66 lines
2.0 KiB
Plaintext
66 lines
2.0 KiB
Plaintext
Like any other piece of software (and information generally), libtai
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comes with NO WARRANTY.
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These are UNIX installation instructions; libtai has not yet been ported
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to non-UNIX systems.
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To compile the programs and format the man pages:
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% make
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Then, as root, enable leap second support:
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# cp leapsecs.dat /etc/leapsecs.dat
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# chmod 644 /etc/leapsecs.dat
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To use another compiler, edit conf-cc and conf-ld.
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There are five test programs here. The first is leapsecs, which creates
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leapsecs.dat from leapsecs.txt. Try
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% ./leapsecs < leapsecs.txt | cmp - leapsecs.dat
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to make sure that there are no differences.
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The second is check, which prints a variety of information about an
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ISO-style input date. Try
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% ./check < check.in | cmp - check.out
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to make sure that your test results match mine. Note that the results
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for future dates will change when more leap seconds are announced.
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The third is easter, which prints the date of Easter in any given year.
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Try
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% ./easter 1997 1998 1999 2000 2001
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and check the results against tables from some other source.
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The fourth is yearcal, which prints a year-long calendar. Try
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% ./yearcal 1997 | ul
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and check the results against another calendar. (The days in January,
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March, May, July, September, and November should show up in boldface.)
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The fifth is nowutc, which prints the current time in UTC. Your system's
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clock must be the number of seconds since 1970-01-01 00:00:10 TAI. This
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is compatible with the interpretation of time_t in the Olson time
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library with leap seconds enabled. Try
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% env TZ=right/Etc/GMT date; ./nowutc
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if your system has the Olson library.
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The libtai code is in the public domain, so you can use it in your own
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programs. But keep in mind that this is a very early release. Some of
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the code hasn't been tested at all! caldate_mjd() and caldate_frommjd()
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are based on previous code of mine; they need outside review. It would
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be particularly helpful to systematically check my results against
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independent results from someone else's code.
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