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[rfc1751] / rfc1751.py
1 # Copyright (c) 2024 Scott Worley <scottworley@scottworley.com>
2 #
3 # Permission to use, copy, modify, and distribute this software for any
4 # purpose with or without fee is hereby granted, provided that the above
5 # copyright notice and this permission notice appear in all copies.
6 #
7 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
10 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
12 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
13 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15
16 import sys
17
18 from rfc1751wordlist import WORD_LIST, WORD_LIST_SIZE
19
20
21 WORD_LIST_INVERTED = {word: i for (i, word) in enumerate(WORD_LIST)}
22 assert len(WORD_LIST_INVERTED) == WORD_LIST_SIZE
23
24
25 def encode_actual(x: int) -> list[str]:
26 return [] if x <= 0 else encode_actual(
27 x // WORD_LIST_SIZE) + [WORD_LIST[x % WORD_LIST_SIZE]]
28
29
30 def encode(x: int) -> list[str]:
31 return [WORD_LIST[x]] if x == 0 else encode_actual(x)
32
33
34 def decode(x: list[str]) -> int:
35 return WORD_LIST_SIZE * decode(x[:-1]) + \
36 WORD_LIST_INVERTED[x[-1]] if x else 0
37
38
39 def main() -> None:
40 if sys.argv[1].isnumeric():
41 print(' '.join(encode(int(sys.argv[1]))))
42 elif len(sys.argv) == 2:
43 print(decode(sys.argv[1].split(' ')))
44 else:
45 print(decode(sys.argv[1:]))
46
47
48 if __name__ == '__main__':
49 main()