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From: Stephen Leake <stephen_leake@stephe-leake.org>
Newsgroups: comp.lang.ada
Subject: Re: Hexadecimal and stream element arrays
References: 
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Date: Tue, 20 Apr 2010 03:25:41 -0400
Message-ID: <82fx2q4mbu.fsf@stephe-leake.org>
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Date: 2010-04-20T03:25:41-04:00
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tonyg <tonythegair@googlemail.com> writes:

> I have some data coming in from a serial port which I want to convert
> to hexadecimal and display on the screen. I was wondering if anyone
> knows of a simple way to do this?

Just to chime in with my generic solution to this (from SAL
http://www.stephe-leake.org/ada/sal.html) :

pragma License (Modified_GPL);

generic
   Width : Natural;
   type Number_Type is mod <>;
function SAL.Generic_Hex_Image (Item : in Number_Type) return String;
--  Return a hexadecimal image of Item, padded with leading zeros to
--  Width. If Width is too small for Item, leading digits are silently
--  truncated.
pragma Pure (SAL.Generic_Hex_Image);

function SAL.Generic_Hex_Image (Item : in Number_Type) return String
is
   Temp : Number_Type := Item;
   Nibble : Number_Type;
   Image : String (1 .. Width);
begin
   for I in reverse Image'Range loop
      Nibble := Temp mod 16;
      Temp := Temp / 16;
      if Nibble > 9 then
         Image (I) := Character'Val (Character'Pos ('A') + Integer (Nibble) - 10);
      else
         Image (I) := Character'Val (Character'Pos ('0') + Integer (Nibble));
      end if;
   end loop;
   return Image;
end SAL.Generic_Hex_Image;

-- 
-- Stephe