--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Memory/Value.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,177 @@
+<?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_Memory
+ * @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: Value.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+
+/**
+ * String value object
+ *
+ * It's an OO string wrapper.
+ * Used to intercept string updates.
+ *
+ * @category   Zend
+ * @package    Zend_Memory
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @todo       also implement Countable for PHP 5.1 but not yet to stay 5.0 compatible
+ */
+class Zend_Memory_Value implements ArrayAccess {
+    /**
+     * Value
+     *
+     * @var string
+     */
+    private $_value;
+
+    /**
+     * Container
+     *
+     * @var Zend_Memory_Container_Interface
+     */
+    private $_container;
+
+    /**
+     * Boolean flag which signals to trace value modifications
+     *
+     * @var boolean
+     */
+    private $_trace;
+
+
+    /**
+     * Object constructor
+     *
+     * @param string $value
+     * @param Zend_Memory_Container_Movable $container
+     */
+    public function __construct($value, Zend_Memory_Container_Movable $container)
+    {
+        $this->_container = $container;
+
+        $this->_value = (string)$value;
+
+        /**
+         * Object is marked as just modified by memory manager
+         * So we don't need to trace followed object modifications and
+         * object is processed (and marked as traced) when another
+         * memory object is modified.
+         *
+         * It reduces overall numberr of calls necessary to modification trace
+         */
+        $this->_trace = false;
+    }
+
+
+    /**
+     * ArrayAccess interface method
+     * returns true if string offset exists
+     *
+     * @param integer $offset
+     * @return boolean
+     */
+    public function offsetExists($offset)
+    {
+        return $offset >= 0  &&  $offset < strlen($this->_value);
+    }
+
+    /**
+     * ArrayAccess interface method
+     * Get character at $offset position
+     *
+     * @param integer $offset
+     * @return string
+     */
+    public function offsetGet($offset)
+    {
+        return $this->_value[$offset];
+    }
+
+    /**
+     * ArrayAccess interface method
+     * Set character at $offset position
+     *
+     * @param integer $offset
+     * @param string $char
+     */
+    public function offsetSet($offset, $char)
+    {
+        $this->_value[$offset] = $char;
+
+        if ($this->_trace) {
+            $this->_trace = false;
+            $this->_container->processUpdate();
+        }
+    }
+
+    /**
+     * ArrayAccess interface method
+     * Unset character at $offset position
+     *
+     * @param integer $offset
+     */
+    public function offsetUnset($offset)
+    {
+        unset($this->_value[$offset]);
+
+        if ($this->_trace) {
+            $this->_trace = false;
+            $this->_container->processUpdate();
+        }
+    }
+
+
+    /**
+     * To string conversion
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->_value;
+    }
+
+
+    /**
+     * Get string value reference
+     *
+     * _Must_ be used for value access before PHP v 5.2
+     * or _may_ be used for performance considerations
+     *
+     * @internal
+     * @return string
+     */
+    public function &getRef()
+    {
+        return $this->_value;
+    }
+
+    /**
+     * Start modifications trace
+     *
+     * _Must_ be used for value access before PHP v 5.2
+     * or _may_ be used for performance considerations
+     *
+     * @internal
+     */
+    public function startTrace()
+    {
+        $this->_trace = true;
+    }
+}