#ifndef _APUE_DB_H#define _APUE_DB_Htypedef	void *	DBHANDLE;DBHANDLE  db_open(const char *, int, ...);void      db_close(DBHANDLE);char     *db_fetch(DBHANDLE, const char *);int       db_store(DBHANDLE, const char *, const char *, int);int       db_delete(DBHANDLE, const char *);void      db_rewind(DBHANDLE);char     *db_nextrec(DBHANDLE, char *);/* * Flags for db_store(). */#define DB_INSERT	   1	/* insert new record only */#define DB_REPLACE	   2	/* replace existing record */#define DB_STORE	   3	/* replace or insert *//* * Implementation limits. */#define IDXLEN_MIN	   6	/* key, sep, start, sep, length, \n */#define IDXLEN_MAX	1024	/* arbitrary */#define DATLEN_MIN	   2	/* data byte, newline */#define DATLEN_MAX	1024	/* arbitrary */#endif /* _APUE_DB_H */