Re: DLL: (const char *paramNames[],size_t numParams)

[Basile B. via Digitalmars-d-learn]

On Monday, 9 July 2018 at 11:10:01 UTC, Basile B. wrote:
On Monday, 9 July 2018 at 10:56:18 UTC, Andre Pany wrote:
On Monday, 9 July 2018 at 10:38:54 UTC, Basile B. wrote:
On Monday, 9 July 2018 at 10:33:03 UTC, Andre Pany wrote:
Hi, no it's not correct i think, right translation would be
    extern(C) void GetParamNames(const char** paramNames, 
size_t numParams);

If you use the D array syntax you'll get into troubles 
because of ABI i think.

Baz.

Thanks, it seems I also have to allocate the pointer before 
with the numbers of numParams.
In python the code looks s.th. like this

self.output_names = (c_char_p * self.number_outputs)()

Do you know that is the equivalent in D?

Kind regards
André

you don't need to allocate but to retrieve each string, do 
something like this:

    foreach(i; 0 .. numParams)
    {
        string p = fromStringz(paramNames + i)
    }

although i have a doubt for pointer arithmetic. Maybe it should 
be incremented by

    i * size_t.sizeof

since char.sizeof is 1. Maybe someone else will be more helpful 
here.

Baz.

Ok, i've read your other answers and it seems that you have a way 
to test so i think you'll figure it out yourself, but you don't 
need to alloc. Once the fromStringz verified to be good maybe 
dup/idup in case the C lib free the stuff but that's all.