1 files changed, 8 insertions, 7 deletions

diff --git a/timer/src/timer.c b/timer/src/timer.c
index 2b34851..340cd98 100644
--- a/timer/src/timer.c
+++ b/timer/src/timer.c
@@ -7,9 +7,9 @@
 #endif
 
 #ifdef _WIN32
-static const int64_t microseconds = 1000000;
+static constexpr uint64_t microseconds = 1000000;
 #endif
-static const int64_t nanoseconds = 1000000000;
+static constexpr uint64_t nanoseconds = 1000000000;
 
 #ifdef _WIN32
 static double seconds_per_count;
@@ -61,7 +61,8 @@ time_delta time_diff(time_point start, time_point end) {
   // another processor, then the delta time can be negative.
   return std::max(0, end - start);
 #else
-  return (end.tv_sec - start.tv_sec) * 1e9 + (end.tv_nsec - start.tv_nsec);
+  return (end.tv_sec - start.tv_sec) * nanoseconds +
+         (end.tv_nsec - start.tv_nsec);
 #endif
 }
 
@@ -77,7 +78,7 @@ time_delta sec_to_time_delta(double seconds) {
 #ifdef _WIN32
   return (time_delta)(seconds / seconds_per_count);
 #else
-  return (time_delta)(seconds * 1.0e9);
+  return (time_delta)(seconds * nanoseconds);
 #endif
 }
 
@@ -85,7 +86,7 @@ uint64_t time_point_to_ns(time_point t) {
 #ifdef _WIN32
   return (uint64_t)((double)t * seconds_per_count * 1.0e+9);
 #else
-  return (uint64_t)t.tv_sec * 1e+9 + (uint64_t)t.tv_nsec;
+  return (uint64_t)t.tv_sec * nanoseconds + (uint64_t)t.tv_nsec;
 #endif
 }
 
@@ -94,10 +95,10 @@ void time_sleep(time_delta dt) {
   const int64_t ms = dt / microseconds;
   Sleep((DWORD)(ms));
 #else
-  const int64_t   sec = dt / nanoseconds;
+  const uint64_t  sec = dt / nanoseconds;
   struct timespec ts;
   ts.tv_sec  = (long)sec;
   ts.tv_nsec = (long)(dt % nanoseconds);
-  nanosleep(&ts, NULL);
+  nanosleep(&ts, nullptr);
 #endif
 }