bn::seed_random class
#include <bn_seed_random.h>

Deterministic random number generator with a public, configurable seed.

See https://github.com/velipso/whisky

Constructors, destructors, conversion operators

seed_random() defaulted constexpr
Default constructor.
seed_random(unsigned seed) explicit constexpr
Constructor.

Public functions

auto seed() const -> unsigned constexpr
Returns the value of the seed used to generate random numbers.
void set_seed(unsigned seed) constexpr
Sets the value of the seed used to generate random numbers.
auto get() -> unsigned constexpr
Returns a random unsigned integer greater or equal than 0, updating its seed in the process.
auto get_int() -> int constexpr
Returns a random signed integer greater or equal than 0, updating its seed in the process.
auto get_fixed() -> fixed constexpr
Returns a random bn::fixed greater or equal than 0, updating its seed in the process.
auto get_int(int limit) -> int constexpr
Returns a random signed integer in the range [0..limit), updating its internal seed in the process.
auto get_fixed(fixed limit) -> fixed constexpr
Returns a random bn::fixed in the range [0..limit), updating its internal seed in the process.
auto get_int(int minimum, int limit) -> int constexpr
Returns a random signed integer in the range [minimum..limit), updating its internal seed in the process.
auto get_fixed(fixed minimum, fixed limit) -> fixed constexpr
Returns a random bn::fixed in the range [minimum..limit), updating its internal seed in the process.
auto get_unbiased_int(int limit) -> int constexpr
Returns a random signed integer in the range [0..limit), updating its internal seed in the process.
auto get_unbiased_fixed(fixed limit) -> fixed constexpr
Returns a random bn::fixed in the range [0..limit), updating its internal seed in the process.
auto get_unbiased_int(int minimum, int limit) -> int constexpr
Returns a random signed integer in the range [minimum..limit), updating its internal seed in the process.
auto get_unbiased_fixed(fixed minimum, fixed limit) -> fixed constexpr
Returns a random bn::fixed in the range [minimum..limit), updating its internal seed in the process.
void update() constexpr
Updates the value of the seed.

Function documentation

bn::seed_random::seed_random(unsigned seed) explicit constexpr

Constructor.

Parameters
seed Initial value of the seed used to generate random numbers.

int bn::seed_random::get_int(int limit) constexpr

Returns a random signed integer in the range [0..limit), updating its internal seed in the process.

Parameters
limit Returned value is lower than this value.
Returns Random signed integer in the range [0..limit).

It's possible that the output will be biased towards smaller numbers due to modulo bias.

seed_random::get_unbiased_int can be used to avoid modulo bias.

fixed bn::seed_random::get_fixed(fixed limit) constexpr

Returns a random bn::fixed in the range [0..limit), updating its internal seed in the process.

Parameters
limit Returned value is lower than this value.
Returns Random bn::fixed in the range [0..limit).

It's possible that the output will be biased towards smaller numbers due to modulo bias.

seed_random::get_unbiased_fixed can be used to avoid modulo bias.

int bn::seed_random::get_int(int minimum, int limit) constexpr

Returns a random signed integer in the range [minimum..limit), updating its internal seed in the process.

Parameters
minimum Returned value is greater or equal than this value.
limit Returned value is lower than this value.
Returns Random signed integer in the range [minimum..limit).

It's possible that the output will be biased towards smaller numbers due to modulo bias.

seed_random::get_unbiased_int can be used to avoid modulo bias.

fixed bn::seed_random::get_fixed(fixed minimum, fixed limit) constexpr

Returns a random bn::fixed in the range [minimum..limit), updating its internal seed in the process.

Parameters
minimum Returned value is greater or equal than this value.
limit Returned value is lower than this value.
Returns Random bn::fixed in the range [minimum..limit).

It's possible that the output will be biased towards smaller numbers due to modulo bias.

seed_random::get_unbiased_fixed can be used to avoid modulo bias.

int bn::seed_random::get_unbiased_int(int limit) constexpr

Returns a random signed integer in the range [0..limit), updating its internal seed in the process.

Parameters
limit Returned value is lower than this value.
Returns Random signed integer in the range [0..limit).

This implementation avoids modulo bias, so it's less likely that the output will be biased towards smaller numbers.

fixed bn::seed_random::get_unbiased_fixed(fixed limit) constexpr

Returns a random bn::fixed in the range [0..limit), updating its internal seed in the process.

Parameters
limit Returned value is lower than this value.
Returns Random bn::fixed in the range [0..limit).

This implementation avoids modulo bias, so it's less likely that the output will be biased towards smaller numbers.

int bn::seed_random::get_unbiased_int(int minimum, int limit) constexpr

Returns a random signed integer in the range [minimum..limit), updating its internal seed in the process.

Parameters
minimum Returned value is greater or equal than this value.
limit Returned value is lower than this value.
Returns Random signed integer in the range [minimum..limit).

This implementation avoids modulo bias, so it's less likely that the output will be biased towards smaller numbers.

fixed bn::seed_random::get_unbiased_fixed(fixed minimum, fixed limit) constexpr

Returns a random bn::fixed in the range [minimum..limit), updating its internal seed in the process.

Parameters
minimum Returned value is greater or equal than this value.
limit Returned value is lower than this value.
Returns Random bn::fixed in the range [minimum..limit).

This implementation avoids modulo bias, so it's less likely that the output will be biased towards smaller numbers.