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