--- |This module is for ANSI C's asctime() format.
+{-# LANGUAGE
+ UnicodeSyntax
+ #-}
+-- |This module provides functions for ANSI C's asctime() format.
--
-- ANSI C's asctime() format looks like:
--
-- As you can see, it has no time zone info. "Data.Time.HTTP" will
-- treat it as UTC.
module Data.Time.Asctime
- ( format
- , parse
+ ( -- * Formatting
+ toAscii
+ , toAsciiBuilder
+
+ -- * Parsing
+ , fromAscii
+ , asctime
)
where
-
-import qualified Text.Parsec as P
-
+import Data.Ascii (Ascii)
+import qualified Data.Ascii as A
+import qualified Data.Attoparsec.Char8 as P
import Data.Time
-import Data.Time.Calendar.WeekDate
-import Data.Time.HTTP.Common
-import Data.Time.Asctime.Parsec
+import Data.Time.Asctime.Internal
+import Prelude.Unicode
--- |Format a 'LocalTime' in the ANSI C's asctime() way.
-format :: LocalTime -> String
-format localTime
- = let (year, month, day) = toGregorian (localDay localTime)
- (_, _, week) = toWeekDate (localDay localTime)
- timeOfDay = localTimeOfDay localTime
- in
- concat [ shortWeekDayName week
- , ", "
- , shortMonthName month
- , " "
- , show2 day
- , " "
- , show2 (todHour timeOfDay)
- , ":"
- , show2 (todMin timeOfDay)
- , ":"
- , show2 (floor (todSec timeOfDay))
- , " "
- , show4 year
- ]
+-- |Convert a 'LocalTime' to ANSI C's @asctime()@ string.
+toAscii ∷ LocalTime → Ascii
+toAscii = A.fromAsciiBuilder ∘ toAsciiBuilder
--- |Parse an ANSI C's asctime() format to 'LocalTime'. When the string
--- can't be parsed, it returns 'Nothing'.
-parse :: String -> Maybe LocalTime
-parse src = case P.parse p "" src of
- Right zt -> Just zt
- Left _ -> Nothing
+-- |Parse an ANSI C's @asctime()@ string. When the string can't be
+-- parsed, it returns @'Left' err@.
+fromAscii ∷ Ascii → Either String LocalTime
+fromAscii = P.parseOnly p ∘ A.toByteString
where
- p = do zt <- asctime
- _ <- P.eof
+ p = do zt ← asctime
+ P.endOfInput
return zt