detecting parallel fifths and octaves in figured bass

[Eef Weenink]

Maybe somebody already made a script for this: 

In figured bass there are two fundamental rules: Avoid parallell octaves and or 
fifhts. 
So it would be nice to have some scipts what checks for this. So if two voices 
have a distance of a fifth or octave, the next chord is checked if the same two 
voices have a fifth or octave too. If so, they are parallel. 

Any ideas, suggestions? 

regards, Eef