Function check_dokany_version

cppcryptfs/dokan/cryptdokan.cpp:2758–2807

return false if won't work, returns true with no message if all ok, returns true with message if there will maybe be a problem

// return false if won't work, returns true with no message if all ok, 
// returns true with message if there will maybe be a problem
bool check_dokany_version(wstring& mes)
{
	constexpr int required_major = 2;
	constexpr int required_middle = 3;
    const wstring required_ver =  to_wstring(required_major) + L"." + to_wstring(required_middle) +  L".x.x";
	
	mes = L"";

	wstring ver;

	vector<int> v;
	if (!get_dokany_version(ver, v)) {
        mes = LocUtils::GetStringFromResources(IDS_UNABLE_GET_DOKANY_VERSION);
		return false;
	}

	if (v.size() < 2) {
		return false;
	}

	const int major = v[0];
	const int middle = v[1];

	if (major == required_major && middle == required_middle) {
		return true;
	}
	
	if (major != required_major) {
        CString strMsg;
          strMsg.Format(LocUtils::GetStringFromResources(IDS_DOKANY_VER_NOT_COMPATIBLE).c_str(), ver, required_ver);
        mes = strMsg;
		return false; // error
	}
	
	if (major == required_major && middle < required_middle) {
        CString strMsg;
          strMsg.Format(LocUtils::GetStringFromResources(IDS_DOKANY_VER_NOT_COMPATIBLE).c_str(), ver, required_ver);
        mes = strMsg;
		return false; // error
	}

	if (major == required_major && middle > required_middle) {
        CString strMsg;
          strMsg.Format(LocUtils::GetStringFromResources(IDS_DOKANY_VER_NOT_TESTED).c_str(), ver, required_ver);
        mes = strMsg;
		return true; // warning
	}

	return false;
}

bool get_fs_info(const wchar_t *mountpoint, FsInfo& info)
{