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63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
""" Python 'utf-16' Codec
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Written by Marc-Andre Lemburg (mal@lemburg.com).
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(c) Copyright CNRI, All Rights Reserved. NO WARRANTY.
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"""
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import codecs, sys
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### Codec APIs
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class Codec(codecs.Codec):
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# Note: Binding these as C functions will result in the class not
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# converting them to methods. This is intended.
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encode = codecs.utf_16_encode
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decode = codecs.utf_16_decode
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class StreamWriter(Codec,codecs.StreamWriter):
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def __init__(self, stream, errors='strict'):
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self.bom_written = 0
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codecs.StreamWriter.__init__(self, stream, errors)
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def write(self, data):
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result = codecs.StreamWriter.write(self, data)
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if not self.bom_written:
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self.bom_written = 1
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if sys.byteorder == 'little':
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self.encode = codecs.utf_16_le_encode
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else:
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self.encode = codecs.utf_16_be_encode
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return result
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class StreamReader(Codec,codecs.StreamReader):
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def __init__(self, stream, errors='strict'):
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self.bom_read = 0
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codecs.StreamReader.__init__(self, stream, errors)
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def read(self, size=-1):
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if not self.bom_read:
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signature = self.stream.read(2)
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if signature == codecs.BOM_BE:
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self.decode = codecs.utf_16_be_decode
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elif signature == codecs.BOM_LE:
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self.decode = codecs.utf_16_le_decode
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else:
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raise UnicodeError,"UTF-16 stream does not start with BOM"
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if size > 2:
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size -= 2
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elif size >= 0:
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size = 0
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self.bom_read = 1
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return codecs.StreamReader.read(self, size)
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def readline(self, size=None):
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raise NotImplementedError, '.readline() is not implemented for UTF-16'
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### encodings module API
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def getregentry():
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return (Codec.encode,Codec.decode,StreamReader,StreamWriter)
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