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| author | AlexSm <alex@ydb.tech> | 2024-03-05 10:40:59 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-03-05 12:40:59 +0300 |
| commit | 1ac13c847b5358faba44dbb638a828e24369467b (patch) | |
| tree | 07672b4dd3604ad3dee540a02c6494cb7d10dc3d /contrib/tools/python3/Lib/encodings/uu_codec.py | |
| parent | ffcca3e7f7958ddc6487b91d3df8c01054bd0638 (diff) | |
| download | ydb-1ac13c847b5358faba44dbb638a828e24369467b.tar.gz | |
Library import 16 (#2433)
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Diffstat (limited to 'contrib/tools/python3/Lib/encodings/uu_codec.py')
| -rw-r--r-- | contrib/tools/python3/Lib/encodings/uu_codec.py | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/contrib/tools/python3/Lib/encodings/uu_codec.py b/contrib/tools/python3/Lib/encodings/uu_codec.py new file mode 100644 index 0000000000..4e58c62fe9 --- /dev/null +++ b/contrib/tools/python3/Lib/encodings/uu_codec.py @@ -0,0 +1,103 @@ +"""Python 'uu_codec' Codec - UU content transfer encoding. + +This codec de/encodes from bytes to bytes. + +Written by Marc-Andre Lemburg (mal@lemburg.com). Some details were +adapted from uu.py which was written by Lance Ellinghouse and +modified by Jack Jansen and Fredrik Lundh. +""" + +import codecs +import binascii +from io import BytesIO + +### Codec APIs + +def uu_encode(input, errors='strict', filename='<data>', mode=0o666): + assert errors == 'strict' + infile = BytesIO(input) + outfile = BytesIO() + read = infile.read + write = outfile.write + + # Remove newline chars from filename + filename = filename.replace('\n','\\n') + filename = filename.replace('\r','\\r') + + # Encode + write(('begin %o %s\n' % (mode & 0o777, filename)).encode('ascii')) + chunk = read(45) + while chunk: + write(binascii.b2a_uu(chunk)) + chunk = read(45) + write(b' \nend\n') + + return (outfile.getvalue(), len(input)) + +def uu_decode(input, errors='strict'): + assert errors == 'strict' + infile = BytesIO(input) + outfile = BytesIO() + readline = infile.readline + write = outfile.write + + # Find start of encoded data + while 1: + s = readline() + if not s: + raise ValueError('Missing "begin" line in input data') + if s[:5] == b'begin': + break + + # Decode + while True: + s = readline() + if not s or s == b'end\n': + break + try: + data = binascii.a2b_uu(s) + except binascii.Error as v: + # Workaround for broken uuencoders by /Fredrik Lundh + nbytes = (((s[0]-32) & 63) * 4 + 5) // 3 + data = binascii.a2b_uu(s[:nbytes]) + #sys.stderr.write("Warning: %s\n" % str(v)) + write(data) + if not s: + raise ValueError('Truncated input data') + + return (outfile.getvalue(), len(input)) + +class Codec(codecs.Codec): + def encode(self, input, errors='strict'): + return uu_encode(input, errors) + + def decode(self, input, errors='strict'): + return uu_decode(input, errors) + +class IncrementalEncoder(codecs.IncrementalEncoder): + def encode(self, input, final=False): + return uu_encode(input, self.errors)[0] + +class IncrementalDecoder(codecs.IncrementalDecoder): + def decode(self, input, final=False): + return uu_decode(input, self.errors)[0] + +class StreamWriter(Codec, codecs.StreamWriter): + charbuffertype = bytes + +class StreamReader(Codec, codecs.StreamReader): + charbuffertype = bytes + +### encodings module API + +def getregentry(): + return codecs.CodecInfo( + name='uu', + encode=uu_encode, + decode=uu_decode, + incrementalencoder=IncrementalEncoder, + incrementaldecoder=IncrementalDecoder, + streamreader=StreamReader, + streamwriter=StreamWriter, + _is_text_encoding=False, + ) |