Class: Zip::Deflater

Inherits:
Compressor show all
Defined in:
lib/zip/deflater.rb

Overview

:nodoc:all

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(outputStream, level = Zlib::DEFAULT_COMPRESSION) ⇒ Deflater

Returns a new instance of Deflater.



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# File 'lib/zip/deflater.rb', line 3

def initialize(outputStream, level = Zlib::DEFAULT_COMPRESSION)
  super()
  @outputStream = outputStream
  @zlibDeflater = Zlib::Deflate.new(level, -Zlib::MAX_WBITS)
  @size = 0
  @crc = Zlib::crc32
end

Instance Attribute Details

#crc ⇒ Object (readonly)

Returns the value of attribute crc.



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# File 'lib/zip/deflater.rb', line 24

def crc
  @crc
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/zip/deflater.rb', line 24

def size
  @size
end

Instance Method Details

#<<(data) ⇒ Object 



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# File 'lib/zip/deflater.rb', line 11

def << (data)
  val = data.to_s
  @crc = Zlib::crc32(val, @crc)
  @size += val.bytesize
  @outputStream << @zlibDeflater.deflate(data)
end

#finish ⇒ Object 



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# File 'lib/zip/deflater.rb', line 18

def finish
  until @zlibDeflater.finished?
    @outputStream << @zlibDeflater.finish
  end
end