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[Caml-list] string_of_float -> float_of_string locale dependency bug

Evgeny Chukreev
- Yamagata Yoriyuki
- Xavier Leroy
  - Evgeny Chukreev
  - Yamagata Yoriyuki
    - Evgeny Chukreev
      - Xavier Leroy
        
        Shawn Wagner
    - Xavier Leroy
      - Yamagata Yoriyuki

Date:	-- (:)
From:	Xavier Leroy <xavier.leroy@i...>
Subject:	Re: [Caml-list] string_of_float -> float_of_string locale dependency bug

> Camomile needs to set LC_ALL to acquire LC_NUMERIC value.  Camomile
> does not use LC_NUMERIC value currently, but it provides API to
> getting all LC_* values for the user.

Fine.  So what about restoring LC_NUMERIC after getting its value, like you
helpfully suggest that the Caml run-time system does?

> > The C library API for internationalization is largely broken, and as
> > you can see there is nothing we can do to work around the fact that
> > the current locale is a global variable for the whole program.
> 
> You can temporally save the current LC_NUMERIC value, change its value
> to C, and restore the value after the conversion.  What is a problem?

Speed.  setlocale() is quite expensive, and string <-> float
conversions can be extremely frequent.

- Xavier Leroy

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