Question on parsing R code from C

Simon Urbanek <simon.urbanek <at> r-project.org> writes:

Except that you don't know what are macros, inlined functions and actual 

functions. If you are careful you

can possibly fall back to external functions but, obviously, your code will be 

less efficient. I would

still prefer including Rinternals.h - you must have a *really* good reason to 

not do so ;)

Hmmm yes there are good motives (I am not completely unreasonable, yet :P) but I 
could probably cope with it if there is no other way.

Regarding the rest of the e-mail, please let me be clearer on what my goal is. I 
would need a function to create and initialize an R state, a function to close 
the state, and a function (R_ParseVector?) that takes as input the R state and a 
string (containing R code), evaluates the code and return an "error code" 
(error, incomplete, done) plus (eventually) a string containing the output of 
the computation.

In my application I do not have any UI elements (it's console based), but I 
would like calls to plot in R (and other functions using the graphic device) to 
function as they would under R.exe (on windows), i.e. have persistent windows 
popped up which you can resize ecc ecc. I naively thought that these graphic 
capabilities came automatically with the R_ParseVector via some threading 
techniques.

Thanks for all your comments!


Cheers