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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Out_File , excess line
Date: Mon, 1 Feb 2016 09:32:46 +0100
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Date: 2016-02-01T09:32:46+01:00
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On 01/02/2016 07:22, comicfanzine@gmail.com wrote:
> With Dimitry's method , there is no more the excess line .
>
> However , there is neither no control for handling text by Unbounded_Strings .
>
> Maybe it can be solved by a type conversion betwen  :
> Stream_Element <--> Unbounded_String .
>
> It can't be done with Explicit type conversion .
>
>
> How to do this ?

You cannot do that without knowing the encoding, obviously.

Considering:

1. ASCII, Latin-1, UTF-8 packed into an array of Character
2. A byte = 8-bit machine (except for some DSP it is almost any machine)

Then a Stream_Element can be converted to Character by this way:

    Character'Val (Buffer (Index))

Or, let's take

1. UCS-2, UTF-16 packed into an array of Wide_Character
2. byte = 8-bit, again
3. Big-endian code points

    Wide_Character'Val
    (  Integer (Buffer (Index)) * 256
    +  Integer (Buffer (Index + 1))
    )

For text processing you must consider how do you keep Unicode texts. 
There is basically two reasonable approaches:

1. String with the text stored in UTF-8
2. Wide_Wide_String or an array of code points declared as an integer type.

The second method is rarely used because it wastes memory and 
performance while the advantage of having directly indexed characters is 
negligible for text processing. The first method assumes re-coding if 
the source is not UTF-8.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de