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example/progressfunc: remove code for old libcurls

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7.61.0 is over three years old now, remove all #ifdefs for handling
ancient libcurl versions so that the example gets easier to read and
understand

Closes #8137
This commit is contained in:
Daniel Stenberg 2021-12-13 11:13:17 +01:00
parent d6ff35b5a5
commit e75bc3ae3f
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GPG key ID: 5CC908FDB71E12C2
1 changed files with 4 additions and 53 deletions
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57
docs/examples/progressfunc.c
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@ -27,25 +27,11 @@
#include <stdio.h>
#include <curl/curl.h>
#if LIBCURL_VERSION_NUM >= 0x073d00
/* In libcurl 7.61.0, support was added for extracting the time in plain
microseconds. Older libcurl versions are stuck in using 'double' for this
information so we complicate this example a bit by supporting either
approach. */
#define TIME_IN_US 1 /* microseconds */
#define TIMETYPE curl_off_t
#define TIMEOPT CURLINFO_TOTAL_TIME_T
#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL 3000000
#else
#define TIMETYPE double
#define TIMEOPT CURLINFO_TOTAL_TIME
#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL 3
#endif
#define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES 6000
struct myprogress {
TIMETYPE lastruntime; /* type depends on version, see above */
curl_off_t lastruntime; /* type depends on version, see above */
CURL *curl;
};
@ -56,21 +42,17 @@ static int xferinfo(void *p,
{
struct myprogress *myp = (struct myprogress *)p;
CURL *curl = myp->curl;
TIMETYPE curtime = 0;
curl_off_t curtime = 0;
curl_easy_getinfo(curl, TIMEOPT, &curtime);
curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME_T, &curtime);
/* under certain circumstances it may be desirable for certain functionality
to only run every N seconds, in order to do this the transaction time can
be used */
if((curtime - myp->lastruntime) >= MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL) {
myp->lastruntime = curtime;
#ifdef TIME_IN_US
fprintf(stderr, "TOTAL TIME: %" CURL_FORMAT_CURL_OFF_T ".%06ld\r\n",
(curtime / 1000000), (long)(curtime % 1000000));
#else
fprintf(stderr, "TOTAL TIME: %f \r\n", curtime);
#endif
}
fprintf(stderr, "UP: %" CURL_FORMAT_CURL_OFF_T " of %" CURL_FORMAT_CURL_OFF_T
@ -83,20 +65,6 @@ static int xferinfo(void *p,
return 0;
}
#if LIBCURL_VERSION_NUM < 0x072000
/* for libcurl older than 7.32.0 (CURLOPT_PROGRESSFUNCTION) */
static int older_progress(void *p,
double dltotal, double dlnow,
double ultotal, double ulnow)
{
return xferinfo(p,
(curl_off_t)dltotal,
(curl_off_t)dlnow,
(curl_off_t)ultotal,
(curl_off_t)ulnow);
}
#endif
int main(void)
{
CURL *curl;
@ -110,26 +78,9 @@ int main(void)
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
#if LIBCURL_VERSION_NUM >= 0x072000
/* xferinfo was introduced in 7.32.0, no earlier libcurl versions will
compile as they will not have the symbols around.
If built with a newer libcurl, but running with an older libcurl:
curl_easy_setopt() will fail in run-time trying to set the new
callback, making the older callback get used.
New libcurls will prefer the new callback and instead use that one even
if both callbacks are set. */
curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, xferinfo);
/* pass the struct pointer into the xferinfo function, note that this is
an alias to CURLOPT_PROGRESSDATA */
/* pass the struct pointer into the xferinfo function */
curl_easy_setopt(curl, CURLOPT_XFERINFODATA, &prog);
#else
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, older_progress);
/* pass the struct pointer into the progress function */
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &prog);
#endif
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
res = curl_easy_perform(curl);