//公曆轉農曆(1901-2100)
//亦木明 2008.1.11
#include<stdio.h>
//#include "ds1302.h"
#include "lunar.h"
#define uchar unsigned char
#define TRUE  1
//公歷年對應的農歷數據,每年三字節,
//格式第一字節BIT7-4 位表示閏月月份,值為0 為無閏月,BIT3-0 對應農歷第1-4 月的大小
//第二字節BIT7-0 對應農歷第5-12 月大小,第三字節BIT7 表示農歷第13 個月大小
//月份對應的位為1 表示本農歷月大(30 天),為0 表示小(29 天).
//第三字節BIT6-5 表示春節的公歷月份,BIT4-0 表示春節的公歷日期
//每年的數據對應在數組中的位置庫 (200-(2100-year)-1)*3+Offset1  
//0x09,0x2d,0x47, //2008  0x47 01000111
//0x4d,0x4A,0xB8, //2001


uchar code Data[]={

0x04,0xAe,0x53, //1901  0	(200-(2100-1901)-1)*3=0
0x0A,0x57,0x48, //1902	3   (200-(2100-1902)-1)*3=3
0x55,0x26,0xBd, //1903	6	(200-(2100-1903)-1)*3=3
0x0d,0x26,0x50, //1904	9   (200-(2100-year)-1)*3 
0x0d,0x95,0x44, //1905	12	
0x46,0xAA,0xB9, //1906	15
0x05,0x6A,0x4d, //1907
0x09,0xAd,0x42, //1908
0x24,0xAe,0xB6, //1909
0x04,0xAe,0x4A, //1910
0x6A,0x4d,0xBe, //1911
0x0A,0x4d,0x52, //1912
0x0d,0x25,0x46, //1913
0x5d,0x52,0xBA, //1914
0x0B,0x54,0x4e, //1915
0x0d,0x6A,0x43, //1916
0x29,0x6d,0x37, //1917
0x09,0x5B,0x4B, //1918
0x74,0x9B,0xC1, //1919
0x04,0x97,0x54, //1920
0x0A,0x4B,0x48, //1921
0x5B,0x25,0xBC, //1922
0x06,0xA5,0x50, //1923
0x06,0xd4,0x45, //1924
0x4A,0xdA,0xB8, //1925
0x02,0xB6,0x4d, //1926
0x09,0x57,0x42, //1927
0x24,0x97,0xB7, //1928
0x04,0x97,0x4A, //1929
0x66,0x4B,0x3e, //1930
0x0d,0x4A,0x51, //1931
0x0e,0xA5,0x46, //1932
0x56,0xd4,0xBA, //1933
0x05,0xAd,0x4e, //1934
0x02,0xB6,0x44, //1935
0x39,0x37,0x38, //1936
0x09,0x2e,0x4B, //1937
0x7C,0x96,0xBf, //1938
0x0C,0x95,0x53, //1939
0x0d,0x4A,0x48, //1940
0x6d,0xA5,0x3B, //1941
0x0B,0x55,0x4f, //1942
0x05,0x6A,0x45, //1943
0x4A,0xAd,0xB9, //1944
0x02,0x5d,0x4d, //1945
0x09,0x2d,0x42, //1946
0x2C,0x95,0xB6, //1947
0x0A,0x95,0x4A, //1948
0x7B,0x4A,0xBd, //1949
0x06,0xCA,0x51, //1950
0x0B,0x55,0x46, //1951
0x55,0x5A,0xBB, //1952
0x04,0xdA,0x4e, //1953
0x0A,0x5B,0x43, //1954
0x35,0x2B,0xB8, //1955
0x05,0x2B,0x4C, //1956
0x8A,0x95,0x3f, //1957
0x0e,0x95,0x52, //1958
0x06,0xAA,0x48, //1959
0x7A,0xd5,0x3C, //1960
0x0A,0xB5,0x4f, //1961
0x04,0xB6,0x45, //1962
0x4A,0x57,0x39, //1963
0x0A,0x57,0x4d, //1964
0x05,0x26,0x42, //1965
0x3e,0x93,0x35, //1966
0x0d,0x95,0x49, //1967
0x75,0xAA,0xBe, //1968
0x05,0x6A,0x51, //1969
0x09,0x6d,0x46, //1970
0x54,0xAe,0xBB, //1971
0x04,0xAd,0x4f, //1972
0x0A,0x4d,0x43, //1973
0x4d,0x26,0xB7, //1974
0x0d,0x25,0x4B, //1975
0x8d,0x52,0xBf, //1976
0x0B,0x54,0x52, //1977
0x0B,0x6A,0x47, //1978
0x69,0x6d,0x3C, //1979
0x09,0x5B,0x50, //1980
0x04,0x9B,0x45, //1981
0x4A,0x4B,0xB9, //1982
0x0A,0x4B,0x4d, //1983
0xAB,0x25,0xC2, //1984
0x06,0xA5,0x54, //1985
0x06,0xd4,0x49, //1986
0x6A,0xdA,0x3d, //1987
0x0A,0xB6,0x51, //1988
0x09,0x37,0x46, //1989
0x54,0x97,0xBB, //1990
0x04,0x97,0x4f, //1991
0x06,0x4B,0x44, //1992
0x36,0xA5,0x37, //1993
0x0e,0xA5,0x4A, //1994
0x86,0xB2,0xBf, //1995
0x05,0xAC,0x53, //1996
0x0A,0xB6,0x47, //1997
0x59,0x36,0xBC, //1998
0x09,0x2e,0x50, //1999	 
0x0C,0x96,0x45, //2000
0x4d,0x4A,0xB8, //2001
0x0d,0x4A,0x4C, //2002
0x0d,0xA5,0x41, //2003
0x25,0xAA,0xB6, //2004
0x05,0x6A,0x49, //2005
0x7A,0xAd,0xBd, //2006
0x02,0x5d,0x52, //2007
0x09,0x2d,0x47, //2008
0x5C,0x95,0xBA, //2009
0x0A,0x95,0x4e, //2010
0x0B,0x4A,0x43, //2011
0x4B,0x55,0x37, //2012
0x0A,0xd5,0x4A, //2013
0x95,0x5A,0xBf, //2014
0x04,0xBA,0x53, //2015
0x0A,0x5B,0x48, //2016
0x65,0x2B,0xBC, //2017
0x05,0x2B,0x50, //2018
0x0A,0x93,0x45, //2019
0x47,0x4A,0xB9, //2020
0x06,0xAA,0x4C, //2021
0x0A,0xd5,0x41, //2022
0x24,0xdA,0xB6, //2023
0x04,0xB6,0x4A, //2024
0x69,0x57,0x3d, //2025
0x0A,0x4e,0x51, //2026
0x0d,0x26,0x46, //2027
0x5e,0x93,0x3A, //2028
0x0d,0x53,0x4d, //2029
0x05,0xAA,0x43, //2030
0x36,0xB5,0x37, //2031
0x09,0x6d,0x4B, //2032
0xB4,0xAe,0xBf, //2033
0x04,0xAd,0x53, //2034
0x0A,0x4d,0x48, //2035
0x6d,0x25,0xBC, //2036
0x0d,0x25,0x4f, //2037
0x0d,0x52,0x44, //2038
0x5d,0xAA,0x38, //2039
0x0B,0x5A,0x4C, //2040
0x05,0x6d,0x41, //2041
0x24,0xAd,0xB6, //2042
0x04,0x9B,0x4A, //2043
0x7A,0x4B,0xBe, //2044
0x0A,0x4B,0x51, //2045
0x0A,0xA5,0x46, //2046
0x5B,0x52,0xBA, //2047
0x06,0xd2,0x4e, //2048
0x0A,0xdA,0x42, //2049
0x35,0x5B,0x37, //2050
0x09,0x37,0x4B, //2051
0x84,0x97,0xC1, //2052
0x04,0x97,0x53, //2053
0x06,0x4B,0x48, //2054
0x66,0xA5,0x3C, //2055
0x0e,0xA5,0x4f, //2056
0x06,0xB2,0x44, //2057
0x4A,0xB6,0x38, //2058
0x0A,0xAe,0x4C, //2059
0x09,0x2e,0x42, //2060
0x3C,0x97,0x35, //2061
0x0C,0x96,0x49, //2062
0x7d,0x4A,0xBd, //2063
0x0d,0x4A,0x51, //2064
0x0d,0xA5,0x45, //2065
0x55,0xAA,0xBA, //2066
0x05,0x6A,0x4e, //2067
0x0A,0x6d,0x43, //2068
0x45,0x2e,0xB7, //2069
0x05,0x2d,0x4B, //2070
0x8A,0x95,0xBf, //2071
0x0A,0x95,0x53, //2072
0x0B,0x4A,0x47, //2073
0x6B,0x55,0x3B, //2074
0x0A,0xd5,0x4f, //2075
0x05,0x5A,0x45, //2076
0x4A,0x5d,0x38, //2077
0x0A,0x5B,0x4C, //2078
0x05,0x2B,0x42, //2079
0x3A,0x93,0xB6, //2080
0x06,0x93,0x49, //2081
0x77,0x29,0xBd, //2082
0x06,0xAA,0x51, //2083
0x0A,0xd5,0x46, //2084
0x54,0xdA,0xBA, //2085
0x04,0xB6,0x4e, //2086
0x0A,0x57,0x43, //2087
0x45,0x27,0x38, //2088
0x0d,0x26,0x4A, //2089
0x8e,0x93,0x3e, //2090
0x0d,0x52,0x52, //2091
0x0d,0xAA,0x47, //2092
0x66,0xB5,0x3B, //2093
0x05,0x6d,0x4f, //2094
0x04,0xAe,0x45, //2095
0x4A,0x4e,0xB9, //2096
0x0A,0x4d,0x4C, //2097
0x0d,0x15,0x41, //2098
0x2d,0x92,0xB5, //2099
0x0d,0x53,0x49, //2100
};

uchar code Mon1[2][13]={0,31,28,31,30,31,30,31,31,30,31,30,31,
				  0,31,29,31,30,31,30,31,31,30,31,30,31};



SPDATE Spdate;
//獲得當年春節的公曆日期
SPDATE GetSpringDay(uchar GreYear,uchar GreMon,uchar GreDay)
{
	//第三字節BIT6-5 表示春節的公歷月份,BIT4-0 表示春節的公歷日期
	//0x09,0x2d,0x47, //2008  0x47 01000111
	//Date SpDate;
//	uchar  Spdate.cYear;
//	uchar Spdate.cMon,Spdate.cDay;
    
	int day;
	
//	uchar Flag,F,i,Max,Min,MaxDay,MinDay;
    uchar i,Flag,F;

//	int  day;
	uchar Offset1;
	unsigned char L=0x01,Flag1=1;
	unsigned int  Temp16,L1=0x0800;

	Spdate.cYear=GreYear ;
	Spdate.cMon=(Data[(200-(100-GreYear)-1)*3+2]&0x60)>>5; //春節公歷月份
	Spdate.cDay=(Data[(200-(100-GreYear)-1)*3+2])&0x1f;    //春節公歷日期


	if( (!(GreYear%4) && (GreYear%100)) || !(GreYear%400) ) Flag=1; else Flag=0;
	
	if(Spdate.cMon>GreMon)								//春節離公歷日期的天數
	{
	   day=Mon1[Flag][GreMon]-GreDay;
	   for(i=GreMon+1;i<=Spdate.cMon-1;i++)
			day+=Mon1[Flag][i];
	   day+=Spdate.cDay;
	   F=1;
	}
	else if(Spdate.cMon<GreMon) //春節的月份小於目標的月份
	{
		day=Mon1[Flag][Spdate.cMon]-Spdate.cDay;  
		for(i=Spdate.cMon+1;i<=GreMon-1;i++)
			day+=Mon1[Flag][i];
		day+=GreDay;
	//	day=-day;
		F=0;
	}
	else
	{
		//if(Spdate.cDay!=GreDay) day=Spdate.cDay-GreDay; else day=0;
		if(Spdate.cDay>GreDay)
		{
			day=Spdate.cDay-GreDay;
			F=1;
		}
		else if(Spdate.cDay<GreDay)
		{
			day=GreDay-Spdate.cDay;
			F=0;
		}
		else day=0;
	}                 
//	return day;
//}

//獲得農曆日期
//void GetLunarDate(int IntlDay,Date SpDate)
//{

//	Date LunarDate;
//	day=day;

	Spdate.cYear=Spdate.cYear;
	Spdate.cMon=1;
	Spdate.cDay=1;

	if(!day) return Spdate ;

	if(F)    //春節在公歷日期后
	{
		Spdate.cYear--;
		Spdate.cMon=12;
		Offset1=(200-(100-Spdate.cYear)-1)*3;
		while(TRUE)
		{
			//格式第一字節BIT7-4 位表示閏月月份,值為0 為無閏月,BIT3-0 對應農歷第1-4 月的大小
			//第二字節BIT7-0 對應農歷第5-12 月大小,第三字節BIT7 表示農歷第13 個月大小
			//0x4d,0x4A,0xB8, //2001
			if(Data[Offset1+1]&L) 
			day-=30;
			else
			day-=29;
			L<<=1;
			if(((Data[Offset1+0]&0xf0)>>4)==Spdate.cMon && Flag1) 
			{
				Flag1=0;
				if(Data[Offset1+2]&0x80) day-=30; else day-=29;
				//day-=LYDay; 
				//if(day<0) break;
				continue;
			}
			if(day>0) Spdate.cMon--; else break;
			
			
		}
	//	if(Flag) LunarDate.Month++;
		Spdate.cDay=-day+1;
	}
	
	if(!F)
	{
	//	day=-day;
		//0x09,0x2d,0x47, //2008
		Spdate.cMon=1;
		Offset1=(200-(100-Spdate.cYear)-1)*3;
		Temp16=(Data[Offset1+0]<<8)+Data[Offset1+1];
		while(TRUE)
		{
			if(Temp16 & L1) day-=30; else day-=29;
			if(day>=0) 
				Spdate.cMon++; 
			else if(day<0)
			{
				if(Temp16 & L1) day+=30; else day+=29;
				break;
			}
			L1>>=1;
			//格式第一字節BIT7-4 位表示閏月月份,值為0 為無閏月,BIT3-0 對應農歷第1-4 月的大小
			//第二字節BIT7-0 對應農歷第5-12 月大小,第三字節BIT7 表示農歷第13 個月大小
			if(((Data[Offset1+0]&0xf0)>>4)==(Spdate.cMon-1) && Flag1) //閏月
			{
				Flag1=0;
				Spdate.cMon--;
				if(Temp16 & L1) day-=30; else day-=29;
				if(day>=0) 
					Spdate.cMon++; 
				else if(day<0)
				{
					if(Temp16 & L1) day+=30; else day+=29;
					break;
				}
				L1>>1;
			}
			//Temp16=
		}
		//LunarDate.Month--;
		Spdate.cDay=day+1;
	}
 //   printf("%d %d %d",Spdate.cYear,Spdate.cMon,Spdate.cDay);
//	return LunarDate;
    return Spdate;
}

bit YearFlag(uchar cYear)
{
   if( (!(cYear%4) && (cYear%100)) || !(cYear%400) ) return 1; else return 0;
}

//目標日期是星期幾
uchar GetWeekDay(uchar cYear,uchar cMon,uchar cDay)
{
	char i;
	int  Sum=0,tmpyear=2000+cYear;
	
	//if( (!(GreDate.Year%4) && (GreDate.Year%100)) || !(GreDate.Year%400) ) Flag=1; else Flag=0;
	
	for(i=1;i<=cMon-1;i++)
		Sum+=Mon1[YearFlag(cYear)][i];
	Sum+=cDay-1;
	
	return (((tmpyear-1)+(tmpyear-1)/4-(tmpyear-1)/100+(tmpyear-1)/400+Sum)%7)+1;
}



/*****************************************************************************

首先要能記住十大天干和十二地支，
十天干：  甲、乙、丙、丁、戊、己、庚、辛、壬、癸；
十二地支：子、丑、寅、卯、辰、巳、午、未、申、酉、戌、亥；
 
天干地支紀年法首先是天干在前，地支在后，比如今年2005就為－乙酉年，先來算算天干，
有個公式： 
4、 5、 6、 7、 8、 9、 0、 1、 2、 3 對應的十天干就是 
甲、乙、丙、丁、戊、己、庚、辛、壬、癸， 
數字為年代的最后的一位數字，比如今年是2005，最后一位是5，對應的天干就是乙； 

地支的算法：用年代數除以12，后面的余數就代表某個地支，
余數分別為：4、 5、 6、 7、 8、 9、 10、 11、 0（能整除）、1、 2、3.
代表地支為：子、丑、寅、卯、辰、巳、午、 未、 申、酉、戌、亥.
比如2005年為例：年代末尾數為5，對應的天干為乙，2005除以12，余數為1，對應的地支為酉，所以2005年為乙酉年。

******************************************************************************/