GMT time...

BlitzMax Forums/BlitzMax Beginners Area/GMT time...

degac

(Posted 2007) [#1]

I think this is the strangest question ever made on this forum....How I can check (via Bmax) the 'local time', I mean the offset by GMT?
For example in Italy the GMT is +1...
I have a little problem when I try to convert the timestamp to a 'human' time...
Thanks in advance

Dreamora

(Posted 2007) [#2]

Ask via API what timezone the user choose.

ImaginaryHuman

(Posted 2007) [#3]

Or ask the user yourself what timezone they're in.

degac

(Posted 2007) [#4]

Ok. thanks

Brucey

(Posted 2007) [#5]

There are various API calls available on all the platforms for finding out this kind of information.

Google is your friend ;-)

degac

(Posted 2007) [#6]

Hi, after digging in Internet for 2 days...


'Time, day of the week, Time_Zone_Information (bad)

Import "-lkernel32"

Type TIME_ZONE_INFORMATION 'I hope it's works!!!!
	Field bias:Int
	Field standardname:String
	Field date:tsystemtime
	Field daylightname:String
	Field daylightdate:tSystemTime
	Field daylightbias:Long
End Type

Type TSYSTEMTIME 
Field wYear@@
Field wMonth@@
Field wDayOfWeek@@
Field wDay@@
Field wHour@@
Field wMinute@@
Field wSecond@@
Field wMilliseconds@@
End Type

' Must have "Win32" since windows API
Global GetLocalTime(timeBuffer:Byte Ptr) "Win32"
Global GetTimeZoneInformation:Short(timebuffer:Byte Ptr) "Win32"

kernel32 = LoadLibraryA("kernel32.dll")

If Kernel32
	getlocaltime = GetProcAddress(kernel32 , "GetLocalTime")
	GetTimeZoneInformation=GetProcAddress(kernel32,"GetTimeZoneInformation")
Else
	Notify("No lib")
EndIf

Local gmt:time_zone_information = New time_zone_information
GetTimeZoneInformation(gmt)
Print "GMT: " + Float(gmt.bias)/ -60 'don't ask me why negative...

Local time:tSystemTime = New tSystemTime
GetLocalTime(time)
Print "Year       : " + time.wYear
Print "Month       : " + time.wMonth
Print "Day of Week : " + time.wDayOfWeek
Print "Day         : " + time.wDay
Print "H M S       : " + time.wHour + ":" + time.wMinute + ":" + time.wSecond

I can recover (from GetLocalTime) only the GMT (what I'm looking for) but the others info are not correctly interpreted...Well at last it works!!!!
My only problem is: there is another syntax for using API (extern and end extern), but I have encounterd too much error...maybe it's due to the 'size' of the parameters I passed to the functions...

When I have a little time I'm starting digging again to find info for the Mac version....

Gabriel

(Posted 2007) [#7]

What's the @@ after the fields of TSYSTEMTIME? Is tha the quick way of declaring a short? ( It's not listed as such in the docs, but that's no guarantee. )

degac

(Posted 2007) [#8]

Yes @@ --> :short, I found this after digging for 2 days...(and after many trial&errors...) I'm not a C++ expert so many C structures refers to word, uword, char & so on...It's a pain for my little brain

Sub_Zero

(Posted 2007) [#9]

Handy code.

You'll get used to it :)

Perturbatio

(Posted 2007) [#10]

Speaking of C, could you not do a multi-platform version with these?
(not sure if the declarations are exactly right, I can't quite get it working properly)

Type tm
	Field tm_sec:Int
	Field tm_min:Int
	Field tm_hour:Int
	Field tm_mday:Int
	Field tm_mon:Int
	Field tm_year:Int
	Field tm_wday:Int
	Field tm_yday:Int
	Field tm_isdst:Int
	Field tm_gmtoff:Long
	Field tm_zone:Byte Ptr
End Type


Type time_t
	Field hour:Byte
	Field minute:Byte
	Field second:Byte
	Field hsecond:Byte
End Type

Extern "C"
	Function localtime:tm(time:Byte Ptr) = "localtime"
	Function time:time_t(time:Byte Ptr) = "time"
End Extern

klepto2

(Posted 2007) [#11]

Maybe you could use this:
http://klepto2.kl.funpic.de/include.php?path=content/download.php&contentid=14&download=go

It is a ext Time Module which now also supports Microunix time
and it is easy to use.

Yan	(Posted 2007) [#12]

Import pub.stdc

Extern "C"
	Function gmtime_:Byte Ptr(time:Byte Ptr) = "gmtime"
End Extern

Local calendarTime[1], buff:Byte[256]

time_(calendarTime)

strftime_(buff, buff.length, "%A %d %B %Y - %H:%M:%S (%Z)", localtime_(calendarTime))
Print String.FromCString(buff)

strftime_(buff, buff.length, "%A %d %B %Y - %H:%M:%S", gmtime_(calendarTime))
Print String.FromCString(buff) + " (GMT Standard Time)"

degac

(Posted 2007) [#13]

wtf!!! all this work for something there is already?!??! arghhhhhhhh.....
:(
well something new to understand, thanks anyway.

Sub_Zero

(Posted 2011) [#14]

what about getting the current unix timestamp for current time??
I mean without writing a temporary file and then filetime it to get the current timestamp.....

Any ideas anyone?

Last edited 2011

Sub_Zero

(Posted 2011) [#15]

bump

TaskMaster

(Posted 2011) [#16]


Extern "c"
	Function time(timer:Byte Ptr)
End Extern

debuglog time(Null)

Last edited 2011

Yan	(Posted 2011) [#17]

In the above code, calenderTime *is* unix time*...

unixTime = time_(Null)
...OR...
time_(Varptr(unixTime))

*I just used a weird ass method of getting a integer pointer. :o|

[edit]
Taskmaster beat me to it...That's what happens when you try to post whilst watching 'Robinson Crusoe On Mars' on youtube. ;o)
[/edit]

Last edited 2011

Sub_Zero

(Posted 2011) [#18]

Thanks alot... for those nifty little tips ;-)