1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- 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 -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2020, 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.Discrete_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 Result_Subtype is 53 function Random is 54 new SRN.Random_Discrete (Result_Subtype, Result_Subtype'First); 55 begin 56 return Random (SRN.Generator (Gen)); 57 end Random; 58 59 function Random 60 (Gen : Generator; 61 First : Result_Subtype; 62 Last : Result_Subtype) return Result_Subtype 63 is 64 subtype Local_Subtype is Result_Subtype range First .. Last; 65 function Random is new SRN.Random_Discrete (Local_Subtype, First); 66 begin 67 return Random (SRN.Generator (Gen)); 68 end Random; 69 70 ----------- 71 -- Reset -- 72 ----------- 73 74 procedure Reset (Gen : Generator) is 75 begin 76 Reset (SRN.Generator (Gen)); 77 end Reset; 78 79 procedure Reset (Gen : Generator; Initiator : Integer) is 80 begin 81 Reset (SRN.Generator (Gen), Initiator); 82 end Reset; 83 84 procedure Reset (Gen : Generator; From_State : State) is 85 begin 86 Reset (SRN.Generator (Gen), SRN.State (From_State)); 87 end Reset; 88 89 ---------- 90 -- Save -- 91 ---------- 92 93 procedure Save (Gen : Generator; To_State : out State) is 94 begin 95 Save (SRN.Generator (Gen), SRN.State (To_State)); 96 end Save; 97 98 ----------- 99 -- Value -- 100 ----------- 101 102 function Value (Coded_State : String) return State is 103 begin 104 return State (SRN.State'(Value (Coded_State))); 105 end Value; 106 107end Ada.Numerics.Discrete_Random; 108