File : ffa_rng.adb
1 ------------------------------------------------------------------------------
2 ------------------------------------------------------------------------------
3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'. --
4 -- --
5 -- (C) 2019 Stanislav Datskovskiy ( www.loper-os.org ) --
6 -- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html --
7 -- --
8 -- You do not have, nor can you ever acquire the right to use, copy or --
9 -- distribute this software ; Should you use this software for any purpose, --
10 -- or copy and distribute it to anyone or in any manner, you are breaking --
11 -- the laws of whatever soi-disant jurisdiction, and you promise to --
12 -- continue doing so for the indefinite future. In any case, please --
13 -- always : read and understand any software ; verify any PGP signatures --
14 -- that you use - for any purpose. --
15 -- --
16 -- See also http://trilema.com/2015/a-new-software-licensing-paradigm . --
17 ------------------------------------------------------------------------------
18 ------------------------------------------------------------------------------
19
20 with OS; use OS;
21 with FFA; use FFA;
22
23
24 package body FFA_RNG is
25
26 -- Prepare an RNG for use; at given path, or will use default
27 procedure Init_RNG(RNG : out RNG_Device;
28 RNG_Unix_Path : in String := Default_RNG_Path) is
29 begin
30 begin
31 -- Open the RNG at the offered path:
32 Word_IO.Open(File => RNG.F,
33 Mode => Word_IO.In_File,
34 Name => RNG_Unix_Path);
35 exception
36 when others =>
37 Eggog("Could not open RNG at : " & RNG_Unix_Path & "!");
38 end;
39 end Init_RNG;
40
41
42 -- Fill a FZ from RNG
43 procedure FZ_Random(RNG : in RNG_Device;
44 N : out FZ) is
45 begin
46 begin
47 -- Fill the destination FZ from this RNG:
48 for i in N'Range loop
49 Word_IO.Read(RNG.F, N(i));
50 end loop;
51 exception
52 when others =>
53 Eggog("Could not read from RNG!");
54 end;
55 end FZ_Random;
56
57 end FFA_RNG;