Regex [FreeBSD WIKI]

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===== New regex implementation for libc =====

There is a work in progress to replace our old libc-regex code with a new implementation. Work has been done to replace it with an implementation that is based on [[http://laurikari.net/tre/|TRE]]. Some other implementations to consider, given the current state of this project:

  * [[https://github.com/kkos/oniguruma|Oniguruma]] (Ruby uses this)
  * [[https://github.com/k-takata/Onigmo|Onigmo]] (Fork of Oniguruma, adds Perl extensions, Ruby and others switching to it)
  * [[http://gitweb.dragonflybsd.org/dragonfly.git/tree/HEAD:/contrib/tre|DragonflyBSD's import of libtre]] (2016 version of libtre with some improvements)

==== Status ====

^ Item ^ Status ^
| Compile TRE as part of libc | COMPLETED |
| Implement the Boyer-Moore algorithm for fast pattern matching | COMPLETED |
| Implement heuristic matching to speed up normal matches with the above algorithm | COMPLETED |
| Write regression tests | COMPLETED |
| Write manual pages | COMPLETED |
| Implement GNU-style permissive syntax | INCOMPLETE |
| Implement multi-pattern compiling and matching with an alternative interface | INCOMPLETE |

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{{tag>Project Stale Todo}}