From: jnc@mercury.lcs.mit.edu (Noel Chiappa)
Subject: [TUHS] Date madness
Date: Wed, 13 Dec 2017 10:56:55 -0500 (EST) [thread overview]
Message-ID: <20171213155655.1869618C095@mercury.lcs.mit.edu> (raw)
> Guess the date code is probably missing the '400 year' exception.
So, I looked at the code, and the bug is not obvious. (The routine for
detecting leap years in V6's ctime.c is so minimalistic it actually works for
2000!)
The version I'm currently running had been worked on some, to have a hack fix
for the overflow of the number of 8-hour periods since the epoch ("hack" since
the 'fixed' version will break in 2029 or so), and I was worried that 'fix'
was wrong and caused the week-day problem, but I don't think so.
Noel
next reply other threads:[~2017-12-13 15:56 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-13 15:56 Noel Chiappa [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-12-16 10:50 Doug McIlroy
2017-12-16 16:11 ` Random832
2017-12-16 17:11 ` Ralph Corderoy
2017-12-13 22:16 Norman Wilson
2017-12-14 0:24 ` Chris Torek
2017-12-17 16:20 ` Ron Natalie
2017-12-17 18:53 ` Tom Ivar Helbekkmo
2017-12-17 20:07 ` Ron Natalie
2017-12-13 20:22 Noel Chiappa
2017-12-13 19:12 Doug McIlroy
2017-12-14 3:07 ` Random832
2017-12-15 3:04 ` Random832
2017-12-13 17:16 Noel Chiappa
2017-12-13 18:53 ` Tom Ivar Helbekkmo
2017-12-13 20:46 ` arnold
2017-12-15 16:41 ` Paul Winalski
2017-12-15 17:19 ` Dave Horsfall
2017-12-16 15:45 ` Clem Cole
2017-12-16 3:39 ` Dave Horsfall
2017-12-16 3:45 ` Lyndon Nerenberg
2017-12-17 1:43 ` Dave Horsfall
2017-12-14 3:08 ` Dave Horsfall
2017-12-14 3:13 ` Warner Losh
2017-12-13 16:31 Noel Chiappa
2017-12-13 16:50 ` arnold
2017-12-13 16:08 Noel Chiappa
2017-12-13 16:23 ` arnold
2017-12-12 18:31 Noel Chiappa
2017-12-12 18:01 Noel Chiappa
2017-12-12 18:21 ` Warner Losh
2017-12-13 15:07 ` Random832
2017-12-13 17:00 ` Jason Stevens
2017-12-13 17:18 ` Ron Natalie
2017-12-13 18:02 ` Arthur Krewat
2017-12-13 15:39 ` Wolfgang Helbig
2017-12-14 0:57 ` Dave Horsfall
2017-12-14 14:09 ` William Cheswick
2017-12-17 16:19 ` Ron Natalie
2017-12-17 16:33 ` William Cheswick
2017-12-17 17:54 ` Random832
2017-12-17 22:15 ` Dave Horsfall
2017-12-17 22:54 ` Ian Zimmerman
2017-12-16 18:12 ` Wolfgang Helbig
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