公历转农历.txt

ourdev_479323

c_sun,year_sun,month_sun,day_sun均为BCD数据,c_sun为世纪标志位,c_sun=0为21世
纪,c_sun=1为19世纪
调用函数后,原有数据不变,读c_moon,year_moon,month_moon,day_moon得出阴历BCD数据
*/
bit c_moon;
data uchar year_moon,month_moon,day_moon,week;
/*子函数,用于读取数据表中农历月的大月或小月,如果该月为大返回1,为小返回0*/
bit get_moon_day(uchar month_p,uint table_addr)
{
uchar temp;
    switch (month_p){
        case 1:{temp=year_code[table_addr]&0x08;
             if (temp==0)return(0);else return(1);}
        case 2:{temp=year_code[table_addr]&0x04;
             if (temp==0)return(0);else return(1);}
        case 3:{temp=year_code[table_addr]&0x02;
             if (temp==0)return(0);else return(1);}
        case 4:{temp=year_code[table_addr]&0x01;
             if (temp==0)return(0);else return(1);}
        case 5:{temp=year_code[table_addr+1]&0x80;
             if (temp==0) return(0);else return(1);}
        case 6:{temp=year_code[table_addr+1]&0x40;
             if (temp==0)return(0);else return(1);}
        case 7:{temp=year_code[table_addr+1]&0x20;
             if (temp==0)return(0);else return(1);}
        case 8:{temp=year_code[table_addr+1]&0x10;
             if (temp==0)return(0);else return(1);}
        case 9:{temp=year_code[table_addr+1]&0x08;
             if (temp==0)return(0);else return(1);}
        case 10:{temp=year_code[table_addr+1]&0x04;
             if (temp==0)return(0);else return(1);}
        case 11:{temp=year_code[table_addr+1]&0x02;
             if (temp==0)return(0);else return(1);}
        case 12:{temp=year_code[table_addr+1]&0x01;
             if (temp==0)return(0);else return(1);}
        case 13:{temp=year_code[table_addr+2]&0x80;
             if (temp==0)return(0);else return(1);}
    }
}
/*
函数功能:输入BCD阳历数据,输出BCD阴历数据(只允许1901-2099年)
调用函数示例:Conversion(c_sun,year_sun,month_sun,day_sun)
如:计算2004年10月16日Conversion(0,0x4,0x10,0x16);
c_sun,year_sun,month_sun,day_sun均为BCD数据,c_sun为世纪标志位,c_sun=0为21世
纪,c_sun=1为19世纪
调用函数后,原有数据不变,读c_moon,year_moon,month_moon,day_moon得出阴历BCD数据
*/
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%16;
    year=temp1*10+temp2;
    temp1=month/16;
    temp2=month%16;
    month=temp1*10+temp2;
    temp1=day/16;
    temp2=day%16;
    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; //
        /*
        month_p为月份指向,如果当年有闰月,一年有十三个月,月指向13,
无闰月指向12
        */
        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%10;
    year_moon=temp1|temp2;
    temp1=month/10;
    temp1=_crol_(temp1,4);
    temp2=month%10;
    month_moon=temp1|temp2;
    temp1=day/10;
    temp1=_crol_(temp1,4);
    temp2=day%10;
    day_moon=temp1|temp2;
}
void nl()
{
 unsigned char   yy1,yy2;
 Conversion(0,yy,mo,dd);
 LCM_WriteDatOrCom(0,0x90);
 LCM_WriteString("农历");//原代码为
 LCM_WriteDatOrCom(1,year_moon/16+'0');
 LCM_WriteDatOrCom(1,year_moon%16+'0');
 LCM_WriteDatOrCom(1,'-');
 LCM_WriteDatOrCom(1,month_moon/16+'0');
 LCM_WriteDatOrCom(1,month_moon%16+'0');
 LCM_WriteDatOrCom(1,'-');
 LCM_WriteDatOrCom(1,day_moon/16+'0');
 LCM_WriteDatOrCom(1,day_moon%16+'0');
 yy1=(year_moon/16)*10+year_moon%16;
 yy2=yy1%12;
 switch(yy2)
 {
  case 0: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("龙");
          break;
  case 1: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("蛇");
          break;
  case 2: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("马");
          break;
  case 3: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("羊");
          break;
  case 4: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("猴");
          break;
  case 5: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("鸡");
          break;
  case 6: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("狗");
          break;
  case 7: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("猪");
          break;
  case 8: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("鼠");
          break;
  case 9: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("牛");
          break;
  case 10: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("虎");
          break;
  case 11: LCM_WriteDatOrCom(0,0x87);LCM_WriteString("兔");
          break;
 }
}