Hi,

> I am trying to call a c function with an argument passed by address.
> Reading the documentation in
> file:/usr/local/acl5/doc/cl/foreign_functions.htm#5.1,
> Modifying arguments called by address: use arrays
> I found the example:
> 
> (ff:def-foreign-call `itimes2 ((simple-array fixnum (1)))
>             :convention :fortran :returning :void)
> 
> However, changing the obvious mistakes to:
> 
> (ff:def-foreign-call itimes2 ((dice (simple-array fixnum (1))))
>             :convention :c  :returning :void)
> 
> I get the error:
> 
> Error: don't know how to convert type: (SIMPLE-ARRAY FIXNUM (1))
>   [condition type: SIMPLE-ERROR]
IMO the given example has more mistakes than the ones you already
detected. I think it should look like this (although I didnt test it):

(ff:def-foreign-call itimes2 
                     ((dice                      ;;; Name of the
Argument
                      (* :unsigned-byte)         ;;; The foreign
argument is a 
                                                 ;;; pointer to some
numbers
                      (simple-array fixnum (1))) ;;; which should be
converted to the
                                                 ;;; LISP type
simple-array of fixnum
                     )
                     :convention :c :returning :void)

Hope that helps
	Joe

-- 
Johannes Beck   beck at informatik.uni-wuerzburg.de
                
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