X-Git-Url: http://git.nguyen.vg/gitweb/?a=blobdiff_plain;f=XMLTree.cpp;h=22ba4bb9a9e993dd7cdb4c48fbdb9987acd9f75a;hb=184fd5131d257a334c29b0e55b1240fb29dc796b;hp=92360a432535065f46769245eadee9f98515c005;hpb=a9846746dc7a55764591fcc273fd48c6049df962;p=SXSI%2FXMLTree.git

diff --git a/XMLTree.cpp b/XMLTree.cpp
index 92360a4..22ba4bb 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.
@@ -345,7 +347,9 @@ treeNode XMLTree::NextSibling(treeNode x)
        fprintf(stderr, "Error: data structure has not been constructed properly\n");
        exit(1);
     }
-
+    if (x == Root())
+      return NULLT;
+ 
     return next_sibling(Par, x);
  }
 
@@ -842,4 +846,19 @@ unsigned char *XMLTree::GetTagName(TagType tagid)
  }
 
 
-
+TagType XMLTree::RegisterTag(unsigned char *tagname)
+{
+  if (!finished)
+    return NULLT;
+  
+
+  TagType id = XMLTree::GetTagId(tagname);
+  if (id == NULLT){
+    id = ntagnames;
+    ntagnames = ntagnames + 1;    
+    TagName = (unsigned char **) realloc(TagName,ntagnames*(sizeof(unsigned char*)));
+    strcpy((char*)TagName[id], (const char *)tagname);  
+  };
+
+  return id;
+}