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Read a file character by character/UTF8: Difference between revisions
Read a file character by character/UTF8 (view source)
Revision as of 22:28, 1 July 2020
, 3 years ago→{{header|Go}}: add Haskell
(Added Wren) |
(→{{header|Go}}: add Haskell) |
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Line 182:
}
}</lang>
=={{header|Haskell}}==
{{Works with|GHC|7.8.3}}
<lang haskell>#!/usr/bin/env runhaskell
{- The procedure to read a UTF-8 character is just:
hGetChar :: Handle -> IO Char
assuming that the encoding for the handle has been set to utf8.
-}
import Control.Monad
import Data.Char
import System.Environment
import System.IO
import Text.Printf
processCharacters :: Handle -> IO ()
processCharacters h = do
done <- hIsEOF h
unless done $ do
c <- hGetChar h
putStrLn $ printf "U+%04X" (ord c)
processCharacters h
processOneFile :: Handle -> IO ()
processOneFile h = do
hSetEncoding h utf8
processCharacters h
{- You can specify one or more files on the command line, or if no
files are specified, it reads from standard input.
-}
main :: IO ()
main = do
args <- getArgs
case args of
[] -> processOneFile stdin
xs -> forM_ xs $ \name -> do
putStrLn name
withFile name ReadMode processOneFile</lang>
{{out}}
<pre>
bash$ echo €50 | ./read-char-utf8.hs
U+20AC
U+0035
U+0030
U+000A
</pre>
=={{header|J}}==
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