merge posix and windows implementations

Author: berkerpeksag

Modules/posixmodule.c

@@ -7414,28 +7414,41 @@ If dir_fd is not None, it should be a file descriptor open to a directory,\n\
   and path should be relative; path will then be relative to that directory.\n\
 dir_fd may not be implemented on your platform.\n\
   If it is unavailable, using it will raise a NotImplementedError.");
-#endif
-
-#ifdef HAVE_READLINK
 
-/* AC 3.5: merge win32 and not together */
 static PyObject *
 posix_readlink(PyObject *self, PyObject *args, PyObject *kwargs)
 {
     path_t path;
+#if defined(HAVE_READLINK)
     int dir_fd = DEFAULT_DIR_FD;
     char buffer[MAXPATHLEN+1];
     ssize_t length;
+#elif defined(MS_WINDOWS)
+    int dir_fd;
+    DWORD n_bytes_returned;
+    DWORD io_result;
+    HANDLE reparse_point_handle;
+
+    char target_buffer[_Py_MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
+    _Py_REPARSE_DATA_BUFFER *rdb = (_Py_REPARSE_DATA_BUFFER *)target_buffer;
+    const wchar_t *print_name;
+#endif
     PyObject *return_value = NULL;
     static char *keywords[] = {"path", "dir_fd", NULL};
 
     memset(&path, 0, sizeof(path));
     path.function_name = "readlink";
     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O&|$O&:readlink", keywords,
                           path_converter, &path,
-                          READLINKAT_DIR_FD_CONVERTER, &dir_fd))
+#if defined(HAVE_READLINK)
+                          READLINKAT_DIR_FD_CONVERTER,
+#elif defined(MS_WINDOWS)
+                          dir_fd_unavailable,
+#endif
+                          &dir_fd))
         return NULL;
 
+#if defined(HAVE_READLINK)
     Py_BEGIN_ALLOW_THREADS
 #ifdef HAVE_READLINKAT
     if (dir_fd != DEFAULT_DIR_FD)
@@ -7455,39 +7468,7 @@ posix_readlink(PyObject *self, PyObject *args, PyObject *kwargs)
         return_value = PyUnicode_DecodeFSDefaultAndSize(buffer, length);
     else
         return_value = PyBytes_FromStringAndSize(buffer, length);
-exit:
-    path_cleanup(&path);
-    return return_value;
-}
-
-#endif /* HAVE_READLINK */
-
-#if !defined(HAVE_READLINK) && defined(MS_WINDOWS)
-
-static PyObject *
-win_readlink(PyObject *self, PyObject *args, PyObject *kwargs)
-{
-    path_t path;
-    DWORD n_bytes_returned;
-    DWORD io_result;
-    PyObject *result = NULL;
-    int dir_fd;
-    HANDLE reparse_point_handle;
-
-    char target_buffer[_Py_MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
-    _Py_REPARSE_DATA_BUFFER *rdb = (_Py_REPARSE_DATA_BUFFER *)target_buffer;
-    const wchar_t *print_name;
-
-    static char *keywords[] = {"path", "dir_fd", NULL};
-
-    memset(&path, 0, sizeof(path));
-    path.function_name = "readlink";
-    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O&|$O&:readlink", keywords,
-                          path_converter, &path,
-                          dir_fd_unavailable, &dir_fd
-                          ))
-        goto exit;
-
+#elif defined(MS_WINDOWS)
     /* First get a handle to the reparse point */
     Py_BEGIN_ALLOW_THREADS
     reparse_point_handle = CreateFileW(
@@ -7501,7 +7482,7 @@ win_readlink(PyObject *self, PyObject *args, PyObject *kwargs)
     Py_END_ALLOW_THREADS
 
     if (reparse_point_handle == INVALID_HANDLE_VALUE) {
-        result = path_error(&path);
+        return_value = path_error(&path);
         goto exit;
     }
 
@@ -7519,7 +7500,7 @@ win_readlink(PyObject *self, PyObject *args, PyObject *kwargs)
     Py_END_ALLOW_THREADS
 
     if (io_result == 0) {
-        result = path_error(&path);
+        return_value = path_error(&path);
         goto exit;
     }
 
@@ -7532,22 +7513,20 @@ win_readlink(PyObject *self, PyObject *args, PyObject *kwargs)
     print_name = (wchar_t *)((char*)rdb->SymbolicLinkReparseBuffer.PathBuffer +
                  rdb->SymbolicLinkReparseBuffer.PrintNameOffset);
 
-    result = PyUnicode_FromWideChar(print_name,
-                    rdb->SymbolicLinkReparseBuffer.PrintNameLength / sizeof(wchar_t));
+    return_value = PyUnicode_FromWideChar(print_name,
+                          rdb->SymbolicLinkReparseBuffer.PrintNameLength / sizeof(wchar_t));
     if (path.narrow) {
-        Py_SETREF(result, PyUnicode_EncodeFSDefault(result));
-        if (!result) {
+        Py_SETREF(return_value, PyUnicode_EncodeFSDefault(return_value));
+        if (!return_value) {
             goto exit;
         }
     }
+#endif
 exit:
     path_cleanup(&path);
-    return result;
+    return return_value;
 }
-
-#endif /* !defined(HAVE_READLINK) && defined(MS_WINDOWS) */
-
-
+#endif /* defined(HAVE_READLINK) || defined(MS_WINDOWS) */
 
 #ifdef HAVE_SYMLINK
 
@@ -12960,16 +12939,11 @@ static PyMethodDef posix_methods[] = {
     OS_GETPRIORITY_METHODDEF
     OS_SETPRIORITY_METHODDEF
     OS_POSIX_SPAWN_METHODDEF
-#ifdef HAVE_READLINK
+#if defined(HAVE_READLINK) || defined(MS_WINDOWS)
     {"readlink",        (PyCFunction)posix_readlink,
                         METH_VARARGS | METH_KEYWORDS,
                         readlink__doc__},
-#endif /* HAVE_READLINK */
-#if !defined(HAVE_READLINK) && defined(MS_WINDOWS)
-    {"readlink",        (PyCFunction)win_readlink,
-                        METH_VARARGS | METH_KEYWORDS,
-                        readlink__doc__},
-#endif /* !defined(HAVE_READLINK) && defined(MS_WINDOWS) */
+#endif /* defined(HAVE_READLINK) || defined(MS_WINDOWS) */
     OS_RENAME_METHODDEF
     OS_REPLACE_METHODDEF
     OS_RMDIR_METHODDEF