Re: Proposal for redesigning the TTY layer


On Feb 13, 2008, at 11:55 AM, Rick C. Petty wrote:

On Wed, Feb 13, 2008 at 11:36:56AM -0800, Marcel Moolenaar wrote:

I personnally think we shouldn't put multibyte-handling inside the
clists, but within the drivers, like syscons.

The problem with doing it that way is that insertion of control
characters, like XON/XOFF or STOP may happen right in the middle
of UTF-8 sequences. This may be problematic...

Technically this shouldn't be a problem, because all subsequent UTF-8 bytes
have bit 7 set and bit 6 cleared and XON/XOFF are 7-bit clean, so it should
be pretty obvious that the handshaking happens in the middle of a multibyte
sequence.

Maybe so, but it wouldn't be a surprise to me that such is
unexpected by UTF-8 parsers and could cause problems, such
as the printing of error glyphs...

--
Marcel Moolenaar
xcllnt@xxxxxxx


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