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Integrate utf8 hPutStr to standard hPutStr #589

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merged 5 commits into from
Jun 22, 2024
Merged

Integrate utf8 hPutStr to standard hPutStr #589

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603dffc
integrate utf8 hPutStr to standard hPutStr
BebeSparkelSparkel May 30, 2024
b56f072
comparing encoding pointers instead of strings of encoding names
BebeSparkelSparkel Jun 1, 2024
8f23c86
Adapt to move to Data.Text.Internal.IO
Lysxia Jun 3, 2024
e1068f1
Simplify import of utf8 and add a comment about pointer comparison in…
Lysxia Jun 3, 2024
fd62de7
Add a comment about non-atomic B.hPutStrLn
Bodigrim Jun 22, 2024
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13 changes: 11 additions & 2 deletions src/Data/Text/IO.hs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
{-# LANGUAGE BangPatterns, CPP, RecordWildCards, ScopedTypeVariables #-}
{-# LANGUAGE Trustworthy #-}
{-# LANGUAGE MagicHash #-}
-- |
-- Module : Data.Text.IO
-- Copyright : (c) 2009, 2010 Bryan O'Sullivan,
Expand Down Expand Up @@ -49,14 +50,18 @@ import System.IO (Handle, IOMode(..), hPutChar, openFile, stdin, stdout,
withFile)
import qualified Control.Exception as E
import Control.Monad (liftM2, when)
import qualified Data.ByteString as B
import Data.IORef (readIORef, writeIORef)
import qualified Data.Text as T
import Data.Text.Encoding (encodeUtf8)
import Data.Text.Internal.Fusion (stream)
import Data.Text.Internal.Fusion.Types (Step(..), Stream(..))
import Data.Text.Internal.IO (hGetLineWith, readChunk)
import GHC.Exts (reallyUnsafePtrEquality#, isTrue#)
import GHC.IO.Buffer (Buffer(..), BufferState(..), RawCharBuffer, CharBuffer,
emptyBuffer, isEmptyBuffer, newCharBuffer)
import qualified GHC.IO.Buffer
import GHC.IO.Encoding (utf8)
import GHC.IO.Exception (IOException(ioe_type), IOErrorType(InappropriateType))
import GHC.IO.Handle.Internals (augmentIOError, hClose_help, wantReadableHandle,
wantWritableHandle)
Expand Down Expand Up @@ -176,16 +181,20 @@ hGetLine = hGetLineWith T.concat
hPutStr :: Handle -> Text -> IO ()
-- This function is lifted almost verbatim from GHC.IO.Handle.Text.
hPutStr h t = do
(buffer_mode, nl) <-
(buffer_mode, nl, isUTF8) <-
wantWritableHandle "hPutStr" h $ \h_ -> do
bmode <- getSpareBuffer h_
return (bmode, haOutputNL h_)
return (bmode, haOutputNL h_, eqUTF8 h_)
let str = stream t
case buffer_mode of
_ | nl == LF && isUTF8 -> B.hPutStr h $ encodeUtf8 t
(NoBuffering, _) -> hPutChars h str
(LineBuffering, buf) -> writeLines h nl buf str
(BlockBuffering _, buf) -> writeBlocks (nl == CRLF) h buf str

where
eqUTF8 = maybe False (\enc -> isTrue# (reallyUnsafePtrEquality# utf8 enc)) . haCodec

hPutChars :: Handle -> Stream Char -> IO ()
hPutChars h (Stream next0 s0 _len) = loop s0
where
Expand Down
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