Delphi处理公历到农历的转换


const
 START_YEAR=1901;
 END_YEAR=2050;

//返回iYear年iMonth月的天数 1年1月 --- 65535年12月
function MonthDays(iYear,iMonth:Word):Word;

//返回阴历iLunarYer年阴历iLunarMonth月的天数,如果iLunarMonth为闰月,
//高字为第二个iLunarMonth月的天数,否则高字为0  1901年1月---2050年12月
function LunarMonthDays(iLunarYear,iLunarMonth:Word):Longword;

//返回阴历iLunarYear年的总天数 1901年1月---2050年12月
function LunarYearDays(iLunarYear:Word):Word;

//返回阴历iLunarYear年的闰月月份,如没有返回0  1901年1月---2050年12月
function GetLeapMonth(iLunarYear:Word):Word;

//把iYear年格式化成天干记年法表示的字符串
procedure FormatLunarYear(iYear:Word;var pBuffer:string);overload;
function FormatLunarYear(iYear:Word):string;overload;

//把iMonth格式化成中文字符串
procedure FormatMonth(iMonth:Word;var pBuffer:string;bLunar:Boolean=True);overload;
function FormatMonth(iMonth:Word;bLunar:Boolean=True):string;overload;

//把iDay格式化成中文字符串
procedure FormatLunarDay(iDay:Word;var pBuffer:string);overload;
function FormatLunarDay(iDay:Word):string;overload;

//计算公历两个日期间相差的天数  1年1月1日 --- 65535年12月31日
function CalcDateDiff
(iEndYear,iEndMonth,iEndDay:Word;iStartYear:Word=START_YEAR;iStartMonth:Word=
1;iStartDay:Word=1):Longword;overload;
function CalcDateDiff(EndDate,StartDate:TDateTime):Longword;overload;

//计算公历iYear年iMonth月iDay日对应的阴历日期,返回对应的阴历节气 0-24
//1901年1月1日---2050年12月31日

function GetLunarHolDay(InDate:TDateTime):string;overload;
function GetLunarHolDay(iYear,iMonth,iDay:Word):string;overload;

//private function--------------------------------------

//计算从1901年1月1日过iSpanDays天后的阴历日期
procedure l_CalcLunarDate(var iYear,iMonth,iDay:Word;iSpanDays:Longword);

//计算公历iYear年iMonth月iDay日对应的节气 0-24,0表不是节气
function l_GetLunarHolDay(iYear,iMonth,iDay:Word):Word;

implementation

var
//数组gLunarDay存入阴历1901年到2100年每年中的月天数信息,
//阴历每月只能是29或30天,一年用12(或13)个二进制位表示,对应位为1表30天,否则为29天
 gLunarMonthDay:array[0..149] of Word=(
 //测试数据只有1901.1.1 --2050.12.31
 $4ae0, $a570, $5268, $d260, $d950, $6aa8, $56a0, $9ad0, $4ae8, $4ae0,  //1910
 $a4d8, $a4d0, $d250, $d548, $b550, $56a0, $96d0, $95b0, $49b8, $49b0,  //1920
 $a4b0, $b258, $6a50, $6d40, $ada8, $2b60, $9570, $4978, $4970, $64b0,  //1930
 $d4a0, $ea50, $6d48, $5ad0, $2b60, $9370, $92e0, $c968, $c950, $d4a0,  //1940
 $da50, $b550, $56a0, $aad8, $25d0, $92d0, $c958, $a950, $b4a8, $6ca0,  //1950
 $b550, $55a8, $4da0, $a5b0, $52b8, $52b0, $a950, $e950, $6aa0, $ad50,  //1960
 $ab50, $4b60, $a570, $a570, $5260, $e930, $d950, $5aa8, $56a0, $96d0,  //1970
 $4ae8, $4ad0, $a4d0, $d268, $d250, $d528, $b540, $b6a0, $96d0, $95b0,  //1980
 $49b0, $a4b8, $a4b0, $b258, $6a50, $6d40, $ada0, $ab60, $9370, $4978,  //1990
 $4970, $64b0, $6a50, $ea50, $6b28, $5ac0, $ab60, $9368, $92e0, $c960,  //2000
 $d4a8, $d4a0, $da50, $5aa8, $56a0, $aad8, $25d0, $92d0, $c958, $a950,  //2010
 $b4a0, $b550, $b550, $55a8, $4ba0, $a5b0, $52b8, $52b0, $a930, $74a8,  //2020
 $6aa0, $ad50, $4da8, $4b60, $9570, $a4e0, $d260, $e930, $d530, $5aa0,  //2030
 $6b50, $96d0, $4ae8, $4ad0, $a4d0, $d258, $d250, $d520, $daa0, $b5a0,  //2040
 $56d0, $4ad8, $49b0, $a4b8, $a4b0, $aa50, $b528, $6d20, $ada0, $55b0);  //2050

//数组gLanarMonth存放阴历1901年到2050年闰月的月份,如没有则为0,每字节存两年
 gLunarMonth:array[0..74] of Byte=(
 $00, $50, $04, $00, $20,  //1910
 $60, $05, $00, $20, $70,  //1920
 $05, $00, $40, $02, $06,  //1930
 $00, $50, $03, $07, $00,  //1940
 $60, $04, $00, $20, $70,  //1950
 $05, $00, $30, $80, $06,  //1960
 $00, $40, $03, $07, $00,  //1970
 $50, $04, $08, $00, $60,  //1980
 $04, $0a, $00, $60, $05,  //1990
 $00, $30, $80, $05, $00,  //2000
 $40, $02, $07, $00, $50,  //2010
 $04, $09, $00, $60, $04,  //2020
 $00, $20, $60, $05, $00,  //2030
 $30, $b0, $06, $00, $50,  //2040
 $02, $07, $00, $50, $03);  //2050

//数组gLanarHoliDay存放每年的二十四节气对应的阳历日期
//每年的二十四节气对应的阳历日期几乎固定,平均分布于十二个月中
//  1月  2月  3月  4月  5月  6月
//小寒 大寒  立春  雨水  惊蛰 春分  清明 谷雨  立夏 小满  芒种 夏至
//  7月  8月  9月  10月  11月  12月
//小暑 大暑  立秋  处暑  白露 秋分  寒露 霜降  立冬 小雪  大雪 冬至
{*********************************************************************************
节气无任何确定规律,所以只好存表,要节省空间,所以....
**********************************************************************************}
//数据格式说明:
//如1901年的节气为
//  1月  2月  3月  4月  5月  6月  7月  8月  9月  10月  11月  12月
// 6, 21, 4, 19,  6, 21, 5, 21, 6,22, 6,22, 8, 23, 8, 24, 8, 24, 8, 24, 8, 23, 8, 22
// 9, 6,  11,4,  9, 6,  10,6,  9,7,  9,7,  7, 8,  7, 9,  7,  9, 7,  9, 7,  8, 7, 15
//上面第一行数据为每月节气对应日期,15减去每月第一个节气,每月第二个节气减去15得第二行
// 这样每月两个节气对应数据都小于16,每月用一个字节存放,高位存放第一个节气数据,低位存

//第二个节气的数据,可得下表
 gLunarHolDay:array[0..1799] of Byte=(
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1901
 $96, $A4, $96, $96, $97, $87, $79, $79, $79, $69, $78, $78,  //1902
 $96, $A5, $87, $96, $87, $87, $79, $69, $69, $69, $78, $78,  //1903
 $86, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $78, $87,&nbsp
;  //1904
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1905
 $96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78,  //1906
 $96, $A5, $87, $96, $87, $87, $79, $69, $69, $69, $78, $78,  //1907
 $86, $A5, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1908
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1909
 $96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78,  //1910
 $96, $A5, $87, $96, $87, $87, $79, $69, $69, $69, $78, $78,  //1911
 $86, $A5, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1912
 $95, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1913
 $96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $78,  //1914
 $96, $A5, $97, $96, $97, $87, $79, $79, $69, $69, $78, $78,  //1915
 $96, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1916
 $95, $B4, $96, $A6, $96, $97, $78, $79, $78, $69, $78, $87,  //1917
 $96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $77,  //1918
 $96, $A5, $97, $96, $97, $87, $79, $79, $69, $69, $78, $78,  //1919
 $96, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1920
 $95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $87,  //1921
 $96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $77,  //1922
 $96, $A4, $96, $96, $97, $87, $79, $79, $69, $69, $78, $78,  //1923
 $96, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1924
 $95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $87,  //1925
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1926
 $96, $A4, $96, $96, $97, $87, $79, $79, $79, $69, $78, $78,  //1927
 $96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1928
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1929
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1930
 $96, $A4, $96, $96, $97, $87, $79, $79, $79, $69, $78, $78,  //1931
 $96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1932
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1933
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1934
 $96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78,  //1935
 $96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1936
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1937
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1938
 $96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78,  //1939
 $96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1940
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1941
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1942
 $96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78,  //1943
 $96, $A5, $96, $A5, $A6, $96, $88, $78, $78, $78, $87, $87,  //1944
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1945
 $95, $B4, $96, $A6, $97, $97, $78, $79, $78, $69, $78, $77,  //1946
 $96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $78,  //1947
 $96, $A5, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //1948
 $A5, $B4, $96, $A5, $96, $97, $88, $79, $78, $79, $77, $87,  //1949
 $95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $77,  //1950
 $96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $78,  //1951
 $96, $A5, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //1952
 $A5, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1953
 $95, $B4, $96, $A5, $96, $97, $78, $79, $78, $68, $78, $87,  //1954
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1955
 $96, $A5, $A5, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //1956
 $A5, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1957
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1958
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1959
 $96, $A4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87,  //1960
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1961
 $96, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1962
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1963
 $96, $A4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87,  //1964
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1965
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1966
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1967
 $96, $A4, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //1968
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1969
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1970
 $96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77,  //1971
 $96, $A4, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //1972
 $A5, $B5, $96, $A5, $A6, $96, $88, $78, $78, $78, $87, $87,  //1973
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1974
 $96, $B4, $96, $A6, $97, $97, $78, $79, $78, $69, $78, $77,  //1975
 $96, $A4, $A5, $B5, $A6, $A6, $88, $89, $88, $78, $87, $87,  //1976
 $A5, $B4, $96, $A5, $96, $96, $88, $88, $78, $78, $87, $87,  //1977
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $78, $87,  //1978
 $96, $B4, $96, $A6, $96, $97, $78, $79, $78, $69, $78, $77,  //1979
 $96, $A4, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //1980
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $77, $87,  //1981
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1982
 $95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $77,  //1983
 $96, $B4, $A5,
$B5, $A6, $A6, $87, $88, $88, $78, $87, $87,  //1984
 $A5, $B4, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //1985
 $A5, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //1986
 $95, $B4, $96, $A5, $96, $97, $88, $79, $78, $69, $78, $87,  //1987
 $96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //1988
 $A5, $B4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87,  //1989
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $79, $77, $87,  //1990
 $95, $B4, $96, $A5, $86, $97, $88, $78, $78, $69, $78, $87,  //1991
 $96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //1992
 $A5, $B3, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87,  //1993
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1994
 $95, $B4, $96, $A5, $96, $97, $88, $76, $78, $69, $78, $87,  //1995
 $96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //1996
 $A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //1997
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //1998
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //1999
 $96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //2000
 $A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //2001
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //2002
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //2003
 $96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //2004
 $A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //2005
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2006
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87,  //2007
 $96, $B4, $A5, $B5, $A6, $A6, $87, $88, $87, $78, $87, $86,  //2008
 $A5, $B3, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //2009
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2010
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $78, $87,  //2011
 $96, $B4, $A5, $B5, $A5, $A6, $87, $88, $87, $78, $87, $86,  //2012
 $A5, $B3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $87,  //2013
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2014
 $95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87,  //2015
 $95, $B4, $A5, $B4, $A5, $A6, $87, $88, $87, $78, $87, $86,  //2016
 $A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $87,  //2017
 $A5, $B4, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2018
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $79, $77, $87,  //2019
 $95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $86,  //2020
 $A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //2021
 $A5, $B4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87,  //2022
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $79, $77, $87,  //2023
 $95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96,  //2024
 $A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //2025
 $A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //2026
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //2027
 $95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96,  //2028
 $A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //2029
 $A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //2030
 $A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87,  //2031
 $95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96,  //2032
 $A5, $C3, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $86,  //2033
 $A5, $B3, $A5, $A5, $A6, $A6, $88, $78, $88, $78, $87, $87,  //2034
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2035
 $95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96,  //2036
 $A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86,  //2037
 $A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //2038
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2039
 $95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96,  //2040
 $A5, $C3, $A5, $B5, $A5, $A6, $87, $88, $87, $78, $87, $86,  //2041
 $A5, $B3, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $87,  //2042
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2043
 $95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $88, $87, $96,  //2044
 $A5, $C3, $A5, $B4, $A5, $A6, $87, $88, $87, $78, $87, $86,  //2045
 $A5, $B3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $87,  //2046
 $A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87,  //2047
 $95, $B4, $A5, $B4, $A5, $A5, $97, $87, $87, $88, $86, $96,  //2048
 $A4, $C3, $A5, $A5, $A5, $A6, $97, $87, $87, $78, $87, $86,  //2049
 $A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $78, $78, $87, $87);  //2050

function MonthDays(iYear,iMonth:Word):Word;
begin
 case iMonth of
 1,3,5,7,8,10,12: Result:=31;
 4,6,9,11: Result:=30;
 2://如果是闰年
 if IsLeapYear(iYear) then
 Result:=29
 else
 Result:=28
 else
 Result:=0;
 end;
end;

function GetLeapMonth(iLunarYear:Word):Word;
var
 Flag:Byte;
begin
 Flag:=gLunarMonth[(iLunarYear-START_YEAR) div 2];
 if (iLunarYear-START_YEAR) mod 2=0 then
 Result:=Flag shr 4
 else
 Result:=Flag and $0F;
end;

function LunarMonthDays(iLunarYear,iLunarMonth:Word):Longword;
var
 Height,Low:Word;
 iBit:Integer;
begin
 if iLunarYear<START_YEAR then
 begin
 Result:=30;
 Exit;
 end;
 Height:=0;
 Low:=29;
 iBit:=16-iLunarMonth;
 if (iLunarMonth>GetLeapMonth(iLunarYear)) and (GetLeapMonth(iLunarYear)>
0) then
 Dec(iBit);
 if (gLunarMonthDay[iLunarYear-START_YEAR] and (1 shl iBit))>0 then
 Inc(Low);
 if iLunarMonth=GetLeapMonth(iLunarYear) then
 if (gLunarMonthDay[iLunarYear-START_YEAR] and (1 shl (iBit-1)))>0 then
 Height:=30
 else
 Height:=29;
 Result:=MakeLong(Low,Height);
end;

function LunarYearDays(iLunarYear:Word):Word;
var
 Days,i:Word;
 tmp:Longword;
begin
 Days:=0;
 for i:=1 to 12 do
 begin
 tmp:=LunarMonthDays(iLunarYear,i);
 Days:=Days+HiWord(tmp);
 Days:=Days+LoWord(tmp);
 end;
 Result:=Days;
end;

procedure FormatLunarYear(iYear:Word;var pBuffer:string);
var
 szText1,szText2,szText3:string;
begin
 szText1:=’甲乙丙丁戊己庚辛壬癸’;
 szText2:=’子丑寅卯辰巳午未申酉戌亥’;
 szText3:=’鼠牛虎免龙蛇马羊猴鸡狗猪’;
 pBuffer:=Copy(szText1,((iYear-4) mod 10)*2+1,2);
 pBuffer:=pBuffer+Copy(szText2,((iYear-4) mod 12)*2+1,2);
 pBuffer:=pBuffer+’ ’;
 pBuffer:=pBuffer+Copy(szText3,((iYear-4) mod 12)*2+1,2);
 pBuffer:=pBuffer+’年’;
end;

function FormatLunarYear(iYear:Word):string;
var
 pBuffer:string;
begin
 FormatLunarYear(iYear,pBuffer);
 Result:=pBuffer;
end;

procedure FormatMonth(iMonth:Word;var pBuffer:string;bLunar:Boolean);
var
 szText:string;
begin
 if (not bLunar) and (iMonth=1) then
 begin
 pBuffer:=’  一月’;
 Exit;
 end;
 szText:=’正二三四五六七八九十’;
 if iMonth<=10 then
 begin
 pBuffer:=’  ’;
 pBuffer:=pBuffer+Copy(szText,(iMonth-1)*2+1,2);
 pBuffer:=pBuffer+’月’;
 Exit;
 end;
 if iMonth=11 then
 pBuffer:=’十一’
 else
 pBuffer:=’十二’;
 pBuffer:=pBuffer+’月’;
end;

function FormatMonth(iMonth:Word;bLunar:Boolean):string;
var
 pBuffer:string;
begin
 FormatMonth(iMonth,pBuffer,bLunar);
 Result:=pBuffer;
end;

procedure FormatLunarDay(iDay:Word;var pBuffer:string);
var
 szText1,szText2:string;
begin
 szText1:=’初十廿三’;
 szText2:=’一二三四五六七八九十’;
 if (iDay<>20) and (iDay<>30) then
 begin
 pBuffer:=Copy(szText1,((iDay-1) div 10)*2+1,2);
 pBuffer:=pBuffer+Copy(szText2,((iDay-1) mod 10)*2+1,2);
 end
 else
 begin
 pBuffer:=Copy(szText1,(iDay div 10)*2+1,2);
 pBuffer:=pBuffer+’十’;
 end;
end;

function FormatLunarDay(iDay:Word):string;
var
 pBuffer:string;
begin
 FormatLunarDay(iDay,pBuffer);
 Result:=pBuffer;
end;

function CalcDateDiff
(iEndYear,iEndMonth,iEndDay:Word;iStartYear:Word;iStartMonth:Word;iStartDay:Word):Lon
gword;
begin
 Result:=Trunc(EncodeDate(iEndYear,iEndMonth,iEndDay)-EncodeDate
(iStartYear,iStartMonth,iStartDay));
end;

function CalcDateDiff(EndDate,StartDate:TDateTime):Longword;
begin
 Result:=Trunc(EndDate-StartDate);
end;

procedure l_CalcLunarDate(var iYear,iMonth,iDay:Word;iSpanDays:Longword);
var
 tmp:Longword;
begin
 //阳历1901年2月19日为阴历1901年正月初一
 //阳历1901年1月1日到2月19日共有49天
 if iSpanDays<49 then
 begin
 iYear:=START_YEAR-1;
 if iSpanDays<19 then
 begin
 iMonth:=11;
 iDay:=11+Word(iSpanDays);
 end
 else
 begin
 iMonth:=12;
 iDay:=Word(iSpanDays)-18;
 end;
 Exit;
 end;
 //下面从阴历1901年正月初一算起
 iSpanDays:=iSpanDays-49;
 iYear:=START_YEAR;
 iMonth:=1;
 iDay:=1;
 //计算年
 tmp:=LunarYearDays(iYear);
 while iSpanDays>=tmp do
 begin
 iSpanDays:=iSpanDays-tmp;
 Inc(iYear);
 tmp:=LunarYearDays(iYear);
 end;
 //计算月
 tmp:=LoWord(LunarMonthDays(iYear,iMonth));
 while iSpanDays>=tmp do
 begin
 iSpanDays:=iSpanDays-tmp;
 if iMonth=GetLeapMonth(iYear) then
 begin
 tmp:=HiWord(LunarMonthDays(iYear,iMonth));
 if iSpanDays<tmp then Break;
 iSpanDays:=iSpanDays-tmp;
 end;
 Inc(iMonth);
 tmp:=LoWord(LunarMonthDays(iYear,iMonth));
 end;
 //计算日
 iDay:=iDay+Word(iSpanDays);
end;

function l_GetLunarHolDay(iYear,iMonth,iDay:Word):Word;
var
 Flag:Byte;
 Day:Word;
begin
 Flag:=gLunarHolDay[(iYear-START_YEAR)*12+iMonth-1];
 if iDay<15 then
 Day:=15-((Flag shr 4) and $0f)
 else
 Day:=(Flag and $0f)+15;
 if iDay=Day then
 if iDay>15 then
 Result:=(iMonth-1)*2+2
 else
 Result:=(iMonth-1)*2+1
 else
 Result:= 0;
end;

function GetLunarHolDay(InDate:TDateTime):string;
var
 i,iYear,iMonth,iDay:Word;
begin
 DecodeDate(InDate,iYear,iMonth,iDay);
 i:=l_GetLunarHolDay(iYear,iMonth,iDay);
 case i of
 1:Result:=’小 寒’;
 2:Result:=’大 寒’;
 3:Result:=’立 春’;
 4:Result:=’雨 水’;
 5:Result:=’惊 蛰’;
 6:Result:=’春 分’;
 7:Result:=’清 明’;
 8:Result:=’谷 雨’;
 9:Result:=’立 夏’;
 10:Result:=’小 满’;
 11:Result:=’芒 种’;
 12:Result:=’夏 至’;
 13:Result:=’小 暑’;
 14:Result:=’大 暑’;
 15:Result:=’立 秋’;
 16:Result:=’处 暑’;
 17:Result:=’白 露’;
 18:Result:=’秋 分’;
 19:Result:=’寒 露’;
 20:Result:=’霜 降’;
 21:Result:=’立 冬’;
 22:Result:=’小 雪’;
&nb
sp;  23:Result:=’大 雪’;
 24:Result:=’冬 至’;
 else
 l_CalcLunarDate(iYear,iMonth,iDay,CalcDateDiff(InDate,EncodeDate
(START_YEAR,1,1)));
 Result := trim(FormatMonth(iMonth) + FormatLunarDay(iDay));
 end;
end;

function GetLunarHolDay(iYear,iMonth,iDay:Word):string;
begin
 Result:=GetLunarHolDay(EncodeDate(iYear,iMonth,iDay));
end;
end.


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