int main(int argc, char **argv)
{
int counter = 0;
/*
* 1 = monday, 2 = tuesday, ..., 7 = sunday
* */
int _first = (1 + (is_leap_year(1900) ? 366 : 365)) % 7;
if(_first == 0)
counter++;
for(int y = 1901; y <= 2000; y++) {
for(int m = 1; m <= 12; m++) {
_first = (_first + num_days_in_month(y, m)) % 7;
if(_first == 0)
counter++;
}
}
printf("Num sundays: %d\n", counter);
return 0;
}
/*
* HEADER:100:fix_CFSv2_fcst:misc:3:fixes CFSv2 monthly fcst X=daily or 00/06/12/18 Y=pert no. Z=number ens fcsts v1.0
*/
int f_fix_CFSv2_fcst(ARG3) {
int subcenter, n_time_ranges, fcst_time_0, fcst_time_1, i;
int dtime, unit, id;
int ref_year, ref_month, ref_day, ref_hour, ref_minute, ref_second;
int fcst0_year, fcst0_month, fcst0_day, fcst0_hour, fcst0_minute, fcst0_second;
int fcst1_year, fcst1_month, fcst1_day, fcst1_hour, fcst1_minute, fcst1_second;
static unsigned char new_sec4[61];
struct local_struct {
int fixed; // number of fields processed
int dt; // dt either 6 or 24
int hour0; // initial hour
int pert; // perturbation no, 0 = ctl
int num_ensemble_members;
};
struct local_struct *save;
if (mode == -1) {
*local = save = (struct local_struct *)malloc( sizeof(struct local_struct));
save->fixed = 0;
save->dt = 24;
if (strcmp(arg1,"daily") == 0) {
save->dt = 6;
save->hour0 = 0;
}
else if (strcmp(arg1,"00") == 0) {
save->hour0 = 0;
}
else if (strcmp(arg1,"06") == 0) {
save->hour0 = 6;
}
else if (strcmp(arg1,"12") == 0) {
save->hour0 = 12;
}
else if (strcmp(arg1,"18") == 0) {
save->hour0 = 1;
}
else fatal_error("fix_CFSv2_fcst: bad arg %s, wanted daily,00,06,12 or 18",arg1);
save->pert = atoi(arg2);
save->num_ensemble_members = atoi(arg2);
}
save = *local;
if (mode == -2) sprintf(inv_out,"fix_CFSRv2_fcst %d fields fixed" , save->fixed);
if (mode < 0) return 0;
// only process NCEP CFSv2 monthly forecasts
// must be NCEP generated
if (GB2_Center(sec) != NCEP) return 0;
// subcenter should be 0, 1 (reanalysis), 3 (EMC) or 4 (NCO)
subcenter = GB2_Subcenter(sec);
if (subcenter != 0 && subcenter != 1 && subcenter != 3 && subcenter != 4) return 0;
// must have process id = 82 or 98
id = analysis_or_forecast_generating_process_identifier(sec);
if (id != 82 && id != 98) return 0;
// product defn table must be 8 (fcst average)
if ( code_table_4_0(sec) != 8) return 0;
// n_time_ranges should be 1
if ( (n_time_ranges = sec[4][41]) != 1) {
fprintf(stderr,"unexected CFSv2 type forecast field .. pdt=8, n=%d\n", n_time_ranges);
return 0;
}
// forecast time units should be months
if (sec[4][17] != 3 || sec[4][48] != 3) return 0;
fcst_time_0 = int4(sec[4]+18);
fcst_time_1 = int4(sec[4]+49) + fcst_time_0;
// get reference time
reftime(sec, &ref_year, &ref_month, &ref_day, &ref_hour, &ref_minute, &ref_second);
if (ref_minute != 0 || ref_second != 0) {
fprintf(stderr,"unexected CFSv2 minute/second value != 0\n");
return 0;
}
if (fcst_time_0 != 0) { // start at day=1 hour=save->hour0 of proper month
fcst0_year = ref_year;
fcst0_month = ref_month + fcst_time_0;
if (fcst0_month > 12) {
i = (fcst0_month - 1) / 12;
fcst0_year += i;
fcst0_month -= (i*12);
}
fcst0_day = 1;
fcst0_hour = save->hour0;
fcst0_minute = 0;
fcst0_second= 0;
}
else { // start at current month
fcst0_year = ref_year;
fcst0_month = ref_month;
fcst0_day = ref_day;
fcst0_hour = ref_hour;
fcst0_minute = ref_minute;
fcst0_second= ref_second;
if (save->dt == 24) {
i = save->hour0 - fcst0_hour;
if (i < 0) i += 24;
add_time(&fcst0_year, &fcst0_month, &fcst0_day, &fcst0_hour, &fcst0_minute, &fcst0_second, i, HOUR);
}
}
sub_time(fcst0_year, fcst0_month, fcst0_day, fcst0_hour, fcst0_minute, fcst0_second,
ref_year, ref_month, ref_day, ref_hour, ref_minute, ref_second,
&dtime, &unit);
// set forecast time.
if (dtime == 0) unit = MONTH;
sec[4][17] = unit;
int_char(dtime, sec[4]+18);
if (fcst_time_1 == 0) fatal_error("fix-CFSv2_fcst: unexpected end_ft","");
if (save->dt == 6) { // ends at 18Z of last day of month
fcst1_year = ref_year;
fcst1_month = ref_month + fcst_time_1-1;
if (fcst1_month > 12) {
i = (fcst1_month - 1) / 12;
fcst1_year += i;
fcst1_month -= (i*12);
}
fcst1_day = num_days_in_month(fcst1_year, fcst1_month);
fcst1_hour = 18;
fcst1_minute = 0;
fcst1_second= 0;
// time increment = 6 hours
sec[4][53] = (unsigned char) HOUR;
int_char(6, sec[4]+54);
}
else {
fcst1_year = ref_year;
fcst1_month = ref_month + fcst_time_1-1;
if (fcst1_month > 12) {
i = (fcst1_month - 1) / 12;
fcst1_year += i;
fcst1_month -= (i*12);
}
fcst1_day = num_days_in_month(fcst1_year, fcst1_month);
fcst1_hour = save->hour0;
fcst1_minute = 0;
fcst1_second= 0;
// time increment = 24 hours
sec[4][53] = (unsigned char) HOUR;
int_char(24, sec[4]+54);
}
// find stat processing time
sub_time(fcst1_year, fcst1_month, fcst1_day, fcst1_hour, fcst1_minute, fcst1_second,
fcst0_year, fcst0_month, fcst0_day, fcst0_hour, fcst0_minute, fcst0_second,
&dtime, &unit);
// change length of processing
sec[4][48] = (unsigned char) unit;
int_char(dtime, sec[4]+49);
// fprintf(stderr,"length of processing %d unit (%d)\n", dtime, unit);
// save end-of-processing time
save_time(fcst1_year, fcst1_month, fcst1_day, fcst1_hour, fcst1_minute, fcst1_second, sec[4]+34);
// make sure that some basic info is correct
sec[4][47] = 2; // fcst_time++
// now to add ensemble information
for (i = 0; i < 34; i++) new_sec4[i] = sec[4][i];
for (i = 34; i <= 57; i++) new_sec4[i+3] = sec[4][i];
uint_char(61, new_sec4); // length of new sec[4[
new_sec4[7] = 0; // pdt = 11
new_sec4[8] = 11;
// add perturbation info
if (save->pert == 0) { // pert == 0 means control forecast
new_sec4[34] = 0;
new_sec4[35] = 0;
}
else {
new_sec4[34] = 3;
new_sec4[35] = save->pert;
}
new_sec4[35] = save->num_ensemble_members;
sec[4] = new_sec4;
save->fixed = save->fixed + 1;
return 0;
}
