Windows FILETIME结构是否包含闰秒？

根据Microsoft文档,该FILETIME结构从1601年1月1日开始计算(可能是当天的开始),但是这包括闰秒吗？

问题不应该是FILETIME包括闰秒.

它应该是:

在计算持续时间时,解释FILETIME(即FileTimeToSystemTime)的人,函数和库是否包括闰秒？

简单的答案是"不".FileTimeToSystemTime返回秒数为0..59.

更简单的答案是:" 当然不是,怎么可能？ ".

我的Windows 2000机器不知道自发布以来的十年间增加了2个闰秒.它对a的任何解释FILETIME都是错误的.

最后,我们可以通过直接的实验观察来确定海报问题的答案,而不是依赖逻辑:

var
    systemTime: TSystemTime;
    fileTime: TFileTime;
begin
    //Construct a system-time for the 12/31/2008 11:59:59 pm
    ZeroMemory(@systemTime, SizeOf(systemTime));
    systemtime.wYear := 2008;
    systemTime.wMonth := 12;
    systemTime.wDay := 31;
    systemTime.wHour := 23;
    systemtime.wMinute := 59;
    systemtime.wSecond := 59;

    //Convert it to a file time
    SystemTimeToFileTime(systemTime, {var}fileTime);

    //There was a leap second 12/31/2008 11:59:60 pm
    //Add one second to our filetime to reach the leap second
    filetime.dwLowDateTime := fileTime.dwLowDateTime+10000000; //10,000,000 * 100ns = 1s

    //Convert the filetime, sitting on a leap second, to a displayable system time
    FileTimeToSystemTime(fileTime, {var}systemTime);

    //And now print the system time
    ShowMessage(DateTimeToStr(SystemTimeToDateTime(systemTime)));

12/31/2008 11:59:59pm

1/1/2009 12:00:00am

1/1/2009 11:59:60pm