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godot/thirdparty/misc/pcg.h
2020-10-29 15:41:00 +03:00

17 lines
536 B
C++

// *Really* minimal PCG32 code / (c) 2014 M.E. O'Neill / pcg-random.org
// Licensed under Apache License 2.0 (NO WARRANTY, etc. see website)
#ifndef RANDOM_H
#define RANDOM_H
#include "core/typedefs.h"
#define PCG_DEFAULT_INC_64 1442695040888963407ULL
typedef struct { uint64_t state; uint64_t inc; } pcg32_random_t;
uint32_t pcg32_random_r(pcg32_random_t* rng);
void pcg32_srandom_r(pcg32_random_t* rng, uint64_t initstate, uint64_t initseq);
uint32_t pcg32_boundedrand_r(pcg32_random_t* rng, uint32_t bound);
#endif // RANDOM_H