prand.h

Go to the documentation of this file.

#pragma once
 
 
#include <inttypes.h>
#include <stdbool.h>
 
typedef struct{
    uint64_t state_size;
    uint32_t (*get_u32)(void*);
    bool (*fixup_state)(void*);
    char state[];
} cr8r_prng;
 
bool cr8r_prng_seed(cr8r_prng*, uint64_t);
 
uint32_t cr8r_prng_get_u32(cr8r_prng*);
 
uint64_t cr8r_prng_get_u64(cr8r_prng*);
 
void cr8r_prng_get_bytes(cr8r_prng*, uint64_t size, void *buf);
 
uint64_t cr8r_prng_uniform_u64(cr8r_prng*, uint64_t a, uint64_t b);
 
double cr8r_prng_uniform01_double(cr8r_prng*);
 
uint64_t cr8r_prng_log_mod_t64(uint64_t h);
 
extern const uint64_t cr8r_prng_2tg_t64[4];
 
// these constants are taken from the standard MT19937-64 generator configuration
#define CR8R_PRNG_MT_N 312
#define CR8R_PRNG_MT_M 156
#define CR8R_PRNG_MT_R 31
#define CR8R_PRNG_MT_A 0xB5026F5AA96619E9
#define CR8R_PRNG_MT_U 29
#define CR8R_PRNG_MT_D 0x5555555555555555
#define CR8R_PRNG_MT_S 17
#define CR8R_PRNG_MT_B 0x71D67FFFEDA60000
#define CR8R_PRNG_MT_T 37
#define CR8R_PRNG_MT_C 0xFFF7EEE000000000
#define CR8R_PRNG_MT_L 43
#define CR8R_PRNG_MT_F 6364136223846793005
 
#define CR8R_PRNG_LFM_R 127
#define CR8R_PRNG_LFM_S 97
 
#define CR8R_DEFAULT_PRNG_SM_SEED 0xd20499955ff0e57c
 
#define CR8R_DEFAULT_PRNG_LCG_SEED 0xe9352d1427990d8e
 
cr8r_prng *cr8r_prng_init_system();
 
cr8r_prng *cr8r_prng_init_lcg(uint64_t seed);
 
cr8r_prng *cr8r_prng_init_lfg_sc(uint64_t seed);
 
cr8r_prng *cr8r_prng_init_lfg_m(uint64_t seed);
 
cr8r_prng *cr8r_prng_init_mt(uint64_t seed);
 
cr8r_prng *cr8r_prng_init_xoro(uint64_t seed);
 
cr8r_prng *cr8r_prng_init_splitmix(uint64_t seed);
 
extern cr8r_prng *cr8r_default_prng_splitmix;
 
void cr8r_prng_xoro_jump_t128(cr8r_prng*);
 
void cr8r_prng_xoro_jump_t192(cr8r_prng*);