Re: Properly setting a cchart_t to WACS value

[Thomas Dickey]

On Wed, Dec 19, 2018 at 09:07:57PM -0600, Bryan Christ wrote:
> I'm looking through the API documentation and not seeing an easy way to
> stuff the results of NCURSES_WACS(x) into a cchar_t and then modify the
> internals.  Based on what I've read so far, the implementations of cchar_t
> varies greatly which means it's not wise to write code that access the
> struct members directly.  The recommended way seems to be to use getcchar()
> and setcchar().  That being true, therein lies my question.  As best I can
> tell, to store the results of NCURSES_WACS(x) for use later I would have to:
> 
> cchar_t my_cchar;
> wchar_t *data;
> attr_t attrs;
> short color_pair;
> memcpy(&my_cchar, NCURSES_WACS(x), sizeof(my_cchar));
> getcchar(&my_cchar, data, &attrs, &color_pair, NULL);
> attrs = some_attry;
> color_pair = some_color_pair;
> setcchar(&my_cchar, data, attrs, color_pair, NULL);
> 
> Now, assuming I have all of that right, it seems pretty "heavy" just to
> achieve the desired result for a single cchar_t.  Am I going about this all
> wrong?

If you're working on making the result portable across "any" X/Open Curses,
I suppose it's the way to go.  But for your example, I'd expect that the
color and attributes normally would be applied using the background character
or window attributes.

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

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