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

[Matrix <pigex zhang gmail com>]

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);
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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);