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{-# LANGUAGE OverloadedStrings #-}
import Data.ByteString (ByteString)
import Data.Streaming.Text
import System.Environment (getArgs)
input :: [ByteString]
input = replicate 1000000 "Hello World!\n"
main :: IO ()
main = do
args <- getArgs
let dec =
case args of
["16le"] -> decodeUtf16LE
["16be"] -> decodeUtf16BE
["32le"] -> decodeUtf32LE
["32be"] -> decodeUtf32BE
["8pure"] -> decodeUtf8Pure
_ -> decodeUtf8
loop dec input
loop :: (ByteString -> DecodeResult) -> [ByteString] -> IO ()
loop dec [] =
case dec "" of
DecodeResultSuccess _ _ -> return ()
DecodeResultFailure _ _ -> error "failure1"
loop dec (bs:bss) =
case dec bs of
DecodeResultSuccess _ dec' -> loop dec' bss
DecodeResultFailure _ _ -> error "failure2"
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