Added duration reporting to compact reporter

Also made the duration formatting code available to all reporters.

Closes #780

include/reporters/catch_reporter_console.hpp

@@ -18,25 +18,6 @@
 
 namespace Catch {
 
-    namespace {
-        // Because formatting using c++ streams is stateful, drop down to C is required
-        // Alternatively we could use stringstream, but its performance is... not good.
-        std::string getFormattedDuration( double duration ) {
-            // Max exponent + 1 is required to represent the whole part
-            // + 1 for decimal point
-            // + 3 for the 3 decimal places
-            // + 1 for null terminator
-            const size_t maxDoubleSize = DBL_MAX_10_EXP + 1 + 1 + 3 + 1;
-            char buffer[maxDoubleSize];
-#ifdef _MSC_VER
-            sprintf_s(buffer, "%.3f", duration);
-#else
-            sprintf(buffer, "%.3f", duration);
-#endif
-            return std::string(buffer);
-        }
-    }
-
 
     struct ConsoleReporter : StreamingReporterBase {
         ConsoleReporter( ReporterConfig const& _config )