1 files changed, 32 insertions, 11 deletions
diff --git a/lib/timeutils/timeutils.h b/lib/timeutils/timeutils.h
index 08b0dc2e8..14da831dc 100644
--- a/lib/timeutils/timeutils.h
+++ b/lib/timeutils/timeutils.h
@@ -42,14 +42,6 @@ typedef struct _timeutils_struct_time_t {
     uint16_t tm_yday;       // 1..366
 } timeutils_struct_time_t;
 
-static inline uint64_t timeutils_seconds_since_2000_to_nanoseconds_since_1970(mp_uint_t s) {
-    return ((uint64_t)s + TIMEUTILS_SECONDS_1970_TO_2000) * 1000000000ULL;
-}
-
-static inline mp_uint_t timeutils_seconds_since_2000_from_nanoseconds_since_1970(uint64_t ns) {
-    return ns / 1000000000ULL - TIMEUTILS_SECONDS_1970_TO_2000;
-}
-
 bool timeutils_is_leap_year(mp_uint_t year);
 mp_uint_t timeutils_days_in_month(mp_uint_t year, mp_uint_t month);
 mp_uint_t timeutils_year_day(mp_uint_t year, mp_uint_t month, mp_uint_t date);
@@ -63,10 +55,39 @@ mp_uint_t timeutils_seconds_since_2000(mp_uint_t year, mp_uint_t month,
 mp_uint_t timeutils_mktime(mp_uint_t year, mp_int_t month, mp_int_t mday,
     mp_int_t hours, mp_int_t minutes, mp_int_t seconds);
 
-static inline uint64_t timeutils_nanoseconds_since_1970(mp_uint_t year, mp_uint_t month,
+// Select the Epoch used by the port.
+#if MICROPY_EPOCH_IS_1970
+
+static inline uint64_t timeutils_seconds_since_epoch(mp_uint_t year, mp_uint_t month,
     mp_uint_t date, mp_uint_t hour, mp_uint_t minute, mp_uint_t second) {
-    return timeutils_seconds_since_2000_to_nanoseconds_since_1970(
-        timeutils_seconds_since_2000(year, month, date, hour, minute, second));
+    return timeutils_seconds_since_2000(year, month, date, hour, minute, second) + TIMEUTILS_SECONDS_1970_TO_2000;
+}
+
+static inline mp_uint_t timeutils_seconds_since_epoch_from_nanoseconds_since_1970(uint64_t ns) {
+    return ns / 1000000000ULL;
+}
+
+static inline uint64_t timeutils_nanoseconds_since_epoch_to_nanoseconds_since_1970(uint64_t ns) {
+    return ns;
 }
 
+#else // Epoch is 2000
+
+#define timeutils_seconds_since_epoch_to_struct_time timeutils_seconds_since_2000_to_struct_time
+#define timeutils_seconds_since_epoch timeutils_seconds_since_2000
+
+static inline uint64_t timeutils_seconds_since_epoch_to_nanoseconds_since_1970(mp_uint_t s) {
+    return ((uint64_t)s + TIMEUTILS_SECONDS_1970_TO_2000) * 1000000000ULL;
+}
+
+static inline mp_uint_t timeutils_seconds_since_epoch_from_nanoseconds_since_1970(uint64_t ns) {
+    return ns / 1000000000ULL - TIMEUTILS_SECONDS_1970_TO_2000;
+}
+
+static inline int64_t timeutils_nanoseconds_since_epoch_to_nanoseconds_since_1970(int64_t ns) {
+    return ns + TIMEUTILS_SECONDS_1970_TO_2000 * 1000000000ULL;
+}
+
+#endif
+
 #endif // MICROPY_INCLUDED_LIB_TIMEUTILS_TIMEUTILS_H