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* How to do date arithmetic
@ 2003-04-19 17:52 Siegfried Heintze
  2003-04-19 20:17 ` Kai Großjohann
  0 siblings, 1 reply; 2+ messages in thread
From: Siegfried Heintze @ 2003-04-19 17:52 UTC (permalink / raw)


Some time ago I posted a query on how to perform date-time arithmetic and
received a response that I should look at time-date.el.

I'm running emacs 21.1 and I cannot find time-date.el. Where is it?

I also received a response to use these attached functions. However, the
following fragment doesnot seem to work right:
(current-time)
(16033 34617 85000)
(my-emacs-time->seconds (current-time))
-22968561
(my-seconds->emacs-time (my-emacs-time->seconds (current-time)))
(3745 34606 0)

        Thanks,
                      Siegfried
----------------------------------------------------------------------------
---------------
(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))

^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: How to do date arithmetic
  2003-04-19 17:52 How to do date arithmetic Siegfried Heintze
@ 2003-04-19 20:17 ` Kai Großjohann
  0 siblings, 0 replies; 2+ messages in thread
From: Kai Großjohann @ 2003-04-19 20:17 UTC (permalink / raw)


"Siegfried Heintze" <siegfried@heintze.com> writes:

> Some time ago I posted a query on how to perform date-time arithmetic and
> received a response that I should look at time-date.el.
>
> I'm running emacs 21.1 and I cannot find time-date.el. Where is it?

M-x locate-library RET time-date RET tells you.
-- 
file-error; Data: (Opening input file no such file or directory ~/.signature)

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2003-04-19 17:52 How to do date arithmetic Siegfried Heintze
2003-04-19 20:17 ` Kai Großjohann

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