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Date: Wed, 30 Sep 2020 22:35:29 -0400
From: Rich Felker <>
To: ell1e <>
Subject: Re: Would it to be possible to get strtoll_l?

On Thu, Oct 01, 2020 at 02:34:47AM +0200, ell1e wrote:
> Hi everyone,
> I'm working on a project and since the global state setlocale() seems to
> be a bit of a mess to rely on, I'm using the *_l() string functions
> instead. However, musl libc appears to lack strtoll_l() right now, so
> I'm wondering if that'll be added any time soon?

The portable way to do this is just calling uselocale() rather than
passing the locale_t to individual *_l functions. You can even
implement a fallback strtoll_l as:

localt_t old = uselocale(l);
result = strtoll(a,b,c);

It's slightly more efficient if you keep the uselocale across multiple
calls, but not that big a deal; uselocale is an extremely light

But is there a reason you don't just want plain strtoll? C allows that
"additional locale-specific subject sequence forms may be accepted" in
locales other than the C locale, but does not permit standard
sequences to be interpreted differently, and in practice I'm not aware
of implementations that do anything funny here.


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