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-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2010, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32package body Ada.Numerics.Float_Random is 33 34 package SRN renames System.Random_Numbers; 35 use SRN; 36 37 ----------- 38 -- Image -- 39 ----------- 40 41 function Image (Of_State : State) return String is 42 begin 43 return Image (SRN.State (Of_State)); 44 end Image; 45 46 ------------ 47 -- Random -- 48 ------------ 49 50 function Random (Gen : Generator) return Uniformly_Distributed is 51 begin 52 return Random (SRN.Generator (Gen)); 53 end Random; 54 55 ----------- 56 -- Reset -- 57 ----------- 58 59 -- Version that works from calendar 60 61 procedure Reset (Gen : Generator) is 62 begin 63 Reset (SRN.Generator (Gen)); 64 end Reset; 65 66 -- Version that works from given initiator value 67 68 procedure Reset (Gen : Generator; Initiator : Integer) is 69 begin 70 Reset (SRN.Generator (Gen), Initiator); 71 end Reset; 72 73 -- Version that works from specific saved state 74 75 procedure Reset (Gen : Generator; From_State : State) is 76 begin 77 Reset (SRN.Generator (Gen), From_State); 78 end Reset; 79 80 ---------- 81 -- Save -- 82 ---------- 83 84 procedure Save (Gen : Generator; To_State : out State) is 85 begin 86 Save (SRN.Generator (Gen), To_State); 87 end Save; 88 89 ----------- 90 -- Value -- 91 ----------- 92 93 function Value (Coded_State : String) return State is 94 G : SRN.Generator; 95 S : SRN.State; 96 begin 97 Reset (G, Coded_State); 98 Save (G, S); 99 return State (S); 100 end Value; 101 102end Ada.Numerics.Float_Random; 103