use round() for rounding

Replace casting of values incremented by +0.5/-0.5 with round().

ntp_core.c

@@ -2604,7 +2604,7 @@ broadcast_timeout(void *arg)
   int poll;
 
   destination = ARR_GetElement(broadcasts, (long)arg);
-  poll = log(destination->interval) / log(2.0) + 0.5;
+  poll = round(log(destination->interval) / log(2.0));
 
   UTI_ZeroNtp64(&orig_ts);
   zero_local_timestamp(&recv_ts);

refclock.c

@@ -572,10 +572,7 @@ RCL_AddCookedPulse(RCL_Instance instance, struct timespec *cooked_time,
     }
 
     /* Align the offset to the reference sample */
-    if ((ref_sample.offset - offset) >= 0.0)
-      shift = (long)((ref_sample.offset - offset) * rate + 0.5) / (double)rate;
-    else
-      shift = (long)((ref_sample.offset - offset) * rate - 0.5) / (double)rate;
+    shift = round((ref_sample.offset - offset) * rate) / rate;
 
     offset += shift;
 

sys_linux.c

@@ -97,21 +97,6 @@ static int have_setoffset;
    updated in the kernel */
 static int tick_update_hz;
 
-/* ================================================== */
-
-inline static long
-our_round(double x)
-{
-  long y;
-
-  if (x > 0.0)
-    y = x + 0.5;
-  else
-    y = x - 0.5;
-
-  return y;
-}
-
 /* ================================================== */
 /* Positive means currently fast of true time, i.e. jump backwards */
 
@@ -149,7 +134,7 @@ set_frequency(double freq_ppm)
   double required_freq;
   int required_delta_tick;
 
-  required_delta_tick = our_round(freq_ppm / dhz);
+  required_delta_tick = round(freq_ppm / dhz);
 
   /* Older kernels (pre-2.6.18) don't apply the frequency offset exactly as
      set by adjtimex() and a scaling constant (that depends on the internal

util.c

@@ -123,7 +123,7 @@ UTI_DoubleToTimeval(double a, struct timeval *b)
 
   b->tv_sec = a;
   frac_part = 1.0e6 * (a - b->tv_sec);
-  b->tv_usec = frac_part > 0 ? frac_part + 0.5 : frac_part - 0.5;
+  b->tv_usec = round(frac_part);
   UTI_NormaliseTimeval(b);
 }