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Written by Marc-Andre Lemburg (mal@lemburg.com).
(c) Copyright CNRI, All Rights Reserved. NO WARRANTY.
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rA r c �, � \ rS rSrSrSS jrSS jrSrg)r �u a� Defines the interface for stateless encoders/decoders.
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next call to read().
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Error handling is done in the same way as defined for the
StreamWriter/Readers.
N)r� �reader�writerrY )r> r� �Reader�WriterrY s r? re �StreamReaderWriter.__init__� s& � � � � �V�,�� � �V�,�� � � rA c �8 � U R R U5 $ r5 )r/ r� )r> r� s r? r� �StreamReaderWriter.read� s � ��{�{� � ��%�%rA Nc �8 � U R R X5 $ r5 )r/ r )r> r� r� s r? r �StreamReaderWriter.readline� s � ��{�{�#�#�D�3�3rA c �8 � U R R X5 $ r5 )r/ r )r> r r� s r? r � StreamReaderWriter.readlines� s � ��{�{�$�$�X�8�8rA c �, � [ U R 5 $ r )�nextr/ rG s r? r �StreamReaderWriter.__next__� s � � �D�K�K� � rA c � � U $ r5 rQ rG s r? r! �StreamReaderWriter.__iter__� r� rA c �8 � U R R U5 $ r5 )r0 r� )r> r� s r? r� �StreamReaderWriter.write� s � ��{�{� � ��&�&rA c �8 � U R R U5 $ r5 )r0 r� r� s r? r� � StreamReaderWriter.writelines� s � ��{�{�%�%�d�+�+rA c �l � U R R 5 U R R 5 g r5 �r/ rm r0 rG s r? rm �StreamReaderWriter.reset� �" � � � � ���� � � ���rA c � � U R R X5 U R R 5 US:X a" US:X a U R R 5 g g g r� )r� r� r/ rm r0 r� s r? r� �StreamReaderWriter.seek� sH � � � � ����(� � � ���� �Q�;�6�Q�;� �K�K� � � � '�;rA c �( � U" U R U5 $ r� r� r� s r? r� � StreamReaderWriter.__getattr__� r� rA c � � U $ r5 rQ rG s r? r� � StreamReaderWriter.__enter__� r� rA c �8 � U R R 5 g r5 r� r� s r? r� �StreamReaderWriter.__exit__� r� rA c �F � [ SU R R - 5 er� r� r� s r? r� � StreamReaderWriter.__reduce_ex__� r� rA )rY r/ r� r0 r] �r r+ r� )rM rD rE rN rO �encodingre r� r r r r! r� r� rm r� r� r� r� r� r� rP rQ rA r? r r � sZ � �� �H� �$&�4�9�!�
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rSS jr\4S jrS rS rS rSrg)r i� a� StreamRecoder instances translate data from one encoding to another.
They use the complete set of APIs returned by the
codecs.lookup() function to implement their task.
Data written to the StreamRecoder is first decoded into an
intermediate format (depending on the "decode" codec) and then
written to the underlying stream using an instance of the provided
Writer class.
In the other direction, data is read from the underlying stream using
a Reader instance and then encoded and returned to the caller.
r- c �h � Xl X l X0l U" X5 U l U" X5 U l X`l g)a\ Creates a StreamRecoder instance which implements a two-way
conversion: encode and decode work on the frontend (the
data visible to .read() and .write()) while Reader and Writer
work on the backend (the data in stream).
You can use these objects to do transparent
transcodings from e.g. latin-1 to utf-8 and back.
stream must be a file-like object.
encode and decode must adhere to the Codec interface; Reader and
Writer must be factory functions or classes providing the
StreamReader and StreamWriter interfaces resp.
Error handling is done in the same way as defined for the
StreamWriter/Readers.
N)r� r$ r% r/ r0 rY )r> r� r$ r% r1 r2 rY s r? re �StreamRecoder.__init__ s0 � �* � � � � � � �V�,�� � �V�,�� � � rA c �v � U R R U5 nU R X R 5 u p#U$ r5 )r/ r� r$ rY �r> r� r� � bytesencodeds r? r� �StreamRecoder.read/ s0 � ��{�{� � ��%�� !�[�[��{�{� ;���� rA Nc � � Uc U R R 5 nOU R R U5 nU R X R 5 u p#U$ r5 )r/ r r$ rY rW s r? r �StreamRecoder.readline5 sG � � �<��;�;�'�'�)�D��;�;�'�'��-�D� !�[�[��{�{� ;���� rA c � � U R R 5 nU R X R 5 u p#UR SS9$ )NTr� )r/ r� r$ rY r� )r> r r� rX s r? r �StreamRecoder.readlines> s: � ��{�{� � �!�� !�[�[��{�{� ;��������-�-rA c �j � [ U R 5 nU R XR 5 u pU$ r )r; r/ r$ rY )r> r� rX s r? r �StreamRecoder.__next__D s, � � �D�K�K� �� !�[�[��{�{� ;���� rA c � � U $ r5 rQ rG s r? r! �StreamRecoder.__iter__K r� rA c �r � U R XR 5 u pU R R U5 $ r5 )r% rY r0 r� )r> r� � bytesdecodeds r? r� �StreamRecoder.writeN s, � � !�[�[��{�{� ;����{�{� � ��&�&rA c � � SR U5 nU R X R 5 u p#U R R U5 $ r� )r� r% rY r0 r� )r> r� r� rc s r? r� �StreamRecoder.writelinesS s9 � ��x�x��~�� !�[�[��{�{� ;����{�{� � ��&�&rA c �l � U R R 5 U R R 5 g r5 rD rG s r? rm �StreamRecoder.resetY rF rA c �p � U R R X5 U R R X5 g r5 )r/ r� r0 r� s r? r� �StreamRecoder.seek^ s( � �
� � ����(� � � ����(rA c �( � U" U R U5 $ r� r� r� s r? r� �StreamRecoder.__getattr__d r� rA c � � U $ r5 rQ rG s r? r� �StreamRecoder.__enter__k r� rA c �8 � U R R 5 g r5 r� r� s r? r� �StreamRecoder.__exit__n r� rA c �F � [ SU R R - 5 er� r� r� s r? r� �StreamRecoder.__reduce_ex__q r� rA )r% r$ rY r/ r� r0 r] rQ r5 r� )rM rD rE rN rO �
data_encoding�
file_encodingre r� r r r r! r� r� rm r� r� r� r� r� r� rP rQ rA r? r r � sd � �
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U5 nX'l U$ ! UR 5 e = f)a� Open an encoded file using the given mode and return
a wrapped version providing transparent encoding/decoding.
Note: The wrapped version will only accept the object format
defined by the codecs, i.e. Unicode objects for most builtin
codecs. Output is also codec dependent and will usually be
Unicode as well.
If encoding is not None, then the
underlying encoded files are always opened in binary mode.
The default file mode is 'r', meaning to open the file in read mode.
encoding specifies the encoding which is to be used for the
file.
errors may be given to define the error handling. It defaults
to 'strict' which causes ValueErrors to be raised in case an
encoding error occurs.
buffering has the same meaning as for the builtin open() API.
It defaults to -1 which means that the default buffer size will
be used.
The returned wrapped file object provides an extra attribute
.encoding which allows querying the used encoding. This
attribute is only available if an encoding was specified as
parameter.
�b)�builtinsr r r r< r; rR r� )�filename�moderR rY � buffering�file�info�srws r? r r v s{ � �> ��
�$���c�z�� �=�=��� 3�D���� ���h� �� ��'8�'8�$�:K�:K�V�T�� � ��
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�s �3A � A3c �� � Uc Un[ U5 n[ U5 n[ XR UR UR UR
U5 nXl X&l U$ )a] Return a wrapped version of file which provides transparent
encoding translation.
Data written to the wrapped file is decoded according
to the given data_encoding and then encoded to the underlying
file using file_encoding. The intermediate data type
will usually be Unicode but depends on the specified codecs.
Bytes read from the file are decoded using file_encoding and then
passed back to the caller encoded using data_encoding.
If file_encoding is not given, it defaults to data_encoding.
errors may be given to define the error handling. It defaults
to 'strict' which causes ValueErrors to be raised in case an
encoding error occurs.
The returned wrapped file object provides two extra attributes
.data_encoding and .file_encoding which reflect the given
parameters of the same name. The attributes can be used for
introspection by Python programs.
)r r r$ r% r< r; rs rt )r{ rs rt rY � data_info� file_info�srs r? r r � sd � �2 � �%�
��}�%�I��}�%�I� �t� -� -�y�/?�/?� �-�-�y�/E�/E�v�
O�B� %��$��
�IrA c �, � [ U 5 R $ )z�Lookup up the codec for the given encoding and return
its encoder function.
Raises a LookupError in case the encoding cannot be found.
)r r$ �rR s r? r r � � � � �(� � "� "�"rA c �, � [ U 5 R $ )z�Lookup up the codec for the given encoding and return
its decoder function.
Raises a LookupError in case the encoding cannot be found.
)r r% r� s r? r r � r� rA c �L � [ U 5 R nUc [ U 5 eU$ )z�Lookup up the codec for the given encoding and return
its IncrementalEncoder class or factory function.
Raises a LookupError in case the encoding cannot be found
or the codecs doesn't provide an incremental encoder.
)r r9 � LookupError)rR �encoders r? r r � �) � � �X� �1�1�G����(�#�#� �NrA c �L � [ U 5 R nUc [ U 5 eU$ )z�Lookup up the codec for the given encoding and return
its IncrementalDecoder class or factory function.
Raises a LookupError in case the encoding cannot be found
or the codecs doesn't provide an incremental decoder.
)r r: r� )rR �decoders r? r! r! � r� rA c �, � [ U 5 R $ )z�Lookup up the codec for the given encoding and return
its StreamReader class or factory function.
Raises a LookupError in case the encoding cannot be found.
)r r< r� s r? r" r" � � � � �(� � (� (�(rA c �, � [ U 5 R $ )z�Lookup up the codec for the given encoding and return
its StreamWriter class or factory function.
Raises a LookupError in case the encoding cannot be found.
)r r; r� s r? r# r# r� rA c + � # � [ U5 " U40 UD6nU H! nUR U5 nU( d M Uv � M# UR SS5 nU( a Uv � gg7f)z�
Encoding iterator.
Encodes the input strings from the iterator using an IncrementalEncoder.
errors and kwargs are passed through to the IncrementalEncoder
constructor.
rb TN)r r$ )�iteratorrR rY �kwargsr� rX �outputs r? r& r& s\ � � � $�H�-�f�?��?�G���� � ��&�� �6��L� � �^�^�B��
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�.A�'Ac + � # � [ U5 " U40 UD6nU H! nUR U5 nU( d M Uv � M# UR SS5 nU( a Uv � gg7f)z�
Decoding iterator.
Decodes the input strings from the iterator using an IncrementalDecoder.
errors and kwargs are passed through to the IncrementalDecoder
constructor.
rA TN)r! r% )r� rR rY r� r� rX r� s r? r' r' # s\ � � � $�H�-�f�?��?�G���� � ��&�� �6��L� � �^�^�C��
&�F�
�� � �r� c �2 � U Vs0 s H oU_M sn$ s snf )zsmake_identity_dict(rng) -> dict
Return a dictionary where elements of the rng sequence are
mapped to themselves.
rQ )�rng�is r? �make_identity_dictr� 7 s � � � ��A�a�C�� � �� s � c �Z � 0 nU R 5 H u p#X1; a X!U' M SX' M U$ )aM Creates an encoding map from a decoding map.
If a target mapping in the decoding map occurs multiple
times, then that target is mapped to None (undefined mapping),
causing an exception when encountered by the charmap codec
during translation.
One example where this happens is cp875.py which decodes
multiple character to \u001a.
N)�items)� decoding_map�m�k�vs r? �make_encoding_mapr� A s8 � � �A��!�!�#����v��a�D��A�D� $�
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