Class: FSM

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

Direct Known Subclasses

Parser

Defined Under Namespace

Classes: State

Constant Summary collapse

FSM_S_INIT = 
0

Instance Method Summary collapse

Constructor Details

#initialize ⇒ FSM

Returns a new instance of FSM.



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# File 'lib/netutils/fsm.rb', line 12

def initialize
  @state = FSM_S_INIT
  @fsm = Array.new
  @name2index = Hash.new
  @index2name = Array.new
end

Instance Method Details

#add(name, cb) ⇒ Object 



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# File 'lib/netutils/fsm.rb', line 19

def add(name, cb)
  if @name2index.key?(name)
    raise(ArgumentError, "duplicated key \"#{name}\"")
  end
  @fsm.push(State.new(cb))
  idx = @fsm.length - 1
  @name2index[name] = idx
  @index2name[idx]  = name
end

#cb ⇒ Object 



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# File 'lib/netutils/fsm.rb', line 29

def cb
  return @fsm[@state].cb
end

#changeto(name) ⇒ Object 



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# File 'lib/netutils/fsm.rb', line 33

def changeto(name)
  if ! @name2index.key?(name)
    raise(ArgumentError, "unnown state: \"#{name}\"")
  end
  @state = @name2index[name]
end

#state_name ⇒ Object 



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# File 'lib/netutils/fsm.rb', line 40

def state_name
  return @index2name[@state]
end