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From: jgy@hropus.UUCP
Newsgroups: comp.bugs.misc,comp.unix.wizards
Subject: Re: diffs for ctime.c for new DST rules, v7 systems
Message-ID: <883@hropus.UUCP>
Date: Mon, 9-Feb-87 17:26:20 EST
Article-I.D.: hropus.883
Posted: Mon Feb  9 17:26:20 1987
Date-Received: Wed, 11-Feb-87 05:27:17 EST
References: <1565@lsuc.UUCP>
Organization: Bell Labs, Holmdel, NJ
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Xref: watmath comp.bugs.misc:28 comp.unix.wizards:901

> Now, to the ctime.c diffs:
> 
> The changed file will have #define NorthAm but not USA, which is
> correct for Canada. If you are in the USA, add #define USA as well.
> (The 1974-75 change didn't apply in Canada.)
> 
> (I also put in a minor speedup posted to the net a while back;
> the test of year==74||year==75 is changed to year<=75&&year>=74,
> which it a bit faster for dates between 1975 and 1987.)
> 

If you really want a speed-up make the call to 'tzset' in localtime()
dependent on a static variable not being initialized, this provides
some time savings for things like long "ls"'s etc..