Class: Zip::PassThruDecompressor

Inherits:

Decompressor

• Object
• Decompressor
• Zip::PassThruDecompressor

show all

Defined in:

lib/zip/zip.rb

Overview

Constant Summary

Constant Summary

Constants inherited from Decompressor

Decompressor::CHUNK_SIZE

Instance Method Summary (collapse)

• - (PassThruDecompressor) initialize(inputStream, charsToRead) constructor

  A new instance of PassThruDecompressor.

• - (Boolean) input_finished? (also: #eof, #eof?)
• - (Object) produce_input
• - (Object) sysread(numberOfBytes = nil, buf = nil)

  TODO: Specialize to handle different behaviour in ruby > 1.7.0 ?.

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# File 'lib/zip/zip.rb', line 234

def initialize(inputStream, charsToRead)
  super inputStream
  @charsToRead = charsToRead
  @readSoFar = 0
  @hasReturnedEmptyString = ! EMPTY_FILE_RETURNS_EMPTY_STRING_FIRST
end

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# File 'lib/zip/zip.rb', line 261

def input_finished?
  (@readSoFar >= @charsToRead)
end

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# File 'lib/zip/zip.rb', line 257

def produce_input
  sysread(Decompressor::CHUNK_SIZE)
end

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# File 'lib/zip/zip.rb', line 242

def sysread(numberOfBytes = nil, buf = nil)
  if input_finished?
	hasReturnedEmptyStringVal=@hasReturnedEmptyString
	@hasReturnedEmptyString=true
	return "" unless hasReturnedEmptyStringVal
	return nil
  end
  
  if (numberOfBytes == nil || @readSoFar+numberOfBytes > @charsToRead)
	numberOfBytes = @charsToRead-@readSoFar
  end
  @readSoFar += numberOfBytes
  @inputStream.read(numberOfBytes, buf)
end