vita/api/random_8cc_source.html

#include "kernel/random.h"


namespace vita

{


namespace random

{


engine_t engine;


void seed(unsigned s)

{

  engine.seed(s);

}


void randomize()

{

  std::random_device rd;

  seed(rd());

}


unsigned ring(unsigned base, unsigned width, unsigned n)

{

  Expects(base < n);

  Expects(width);

  Expects(n > 1);


  if (width >= n)

    return random::between(0u, n);


  const auto min_val(base + n - width / 2);


  return (min_val + random::between(0u, width)) % n;

}


}  // namespace random

}  // namespace vita

vita::real::base
base_t base(const value_t &v)
A simple shortcut for casting an value_t to base_t.
Definition: real.h:49

vita
The main namespace for the project.

vita::random::ring
unsigned ring(unsigned base, unsigned width, unsigned n)
Returns a random number in a modular arithmetic system.
Definition: random.cc:65

vita::random::seed
void seed(unsigned s)
Initalizes the random number generator.
Definition: random.cc:42

vita::random::engine
engine_t engine
The shared random engine generator.
Definition: random.cc:27

vita::random::randomize
void randomize()
Sets the shared engine to an unpredictable state.
Definition: random.cc:50

random.h

vita::random::engine_t
vigna::xoshiro256ss engine_t
xoshiro256** (XOR/shift/rotate) is an all-purpose, rock-solid generator (not a cryptographically secu...
Definition: random.h:34