Issue #13560: Locale codec functions use the classic "errors" parameter,

instead of surrogateescape

So it would be possible to support more error handlers later.

Include/unicodeobject.h

@@ -1608,14 +1608,14 @@ PyAPI_FUNC(PyObject*) _PyUnicode_TransformDecimalAndSpaceToASCII(
 PyAPI_FUNC(PyObject*) PyUnicode_DecodeLocaleAndSize(
     const char *str,
     Py_ssize_t len,
-    int surrogateescape);
+    const char *errors);
 
 /* Similar to PyUnicode_DecodeLocaleAndSize(), but compute the string
    length using strlen(). */
 
 PyAPI_FUNC(PyObject*) PyUnicode_DecodeLocale(
     const char *str,
-    int surrogateescape);
+    const char *errors);
 
 /* Encode a Unicode object to the current locale encoding. The encoder is
    strict is *surrogateescape* is equal to zero, otherwise the
@@ -1624,7 +1624,7 @@ PyAPI_FUNC(PyObject*) PyUnicode_DecodeLocale(
 
 PyAPI_FUNC(PyObject*) PyUnicode_EncodeLocale(
     PyObject *unicode,
-    int surrogateescape
+    const char *errors
     );
 
 /* --- File system encoding ---------------------------------------------- */

Modules/main.c

@@ -495,7 +495,7 @@ Py_Main(int argc, wchar_t **argv)
             /* Use utf-8 on Mac OS X */
             unicode = PyUnicode_FromString(p);
 #else
-            unicode = PyUnicode_DecodeLocale(p, 1);
+            unicode = PyUnicode_DecodeLocale(p, "surrogateescape");
 #endif
             if (unicode == NULL) {
                 /* ignore errors */

Modules/posixmodule.c

@@ -7891,7 +7891,7 @@ posix_strerror(PyObject *self, PyObject *args)
                         "strerror() argument out of range");
         return NULL;
     }
-    return PyUnicode_DecodeLocale(message, 1);
+    return PyUnicode_DecodeLocale(message, "surrogateescape");
 }
 
 

Modules/timemodule.c

@@ -486,7 +486,7 @@ time_strftime(PyObject *self, PyObject *args)
     fmt = format;
 #else
     /* Convert the unicode string to an ascii one */
-    format = PyUnicode_EncodeLocale(format_arg, 1);
+    format = PyUnicode_EncodeLocale(format_arg, "surrogateescape");
     if (format == NULL)
         return NULL;
     fmt = PyBytes_AS_STRING(format);
@@ -532,7 +532,8 @@ time_strftime(PyObject *self, PyObject *args)
 #ifdef HAVE_WCSFTIME
             ret = PyUnicode_FromWideChar(outbuf, buflen);
 #else
-            ret = PyUnicode_DecodeLocaleAndSize(outbuf, buflen, 1);
+            ret = PyUnicode_DecodeLocaleAndSize(outbuf, buflen,
+                                                "surrogateescape");
 #endif
             PyMem_Free(outbuf);
             break;
@@ -764,8 +765,8 @@ PyInit_timezone(PyObject *m) {
 #endif /* PYOS_OS2 */
 #endif
     PyModule_AddIntConstant(m, "daylight", daylight);
-    otz0 = PyUnicode_DecodeLocale(tzname[0], 1);
-    otz1 = PyUnicode_DecodeLocale(tzname[1], 1);
+    otz0 = PyUnicode_DecodeLocale(tzname[0], "surrogateescape");
+    otz1 = PyUnicode_DecodeLocale(tzname[1], "surrogateescape");
     PyModule_AddObject(m, "tzname", Py_BuildValue("(NN)", otz0, otz1));
 #else /* !HAVE_TZNAME || __GLIBC__ || __CYGWIN__*/
 #ifdef HAVE_STRUCT_TM_TM_ZONE

Objects/unicodeobject.c

@@ -3125,8 +3125,31 @@ wcstombs_errorpos(const wchar_t *wstr)
     return 0;
 }
 
+static int
+locale_error_handler(const char *errors, int *surrogateescape)
+{
+    if (errors == NULL) {
+        *surrogateescape = 0;
+        return 0;
+    }
+
+    if (strcmp(errors, "strict") == 0) {
+        *surrogateescape = 0;
+        return 0;
+    }
+    if (strcmp(errors, "surrogateescape") == 0) {
+        *surrogateescape = 1;
+        return 0;
+    }
+    PyErr_Format(PyExc_ValueError,
+                 "only 'strict' and 'surrogateescape' error handlers "
+                 "are supported, not '%s'",
+                 errors);
+    return -1;
+}
+
 PyObject *
-PyUnicode_EncodeLocale(PyObject *unicode, int surrogateescape)
+PyUnicode_EncodeLocale(PyObject *unicode, const char *errors)
 {
     Py_ssize_t wlen, wlen2;
     wchar_t *wstr;
@@ -3135,6 +3158,10 @@ PyUnicode_EncodeLocale(PyObject *unicode, int surrogateescape)
     PyObject *reason;
     PyObject *exc;
     size_t error_pos;
+    int surrogateescape;
+
+    if (locale_error_handler(errors, &surrogateescape) < 0)
+        return NULL;
 
     wstr = PyUnicode_AsWideCharString(unicode, &wlen);
     if (wstr == NULL)
@@ -3198,7 +3225,7 @@ encode_error:
     Py_XDECREF(bytes);
 
     if (errmsg != NULL)
-        reason = PyUnicode_DecodeLocale(errmsg, 1);
+        reason = PyUnicode_DecodeLocale(errmsg, "surrogateescape");
     else
         reason = PyUnicode_FromString(
             "wcstombs() encountered an unencodable "
@@ -3243,7 +3270,7 @@ PyUnicode_EncodeFSDefault(PyObject *unicode)
                                          "surrogateescape");
     }
     else {
-        return PyUnicode_EncodeLocale(unicode, 1);
+        return PyUnicode_EncodeLocale(unicode, "surrogateescape");
     }
 #endif
 }
@@ -3351,13 +3378,17 @@ PyUnicode_AsEncodedUnicode(PyObject *unicode,
 
 PyObject*
 PyUnicode_DecodeLocaleAndSize(const char *str, Py_ssize_t len,
-                              int surrogateescape)
+                              const char *errors)
 {
     wchar_t smallbuf[256];
     size_t smallbuf_len = Py_ARRAY_LENGTH(smallbuf);
     wchar_t *wstr;
     size_t wlen, wlen2;
     PyObject *unicode;
+    int surrogateescape;
+
+    if (locale_error_handler(errors, &surrogateescape) < 0)
+        return NULL;
 
     if (str[len] != '\0' || len != strlen(str)) {
         PyErr_SetString(PyExc_TypeError, "embedded null character");
@@ -3419,10 +3450,10 @@ PyUnicode_DecodeLocaleAndSize(const char *str, Py_ssize_t len,
 }
 
 PyObject*
-PyUnicode_DecodeLocale(const char *str, int surrogateescape)
+PyUnicode_DecodeLocale(const char *str, const char *errors)
 {
     Py_ssize_t size = (Py_ssize_t)strlen(str);
-    return PyUnicode_DecodeLocaleAndSize(str, size, surrogateescape);
+    return PyUnicode_DecodeLocaleAndSize(str, size, errors);
 }
 
 
@@ -3456,7 +3487,7 @@ PyUnicode_DecodeFSDefaultAndSize(const char *s, Py_ssize_t size)
                                 "surrogateescape");
     }
     else {
-        return PyUnicode_DecodeLocaleAndSize(s, size, 1);
+        return PyUnicode_DecodeLocaleAndSize(s, size, "surrogateescape");
     }
 #endif
 }

Python/errors.c

@@ -355,7 +355,7 @@ PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)
 #ifndef MS_WINDOWS
     if (i != 0) {
         char *s = strerror(i);
-        message = PyUnicode_DecodeLocale(s, 1);
+        message = PyUnicode_DecodeLocale(s, "surrogateescape");
     }
     else {
         /* Sometimes errno didn't get set */