Tests for Data.Time.RFC1123

[time-http.git] / Data / Time / HTTP / Common.hs

diff --git a/Data/Time/HTTP/Common.hs b/Data/Time/HTTP/Common.hs
index 1cfa89e9c63528268d721d309927dc58f981f586..f7c74c91e1326b5944ea06d5082c0415ac2f0044 100644 (file)
--- a/Data/Time/HTTP/Common.hs
+++ b/Data/Time/HTTP/Common.hs
@@ -40,6 +40,7 @@ import Control.Monad
 import Data.Ascii (AsciiBuilder)
 import qualified Data.Ascii as A
 import Data.Attoparsec.Char8 as P
+import Data.Char
 import Data.Monoid.Unicode
 import Data.Fixed
 import Data.Time
@@ -242,20 +243,11 @@ read2' = do n1 ← (char ' ' *> pure 0) <|> digit'
             return (n1 * 10 + n2)
 
 digit' ∷ Num n ⇒ Parser n
-digit' = fromC <$> P.digit
-
-fromC ∷ Num n ⇒ Char → n
-fromC '0' = 0
-fromC '1' = 1
-fromC '2' = 2
-fromC '3' = 3
-fromC '4' = 4
-fromC '5' = 5
-fromC '6' = 6
-fromC '7' = 7
-fromC '8' = 8
-fromC '9' = 9
-fromC _   = undefined
+{-# INLINE digit' #-}
+digit' = fromIntegral <$> fromC <$> P.digit
+    where
+      {-# INLINE fromC #-}
+      fromC c = ord c - ord '0'
 
 show4digitsTZ ∷ TimeZone → AsciiBuilder
 show4digitsTZ tz