_ftime problem

[Pelle]

Thanks for the update, Robert! Seems to work in two time-zones at least...

Pelle

[tiwag]

Hi Pelle,

timetest also works correct here at my location using CET

WinXP SP2

[Pelle]

Hello tiwag,

Thanks for the info - good to know.

Pelle

[Greg]

The timezone issues with _ftime, localtime etc. are all corrected in the 3.00.0 Beta #1.

Thanks for all your efforts Pele. I'm liking Pelle's C more and more all the time.

[Pelle]

Thanks! That's what I needed - some good news...

Pelle

[Garvan]

Hi Pelle:

_ftime() is still broken in version 3.00.0 beta 1. If fails in time-zones greater than +6 GMT. The timezone returns 0, and UTC time is returned instead of local time.

I tested your posted timetest.exe while in Holland, and it worked, but that was not much of a test, was it? I am in Bangkok (+7GMT) now and it does not work here.

Is the function _tzset(); needed? VC++ seams to work with or without it, and I could not find it in PellesC.

Garvan

[Pelle]

Hello Garvan,

I tested your posted timetest.exe while in Holland, and it worked, but that was not much of a test, was it? I am in Bangkok (+7GMT) now and it does not work here.

Test for me, in the sense that if localtime() is working, there is no fundamental flaw in calculating the timezone offset. If only _ftime() is wrong, I should look in one place for the problem. If also localtime() is wrong, I should look at the "bigger picture". This is why I wanted as many people as possible, from different timezones, to report the results.

Is the function _tzset(); needed? VC++ seams to work with or without it, and I could not find it in PellesC.

According to the docs, the _tzset function uses the current setting of the environment variable TZ to assign values to three global variables.
I have similar code, that checks the environment variable TZ, but it's called automatically - no need to call any _tzset function (if I can't find the TZ variable, I fall back and ask Windows about the "TZ" value, which is the parsed/analyzed).

I tried changing the Windows timezone setting, on my Swedish Windows XP, to various zones over the world (+/- many hours from GMT). It worked for most places, but not for some. I wasn't sure if this is because my Swedish version lacks some "setting files", or if there is a problem *sometimes*.

Pelle

[Greg]

Those functions are all working correctly for me with the 3.00.0 Beta #1.

My timezone is Pacific Standard Time ( GMT-8 )  or TZ=PST8PDT.

[Greg]

Pelle,

May I suggest you post the source code for timetest.exe so people can try it in their time zone and everyone would be using the same code.

[Pelle]

OK, here is the code - I have added a call to gmtime() for completeness.

Pelle

[Greg]

timetest.c returns all the correct values here ( GMT-8 ) using both crt.lib and pocrt.lib version 3.00.0 Beta #1.

[Pelle]

Thanks for the info, Greg. It works here too (GMT+1) - not sure why it fails on some machines.

Pelle

[Greg]

Pelle,

(GMT+1)

You are either up very late or up very early.  

[Pelle]

Way too late... but I promise, I will go to bed now...  :shock:

Pelle

[Garvan]

Hi Pelle:

Sorry for not making my report clearer. localtime is also wrong.

This is a comparison result from running your code compiled with VC and then PellesC in a batch file. I am at GMT+7, using WinXP with the 3.0 beta 1 release.

Thanks

Garvan


VC++
_ftime() reports:
 seconds...........1105680571
 milliseconds......14
 UTC offset........-420 minutes
 daylight saving...No

localtime() reports:
 year..............2005
 month.............1
 day...............14
 hours.............12
 minutes...........29
 seconds...........31
 day of week.......Fri
 day of year.......13
 daylight saving...No

gmtime() reports:
 year.............2005
 month............1
 day..............14
 hours............5
 minutes..........29
 seconds..........31
 day of week......Fri
 day of year......13
 daylight saving..No


-----------
PellesC
_ftime() reports:
 seconds...........1105680571
 milliseconds......34
 UTC offset........0 minutes
 daylight saving...Unknown

localtime() reports:
 year..............2005
 month.............1
 day...............14
 hours.............5
 minutes...........29
 seconds...........31
 day of week.......Fri
 day of year.......13
 daylight saving...Unknown

gmtime() reports:
 year.............2005
 month............1
 day..............14
 hours............5
 minutes..........29
 seconds..........31
 day of week......Fri
 day of year......13
 daylight saving..No