3BSD/usr/include/dbm.h

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#define	PBLKSIZ	512
#define	DBLKSIZ	4096
#define	BYTESIZ	8
#define	NULL	((char *) 0)

long	bitno;
long	maxbno;
long	blkno;
long	hmask;

char	pagbuf[PBLKSIZ];
char	dirbuf[DBLKSIZ];

int	dirf;
int	pagf;

typedef	struct
{
	char	*dptr;
	int	dsize;
} datum;

datum	fetch();
datum	makdatum();
datum	firstkey();
datum	nextkey();
datum	firsthash();
long	calchash();
long	hashinc();