/usr/lib/python3.2/encodings/utf_16.py is in python3.2-minimal 3.2.3-0ubuntu3.8.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | """ Python 'utf-16' Codec
Written by Marc-Andre Lemburg (mal@lemburg.com).
(c) Copyright CNRI, All Rights Reserved. NO WARRANTY.
"""
import codecs, sys
### Codec APIs
encode = codecs.utf_16_encode
def decode(input, errors='strict'):
return codecs.utf_16_decode(input, errors, True)
class IncrementalEncoder(codecs.IncrementalEncoder):
def __init__(self, errors='strict'):
codecs.IncrementalEncoder.__init__(self, errors)
self.encoder = None
def encode(self, input, final=False):
if self.encoder is None:
result = codecs.utf_16_encode(input, self.errors)[0]
if sys.byteorder == 'little':
self.encoder = codecs.utf_16_le_encode
else:
self.encoder = codecs.utf_16_be_encode
return result
return self.encoder(input, self.errors)[0]
def reset(self):
codecs.IncrementalEncoder.reset(self)
self.encoder = None
def getstate(self):
# state info we return to the caller:
# 0: stream is in natural order for this platform
# 2: endianness hasn't been determined yet
# (we're never writing in unnatural order)
return (2 if self.encoder is None else 0)
def setstate(self, state):
if state:
self.encoder = None
else:
if sys.byteorder == 'little':
self.encoder = codecs.utf_16_le_encode
else:
self.encoder = codecs.utf_16_be_encode
class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
def __init__(self, errors='strict'):
codecs.BufferedIncrementalDecoder.__init__(self, errors)
self.decoder = None
def _buffer_decode(self, input, errors, final):
if self.decoder is None:
(output, consumed, byteorder) = \
codecs.utf_16_ex_decode(input, errors, 0, final)
if byteorder == -1:
self.decoder = codecs.utf_16_le_decode
elif byteorder == 1:
self.decoder = codecs.utf_16_be_decode
elif consumed >= 2:
raise UnicodeError("UTF-16 stream does not start with BOM")
return (output, consumed)
return self.decoder(input, self.errors, final)
def reset(self):
codecs.BufferedIncrementalDecoder.reset(self)
self.decoder = None
def getstate(self):
# additonal state info from the base class must be None here,
# as it isn't passed along to the caller
state = codecs.BufferedIncrementalDecoder.getstate(self)[0]
# additional state info we pass to the caller:
# 0: stream is in natural order for this platform
# 1: stream is in unnatural order
# 2: endianness hasn't been determined yet
if self.decoder is None:
return (state, 2)
addstate = int((sys.byteorder == "big") !=
(self.decoder is codecs.utf_16_be_decode))
return (state, addstate)
def setstate(self, state):
# state[1] will be ignored by BufferedIncrementalDecoder.setstate()
codecs.BufferedIncrementalDecoder.setstate(self, state)
state = state[1]
if state == 0:
self.decoder = (codecs.utf_16_be_decode
if sys.byteorder == "big"
else codecs.utf_16_le_decode)
elif state == 1:
self.decoder = (codecs.utf_16_le_decode
if sys.byteorder == "big"
else codecs.utf_16_be_decode)
else:
self.decoder = None
class StreamWriter(codecs.StreamWriter):
def __init__(self, stream, errors='strict'):
codecs.StreamWriter.__init__(self, stream, errors)
self.encoder = None
def reset(self):
codecs.StreamWriter.reset(self)
self.encoder = None
def encode(self, input, errors='strict'):
if self.encoder is None:
result = codecs.utf_16_encode(input, errors)
if sys.byteorder == 'little':
self.encoder = codecs.utf_16_le_encode
else:
self.encoder = codecs.utf_16_be_encode
return result
else:
return self.encoder(input, errors)
class StreamReader(codecs.StreamReader):
def reset(self):
codecs.StreamReader.reset(self)
try:
del self.decode
except AttributeError:
pass
def decode(self, input, errors='strict'):
(object, consumed, byteorder) = \
codecs.utf_16_ex_decode(input, errors, 0, False)
if byteorder == -1:
self.decode = codecs.utf_16_le_decode
elif byteorder == 1:
self.decode = codecs.utf_16_be_decode
elif consumed>=2:
raise UnicodeError("UTF-16 stream does not start with BOM")
return (object, consumed)
### encodings module API
def getregentry():
return codecs.CodecInfo(
name='utf-16',
encode=encode,
decode=decode,
incrementalencoder=IncrementalEncoder,
incrementaldecoder=IncrementalDecoder,
streamreader=StreamReader,
streamwriter=StreamWriter,
)
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