bpo-29240: Fix locale encodings in UTF-8 Mode (#5170)

Modify locale.localeconv(), time.tzname, os.strerror() and other
functions to ignore the UTF-8 Mode: always use the current locale
encoding.

Changes:

* Add _Py_DecodeLocaleEx() and _Py_EncodeLocaleEx(). On decoding or
  encoding error, they return the position of the error and an error
  message which are used to raise Unicode errors in
  PyUnicode_DecodeLocale() and PyUnicode_EncodeLocale().
* Replace _Py_DecodeCurrentLocale() with _Py_DecodeLocaleEx().
* PyUnicode_DecodeLocale() now uses _Py_DecodeLocaleEx() for all
  cases, especially for the strict error handler.
* Add _Py_DecodeUTF8Ex(): return more information on decoding error
  and supports the strict error handler.
* Rename _Py_EncodeUTF8_surrogateescape() to _Py_EncodeUTF8Ex().
* Replace _Py_EncodeCurrentLocale() with _Py_EncodeLocaleEx().
* Ignore the UTF-8 mode to encode/decode localeconv(), strerror()
  and time zone name.
* Remove PyUnicode_DecodeLocale(), PyUnicode_DecodeLocaleAndSize()
  and PyUnicode_EncodeLocale() now ignore the UTF-8 mode: always use
  the "current" locale.
* Remove _PyUnicode_DecodeCurrentLocale(),
  _PyUnicode_DecodeCurrentLocaleAndSize() and
  _PyUnicode_EncodeCurrentLocale().

1 files changed, 0 insertions, 14 deletions

diff --git a/Include/unicodeobject.h b/Include/unicodeobject.h
index d263026..0274de6 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -1810,20 +1810,6 @@ PyAPI_FUNC(PyObject*) PyUnicode_EncodeLocale(
     PyObject *unicode,
     const char *errors
     );
-
-PyAPI_FUNC(PyObject*) _PyUnicode_DecodeCurrentLocale(
-    const char *str,
-    const char *errors);
-
-PyAPI_FUNC(PyObject*) _PyUnicode_DecodeCurrentLocaleAndSize(
-    const char *str,
-    Py_ssize_t len,
-    const char *errors);
-
-PyAPI_FUNC(PyObject*) _PyUnicode_EncodeCurrentLocale(
-    PyObject *unicode,
-    const char *errors
-    );
 #endif
 
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