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Re: Leap second bug?

From: Ludovic Courtès
Subject: Re: Leap second bug?
Date: Mon, 09 Jun 2008 00:00:44 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux)


Ondrej Zajicek <address@hidden> writes:

> (use-modules (srfi srfi-19))
> (define (str->date str) (string->date str "~d-~m-~Y"))
> (define (date->str str) (date->string str "~d-~m-~Y"))
> (date->str (time-utc->date (date->time-utc (str->date "01-01-2006"))))
> -> "31-12-2005"
> Is is a bug in leap second handling or is it a expected behavior?

Not sure.  Our leap second table is up-to-date.  Apparently,
`time-utc->date' honors leap seconds, while `date->time-utc' doesn't.
In the reference implementation at (upon which Guile's is
based), none of these two honors leap seconds AFAICS.

I'm no expert in that area but I would suggest emailing the SRFI-19
mailing list [0] for advice.  It seems that most implementations use the
reference implementation with few modifications, in which case most
implementations might be affected.  Did you try it with other Scheme



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