NAME¶

CURLOPT_XFERINFODATA - pointer passed to the progress callback

SYNOPSIS¶

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFODATA, void *pointer);

DESCRIPTION¶

Pass a pointer that is 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).

DEFAULT¶

NULL

PROTOCOLS¶

This functionality affects all supported protocols

EXAMPLE¶

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);


  }
}

AVAILABILITY¶

Added in curl 7.32.0

RETURN VALUE¶

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO¶

CURLOPT_NOPROGRESS(3), CURLOPT_VERBOSE(3), CURLOPT_XFERINFOFUNCTION(3)