Struct bc_crypto::SeededRandomNumberGenerator

pub struct SeededRandomNumberGenerator { /* private fields */ }

A random number generator that can be used as a source of deterministic pseudo-randomness for testing purposes.

Implementations

impl SeededRandomNumberGenerator

pub fn new(seed: [u64; 4]) -> Self

Creates a new seeded random number generator.

The seed should be a 256-bit value, represented as an array of 4 64-bit integers. For the output distribution to look random, the seed should not have any obvious patterns, like all zeroes or all ones.

This is not cryptographically secure, and should only be used for testing purposes.

pub fn next_u64(&mut self) -> u64

Trait Implementations

impl RandomNumberGenerator for SeededRandomNumberGenerator

fn next_u64(&mut self) -> u64

Returns the next random u64.

fn random_data(&mut self, size: usize) -> Vec<u8>

Returns a vector of random bytes of the given size.

fn fill_random_data(&mut self, data: &mut [u8])

Fills the given buffer with random bytes.

fn next_with_upper_bound<T>(&mut self, upper_bound: T) -> Twhere T: PrimInt + Unsigned + NumCast + FromPrimitive + AsPrimitive<u128> + OverflowingMul + Shl<usize, Output = T> + Shr<usize, Output = T> + WrappingSub + OverflowingAdd + Widening,

Returns a random value that is less than the given upper bound.

fn next_in_range<T>(&mut self, range: &Range<T>) -> Twhere T: PrimInt + FromPrimitive + AsPrimitive<u128> + OverflowingMul + Shl<usize, Output = T> + Shr<usize, Output = T> + HasMagnitude + OverflowingAdd,

Returns a random value within the specified range, using the given generator as a source for randomness.

fn next_in_closed_range<T>(&mut self, range: &RangeInclusive<T>) -> Twhere T: PrimInt + FromPrimitive + AsPrimitive<u128> + OverflowingMul + Shl<usize, Output = T> + Shr<usize, Output = T> + HasMagnitude,