tinymt 1.0.9

Rust implementation of TinyMT 64/32 - a lightweight variant of Mersenne Twister PRNG
Documentation 
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use tinymt::tinymt32::*;
use tinymt::TinyMT32;

/// https://github.com/MersenneTwister-Lab/TinyMT/blob/master/tinymt/check32.c
#[test]
fn test_cases_by_author() {
  // tinymt32 0x8f7011ee 0xfc78ff1f 0x3793fdff seed = 1
  let mut tinymt = TinyMT32::new([0, 0, 0, 0], 0x8f7011ee, 0xfc78ff1f, 0x3793fdff);
  let seed = 1;
  tinymt32_init(&mut tinymt, seed);

  test_generate_uint32(&mut tinymt);

  // init_by_array {1}
  let seed_array: [u32; 1] = [1];
  tinymt32_init_by_array(&mut tinymt, &seed_array);

  test_generate_float(&mut tinymt);
  test_generate_float12(&mut tinymt);
  test_generate_float_oc(&mut tinymt);
  test_generate_float_oo(&mut tinymt);
  test_generate_32double(&mut tinymt);
}

/// 32-bit unsigned integers r, where 0 <= r < 2^32
fn test_generate_uint32(tinymt: &mut TinyMT32) {
  let expected = [
    [2545341989, 981918433, 3715302833, 2387538352, 3591001365],
    [3820442102, 2114400566, 2196103051, 2783359912, 764534509],
    [643179475, 1822416315, 881558334, 4207026366, 3690273640],
    [3240535687, 2921447122, 3984931427, 4092394160, 44209675],
    [2188315343, 2908663843, 1834519336, 3774670961, 3019990707],
    [4065554902, 1239765502, 4035716197, 3412127188, 552822483],
    [161364450, 353727785, 140085994, 149132008, 2547770827],
    [4064042525, 4078297538, 2057335507, 622384752, 2041665899],
    [2193913817, 1080849512, 33160901, 662956935, 642999063],
    [3384709977, 1723175122, 3866752252, 521822317, 2292524454],
  ];
  for i in &expected {
    for j in i {
      assert_eq!(*j, tinymt32_generate_uint32(tinymt));
    }
  }
}

// float numbers r, where 0.0 <= r < 1.0
fn test_generate_float(tinymt: &mut TinyMT32) {
  let expected = [
    [0.0132459, 0.2083899, 0.1457998, 0.1144078, 0.6173239],
    [0.0522397, 0.9873815, 0.1503184, 0.4039059, 0.6909348],
    [0.0908061, 0.0637298, 0.5002118, 0.1056944, 0.0936889],
    [0.0609041, 0.0725737, 0.7802556, 0.8761556, 0.5714422],
    [0.1706455, 0.4046335, 0.4131218, 0.2825145, 0.8249400],
    [0.4180385, 0.2152816, 0.4346161, 0.4916836, 0.5997444],
    [0.9118822, 0.1928336, 0.7523277, 0.9890286, 0.7421532],
    [0.9053972, 0.3542482, 0.9161059, 0.1209783, 0.8205475],
    [0.8592415, 0.8379903, 0.6638085, 0.8796422, 0.8608698],
    [0.9255103, 0.6475281, 0.7260162, 0.8757523, 0.0845953],
  ];
  for i in &expected {
    for j in i {
      let actual = tinymt32_generate_float(tinymt);
      assert_eq!(format!("{:.7}", *j), format!("{:.7}", actual));
    }
  }
}

// float numbers r, where 1.0 <= r < 2.0
fn test_generate_float12(tinymt: &mut TinyMT32) {
  let expected = [
    [1.6180767, 1.8378111, 1.7666160, 1.2583882, 1.6962934],
    [1.6468527, 1.8065972, 1.5554585, 1.4074975, 1.0875973],
    [1.9197918, 1.4574956, 1.6669209, 1.8137155, 1.3395888],
    [1.7431080, 1.0419986, 1.7254776, 1.8457749, 1.7100438],
    [1.9055752, 1.1819330, 1.8549275, 1.9305544, 1.1244931],
    [1.2847148, 1.8663290, 1.4107596, 1.1664802, 1.1365448],
    [1.4102769, 1.9013107, 1.9665589, 1.2195582, 1.7036947],
    [1.3244984, 1.3074670, 1.4314530, 1.3307399, 1.4553448],
    [1.2322005, 1.3248408, 1.6282554, 1.6237093, 1.9553823],
    [1.2515985, 1.2902025, 1.8261194, 1.7116343, 1.0828516],
  ];
  for i in &expected {
    for j in i {
      let actual = tinymt32_generate_float12(tinymt);
      assert_eq!(format!("{:.7}", *j), format!("{:.7}", actual));
    }
  }
}

// float numbers r, where 0.0 < r <= 1.0
fn test_generate_float_oc(tinymt: &mut TinyMT32) {
  let expected = [
    [0.4334422, 0.1254190, 0.9491148, 0.7561387, 0.5671672],
    [0.8243424, 0.0393196, 0.3985791, 0.4224766, 0.6121919],
    [0.5195524, 0.0341858, 0.3006201, 0.9415598, 0.1908746],
    [0.6455914, 0.9965364, 0.3110815, 0.4033393, 0.9034473],
    [0.0202459, 0.6251086, 0.2076811, 0.1991719, 0.0160369],
    [0.5703404, 0.8151199, 0.9348064, 0.9298607, 0.6834633],
    [0.2357914, 0.6382589, 0.0393693, 0.4783188, 0.4688579],
    [0.2675911, 0.4227387, 0.2752262, 0.7581965, 0.3906184],
    [0.6015150, 0.4173800, 0.2261215, 0.5006371, 0.2059622],
    [0.1784128, 0.4403929, 0.5902822, 0.2307619, 0.4184512],
  ];
  for i in &expected {
    for j in i {
      let actual = tinymt32_generate_float_oc(tinymt);
      assert_eq!(format!("{:.7}", *j), format!("{:.7}", actual));
    }
  }
}

// float numbers r, where 0.0 < r < 1.0
fn test_generate_float_oo(tinymt: &mut TinyMT32) {
  let expected = [
    [0.7539235, 0.5481223, 0.0172182, 0.3837644, 0.5756599],
    [0.1929101, 0.6351088, 0.1388987, 0.2030107, 0.5359520],
    [0.7981051, 0.8822426, 0.5865937, 0.9584194, 0.9073082],
    [0.6073984, 0.8127722, 0.7480494, 0.9829172, 0.6296896],
    [0.2040328, 0.0169488, 0.5349101, 0.7498616, 0.4206887],
    [0.4468912, 0.6781071, 0.5027536, 0.4000009, 0.2352458],
    [0.3784646, 0.8087858, 0.3579344, 0.6030601, 0.2197810],
    [0.9718446, 0.5287687, 0.7941138, 0.9504710, 0.3413824],
    [0.1003662, 0.8295220, 0.6224557, 0.9157780, 0.4195939],
    [0.2126821, 0.8094529, 0.1176151, 0.1643153, 0.2755433],
  ];
  for i in &expected {
    for j in i {
      let actual = tinymt32_generate_float_oo(tinymt);
      assert_eq!(format!("{:.7}", *j), format!("{:.7}", actual));
    }
  }
}

// 32-bit precision double numbers r, where 0.0 <= r < 1.0
fn test_generate_32double(tinymt: &mut TinyMT32) {
  let expected = [
    [0.4094066, 0.4827545, 0.5979867, 0.2170185, 0.8970369],
    [0.6829838, 0.3973019, 0.2750306, 0.1092794, 0.8370101],
    [0.6354089, 0.5781288, 0.7005250, 0.2332346, 0.8395586],
    [0.3070853, 0.3678428, 0.6112665, 0.9327284, 0.7354169],
    [0.5996112, 0.7402635, 0.1835579, 0.5796655, 0.9021798],
    [0.7528325, 0.0600313, 0.4967926, 0.1992569, 0.6572806],
    [0.9061203, 0.4460495, 0.3509606, 0.9238296, 0.5796654],
    [0.6424482, 0.9554131, 0.5053623, 0.9762550, 0.5047233],
    [0.6132142, 0.2425692, 0.9836005, 0.5532928, 0.4105124],
    [0.5009801, 0.8399252, 0.7654016, 0.6735107, 0.8542220],
  ];
  for i in &expected {
    for j in i {
      let actual = tinymt32_generate_32double(tinymt);
      assert_eq!(format!("{:.7}", *j), format!("{:.7}", actual));
    }
  }
}