random.h

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/* BSD 3-Clause License
 *
 * Copyright © 2008-2025, Jice and the libtcod contributors.
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 *    and/or other materials provided with the distribution.
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#pragma once
#ifndef LIBTCOD_RANDOM_H_
#define LIBTCOD_RANDOM_H_
#include <stdint.h>
 
#include "config.h"
 
#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus
static inline uint64_t TCOD_rng_splitmix64_next(uint64_t* state) {
  // Based on http://xoshiro.di.unimi.it/splitmix64.c
  uint64_t z = (*state += 0x9e3779b97f4a7c15);
  z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9;
  z = (z ^ (z >> 27)) * 0x94d049bb133111eb;
  return z ^ (z >> 31);
}
#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus
#endif  // LIBTCOD_RANDOM_H_