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(*
Title: Standard Basis Library: IEEE_REAL Signature.
Author: David Matthews
Copyright David Matthews 2000, 2005
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
(* G&R 2004 status: updated. *)
signature IEEE_REAL =
sig
exception Unordered
datatype real_order = LESS | EQUAL | GREATER | UNORDERED
datatype float_class
= NAN
| INF
| ZERO
| NORMAL
| SUBNORMAL
datatype rounding_mode
= TO_NEAREST
| TO_NEGINF
| TO_POSINF
| TO_ZERO
val setRoundingMode : rounding_mode -> unit
val getRoundingMode : unit -> rounding_mode
type decimal_approx =
{ class : float_class, sign : bool, digits : int list, exp : int }
val toString : decimal_approx -> string
val scan : (char, 'a) StringCvt.reader -> (decimal_approx, 'a) StringCvt.reader
val fromString : string -> decimal_approx option
end;
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