ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/detail/system_failure.hpp b/include/ndnboost/iostreams/detail/system_failure.hpp
new file mode 100644
index 0000000..4a9dcbc
--- /dev/null
+++ b/include/ndnboost/iostreams/detail/system_failure.hpp
@@ -0,0 +1,84 @@
+// (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