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{-# LANGUAGE CPP #-}
{-# LANGUAGE MagicHash #-}
{-# LANGUAGE OverloadedStrings #-}
module TestUtil where
#if MIN_VERSION_template_haskell(2,16,0)
import Language.Haskell.TH.Syntax
import qualified Data.ByteString as BS
import qualified Data.ByteString.Internal as BS
import GHC.Prim (Addr#)
import GHC.ForeignPtr (newForeignPtr_)
import GHC.Ptr (Ptr(Ptr))
testBytes :: BS.ByteString
testBytes =
"test bytes " <>
(BS.take (len - 2) $ BS.drop 1 $ BS.replicate len 42)
where
len = 20 * 1024 * 1024
bsToBytes :: BS.ByteString -> Bytes
bsToBytes bs =
Bytes
{ bytesPtr = fp
, bytesOffset = fromIntegral offset
, bytesSize = fromIntegral size
}
where
(fp, offset, size) = BS.toForeignPtr bs
addrToBs :: Addr# -> Int -> IO BS.ByteString
addrToBs addr len = do
fp <- newForeignPtr_ (Ptr addr)
return $ BS.fromForeignPtr fp 0 len
#endif
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