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#ifndef FC_SOLVE__RAND_H
#define FC_SOLVE__RAND_H
#ifdef __cplusplus
extern "C" {
#endif
#include "inline.h"
struct fcs_rand_struct
{
unsigned long seed;
};
typedef struct fcs_rand_struct fcs_rand_t;
extern fcs_rand_t * freecell_solver_rand_alloc(unsigned int seed);
extern void freecell_solver_rand_free(fcs_rand_t * rand);
extern void freecell_solver_rand_srand(fcs_rand_t * rand, unsigned int seed);
static GCC_INLINE int freecell_solver_rand_rand15(fcs_rand_t * rand)
{
rand->seed = (rand->seed * 214013 + 2531011);
return (rand->seed >> 16) & 0x7fff;
}
/*
*
* This function constructs a larger integral number of out of two
* 15-bit ones.
*
* */
static GCC_INLINE int freecell_solver_rand_get_random_number(fcs_rand_t * rand)
{
int one, two;
one = freecell_solver_rand_rand15(rand);
two = freecell_solver_rand_rand15(rand);
return (one | (two << 15));
}
#ifdef __cplusplus
}
#endif
#endif
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