#include <iostream>

#include <memory>

#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>

#include <windows.h>

void explain (std::string what) {
	DWORD e = GetLastError ();

	std::cerr << what << ": ";

	DWORD r;
	std::shared_ptr<char> buf;
	{
		LPSTR buf_;
		r = FormatMessageA (FORMAT_MESSAGE_ALLOCATE_BUFFER
				| FORMAT_MESSAGE_FROM_SYSTEM
				| FORMAT_MESSAGE_IGNORE_INSERTS,
			0,
			e,
			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
			reinterpret_cast<LPSTR> (&buf_), 0,
			0);
		buf.reset (buf_, LocalFree);
	}

	if (r) {
		char* end = buf.get () + std::strlen (buf.get ());
		if (std::distance (buf.get (), end) >= 2 && *(end-2) == '\r' && *(end-1) == '\n')
			end -= 2;
		std::copy (buf.get (), end, std::ostream_iterator<char> (std::cerr));
	}
	else
		std::cerr << "?[" << GetLastError () << "]";

	std::cerr << " (" << e << ")\n";
}

int main () {
	using namespace boost::filesystem;

	path p = L"umbre☂☂a";

	HANDLE fh = CreateFileW (p.c_str (), GENERIC_WRITE, 0, 0, CREATE_NEW, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE, 0);
	if (fh == INVALID_HANDLE_VALUE)
		explain ("CreateFileW");
	else {
		if (!CloseHandle (fh)) {
			explain ("CloseHandle");
			return 1;
		}
	}

	ofstream f (p, ofstream::out);
	if (!f) {
		explain ("ofstream");
		return 1;
	}

	f << "blah blah\n";
	f.close ();
	if (!f) {
		explain ("close");
		return 1;
	}
}

// vim: ts=4 sw=4 noet