[image of the Head of a GNU]
Introduction | Get the Software

Introduction to gperf

GNU gperf is a perfect hash function generator. For a given list of strings, it produces a hash function and hash table, in form of C or C++ code, for looking up a value depending on the input string. The hash function is perfect, which means that the hash table has no collisions, and the hash table lookup needs a single string comparison only.

GNU gperf is highly customizable. There are options for generating C or C++ code, for emitting switch statements or nested ifs instead of a hash table, and for tuning the algorithm employed by gperf.

Online Manual is available at

Downloading gperf

gperf can be found on in the subdirectory /gnu/gperf/ on your favorite GNU mirror. For other ways to obtain gperf, please read How to get GNU Software.

The latest release is

The latest development sources can be obtained through the savannah project.

Return to GNU's home page.

Please send general FSF & GNU inquiries to <>. There are also other ways to contact the FSF.
Please send broken links and other corrections or suggestions to <>.

Copyright (C) 1998, 2010 Free Software Foundation, Inc.

Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.

Updated: $Date: 2010/01/31 14:50:00 $ $Author: haible $