# File lib/zip/zipfilesystem.rb, line 424
      def initialize(mappedZip)
        @mappedZip = mappedZip
      end

# File lib/zip/zipfilesystem.rb, line 450
      def chdir(aDirectoryName)
        unless @file.stat(aDirectoryName).directory?
          raise Errno::EINVAL, "Invalid argument - #{aDirectoryName}"
        end
        @mappedZip.pwd = @file.expand_path(aDirectoryName)
      end

# File lib/zip/zipfilesystem.rb, line 490
      def chroot(*args)
        raise NotImplementedError, "The chroot() function is not implemented"
      end

# File lib/zip/zipfilesystem.rb, line 477
      def delete(entryName)
        unless @file.stat(entryName).directory?
          raise Errno::EINVAL, "Invalid argument - #{entryName}"
        end
        @mappedZip.remove(entryName)
      end

# File lib/zip/zipfilesystem.rb, line 457
      def entries(aDirectoryName)
        entries = []
        foreach(aDirectoryName) { |e| entries << e }
        entries
      end

# File lib/zip/zipfilesystem.rb, line 463
      def foreach(aDirectoryName)
        unless @file.stat(aDirectoryName).directory?
          raise Errno::ENOTDIR, aDirectoryName
        end
        path = @file.expand_path(aDirectoryName).ensure_end("/")

        subDirEntriesRegex = Regexp.new("^#{path}([^/]+)$")
        @mappedZip.each { 
          |fileName|
          match = subDirEntriesRegex.match(fileName)
          yield(match[1]) unless match == nil
        }
      end

# File lib/zip/zipfilesystem.rb, line 486
      def mkdir(entryName, permissionInt = 0755)
        @mappedZip.mkdir(entryName, permissionInt)
      end

# File lib/zip/zipfilesystem.rb, line 430
      def new(aDirectoryName)
        ZipFsDirIterator.new(entries(aDirectoryName))
      end

# File lib/zip/zipfilesystem.rb, line 434
      def open(aDirectoryName)
        dirIt = new(aDirectoryName)
        if block_given?
          begin
            yield(dirIt)
            return nil
          ensure
            dirIt.close
          end
        end
        dirIt
      end

# File lib/zip/zipfilesystem.rb, line 447
      def pwd; @mappedZip.pwd; end