d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#pragma ident "%Z%%M% %I% %E% SMI"
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck/*
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck * Copyright (c) 1983 Regents of the University of California.
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck * All rights reserved. The Berkeley software License Agreement
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck * specifies the terms and conditions for redistribution.
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck *
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck/*
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck * Hashed key data base library.
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#ifndef _ndbm_h
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#define _ndbm_h
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#define PBLKSIZ 1024
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#define DBLKSIZ 4096
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
d71dbb732372504daff1f1783bc0d8864ce9bd50jbecktypedef struct {
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck int dbm_dirf; /* open directory file */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck int dbm_pagf; /* open page file */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck int dbm_flags; /* flags, see below */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey long dbm_maxbno; /* last ``bit'' in dir file */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck long dbm_bitno; /* current bit number */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck long dbm_hmask; /* hash mask */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck long dbm_blkptr; /* current block for dbm_nextkey */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck int dbm_keyptr; /* current key for dbm_nextkey */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey long dbm_blkno; /* current page to read/write */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey long dbm_pagbno; /* current page in pagbuf */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck char dbm_pagbuf[PBLKSIZ]; /* page file block buffer */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck long dbm_dirbno; /* current block in dirbuf */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey char dbm_dirbuf[DBLKSIZ]; /* directory file block buffer */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey} DBM;
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#define _DBM_RDONLY 0x1 /* data base open read-only */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey#define _DBM_IOERR 0x2 /* data base I/O error */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey#define dbm_rdonly(db) ((db)->dbm_flags & _DBM_RDONLY)
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey#define dbm_error(db) ((db)->dbm_flags & _DBM_IOERR)
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey /* use this one at your own risk! */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey#define dbm_clearerr(db) ((db)->dbm_flags &= ~_DBM_IOERR)
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey/* for flock(2) and fstat(2) */
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey#define dbm_dirfno(db) ((db)->dbm_dirf)
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#define dbm_pagfno(db) ((db)->dbm_pagf)
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
d71dbb732372504daff1f1783bc0d8864ce9bd50jbecktypedef struct {
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck char *dptr;
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey int dsize;
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck} datum;
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey/*
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey * flags to dbm_store()
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey */
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#define DBM_INSERT 0
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck#define DBM_REPLACE 1
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeck
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. MaskeyDBM *dbm_open();
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskeyvoid dbm_close();
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeckdatum dbm_fetch();
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeckdatum dbm_firstkey();
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskeydatum dbm_nextkey();
d71dbb732372504daff1f1783bc0d8864ce9bd50jbeckdatum dbm_do_nextkey();
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskeylong dbm_forder();
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskeyint dbm_delete();
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskeyint dbm_store();
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey#endif /*!_ndbm_h*/
6ba597c56d749c61b4f783157f63196d7b2445f0Anurag S. Maskey