long calc_daynr(uint year,uint month,uint day)
{
long delsum;
int temp;
if (year == 0 && month == 0 && day == 0)
DBUG_RETURN(0); /* Skip errors */
if (year < YY_MAGIC_BELOW)//200
{
if ((year=year+1900) < 1900+YY_PART_YEAR)//70
year+=100;
}
delsum= (long) (365L * year+ 31*(month-1) +day);
if (month <= 2)
year--;
else
delsum-= (long) (month*4+23)/10;
temp=(int) ((year/100+1)*3)/4;
return (delsum+(int) year/4-temp);
} /* calc_daynr */