wmemmove.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2020 Tobias Hienzsch
 
#ifndef TETL_CWCHAR_WMEMMOVE_HPP
#define TETL_CWCHAR_WMEMMOVE_HPP
 
#include <etl/_config/all.hpp>
 
#include <etl/_cstddef/size_t.hpp>
#include <etl/_strings/cstr.hpp>
 
namespace etl {
 
/// \brief Copies exactly count successive wide characters from the wide
/// character array pointed to by src to the wide character array pointed to by
/// dest.
///
/// \details If count is zero, the function does nothing. The arrays may
/// overlap: copying takes place as if the wide characters were copied to a
/// temporary wide character array and then copied from the temporary array to
/// dest. This function is not locale-sensitive and pays no attention to the
/// values of the wchar_t objects it copies: nulls as well as invalid characters
/// are copied too.
///
/// https://en.cppreference.com/w/cpp/string/wide/wmemmove
constexpr auto wmemmove(wchar_t* dest, wchar_t const* src, etl::size_t count) noexcept -> wchar_t*
{
#if __has_builtin(__builtin_wmemmove)
    return __builtin_wmemmove(dest, src, count);
#else
    return etl::detail::memmove<wchar_t, etl::size_t>(dest, src, count);
#endif
}
} // namespace etl
#endif // TETL_CWCHAR_WMEMMOVE_HPP