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