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From: Leslie <jlturriff@centurytel.net>
Newsgroups: comp.lang.ada
Subject: Re: How to convert a string containing two hex digits to a character?
Date: Tue, 05 Jan 2010 18:43:41 -0600
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Date: 2010-01-05T18:43:41-06:00
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Leslie wrote:

> Hi, it's me again. :-)
> 
>         I need to be able to convert a string variable
>         containing two
> hexadecimal digits (e.g. "7C") to its equivalent character
> value.  I see from ARM 3.5.5 "Operations of Discrete Types"
> that I can use
> 
>   function S'Val(Arg : universal_integer) return S'Base
> 
> where universal_integer would be the numeric value of the
> string, but how do I get from "7C" to 16#7C# when 7C is a
> string value,
> not a constant?  I.e.,
> 
OOPS!  Should be
>   Hex_Pair : unbounded_string;
>   Char_Code : character;    -- moved this out of the block. :-)
> 
>   begin
>     Hex_Pair := slice(some_string,1,2);
>     -- now what?
>   end;
> 
> Leslie