mirror of
https://github.com/python/cpython.git
synced 2025-10-31 05:31:20 +00:00
64 lines
1.8 KiB
Python
64 lines
1.8 KiB
Python
""" Python 'bz2_codec' Codec - bz2 compression encoding
|
|
|
|
Unlike most of the other codecs which target Unicode, this codec
|
|
will return Python string objects for both encode and decode.
|
|
|
|
Adapted by Raymond Hettinger from zlib_codec.py which was written
|
|
by Marc-Andre Lemburg (mal@lemburg.com).
|
|
|
|
"""
|
|
import codecs
|
|
import bz2 # this codec needs the optional bz2 module !
|
|
|
|
### Codec APIs
|
|
|
|
def bz2_encode(input,errors='strict'):
|
|
|
|
""" 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'
|
|
output = bz2.compress(input)
|
|
return (output, len(input))
|
|
|
|
def bz2_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.
|
|
|
|
"""
|
|
assert errors == 'strict'
|
|
output = bz2.decompress(input)
|
|
return (output, len(input))
|
|
|
|
class Codec(codecs.Codec):
|
|
|
|
def encode(self, input, errors='strict'):
|
|
return bz2_encode(input, errors)
|
|
def decode(self, input, errors='strict'):
|
|
return bz2_decode(input, errors)
|
|
|
|
class StreamWriter(Codec,codecs.StreamWriter):
|
|
pass
|
|
|
|
class StreamReader(Codec,codecs.StreamReader):
|
|
pass
|
|
|
|
### encodings module API
|
|
|
|
def getregentry():
|
|
|
|
return (bz2_encode,bz2_decode,StreamReader,StreamWriter)
|