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<?php //============================================================+ // File name : datamatrix.php // Version : 1.0.008 // Begin : 2010-06-07 // Last Update : 2014-05-06 // Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com // License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html) // ------------------------------------------------------------------- // Copyright (C) 2010-2014 Nicola Asuni - Tecnick.com LTD // // This file is part of TCPDF software library. // // TCPDF is free software: you can redistribute it and/or modify it // under the terms of the GNU Lesser General Public License as // published by the Free Software Foundation, either version 3 of the // License, or (at your option) any later version. // // TCPDF is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. // See the GNU Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with TCPDF. If not, see <http://www.gnu.org/licenses/>. // // See LICENSE.TXT file for more information. // ------------------------------------------------------------------- // // DESCRIPTION : // // Class to create DataMatrix ECC 200 barcode arrays for TCPDF class. // DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code. //============================================================+ /** * @file * Class to create DataMatrix ECC 200 barcode arrays for TCPDF class. * DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code. * * @package com.tecnick.tcpdf * @author Nicola Asuni * @version 1.0.008 */ // custom definitions if (!defined('DATAMATRIXDEFS')) { /** * Indicate that definitions for this class are set */ define('DATAMATRIXDEFS', true); // ----------------------------------------------------- } // end of custom definitions // #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*# /** * ASCII encoding: ASCII character 0 to 127 (1 byte per CW) */ define('ENC_ASCII', 0); /** * C40 encoding: Upper-case alphanumeric (3/2 bytes per CW) */ define('ENC_C40', 1); /** * TEXT encoding: Lower-case alphanumeric (3/2 bytes per CW) */ define('ENC_TXT', 2); /** * X12 encoding: ANSI X12 (3/2 byte per CW) */ define('ENC_X12', 3); /** * EDIFACT encoding: ASCII character 32 to 94 (4/3 bytes per CW) */ define('ENC_EDF', 4); /** * BASE 256 encoding: ASCII character 0 to 255 (1 byte per CW) */ define('ENC_BASE256', 5); /** * ASCII extended encoding: ASCII character 128 to 255 (1/2 byte per CW) */ define('ENC_ASCII_EXT', 6); /** * ASCII number encoding: ASCII digits (2 bytes per CW) */ define('ENC_ASCII_NUM', 7); /** * @class Datamatrix * Class to create DataMatrix ECC 200 barcode arrays for TCPDF class. * DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code. * * @package com.tecnick.tcpdf * @author Nicola Asuni * @version 1.0.004 */ class Datamatrix { /** * Barcode array to be returned which is readable by TCPDF. * @protected */ protected $barcode_array = array(); /** * Store last used encoding for data codewords. * @protected */ protected $last_enc = ENC_ASCII; /** * Table of Data Matrix ECC 200 Symbol Attributes:<ul> * <li>total matrix rows (including finder pattern)</li> * <li>total matrix cols (including finder pattern)</li> * <li>total matrix rows (without finder pattern)</li> * <li>total matrix cols (without finder pattern)</li> * <li>region data rows (with finder pattern)</li> * <li>region data col (with finder pattern)</li> * <li>region data rows (without finder pattern)</li> * <li>region data col (without finder pattern)</li> * <li>horizontal regions</li> * <li>vertical regions</li> * <li>regions</li> * <li>data codewords</li> * <li>error codewords</li> * <li>blocks</li> * <li>data codewords per block</li> * <li>error codewords per block</li> * </ul> * @protected */ protected $symbattr = array( // square form --------------------------------------------------------------------------------------- array(0x00a,0x00a,0x008,0x008,0x00a,0x00a,0x008,0x008,0x001,0x001,0x001,0x003,0x005,0x001,0x003,0x005), // 10x10 array(0x00c,0x00c,0x00a,0x00a,0x00c,0x00c,0x00a,0x00a,0x001,0x001,0x001,0x005,0x007,0x001,0x005,0x007), // 12x12 array(0x00e,0x00e,0x00c,0x00c,0x00e,0x00e,0x00c,0x00c,0x001,0x001,0x001,0x008,0x00a,0x001,0x008,0x00a), // 14x14 array(0x010,0x010,0x00e,0x00e,0x010,0x010,0x00e,0x00e,0x001,0x001,0x001,0x00c,0x00c,0x001,0x00c,0x00c), // 16x16 array(0x012,0x012,0x010,0x010,0x012,0x012,0x010,0x010,0x001,0x001,0x001,0x012,0x00e,0x001,0x012,0x00e), // 18x18 array(0x014,0x014,0x012,0x012,0x014,0x014,0x012,0x012,0x001,0x001,0x001,0x016,0x012,0x001,0x016,0x012), // 20x20 array(0x016,0x016,0x014,0x014,0x016,0x016,0x014,0x014,0x001,0x001,0x001,0x01e,0x014,0x001,0x01e,0x014), // 22x22 array(0x018,0x018,0x016,0x016,0x018,0x018,0x016,0x016,0x001,0x001,0x001,0x024,0x018,0x001,0x024,0x018), // 24x24 array(0x01a,0x01a,0x018,0x018,0x01a,0x01a,0x018,0x018,0x001,0x001,0x001,0x02c,0x01c,0x001,0x02c,0x01c), // 26x26 array(0x020,0x020,0x01c,0x01c,0x010,0x010,0x00e,0x00e,0x002,0x002,0x004,0x03e,0x024,0x001,0x03e,0x024), // 32x32 array(0x024,0x024,0x020,0x020,0x012,0x012,0x010,0x010,0x002,0x002,0x004,0x056,0x02a,0x001,0x056,0x02a), // 36x36 array(0x028,0x028,0x024,0x024,0x014,0x014,0x012,0x012,0x002,0x002,0x004,0x072,0x030,0x001,0x072,0x030), // 40x40 array(0x02c,0x02c,0x028,0x028,0x016,0x016,0x014,0x014,0x002,0x002,0x004,0x090,0x038,0x001,0x090,0x038), // 44x44 array(0x030,0x030,0x02c,0x02c,0x018,0x018,0x016,0x016,0x002,0x002,0x004,0x0ae,0x044,0x001,0x0ae,0x044), // 48x48 array(0x034,0x034,0x030,0x030,0x01a,0x01a,0x018,0x018,0x002,0x002,0x004,0x0cc,0x054,0x002,0x066,0x02a), // 52x52 array(0x040,0x040,0x038,0x038,0x010,0x010,0x00e,0x00e,0x004,0x004,0x010,0x118,0x070,0x002,0x08c,0x038), // 64x64 array(0x048,0x048,0x040,0x040,0x012,0x012,0x010,0x010,0x004,0x004,0x010,0x170,0x090,0x004,0x05c,0x024), // 72x72 array(0x050,0x050,0x048,0x048,0x014,0x014,0x012,0x012,0x004,0x004,0x010,0x1c8,0x0c0,0x004,0x072,0x030), // 80x80 array(0x058,0x058,0x050,0x050,0x016,0x016,0x014,0x014,0x004,0x004,0x010,0x240,0x0e0,0x004,0x090,0x038), // 88x88 array(0x060,0x060,0x058,0x058,0x018,0x018,0x016,0x016,0x004,0x004,0x010,0x2b8,0x110,0x004,0x0ae,0x044), // 96x96 array(0x068,0x068,0x060,0x060,0x01a,0x01a,0x018,0x018,0x004,0x004,0x010,0x330,0x150,0x006,0x088,0x038), // 104x104 array(0x078,0x078,0x06c,0x06c,0x014,0x014,0x012,0x012,0x006,0x006,0x024,0x41a,0x198,0x006,0x0af,0x044), // 120x120 array(0x084,0x084,0x078,0x078,0x016,0x016,0x014,0x014,0x006,0x006,0x024,0x518,0x1f0,0x008,0x0a3,0x03e), // 132x132 array(0x090,0x090,0x084,0x084,0x018,0x018,0x016,0x016,0x006,0x006,0x024,0x616,0x26c,0x00a,0x09c,0x03e), // 144x144 // rectangular form (currently unused) --------------------------------------------------------------------------- array(0x008,0x012,0x006,0x010,0x008,0x012,0x006,0x010,0x001,0x001,0x001,0x005,0x007,0x001,0x005,0x007), // 8x18 array(0x008,0x020,0x006,0x01c,0x008,0x010,0x006,0x00e,0x001,0x002,0x002,0x00a,0x00b,0x001,0x00a,0x00b), // 8x32 array(0x00c,0x01a,0x00a,0x018,0x00c,0x01a,0x00a,0x018,0x001,0x001,0x001,0x010,0x00e,0x001,0x010,0x00e), // 12x26 array(0x00c,0x024,0x00a,0x020,0x00c,0x012,0x00a,0x010,0x001,0x002,0x002,0x00c,0x012,0x001,0x00c,0x012), // 12x36 array(0x010,0x024,0x00e,0x020,0x010,0x012,0x00e,0x010,0x001,0x002,0x002,0x020,0x018,0x001,0x020,0x018), // 16x36 array(0x010,0x030,0x00e,0x02c,0x010,0x018,0x00e,0x016,0x001,0x002,0x002,0x031,0x01c,0x001,0x031,0x01c) // 16x48 ); /** * Map encodation modes whit character sets. * @protected */ protected $chset_id = array(ENC_C40 => 'C40', ENC_TXT => 'TXT', ENC_X12 =>'X12'); /** * Basic set of characters for each encodation mode. * @protected */ protected $chset = array( 'C40' => array( // Basic set for C40 ---------------------------------------------------------------------------- 'S1'=>0x00,'S2'=>0x01,'S3'=>0x02,0x20=>0x03,0x30=>0x04,0x31=>0x05,0x32=>0x06,0x33=>0x07,0x34=>0x08,0x35=>0x09, // 0x36=>0x0a,0x37=>0x0b,0x38=>0x0c,0x39=>0x0d,0x41=>0x0e,0x42=>0x0f,0x43=>0x10,0x44=>0x11,0x45=>0x12,0x46=>0x13, // 0x47=>0x14,0x48=>0x15,0x49=>0x16,0x4a=>0x17,0x4b=>0x18,0x4c=>0x19,0x4d=>0x1a,0x4e=>0x1b,0x4f=>0x1c,0x50=>0x1d, // 0x51=>0x1e,0x52=>0x1f,0x53=>0x20,0x54=>0x21,0x55=>0x22,0x56=>0x23,0x57=>0x24,0x58=>0x25,0x59=>0x26,0x5a=>0x27),// 'TXT' => array( // Basic set for TEXT --------------------------------------------------------------------------- 'S1'=>0x00,'S2'=>0x01,'S3'=>0x02,0x20=>0x03,0x30=>0x04,0x31=>0x05,0x32=>0x06,0x33=>0x07,0x34=>0x08,0x35=>0x09, // 0x36=>0x0a,0x37=>0x0b,0x38=>0x0c,0x39=>0x0d,0x61=>0x0e,0x62=>0x0f,0x63=>0x10,0x64=>0x11,0x65=>0x12,0x66=>0x13, // 0x67=>0x14,0x68=>0x15,0x69=>0x16,0x6a=>0x17,0x6b=>0x18,0x6c=>0x19,0x6d=>0x1a,0x6e=>0x1b,0x6f=>0x1c,0x70=>0x1d, // 0x71=>0x1e,0x72=>0x1f,0x73=>0x20,0x74=>0x21,0x75=>0x22,0x76=>0x23,0x77=>0x24,0x78=>0x25,0x79=>0x26,0x7a=>0x27),// 'SH1' => array( // Shift 1 set ---------------------------------------------------------------------------------- 0x00=>0x00,0x01=>0x01,0x02=>0x02,0x03=>0x03,0x04=>0x04,0x05=>0x05,0x06=>0x06,0x07=>0x07,0x08=>0x08,0x09=>0x09, // 0x0a=>0x0a,0x0b=>0x0b,0x0c=>0x0c,0x0d=>0x0d,0x0e=>0x0e,0x0f=>0x0f,0x10=>0x10,0x11=>0x11,0x12=>0x12,0x13=>0x13, // 0x14=>0x14,0x15=>0x15,0x16=>0x16,0x17=>0x17,0x18=>0x18,0x19=>0x19,0x1a=>0x1a,0x1b=>0x1b,0x1c=>0x1c,0x1d=>0x1d, // 0x1e=>0x1e,0x1f=>0x1f), // 'SH2' => array( // Shift 2 set ---------------------------------------------------------------------------------- 0x21=>0x00,0x22=>0x01,0x23=>0x02,0x24=>0x03,0x25=>0x04,0x26=>0x05,0x27=>0x06,0x28=>0x07,0x29=>0x08,0x2a=>0x09, // 0x2b=>0x0a,0x2c=>0x0b,0x2d=>0x0c,0x2e=>0x0d,0x2f=>0x0e,0x3a=>0x0f,0x3b=>0x10,0x3c=>0x11,0x3d=>0x12,0x3e=>0x13, // 0x3f=>0x14,0x40=>0x15,0x5b=>0x16,0x5c=>0x17,0x5d=>0x18,0x5e=>0x19,0x5f=>0x1a,'F1'=>0x1b,'US'=>0x1e), // 'S3C' => array( // Shift 3 set for C40 -------------------------------------------------------------------------- 0x60=>0x00,0x61=>0x01,0x62=>0x02,0x63=>0x03,0x64=>0x04,0x65=>0x05,0x66=>0x06,0x67=>0x07,0x68=>0x08,0x69=>0x09, // 0x6a=>0x0a,0x6b=>0x0b,0x6c=>0x0c,0x6d=>0x0d,0x6e=>0x0e,0x6f=>0x0f,0x70=>0x10,0x71=>0x11,0x72=>0x12,0x73=>0x13, // 0x74=>0x14,0x75=>0x15,0x76=>0x16,0x77=>0x17,0x78=>0x18,0x79=>0x19,0x7a=>0x1a,0x7b=>0x1b,0x7c=>0x1c,0x7d=>0x1d, // 0x7e=>0x1e,0x7f=>0x1f), 'S3T' => array( // Shift 3 set for TEXT ------------------------------------------------------------------------- 0x60=>0x00,0x41=>0x01,0x42=>0x02,0x43=>0x03,0x44=>0x04,0x45=>0x05,0x46=>0x06,0x47=>0x07,0x48=>0x08,0x49=>0x09, // 0x4a=>0x0a,0x4b=>0x0b,0x4c=>0x0c,0x4d=>0x0d,0x4e=>0x0e,0x4f=>0x0f,0x50=>0x10,0x51=>0x11,0x52=>0x12,0x53=>0x13, // 0x54=>0x14,0x55=>0x15,0x56=>0x16,0x57=>0x17,0x58=>0x18,0x59=>0x19,0x5a=>0x1a,0x7b=>0x1b,0x7c=>0x1c,0x7d=>0x1d, // 0x7e=>0x1e,0x7f=>0x1f), // 'X12' => array( // Set for X12 ---------------------------------------------------------------------------------- 0x0d=>0x00,0x2a=>0x01,0x3e=>0x02,0x20=>0x03,0x30=>0x04,0x31=>0x05,0x32=>0x06,0x33=>0x07,0x34=>0x08,0x35=>0x09, // 0x36=>0x0a,0x37=>0x0b,0x38=>0x0c,0x39=>0x0d,0x41=>0x0e,0x42=>0x0f,0x43=>0x10,0x44=>0x11,0x45=>0x12,0x46=>0x13, // 0x47=>0x14,0x48=>0x15,0x49=>0x16,0x4a=>0x17,0x4b=>0x18,0x4c=>0x19,0x4d=>0x1a,0x4e=>0x1b,0x4f=>0x1c,0x50=>0x1d, // 0x51=>0x1e,0x52=>0x1f,0x53=>0x20,0x54=>0x21,0x55=>0x22,0x56=>0x23,0x57=>0x24,0x58=>0x25,0x59=>0x26,0x5a=>0x27) // ); // ----------------------------------------------------------------------------- /** * This is the class constructor. * Creates a datamatrix object * @param string $code Code to represent using Datamatrix. * @public */ public function __construct($code) { $barcode_array = array(); if ((is_null($code)) OR ($code == '\0') OR ($code == '')) { return false; } // get data codewords $cw = $this->getHighLevelEncoding($code); // number of data codewords $nd = count($cw); // check size if ($nd > 1558) { return false; } // get minimum required matrix size. foreach ($this->symbattr as $params) { if ($params[11] >= $nd) { break; } } if ($params[11] < $nd) { // too much data return false; } elseif ($params[11] > $nd) { // add padding if ((($params[11] - $nd) > 1) AND ($cw[($nd - 1)] != 254)) { if ($this->last_enc == ENC_EDF) { // switch to ASCII encoding $cw[] = 124; ++$nd; } elseif (($this->last_enc != ENC_ASCII) AND ($this->last_enc != ENC_BASE256)) { // switch to ASCII encoding $cw[] = 254; ++$nd; } } if ($params[11] > $nd) { // add first pad $cw[] = 129; ++$nd; // add remaining pads for ($i = $nd; $i < $params[11]; ++$i) { $cw[] = $this->get253StateCodeword(129, $i); } } } // add error correction codewords $cw = $this->getErrorCorrection($cw, $params[13], $params[14], $params[15]); // initialize empty arrays $grid = array_fill(0, ($params[2] * $params[3]), 0); // get placement map $places = $this->getPlacementMap($params[2], $params[3]); // fill the grid with data $grid = array(); $i = 0; // region data row max index $rdri = ($params[4] - 1); // region data column max index $rdci = ($params[5] - 1); // for each vertical region for ($vr = 0; $vr < $params[9]; ++$vr) { // for each row on region for ($r = 0; $r < $params[4]; ++$r) { // get row $row = (($vr * $params[4]) + $r); // for each horizontal region for ($hr = 0; $hr < $params[8]; ++$hr) { // for each column on region for ($c = 0; $c < $params[5]; ++$c) { // get column $col = (($hr * $params[5]) + $c); // braw bits by case if ($r == 0) { // top finder pattern if ($c % 2) { $grid[$row][$col] = 0; } else { $grid[$row][$col] = 1; } } elseif ($r == $rdri) { // bottom finder pattern $grid[$row][$col] = 1; } elseif ($c == 0) { // left finder pattern $grid[$row][$col] = 1; } elseif ($c == $rdci) { // right finder pattern if ($r % 2) { $grid[$row][$col] = 1; } else { $grid[$row][$col] = 0; } } else { // data bit if ($places[$i] < 2) { $grid[$row][$col] = $places[$i]; } else { // codeword ID $cw_id = (floor($places[$i] / 10) - 1); // codeword BIT mask $cw_bit = pow(2, (8 - ($places[$i] % 10))); $grid[$row][$col] = (($cw[$cw_id] & $cw_bit) == 0) ? 0 : 1; } ++$i; } } } } } $this->barcode_array['num_rows'] = $params[0]; $this->barcode_array['num_cols'] = $params[1]; $this->barcode_array['bcode'] = $grid; } /** * Returns a barcode array which is readable by TCPDF * @return array barcode array readable by TCPDF; * @public */ public function getBarcodeArray() { return $this->barcode_array; } /** * Product of two numbers in a Power-of-Two Galois Field * @param int $a first number to multiply. * @param int $b second number to multiply. * @param array $log Log table. * @param array $alog Anti-Log table. * @param int $gf Number of Factors of the Reed-Solomon polynomial. * @return int product * @protected */ protected function getGFProduct($a, $b, $log, $alog, $gf) { if (($a == 0) OR ($b == 0)) { return 0; } return ($alog[($log[$a] + $log[$b]) % ($gf - 1)]); } /** * Add error correction codewords to data codewords array (ANNEX E). * @param array $wd Array of datacodewords. * @param int $nb Number of blocks. * @param int $nd Number of data codewords per block. * @param int $nc Number of correction codewords per block. * @param int $gf numner of fields on log/antilog table (power of 2). * @param int $pp The value of its prime modulus polynomial (301 for ECC200). * @return array data codewords + error codewords * @protected */ protected function getErrorCorrection($wd, $nb, $nd, $nc, $gf=256, $pp=301) { // generate the log ($log) and antilog ($alog) tables $log[0] = 0; $alog[0] = 1; for ($i = 1; $i < $gf; ++$i) { $alog[$i] = ($alog[($i - 1)] * 2); if ($alog[$i] >= $gf) { $alog[$i] ^= $pp; } $log[$alog[$i]] = $i; } ksort($log); // generate the polynomial coefficients (c) $c = array_fill(0, ($nc + 1), 0); $c[0] = 1; for ($i = 1; $i <= $nc; ++$i) { $c[$i] = $c[($i-1)]; for ($j = ($i - 1); $j >= 1; --$j) { $c[$j] = $c[($j - 1)] ^ $this->getGFProduct($c[$j], $alog[$i], $log, $alog, $gf); } $c[0] = $this->getGFProduct($c[0], $alog[$i], $log, $alog, $gf); } ksort($c); // total number of data codewords $num_wd = ($nb * $nd); // total number of error codewords $num_we = ($nb * $nc); // for each block for ($b = 0; $b < $nb; ++$b) { // create interleaved data block $block = array(); for ($n = $b; $n < $num_wd; $n += $nb) { $block[] = $wd[$n]; } // initialize error codewords $we = array_fill(0, ($nc + 1), 0); // calculate error correction codewords for this block for ($i = 0; $i < $nd; ++$i) { $k = ($we[0] ^ $block[$i]); for ($j = 0; $j < $nc; ++$j) { $we[$j] = ($we[($j + 1)] ^ $this->getGFProduct($k, $c[($nc - $j - 1)], $log, $alog, $gf)); } } // add error codewords at the end of data codewords $j = 0; for ($i = $b; $i < $num_we; $i += $nb) { $wd[($num_wd + $i)] = $we[$j]; ++$j; } } // reorder codewords ksort($wd); return $wd; } /** * Return the 253-state codeword * @param int $cwpad Pad codeword. * @param int $cwpos Number of data codewords from the beginning of encoded data. * @return int pad codeword * @protected */ protected function get253StateCodeword($cwpad, $cwpos) { $pad = ($cwpad + (((149 * $cwpos) % 253) + 1)); if ($pad > 254) { $pad -= 254; } return $pad; } /** * Return the 255-state codeword * @param int $cwpad Pad codeword. * @param int $cwpos Number of data codewords from the beginning of encoded data. * @return int pad codeword * @protected */ protected function get255StateCodeword($cwpad, $cwpos) { $pad = ($cwpad + (((149 * $cwpos) % 255) + 1)); if ($pad > 255) { $pad -= 256; } return $pad; } /** * Returns true if the char belongs to the selected mode * @param int $chr Character (byte) to check. * @param int $mode Current encoding mode. * @return boolean true if the char is of the selected mode. * @protected */ protected function isCharMode($chr, $mode) { $status = false; switch ($mode) { case ENC_ASCII: { // ASCII character 0 to 127 $status = (($chr >= 0) AND ($chr <= 127)); break; } case ENC_C40: { // Upper-case alphanumeric $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 65) AND ($chr <= 90))); break; } case ENC_TXT: { // Lower-case alphanumeric $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 97) AND ($chr <= 122))); break; } case ENC_X12: { // ANSI X12 $status = (($chr == 13) OR ($chr == 42) OR ($chr == 62)); break; } case ENC_EDF: { // ASCII character 32 to 94 $status = (($chr >= 32) AND ($chr <= 94)); break; } case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page) $status = (($chr == 232) OR ($chr == 233) OR ($chr == 234) OR ($chr == 241)); break; } case ENC_ASCII_EXT: { // ASCII character 128 to 255 $status = (($chr >= 128) AND ($chr <= 255)); break; } case ENC_ASCII_NUM: { // ASCII digits $status = (($chr >= 48) AND ($chr <= 57)); break; } } return $status; } /** * The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S). * @param string $data data to encode * @param int $pos current position * @param int $mode current encoding mode * @return int encoding mode * @protected */ protected function lookAheadTest($data, $pos, $mode) { $data_length = strlen($data); if ($pos >= $data_length) { return $mode; } $charscount = 0; // count processed chars // STEP J if ($mode == ENC_ASCII) { $numch = array(0, 1, 1, 1, 1, 1.25); } else { $numch = array(1, 2, 2, 2, 2, 2.25); $numch[$mode] = 0; } while (true) { // STEP K if (($pos + $charscount) == $data_length) { if ($numch[ENC_ASCII] <= ceil(min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) { return ENC_ASCII; } if ($numch[ENC_BASE256] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) { return ENC_BASE256; } if ($numch[ENC_EDF] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256]))) { return ENC_EDF; } if ($numch[ENC_TXT] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) { return ENC_TXT; } if ($numch[ENC_X12] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256]))) { return ENC_X12; } return ENC_C40; } // get char $chr = ord($data[$pos + $charscount]); $charscount++; // STEP L if ($this->isCharMode($chr, ENC_ASCII_NUM)) { $numch[ENC_ASCII] += (1 / 2); } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]); $numch[ENC_ASCII] += 2; } else { $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]); $numch[ENC_ASCII] += 1; } // STEP M if ($this->isCharMode($chr, ENC_C40)) { $numch[ENC_C40] += (2 / 3); } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { $numch[ENC_C40] += (8 / 3); } else { $numch[ENC_C40] += (4 / 3); } // STEP N if ($this->isCharMode($chr, ENC_TXT)) { $numch[ENC_TXT] += (2 / 3); } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { $numch[ENC_TXT] += (8 / 3); } else { $numch[ENC_TXT] += (4 / 3); } // STEP O if ($this->isCharMode($chr, ENC_X12) OR $this->isCharMode($chr, ENC_C40)) { $numch[ENC_X12] += (2 / 3); } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { $numch[ENC_X12] += (13 / 3); } else { $numch[ENC_X12] += (10 / 3); } // STEP P if ($this->isCharMode($chr, ENC_EDF)) { $numch[ENC_EDF] += (3 / 4); } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) { $numch[ENC_EDF] += (17 / 4); } else { $numch[ENC_EDF] += (13 / 4); } // STEP Q if ($this->isCharMode($chr, ENC_BASE256)) { $numch[ENC_BASE256] += 4; } else { $numch[ENC_BASE256] += 1; } // STEP R if ($charscount >= 4) { if (($numch[ENC_ASCII] + 1) <= min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) { return ENC_ASCII; } if ((($numch[ENC_BASE256] + 1) <= $numch[ENC_ASCII]) OR (($numch[ENC_BASE256] + 1) < min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) { return ENC_BASE256; } if (($numch[ENC_EDF] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256])) { return ENC_EDF; } if (($numch[ENC_TXT] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) { return ENC_TXT; } if (($numch[ENC_X12] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) { return ENC_X12; } if (($numch[ENC_C40] + 1) < min($numch[ENC_ASCII], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) { if ($numch[ENC_C40] < $numch[ENC_X12]) { return ENC_C40; } if ($numch[ENC_C40] == $numch[ENC_X12]) { $k = ($pos + $charscount + 1); while ($k < $data_length) { $tmpchr = ord($data[$k]); if ($this->isCharMode($tmpchr, ENC_X12)) { return ENC_X12; } elseif (!($this->isCharMode($tmpchr, ENC_X12) OR $this->isCharMode($tmpchr, ENC_C40))) { break; } ++$k; } return ENC_C40; } } } } // end of while } /** * Get the switching codeword to a new encoding mode (latch codeword) * @param int $mode New encoding mode. * @return int Switch codeword. * @protected */ protected function getSwitchEncodingCodeword($mode) { switch ($mode) { case ENC_ASCII: { // ASCII character 0 to 127 $cw = 254; if ($this->last_enc == ENC_EDF) { $cw = 124; } break; } case ENC_C40: { // Upper-case alphanumeric $cw = 230; break; } case ENC_TXT: { // Lower-case alphanumeric $cw = 239; break; } case ENC_X12: { // ANSI X12 $cw = 238; break; } case ENC_EDF: { // ASCII character 32 to 94 $cw = 240; break; } case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page) $cw = 231; break; } } return $cw; } /** * Choose the minimum matrix size and return the max number of data codewords. * @param int $numcw Number of current codewords. * @return int number of data codewords in matrix * @protected */ protected function getMaxDataCodewords($numcw) { foreach ($this->symbattr as $key => $matrix) { if ($matrix[11] >= $numcw) { return $matrix[11]; } } return 0; } /** * Get high level encoding using the minimum symbol data characters for ECC 200 * @param string $data data to encode * @return array of codewords * @protected */ protected function getHighLevelEncoding($data) { // STEP A. Start in ASCII encodation. $enc = ENC_ASCII; // current encoding mode $pos = 0; // current position $cw = array(); // array of codewords to be returned $cw_num = 0; // number of data codewords $data_length = strlen($data); // number of chars while ($pos < $data_length) { // set last used encoding $this->last_enc = $enc; switch ($enc) { case ENC_ASCII: { // STEP B. While in ASCII encodation 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))) { // 1. If the next data sequence is at least 2 consecutive digits, encode the next two digits as a double digit in ASCII mode. $cw[] = (intval(substr($data, $pos, 2)) + 130); ++$cw_num; $pos += 2; } else { // 2. If the look-ahead test (starting at step J) indicates another mode, switch to that mode. $newenc = $this->lookAheadTest($data, $pos, $enc); if ($newenc != $enc) { // switch to new encoding $enc = $newenc; $cw[] = $this->getSwitchEncodingCodeword($enc); ++$cw_num; } else { // get new byte $chr = ord($data[$pos]); ++$pos; if ($this->isCharMode($chr, ENC_ASCII_EXT)) { // 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. $cw[] = 235; $cw[] = ($chr - 127); $cw_num += 2; } else { // 4. Otherwise process the next data character in ASCII encodation. $cw[] = ($chr + 1); ++$cw_num; } } } break; } case ENC_C40 : // Upper-case alphanumeric case ENC_TXT : // Lower-case alphanumeric case ENC_X12 : { // ANSI X12 $temp_cw = array(); $p = 0; $epos = $pos; // get charset ID $set_id = $this->chset_id[$enc]; // get basic charset for current encoding $charset = $this->chset[$set_id]; do { // 2. process the next character in C40 encodation. $chr = ord($data[$epos]); ++$epos; // check for extended character if ($chr & 0x80) { if ($enc == ENC_X12) { return false; } $chr = ($chr & 0x7f); $temp_cw[] = 1; // shift 2 $temp_cw[] = 30; // upper shift $p += 2; } if (isset($charset[$chr])) { $temp_cw[] = $charset[$chr]; ++$p; } else { if (isset($this->chset['SH1'][$chr])) { $temp_cw[] = 0; // shift 1 $shiftset = $this->chset['SH1']; } elseif (isset($this->chset['SH2'][$chr])) { $temp_cw[] = 1; // shift 2 $shiftset = $this->chset['SH2']; } elseif (($enc == ENC_C40) AND isset($this->chset['S3C'][$chr])) { $temp_cw[] = 2; // shift 3 $shiftset = $this->chset['S3C']; } elseif (($enc == ENC_TXT) AND isset($this->chset['S3T'][$chr])) { $temp_cw[] = 2; // shift 3 $shiftset = $this->chset['S3T']; } else { return false; } $temp_cw[] = $shiftset[$chr]; $p += 2; } if ($p >= 3) { $c1 = array_shift($temp_cw); $c2 = array_shift($temp_cw); $c3 = array_shift($temp_cw); $p -= 3; $tmp = ((1600 * $c1) + (40 * $c2) + $c3 + 1); $cw[] = ($tmp >> 8); $cw[] = ($tmp % 256); $cw_num += 2; $pos = $epos; // 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. $newenc = $this->lookAheadTest($data, $pos, $enc); if ($newenc != $enc) { // switch to new encoding $enc = $newenc; if ($enc != ENC_ASCII) { // set unlatch character $cw[] = $this->getSwitchEncodingCodeword(ENC_ASCII); ++$cw_num; } $cw[] = $this->getSwitchEncodingCodeword($enc); ++$cw_num; $pos -= $p; $p = 0; break; } } } while (($p > 0) AND ($epos < $data_length)); // process last data (if any) if ($p > 0) { // get remaining number of data symbols $cwr = ($this->getMaxDataCodewords($cw_num) - $cw_num); if (($cwr == 1) AND ($p == 1)) { // d. If one symbol character remains and one C40 value (data character) remains to be encoded $c1 = array_shift($temp_cw); --$p; $cw[] = ($chr + 1); ++$cw_num; $pos = $epos; $enc = ENC_ASCII; $this->last_enc = $enc; } elseif (($cwr == 2) AND ($p == 1)) { // c. If two symbol characters remain and only one C40 value (data character) remains to be encoded $c1 = array_shift($temp_cw); --$p; $cw[] = 254; $cw[] = ($chr + 1); $cw_num += 2; $pos = $epos; $enc = ENC_ASCII; $this->last_enc = $enc; } elseif (($cwr == 2) AND ($p == 2)) { // b. If two symbol characters remain and two C40 values remain to be encoded $c1 = array_shift($temp_cw); $c2 = array_shift($temp_cw); $p -= 2; $tmp = ((1600 * $c1) + (40 * $c2) + 1); $cw[] = ($tmp >> 8); $cw[] = ($tmp % 256); $cw_num += 2; $pos = $epos; $enc = ENC_ASCII; $this->last_enc = $enc; } else { // switch to ASCII encoding if ($enc != ENC_ASCII) { $enc = ENC_ASCII; $this->last_enc = $enc; $cw[] = $this->getSwitchEncodingCodeword($enc); ++$cw_num; $pos = ($epos - $p); } } } break; } case ENC_EDF: { // F. While in EDIFACT (EDF) encodation // initialize temporary array with 0 length $temp_cw = array(); $epos = $pos; $field_length = 0; $newenc = $enc; do { // 2. process the next character in EDIFACT encodation. $chr = ord($data[$epos]); if ($this->isCharMode($chr, ENC_EDF)) { ++$epos; $temp_cw[] = $chr; ++$field_length; } if (($field_length == 4) OR ($epos == $data_length) OR !$this->isCharMode($chr, ENC_EDF)) { if (($epos == $data_length) AND ($field_length < 3)) { $enc = ENC_ASCII; $cw[] = $this->getSwitchEncodingCodeword($enc); ++$cw_num; break; } if ($field_length < 4) { // set unlatch character $temp_cw[] = 0x1f; ++$field_length; // fill empty characters for ($i = $field_length; $i < 4; ++$i) { $temp_cw[] = 0; } $enc = ENC_ASCII; $this->last_enc = $enc; } // encodes four data characters in three codewords $tcw = (($temp_cw[0] & 0x3F) << 2) + (($temp_cw[1] & 0x30) >> 4); if ($tcw > 0) { $cw[] = $tcw; $cw_num++; } $tcw= (($temp_cw[1] & 0x0F) << 4) + (($temp_cw[2] & 0x3C) >> 2); if ($tcw > 0) { $cw[] = $tcw; $cw_num++; } $tcw = (($temp_cw[2] & 0x03) << 6) + ($temp_cw[3] & 0x3F); if ($tcw > 0) { $cw[] = $tcw; $cw_num++; } $temp_cw = array(); $pos = $epos; $field_length = 0; if ($enc == ENC_ASCII) { break; // exit from EDIFACT mode } } } while ($epos < $data_length); break; } case ENC_BASE256: { // G. While in Base 256 (B256) encodation // initialize temporary array with 0 length $temp_cw = array(); $field_length = 0; while (($pos < $data_length) AND ($field_length <= 1555)) { $newenc = $this->lookAheadTest($data, $pos, $enc); if ($newenc != $enc) { // 1. If the look-ahead test (starting at step J) indicates another mode, switch to that mode. $enc = $newenc; break; // exit from B256 mode } else { // 2. Otherwise, process the next character in Base 256 encodation. $chr = ord($data[$pos]); ++$pos; $temp_cw[] = $chr; ++$field_length; } } // set field length if ($field_length <= 249) { $cw[] = $this->get255StateCodeword($field_length, ($cw_num + 1)); ++$cw_num; } else { $cw[] = $this->get255StateCodeword((floor($field_length / 250) + 249), ($cw_num + 1)); $cw[] = $this->get255StateCodeword(($field_length % 250), ($cw_num + 2)); $cw_num += 2; } if (!empty($temp_cw)) { // add B256 field foreach ($temp_cw as $p => $cht) { $cw[] = $this->get255StateCodeword($cht, ($cw_num + $p + 1)); } } break; } } // end of switch enc } // end of while return $cw; } /** * Places "chr+bit" with appropriate wrapping within array[]. * (Annex F - ECC 200 symbol character placement) * @param array $marr Array of symbols. * @param int $nrow Number of rows. * @param int $ncol Number of columns. * @param int $row Row number. * @param int $col Column number. * @param int $chr Char byte. * @param int $bit Bit. * @return array * @protected */ protected function placeModule($marr, $nrow, $ncol, $row, $col, $chr, $bit) { if ($row < 0) { $row += $nrow; $col += (4 - (($nrow + 4) % 8)); } if ($col < 0) { $col += $ncol; $row += (4 - (($ncol + 4) % 8)); } $marr[(($row * $ncol) + $col)] = ((10 * $chr) + $bit); return $marr; } /** * Places the 8 bits of a utah-shaped symbol character. * (Annex F - ECC 200 symbol character placement) * @param array $marr Array of symbols. * @param int $nrow Number of rows. * @param int $ncol Number of columns. * @param int $row Row number. * @param int $col Column number. * @param int $chr Char byte. * @return array * @protected */ protected function placeUtah($marr, $nrow, $ncol, $row, $col, $chr) { $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-2, $chr, 1); $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-1, $chr, 2); $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-2, $chr, 3); $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-1, $chr, 4); $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col, $chr, 5); $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-2, $chr, 6); $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-1, $chr, 7); $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col, $chr, 8); return $marr; } /** * Places the 8 bits of the first special corner case. * (Annex F - ECC 200 symbol character placement) * @param array $marr Array of symbols. * @param int $nrow Number of rows. * @param int $ncol Number of columns. * @param int $chr Char byte. * @return array * @protected */ protected function placeCornerA($marr, $nrow, $ncol, $chr) { $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1); $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 1, $chr, 2); $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 2, $chr, 3); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5); $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6); $marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7); $marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8); return $marr; } /** * Places the 8 bits of the second special corner case. * (Annex F - ECC 200 symbol character placement) * @param array $marr Array of symbols. * @param int $nrow Number of rows. * @param int $ncol Number of columns. * @param int $chr Char byte. * @return array * @protected */ protected function placeCornerB($marr, $nrow, $ncol, $chr) { $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1); $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2); $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-4, $chr, 4); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 5); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 6); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 7); $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8); return $marr; } /** * Places the 8 bits of the third special corner case. * (Annex F - ECC 200 symbol character placement) * @param array $marr Array of symbols. * @param int $nrow Number of rows. * @param int $ncol Number of columns. * @param int $chr Char byte. * @return array * @protected */ protected function placeCornerC($marr, $nrow, $ncol, $chr) { $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1); $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2); $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5); $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6); $marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7); $marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8); return $marr; } /** * Places the 8 bits of the fourth special corner case. * (Annex F - ECC 200 symbol character placement) * @param array $marr Array of symbols. * @param int $nrow Number of rows. * @param int $ncol Number of columns. * @param int $chr Char byte. * @return array * @protected */ protected function placeCornerD($marr, $nrow, $ncol, $chr) { $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1); $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, $ncol-1, $chr, 2); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 3); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4); $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5); $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-3, $chr, 6); $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-2, $chr, 7); $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8); return $marr; } /** * Build a placement map. * (Annex F - ECC 200 symbol character placement) * @param int $nrow Number of rows. * @param int $ncol Number of columns. * @return array * @protected */ protected function getPlacementMap($nrow, $ncol) { // initialize array with zeros $marr = array_fill(0, ($nrow * $ncol), 0); // set starting values $chr = 1; $row = 4; $col = 0; do { // repeatedly first check for one of the special corner cases, then if (($row == $nrow) AND ($col == 0)) { $marr = $this->placeCornerA($marr, $nrow, $ncol, $chr); ++$chr; } if (($row == ($nrow - 2)) AND ($col == 0) AND ($ncol % 4)) { $marr = $this->placeCornerB($marr, $nrow, $ncol, $chr); ++$chr; } if (($row == ($nrow - 2)) AND ($col == 0) AND (($ncol % 8) == 4)) { $marr = $this->placeCornerC($marr, $nrow, $ncol, $chr); ++$chr; } if (($row == ($nrow + 4)) AND ($col == 2) AND (!($ncol % 8))) { $marr = $this->placeCornerD($marr, $nrow, $ncol, $chr); ++$chr; } // sweep upward diagonally, inserting successive characters, do { if (($row < $nrow) AND ($col >= 0) AND (!$marr[(($row * $ncol) + $col)])) { $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr); ++$chr; } $row -= 2; $col += 2; } while (($row >= 0) AND ($col < $ncol)); ++$row; $col += 3; // & then sweep downward diagonally, inserting successive characters,... do { if (($row >= 0) AND ($col < $ncol) AND (!$marr[(($row * $ncol) + $col)])) { $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr); ++$chr; } $row += 2; $col -= 2; } while (($row < $nrow) AND ($col >= 0)); $row += 3; ++$col; // ... until the entire array is scanned } while (($row < $nrow) OR ($col < $ncol)); // lastly, if the lower righthand corner is untouched, fill in fixed pattern if (!$marr[(($nrow * $ncol) - 1)]) { $marr[(($nrow * $ncol) - 1)] = 1; $marr[(($nrow * $ncol) - $ncol - 2)] = 1; } return $marr; } } // end DataMatrix class //============================================================+ // END OF FILE //============================================================+