bpo-46362: Ensure ntpath.abspath() uses the Windows API correctly (GH-30571)

This makes ntpath.abspath()/getpath_abspath() follow normpath(), since some WinAPIs such as PathCchSkipRoot() require backslashed paths.

1 files changed, 1 insertions, 36 deletions

diff --git a/Python/fileutils.c b/Python/fileutils.c
index 151c6fe..9a71b83 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -2049,42 +2049,7 @@ _Py_abspath(const wchar_t *path, wchar_t **abspath_p)
     }
 
 #ifdef MS_WINDOWS
-    wchar_t woutbuf[MAX_PATH], *woutbufp = woutbuf;
-    DWORD result;
-
-    result = GetFullPathNameW(path,
-                              Py_ARRAY_LENGTH(woutbuf), woutbuf,
-                              NULL);
-    if (!result) {
-        return -1;
-    }
-
-    if (result >= Py_ARRAY_LENGTH(woutbuf)) {
-        if ((size_t)result <= (size_t)PY_SSIZE_T_MAX / sizeof(wchar_t)) {
-            woutbufp = PyMem_RawMalloc((size_t)result * sizeof(wchar_t));
-        }
-        else {
-            woutbufp = NULL;
-        }
-        if (!woutbufp) {
-            *abspath_p = NULL;
-            return 0;
-        }
-
-        result = GetFullPathNameW(path, result, woutbufp, NULL);
-        if (!result) {
-            PyMem_RawFree(woutbufp);
-            return -1;
-        }
-    }
-
-    if (woutbufp != woutbuf) {
-        *abspath_p = woutbufp;
-        return 0;
-    }
-
-    *abspath_p = _PyMem_RawWcsdup(woutbufp);
-    return 0;
+    return _PyOS_getfullpathname(path, abspath_p);
 #else
     wchar_t cwd[MAXPATHLEN + 1];
     cwd[Py_ARRAY_LENGTH(cwd) - 1] = 0;