
$this->barcode_array['num_rows'] = $params[0]; |
| 341 |
$this->barcode_array['num_cols'] = $params[1]; |
| 342 |
$this->barcode_array['bcode'] = $grid; |
| 343 |
} |
| 344 |
|
| 345 |
/** |
| 346 |
* Returns a barcode array which is readable by TCPDF |
| 347 |
* @return array barcode array readable by TCPDF; |
| 348 |
* @public |
| 349 |
*/ |
| 350 |
public function getBarcodeArray() { |
| 351 |
return $this->barcode_array; |
| 352 |
} |
| 353 |
|
| 354 |
/** |
| 355 |
* Product of two numbers in a Power-of-Two Galois Field |
| 356 |
* @param $a (int) first number to multiply. |
| 357 |
* @param $b (int) second number to multiply. |
| 358 |
* @param $log (array) Log table. |
| 359 |
* @param $alog (array) Anti-Log table. |
| 360 |
* @param $gf (array) Number of Factors of the Reed-Solomon polynomial. |
| 361 |
* @return int product |
| 362 |
* @protected |
| 363 |
*/ |
| 364 |
protected function getGFProduct($a, $b, $log, $alog, $gf) { |
| 365 |
if (($a == 0) OR ($b == 0)) { |
| 366 |
return 0; |
| 367 |
} |
| 368 |
return $alog[($log[$a] + $log[$b]) % ($gf - 1)]; |
| 369 |
} |
| 370 |
|
| 371 |
/** |
| 372 |
* Add error correction codewords to data codewords array (ANNEX E). |
| 373 |
* @param $wd (array) Array of datacodewords. |
| 374 |
* @param $nb (int) Number of blocks. |
| 375 |
* @param $nd (int) Number of data codewords per block. |
| 376 |
* @param $nc (int) Number of correction codewords per block. |
| 377 |
* @param $gf (int) numner of fields on log/antilog table (power of 2). |
| 378 |
* @param $pp (int) The value of its prime modulus polynomial (301 for ECC200). |
| 379 |
* @return array data codewords + error codewords |
| 380 |
* @protected |
| 381 |
*/ |
| 382 |
protected function getErrorCorrection($wd, $nb, $nd, $nc, $gf=256, $pp=301) { |
| 383 |
// generate the log ($log) and antilog ($alog) tables |
| 384 |
$log[0] = 0; |
| 385 |
$alog[0] = 1; |
| 386 |
for ($i = 1; $i < $gf; ++$i) { |
| 387 |
$alog[$i] = ($alog[($i - 1)] * 2); |
| 388 |
if ($alog[$i] >= $gf) { |
| 389 |
$alog[$i] ^= $pp; |
| 390 |
} |
| 391 |
$log[$alog[$i]] = $i; |
| 392 |
} |
| 393 |
ksort($log); |
| 394 |
// generate the polynomial coefficients (c) |
| 395 |
$c = array_fill(0, ($nc + 1), 0); |
| 396 |
$c[0] = 1; |
| 397 |
for ($i = 1; $i <= $nc; ++$i) { |
| 398 |
$c[$i] = $c[($i-1)]; |
| 399 |
for ($j = ($i - 1); $j >= 1; --$j) { |
| 400 |
$c[$j] = $c[($j - 1)] ^ $this->getGFProduct($c[$j], $alog[$i], $log, $alog, $gf); |
| 401 |
} |
| 402 |
$c[0] = $this->getGFProduct($c[0], $alog[$i], $log, $alog, $gf); |
| 403 |
} |
| 404 |
ksort($c); |
| 405 |
// total number of data codewords |
| 406 |
$num_wd = ($nb * $nd); |
| 407 |
// total number of error codewords |
| 408 |
$num_we = ($nb * $nc); |
| 409 |
// for each block |
| 410 |
for ($b = 0; $b < $nb; ++$b) { |
| 411 |
// create interleaved data block |
| 412 |
$block = array(); |
| 413 |
for ($n = $b; $n < $num_wd; $n += $nb) { |
| 414 |
$block[] = $wd[$n]; |
| 415 |
} |
| 416 |
// initialize error codewords |
| 417 |
$we = array_fill(0, ($nc + 1), 0); |
| 418 |
// calculate error correction codewords for this block |
| 419 |
for ($i = 0; $i < $nd; ++$i) { |
| 420 |
$k = ($we[0] ^ $block[$i]); |
| 421 |
for ($j = 0; $j < $nc; ++$j) { |
| 422 |
$we[$j] = ($we[($j + 1)] ^ $this->getGFProduct($k, $c[($nc - $j - 1)], $log, $alog, $gf)); |
| 423 |
} |
| 424 |
} |
| 425 |
// add error codewords at the end of data codewords |
| 426 |
$j = 0; |
| 427 |
for ($i = $b; $i < $num_we; $i += $nb) { |
| 428 |
$wd[($num_wd + $i)] = $we[$j]; |
| 429 |
++$j; |
| 430 |
} |
| 431 |
} |
| 432 |
// reorder codewords |
| 433 |
ksort($wd); |
| 434 |
return $wd; |
| 435 |
} |
| 436 |
|
| 437 |
/** |
| 438 |
* Return the 253-state codeword |
| 439 |
* @param $cwpad (int) Pad codeword. |
| 440 |
* @param $cwpos (int) Number of data codewords from the beginning of encoded data. |
| 441 |
* @return pad codeword |
| 442 |
* @protected |
| 443 |
*/ |
| 444 |
protected function get253StateCodeword($cwpad, $cwpos) { |
| 445 |
$pad = ($cwpad + (((149 * $cwpos) % 253) + 1)); |
| 446 |
if ($pad > 254) { |
| 447 |
$pad -= 254; |
| 448 |
} |
| 449 |
return $pad; |
| 450 |
} |
| 451 |
|
| 452 |
/** |
| 453 |
* Return the 255-state codeword |
| 454 |
* @param $cwpad (int) Pad codeword. |
| 455 |
* @param $cwpos (int) Number of data codewords from the beginning of encoded data. |
| 456 |
* @return pad codeword |
| 457 |
* @protected |
| 458 |
*/ |
| 459 |
protected function get255StateCodeword($cwpad, $cwpos) { |
| 460 |
$pad = ($cwpad + (((149 * $cwpos) % 255) + 1)); |
| 461 |
if ($pad > 255) { |
| 462 |
$pad -= 256; |
| 463 |
} |
| 464 |
return $pad; |
| 465 |
} |
| 466 |
|
| 467 |
/** |
| 468 |
* Returns true if the char belongs to the selected mode |
| 469 |
* @param $chr (int) Character (byte) to check. |
| 470 |
* @param $mode (int) Current encoding mode. |
| 471 |
* @return boolean true if the char is of the selected mode. |
| 472 |
* @protected |
| 473 |
*/ |
| 474 |
protected function isCharMode($chr, $mode) { |
| 475 |
$status = false; |
| 476 |
switch ($mode) { |
| 477 |
case ENC_ASCII: { // ASCII character 0 to 127 |
| 478 |
$status = (($chr >= 0) AND ($chr <= 127)); |
| 479 |
break; |
| 480 |
} |
| 481 |
case ENC_C40: { // Upper-case alphanumeric |
| 482 |
$status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 65) AND ($chr <= 90))); |
| 483 |
break; |
| 484 |
} |
| 485 |
case ENC_TXT: { // Lower-case alphanumeric |
| 486 |
$status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 97) AND ($chr <= 122))); |
| 487 |
break; |
| 488 |
} |
| 489 |
case ENC_X12: { // ANSI X12 |
| 490 |
$status = (($chr == 13) OR ($chr == 42) OR ($chr == 62)); |
| 491 |
break; |
| 492 |
} |
| 493 |
case ENC_EDF: { // ASCII character 32 to 94 |
| 494 |
$status = (($chr >= 32) AND ($chr <= 94)); |
| 495 |
break; |
| 496 |
} |
| 497 |
case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page) |
| 498 |
$status = (($chr == 232) OR ($chr == 233) OR ($chr == 234) OR ($chr == 241)); |
| 499 |
break; |
| 500 |
} |
| 501 |
case ENC_ASCII_EXT: { // ASCII character 128 to 255 |
| 502 |
$status = (($chr >= 128) AND ($chr <= 255)); |
| 503 |
break; |
| 504 |
} |
| 505 |
case ENC_ASCII_NUM: { // ASCII digits |
| 506 |
$status = (($chr >= 48) AND ($chr <= 57)); |
| 507 |
break; |
| 508 |
} |
| 509 |
} |
| 510 |
return $status; |
| 511 |
} |
| 512 |
|
| 513 |
/** |
| 514 |
* The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S). |
| 515 |
* @param $data (string) data to encode |
| 516 |
* @param $pos (int) current position |
| 517 |
* @param $mode (int) current encoding mode |
| 518 |
* @return int encoding mode |
| 519 |
* @protected |
| 520 |
*/ |
| 521 |
protected function lookAheadTest($data, $pos, $mode) { |
| 522 |
$data_length = strlen($data); |
| 523 |
if ($pos >= $data_length) { |
| 524 |
return $mode; |
| 525 |
} |
| 526 |
$charscount = 0; // count processed chars |
| 527 |
// STEP J |
| 528 |
if ($mode == ENC_ASCII) { |
| 529 |
$numch = array(0, 1, 1, 1, 1, 1.25); |
| 530 |
} else { |
| 531 |
$numch = array(1, 2, 2, 2, 2, 2.25); |
| 532 |
$numch[$mode] = 0; |
| 533 |
} |
| 534 |
while (true) { |
| 535 |
// STEP K |
| 536 |
if (($pos + $charscount) == $data_length) { |
| 537 |
if ($numch[ENC_ASCII] <= ceil(min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) { |
| 538 |
return ENC_ASCII; |
| 539 |
} |
| 540 |
if ($numch[ENC_BASE256] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) { |
| 541 |
return ENC_BASE256; |
| 542 |
} |
| 543 |
if ($numch[ENC_EDF] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256]))) { |
| 544 |
return ENC_EDF; |
| 545 |
} |
| 546 |
if ($numch[ENC_TXT] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) { |
| 547 |
return ENC_TXT; |
| 548 |
} |
| 549 |
if ($numch[ENC_X12] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256]))) { |
| 550 |
return ENC_X12; |
| 551 |
} |
| 552 |
return ENC_C40; |
| 553 |
} |
| 554 |
// get char |
| 555 |
$chr = ord($data{($pos + $charscount)}); |
| 556 |
$charscount++; |
| 557 |
// STEP L |
| 558 |
if ($this->isCharMode($chr, ENC_ASCII_NUM)) { |
| 559 |
$numch[ENC_ASCII] += (1 / 2); |
| 560 |
} elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { |
| 561 |
$numch[ENC_ASCII] = ceil($numch[ENC_ASCII]); |
| 562 |
$numch[ENC_ASCII] += 2; |
| 563 |
} else { |
| 564 |
$numch[ENC_ASCII] = ceil($numch[ENC_ASCII]); |
| 565 |
$numch[ENC_ASCII] += 1; |
| 566 |
} |
| 567 |
// STEP M |
| 568 |
if ($this->isCharMode($chr, ENC_C40)) { |
| 569 |
$numch[ENC_C40] += (2 / 3); |
| 570 |
} elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { |
| 571 |
$numch[ENC_C40] += (8 / 3); |
| 572 |
} else { |
| 573 |
$numch[ENC_C40] += (4 / 3); |
| 574 |
} |
| 575 |
// STEP N |
| 576 |
if ($this->isCharMode($chr, ENC_TXT)) { |
| 577 |
$numch[ENC_TXT] += (2 / 3); |
| 578 |
} elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { |
| 579 |
$numch[ENC_TXT] += (8 / 3); |
| 580 |
} else { |
| 581 |
$numch[ENC_TXT] += (4 / 3); |
| 582 |
} |
| 583 |
// STEP O |
| 584 |
if ($this->isCharMode($chr, ENC_X12) OR $this->isCharMode($chr, ENC_C40)) { |
| 585 |
$numch[ENC_X12] += (2 / 3); |
| 586 |
} elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { |
| 587 |
$numch[ENC_X12] += (13 / 3); |
| 588 |
} else { |
| 589 |
$numch[ENC_X12] += (10 / 3); |
| 590 |
} |
| 591 |
// STEP P |
| 592 |
if ($this->isCharMode($chr, ENC_EDF)) { |
| 593 |
$numch[ENC_EDF] += (3 / 4); |
| 594 |
} elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { |
| 595 |
$numch[ENC_EDF] += (17 / 4); |
| 596 |
} else { |
| 597 |
$numch[ENC_EDF] += (13 / 4); |
| 598 |
} |
| 599 |
// STEP Q |
| 600 |
if ($this->isCharMode($chr, ENC_BASE256)) { |
| 601 |
$numch[ENC_BASE256] += 4; |
| 602 |
} else { |
| 603 |
$numch[ENC_BASE256] += 1; |
| 604 |
} |
| 605 |
// STEP R |
| 606 |
if ($charscount >= 4) { |
| 607 |
if (($numch[ENC_ASCII] + 1) <= min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) { |
| 608 |
return ENC_ASCII; |
| 609 |
} |
| 610 |
if ((($numch[ENC_BASE256] + 1) <= $numch[ENC_ASCII]) |
| 611 |
OR (($numch[ENC_BASE256] + 1) < min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) { |
| 612 |
return ENC_BASE256; |
| 613 |
} |
| 614 |
if (($numch[ENC_EDF] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256])) { |
| 615 |
return ENC_EDF; |
| 616 |
} |
| 617 |
if (($numch[ENC_TXT] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) { |
| 618 |
return ENC_TXT; |
| 619 |
} |
| 620 |
if (($numch[ENC_X12] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) { |
| 621 |
return ENC_X12; |
| 622 |
} |
| 623 |
if (($numch[ENC_C40] + 1) < min($numch[ENC_ASCII], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) { |
| 624 |
if ($numch[ENC_C40] < $numch[ENC_X12]) { |
| 625 |
return ENC_C40; |
| 626 |
} |
| 627 |
if ($numch[ENC_C40] == $numch[ENC_X12]) { |
| 628 |
$k = ($pos + $charscount + 1); |
| 629 |
while ($k < $data_length) { |
| 630 |
$tmpchr = ord($data{$k}); |
| 631 |
if ($this->isCharMode($tmpchr, ENC_X12)) { |
| 632 |
return ENC_X12; |
| 633 |
} elseif (!($this->isCharMode($tmpchr, ENC_X12) OR $this->isCharMode($tmpchr, ENC_C40))) { |
| 634 |
break; |
| 635 |
} |
| 636 |
++$k; |
| 637 |
} |
| 638 |
return ENC_C40; |
| 639 |
} |
| 640 |
} |
| 641 |
} |
| 642 |
} // end of while |
| 643 |
} |
| 644 |
|
| 645 |
/** |
| 646 |
* Get the switching codeword to a new encoding mode (latch codeword) |
| 647 |
* @param $mode (int) New encoding mode. |
| 648 |
* @return (int) Switch codeword. |
| 649 |
* @protected |
| 650 |
*/ |
| 651 |
protected function getSwitchEncodingCodeword($mode) { |
| 652 |
switch ($mode) { |
| 653 |
case ENC_ASCII: { // ASCII character 0 to 127 |
| 654 |
$cw = 254; |
| 655 |
break; |
| 656 |
} |
| 657 |
case ENC_C40: { // Upper-case alphanumeric |
| 658 |
$cw = 230; |
| 659 |
break; |
| 660 |
} |
| 661 |
case ENC_TXT: { // Lower-case alphanumeric |
| 662 |
$cw = 239; |
| 663 |
break; |
| 664 |
} |
| 665 |
case ENC_X12: { // ANSI X12 |
| 666 |
$cw = 238; |
| 667 |
break; |
| 668 |
} |
| 669 |
case ENC_EDF: { // ASCII character 32 to 94 |
| 670 |
$cw = 240; |
| 671 |
break; |
| 672 |
} |
| 673 |
case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page) |
| 674 |
$cw = 231; |
| 675 |
break; |
| 676 |
} |
| 677 |
} |
| 678 |
return $cw; |
| 679 |
} |
| 680 |
|
| 681 |
/** |
| 682 |
* Choose the minimum matrix size and return the max number of data codewords. |
| 683 |
* @param $numcw (int) Number of current codewords. |
| 684 |
* @return number of data codewords in matrix |
| 685 |
* @protected |
| 686 |
*/ |
| 687 |
protected function getMaxDataCodewords($numcw) { |
| 688 |
foreach ($this->symbattr as $key => $matrix) { |
| 689 |
if ($matrix[11] >= $numcw) { |
| 690 |
return $matrix[11]; |
| 691 |
} |
| 692 |
} |
| 693 |
return 0; |
| 694 |
} |
| 695 |
|
| 696 |
/** |
| 697 |
* Get high level encoding using the minimum symbol data characters for ECC 200 |
| 698 |
* @param $data (string) data to encode |
| 699 |
* @return array of codewords |
| 700 |
* @protected |
| 701 |
*/ |
| 702 |
protected function getHighLevelEncoding($data) { |
| 703 |
// STEP A. Start in ASCII encodation. |
| 704 |
$enc = ENC_ASCII; // current encoding mode |
| 705 |
$pos = 0; // current position |
| 706 |
$cw = array(); // array of codewords to be returned |
| 707 |
$cw_num = 0; // number of data codewords |
| 708 |
$data_lenght = strlen($data); // number of chars |
| 709 |
while ($pos < $data_lenght) { |
| 710 |
switch ($enc) { |
| 711 |
case ENC_ASCII: { // STEP B. While in ASCII encodation |
| 712 |
if (($data_lenght > 1) AND ($pos < ($data_lenght - 1)) AND ($this->isCharMode(ord($data{($pos)}), ENC_ASCII_NUM) AND $this->isCharMode(ord($data{($pos + 1)}), ENC_ASCII_NUM))) { |
| 713 |
// 1. If the next data sequence is at least 2 consecutive digits, encode the next two digits as a double digit in ASCII mode. |
| 714 |
$cw[] = (intval(substr($data, $pos, 2)) + 130); |
| 715 |
++$cw_num; |
| 716 |
$pos += 2; |
| 717 |
} else { |
| 718 |
// 2. If the look-ahead test (starting at step J) indicates another mode, switch to that mode. |
| 719 |
$newenc = $this->lookAheadTest($data, $pos, $enc); |
| 720 |
if ($newenc != $enc) { |
| 721 |
// switch to new encoding |
| 722 |
$enc = $newenc; |
| 723 |
$cw[] = $this->getSwitchEncodingCodeword($enc); |
| 724 |
++$cw_num; |
| 725 |
} else { |
| 726 |
// get new byte |
| 727 |
$chr = ord($data{($pos)}); |
| 728 |
++$pos; |
| 729 |
if ($this->isCharMode($chr, ENC_ASCII_EXT)) { |
| 730 |
// 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. |
| 731 |
$cw[] = 235; |
| 732 |
$cw[] = ($chr - 127); |
| 733 |
$cw_num += 2; |
| 734 |
} else { |
| 735 |
// 4. Otherwise process the next data character in ASCII encodation. |
| 736 |
$cw[] = ($chr + 1); |
| 737 |
++$cw_num; |
| 738 |
} |
| 739 |
} |
| 740 |
} |
| 741 |
break; |
| 742 |
} |
| 743 |
case ENC_C40 : // Upper-case alphanumeric |
| 744 |
case ENC_TXT : // Lower-case alphanumeric |
| 745 |
case ENC_X12 : { // ANSI X12 |
| 746 |
$temp_cw = array(); |
| 747 |
$p = 0; |
| 748 |
$epos = $pos; |
| 749 |
// get charset ID |
| 750 |
$set_id = $this->chset_id[$enc]; |
| 751 |
// get basic charset for current encoding |
| 752 |
$charset = $this->chset[$set_id]; |
| 753 |
do { |
| 754 |
// 2. process the next character in C40 encodation. |
| 755 |
$chr = ord($data{($epos)}); |
| 756 |
++$epos; |
| 757 |
// check for extended character |
| 758 |
if ($chr & 0x80) { |
| 759 |
if ($enc == ENC_X12) { |
| 760 |
return false; |
| 761 |
} |
| 762 |
$chr = ($chr & 0x7f); |
| 763 |
$temp_cw[] = 1; // shift 2 |
| 764 |
$temp_cw[] = 30; // upper shift |
| 765 |
$p += 2; |
| 766 |
} |
| 767 |
if (isset($charset[$chr])) { |
| 768 |
$temp_cw[] = $charset[$chr]; |
| 769 |
++$p; |
| 770 |
} else { |
| 771 |
if (isset($this->chset['SH1'][$chr])) { |
| 772 |
$temp_cw[] = 0; // shift 1 |
| 773 |
$shiftset = $this->chset['SH1']; |
| 774 |
} elseif (isset($chr, $this->chset['SH2'][$chr])) { |
| 775 |
$temp_cw[] = 1; // shift 2 |
| 776 |
$shiftset = $this->chset['SH2']; |
| 777 |
} elseif (($enc == ENC_C40) AND isset($this->chset['S3C'][$chr])) { |
| 778 |
$temp_cw[] = 2; // shift 3 |
| 779 |
$shiftset = $this->chset['S3C']; |
| 780 |
} elseif (($enc == ENC_TXT) AND isset($this->chset['S3T'][$chr])) { |
| 781 |
$temp_cw[] = 2; // shift 3 |
| 782 |
$shiftset = $this->chset['S3T']; |
| 783 |
} else { |
| 784 |
return false; |
| 785 |
} |
| 786 |
$temp_cw[] = $shiftset[$chr]; |
| 787 |
$p += 2; |
| 788 |
} |
| 789 |
if ($p >= 3) { |
| 790 |
$c1 = array_shift($temp_cw); |
| 791 |
$c2 = array_shift($temp_cw); |
| 792 |
$c3 = array_shift($temp_cw); |
| 793 |
$p -= 3; |
| 794 |
$tmp = ((1600 * $c1) + (40 * $c2) + $c3 + 1); |
| 795 |
$cw[] = ($tmp >> 8); |
| 796 |
$cw[] = ($tmp % 256); |
| 797 |
$cw_num += 2; |
| 798 |
$pos = $epos; |
| 799 |
// 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. |
| 800 |
$newenc = $this->lookAheadTest($data, $pos, $enc); |
| 801 |
if ($newenc != $enc) { |
| 802 |
$enc = $newenc; |
| 803 |
$cw[] = $this->getSwitchEncodingCodeword($enc); |
| 804 |
++$cw_num; |
| 805 |
break; |
| 806 |
} |
| 807 |
} |
| 808 |
} while (($p > 0) AND ($epos < $data_lenght)); |
| 809 |
// process last data (if any) |
| 810 |
if ($p > 0) { |
| 811 |
// get remaining number of data symbols |
| 812 |
$cwr = ($this->getMaxDataCodewords($cw_num + 2) - $cw_num); |
| 813 |
if (($cwr == 1) AND ($p == 1)) { |
| 814 |
// d. If one symbol character remains and one C40 value (data character) remains to be encoded |
| 815 |
$c1 = array_shift($temp_cw); |
| 816 |
--$p; |
| 817 |
$cw[] = ($c1 + 1); |
| 818 |
++$cw_num; |
| 819 |
} elseif (($cwr == 2) AND ($p == 1)) { |
| 820 |
// c. If two symbol characters remain and only one C40 value (data character) remains to be encoded |
| 821 |
$c1 = array_shift($temp_cw); |
| 822 |
--$p; |
| 823 |
$cw[] = 254; |
| 824 |
$cw[] = ($c1 + 1); |
| 825 |
$cw_num += 2; |
| 826 |
} elseif (($cwr == 2) AND ($p == 2)) { |
| 827 |
// b. If two symbol characters remain and two C40 values remain to be encoded |
| 828 |
$c1 = array_shift($temp_cw); |
| 829 |
$c2 = array_shift($temp_cw); |
| 830 |
$p -= 2; |
| 831 |
$tmp = ((1600 * $c1) + (40 * $c2) + 1); |
| 832 |
$cw[] = ($tmp >> 8); |
| 833 |
$cw[] = ($tmp % 256); |
| 834 |
$cw_num += 2; |
| 835 |
} else { |
| 836 |
// switch to ASCII encoding |
| 837 |
$enc = ENC_ASCII; |
| 838 |
$cw[] = $this->getSwitchEncodingCodeword($enc); |
| 839 |
++$cw_num; |
| 840 |
} |
| 841 |
} |
| 842 |
break; |
| 843 |
} |
| 844 |
case ENC_EDF: { // F. While in EDIFACT (EDF) encodation |
| 845 |
// initialize temporary array with 0 lenght |
| 846 |
$temp_cw = array(); |
| 847 |
$epos = $pos; |
| 848 |
$field_lenght = 0; |
| 849 |
while ($epos < $data_lenght) { |
| 850 |
// 2. process the next character in EDIFACT encodation. |
| 851 |
$chr = ord($data{($epos)}); |
| 852 |
++$epos; |
| 853 |
$temp_cw[] = $chr; |
| 854 |
++$field_lenght; |
| 855 |
if (($field_lenght == 4) OR ($epos == $data_lenght)) { |
| 856 |
if ($field_lenght < 4) { |
| 857 |
// set unlatch character |
| 858 |
$temp_cw[] = 0x1f; |
| 859 |
++$field_lenght; |
| 860 |
$enc = ENC_ASCII; |
| 861 |
// fill empty characters |
| 862 |
for ($i = $field_lenght; $i < 4; ++$i) { |
| 863 |
$temp_cw[] = 0; |
| 864 |
} |
| 865 |
} |
| 866 |
// encodes four data characters in three codewords |
| 867 |
$cw[] = (($temp_cw[0] & 0x3F) << 2) + (($temp_cw[1] & 0x30) >> 4); |
| 868 |
$cw[] = (($temp_cw[1] & 0x0F) << 4) + (($temp_cw[2] & 0x3C) >> 2); |
| 869 |
$cw[] = (($temp_cw[2] & 0x03) << 6) + ($temp_cw[3] & 0x3F); |
| 870 |
$cw_num += 3; |
| 871 |
$temp_cw = array(); |
| 872 |
$pos = $epos; |
| 873 |
$field_lenght = 0; |
| 874 |
} |
| 875 |
// 1. If the EDIFACT encoding is at the point of starting a new triple symbol character and if the look-ahead test (starting at step J) indicates another mode, switch to that mode. |
| 876 |
if ($field_lenght == 0) { |
| 877 |
// get remaining number of data symbols |
| 878 |
$cwr = ($this->getMaxDataCodewords($cw_num + 2) - $cw_num); |
| 879 |
if ($cwr < 3) { |
| 880 |
// return to ascii without unlatch |
| 881 |
$enc = ENC_ASCII; |
| 882 |
break; // exit from EDIFACT mode |
| 883 |
} else { |
| 884 |
$newenc = $this->lookAheadTest($data, $pos, $enc); |
| 885 |
if ($newenc != $enc) { |
| 886 |
// 1. If the look-ahead test (starting at step J) indicates another mode, switch to that mode. |
| 887 |
$enc = $newenc; |
| 888 |
$cw[] = $this->getSwitchEncodingCodeword($enc); |
| 889 |
++$cw_num; |
| 890 |
break; // exit from EDIFACT mode |
| 891 |
} |
| 892 |
} |
| 893 |
} |
| 894 |
} |
| 895 |
break; |
| 896 |
} |
| 897 |
case ENC_BASE256: { // G. While in Base 256 (B256) encodation |
| 898 |
// initialize temporary array with 0 lenght |
| 899 |
$temp_cw = array(); |
| 900 |
$field_lenght = 0; |
| 901 |
while (($pos < $data_lenght) AND ($field_lenght <= 1555)) { |
| 902 |
$newenc = $this->lookAheadTest($data, $pos, $enc); |
| 903 |
if ($newenc != $enc) { |
| 904 |
// 1. If the look-ahead test (starting at step J) indicates another mode, switch to that mode. |
| 905 |
$enc = $newenc; |
| 906 |
$cw[] = $this->getSwitchEncodingCodeword($enc); |
| 907 |
++$cw_num; |
| 908 |
break; // exit from B256 mode |
| 909 |
} else { |
| 910 |
// 2. Otherwise, process the next character in Base 256 encodation. |
| 911 |
$chr = ord($data{($pos)}); |
| 912 |
++$pos; |
| 913 |
$temp_cw[] = $chr; |
| 914 |
++$field_lenght; |
| 915 |
} |
| 916 |
} |
| 917 |
// set field lenght |
| 918 |
if ($field_lenght <= 249) { |
| 919 |
$cw[] = $field_lenght; |
| 920 |
++$cw_num; |
| 921 |
} else { |
| 922 |
$cw[] = (floor($field_lenght / 250) + 249); |
| 923 |
$cw[] = ($field_lenght % 250); |
| 924 |
$cw_num += 2; |
| 925 |
} |
| 926 |
if (!empty($temp_cw)) { |
| 927 |
// add B256 field |
| 928 |
foreach ($temp_cw as $p => $cht) { |
| 929 |
$cw[] = $this->get255StateCodeword($chr, ($cw_num + $p)); |
| 930 |
} |
| 931 |
} |
| 932 |
break; |
| 933 |
} |
| 934 |
} // end of switch enc |
| 935 |
} // end of while |
| 936 |
// set last used encoding |
| 937 |
$this->last_enc = $enc; |
| 938 |
return $cw; |
| 939 |
} |
| 940 |
|
| 941 |
/** |
| 942 |
* Places "chr+bit" with appropriate wrapping within array[]. |
| 943 |
* (Annex F - ECC 200 symbol character placement) |
| 944 |
* @param $marr (array) Array of symbols. |
| 945 |
* @param $nrow (int) Number of rows. |
| 946 |
* @param $ncol (int) Number of columns. |
| 947 |
* @param $row (int) Row number. |
| 948 |
* @param $col (int) Column number. |
| 949 |
* @param $chr (int) Char byte. |
| 950 |
* @param $bit (int) Bit. |
| 951 |
* @return array |
| 952 |
* @protected |
| 953 |
*/ |
| 954 |
protected function placeModule($marr, $nrow, $ncol, $row, $col, $chr, $bit) { |
| 955 |
if ($row < 0) { |
| 956 |
$row += $nrow; |
| 957 |
$col += (4 - (($nrow + 4) % 8)); |
| 958 |
} |
| 959 |
if ($col < 0) { |
| 960 |
$col += $ncol; |
| 961 |
$row += (4 - (($ncol + 4) % 8)); |
| 962 |
} |
| 963 |
$marr[(($row * $ncol) + $col)] = ((10 * $chr) + $bit); |
| 964 |
return $marr; |
| 965 |
} |
| 966 |
|
| 967 |
/** |
| 968 |
* Places the 8 bits of a utah-shaped symbol character. |
| 969 |
* (Annex F - ECC 200 symbol character placement) |
| 970 |
* @param $marr (array) Array of symbols. |
| 971 |
* @param $nrow (int) Number of rows. |
| 972 |
* @param $ncol (int) Number of columns. |
| 973 |
* @param $row (int) Row number. |
| 974 |
* @param $col (int) Column number. |
| 975 |
* @param $chr (int) Char byte. |
| 976 |
* @return array |
| 977 |
* @protected |
| 978 |
*/ |
| 979 |
protected function placeUtah($marr, $nrow, $ncol, $row, $col, $chr) { |
| 980 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-2, $chr, 1); |
| 981 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-1, $chr, 2); |
| 982 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-2, $chr, 3); |
| 983 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-1, $chr, 4); |
| 984 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col, $chr, 5); |
| 985 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-2, $chr, 6); |
| 986 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-1, $chr, 7); |
| 987 |
$marr = $this->placeModule($marr, $nrow, $ncol, $row, $col, $chr, 8); |
| 988 |
return $marr; |
| 989 |
} |
| 990 |
|
| 991 |
/** |
| 992 |
* Places the 8 bits of the first special corner case. |
| 993 |
* (Annex F - ECC 200 symbol character placement) |
| 994 |
* @param $marr (array) Array of symbols. |
| 995 |
* @param $nrow (int) Number of rows. |
| 996 |
* @param $ncol (int) Number of columns. |
| 997 |
* @param $chr (int) Char byte. |
| 998 |
* @return array |
| 999 |
* @protected |
| 1000 |
*/ |
| 1001 |
protected function placeCornerA($marr, $nrow, $ncol, $chr) { |
| 1002 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1); |
| 1003 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 1, $chr, 2); |
| 1004 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 2, $chr, 3); |
| 1005 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4); |
| 1006 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5); |
| 1007 |
$marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6); |
| 1008 |
$marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7); |
| 1009 |
$marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8); |
| 1010 |
return $marr; |
| 1011 |
} |
| 1012 |
|
| 1013 |
/** |
| 1014 |
* Places the 8 bits of the second special corner case. |
| 1015 |
* (Annex F - ECC 200 symbol character placement) |
| 1016 |
* @param $marr (array) Array of symbols. |
| 1017 |
* @param $nrow (int) Number of rows. |
| 1018 |
* @param $ncol (int) Number of columns. |
| 1019 |
* @param $chr (int) Char byte. |
| 1020 |
* @return array |
| 1021 |
* @protected |
| 1022 |
*/ |
| 1023 |
protected function placeCornerB($marr, $nrow, $ncol, $chr) { |
| 1024 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1); |
| 1025 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2); |
| 1026 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3); |
| 1027 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-4, $chr, 4); |
| 1028 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 5); |
| 1029 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 6); |
| 1030 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 7); |
| 1031 |
$marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8); |
| 1032 |
return $marr; |
| 1033 |
} |
| 1034 |
|
| 1035 |
/** |
| 1036 |
* Places the 8 bits of the third special corner case. |
| 1037 |
* (Annex F - ECC 200 symbol character placement) |
| 1038 |
* @param $marr (array) Array of symbols. |
| 1039 |
* @param $nrow (int) Number of rows. |
| 1040 |
* @param $ncol (int) Number of columns. |
| 1041 |
* @param $chr (int) Char byte. |
| 1042 |
* @return array |
| 1043 |
* @protected |
| 1044 |
*/ |
| 1045 |
protected function placeCornerC($marr, $nrow, $ncol, $chr) { |
| 1046 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1); |
| 1047 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2); |
| 1048 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3); |
| 1049 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4); |
| 1050 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5); |
| 1051 |
$marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6); |
| 1052 |
$marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7); |
| 1053 |
$marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8); |
| 1054 |
return $marr; |
| 1055 |
} |
| 1056 |
|
| 1057 |
/** |
| 1058 |
* Places the 8 bits of the fourth special corner case. |
| 1059 |
* (Annex F - ECC 200 symbol character placement) |
| 1060 |
* @param $marr (array) Array of symbols. |
| 1061 |
* @param $nrow (int) Number of rows. |
| 1062 |
* @param $ncol (int) Number of columns. |
| 1063 |
* @param $chr (int) Char byte. |
| 1064 |
* @return array |
| 1065 |
* @protected |
| 1066 |
*/ |
| 1067 |
protected function placeCornerD($marr, $nrow, $ncol, $chr) { |
| 1068 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1); |
| 1069 |
$marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, $ncol-1, $chr, 2); |
| 1070 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 3); |
| 1071 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4); |
| 1072 |
$marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5); |
| 1073 |
$marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-3, $chr, 6); |
| 1074 |
$marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-2, $chr, 7); |
| 1075 |
$marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8); |
| 1076 |
return $marr; |
| 1077 |
} |
| 1078 |
|
| 1079 |
|
| 1080 |
/** |
| 1081 |
* Build a placement map. |
| 1082 |
* (Annex F - ECC 200 symbol character placement) |
| 1083 |
* @param $nrow (int) Number of rows. |
| 1084 |
* @param $ncol (int) Number of columns. |
| 1085 |
* @return array |
| 1086 |
* @protected |
| 1087 |
*/ |
| 1088 |
protected function getPlacemetMap($nrow, $ncol) { |
| 1089 |
// initialize array with zeros |
| 1090 |
$marr = array_fill(0, ($nrow * $ncol), 0); |
| 1091 |
// set starting values |
| 1092 |
$chr = 1; |
| 1093 |
$row = 4; |
| 1094 |
$col = 0; |
| 1095 |
do { |
| 1096 |
// repeatedly first check for one of the special corner cases, then |
| 1097 |
if (($row == $nrow) AND ($col == 0)) { |
| 1098 |
$marr = $this->placeCornerA($marr, $nrow, $ncol, $chr); |
| 1099 |
++$chr; |
| 1100 |
} |
| 1101 |
if (($row == ($nrow - 2)) AND ($col == 0) AND ($ncol % 4)) { |
| 1102 |
$marr = $this->placeCornerB($marr, $nrow, $ncol, $chr); |
| 1103 |
++$chr; |
| 1104 |
} |
| 1105 |
if (($row == ($nrow - 2)) AND ($col == 0) AND (($ncol % 8) == 4)) { |
| 1106 |
$marr = $this->placeCornerC($marr, $nrow, $ncol, $chr); |
| 1107 |
++$chr; |
| 1108 |
} |
| 1109 |
if (($row == ($nrow + 4)) AND ($col == 2) AND (!($ncol % 8))) { |
| 1110 |
$marr = $this->placeCornerD($marr, $nrow, $ncol, $chr); |
| 1111 |
++$chr; |
| 1112 |
} |
| 1113 |
// sweep upward diagonally, inserting successive characters, |
| 1114 |
do { |
| 1115 |
if (($row < $nrow) AND ($col >= 0) AND (!$marr[(($row * $ncol) + $col)])) { |
| 1116 |
$marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr); |
| 1117 |
++$chr; |
| 1118 |
} |
| 1119 |
$row -= 2; |
| 1120 |
$col += 2; |
| 1121 |
} while (($row >= 0) AND ($col < $ncol)); |
| 1122 |
++$row; |
| 1123 |
$col += 3; |
| 1124 |
// & then sweep downward diagonally, inserting successive characters,... |
| 1125 |
do { |
| 1126 |
if (($row >= 0) AND ($col < $ncol) AND (!$marr[(($row * $ncol) + $col)])) { |
| 1127 |
$marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr); |
| 1128 |
++$chr; |
| 1129 |
} |
| 1130 |
$row += 2; |
| 1131 |
$col -= 2; |
| 1132 |
} while (($row < $nrow) AND ($col >= 0)); |
| 1133 |
$row += 3; |
| 1134 |
++$col; |
| 1135 |
// ... until the entire array is scanned |
| 1136 |
} while (($row < $nrow) OR ($col < $ncol)); |
| 1137 |
// lastly, if the lower righthand corner is untouched, fill in fixed pattern |
| 1138 |
if (!$marr[(($nrow * $ncol) - 1)]) { |
| 1139 |
$marr[(($nrow * $ncol) - 1)] = 1; |
| 1140 |
$marr[(($nrow * $ncol) - $ncol - 2)] = 1; |
| 1141 |
} |
| 1142 |
return $marr; |
| 1143 |
} |
| 1144 |
|
| 1145 |
} // end DataMatrix class |
| 1146 |
//============================================================+ |
| 1147 |
// END OF FILE |
| 1148 |
//============================================================+ |
| 1149 |
|
