Re: [Vala] How to properly define struct in manually written VAPI?

["marcin saepia net" <marcin saepia net>]

It was long time ago, indeed:
https://bugzilla.gnome.org/show_bug.cgi?id=651271

Wow, how fast the time passes.

Ok, maybe I will give it another try :)

m.

2016-03-02 17:59 GMT+01:00 Ben Iofel <iofelben gmail com>:

> If you can make it segfault, please file a bug or at least post the code
> here
>
>
> On Wed, Mar 2, 2016, 11:09 AM marcin saepia net <marcin saepia net> wrote:
>
> > Hello,
> >
> > thank you for suggestions. I'll try to implement them.
> >
> > But should I keep it as struct or rather compact class?
> >
> > Regarding json-glib: I intentionally try to avoid it. I was able to make
> > segfault even with a few simple attempts that should be tested in properly
> > written library, I don't need mapping for GObject properties, and I think I
> > encountered also some issues with big integers, I don't remember now. In my
> > use case more low level, better-tested library will a be better choice.
> >
> > m.
> >
> > 2016-03-02 15:28 GMT+01:00 Ben <iofelben gmail com>:
> >
> > > FYI, Vala already has binding for json-glib
> > > http://valadoc.org/#!api=json-glib-1.0/Json
> > > It has nice features like deserialization with GObject properties
> > >
> > > On Wed, Mar 2, 2016 at 5:19 AM, marcin saepia net <marcin saepia net>
> > > wrote:
> > >
> > > Hello, I need to write VAPI for jansson JSON library. I have already
> > > started ( https://github.com/akheron/jansson/pull/273) and generally
> > > speaking it works fine but I have an issue with covering one struct. In C
> > > code there's the following struct: #define JSON_ERROR_TEXT_LENGTH 160
> > > #define JSON_ERROR_SOURCE_LENGTH 80 typedef struct { int line; int column;
> > > int position; char source[JSON_ERROR_SOURCE_LENGTH]; char
> > > text[JSON_ERROR_TEXT_LENGTH]; } json_error_t; it is an output parameter to
> > > function that should have the following syntax in Vala: loads(string input,
> > > LoadFlags flags, out Error error) I struggle to properly define it in VAPI.
> > > When I define it like this: [CCode (cname = "json_error_t", has_type_id =
> > > false)] public struct Error { public string text; public string source;
> > > public int line; public int column; public size_t position; } it complains
> > > about missing copy function during C compilation phase when I add [CCode
> > > (cname = "json_error_t", has_copy_function = false, has_type_id = false)]
> > > public struct Error { public string text; public string source; public int
> > > line; public int column; public size_t position; } it then throws
> > > api/auth/oauth2.c:939:2: error: array type 'char [160]' is not assignable
> > > _g_free0 ((*dest).text); ^ ~~~~~~~~~~~~ api/auth/oauth2.c:51:28: note:
> > > expanded from macro '_g_free0' api/auth/oauth2.c:940:15: error: array type
> > > 'char [160]' is not assignable (*dest).text = _tmp1_; ~~~~~~~~~~~~ ^
> > > api/auth/oauth2.c:943:2: error: array type 'char [80]' is not assignable
> > > _g_free0 ((*dest).source); ^ ~~~~~~~~~~~~~~ How to define it properly?
> > > Underlying API does not provide any destroy/copy functions. I also tried to
> > > convert it to the compact class but then Vala Compiler creates
> > > pointer-to-pointer for underlying C code for the parameter which is
> > > improper. Thanks, Marcin _______________________________________________
> > > vala-list mailing list vala-list gnome org
> > > https://mail.gnome.org/mailman/listinfo/vala-list