rand.h File Reference

pseudorandom number generator More...

#include "a.h"

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Data Structures
struct	a_rand_lcg48
	instance structure for the linear congruential generator and 48-bit integer arithmetic More...
struct	a_rand_pcg32
	instance structure for the permuted congruential generator and 64-bit integer arithmetic More...

Macros
#define	A_RAND_LCG48_INIT   {A_U64_C(0x5DEECE66D), A_U16_C(0xB), {A_U16_C(0x330E), A_U16_C(0xABCD), A_U16_C(0x1234)}}
#define	A_RAND_PCG32_INIT   {A_U64_C(0x5851F42D4C957F2D), A_U64_C(0xDA3E39CB94B95BDB), A_U64_C(0x853C49E6748FEA9B)}

Typedefs
typedef struct a_rand_lcg48	a_rand_lcg48
typedef struct a_rand_pcg32	a_rand_pcg32
typedef struct a_rand_lcg48	a::rand_lcg48
typedef struct a_rand_pcg32	a::rand_pcg32

Functions
void	a_rand_lcg48_init (a_rand_lcg48 *ctx, a_i64 x)
	initialize with a seed value for the linear congruential generator and 48-bit integer arithmetic.
void	a_rand_lcg48_seed (a_rand_lcg48 *ctx, a_u16 const x[3])
	initialize with a specific state for the linear congruential generator and 48-bit integer arithmetic.
a_u64	a_rand_lcg48_next (a_rand_lcg48 *ctx, a_u16 x[3])
	perform one iteration for the linear congruential generator and 48-bit integer arithmetic.
a_i32	a_rand_lcg48i (a_rand_lcg48 *ctx)
	generate a signed 32-bit random integer.
a_i32	a_rand_lcg48i_ (a_rand_lcg48 *ctx, a_u16 x[3])
	generate a signed 32-bit random integer.
a_u32	a_rand_lcg48u (a_rand_lcg48 *ctx)
	generate an unsigned 32-bit random integer.
a_u32	a_rand_lcg48u_ (a_rand_lcg48 *ctx, a_u16 x[3])
	generate an unsigned 32-bit random integer.
a_f64	a_rand_lcg48f (a_rand_lcg48 *ctx)
	generate a 64-bit floating-point random number in [0,1).
a_f64	a_rand_lcg48f_ (a_rand_lcg48 *ctx, a_u16 x[3])
	generate a 64-bit floating-point random number in [0,1).
void	a_rand_lcg48_shuf (a_rand_lcg48 *ctx, void *ptr, a_size num, a_size siz)
	shuffle the elements of an array in place using the Fisher-Yates (Knuth) shuffle algorithm.
void	a_rand_pcg32_init (a_rand_pcg32 *ctx, a_u64 x, a_u64 c)
	initialize with initial value for the permuted congruential generator and 64-bit integer arithmetic.
a_u32	a_rand_pcg32u (a_rand_pcg32 *ctx)
	generate an unsigned 32-bit random integer.
a_u32	a_rand_pcg32n (a_rand_pcg32 *ctx, a_u32 n)
	generate an unsigned 32-bit random integer in [0,n).
a_f64	a_rand_pcg32f (a_rand_pcg32 *ctx)
	generate a 64-bit floating-point random number in [0,1).
void	a_rand_pcg32_shuf (a_rand_pcg32 *ctx, void *ptr, a_size num, a_size siz)
	shuffle the elements of an array in place using the Fisher-Yates (Knuth) shuffle algorithm.

Detailed Description

pseudorandom number generator

https://en.wikipedia.org/wiki/Pseudorandom_number_generator