Re: [Swig-user] conversion wrappers for Lisp code

[Tamas P. <tk...@gm...>]

Hi Surendra,

Then maybe I am doing something wrong:

(cairo_line_to *cr* 0 100)

gives

Type-error in KERNEL::OBJECT-NOT-DOUBLE-FLOAT-ERROR-HANDLER:
   0 is not of type DOUBLE-FLOAT
   [Condition of type TYPE-ERROR]

Restarts:
  0: [ABORT-REQUEST] Abort handling SLIME request.
  1: [ABORT] Return to Top-Level.

Backtrace:
  0: ("LAMBDA (G3550 G3551 G3552 G3553)" #<Alien (FUNCTION (VALUES)
SYSTEM:SYSTEM-AREA-POINTER DOUBLE-FLOAT DOUBLE-FLOAT) at #x58000668>
#.(SYSTEM:INT-SAP #x08087F98) 0 100)
  1: (CAIRO_LINE_TO #.(SYSTEM:INT-SAP #x08087F98) 0 100)
  2: ("DEFSLIMEFUN INTERACTIVE-EVAL")

where cairo_line_to is generated by SWIG as

(cffi:defcfun ("cairo_line_to" cairo_line_to) :void
  (cr :pointer)
  (x :double)
  (y :double))

How can I enable the automatic conversion you mentioned?

Thanks,

Tamas

On 5/13/07, Surendra Singhi <efu...@ne...> wrote:
>
> Hi,
>
> "Tamas Papp" <tk...@gm...> writes:
>
> > The Lisp (CFFI) interface generated for C functions expects the same
> numeric
> > type as the original function (double-float, etc).  It is possible to
> > automatically generate wrappers for these functions so that they would
> > accept any numeric type and convert the numbers to the desired format?
>
> You will have to write your own wrappers for any conversion beyond what
> lisp
> and cffi does. Lisp should automatically convert, say integer to floats.
>
> Cheers,
> -Surendra
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> _______________________________________________
> Swig-user mailing list
> Swi...@li...
> https://lists.sourceforge.net/lists/listinfo/swig-user
>