- First implementation of Hdbqueue

- First implementation of new object model for SICS

hipadaba.h

@@ -39,6 +39,7 @@
 #define HIPINTVARAR   5
 #define HIPFLOATVARAR 6
 #define HIPOBJ        7
+#define HIPFUNC       8
 /* -------- callback types */
 #define HCBSET    0
 #define HCBUPDATE 1
@@ -192,7 +193,13 @@ pHdb MakeHipadabaNode(char *name, int datatype, int length);
  */
 void AddHipadabaChild(pHdb  parent, pHdb child, void *callData);
 /**
- * delete a hipadaba node and all its children
+ * Delete only the node data, without invoking any callbacks
+ * @param node The node to delete.
+ */
+void DeleteNodeData(pHdb node);
+/**
+ * delete a hipadaba node and all its children. Then invoke the tree 
+ * change callback to notify listeners.
  * @parma node The node to delete
  * @param callData User data for the tree change callback
  */
@@ -228,6 +235,12 @@ void RemoveHdbNodeFromParent(pHdb node, void *callData);
  * @param root The callback chain to delete
  */
 void DeleteCallbackChain(pHdbCallback root);
+/**
+ * count the numbers of children in thie Hdb node
+ * @param node The node to count children for
+ * @return The number of children
+ */
+int CountHdbChildren(pHdb node);
 /*===================== function protoypes: Callbacks ========================*/
 /**
  * make a new hipdaba callback
@@ -270,6 +283,16 @@ void RemoveHipadabaCallback(pHdb root, int id);
  * @param internalID The internal ID callbacks have to match in order to be removed.
  */
 void InternalRemoveHipadabaCallback(pHdb root, int internalID);
+/**
+ * invoke a callback chain.
+ * @param root The callback chain to invoke
+ * @param node The node reposnible for this callback chain
+ * @param callData Some data belonging to the callback
+ * @param v The new value for this callback
+ * @return 1 on success, 0 on failure
+ */
+int InvokeCallbackChain(pHdbCallback root, pHdb node,
+    void *callData, hdbValue v);
 
 /*============== Parameter Handling ===============================*/
 /**
@@ -290,6 +313,14 @@ int SetHipadabaPar(pHdb node, hdbValue v, void *callData);
  * @return 0 on failure, 1 on success
  */ 
 int UpdateHipadabaPar(pHdb node, hdbValue v, void *callData);
+/**
+ * notify any update listeners that this node has been internally modidifed.
+ * @param node The node modified
+ * @param callData Addtional data for the callback
+ * @return 1 on success, 0 on failure
+ */
+int NotifyHipadabaPar(pHdb node,void *callData);
+
 /**
  * Read a hipadaba parameter
  * @param node The node for which to read the parameter