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;





    // 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 = {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 /////////////////////////*/