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