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15 lines
827 B
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15 lines
827 B
Plaintext
Libtre is an attempt to create a lightweight, robust, and efficient fully
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POSIX compliant regexp matching library. There is still some work left, but
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the results so far are promising.
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At the core of Libtre is a new algorithm for regular expression matching with
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submatch addressing. The algorithm uses linear worst-case time in the length
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of the text being searched, and quadratic worst-case time in the length of the
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used regular expression. In other words, the time complexity of the algorithm
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is O(M2N), where M is the length of the regular expression and N is the length
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of the text. The used space is also quadratic on the length of the regex, but
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does not depend on the searched string. This quadratic behaviour occurs only
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on pathological cases which are probably very rare in practice.
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WWW: http://laurikari.net/tre/
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