agrep
| Developer(s) | <templatestyles src="Plainlist/styles.css"/>
|
|---|---|
| Written in | C |
| Operating system | <templatestyles src="Plainlist/styles.css"/> |
| Type | Pattern matching |
| License | ISC open source license |
| Website | www |
agrep (approximate grep) is an open-source approximate string matching program, developed by Udi Manber and Sun Wu between 1988 and 1991, for use with the Unix operating system. It was later ported to OS/2, DOS, and Windows.
It selects the best-suited algorithm for the current query from a variety of the known fastest (built-in) string searching algorithms, including Manber and Wu's bitap algorithm based on Levenshtein distances.
agrep is also the search engine in the indexer program GLIMPSE. agrep is under a free ISC License.[1]
Alternative implementations
A more recent agrep is the command-line tool provided with the TRE regular expression library. TRE agrep is more powerful than Wu-Manber agrep since it allows weights and total costs to be assigned separately to individual groups in the pattern. It can also handle Unicode.[2] Unlike Wu-Manber agrep, TRE agrep is licensed under a 2-clause BSD-like license.
FREJ (Fuzzy Regular Expressions for Java) open-source library provides command-line interface which could be used in the way similar to agrep. Unlike agrep or TRE it could be used for constructing complex substitutions for matched text.[3] However its syntax and matching abilities differs significantly from ones of ordinary regular expressions.
References
- ↑ WebGlimpse, Glimpse and also AGREP license since 18.09.2014 (ISC License).
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Wu-Manber agrep
- AGREP home page
- For Unix (To compile under OSX 10.8, add
-Wno-return-typeto theCFLAGs = -Oline in the Makefile)
- Entry for "agrep" in Christoph's Personal Wiki
- See also
- TRE regexp matching package
- cgrep a defunct command line approximate string matching tool
- nrgrep a command line approximate string matching tool
- agrep as implemented in R
