// find the next sibling with the given tag and/or attribute/value pair
//data_node *find_next_matching_sibling(const char *name, const char *attribute, const char *matchval);
//data_node const *find_next_matching_sibling(const char *name, const char *attribute, const char *matchval) const;
// add a new child node
public data_node add_child(string name, string value)
{
if (string.IsNullOrEmpty(name)) //if (!name || !*name)
{
return(null);
}
/* new element: create a new node */
data_node node;
node = new data_node(this, name, value);
if (node.get_name() == null || (node.get_value() == null && value != null))
{
//delete node;
return(null);
}
/* add us to the end of the list of siblings */
data_node pnode;
if (m_first_child == null)
{
m_first_child = node;
}
else
{
for (pnode = m_first_child; pnode.m_next != null; pnode = pnode.m_next)
{
}
pnode.m_next = node;
}
return(node);
}