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Annotation of 43BSDReno/include/ndbm.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)ndbm.h      5.3 (Berkeley) 5/29/90
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * Hashed key data base library.
        !            11:  */
        !            12: #define PBLKSIZ 1024
        !            13: #define DBLKSIZ 4096
        !            14: 
        !            15: typedef struct {
        !            16:        int     dbm_dirf;               /* open directory file */
        !            17:        int     dbm_pagf;               /* open page file */
        !            18:        int     dbm_flags;              /* flags, see below */
        !            19:        long    dbm_maxbno;             /* last ``bit'' in dir file */
        !            20:        long    dbm_bitno;              /* current bit number */
        !            21:        long    dbm_hmask;              /* hash mask */
        !            22:        long    dbm_blkptr;             /* current block for dbm_nextkey */
        !            23:        int     dbm_keyptr;             /* current key for dbm_nextkey */
        !            24:        long    dbm_blkno;              /* current page to read/write */
        !            25:        long    dbm_pagbno;             /* current page in pagbuf */
        !            26:        char    dbm_pagbuf[PBLKSIZ];    /* page file block buffer */
        !            27:        long    dbm_dirbno;             /* current block in dirbuf */
        !            28:        char    dbm_dirbuf[DBLKSIZ];    /* directory file block buffer */
        !            29: } DBM;
        !            30: 
        !            31: #define _DBM_RDONLY    0x1     /* data base open read-only */
        !            32: #define _DBM_IOERR     0x2     /* data base I/O error */
        !            33: 
        !            34: #define dbm_rdonly(db) ((db)->dbm_flags & _DBM_RDONLY)
        !            35: 
        !            36: #define dbm_error(db)  ((db)->dbm_flags & _DBM_IOERR)
        !            37:        /* use this one at your own risk! */
        !            38: #define dbm_clearerr(db)       ((db)->dbm_flags &= ~_DBM_IOERR)
        !            39: 
        !            40: /* for flock(2) and fstat(2) */
        !            41: #define dbm_dirfno(db) ((db)->dbm_dirf)
        !            42: #define dbm_pagfno(db) ((db)->dbm_pagf)
        !            43: 
        !            44: typedef struct {
        !            45:        char    *dptr;
        !            46:        int     dsize;
        !            47: } datum;
        !            48: 
        !            49: /*
        !            50:  * flags to dbm_store()
        !            51:  */
        !            52: #define DBM_INSERT     0
        !            53: #define DBM_REPLACE    1
        !            54: 
        !            55: #if __STDC__ || c_plusplus
        !            56: extern DBM *dbm_open(const char *, int, int);
        !            57: extern void dbm_close(DBM *);
        !            58: extern datum dbm_fetch(DBM *, datum);
        !            59: extern datum dbm_firstkey(DBM *);
        !            60: extern datum dbm_nextkey(DBM *);
        !            61: extern long dbm_forder(DBM *, datum);
        !            62: extern int dbm_delete(DBM *, datum);
        !            63: extern int dbm_store(DBM *, datum, datum, int);
        !            64: #else
        !            65: extern DBM *dbm_open();
        !            66: extern void dbm_close();
        !            67: extern datum dbm_fetch();
        !            68: extern datum dbm_firstkey();
        !            69: extern datum dbm_nextkey();
        !            70: extern long dbm_forder();
        !            71: extern int dbm_delete();
        !            72: extern int dbm_store();
        !            73: #endif

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