From: Peter Stephenson <p.w.stephenson@ntlworld.com>
To: Zsh workers <zsh-workers@sunsite.dk>
Subject: Re: PATCH: support for nanosecond timestamps
Date: Sun, 4 Nov 2007 17:14:56 +0000 [thread overview]
Message-ID: <20071104171456.5d873459.p.w.stephenson@ntlworld.com> (raw)
In-Reply-To: <23800.1193938673@thecus>
On Thu, 01 Nov 2007 17:37:53 +0000
Oliver Kiddle <okiddle@yahoo.co.uk> wrote:
> Stephane Chazelas wrote:
> > What about returning floating point numbers for zstat?
>
> I've just looked at the documentation for stat to see how that might
> work. It'd end up returning the string representation rather than a float
> given the current interface. What exactly were you envisaging? It might
> be more useful to have it available with the -F (format) option. The only
> trouble there is that there is no standard for the letters to use in the
> format specifiers. date(1) on Linux has %N for nanoseconds.
%N seems reasonable, although I'm wondering if we might actually be
better off with a specification for floating point seconds; we could
then use the same thing in zsh/datetime where we only get microsecond
resolution from gettimeofday(). Either way, it would probably be good
to add this to ztrftime() and expand the interface to include a
(possibly NULL) pointer to whatever gives the extra resolution. Would
it be too horrible to allow formats like "%.9s"? We'd have to restrict
it to %S and %s which are the only two where it makes sense, and we
would have to decide what to do about E and O modifiers and glibc flag
additions; simply passing them straight through and not allowing a
fractional second in such cases would probably be good enough.
--
Peter Stephenson <p.w.stephenson@ntlworld.com>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/
next prev parent reply other threads:[~2007-11-04 17:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-01 15:40 Oliver Kiddle
2007-11-01 15:50 ` Stephane Chazelas
2007-11-01 17:37 ` Oliver Kiddle
2007-11-01 18:28 ` Stephane Chazelas
2007-11-04 17:14 ` Peter Stephenson [this message]
2007-11-05 14:45 ` Oliver Kiddle
2007-11-05 15:26 ` Stephane Chazelas
2007-11-05 15:31 ` Peter Stephenson
2007-11-04 16:46 ` Peter Stephenson
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