Re: Use Octave's interpreter in my C++ program...

[John Swensen]

On May 22, 2008, at 5:41 PM, John Swensen wrote:

> On May 22, 2008, at 5:26 PM, address@hidden wrote:
>
> > Hello,
> > I would like to use Octave in a C++ multithreaded application.  Is  
> > there
> > something like this (see code below) in Octave so I can get an  
> > instance of
> > Octave and use it throughout the life of my OctaveUser object?   
> > I'll even
> > take something close to this. :)
> >
> > class OctaveUser
> > {
> >  private:
> >    OctaveInstance *p_oi;
> >  public:
> >   OctaveUser()
> >   {
> >       oi = OctaveFactory::createInstance();
> >   }
> >   void cppMethod()
> >   {
> >       Matrix m(2,2);
> >       m(0,0)=1; m(0,1)=2;
> >       m(1,0)=3; m(1,1)=4;
> >       oi.feval("invert", m);
> >
> >       // call 'testFromCpp.m' file.
> >       octave_value_list result = feval ("testFromCpp", octave_value  
> > (m),
> > 1 );
> >       ...//do something with the value in C++
> >   }
> >
> >   ~OctaveUser()
> >   {
> >       delete _oi;
> >   }
> > };
> >
> > Thanks!
> > Molamini
So I went ahead and converted a class I had written for the Matlab  
Engine into a similar class for Octave.  It is based on the pseudo- 
code I sent in my last email.  I have attached a tgz file with the  
simple class and a test program.  This is based on the concept of  
starting up octave_main() in embedded mode, pushing and pulling  
variables from the symbol table, and calling eval string to perform  
actions.  Would the maintainers ever be interested in incorporating a  
more full-fledged version into Octave.  As with the MEX interface, we  
could make the functions act like the Matlab Engine counterparts.

John Swensen

OctaveEngine.tgz
Description: Binary data