NAME

CURLOPT_PROGRESSDATA - pointer passed to the progress callback

SYNOPSIS

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

DESCRIPTION

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

DEFAULT

NULL

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE

struct progress {


  char *private;


  size_t size;
};
static size_t progress_callback(void *clientp,


                                double dltotal,


                                double dlnow,


                                double ultotal,


                                double ulnow)
{


  struct progress *memory = clientp;


  printf("private: %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_PROGRESSDATA, &data);


    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);


    curl_easy_perform(curl);


  }
}

AVAILABILITY

Added in curl 7.1

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).