北京时间、时间戳互转

/*----------------------------------------------------------------
// 文件名：test.cpp;
// 文件功能描述：实现北京时间与时间戳的互转;
// author：杨洲([e-mail]);
// 时间：2018/4/25
//----------------------------------------------------------------*/
#include <stdio.h>

typedef struct NetTime {
	unsigned int year;
	unsigned int month;
	unsigned int day;
	unsigned int hour;
	unsigned int minute;
	unsigned int second;
}NetTime;

//日期转时间戳;
time_t  NetTime2Stamp(NetTime& dt) {
	auto isLeap = [](int _year)->bool {
		return (_year % 4 == 0) &&\
			(_year % 100 != 0) ||\
			(_year % 400 == 0);
	};
	int _days = 0;
	//total year day;
	for (int _index = 1970; _index < dt.year;++_index) {
		_days += isLeap(_index) ? 366 : 365;
	}
	//total month day;
	for (int _index = 1; _index <= dt.month;_index++) {
		if (1==dt.month) {
			break;
		}
		if (_index==dt.month){
			break;
		}
		if (1==_index||\
			3 == _index ||\
			5 == _index || \
			7 == _index || \
			8 == _index || \
			10 == _index || \
			12 == _index) {
			_days += 31;
		}else if (4 == _index || \
			6 == _index || \
			9 == _index || \
			11 == _index) {
			_days += 30;
		}else if (2==_index) {
			_days += isLeap(dt.year)? 29 : 28;
		}
	}
	_days += dt.day - 1;
	return _days * 24 * 60 * 60 + \
		dt.hour * 60 * 60 + \
		dt.minute * 60 + \
		dt.second - 8 * 60 * 60;
}

//时间戳转时间;
NetTime Stamp2NetTime(time_t _stamp) {
	NetTime _netTime = { 0x00 };
	_stamp += 8 * 60 * 60;
	int _remainDays = (_stamp)/(24*60*60)+1;
	int _remainSeconds = (_stamp) % (24 * 60 * 60);
	int _nYear = 1970;
	int _nMonth = 1;
	int _nDay = 1;
	int _nHour, _nMinute, _nSecond = 0;

	auto isLeap = [](int _year)->bool {
		return (_year % 4 == 0) && \
			(_year % 100 != 0) || \
			(_year % 400 == 0);
	};
	//count year;
	while (true) {
		if (isLeap(_nYear)&& _remainDays <=366) {
			break;
		}else if(!isLeap(_nYear) && _remainDays <=365) {
			break;
		}
		if (isLeap(_nYear)) {
			_remainDays -= 366;
		}else {
			_remainDays -= 365;
		}
		_nYear++;
	}
	//count month;
	while (true) {
		if ((1==_nMonth||\
			3 == _nMonth ||\
			5 == _nMonth ||\
			7 == _nMonth ||\
			8 == _nMonth ||\
			10 == _nMonth ||\
			12 == _nMonth)&&_remainDays<=31) {
			break;
		}else if ((4 == _nMonth||\
			6 == _nMonth ||\
			9 == _nMonth ||\
			11 == _nMonth)&&_remainDays<=30) {
			break;
		}else if (isLeap(_nYear)&&2==_nMonth&&_remainDays<=29) {
			break;
		}else if (!isLeap(_nYear) && 2 == _nMonth&&_remainDays <=28) {
			break;
		}
		
		if (1 == _nMonth || \
			3 == _nMonth || \
			5 == _nMonth || \
			7 == _nMonth || \
			8 == _nMonth || \
			10 == _nMonth || \
			12 == _nMonth) {
			_remainDays -= 31;
		}else if (4 == _nMonth || \
			6 == _nMonth || \
			9 == _nMonth || \
			11 == _nMonth) {
			_remainDays -= 30;
		}else if (2==_nMonth) {
			_remainDays -= (isLeap(_nYear)?29:28);
		}
		_nMonth++;
	}

	//count day;
	_nDay = (_nDay>_remainDays)?_nDay:_remainDays;

	//count hour;
	_nHour = _remainSeconds / (60 * 60);
	//count minute;
	_nMinute = (_remainSeconds % (60 * 60)) / 60;
	//count second;
	_nSecond = (_remainSeconds % (60 * 60)) % 60;
	
	_netTime.year = _nYear;
	_netTime.month = _nMonth;
	_netTime.day = _nDay;
	_netTime.hour = _nHour;
	_netTime.minute = _nMinute;
	_netTime.second = _nSecond;
	
	return _netTime;
}

NetTime _arr[] = { \

{ 1970, 1, 1, 8, 0, 0 },\
{ 1970, 1, 1, 23, 59, 59 },\
{ 1970, 2, 28, 0, 0, 0 },\
{ 1970, 2, 28, 23, 59, 59 },\
{ 1970, 3, 1, 0, 0, 0 },\
{ 1970, 3, 1, 23, 59, 59 },\
{ 1970, 12, 31, 0, 0, 0 }, \
{ 1970, 12, 31, 23, 59, 59 }, \

{ 1971, 1, 1, 0, 0, 0 }, \
{ 1971, 1, 1, 23, 59, 59 }, \
{ 1971, 2, 28, 0, 0, 0 }, \
{ 1971, 2, 28, 23, 59, 59 }, \
{ 1971, 3, 1, 0, 0, 0 }, \
{ 1971, 3, 1, 23, 59, 59 }, \
{ 1971, 12, 31, 0, 0, 0 }, \
{ 1971, 12, 31, 23, 59, 59 },\

{ 1972, 1, 1, 0, 0, 0 }, \
{ 1972, 1, 1, 23, 59, 59 }, \
{ 1972, 2, 29, 0, 0, 0 }, \
{ 1972, 2, 29, 23, 59, 59 }, \
{ 1972, 3, 1, 0, 0, 0 }, \
{ 1972, 3, 1, 23, 59, 59 }, \
{ 1972, 12, 31, 0, 0, 0 }, \
{ 1972, 12, 31, 23, 59, 59 }, \

{ 1973, 1, 1, 0, 0, 0 }, \
{ 1973, 1, 1, 23, 59, 59 }, \
{ 1973, 2, 28, 0, 0, 0 }, \
{ 1973, 2, 28, 23, 59, 59 }, \
{ 1973, 3, 1, 0, 0, 0 }, \
{ 1973, 3, 1, 23, 59, 59 }, \
{ 1973, 12, 31, 0, 0, 0 }, \
{ 1973, 12, 31, 23, 59, 59 }, \

{ 2000, 1, 1, 0, 0, 0 }, \
{ 2000, 1, 1, 23, 59, 59 }, \
{ 2000, 2, 29, 0, 0, 0 }, \
{ 2000, 2, 29, 23, 59, 59 }, \
{ 2000, 3, 1, 0, 0, 0 }, \
{ 2000, 3, 1, 23, 59, 59 }, \
{ 2000, 12, 31, 0, 0, 0 }, \
{ 2000, 12, 31, 23, 59, 59 }, \

{ 2001, 1, 1, 0, 0, 0 }, \
{ 2001, 1, 1, 23, 59, 59 }, \
{ 2001, 2, 28, 0, 0, 0 }, \
{ 2001, 2, 28, 23, 59, 59 }, \
{ 2001, 3, 1, 0, 0, 0 }, \
{ 2001, 3, 1, 23, 59, 59 }, \
{ 2001, 12, 31, 0, 0, 0 }, \
{ 2001, 12, 31, 23, 59, 59 }, \

{ 2002, 1, 1, 0, 0, 0 }, \
{ 2002, 1, 1, 23, 59, 59 }, \
{ 2002, 2, 28, 0, 0, 0 }, \
{ 2002, 2, 28, 23, 59, 59 }, \
{ 2002, 3, 1, 0, 0, 0 }, \
{ 2002, 3, 1, 23, 59, 59 }, \
{ 2002, 12, 31, 0, 0, 0 }, \
{ 2002, 12, 31, 23, 59, 59 },

{ 2012, 1, 1, 0, 0, 0 }, \
{ 2018, 10, 1, 23, 59, 59 }, \
{ 1998, 2, 28, 13, 59, 34 }, \
{ 2020, 2, 29, 23, 59, 59 }, \
{ 2008, 3, 1,0, 0, 0 }, \
{ 2033, 3, 1, 23, 59, 59 }, \
{ 2005, 12, 31, 0, 0, 0 }, \
{ 2003, 12, 31, 23, 59, 59 }
};

int main(int args, char* argv[]) {
	for (int _index = 0; _index < sizeof(_arr)/sizeof(NetTime); _index++) {
		time_t _stamp = NetTime2Stamp(_arr[_index]);
		printf("timeStamp: %ld; ", _stamp);

		NetTime _resTime = Stamp2NetTime(_stamp);
		char show[512] = { 0x00 };
		sprintf_s(show, 512, "%d-%02d-%02d %02d:%02d:%02d", _resTime.year, \
			_resTime.month, \
			_resTime.day, \
			_resTime.hour, \
			_resTime.minute, \
			_resTime.second);
		printf("time: %s\n", show);
		if (0==(_index+1)%8) {
			printf("\n");
		}
	}
	getchar();
	return 0;
} 

运行结果：