From: elathan@...
Date: 2004-01-08T18:46:21+09:00
Subject: Re: convert a C/C++ array to a Ruby array

Quoting nobu.nokada@softhome.net: 
> > While writting a Ruby extension, consider the prototype:  
> >   
> > double * foo(void);  
> >   
> > I would like, optimally, to return a Ruby array with floats, but the 
> problem is that I don't know  
> > the length of the C array of doubles which foo() returns.  
>  
> How do you use it in C at all? 
 
Actually it is part of the functionallity a C++ Class embeds: 
 
Foo::Foo(int n, double *f); 
double * Foo::Get(); 
 
Okay, I can grab 'n' from the constructor and use it as the length 
of the Ruby/C array, but I wanted to make sure that there is no  
general way to procceed without messing with the details of the 
C/C++ code. 
 
Regards,  
Elias