curl/docs/libcurl/opts/CURLOPT_PROGRESSDATA.3

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.TH CURLOPT_PROGRESSDATA 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_PROGRESSDATA \- pointer passed to the progress callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROGRESSDATA, 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_PROGRESSFUNCTION(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,
                                 double dltotal,
                                 double dlnow,
                                 double ultotal,
                                 double 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_PROGRESSDATA, &data);

 curl_easy_setopt(curl_handle, CURLOPT_PROGRESSFUNCTION, progress_callback);
.fi
.SH AVAILABILITY
Always
.SH RETURN VALUE
Returns CURLE_OK
.SH "SEE ALSO"
.BR CURLOPT_PROGRESSFUNCTION "(3), " CURLOPT_XFERINFOFUNCTION "(3), "