| // |
| // impl/error_code.ipp |
| // ~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef ASIO_IMPL_ERROR_CODE_IPP |
| #define ASIO_IMPL_ERROR_CODE_IPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #if defined(ASIO_WINDOWS) || defined(__CYGWIN__) |
| # include <winerror.h> |
| #elif defined(ASIO_WINDOWS_RUNTIME) |
| # include <windows.h> |
| #else |
| # include <cerrno> |
| # include <cstring> |
| # include <string> |
| #endif |
| #include "asio/detail/local_free_on_block_exit.hpp" |
| #include "asio/detail/socket_types.hpp" |
| #include "asio/error_code.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| class system_category : public error_category |
| { |
| public: |
| const char* name() const ASIO_ERROR_CATEGORY_NOEXCEPT |
| { |
| return "asio.system"; |
| } |
| |
| std::string message(int value) const |
| { |
| #if defined(ASIO_WINDOWS) || defined(__CYGWIN__) |
| char* msg = 0; |
| DWORD length = ::FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
| | FORMAT_MESSAGE_FROM_SYSTEM |
| | FORMAT_MESSAGE_IGNORE_INSERTS, 0, value, |
| MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (char*)&msg, 0, 0); |
| detail::local_free_on_block_exit local_free_obj(msg); |
| if (length && msg[length - 1] == '\n') |
| msg[--length] = '\0'; |
| if (length && msg[length - 1] == '\r') |
| msg[--length] = '\0'; |
| if (length) |
| return msg; |
| else |
| return "asio.system error"; |
| #elif defined(ASIO_WINDOWS_RUNTIME) |
| std::wstring wmsg(128, wchar_t()); |
| for (;;) |
| { |
| DWORD wlength = ::FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM |
| | FORMAT_MESSAGE_IGNORE_INSERTS, 0, value, |
| MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), &wmsg[0], wmsg.size(), 0); |
| if (wlength == 0 && ::GetLastError() == ERROR_INSUFFICIENT_BUFFER) |
| { |
| wmsg.resize(wmsg.size() + wmsg.size() / 2); |
| continue; |
| } |
| if (wlength && wmsg[wlength - 1] == '\n') |
| --wlength; |
| if (wlength && wmsg[wlength - 1] == '\r') |
| --wlength; |
| if (wlength) |
| { |
| std::string msg(wlength * 2, char()); |
| int length = ::WideCharToMultiByte(CP_ACP, 0, |
| wmsg.c_str(), static_cast<int>(wlength), |
| &msg[0], static_cast<int>(wlength * 2), 0, 0); |
| if (length <= 0) |
| return "asio.system error"; |
| msg.resize(static_cast<std::size_t>(length)); |
| return msg; |
| } |
| else |
| return "asio.system error"; |
| } |
| #else // defined(ASIO_WINDOWS) |
| #if !defined(__sun) |
| if (value == ECANCELED) |
| return "Operation aborted."; |
| #endif // !defined(__sun) |
| #if defined(__sun) || defined(__QNX__) || defined(__SYMBIAN32__) |
| using namespace std; |
| return strerror(value); |
| #elif defined(__MACH__) && defined(__APPLE__) \ |
| || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) \ |
| || defined(_AIX) || defined(__hpux) || defined(__osf__) \ |
| || defined(__ANDROID__) |
| char buf[256] = ""; |
| using namespace std; |
| strerror_r(value, buf, sizeof(buf)); |
| return buf; |
| #else |
| char buf[256] = ""; |
| return strerror_r(value, buf, sizeof(buf)); |
| #endif |
| #endif // defined(ASIO_WINDOWS) |
| } |
| }; |
| |
| } // namespace detail |
| |
| const error_category& system_category() |
| { |
| static detail::system_category instance; |
| return instance; |
| } |
| |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_IMPL_ERROR_CODE_IPP |