Hi all!
Question:
I have a Lisp function as follows:
(defun frgo (fmt &rest args) (format t fmt args))
Now I want to define a C call back for that function:
(defcallback frgoc :void ((fmt :string) (args ???????
How do I define the callback such that I can have a C function with varargs being defined?
Thx!
Cheers Frank
On Fri, Dec 2, 2011 at 5:36 PM, Frank Goenninger frgo@me.com wrote:
(defun frgo (fmt &rest args) (format t fmt args))
Now I want to define a C call back for that function:
(defcallback frgoc :void ((fmt :string) (args ???????
How do I define the callback such that I can have a C function with varargs being defined?
Sorry, no way to do that right now. Last time I checked, no Lisp's got support for such a feature. We might start using libffi to add extra (low-level) features in the near feature, but not even libffi supports this particular feature.
Am 02.12.2011 um 19:46 schrieb Luís Oliveira:
On Fri, Dec 2, 2011 at 5:36 PM, Frank Goenninger frgo@me.com wrote:
(defun frgo (fmt &rest args) (format t fmt args))
Now I want to define a C call back for that function:
(defcallback frgoc :void ((fmt :string) (args ???????
How do I define the callback such that I can have a C function with varargs being defined?
Sorry, no way to do that right now. Last time I checked, no Lisp's got support for such a feature. We might start using libffi to add extra (low-level) features in the near feature, but not even libffi supports this particular feature.
Understood. So I 'm back to square 1 with just a pointer to a struct that I have to de-structure myself. Not beautiful but ok. Thanks for the quick help.
Cheers Frank
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Frank Goenninger -
Luís Oliveira