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83 lines
1.9 KiB
83 lines
1.9 KiB
import sys
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def get_loop_code(code, ip):
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result = code[ip+1:]
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level = 1
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count = 0
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while count < len(result) and level > 0:
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if result[count] == '[':
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level += 1
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if result[count] == ']':
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level -= 1
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count += 1
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return result[:count-1]
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def loop_code(code, cells, pointer, ip):
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output = ""
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while cells[pointer] != 0:
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output += execute(code, cells, pointer, ip)
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def execute(code, cells, pointer = 0, ip = 0):
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ip = 0
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output = ""
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while ip < len(code):
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instruction = code[ip]
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if instruction == '>':
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pointer += 1
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if pointer > len(cells):
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pointer = 0
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elif instruction == '<':
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pointer -= 1
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if pointer < 0:
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pointer = len(cells)
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elif instruction == '+':
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cells[pointer] = cells[pointer] + 1
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elif instruction == '-':
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cells[pointer] = cells[pointer] - 1
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elif instruction == '.':
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output += chr(cells[pointer])
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elif instruction == ',':
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input_data = input()
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if len(input_data) > 1:
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data = ord(input_data[0])
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else:
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data = ord(input_data)
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cells[pointer] = data
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elif instruction == '[':
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inner_code = get_loop_code(code, ip)
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loop_code(inner_code, cells, pointer, ip)
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ip += len(inner_code) # Jump away after we executed the loop
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ip += 1
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return output
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if __name__ == "__main__":
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code = """++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.< <+++++++++++++++.>.+++.------.--------.>+.>."""
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if len(sys.argv) > 1:
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filename = sys.argv[1]
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with open(filename, 'r') as f:
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code = f.read()
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cells = [0] * 500
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output = execute(code, cells)
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print(output)
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