avoid 64 bit integer division in Stopwatch_ElapsedMilliseconds, ~200 lines less in webclient

src/Http.c

@@ -1005,7 +1005,7 @@ static void WorkerLoop(void) {
 		request.result = Http_BackendDo(&request, &url);
 		end = Stopwatch_Measure();
 
-		elapsed = (int)Stopwatch_ElapsedMilliseconds(beg, end);
+		elapsed = Stopwatch_ElapsedMilliseconds(beg, end);
 		Platform_Log4("HTTP: result %i (http %i) in %i ms (%i bytes)",
 					&request.result, &request.statusCode, &elapsed, &request.size);
 		Http_FinishRequest(&request);

src/Platform.c

@@ -191,8 +191,10 @@ cc_uint64 Stopwatch_ElapsedMicroseconds(cc_uint64 beg, cc_uint64 end) {
 	return ((end - beg) * sw_freqMul) / sw_freqDiv;
 }
 
-cc_uint64 Stopwatch_ElapsedMilliseconds(cc_uint64 beg, cc_uint64 end) {
-	return Stopwatch_ElapsedMicroseconds(beg, end) / 1000;
+int Stopwatch_ElapsedMilliseconds(cc_uint64 beg, cc_uint64 end) {
+	cc_uint64 raw = Stopwatch_ElapsedMicroseconds(beg, end);
+	if (raw > Int32_MaxValue) return Int32_MaxValue / 1000;
+	return (int)raw / 1000;
 }
 
 #if defined CC_BUILD_WIN

src/Platform.h

@@ -141,7 +141,7 @@ CC_API cc_uint64 Stopwatch_Measure(void);
 /* Returns total elapsed microseconds between two stopwatch measurements. */
 CC_API cc_uint64 Stopwatch_ElapsedMicroseconds(cc_uint64 beg, cc_uint64 end);
 /* Returns total elapsed milliseconds between two stopwatch measurements. */
-CC_API cc_uint64 Stopwatch_ElapsedMilliseconds(cc_uint64 beg, cc_uint64 end);
+CC_API int Stopwatch_ElapsedMilliseconds(cc_uint64 beg, cc_uint64 end);
 
 /* Returns non-zero if the given directory exists. */
 CC_API int Directory_Exists(const cc_string* path);

src/Protocol.c

@@ -534,7 +534,7 @@ static void Classic_LevelFinalise(cc_uint8* data) {
 	int delta;
 
 	end   = Stopwatch_Measure();
-	delta = (int)Stopwatch_ElapsedMilliseconds(map_receiveBeg, end);
+	delta = Stopwatch_ElapsedMilliseconds(map_receiveBeg, end);
 	Platform_Log1("map loading took: %i", &delta);
 	map_begunLoading = false;
 	WoM_CheckSendWomID();