#7475: add (un)transform method to bytes/bytearray and str, add back codecs that can be used with them from Python 2.
diff --git a/Lib/encodings/uu_codec.py b/Lib/encodings/uu_codec.py
new file mode 100644
index 0000000..69c6f17
--- /dev/null
+++ b/Lib/encodings/uu_codec.py
@@ -0,0 +1,99 @@
+"""Python 'uu_codec' Codec - UU content transfer encoding.
+
+This codec de/encodes from bytes to bytes and is therefore usable with
+bytes.transform() and bytes.untransform().
+
+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
+
+ # 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 = (((ord(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,
+ )