1- from typing import Union
2-
3-
4- class B91:
5- ALPHABET = [
6- 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
7- 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
8- 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
9- 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
10- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '!', '#', '$',
11- '%', '&', '(', ')', '*', '+', ',', '.', '/', ':', ';', '<', '=',
12- '>', '?', '@', '[', ']', '^', '_', '`', '{', '|', '}', '~', '"'
13- ]
14-
15- DECODE_TABLE = {char: idx for idx, char in enumerate(ALPHABET)}
16-
17- @classmethod
18- def decode(cls, encoded_data: Union[str, bytes], encoding: str = "utf-8") -> bytes:
19- """
20- Decodes a Base91-encoded string into its original binary form.
21-
22- Args:
23- encoded_data (Union[str, bytes]): Base91-encoded input data. If `bytes`, it is decoded as UTF-8.
24- encoding (str): The encoding to use if `encoded_data` is provided as a string. Default is 'utf-8'.
25-
26- Returns:
27- bytes: The decoded binary data.
28-
29- Raises:
30- ValueError: If the input contains invalid Base91 characters.
31- """
32- if isinstance(encoded_data, bytes):
33- encoded_data = encoded_data.decode(encoding)
34-
35- v = -1
36- b = 0
37- n = 0
38- out = bytearray()
39-
40- for char in encoded_data:
41- if char not in cls.DECODE_TABLE:
42- raise ValueError(f"Invalid Base91 character: {char}")
43- c = cls.DECODE_TABLE[char]
44- if v < 0:
45- v = c
46- else:
47- v += c * 91
48- b |= v << n
49- n += 13 if (v & 8191) > 88 else 14
50- while n >= 8:
51- out.append(b & 255)
52- b >>= 8
53- n -= 8
54- v = -1
55-
56- if v >= 0:
57- out.append((b | v << n) & 255)
58-
59- return bytes(out)
60-
61- @classmethod
62- def encode(cls, data: Union[bytes, str], encoding: str = "utf-8") -> bytes:
63- """
64- Encodes binary data into a Base91-encoded string.
65-
66- Args:
67- data (Union[bytes, str]): Input binary data to encode. If `str`, it is encoded as UTF-8.
68- encoding (str): The encoding to use if `data` is provided as a string. Default is 'utf-8'.
69-
70- Returns:
71- str: The Base91-encoded string.
72- """
73- if isinstance(data, str):
74- data = data.encode(encoding)
75-
76- b = 0
77- n = 0
78- out = []
79-
80- for byte in data:
81- b |= byte << n
82- n += 8
83- if n > 13:
84- v = b & 8191
85- if v > 88:
86- b >>= 13
87- n -= 13
88- else:
89- v = b & 16383
90- b >>= 14
91- n -= 14
92- out.append(cls.ALPHABET[v % 91])
93- out.append(cls.ALPHABET[v // 91])
94-
95- if n:
96- out.append(cls.ALPHABET[b % 91])
97- if n > 7 or b > 90:
98- out.append(cls.ALPHABET[b // 91])
99-
100- return ''.join(out).encode(encoding)
1+ from z85base91 import B91
2+ import warnings
3+
4+ # Deprecation warning
5+ warnings.warn(
6+ "Importing from hivemind_bus_client.encodings is deprecated and will be removed in a future release. "
7+ "Please update your code to use the new package 'z85base91'",
8+ DeprecationWarning,
9+ stacklevel=2,
10+ )
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