Struct rand::reseeding::ReseedingRng

pub struct ReseedingRng<R, Rsdr> {
    pub reseeder: Rsdr,
    // some fields omitted
}

A wrapper around any RNG which reseeds the underlying RNG after it has generated a certain number of random bytes.

Fields

reseeder: Rsdr

Controls the behaviour when reseeding the RNG.

Methods

impl<R: Rng, Rsdr: Reseeder<R>> ReseedingRng<R, Rsdr>

pub fn new(
    rng: R,
    generation_threshold: u64,
    reseeder: Rsdr
) -> ReseedingRng<R, Rsdr>

Create a new ReseedingRng with the given parameters.

Arguments

• rng: the random number generator to use.
• generation_threshold: the number of bytes of entropy at which to reseed the RNG.
• reseeder: the reseeding object to use.

pub fn reseed_if_necessary(&mut self)

Reseed the internal RNG if the number of bytes that have been generated exceed the threshold.

Trait Implementations

impl<R: Rng, Rsdr: Reseeder<R>> Rng for ReseedingRng<R, Rsdr>

fn next_u32(&mut self) -> u32

Return the next random u32.

fn next_u64(&mut self) -> u64

Return the next random u64.

fn fill_bytes(&mut self, dest: &mut [u8])

Fill dest with random data.

fn next_f32(&mut self) -> f32

Return the next random f32 selected from the half-open interval [0, 1).

fn next_f64(&mut self) -> f64

Return the next random f64 selected from the half-open interval [0, 1).

fn gen<T: Rand>(&mut self) -> T where
    Self: Sized, 

Return a random value of a Rand type.

Important traits for Generator<'a, T, R>

impl<'a, T: Rand, R: Rng> Iterator for Generator<'a, T, R> type Item = T;

fn gen_iter<'a, T: Rand>(&'a mut self) -> Generator<'a, T, Self> where
    Self: Sized, 

Return an iterator that will yield an infinite number of randomly generated items.

fn gen_range<T: PartialOrd + SampleRange>(&mut self, low: T, high: T) -> T where
    Self: Sized, 

Generate a random value in the range [low, high).

fn gen_weighted_bool(&mut self, n: u32) -> bool where
    Self: Sized, 

Return a bool with a 1 in n chance of true

Important traits for AsciiGenerator<'a, R>

impl<'a, R: Rng> Iterator for AsciiGenerator<'a, R> type Item = char;

fn gen_ascii_chars<'a>(&'a mut self) -> AsciiGenerator<'a, Self> where
    Self: Sized, 

Return an iterator of random characters from the set A-Z,a-z,0-9.

fn choose<'a, T>(&mut self, values: &'a [T]) -> Option<&'a T> where
    Self: Sized, 

Return a random element from values.

fn choose_mut<'a, T>(&mut self, values: &'a mut [T]) -> Option<&'a mut T> where
    Self: Sized, 

Return a mutable pointer to a random element from values.

fn shuffle<T>(&mut self, values: &mut [T]) where
    Self: Sized, 

Shuffle a mutable slice in place.

impl<S, R: SeedableRng<S>, Rsdr: Reseeder<R> + Default> SeedableRng<(Rsdr, S)> for ReseedingRng<R, Rsdr>

fn reseed(&mut self, (rsdr, seed): (Rsdr, S))

Reseed an RNG with the given seed.

fn from_seed((rsdr, seed): (Rsdr, S)) -> ReseedingRng<R, Rsdr>

Create a new ReseedingRng from the given reseeder and seed. This uses a default value for generation_threshold.

impl<R: Debug, Rsdr: Debug> Debug for ReseedingRng<R, Rsdr>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.