Re: [RFC] Another idea for 6015

[Paolo Carlini <pcarlini at unitus dot it>]

Hi again...
(unpolitely replying to myself ;-)

> After the call to snprintf, on MT systems indeed (all of this may be 
> conditionalized to only (MT && !glibc2.3)), we have a c-string __out, 
> which possibly may be formatted according to a locale /different/ from 
> "C". Ok. What about "cleaning" it? Of course I have to study in detail 
> the C-locale documentation, but it should be not that difficult: a scan 
> right to left adjusting the decimal separator and removing any thousands 
> separators (anything different from a number counts) should be 90% of 
> the work...

Thinkink more about this... Is'nt really even easier?
 From the C99 Standard, 7.11.1.1,1:

    "LC_NUMERIC affects the decimal point character for the formatted 
input-output functions..."

So!
No matter what another thread can do in-between

  template<typename _Tv>
    int
    __convert_from_v(char* __out, const int __size, const char* __fmt,
		     _Tv __v, const __c_locale&, int __prec = -1)
    {
      int __ret;
      const char* __old = setlocale(LC_ALL, "C");
       if (__prec >= 0)

and

         __ret = snprintf(__out, __size, __fmt, __prec, __v);
      else
        __ret = snprintf(__out, __size, __fmt, __v);
      setlocale(LC_ALL, __old);
      return __ret;
    }

is'nt just a matter of adjusting to "." the decimal separator?

Ciao, Paolo.