How to format a Unix timestamp in Delphi?

Question

I have

var timestamp: Longint;  
timestamp := Round((Now() - 25569.0 {Unix start date in Delphi terms} ) * 86400);

which I am using as a prima

Answer 1

I would use DateTimeToUnix, as suggested by @kludg.

function DateTimeToUnix(const AValue: TDateTime): Int64;

In case you want the current Unix timestamp in milliseconds format, you can implement the following function:

function UNIXTimeInMilliseconds: Int64;
var
  DateTime: TDateTime;
  SystemTime: TSystemTime;
begin
  GetSystemTime(SystemTime);
  DateTime := SysUtils.EncodeDate(SystemTime.wYear, SystemTime.wMonth, SystemTime.wDay) +
        SysUtils.EncodeTime(SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond, SystemTime.wMilliseconds);
  Result := DateUtils.MilliSecondsBetween(DateTime, UnixDateDelta);
end;