/* nied63.h: Niederreiter QMC sample series (dimension 4, base 2, 
 * 63 bits, skip 4096) */

#ifndef _NIED63_H_
#define _NIED63_H_

#ifdef _NIED31_H_
#error "nied63.h and nied31.h cannot be included in the same source file"
#endif

#ifndef NOINT64
/* All this makes no sense if you don't have 64-bit integers */

#ifdef __cplusplus
extern "C" {
#endif

#define SKIP 4096	/* number of samples to be skipped from the beginning of the
			 * series in order to deal with the "initial zeroes" phenomenon */
#define DIMEN 4		/* dimension of the samples generated. */
#define NBITS 63	/* number of bits in an integer, excluding the sign bit */
#define RECIP (1./9223372036854775808.)   /* 1 / 2^NBITS */
#define RECIP1 9223372036854775808.       /* 2^NBITS */

#define NBITS_POW  (1uLL<<NBITS)          /* 2^NBITS */
#define NBITS_POW1 (1uLL<<(NBITS-1))      /* 2^(NBITS-1) */

#define Nied Nied63
#define NextNiedInRange NextNiedInRange63
#define RadicalInverse RadicalInverse63
#define FoldSample FoldSample63
#define niedindex unsigned long long

extern unsigned long long *Nied63(unsigned long long index);

extern unsigned long long *NextNiedInRange63(unsigned long long *idx, int dir,
					     int nmsb,
					     unsigned long long msb1,
					     unsigned long long rmsb2);

extern unsigned long long RadicalInverse63(unsigned long long n);

extern void FoldSample63(unsigned long long *xi1, unsigned long long *xi2);

#endif /*NOINT64*/

#ifdef __cplusplus
}
#endif

#endif /*_NIEDERREITER_H_*/