// Calender.cpp: implementation of the CCalender class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "Tide.h"
#include "Calender.h"
#include "stdio.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CCalender::CCalender()
{

}

CCalender::~CCalender()
{

}

DWORD CCalender::lunarInfo[]={
	0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,
		0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,
		0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,
		0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,
		0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,
		0x06ca0,0x0b550,0x15355,0x04da0,0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,
		0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,
		0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b5a0,0x195a6,
		0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,
		0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,0x092e0,
		0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,
		0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,
		0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,
		0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,
		0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0
};


UINT CCalender::solarMonth[]={31,28,31,30,31,30,31,31,30,31,30,31};
UINT CCalender::lYearDays(UINT y)
{
	UINT i, sum = 348; 
	for(i=0x8000; i>0x8; i>>=1)
	{
		sum += (lunarInfo[y-1900] & i)? 1: 0;
	}
	return(sum+leapDays(y));
}  
UINT CCalender::leapDays(UINT y)
{
	if(leapMonth(y))
	{
		return (lunarInfo[y-1900] & 0x10000)? 30: 29;
	}
	else
	{
		return 0;
	}
} 
UINT CCalender::leapMonth(UINT y)
{
	return lunarInfo[y-1900] & 0xf;
} 
UINT CCalender::monthDays(UINT y,UINT m)
{
	return (lunarInfo[y-1900] & (0x10000>>m))? 30: 29;
}
LONG CCalender::lDaysFrom1900(myDATE date)
{
	LONG days; 

	days=365*date.year+(date.year-1)/4-(date.year-1)/100+(date.year-1)/400-
		(365*1900+(1900-1)/4-(1900-1)/100+(1900-1)/400);
  
	for(int i=0;i<date.month-1;i++)
	{
		days+=solarMonth[i];
	}
	days+=date.day;
	if((date.year%4==0&&date.year%100!=0)||date.year%400==0)
	{
		if(date.month>2)
		{
			days++;
		}
	}
	return days;
}


myDATE CCalender::Lunar(myDATE date)
{
	LONG offset;
	int i, leap=0, temp=0;
	myDATE retdate;

	offset=lDaysFrom1900(date)-30; 

	for(i=1900; i<2050 && offset>0; i++)
	{
		temp = lYearDays(i);
		offset -= temp;
	}  

	if(offset<0)
	{
		offset += temp;
		i--;
	} 

	retdate.year = i;
	leap = leapMonth(i);
	bool isLeap = false;  

	for(i=1; i<13 && offset>0; i++)
	{
		if(leap>0 && i==(leap+1) && isLeap==false)
		{
			--i;
			isLeap = true;
			temp = leapDays(retdate.year);
		}
		else
		{
			temp = monthDays(retdate.year, i);
		}
		if(isLeap==true && i==(leap+1)) 
		{
			isLeap = false;
		}
		offset -= temp;
	}
	if(offset==0 && leap>0 && i==leap+1)
	{
		if(isLeap)
		{ 
			isLeap = false;
		}
		else
		{
			isLeap = true;
			--i;
		}
	}
	if(offset<=0)
	{
		offset += temp;
		--i; 
	}
	retdate.month = i;
	retdate.day = offset ;
	retdate.isRunYue=isLeap;
	return retdate;
}