#ifndef __ISD_HPP
#define __ISD_HPP

struct ISD;

#define OD_ACCESS_READ                  0x0000
#define OD_ACCESS_UPDATE                0x0001
#define OD_FAIL_IF_EXISTS               0x0000
#define OD_REPLACE_IF_EXISTS            0x0010
#define OD_OPEN_IF_EXISTS               0x0020
#define OD_FAIL_IF_NOT_EXISTS           0x0000
#define OD_CREATE_IF_NOT_EXISTS         0x0100

ISD *Open(const char *dbname,
          int flags,
          int blocksize
         );

int Close(ISD *isd);

int CanFind(ISD *isd, const void *key, int keylen);

int Read(ISD *isd, const void *key, int keylen, void *data, int datalen);

int Write(ISD *isd, const void *key, int keylen, const void *data, int datalen, int replace);

int Delete(ISD *isd, const void *key, int keylen);

int Flush(ISD *isd);

int FirstKey(ISD *isd, void *key, int *keylen);
int NextKey(ISD *isd, const void *okey, int okeylen, void *nkey, int *nkeylen);

#endif