[−][src]Struct rand_mt::Mt19937GenRand32
The 32-bit flavor of the Mersenne Twister pseudorandom number generator.
The official name of this RNG is MT19937
. It natively outputs u32
.
Size
Mt19937GenRand32
requires approximately 2.5KB of internal state.
You may wish to store an Mt19937GenRand32
on the heap in a Box
to make
it easier to embed in another struct.
Mt19937GenRand32
is also the same size as
Mt19937GenRand64
.
assert_eq!(2504, mem::size_of::<Mt19937GenRand32>()); assert_eq!(mem::size_of::<Mt19937GenRand64>(), mem::size_of::<Mt19937GenRand32>());
Implementations
impl Mt19937GenRand32
[src]
pub const DEFAULT_SEED: u32
[src]
Default seed used by Mt19937GenRand32::new_unseeded
.
#[must_use]pub fn new(seed: u32) -> Self
[src]
Create a new Mersenne Twister random number generator using the given seed.
Examples
Constructing with a u32
seed
let seed = 123_456_789_u32; let mt1 = Mt19937GenRand32::new(seed); let mt2 = Mt19937GenRand32::from(seed.to_le_bytes()); assert_eq!(mt1, mt2);
Constructing with default seed
let mt1 = Mt19937GenRand32::new(Mt19937GenRand32::DEFAULT_SEED); let mt2 = Mt19937GenRand32::new_unseeded(); assert_eq!(mt1, mt2);
#[must_use]pub fn new_with_key<I>(key: I) -> Self where
I: IntoIterator<Item = u32>,
I::IntoIter: Clone,
[src]
I: IntoIterator<Item = u32>,
I::IntoIter: Clone,
Create a new Mersenne Twister random number generator using the given key.
Key can have any length.
#[must_use]pub fn new_unseeded() -> Self
[src]
Create a new Mersenne Twister random number generator using the default fixed seed.
Examples
// Default MT seed let seed = 5489_u32; let mt = Mt19937GenRand32::new(seed); let unseeded = Mt19937GenRand32::new_unseeded(); assert_eq!(mt, unseeded);
pub fn next_u64(&mut self) -> u64
[src]
Generate next u64
output.
This function is implemented by generating two u32
s from the RNG and
shifting + masking them into a u64
output.
Examples
let mut mt = Mt19937GenRand32::new_unseeded(); assert_ne!(mt.next_u64(), mt.next_u64());
pub fn next_u32(&mut self) -> u32
[src]
Generate next u32
output.
u32
is the native output of the generator. This function advances the
RNG step counter by one.
Examples
let mut mt = Mt19937GenRand32::new_unseeded(); assert_ne!(mt.next_u32(), mt.next_u32());
pub fn fill_bytes(&mut self, dest: &mut [u8])
[src]
Fill a buffer with bytes generated from the RNG.
This method generates random u32
s (the native output unit of the RNG)
until dest
is filled.
This method may discard some output bits if dest.len()
is not a
multiple of 4.
Examples
let mut mt = Mt19937GenRand32::new_unseeded(); let mut buf = [0; 32]; mt.fill_bytes(&mut buf); assert_ne!([0; 32], buf); let mut buf = [0; 31]; mt.fill_bytes(&mut buf); assert_ne!([0; 31], buf);
pub fn recover<I>(key: I) -> Result<Self, RecoverRngError> where
I: IntoIterator<Item = u32>,
[src]
I: IntoIterator<Item = u32>,
Attempt to recover the internal state of a Mersenne Twister using the past 624 samples.
This conversion takes a history of samples from a RNG and returns a RNG that will produce identical output to the RNG that supplied the samples.
This constructor is also available as a TryFrom
implementation for
&[u32]
.
Errors
If key
has less than 624 elements, an error is returned because there
is not enough data to fully initialize the RNG.
If key
has more than 624 elements, an error is returned because the
recovered RNG will not produce identical output to the RNG that supplied
the samples.
pub fn reseed(&mut self, seed: u32)
[src]
Reseed a Mersenne Twister from a single u32
.
Examples
// Default MT seed let mut mt = Mt19937GenRand32::new_unseeded(); let first = mt.next_u32(); mt.fill_bytes(&mut [0; 512]); // Default MT seed mt.reseed(5489_u32); assert_eq!(first, mt.next_u32());
pub fn reseed_with_key<I>(&mut self, key: I) where
I: IntoIterator<Item = u32>,
I::IntoIter: Clone,
[src]
I: IntoIterator<Item = u32>,
I::IntoIter: Clone,
Reseed a Mersenne Twister from am iterator of u32
s.
Key can have any length.
Trait Implementations
impl Clone for Mt19937GenRand32
[src]
pub fn clone(&self) -> Mt19937GenRand32
[src]
pub fn clone_from(&mut self, source: &Self)
1.0.0[src]
impl Debug for Mt19937GenRand32
[src]
impl Default for Mt19937GenRand32
[src]
pub fn default() -> Self
[src]
Return a new Mt19937GenRand32
with the default seed.
Equivalent to calling Mt19937GenRand32::new_unseeded
.
impl Eq for Mt19937GenRand32
[src]
impl From<[u32; 624]> for Mt19937GenRand32
[src]
pub fn from(key: [u32; 624]) -> Self
[src]
Recover the internal state of a Mersenne Twister using the past 624 samples.
This conversion takes a history of samples from a RNG and returns a RNG that will produce identical output to the RNG that supplied the samples.
impl From<[u8; 4]> for Mt19937GenRand32
[src]
pub fn from(seed: [u8; 4]) -> Self
[src]
Construct a Mersenne Twister RNG from 4 bytes.
The given bytes are treated as a little endian encoded u32
.
Examples
// Default MT seed let seed = 5489_u32.to_le_bytes(); let mut mt = Mt19937GenRand32::from(seed); assert_ne!(mt.next_u32(), mt.next_u32());
This constructor is equivalent to passing a little endian encoded u32
.
// Default MT seed let seed = 5489_u32.to_le_bytes(); let mt1 = Mt19937GenRand32::from(seed); let mt2 = Mt19937GenRand32::new(5489_u32); assert_eq!(mt1, mt2);
impl From<u32> for Mt19937GenRand32
[src]
pub fn from(seed: u32) -> Self
[src]
Construct a Mersenne Twister RNG from a u32
seed.
This function is equivalent to new
.
impl Hash for Mt19937GenRand32
[src]
pub fn hash<__H: Hasher>(&self, state: &mut __H)
[src]
pub fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl Ord for Mt19937GenRand32
[src]
pub fn cmp(&self, other: &Mt19937GenRand32) -> Ordering
[src]
#[must_use]pub fn max(self, other: Self) -> Self
1.21.0[src]
#[must_use]pub fn min(self, other: Self) -> Self
1.21.0[src]
#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self
1.50.0[src]
impl PartialEq<Mt19937GenRand32> for Mt19937GenRand32
[src]
pub fn eq(&self, other: &Mt19937GenRand32) -> bool
[src]
pub fn ne(&self, other: &Mt19937GenRand32) -> bool
[src]
impl PartialOrd<Mt19937GenRand32> for Mt19937GenRand32
[src]
pub fn partial_cmp(&self, other: &Mt19937GenRand32) -> Option<Ordering>
[src]
pub fn lt(&self, other: &Mt19937GenRand32) -> bool
[src]
pub fn le(&self, other: &Mt19937GenRand32) -> bool
[src]
pub fn gt(&self, other: &Mt19937GenRand32) -> bool
[src]
pub fn ge(&self, other: &Mt19937GenRand32) -> bool
[src]
impl RngCore for Mt19937GenRand32
[src]
pub fn next_u64(&mut self) -> u64
[src]
Generate next u64
output.
This function is implemented by generating two u32
s from the RNG and
shifting + masking them into a u64
output.
Examples
use rand_core::RngCore; use rand_mt::Mt19937GenRand32; let mut rng = Mt19937GenRand32::new_unseeded(); assert_ne!(rng.next_u64(), rng.next_u64());
pub fn next_u32(&mut self) -> u32
[src]
Generate next u32
output.
u32
is the native output of the generator. This function advances the
RNG step counter by one.
Examples
use rand_core::RngCore; use rand_mt::Mt19937GenRand32; let mut rng = Mt19937GenRand32::new_unseeded(); assert_ne!(rng.next_u32(), rng.next_u32());
pub fn fill_bytes(&mut self, dest: &mut [u8])
[src]
Fill a buffer with bytes generated from the RNG.
This method generates random u32
s (the native output unit of the RNG)
until dest
is filled.
This method may discard some output bits if dest.len()
is not a
multiple of 4.
Examples
use rand_core::RngCore; use rand_mt::Mt19937GenRand32; let mut rng = Mt19937GenRand32::new_unseeded(); let mut buf = [0; 32]; rng.fill_bytes(&mut buf); assert_ne!([0; 32], buf); let mut buf = [0; 31]; rng.fill_bytes(&mut buf); assert_ne!([0; 31], buf);
pub fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>
[src]
Fill a buffer with bytes generated from the RNG.
This method generates random u32
s (the native output unit of the RNG)
until dest
is filled.
This method may discard some output bits if dest.len()
is not a
multiple of 4.
try_fill_bytes
is implemented with fill_bytes
and is infallible.
Examples
use rand_core::RngCore; use rand_mt::Mt19937GenRand32; let mut rng = Mt19937GenRand32::new_unseeded(); let mut buf = [0; 32]; rng.try_fill_bytes(&mut buf)?; assert_ne!([0; 32], buf); let mut buf = [0; 31]; rng.try_fill_bytes(&mut buf)?; assert_ne!([0; 31], buf);
impl SeedableRng for Mt19937GenRand32
[src]
type Seed = [u8; 4]
Seed type, which is restricted to types mutably-dereferencable as u8
arrays (we recommend [u8; N]
for some N
). Read more
pub fn from_seed(seed: Self::Seed) -> Self
[src]
Reseed from a little endian encoded u32
.
Examples
use rand_core::{RngCore, SeedableRng}; use rand_mt::Mt19937GenRand32; // Default MT seed let seed = 5489_u32.to_le_bytes(); let mut rng = Mt19937GenRand32::from_seed(seed); assert_ne!(rng.next_u32(), rng.next_u32());
pub fn seed_from_u64(state: u64) -> Self
[src]
pub fn from_rng<R>(rng: R) -> Result<Self, Error> where
R: RngCore,
[src]
R: RngCore,
impl StructuralEq for Mt19937GenRand32
[src]
impl StructuralPartialEq for Mt19937GenRand32
[src]
impl TryFrom<&'_ [u32]> for Mt19937GenRand32
[src]
type Error = RecoverRngError
The type returned in the event of a conversion error.
pub fn try_from(key: &[u32]) -> Result<Self, Self::Error>
[src]
Attempt to recover the internal state of a Mersenne Twister using the past 624 samples.
This conversion takes a history of samples from a RNG and returns a RNG that will produce identical output to the RNG that supplied the samples.
This conversion is implemented with Mt19937GenRand32::recover
.
Errors
If key
has less than 624 elements, an error is returned because there
is not enough data to fully initialize the RNG.
If key
has more than 624 elements, an error is returned because the
recovered RNG will not produce identical output to the RNG that supplied
the samples.
Auto Trait Implementations
impl RefUnwindSafe for Mt19937GenRand32
[src]
impl Send for Mt19937GenRand32
[src]
impl Sync for Mt19937GenRand32
[src]
impl Unpin for Mt19937GenRand32
[src]
impl UnwindSafe for Mt19937GenRand32
[src]
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
[src]
impl<T> From<T> for T
[src]
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T> ToOwned for T where
T: Clone,
[src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
[src]
pub fn clone_into(&self, target: &mut T)
[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
[src]
U: TryFrom<T>,