Differential D23290 Diff 67637 head/lib/libc/stdlib/random.h

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head/lib/libc/stdlib/random.h

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	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.			* SUCH DAMAGE.
	*			*
	* $FreeBSD$			* $FreeBSD$
	*/			*/

	#pragma once			#pragma once

				/*
				* For each of the currently supported random number generators, we have a
				* break value on the amount of state information (you need at least this
				* many bytes of state info to support this random number generator), a degree
				* for the polynomial (actually a trinomial) that the R.N.G. is based on, and
				* the separation between the two lower order coefficients of the trinomial.
				*/
				#define TYPE_0 0 /* linear congruential */
				#define BREAK_0 8
				#define DEG_0 0
				#define SEP_0 0

				#define TYPE_1 1 /* x7 + x3 + 1 */
				#define BREAK_1 32
				#define DEG_1 7
				#define SEP_1 3

				#define TYPE_2 2 /* x*15 + x + 1 /
				#define BREAK_2 64
				#define DEG_2 15
				#define SEP_2 1

				#define TYPE_3 3 /* x31 + x3 + 1 */
				#define BREAK_3 128
				#define DEG_3 31
				#define SEP_3 3

				#define TYPE_4 4 /* x*63 + x + 1 /
				#define BREAK_4 256
				#define DEG_4 63
				#define SEP_4 1

				/*
				* Array versions of the above information to make code run faster --
				* relies on fact that TYPE_i == i.
				*/
				#define MAX_TYPES 5 /* max number of types above */

	/* A full instance of the random(3) generator. */			/* A full instance of the random(3) generator. */
	struct __random_state {			struct __random_state {
	uint32_t *rst_fptr;			uint32_t *rst_fptr;
	uint32_t *rst_rptr;			uint32_t *rst_rptr;
	uint32_t *rst_state;			uint32_t *rst_state;
	int rst_type;			int rst_type;
	int rst_deg;			int rst_deg;
	int rst_sep;			int rst_sep;
	uint32_t *rst_end_ptr;			uint32_t *rst_end_ptr;
	/* Flexible array member must be last. */			/* Flexible array member must be last. */
	uint32_t rst_randtbl[];			uint32_t rst_randtbl[];
	};			};

				struct __random_state *allocatestate(unsigned type);
	int initstate_r(struct __random_state , unsigned, uint32_t , size_t);			int initstate_r(struct __random_state , unsigned, uint32_t , size_t);
	long random_r(struct __random_state *);			long random_r(struct __random_state *);
	void srandom_r(struct __random_state *, unsigned);			void srandom_r(struct __random_state *, unsigned);
	void srandomdev_r(struct __random_state *);			void srandomdev_r(struct __random_state *);