randomize 2.1.0

A dead simple to use randomization library for rust.
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#![feature(test)]

extern crate test;
use test::Bencher;

use randomize::*;
use std::time::{SystemTime, UNIX_EPOCH};

pub fn u64_from_time() -> u64 {
  let unix_delta = match SystemTime::now().duration_since(UNIX_EPOCH) {
    Ok(duration) => duration,
    Err(system_time_error) => system_time_error.duration(),
  };
  if unix_delta.subsec_nanos() != 0 {
    unix_delta.as_secs().wrapping_mul(unix_delta.subsec_nanos() as u64)
  } else {
    unix_delta.as_secs()
  }
}

#[bench]
fn bench_xsh_rr_16_8(b: &mut Bencher) {
  let mut state = u64_from_time() as u16;
  b.iter(|| state = xsh_rr_16_8(state) as u16);
}

#[bench]
fn bench_xsh_rr_32_16(b: &mut Bencher) {
  let mut state = u64_from_time() as u32;
  b.iter(|| state = xsh_rr_32_16(state) as u32);
}

#[bench]
fn bench_xsh_rr_64_32(b: &mut Bencher) {
  let mut state = u64_from_time();
  b.iter(|| state = xsh_rr_64_32(state) as u64);
}

#[bench]
fn bench_xsh_rr_128_64(b: &mut Bencher) {
  let mut state = ((u64_from_time() as u128) << 64) | (u64_from_time() as u128);
  b.iter(|| state = xsh_rr_128_64(state) as u128);
}