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//===-- Implementation of mbstowcs ----------------------------------------===//
//
// 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/mbstowcs.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/macros/null_check.h"
#include "src/__support/wchar/mbsnrtowcs.h"
#include "src/__support/wchar/mbstate.h"
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(size_t, mbstowcs,
(wchar_t *__restrict pwcs, const char *__restrict s,
size_t n)) {
LIBC_CRASH_ON_NULLPTR(s);
// If destination is null, ignore n
n = pwcs == nullptr ? SIZE_MAX : n;
static internal::mbstate internal_mbstate;
const char *temp = s;
auto ret = internal::mbsnrtowcs(pwcs, &temp, SIZE_MAX, n, &internal_mbstate);
if (!ret.has_value()) {
// Encoding failure
libc_errno = ret.error();
return -1;
}
return ret.value();
}
} // namespace LIBC_NAMESPACE_DECL
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