DELPHI陽暦転旧暦コード

unit DateCn;  

interface  

uses Windows, SysUtils, Controls;  

const  
  //      ，  4  ， 1901   ， 150   
  //    ：UCDOS 6.0 UCT.COM  
  //    ：Copyright (c) 1996-1998, Randolph  
  //    ：  
  //       bit7 1，   1 1     12 ，    11   
  //      bit7   1 1        
  //                                  
  //bit:    7  6  5  4  3  2  1  0  7  6  5  4  3  2  1  0  
  //    :16 15 14 13 12 11 10 9  8  7  6  5  4  3  2  1  
  //          1 1              
  //       bit 1    30 ，   29   
  //           
  CnData: array[0..599] of Byte = (  
    ＄0b,＄52,＄ba,＄00,＄16,＄a9,＄5d,＄00,＄83,＄a9,＄37,＄05,＄0e,＄74,＄9b,＄00,  
    ＄1a,＄b6,＄55,＄00,＄87,＄b5,＄55,＄04,＄11,＄55,＄aa,＄00,＄1c,＄a6,＄b5,＄00,  
    ＄8a,＄a5,＄75,＄02,＄14,＄52,＄ba,＄00,＄81,＄52,＄6e,＄06,＄0d,＄e9,＄37,＄00,  
    ＄18,＄74,＄97,＄00,＄86,＄ea,＄96,＄05,＄10,＄6d,＄55,＄00,＄1a,＄35,＄aa,＄00,  
    ＄88,＄4b,＄6a,＄02,＄13,＄a5,＄6d,＄00,＄1e,＄d2,＄6e,＄07,＄0b,＄d2,＄5e,＄00,  
    ＄17,＄e9,＄2e,＄00,＄84,＄d9,＄2d,＄05,＄0f,＄da,＄95,＄00,＄19,＄5b,＄52,＄00,  
    ＄87,＄56,＄d4,＄04,＄11,＄4a,＄da,＄00,＄1c,＄a5,＄5d,＄00,＄89,＄a4,＄bd,＄02,  
    ＄15,＄d2,＄5d,＄00,＄82,＄b2,＄5b,＄06,＄0d,＄b5,＄2b,＄00,＄18,＄ba,＄95,＄00,  
    ＄86,＄b6,＄a5,＄05,＄10,＄56,＄b4,＄00,＄1a,＄4a,＄da,＄00,＄87,＄49,＄ba,＄03,  
    ＄13,＄a4,＄bb,＄00,＄1e,＄b2,＄5b,＄07,＄0b,＄72,＄57,＄00,＄16,＄75,＄2b,＄00,  
    ＄84,＄6d,＄2a,＄06,＄0f,＄ad,＄55,＄00,＄19,＄55,＄aa,＄00,＄86,＄55,＄6c,＄04,  
    ＄12,＄c9,＄76,＄00,＄1c,＄64,＄b7,＄00,＄8a,＄e4,＄ae,＄02,＄15,＄ea,＄56,＄00,  
    ＄83,＄da,＄55,＄07,＄0d,＄5b,＄2a,＄00,＄18,＄ad,＄55,＄00,＄85,＄aa,＄d5,＄05,  
    ＄10,＄53,＄6a,＄00,＄1b,＄a9,＄6d,＄00,＄88,＄a9,＄5d,＄03,＄13,＄d4,＄ae,＄00,  
    ＄81,＄d4,＄ab,＄08,＄0c,＄ba,＄55,＄00,＄16,＄5a,＄aa,＄00,＄83,＄56,＄aa,＄06,  
    ＄0f,＄aa,＄d5,＄00,＄19,＄52,＄da,＄00,＄86,＄52,＄ba,＄04,＄11,＄a9,＄5d,＄00,  
    ＄1d,＄d4,＄9b,＄00,＄8a,＄74,＄9b,＄03,＄15,＄b6,＄55,＄00,＄82,＄ad,＄55,＄07,  
    ＄0d,＄55,＄aa,＄00,＄18,＄a5,＄b5,＄00,＄85,＄a5,＄75,＄05,＄0f,＄52,＄b6,＄00,  
    ＄1b,＄69,＄37,＄00,＄89,＄e9,＄37,＄04,＄13,＄74,＄97,＄00,＄81,＄ea,＄96,＄08,  
    ＄0c,＄6d,＄52,＄00,＄16,＄2d,＄aa,＄00,＄83,＄4b,＄6a,＄06,＄0e,＄a5,＄6d,＄00,  
    ＄1a,＄d2,＄6e,＄00,＄87,＄d2,＄5e,＄04,＄12,＄e9,＄2e,＄00,＄1d,＄ec,＄96,＄0a,  
    ＄0b,＄da,＄95,＄00,＄15,＄5b,＄52,＄00,＄82,＄56,＄d2,＄06,＄0c,＄2a,＄da,＄00,  
    ＄18,＄a4,＄dd,＄00,＄85,＄a4,＄bd,＄05,＄10,＄d2,＄5d,＄00,＄1b,＄d9,＄2d,＄00,  
    ＄89,＄b5,＄2b,＄03,＄14,＄ba,＄95,＄00,＄81,＄b5,＄95,＄08,＄0b,＄56,＄b2,＄00,  
    ＄16,＄2a,＄da,＄00,＄83,＄49,＄b6,＄05,＄0e,＄64,＄bb,＄00,＄19,＄b2,＄5b,＄00,  
    ＄87,＄6a,＄57,＄04,＄12,＄75,＄2b,＄00,＄1d,＄b6,＄95,＄00,＄8a,＄ad,＄55,＄02,  
    ＄15,＄55,＄aa,＄00,＄82,＄55,＄6c,＄07,＄0d,＄c9,＄76,＄00,＄17,＄64,＄b7,＄00,  
    ＄86,＄e4,＄ae,＄05,＄11,＄ea,＄56,＄00,＄1b,＄6d,＄2a,＄00,＄88,＄5a,＄aa,＄04,  
    ＄14,＄ad,＄55,＄00,＄81,＄aa,＄d5,＄09,＄0b,＄52,＄ea,＄00,＄16,＄a9,＄6d,＄00,  
    ＄84,＄a9,＄5d,＄06,＄0f,＄d4,＄ae,＄00,＄1a,＄ea,＄4d,＄00,＄87,＄ba,＄55,＄04,  
    ＄12,＄5a,＄aa,＄00,＄1d,＄ab,＄55,＄00,＄8a,＄a6,＄d5,＄02,＄14,＄52,＄da,＄00,  
    ＄82,＄52,＄ba,＄06,＄0d,＄a9,＄3b,＄00,＄18,＄b4,＄9b,＄00,＄85,＄74,＄9b,＄05,  
    ＄11,＄b5,＄4d,＄00,＄1c,＄d6,＄a9,＄00,＄88,＄35,＄aa,＄03,＄13,＄a5,＄b5,＄00,  
    ＄81,＄a5,＄75,＄0b,＄0b,＄52,＄b6,＄00,＄16,＄69,＄37,＄00,＄84,＄e9,＄2f,＄06,  
    ＄10,＄f4,＄97,＄00,＄1a,＄75,＄4b,＄00,＄87,＄6d,＄52,＄05,＄11,＄2d,＄69,＄00,  
    ＄1d,＄95,＄b5,＄00,＄8a,＄a5,＄6d,＄02,＄15,＄d2,＄6e,＄00,＄82,＄d2,＄5e,＄07,  
    ＄0e,＄e9,＄2e,＄00,＄19,＄ea,＄96,＄00,＄86,＄da,＄95,＄05,＄10,＄5b,＄4a,＄00,  
    ＄1c,＄ab,＄69,＄00,＄88,＄2a,＄d8,＄03);  

  function CnMonthOfDate(Date: TDate): String;//          
  function CnDayOfDate(Date: TDate): String;//          
  function CnDateOfDateStr(Date: TDate): String;//           

implementation  

//         ，1 1       
function DaysNumberOfDate(Date: TDate): Integer;  
var  
  DaysNumber: Integer;  
  I: Integer;  
  yyyy, mm, dd: Word;  
begin  
  DecodeDate(Date, yyyy, mm, dd);  
  DaysNumber := 0;  
  for I := 1 to mm - 1 do  
    Inc(DaysNumber, MonthDays[IsLeapYear(yyyy), I]);  
  Inc(DaysNumber, dd);  
  Result := DaysNumber;  
end;  

//       ，      ：  *100 +  ，       
//       0  
function CnDateOfDate(Date: TDate): Integer;  
var  
  CnMonth, CnMonthDays: array[0..15] of Integer;  

  CnBeginDay, LeapMonth: Integer;  
  yyyy, mm, dd: Word;  
  Bytes: array[0..3] of Byte;  
  I: Integer;  
  CnMonthData: Word;  
  DaysCount, CnDaysCount, ResultMonth, ResultDay: Integer;  
begin  
  DecodeDate(Date, yyyy, mm, dd);  
  if (yyyy < 1901) or (yyyy > 2050) then  
  begin  
    Result := 0;  
    Exit;  
  end;  
  Bytes[0] := CnData[(yyyy - 1901) * 4];  
  Bytes[1] := CnData[(yyyy - 1901) * 4 + 1];  
  Bytes[2] := CnData[(yyyy - 1901) * 4 + 2];  
  Bytes[3] := CnData[(yyyy - 1901) * 4 + 3];  
  if (Bytes[0] and ＄80) <> 0 then CnMonth[0] := 12  
  else CnMonth[0] := 11;  
  CnBeginDay := (Bytes[0] and ＄7f);  
  CnMonthData := Bytes[1];  
  CnMonthData := CnMonthData shl 8;  
  CnMonthData := CnMonthData or Bytes[2];  
  LeapMonth := Bytes[3];  

  for I := 15 downto 0 do  
  begin  
    CnMonthDays[15 - I] := 29;  
    if ((1 shl I) and CnMonthData) <> 0 then  
      Inc(CnMonthDays[15 - I]);  
    if CnMonth[15 - I] = LeapMonth then  
      CnMonth[15 - I + 1] := - LeapMonth  
    else  
    begin  
      if CnMonth[15 - I] < 0 then //      
CnMonth[15 - I + 1] := - CnMonth[15 - I] + 1 
else CnMonth[15 - I + 1] := CnMonth[15 - I] + 1; 
if CnMonth[15 - I + 1] > 12 then CnMonth[15 - I + 1] := 1;  
    end;  
  end;  

  DaysCount := DaysNumberOfDate(Date) - 1;  
  if DaysCount <= (CnMonthDays[0] - CnBeginDay) then 
begin 
if (yyyy > 1901) and  
      (CnDateOfDate(EncodeDate(yyyy - 1, 12, 31)) < 0) then 
ResultMonth := - CnMonth[0] 
else ResultMonth := CnMonth[0]; 
ResultDay := CnBeginDay + DaysCount; 
end 
else 
begin 
CnDaysCount := CnMonthDays[0] - CnBeginDay; 
I := 1; 
while (CnDaysCount < DaysCount) and 
(CnDaysCount + CnMonthDays[I] < DaysCount) do 
begin 
Inc(CnDaysCount, CnMonthDays[I]); 
Inc(I); 
end; 
ResultMonth := CnMonth[I]; 
ResultDay := DaysCount - CnDaysCount; 
end; 
if ResultMonth > 0 then  
    Result := ResultMonth * 100 + ResultDay  
  else Result := ResultMonth * 100 - ResultDay  
end;  

function CnMonthOfDate(Date: TDate): String;  
const  
  CnMonthStr: array[1..12] of String = (  
    ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',  
    ' ', ' ');  
var  
  Month: Integer;  
begin  
  Month := CnDateOfDate(Date) div 100;  
  if Month < 0 then Result := ' ' + CnMonthStr[-Month] 
else Result := CnMonthStr[Month] + ' '; 
end; 

function CnDayOfDate(Date: TDate): String; 
const 
CnDayStr: array[1..30] of String = ( 
'  ', '  ', '  ', '  ', '  ', 
'  ', '  ', '  ', '  ', '  ', 
'  ', '  ', '  ', '  ', '  ', 
'  ', '  ', '  ', '  ', '  ', 
'  ', '  ', '  ', '  ', '  ', 
'  ', '  ', '  ', '  ', '  '); 
var 
Day: Integer; 
begin 
Day := Abs(CnDateOfDate(Date)) mod 100; 
Result := CnDayStr[Day]; 
end; 

function CnDateOfDateStr(Date: TDate): String; 
begin 
Result := CnMonthOfDate(Date) + CnDayOfDate(Date); 
end; 

end.