- /*
- 西历农历转换程式 C 语言代码
- prototype: int CalConv( struct ConvDate * );
- struct ConvDate
- {
- int Source; ==0 则输入日期为西历, !=0 则输入为农历
- int SolarYear; 输出或输入之西历年份
- int SolarMonth; 西历月
- int SolarDate; 西历日
- int LunarYear; 输出或输入之农历年份
- int LunarMonth; 农历月
- int LunarDate; 农历日
- int Weekday; 该日为星期几 ( 0==星期日, 1==星期一, ... )
- int Kan; 该日天干 ( 0==甲, 1==乙, ..., 9==癸 )
- int Chih; 该日地支 ( 0==子, 1==丑, ..., 11==亥 )
- };
- 呼叫时须设定 Souce 的值, 若为 0 则为西历转农历, 否则为农历转西历. 然後视
- 输入为西历或农历来设定西历或农历的年月日. 转换後的年月日会填入结构中( 农
- 历或西历 ), 以及该日为星期几, 天干地支.
- 若函式的返回值为 0 表示没有错误, 1 为输入之年份错误, 2 为输入之月份错误,
- 3 为输入之日期错误.
- 输入之西历年须在 1937 - 2031 间
- 输入之农历年须在 1936 - 2030 间
- 若须扩充, 则增加 LunarCal[]
- */
- #define FIRSTYEAR 1936 /* The first year in LunarCal[] */
- struct ConvDate
- {
- int Source;
- int SolarYear;
- int SolarMonth;
- int SolarDate;
- int LunarYear;
- int LunarMonth;
- int LunarDate;
- int Weekday;
- int Kan;
- int Chih;
- };
- struct tagLunarCal
- {
- int BaseDays; /* 到西历 1 月 1 日到农历正月初一的累积日数 */
- int Intercalation; /* 闰月月份. 0==此年没有闰月 */
- int BaseWeekday; /* 此年西历 1 月 1 日为星期几再减 1 */
- int BaseKanChih; /* 此年西历 1 月 1 日之干支序号减 1 */
- int MonthDays[13]; /* 此农历年每月之大小, 0==小月(29日), 1==大月(30日) */
- };
- struct tagLunarCal LunarCal[] = {
- { 23, 3, 2, 17, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0 }, /* 1936 */
- { 41, 0, 4, 23, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1 },
- { 30, 7, 5, 28, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1 },
- { 49, 0, 6, 33, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 },
- { 38, 0, 0, 38, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 }, /* 1940 */
- { 26, 6, 2, 44, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
- { 45, 0, 3, 49, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 },
- { 35, 0, 4, 54, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1 },
- { 24, 4, 5, 59, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1 }, /* 1944 */
- { 43, 0, 0, 5, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1 },
- { 32, 0, 1, 10, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1 },
- { 21, 2, 2, 15, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 },
- { 40, 0, 3, 20, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 }, /* 1948 */
- { 28, 7, 5, 26, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 },
- { 47, 0, 6, 31, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1 },
- { 36, 0, 0, 36, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 },
- { 26, 5, 1, 41, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1 }, /* 1952 */
- { 44, 0, 3, 47, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1 },
- { 33, 0, 4, 52, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0 },
- { 23, 3, 5, 57, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1 },
- { 42, 0, 6, 2, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1 }, /* 1956 */
- { 30, 8, 1, 8, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0 },
- { 48, 0, 2, 13, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0 },
- { 38, 0, 3, 18, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
- { 27, 6, 4, 23, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0 }, /* 1960 */
- { 45, 0, 6, 29, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0 },
- { 35, 0, 0, 34, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1 },
- { 24, 4, 1, 39, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0 },
- { 43, 0, 2, 44, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0 }, /* 1964 */
- { 32, 0, 4, 50, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 },
- { 20, 3, 5, 55, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0 },
- { 39, 0, 6, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0 },
- { 29, 7, 0, 5, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1 }, /* 1968 */
- { 47, 0, 2, 11, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1 },
- { 36, 0, 3, 16, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0 },
- { 26, 5, 4, 21, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1 },
- { 45, 0, 5, 26, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1 }, /* 1972 */
- { 33, 0, 0, 32, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1 },
- { 22, 4, 1, 37, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 },
- { 41, 0, 2, 42, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1 },
- { 30, 8, 3, 47, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1 }, /* 1976 */
- { 48, 0, 5, 53, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1 },
- { 37, 0, 6, 58, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1 },
- { 27, 6, 0, 3, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0 },
- { 46, 0, 1, 8, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0 }, /* 1980 */
- { 35, 0, 3, 14, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1 },
- { 24, 4, 4, 19, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1 },
- { 43, 0, 5, 24, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1 },
- { 32, 10, 6, 29, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1 }, /* 1984 */
- { 50, 0, 1, 35, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
- { 39, 0, 2, 40, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1 },
- { 28, 6, 3, 45, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0 },
- { 47, 0, 4, 50, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1 }, /* 1988 */
- { 36, 0, 6, 56, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0 },
- { 26, 5, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1 },
- { 45, 0, 1, 6, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0 },
- { 34, 0, 2, 11, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0 }, /* 1992 */
- { 22, 3, 4, 17, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
- { 40, 0, 5, 22, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
- { 30, 8, 6, 27, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1 },
- { 49, 0, 0, 32, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1 }, /* 1996 */
- { 37, 0, 2, 38, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1 },
- { 27, 5, 3, 43, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1 },
- { 46, 0, 4, 48, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1 },
- { 35, 0, 5, 53, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1 }, /* 2000 */
- { 23, 4, 0, 59, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 },
- { 42, 0, 1, 4, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 },
- { 31, 0, 2, 9, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
- { 21, 2, 3, 14, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1 }, /* 2004 */
- { 39, 0, 5, 20, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1 },
- { 28, 7, 6, 25, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1 },
- { 48, 0, 0, 30, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1 },
- { 37, 0, 1, 35, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1 }, /* 2008 */
- { 25, 5, 3, 41, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 },
- { 44, 0, 4, 46, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1 },
- { 33, 0, 5, 51, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 },
- { 22, 4, 6, 56, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 }, /* 2012 */
- { 40, 0, 1, 2, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 },
- { 30, 9, 2, 7, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1 },
- { 49, 0, 3, 12, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1 },
- { 38, 0, 4, 17, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0 }, /* 2016 */
- { 27, 6, 6, 23, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1 },
- { 46, 0, 0, 28, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0 },
- { 35, 0, 1, 33, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0 },
- { 24, 4, 2, 38, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 }, /* 2020 */
- { 42, 0, 4, 44, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
- { 31, 0, 5, 49, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0 },
- { 21, 2, 6, 54, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1 },
- { 40, 0, 0, 59, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1 }, /* 2024 */
- { 28, 6, 2, 5, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0 },
- { 47, 0, 3, 10, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1 },
- { 36, 0, 4, 15, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 },
- { 25, 5, 5, 20, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0 }, /* 2028 */
- { 43, 0, 0, 26, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1 },
- { 32, 0, 1, 31, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0 },
- { 22, 3, 2, 36, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0 } };
- #define LASTYEAR (FIRSTYEAR+sizeof(LunarCal)/sizeof(struct tagLunarCal)-1)
- /* 西历年每月之日数 */
- int SolarCal[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
- /* 西历年每月之累积日数, 平年与闰年 */
- int SolarDays[2][14] = {
- { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365, 396 },
- { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366, 397 } };
- /* 求此西历年是否为闰年, 返回 0 为平年, 1 为闰年 */
- int GetLeap( int year )
- {
- if ( year % 400 == 0 )
- return 1;
- else if ( year % 100 == 0 )
- return 0;
- else if ( year % 4 == 0 )
- return 1;
- else
- return 0;
- }
- /* 西历农历转换 */
- int CalConv( struct ConvDate *cd )
- {
- int leap, d, sm, y, im, l1, l2, acc, i, lm, kc;
- if ( cd->Source == 0 ) /* Solar */
- {
- if ( cd->SolarYear <= FIRSTYEAR || cd->SolarYear > LASTYEAR )
- return 1;
- sm = cd->SolarMonth - 1;
- if ( sm < 0 || sm > 11 )
- return 2;
- leap = GetLeap( cd->SolarYear );
- if ( sm == 1 )
- d = leap + 28;
- else
- d = SolarCal[sm];
- if ( cd->SolarDate < 1 || cd->SolarDate > d )
- return 3;
- y = cd->SolarYear - FIRSTYEAR;
- acc = SolarDays[leap][sm] + cd->SolarDate;
- cd->Weekday = ( acc + LunarCal[y].BaseWeekday ) % 7;
- kc = acc + LunarCal[y].BaseKanChih;
- cd->Kan = kc % 10;
- cd->Chih = kc % 12;
- if ( acc <= LunarCal[y].BaseDays )
- {
- y--;
- cd->LunarYear = cd->SolarYear - 1;
- leap = GetLeap( cd->LunarYear );
- sm += 12;
- acc = SolarDays[leap][sm] + cd->SolarDate;
- }
- else
- cd->LunarYear = cd->SolarYear;
- l1 = LunarCal[y].BaseDays;
- for ( i=0; i<13; i++ )
- {
- l2 = l1 + LunarCal[y].MonthDays[i] + 29;
- if ( acc <= l2 )
- break;
- l1 = l2;
- }
- cd->LunarMonth = i + 1;
- cd->LunarDate = acc - l1;
- im = LunarCal[y].Intercalation;
- if ( im != 0 && cd->LunarMonth > im )
- {
- cd->LunarMonth--;
- if ( cd->LunarMonth == im )
- cd->LunarMonth = -im;
- }
- if ( cd->LunarMonth > 12 )
- cd->LunarMonth -= 12;
- }
- else /* Lunar */
- {
- if ( cd->LunarYear < FIRSTYEAR || cd->LunarYear >= LASTYEAR )
- return 1;
- y = cd->LunarYear - FIRSTYEAR;
- im = LunarCal[y].Intercalation;
- lm = cd->LunarMonth;
- if ( lm < 0 )
- {
- if ( lm != -im )
- return 2;
- }
- else if ( lm < 1 || lm > 12 )
- return 2;
- if ( im != 0 )
- {
- if ( lm > im )
- lm++;
- else if ( lm == -im )
- lm = im + 1;
- }
- lm--;
- if ( cd->LunarDate > LunarCal[y].MonthDays[lm] + 29 )
- return 3;
- acc = LunarCal[y].BaseDays;
- for ( i=0; i<lm; i++ )
- acc += LunarCal[y].MonthDays[i] + 29;
- acc += cd->LunarDate;
- leap = GetLeap( cd->LunarYear );
- for ( i=13; i>=0; i-- )
- if ( acc > SolarDays[leap][i] )
- break;
- cd->SolarDate = acc - SolarDays[leap][i];
- if ( i <= 11 )
- {
- cd->SolarYear = cd->LunarYear;
- cd->SolarMonth = i + 1;
- }
- else
- {
- cd->SolarYear = cd->LunarYear + 1;
- cd->SolarMonth = i - 11;
- }
- leap = GetLeap( cd->SolarYear );
- y = cd->SolarYear - FIRSTYEAR;
- acc = SolarDays[leap][cd->SolarMonth-1] + cd->SolarDate;
- cd->Weekday = ( acc + LunarCal[y].BaseWeekday ) % 7;
- kc = acc + LunarCal[y].BaseKanChih;
- cd->Kan = kc % 10;
- cd->Chih = kc % 12;
- }
- return 0;
- }
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