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Diffstat (limited to 'testsuite/tests/lib/IOExts/hGetBuf002.hs')
-rw-r--r-- | testsuite/tests/lib/IOExts/hGetBuf002.hs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/testsuite/tests/lib/IOExts/hGetBuf002.hs b/testsuite/tests/lib/IOExts/hGetBuf002.hs new file mode 100644 index 0000000000..525eeb8e36 --- /dev/null +++ b/testsuite/tests/lib/IOExts/hGetBuf002.hs @@ -0,0 +1,22 @@ +import System.IO +import Foreign +import Foreign.C + +main = do test True; test False + +test blocking = do + h <- openBinaryFile "hGetBuf002.hs" ReadMode + + let sz = 42 + loop = do + b <- allocaBytes sz $ \ptr -> do + r <- (if blocking then hGetBuf else hGetBufNonBlocking) h ptr sz + if (r == 0) + then return True + else do s <- peekCStringLen (ptr,r) + putStr s + return False + if b then return () else loop -- tail call + + loop + |