bit get_moon_day(uchar month_p,uint table_addr)
{
unsigned char temp;
switch (month_p){
case 1:{if(year_code[table_addr]&0x08 == 0) return(0);
else return(1);}
case 2:{if(year_code[table_addr]&0x04 == 0) return(0);
else return(1);}
case 3:{if(year_code[table_addr]&0x02 == 0) return(0);
else return(1);}
case 4:{if(year_code[table_addr]&0x01 == 0) return(0);
else return(1);}
case 5:{if(year_code[table_addr+1]&0x80 == 0) return(0);
else return(1);}
case 6:{if(year_code[table_addr+1]&0x40 == 0) return(0);
else return(1);}
case 7:{if(year_code[table_addr+1]&0x20 == 0) return(0);
else return(1);}
case 8:{if(year_code[table_addr+1]&0x10 == 0) return(0);
else return(1);}
case 9:{if(year_code[table_addr+1]&0x08 == 0) return(0);
else return(1);}
case 10:{if(year_code[table_addr+1]&0x04 == 0) return(0);
else return(1);}
case 11:{if(year_code[table_addr+1]&0x02 == 0) return(0);
else return(1);}
case 12:{if(year_code[table_addr+1]&0x01 == 0) return(0);
else return(1);}
case 13:{temp=year_code[table_addr+2]&0x80;
if (temp==0)return(0);else return(1);}
}
}
void Conversion(bit c,uchar year,uchar month,uchar day)
{
//c=0 为21世纪,c=1 为19世纪 输入输出数据均为BCD数据
uchar temp1,temp2,temp3,month_p;
uint temp4,table_addr;
bit flag2,flag_y;
temp1=year/16;
//BCD->hex 先把数据转换为十六进制
temp2=year;
year=temp1*10+temp2;
temp1=month/16;
temp2=month;
month=temp1*10+temp2;
temp1=day/16;
temp2=day;
day=temp1*10+temp2;
//定位数据表地址
if(c==0){
table_addr=(year+0x64-1)*0x3;
}
else {
table_addr=(year-1)*0x3;
}
//定位数据表地址完成
//取当年春节所在的公历月份
temp1=year_code[table_addr+2]&0x60;
temp1=_cror_(temp1,5);
//取当年春节所在的公历月份完成
//取当年春节所在的公历日
temp2=year_code[table_addr+2]&0x1f;
//取当年春节所在的公历日完成
// 计算当年春年离当年元旦的天数,春节只会在公历1月或2月
if(temp1==0x1){
temp3=temp2-1;
}
else{
temp3=temp2+0x1f-1;
}
// 计算当年春年离当年元旦的天数完成
//计算公历日离当年元旦的天数,为了减少运算,用了两个表
//day_code1[9],day_code2[3]
//如果公历月在九月或前,天数会少于0xff,用表day_code1[9],
//在九月后,天数大于0xff,用表day_code2[3]
//如输入公历日为8月10日,则公历日离元旦天数为day_code1[8-1]+10-1
//如输入公历日为11月10日,则公历日离元旦天数为day_code2[11-10]+10-1
if (month<10){
temp4=day_code1[month-1]+day-1;
}
else{
temp4=day_code2[month-10]+day-1;
}
if ((month>0x2)&&(year%0x4==0)){
//如果公历月大于2月并且该年的2月为闰月,天数加1
temp4+=1;
}
//计算公历日离当年元旦的天数完成
//判断公历日在春节前还是春节后
if (temp4>=temp3){ //公历日在春节后或就是春节当日使用下面代码进行运算
temp4-=temp3;
month=0x1;
month_p=0x1;
//month_p为月份指向,公历日在春节前或就是春节当日month_p指向首月
flag2=get_moon_day(month_p,table_addr); //检查该农历月为大小还是小月,大月返回1,小月返回0
flag_y=0;
if(flag2==0)temp1=0x1d; //小月29天
else temp1=0x1e; //大小30天
temp2=year_code[table_addr]&0xf0;
temp2=_cror_(temp2,4);
//从数据表中取该年的闰月月份,如为0则该年无闰月
while(temp4>=temp1){
temp4-=temp1;
month_p+=1;
if(month==temp2){
flag_y=~flag_y;
if(flag_y==0)month+=1;
}
else month+=1;
flag2=get_moon_day(month_p,table_addr);
if(flag2==0)temp1=0x1d;
else temp1=0x1e;
}
day=temp4+1;
}
else{
//公历日在春节前使用下面代码进行运算
temp3-=temp4;
if (year==0x0){year=0x63;c=1;}
else year-=1;
table_addr-=0x3;
month=0xc;
temp2=year_code[table_addr]&0xf0;
temp2=_cror_(temp2,4);
if (temp2==0)month_p=0xc;
else month_p=0xd; //
flag_y=0;
flag2=get_moon_day(month_p,table_addr);
if(flag2==0)temp1=0x1d;
else temp1=0x1e;
while(temp3>temp1){
temp3-=temp1;
month_p-=1;
if(flag_y==0)month-=1;
if(month==temp2)flag_y=~flag_y;
flag2=get_moon_day(month_p,table_addr);
if(flag2==0)temp1=0x1d;
else temp1=0x1e;
}
day=temp1-temp3+1;
}
c_moon=c;
//HEX->BCD ,运算结束后,把数据转换为BCD数据
temp1=year/10;
temp1=_crol_(temp1,4);
temp2=year;
year_moon=temp1|temp2;
temp1=month/10;
temp1=_crol_(temp1,4);
temp2=month;
month_moon=temp1|temp2;
temp1=day/10;
temp1=_crol_(temp1,4);
temp2=day;
day_moon=temp1|temp2;
}
code uchar table_week[12]={0,3,3,6,1,4,6,2,5,0,3,5}; //月修正数据表
void Conver_week(bit c,uchar year,uchar month,uchar day)
{//c=0 为21世纪,c=1 为19世纪 输入输出数据均为BCD数据
uchar temp1,temp2;
temp1=year/16;
//BCD->hex 先把数据转换为十六进制
temp2=year;
year=temp1*10+temp2;
temp1=month/16;
temp2=month;
month=temp1*10+temp2;
temp1=day/16;
temp2=day;
day=temp1*10+temp2;
if (c==0){year+=0x64;}
//如果为21世纪,年份数加100
temp1=year/0x4;
//所过闰年数只算1900年之后的
temp2=year+temp1;
temp2=temp2%0x7;
//为节省资源,先进行一次取余,避免数大于0xff,避免使用整型数据
temp2=temp2+day+table_week[month-1];
if (year%0x4==0&&month<3)temp2-=1;
week=temp2%0x7;
}
//test
uchar c_sun,year_sun,month_sun,day_sun;
void main(){
c_sun=1;
year_sun=0x2;
month_sun=0x11;
day_sun=0x3;
Conver_week(c_sun,year_sun,month_sun,day_sun);
Conversion(c_sun,year_sun,month_sun,day_sun);
while(1);
}
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