Manpages - CURLOPT_XFERINFODATA.3

CURLOPT_XFERINFODATA - pointer passed to the progress callback

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFODATA, void *pointer);

Pass a pointer that will be untouched by libcurl and passed as the first argument in the progress callback set with CURLOPT_XFERINFOFUNCTION(3).

This is an alias for CURLOPT_PROGRESSDATA(3).

The default value of this parameter is NULL.

All

   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);

Added in 7.32.0

Returns CURLE_OK

*CURLOPT_XFERINFOFUNCTION*(3), *CURLOPT_VERBOSE*(3),