From: Carsten Dominik <carsten.dominik@gmail.com>
To: Achim Gratz <Stromeko@nexgo.de>, nicholas dokos <nicholas.dokos@hp.com>
Cc: Emacs Org mode mailing list <emacs-orgmode@gnu.org>
Subject: Re: dates before 1970
Date: Tue, 15 Mar 2011 08:24:24 +0100 [thread overview]
Message-ID: <6D45BFD1-141E-462D-8D84-D38B640E78BB@gmail.com> (raw)
In-Reply-To: <874o75a7vh.fsf@Rainer.invalid>
On Mar 14, 2011, at 7:12 PM, Achim Gratz wrote:
> Nick Dokos <nicholas.dokos@hp.com> writes:
>> I was referring to the C code implementing current-time (which, btw, has been
>> changed in latest):
>>
>> ,----
>> | DEFUN ("current-time", Fcurrent_time, Scurrent_time, 0, 0, 0,
>> | doc: /* Return the current time, as the number of seconds since 1970-01-01 00:00:00.
>> | The time is returned as a list of three integers. The first has the
>> | most significant 16 bits of the seconds, while the second has the
>> | least significant 16 bits. The third integer gives the microsecond
>> | count.
>> |
>> | The microsecond count is zero on systems that do not provide
>> | resolution finer than a second. */)
>> | (void)
>> | {
>> | EMACS_TIME t;
>> |
>> | EMACS_GET_TIME (t);
>> | return list3 (make_number ((EMACS_SECS (t) >> 16) & 0xffff),
>> | make_number ((EMACS_SECS (t) >> 0) & 0xffff),
>> | make_number (EMACS_USECS (t)));
>> | }
>> `----
>
> I can't see how this code works correctly unless it is guaranteed that
> EMACS_TIME is 32bit unsigned...
Yes, I agree. However, I am just realizing that using 32 bit unsigned
for (current-time) is fine for a loong time to come. So the issue
if *Org* can handle dates outside the safe range is is not about
`current-time' at all, but about what encode-time, decode-time,
time-subtract, time-add etc do, what kind of integers they can handle.
- Carsten
>
>
> Achim.
> --
> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
>
> Waldorf MIDI Implementation & additional documentation:
> http://Synth.Stromeko.net/Downloads.html#WaldorfDocs
>
>
- Carsten
next prev parent reply other threads:[~2011-03-15 7:24 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-10 21:00 dates before 1970 Eric S Fraga
2011-03-10 23:06 ` Nick Dokos
2011-03-11 8:31 ` Bastien
2011-03-11 8:52 ` Carsten Dominik
2011-03-13 7:39 ` Carsten Dominik
2011-03-13 20:08 ` Eric S Fraga
2011-03-14 7:40 ` Carsten Dominik
2011-03-14 9:58 ` Bastien
2011-03-11 8:47 ` Eric S Fraga
2011-03-11 11:36 ` Carsten Dominik
2011-03-11 12:00 ` Eric S Fraga
2011-03-11 15:28 ` Carsten Dominik
2011-03-11 17:56 ` Gregor Zattler
2011-03-12 22:38 ` Robert Horn
2011-03-11 16:30 ` Nick Dokos
2011-03-14 10:21 ` Carsten Dominik
2011-03-14 15:11 ` Nick Dokos
2011-03-14 17:02 ` Carsten Dominik
2011-03-14 17:13 ` Nick Dokos
2011-03-14 18:12 ` Achim Gratz
2011-03-15 7:24 ` Carsten Dominik [this message]
2011-03-11 16:16 ` Nick Dokos
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