Re: [pure-lang-users] C macros

[Eddie R. <er...@bm...>]

On Sat 30/08/08  4:37 PM , Albert Graef Dr....@t-... sent:
> Eddie Rucker wrote:
> > Um... Is there some way from Pure to find out
> the byte sizeof ints,> doubles, complex, etc? When the sizes change on
> different machines> and/or compilers I'd like the library to
> automatically handle this.
> FWIW, system.pure now provides the following constants. These probably 
> aren't of much use for figuring out struct alignment, but at least they
> provide the necessary information to malloc pointers to these types in a
> portable manner. Also, you can test whether you're on a 64 bit system by
> inspecting SIZEOF_POINTER. (BTW, I see no point in adding the long 
> double types right now, since these aren't supported by Pure in any
> way.)

Thanks!

> Is it true that complex double is just two doubles, similar for complex
> float? That would make things much easier, because a complex matrix 
> could be represented internally as a double matrix with twice the number
> of columns. I guess that ISO C99 implementations are free to choose the
> internal representation, though.

Complex is indeed two doubles. I don't have the docs in front of me but I think it was defined double z[2];

e.r.