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ffa_ch4_ffacalc.kv      1 ------------------------------------------------------------------------------
ffa_ch4_ffacalc.kv      2 ------------------------------------------------------------------------------
ffa_ch4_ffacalc.kv      3 -- This file is part of 'Finite Field Arithmetic', aka 'FFA'.               --
ffa_ch4_ffacalc.kv      4 --                                                                          --
ffa_ch4_ffacalc.kv      5 -- (C) 2017 Stanislav Datskovskiy ( www.loper-os.org )                      --
ffa_ch4_ffacalc.kv      6 -- http://wot.deedbot.org/17215D118B7239507FAFED98B98228A001ABFFC7.html     --
ffa_ch4_ffacalc.kv      7 --                                                                          --
ffa_ch4_ffacalc.kv      8 -- You do not have, nor can you ever acquire the right to use, copy or      --
ffa_ch4_ffacalc.kv      9 -- distribute this software ; Should you use this software for any purpose, --
ffa_ch4_ffacalc.kv     10 -- or copy and distribute it to anyone or in any manner, you are breaking   --
ffa_ch4_ffacalc.kv     11 -- the laws of whatever soi-disant jurisdiction, and you promise to         --
ffa_ch4_ffacalc.kv     12 -- continue doing so for the indefinite future. In any case, please         --
ffa_ch4_ffacalc.kv     13 -- always : read and understand any software ; verify any PGP signatures    --
ffa_ch4_ffacalc.kv     14 -- that you use - for any purpose.                                          --
ffa_ch4_ffacalc.kv     15 --                                                                          --
ffa_ch4_ffacalc.kv     16 -- See also http://trilema.com/2015/a-new-software-licensing-paradigm .     --
ffa_ch4_ffacalc.kv     17 ------------------------------------------------------------------------------
ffa_ch4_ffacalc.kv     18 ------------------------------------------------------------------------------
ffa_ch4_ffacalc.kv     19 
ffa_ch4_ffacalc.kv     20 with Interfaces;   use Interfaces;
ffa_ch4_ffacalc.kv     21 with Interfaces.C; use Interfaces.C;
ffa_ch4_ffacalc.kv     22 
ffa_ch4_ffacalc.kv     23 
ffa_ch4_ffacalc.kv     24 package OS is
ffa_ch4_ffacalc.kv     25    
ffa_ch4_ffacalc.kv     26    -- Receive a character from the TTY, and True if success (False if EOF)
ffa_ch4_ffacalc.kv     27    function Read_Char(C : out Character) return Boolean;
ffa_ch4_ffacalc.kv     28    
ffa_ch4_ffacalc.kv     29    -- Send a character to the TTY.
ffa_ch4_ffacalc.kv     30    procedure Write_Char(C : in Character);
ffa_ch4_ffacalc.kv     31    
ffa_ch4_ffacalc.kv     32    -- Send a Newline to the TTY.
ffa_ch4_ffacalc.kv     33    procedure Write_Newline;
ffa_ch4_ffacalc.kv     34    
ffa_ch4_ffacalc.kv     35    -- Exit with an error condition report.
ffa_ch4_ffacalc.kv     36    procedure Eggog(M : String);
ffa_ch4_ffacalc.kv     37    
ffa_ch4_ffacalc.kv     38    procedure Quit(Return_Code : Integer);
ffa_ch4_ffacalc.kv     39    pragma Import
ffa_ch4_ffacalc.kv     40      (Convention    => C,
ffa_ch4_ffacalc.kv     41       Entity        => Quit,
ffa_ch4_ffacalc.kv     42       External_Name => "exit");
ffa_ch4_ffacalc.kv     43    
ffa_ch4_ffacalc.kv     44 private
ffa_ch4_ffacalc.kv     45    
ffa_ch4_ffacalc.kv     46    -- POSIX stdio:   
ffa_ch4_ffacalc.kv     47    EOF : constant int := -1;
ffa_ch4_ffacalc.kv     48 
ffa_ch4_ffacalc.kv     49    function GetChar return int;
ffa_ch4_ffacalc.kv     50    pragma Import(C, getchar);
ffa_ch4_ffacalc.kv     51    
ffa_ch4_ffacalc.kv     52    function PutChar(item: int) return int;
ffa_ch4_ffacalc.kv     53    pragma Import(C, putchar);
ffa_ch4_ffacalc.kv     54    
ffa_ch4_ffacalc.kv     55    -- GNATistic
ffa_ch4_ffacalc.kv     56    procedure To_Stderr(C : Character);
ffa_ch4_ffacalc.kv     57    pragma Import(Ada, To_Stderr, "__gnat_to_stderr_char");
ffa_ch4_ffacalc.kv     58    
ffa_ch4_ffacalc.kv     59    Sadness_Code : constant Integer := -1;
ffa_ch4_ffacalc.kv     60    
ffa_ch4_ffacalc.kv     61 end OS;