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/* MIT License - Copyright (c) 2025 wallstop
* Original C# implementation from: https://github.com/wallstop/unity-helpers
* Converted to C for librandom project
*/
#ifndef XORSHIFT_RANDOM_H
#define XORSHIFT_RANDOM_H
#include <stdint.h>
#include <stdbool.h>
/* XorShift: A classic, extremely fast PRNG with small state and modest quality.
*
* XorShift generators are known for their simplicity and speed. This variant
* operates on a 32-bit state and produces 32-bit outputs.
*
* Pros:
* - Very fast; tiny state footprint
* - Deterministic and easy to serialize/restore
*
* Cons:
* - Lower statistical quality than newer generators
* - Not cryptographically secure
*/
#define XORSHIFT_DEFAULT_STATE 2463534242U
typedef struct {
uint32_t state;
} xorshift_random_t;
/* Initialize the generator with a seed */
void xorshift_init(xorshift_random_t *rng, uint32_t seed);
/* Generate next random 32-bit unsigned integer */
uint32_t xorshift_next_uint(xorshift_random_t *rng);
/* Generate next random float in [0, 1) */
float xorshift_next_float(xorshift_random_t *rng);
/* Generate next random double in [0, 1) */
double xorshift_next_double(xorshift_random_t *rng);
#endif /* XORSHIFT_RANDOM_H */
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