Does QDir impose a maximum path limit on Windows?

[Maarten Verhage]

Dear Qt experts,

I was reading through Qt Assistant 5.3.2 and I didn't found info on this topic. I'm using Windows 7 SP1 64-bit. According to the Windows API functions the unicode versions of the functions like CreateFileW have a path limit of 32,767 wide characters when the path is prepended with "\\?\". Does Qt call the winapi functions with this prepend? I hope QDir isn't limited by MAX_PATH of 260 characters. But I think I still have the responsibility not to exceed the number of 32,767 for Qt development on Windows, right?

Thank you very much for your attention and time!
Best regards,
Maarten

[kshegunov]

@Maarten-Verhage said in Does QDir impose a maximum path limit on Windows?:

When the path is prepended with "\?". Does Qt call the winapi functions with this prepend?

Yes, here and here.

But I think I still have the responsibility not to exceed the number of 32,767 for Qt development on Windows, right?

As far as I can see in the source, yes, you do.

[RokeJulianLockhart]

@kshegunov, does this override LongPathsEnabled's MAX_PATH bypass for non-NT Object Manager, Win32 Device Namespace, and/or UNC paths? I ask for github.com/Murmele/Gittyup/issues/827.

[kshegunov]

Shouldn't, but I don't know.
As far as links go, these seem to point to a newer version of the code. Bear in mind the original post was 7 years ago ...