public static Lunar SolarToLunar(Solar solar)
{
var lunar = new Lunar();
int index = solar.solarYear - solar_1_1[0];
int data = (solar.solarYear << 9) | (solar.solarMonth << 5) | (solar.solarDay);
int solar11 = 0;
if (solar_1_1[index] > data)
{
index--;
}
solar11 = solar_1_1[index];
int y = GetBitInt(solar11, 12, 9);
int m = GetBitInt(solar11, 4, 5);
int d = GetBitInt(solar11, 5, 0);
long offset = SolarToInt(solar.solarYear, solar.solarMonth, solar.solarDay) - SolarToInt(y, m, d);
int days = lunar_month_days[index];
int leap = GetBitInt(days, 4, 13);
int lunarY = index + solar_1_1[0];
int lunarM = 1;
int lunarD = 1;
offset += 1;
for (int i = 0; i < 13; i++)
{
int dm = GetBitInt(days, 1, 12 - i) == 1 ? 30 : 29;
if (offset > dm)
{
lunarM++;
offset -= dm;
}
else
{
break;
}
}
lunarD = (int)(offset);
lunar.lunarYear = lunarY;
lunar.lunarMonth = lunarM;
lunar.isleap = false;
if (leap != 0 && lunarM > leap)
{
lunar.lunarMonth = lunarM - 1;
if (lunarM == leap + 1)
{
lunar.isleap = true;
}
}
lunar.lunarDay = lunarD;
return(lunar);
}