diff --git a/datamatrix.php b/datamatrix.php
new file mode 100755
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--- /dev/null
+++ b/datamatrix.php
@@ -0,0 +1,1151 @@
+.
+//
+// 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.
+ * (requires PHP bcmath extension)
+ * @package com.tecnick.tcpdf
+ * @abstract Class to create datamatrix barcode arrays for TCPDF class.
+ * @author Nicola Asuni
+ * @version 1.0.000
+ */
+
+// 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 to create DataMatrix ECC 200 barcode arrays for TCPDF class.
+ * DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code.
+ * (requires PHP bcmath extension)
+ * @name datamatrix
+ * @package com.tecnick.tcpdf
+ * @abstract Class to create DataMatrix barcode arrays for TCPDF class.
+ * @author Nicola Asuni
+ * @copyright 2010-2011 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com
+ * @link http://www.tcpdf.org
+ * @license http://www.gnu.org/copyleft/lesser.html LGPL
+ * @version 1.0.000
+ */
+class Datamatrix {
+
+ /**
+ * @var barcode array to be returned which is readable by TCPDF
+ * (access protected)
+ */
+ protected $barcode_array = array();
+
+ /**
+ * @var store last used encoding for data codewords
+ * (access protected)
+ */
+ protected $last_enc = ENC_ASCII;
+
+ /**
+ * @var Table of Data Matrix ECC 200 Symbol Attributes:
+ * - total matrix rows (including finder pattern)
+ * - total matrix cols (including finder pattern)
+ * - total matrix rows (without finder pattern)
+ * - total matrix cols (without finder pattern)
+ * - region data rows (with finder pattern)
+ * - region data col (with finder pattern)
+ * - region data rows (without finder pattern)
+ * - region data col (without finder pattern)
+ * - horizontal regions
+ * - vertical regions
+ * - regions
+ * - data codewords
+ * - error codewords
+ * - blocks
+ * - data codewords per block
+ * - error codewords per block
+ *
+ * (access 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
+ );
+
+ /**
+ * @var Map encodation modes whit character sets.
+ * (access protected)
+ */
+ protected $chset_id = array(ENC_C40 => 'C40', ENC_TXT => 'TXT', ENC_X12 =>'X12');
+
+ /**
+ * @var Basic set of charactes for each encodation mode
+ * (access 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 $code (string) code to represent using datamatrix
+ * (access public)
+ */
+ public function __construct($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] > $nd) {
+ // add padding
+ if ($this->last_enc == ENC_EDF) {
+ // switch to ASCII encoding
+ $cw[] = 124;
+ ++$nd;
+ } elseif ($this->last_enc != ENC_ASCII) {
+ // 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 = $this->getPlacemetMap($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;
+ * (access public)
+ */
+ public function getBarcodeArray() {
+ return $this->barcode_array;
+ }
+
+ /**
+ * Product of two numbers in a Power-of-Two Galois Field
+ * @param $a (int) first number to multiply.
+ * @param $b (int) second number to multiply.
+ * @param $log (array) Log table.
+ * @param $alog (array) Anti-Log table.
+ * @param $gf (array) Number of Factors of the Reed-Solomon polynomial.
+ * @return int product
+ * (access protected)
+ */
+ protected function getGFProduct($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 $wd (array) Array of datacodewords.
+ * @param $nb (int) Number of blocks.
+ * @param $nd (int) Number of data codewords per block.
+ * @param $nc (int) Number of correction codewords per block.
+ * @param $gf (int) numner of fields on log/antilog table (power of 2).
+ * @param $pp (int) The value of its prime modulus polynomial (301 for ECC200).
+ * @return array data codewords + error codewords
+ * (access protected)
+ */
+ protected function getErrorCorrection($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 $cwpad (int) Pad codeword.
+ * @param $cwpos (int) Number of data codewords from the beginning of encoded data.
+ * @return pad codeword
+ * (access protected)
+ */
+ protected function get253StateCodeword($cwpad, $cwpos) {
+ $pad = ($cwpad + (((149 * $cwpos) % 253) + 1));
+ if ($pad > 254) {
+ $pad -= 254;
+ }
+ return $pad;
+ }
+
+ /**
+ * Return the 255-state codeword
+ * @param $cwpad (int) Pad codeword.
+ * @param $cwpos (int) Number of data codewords from the beginning of encoded data.
+ * @return pad codeword
+ * (access protected)
+ */
+ protected function get255StateCodeword($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 $chr (string) character to check
+ * @return boolean true if the char is of the selected mode
+ * (access protected)
+ */
+ protected function isCharMode($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 $data (string) data to encode
+ * @param $pos (int) current position
+ * @param $mode (int) current encoding mode
+ * @return int encoding mode
+ * (access protected)
+ */
+ protected function lookAheadTest($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;
+ }
+ ++$k;
+ }
+ return ENC_C40;
+ }
+ }
+ }
+ } // end of while
+ }
+
+ /**
+ * Get the switching codeword to a new encoding mode (latch codeword)
+ * @param (int) New encoding mode.
+ * @return (int) Switch codeword.
+ * (access protected)
+ */
+ protected function getSwitchEncodingCodeword($mode) {
+ switch ($mode) {
+ case ENC_ASCII: { // ASCII character 0 to 127
+ $cw = 254;
+ 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 $cw;
+ }
+
+ /**
+ * Choose the minimum matrix size and return the max number of data codewords.
+ * @param (int) Number of current codewords.
+ * @return number of data codewords in matrix
+ * (access protected)
+ */
+ protected function getMaxDataCodewords($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 $data (string) data to encode
+ * @return array of codewords
+ * (access protected)
+ */
+ protected function getHighLevelEncoding($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
+ $data_lenght = strlen($data); // number of chars
+ while ($pos < $data_lenght) {
+ switch ($enc) {
+ case ENC_ASCII: { // STEP B. While in ASCII encodation
+ if (($pos < ($data_lenght - 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 = $this->chset['SH1'];
+ } elseif (isset($chr, $this->chset['SH2'][$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) {
+ $enc = $newenc;
+ $cw[] = $this->getSwitchEncodingCodeword($enc);
+ ++$cw_num;
+ break;
+ }
+ }
+ } while (($p > 0) AND ($epos < $data_lenght));
+ // process last data (if any)
+ if ($p > 0) {
+ // get remaining number of data symbols
+ $cwr = ($this->getMaxDataCodewords($cw_num + 2) - $cw_num);
+ if (($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;
+ $cw[] = ($c1 + 1);
+ ++$cw_num;
+ } elseif (($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;
+ $cw[] = ($c1 + 1);
+ $cw_num += 2;
+ } elseif (($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;
+ } else {
+ // switch to ASCII encoding
+ $enc = ENC_ASCII;
+ $cw[] = $this->getSwitchEncodingCodeword($enc);
+ ++$cw_num;
+ }
+ }
+ break;
+ }
+ case ENC_EDF: { // F. While in EDIFACT (EDF) encodation
+ // initialize temporary array with 0 lenght
+ $temp_cw = array();
+ $epos = $pos;
+ $field_lenght = 0;
+ while ($epos < $data_lenght) {
+ // 2. process the next character in EDIFACT encodation.
+ $chr = ord($data{($epos)});
+ ++$epos;
+ $temp_cw[] = $chr;
+ ++$field_lenght;
+ if (($field_lenght == 4) OR ($epos == $data_lenght)) {
+ if ($field_lenght < 4) {
+ // set unlatch character
+ $temp_cw[] = 0x1f;
+ ++$field_lenght;
+ // fill empty characters
+ for ($i = $field_lenght; $i < 4; ++$i) {
+ $temp_cw[] = 0;
+ }
+ }
+ // encodes four data characters in three codewords
+ $cw[] = (($temp_cw[0] & 0x3F) << 2) + (($temp_cw[1] & 0x30) >> 4);
+ $cw[] = (($temp_cw[1] & 0x0F) << 4) + (($temp_cw[2] & 0x3C) >> 2);
+ $cw[] = (($temp_cw[2] & 0x03) << 6) + ($temp_cw[3] & 0x3F);
+ $cw_num += 3;
+ $temp_cw = array();
+ $pos = $epos;
+ $field_lenght = 0;
+ }
+ // 1. If the EDIFACT encoding is at the point of starting a new triple symbol character and if the look-ahead test (starting at step J) indicates another mode, switch to that mode.
+ if ($field_lenght == 0) {
+ $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;
+ $cw[] = $this->getSwitchEncodingCodeword($enc);
+ ++$cw_num;
+ break; // exit from EDIFACT mode
+ }
+ }
+ }
+ break;
+ }
+ case ENC_BASE256: { // G. While in Base 256 (B256) encodation
+ // initialize temporary array with 0 lenght
+ $temp_cw = array();
+ $field_lenght = 0;
+ while (($pos < $data_lenght) AND ($field_lenght <= 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;
+ $cw[] = $this->getSwitchEncodingCodeword($enc);
+ ++$cw_num;
+ 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_lenght;
+ }
+ }
+ // set field lenght
+ if ($field_lenght <= 249) {
+ $cw[] = $field_lenght;
+ ++$cw_num;
+ } else {
+ $cw[] = (floor($field_lenght / 250) + 249);
+ $cw[] = ($field_lenght % 250);
+ $cw_num += 2;
+ }
+ if (!empty($temp_cw)) {
+ // add B256 field
+ foreach ($temp_cw as $p => $cht) {
+ $cw[] = $this->get255StateCodeword($chr, ($cw_num + $p));
+ }
+ }
+ break;
+ }
+ } // end of switch enc
+ } // end of while
+ // set last used encoding
+ $this->last_enc = $enc;
+ return $cw;
+ }
+
+ /**
+ * Places "chr+bit" with appropriate wrapping within array[].
+ * (Annex F - ECC 200 symbol character placement)
+ * @param $marr array Array of symbols.
+ * @param $nrow (int) Number of rows.
+ * @param $ncol (int) Number of columns.
+ * @param $row (int) Row number.
+ * @param $col (int) Column number.
+ * @param $chr (int) Char byte.
+ * @param $bit (int) Bit.
+ * @return array
+ * (access protected)
+ */
+ protected function placeModule($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 $marr array Array of symbols.
+ * @param $nrow (int) Number of rows.
+ * @param $ncol (int) Number of columns.
+ * @param $row (int) Row number.
+ * @param $col (int) Column number.
+ * @param $chr (int) Char byte.
+ * @return array
+ * (access protected)
+ */
+ protected function placeUtah($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 $marr array Array of symbols.
+ * @param $nrow (int) Number of rows.
+ * @param $ncol (int) Number of columns.
+ * @param $row (int) Row number.
+ * @param $col (int) Column number.
+ * @param $chr (int) Char byte.
+ * @return array
+ * (access protected)
+ */
+ protected function placeCornerA($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 $marr array Array of symbols.
+ * @param $nrow (int) Number of rows.
+ * @param $ncol (int) Number of columns.
+ * @param $row (int) Row number.
+ * @param $col (int) Column number.
+ * @param $chr (int) Char byte.
+ * @return array
+ * (access protected)
+ */
+ protected function placeCornerB($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 $marr array Array of symbols.
+ * @param $nrow (int) Number of rows.
+ * @param $ncol (int) Number of columns.
+ * @param $row (int) Row number.
+ * @param $col (int) Column number.
+ * @param $chr (int) Char byte.
+ * @return array
+ * (access protected)
+ */
+ protected function placeCornerC($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 $marr array Array of symbols.
+ * @param $nrow (int) Number of rows.
+ * @param $ncol (int) Number of columns.
+ * @param $row (int) Row number.
+ * @param $col (int) Column number.
+ * @param $chr (int) Char byte.
+ * @return array
+ * (access protected)
+ */
+ protected function placeCornerD($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 $nrow (int) Number of rows.
+ * @param $ncol (int) Number of columns.
+ * @return array
+ * (access protected)
+ */
+ protected function getPlacemetMap($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
+//============================================================+
diff --git a/tcpdf_filters.php b/tcpdf_filters.php
new file mode 100644
index 0000000..8076b5f
--- /dev/null
+++ b/tcpdf_filters.php
@@ -0,0 +1,479 @@
+.
+//
+// See LICENSE.TXT file for more information.
+// -------------------------------------------------------------------
+//
+// Description : This is a PHP class for decoding common PDF filters (PDF 32000-2008 - 7.4 Filters).
+//
+//============================================================+
+
+/**
+ * @file
+ * This is a PHP class for decoding common PDF filters (PDF 32000-2008 - 7.4 Filters).
+ * @package com.tecnick.tcpdf
+ * @author Nicola Asuni
+ * @version 1.0.000
+ */
+
+/**
+ * @class TCPDF_FILTERS
+ * This is a PHP class for decoding common PDF filters (PDF 32000-2008 - 7.4 Filters).
+ * @package com.tecnick.tcpdf
+ * @brief This is a PHP class for decoding common PDF filters.
+ * @version 1.0.000
+ * @author Nicola Asuni - info@tecnick.com
+ */
+class TCPDF_FILTERS {
+
+ /**
+ * Define a list of available filter decoders.
+ * @private
+ */
+ private $available_filters = array('ASCIIHexDecode', 'ASCII85Decode', 'LZWDecode', 'FlateDecode', 'RunLengthDecode');
+
+// -----------------------------------------------------------------------------
+
+ /**
+ * Get a list of available decoding filters.
+ * @return (array) Array of available filter decoders.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function getAvailableFilters() {
+ return $this->available_filters;
+ }
+
+ /**
+ * Decode data using the specified filter type.
+ * @param $filter (string) Filter name.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilter($filter, $data) {
+ switch ($filter) {
+ case 'ASCIIHexDecode': {
+ return $this->decodeFilterASCIIHexDecode($data);
+ break;
+ }
+ case 'ASCII85Decode': {
+ return $this->decodeFilterASCII85Decode($data);
+ break;
+ }
+ case 'LZWDecode': {
+ return $this->decodeFilterLZWDecode($data);
+ break;
+ }
+ case 'FlateDecode': {
+ return $this->decodeFilterFlateDecode($data);
+ break;
+ }
+ case 'RunLengthDecode': {
+ return $this->decodeFilterRunLengthDecode($data);
+ break;
+ }
+ case 'CCITTFaxDecode': {
+ return $this->decodeFilterCCITTFaxDecode($data);
+ break;
+ }
+ case 'JBIG2Decode': {
+ return $this->decodeFilterJBIG2Decode($data);
+ break;
+ }
+ case 'DCTDecode': {
+ return $this->decodeFilterDCTDecode($data);
+ break;
+ }
+ case 'JPXDecode': {
+ return $this->decodeFilterJPXDecode($data);
+ break;
+ }
+ case 'Crypt': {
+ return $this->decodeFilterCrypt($data);
+ break;
+ }
+ default: {
+ return decodeFilterStandard($data);
+ break;
+ }
+ }
+ }
+
+ // --- FILTERS (PDF 32000-2008 - 7.4 Filters) ------------------------------
+
+ /**
+ * Standard
+ * Default decoding filter (leaves data unchanged).
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterStandard($data) {
+ return $data;
+ }
+
+ /**
+ * ASCIIHexDecode
+ * Decodes data encoded in an ASCII hexadecimal representation, reproducing the original binary data.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterASCIIHexDecode($data) {
+ // intialize string to return
+ $decoded = '';
+ // all white-space characters shall be ignored
+ $data = preg_replace('/[\s]/', '', $data);
+ // check for EOD character: GREATER-THAN SIGN (3Eh)
+ $eod = strpos($data, '>');
+ if ($eod !== false) {
+ // remove EOD and extra data (if any)
+ $data = substr($data, 0, $eod);
+ $eod = true;
+ }
+ // get data length
+ $data_length = strlen($data);
+ if (($data_length % 2) != 0) {
+ // odd number of hexadecimal digits
+ if ($eod) {
+ // EOD shall behave as if a 0 (zero) followed the last digit
+ $data = substr($data, 0, -1).'0'.substr($data, -1);
+ } else {
+ $this->Error('decodeASCIIHex: invalid code');
+ }
+ }
+ // check for invalid characters
+ if (preg_match('/[^a-fA-F\d]/', $data) > 0) {
+ $this->Error('decodeASCIIHex: invalid code');
+ }
+ // get one byte of binary data for each pair of ASCII hexadecimal digits
+ $decoded = pack('H*', $data);
+ return $decoded;
+ }
+
+ /**
+ * ASCII85Decode
+ * Decodes data encoded in an ASCII base-85 representation, reproducing the original binary data.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterASCII85Decode($data) {
+ // intialize string to return
+ $decoded = '';
+ // all white-space characters shall be ignored
+ $data = preg_replace('/[\s]/', '', $data);
+ // remove start sequence 2-character sequence <~ (3Ch)(7Eh)
+ if (strpos($data, '<~') !== false) {
+ // remove EOD and extra data (if any)
+ $data = substr($data, 2);
+ }
+ // check for EOD: 2-character sequence ~> (7Eh)(3Eh)
+ $eod = strpos($data, '~>');
+ if ($eod !== false) {
+ // remove EOD and extra data (if any)
+ $data = substr($data, 0, $eod);
+ }
+ // data length
+ $data_length = strlen($data);
+ // check for invalid characters
+ if (preg_match('/[^\x21-\x75,\x74]/', $data) > 0) {
+ $this->Error('decodeASCII85: invalid code');
+ }
+ // z sequence
+ $zseq = chr(0).chr(0).chr(0).chr(0);
+ // position inside a group of 4 bytes (0-3)
+ $group_pos = 0;
+ $tuple = 0;
+ $pow85 = array((85*85*85*85), (85*85*85), (85*85), 85, 1);
+ $last_pos = ($data_length - 1);
+ // for each byte
+ for ($i = 0; $i < $data_length; ++$i) {
+ // get char value
+ $char = ord($data[$i]);
+ if ($char == 122) { // 'z'
+ if ($group_pos == 0) {
+ $decoded .= $zseq;
+ } else {
+ $this->Error('decodeASCII85: invalid code');
+ }
+ } else {
+ // the value represented by a group of 5 characters should never be greater than 2^32 - 1
+ $tuple += (($char - 33) * $pow85[$group_pos]);
+ if ($group_pos == 4) {
+ $decoded .= chr($tuple >> 24).chr($tuple >> 16).chr($tuple >> 8).chr($tuple);
+ $tuple = 0;
+ $group_pos = 0;
+ } else {
+ ++$group_pos;
+ }
+ }
+ }
+ if ($group_pos > 1) {
+ $tuple += $pow85[($group_pos - 1)];
+ }
+ // last tuple (if any)
+ switch ($group_pos) {
+ case 4: {
+ $decoded .= chr($tuple >> 24).chr($tuple >> 16).chr($tuple >> 8);
+ break;
+ }
+ case 3: {
+ $decoded .= chr($tuple >> 24).chr($tuple >> 16);
+ break;
+ }
+ case 2: {
+ $decoded .= chr($tuple >> 24);
+ break;
+ }
+ case 1: {
+ $this->Error('decodeASCII85: invalid code');
+ break;
+ }
+ }
+ return $decoded;
+ }
+
+ /**
+ * LZWDecode
+ * Decompresses data encoded using the LZW (Lempel-Ziv-Welch) adaptive compression method, reproducing the original text or binary data.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterLZWDecode($data) {
+ // intialize string to return
+ $decoded = '';
+ // data length
+ $data_length = strlen($data);
+ // convert string to binary string
+ $bitstring = '';
+ for ($i = 0; $i < $data_length; ++$i) {
+ $bitstring .= sprintf('%08b', ord($data{$i}));
+ }
+ // get the number of bits
+ $data_length = strlen($bitstring);
+ // initialize code length in bits
+ $bitlen = 9;
+ // initialize dictionary index
+ $dix = 258;
+ // initialize the dictionary (with the first 256 entries).
+ $dictionary = array();
+ for ($i = 0; $i < 256; ++$i) {
+ $dictionary[$i] = chr($i);
+ }
+ // previous val
+ $prev_index = 0;
+ // while we encounter EOD marker (257), read code_length bits
+ while (($data_length > 0) AND (($index = bindec(substr($bitstring, 0, $bitlen))) != 257)) {
+ // remove read bits from string
+ $bitstring = substr($bitstring, $bitlen);
+ // update number of bits
+ $data_length -= $bitlen;
+ if ($index == 256) { // clear-table marker
+ // reset code length in bits
+ $bitlen = 9;
+ // reset dictionary index
+ $dix = 258;
+ $prev_index = 256;
+ // reset the dictionary (with the first 256 entries).
+ $dictionary = array();
+ for ($i = 0; $i < 256; ++$i) {
+ $dictionary[$i] = chr($i);
+ }
+ } elseif ($prev_index == 256) {
+ // first entry
+ $decoded .= $dictionary[$index];
+ $prev_index = $index;
+ } else {
+ // check if index exist in the dictionary
+ if ($index < $dix) {
+ // index exist on dictionary
+ $decoded .= $dictionary[$index];
+ $dic_val = $dictionary[$prev_index].$dictionary[$index]{0};
+ // store current index
+ $prev_index = $index;
+ } else {
+ // index do not exist on dictionary
+ $dic_val = $dictionary[$prev_index].$dictionary[$prev_index]{0};
+ $decoded .= $dic_val;
+ }
+ // update dictionary
+ $dictionary[$dix] = $dic_val;
+ ++$dix;
+ // change bit length by case
+ if ($dix == 2047) {
+ $bitlen = 12;
+ } elseif ($dix == 1023) {
+ $bitlen = 11;
+ } elseif ($dix == 511) {
+ $bitlen = 10;
+ }
+ }
+ }
+ return $decoded;
+ }
+
+ /**
+ * FlateDecode
+ * Decompresses data encoded using the zlib/deflate compression method, reproducing the original text or binary data.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterFlateDecode($data) {
+ // intialize string to return
+ $decoded = gzuncompress($data);
+ if ($decoded === false) {
+ $this->Error('decodeFlate: invalid code');
+ }
+ return $decoded;
+ }
+
+ /**
+ * RunLengthDecode
+ * Decompresses data encoded using a byte-oriented run-length encoding algorithm.
+ * @param $data (string) Data to decode.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterRunLengthDecode($data) {
+ // intialize string to return
+ $decoded = '';
+ // data length
+ $data_length = strlen($data);
+ $i = 0;
+ while($i < $data_length) {
+ // get current byte value
+ $byte = ord($data{$i});
+ if ($byte == 128) {
+ // a length value of 128 denote EOD
+ break;
+ } elseif ($byte < 128) {
+ // if the length byte is in the range 0 to 127
+ // the following length + 1 (1 to 128) bytes shall be copied literally during decompression
+ $decoded .= substr($data, ($i + 1), ($byte + 1));
+ // move to next block
+ $i += ($byte + 2);
+ } else {
+ // if length is in the range 129 to 255,
+ // the following single byte shall be copied 257 - length (2 to 128) times during decompression
+ $decoded .= str_repeat($data{($i + 1)}, (257 - $byte));
+ // move to next block
+ $i += 2;
+ }
+ }
+ return $decoded;
+ }
+
+ /**
+ * CCITTFaxDecode (NOT IMPLEMETED)
+ * Decompresses data encoded using the CCITT facsimile standard, reproducing the original data (typically monochrome image data at 1 bit per pixel).
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterCCITTFaxDecode($data) {
+ return $data;
+ }
+
+ /**
+ * JBIG2Decode (NOT IMPLEMETED)
+ * Decompresses data encoded using the JBIG2 standard, reproducing the original monochrome (1 bit per pixel) image data (or an approximation of that data).
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterJBIG2Decode($data) {
+ return $data;
+ }
+
+ /**
+ * DCTDecode (NOT IMPLEMETED)
+ * Decompresses data encoded using a DCT (discrete cosine transform) technique based on the JPEG standard, reproducing image sample data that approximates the original data.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterDCTDecode($data) {
+ return $data;
+ }
+
+ /**
+ * JPXDecode (NOT IMPLEMETED)
+ * Decompresses data encoded using the wavelet-based JPEG2000 standard, reproducing the original image data.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterJPXDecode($data) {
+ return $data;
+ }
+
+ /**
+ * Crypt (NOT IMPLEMETED)
+ * Decrypts data encrypted by a security handler, reproducing the data as it was before encryption.
+ * @param $data (string) Data to decode.
+ * @return Decoded data string.
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function decodeFilterCrypt($data) {
+ return $data;
+ }
+
+ // --- END FILTERS SECTION -------------------------------------------------
+
+ /**
+ * This method is automatically called in case of fatal error; it simply outputs the message and halts the execution.
+ * @param $msg (string) The error message
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function Error($msg) {
+ // exit program and print error
+ die('TCPDF_FILTERS ERROR: '.$msg);
+ }
+
+} // END OF TCPDF_FILTERS CLASS
+
+//============================================================+
+// END OF FILE
+//============================================================+
diff --git a/tcpdf_parser.php b/tcpdf_parser.php
new file mode 100644
index 0000000..9fc28e3
--- /dev/null
+++ b/tcpdf_parser.php
@@ -0,0 +1,503 @@
+.
+//
+// See LICENSE.TXT file for more information.
+// -------------------------------------------------------------------
+//
+// Description : This is a PHP class for parsing PDF documents.
+//
+//============================================================+
+
+/**
+ * @file
+ * This is a PHP class for parsing PDF documents.
+ * @package com.tecnick.tcpdf
+ * @author Nicola Asuni
+ * @version 1.0.000
+ */
+
+// include class for decoding filters
+require_once(dirname(__FILE__).'/tcpdf_filters.php');
+
+/**
+ * @class TCPDF_PARSER
+ * This is a PHP class for parsing PDF documents.
+ * @package com.tecnick.tcpdf
+ * @brief This is a PHP class for parsing PDF documents..
+ * @version 1.0.000
+ * @author Nicola Asuni - info@tecnick.com
+ */
+class TCPDF_PARSER {
+
+ /**
+ * Raw content of the PDF document.
+ * @private
+ */
+ private $pdfdata = '';
+
+ /**
+ * XREF data.
+ * @protected
+ */
+ protected $xref = array();
+
+ /**
+ * Array of PDF objects.
+ * @protected
+ */
+ protected $objects = array();
+
+ /**
+ * Class object for decoding filters.
+ * @private
+ */
+ private $FilterDecoders;
+
+// -----------------------------------------------------------------------------
+
+ /**
+ * Parse a PDF document an return an array of objects.
+ * @param $data (string) PDF data to parse.
+ * @public
+ * @since 1.0.000 (2011-05-24)
+ */
+ public function __construct($data) {
+ if (empty($data)) {
+ $this->Error('Empty PDF data.');
+ }
+ $this->pdfdata = $data;
+ // get length
+ $pdflen = strlen($this->pdfdata);
+ // initialize class for decoding filters
+ $this->FilterDecoders = new TCPDF_FILTERS();
+ // get xref and trailer data
+ $this->xref = $this->getXrefData();
+ // parse all document objects
+ $this->objects = array();
+ foreach ($this->xref['xref'] as $obj => $offset) {
+ if (!isset($this->objects[$obj])) {
+ $this->objects[$obj] = $this->getIndirectObject($obj, $offset, true);
+ }
+ }
+ // release some memory
+ unset($this->pdfdata);
+ $this->pdfdata = '';
+ }
+
+ /**
+ * Return an array of parsed PDF document objects.
+ * @return (array) Array of parsed PDF document objects.
+ * @public
+ * @since 1.0.000 (2011-06-26)
+ */
+ public function getParsedData() {
+ return array($this->xref, $this->objects);
+ }
+
+ /**
+ * Get xref (cross-reference table) and trailer data from PDF document data.
+ * @param $offset (int) xref offset (if know).
+ * @param $xref (array) previous xref array (if any).
+ * @return Array containing xref and trailer data.
+ * @protected
+ * @since 1.0.000 (2011-05-24)
+ */
+ protected function getXrefData($offset=0, $xref=array()) {
+ // find last startxref
+ if (preg_match_all('/[\r\n]startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i', $this->pdfdata, $matches, PREG_SET_ORDER, $offset) == 0) {
+ $this->Error('Unable to find startxref');
+ }
+ $matches = array_pop($matches);
+ $startxref = $matches[1];
+ // check xref position
+ if (strpos($this->pdfdata, 'xref', $startxref) != $startxref) {
+ $this->Error('Unable to find xref');
+ }
+ // extract xref data (object indexes and offsets)
+ $offset = $startxref + 5;
+ // initialize object number
+ $obj_num = 0;
+ while (preg_match('/^([0-9]+)[\s]([0-9]+)[\s]?([nf]?)/im', $this->pdfdata, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) {
+ $offset = (strlen($matches[0][0]) + $matches[0][1]);
+ if ($matches[3][0] == 'n') {
+ // create unique object index: [object number]_[generation number]
+ $index = $obj_num.'_'.intval($matches[2][0]);
+ // check if object already exist
+ if (!isset($xref['xref'][$index])) {
+ // store object offset position
+ $xref['xref'][$index] = intval($matches[1][0]);
+ }
+ ++$obj_num;
+ $offset += 2;
+ } elseif ($matches[3][0] == 'f') {
+ ++$obj_num;
+ $offset += 2;
+ } else {
+ // object number (index)
+ $obj_num = intval($matches[1][0]);
+ }
+ }
+ // get trailer data
+ if (preg_match('/trailer[\s]*<<(.*)>>[\s]*[\r\n]+startxref[\s]*[\r\n]+/isU', $this->pdfdata, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) {
+ $trailer_data = $matches[1][0];
+ if (!isset($xref['trailer'])) {
+ // get only the last updated version
+ $xref['trailer'] = array();
+ // parse trailer_data
+ if (preg_match('/Size[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) {
+ $xref['trailer']['size'] = intval($matches[1]);
+ }
+ if (preg_match('/Root[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) {
+ $xref['trailer']['root'] = intval($matches[1]).'_'.intval($matches[2]);
+ }
+ if (preg_match('/Encrypt[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) {
+ $xref['trailer']['encrypt'] = intval($matches[1]).'_'.intval($matches[2]);
+ }
+ if (preg_match('/Info[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) {
+ $xref['trailer']['info'] = intval($matches[1]).'_'.intval($matches[2]);
+ }
+ if (preg_match('/ID[\s]*[\[][\s]*[<]([^>]*)[>][\s]*[<]([^>]*)[>]/i', $trailer_data, $matches) > 0) {
+ $xref['trailer']['id'] = array();
+ $xref['trailer']['id'][0] = $matches[1];
+ $xref['trailer']['id'][1] = $matches[2];
+ }
+ }
+ if (preg_match('/Prev[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) {
+ // get previous xref
+ $xref = getXrefData(substr($this->pdfdata, 0, $startxref), intval($matches[1]), $xref);
+ }
+ } else {
+ $this->Error('Unable to find trailer');
+ }
+ return $xref;
+ }
+
+ /**
+ * Get object type, raw value and offset to next object
+ * @param $offset (int) Object offset.
+ * @return array containing object type, raw value and offset to next object
+ * @protected
+ * @since 1.0.000 (2011-06-20)
+ */
+ protected function getRawObject($offset=0) {
+ $objtype = ''; // object type to be returned
+ $objval = ''; // object value to be returned
+ // skip initial white space chars: \x00 null (NUL), \x09 horizontal tab (HT), \x0A line feed (LF), \x0C form feed (FF), \x0D carriage return (CR), \x20 space (SP)
+ $offset += strspn($this->pdfdata, "\x00\x09\x0a\x0c\x0d\x20", $offset);
+ // get first char
+ $char = $this->pdfdata{$offset};
+ // get object type
+ switch ($char) {
+ case '%': { // \x25 PERCENT SIGN
+ // skip comment and search for next token
+ $next = strcspn($this->pdfdata, "\r\n", $offset);
+ if ($next > 0) {
+ $offset += $next;
+ return $this->getRawObject($this->pdfdata, $offset);
+ }
+ break;
+ }
+ case '/': { // \x2F SOLIDUS
+ // name object
+ $objtype = $char;
+ ++$offset;
+ if (preg_match('/^([^\x00\x09\x0a\x0c\x0d\x20\s\x28\x29\x3c\x3e\x5b\x5d\x7b\x7d\x2f\x25]+)/', substr($this->pdfdata, $offset, 256), $matches) == 1) {
+ $objval = $matches[1]; // unescaped value
+ $offset += strlen($objval);
+ }
+ break;
+ }
+ case '(': // \x28 LEFT PARENTHESIS
+ case ')': { // \x29 RIGHT PARENTHESIS
+ // literal string object
+ $objtype = $char;
+ ++$offset;
+ $strpos = $offset;
+ if ($char == '(') {
+ $open_bracket = 1;
+ while ($open_bracket > 0) {
+ if (!isset($this->pdfdata{$strpos})) {
+ break;
+ }
+ $ch = $this->pdfdata{$strpos};
+ switch ($ch) {
+ case '\\': { // REVERSE SOLIDUS (5Ch) (Backslash)
+ // skip next character
+ ++$strpos;
+ break;
+ }
+ case '(': { // LEFT PARENHESIS (28h)
+ ++$open_bracket;
+ break;
+ }
+ case ')': { // RIGHT PARENTHESIS (29h)
+ --$open_bracket;
+ break;
+ }
+ }
+ ++$strpos;
+ }
+ $objval = substr($this->pdfdata, $offset, ($strpos - $offset - 1));
+ $offset = $strpos;
+ }
+ break;
+ }
+ case '[': // \x5B LEFT SQUARE BRACKET
+ case ']': { // \x5D RIGHT SQUARE BRACKET
+ // array object
+ $objtype = $char;
+ ++$offset;
+ if ($char == '[') {
+ // get array content
+ $objval = array();
+ do {
+ // get element
+ $element = $this->getRawObject($offset);
+ $offset = $element[2];
+ $objval[] = $element;
+ } while ($element[0] != ']');
+ // remove closing delimiter
+ array_pop($objval);
+ }
+ break;
+ }
+ case '<': // \x3C LESS-THAN SIGN
+ case '>': { // \x3E GREATER-THAN SIGN
+ if (isset($this->pdfdata{($offset + 1)}) AND ($this->pdfdata{($offset + 1)} == $char)) {
+ // dictionary object
+ $objtype = $char.$char;
+ $offset += 2;
+ if ($char == '<') {
+ // get array content
+ $objval = array();
+ do {
+ // get element
+ $element = $this->getRawObject($offset);
+ $offset = $element[2];
+ $objval[] = $element;
+ } while ($element[0] != '>>');
+ // remove closing delimiter
+ array_pop($objval);
+ }
+ } else {
+ // hexadecimal string object
+ $objtype = $char;
+ ++$offset;
+ if (($char == '<') AND (preg_match('/^([0-9A-Fa-f]+)[>]/iU', substr($this->pdfdata, $offset), $matches) == 1)) {
+ $objval = $matches[1];
+ $offset += strlen($matches[0]);
+ }
+ }
+ break;
+ }
+ default: {
+ if (substr($this->pdfdata, $offset, 6) == 'endobj') {
+ // indirect object
+ $objtype = 'endobj';
+ $offset += 6;
+ } elseif (substr($this->pdfdata, $offset, 4) == 'null') {
+ // null object
+ $objtype = 'null';
+ $offset += 4;
+ $objval = 'null';
+ } elseif (substr($this->pdfdata, $offset, 4) == 'true') {
+ // boolean true object
+ $objtype = 'boolean';
+ $offset += 4;
+ $objval = 'true';
+ } elseif (substr($this->pdfdata, $offset, 5) == 'false') {
+ // boolean false object
+ $objtype = 'boolean';
+ $offset += 5;
+ $objval = 'false';
+ } elseif (substr($this->pdfdata, $offset, 6) == 'stream') {
+ // start stream object
+ $objtype = 'stream';
+ $offset += 6;
+ if (preg_match('/^[\r\n]+(.*)[\r\n]*endstream/isU', substr($this->pdfdata, $offset), $matches) == 1) {
+ $objval = $matches[1];
+ $offset += strlen($matches[0]);
+ }
+ } elseif (substr($this->pdfdata, $offset, 9) == 'endstream') {
+ // end stream object
+ $objtype = 'endstream';
+ $offset += 9;
+ } elseif (preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+R/iU', substr($this->pdfdata, $offset, 33), $matches) == 1) {
+ // indirect object reference
+ $objtype = 'ojbref';
+ $offset += strlen($matches[0]);
+ $objval = intval($matches[1]).'_'.intval($matches[2]);
+ } elseif (preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+obj/iU', substr($this->pdfdata, $offset, 33), $matches) == 1) {
+ // object start
+ $objtype = 'ojb';
+ $objval = intval($matches[1]).'_'.intval($matches[2]);
+ $offset += strlen ($matches[0]);
+ } elseif (($numlen = strspn($this->pdfdata, '+-.0123456789', $offset)) > 0) {
+ // numeric object
+ $objtype = 'numeric';
+ $objval = substr($this->pdfdata, $offset, $numlen);
+ $offset += $numlen;
+ }
+ break;
+ }
+ }
+ return array($objtype, $objval, $offset);
+ }
+
+ /**
+ * Get content of indirect object.
+ * @param $obj_ref (string) Object number and generation number separated by underscore character.
+ * @param $offset (int) Object offset.
+ * @param $decoding (boolean) If true decode streams.
+ * @return array containing object data.
+ * @protected
+ * @since 1.0.000 (2011-05-24)
+ */
+ protected function getIndirectObject($obj_ref, $offset=0, $decoding=true) {
+ $obj = explode('_', $obj_ref);
+ if (($obj === false) OR (count($obj) != 2)) {
+ $this->Error('Invalid object reference: '.$obj);
+ return;
+ }
+ $objref = $obj[0].' '.$obj[1].' obj';
+ if (strpos($this->pdfdata, $objref, $offset) != $offset) {
+ // an indirect reference to an undefined object shall be considered a reference to the null object
+ return array('null', 'null', $offset);
+ }
+ // starting position of object content
+ $offset += strlen($objref);
+ // get array of object content
+ $objdata = array();
+ $i = 0; // object main index
+ do {
+ // get element
+ $element = $this->getRawObject($offset);
+ $offset = $element[2];
+ // decode stream using stream's dictionary information
+ if ($decoding AND ($element[0] == 'stream') AND (isset($objdata[($i - 1)][0])) AND ($objdata[($i - 1)][0] == '<<')) {
+ $element[3] = $this->decodeStream($objdata[($i - 1)][1], $element[1]);
+ }
+ $objdata[$i] = $element;
+ ++$i;
+ } while ($element[0] != 'endobj');
+ // remove closing delimiter
+ array_pop($objdata);
+ // return raw object content
+ return $objdata;
+ }
+
+ /**
+ * Get the content of object, resolving indect object reference if necessary.
+ * @param $obj (string) Object value.
+ * @return array containing object data.
+ * @protected
+ * @since 1.0.000 (2011-06-26)
+ */
+ protected function getObjectVal($obj) {
+ if ($obj[0] == 'objref') {
+ // reference to indirect object
+ if (isset($this->objects[$obj[1]])) {
+ // this object has been already parsed
+ return $this->objects[$obj[1]];
+ } elseif (isset($this->xref[$obj[1]])) {
+ // parse new object
+ $this->objects[$obj[1]] = $this->getIndirectObject($obj[1], $this->xref[$obj[1]], false);
+ return $this->objects[$obj[1]];
+ }
+ }
+ return $obj;
+ }
+
+ /**
+ * Decode the specified stream.
+ * @param $sdic (array) Stream's dictionary array.
+ * @param $stream (string) Stream to decode.
+ * @return array containing decoded stream data and remaining filters.
+ * @protected
+ * @since 1.0.000 (2011-06-22)
+ */
+ protected function decodeStream($sdic, $stream) {
+ // get stream lenght and filters
+ $slength = strlen($stream);
+ $filters = array();
+ foreach ($sdic as $k => $v) {
+ if ($v[0] == '/') {
+ if (($v[1] == 'Length') AND (isset($sdic[($k + 1)])) AND ($sdic[($k + 1)][0] == 'numeric')) {
+ // get declared stream lenght
+ $declength = intval($sdic[($k + 1)][1]);
+ if ($declength < $slength) {
+ $stream = substr($stream, 0, $declength);
+ $slength = $declength;
+ }
+ } elseif (($v[1] == 'Filter') AND (isset($sdic[($k + 1)]))) {
+ // resolve indirect object
+ $objval = $this->getObjectVal($sdic[($k + 1)]);
+ if ($objval[0] == '/') {
+ // single filter
+ $filters[] = $objval[1];
+ } elseif ($objval[0] == '[') {
+ // array of filters
+ foreach ($objval[1] as $flt) {
+ if ($flt[0] == '/') {
+ $filters[] = $flt[1];
+ }
+ }
+ }
+ }
+ }
+ }
+ // decode the stream
+ $remaining_filters = array();
+ foreach ($filters as $filter) {
+ if (in_array($filter, $this->FilterDecoders->getAvailableFilters())) {
+ $stream = $this->FilterDecoders->decodeFilter($filter, $stream);
+ } else {
+ // add missing filter to array
+ $remaining_filters[] = $filter;
+ }
+ }
+ return array($stream, $remaining_filters);
+ }
+
+ /**
+ * This method is automatically called in case of fatal error; it simply outputs the message and halts the execution.
+ * @param $msg (string) The error message
+ * @public
+ * @since 1.0.000 (2011-05-23)
+ */
+ public function Error($msg) {
+ // exit program and print error
+ die('TCPDF_PARSER ERROR: '.$msg);
+ }
+
+} // END OF TCPDF_PARSER CLASS
+
+//============================================================+
+// END OF FILE
+//============================================================+