Pete Forman writes:> One workaround would be to add 4*n to tm_year and subtract (365*4+1)> *24*60*60*n from the time_t
returned. (All leap years are multiples> of 4 in the range 1901 to 2038. If tm_wday is wanted, that will need> to be
adjustedas well.)
FWIW, that should be to add 28*n to tm_year and subtract (365*4+1)*7
*24*60*60*n from the time_t returned. That calculates tm_wday
correctly.
Also I should have been more explicit that this applies only to AIX
and IRIX. Those return -1 from mktime(year < 1970) and do not allow
DST rules to vary from year to year. Linux and Solaris have more
capable date libraries.
--
Pete Forman http://www.bedford.waii.com/wsdev/petef/PeteF_links.html
WesternGeco http://www.crosswinds.net/~petef
Manton Lane, Bedford, mailto:pete.forman@westerngeco.com
MK41 7PA, UK tel:+44-1234-224798 fax:+44-1234-224804
