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Using a script to get your IP address

Posted 01-07-2013 at 11:33 AM by sag47

A friend of mine was complaining today how their work place doesn't parse the IP address from ifconfig but asks for manual input from the user. This is the dumbest thing ever. In case you're ever encountered by this here's a horrible one liner to get the job done quick and dirty.

Also, you may need to replace eth2 with your correct interface (such as eth1).
Code:
ifconfig | sed -ne '/^eth2/,/^\s\+Interrupt/p' | awk '$0 ~ /inet addr/ { print $2 }' | cut -d: -f2
It...
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Old

Parser Test 3 (A Return Stack & Compiler)

Posted 01-03-2013 at 09:53 AM by rainbowsally
Updated 01-10-2013 at 06:05 PM by rainbowsally

Parser Test 3 (A Return Stack & Compiler)

A self extractor for the 'lib' files that we include for this (pretty cute) little calculator are here.
http://www.linuxquestions.org/questi...wsally-615861/

Re: the compiler part. It's not much of a compiler, but it serves as a proof of concept. (It's used internally, the program is not compiled.)

Before we dig in here, I should say...

Bug in Parser Test 2.

...
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Old

Parser Test 2 (Something a bit more ambitious, maybe?)

Posted 01-03-2013 at 01:36 AM by rainbowsally

Parser Test 2 (Something a bit more ambitious, maybe?)

Here's test2.

Features:
  • Lots of custom parser funcs in order to create a parser for algebraic expressions. See 'expr' 'times', and all that good stuff in the source file 'src/test2.cpp' below.

This is the output from a session.
Code:
Input some math expressions and maybe we can identify them.
Type 'quit' to end
3b + 5 * 4e-5 / (2 * 5) + 4
<--------------------------->
...
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Old

Parser Test 1

Posted 01-02-2013 at 08:24 PM by rainbowsally
Updated 01-02-2013 at 08:26 PM by rainbowsally

Parser Test 1

------------------------------------

See the previous blog entry: "Playing with parsing" here.
http://www.linuxquestions.org/questi...wsally-615861/
to grab the files we need to include for these tests and a working mc2 definitions file for those who have mc2. Type "mc2 -init" first time. After that "make update" will add/remove files from the makefile.

[Note that we can link OR include...
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Old

Playing with parsing

Posted 01-02-2013 at 07:46 PM by rainbowsally
Updated 08-06-2014 at 08:36 AM by rainbowsally (typo correction)

Playing with parsing

Today's features:
  • Creating an extensible mid-level parser that makes sense in C.
  • Looking at BNF-like syntax and C syntax similarities.
  • Tossing flex as far as we can throw it. While its still burning.

The file set here isn't 'finalized' in any way but it's been stable for a few days. These examples are therefor not about THIS set of functions but about parsing in general, although this file set will very likely be part of the mc2 parsing system...
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