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//===-- Implementation of mbsnrtowcs --------------------------------------===//
//
// 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/mbsnrtowcs.h"
#include "hdr/types/size_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/mbsnrtowcs.h"
#include "src/__support/wchar/mbstate.h"
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(size_t, mbsnrtowcs,
(wchar_t *__restrict dst, const char **__restrict src,
size_t nmc, size_t len, mbstate_t *__restrict ps)) {
static internal::mbstate internal_mbstate;
// If destination is null, ignore len
len = dst == nullptr ? SIZE_MAX : len;
auto ret = internal::mbsnrtowcs(
dst, src, nmc, len,
ps == nullptr ? &internal_mbstate
: reinterpret_cast<internal::mbstate *>(ps));
if (!ret.has_value()) {
// Encoding failure
libc_errno = ret.error();
return -1;
}
return ret.value();
}
} // namespace LIBC_NAMESPACE_DECL
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