--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Pdf/Element/Reference/Table.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,198 @@
+<?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_Pdf
+ * @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: Table.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+
+/**
+ * PDF file reference table
+ *
+ * @category   Zend
+ * @package    Zend_Pdf
+ * @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_Pdf_Element_Reference_Table
+{
+    /**
+     * Parent reference table
+     *
+     * @var Zend_Pdf_Element_Reference_Table
+     */
+    private $_parent;
+
+    /**
+     * Free entries
+     * 'reference' => next free object number
+     *
+     * @var array
+     */
+    private $_free;
+
+    /**
+     * Generation numbers for free objects.
+     * Array: objNum => nextGeneration
+     *
+     * @var array
+     */
+    private $_generations;
+
+    /**
+     * In use entries
+     * 'reference' => offset
+     *
+     * @var array
+     */
+    private $_inuse;
+
+    /**
+     * Generation numbers for free objects.
+     * Array: objNum => objGeneration
+     *
+     * @var array
+     */
+    private $_usedObjects;
+
+
+
+    /**
+     * Object constructor
+     */
+    public function  __construct()
+    {
+        $this->_parent = null;
+        $this->_free   = array();  $this->_generations = array();
+        $this->_inuse  = array();  $this->_usedObjects = array();
+    }
+
+
+    /**
+     * Add reference to the reference table
+     *
+     * @param string $ref
+     * @param integer $offset
+     * @param boolean $inuse
+     */
+    public function addReference($ref, $offset, $inuse = true)
+    {
+        $refElements = explode(' ', $ref);
+        if (!is_numeric($refElements[0]) || !is_numeric($refElements[1]) || $refElements[2] != 'R') {
+            require_once 'Zend/Pdf/Exception.php';
+            throw new Zend_Pdf_Exception("Incorrect reference: '$ref'");
+        }
+        $objNum = (int)$refElements[0];
+        $genNum = (int)$refElements[1];
+
+        if ($inuse) {
+            $this->_inuse[$ref]          = $offset;
+            $this->_usedObjects[$objNum] = $objNum;
+        } else {
+            $this->_free[$ref]           = $offset;
+            $this->_generations[$objNum] = $genNum;
+        }
+    }
+
+
+    /**
+     * Set parent reference table
+     *
+     * @param Zend_Pdf_Element_Reference_Table $parent
+     */
+    public function setParent(self $parent)
+    {
+        $this->_parent = $parent;
+    }
+
+
+    /**
+     * Get object offset
+     *
+     * @param string $ref
+     * @return integer
+     */
+    public function getOffset($ref)
+    {
+        if (isset($this->_inuse[$ref])) {
+            return $this->_inuse[$ref];
+        }
+
+        if (isset($this->_free[$ref])) {
+            return null;
+        }
+
+        if (isset($this->_parent)) {
+            return $this->_parent->getOffset($ref);
+        }
+
+        return null;
+    }
+
+
+    /**
+     * Get next object from a list of free objects.
+     *
+     * @param string $ref
+     * @return integer
+     * @throws Zend_Pdf_Exception
+     */
+    public function getNextFree($ref)
+    {
+        if (isset($this->_inuse[$ref])) {
+            require_once 'Zend/Pdf/Exception.php';
+            throw new Zend_Pdf_Exception('Object is not free');
+        }
+
+        if (isset($this->_free[$ref])) {
+            return $this->_free[$ref];
+        }
+
+        if (isset($this->_parent)) {
+            return $this->_parent->getNextFree($ref);
+        }
+
+        require_once 'Zend/Pdf/Exception.php';
+        throw new Zend_Pdf_Exception('Object not found.');
+    }
+
+
+    /**
+     * Get next generation number for free object
+     *
+     * @param integer $objNum
+     * @return unknown
+     */
+    public function getNewGeneration($objNum)
+    {
+        if (isset($this->_usedObjects[$objNum])) {
+            require_once 'Zend/Pdf/Exception.php';
+            throw new Zend_Pdf_Exception('Object is not free');
+        }
+
+        if (isset($this->_generations[$objNum])) {
+            return $this->_generations[$objNum];
+        }
+
+        if (isset($this->_parent)) {
+            return $this->_parent->getNewGeneration($objNum);
+        }
+
+        require_once 'Zend/Pdf/Exception.php';
+        throw new Zend_Pdf_Exception('Object not found.');
+    }
+}