Class: ZipTricks::WriteAndTell

Inherits:
Object
  • Object
show all
Defined in:
lib/zip_tricks/write_and_tell.rb

Overview

A tiny wrapper over any object that supports :<<. Adds :tell and :advance_position_by.

Instance Method Summary collapse

Constructor Details

#initialize(io) ⇒ WriteAndTell

Returns a new instance of WriteAndTell.



6
7
8
9
 
# File 'lib/zip_tricks/write_and_tell.rb', line 6

def initialize(io)
  @io = io
  @pos = 0
end

Instance Method Details

#<<(bytes) ⇒ Object 



11
12
13
14
15
16
17
 
# File 'lib/zip_tricks/write_and_tell.rb', line 11

def <<(bytes)
  return self if bytes.nil?
  binary_bytes = binary(bytes)
  @io << binary_bytes
  @pos += binary_bytes.bytesize
  self
end

#advance_position_by(num_bytes) ⇒ Object 



19
20
21
 
# File 'lib/zip_tricks/write_and_tell.rb', line 19

def advance_position_by(num_bytes)
  @pos += num_bytes
end

#tell ⇒ Object 



23
24
25
 
# File 'lib/zip_tricks/write_and_tell.rb', line 23

def tell
  @pos
end