cb81698b7e
This way, we can declare DynEncoding an instance of Show darcs-hash:20070827020833-a4fee-a84635bf911573022b780c17b2085ff814302b3e
31 lines
784 B
Haskell
31 lines
784 B
Haskell
module Data.Encoding.CP1251
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(CP1251(..)) where
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import Data.Array ((!),Array)
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import Data.Word (Word8)
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import Data.ByteString (all)
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import Data.Map (Map,lookup,member)
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import Data.Encoding.Base
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import Prelude hiding (lookup,all)
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import Control.Exception (throwDyn)
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data CP1251 = CP1251 deriving Show
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instance Encoding CP1251 where
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encode _ = encodeSinglebyte (\c -> case lookup c encodeMap of
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Just v -> v
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Nothing -> throwDyn (HasNoRepresentation c))
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encodable _ c = member c encodeMap
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decode _ = decodeSinglebyte (decodeArr!)
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decodable _ = all (\w -> decodeArr!w /= '\xFFFD')
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decodeArr :: Array Word8 Char
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#ifndef __HADDOCK__
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decodeArr = $(decodingArray "CP1251.TXT")
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#endif
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encodeMap :: Map Char Word8
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#ifndef __HADDOCK__
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encodeMap = $(encodingMap "CP1251.TXT")
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#endif
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