1//===-- Implementation of wcrtomb -----------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/wchar/wcrtomb.h"
10
11#include "hdr/types/mbstate_t.h"
12#include "hdr/types/wchar_t.h"
13#include "src/__support/common.h"
14#include "src/__support/libc_errno.h"
15#include "src/__support/macros/config.h"
16#include "src/__support/wchar/mbstate.h"
17#include "src/__support/wchar/wcrtomb.h"
18
19namespace LIBC_NAMESPACE_DECL {
20
21LLVM_LIBC_FUNCTION(size_t, wcrtomb,
22 (char *__restrict s, wchar_t wc, mbstate_t *__restrict ps)) {
23 static internal::mbstate internal_mbstate;
24
25 // when s is nullptr, this is equivalent to wcrtomb(buf, L'\0', ps)
26 char buf[sizeof(wchar_t) / sizeof(char)];
27 if (s == nullptr) {
28 s = buf;
29 wc = L'\0';
30 }
31
32 auto result = internal::wcrtomb(
33 s, wc,
34 ps == nullptr ? &internal_mbstate
35 : reinterpret_cast<internal::mbstate *>(ps));
36
37 if (!result.has_value()) {
38 libc_errno = result.error();
39 return -1;
40 }
41
42 return result.value();
43}
44
45} // namespace LIBC_NAMESPACE_DECL
46

source code of libc/src/wchar/wcrtomb.cpp