[1.5.0] AttrDef partitioned into HTML, CSS and URI segments. Also, some minor bugs with MultiLength fixed.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@747 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrDef/URI/IPv4.php

@@ -0,0 +1,36 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+/**
+ * Validates an IPv4 address
+ * @author Feyd @ forums.devnetwork.net (public domain)
+ */
+class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
+{
+    
+    /**
+     * IPv4 regex, protected so that IPv6 can reuse it
+     * @protected
+     */
+    var $ip4;
+    
+    function HTMLPurifier_AttrDef_URI_IPv4() {
+        $oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255
+        $this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})";
+    }
+    
+    function validate($aIP, $config, &$context) {
+        
+        if (preg_match('#^' . $this->ip4 . '$#s', $aIP))
+        {
+                return $aIP;
+        }
+        
+        return false;
+        
+    }
+    
+}
+
+?>