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comparison CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/python3.8/encodings/zlib_codec.py @ 69:33d812a61356

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planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
author jpayne
date Tue, 18 Mar 2025 17:55:14 -0400
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67:0e9998148a16 69:33d812a61356
1 """Python 'zlib_codec' Codec - zlib compression encoding.
2
3 This codec de/encodes from bytes to bytes.
4
5 Written by Marc-Andre Lemburg (mal@lemburg.com).
6 """
7
8 import codecs
9 import zlib # this codec needs the optional zlib module !
10
11 ### Codec APIs
12
13 def zlib_encode(input, errors='strict'):
14 assert errors == 'strict'
15 return (zlib.compress(input), len(input))
16
17 def zlib_decode(input, errors='strict'):
18 assert errors == 'strict'
19 return (zlib.decompress(input), len(input))
20
21 class Codec(codecs.Codec):
22 def encode(self, input, errors='strict'):
23 return zlib_encode(input, errors)
24 def decode(self, input, errors='strict'):
25 return zlib_decode(input, errors)
26
27 class IncrementalEncoder(codecs.IncrementalEncoder):
28 def __init__(self, errors='strict'):
29 assert errors == 'strict'
30 self.errors = errors
31 self.compressobj = zlib.compressobj()
32
33 def encode(self, input, final=False):
34 if final:
35 c = self.compressobj.compress(input)
36 return c + self.compressobj.flush()
37 else:
38 return self.compressobj.compress(input)
39
40 def reset(self):
41 self.compressobj = zlib.compressobj()
42
43 class IncrementalDecoder(codecs.IncrementalDecoder):
44 def __init__(self, errors='strict'):
45 assert errors == 'strict'
46 self.errors = errors
47 self.decompressobj = zlib.decompressobj()
48
49 def decode(self, input, final=False):
50 if final:
51 c = self.decompressobj.decompress(input)
52 return c + self.decompressobj.flush()
53 else:
54 return self.decompressobj.decompress(input)
55
56 def reset(self):
57 self.decompressobj = zlib.decompressobj()
58
59 class StreamWriter(Codec, codecs.StreamWriter):
60 charbuffertype = bytes
61
62 class StreamReader(Codec, codecs.StreamReader):
63 charbuffertype = bytes
64
65 ### encodings module API
66
67 def getregentry():
68 return codecs.CodecInfo(
69 name='zlib',
70 encode=zlib_encode,
71 decode=zlib_decode,
72 incrementalencoder=IncrementalEncoder,
73 incrementaldecoder=IncrementalDecoder,
74 streamreader=StreamReader,
75 streamwriter=StreamWriter,
76 _is_text_encoding=False,
77 )