Class: BoundedIO

Inherits:
Object
  • Object
show all
Defined in:
lib/excavate/extractors/cpio/cpio.rb

Overview

code is obtained from github.com/jordansissel/ruby-arr-pm/blob/8071591173ebb90dea27d5acfdde69a37dcb2744/cpio.rb rubocop:disable all

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(io, length, &eof_callback) ⇒ BoundedIO

Returns a new instance of BoundedIO.



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# File 'lib/excavate/extractors/cpio/cpio.rb', line 7

def initialize(io, length, &eof_callback)
  @io = io
  @length = length
  @remaining = length

  @eof_callback = eof_callback
  @eof = false
end

Instance Attribute Details

#length ⇒ Object (readonly)

Returns the value of attribute length.



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# File 'lib/excavate/extractors/cpio/cpio.rb', line 4

def length
  @length
end

#remaining ⇒ Object (readonly)

Returns the value of attribute remaining.



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# File 'lib/excavate/extractors/cpio/cpio.rb', line 5

def remaining
  @remaining
end

Instance Method Details

#eof? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/excavate/extractors/cpio/cpio.rb', line 30

def eof?
  return false if @remaining > 0
  return @eof if @eof

  @eof_callback.call
  @eof = true
end

#read(size = nil) ⇒ Object 



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# File 'lib/excavate/extractors/cpio/cpio.rb', line 16

def read(size=nil)
  return nil if eof?
  size = @remaining if size.nil?
  data = @io.read(size)
  @remaining -= data.bytesize
  eof?
  data
end

#sysread(size) ⇒ Object

Raises:

  • (EOFError) 


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# File 'lib/excavate/extractors/cpio/cpio.rb', line 25

def sysread(size)
  raise EOFError, "end of file reached" if eof?
  read(size)
end