/*
 * call-seq:
 *  new(document, content)
 *
 * Create a new CDATA element on the +document+ with +content+
 */
static VALUE new(int argc, VALUE *argv, VALUE klass)
{
  xmlDocPtr xml_doc;
  VALUE doc;
  VALUE content;
  VALUE rest;

  rb_scan_args(argc, argv, "2*", &doc, &content, &rest);

  Data_Get_Struct(doc, xmlDoc, xml_doc);

  xmlNodePtr node = xmlNewCDataBlock(
      xml_doc->doc,
      NIL_P(content) ? NULL : (const xmlChar *)StringValuePtr(content),
      NIL_P(content) ? 0 : (int)RSTRING_LEN(content)
  );

  NOKOGIRI_ROOT_NODE(node);

  VALUE rb_node = Nokogiri_wrap_xml_node(klass, node);
  rb_obj_call_init(rb_node, argc, argv);

  if(rb_block_given_p()) rb_yield(rb_node);

  return rb_node;
}