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Using X11 lib in D

 
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Insomniak



Joined: 01 Sep 2007
Posts: 16
PostPosted: Wed Jan 16, 2008 8:25 am    Post subject: Using X11 lib in D Reply with quote
Hi Smile

I'm needing help about how to use X11 lib in D...

I saw in documentation that we can import C functions... But X11 is a bit too complicated, a lot of X11 functions are macros, who are macros of macros, who are macros calling functions...

I don't know how to port the "drawable" thing in D too...

Do i have to write structs like "Display" [they are only pointers...]... ?

Just this :

Code:
extern(C)
{
    struct Dislay;
    XQueryExtension(Display *display, char *name, int *major_opcode_return, int *first_event_return, int *first_error_return);
}


or this... ?

Code:
extern(C)
{
    struct Dislay
    {
         ... all members of Display struct
    }
    XQueryExtension(Display *display, char *name, int *major_opcode_return, int *first_event_return, int *first_error_return);
}


So, you understand, i need your help... Smile

(sorry for my bad english... :/)

Thanks in advance.
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miasma



Joined: 08 Feb 2007
Posts: 13
PostPosted: Tue Jan 22, 2008 6:35 pm    Post subject: Re: Using X11 lib in D Reply with quote
Insomniak wrote:
Hi Smile

I'm needing help about how to use X11 lib in D...

I saw in documentation that we can import C functions... But X11 is a bit too complicated, a lot of X11 functions are macros, who are macros of macros, who are macros calling functions...

I don't know how to port the "drawable" thing in D too...

Do i have to write structs like "Display" [they are only pointers...]... ?

Just this :

Code:
extern(C)
{
    struct Dislay;
    XQueryExtension(Display *display, char *name, int *major_opcode_return, int *first_event_return, int *first_error_return);
}


or this... ?

Code:
extern(C)
{
    struct Dislay
    {
         ... all members of Display struct
    }
    XQueryExtension(Display *display, char *name, int *major_opcode_return, int *first_event_return, int *first_error_return);
}


So, you understand, i need your help... Smile

(sorry for my bad english... :/)

Thanks in advance.


All C preprocessor macros can't be used directly. You need to either rewrite the macros in D (e.g. string mixins) or use wrapper functions.

I think if only pointers to structs are handled in D code, a simple pointer type suffices, but if you need to also access fields, the latter extern(C) block is needed.
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