Class: RELI::Malbolge

Inherits:
Object
  • Object
show all
Defined in:
lib/reli/malbolge.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Malbolge

Returns a new instance of Malbolge.


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# File 'lib/reli/malbolge.rb', line 3

def initialize(options = {})
end

Instance Method Details

#crypt1(m) ⇒ Object


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# File 'lib/reli/malbolge.rb', line 64

def crypt1(m)
  m = get m if m.class == Array
  "+b(29e*j1VMEKLyC})8&m#~W>qxdRp0wkrUo[D7,XTcA\"lI.v%{gJh4G\\[email protected]`_3i<?Z';FNQuY]szf$!BS/|t:Pn6^Ha"
    .split(//)[(m - 33 + @c).modulo 94].ord
end

#crypt2(m) ⇒ Object


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# File 'lib/reli/malbolge.rb', line 70

def crypt2(m)
  "5z]&gqtyfr$(we4{WP)H-Zn,[%\\3dL+Q;>U!pJS72FhOA1CB6v^=I_0/8|jsb9m<.TVac`uY*MK'X~xDl}REokN:#?G\"[email protected]"
    .split(//)[((get m) - 33).modulo 94].ord
end

#crz(a, b) ⇒ Object


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# File 'lib/reli/malbolge.rb', line 75

def crz(a, b)
  a = get a if a.class == Array
  [a, b].map { |item|
    sprintf("%010d", item.to_s(3).to_i).split(//).map { |char| char.ord - 0x30 }
  }.transpose.map { |items|
    ([1, 0, 0, 1, 0, 2, 2, 2, 1][items[0] * 3 + items[1]] + 0x30).chr
  }.join.to_i(3)
end

#get(addr) ⇒ Object


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# File 'lib/reli/malbolge.rb', line 12

def get(addr)
  a = addr[0]
  @memory[a] = get_orid a if a >= @memory.length
  return @memory[a]
end

#get_orid(a) ⇒ Object

lazy evaluation


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# File 'lib/reli/malbolge.rb', line 7

def get_orid(a)
  @oridinal_memory[a] = crz get_orid(a - 2), get_orid(a - 1) if a >= @oridinal_memory.length
  return @oridinal_memory[a]
end

#inc(n) ⇒ Object


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# File 'lib/reli/malbolge.rb', line 89

def inc(n)
  n += 1
  n = 0 if n == 3**10
  return n
end

#rotrObject


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# File 'lib/reli/malbolge.rb', line 84

def rotr()
  @memory[@d] += ((get [@d]).modulo 3) * 3 ** 10
  @memory[@d] /= 3
end

#run(code_) ⇒ Object


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# File 'lib/reli/malbolge.rb', line 18

def run(code_)
  code = code_.split(//u).map(&:ord)
  @a = 0
  @c = 0
  @d = 0

  # load step
  @buffer = []
  @oridinal_memory = @memory = []
  for char in code
    case crypt1 char
    when 42, 47, 60, 105, 106, 111, 112, 118
      @oridinal_memory[@c] = char
    else
      # error
      next
    end
    @c += 1
  end

  # run
  @c = 0
  while (crypt1 [@c]) != 118
    case crypt1 [@c]
    when 106
      @d = get [@d]
    when 104
      @c = get [@d]
    when 42
      rotr
      @a = get [@d]
    when 112
      @a = @memory[@d] = crz([@d], @a)
    when 60
      @buffer[@buffer.length] = @a
    when 47
      @a = $stdin.getc.ord
    end
    @memory[@c] = crypt2 [@c]
    @c = inc @c
    @d = inc @d
  end

  @buffer.map { |a| (a.modulo 256).chr}.join
end