34 lines
1.4 KiB
Plaintext
34 lines
1.4 KiB
Plaintext
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libtai is a library for storing and manipulating dates and times.
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libtai supports two time scales: (1) TAI64, covering a few hundred
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billion years with 1-second precision; (2) TAI64NA, covering the
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same period with 1-attosecond precision. Both scales are defined
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in terms of TAI, the current international real time standard.
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libtai provides an internal format for TAI64, struct tai, designed
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for fast time manipulations. The tai_pack() and tai_unpack() routines
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convert between struct tai and a portable 8-byte TAI64 storage
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format. libtai provides similar internal and external formats for
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TAI64NA.
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libtai provides struct caldate to store dates in year-month-day
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form. It can convert struct caldate, under the Gregorian calendar,
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to a modified Julian day number for easy date arithmetic.
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libtai provides struct caltime to store calendar dates and times
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along with UTC offsets. It can convert from struct tai to struct
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caltime in UTC, accounting for leap seconds, for accurate date and
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time display. It can also convert back from struct caltime to struct
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tai for user input. Its overall UTC-to-TAI conversion speed is 100x
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better than the usual UNIX mktime() implementation.
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The libtai source code is in the public domain.
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WWW: ${HOMEPAGE}
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Online library documentation (in addition to the manual pages):
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http://cr.yp.to/libtai/caldate.html
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http://cr.yp.to/libtai/caltime.html
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http://cr.yp.to/libtai/tai.html
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http://cr.yp.to/libtai/taia.html
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