46 lines · cpp
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-exception6//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_mbstate35 : 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_DECL46