lyfz_repos/经典版源码/lyfzClient/branches/715/CalendarEx.cpp

#include "stdafx.h"
#include "CalendarEx.h"


static const int BEGIN_YEAR = 1901;
static const int NUMBER_YEAR = 199;

//使用比特位记录每年的情况
//0~4 共5bit 春节号数;
//5~6 共2bit 春节月份
//7~19 共13bit 13个月的大小月情况(如果无闰月，最后位无效)，大月为1,小月为0
//20~23 共4bit 记录闰月的月份，如果没有闰月为0

//0x955ABF	2014年, 农9月有闰月, 公历1月31号为春节;
//   1001        0101010110101     01          11111
// 闰月月份       7-19.13个月     春月       春节日期;

////1001 0101010110101  01    11111

//0X252ABF
//1001010010101010111111

static const unsigned int LUNAR_YEARS[199] =
{
	0x04AE53, 0x0A5748, 0x5526BD, 0x0D2650, 0x0D9544, 0x46AAB9, 0x056A4D, 0x09AD42, 0x24AEB6, 0x04AE4A, //1901-1910
	0x6A4DBE, 0x0A4D52, 0x0D2546, 0x5D52BA, 0x0B544E, 0x0D6A43, 0x296D37, 0x095B4B, 0x749BC1, 0x049754, //1911-1920
	0x0A4B48, 0x5B25BC, 0x06A550, 0x06D445, 0x4ADAB8, 0x02B64D, 0x095742, 0x2497B7, 0x04974A, 0x664B3E, //1921-1930
	0x0D4A51, 0x0EA546, 0x56D4BA, 0x05AD4E, 0x02B644, 0x393738, 0x092E4B, 0x7C96BF, 0x0C9553, 0x0D4A48, //1931-1940
	0x6DA53B, 0x0B554F, 0x056A45, 0x4AADB9, 0x025D4D, 0x092D42, 0x2C95B6, 0x0A954A, 0x7B4ABD, 0x06CA51, //1941-1950
	0x0B5546, 0x555ABB, 0x04DA4E, 0x0A5B43, 0x352BB8, 0x052B4C, 0x8A953F, 0x0E9552, 0x06AA48, 0x7AD53C, //1951-1960
	0x0AB54F, 0x04B645, 0x4A5739, 0x0A574D, 0x052642, 0x3E9335, 0x0D9549, 0x75AABE, 0x056A51, 0x096D46, //1961-1970
	0x54AEBB, 0x04AD4F, 0x0A4D43, 0x4D26B7, 0x0D254B, 0x8D52BF, 0x0B5452, 0x0B6A47, 0x696D3C, 0x095B50, //1971-1980
	0x049B45, 0x4A4BB9, 0x0A4B4D, 0xAB25C2, 0x06A554, 0x06D449, 0x6ADA3D, 0x0AB651, 0x093746, 0x5497BB, //1981-1990
	0x04974F, 0x064B44, 0x36A537, 0x0EA54A, 0x86B2BF, 0x05AC53, 0x0AB647, 0x5936BC, 0x092E50, 0x0C9645, //1991-2000
	0x4D4AB8, 0x0D4A4C, 0x0DA541, 0x25AAB6, 0x056A49, 0x7AADBD, 0x025D52, 0x092D47, 0x5C95BA, 0x0A954E, //2001-2010
	0x0B4A43, 0x4B5537, 0x0AD54A, 0x955ABF, 0x04BA53, 0x0A5B48, 0x652BBC, 0x052B50, 0x0A9345, 0x474AB9, //2011-2020
	0x06AA4C, 0x0AD541, 0x24DAB6, 0x04B64A, 0x69573D, 0x0A4E51, 0x0D2646, 0x5E933A, 0x0D534D, 0x05AA43, //2021-2030
	0x36B537, 0x096D4B, 0xB4AEBF, 0x04AD53, 0x0A4D48, 0x6D25BC, 0x0D254F, 0x0D5244, 0x5DAA38, 0x0B5A4C, //2031-2040
	0x056D41, 0x24ADB6, 0x049B4A, 0x7A4BBE, 0x0A4B51, 0x0AA546, 0x5B52BA, 0x06D24E, 0x0ADA42, 0x355B37, //2041-2050
	0x09374B, 0x8497C1, 0x049753, 0x064B48, 0x66A53C, 0x0EA54F, 0x06B244, 0x4AB638, 0x0AAE4C, 0x092E42, //2051-2060
	0x3C9735, 0x0C9649, 0x7D4ABD, 0x0D4A51, 0x0DA545, 0x55AABA, 0x056A4E, 0x0A6D43, 0x452EB7, 0x052D4B, //2061-2070
	0x8A95BF, 0x0A9553, 0x0B4A47, 0x6B553B, 0x0AD54F, 0x055A45, 0x4A5D38, 0x0A5B4C, 0x052B42, 0x3A93B6, //2071-2080
	0x069349, 0x7729BD, 0x06AA51, 0x0AD546, 0x54DABA, 0x04B64E, 0x0A5743, 0x452738, 0x0D264A, 0x8E933E, //2081-2090
	0x0D5252, 0x0DAA47, 0x66B53B, 0x056D4F, 0x04AE45, 0x4A4EB9, 0x0A4D4C, 0x0D1541, 0x2D92B5 //2091-2099
};


CCalendarEx::CCalendarEx()
{
}


CCalendarEx::~CCalendarEx()
{
}

bool CCalendarEx::IsValidLunanrDate(int lunar_year, int lunar_month, int lunar_day)
{
	//越界检查，如果越界，返回无效日期;
	if (lunar_year <= BEGIN_YEAR || lunar_year > BEGIN_YEAR + NUMBER_YEAR - 1)
		return FALSE;

	if (lunar_month < 1 || lunar_month > 12)
		return FALSE;

	// 1.农历年是否有闰月;
	int nYearIndex = lunar_year - BEGIN_YEAR;
	int leap_month = (LUNAR_YEARS[nYearIndex] >> 20) & 0xF;

	// 2.月份大小月天数;
	int month_day = 0;
	if ((LUNAR_YEARS[nYearIndex] >> (7 + 13 - lunar_month)) & 0x1)
		month_day = 30;
	else
		month_day = 29;

	if (lunar_day < 0 || lunar_day > month_day)
		return FALSE;

	return TRUE;
}

//计算这个公历日期是一年中的第几天
int CCalendarEx::DayOfSolarYear(int year, int month, int day)
{
	//为了提高效率，记录每月一日是一年中的第几天;
	static const int NORMAL_YDAY[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
	//闰年的情况;
	static const int LEAP_YDAY[12] = { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 };

	const int *t_year_yday_ = NORMAL_YDAY;

	//判断是否是公历闰年;
	if (year % 4 == 0)
	{
		if (year % 100 != 0)
			t_year_yday_ = LEAP_YDAY;
		if (year % 400 == 0)
			t_year_yday_ = LEAP_YDAY;
	}
	return t_year_yday_[month - 1] + day;
}

Date CCalendarEx::SolarToLuanrDate(int solar_year, int solar_month, int solar_day)
{
	Date luanr_date;
	luanr_date.year = solar_year;
	luanr_date.month = 0;
	luanr_date.day = 0;
	luanr_date.leap = false;

	//越界检查，如果越界，返回无效日期;
	if (solar_year <= BEGIN_YEAR || solar_year > BEGIN_YEAR + NUMBER_YEAR - 1)
		return luanr_date;

	int year_index = solar_year - BEGIN_YEAR;

	//计算春节的公历日期;
	int spring_ny_month = (LUNAR_YEARS[year_index] & 0x60) >> 5;
	int spring_ny_day = (LUNAR_YEARS[year_index] & 0x1F);

	//计算今天是公历年的第几天;
	int today_solar_yd = DayOfSolarYear(solar_year, solar_month, solar_day);

	//计算春节是公历年的第几天;
	int spring_ny_yd = DayOfSolarYear(solar_year, spring_ny_month, spring_ny_day);

	//计算今天是农历年的第几天 = 农历今天在的公历第几天 - 今年农历春节在公历的第几天;
	int today_luanr_yd = today_solar_yd - spring_ny_yd + 1;

	//如果今天在春节的前面，重新计算today_luanr_yd;
	if (today_luanr_yd <= 0)
	{
		//农历年比当前公历年小1;
		year_index--;
		luanr_date.year--;

		//越界，返回无效日期;
		if (year_index < 0)
			return luanr_date;

		// 去年农历春节月;
		spring_ny_month = (LUNAR_YEARS[year_index] & 0x60) >> 5;
		// 去年农历春节日;
		spring_ny_day = (LUNAR_YEARS[year_index] & 0x1F);
		// 去年公历年共多少天;
		int year_total_day = DayOfSolarYear(luanr_date.year, 12, 31);

		spring_ny_yd = DayOfSolarYear(solar_year, spring_ny_month, spring_ny_day);
		// 计算今天是农历年的第几天;
		today_luanr_yd = today_solar_yd + year_total_day - spring_ny_yd + 1;
	}

	int luanr_month = 1;

	//计算月份和日期;
	for (; luanr_month <= 13; luanr_month++)
	{
		int month_day = 29;
		if ((LUNAR_YEARS[year_index] >> (7 + 13 - luanr_month)) & 0x1)
			month_day = 30;
		if (today_luanr_yd <= month_day)
			break;
		else
			today_luanr_yd -= month_day;
	}

	luanr_date.day = today_luanr_yd;

	//处理闰月;
	int leap_month = (LUNAR_YEARS[year_index] >> 20) & 0xf;
	if (leap_month > 0 && leap_month < luanr_month)
	{
		luanr_month--;

		//如果当前月为闰月，设置闰月标志;
		if (luanr_month == leap_month)
			luanr_date.leap = true;
	}
	assert(leap_month <= 12);
	luanr_date.month = luanr_month;
	return luanr_date;
}

CString CCalendarEx::GetLunarDate(int solar_year, int solar_month, int solar_day)
{
	Date luanr_date;
	luanr_date.year = solar_year;
	luanr_date.month = 0;
	luanr_date.day = 0;
	luanr_date.leap = false;

	//越界检查，如果越界，返回无效日期;
	if (solar_year <= BEGIN_YEAR || solar_year > BEGIN_YEAR + NUMBER_YEAR - 1)
		return _T("1900-01-01");

	int year_index = solar_year - BEGIN_YEAR;

	//计算春节的公历日期;
	int spring_ny_month = (LUNAR_YEARS[year_index] & 0x60) >> 5;
	int spring_ny_day = (LUNAR_YEARS[year_index] & 0x1F);

	//计算今天是公历年的第几天;
	int today_solar_yd = DayOfSolarYear(solar_year, solar_month, solar_day);

	//计算春节是公历年的第几天;
	int spring_ny_yd = DayOfSolarYear(solar_year, spring_ny_month, spring_ny_day);

	//计算今天是农历年的第几天 = 农历今天在的公历第几天 - 今年农历春节在公历的第几天;
	int today_luanr_yd = today_solar_yd - spring_ny_yd + 1;

	//如果今天在春节的前面，重新计算today_luanr_yd;
	if (today_luanr_yd <= 0)
	{
		//农历年比当前公历年小1;
		year_index--;
		luanr_date.year--;

		//越界，返回无效日期;
		if (year_index < 0)
			return _T("1900-01-01");

		// 去年农历春节月;
		spring_ny_month = (LUNAR_YEARS[year_index] & 0x60) >> 5;
		// 去年农历春节日;
		spring_ny_day = (LUNAR_YEARS[year_index] & 0x1F);
		// 去年公历年共多少天;
		int year_total_day = DayOfSolarYear(luanr_date.year, 12, 31);

		spring_ny_yd = DayOfSolarYear(solar_year, spring_ny_month, spring_ny_day);
		// 计算今天是农历年的第几天;
		today_luanr_yd = today_solar_yd + year_total_day - spring_ny_yd + 1;
	}

	int luanr_month = 1;

	//计算月份和日期;
	for (; luanr_month <= 13; luanr_month++)
	{
		int month_day = 29;
		if ((LUNAR_YEARS[year_index] >> (7 + 13 - luanr_month)) & 0x1)
			month_day = 30;
		if (today_luanr_yd <= month_day)
			break;
		else
			today_luanr_yd -= month_day;
	}

	luanr_date.day = today_luanr_yd;

	//处理闰月;
	int leap_month = (LUNAR_YEARS[year_index] >> 20) & 0xf;
	if (leap_month > 0 && leap_month < luanr_month)
	{
		luanr_month--;

		//如果当前月为闰月，设置闰月标志;
		if (luanr_month == leap_month)
			luanr_date.leap = true;
	}
	assert(leap_month <= 12);
	luanr_date.month = luanr_month;

	CString strSolarDate;
	strSolarDate.Format(_T("%04d-%02d-%02d"), luanr_date.year, luanr_date.month, luanr_date.day);

	return strSolarDate;
}

CString CCalendarEx::LuanrToSolarDate(int lunar_year, int lunar_month, int lunar_day, BOOL bLeap/*=FALSE*/)
{
	//越界检查，如果越界，返回无效日期;
	if (lunar_year <= BEGIN_YEAR || lunar_year > BEGIN_YEAR + NUMBER_YEAR - 1)
		return _T("");

	// 1.判断该农历年是否有闰月;
	int nYearIndex = lunar_year - BEGIN_YEAR;
	int leap_month = (LUNAR_YEARS[nYearIndex] >> 20) & 0xF;

	CString strSolarDate = _T("1900-01-01");
	COleDateTime Solar;
	Solar.SetDateTime(lunar_year, lunar_month, lunar_day, 0, 0, 0);
	COleDateTimeSpan Span(1, 0, 0, 0);

	Date Luanr_date;
	for (int i = 0; i < 120; i++)
	{
		Luanr_date = SolarToLuanrDate(Solar.GetYear(), Solar.GetMonth(), Solar.GetDay());
		if (Luanr_date.year == lunar_year && Luanr_date.month == lunar_month && Luanr_date.day == lunar_day)
		{
			if (bLeap && leap_month == lunar_month)
			{
				bLeap = FALSE;
				Solar += Span;
				continue;
			}
			else
			{
				strSolarDate.Format(_T("%4d-%02d-%02d"), Solar.GetYear(), Solar.GetMonth(), Solar.GetDay());
				break;
			}
		}
		Solar += Span;
	}

	// 如果没有找,那么就没有这个农历日期;2012-06-30号,这个是不存在的农历日期.
	// 不存在,则返回1900-01-01这个初值：设置strSolarDate = _T("1900-01-01");
	return strSolarDate;
}