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Diffstat (limited to 'contrib/external-tests/haskell/src/Data/Time/TAI64.hs')
-rw-r--r-- | contrib/external-tests/haskell/src/Data/Time/TAI64.hs | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/contrib/external-tests/haskell/src/Data/Time/TAI64.hs b/contrib/external-tests/haskell/src/Data/Time/TAI64.hs new file mode 100644 index 0000000..37a90e6 --- /dev/null +++ b/contrib/external-tests/haskell/src/Data/Time/TAI64.hs @@ -0,0 +1,86 @@ +module Data.Time.TAI64 ( + TAI64(..) + , TAI64N(..) + , TAI64NA(..) + , posixToTAI64 + , posixToTAI64N + , posixToTAI64NA + , getCurrentTAI64 + , getCurrentTAI64N + , getCurrentTAI64NA + , tAI64ToPosix + , tAI64NToPosix + , tAI64NAToPosix +) where + +import Data.Serialize +import Control.Monad +import Data.Word + +import Data.Time.Clock +import Data.Time.Clock.POSIX + +import Numeric + +data TAI64 = TAI64 + {-# UNPACK #-} !Word64 + deriving (Eq, Ord) + +data TAI64N = TAI64N + {-# UNPACK #-} !TAI64 + {-# UNPACK #-} !Word32 + deriving (Eq, Ord, Show) + +data TAI64NA = TAI64NA + {-# UNPACK #-} !TAI64N + {-# UNPACK #-} !Word32 + deriving (Eq, Ord, Show) + +instance Show TAI64 where + show (TAI64 t) = "TAI64 0x" ++ showHex t "" + +instance Serialize TAI64 where + put (TAI64 t) = putWord64be t + get = liftM TAI64 get + +instance Serialize TAI64N where + put (TAI64N t' nt) = put t' >> putWord32be nt + get = liftM2 TAI64N get get + +instance Serialize TAI64NA where + put (TAI64NA t' at) = put t' >> putWord32be at + get = liftM2 TAI64NA get get + + +posixToTAI64 :: POSIXTime -> TAI64 +posixToTAI64 = TAI64 . (2^62 +) . truncate . realToFrac + +posixToTAI64N :: POSIXTime -> TAI64N +posixToTAI64N pt = TAI64N t' ns where + t' = posixToTAI64 pt + ns = (`mod` 10^9) $ truncate (pts * 10**9) + pts = realToFrac pt + +posixToTAI64NA :: POSIXTime -> TAI64NA -- | PICOsecond precision +posixToTAI64NA pt = TAI64NA t' as where + t' = posixToTAI64N pt + as = (`mod` 10^9) $ truncate (pts * 10**18) + pts = realToFrac pt + +getCurrentTAI64 :: IO TAI64 +getCurrentTAI64N :: IO TAI64N +getCurrentTAI64NA :: IO TAI64NA +getCurrentTAI64 = liftM posixToTAI64 getPOSIXTime +getCurrentTAI64N = liftM posixToTAI64N getPOSIXTime +getCurrentTAI64NA = liftM posixToTAI64NA getPOSIXTime + +tAI64ToPosix :: TAI64 -> POSIXTime +tAI64ToPosix (TAI64 s) = fromRational . fromIntegral $ s - 2^62 + +tAI64NToPosix :: TAI64N -> POSIXTime +tAI64NToPosix (TAI64N t' n) = tAI64ToPosix t' + nanopart where + nanopart = fromRational $ (toRational $ 10**(-9)) * toRational n -- TODO: optimize? + +tAI64NAToPosix :: TAI64NA -> POSIXTime +tAI64NAToPosix (TAI64NA t' a) = tAI64NToPosix t' + attopart where + attopart = fromRational $ (toRational $ 10**(-18)) * toRational a |