/* Public domain. */

#ifndef CDB_H
#define CDB_H

#include "uint_t.h"

#define CDB_HASHSTART 5381ULL
extern uint32 cdb_hashadd(uint32, unsigned char);
extern uint32 cdb_hash(char *, unsigned int);
extern uint32 cdb_unpack(unsigned char *);

struct cdb {
  char *map; /* 0 if no map is available */
  int fd;
  uint32 size;   /* initialized if map is nonzero */
  uint32 loop;   /* number of hash slots searched under this key */
  uint32 khash;  /* initialized if loop is nonzero */
  uint32 kpos;   /* initialized if loop is nonzero */
  uint32 hpos;   /* initialized if loop is nonzero */
  uint32 hslots; /* initialized if loop is nonzero */
  uint32 dpos;   /* initialized if cdb_findnext() returns 1 */
  uint32 dlen;   /* initialized if cdb_findnext() returns 1 */
};

extern void cdb_free(struct cdb *);
extern void cdb_init(struct cdb *, int fd);

extern int cdb_read(struct cdb *, char *, unsigned int, uint32);

extern void cdb_findstart(struct cdb *);
extern int cdb_findnext(struct cdb *, char *, unsigned int);
extern int cdb_find(struct cdb *, char *, unsigned int);

#define cdb_datapos(c) ((c)->dpos)
#define cdb_datalen(c) ((c)->dlen)

#endif