92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
"""
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@author: Mateusz779
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"""
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pointer = 0
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cell = []
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code = ""
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def main():
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"""
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Main function
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"""
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global code, cell, pointer
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code = input("Enter the code: ")
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print("\n\n")
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if code != "":
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for i in range(len(code)):
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interpreter(code[i], i)
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print("\n\n")
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def interpreter(znak, i):
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"""
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Brainfuck interpreter
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> increment the data pointer (to point to the next cell to the right).
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< decrement the data pointer (to point to the next cell to the left).
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+ increment (increase by one) the byte at the data pointer.
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- decrement (decrease by one) the byte at the data pointer.
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. output the byte at the data pointer.
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, accept one byte of input, storing its value in the byte at the data pointer.
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[ if the byte at the data pointer is zero, then instead of
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moving the instruction pointer forward to the next command,
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jump it forward to the command after the matching ]
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] if the byte at the data pointer is nonzero, then instead of moving
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the instruction pointer forward to the next command,
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jump it back to the command after the matching [.
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"""
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global code, cell, pointer
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match znak:
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case ">":
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pointer += 1
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if(pointer > len(cell) - 1):
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cell.append(0)
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case "<":
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pointer -= 1
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if pointer < 0:
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pointer = 0
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cell.insert(0, 0)
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case "+":
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try:
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cell[pointer] += 1
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except:
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cell.append(0)
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cell[pointer] += 1
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case "-":
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try:
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cell[pointer] -= 1
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if cell[pointer] < 0:
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cell[pointer] = 0
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except:
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cell.append(0)
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case ".":
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try:
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if cell[pointer] == 10 or cell[pointer] == 13:
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print("\n")
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else:
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print(chr(cell[pointer]), end="")
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except:
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cell.append(0)
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print(chr(cell[pointer]), end="")
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case ",":
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try:
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cell[pointer] = ord(input("Enter a character: "))
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except:
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cell.append(0)
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cell[pointer] = ord(input("Enter a character: "))
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case "[":
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try:
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loop_begin = i
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if cell[pointer] != 0:
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loop_end = code.find("]", i)
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for a in range(0, cell[pointer]-1):
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for j in range(1, loop_end-loop_begin):
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interpreter(code[loop_begin + j], loop_begin + j)
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except:
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cell.append(0)
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if __name__ == '__main__':
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main()
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