Felipe Lessa wrote: > Hi, > > I tried googling and searching the haskellwiki about this but wasn't > lucky enough. My question is: is there a way to send struct arguments > to C functions via the FFI or do I need to create a C wrapper? I guess > there isn't, and while I can live without it, I'd like to leave no > doubt.
You might find this old post of mine useful. http://therning.org/magnus/archives/315 > > > Details: > > I have something like > > ==================== > typedef struct vect { > float x,y; > } vect; > > void func(vect v); > ===================== > > on the C side and > > ==================== > -- Please disregard float /= Float, just an example :) > data Vector = Vector Float Float > > instance Storable Vector where > ... > ==================== > > on the Haskell side, and I want to call func with Vector as argument. > Now, Vector isn't a basic FFI type, although it implements Storable. > So does that mean that I need to create something like > > ==================== > void funcWrapper(vect *v) { > func(*v); > } > ==================== > > and then allocate some temporary memory on the Haskell side to use func? > > Cheers! > -- Magnus Therning (OpenPGP: 0xAB4DFBA4) magnus＠therning．org Jabber: magnus＠therning．org http://therning.org/magnus Haskell is an even 'redder' pill than Lisp or Scheme. -- PaulPotts
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