Class: Stack

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/AoBane/utilities.rb

Overview

CLAZ declare############################################

Constant Summary collapse

@@log = 
Logger.new(STDOUT)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Stack

Returns a new instance of Stack.



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# File 'lib/AoBane/utilities.rb', line 347

def initialize
  @stack = []
  @sp = 0
end

Class Method Details

.destroy ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 402

def self.destroy
  if @stack.nil? then @stack = [] else @stack.clear end
  p @stack
  @sp = 0
end

.dump ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 398

def self.dump
  @@log.debug("Stack DUMP:#{@stack}")
end

Instance Method Details

#evalStackTop ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 376

def evalStackTop
  return @stack.last
end

#getSp ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 380

def getSp
  if @sp >= 0 then return @sp
  else raise FatalError,"SP is negative!"
  end
end

#insertNumber ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 372

def insertNumber
 #   return str
end

#isTopofStack(item) ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 390

def isTopofStack(item)
  if item == @stack.last then
    return true
  else
    return false
  end
end

#pop ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 363

def pop
  @@log.debug("#{__LINE__} pop")
  if (@stack.size - 1) >= 0 then @sp -= 1;return @stack.pop
  else
    raise SyntaxError,"Stack Under Flow!"
  end
  @@log.debug "#{@stack}"
end

#push(pair) ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 352

def push(pair)
  @@log.debug("#{__LINE__} push #{pair}")
  if (@stack.size + 1) < $MAX_STACK then
    @stack.push(pair)
    @sp += 1
    @@log.debug @stack
  else
    raise SyntaxError,"Stack Over Flow!"
  end
end

#sizeofStack ⇒ Object 



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# File 'lib/AoBane/utilities.rb', line 386

def sizeofStack
  return @stack.size
end