Function TimeTToDateTimeStr(TimeT : Integer) : String;
Const UnixDateDelta = 25569; { days between 12/31/1899 and 1/1/1970 }
Var
DT : TDateTime;
TZ : TTimeZoneInformation;
Res : DWord;
Begin
If (TimeT = 0) Then Result := ''
Else Begin
{ Unix TIME_T is secs since 1/1/1970 }
DT := UnixDateDelta+(TimeT / (24*60*60)); { in UTC }
{ calculate bias }
Res := GetTimeZoneInformation(TZ);
If (Res = TIME_ZONE_ID_INVALID) Then RaiseLastWin32Error;
If (Res = TIME_ZONE_ID_STANDARD) Then Begin
DT := DT-((TZ.Bias+TZ.StandardBias) / (24*60));
Result := DateTimeToStr(DT)+' '+WideCharToString(TZ.StandardName);
End
Else Begin { daylight saving time }
DT := DT-((TZ.Bias+TZ.DaylightBias) / (24*60));
Result := DateTimeToStr(DT)+' '+WideCharToString(TZ.DaylightName);
End;
End;
End;
Const UnixDateDelta = 25569; { days between 12/31/1899 and 1/1/1970 }
Var
DT : TDateTime;
TZ : TTimeZoneInformation;
Res : DWord;
Begin
If (TimeT = 0) Then Result := ''
Else Begin
{ Unix TIME_T is secs since 1/1/1970 }
DT := UnixDateDelta+(TimeT / (24*60*60)); { in UTC }
{ calculate bias }
Res := GetTimeZoneInformation(TZ);
If (Res = TIME_ZONE_ID_INVALID) Then RaiseLastWin32Error;
If (Res = TIME_ZONE_ID_STANDARD) Then Begin
DT := DT-((TZ.Bias+TZ.StandardBias) / (24*60));
Result := DateTimeToStr(DT)+' '+WideCharToString(TZ.StandardName);
End
Else Begin { daylight saving time }
DT := DT-((TZ.Bias+TZ.DaylightBias) / (24*60));
Result := DateTimeToStr(DT)+' '+WideCharToString(TZ.DaylightName);
End;
End;
End;
博客展示了TimeTToDateTimeStr函数,用于将Integer类型的Unix时间转换为String类型的日期时间。函数考虑了Unix时间起始点和时区信息,根据不同的时区状态(标准时间或夏令时)进行计算,最终返回包含日期时间和时区名称的字符串。
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