library(ffi) now available

[aarroyoc]

?- user(X, scryer_prolog), hi(X).

I want to announce that library(ffi) is now available on the master branch of Scryer Prolog. The purpose of this library is be able to call native code via a C ABI. Note that FFI is just one way to communicate with the outside world in Scryer Prolog: sockets, files, pipes or the HTTP libraries are also good options depending on the task and they're safer. This library is based on libffi

The library contains two predicates: use_foreign_module/2 and foreign_struct/2. You can find more information about how to use them in its documentation page.

There's a repo with experimental Raylib bindings that can be used to quickly test the functionality of library(ffi). The samples require a compiled Raylib shared library and a change may be needed to load the specific library for your system.

Here are some samples of FFI in action under Arch Linux and Windows 10: