Class: SlowFat::Directory::Dentry

Inherits:
Object
  • Object
show all
Defined in:
lib/slowfat/dir.rb

Overview

Dentry represents one entry inside a Directory.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dir_data) ⇒ Dentry

Initialize a new directory entry (normally only called from Directory)



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# File 'lib/slowfat/dir.rb', line 84

def initialize(dir_data)
  case dir_data[0].ord
    when 0x00
      # end of directory entries
      @type = :end_of_dentries
      return
    when 0x2E
      # dot entry
      @dotdir = true
    when 0xE5
      # deleted file
      @deleted = true
  end
  (@filename, @extension, attrib_bits, reserved, mod_date, mod_time, @start_cluster, @size) = dir_data.unpack('A8A3Ca10vvvV')

  @read_only  = attrib_bits & 0x01 > 0
  @hidden     = attrib_bits & 0x02 > 0
  @system     = attrib_bits & 0x04 > 0
  @archive    = attrib_bits & 0x20 > 0
  @device     = attrib_bits & 0x40 > 0

  @type = :file
  @type = :volume_label if attrib_bits & 0x08 > 0
  @type = :directory if attrib_bits & 0x10 > 0
end

Instance Attribute Details

#extension ⇒ String (readonly) 



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# File 'lib/slowfat/dir.rb', line 73

def extension
  @extension
end

#filename ⇒ String (readonly) 



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# File 'lib/slowfat/dir.rb', line 71

def filename
  @filename
end

#size ⇒ Integer (readonly) 



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# File 'lib/slowfat/dir.rb', line 77

def size
  @size
end

#start_cluster ⇒ Integer (readonly) 



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# File 'lib/slowfat/dir.rb', line 75

def start_cluster
  @start_cluster
end

#type ⇒ Symbol (readonly) 



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# File 'lib/slowfat/dir.rb', line 79

def type
  @type
end

Instance Method Details

#archive? ⇒ Boolean

Returns true if this dentry has the archive attribute set



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# File 'lib/slowfat/dir.rb', line 130

def archive?
  @archive
end

#deleted? ⇒ Boolean

Returns true if this dentry is a file that has been deleted



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# File 'lib/slowfat/dir.rb', line 142

def deleted?
  @deleted
end

#device? ⇒ Boolean

Returns true if this dentry has the device attribute set



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# File 'lib/slowfat/dir.rb', line 136

def device?
  @device
end

#dotdir? ⇒ Boolean

Returns true if this dentry is a dot directory (. or ..)



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# File 'lib/slowfat/dir.rb', line 148

def dotdir?
  @dotdir
end

#hidden? ⇒ Boolean

Returns true if this dentry has the hidden attribute set



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# File 'lib/slowfat/dir.rb', line 118

def hidden?
  @hidden
end

#read_only? ⇒ Boolean

Returns true if this dentry has the read only attribute set



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# File 'lib/slowfat/dir.rb', line 112

def read_only?
  @read_only
end

#system? ⇒ Boolean

Returns true if this dentry has the system attribute set



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# File 'lib/slowfat/dir.rb', line 124

def system?
  @system
end