bpo-42658: Use LCMapStringEx in ntpath.normcase to match OS behaviour for case-folding (GH-32010)

1 files changed, 38 insertions, 1 deletions

diff --git a/Modules/clinic/_winapi.c.h b/Modules/clinic/_winapi.c.h
index 4d89888..486029a 100644
--- a/Modules/clinic/_winapi.c.h
+++ b/Modules/clinic/_winapi.c.h
@@ -820,6 +820,43 @@ exit:
     return return_value;
 }
 
+PyDoc_STRVAR(_winapi_LCMapStringEx__doc__,
+"LCMapStringEx($module, /, locale, flags, src)\n"
+"--\n"
+"\n");
+
+#define _WINAPI_LCMAPSTRINGEX_METHODDEF    \
+    {"LCMapStringEx", _PyCFunction_CAST(_winapi_LCMapStringEx), METH_FASTCALL|METH_KEYWORDS, _winapi_LCMapStringEx__doc__},
+
+static PyObject *
+_winapi_LCMapStringEx_impl(PyObject *module, LPCWSTR locale, DWORD flags,
+                           LPCWSTR src);
+
+static PyObject *
+_winapi_LCMapStringEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = {"locale", "flags", "src", NULL};
+    static _PyArg_Parser _parser = {"O&kO&:LCMapStringEx", _keywords, 0};
+    LPCWSTR locale;
+    DWORD flags;
+    LPCWSTR src;
+
+    if (!_PyArg_ParseStackAndKeywords(args, nargs, kwnames, &_parser,
+        _PyUnicode_WideCharString_Converter, &locale, &flags, _PyUnicode_WideCharString_Converter, &src)) {
+        goto exit;
+    }
+    return_value = _winapi_LCMapStringEx_impl(module, locale, flags, src);
+
+exit:
+    /* Cleanup for locale */
+    PyMem_Free((void *)locale);
+    /* Cleanup for src */
+    PyMem_Free((void *)src);
+
+    return return_value;
+}
+
 PyDoc_STRVAR(_winapi_ReadFile__doc__,
 "ReadFile($module, /, handle, size, overlapped=False)\n"
 "--\n"
@@ -1164,4 +1201,4 @@ _winapi__mimetypes_read_windows_registry(PyObject *module, PyObject *const *args
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=b007dde2e7f2fff8 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=6cdefec63a1d7f12 input=a9049054013a1b77]*/