mirror of
https://github.com/python/cpython.git
synced 2024-11-28 16:45:42 +01:00
124 lines
4.7 KiB
ReStructuredText
124 lines
4.7 KiB
ReStructuredText
.. _codec-registry:
|
|
|
|
Codec registry and support functions
|
|
====================================
|
|
|
|
.. c:function:: int PyCodec_Register(PyObject *search_function)
|
|
|
|
Register a new codec search function.
|
|
|
|
As side effect, this tries to load the :mod:`encodings` package, if not yet
|
|
done, to make sure that it is always first in the list of search functions.
|
|
|
|
.. c:function:: int PyCodec_KnownEncoding(const char *encoding)
|
|
|
|
Return ``1`` or ``0`` depending on whether there is a registered codec for
|
|
the given *encoding*. This function always succeeds.
|
|
|
|
.. c:function:: PyObject* PyCodec_Encode(PyObject *object, const char *encoding, const char *errors)
|
|
|
|
Generic codec based encoding API.
|
|
|
|
*object* is passed through the encoder function found for the given
|
|
*encoding* using the error handling method defined by *errors*. *errors* may
|
|
be *NULL* to use the default method defined for the codec. Raises a
|
|
:exc:`LookupError` if no encoder can be found.
|
|
|
|
.. c:function:: PyObject* PyCodec_Decode(PyObject *object, const char *encoding, const char *errors)
|
|
|
|
Generic codec based decoding API.
|
|
|
|
*object* is passed through the decoder function found for the given
|
|
*encoding* using the error handling method defined by *errors*. *errors* may
|
|
be *NULL* to use the default method defined for the codec. Raises a
|
|
:exc:`LookupError` if no encoder can be found.
|
|
|
|
|
|
Codec lookup API
|
|
----------------
|
|
|
|
In the following functions, the *encoding* string is looked up converted to all
|
|
lower-case characters, which makes encodings looked up through this mechanism
|
|
effectively case-insensitive. If no codec is found, a :exc:`KeyError` is set
|
|
and *NULL* returned.
|
|
|
|
.. c:function:: PyObject* PyCodec_Encoder(const char *encoding)
|
|
|
|
Get an encoder function for the given *encoding*.
|
|
|
|
.. c:function:: PyObject* PyCodec_Decoder(const char *encoding)
|
|
|
|
Get a decoder function for the given *encoding*.
|
|
|
|
.. c:function:: PyObject* PyCodec_IncrementalEncoder(const char *encoding, const char *errors)
|
|
|
|
Get an :class:`~codecs.IncrementalEncoder` object for the given *encoding*.
|
|
|
|
.. c:function:: PyObject* PyCodec_IncrementalDecoder(const char *encoding, const char *errors)
|
|
|
|
Get an :class:`~codecs.IncrementalDecoder` object for the given *encoding*.
|
|
|
|
.. c:function:: PyObject* PyCodec_StreamReader(const char *encoding, PyObject *stream, const char *errors)
|
|
|
|
Get a :class:`~codecs.StreamReader` factory function for the given *encoding*.
|
|
|
|
.. c:function:: PyObject* PyCodec_StreamWriter(const char *encoding, PyObject *stream, const char *errors)
|
|
|
|
Get a :class:`~codecs.StreamWriter` factory function for the given *encoding*.
|
|
|
|
|
|
Registry API for Unicode encoding error handlers
|
|
------------------------------------------------
|
|
|
|
.. c:function:: int PyCodec_RegisterError(const char *name, PyObject *error)
|
|
|
|
Register the error handling callback function *error* under the given *name*.
|
|
This callback function will be called by a codec when it encounters
|
|
unencodable characters/undecodable bytes and *name* is specified as the error
|
|
parameter in the call to the encode/decode function.
|
|
|
|
The callback gets a single argument, an instance of
|
|
:exc:`UnicodeEncodeError`, :exc:`UnicodeDecodeError` or
|
|
:exc:`UnicodeTranslateError` that holds information about the problematic
|
|
sequence of characters or bytes and their offset in the original string (see
|
|
:ref:`unicodeexceptions` for functions to extract this information). The
|
|
callback must either raise the given exception, or return a two-item tuple
|
|
containing the replacement for the problematic sequence, and an integer
|
|
giving the offset in the original string at which encoding/decoding should be
|
|
resumed.
|
|
|
|
Return ``0`` on success, ``-1`` on error.
|
|
|
|
.. c:function:: PyObject* PyCodec_LookupError(const char *name)
|
|
|
|
Lookup the error handling callback function registered under *name*. As a
|
|
special case *NULL* can be passed, in which case the error handling callback
|
|
for "strict" will be returned.
|
|
|
|
.. c:function:: PyObject* PyCodec_StrictErrors(PyObject *exc)
|
|
|
|
Raise *exc* as an exception.
|
|
|
|
.. c:function:: PyObject* PyCodec_IgnoreErrors(PyObject *exc)
|
|
|
|
Ignore the unicode error, skipping the faulty input.
|
|
|
|
.. c:function:: PyObject* PyCodec_ReplaceErrors(PyObject *exc)
|
|
|
|
Replace the unicode encode error with ``?`` or ``U+FFFD``.
|
|
|
|
.. c:function:: PyObject* PyCodec_XMLCharRefReplaceErrors(PyObject *exc)
|
|
|
|
Replace the unicode encode error with XML character references.
|
|
|
|
.. c:function:: PyObject* PyCodec_BackslashReplaceErrors(PyObject *exc)
|
|
|
|
Replace the unicode encode error with backslash escapes (``\x``, ``\u`` and
|
|
``\U``).
|
|
|
|
.. c:function:: PyObject* PyCodec_NameReplaceErrors(PyObject *exc)
|
|
|
|
Replace the unicode encode error with ``\N{...}`` escapes.
|
|
|
|
.. versionadded:: 3.5
|