Copyright (c) 2011-2013, Longxiang He <longxianghe@gmail.com>,
SmeshLink Technology Co.
Copyright (c) 2019-2020, maikebing <mysticboy@live.com> 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
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   documentation and/or other materials provided with the distribution.
3. Neither the name of the Institute nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS "AS IS" AND
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