[Development] [Win32 API] Windows 8.1 deprectaed GetVersion(Ex) -> QSysInfo should be fixed!

[Pau Garcia i Quiles]

Hello,

As a quickfix, this also works:

#if defined(_MSC_VER) && (_MSC_VER >= 1800)
#pragma warning (disable:4996)
#endif




On Sun, Oct 20, 2013 at 3:56 PM, MuldeR <mulder2 at gmx.de> wrote:

>  Hello.
>
> As you might have read, with Windows 8.1, the GetVersion(Ex) API has been
> deprecated by Microsoft and will now pretend to be Windows 8.0 (NT v6.2),
> even when running under Windows 8.1 (NT v6.3). And yes, officiallay and in
> other API's, Windows 8.1 *is* NT v6.3.
>
> See here for details:
> http://msdn.microsoft.com/en-us/library/windows/desktop/dn302074.aspx
>
> Microsoft says that they did this in order to prevent compatibility
> problems. I think it is a horrible idea to break the API in that way. It
> is also the reason why Qt happily detects Windows 8.1 as Windows 8.
> Actually Qt should detect an “unknown” operating system, since there is no
> 8.1 (NT v6.3 )detection code yet - I have checked latest version in Git.
> But Qt detects NT v6.2, thanks to Microsoft's GetVersion(Ex) hack. In other
> words: QSysInfo::windowsVersion() reports *wrong* info, starting with
> (and probably not limited to) Windows 8.1.
>
> So let's fix QSysInfo!
>
> I have pulled together a solution that is based on the VerifyVersionInfo()
> API, which has not been broken, fortunately. Basically, we first call
> GetVersionEx() to get the "fake" version as a starting point. Then we try
> to increase the version numbers from there, calling VerifyVersionInfo()
> each time in order to make sure we did not exceed the *real* version. End
> result will be the maximum supported version, i.e. the *real* version
> number.
>
>
> Code is here:
> http://pastie.org/private/kkva8pkk7nzcmm8jjwstfa
>
> Tested on: Windows XP (RTM), Windows 7 SP-1, Windows 8.0, Windows 8.1
>
> (should work on Windows 2000 too, but I don't really care)
>
>
> Output on Windows 7:
>
> (Fake) Windows Version: 6.1
> Trying to verify: 7.0 -->NO
> Trying to verify: 6.2 -->NO
> *Real* Windows Version: 6.1
>
>
> Output on Windows 8.0:
>
> > (Fake) Windows Version: 6.2
> > Trying to verify: 7.0 -->NO
> > Trying to verify: 6.3 -->NO
> > *Real* Windows Version: 6.2
>
>
> Output on Windows 8.1:
>
> (Fake) Windows Version: 6.2
> Trying to verify: 7.0 -->NO
> Trying to verify: 6.3 -->YES
> Trying to verify: 6.4 -->NO
> *Real* Windows Version: *6.3*
>
>
>
> Regards,
> MuldeR
>
>
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>
>


-- 
Pau Garcia i Quiles
http://www.elpauer.org
(Due to my workload, I may need 10 days to answer)
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