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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . N U M E R I C S . D I S C R E T E _ R A N D O M --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2024, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Note: the implementation used in this package is a version of the
-- Mersenne Twister. See s-rannum.adb for details and references.
-- It is suitable for simulations, but should not be used as a cryptographic
-- pseudo-random source.
with System.Random_Numbers;
generic
type Result_Subtype is (<>);
package Ada.Numerics.Discrete_Random with
SPARK_Mode => Off
is
-- Basic facilities
type Generator is limited private;
function Random (Gen : Generator) return Result_Subtype;
function Random
(Gen : Generator;
First : Result_Subtype;
Last : Result_Subtype) return Result_Subtype
with Post => Random'Result in First .. Last;
procedure Reset (Gen : Generator; Initiator : Integer);
procedure Reset (Gen : Generator);
-- Advanced facilities
type State is private;
procedure Save (Gen : Generator; To_State : out State);
procedure Reset (Gen : Generator; From_State : State);
Max_Image_Width : constant := System.Random_Numbers.Max_Image_Width;
function Image (Of_State : State) return String;
function Value (Coded_State : String) return State;
private
type Generator is new System.Random_Numbers.Generator;
type State is new System.Random_Numbers.State;
end Ada.Numerics.Discrete_Random;
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