erlang_nif_sys::erlang_nif_sys_api
pub unsafe extern "C" fn enif_get_string( arg1: *mut ErlNifEnv, list: ERL_NIF_TERM, buf: *mut c_uchar, len: c_uint, arg2: ErlNifCharEncoding) -> c_int
See enif_get_string in the Erlang docs.