On Fri, 8 Apr 2011 15:43:17 -0700 Igor Korot <ikorot01@xxxxxxxxx> wrote: > Paul, > > On Fri, Apr 8, 2011 at 3:28 PM, Paul Davis > <paul@xxxxxxxxxxxxxxxxxxxxx> wrote: > > On Fri, Apr 8, 2011 at 6:14 PM, Igor Korot <ikorot01@xxxxxxxxx> > > wrote: > >> Mikhail, > >> > >> On Fri, Apr 8, 2011 at 2:33 PM, Mikhail Titov <mlt@xxxxxx> wrote: > >>> As far as I understand it is possible to use it with NULL for > >>> encoding. It should just read bytes with no interpretation. > >>> > >>> http://www.mail-archive.com/gtk-list@xxxxxxxxx/msg29589.html > >>> > >>> Mikhail > >> > >> I understand this. > >> However, what I want is to read data in: > >> > >> struct Data > >> { > >> Â Â Âchar m_header[2]; > >> Â Â Âchar m_code; > >> Â Â Âchar m_voltageMask[2]; > >> Â Â char m_highestVoltage[2]; > >> Â Â char m_lowestVoltage[2]; > >> Â Â char m_status; > >> } m_data; > >> > >> I need to look at voltageMask, highestVoltage and lowestVoltage > >> initially. Is it possible to use m_data with GIOChannel? > > > > of course. > > > > but you'd better hope that the compiler packs that data structure in > > the same way the device is sending it. you'd be far better off not > > using a struct for this, but just reading (in your case) 10 bytes. > > > > sending raw C structs over any kind of "wire protocol" almost always > > turns out to be huge mistake unless its been very carefully thought > > about. > > > So best way is to use char m_data[10]? Why do you have this idea you need to use an aggregate, which then causes packing and layout issues to arise, leading to non-portability. Why not send them as individual entities, since you are guaranteed that they will be serialised? (I am not saying that you don't have a reason, but you have not given it.) Chris _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
