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- Mike Haertel wrote the main program and the dfa and kwset matchers.
-
- Arthur David Olson contributed the heuristics for finding fixed substrings
- at the end of dfa.c.
-
- Richard Stallman and Karl Berry wrote the regex backtracking matcher.
-
- Henry Spencer wrote the original test suite from which grep's was derived.
-
- Scott Anderson invented the Khadafy test.
-
- David MacKenzie wrote the automatic configuration software use to
- produce the configure script.
-
- Authors of the replacements for standard library routines are identified
- in the corresponding source files.
-
- The idea of using Boyer-Moore type algorithms to quickly filter out
- non-matching text before calling the regexp matcher was originally due
- to James Woods. He also contributed some code to early versions of
- GNU grep.
-
- Finally, I would like to thank Andrew Hume for many fascinating discussions
- of string searching issues over the years. Hume & Sunday's excellent
- paper on fast string searching (AT&T Bell Laboratories CSTR #156)
- describes some of the history of the subject, as well as providing
- exhaustive performance analysis of various implementation alternatives.
- The inner loop of GNU grep is similar to Hume & Sunday's recommended
- "Tuned Boyer Moore" inner loop.
-