class Interpreter:
def __init__(self, programm):
self.__LoopStack__ = []
self.__PC__ = 0
legal = set('+-<>.,[]')
self.__Programm__ = ''.join(c for c in programm if c in legal)
self.__Memory__ = Memory()
def Run(self):
while self.__PC__ < self.__Programm__.__len__():
if self.__Programm__[self.__PC__] == '+':
self.__Memory__.Increment()
elif self.__Programm__[self.__PC__] == '-':
self.__Memory__.Decrement()
elif self.__Programm__[self.__PC__] == '>':
self.__Memory__.MoveRight()
elif self.__Programm__[self.__PC__] == '<':
self.__Memory__.MoveLeft()
elif self.__Programm__[self.__PC__] == '[':
if self.__Memory__.GetValue() > 0:
self.__LoopStack__.append(self.__PC__)
else:
self.__GotoEndLoop__()
elif self.__Programm__[self.__PC__] == ']':
if self.__LoopStack__.__len__() <= 0:
raise Exception("Loop did not had a opening bracket")
self.__PC__ = self.__LoopStack__.pop() - 1
elif self.__Programm__[self.__PC__] == ".":
sys.stdout.write(chr(self.__Memory__.GetValue()))
sys.stdout.flush()
elif self.__Programm__[self.__PC__] == ',':
self.__Memory__.SetValue(ord(sys.stdin.read(1)))
self.__PC__ += 1
def __GotoEndLoop__(self):
op = 0
while 1:
self.__PC__ += 1
if self.__PC__ > self.__Programm__.__len__():
raise Exception("No closing Bracket for Loop")
if self.__Programm__[self.__PC__] == '[':
op += 1
elif self.__Programm__[self.__PC__] == ']':
op -= 1
if op < 0:
return
