curl/docs/libcurl/opts/CURLOPT_XFERINFODATA.3

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.TH CURLOPT_XFERINFODATA 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.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 will be 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_callback(void *clientp,
                                 curl_off_t dltotal,
                                 curl_off_t dlnow,
                                 curl_off_t ultotal,
                                 curl_off_t ulnow)
 {
   struct memory *progress = (struct progress *)userp;

   /* 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
.SH AVAILABILITY
Added in 7.32.0
.SH RETURN VALUE
Returns CURLE_OK
.SH "SEE ALSO"
.BR CURLOPT_XFERINFOFUNCTION "(3), " CURLOPT_VERBOSE "(3), "