Neither a GMT adjustment nor DST account for the difference entirely as the following code illustrates. Also 1 seconds adjustments, such as we might use for versioning don't work properly, either. The GMT adjustment alone will probably be good enough for most purposes.
If so inclined reply to [email protected] * clear * STRTOFILE("Nolly","test.txt") ? FileTouch("test.txt",DATETime(2007,2,7),-5) && My birthday, EST ? FileTouch("test.txt",DATETime(2007,2,7)+1,-5) && 1 second adjust ? FileTouch("test.txt",DATETime(2007,2,7)+2,-5) && 2 second adjust ? FileTouch("test.txt",DATETime(2007,2,7)+3,-5) && 3 sec adjust * ADIR(aFoo,"test.txt") * DISPLAY MEMORY LIKE afoo FUNCTION FileTouch LPARAMETERS cFileName, tNewTime, nGMTAdjustment LOCAL nYear, nMonth, nDay, nHour, nMinutes, nSeconds * Turn adjustment hours into seconds nGMTAdjustment = (nGMTAdjustment * 60 * 60) * Convert tNewTime into the adjusted time tNewTime = tNewTime + nGMTAdjustment * Parse out the FoxTouch() parameter components nYear = YEAR(tNewTime) nMonth = MONTH(tNewTime) nDay = DAY(tNewTime) nHour = HOUR(tNewTime) nMinutes = MINUTE(tNewTime) nSeconds = SEC(tNewTime) Set Library to ("c:\vfp projects\framework\flls\FoxTools.fll") FoxTouch(cFileName, nYear, nMonth, nDay, nHour, nMinutes, nSeconds) RETURN FDATE(cFileName,1) On Mar 16, 2009 5:21pm, Dan Olsson <[email protected]> wrote: > At 2009-03-17 03:15, Malcolm wrote: > >BTW: I think(?) the reason for the 4 vs. 5 hour time difference is > >due to variations in how daylights saving time is applied, eg. if > >you're using 4 hours now, you may need to change this to 5 hours at > >some point in the future and then plan on making a similar > >adjustment when we set the clocks back in the fall. > Yes, the function does not know about DST > Some docs at http://support.microsoft.com/kb/114949 > ****************************** > * Dan Olsson > * [email protected]> > * http://www.dolittle.se> > _______________________________________________ > Post Messages to: [email protected] > Subscription Maintenance: > OT-free" target="_blank">http://leafe.com/mailman/listinfo/profox > OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech > Searchable Archive: http://leafe.com/archives/search/profox > This message: > http://leafe.com/archives/byMID/profox/[email protected] > ** All postings, unless explicitly stated otherwise, are the opinions of > the author, and do not constitute legal or medical advice. This statement > is added to the messages for those lawyers who are too stupid to see the > obvious. > Report [OT] Abuse: > http://leafe.com/reportAbuse/[email protected] --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[email protected] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
