System.IO.Streams.Zlib

Interface to zlib and gzip compression for Bytestrings and Builders

ByteString decompression

gunzip :: InputStream ByteString -> IO (InputStream ByteString)

Decompress an InputStream of strict ByteStrings from the gzip format

decompress :: InputStream ByteString -> IO (InputStream ByteString)

Decompress an InputStream of strict ByteStrings from the zlib format

ByteString compression

gzip :: CompressionLevel -> OutputStream ByteString -> IO (OutputStream ByteString)

Convert an OutputStream that consumes compressed ByteStrings into an OutputStream that consumes uncompressed ByteStrings in the gzip format

compress :: CompressionLevel -> OutputStream ByteString -> IO (OutputStream ByteString)

Convert an OutputStream that consumes compressed ByteStrings into an OutputStream that consumes uncompressed ByteStrings in the zlib format

Builder compression

gzipBuilder :: CompressionLevel -> OutputStream Builder -> IO (OutputStream Builder)

Convert an OutputStream that consumes compressed Builders into an OutputStream that consumes uncompressed Builders in the gzip format

compressBuilder :: CompressionLevel -> OutputStream Builder -> IO (OutputStream Builder)

Convert an OutputStream that consumes compressed Builders into an OutputStream that consumes uncompressed Builders in the zlib format

Compression level

newtype CompressionLevel

Parameter that defines the tradeoff between speed and compression ratio

Constructors

CompressionLevel Int

Instances

Eq CompressionLevel

Methods

(==) :: CompressionLevel -> CompressionLevel -> Bool

(/=) :: CompressionLevel -> CompressionLevel -> Bool

Num CompressionLevel

Methods

(+) :: CompressionLevel -> CompressionLevel -> CompressionLevel

(-) :: CompressionLevel -> CompressionLevel -> CompressionLevel

(*) :: CompressionLevel -> CompressionLevel -> CompressionLevel

negate :: CompressionLevel -> CompressionLevel

abs :: CompressionLevel -> CompressionLevel

signum :: CompressionLevel -> CompressionLevel

fromInteger :: Integer -> CompressionLevel

Read CompressionLevel

Methods

readsPrec :: Int -> ReadS CompressionLevel

readList :: ReadS [CompressionLevel]

readPrec :: ReadPrec CompressionLevel

readListPrec :: ReadPrec [CompressionLevel]

Show CompressionLevel

Methods

showsPrec :: Int -> CompressionLevel -> ShowS

show :: CompressionLevel -> String

showList :: [CompressionLevel] -> ShowS

defaultCompressionLevel :: CompressionLevel

A compression level that balances speed with compression ratio