timeval: prefer time_t to hold seconds instead of long

... as long is still 32bit on modern 64bit windows machines, while
time_t is generally 64bit.

lib/progress.c

@@ -249,24 +249,26 @@ long Curl_pgrsLimitWaitTime(curl_off_t cursize,
                             struct timeval start,
                             struct timeval now)
 {
-    curl_off_t size = cursize - startsize;
-    long minimum, actual;
+  curl_off_t size = cursize - startsize;
+  size_t minimum;
+  size_t actual;
 
-    /* we don't have a starting point yet -- return 0 so it gets (re)set */
-    if(start.tv_sec == 0 && start.tv_usec == 0)
-        return 0;
+  /* we don't have a starting point yet -- return 0 so it gets (re)set */
+  if(start.tv_sec == 0 && start.tv_usec == 0)
+    return 0;
 
-    /* not enough data yet */
-    if(size < limit)
-      return -1;
+  /* not enough data yet */
+  if(size < limit)
+    return -1;
 
-    minimum = (long) (CURL_OFF_T_C(1000) * size / limit);
-    actual = Curl_tvdiff(now, start);
+  minimum = (time_t) (CURL_OFF_T_C(1000) * size / limit);
+  actual = Curl_tvdiff(now, start);
 
-    if(actual < minimum)
-      return minimum - actual;
-    else
-      return 0;
+  if(actual < minimum)
+    /* this is a conversion on some systems (64bit time_t => 32bit long) */
+    return (long)(minimum - actual);
+  else
+    return 0;
 }
 
 void Curl_pgrsSetDownloadCounter(struct Curl_easy *data, curl_off_t size)
@@ -373,7 +375,7 @@ int Curl_pgrsUpdate(struct connectdata *conn)
      (data->progress.timespent>0?data->progress.timespent:1));
 
   /* Calculations done at most once a second, unless end is reached */
-  if(data->progress.lastshow != (long)now.tv_sec) {
+  if(data->progress.lastshow != now.tv_sec) {
     shownow = TRUE;
 
     data->progress.lastshow = now.tv_sec;
@@ -400,7 +402,7 @@ int Curl_pgrsUpdate(struct connectdata *conn)
 
     /* first of all, we don't do this if there's no counted seconds yet */
     if(countindex) {
-      long span_ms;
+      time_t span_ms;
 
       /* Get the index position to compare with the 'nowindex' position.
          Get the oldest entry possible. While we have less than CURR_TIME

lib/speedcheck.c

@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -40,8 +40,8 @@ CURLcode Curl_speedcheck(struct Curl_easy *data,
      data->set.low_speed_time &&
      (Curl_tvlong(data->state.keeps_speed) != 0) &&
      (data->progress.current_speed < data->set.low_speed_limit)) {
-    long howlong = Curl_tvdiff(now, data->state.keeps_speed);
-    long nextcheck = (data->set.low_speed_time * 1000) - howlong;
+    time_t howlong = Curl_tvdiff(now, data->state.keeps_speed);
+    time_t nextcheck = (data->set.low_speed_time * 1000) - howlong;
 
     /* We are now below the "low speed limit". If we are below it
        for "low speed time" seconds we consider that enough reason

lib/timeval.c

@@ -116,7 +116,7 @@ struct timeval curlx_tvnow(void)
  * Returns: the time difference in number of milliseconds. For large diffs it
  * returns 0x7fffffff on 32bit time_t systems.
  */
-long curlx_tvdiff(struct timeval newer, struct timeval older)
+time_t curlx_tvdiff(struct timeval newer, struct timeval older)
 {
 #if SIZEOF_TIME_T < 8
   /* for 32bit time_t systems, add a precaution to avoid overflow for really
@@ -126,7 +126,7 @@ long curlx_tvdiff(struct timeval newer, struct timeval older)
     return 0x7fffffff;
 #endif
   return (newer.tv_sec-older.tv_sec)*1000+
-    (long)(newer.tv_usec-older.tv_usec)/1000;
+    (time_t)(newer.tv_usec-older.tv_usec)/1000;
 }
 
 /*
@@ -144,7 +144,7 @@ double curlx_tvdiff_secs(struct timeval newer, struct timeval older)
 }
 
 /* return the number of seconds in the given input timeval struct */
-long Curl_tvlong(struct timeval t1)
+time_t Curl_tvlong(struct timeval t1)
 {
   return t1.tv_sec;
 }

lib/timeval.h

@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -37,7 +37,7 @@ struct timeval curlx_tvnow(void);
  *
  * Returns: the time difference in number of milliseconds.
  */
-long curlx_tvdiff(struct timeval t1, struct timeval t2);
+time_t curlx_tvdiff(struct timeval t1, struct timeval t2);
 
 /*
  * Same as curlx_tvdiff but with full usec resolution.
@@ -46,7 +46,7 @@ long curlx_tvdiff(struct timeval t1, struct timeval t2);
  */
 double curlx_tvdiff_secs(struct timeval t1, struct timeval t2);
 
-long Curl_tvlong(struct timeval t1);
+time_t Curl_tvlong(struct timeval t1);
 
 /* These two defines below exist to provide the older API for library
    internals only. */

lib/urldata.h

@@ -1146,8 +1146,8 @@ struct PureInfo {
 
 
 struct Progress {
-  long lastshow; /* time() of the last displayed progress meter or NULL to
-                    force redraw at next call */
+  time_t lastshow; /* time() of the last displayed progress meter or NULL to
+                      force redraw at next call */
   curl_off_t size_dl; /* total expected size */
   curl_off_t size_ul; /* total expected size */
   curl_off_t downloaded; /* transferred so far */