I would go with opt 2, since msvcr100 is already very widely available.
On Tue, Jun 25, 2013 at 10:03 PM, Ruben Van Boxem
<[email protected]>wrote:
> Hi,
>
> You've maybe noticed I took up libc++ hacking again.
>
> Last time I started adding Windows support, and in order to provide the
> locale related things, I used _free_locale and _new_locale, which are in
> msvcr80 and up.
>
> Now I have a question and two alternatives:
> Q: How hard would it be to implement this in a MinGW-w64 library like
> mingw32 or mingwex?
> Alt: How hard would it be to provide an efficient uselocale function?
> Alt2: How hard would it be to provide *_l functions, which are normal
> functions like isdigit etc. that take an additional parameter of type
> locale_t instead of using the thread's locale. These are defined in xlocale
> on BSD and Mac OS X systems, and Microsoft has them in the newer CRTs.
>
> My current solution is located here:
>
> https://github.com/llvm-mirror/libcxx/blob/master/include/support/win32/locale_win32.h#L37
> and here:
>
> https://github.com/llvm-mirror/libcxx/blob/master/src/support/win32/locale_win32.cpp#L16
>
> which
> 1. is quite inefficient as it tries to do the right thing, but relies on
> _configthreadlocale to do so.
> 2. relies on msvcr100+
>
> The correct path would be to implement the *_l functions, which are quite
> useful, but that is above my skill set.
>
> Any help is much appreciated. This will allow MinGW-w64 to work
> independent of GCC's C++ Standard library and allow Clang access to a
> feature-complete C++11 Standard Library.
>
> Thanks,
>
> Ruben
>
>
>
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