timeouts: move ms timeouts to timediff_t from int and long

Now that all functions in select.[ch] take timediff_t instead
of the limited int or long, we can remove type conversions
and related preprocessor checks to silence compiler warnings.

Avoiding conversions from time_t was already done in 842f73de.

Based upon #5262
Supersedes #5214, #5220 and #5221
Follow up to #5343 and #5479
Closes #5490

5 files changed, 13 insertions, 9 deletions

diff --git a/lib/asyn-ares.c b/lib/asyn-ares.c
index faabe1595..ba5160b25 100644
--- a/lib/asyn-ares.c
+++ b/lib/asyn-ares.c
@@ -286,7 +286,7 @@ int Curl_resolver_getsock(struct connectdata *conn,
  * return number of sockets it worked on
  */
 
-static int waitperform(struct connectdata *conn, int timeout_ms)
+static int waitperform(struct connectdata *conn, timediff_t timeout_ms)
 {
   struct Curl_easy *data = conn->data;
   int nfds;
@@ -437,9 +437,13 @@ CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
   while(!result) {
     struct timeval *tvp, tv, store;
     int itimeout;
-    int timeout_ms;
+    timediff_t timeout_ms;
 
-    itimeout = (timeout > (long)INT_MAX) ? INT_MAX : (int)timeout;
+#if TIMEDIFF_T_MAX > INT_MAX
+    itimeout = (timeout > INT_MAX) ? INT_MAX : (int)timeout;
+#else
+    itimeout = (int)timeout;
+#endif
 
     store.tv_sec = itimeout/1000;
     store.tv_usec = (itimeout%1000)*1000;
@@ -450,7 +454,7 @@ CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
        second is left, otherwise just use 1000ms to make sure the progress
        callback gets called frequent enough */
     if(!tvp->tv_sec)
-      timeout_ms = (int)(tvp->tv_usec/1000);
+      timeout_ms = (timediff_t)(tvp->tv_usec/1000);
     else
       timeout_ms = 1000;
 
@@ -470,7 +474,7 @@ CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
       else if(timediff > timeout)
         timeout = -1;
       else
-        timeout -= (long)timediff;
+        timeout -= timediff;
       now = now2; /* for next loop */
     }
     if(timeout < 0)
diff --git a/lib/easy.c b/lib/easy.c
index f58c4521a..292cca7f6 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -510,7 +510,7 @@ static CURLcode wait_or_timeout(struct Curl_multi *multi, struct events *ev)
     before = Curl_now();
 
     /* wait for activity or timeout */
-    pollrc = Curl_poll(fds, numfds, (int)ev->ms);
+    pollrc = Curl_poll(fds, numfds, ev->ms);
 
     after = Curl_now();
 
diff --git a/lib/multi.c b/lib/multi.c
index 0a45ef4b6..a614929ec 100644
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -1255,7 +1255,7 @@ static CURLMcode Curl_multi_wait(struct Curl_multi *multi,
          timeout */
       else if((sleep_ms < 0) && extrawait)
         sleep_ms = timeout_ms;
-      Curl_wait_ms((int)sleep_ms);
+      Curl_wait_ms(sleep_ms);
     }
   }
 
diff --git a/lib/socks.c b/lib/socks.c
index 98b7818d8..93b052cf0 100644
--- a/lib/socks.c
+++ b/lib/socks.c
@@ -69,7 +69,7 @@ int Curl_blockread_all(struct connectdata *conn, /* connection data */
       break;
     }
     if(!timeout_ms)
-      timeout_ms = TIME_T_MAX;
+      timeout_ms = TIMEDIFF_T_MAX;
     if(SOCKET_READABLE(sockfd, timeout_ms) <= 0) {
       result = ~CURLE_OK;
       break;
diff --git a/lib/telnet.c b/lib/telnet.c
index 4bf4c652c..01394e1e3 100644
--- a/lib/telnet.c
+++ b/lib/telnet.c
@@ -1315,7 +1315,7 @@ static CURLcode telnet_do(struct connectdata *conn, bool *done)
   DWORD readfile_read;
   int err;
 #else
-  int interval_ms;
+  timediff_t interval_ms;
   struct pollfd pfd[2];
   int poll_cnt;
   curl_off_t total_dl = 0;