[Mono-dev] Populate array of PointF

[Robert Jordan]

On 10.03.2017 23:30, Robert Jordan wrote:
> On 10.03.2017 21:54, howard.rubin wrote:
>> Maybe I'm missing something, but changing
>>     mono_runtime_invoke(ptFCtor, ptF, args, &exception);
>> to
>>     mono_runtime_invoke(ptFCtor, mono_object_unbox(ptF), args,
>> &exception);
>
>
> There are more mono_runtime_invokes in your code
> which must be changed. For example, this one:
>
>     args[0] = ptF;
>     mono_runtime_invoke(MyClassMethod, nullptr, args, &exception);
>
> It must be:
>
>     args[0] = mono_object_unbox(ptF);
>     mono_runtime_invoke(MyClassMethod, nullptr, args, &exception);
>


Long story short, here is the array manipulation code
which should go right above the invocation of

MyNamespace.MyClass:PrintArray(System.Drawing.PointF[])


// create 1 element array of PointF
MonoArray* arrayPtF = mono_array_new(domain, ptFClass, 1);

// compute size of an array element
int esize = mono_array_element_size (
	mono_object_get_class ((MonoObject *)arrayPtF));

// get a ptr to the array element at index 0
void *ptr = mono_array_addr_with_size(arrayPtF, esize, 0);

// copy ptF into the array
memcpy(ptr, mono_object_unbox(ptF), esize);


Robert