/*
 *  call-seq:
 *    attribute_nodes()
 *
 *  returns a list containing the Node attributes.
 */
static VALUE attribute_nodes(VALUE self)
{
    /* this code in the mode of xmlHasProp() */
    xmlNodePtr node;
    VALUE attr;

    Data_Get_Struct(self, xmlNode, node);

    attr = rb_ary_new();
    Nokogiri_xml_node_properties(node, attr);

    return attr ;
}