#include <Time.h>

#define YEAR 2010
const int days[12]={31,28,31,30,31,30,31,31,30,31,30,31};
/*******************************************************************************
* Function Name : isLeapYear
* Description : ÅжÏÊÇ·ñΪÈòÄê
* Input : Äê·Ý
* Output : None
* Return : ÅжϽá¹û
*******************************************************************************/
unsigned char isLeapYear(unsigned short year)
{
if( ( (year%4==0) && (year%100!=0) ) || (year%400==0) )
{
return 1;
}

return 0;
}

/*******************************************************************************
* Function Name : Date2Sec
* Description : ÈÕÆÚʱ¼äת³É2000Äê1ÔÂ1ÈÕÆðʼµÄÃëÊý (ÓÐЧʱ¼äΪ2000¡«2135Äê)
* Input : ÈÕÆÚʱ¼ä½á¹¹Ìå
* Output :
* Return : ÃëÊý
*******************************************************************************/
unsigned long Calendar_Date2Sec(tm d)
{
unsigned long sum = 0; //×ÜÃëÊý
unsigned short i;

//ÀÛ¼ÆÒÔÍù¸÷ÄêµÄÌìÊý
for(i=YEAR; i<d.tm_year; i++)
{
sum += 365;
if(isLeapYear(i))
{//ÈòÄê¶àÒ»Ìì
sum += 1;
}
}

//ÀۼƵ±ÄêÒÔÍù¸÷ÔµÄÌìÊý
for(i=1; i<d.tm_mon; i++)
{
sum += days[i-1];
}

if(d.tm_mon>2)
{
if(isLeapYear(d.tm_year))
{//ÈòÄê¶àÒ»Ìì
sum += 1;
}
}

//ÀۼƵ±Äêµ±ÔµÄÕûÌìÊý
sum += d.tm_mday-1;

//ת»»³ÉÃë
sum = sum*24*60*60;

//¼Óµ±ÌìµÄСʱ£¬·ÖÖÓ£¬Ãë
sum += d.tm_hour*60*60 + d.tm_min*60 + d.tm_sec;

//·µ»Ø×ÜÃëÊý
return sum;
}

/*******************************************************************************
* Function Name : Sec2Date
* Description : 2000Äê1ÔÂ1ÈÕÆðÃëÊýת³ÉÈÕÆÚʱ¼ä (ÓÐЧʱ¼äΪ2000¡«2135Äê)
* ʱ¼ä×ßµ½2136-02-07 06:28:15»á·µ»Ø2000ÄêÆðʼʱ¼ä
* Input : ÃëÊý
* Output : ÈÕÆÚʱ¼ä½á¹¹Ìå
* Return :
*******************************************************************************/
tm Calendar_Sec2Date(unsigned long sec)
{
tm d={YEAR,1,1,0,0,0};
unsigned short ds,sum;

ds=sec/(24*60*60); //¾­¹ýµÄÌìÊý

sec-=ds*(24*60*60); //²»¹»1ÌìµÄÃëÊý
d.tm_hour=sec/(60*60); //Сʱ

sec-=d.tm_hour*(60*60);
d.tm_min=sec/60; //·ÖÖÓ

sec-=d.tm_min*60;
d.tm_sec=sec; //ÃëÖÓ

//¼ÆËãÓжàÉÙÄê
while(1)
{
sum=365;

if(isLeapYear(d.tm_year))
{//ÈòÄê¶àÒ»Ìì
sum+=1;
}

if(ds<sum)
{//²»×ãÒ»ÄêÁË
break;
}

d.tm_year++;
ds-=sum;
}

//¼ÆËãÓжàÉÙÔÂ
while(1)
{
sum=days[d.tm_mon-1];

if(d.tm_mon==2)
{
if(isLeapYear(d.tm_year))
{//ÈòÄê¶àÒ»Ìì
sum += 1;
}
}

//if(ds+1<sum) 2009/7/17Ð޸ģ¬Ôµ×ÌìÊýÒç³ö»á³ö´í
if(ds < sum)
{//²»×ãÒ»ÔÂÁË
d.tm_mday+=ds;
break;
}

d.tm_mon++;
ds-=sum;
}

//¼ÆËãÐÇÆÚ¼¸ 0-ÐÇÆÚÈÕ,...,6-ÐÇÆÚÁù
if (d.tm_mon==1 || d.tm_mon==2)

d.tm_wday = (d.tm_mday + 2*(d.tm_mon+12) + 3*(d.tm_mon+13)/5 + d.tm_year + ((d.tm_year-1)/4) - (d.tm_year-1)/100 + (d.tm_year-1)/400) % 7;

else

d.tm_wday = (d.tm_mday + 1 + 2*d.tm_mon + 3*(d.tm_mon+1)/5 + d.tm_year + (d.tm_year/4) - d.tm_year/100 + d.tm_year/400) % 7;

return d;
}