Make a new compress node.

The returned BIO node can be reused only if you call compressReset on the ZStream.

Reset compressor's state so that related BIO can be reused.

Compress some bytes.

Compress some bytes in blocks.

A foreign pointer to a zlib's z_stream_s struct.

Make a new decompress node.

The returned BIO node can be reused only if you call decompressReset on the ZStream.

Reset decompressor's state so that related BIO can be reused.

Decompress some bytes.

Decompress some bytes in blocks.

The WindowBits is the base two logarithm of the maximum window size (the size of the history buffer). It should be in the range 8..15 for this version of the library. The defaultWindowBits value is 15. Decompressing windowBits must be greater than or equal to the compressing windowBits. If a compressed stream with a larger window size is given as input, decompress will throw ZDataError windowBits can also be –8..–15 for raw inflate. In this case, -windowBits determines the window size. inflate() will then process raw deflate data, not looking for a zlib or gzip header, not generating a check value, and not looking for any check values for comparison at the end of the stream. windowBits can also be greater than 15 for optional gzip decoding. Add 32 to windowBits to enable zlib and gzip decoding with automatic header detection, or add 16 to decode only the gzip format.

The MemLevel specifies how much memory should be allocated for the internal compression state. 1 uses minimum memory but is slow and reduces compression ratio; 9 uses maximum memory for optimal speed. The default value is 8.