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Received: by minnie.vk1xwt.ampr.org with NNTP id AA188 ; Fri, 29 Jan 93 07:00:29 EST Newsgroups: comp.unix.bsd Path: sserve!manuel.anu.edu.au!munnari.oz.au!spool.mu.edu!yale.edu!ira.uka.de!math.fu-berlin.de!news.netmbx.de!Germany.EU.net!mcsun!sunic!seunet!dynas!micke From: micke@dynas.se (Mikael Hybsch) Subject: Re: [386bsd] New patch00071 is slightly wrong Message-ID: <1993Jan28.160239.16048@dynas.se> Sender: news@dynas.se (News Administrator) Organization: DynaSoft, Dynamic Software AB References: <bIQKePhq40@astral.msk.su> Date: Thu, 28 Jan 1993 16:02:39 GMT Lines: 29 In <bIQKePhq40@astral.msk.su> "Andrew A. Chernov, Black Mage" <ache@astral.msk.su> writes: >I just look into new patch00071 of clock.c and found small bug, >it don't calculate leap year properly, produce error in 2000 year. The rule "year % 4" will work until year 2100, because (2000 % 400) is 0. Of course we still want our grand children to be able o use the correct time when they play with 386bsd. >! if (sec < 1970) >! sec += 100; >! leap = !(sec % 4); sec = ytos(sec); /* year */ >Correct way to calculate leap year is: >#define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0) >see for example /usr/include/tzfile.h >-- >In-This-Life: Andrew A. Chernov | "Hay mas dicha, mas contento >Internet: ache@astral.msk.su | "Que adorar una hermosura >FIDOnet: 2:5020/23.34 | "Brujuleada entre los lejos >Organization: The RELCOM Corp. | "De lo imposible?!" (Calderon) -- Mikael Hybsch Email: micke@dynas.se DynaSoft, Dynamic Software AB Phone: +46-8-615 84 00 Hammarby Fabriksv 13, Box 92058 Fax: +46-8-641 92 00 S-120 06 STOCKHOLM, SWEDEN