mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-21 10:41:59 +03:00
68 lines
2.0 KiB
Idris
68 lines
2.0 KiB
Idris
import Data.Buffer
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import System.File
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import Debug.Buffer
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main : IO ()
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main
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= do Just buf <- newBuffer 100
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| Nothing => putStrLn "Buffer creation failed"
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s <- rawSize buf
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printLn s
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setInt32 buf 1 94
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setString buf 5 "AAAA"
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val <- getInt32 buf 1
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printLn val
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setDouble buf 10 94.42
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val <- getDouble buf 10
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printLn val
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let stringWithNULs = "string\NUL\NUL\NUL\NULcontaining 4 NULs"
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-- since the string contains only ASCII characters, `stringByteLength`
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-- should equal `length`
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putStrLn $ "bytes: " ++ show (stringByteLength stringWithNULs)
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putStrLn $ "characters: " ++ show (length stringWithNULs)
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setString buf 20 "Hello there!"
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val <- getString buf 20 5
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printLn val
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val <- getString buf 26 6
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printLn val
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setBits16 buf 32 65535
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val <- getBits16 buf 32
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printLn val
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ds <- bufferData buf
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printLn ds
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Right _ <- writeBufferToFile "test.buf" buf 100
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| Left err => putStrLn "Buffer write fail"
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Right buf2 <- createBufferFromFile "test.buf"
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| Left err => putStrLn "Buffer read fail"
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ds <- bufferData buf2
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printLn ds
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setByte buf2 0 1
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Just ccBuf <- concatBuffers [buf, buf2]
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| Nothing => putStrLn "Buffer concat failed"
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printLn !(bufferData ccBuf)
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Just (a, b) <- splitBuffer buf 20
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| Nothing => putStrLn "Buffer split failed"
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printBuffer a
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printBuffer b
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-- Put back when the File API is moved to C and these can work again
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-- Right f <- openBinaryFile "test.buf" Read
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-- | Left err => putStrLn "File error on read"
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-- Just buf3 <- newBuffer 99
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-- | Nothing => putStrLn "Buffer creation failed"
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-- Right _ <- readBufferFromFile f buf3 100
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-- | Left err => do putStrLn "Buffer read fail"
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-- closeFile f
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-- closeFile f
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