math::random
math::random provides a pseudorandom number generator, which yields a
deterministic sequence of psuedo-random numbers based on a seed value.
Beware! This module is NOT suitable for generating genuinely random data for
cryptographic use. See crypto::random for cryptographically secure random
number generation.
Index
Types
type random;
Functions
fn f64rand(*random) f64;
fn init(u64) random;
fn next(*random) u64;
fn u32n(*random, u32) u32;
fn u64n(*random, u64) u64;
Types
type random
type random = u64;
State for a pseudorandom number generator.
Functions
fn f64rand
fn f64rand(r: *random) f64;
Returns a pseudo-random 64-bit floating-point number in the interval
[0.0, 1.0)
fn init
fn init(seed: u64) random;
Initializes a pseudorandom number generator with a given seed. This seed will
yield the same sequence of psuedo-random numbers if used again.
fn next
fn next(r: *random) u64;
Returns a psuedo-random 64-bit unsigned integer.
fn u32n
fn u32n(r: *random, n: u32) u32;
Returns a pseudo-random 32-bit unsigned integer in the half-open interval
[0,n). n must be greater than zero.
fn u64n
fn u64n(r: *random, n: u64) u64;
Returns a pseudo-random 64-bit unsigned integer in the half-open interval
[0,n). n must be greater than zero.