using sizeof information in SML

I ran across the following in my code :

     let val size = (C.T.sizeof T_fftw_complex.typ)
         (* really, really should not use *16 as this implicitly
         assumes that the sizeof(double) = 8.  Eventually sizeof should
         be used. *)
         val ptr = F_fftw_malloc.f(Int32.fromInt(n*16))

The problem of course is that I should be using n*size

I can't seem to figure out what the type of size is, so I can't turn  
it into an Int32 by applying the appropriate transmogrification.

The type in the error message if I just try size*n is :

T_fftw_complex.t ?.C.size

Which I can't make sense of.

I'm thinking there's just gotta be a built-in function in nlffi which  
can take a blah-blah-size and turn it into an integer for you, right ?


Brian


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