llvm/libc/src/__support/wctype_utils.h

//===-- Collection of utils for implementing wide char functions --*-C++-*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_SRC___SUPPORT_WCTYPE_UTILS_H
#define LLVM_LIBC_SRC___SUPPORT_WCTYPE_UTILS_H

#include "src/__support/CPP/optional.h"
#include "src/__support/macros/attributes.h" // LIBC_INLINE
#include "src/__support/macros/config.h"

#define __need_wint_t
#define __need_wchar_t
#include <stddef.h> // needed for wint_t and wchar_t

namespace LIBC_NAMESPACE_DECL {
namespace internal {

// ------------------------------------------------------
// Rationale: Since these classification functions are
// called in other functions, we will avoid the overhead
// of a function call by inlining them.
// ------------------------------------------------------

LIBC_INLINE cpp::optional<int> wctob(wint_t c) { … }

LIBC_INLINE cpp::optional<wint_t> btowc(int c) { … }

} // namespace internal
} // namespace LIBC_NAMESPACE_DECL

#endif // LLVM_LIBC_SRC___SUPPORT_WCTYPE_UTILS_H