Regular expression matching method and system

摘要

The present invention discloses a regex matching method and system, and relates to the field of computer technologies. The method includes: sorting multiple regexes into several regex groups, where all regexes in one regex group include a common string, which is known as a generic string; compiling each regex group into a DFA, and setting up a correlation between the generic string of each regex group and the DFA; matching to-be-matched data streams with the generic string respectively, and using the matched generic string as a matched string; obtaining a DFA corresponding to the matched string; and performing regex matching for the to-be-matched data streams according to the DFA, and outputting a matching result. The embodiments of the present invention shorten the data loading process, decrease the time consumed by data loading, and improve the matching performance.

主权项

1. A regular expression (regex) matching method, comprising:
sorting multiple regexes into several regex groups, wherein all regexes in one regex group comprise a common string, which is known as a generic string;
compiling each regex group into a Deterministic Finite Automata (DFA), and setting up a correlation between the generic string of each regex group and the DFA, wherein the correlation between the generic string of each regex group and the DFA comprises: a mapping relation between the generic string of each regex group and an address for storing the DFA;matching input data streams with the generic string respectively, and using the matched generic string as a matched string;obtaining a DFA corresponding to the matched string; andperforming regex matching for the input data streams according to the DFA, and outputting a matching result.