[f2py] f2py, C, and multidimensional arrays.

[Pearu Peterson]

Daniel Welling wrote:
> Greetings.  I am new to F2py and am trying to use it to wrap some simple 
> C functions.  I've had success with scalars and vectors, but cannot get 
> any multidimensional arrays to work correctly.  An example:
> 
> /* bar.c */
> void bar(int n, int m, double **x) {
                                 ^-- f2py cannot wrap C functions
that have pointer to pointers arguments. A rule of thumb is that
f2py can wrap C functions that can be called from Fortran. This
example is not such a function. Try wrapping the following
example with the same m.pyf file:

void bar(int n, int m, double *x)
{
   int i, j;
   for (i=0; i<n; i++)
     for (j=0; j<m; j++)
       printf("Position %i, %i = %.3f\n", i, j, (x+i*m)[j]);
}

Pearu