Re: Automatic recognition of some specific coding systems

[Eli Zaretskii <eliz@gnu.org>]

> From: Jürgen Hartmann <juergen_hartmann_@hotmail.com>
> Date: Thu, 26 Feb 2015 23:34:05 +0100
> 
> >   . Similarly, if the cp850 files' contents match some common regexp,
> >     you can customize auto-coding-regexp-alist to force their decoding
> >     by cp850
> 
> That one might do the trick: In my case the only files (at least in
> the big picture) that use the DOS EOL variant are those encoded with
> cp850 and vice versa. So one could think about a regular expression
> that matches this unique EOL pattern.

A more reliable test might be characters whose codepoints are between
128 and 159: those should generally be absent from ISO-8859 encodings.
(Emacs doesn't use this fact for good reasons, but in your specific
case those reasons should not matter, I think.)