Contents

module Zip
  class PassThruDecompressor < Decompressor  #:nodoc:all
    def initialize(inputStream, charsToRead)
      super inputStream
      @charsToRead = charsToRead
      @readSoFar = 0
      @hasReturnedEmptyString = ! EMPTY_FILE_RETURNS_EMPTY_STRING_FIRST
    end
    
    # TODO: Specialize to handle different behaviour in ruby > 1.7.0 ?
    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
    
    def produce_input
      sysread(Decompressor::CHUNK_SIZE)
    end
    
    def input_finished?
      (@readSoFar >= @charsToRead)
    end
    alias :eof :input_finished?
    alias :eof? :input_finished?
  end
end

# Copyright (C) 2002, 2003 Thomas Sondergaard
# rubyzip is free software; you can redistribute it and/or
# modify it under the terms of the ruby license.

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
mezza-rubyzip-0.9.4.1	lib/zip/pass_thru_decompressor.rb