fix: cache line alignment

Author: milsanore

src/ui/trade_box.cpp

@@ -252,14 +252,16 @@ void TradeBox::on_trade(const FIX44::MarketDataIncrementalRefresh& msg) {
           group.getField(side_field);
           side = binance::Side::from_str(side_field.getValue());
 
-          std::array<char, 16> tm_arr = {};
+          constexpr size_t TIME_STRLEN = 16;
+          std::array<char, TIME_STRLEN> tm_arr{};
           if (group.isSetField(FIX::FIELD::TransactTime)) {
             group.getField(e_time);
             FIX::UtcTimeStamp tval = e_time.getValue();
-            int microseconds = tval.getMillisecond() * 1000 + tval.getMicroecond();
-            std::snprintf(tm_arr.data(), tm_arr.size(), "%02d:%02d:%02d.%06d",
-                          tval.getHour(), tval.getMinute(), tval.getSecond(),
-                          microseconds);
+            std::snprintf(tm_arr.data(), tm_arr.size(), "%02u:%02u:%02u.%06u",
+                          std::min<unsigned>(tval.getHour(), 23),
+                          std::min<unsigned>(tval.getMinute(), 59),
+                          std::min<unsigned>(tval.getSecond(), 59),
+                          std::min<unsigned>(tval.getMicroecond(), 999999));
           }
 
           trade_ring_.push_back(core::Trade(price, size, trade_id_uint, side, tm_arr));