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|
{-# LANGUAGE OverloadedStrings #-}
{- |
Module : Text.Pandoc.UTF8
Copyright : Copyright (C) 2010-2021 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 Data.Text (Text)
import qualified Data.Text as T
import qualified Data.Text.IO as TIO
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)
readFile :: FilePath -> IO Text
readFile f = do
h <- openFile (encodePath f) ReadMode
hGetContents h
getContents :: IO Text
getContents = hGetContents stdin
writeFileWith :: Newline -> FilePath -> Text -> IO ()
writeFileWith eol f s =
withFile (encodePath f) WriteMode $ \h -> hPutStrWith eol h s
writeFile :: FilePath -> Text -> IO ()
writeFile = writeFileWith nativeNewline
putStrWith :: Newline -> Text -> IO ()
putStrWith eol s = hPutStrWith eol stdout s
putStr :: Text -> IO ()
putStr = putStrWith nativeNewline
putStrLnWith :: Newline -> Text -> IO ()
putStrLnWith eol s = hPutStrLnWith eol stdout s
putStrLn :: Text -> IO ()
putStrLn = putStrLnWith nativeNewline
hPutStrWith :: Newline -> Handle -> Text -> IO ()
hPutStrWith eol h s =
hSetNewlineMode h (NewlineMode eol eol) >>
hSetEncoding h utf8 >> TIO.hPutStr h s
hPutStr :: Handle -> Text -> IO ()
hPutStr = hPutStrWith nativeNewline
hPutStrLnWith :: Newline -> Handle -> Text -> IO ()
hPutStrLnWith eol h s =
hSetNewlineMode h (NewlineMode eol eol) >>
hSetEncoding h utf8 >> TIO.hPutStrLn h s
hPutStrLn :: Handle -> Text -> IO ()
hPutStrLn = hPutStrLnWith nativeNewline
hGetContents :: Handle -> IO Text
hGetContents = fmap toText . B.hGetContents
-- | Convert UTF8-encoded ByteString to Text, also
-- removing '\\r' characters.
toText :: B.ByteString -> 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 :: 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
|
