Regular expression matching with back-references using backtracking
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United States of America Patent
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Jan 23, 2018
Grant Date -
Feb 2, 2017
app pub date -
Jul 27, 2015
filing date -
Jul 27, 2015
priority date (Note) -
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Abstract
A device for matching, in input data, a regular expression with back-references, represented by a finite-state machine (FSM). The device comprises a plurality of parallel processing elements (PPEs), an interconnection network for interconnecting the PPEs with each other, and a memory for receiving and storing input data. The PPEs process the input data stored in the memory, based on backtracking to process the back-references, and implement FA next state logic to generate new active FA configurations or mark themselves as available to receive active FA configurations. The interconnection network retrieves active FA configurations from the PPEs and allocates the active FA configurations to available PPEs. The PPEs are configured to match a regular expression in the input data.
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