X-Git-Url: http://git.nguyen.vg/gitweb/?a=blobdiff_plain;f=XMLTree.cpp;h=21658e99c323c4aaaff8b72e385d8580542bddf4;hb=60f0f1a447b2b89ca99589c68333d72bcdeb263d;hp=3c51b2ffb92d1c3808237738382193f918152d2c;hpb=9b3825663e88360c57dfe66cee5330f8f80fb452;p=SXSI%2FXMLTree.git

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.