Re: On non-Windows, hard depend on uselocale(3)

On Wed, Nov 20, 2024 at 10:00 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> OK, do you think these three patches tell the _configthreadlocale()
> story properly?  (Then after that we can get back to getting rid of
> it...)

Just by the way, here's another interesting thing I have learned about
the msvcrt->ucrt evolution: ucrt introduced UTF-8 support (ie locales
can use UTF-8 encoding, and all the standard library char functions
work with it just fine like on Unix), but PostgreSQL still believes
that Windows can't do that and has a lot of special code paths to work
with wchar_t and perform extra conversions.  I started nibbling at
that[1], but at the time I was still a bit fuzzy on whether we could
really rip all that old stuff out yet and harmonise with Unix, as I
didn't understand the MinGW/runtime/history situation.  It seems the
coast is now clear, and that would be a satisfying cleanup.  (There's
still non-trivial work to do for that though: we allowed weird
mismatched encoding scenarios just on that OS, and would need to stop
that, which might create some upgrade path problems, needs some
thought, see that thread.)

[1]
https://www.postgresql.org/message-id/CA%2BhUKGJ%3Dca39Cg%3Dy%3DS89EaCYvvCF8NrZRO%3Duog-cnz0VzC6Kfg%40mail.gmail.com