getinfo: add microsecond precise timers for various intervals

Provide a set of new timers that return the time intervals using integer
number of microseconds instead of floats.

The new info names are as following:

CURLINFO_APPCONNECT_TIME_T
CURLINFO_CONNECT_TIME_T
CURLINFO_NAMELOOKUP_TIME_T
CURLINFO_PRETRANSFER_TIME_T
CURLINFO_REDIRECT_TIME_T
CURLINFO_STARTTRANSFER_TIME_T
CURLINFO_TOTAL_TIME_T

Closes #2495

3 files changed, 28 insertions, 21 deletions

diff --git a/docs/examples/chkspeed.c b/docs/examples/chkspeed.c
index f3dd1e944..0b0ba72a0 100644
--- a/docs/examples/chkspeed.c
+++ b/docs/examples/chkspeed.c
@@ -165,33 +165,37 @@ int main(int argc, char *argv[])
   res = curl_easy_perform(curl_handle);
 
   if(CURLE_OK == res) {
-    double val;
+    curl_off_t val;
 
     /* check for bytes downloaded */
-    res = curl_easy_getinfo(curl_handle, CURLINFO_SIZE_DOWNLOAD, &val);
+    res = curl_easy_getinfo(curl_handle, CURLINFO_SIZE_DOWNLOAD_T, &val);
     if((CURLE_OK == res) && (val>0))
-      printf("Data downloaded: %0.0f bytes.\n", val);
+      printf("Data downloaded: %" CURL_FORMAT_CURL_OFF_T " bytes.\n", val);
 
     /* check for total download time */
-    res = curl_easy_getinfo(curl_handle, CURLINFO_TOTAL_TIME, &val);
+    res = curl_easy_getinfo(curl_handle, CURLINFO_TOTAL_TIME_T, &val);
     if((CURLE_OK == res) && (val>0))
-      printf("Total download time: %0.3f sec.\n", val);
+      printf("Total download time: %" CURL_FORMAT_CURL_OFF_T ".%06ld sec.\n",
+             (val / 1000000), (long)(val % 1000000));
 
     /* check for average download speed */
-    res = curl_easy_getinfo(curl_handle, CURLINFO_SPEED_DOWNLOAD, &val);
+    res = curl_easy_getinfo(curl_handle, CURLINFO_SPEED_DOWNLOAD_T, &val);
     if((CURLE_OK == res) && (val>0))
-      printf("Average download speed: %0.3f kbyte/sec.\n", val / 1024);
+      printf("Average download speed: %" CURL_FORMAT_CURL_OFF_T
+             " kbyte/sec.\n", val / 1024);
 
     if(prtall) {
       /* check for name resolution time */
-      res = curl_easy_getinfo(curl_handle, CURLINFO_NAMELOOKUP_TIME, &val);
+      res = curl_easy_getinfo(curl_handle, CURLINFO_NAMELOOKUP_TIME_T, &val);
       if((CURLE_OK == res) && (val>0))
-        printf("Name lookup time: %0.3f sec.\n", val);
+        printf("Name lookup time: %" CURL_FORMAT_CURL_OFF_T ".%06ld sec.\n",
+               (val / 1000000), (long)(val % 1000000));
 
       /* check for connect time */
-      res = curl_easy_getinfo(curl_handle, CURLINFO_CONNECT_TIME, &val);
+      res = curl_easy_getinfo(curl_handle, CURLINFO_CONNECT_TIME_T, &val);
       if((CURLE_OK == res) && (val>0))
-        printf("Connect time: %0.3f sec.\n", val);
+        printf("Connect time: %" CURL_FORMAT_CURL_OFF_T ".%06ld sec.\n",
+               (val / 1000000), (long)(val % 1000000));
     }
   }
   else {
diff --git a/docs/examples/fileupload.c b/docs/examples/fileupload.c
index 6b05c4cec..8128608c4 100644
--- a/docs/examples/fileupload.c
+++ b/docs/examples/fileupload.c
@@ -33,7 +33,7 @@ int main(void)
   CURL *curl;
   CURLcode res;
   struct stat file_info;
-  double speed_upload, total_time;
+  curl_off_t speed_upload, total_time;
   FILE *fd;
 
   fd = fopen("debugit", "rb"); /* open file to upload */
@@ -72,11 +72,13 @@ int main(void)
     }
     else {
       /* now extract transfer info */
-      curl_easy_getinfo(curl, CURLINFO_SPEED_UPLOAD, &speed_upload);
-      curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &total_time);
+      curl_easy_getinfo(curl, CURLINFO_SPEED_UPLOAD_T, &speed_upload);
+      curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME_T, &total_time);
 
-      fprintf(stderr, "Speed: %.3f bytes/sec during %.3f seconds\n",
-              speed_upload, total_time);
+      fprintf(stderr, "Speed: %" CURL_FORMAT_CURL_OFF_T " bytes/sec during %"
+              CURL_FORMAT_CURL_OFF_T ".%06ld seconds\n",
+              speed_upload,
+              (total_time / 1000000), (long)(total_time % 1000000));
 
     }
     /* always cleanup */
diff --git a/docs/examples/progressfunc.c b/docs/examples/progressfunc.c
index ab34ef988..52a3c0834 100644
--- a/docs/examples/progressfunc.c
+++ b/docs/examples/progressfunc.c
@@ -28,10 +28,10 @@
 #include <curl/curl.h>
 
 #define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES         6000
-#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL     3
+#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL     3000000
 
 struct myprogress {
-  double lastruntime;
+  curl_off_t lastruntime;
   CURL *curl;
 };
 
@@ -42,16 +42,17 @@ static int xferinfo(void *p,
 {
   struct myprogress *myp = (struct myprogress *)p;
   CURL *curl = myp->curl;
-  double curtime = 0;
+  curl_off_t curtime = 0;
 
-  curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &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;
-    fprintf(stderr, "TOTAL TIME: %f \r\n", curtime);
+    fprintf(stderr, "TOTAL TIME: %" CURL_FORMAT_CURL_OFF_T ".%06ld\r\n",
+            (curtime / 1000000), (long)(curtime % 1000000));
   }
 
   fprintf(stderr, "UP: %" CURL_FORMAT_CURL_OFF_T " of %" CURL_FORMAT_CURL_OFF_T