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Re: Some details on the named locale problem
- From: Paolo Carlini <pcarlini at unitus dot it>
- To: Nathan Myers <ncm-nospam at cantrip dot org>
- Cc: libstdc++ at gcc dot gnu dot org
- Date: Tue, 29 Jan 2002 00:13:06 +0100
- Subject: Re: Some details on the named locale problem
- References: <3C554198.61F947F6@unitus.it> <20020128230339.A80012@cantrip.org>
Nathan Myers wrote:
> In the case where you get nonsense from the C library (or, more
> preferably, from its tables), you can substitute something reasonable.
Ok, thanks.
> For the case of a null thousands_sep, you can return the base
> class result (',').
Ah, ok. In a follow up patch to that I have posted moments ago (which fixes
seg-faults!) I will also adjust this, substituting NUL with ',' for the
thousands separator, after having inferred from NUL that grouping is "", as
indicated by Ulrich.
Ok?
> If you get 0xff as the first character in
> the grouping, that is equivalent to the empty string. "\003\003"
> is equivalent to a single "\003", but it's fairly harmless.
> (You might want to ignore all but the bottom 4 bits of each
> grouping character, in use, in case some idiot user passes "3"
> instead of "\003".)
I see. We can work on this soonish.
> For the long term it would be better to have our own code to read
> locale files, instead of relying on the C library. On POSIX systems
> where you don't know the locale file format (or placement) you are
> at least guaranteed to have a program that will extract them to a
> standard format, which you can then compile into your own preferred
> format. Thus, at "make install" you can generate optimal locale
> files for C++ use alone. On GNU systems we can just read the
> C library's locale files directly because we know their format.
Nathan, we have a PR (libstdc++/5499) about truename and falsename,
un-implementable right now, if I understand well. What do you think about that?
Cheers,
Paolo.
P.S. As you may have noticed I CC-ed some messages directly to you today but had
them rejected by your mail server :-(