val open_file : (char Ctypes_static.ptr -> int -> T.Mmdb.t -> int F.return) F.resultval close : (T.Mmdb.t -> unit F.return) F.resultval lookup_string : (T.Mmdb.t -> char Ctypes_static.ptr -> int Ctypes_static.ptr -> int Ctypes_static.ptr -> T.Lookup_result.t Ctypes.structure F.return) F.resultval aget_value : (T.Entry.t Ctypes.structure Ctypes_static.ptr -> T.Entry_data.t -> char Ctypes_static.ptr Ctypes_static.ptr -> int F.return) F.resultval strerror : (int -> char Ctypes_static.ptr F.return) F.resultval lib_version : (unit -> char Ctypes_static.ptr F.return) F.result