19 lines
924 B
Text
19 lines
924 B
Text
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 same
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period with 1-attosecond precision. Both scales are defined in terms of
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TAI, the current international real time standard.
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libtai provides an internal format for TAI64, struct tai, designed for
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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 format.
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libtai provides similar internal and external formats for TAI64NA.
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libtai provides struct caldate to store dates in year-month-day form. It
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can convert struct caldate, under the Gregorian calendar, to a modified
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Julian day number for easy date arithmetic.
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This version of libtai requires a UNIX system with gettimeofday(). It
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will be easy to port to other operating systems with compilers
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supporting 64-bit arithmetic.
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WWW: http://cr.yp.to/libtai.html
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