[Haskell-beginners] FFI and opac struct

[PICCA Frederic-Emmanuel]

I found the error

[HklFactory 0xb7772920,HklFactory 0xb7772a6c,HklFactory 0xb7772a98,HklFactory 0xb7772ac4,HklFactory 0xb7772bf8,HklFactory 0xb7772ef8,HklFactory 0xb77734f0,HklFactory 0xb7773524,HklFactory 0xb77736c0,HklFactory 0xb7773784,HklFactory 0xb77738a8,HklFactory 0xb77738dc,HklFactory 0xb7773908,HklFactory 0xb77739cc]
["TwoC","E4CH","SOLEIL MARS","E4CV","K4CV","E6C","SOLEIL SIRIUS KAPPA","K6C","PETRA3 P09 EH2","SOLEIL SIRIUS TURRET","SOLEIL SIXS MED2+3","SOLEIL SIXS MED1+2","SOLEIL SIXS MED2+2","ZAXIS"]

the signature of the C methode was wrong

Ptr HklFactory -> HklFactory

foreign import ccall unsafe "hkl.h hkl_factory_name_get"
  c_hkl_factory_name_get :: HklFactory
                         -> IO CString

thanks for your help ;)