attribute_nodes (Nokogiri::XML::Reader)

    /*
     * call-seq:
     *   attribute_nodes
     *
     * Get a list of attributes for this Node
     */
    static VALUE attribute_nodes(VALUE self)
    {
      xmlTextReaderPtr reader;
      VALUE attr ;

      Data_Get_Struct(self, xmlTextReader, reader);

      attr = rb_ary_new() ;

      if (! has_attributes(reader))
        return attr ;

      xmlNodePtr ptr = xmlTextReaderExpand(reader);
      if(ptr == NULL) return Qnil;

      // FIXME I'm not sure if this is correct.....  I don't really like pointing
      // at this document, but I have to because of the assertions in
      // the node wrapping code.
      if(! DOC_RUBY_OBJECT_TEST(ptr->doc)) {
        VALUE rb_doc = Nokogiri_wrap_xml_document(cNokogiriXmlDocument, ptr->doc);
        RDATA(rb_doc)->dfree = NULL;
      }
      VALUE enc = rb_iv_get(self, "@encoding");

      if(enc != Qnil && NULL == ptr->doc->encoding) {
        ptr->doc->encoding = calloc((size_t)RSTRING_LEN(enc), sizeof(char));
        strncpy(
          (char *)ptr->doc->encoding,
          StringValuePtr(enc),
          (size_t)RSTRING_LEN(enc)
        );
      }

      Nokogiri_xml_node_properties(ptr, attr);

      return attr ;
    }