Re: [Vala] Help about write vapi file with c libray

[Matrix <pigex zhang gmail com>]

在 2014/9/26 22:54, Andre Masella 写道:
> Since it can be null if the open fails, it would be best as “out Port?
> port”.
>
> On 26 September 2014 10:48, Luca Bruno <lethalman88 gmail com> wrote:
>
> > On 26/09/2014 16:44, Matrix wrote:
> > > 在 2014/9/26 22:19, Luca Bruno 写道:
> > > > On 26/09/2014 16:09, Matrix wrote:
> > > > > Hi:
> > > > >
> > > > > I'm try using Vala to write a GUI serialport tool with libserialport.
> > > > >
> > > > > I have already have a demo with pure c implenmention.
> > > > >
> > > > > I'm still working with write vapi file to this lib follow the tutorial
> > > > > at https://wiki.gnome.org/Projects/Vala/LegacyBindings
> > > > >
> > > > > but the c struct is init by this form:
> > > > >
> > > > > enum sp_return sp_get_port_by_name(const char *portname, struct
> > > > > sp_port **port_ptr);
> > > > >
> > > > > how do i to write for such form ?
> > > > class Port {
> > > >     [CCode (cname = "sp_get_port_by_name")]
> > > >     static Return get_port_by_name (string portname, out Port);
> > > > }
> > > >
> > > > Then:
> > > >
> > > > Port port;
> > > > Port.get_port_by_name ("foo", out port);
> > > > _______________________________________________
> > > > vala-list mailing list
> > > > vala-list gnome org
> > > > https://mail.gnome.org/mailman/listinfo/vala-list
> > > Thank you, Luca Bruno!
> > >
> > > I follow your help, but have error....
> > >
> > > there is my vapi file snippet:
> > >
> > > /*************************************************
> > > using GLib;
> > >
> > > namespace SerialPort {
> > >      [CCode (cname = "int", cprefix = "SP_", has_type_id = "false")]
> > >      public enum Return {
> > >          OK,
> > >          ERR_ARG,
> > >          ERR_FAIL,
> > >          ERR_MEM,
> > >          ERR_SUPP
> > >      }
> > >
> > >      [CCode (cname = "struct sp_port", has_type_id = "false")]
> > >      public class Port {
> > >          [CCode (cname = "sp_get_port_by_name", has_type_id = "false")]
> > >          static Return get_port_by_name(string name, out Port);
> > >      }
> > > }
> > > /***************************************************
> > >
> > > $ valac -C auto_test.vala --pkg libserialport
> > > Compilation failed: 1 error(s), 0 warning(s)
> > > libserialport.vapi:16.61-16.61: error: syntax error, expected identifier
> > >          static Return open_get_by_name(string name, out Port);
> > Of course, out Port port :)
> > _______________________________________________
> > vala-list mailing list
> > vala-list gnome org
> > https://mail.gnome.org/mailman/listinfo/vala-list
Great! Thanks you two, it's OK now!!

Best Regards!