bpo-36775: _PyCoreConfig only uses wchar_t* (GH-13062)

_PyCoreConfig: Change filesystem_encoding, filesystem_errors,
stdio_encoding and stdio_errors fields type from char* to wchar_t*.

Changes:

* PyInterpreterState: replace fscodec_initialized (int) with fs_codec
  structure.
* Add get_error_handler_wide() and unicode_encode_utf8() helper
  functions.
* Add error_handler parameter to unicode_encode_locale()
  and unicode_decode_locale().
* Remove _PyCoreConfig_SetString().
* Rename _PyCoreConfig_SetWideString() to _PyCoreConfig_SetString().
* Rename _PyCoreConfig_SetWideStringFromString()
  to _PyCoreConfig_DecodeLocale().

1 files changed, 4 insertions, 4 deletions

diff --git a/Include/cpython/coreconfig.h b/Include/cpython/coreconfig.h
index 1aab5e4..5672080 100644
--- a/Include/cpython/coreconfig.h
+++ b/Include/cpython/coreconfig.h
@@ -207,8 +207,8 @@ typedef struct {
 
        See Py_FileSystemDefaultEncoding and Py_FileSystemDefaultEncodeErrors.
        */
-    char *filesystem_encoding;
-    char *filesystem_errors;
+    wchar_t *filesystem_encoding;
+    wchar_t *filesystem_errors;
 
     wchar_t *pycache_prefix;  /* PYTHONPYCACHEPREFIX, -X pycache_prefix=PATH */
     wchar_t *program_name;    /* Program name, see also Py_GetProgramName() */
@@ -334,13 +334,13 @@ typedef struct {
        Value set from PYTHONIOENCODING environment variable and
        Py_SetStandardStreamEncoding() function.
        See also 'stdio_errors' attribute. */
-    char *stdio_encoding;
+    wchar_t *stdio_encoding;
 
     /* Error handler of sys.stdin and sys.stdout.
        Value set from PYTHONIOENCODING environment variable and
        Py_SetStandardStreamEncoding() function.
        See also 'stdio_encoding' attribute. */
-    char *stdio_errors;
+    wchar_t *stdio_errors;
 
 #ifdef MS_WINDOWS
     /* If greater than zero, use io.FileIO instead of WindowsConsoleIO for sys