interfaces.C - Import struct

interfaces.C - Import struct

[Jean-Baptiste CAMPESATO]

Hello;
In a C Header file i've got this struct :
    typedef struct {
        void (*driver_setpixel_func) (int, int, int);
        int (*driver_getpixel_func) (int, int);
        void (*driver_hline_func) (int, int, int, int);
        void (*driver_fillbox_func) (int, int, int, int, int);
        void (*driver_putbox_func) (int, int, int, int, void *, int);
        void (*driver_getbox_func) (int, int, int, int, void *, int);
        void (*driver_putboxmask_func) (int, int, int, int, void *);
        void (*driver_putboxpart_func) (int, int, int, int, int, int, void *,
                                        int, int);
        void (*driver_getboxpart_func) (int, int, int, int, int, int, void *,
                                        int, int);
        void (*driver_copybox_func) (int, int, int, int, int, int);
    } framebufferfunctions;

And with the package interfaces.C i wan't to import this structure as
"type framebufferfunctions is record" but i don't know the equivalent of a
pointer for a function in Ada, and if i must import all the possible
function.
And c2ada doesn't work under SlackwareLinux 10.1, Debian Sarge, Fedora2.
I've a lot of error when i compile.
Somebody can help please ? (use c2ada on vgagl.h or explicate me how
translat this struct)
Thanks

Re: interfaces.C - Import struct

[Martin Krischik]

Jean-Baptiste CAMPESATO wrote:

> Hello;
> In a C Header file i've got this struct :
>     typedef struct {
>         void (*driver_setpixel_func) (int, int, int);

type driver_setpixel_type
is access procedure (
   A : Interfaces.C.int;
   B  : Interfaces.C.int;
   C : Interfaces.C.int);

pragma Convetion (C, driver_setpixel_type);

>         int (*driver_getpixel_func) (int, int);
>         void (*driver_hline_func) (int, int, int, int);
>         void (*driver_fillbox_func) (int, int, int, int, int);
>         void (*driver_putbox_func) (int, int, int, int, void *, int);
>         void (*driver_getbox_func) (int, int, int, int, void *, int);
>         void (*driver_putboxmask_func) (int, int, int, int, void *);
>         void (*driver_putboxpart_func) (int, int, int, int, int, int, void
>         *,
>                                         int, int);
>         void (*driver_getboxpart_func) (int, int, int, int, int, int, void
>         *,
>                                         int, int);
>         void (*driver_copybox_func) (int, int, int, int, int, int);
>     } framebufferfunctions;
> 
> And with the package interfaces.C i wan't to import this structure as
> "type framebufferfunctions is record" but i don't know the equivalent of a
> pointer for a function in Ada, and if i must import all the possible
> function.
> And c2ada doesn't work under SlackwareLinux 10.1, Debian Sarge, Fedora2.
> I've a lot of error when i compile.
> Somebody can help please ? (use c2ada on vgagl.h or explicate me how
> translat this struct)

You will need to define access to procedure type for each produre - as shown
above. And you don't need to import the functions.

With Regards

Martin

BTW: do you know about:

typedef void driver_setpixel_type (int, int, int);

Looks much nicer then the (*xxxx) stuff - It is also easer to type: just
copy the original prototype and replace extern/static with typedef - done.
And the code would become symetic to the Ada code making maintance easier.

-- 
mailto://krischik@users.sourceforge.net
Ada programming at: http://ada.krischik.com

Re: interfaces.C - Import struct

[Jean-Baptiste CAMPESATO]

Le Sun, 13 Mar 2005 10:05:35 +0100, Martin Krischik a ￜcritￜ:

> Jean-Baptiste CAMPESATO wrote:
> 
>> Hello;
>> In a C Header file i've got this struct :
>>     typedef struct {
>>         void (*driver_setpixel_func) (int, int, int);
> 
> type driver_setpixel_type
> is access procedure (
>    A : Interfaces.C.int;
>    B  : Interfaces.C.int;
>    C : Interfaces.C.int);
> 
> pragma Convetion (C, driver_setpixel_type);
> 
>>         int (*driver_getpixel_func) (int, int);
>>         void (*driver_hline_func) (int, int, int, int);
>>         void (*driver_fillbox_func) (int, int, int, int, int);
>>         void (*driver_putbox_func) (int, int, int, int, void *, int);
>>         void (*driver_getbox_func) (int, int, int, int, void *, int);
>>         void (*driver_putboxmask_func) (int, int, int, int, void *);
>>         void (*driver_putboxpart_func) (int, int, int, int, int, int, void
>>         *,
>>                                         int, int);
>>         void (*driver_getboxpart_func) (int, int, int, int, int, int, void
>>         *,
>>                                         int, int);
>>         void (*driver_copybox_func) (int, int, int, int, int, int);
>>     } framebufferfunctions;
>> 
>> And with the package interfaces.C i wan't to import this structure as
>> "type framebufferfunctions is record" but i don't know the equivalent of a
>> pointer for a function in Ada, and if i must import all the possible
>> function.
>> And c2ada doesn't work under SlackwareLinux 10.1, Debian Sarge, Fedora2.
>> I've a lot of error when i compile.
>> Somebody can help please ? (use c2ada on vgagl.h or explicate me how
>> translat this struct)
> 
> You will need to define access to procedure type for each produre - as shown
> above. And you don't need to import the functions.
> 
> With Regards
> 
> Martin
> 
> BTW: do you know about:
> 
> typedef void driver_setpixel_type (int, int, int);
> 
> Looks much nicer then the (*xxxx) stuff - It is also easer to type: just
> copy the original prototype and replace extern/static with typedef - done.
> And the code would become symetic to the Ada code making maintance easier.

Thanks a looot :)

Re: interfaces.C - Import struct

[Simon Wright]

Martin Krischik <martin@krischik.com> writes:

> BTW: do you know about:
> 
> typedef void driver_setpixel_type (int, int, int);
> 
> Looks much nicer then the (*xxxx) stuff - It is also easer to type:
> just copy the original prototype and replace extern/static with
> typedef - done.  And the code would become symetic to the Ada code
> making maintance easier.

Thanks a lot for that!

Personally I would go for

  typedef void driver_setpixel_type (int a, int b, int c);

being a believer in descriptive names for parameters ... of course I
would never actually use a, b, c, that's obviously silly.

-- 
Simon Wright                               100% Ada, no bugs.

Re: interfaces.C - Import struct

[Martin Krischik]

Simon Wright wrote:

> Martin Krischik <martin@krischik.com> writes:
> 
>> BTW: do you know about:
>> 
>> typedef void driver_setpixel_type (int, int, int);
>> 
>> Looks much nicer then the (*xxxx) stuff - It is also easer to type:
>> just copy the original prototype and replace extern/static with
>> typedef - done.  And the code would become symetic to the Ada code
>> making maintance easier.
> 
> Thanks a lot for that!
> 
> Personally I would go for
> 
>   typedef void driver_setpixel_type (int a, int b, int c);
> 
> being a believer in descriptive names for parameters ... of course I
> would never actually use a, b, c, that's obviously silly.

Me too, in this case I just copied the example from the OP.

Martin
-- 
mailto://krischik@users.sourceforge.net
Ada programming at: http://ada.krischik.com