Date: Thu, 9 Sep 2010 14:46:40 -0700 From: mdf@FreeBSD.org To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: FreeBSD Arch <freebsd-arch@freebsd.org> Subject: Re: Extending sbufs with a drain, take 2 Message-ID: <AANLkTi=wQ48mOScqmbuf6aXXeGx=K3y%2BawrAXMkYeYKF@mail.gmail.com> In-Reply-To: <1725.1284065928@critter.freebsd.dk> References: <AANLkTik7%2BKTOCYJiZ_n3SYTbwszNPNgh0SL49HhJDoii@mail.gmail.com> <1725.1284065928@critter.freebsd.dk>
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On Thu, Sep 9, 2010 at 1:58 PM, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote:
> In message <AANLkTik7+KTOCYJiZ_n3SYTbwszNPNgh0SL49HhJDoii@mail.gmail.com>, mdf@
> FreeBSD.org writes:
>
>>One question about the printf expanded args in xprintf.c:
>>
>>Does the extension framework allow for multiple character conversion
>>specifiers?
>
> I belive it indexes with a single char into an array right now, but
> that is just a matter of string parsing, {...} is not hard to do.
>
> Bear in mind that using extensions force you to disable the GCC
> format checks, a heavy cost to bear.
Conveniently, we already have code at Isilon that modifies the gcc
format checks to look for the %{} format. I saved an email with info
about Clang's format checks so I may be able to do something there
too.
> Also bear in mind that any work on this should keep an eye on, and if
> at all possible collaborate with GLIBC for maximum compatibility.
Yes, this is something I don't know anything about. I'll look into it.
Thanks,
matthew
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