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|
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{- |
Module : Text.Pandoc.UTF8
Copyright : Copyright (C) 2010-2020 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
UTF-8 aware string IO functions that will work with GHC 6.10, 6.12, or 7.
-}
module Text.Pandoc.UTF8 ( readFile
, getContents
, writeFileWith
, writeFile
, putStrWith
, putStr
, putStrLnWith
, putStrLn
, hPutStrWith
, hPutStr
, hPutStrLnWith
, hPutStrLn
, hGetContents
, toString
, toText
, fromString
, fromText
, toStringLazy
, fromTextLazy
, toTextLazy
, fromStringLazy
, encodePath
, decodeArg
)
where
import qualified Data.ByteString.Char8 as B
import qualified Data.ByteString.Lazy.Char8 as BL
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Data.Text.Lazy as TL
import qualified Data.Text.Lazy.Encoding as TL
import Prelude hiding (getContents, putStr, putStrLn, readFile, writeFile)
import System.IO hiding (getContents, hGetContents, hPutStr, hPutStrLn, putStr,
putStrLn, readFile, writeFile)
import qualified System.IO as IO
readFile :: FilePath -> IO String
readFile f = do
h <- openFile (encodePath f) ReadMode
hGetContents h
getContents :: IO String
getContents = hGetContents stdin
writeFileWith :: Newline -> FilePath -> String -> IO ()
writeFileWith eol f s =
withFile (encodePath f) WriteMode $ \h -> hPutStrWith eol h s
writeFile :: FilePath -> String -> IO ()
writeFile = writeFileWith nativeNewline
putStrWith :: Newline -> String -> IO ()
putStrWith eol s = hPutStrWith eol stdout s
putStr :: String -> IO ()
putStr = putStrWith nativeNewline
putStrLnWith :: Newline -> String -> IO ()
putStrLnWith eol s = hPutStrLnWith eol stdout s
putStrLn :: String -> IO ()
putStrLn = putStrLnWith nativeNewline
hPutStrWith :: Newline -> Handle -> String -> IO ()
hPutStrWith eol h s =
hSetNewlineMode h (NewlineMode eol eol) >>
hSetEncoding h utf8 >> IO.hPutStr h s
hPutStr :: Handle -> String -> IO ()
hPutStr = hPutStrWith nativeNewline
hPutStrLnWith :: Newline -> Handle -> String -> IO ()
hPutStrLnWith eol h s =
hSetNewlineMode h (NewlineMode eol eol) >>
hSetEncoding h utf8 >> IO.hPutStrLn h s
hPutStrLn :: Handle -> String -> IO ()
hPutStrLn = hPutStrLnWith nativeNewline
hGetContents :: Handle -> IO String
hGetContents = fmap toString . B.hGetContents
-- hGetContents h = hSetEncoding h utf8_bom
-- >> hSetNewlineMode h universalNewlineMode
-- >> IO.hGetContents h
-- | Convert UTF8-encoded ByteString to Text, also
-- removing '\r' characters.
toText :: B.ByteString -> T.Text
toText = T.decodeUtf8 . filterCRs . dropBOM
where dropBOM bs =
if "\xEF\xBB\xBF" `B.isPrefixOf` bs
then B.drop 3 bs
else bs
filterCRs = B.filter (/='\r')
-- | Convert UTF8-encoded ByteString to String, also
-- removing '\r' characters.
toString :: B.ByteString -> String
toString = T.unpack . toText
-- | Convert UTF8-encoded ByteString to Text, also
-- removing '\r' characters.
toTextLazy :: BL.ByteString -> TL.Text
toTextLazy = TL.decodeUtf8 . filterCRs . dropBOM
where dropBOM bs =
if "\xEF\xBB\xBF" `BL.isPrefixOf` bs
then BL.drop 3 bs
else bs
filterCRs = BL.filter (/='\r')
-- | Convert UTF8-encoded ByteString to String, also
-- removing '\r' characters.
toStringLazy :: BL.ByteString -> String
toStringLazy = TL.unpack . toTextLazy
fromText :: T.Text -> B.ByteString
fromText = T.encodeUtf8
fromTextLazy :: TL.Text -> BL.ByteString
fromTextLazy = TL.encodeUtf8
fromString :: String -> B.ByteString
fromString = fromText . T.pack
fromStringLazy :: String -> BL.ByteString
fromStringLazy = fromTextLazy . TL.pack
encodePath :: FilePath -> FilePath
encodePath = id
decodeArg :: String -> String
decodeArg = id
|
