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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 OS;       use OS;
ffa_ch4_ffacalc.kv     21 
ffa_ch4_ffacalc.kv     22 
ffa_ch4_ffacalc.kv     23 with Words;    use Words;
ffa_ch4_ffacalc.kv     24 with W_Shifts; use W_Shifts;
ffa_ch4_ffacalc.kv     25 with FZ_Type;  use FZ_Type;
ffa_ch4_ffacalc.kv     26 
ffa_ch4_ffacalc.kv     27 
ffa_ch4_ffacalc.kv     28 package body FFA_IO is
ffa_ch4_ffacalc.kv     29    
ffa_ch4_ffacalc.kv     30    -- Obtain the WChars corresponding to the given Word
ffa_ch4_ffacalc.kv     31    function W_To_WChars(N : Word) return WChars is
ffa_ch4_ffacalc.kv     32       H      : constant array(0 .. 15) of Character := "0123456789ABCDEF";
ffa_ch4_ffacalc.kv     33       W      : Word := N;
ffa_ch4_ffacalc.kv     34       Result : WChars;
ffa_ch4_ffacalc.kv     35    begin
ffa_ch4_ffacalc.kv     36       for b in WChars'Range loop               -- From bottom to top:
ffa_ch4_ffacalc.kv     37          Result(B) := H(Natural(W and 16#F#)); -- Get current nibble.
ffa_ch4_ffacalc.kv     38          W         := Shift_Right(W, 4);       -- Get the next nibble.
ffa_ch4_ffacalc.kv     39       end loop;
ffa_ch4_ffacalc.kv     40       return Result;
ffa_ch4_ffacalc.kv     41    end W_To_WChars;
ffa_ch4_ffacalc.kv     42    
ffa_ch4_ffacalc.kv     43    
ffa_ch4_ffacalc.kv     44    -- Display a hex representation of W to stdout
ffa_ch4_ffacalc.kv     45    procedure Dump(W : in Word) is
ffa_ch4_ffacalc.kv     46       T : WChars := W_To_WChars(W);
ffa_ch4_ffacalc.kv     47    begin
ffa_ch4_ffacalc.kv     48       for i in reverse T'Range loop
ffa_ch4_ffacalc.kv     49          Write_Char(T(i));
ffa_ch4_ffacalc.kv     50       end loop;
ffa_ch4_ffacalc.kv     51    end Dump;
ffa_ch4_ffacalc.kv     52    
ffa_ch4_ffacalc.kv     53    
ffa_ch4_ffacalc.kv     54    -- Display a hex representation of N to stdout
ffa_ch4_ffacalc.kv     55    procedure Dump(N : in FZ) is
ffa_ch4_ffacalc.kv     56    begin
ffa_ch4_ffacalc.kv     57       for i in reverse N'Range loop
ffa_ch4_ffacalc.kv     58          Dump(N(i));
ffa_ch4_ffacalc.kv     59       end loop;
ffa_ch4_ffacalc.kv     60       
ffa_ch4_ffacalc.kv     61       -- Newline, for clarity.
ffa_ch4_ffacalc.kv     62       Write_Newline;
ffa_ch4_ffacalc.kv     63    end Dump;
ffa_ch4_ffacalc.kv     64    
ffa_ch4_ffacalc.kv     65 end FFA_IO;