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  1. '''[]
  2. txt = open('bftest.txt', 'r')
  3. code = [''.join([i.strip() for i in open('bftest.txt', 'r').readlines()])]
  4. txt.close()
  5. '''
  6. def bracketLen(code):
  7. 	for length in range(2, len(code) + 1):
  8. 		if code[:length].count('[') is code[:length].count(']'):
  9. 			return length
  10. 	else:
  11. 		return None
  12.  
  13. def calcLetter(stdin, code, memory, pointer, readpoint, stdout):
  14. 	letter = code[readpoint]
  15. 	if pointer not in memory:
  16. 		memory.update({pointer:0})
  17. 	if letter is '>':
  18. 		pointer = str(int(pointer) + 1)
  19. 		readpoint += 1
  20. 	elif letter is '<':
  21. 		pointer = str(int(pointer) - 1)
  22. 		readpoint += 1
  23. 	elif letter is '+':
  24. 		memory[pointer] = (memory[pointer] + 1) % 0xff
  25. 		memory[pointer] %= 256
  26. 		readpoint += 1
  27. 	elif letter is '-':
  28. 		memory[pointer] = (memory[pointer] - 1) % 0xff
  29. 		readpoint += 1
  30. 	elif letter is '.':
  31. 		stdout += chr(memory[pointer])
  32. 		readpoint += 1
  33. 	elif letter is ',':
  34. 		memory[pointer] = stdin.pop(0)
  35. 		readpoint += 1
  36. 	elif letter is '[':
  37. 		if memory[pointer]:
  38. 			readpoint += 1
  39. 		else:
  40. 			readpoint += bracketLen(code[readpoint:])
  41. 	elif letter is ']':
  42. 		if memory[pointer]:
  43. 			readpoint += - bracketLen(code[:readpoint + 1][::-1]) + 1
  44. 		else:
  45. 			readpoint += 1
  46. 	else:
  47. 		readpoint += 1
  48. 	return [stdin, code, memory, pointer, readpoint, stdout]
  49.  
  50. stdin, code, memory, pointer, readpoint, stdout= [
  51. 	[int(i) % 0xff for i in input().split()],
  52. 	input(),
  53. 	{'0' : 0},
  54. 	'0',
  55. 	0,
  56. 	'',
  57. ]
  58. while readpoint < len(code):
  59. 	stdin, code, memory, pointer, readpoint, stdout = calcLetter(stdin, code, memory, pointer, readpoint, stdout)
  60. print(stdout)
Success #stdin #stdout 0.01s 9992KB
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stdin
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+++++++++[->++++++++>+++++++++++>+++++<<<]>.>++.+++++++..+++.>-.------------.<++++++++.--------.+++.------.--------.>+.
stdout
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Hello, world!
https://ideone.com/NKh0yL
bdinterpreter.py
language:
Python 3 (python  3.9.5)
created:
7 years ago
visibility:
secret

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