Using R_xlen_t instead of int so that larger matrices can be computed…

[jaredlander]

… on using vector mode. The standard int has a size limit of 2^31 which can be exceeded when computing distance on a matrix with more than 46,342 rows.

I didn't change the matrix return formats because that shouldn't be as much of a problem since you can have a 32-bit integer in either direction.

[jaredlander]

Just saw your reply. Sorry for the delay. It's not about the loop exceeding the int size, it's about the total size. Particularly proper_size() in src/dists_vec.cpp. Then I changed it everywhere else just to be sure.

[ManosPapadakis95]

You mean for example 50000*50000 which is bigger than 2^31. Yes ok but I will change with size_t and let C++ do its magic. When I change it you better merge the new version to your master or change it by yourself.