From: Christian Lemburg <lemburg@aixonix.de>
Subject: Re: How to: 96 bit Date-time arithmetic?
Date: 04 Sep 2002 09:57:02 +0200 [thread overview]
Message-ID: <m3fzwqw5kh.fsf@maki.aixonix.de> (raw)
In-Reply-To: un1oq9dhjbdva1@corp.supernews.com
"Siegfried Heintze" <siegfried@heintze.com> writes:
> How do I add delta times and subtract absolute times stored in the 96 bit (3
> integer) format? Apparently the functions encode and decode will help me
> convert to and from the 96 bit time format.
>
> I want to increment times by 1 day and have emacs properly figure out when
> there is a Feb 28.
(defun my-emacs-time->seconds (time)
"Convert emacs time format to seconds as one 32 bit integer."
(let ((high (lsh (car time) 16))
(low (cadr time)))
(logior high low)))
(defun my-seconds->emacs-time (time)
"Convert one 32 bit integer to emacs time format."
(list (lsh time -16) (logand time (1- (lsh 1 16))) 0))
--
Christian Lemburg, <lemburg@aixonix.de>, http://www.clemburg.com/
Hand, n.:
A singular instrument worn at the end of a human arm and
commonly thrust into somebody's pocket.
-- Ambrose Bierce, "The Devil's Dictionary"
next prev parent reply other threads:[~2002-09-04 7:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-31 15:39 How to: 96 bit Date-time arithmetic? Siegfried Heintze
2002-08-31 18:21 ` Siegfried Heintze
2002-08-31 20:49 ` lawrence mitchell
2002-09-04 7:57 ` Christian Lemburg [this message]
2002-09-04 13:58 ` Alan Shutko
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