[Swig-user] Geting the dimensions of 2D arrays in typemap(Ruby)

[Byerley <reg...@ho...>]

Hi, I'm trying to pass 2D array from Ruby to a C++ function.

For 1D array of some class Cls, I wrote a typemap:

%typemap(in) Cls *arr {
	int size = RARRAY_LEN($input);
	$1 = (Cls *)malloc(sizeof(Cls) * size);
	for (int i = 0; i < size; i++) {
		VALUE rb_obj = rb_ary_entry($input, i);
		Cls *cpp_obj = NULL;
		Data_Get_Struct(rb_obj, Cls, cpp_obj);
		$1[i] = *cpp_obj;
	}
}

And it was successful.
So, for 2D arrays, I wrote,

%typemap(in) Cls **arr {
	int rowSize = RARRAY_LEN($input);
	int colSize = RARRAY_LEN($input[0]);
	...
}

However, the swig gave me the error message, saying
"invalid types ‘long unsigned int[int]’ for array subscript"
I looks like that $input[0] has some problem.

How should I fix my code so that I can get the size of 2D array?



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