Re: Interfacing with C

[Maciej Sobczak <see.my.homepage@gmail.com>]

On 18 Maj, 13:29, cedric <c.lann...@web.de> wrote:

> The h-file of the api contains the following pre-processor commands:
>
> #ifdef SPSSXD_EXPORTS
> # define SPSSXD_API __declspec(dllexport)
> #else
> # if MS_WINDOWS
> #   define SPSSXD_API __declspec(dllimport)
> # else
> #   define SPSSXD_API
> # endif
> #endif
>
> Some functions headers are
>
> SPSSXD_API bool IsBackendReady();
> SPSSXD_API int SetUpFromSPSS(SpssAdapter* anAdapter, SpssXDSmb*
> anSmb);
>
> What do I have to do to get a connection between the C functions and
> my Ada program with regard to the commands of the pre-processor?

Nothing, just ignore it. This crap is needed for a Visual C++ compiler
which is unable to create a proper DLL otherwise (note that it has
nothing to do with C++ as the programming language).
Once this library is built, you should be able to interface with it
from Ada as if the preprocessor magic did not exist:

bool IsBackendReady();
int SetUpFromSPSS(SpssAdapter* anAdapter, SpssXDSmb* anSmb);

Still, apart from importing the properly declared subprograms, you
need to provide some special flag to the linker so that it can take
this library into account.

--
Maciej Sobczak * www.msobczak.com * www.inspirel.com

Database Access Library for Ada: www.inspirel.com/soci-ada