random.h

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#ifndef LMMC_RANDOM_H
#define LMMC_RANDOM_H
 
#include "lmmc/config.h"
#include "lmmc/status.h"
#include <stddef.h>
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif

typedef struct lmmc_rng_t lmmc_rng_t;

lmmc_status_t lmmc_rng_create(lmmc_rng_t** out_rng);

lmmc_status_t lmmc_rng_seed(lmmc_rng_t* rng, uint64_t seed);
void lmmc_rng_destroy(lmmc_rng_t* rng);

lmmc_status_t lmmc_rng_clone(const lmmc_rng_t* src, lmmc_rng_t** out_rng);

lmmc_status_t lmmc_rng_jump(lmmc_rng_t* rng);

lmmc_status_t lmmc_rng_long_jump(lmmc_rng_t* rng);

uint64_t lmmc_rng_next_u64(lmmc_rng_t* rng);


lmmc_status_t lmmc_rng_uniform(
    lmmc_rng_t* rng,
    lmmc_real_t a,
    lmmc_real_t b,
    lmmc_real_t* out_value
);

lmmc_status_t lmmc_rng_normal(
    lmmc_rng_t* rng,
    lmmc_real_t mean,
    lmmc_real_t stddev,
    lmmc_real_t* out_value
);

lmmc_status_t lmmc_rng_exponential(
    lmmc_rng_t* rng,
    lmmc_real_t rate,
    lmmc_real_t* out_value
);

lmmc_status_t lmmc_rng_fill_uniform(
    lmmc_rng_t* rng,
    lmmc_real_t a,
    lmmc_real_t b,
    lmmc_real_t* array,
    size_t count
);

lmmc_status_t lmmc_rng_shuffle(
    lmmc_rng_t* rng,
    void* array,
    size_t count,
    size_t elem_size
);

lmmc_status_t lmmc_rng_gamma(
    lmmc_rng_t* rng,
    lmmc_real_t shape,
    lmmc_real_t scale,
    lmmc_real_t* out
);

lmmc_status_t lmmc_rng_beta(
    lmmc_rng_t* rng,
    lmmc_real_t alpha,
    lmmc_real_t beta_param,
    lmmc_real_t* out
);

lmmc_status_t lmmc_rng_chi_squared(
    lmmc_rng_t* rng,
    lmmc_real_t df,
    lmmc_real_t* out
);

lmmc_status_t lmmc_rng_student_t(
    lmmc_rng_t* rng,
    lmmc_real_t df,
    lmmc_real_t* out
);

lmmc_status_t lmmc_rng_f(
    lmmc_rng_t* rng,
    lmmc_real_t df1,
    lmmc_real_t df2,
    lmmc_real_t* out
);

lmmc_status_t lmmc_rng_poisson(
    lmmc_rng_t* rng,
    lmmc_real_t lambda,
    size_t* out
);

lmmc_status_t lmmc_rng_binomial(
    lmmc_rng_t* rng,
    size_t n,
    lmmc_real_t p,
    size_t* out
);

lmmc_status_t lmmc_rng_int_uniform(
    lmmc_rng_t* rng,
    int64_t lo,
    int64_t hi,
    int64_t* out
);
 
#ifdef __cplusplus
}
#endif
 
#endif