Class: Zip::Deflater

Inherits:

Compressor

• Object
• Compressor
• Zip::Deflater

show all

Defined in:

lib/zip/zip.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) crc readonly

  Returns the value of attribute crc.

• - (Object) size readonly

  Returns the value of attribute size.

Instance Method Summary (collapse)

• - (Object) <<(data)
• - (Object) finish
• - (Deflater) initialize(outputStream, level = Zlib::DEFAULT_COMPRESSION) constructor

  A new instance of Deflater.

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# File 'lib/zip/zip.rb', line 1096

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

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# File 'lib/zip/zip.rb', line 1117

def crc
  @crc
end

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# File 'lib/zip/zip.rb', line 1117

def size
  @size
end

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# File 'lib/zip/zip.rb', line 1104

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

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# File 'lib/zip/zip.rb', line 1111

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