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//===-- 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 "hdr/types/wchar_t.h"
#include "src/__support/common.h"
#include "src/__support/libc_errno.h"
#include "src/__support/macros/config.h"
#include "src/__support/wchar/mbstate.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 internal::mbstate internal_mbstate;
// when s is nullptr, this is equivalent to wcrtomb(buf, L'\0', ps)
char buf[sizeof(wchar_t) / sizeof(char)];
if (s == nullptr) {
s = buf;
wc = L'\0';
}
auto result = internal::wcrtomb(
s, wc,
ps == nullptr ? &internal_mbstate
: reinterpret_cast<internal::mbstate *>(ps));
if (!result.has_value()) {
libc_errno = result.error();
return -1;
}
return result.value();
}
} // namespace LIBC_NAMESPACE_DECL
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