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Re: CURLOPT_WRITEFUNCTION issues - warning: curl_easy_setopt expects a curl_write_callback argument

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From: Gavin Henry via curl-library <curl-library_at_lists.haxx.se>
Date: Fri, 21 Jan 2022 14:48:20 +0000

On Fri, 21 Jan 2022 at 13:11, Daniel Stenberg <daniel_at_haxx.se> wrote:
>
> On Fri, 21 Jan 2022, Gavin Henry via curl-library wrote:
>
> > json_t *json = outstream;
> > json = json_loadb(buffer, size * nmemb, 0, NULL);
> >
> > "The value is never used". I'll leave gcc and clang to sort.
>
> The first statement here is pointless since you discard the contents and
> assign it again in the second line, which doesn't look right. I think you
> probably want something similar to:
>
> json_t **json = outstream;
> *json = json_loadb(buffer, size * nmemb, 0, NULL);
>
> Because outside of the callback you pass do:
>
> json_t *json = 0;
> curl_easy_setopt(curl, CURLOPT_WRITEDATA, &json);
>
> ... so that's a pointer to a pointer.
>

Thanks. Yeah, this is messy.

-- 
Kind Regards,
Gavin Henry.
https://sentrypeer.org
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Received on 2022-01-21

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