tree fd4108a0a2cfa6b273ee47d9b681858613f804fd
parent 593edf7732ed66ec8e6e1e0e6c8afec3ec676e46
author Martin Storsjö <martin@martin.st> 1604501947 +0200
committer Copybara-Service <copybara-worker@google.com> 1612517143 -0800

[libcxx] Implement the stat function family on top of native windows APIs

While the windows CRTs (the modern UCRT, and the legacy msvcrt.dll
that mingw still often defaults to) do provide stat functions, they're
a bit lacking - they only provide second precision on the modification
time, lack support for symlinks and a few other details.

Instead reimplement them using a couple windows native functions,
getting exactly the info we need. (Technically, the implementation
within the CRT calls these functions anyway.)

If we only need a few fields, we could also do with fewer calls, as a
later optimization.

Differential Revision: https://reviews.llvm.org/D91141

GitOrigin-RevId: 2ff8662b5d16129ec6d1ee60dcec4f6ff8f717e2