From 0c6471da931839b4e934d87df27ef208c74355c3 Mon Sep 17 00:00:00 2001
From: neoraider <devnull@localhost>
Date: Fri, 11 Apr 2008 10:28:03 +0000
Subject: zoomedit: * Added DTD validation of level files.

---
 src/Instance.cpp | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/Instance.cpp b/src/Instance.cpp
index eb4d9dd..fe4b761 100644
--- a/src/Instance.cpp
+++ b/src/Instance.cpp
@@ -18,6 +18,7 @@
  */
 
 #include <iostream>
+#include <libxml++/validators/dtdvalidator.h>
 #include "Instance.h"
 #include "Gui/Window.h"
 #include "Data/Level.h"
@@ -103,11 +104,15 @@ void Instance::createLevel() {
   root->add_child("rooms");
   root->add_child("gates");
   root->add_child("textures");
+  
+  level = new Data::Level(root);
 }
 
 bool Instance::loadLevel(const Glib::ustring &file) {
-  if(level)
+  if(level) {
     delete level;
+    level = NULL;
+  }
   
   if(levelXml)
     delete levelXml;
@@ -115,8 +120,13 @@ bool Instance::loadLevel(const Glib::ustring &file) {
   levelXml = new xmlpp::DomParser(file);
   xmlpp::Document *doc = levelXml->get_document();
   
-  if(doc && doc->get_root_node())
-    level = new Data::Level(doc->get_root_node());
+  if(!doc || !doc->get_root_node())
+    return false;
+  
+  if(!xmlpp::DtdValidator("level.dtd").validate(doc))
+    return false;
+  
+  level = new Data::Level(doc->get_root_node());
   
   return (level != NULL);
 }
-- 
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