lex and yacc: Tools Worth Knowing
The lex, yacc and supporting code was successfully employed to allow the log analysts to process various log curves. To have written the C code to accomplish the lexical analysis and parsing logic would have taken much longer than the four weeks allowed. As it turned out, this code was much easier to create and debug than it was to introduce into the final Motif application, even though it was written as a callback.
In fact, the number of lines of lex (152) and yacc (953) code were far fewer than the number of lines generated by the two (2765). Of course, one could take the time to write much tighter code than these general purpose tools deliver.
Nevertheless, should you be faced with a similar problem, I strongly recommend using lex and yacc. They are powerful, reliable tools worth knowing.
All listings referred to in this article are available by anonymous download in the file ftp://ftp.linuxjournal.com/pub/lj/listings/issue51/2227.tgz.
Special Reports: DevOps
Have projects in development that need help? Have a great development operation in place that can ALWAYS be better? Regardless of where you are in your DevOps process, Linux Journal can help!
With deep focus on Collaborative Development, Continuous Testing and Release & Deployment, we offer here the DEFINITIVE DevOps for Dummies, a mobile Application Development Primer, advice & help from the experts, plus a host of other books, videos, podcasts and more. All free with a quick, one-time registration. Start browsing now...
- Dealing with Boundary Issues
- SUSE – “Will not diverge from its Open Source roots!”
- Libreboot on an X60, Part I: the Setup
- Vagrant Simplified
- October 2015 Issue of Linux Journal: Raspberry Pi
- System Status as SMS Text Messages
- Disney's Linux Light Bulbs (Not a "Luxo Jr." Reboot)
- Bluetooth Hacks
- October 2015 Video Preview
- February 2015 Video Preview