Re: What, exactly, _is_ "line-breakout optimization"?

[Benno Schulenberg]

Op 19-05-2024 om 15:59 schreef G. Branden Robinson:
>     typeahead
>       curses does “line‐breakout optimization” by looking for typeahead
>       periodically while updating the screen.  If input is found, and it
>       is coming from a terminal, the current update is postponed until
>       refresh(3NCURSES) or doupdate is called again.  This allows faster
>       response to commands typed in advance.  Normally, the input FILE
>       pointer passed to newterm, or stdin in the case that initscr was
>       used, will be used to do this typeahead checking.  The typeahead
>       routine specifies that the file descriptor fd is to be used to
>       check for typeahead instead.  If fd is -1, then no typeahead
>       checking is done.

Does this mean that ncurses does this typeahead checking by default,
and that one needs to call typeahead(-1) to switch it off?

Isn't that weird?  What if the typeahead keystroke is one that doesn't
result in another call of doupdate()?


Benno

OpenPGP_signature.asc
Description: OpenPGP digital signature