Swig is very easy as long as your c code is broken into separate
subroutines. You just add the subroutine descriptions to the .i
file, and run it thru swig, then compile.
Here is an example of controlling your cdrom tray with swig.
cdrom with swig
If you do a search on perlmonks for cdrom, I have the same code
as inline C. You can look at them for comparison.
The advantage to using swig is that it precompiles the c into
a .so shared object file, thereby increasing speed. Inline c needs
to compile the code at each calling of the script.
I havn't tried xs, it just seemed to much complexity for the task
at hand.
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