From 9939d45f997d2855218e3acf5b51222e9680ce31 Mon Sep 17 00:00:00 2001
From: Ricardo Markiewicz <rmarkie@fi.uba.ar>
Date: Fri, 23 Sep 2005 20:13:52 +0000
Subject: [PATCH] Protecciones contra cuelgues.

---
 viewer/view_btree.cpp | 11 +++++++++++
 viewer/view_btree.h   |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/viewer/view_btree.cpp b/viewer/view_btree.cpp
index f62e931..5c54a87 100644
--- a/viewer/view_btree.cpp
+++ b/viewer/view_btree.cpp
@@ -23,6 +23,12 @@ ViewBTree::ViewBTree (Canvas::Group *parent, std::string filename):Canvas::Group
 
 void ViewBTree::AddNode (uint num)
 {
+	if (node_placed[num]) {
+		std::cout << "WARNING : Tratando de agregar de nuevo el nodo " << num << std::endl;
+		return;
+	}
+
+	node_placed[num] = true;
 	/* Muestro la raiz */
 	double y = 0;
 	uchar *node = ReadBlock (num);
@@ -46,6 +52,11 @@ void ViewBTree::AddNode (uint num)
 	std::list<uint> childs = vnode->getChilds ();
 	std::list<uint>::iterator hit = childs.begin ();
 	while (hit != childs.end ()) {
+		if ((*hit) == 0) {
+			std::cout << "WARNING : Referencia a 0 encontrada!!" << std::endl;
+			hit = childs.end ();
+			continue;
+		}
 		AddNode (*hit);
 		hit++;
 	}
diff --git a/viewer/view_btree.h b/viewer/view_btree.h
index bd4f22c..e3a5c68 100644
--- a/viewer/view_btree.h
+++ b/viewer/view_btree.h
@@ -21,6 +21,9 @@ class ViewBTree : public Canvas::Group, public BTree {
 		int max_level; /* Lo saco de la raiz */
 		/* Posicion X por nivel */
 		std::map<uint,double> pos_x;
+		/* Control para no poner 2 veces un nodo */
+		/* Un nodo que quiera ser puesto 2 veces es un bug :) */
+		std::map<uint,bool> node_placed;
 
 		void AddNode (uint num);
 
-- 
2.43.0