Linux gperf C and C++ command line processing programming tutorial

Posted on in Categories C Programming, Linux, UNIX last updated July 29, 2007

GNU ‘gperf’ generates perfect hash functions. If a long option shows an argument as mandatory, then it is mandatory for the equivalent short option also. Use this tutorial for effective command-line processing in your C/C++ code:

Command-line processing is historically one of the most ignored areas in software development. Just about any relatively complicated software has dozens of available command-line options. In fact, it’s not uncommon to find hundreds of lines of if-else statements coded to process user input, and maintenance of such legacy code becomes a time-consuming affair even for seasoned programmers. In such circumstances, most C developers commonly go for a rather long (and often nested) if-else statement with ANSI C library functions such as strcmp, strcasecmp, and strtok …

The gperf utility is tuned to quickly generate a perfect hash for small to medium datasets. But gperf has other applications, as well. In fact, it’s the tool of choice of maintaining perfect hashes for language keywords in GNU compilers, and recent advances allow you to work with larger datasets. So, consider making gperf part of your next development project.

GNU perfect (gperf) hash function generator makes short work of complex input strings

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

2 comment

  1. I had installed linux fedora core,after installation is there any software to install for c++.plzzz provide sample code of c++ and the steps how to compile and execute the code in linux.

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