Class: Archive::Tar::Minitar::Reader::EntryStream

Inherits:
Object
  • Object
show all
Defined in:
lib/amp/dependencies/minitar.rb

Overview

EntryStreams are pseudo-streams on top of the main data stream.

Instance Method Summary collapse

Constructor Details

#initialize(header, anIO) ⇒ EntryStream

Returns a new instance of EntryStream.



464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
 
# File 'lib/amp/dependencies/minitar.rb', line 464

def initialize(header, anIO)
  @io       = anIO
  @name     = header.name
  @mode     = header.mode
  @uid      = header.uid
  @gid      = header.gid
  @size     = header.size
  @mtime    = header.mtime
  @checksum = header.checksum
  @typeflag = header.typeflag
  @linkname = header.linkname
  @magic    = header.magic
  @version  = header.version
  @uname    = header.uname
  @gname    = header.gname
  @devmajor = header.devmajor
  @devminor = header.devminor
  @prefix   = header.prefix
  @read     = 0
  @orig_pos = @io.pos
end

Instance Method Details

#bytes_read ⇒ Object 



536
537
538
 
# File 'lib/amp/dependencies/minitar.rb', line 536

def bytes_read
  @read
end

#close ⇒ Object

Closes the entry.



550
551
552
 
# File 'lib/amp/dependencies/minitar.rb', line 550

def close
  invalidate
end

#directory? ⇒ Boolean Also known as: directory

Returns true if the entry represents a directory.

Returns:



507
508
509
 
# File 'lib/amp/dependencies/minitar.rb', line 507

def directory?
  @typeflag == "5"
end

#eof? ⇒ Boolean

Returns true if the current read pointer is at the end of the EntryStream data.

Returns:



520
521
522
 
# File 'lib/amp/dependencies/minitar.rb', line 520

def eof?
  @read >= @size
end

#file? ⇒ Boolean Also known as: file

Returns true if the entry represents a plain file.

Returns:



513
514
515
 
# File 'lib/amp/dependencies/minitar.rb', line 513

def file?
  @typeflag == "0"
end

#full_name ⇒ Object

Returns the full and proper name of the entry.



541
542
543
544
545
546
547
 
# File 'lib/amp/dependencies/minitar.rb', line 541

def full_name
  if @prefix != ""
    File.join(@prefix, @name)
  else
    @name
  end
end

#getc ⇒ Object

Reads one byte from the entry. Returns nil if there is no more data to read.



499
500
501
502
503
504
 
# File 'lib/amp/dependencies/minitar.rb', line 499

def getc
  return nil if @read >= @size
  ret = @io.getc
  @read += 1 if ret
  ret
end

#pos ⇒ Object

Returns the current read pointer in the EntryStream.



525
526
527
 
# File 'lib/amp/dependencies/minitar.rb', line 525

def pos
  @read
end

#read(len = nil) ⇒ Object

Reads len bytes (or all remaining data) from the entry. Returns nil if there is no more data to read.



488
489
490
491
492
493
494
495
 
# File 'lib/amp/dependencies/minitar.rb', line 488

def read(len = nil)
  return nil if @read >= @size
  len ||= @size - @read
  max_read = [len, @size - @read].min
  ret = @io.read(max_read)
  @read += ret.size
  ret
end

#rewind ⇒ Object

Sets the current read pointer to the beginning of the EntryStream.

Raises:



530
531
532
533
534
 
# File 'lib/amp/dependencies/minitar.rb', line 530

def rewind
  raise NonSeekableStream unless @io.respond_to?(:pos=)
  @io.pos = @orig_pos
  @read = 0
end