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