1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- A D A . N U M E R I C S . F L O A T _ R A N D O M -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2010, Free Software Foundation, Inc. -- 10-- -- 11-- This specification is derived from the Ada Reference Manual for use with -- 12-- GNAT. The copyright notice above, and the license provisions that follow -- 13-- apply solely to the contents of the part following the private keyword. -- 14-- -- 15-- GNAT is free software; you can redistribute it and/or modify it under -- 16-- terms of the GNU General Public License as published by the Free Soft- -- 17-- ware Foundation; either version 3, or (at your option) any later ver- -- 18-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 19-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 20-- or FITNESS FOR A PARTICULAR PURPOSE. -- 21-- -- 22-- As a special exception under Section 7 of GPL version 3, you are granted -- 23-- additional permissions described in the GCC Runtime Library Exception, -- 24-- version 3.1, as published by the Free Software Foundation. -- 25-- -- 26-- You should have received a copy of the GNU General Public License and -- 27-- a copy of the GCC Runtime Library Exception along with this program; -- 28-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 29-- <http://www.gnu.org/licenses/>. -- 30-- -- 31-- GNAT was originally developed by the GNAT team at New York University. -- 32-- Extensive contributions were provided by Ada Core Technologies Inc. -- 33-- -- 34------------------------------------------------------------------------------ 35 36-- Note: the implementation used in this package is a version of the 37-- Mersenne Twister. See s-rannum.adb for details and references. 38 39with System.Random_Numbers; 40 41package Ada.Numerics.Float_Random is 42 43 -- Basic facilities 44 45 type Generator is limited private; 46 47 subtype Uniformly_Distributed is Float range 0.0 .. 1.0; 48 49 function Random (Gen : Generator) return Uniformly_Distributed; 50 51 procedure Reset (Gen : Generator); 52 procedure Reset (Gen : Generator; Initiator : Integer); 53 54 -- Advanced facilities 55 56 type State is private; 57 58 procedure Save (Gen : Generator; To_State : out State); 59 procedure Reset (Gen : Generator; From_State : State); 60 61 Max_Image_Width : constant := System.Random_Numbers.Max_Image_Width; 62 63 function Image (Of_State : State) return String; 64 function Value (Coded_State : String) return State; 65 66private 67 68 type Generator is new System.Random_Numbers.Generator; 69 70 type State is new System.Random_Numbers.State; 71 72end Ada.Numerics.Float_Random; 73