static int get_rise_set(date_t todayGreg, double *h_rise, double *h_set, double *gmt_offset)
{
double latitude, longitude;
timelib_sll rise, set, transit;
int rs;
timelib_time *t;
latitude = (double) latdeg + (latmin / 60.0);
longitude = (longdeg * -1.0) + ((longmin * -1.0) / 60.0);
t = timelib_time_ctor();
t->y = todayGreg.yy;
t->m = todayGreg.mm;
t->d = todayGreg.dd;
t->h = 17; /* assume 5pm */
timelib_set_timezone(t, TZ_INFO);
/* t->tz_info = TZ_INFO; */
/* t->zone_type = TIMELIB_ZONETYPE_ID; */
/* t->is_localtime = 1; */
/* t->have_zone = 1; */
timelib_update_ts(t, TZ_INFO);
*gmt_offset = timelib_get_current_offset(t) / 3600.0;
rs = timelib_astro_rise_set_altitude(t, longitude, latitude,
SUNRISE_SUNSET_ALTITUDE, 1,
h_rise, h_set, &rise, &set, &transit);
timelib_time_dtor(t);
return rs;
}
int main(int argc, char *argv[])
{
timelib_time *t;
timelib_sll rise, set, transit;
int rs, h, m, s;
double h_rise, h_set;
if (argc != 4) {
printf("Usage: ./test-astro time longitude latitude\n ./test-astro \"2005-10-17 00:00:00\" 9.627 59.186\n");
return -1;
}
t = timelib_strtotime(argv[1] /*"2005-10-17 00:00:00"*/, strlen(argv[1]), NULL, timelib_builtin_db(), timelib_parse_tzfile);
timelib_dump_date(t, 1);
rs = timelib_astro_rise_set_altitude(t, atof(argv[2]) /*9.627*/, atof(argv[3]) /*59.186*/, 0, 0, &h_rise, &h_set, &rise, &set, &transit);
switch (rs) {
case 0:
break;
case +1:
printf( "Sun always above horizon\n");
break;
case -1:
printf( "Sun always below horizon\n");
break;
}
timelib_unixtime2local(t, rise);
timelib_dump_date(t, 1);
timelib_decimal_hour_to_hms(h_rise, &h, &m, &s);
timelib_unixtime2local(t, set);
timelib_dump_date(t, 1);
timelib_decimal_hour_to_hms(h_set, &h, &m, &s);
if (t->tz_info) {
timelib_tzinfo_dtor(t->tz_info);
}
timelib_time_dtor(t);
return 0;
}
