From: Tadeusz Bochan <tad@...>
Date: 2011-02-26T06:43:24+09:00
Subject: Re: Console output formatting

Hi.
If you look in your ruby folders, you should find a file called dl.txt.
Rudimentary and cryptic documuntation, but reading it with a bit of 
patience may help. It is some time ago that I looked it, and the best 
doc I found was at http://www.jbrowse.com/text/rdl_en.html but at the 
moment I get 'access denied' when I tried to go there.

The method I described earlier has served me very well and it is quite 
easy once you get the hang of it.
Firtly, you tell DL where your library is :
lib1=DL.dlopen(library) # Open library
then you create 'pointers' to the routines you want, along with the 
parameter prototype string. I remember there were quite a few parameter 
code, but the only ones I ended up using were 'I' & 'S' without 
problems.
Some others were "L" for long, "P" for pointer.
As long as you are clear about passing parameters by value or by 
reference you should be ok. (I don't do C, but I still manage)

func1=lib1['funtion1','ISSSS') # integer returncode +4 parameters passed 
by reference
Then to call the function, you can use .call or []

returncode=func1.call(p1,p2,p3,"p4").first
or
returncode=func1[p1,p2,p3,"p4"].first

HTH

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