Lib.rs

use lfsr::lfsr_lookup;
use lfsr::galois;
use lfsr::LFSR;

searching_lfsr_lookup!(galois32_lookup, galois::Galois32, 10, 20, 5);
searching_lfsr_lookup!(galois32_lookup_big, galois::Galois32, 99_999_000, 100_001_000, 100);
direct_lfsr_lookup!(galois16_direct_lookup, galois::Galois16);

fn main() {
    // Searching lookup

    let mut lfsr = galois::Galois32::default();
    assert_eq!(galois32_lookup(&lfsr), None);

    for _ in 0..9 {
        lfsr.inc();
    }
    assert_eq!(galois32_lookup(&lfsr), None);

    for _ in 9..10 {
        lfsr.inc();
    }
    assert_eq!(galois32_lookup(&lfsr), Some(10));

    for _ in 10..17 {
        lfsr.inc();
    }
    assert_eq!(galois32_lookup(&lfsr), Some(17));

    for _ in 9..20 {
        lfsr.inc();
    }
    assert_eq!(galois32_lookup(&lfsr), None);

    // Direct lookup

    let mut lfsr = galois::Galois16::default();
    assert_eq!(galois16_direct_lookup(&lfsr), 0);

    for _ in 0..10 {
        lfsr.inc();
    }
    assert_eq!(galois16_direct_lookup(&lfsr), 10);

    for _ in 10..11 {
        lfsr.inc();
    }
    assert_eq!(galois16_direct_lookup(&lfsr), 11);

    for _ in 11..65534 {
        lfsr.inc();
    }
    assert_eq!(galois16_direct_lookup(&lfsr), 65534);

    // wrap around
    lfsr.inc();
    assert_eq!(galois16_direct_lookup(&lfsr), 0);
}