# Zlib

Compression and decompression with zlib.

(import :std/text/zlib)

# compress

(compress data [level = 6]) -> u8vector | string | port | error

  data  := u8vector, string or input-port
  level := optional integer value, from 0 to 9

Compresses given data using zlib. The return value varies by given data's type. If given u8vector the return value is newly allocated u8vector with contents of data compressed. Signals a error on wrong type of data.

The optional level parameter sets the compression level used. Value of 1 gives best speed, 9 gives best compression, 0 gives no compression at all (the input data is simply copied a block at a time).

# compress-gz

(compress-gz data [level = 6]) -> u8vector | string | input-port | error

  data  := u8vector, string, or input-port
  level := optional integer value, from 0 to 9

Compresses data given in data as compress procedure but in addition gzip encodes it. Signals a error on wrong type of data.

# uncompress

(uncompress data) -> u8vector | error

  data := u8vector or input-port

Returns uncompressed bytes from data. Signals a error on wrong type of data.