-#define TIME_T_TO_CDTIME_T(t) (((cdtime_t) (t)) * 1073741824)
-#define CDTIME_T_TO_TIME_T(t) ((time_t) ((t) / 1073741824))
-
-#define CDTIME_T_TO_DOUBLE(t) (((double) (t)) / 1073741824.0)
-#define DOUBLE_TO_CDTIME_T(d) ((cdtime_t) ((d) * 1073741824.0))
-
-#define MS_TO_CDTIME_T(ms) ((cdtime_t) (((double) (ms)) * 1073741.824))
-#define CDTIME_T_TO_MS(t) ((long) (((double) (t)) / 1073741.824))
-#define US_TO_CDTIME_T(us) ((cdtime_t) (((double) (us)) * 1073.741824))
-#define CDTIME_T_TO_US(t) ((suseconds_t) (((double) (t)) / 1073.741824))
-#define NS_TO_CDTIME_T(ns) ((cdtime_t) (((double) (ns)) * 1.073741824))
-#define CDTIME_T_TO_NS(t) ((long) (((double) (t)) / 1.073741824))
-
-#define CDTIME_T_TO_TIMEVAL(cdt,tvp) do { \
- (tvp)->tv_sec = CDTIME_T_TO_TIME_T (cdt); \
- (tvp)->tv_usec = CDTIME_T_TO_US ((cdt) % 1073741824); \
-} while (0)
-#define TIMEVAL_TO_CDTIME_T(tv) (TIME_T_TO_CDTIME_T ((tv)->tv_sec) \
- + US_TO_CDTIME_T ((tv)->tv_usec))
-
-#define CDTIME_T_TO_TIMESPEC(cdt,tsp) do { \
- (tsp)->tv_sec = CDTIME_T_TO_TIME_T (cdt); \
- (tsp)->tv_nsec = CDTIME_T_TO_NS ((cdt) % 1073741824); \
-} while (0)
-#define TIMESPEC_TO_CDTIME_T(ts) (TIME_T_TO_CDTIME_T ((ts)->tv_sec) \
- + NS_TO_CDTIME_T ((ts)->tv_nsec))
-
-cdtime_t cdtime (void);
-
-/* format a cdtime_t value in ISO 8601 format:
- * returns the number of characters written to the string (not including the
- * terminating null byte or 0 on error; the function ensures that the string
- * is null terminated */
-size_t cdtime_to_iso8601 (char *s, size_t max, cdtime_t t);
+#define TIME_T_TO_CDTIME_T_STATIC(t) (((cdtime_t)(t)) << 30)
+#define TIME_T_TO_CDTIME_T(t) \
+ (cdtime_t) { TIME_T_TO_CDTIME_T_STATIC(t) }
+
+#define MS_TO_CDTIME_T(ms) \
+ (cdtime_t) { \
+ ((((cdtime_t)(ms)) / 1000) << 30) | \
+ ((((((cdtime_t)(ms)) % 1000) << 30) + 500) / 1000) \
+ }
+#define US_TO_CDTIME_T(us) \
+ (cdtime_t) { \
+ ((((cdtime_t)(us)) / 1000000) << 30) | \
+ ((((((cdtime_t)(us)) % 1000000) << 30) + 500000) / 1000000) \
+ }
+#define NS_TO_CDTIME_T(ns) \
+ (cdtime_t) { \
+ ((((cdtime_t)(ns)) / 1000000000) << 30) | \
+ ((((((cdtime_t)(ns)) % 1000000000) << 30) + 500000000) / 1000000000) \
+ }
+
+#define CDTIME_T_TO_TIME_T(t) \
+ (time_t) { (time_t)(((t) + (1 << 29)) >> 30) }
+#define CDTIME_T_TO_MS(t) \
+ (uint64_t) { \
+ (uint64_t)((((t) >> 30) * 1000) + \
+ ((((t)&0x3fffffff) * 1000 + (1 << 29)) >> 30)) \
+ }
+#define CDTIME_T_TO_US(t) \
+ (uint64_t) { \
+ (uint64_t)((((t) >> 30) * 1000000) + \
+ ((((t)&0x3fffffff) * 1000000 + (1 << 29)) >> 30)) \
+ }
+#define CDTIME_T_TO_NS(t) \
+ (uint64_t) { \
+ (uint64_t)((((t) >> 30) * 1000000000) + \
+ ((((t)&0x3fffffff) * 1000000000 + (1 << 29)) >> 30)) \
+ }
+
+#define CDTIME_T_TO_DOUBLE(t) \
+ (double) { ((double)(t)) / 1073741824.0 }
+#define DOUBLE_TO_CDTIME_T_STATIC(d) ((cdtime_t)((d)*1073741824.0))
+#define DOUBLE_TO_CDTIME_T(d) \
+ (cdtime_t) { DOUBLE_TO_CDTIME_T_STATIC(d) }
+
+#define CDTIME_T_TO_TIMEVAL(t) \
+ (struct timeval) { \
+ .tv_sec = (time_t)((t) >> 30), \
+ .tv_usec = (suseconds_t)((((t)&0x3fffffff) * 1000000 + (1 << 29)) >> 30), \
+ }
+#define TIMEVAL_TO_CDTIME_T(tv) \
+ US_TO_CDTIME_T(1000000 * (tv)->tv_sec + (tv)->tv_usec)
+
+#define CDTIME_T_TO_TIMESPEC(t) \
+ (struct timespec) { \
+ .tv_sec = (time_t)((t) >> 30), \
+ .tv_nsec = (long)((((t)&0x3fffffff) * 1000000000 + (1 << 29)) >> 30), \
+ }
+#define TIMESPEC_TO_CDTIME_T(ts) \
+ NS_TO_CDTIME_T(1000000000ULL * (ts)->tv_sec + (ts)->tv_nsec)
+
+cdtime_t cdtime(void);
+
+#define RFC3339_SIZE 26 /* 2006-01-02T15:04:05+00:00 */
+#define RFC3339NANO_SIZE 36 /* 2006-01-02T15:04:05.999999999+00:00 */
+
+/* rfc3339 formats a cdtime_t time as UTC in RFC 3339 zulu format with second
+ * precision, e.g., "2006-01-02T15:04:05Z". */
+int rfc3339(char *buffer, size_t buffer_size, cdtime_t t);
+
+/* rfc3339nano formats a cdtime_t as UTC time in RFC 3339 zulu format with
+ * nanosecond precision, e.g., "2006-01-02T15:04:05.999999999Z". */
+int rfc3339nano(char *buffer, size_t buffer_size, cdtime_t t);
+
+/* rfc3339 formats a cdtime_t time as local in RFC 3339 format with second
+ * precision, e.g., "2006-01-02T15:04:05+00:00". */
+int rfc3339_local(char *buffer, size_t buffer_size, cdtime_t t);
+
+/* rfc3339nano formats a cdtime_t time as local in RFC 3339 format with
+ * nanosecond precision, e.g., "2006-01-02T15:04:05.999999999+00:00". */
+int rfc3339nano_local(char *buffer, size_t buffer_size, cdtime_t t);