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The Zlib module contains several classes for compressing and decompressing streams, and for working with "gzip" files.

Classes

Following are the classes that are most likely to be of interest to the user: Zlib::Inflate Zlib::Deflate Zlib::GzipReader Zlib::GzipWriter

There are two important base classes for the classes above: Zlib::ZStream and Zlib::GzipFile. Everything else is an error class.

Constants

Here’s a list.

  Zlib::VERSION
      The Ruby/zlib version string.

  Zlib::ZLIB_VERSION
      The string which represents the version of zlib.h.

  Zlib::BINARY
  Zlib::ASCII
  Zlib::UNKNOWN
      The integers representing data types which Zlib::ZStream#data_type
      method returns.

  Zlib::NO_COMPRESSION
  Zlib::BEST_SPEED
  Zlib::BEST_COMPRESSION
  Zlib::DEFAULT_COMPRESSION
      The integers representing compression levels which are an argument
      for Zlib::Deflate.new, Zlib::Deflate#deflate, and so on.

  Zlib::FILTERED
  Zlib::HUFFMAN_ONLY
  Zlib::DEFAULT_STRATEGY
      The integers representing compression methods which are an argument
      for Zlib::Deflate.new and Zlib::Deflate#params.

  Zlib::DEF_MEM_LEVEL
  Zlib::MAX_MEM_LEVEL
      The integers representing memory levels which are an argument for
      Zlib::Deflate.new, Zlib::Deflate#params, and so on.

  Zlib::MAX_WBITS
      The default value of windowBits which is an argument for
      Zlib::Deflate.new and Zlib::Inflate.new.

  Zlib::NO_FLUSH
  Zlib::SYNC_FLUSH
  Zlib::FULL_FLUSH
  Zlib::FINISH
      The integers to control the output of the deflate stream, which are
      an argument for Zlib::Deflate#deflate and so on.

  Zlib::OS_CODE
  Zlib::OS_MSDOS
  Zlib::OS_AMIGA
  Zlib::OS_VMS
  Zlib::OS_UNIX
  Zlib::OS_VMCMS
  Zlib::OS_ATARI
  Zlib::OS_OS2
  Zlib::OS_MACOS
  Zlib::OS_ZSYSTEM
  Zlib::OS_CPM
  Zlib::OS_TOPS20
  Zlib::OS_WIN32
  Zlib::OS_QDOS
  Zlib::OS_RISCOS
  Zlib::OS_UNKNOWN
      The return values of Zlib::GzipFile#os_code method.
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