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The following reply was made to PR pkg/37173; it has been noted by GNATS.
From: "Valeriy E. Ushakov" <uwe%stderr.spb.ru@localhost>
Subject: Re: pkg/37173
Date: Sat, 17 Nov 2007 02:56:27 +0300
Suggested hack makes keypad keys (arrows &co) in tin work for me again.
Our curses has no chance of working with tin, b/c tin does something
in it's curses code that is not strictly legal. In tcurses.c:ReadCh
it does ungetch() on KEY_* values while our curses doesn't support
that (as per SUS). To quote the SUS (emphasis mine):
The ungetch() function pushes the SINGLE-BYTE character ch onto the
head of the input queue.
and KEY_* values are from 0x100 up, i.e. not single-byte. So later,
when get_arrow_key calls getch() again it receives truncated value
(KEY_* & 0xff) instead of the KEY_* value.
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