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Message-ID: <CAJgzZoqGqE29HygV5o+AEAPLyUt5qFL9f66S-3ywvCD7Ngu6qA@mail.gmail.com>
Date: Thu, 15 Jun 2023 10:03:44 -0700
From: enh <enh@...gle.com>
To: Paul Eggert <eggert@...ucla.edu>
Cc: libc-coord@...ts.openwall.com
Subject: Re: thread-safe localtime() for an arbitrary timezone
On Wed, Jun 14, 2023 at 11:19 AM Paul Eggert <eggert@...ucla.edu> wrote:
> On 6/14/23 11:06, enh wrote:
> > is anyone aware of any standardization work in this area? i know netbsd
> > has tzalloc()/localtime_rz()/tzfree() (and tzcode has implementations),
> but
> > they're the only ones who've shipped anything, right? and there's no
> > in-progress work on any alternative?
>
> On my long list of things to do has been to implement the tzcode API in
> glibc. Nothing publishable, alas.
>
> The tzcode API differs slightly from NetBSD's with, as I recall, the
> blessing of the NetBSD implementer in question, so I hope it would be a
> better point of departure. (Also on my list of things to do is to merge
> tzcode's back into NetBSD....)
>
any thoughts on either renaming `struct state` (i went with `struct
__timezone_t` to match the typedef to timezone_t for the pointer) or having
a knob for that (i added a `#define state __timezone_t` in the `#if
NETBSD_INSPIRED` in private.h)? why do i care? because tzcode pulls in the
system <time.h>, which is actually fine for the tzcode code, but breaks the
OpenBSD wcsftime().
(i hope one day to find the time to write a
wcsftime()-in-terms-of-strftime() wrapper so i can just delete that, but
working on wide character functions no-one uses or should be using is quite
hard to motivate. oh, wait... FreeBSD and NetBSD both already went that
route. i'll try that, in which case only tzcode itself will need to know
that the "real" name of the public `struct __timezone_t` is actually
`struct state`...)
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