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#ifndef BGLIBS__SURFRAND__H__
#define BGLIBS__SURFRAND__H__
#include "surf.h"
/** \defgroup surfrand surfrand: Random number generator based on SURF
@{ */
/** The surfrand state structure */
struct surfrand
{
/** counts the number of bytes in \c generated that have been output
* already */
unsigned left;
/** temporary storage for the generated random data */
uint32 generated[SURF_OUT_U32];
/** the input seed data */
uint32 seed[SURF_SEED_U32];
/** a giant counter used as input to SURF */
uint32 counter[SURF_IN_U32];
};
void surfrand_init(struct surfrand* c, const uint32* data, unsigned words);
uint32 surfrand_uint32(struct surfrand* c);
double surfrand_double(struct surfrand* c);
void surfrand_fill(struct surfrand* c, unsigned char* buf, unsigned len);
uint32 surfrand_uniform(struct surfrand* c, uint32 bound);
/** @} */
#endif
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