36 lines · cpp
1//===-- Implementation of wctomb ------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/stdlib/wctomb.h"10 11#include "hdr/types/wchar_t.h"12#include "src/__support/common.h"13#include "src/__support/libc_errno.h"14#include "src/__support/macros/config.h"15#include "src/__support/wchar/mbstate.h"16#include "src/__support/wchar/wcrtomb.h"17 18namespace LIBC_NAMESPACE_DECL {19 20LLVM_LIBC_FUNCTION(int, wctomb, (char *s, wchar_t wc)) {21 static internal::mbstate internal_mbstate;22 if (s == nullptr)23 return 0;24 25 auto result = internal::wcrtomb(s, wc, &internal_mbstate);26 27 if (!result.has_value()) { // invalid wide character28 libc_errno = EILSEQ;29 return -1;30 }31 32 return static_cast<int>(result.value());33}34 35} // namespace LIBC_NAMESPACE_DECL36