Class: Expletive::Dump

Inherits:
Object
  • Object
show all
Defined in:
lib/expletive/filters.rb

Instance Method Summary collapse

Constructor Details

#initialize(in_io = $stdin, out_io = $stdout) ⇒ Dump

Returns a new instance of Dump.



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# File 'lib/expletive/filters.rb', line 8

def initialize(in_io=$stdin, out_io=$stdout)
  @in = in_io
  @out = out_io
  @current_width = 0
end

Instance Method Details

#human_readable?(byte) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/expletive/filters.rb', line 42

def human_readable?(byte)
  (byte >= SPACE) && (byte <= TILDE)
end

#run ⇒ Object 



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# File 'lib/expletive/filters.rb', line 14

def run
  n = 0
  until @in.eof?
    byte = @in.readbyte
    case 
    when byte ==  BACKSLASH
      write_string "\\\\"
    when byte == NEWLINE
      write_string "\\n"
    when human_readable?(byte)
      write_string byte.chr 
    else
      write_string  "\\%02x" % byte
    end
  end
end

#start_new_line ⇒ Object 



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# File 'lib/expletive/filters.rb', line 31

def start_new_line
  @out.print("\n")
  @current_width = 0
end

#write_string(s) ⇒ Object 



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# File 'lib/expletive/filters.rb', line 36

def write_string(s)
  @out.print(s)
  @current_width += s.size
  start_new_line if @current_width > 60
end