mirror of
git://projects.qi-hardware.com/openwrt-packages.git
synced 2024-12-23 20:42:25 +02:00
80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
|
""" Python 'hex_codec' Codec - 2-digit hex 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).
|
||
|
|
|
||
|
|
"""
|
||
|
|
import codecs, binascii
|
||
|
|
|
||
|
|
### Codec APIs
|
||
|
|
|
||
|
|
def hex_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 = binascii.b2a_hex(input)
|
||
|
|
return (output, len(input))
|
||
|
|
|
||
|
|
def hex_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 = binascii.a2b_hex(input)
|
||
|
|
return (output, len(input))
|
||
|
|
|
||
|
|
class Codec(codecs.Codec):
|
||
|
|
|
||
|
|
def encode(self, input,errors='strict'):
|
||
|
|
return hex_encode(input,errors)
|
||
|
|
def decode(self, input,errors='strict'):
|
||
|
|
return hex_decode(input,errors)
|
||
|
|
|
||
|
|
class IncrementalEncoder(codecs.IncrementalEncoder):
|
||
|
|
def encode(self, input, final=False):
|
||
|
|
assert self.errors == 'strict'
|
||
|
|
return binascii.b2a_hex(input)
|
||
|
|
|
||
|
|
class IncrementalDecoder(codecs.IncrementalDecoder):
|
||
|
|
def decode(self, input, final=False):
|
||
|
|
assert self.errors == 'strict'
|
||
|
|
return binascii.a2b_hex(input)
|
||
|
|
|
||
|
|
class StreamWriter(Codec,codecs.StreamWriter):
|
||
|
|
pass
|
||
|
|
|
||
|
|
class StreamReader(Codec,codecs.StreamReader):
|
||
|
|
pass
|
||
|
|
|
||
|
|
### encodings module API
|
||
|
|
|
||
|
|
def getregentry():
|
||
|
|
return codecs.CodecInfo(
|
||
|
|
name='hex',
|
||
|
|
encode=hex_encode,
|
||
|
|
decode=hex_decode,
|
||
|
|
incrementalencoder=IncrementalEncoder,
|
||
|
|
incrementaldecoder=IncrementalDecoder,
|
||
|
|
streamwriter=StreamWriter,
|
||
|
|
streamreader=StreamReader,
|
||
|
|
)
|