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repo/core/curl/files/CURLOPT_XFERINFODATA.3
2024-03-30 13:28:04 -05:00

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Groff

.\" generated by cd2nroff 0.1 from CURLOPT_XFERINFODATA.md
.TH CURLOPT_XFERINFODATA 3 libcurl
.SH NAME
CURLOPT_XFERINFODATA \- pointer passed to the progress callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFODATA, void *pointer);
.fi
.SH DESCRIPTION
Pass a \fIpointer\fP that is untouched by libcurl and passed as the first
argument in the progress callback set with \fICURLOPT_XFERINFOFUNCTION(3)\fP.
This is an alias for \fICURLOPT_PROGRESSDATA(3)\fP.
.SH DEFAULT
The default value of this parameter is NULL.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
struct progress {
char *private;
size_t size;
};
static size_t progress_cb(void *clientp,
curl_off_t dltotal,
curl_off_t dlnow,
curl_off_t ultotal,
curl_off_t ulnow)
{
struct progress *memory = clientp;
printf("private ptr: %p\\n", memory->private);
/* use the values */
return 0; /* all is good */
}
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
struct progress data;
/* pass struct to callback */
curl_easy_setopt(curl, CURLOPT_XFERINFODATA, &data);
curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, progress_cb);
}
}
.fi
.SH AVAILABILITY
Added in 7.32.0
.SH RETURN VALUE
Returns CURLE_OK
.SH SEE ALSO
.BR CURLOPT_NOPROGRESS (3),
.BR CURLOPT_VERBOSE (3),
.BR CURLOPT_XFERINFOFUNCTION (3)