eeee054f1e
Now it's possible to change the character encoding while de-/encoding. Also, it's possible to use any data structure as a source or target of the de-/encoding process. darcs-hash:20090221203100-a4fee-6da31f2e37c30a3f5cd5f10af71984209488bb0b
31 lines
1.0 KiB
Haskell
31 lines
1.0 KiB
Haskell
{-# LANGUAGE DeriveDataTypeable #-}
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module Data.Encoding.Exception where
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import Control.Exception.Extensible
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import Data.Word
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import Data.Typeable
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import Control.Monad.Identity
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-- | This exception type is thrown whenever something went wrong during the
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-- encoding-process.
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data EncodingException
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= HasNoRepresentation Char -- ^ Thrown if a specific character
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-- is not representable in an encoding.
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deriving (Eq,Show,Typeable)
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instance Exception EncodingException
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-- | This exception type is thrown whenever something went wrong during the
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-- decoding-process.
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data DecodingException
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= IllegalCharacter Word8 -- ^ The sequence contained an illegal
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-- byte that couldn't be decoded.
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| UnexpectedEnd -- ^ more bytes were needed to allow a
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-- successfull decoding.
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| OutOfRange -- ^ the decoded value was out of the unicode range
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| IllegalRepresentation [Word8] -- ^ The character sequence encodes a
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-- character, but is illegal.
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deriving (Eq,Show,Typeable)
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instance Exception DecodingException
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