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) 1992-2018, 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 with 33 SPARK_Mode => Off 34is 35 36 package SRN renames System.Random_Numbers; 37 use SRN; 38 39 ----------- 40 -- Image -- 41 ----------- 42 43 function Image (Of_State : State) return String is 44 begin 45 return Image (SRN.State (Of_State)); 46 end Image; 47 48 ------------ 49 -- Random -- 50 ------------ 51 52 function Random (Gen : Generator) return Uniformly_Distributed is 53 begin 54 return Random (SRN.Generator (Gen)); 55 end Random; 56 57 ----------- 58 -- Reset -- 59 ----------- 60 61 -- Version that works from calendar 62 63 procedure Reset (Gen : Generator) is 64 begin 65 Reset (SRN.Generator (Gen)); 66 end Reset; 67 68 -- Version that works from given initiator value 69 70 procedure Reset (Gen : Generator; Initiator : Integer) is 71 begin 72 Reset (SRN.Generator (Gen), Initiator); 73 end Reset; 74 75 -- Version that works from specific saved state 76 77 procedure Reset (Gen : Generator; From_State : State) is 78 begin 79 Reset (SRN.Generator (Gen), From_State); 80 end Reset; 81 82 ---------- 83 -- Save -- 84 ---------- 85 86 procedure Save (Gen : Generator; To_State : out State) is 87 begin 88 Save (SRN.Generator (Gen), To_State); 89 end Save; 90 91 ----------- 92 -- Value -- 93 ----------- 94 95 function Value (Coded_State : String) return State is 96 G : SRN.Generator; 97 S : SRN.State; 98 begin 99 Reset (G, Coded_State); 100 Save (G, S); 101 return State (S); 102 end Value; 103 104end Ada.Numerics.Float_Random; 105