InsecureRandomContext

xoroshiro128++ PRNG. Extremely fast, not appropriate for cryptographic purposes.

Synopsis

Declared in <random.h>

class InsecureRandomContext
    : public RandomMixin<InsecureRandomContext>

Description

Memory footprint is very small, period is 2ˆ128 ‐ 1. This class is not thread‐safe.

Reference implementation available at https://prng.di.unimi.it/xoroshiro128plusplus.c See https://prng.di.unimi.it/

Base Classes

Name

Description

RandomMixin<InsecureRandomContext>

Mixin class that provides helper randomness functions.

Type Aliases

Name

Description

result_type

Result type of the generator, for the UniformRandomBitGenerator concept.

Member Functions

Name

Description

InsecureRandomContext [constructor]

Construct the context, deriving the initial state from a seed value.

operator=

Assignment operators

Reseed

Reset the context to a new state derived from a seed value.

fillrand

Fill a span with random bytes.

operator()

Generate the next random value, for the UniformRandomBitGenerator concept.

rand

Generate a random integer in its entire (non‐negative) range.

rand256

generate a random uint256.

rand32

Generate a random 32‐bit integer.

rand64

Generate a random 64‐bit integer.

rand_exp_duration

Return a duration sampled from an exponential distribution (https://en.wikipedia.org/wiki/Exponential_distribution). Successive events whose intervals are distributed according to this form a memoryless Poisson process. This should be used for repeated network events (e.g. sending a certain type of message) to minimize leaking information to observers.

rand_uniform_delay

Return the time point advanced by a uniform random duration.

rand_uniform_duration

Generate a uniform random duration in the range from 0 (inclusive) to range (exclusive).

randbits

randbits overloads

randbool

Generate a random boolean.

randbytes

randbytes overloads

randrange

randrange overloads