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class BrainInterpreter(object):
def __init__(self):
self.table = [0] * 30000
self.pointer = 0
def interp_char(self, code, code_pointer, input, output):
char_code = code[code_pointer]
if char_code == '>':
self.pointer += 1
elif char_code == '<':
self.pointer -= 1
elif char_code == '+':
self.table[self.pointer] += 1
elif char_code == '-':
self.table[self.pointer] -= 1
elif char_code == '.':
output.write(chr(self.table[self.pointer]))
elif char_code == ',':
self.table[self.pointer] = ord(input.read(1))
elif char_code == '[':
# find corresponding ]
if self.table[self.pointer] == 0:
need = 1
p = code_pointer + 1
while need > 0:
if code[p] == ']':
need -= 1
elif code[p] == '[':
need += 1
p += 1
return p
elif char_code == ']':
if self.table[self.pointer] != 0:
need = 1
p = code_pointer - 1
while need > 0:
if code[p] == ']':
need += 1
elif code[p] == '[':
need -= 1
p -= 1
return p + 2
return code_pointer + 1
def interpret(self, code, input_string, output_io):
code_pointer = 0
while code_pointer < len(code):
code_pointer = self.interp_char(code, code_pointer,
input_string, output_io)
#print code_pointer, self.table[:5]
return output_io
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