# File lib/bio/io/flatfile/index.rb, line 495
495:       def initialize(filename, filesize = nil)
496:         @filename = filename
497:         @filesize = filesize
498:         @io = nil
499:       end

     # File lib/bio/io/flatfile/index.rb, line 489
489:       def self.new_from_string(str)
490:         a = str.split("\t", 2)
491:         a[1] = a[1].to_i if a[1]
492:         self.new(a[0], a[1])
493:       end

     # File lib/bio/io/flatfile/index.rb, line 502
502:       def check
503:         begin
504:           fsize = File.size(@filename)
505:           r = ( fsize == @filesize)
506:         rescue Errno::ENOENT
507:           fsize = -1
508:           r = nil
509:         end
510:         DEBUG.print "FileID: File.size(#{@filename.inspect}) = ",
511:           fsize, (r ? ' == ' : ' != ') , @filesize,
512:           (r ? '' : ' bad!'), "\n"
513:         r
514:       end

     # File lib/bio/io/flatfile/index.rb, line 540
540:       def close
541:         if @io then
542:           DEBUG.print "FileID: close #{@filename}\n"
543:           @io.close
544:           @io = nil
545:           nil
546:         else
547:           true
548:         end
549:       end

     # File lib/bio/io/flatfile/index.rb, line 559
559:       def get(pos, length)
560:         open
561:         seek(pos, IO::SEEK_SET)
562:         data = read(length)
563:         close
564:         data
565:       end

     # File lib/bio/io/flatfile/index.rb, line 530
530:       def open
531:         unless @io then
532:           DEBUG.print "FileID: open #{@filename}\n"
533:           @io = File.open(@filename, 'rb')
534:           true
535:         else
536:           nil
537:         end
538:       end

     # File lib/bio/io/flatfile/index.rb, line 555
555:       def read(size)
556:         @io.read(size)
557:       end

     # File lib/bio/io/flatfile/index.rb, line 516
516:       def recalc
517:         @filesize = File.size(@filename)
518:       end

     # File lib/bio/io/flatfile/index.rb, line 551
551:       def seek(*arg)
552:         @io.seek(*arg)
553:       end

     # File lib/bio/io/flatfile/index.rb, line 520
520:       def to_s(i = nil)
521:         if i then
522:           str = "fileid_#{i}\t"
523:         else
524:           str = ''
525:         end
526:         str << "#{@filename}\t#{@filesize}"
527:         str
528:       end