zircon/kernel/lib/ktl/include/cwchar

// Copyright 2020 The Fuchsia Authors
//
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT

#ifndef ZIRCON_KERNEL_LIB_KTL_INCLUDE_CWCHAR
#define ZIRCON_KERNEL_LIB_KTL_INCLUDE_CWCHAR

// The kernel doesn't want this file but some libc++ headers we need
// wind up including it and they need these declarations.

#include <wchar.h>

#include <__config>

_LIBCPP_BEGIN_NAMESPACE_STD

using ::wmemcpy;
using ::wmemmove;
using ::wmemset;

// These are called by libc++ header code that should never be instantiated.

constexpr size_t __constexpr_wcslen(const wchar_t* str) {
  return 0;
}

constexpr int __constexpr_wmemcmp(const wchar_t* lhs, const wchar_t* rhs, size_t count) {
  return -1;
}

template <class Tp, class Up>
constexpr const Tp* __constexpr_wmemchr(const Tp* str, Up wc, size_t count) {
  return nullptr;
}

_LIBCPP_END_NAMESPACE_STD

#endif  // ZIRCON_KERNEL_LIB_KTL_INCLUDE_CWCHAR