[libc-commits] [libc] [libc] Implemented wcrtomb internal function and public libc function (PR #144596)

[Michael Jones via libc-commits]

================
@@ -0,0 +1,34 @@
+//===-- Implementation of wcrtomb -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/wchar/wcrtomb.h"
+
+#include "hdr/types/mbstate_t.h"
+#include "src/__support/common.h"
+#include "src/__support/libc_errno.h"
+#include "src/__support/macros/config.h"
+#include "src/__support/wchar/wcrtomb.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(size_t, wcrtomb,
+                   (char *__restrict s, wchar_t wc, mbstate_t *__restrict ps)) {
+  static mbstate_t internal_mbstate{0, 0, 0};
----------------
michaelrj-google wrote:

if you add a constructor to mbstate that sets the members to 0 you can avoid having to write this in every function. Also since you're initializing this it should use the internal mbstate.

https://github.com/llvm/llvm-project/pull/144596