log, timer: improve BCLog::LogMsg()

- make timer code more homogeneous
- replace division with multiplication
- log if the time type is unexpected

src/logging/timer.h

@@ -60,21 +60,13 @@ public:
 
         if (std::is_same<TimeType, std::chrono::microseconds>::value) {
             return strprintf("%s: %s (%iμs)", m_prefix, msg, end_time.count());
-        }
-
-        std::string units;
-        float divisor = 1;
-
-        if (std::is_same<TimeType, std::chrono::milliseconds>::value) {
-            units = "ms";
-            divisor = 1000.;
+        } else if (std::is_same<TimeType, std::chrono::milliseconds>::value) {
+            return strprintf("%s: %s (%.2fms)", m_prefix, msg, end_time.count() * 0.001);
         } else if (std::is_same<TimeType, std::chrono::seconds>::value) {
-            units = "s";
-            divisor = 1000. * 1000.;
+            return strprintf("%s: %s (%.2fs)", m_prefix, msg, end_time.count() * 0.000001);
+        } else {
+            return "Error: unexpected time type";
         }
-
-        const float time_ms = end_time.count() / divisor;
-        return strprintf("%s: %s (%.2f%s)", m_prefix, msg, time_ms, units);
     }
 
 private:

src/test/logging_tests.cpp

@@ -15,9 +15,9 @@ BOOST_FIXTURE_TEST_SUITE(logging_tests, BasicTestingSetup)
 BOOST_AUTO_TEST_CASE(logging_timer)
 {
     SetMockTime(1);
-    auto sec_timer = BCLog::Timer<std::chrono::seconds>("tests", "end_msg");
+    auto micro_timer = BCLog::Timer<std::chrono::microseconds>("tests", "end_msg");
     SetMockTime(2);
-    BOOST_CHECK_EQUAL(sec_timer.LogMsg("test secs"), "tests: test secs (1.00s)");
+    BOOST_CHECK_EQUAL(micro_timer.LogMsg("test micros"), "tests: test micros (1000000μs)");
 
     SetMockTime(1);
     auto ms_timer = BCLog::Timer<std::chrono::milliseconds>("tests", "end_msg");
@@ -25,9 +25,14 @@ BOOST_AUTO_TEST_CASE(logging_timer)
     BOOST_CHECK_EQUAL(ms_timer.LogMsg("test ms"), "tests: test ms (1000.00ms)");
 
     SetMockTime(1);
-    auto micro_timer = BCLog::Timer<std::chrono::microseconds>("tests", "end_msg");
+    auto sec_timer = BCLog::Timer<std::chrono::seconds>("tests", "end_msg");
     SetMockTime(2);
-    BOOST_CHECK_EQUAL(micro_timer.LogMsg("test micros"), "tests: test micros (1000000μs)");
+    BOOST_CHECK_EQUAL(sec_timer.LogMsg("test secs"), "tests: test secs (1.00s)");
+
+    SetMockTime(1);
+    auto minute_timer = BCLog::Timer<std::chrono::minutes>("tests", "end_msg");
+    SetMockTime(2);
+    BOOST_CHECK_EQUAL(minute_timer.LogMsg("test minutes"), "Error: unexpected time type");
 }
 
 BOOST_AUTO_TEST_SUITE_END()