dst->tagname[sizeof(dst->tagname) - 1] = '\0';
dst->match_tagname[sizeof(dst->match_tagname) - 1] = '\0';
dst->overload_tblname[sizeof(dst->overload_tblname) - 1] = '\0';
dst->tagname[sizeof(dst->tagname) - 1] = '\0';
dst->match_tagname[sizeof(dst->match_tagname) - 1] = '\0';
dst->overload_tblname[sizeof(dst->overload_tblname) - 1] = '\0';