// Look up a node in a sub-node's b-tree
public static Node LookupSubNode(BTree <Node> subNodeTree, NID nid)
{
if (subNodeTree == null)
{
throw new XstException("No sub node data tree found");
}
return(subNodeTree.Lookup(nid.dwValue));
}
// Look up a data block in the main data block b-tree
public DataRef LookupDataBlock(UInt64 dataBid)
{
// Clear the LSB, which is reserved, but sometimes set
return(dataTree.Lookup(dataBid & 0xfffffffe, deferredReadAction));
}
// Look up a node in the main node b-tree
public Node LookupNode(NID nid)
{
return(nodeTree.Lookup(nid.dwValue, deferredReadAction));
}