Pipes.Zlib

This module exports utilities to compress and decompress pipes streams using the zlib compression codec.

If you want to compress or decompress GZip streams, use the Pipes.GZip module instead.

Streams

decompress

Arguments

:: MonadIO m

=> WindowBits

-> Producer' ByteString m r

Compressed stream

-> Producer' ByteString m r

Decompressed stream

Decompress bytes flowing from a Producer.

See the Codec.Compression.Zlib module for details about WindowBits.

compress

Arguments

:: MonadIO m

=> CompressionLevel

-> WindowBits

-> Producer' ByteString m r

Decompressed stream

-> Producer' ByteString m r

Compressed stream

Compress bytes flowing from a Producer.

See the Codec.Compression.Zlib module for details about CompressionLevel and WindowBits.

Compression level

The following are re-exported from Codec.Compression.Zlib for your convenience.

defaultCompression :: CompressionLevel

The default compression level is 6 (that is, biased towards higher compression at expense of speed).

noCompression :: CompressionLevel

No compression, just a block copy.

bestSpeed :: CompressionLevel

The fastest compression method (less compression)

bestCompression :: CompressionLevel

The slowest compression method (best compression).

compressionLevel :: Int -> CompressionLevel

A specific compression level between 0 and 9.

Window size

The following are re-exported from Codec.Compression.Zlib for your convenience.

defaultWindowBits :: WindowBits

The default WindowBits is 15 which is also the maximum size.

windowBits :: Int -> WindowBits

A specific compression window size, specified in bits in the range 8..15