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//
 
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// Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com)
 
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// Copyright (c) 2026 Steve Gerbino
 
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//
 
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
 
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
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//
 
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// Official repository: https://github.com/cppalliance/corosio
 
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//
 
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#ifndef BOOST_COROSIO_DETAIL_MAKE_ERR_HPP
 
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#define BOOST_COROSIO_DETAIL_MAKE_ERR_HPP
 
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#include <boost/corosio/detail/config.hpp>
 
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#include <boost/corosio/detail/platform.hpp>
 
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#include <boost/capy/error.hpp>
 
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#include <system_error>
 
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#if BOOST_COROSIO_POSIX
 
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#include <errno.h>
 
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#else
 
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#ifndef WIN32_LEAN_AND_MEAN
 
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#define WIN32_LEAN_AND_MEAN
 
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#endif
 
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#include <Windows.h>
 
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#endif
 
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namespace boost::corosio::detail {
 
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#if BOOST_COROSIO_POSIX
 
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/** Convert a POSIX errno value to std::error_code.
 
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    Maps ECANCELED to capy::error::canceled.
 
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    @param errn The errno value.
 
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    @return The corresponding std::error_code.
 
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*/
 
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inline std::error_code
 
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make_err(int errn) noexcept
 
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{
 
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    if (errn == 0)
 
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        return {};
 
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    if (errn == ECANCELED)
 
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        return capy::error::canceled;
 
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    return std::error_code(errn, std::system_category());
 
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}
 
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#else
 
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/** Convert a Windows error code to std::error_code.
 
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    Maps ERROR_OPERATION_ABORTED, ERROR_CANCELLED, and
 
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    ERROR_NETNAME_DELETED to capy::error::canceled.
 
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    Maps ERROR_HANDLE_EOF to capy::error::eof.
 
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    ERROR_NETNAME_DELETED (64) is what IOCP actually delivers
 
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    when closesocket() cancels pending overlapped I/O, despite
 
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    MSDN documenting ERROR_OPERATION_ABORTED for that case.
 
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    @param dwError The Windows error code (DWORD).
 
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    @return The corresponding std::error_code.
 
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*/
 
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inline std::error_code
 
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make_err(unsigned long dwError) noexcept
 
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{
 
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    if (dwError == 0)
 
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        return {};
 
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    if (dwError == ERROR_OPERATION_ABORTED || dwError == ERROR_CANCELLED ||
 
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        dwError == ERROR_NETNAME_DELETED)
 
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        return capy::error::canceled;
 
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    if (dwError == ERROR_HANDLE_EOF)
 
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        return capy::error::eof;
 
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    return std::error_code(static_cast<int>(dwError), std::system_category());
 
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}
 
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#endif
 
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} // namespace boost::corosio::detail
 
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#endif