From: kim <kim@3cdefd35-fc62-479d-8e8d-bae585ffb9ca>
Date: Tue, 27 Jan 2009 00:53:35 +0000 (+0000)
Subject: Add check for Root Node to the parent function
X-Git-Url: http://git.nguyen.vg/gitweb/?a=commitdiff_plain;ds=sidebyside;h=22ee86b6a6088bf49747da202d619439fd8880e2;p=SXSI%2FXMLTree.git

Add check for Root Node to the parent function


git-svn-id: svn+ssh://idea.nguyen.vg/svn/sxsi/trunk/XMLTree@66 3cdefd35-fc62-479d-8e8d-bae585ffb9ca
---

diff --git a/XMLTree.cpp b/XMLTree.cpp
index 3c51b2f..21658e9 100644
--- a/XMLTree.cpp
+++ b/XMLTree.cpp
@@ -311,8 +311,10 @@ treeNode XMLTree::Parent(treeNode x)
        fprintf(stderr, "Error: data structure has not been constructed properly\n");
        exit(1);
     }
-
-    return parent(Par, x);
+    if (x == Root())
+      return NULLT;
+    else
+      return parent(Par, x);
  }
 
 // Child(x,i): returns the i-th child of node x, assuming it exists.