error_code.cpp

Boost provides free peer-reviewed portable C++ source libraries. We emphasize libraries that work

    case ENOTCONN: return make_error_condition( not_connected );
    case ENOTDIR: return make_error_condition( not_a_directory );
  # if ENOTEMPTY != EEXIST // AIX treats ENOTEMPTY and EEXIST as the same value
    case ENOTEMPTY: return make_error_condition( directory_not_empty );
  # endif // ENOTEMPTY != EEXIST
    case ENOTRECOVERABLE: return make_error_condition( state_not_recoverable );
    case ENOTSOCK: return make_error_condition( not_a_socket );
    case ENOTSUP: return make_error_condition( not_supported );
    case ENOTTY: return make_error_condition( inappropriate_io_control_operation );
    case ENXIO: return make_error_condition( no_such_device_or_address );
  # if EOPNOTSUPP != ENOTSUP
    case EOPNOTSUPP: return make_error_condition( operation_not_supported );
  # endif // EOPNOTSUPP != ENOTSUP
    case EOVERFLOW: return make_error_condition( value_too_large );
    case EOWNERDEAD: return make_error_condition( owner_dead );
    case EPERM: return make_error_condition( operation_not_permitted );
    case EPIPE: return make_error_condition( broken_pipe );
    case EPROTO: return make_error_condition( protocol_error );
    case EPROTONOSUPPORT: return make_error_condition( protocol_not_supported );
    case EPROTOTYPE: return make_error_condition( wrong_protocol_type );
    case ERANGE: return make_error_condition( result_out_of_range );
    case EROFS: return make_error_condition( read_only_file_system );
    case ESPIPE: return make_error_condition( invalid_seek );
    case ESRCH: return make_error_condition( no_such_process );
    case ETIME: return make_error_condition( stream_timeout );
    case ETIMEDOUT: return make_error_condition( timed_out );
    case ETXTBSY: return make_error_condition( text_file_busy );
  # if EAGAIN != EWOULDBLOCK
    case EWOULDBLOCK: return make_error_condition( operation_would_block );
  # endif // EAGAIN != EWOULDBLOCK
    case EXDEV: return make_error_condition( cross_device_link );
  #else
    // Windows system -> posix_errno decode table  ---------------------------//
    // see WinError.h comments for descriptions of errors
    case ERROR_ACCESS_DENIED: return make_error_condition( permission_denied );
    case ERROR_ALREADY_EXISTS: return make_error_condition( file_exists );
    case ERROR_BAD_UNIT: return make_error_condition( no_such_device );
    case ERROR_BUFFER_OVERFLOW: return make_error_condition( filename_too_long );
    case ERROR_BUSY: return make_error_condition( device_or_resource_busy );
    case ERROR_BUSY_DRIVE: return make_error_condition( device_or_resource_busy );
    case ERROR_CANNOT_MAKE: return make_error_condition( permission_denied );
    case ERROR_CANTOPEN: return make_error_condition( io_error );
    case ERROR_CANTREAD: return make_error_condition( io_error );
    case ERROR_CANTWRITE: return make_error_condition( io_error );
    case ERROR_CURRENT_DIRECTORY: return make_error_condition( permission_denied );
    case ERROR_DEV_NOT_EXIST: return make_error_condition( no_such_device );
    case ERROR_DEVICE_IN_USE: return make_error_condition( device_or_resource_busy );
    case ERROR_DIR_NOT_EMPTY: return make_error_condition( directory_not_empty );
    case ERROR_DIRECTORY: return make_error_condition( invalid_argument ); // WinError.h: "The directory name is invalid"
    case ERROR_DISK_FULL: return make_error_condition( no_space_on_device );
    case ERROR_FILE_EXISTS: return make_error_condition( file_exists );
    case ERROR_FILE_NOT_FOUND: return make_error_condition( no_such_file_or_directory );
    case ERROR_HANDLE_DISK_FULL: return make_error_condition( no_space_on_device );
    case ERROR_INVALID_ACCESS: return make_error_condition( permission_denied );
    case ERROR_INVALID_DRIVE: return make_error_condition( no_such_device );
    case ERROR_INVALID_FUNCTION: return make_error_condition( function_not_supported );
    case ERROR_INVALID_HANDLE: return make_error_condition( invalid_argument );
    case ERROR_INVALID_NAME: return make_error_condition( invalid_argument );
    case ERROR_LOCK_VIOLATION: return make_error_condition( no_lock_available );
    case ERROR_LOCKED: return make_error_condition( no_lock_available );
    case ERROR_NEGATIVE_SEEK: return make_error_condition( invalid_argument );
    case ERROR_NOACCESS: return make_error_condition( permission_denied );
    case ERROR_NOT_ENOUGH_MEMORY: return make_error_condition( not_enough_memory );
    case ERROR_NOT_READY: return make_error_condition( resource_unavailable_try_again );
    case ERROR_NOT_SAME_DEVICE: return make_error_condition( cross_device_link );
    case ERROR_OPEN_FAILED: return make_error_condition( io_error );
    case ERROR_OPEN_FILES: return make_error_condition( device_or_resource_busy );
    case ERROR_OPERATION_ABORTED: return make_error_condition( operation_canceled );
    case ERROR_OUTOFMEMORY: return make_error_condition( not_enough_memory );
    case ERROR_PATH_NOT_FOUND: return make_error_condition( no_such_file_or_directory );
    case ERROR_READ_FAULT: return make_error_condition( io_error );
    case ERROR_RETRY: return make_error_condition( resource_unavailable_try_again );
    case ERROR_SEEK: return make_error_condition( io_error );
    case ERROR_SHARING_VIOLATION: return make_error_condition( permission_denied );
    case ERROR_TOO_MANY_OPEN_FILES: return make_error_condition( too_many_files_open );
    case ERROR_WRITE_FAULT: return make_error_condition( io_error );
    case ERROR_WRITE_PROTECT: return make_error_condition( permission_denied );
    case WSAEACCES: return make_error_condition( permission_denied );
    case WSAEADDRINUSE: return make_error_condition( address_in_use );
    case WSAEADDRNOTAVAIL: return make_error_condition( address_not_available );
    case WSAEAFNOSUPPORT: return make_error_condition( address_family_not_supported );
    case WSAEALREADY: return make_error_condition( connection_already_in_progress );
    case WSAEBADF: return make_error_condition( bad_file_descriptor );
    case WSAECONNABORTED: return make_error_condition( connection_aborted );
    case WSAECONNREFUSED: return make_error_condition( connection_refused );
    case WSAECONNRESET: return make_error_condition( connection_reset );
    case WSAEDESTADDRREQ: return make_error_condition( destination_address_required );
    case WSAEFAULT: return make_error_condition( bad_address );
    case WSAEHOSTUNREACH: return make_error_condition( host_unreachable );
    case WSAEINPROGRESS: return make_error_condition( operation_in_progress );
    case WSAEINTR: return make_error_condition( interrupted );
    case WSAEINVAL: return make_error_condition( invalid_argument );
    case WSAEISCONN: return make_error_condition( already_connected );
    case WSAEMFILE: return make_error_condition( too_many_files_open );
    case WSAEMSGSIZE: return make_error_condition( message_size );
    case WSAENAMETOOLONG: return make_error_condition( filename_too_long );
    case WSAENETDOWN: return make_error_condition( network_down );
    case WSAENETRESET: return make_error_condition( network_reset );
    case WSAENETUNREACH: return make_error_condition( network_unreachable );
    case WSAENOBUFS: return make_error_condition( no_buffer_space );
    case WSAENOPROTOOPT: return make_error_condition( no_protocol_option );
    case WSAENOTCONN: return make_error_condition( not_connected );
    case WSAENOTSOCK: return make_error_condition( not_a_socket );
    case WSAEOPNOTSUPP: return make_error_condition( operation_not_supported );
    case WSAEPROTONOSUPPORT: return make_error_condition( protocol_not_supported );
    case WSAEPROTOTYPE: return make_error_condition( wrong_protocol_type );
    case WSAETIMEDOUT: return make_error_condition( timed_out );
    case WSAEWOULDBLOCK: return make_error_condition( operation_would_block );
  #endif
    default: return error_condition( ev, system_category );
    }
  }

# if !defined( BOOST_WINDOWS_API )

  std::string system_error_category::message( int ev ) const
  {
    return generic_category.message( ev );
  }
# else
// TODO:
  
//Some quick notes on the implementation (sorry for the noise if
//someone has already mentioned them):
//
//- The ::LocalFree() usage isn't exception safe.
//
//See:
//
//<http://boost.cvs.sourceforge.net/boost/boost/boost/asio/system_exception.hpp?revision=1.1&view=markup>
//
//in the implementation of what() for an example.
//
//Cheers,
//Chris
  std::string system_error_category::message( int ev ) const
  {
# ifndef BOOST_NO_ANSI_APIS  
    LPVOID lpMsgBuf;
    DWORD retval = ::FormatMessageA( 
        FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM | 
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        ev,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
        (LPSTR) &lpMsgBuf,
        0,
        NULL 
    );
    if (retval == 0)
        return std::string("Unknown error");
        
    std::string str( static_cast<LPCSTR>(lpMsgBuf) );
    ::LocalFree( lpMsgBuf ); // free the buffer
# else  // WinCE workaround
    LPVOID lpMsgBuf;
    DWORD retval = ::FormatMessageW( 
        FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM | 
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        ev,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
        (LPWSTR) &lpMsgBuf,
        0,
        NULL 
    );
    if (retval == 0)
        return std::string("Unknown error");
    
    int num_chars = (wcslen( static_cast<LPCWSTR>(lpMsgBuf) ) + 1) * 2;
    LPSTR narrow_buffer = (LPSTR)_alloca( num_chars );
    if (::WideCharToMultiByte(CP_ACP, 0, static_cast<LPCWSTR>(lpMsgBuf), -1, narrow_buffer, num_chars, NULL, NULL) == 0)
        return std::string("Unknown error");

    std::string str( narrow_buffer );
    ::LocalFree( lpMsgBuf ); // free the buffer
# endif
    while ( str.size()
      && (str[str.size()-1] == '\n' || str[str.size()-1] == '\r') )
        str.erase( str.size()-1 );
    if ( str.size() && str[str.size()-1] == '.' ) 
      { str.erase( str.size()-1 ); }
    return str;
  }
# endif

} // unnamed namespace

namespace boost
{
  namespace system
  {

    BOOST_SYSTEM_DECL error_code throws; // "throw on error" special error_code;
                                         //  note that it doesn't matter if this
                                         //  isn't initialized before use since
                                         //  the only use is to take its
                                         //  address for comparison purposes

    BOOST_SYSTEM_DECL const error_category & get_system_category()
    {
      static const system_error_category  system_category_const;
      return system_category_const;
    }

    BOOST_SYSTEM_DECL const error_category & get_generic_category()
    {
      static const generic_error_category generic_category_const;
      return generic_category_const;
    }

  } // namespace system
} // namespace boost