Chris@16: // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
Chris@16: // (C) Copyright 2005-2007 Jonathan Turkanis
Chris@16: // (C) Copyright Jonathan Graehl 2004.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
Chris@16: 
Chris@16: // See http://www.boost.org/libs/iostreams for documentation.
Chris@16: 
Chris@16: // Used by mapped_file.cpp.
Chris@16: 
Chris@16: #ifndef BOOST_IOSTREAMS_DETAIL_SYSTEM_FAILURE_HPP_INCLUDED
Chris@16: #define BOOST_IOSTREAMS_DETAIL_SYSTEM_FAILURE_HPP_INCLUDED
Chris@16: 
Chris@16: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <cstring>
Chris@16: #include <string>
Chris@16: #include <boost/config.hpp>
Chris@16: #include <boost/throw_exception.hpp>
Chris@16: #include <boost/iostreams/detail/config/windows_posix.hpp>
Chris@16: #include <boost/iostreams/detail/ios.hpp>  // failure.
Chris@16: 
Chris@16: #if defined(BOOST_NO_STDC_NAMESPACE) && !defined(__LIBCOMO__)
Chris@16: namespace std { using ::strlen; }
Chris@16: #endif
Chris@16: 
Chris@16: #ifdef BOOST_IOSTREAMS_WINDOWS
Chris@16: # define WIN32_LEAN_AND_MEAN  // Exclude rarely-used stuff from Windows headers
Chris@16: # include <windows.h>
Chris@16: #else
Chris@16: # include <errno.h>
Chris@16: # include <string.h>
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost { namespace iostreams { namespace detail {
Chris@16: 
Chris@16: inline BOOST_IOSTREAMS_FAILURE system_failure(const char* msg)
Chris@16: {
Chris@16:     std::string result;
Chris@16: #ifdef BOOST_IOSTREAMS_WINDOWS
Chris@16:     DWORD err;
Chris@16:     LPVOID lpMsgBuf;
Chris@16:     if ( (err = ::GetLastError()) != NO_ERROR &&
Chris@16:          ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
Chris@16:                            FORMAT_MESSAGE_FROM_SYSTEM,
Chris@16:                            NULL,
Chris@16:                            err,
Chris@16:                            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
Chris@16:                            (LPSTR) &lpMsgBuf,
Chris@16:                            0,
Chris@16:                            NULL ) != 0 )
Chris@16:     {
Chris@16:         result.reserve(std::strlen(msg) + 2 + std::strlen((LPSTR)lpMsgBuf));
Chris@16:         result.append(msg);
Chris@16:         result.append(": ");
Chris@16:         result.append((LPSTR) lpMsgBuf);
Chris@16:         ::LocalFree(lpMsgBuf);
Chris@16:     } else {
Chris@16:         result += msg;
Chris@16:     }
Chris@16: #else
Chris@16:     const char* system_msg = errno ? strerror(errno) : "";
Chris@16:     result.reserve(std::strlen(msg) + 2 + std::strlen(system_msg));
Chris@16:     result.append(msg);
Chris@16:     result.append(": ");
Chris@16:     result.append(system_msg);
Chris@16: #endif
Chris@16:     return BOOST_IOSTREAMS_FAILURE(result);
Chris@16: }
Chris@16: 
Chris@16: inline BOOST_IOSTREAMS_FAILURE system_failure(const std::string& msg)
Chris@16: { return system_failure(msg.c_str()); }
Chris@16: 
Chris@16: inline void throw_system_failure(const char* msg)
Chris@16: { boost::throw_exception(system_failure(msg)); }
Chris@16: 
Chris@16: inline void throw_system_failure(const std::string& msg)
Chris@16: { boost::throw_exception(system_failure(msg)); }
Chris@16: 
Chris@16: } } } // End namespaces detail, iostreams, boost.
Chris@16: 
Chris@16: #endif // #ifndef BOOST_IOSTREAMS_DETAIL_SYSTEM_FAILURE_HPP_INCLUDED