/* 
 *  call-seq:
 *     iw << document -> iw
 *     iw.add_document(document) -> iw
 *
 *  Add a document to the index. See Document. A document can also be a simple
 *  hash object.
 */
static VALUE
frt_iw_add_doc(VALUE self, VALUE rdoc)
{
    IndexWriter *iw = (IndexWriter *)DATA_PTR(self);
    Document *doc = frt_get_doc(rdoc);
    iw_add_doc(iw, doc);
    doc_destroy(doc);
    return self;
}