home *** CD-ROM | disk | FTP | other *** search
- ------------------------------------------------------------------------------
- -- --
- -- GNAT RUNTIME COMPONENTS --
- -- --
- -- A D A . N U M E R I C S . F L O A T _ R A N D O M --
- -- --
- -- B o d y --
- -- --
- -- $Revision: 1.10 $ --
- -- --
- -- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
- -- --
- -- The GNAT library is free software; you can redistribute it and/or modify --
- -- it under terms of the GNU Library General Public License as published by --
- -- the Free Software Foundation; either version 2, or (at your option) any --
- -- later version. The GNAT 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 --
- -- Library General Public License for more details. You should have --
- -- received a copy of the GNU Library General Public License along with --
- -- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
- -- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
- -- --
- ------------------------------------------------------------------------------
-
- -- This implementation is derived from LSN 1055 written by Ken Dritz.
-
- with Ada.Calendar;
- with Unchecked_Deallocation;
-
- package body Ada.Numerics.Float_Random is
-
- --------------
- -- Finalize --
- --------------
-
- procedure Finalize (Gen : in out Generator) is
-
- procedure Destroy_State is
- new Unchecked_Deallocation (ANR.State, Access_State);
-
- begin
- Destroy_State (Gen.State);
- end Finalize;
-
- -----------
- -- Image --
- -----------
-
- function Image (Of_State : State) return String is
- begin
- return ANR.Image (ANR.State (Of_State));
- end Image;
-
- ------------
- -- Random --
- ------------
-
- function Random (Gen : Generator) return Uniformly_Distributed is
- U : Float;
-
- begin
- ANR.Random (Gen.State.all, U);
- return U;
- end Random;
-
- -----------
- -- Reset --
- -----------
-
- procedure Reset (Gen : in Generator; Initiator : in Integer) is
- begin
- ANR.Reset (Gen.State.all, Initiator);
- end Reset;
-
- procedure Reset (Gen : in Generator) is
- begin
- ANR.Reset (Gen.State.all);
- end Reset;
-
- procedure Reset (Gen : in Generator; From_State : in State) is
- begin
- Gen.State.all := ANR.State (From_State);
- end Reset;
-
- ----------
- -- Save --
- ----------
-
- procedure Save (Gen : in Generator; To_State : out State) is
- begin
- To_State := State (Gen.State.all);
- end Save;
-
- -----------
- -- Value --
- -----------
-
- function Value (Coded_State : String) return State is
- begin
- return State (ANR.Value (Coded_State));
- end Value;
-
- end Ada.Numerics.Float_Random;
-