curl/docs/libcurl/opts/CURLOPT_XFERINFODATA.3

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.TH CURLOPT_XFERINFODATA 3 "17 Jun 2014" libcurl libcurl
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.SH NAME
CURLOPT_XFERINFODATA \- pointer passed to the progress callback
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.SH SYNOPSIS
.nf
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#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFODATA, void *pointer);
.fi
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.SH DESCRIPTION
Pass a \fIpointer\fP that is untouched by libcurl and passed as the first
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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_callback(void *clientp,
curl_off_t dltotal,
curl_off_t dlnow,
curl_off_t ultotal,
curl_off_t ulnow)
{
struct memory *progress = (struct progress *)clientp;
/* use the values */
return 0; /* all is good */
}
struct progress data;
/* pass struct to callback */
curl_easy_setopt(curl_handle, CURLOPT_XFERINFODATA, &data);
curl_easy_setopt(curl_handle, CURLOPT_XFERINFOFUNCTION, progress_callback);
.fi
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.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)