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webencodings
~~~~~~~~~~~~
This is a Python implementation of the `WHATWG Encoding standard
`. See README for details.
:copyright: Copyright 2012 by Simon Sapin
:license: BSD, see LICENSE for details.
)unicode_literalsN )LABELSz0.5.1z
iso-8859-8z mac-cyrillicz mac-romancp874)z iso-8859-8-izx-mac-cyrillic macintoshz windows-874c ^ | j d j j d S )a9 Transform (only) ASCII letters to lower case: A-Z is mapped to a-z.
:param string: An Unicode string.
:returns: A new Unicode string.
This is used for `ASCII case-insensitive
`_
matching of encoding labels.
The same matching is also used, among other things,
for `CSS keywords `_.
This is different from the :meth:`~py:str.lower` method of Unicode strings
which also affect non-ASCII characters,
sometimes mapping them into the ASCII range:
>>> keyword = u'Bac\N{KELVIN SIGN}ground'
>>> assert keyword.lower() == u'background'
>>> assert ascii_lower(keyword) != keyword.lower()
>>> assert ascii_lower(keyword) == u'bac\N{KELVIN SIGN}ground'
utf8)encodelowerdecode)strings /builddir/build/BUILDROOT/alt-python312-pip-23.3.1-3.el8.x86_64/opt/alt/python312/lib/python3.12/site-packages/pip/_vendor/webencodings/__init__.py ascii_lowerr # s' . == & & ( / / 77 c 0 t | j d } t j | }|yt j | }|L|dk( rddlm} n+t j || }t j | }t || }|t |< |S )u<
Look for an encoding by its label.
This is the spec’s `get an encoding
`_ algorithm.
Supported labels are listed there.
:param label: A string.
:returns:
An :class:`Encoding` object, or :obj:`None` for an unknown label.
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Accept either an encoding object or label.
:param encoding: An :class:`Encoding` object or a label string.
:returns: An :class:`Encoding` object.
:raises: :exc:`~exceptions.LookupError` for an unknown label.
r zUnknown encoding label: %r)hasattrr LookupError)encoding_or_labelr s r
_get_encodingr# [ s= ,/ '(H69JJKK Or c e Zd ZdZd Zd Zy)r aO Reresents a character encoding such as UTF-8,
that can be used for decoding or encoding.
.. attribute:: name
Canonical name of the encoding
.. attribute:: codec_info
The actual implementation of the encoding,
a stdlib :class:`~codecs.CodecInfo` object.
See :func:`codecs.register`.
c || _ || _ y N)r r )selfr r s r __init__zEncoding.__init__| s $r c d| j z S )Nz
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Decode a single string.
:param input: A byte string
:param fallback_encoding:
An :class:`Encoding` object or a label string.
The encoding to use if :obj:`input` does note have a BOM.
:param errors: Type of error handling. See :func:`codecs.register`.
:raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
:return:
A ``(output, encoding)`` tuple of an Unicode string
and an :obj:`Encoding`.
r )r# _detect_bomr r )inputfallback_encodingerrors bom_encodingr s r r r sM &&78%e,L%0 0H % %eV 4Q 7 AAr c | j d r t | dd fS | j d r t | dd fS | j d r t | dd fS d| fS )zBReturn (bom_encoding, input), with any BOM removed from the input.s Ns s )
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Encode a single string.
:param input: An Unicode string.
:param encoding: An :class:`Encoding` object or a label string.
:param errors: Type of error handling. See :func:`codecs.register`.
:raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
:return: A byte string.
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"Pull"-based decoder.
:param input:
An iterable of byte strings.
The input is first consumed just enough to determine the encoding
based on the precense of a BOM,
then consumed on demand when the return value is.
:param fallback_encoding:
An :class:`Encoding` object or a label string.
The encoding to use if :obj:`input` does note have a BOM.
:param errors: Type of error handling. See :func:`codecs.register`.
:raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
:returns:
An ``(output, encoding)`` tuple.
:obj:`output` is an iterable of Unicode strings,
:obj:`encoding` is the :obj:`Encoding` that is being used.
)IncrementalDecoder_iter_decode_generatornext)r2 r3 r4 decoder generatorr s r iter_decoderE s1 , !!2F;G&ug6IIH h r c # H K |j }t | } | D ]. } || }|s|j J |j | n. |dd }|j J |j |r| y| D ] } || }|s| |dd }|r| yyw)zqReturn a generator that first yields the :obj:`Encoding`,
then yields output chukns as Unicode strings.
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“Pull”-based encoder.
:param input: An iterable of Unicode strings.
:param encoding: An :class:`Encoding` object or a label string.
:param errors: Type of error handling. See :func:`codecs.register`.
:raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
:returns: An iterable of byte strings.
)IncrementalEncoderr
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“Push”-based decoder.
:param fallback_encoding:
An :class:`Encoding` object or a label string.
The encoding to use if :obj:`input` does note have a BOM.
:param errors: Type of error handling. See :func:`codecs.register`.
:raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
c \ t | | _ || _ d| _ d | _ d | _ y )Nr )r# _fallback_encoding_errors_buffer_decoderr )r' r3 r4 s r r( zIncrementalDecoder.__init__ s. "/0A"B
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| j j }|| _ || _ ||| S )zDecode one chunk of the input.
:param input: A byte string.
:param final:
Indicate that no more input is available.
Must be :obj:`True` if this is the last call.
:returns: An Unicode string.
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“Push”-based encoder.
:param encoding: An :class:`Encoding` object or a label string.
:param errors: Type of error handling. See :func:`codecs.register`.
:raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
.. method:: encode(input, final=False)
:param input: An Unicode string.
:param final:
Indicate that no more input is available.
Must be :obj:`True` if this is the last call.
:returns: A byte string.
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