rubyzip/lib/zip/pass_thru_decompressor.rb

module Zip
  class PassThruDecompressor < Decompressor #:nodoc:all
    def initialize(*args)
      super
      @read_so_far = 0
    end

    def read(length = nil, outbuf = '')
      return ((length.nil? || length.zero?) ? "" : nil) if eof

      if length.nil? || (@read_so_far + length) > decompressed_size
        length = decompressed_size - @read_so_far
      end

      @read_so_far += length
      input_stream.read(length, outbuf)
    end

    def eof
      @read_so_far >= decompressed_size
    end

    alias_method :eof?, :eof
  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.