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Commentz-Walter algorithm

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In computer science, the Commentz-Walter algorithm is a string searching algorithm invented by Beate Commentz-Walter. Like the Aho–Corasick string matching algorithm, it can search for multiple patterns at once. It combines ideas from Aho–Corasick with the fast matching of the Boyer–Moore string search algorithm. For a text of length n and maximum pattern length of L, its worst-case running time is O(nL), though the average case is often much better.[1]

GNU grep implements a string matching algorithm very similar to Commentz-Walter.[2]

References

  1. ^ Watson, Bruce (1995). Taxonomies and Toolkits of Regular Language Algorithms (PDF). Eindhoven, The Netherlands: Eindhoven University of Technology. pp. 53, 116.
  2. ^ http://git.savannah.gnu.org/cgit/grep.git/tree/src/kwset.c


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