change `gmtime` to the safer version

1 files changed, 12 insertions, 3 deletions

diff --git a/include/logging.h b/include/logging.h
index 0d77071..b915e6e 100644
--- a/include/logging.h
+++ b/include/logging.h
@@ -39,9 +39,18 @@ namespace crow
             static std::string timestamp()
             {
                 char date[32];
-                  time_t t = time(0);
-                  strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", gmtime(&t));
-                  return std::string(date);
+                time_t t = time(0);
+
+                tm my_tm;
+
+#ifdef _MSC_VER
+                gmtime_s(&my_tm, &t);
+#else
+                gmtime_r(&t, &my_tm);
+#endif
+
+                size_t sz = strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", &my_tm);
+                return std::string(date, date+sz);
             }
 
         public: