diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Validate/Barcode/Code93.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Validate/Barcode/Code93.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,120 @@
+<?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_Validate
+ * @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: Code93.php 20785 2010-01-31 09:43:03Z mikaelkael $
+ */
+
+/**
+ * @see Zend_Validate_Barcode_AdapterAbstract
+ */
+require_once 'Zend/Validate/Barcode/AdapterAbstract.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Validate
+ * @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_Validate_Barcode_Code93 extends Zend_Validate_Barcode_AdapterAbstract
+{
+    /**
+     * Allowed barcode lengths
+     * @var integer
+     */
+    protected $_length = -1;
+
+    /**
+     * Allowed barcode characters
+     * @var string
+     */
+    protected $_characters = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ -.$/+%';
+
+    /**
+     * Checksum function
+     * @var string
+     */
+    protected $_checksum = '_code93';
+
+    /**
+     * Note that the characters !"§& are only synonyms
+     * @var array
+     */
+    protected $_check = array(
+        '0' =>  0, '1' =>  1, '2' =>  2, '3' =>  3, '4' =>  4, '5' =>  5, '6' =>  6,
+        '7' =>  7, '8' =>  8, '9' =>  9, 'A' => 10, 'B' => 11, 'C' => 12, 'D' => 13,
+        'E' => 14, 'F' => 15, 'G' => 16, 'H' => 17, 'I' => 18, 'J' => 19, 'K' => 20,
+        'L' => 21, 'M' => 22, 'N' => 23, 'O' => 24, 'P' => 25, 'Q' => 26, 'R' => 27,
+        'S' => 28, 'T' => 29, 'U' => 30, 'V' => 31, 'W' => 32, 'X' => 33, 'Y' => 34,
+        'Z' => 35, '-' => 36, '.' => 37, ' ' => 38, '$' => 39, '/' => 40, '+' => 41,
+        '%' => 42, '!' => 43, '"' => 44, '§' => 45, '&' => 46,
+    );
+
+    /**
+     * Constructor
+     *
+     * Sets check flag to false.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        $this->setCheck(false);
+    }
+
+    /**
+     * Validates the checksum (Modulo CK)
+     *
+     * @param  string $value The barcode to validate
+     * @return boolean
+     */
+    protected function _code93($value)
+    {
+        $checksum = substr($value, -2, 2);
+        $value    = str_split(substr($value, 0, -2));
+        $count    = 0;
+        $length   = count($value) % 20;
+        foreach($value as $char) {
+            if ($length == 0) {
+                $length = 20;
+            }
+
+            $count += $this->_check[$char] * $length;
+            --$length;
+        }
+
+        $check   = array_search(($count % 47), $this->_check);
+        $value[] = $check;
+        $count   = 0;
+        $length  = count($value) % 15;
+        foreach($value as $char) {
+            if ($length == 0) {
+                $length = 15;
+            }
+
+            $count += $this->_check[$char] * $length;
+            --$length;
+        }
+        $check .= array_search(($count % 47), $this->_check);
+
+        if ($check == $checksum) {
+            return true;
+        }
+
+        return false;
+    }
+}