OpenEuphoria

Re: Sequence-Atom-DLL

• Posted by Robert Craig <rds at RapidEuphoria.com> Jun 02, 2003
• 391 views

president at insight-concepts.com wrote:
> I have been practicing creating and using .DLLs with Euphoria and the C 
> Translator.
> 
> I created a small .dll with a procedure File_Compress(sequence infile, 
> sequence outfile, 
> sequence setting)
> 
> When trying to call the procedure from a test application, I get an 
> error "Fatal run-time error: device or file name must be a sequence"
> 
> I tried changing the data to a sequence and then I received and error 
> that arguments to C routines must be atoms.

When calling a .dll routine that's written in Euphoria,
you can pass any kind of Euphoria data as arguments to
the routine, but you must declare the routine using
define_c_proc/func and the E_ types (E_INTEGER, E_ATOM, ...),
not the C_ types (C_INT, ...).
e.g.
      fc = define_c_proc(lib, "File_Compress",
                         {E_SEQUENCE, E_SEQUENCE, E_SEQUENCE})

      c_proc(fc, {"infile.dat", "outfile.dat", {1,2,3}})


Regards,
    Rob Craig
    Rapid Deployment Software
    http://www.RapidEuphoria.com