- /* then convert the result to the time structure */
-
- /* Since there was no gmtime_r() to do this stuff for us,
- we have to do it the hard way. */
- {
- /* The VMS epoch is the astronomical Smithsonian date,
- if I remember correctly, which is November 17, 1858.
- Furthermore, time is measure in thenths of microseconds
- and stored in quadwords (64 bit integers). unix_epoch
- below is January 1st 1970 expressed as a VMS time. The
- following code was used to get this number:
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <lib$routines.h>
- #include <starlet.h>
-
- main()
- {
- unsigned long systime[2];
- unsigned short epoch_values[7] =
- { 1970, 1, 1, 0, 0, 0, 0 };
-
- lib$cvt_vectim(epoch_values, systime);
-
- printf("%u %u", systime[0], systime[1]);
- }
- */
- unsigned long unix_epoch[2] = { 1273708544, 8164711 };
- unsigned long deltatime[2];
- unsigned long systime[2];
- struct vms_vectime
- {
- short year, month, day, hour, minute, second,
- centi_second;
- } time_values;
- long operation;
-
- /* Turn the number of seconds since January 1st 1970 to
- an internal delta time.
- Note that lib$cvt_to_internal_time() will assume
- that t is signed, and will therefore break on 32-bit
- systems some time in 2038.
- */
- operation = LIB$K_DELTA_SECONDS;
- status = lib$cvt_to_internal_time(&operation,
- &t, deltatime);
-
- /* Add the delta time with the Unix epoch and we have
- the current UTC time in internal format */
- status = lib$add_times(unix_epoch, deltatime, systime);
-
- /* Turn the internal time into a time vector */
- status = sys$numtim(&time_values, systime);
-
- /* Fill in the struct tm with the result */
- result->tm_sec = time_values.second;
- result->tm_min = time_values.minute;
- result->tm_hour = time_values.hour;
- result->tm_mday = time_values.day;
- result->tm_mon = time_values.month - 1;
- result->tm_year = time_values.year - 1900;
-
- operation = LIB$K_DAY_OF_WEEK;
- status = lib$cvt_from_internal_time(&operation,
- &result->tm_wday, systime);
- result->tm_wday %= 7;
-
- operation = LIB$K_DAY_OF_YEAR;
- status = lib$cvt_from_internal_time(&operation,
- &result->tm_yday, systime);
- result->tm_yday--;
-
- result->tm_isdst = 0; /* There's no way to know... */
-
- ts = result;
- }
- }
+ /* then convert the result to the time structure */
+
+ /*
+ * Since there was no gmtime_r() to do this stuff for us, we have to
+ * do it the hard way.
+ */
+ {
+ /*-
+ * The VMS epoch is the astronomical Smithsonian date,
+ if I remember correctly, which is November 17, 1858.
+ Furthermore, time is measure in tenths of microseconds
+ and stored in quadwords (64 bit integers). unix_epoch
+ below is January 1st 1970 expressed as a VMS time. The
+ following code was used to get this number:
+
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <lib$routines.h>
+ #include <starlet.h>
+
+ main()
+ {
+ unsigned long systime[2];
+ unsigned short epoch_values[7] =
+ { 1970, 1, 1, 0, 0, 0, 0 };
+
+ lib$cvt_vectim(epoch_values, systime);
+
+ printf("%u %u", systime[0], systime[1]);
+ }
+ */
+ unsigned long unix_epoch[2] = { 1273708544, 8164711 };
+ unsigned long deltatime[2];
+ unsigned long systime[2];
+ struct vms_vectime {
+ short year, month, day, hour, minute, second, centi_second;
+ } time_values;
+ long operation;
+
+ /*
+ * Turn the number of seconds since January 1st 1970 to an
+ * internal delta time. Note that lib$cvt_to_internal_time() will
+ * assume that t is signed, and will therefore break on 32-bit
+ * systems some time in 2038.
+ */
+ operation = LIB$K_DELTA_SECONDS;
+ status = lib$cvt_to_internal_time(&operation, &t, deltatime);
+
+ /*
+ * Add the delta time with the Unix epoch and we have the current
+ * UTC time in internal format
+ */
+ status = lib$add_times(unix_epoch, deltatime, systime);
+
+ /* Turn the internal time into a time vector */
+ status = sys$numtim(&time_values, systime);
+
+ /* Fill in the struct tm with the result */
+ result->tm_sec = time_values.second;
+ result->tm_min = time_values.minute;
+ result->tm_hour = time_values.hour;
+ result->tm_mday = time_values.day;
+ result->tm_mon = time_values.month - 1;
+ result->tm_year = time_values.year - 1900;
+
+ operation = LIB$K_DAY_OF_WEEK;
+ status = lib$cvt_from_internal_time(&operation,
+ &result->tm_wday, systime);
+ result->tm_wday %= 7;
+
+ operation = LIB$K_DAY_OF_YEAR;
+ status = lib$cvt_from_internal_time(&operation,
+ &result->tm_yday, systime);
+ result->tm_yday--;
+
+ result->tm_isdst = 0; /* There's no way to know... */
+
+ ts = result;
+ }
+ }