""" Python 'uu_codec' Codec - UU content transfer encoding
Unlike most of the other codecs which target Unicode, this codec
will return Python string objects for both encode and decode.
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.
def uu_encode(input,errors
='strict',filename
='<data>',mode
=0666):
""" Encodes the object input and returns a tuple (output
object, length consumed).
errors defines the error handling to apply. It defaults to
'strict' handling which is the only currently supported
error handling for this codec.
assert errors
== 'strict'
from cStringIO
import StringIO
from binascii
import b2a_uu
write('begin %o %s\n' % (mode
& 0777, filename
))
return (outfile
.getvalue(), len(input))
def uu_decode(input,errors
='strict'):
""" Decodes the object input and returns a tuple (output
object, length consumed).
input must be an object which provides the bf_getreadbuf
buffer slot. Python strings, buffer objects and memory
mapped files are examples of objects providing this slot.
errors defines the error handling to apply. It defaults to
'strict' handling which is the only currently supported
error handling for this codec.
Note: filename and file mode information in the input data is
assert errors
== 'strict'
from cStringIO
import StringIO
from binascii
import a2b_uu
readline
= infile
.readline
# Find start of encoded data
raise ValueError, 'Missing "begin" line in input data'
except binascii
.Error
, v
:
# Workaround for broken uuencoders by /Fredrik Lundh
nbytes
= (((ord(s
[0])-32) & 63) * 4 + 5) / 3
data
= a2b_uu(s
[:nbytes
])
#sys.stderr.write("Warning: %s\n" % str(v))
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 StreamWriter(Codec
,codecs
.StreamWriter
):
class StreamReader(Codec
,codecs
.StreamReader
):
return (uu_encode
,uu_decode
,StreamReader
,StreamWriter
)