# Codec registry and support functions

int PyCodec_Register(PyObject *search_function)
  Fait partie de l' ABI stable.

  Register a new codec search function.

  As a side effect, this tries to load the `encodings` package, if not yet done, to make sure that it is always first in the list of search functions.

int PyCodec_Unregister(PyObject *search_function)
  Fait partie de l' ABI stable depuis la version 3.10.

  Unregister a codec search function and clear the registry's cache. If the search function is not registered, do nothing. Return 0 on success. Raise an exception and return -1 on error.

  Ajouté dans la version 3.10.

int PyCodec_KnownEncoding(const char *encoding)
  Fait partie de l' ABI stable.

  Return `1` or `0` depending on whether there is a registered codec for the given encoding. This function always succeeds.

PyObject *PyCodec_Encode(PyObject *object, const char *encoding, const char *errors)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  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 `LookupError` if no encoder can be found.

PyObject *PyCodec_Decode(PyObject *object, const char *encoding, const char *errors)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  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 `LookupError` if no decoder 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 `KeyError` is set and `NULL` returned.

PyObject *PyCodec_Encoder(const char *encoding)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Get an encoder function for the given encoding.

PyObject *PyCodec_Decoder(const char *encoding)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Get a decoder function for the given encoding.

PyObject *PyCodec_IncrementalEncoder(const char *encoding, const char *errors)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Get an `IncrementalEncoder` object for the given encoding.

PyObject *PyCodec_IncrementalDecoder(const char *encoding, const char *errors)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Get an `IncrementalDecoder` object for the given encoding.

PyObject *PyCodec_StreamReader(const char *encoding, PyObject *stream, const char *errors)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Get a `StreamReader` factory function for the given encoding.

PyObject *PyCodec_StreamWriter(const char *encoding, PyObject *stream, const char *errors)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Get a `StreamWriter` factory function for the given encoding.

## Registry API for Unicode encoding error handlers

int PyCodec_RegisterError(const char *name, PyObject *error)
  Fait partie de l' ABI stable.

  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 `UnicodeEncodeError`, `UnicodeDecodeError` or `UnicodeTranslateError` that holds information about the problematic sequence of characters or bytes and their offset in the original string (see Objets exception Unicode 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.

PyObject *PyCodec_LookupError(const char *name)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  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.

PyObject *PyCodec_StrictErrors(PyObject *exc)
  Valeur de retour : toujours NULL. Fait partie de l' ABI stable.

  Raise exc as an exception.

PyObject *PyCodec_IgnoreErrors(PyObject *exc)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Ignore the unicode error, skipping the faulty input.

PyObject *PyCodec_ReplaceErrors(PyObject *exc)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Replace the unicode encode error with `?` or `U+FFFD`.

PyObject *PyCodec_XMLCharRefReplaceErrors(PyObject *exc)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Replace the unicode encode error with XML character references.

PyObject *PyCodec_BackslashReplaceErrors(PyObject *exc)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable.

  Replace the unicode encode error with backslash escapes (`\x`, `\u` and `\U`).

PyObject *PyCodec_NameReplaceErrors(PyObject *exc)
  Valeur de retour : nouvelle référence. Fait partie de l' ABI stable depuis la version 3.7.

  Replace the unicode encode error with `\N{...}` escapes.

  Ajouté dans la version 3.5.

## Codec utility variables

const char *Py_hexdigits

  A string constant containing the lowercase hexadecimal digits: `"0123456789abcdef"`.

  Ajouté dans la version 3.3.