1 (***********************************************************************)
5 (* Valerie Menissier-Morain, projet Cristal, INRIA Rocquencourt *)
7 (* Copyright 1996 Institut National de Recherche en Informatique et *)
8 (* en Automatique. All rights reserved. This file is distributed *)
9 (* under the terms of the GNU Library General Public License, with *)
10 (* the special exception on linking described in file ../../LICENSE. *)
12 (***********************************************************************)
14 (* $Id: arith_status.mli 4144 2001-12-07 13:41:02Z xleroy $ *)
16 (** Flags that control rational arithmetic. *)
18 val arith_status: unit -> unit
19 (** Print the current status of the arithmetic flags. *)
21 val get_error_when_null_denominator : unit -> bool
22 (** See {!Arith_status.set_error_when_null_denominator}.*)
23 val set_error_when_null_denominator : bool -> unit
24 (** Get or set the flag [null_denominator]. When on, attempting to
25 create a rational with a null denominator raises an exception.
26 When off, rationals with null denominators are accepted.
29 val get_normalize_ratio : unit -> bool
30 (** See {!Arith_status.set_normalize_ratio}.*)
31 val set_normalize_ratio : bool -> unit
32 (** Get or set the flag [normalize_ratio]. When on, rational
33 numbers are normalized after each operation. When off,
34 rational numbers are not normalized until printed.
37 val get_normalize_ratio_when_printing : unit -> bool
38 (** See {!Arith_status.set_normalize_ratio_when_printing}.*)
39 val set_normalize_ratio_when_printing : bool -> unit
40 (** Get or set the flag [normalize_ratio_when_printing].
41 When on, rational numbers are normalized before being printed.
42 When off, rational numbers are printed as is, without normalization.
45 val get_approx_printing : unit -> bool
46 (** See {!Arith_status.set_approx_printing}.*)
47 val set_approx_printing : bool -> unit
48 (** Get or set the flag [approx_printing].
49 When on, rational numbers are printed as a decimal approximation.
50 When off, rational numbers are printed as a fraction.
53 val get_floating_precision : unit -> int
54 (** See {!Arith_status.set_floating_precision}.*)
55 val set_floating_precision : int -> unit
56 (** Get or set the parameter [floating_precision].
57 This parameter is the number of digits displayed when
58 [approx_printing] is on.