/* Public domain. */

#ifndef CDB_H
#define CDB_H

#include "uint32.h"

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

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 */
} ;

typedef struct cdb Cdb;

extern Cdb* cdb_new(void);

extern void cdb_clear(Cdb *);
extern void cdb_init(Cdb *,int fd);
extern void cdb_init_nomap(Cdb *,int fd);

extern int cdb_read(Cdb *,char *,unsigned int,uint32);

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

extern int cdb_write(Cdb *c,int fd);

/*extern uint32 cdb_pos();
extern uint32 cdb_len();*/
#define cdb_pos(c) ((c)->dpos)
#define cdb_len(c) ((c)->dlen)

/*extern char *cdb_mmap();
extern uint32 cdb_msize();*/
#define cdb_mmap(c) ((c)->map)
#define cdb_msize(c) ((c)->size)

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

#endif