Date: Wed, 13 Feb 2008 12:35:10 -0800 From: Marcel Moolenaar <xcllnt@mac.com> To: rick-freebsd@kiwi-computer.com Cc: Ed Schouten <ed@fxq.nl>, FreeBSD Arch <freebsd-arch@freebsd.org> Subject: Re: Proposal for redesigning the TTY layer Message-ID: <840B6A4A-3F3C-477A-A667-086ABFCE8BF6@mac.com> In-Reply-To: <20080213195531.GA93104@keira.kiwi-computer.com> References: <20080213150500.GH1340@hoeg.nl> <A86365DD-5D15-42F2-A810-493B9F9E7AA3@mac.com> <20080213192808.GL1340@hoeg.nl> <2672DC03-9293-4A92-969B-074CAB55176B@mac.com> <20080213195531.GA93104@keira.kiwi-computer.com>
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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@mac.com
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