SystemTimeToFileTime、FileTimeToLocalFileTime、LocalFileTimeToFileTime三函数的跨平台实现

// test.cpp : 定义控制台应用程序的入口点。

//

#include "stdafx.h"

#include <stdlib.h>

#include <stdio.h>

#include <time.h>

#include <windows.h>

typedef struct

{

int year;

int month;

int day;

}S_DATE, *PS_DATE;

bool IsLeafYear(int year)

{

if((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) // 闰年的计算，归结起来就是通常说的：四年一闰；百年不闰,四百年再闰。

{

return true; // 是闰年

}

else

{

return false; // 不是闰年

}

}

bool IsValidDate(const S_DATE &date)

{

if(2 == date.month)

{

if(IsLeafYear(date.year))

{

if (date.day > 29 || date.day <= 0)

{

return false;

}

}

else

{

if (date.day > 28 || date.day <= 0)

{

return false;

}

}

}

else if(4 == date.month || 6 == date.month || 9 == date.month || 11 == date.month)

{

if (date.day > 30 || date.day <= 0)

{

return false;

}

}

else

{

if (date.day > 31 || date.day <= 0)

{

return false;

}

}

return true;

}

int PassDay(const S_DATE &date) // 该年的第几天(包含闰年+1)

{

// 方法1:

int day = date.day;

int i;

for(i = 1; i < date.month; i++)

{

if(2 == i)

{

if(IsLeafYear(date.year))

{

day += 29;

}

else

{

day += 28;

}

}

else if(4 == i || 6 == i || 9 == i || 11 == i)

{

day += 30;

}

else

{

day += 31;

}

}

return day;

// 方法2:

/*struct tm _tm;

::memset(&_tm, 0, sizeof(_tm));

_tm.tm_year = date.year - 1900;

_tm.tm_mon = date.month - 1;

_tm.tm_mday = date.day;

::mktime(&_tm);

return _tm.tm_yday;*/

}

#include <windef.h>

void GetDayDiff(const S_DATE &date1, const S_DATE &date2, int &daydiff) // 获取两日期间相隔天数（date1为小日期，date2为大日期）

{

if(date1.year == date2.year)

{

daydiff = PassDay(date2) - PassDay(date1);

}

else if (date1.year > date2.year)

{

if (IsLeafYear(date2.year))

{

daydiff = PassDay(date1) + (366 - PassDay(date2));

}

else

{

daydiff = PassDay(date1) + (365 - PassDay(date2));

}

// 两日期年份相差大于一年的情况

if (date1.year - date2.year > 1)

{

int i = date1.year - 1;

for (; i > date2.year; i--)

{

if (IsLeafYear(i))

{

daydiff += 366;

}

else

{

daydiff += 365;

}

}

}

daydiff = -daydiff;

}

else

{

if (IsLeafYear(date1.year))

{

daydiff = PassDay(date2) + (366 - PassDay(date1));

}

else

{

daydiff = PassDay(date2) + (365 - PassDay(date1));

}

// 两日期年份相差大于一年的情况

if (date2.year - date1.year > 1)

{

int i = date2.year - 1;

for (; i > date1.year; i--)

{

if (IsLeafYear(i))

{

daydiff += 366;

}

else

{

daydiff += 365;

}

}

}

}

}

BOOL SystemTimeToFileTime2(__in CONST SYSTEMTIME *lpSystemTime, __out LPFILETIME lpFileTime)

{

if (NULL == lpSystemTime || NULL == lpFileTime)

return FALSE;

S_DATE date1 = {1601, 1, 1};

S_DATE date2 = {lpSystemTime->wYear, lpSystemTime->wMonth, lpSystemTime->wDay};

int nDiff = 0;

GetDayDiff(date1, date2, nDiff);

ULONGLONG ull = (ULONGLONG)nDiff * 24 * 60 * 60 * 1000 * 1000 * 10; // 单位为100ns

ull += ((ULONGLONG)lpSystemTime->wHour * 60 * 60 * 1000 * 1000 * 10);

ull += ((ULONGLONG)lpSystemTime->wMinute * 60 * 1000 * 1000 * 10);

ull += ((ULONGLONG)lpSystemTime->wSecond * 1000 * 1000 * 10);

ull += ((ULONGLONG)lpSystemTime->wMilliseconds * 1000 * 10);

lpFileTime->dwHighDateTime = (ull & 0XFFFFFFFF00000000) >> 32;

lpFileTime->dwLowDateTime = ull & 0X00000000FFFFFFFF;

return TRUE;

}

BOOL FileTimeToLocalFileTime2(__in CONST FILETIME *lpFileTime, __out LPFILETIME lpLocalFileTime)

{

if (NULL == lpFileTime || NULL == lpLocalFileTime)

return FALSE;

// 获取时区

time_t tt = 0;

struct tm *ptm = NULL;

tt = ::time(&tt);

ptm = ::localtime(&tt);

int nHourLocal = ptm->tm_hour;

ptm = ::gmtime(&tt);

int nHourUTC = ptm->tm_hour;

int nTimeZoom = nHourLocal - nHourUTC;

ULARGE_INTEGER uli = {lpFileTime->dwLowDateTime, lpFileTime->dwHighDateTime};

uli.QuadPart += ((ULONGLONG)nTimeZoom * 60 * 60 * 1000 * 1000 * 10);

lpLocalFileTime->dwLowDateTime = uli.LowPart;

lpLocalFileTime->dwHighDateTime = uli.HighPart;

return TRUE;

}

BOOL LocalFileTimeToFileTime2(__in CONST FILETIME *lpLocalFileTime, __out LPFILETIME lpFileTime)

{

if (NULL == lpLocalFileTime || NULL == lpFileTime)

return FALSE;

ULARGE_INTEGER uli = {lpLocalFileTime->dwLowDateTime, lpLocalFileTime->dwHighDateTime};

uli.QuadPart -= ((ULONGLONG)nTimeZoom * 60 * 60 * 1000 * 1000 * 10);

lpFileTime->dwLowDateTime = uli.LowPart;

lpFileTime->dwHighDateTime = uli.HighPart;

return TRUE;

}

int main()

{

SYSTEMTIME stLocal, stUTC;

FILETIME ftLocal, ftUTC, ftLocal2, ftUTC2;

ULARGE_INTEGER uliLocal, uliUTC, uliLocal2, uliUTC2;

::GetLocalTime(&stLocal); // 获取本地时间

::GetSystemTime(&stUTC); // 获取UTC时间

printf("Local System Time: %d-%d-%d %d:%d:%d\n", stLocal.wYear, stLocal.wMonth,

stLocal.wDay, stLocal.wHour, stLocal.wMinute, stLocal.wSecond);

printf("UTC System Time : %d-%d-%d %d:%d:%d\n\n", stUTC.wYear, stUTC.wMonth,

stUTC.wDay, stUTC.wHour, stUTC.wMinute, stUTC.wSecond);

SystemTimeToFileTime2(&stLocal, &ftLocal); // 本地时间转化成FILETIME结构

SystemTimeToFileTime2(&stUTC, &ftUTC); // UTC时间转化成FILETIME结构

uliLocal.LowPart = ftLocal.dwLowDateTime;

uliLocal.HighPart = ftLocal.dwHighDateTime;

uliUTC.LowPart = ftUTC.dwLowDateTime;

uliUTC.HighPart = ftUTC.dwHighDateTime;

printf("Local File Time : %llu\n", uliLocal.QuadPart);

printf("UTC File Time : %llu\n", uliUTC.QuadPart);

printf("Diff File Time : %llu = 8*60*60*1000*1000*10(单位为100ns)\n\n", uliLocal.QuadPart - uliUTC.QuadPart);

FileTimeToLocalFileTime2(&ftUTC, &ftLocal2); // 将UTC的FILETIME时间转换为相应的本地的FILETIME时间。

LocalFileTimeToFileTime2(&ftLocal, &ftUTC2); // 将本地的FILETIME时间转换为相应的UTC的FILETIME时间。

uliLocal2.LowPart = ftLocal2.dwLowDateTime;

uliLocal2.HighPart = ftLocal2.dwHighDateTime;

uliUTC2.LowPart = ftUTC2.dwLowDateTime;

uliUTC2.HighPart = ftUTC2.dwHighDateTime;

printf("Local File Time from UTC File Time : %llu\n", uliLocal2.QuadPart);

printf("UTC File Time from Local File Time : %llu\n\n", uliUTC2.QuadPart);

system("pause");

return EXIT_SUCCESS;

}

/*/ 执行打印開始 //

Local System Time: 2014-7-6 18:11:37

UTC System Time : 2014-7-6 10:11:37

Local File Time : 130491438974890000

UTC File Time : 130491150974890000

Diff File Time : 288000000000 = 8*60*60*1000*1000*10(单位为100ns)

Local File Time from UTC File Time : 130491438974890000

UTC File Time from Local File Time : 130491150974890000

请按随意键继续. . .

// 执行打印结束 /*/

转载于:https://www.cnblogs.com/zfyouxi/p/3872465.html

原文链接：https://blog.csdn.net/weixin_30342827/article/details/98164393

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