Class: IO

Inherits:
Object show all
Defined in:
lib/backports/1.9/io.rb,
lib/backports/1.8.7/io.rb

Instance Method Summary collapse

Instance Method Details

#binread(file, *arg) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/backports/1.9/io.rb', line 3

def binread(file, *arg)
  raise ArgumentError, "wrong number of arguments (#{1+arg.size} for 1..3)" unless arg.size < 3
  File.open(Backports.convert_to_path(file),"rb") do |f|
    f.read(*arg)
  end
end

#bytes ⇒ Object

Standard in ruby 1.8.7+. See official documentation



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# File 'lib/backports/1.8.7/io.rb', line 10

def bytes
  to_enum :each_byte
end

#chars ⇒ Object

Standard in ruby 1.8.7+. See official documentation



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# File 'lib/backports/1.8.7/io.rb', line 15

def chars
  to_enum :each_char
end

#each_char ⇒ Object

Standard in ruby 1.8.7+. See official documentation



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# File 'lib/backports/1.8.7/io.rb', line 20

def each_char
  return to_enum(:each_char) unless block_given?
  if $KCODE == "UTF-8"
    lookup = 7.downto(4)
    while c = read(1) do
      n = c[0]
      leftmost_zero_bit = lookup.find{|i| n[i].zero? }
      case leftmost_zero_bit
      when 7 # ASCII
        yield c
      when 6 # UTF 8 complementary characters
        next # Encoding error, ignore
      else
        more = read(6-leftmost_zero_bit)
        break unless more
        yield c+more
      end
    end
  else
    while s = read(1)
      yield s
    end
  end

  self
end

#lines(*args) ⇒ Object

Standard in ruby 1.8.7+. See official documentation



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# File 'lib/backports/1.8.7/io.rb', line 51

def lines(*args)
  to_enum :each_line, *args
end