Struct SystemVRand 

pub struct SystemVRand { /* private fields */ }

Faithful System V / old-POSIX-style rand():

next = next * 1103515245 + 12345; return (next >> 16) & 0x7fff;

This is the classic 15-bit libc generator that many systems exposed before higher-quality interfaces were common. It is a bad RNG.

Implementations

impl SystemVRand

pub fn new(seed: u32) -> Self

pub fn next_raw(&mut self) -> u32

Trait Implementations

impl Clone for SystemVRand

fn clone(&self) -> SystemVRand

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SystemVRand

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

Formats the value using the given formatter.

impl Rng for SystemVRand

fn next_u32(&mut self) -> u32

Return the next 32-bit pseudo-random word.

fn next_u64(&mut self) -> u64

Return the next 64-bit pseudo-random word.

fn next_f64(&mut self) -> f64

Uniform float in [0, 1) built from 32 bits of the generator’s output.

fn collect_bits(&mut self, n: usize) -> Vec<u8>

Collect n bits as Vec<u8> values 0 or 1, LSB-first from each word.

fn collect_u32s(&mut self, n: usize) -> Vec<u32>

Collect n 32-bit words.

fn collect_f64s(&mut self, n: usize) -> Vec<f64>

Collect n floats in [0, 1).