If you need the pointers to each lower-dimensional slice, you should be
able to build it like so (warning: untested):
```
sz = size(A)[2:end] # if you need type-stability, use Base.tail(size(A))
instead
Aptrs = Array{Ptr{eltype(A)}(sz)
for I in CartesianRange(sz)
Aptrs[I] = pointer(A, sub2ind(size(A), 1, I.I...))
end
```
and then pass Aptrs to your C function.
Note that A must be an Array (not a generic AbstractArray) for this to work.
Best,
--Tim
On Fri, Nov 4, 2016 at 9:05 AM, Yichao Yu <yyc1...@gmail.com> wrote:
> On Fri, Nov 4, 2016 at 9:22 AM, Alexander Lyapin
> <lyapinaalexan...@gmail.com> wrote:
> > There is a topic:
> > https://groups.google.com/d/msg/julia-users/EK9oNzzaoAk/kJqagPL0Ku0J
> >
> > However could some one give an example how to pass 3-d or 4-d array to C
> > function.
> >
> > I have Array{Float64, 4} and for ccall I use Ptr{Ptr{Ptr{Ptr{Float64}}}}
> as
> > Type of parameter. Is there some way to make it more common for
> > Array{Float64, N}??? Thank you
>
> No matter what the dimension is,it's always a `Ptr{eltype(array)}` in
> C (`Ptr{Float64}` in thiscase) and since it's just a normalpointer,
> you always need topass the dimensions explicitlyto C in another
> argumetns.
>
