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Re: about keycodes

From: Thomas Dickey
Subject: Re: about keycodes
Date: Tue, 29 May 2007 08:29:45 -0400 (EDT)

On Tue, 29 May 2007, chinlu chinawa wrote:

I've been trying to find out how does curses do so the
keystroke-getting mechanism bypasses endianness

curses reads a stream of characters (and there should be no endianess
or byte-ordering issues in that).

I've been trying to make some sense out of this, for
example perhaps values on the fifo were summed, and/or
then (un)mettaed ((x) & (~0x80)), or (un)controlled as
keycodes seem to start over 256 decimal (MIN_KEY 0401)
have tried different things, though I don't seem to
get how it "magically" knows the keypress was

It's matching strings - they're stored in a tree to make the matching
somewhat more efficient than a list.  As soon as it finds a match,
curses returns the corresponding keycode.

Thomas E. Dickey

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