Re: Geting the value of a top level scheme value from C

[Richard Shann]

Thanks for all the replies - sorry I didn't spot that section of the
manual (perhaps because it came under "Using modules" and I haven't
dipped my toes in that stuff).
I have it working now.

Richard

On Fri, 2014-01-24 at 12:34 -0500, Mark H Weaver wrote:
> Richard Shann <address@hidden> writes:
> 
> > Given a C string that is the name of a Scheme variable what is the call
> > I need to make from C to get the value?
> >
> > That is, in the Scheme I have
> >
> > (define foo "bar")
> >
> > Then in C I want to write
> >
> > SCM bar = scm_var_c_get_val ("foo");//imaginary function name
> 
>   SCM bar = scm_variable_ref (scm_c_lookup ("foo"));
> 
> For better efficiency, do this just once, after 'foo' has been defined:
> 
>   SCM foo_var = scm_c_lookup ("foo");
> 
> and henceforth just do:
> 
>   SCM bar = scm_variable_ref (foo_var);
> 
>      Mark