Class: Brainfucktt::REPL

Inherits:
Object
  • Object
show all
Defined in:
lib/brainfucktt/repl.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ REPL

Returns a new instance of REPL.



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# File 'lib/brainfucktt/repl.rb', line 20

def initialize
  trap('INT') { self.exit }
  @input, @output = nil
  @parser = Brainfucktt::Parser.new
end

Class Method Details

.instance ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 9

def instance
  @instance ||= new
end

.run ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 13

def run
  puts instance.help
  instance.loop
end

Instance Method Details

#ascii ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 89

def ascii
  @parser.data.bytes.collect(&:to_ascii).join
end

#binary ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 93

def binary
  @parser.data.bytes.collect(&:to_binary).join(' ')
end

#decimal ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 97

def decimal
  @parser.data.bytes.collect(&:to_i).join(' ')
end

#eval ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 31

def eval
  case @input.strip
  when 'help' then puts help
  when '?' then puts help
  when 'quit' then self.exit
  when 'exit' then self.exit
  when 'hex' then puts hex
  when 'ascii' then puts ascii
  when 'binary' then puts binary
  when 'decimal' then puts decimal
  else; @parser.run(@input)
  end
end

#exit ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 80

def exit
  puts
  Kernel.exit
end

#help ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 70

def help
  result = ''
  result << "Type 'help' or '?' for help.\n"
  result << "Type 'hex'     to output the data buffer in hexadecimal.\n"
  result << "Type 'ascii'   to output the data buffer in ASCII.\n"
  result << "Type 'binary'  to output the data buffer in binary.\n"
  result << "Type 'decimal' to output the data buffer in decimal.\n"
  result << "Type 'exit' or 'quit' or press CTRL-C to exit.\n\n"
end

#hex ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 85

def hex
  @parser.data.bytes.collect(&:to_hex).join(' ')
end

#loop ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 58

def loop
  Kernel.loop do
    # begin
      read
      eval
      print
    # rescue
    #   # Do squat
    # end
  end
end

#print ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 45

def print
  puts @parser.data.bytes.collect { |byte|
    byte_str = ''
    byte_str << (@parser.byte == byte ? '>' : '|')
    byte_str << byte.to_hex
    byte_str << (@parser.byte == byte ? '<' : '|')
    
    byte_str
  }.join(' ')
  
  @input = nil
end

#read ⇒ Object 



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# File 'lib/brainfucktt/repl.rb', line 26

def read
  Kernel.print '> '
  @input = gets
end