Class: Orenono::Brain

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

Overview

Brain

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, src = '') ⇒ Brain

Returns a new instance of Brain.



11
12
13
14
15
16
17
18
19
 
# File 'lib/brain.rb', line 11

def initialize(config, src = '')
  @config = config
  @src = src
  @tokens = @src.scan(/#{@config.token_patterns}/)
  @tape = Array.new(65_535) { 0 }
  @memory_cursol = 0
  @code_cursol = 0
  @loop_stack = []
end

Instance Attribute Details

#code_cursol ⇒ Object (readonly)

Returns the value of attribute code_cursol.



9
10
11
 
# File 'lib/brain.rb', line 9

def code_cursol
  @code_cursol
end

#config ⇒ Object (readonly)

Returns the value of attribute config.



8
9
10
 
# File 'lib/brain.rb', line 8

def config
  @config
end

#loop_stack ⇒ Object (readonly)

Returns the value of attribute loop_stack.



9
10
11
 
# File 'lib/brain.rb', line 9

def loop_stack
  @loop_stack
end

#memory_cursol ⇒ Object (readonly)

Returns the value of attribute memory_cursol.



9
10
11
 
# File 'lib/brain.rb', line 9

def memory_cursol
  @memory_cursol
end

#src ⇒ Object (readonly)

Returns the value of attribute src.



8
9
10
 
# File 'lib/brain.rb', line 8

def src
  @src
end

#tape ⇒ Object (readonly)

Returns the value of attribute tape.



8
9
10
 
# File 'lib/brain.rb', line 8

def tape
  @tape
end

#tokens ⇒ Object (readonly)

Returns the value of attribute tokens.



8
9
10
 
# File 'lib/brain.rb', line 8

def tokens
  @tokens
end

Instance Method Details

#decrement ⇒ Object 



58
59
60
61
 
# File 'lib/brain.rb', line 58

def decrement
  fail InvalidMemoryAccessError if @tape[@memory_cursol].zero?
  @tape[@memory_cursol] -= 1
end

#display ⇒ Object 



96
97
98
 
# File 'lib/brain.rb', line 96

def display
  putc @tape[@memory_cursol]
end

#end_loop ⇒ Object 



82
83
84
85
 
# File 'lib/brain.rb', line 82

def end_loop
  fail InvalidLoopError, 'Invalid Loop.' if @loop_stack.empty?
  @code_cursol = @loop_stack.pop
end

#goto_end_loop_next ⇒ Object 



69
70
71
72
73
74
75
76
77
78
79
80
 
# File 'lib/brain.rb', line 69

def goto_end_loop_next
  hit_cnt = 0
  index = 0
  @tokens[@code_cursol..-1].each_with_index do |token, i|
    hit_cnt += 1 if token == @config.end_loop
    next unless hit_cnt == @loop_stack.size
    index = i + @code_cursol
    break
  end
  @loop_stack.pop
  @code_cursol = index + 1
end

#increment ⇒ Object

rubocop:enable CyclomaticComplexity, MethodLength



54
55
56
 
# File 'lib/brain.rb', line 54

def increment
  @tape[@memory_cursol] += 1
end

#next_cursol ⇒ Object 



87
88
89
 
# File 'lib/brain.rb', line 87

def next_cursol
  @memory_cursol += 1
end

#previous_cursol ⇒ Object 



91
92
93
94
 
# File 'lib/brain.rb', line 91

def previous_cursol
  fail InvalidCursolError, 'Invalid Cursol.' if @memory_cursol.zero?
  @memory_cursol -= 1
end

#read ⇒ Object 



100
101
102
 
# File 'lib/brain.rb', line 100

def read
  @tape[@memory_cursol] = STDIN.readchar.ord
end

#run ⇒ Object

rubocop:disable CyclomaticComplexity, MethodLength



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/brain.rb', line 22

def run
  loop do
    token = @tokens[@code_cursol]
    case token
    when @config.increment
      increment
      @code_cursol += 1
    when @config.decrement
      decrement
      @code_cursol += 1
    when @config.start_loop
      start_loop
    when @config.end_loop
      end_loop
    when @config.next_cursol
      next_cursol
      @code_cursol += 1
    when @config.previous_cursol
      previous_cursol
      @code_cursol += 1
    when @config.display
      display
      @code_cursol += 1
    when @config.read
      read
      @code_cursol += 1
    end
    break if @code_cursol >= @tokens.size
  end
end

#start_loop ⇒ Object 



63
64
65
66
67
 
# File 'lib/brain.rb', line 63

def start_loop
  @loop_stack << @code_cursol
  return goto_end_loop_next if @tape[@memory_cursol] == 0
  @code_cursol += 1
end