Re: Querying terminal's ability to do unicode

[Thomas Dickey]

On Wed, Dec 27, 2017 at 04:12:37PM +0000, Mike Gran wrote:
> Hi.
> 
> So I'm writing an application to which a client will connect by telnet.
> It links ncursesw, and formw.
> 
> On connection, the application asks the user
> "Enter terminal (or just hit return for xterm-256color)"
> 
> Once I get this terminal string from the user, how do I query the
> terminfo to see if this user can get Unicode, or just G0/G1 Latin1,
> or just ASCII?
> 
> There are some related properties: smacs, rmacs, set1_desc_seq,
> but I don't know how to unpack that to answer my question.

The information isn't in the terminal database.  There's no portable
method for determining the encoding that the terminal supports.

Try this - with the caveat that the actual values are system-dependent,
just like the locale environment variables:

        result = nl_langinfo(CODESET);

http://pubs.opengroup.org/onlinepubs/9699919799/functions/nl_langinfo.html

-- 
Thomas E. Dickey <address@hidden>
https://invisible-island.net
ftp://ftp.invisible-island.net

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