wmemcpy.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2019 Tobias Hienzsch
 
#ifndef TETL_CWCHAR_WMEMCPY_HPP
#define TETL_CWCHAR_WMEMCPY_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. If the objects overlap, the behavior is undefined. If count is zero,
/// the function does nothing.
///
/// https://en.cppreference.com/w/cpp/string/wide/wmemcpy
constexpr auto wmemcpy(wchar_t* dest, wchar_t const* src, etl::size_t count) noexcept -> wchar_t*
{
#if __has_builtin(__builtin_wmemcpy)
    return __builtin_wmemcpy(dest, src, count);
#else
    if (count == 0) {
        return dest;
    }
    return etl::detail::strncpy(dest, src, count);
#endif
}
 
} // namespace etl
 
#endif // TETL_CWCHAR_WMEMCPY_HPP