diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Barcode/Object/Code25.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Barcode/Object/Code25.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,143 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Barcode
+ * @subpackage Object
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Code25.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @see Zend_Barcode_Object_ObjectAbstract
+ */
+require_once 'Zend/Barcode/Object/ObjectAbstract.php';
+
+/**
+ * @see Zend_Validate_Barcode
+ */
+require_once 'Zend/Validate/Barcode.php';
+
+/**
+ * Class for generate Interleaved 2 of 5 barcode
+ *
+ * @category   Zend
+ * @package    Zend_Barcode
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Barcode_Object_Code25 extends Zend_Barcode_Object_ObjectAbstract
+{
+    /**
+     * Coding map
+     * - 0 = narrow bar
+     * - 1 = wide bar
+     * @var array
+     */
+    protected $_codingMap = array(
+        '0' => '00110',
+        '1' => '10001',
+        '2' => '01001',
+        '3' => '11000',
+        '4' => '00101',
+        '5' => '10100',
+        '6' => '01100',
+        '7' => '00011',
+        '8' => '10010',
+        '9' => '01010',
+    );
+
+    /**
+     * Width of the barcode (in pixels)
+     * @return integer
+     */
+    protected function _calculateBarcodeWidth()
+    {
+        $quietZone       = $this->getQuietZone();
+        $startCharacter  = (2 * $this->_barThickWidth + 4 * $this->_barThinWidth) * $this->_factor;
+        $characterLength = (3 * $this->_barThinWidth + 2 * $this->_barThickWidth + 5 * $this->_barThinWidth)
+                         * $this->_factor;
+        $encodedData     = strlen($this->getText()) * $characterLength;
+        $stopCharacter   = (2 * $this->_barThickWidth + 4 * $this->_barThinWidth) * $this->_factor;
+        return $quietZone + $startCharacter + $encodedData + $stopCharacter + $quietZone;
+    }
+
+    /**
+     * Partial check of interleaved 2 of 5 barcode
+     * @return void
+     */
+    protected function _checkParams()
+    {
+        $this->_checkRatio();
+    }
+
+    /**
+     * Prepare array to draw barcode
+     * @return array
+     */
+    protected function _prepareBarcode()
+    {
+        $barcodeTable = array();
+
+        // Start character (30301)
+        $barcodeTable[] = array(1 , $this->_barThickWidth , 0 , 1);
+        $barcodeTable[] = array(0 , $this->_barThinWidth , 0 , 1);
+        $barcodeTable[] = array(1 , $this->_barThickWidth , 0 , 1);
+        $barcodeTable[] = array(0 , $this->_barThinWidth , 0 , 1);
+        $barcodeTable[] = array(1 , $this->_barThinWidth , 0 , 1);
+        $barcodeTable[] = array(0 , 1);
+
+        $text = str_split($this->getText());
+        foreach ($text as $char) {
+            $barcodeChar = str_split($this->_codingMap[$char]);
+            foreach ($barcodeChar as $c) {
+                /* visible, width, top, length */
+                $width = $c ? $this->_barThickWidth : $this->_barThinWidth;
+                $barcodeTable[] = array(1 , $width , 0 , 1);
+                $barcodeTable[] = array(0 , 1);
+            }
+        }
+
+        // Stop character (30103)
+        $barcodeTable[] = array(1 , $this->_barThickWidth , 0 , 1);
+        $barcodeTable[] = array(0 , $this->_barThinWidth , 0 , 1);
+        $barcodeTable[] = array(1 , $this->_barThinWidth , 0 , 1);
+        $barcodeTable[] = array(0 , $this->_barThinWidth , 0 , 1);
+        $barcodeTable[] = array(1 , $this->_barThickWidth , 0 , 1);
+        return $barcodeTable;
+    }
+
+    /**
+     * Get barcode checksum
+     *
+     * @param  string $text
+     * @return int
+     */
+    public function getChecksum($text)
+    {
+        $this->_checkText($text);
+        $factor   = 3;
+        $checksum = 0;
+
+        for ($i = strlen($text); $i > 0; $i --) {
+            $checksum += intval($text{$i - 1}) * $factor;
+            $factor    = 4 - $factor;
+        }
+
+        $checksum = (10 - ($checksum % 10)) % 10;
+
+        return $checksum;
+    }
+}