CURLOPT_XFERINFODATA(3) | Library Functions Manual | CURLOPT_XFERINFODATA(3) |
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
Returns CURLE_OK
SEE ALSO
CURLOPT_NOPROGRESS(3), CURLOPT_VERBOSE(3), CURLOPT_XFERINFOFUNCTION(3)
2024-09-18 | libcurl |