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    • 2. 发明授权
    • Methods and apparatuses for evaluation of regular expressions of arbitrary size
    • 用于评估任意大小的正则表达式的方法和装置
    • US07085918B2
    • 2006-08-01
    • US10755048
    • 2004-01-08
    • Harshvardan SharangpaniManoj KhareKent FieldenRajesh PatilJudge Kennedy Arora
    • Harshvardan SharangpaniManoj KhareKent FieldenRajesh PatilJudge Kennedy Arora
    • G06F15/00G06F17/28
    • G06F7/00G06F17/30985
    • Embodiments of the invention provide a programmable FSA building block, having a number of programmable registers and associated logic implemented therein, that provide the capability of contextually evaluating complex REs of arbitrary size against multiple data streams. Embodiments of the invention provide fully programmable hardware in which all of the states of an RE are instantiated and all of the states are fully connected. For one embodiment, the building blocks have a fixed number of states to facilitate implementation on a chip. For such an embodiment, an RE having an excessive number of states is implemented on two or more FSA building blocks and the FSA building blocks are then stitched together to effect evaluation of the RE. For one embodiment, two or more REs having a number of states less than the fixed number of states of a building block may be implemented with a single building block.
    • 本发明的实施例提供了一种可编程FSA构建块,其具有在其中实现的多个可编程寄存器和相关联的逻辑,其提供对多个数据流进行任意大小的复杂RE的上下文评估的能力。 本发明的实施例提供了完全可编程硬件,其中RE的所有状态都被实例化,并且所有状态都完全连接。 对于一个实施例,构建块具有固定数量的状态以便于在芯片上实现。 对于这样的实施例,在两个或更多个FSA构建块上实现具有过多状态的RE,然后将FSA构建块缝合在一起以实现RE的评估。 对于一个实施例,具有小于构建块的固定状态数量的状态数量的两个或更多个RE可以用单个构建块来实现。