Re: [Swig-devel] Need inverse of swig

[Klaus K. <kk...@su...>]

* Bob Algiers <bob...@ya...> [Jan 23. 2014 19:34]:
> Swig is great.  I use it at work (nvidia) to speed up perl programs.
> 
> Swig would be even more powerful if it could call the scripting languages from c/c++.  If you could normalize to c++, then you could call any of your scripting languages from any other.  I would use this to provide python bindings to perl modules.

Bob,

Swig gives you the necessary mapping of data structures from c/c++ to
the respective target language. You need to add code to load and
initialize the respective target language environment.

I have done this a couple of times in the past. One has to provide
some additional wrapper code, but it works pretty nicely in general.

https://github.com/kkaempf/cmpi-bindings implements a dynamically
loadable component for a CIMOM
(http://en.wikipedia.org/wiki/Web-Based_Enterprise_Management)
https://github.com/kkaempf/cmpi-bindings/blob/master/src/cmpi_provider.c
is the generic 'C' interface, calling language-specific functions in
the respective target_xxx.c files.
You can find examples for Perl, Python, and Ruby at https://github.com/kkaempf/cmpi-bindings/tree/master/src

Another example is at
https://github.com/Openwsman/openwsman/tree/master/src/plugins/swig
implementing a dynamically loadable Ruby or Python plugin to a WS-Management server.

The 'C' interface is implemented in
https://github.com/Openwsman/openwsman/blob/master/src/plugins/swig/src/swig-plugin.c
The Ruby interface in
https://github.com/Openwsman/openwsman/blob/master/src/plugins/swig/src/target_ruby.c
(Respective Ruby code in https://github.com/Openwsman/openwsman/tree/master/src/plugins/swig/ruby)
and the Python interface in
https://github.com/Openwsman/openwsman/blob/master/src/plugins/swig/src/target_python.c
(Respective Python code in https://github.com/Openwsman/openwsman/tree/master/src/plugins/swig/python)

Enjoy,

Klaus
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