class IRB::StdioInputMethod

Public Class Methods

new() click to toggle source

Creates a new input method object

Calls superclass method IRB::InputMethod::new

# File lib/irb/input-method.rb, line 64
def initialize
  super
  @line_no = 0
  @line = []
  @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
  @stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
end

Public Instance Methods

encoding() click to toggle source

The external encoding for standard input.

# File lib/irb/input-method.rb, line 115
def encoding
  @stdin.external_encoding
end

eof?() click to toggle source

Whether the end of this input method has been reached, returns true if there is no more data to read.

See IO#eof? for more information.

# File lib/irb/input-method.rb, line 85
def eof?
  rs, = IO.select([@stdin], [], [], 0.00001)
  if rs and rs[0]
    c = @stdin.getc
    result = c.nil? ? true : false
    @stdin.ungetc(c) unless c.nil?
    result
  else # buffer is empty
    false
  end
end

gets() click to toggle source

Reads the next line from this input method.

See IO#gets for more information.

# File lib/irb/input-method.rb, line 75
def gets
  print @prompt
  line = @stdin.gets
  @line[@line_no += 1] = line
end

inspect() click to toggle source

For debug message

# File lib/irb/input-method.rb, line 120
def inspect
  'StdioInputMethod'
end

line(line_no) click to toggle source

Returns the current line number for io.

line counts the number of times gets is called.

See IO#lineno for more information.

# File lib/irb/input-method.rb, line 110
def line(line_no)
  @line[line_no]
end

readable_after_eof?() click to toggle source

Whether this input method is still readable when there is no more data to read.

See IO#eof for more information.

# File lib/irb/input-method.rb, line 101
def readable_after_eof?
  true
end