On Fri, 29 May 2009 10:51:14 +0200 Pierre Ossman <oss...@cendio.se> wrote:
> > Has anyone done a survey of how implementations treat this extension > and the name field in the server init? If there are no existing > implementations that prevent it, then I'd like to specify UTF-8 for at > least the extension. > I've been digging through the RealVNC source and string handling is just a complete clusterfuck. The implementation uses the all too familiar approach of sticking one's head in the sand and hoping that all encoding issues will just sort themselves out. This is the reality of things: 1. Unix server Uses whatever encoding the parameters are in when invoking Xvnc or vncconfig. Since most Linux distributions these days use UTF-8, so the desktop name will in turn mostly be UTF-8. 2. Windows server Uses the ACP (Active Code Page). Can really be a lot of things, though most often cp1252 (almost 8859-1) in the west. 3. Unix client Passes the string unmodified to XSetName(). Looking at the xlib reference documentation, this uses "Host Portable Character Encoding" which in turn uses a lot of weasel wording and doesn't really define that much at all. Looking at the ICCCM though and how xlib implementations behave in practice, this encoding is 8859-1. IOW, the Unix client assumes the name is in 8859-1. 4. Window client Like the Windows server, it assumes that things are in ACP. So to summarise, the only part that has some idea of what encoding it wants is the Unix client. Everything else is basically random and dependent on the system settings. ASCII should be fairly safe to use, but I'm not 100% sure of even that. Given that most of the systems (except for the Unix server) have been using 8859-1 (or cp1252, which is close) in practice, I'd say we define the desktop name to be 8859-1 and nothing else. Rgds -- Pierre Ossman OpenSource-based Thin Client Technology System Developer Telephone: +46-13-21 46 00 Cendio AB Web: http://www.cendio.com
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