Re: Problem passing Array of Structs to external library

[Jussi Lahtinen <jussi.lahtinen@xxxxxxxxx>]

Oh wait... the wrong order was just an artifact of my sloppy fix. The real
issue was just usage of the object.


Jussi

On Thu, Apr 4, 2024 at 1:21 AM Jussi Lahtinen <jussi.lahtinen@xxxxxxxxx>
wrote:

> "Of" the array, not "if".
>
> Jussi
>
> On Thu, Apr 4, 2024 at 1:20 AM Jussi Lahtinen <jussi.lahtinen@xxxxxxxxx>
> wrote:
>
>> Some mistakes. Object instead of embedded array and wrong order if the
>> array.
>> See the attachment.
>>
>>
>> Jussi
>>
>>
>> On Wed, Apr 3, 2024 at 8:00 PM T Lee Davidson <t.lee.davidson@xxxxxxxxx>
>> wrote:
>>
>>> I'm working with an external library that allows to pass an array of
>>> structures in the extra arguments of a variadic function.
>>> It does not work well with the array of structures that I try passing to
>>> it.
>>>
>>> With a C structure defined thusly:
>>>
>>> struct OptionItem
>>> {
>>>    int option;
>>>    intptr_t value;
>>>    void *ptr_value;
>>> };
>>>
>>> ... it does work if a C function passes the following as "ops":
>>>
>>> struct OptionItem ops[] = {
>>> { OPTION_CONNECTION_TIMEOUT, 31, NULL },
>>> { OPTION_CONNECTION_LIMIT, 21, NULL },
>>> { OPTION_CONNECTION_MEMORY_LIMIT, 11, NULL},
>>> { OPTION_END, 0, NULL }
>>> };
>>>
>>> Isn't that an array of structures?
>>>
>>> Strangely, if I pass it just a single structure (instead of an array),
>>> it does not complain but actually parses it.
>>>
>>> Perhaps I am misunderstanding how this should work.
>>>
>>> I have taken source code from that shared library and pared it down to
>>> create a small library that demonstrates the issue. It,
>>> with its source code, is included in the project which is attached.
>>>
>>> --
>>> Lee
>>>
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>>>
>>