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电子学报  2012 

一种基于智能有限自动机的正则表达式匹配算法

DOI: 10.3969/j.issn.0372-2112.2012.08.019, PP. 1617-1624

Keywords: 深度数据包检测,正则表达式匹配,确定型有限自动机,扩展有限自动机,智能有限自动机

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Abstract:

本文提出了一种基于智能有限自动机(SmartFiniteAutomaton,SFA)的正则表达式匹配算法,在XFA的分支迁移边上增加额外的判断操作指令,消除XFA的回退迁移边,避免不必要的状态迁移操作.实验结果表明,SFA提高了正则表达式匹配的时空效率,与XFA相比,在存储空间开销上减少了44.1%,在存储器访问次数上减少了69.1%.

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