rand_seedrand_newrand_new_seeded2rand_nextrand_freerand_seedfn rand_seed() -> ~[u8]rand_newfn rand_new() -> *rctxrand_new_seeded2fn rand_new_seeded2(&&seed: ~[u8]) -> *rctxrand_nextfn rand_next(c: *rctx) -> u32rand_freefn rand_free(c: *rctx)