On Fri, Sep 20, 2013 at 6:53 PM, Miro Karpis
Please, I just can not figure this out:
I have a method in my C dll: int somemethod(char *param, int length, double array[], int UB1, int UB2, bool isValid);
I would like to use this method in Haskell, so I have defined it like:
foreign import stdcall unsafe "somemethod" c_somemethod :: Ptr CString
You don't want Ptr CString. See: Prelude> :m +Foreign.C.String Prelude Foreign.C.String> :i CString type CString = GHC.Ptr.Ptr Foreign.C.Types.CChar -- Defined in `Foreign.C.String' In other words, CString is an alias for Ptr CChar. Ptr CString corresponds to (char **), not (char *). -- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net