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47 lines
926 B
C++

// SPDX-License-Identifier: BSD-2-Clause
// author: Max Kellermann <max.kellermann@gmail.com>
#include "SocketError.hxx"
#include <iterator>
#include <string.h>
#ifdef _WIN32
SocketErrorMessage::SocketErrorMessage(socket_error_t code) noexcept
{
#ifdef _UNICODE
wchar_t buffer[msg_size];
#else
auto *buffer = msg;
#endif
DWORD nbytes = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_MAX_WIDTH_MASK,
nullptr, code, 0,
buffer, msg_size, nullptr);
if (nbytes == 0) {
strcpy(msg, "Unknown error");
return;
}
#ifdef _UNICODE
auto length = WideCharToMultiByte(CP_UTF8, 0, buffer, -1,
msg, std::size(msg),
nullptr, nullptr);
if (length <= 0) {
strcpy(msg, "WideCharToMultiByte() error");
return;
}
#endif
}
#else
SocketErrorMessage::SocketErrorMessage(socket_error_t code) noexcept
:msg(strerror(code)) {}
#endif