How to define the <SHAPE> of an array with variable size in a c++ clib function?

Hi,

I am trying to build a c++ clib.

After running:

clibgen.generateLibraryDefinition(...)

I get a definemylib.mlx.

There I have to define the shape of the function input:

defineArgument(mycppfunctionDefinition, "myarray", "clib.array.mylib.Double", "input", <SHAPE>)

In my c++ file, the corresponding function is defined as:

void mycppfunction(double myarray[]);

Because the size of myarray changes in matlab, I do not know how to define the <SHAPE>.

I have read the following page Define Missing SHAPE Parameter - MATLAB & Simulink - MathWorks Deutschland,

but I did not find an answer, if the size is unknown / changing...

Can anyone give me a tip, how to solve this problem?

Best regards.

Answer 1

[JoRo]

In case anyone faces the same issue: I solved the problem.

I had to redefine the c++ function to:

void mycppfunction(double myarray[], size_t len);

Then I had to add "len" to the definemylib.mlx file to:

defineArgument(mycppfunctionDefinition, "myarray", "clib.array.mylib.Double", "input", "len").

Now it works.