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復活の呪文
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#!/usr/bin/python | |
# -*- coding: utf-8 -*- | |
import re | |
import sys | |
class FukkatsuEncoder: | |
__USABLE_CHARS = \ | |
'あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほ' \ | |
'まみむめもらりるれろがぎぐげござじずぜぞばびぶべぼぱぴぷぺぽ' \ | |
'やゆよわ' | |
def encode(self, raw: bytes) -> str: | |
b = ''.join(map(lambda c: format(c, '08b'), raw)) | |
# 6の倍数になるようゼロ埋めする | |
b += '00000' | |
b = b[0:-(len(b)%6)] | |
# 連番が偶数となる要素は空文字なので除外する | |
encoded = ''.join(map(lambda c: self.__USABLE_CHARS[int(c, 2)], \ | |
re.split('(.{6})', b)[1::2] \ | |
)) | |
return encoded | |
def decode(self, encoded: str) -> bytes: | |
b = ''.join(map(lambda c: format(self.__USABLE_CHARS.find(c), '06b'), \ | |
encoded)) | |
# 8の倍数に満たない場合、末尾は捨てられてしまうので問題なし | |
raw = bytes(map(lambda i: int(i, 2), \ | |
re.split('(.{8})', b)[1::2])) | |
return raw | |
def main(): | |
fe = FukkatsuEncoder() | |
print(fe.encode('あいう'.encode())) | |
# => ぴぴきうぴぴきおぴぴきき | |
print(fe.decode('ぴぴきうぴぴきおぴぴきき').decode()) | |
# => あいう | |
if __name__ == '__main__': | |
main() |
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