Haskell Hierarchical Libraries (time package) Source code Contents Index

Data.Time.Clock.TAI

Description

TAI and leap-second tables for converting to UTC: most people won't need this module.

Synopsis

data AbsoluteTime taiEpoch :: AbsoluteTime addAbsoluteTime :: DiffTime -> AbsoluteTime -> AbsoluteTime diffAbsoluteTime :: AbsoluteTime -> AbsoluteTime -> DiffTime type LeapSecondTable = Day -> Integer utcDayLength :: LeapSecondTable -> Day -> DiffTime utcToTAITime :: LeapSecondTable -> UTCTime -> AbsoluteTime taiToUTCTime :: LeapSecondTable -> AbsoluteTime -> UTCTime parseTAIUTCDATFile :: String -> LeapSecondTable

Documentation

data AbsoluteTime

AbsoluteTime is TAI, time as measured by a clock. Instances Eq AbsoluteTime Ord AbsoluteTime Show AbsoluteTime

taiEpoch :: AbsoluteTime

The epoch of TAI, which is

addAbsoluteTime :: DiffTime -> AbsoluteTime -> AbsoluteTime

addAbsoluteTime a b = a + b

diffAbsoluteTime :: AbsoluteTime -> AbsoluteTime -> DiffTime

diffAbsoluteTime a b = a - b

type LeapSecondTable = Day -> Integer

TAI - UTC during this day. No table is provided, as any program compiled with it would become out of date in six months.

utcDayLength :: LeapSecondTable -> Day -> DiffTime

utcToTAITime :: LeapSecondTable -> UTCTime -> AbsoluteTime

taiToUTCTime :: LeapSecondTable -> AbsoluteTime -> UTCTime

parseTAIUTCDATFile :: String -> LeapSecondTable

Parse the contents of a tai-utc.dat file. This does not do any kind of validation and will return a bad table for input not in the correct format.

Produced by Haddock version 0.8