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ndbm.h
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#ifndef NDBM_H
#define NDBM_H
/****************************************
* Computer Algebra System SINGULAR *
****************************************/
/*
* ABSTRACT: DBM
*/
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ndbm.h 5.1 (Berkeley) 5/30/85
*
* Par. 3 removed due to a license change (1999)
* see ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
*/
/*
* Hashed key data base library.
*/
#define PBLKSIZ 1024
#define DBLKSIZ 4096
typedef struct {
int dbm_dirf; /* open directory file */
int dbm_pagf; /* open page file */
int dbm_flags; /* flags, see below */
long dbm_maxbno; /* last ``bit'' in dir file */
long dbm_bitno; /* current bit number */
long dbm_hmask; /* hash mask */
long dbm_blkptr; /* current block for dbm_nextkey */
int dbm_keyptr; /* current key for dbm_nextkey */
long dbm_blkno; /* current page to read/write */
long dbm_pagbno; /* current page in pagbuf */
char dbm_pagbuf[PBLKSIZ]; /* page file block buffer */
long dbm_dirbno; /* current block in dirbuf */
char dbm_dirbuf[DBLKSIZ]; /* directory file block buffer */
} DBM;
#define _DBM_RDONLY 0x01 /* data base open read-only */
#define _DBM_IOERR 0x02 /* data base I/O error */
#define dbm_rdonly(db) ((db)->dbm_flags & _DBM_RDONLY)
#define dbm_error(db) ((db)->dbm_flags & _DBM_IOERR)
/* use this one at your own risk! */
#define dbm_clearerr(db) ((db)->dbm_flags &= ~_DBM_IOERR)
/* for flock(2) and fstat(2) */
#define dbm_dirfno(db) ((db)->dbm_dirf)
#define dbm_pagfno(db) ((db)->dbm_pagf)
typedef struct {
char *dptr;
int dsize;
} datum;
/*
* flags to dbm_store()
*/
#define DBM_INSERT 0
#define DBM_REPLACE 1
DBM *dbm_open(char *file, int flags, int mode);
void dbm_close(DBM *db);
datum dbm_fetch(DBM *db, datum key);
datum dbm_firstkey(DBM *db);
datum dbm_nextkey(DBM *db);
long dbm_forder(DBM *db, datum key);
int dbm_delete(DBM *db, datum key);
int dbm_store(DBM *db, datum key, datum dat, int replace);
#endif /* NDBM_H */
dbm_store
int dbm_store(DBM *db, datum key, datum dat, int replace)
Definition ndbm.cc:167
datum::dptr
char * dptr
Definition ndbm.h:84
DBM::dbm_dirbuf
char dbm_dirbuf[DBLKSIZ]
Definition ndbm.h:67
dbm_fetch
datum dbm_fetch(DBM *db, datum key)
Definition ndbm.cc:119
dbm_delete
int dbm_delete(DBM *db, datum key)
Definition ndbm.cc:139
DBM::dbm_keyptr
int dbm_keyptr
Definition ndbm.h:62
DBM::dbm_pagbno
long dbm_pagbno
Definition ndbm.h:64
DBM::dbm_hmask
long dbm_hmask
Definition ndbm.h:60
DBM::dbm_pagf
int dbm_pagf
Definition ndbm.h:56
dbm_nextkey
datum dbm_nextkey(DBM *db)
Definition ndbm.cc:260
DBM::dbm_flags
int dbm_flags
Definition ndbm.h:57
dbm_firstkey
datum dbm_firstkey(DBM *db)
Definition ndbm.cc:252
datum::dsize
int dsize
Definition ndbm.h:85
DBM::dbm_maxbno
long dbm_maxbno
Definition ndbm.h:58
dbm_open
DBM * dbm_open(char *file, int flags, int mode)
Definition ndbm.cc:59
DBM::dbm_dirbno
long dbm_dirbno
Definition ndbm.h:66
DBM::dbm_dirf
int dbm_dirf
Definition ndbm.h:55
dbm_forder
long dbm_forder(DBM *db, datum key)
Definition ndbm.cc:104
DBM::dbm_blkno
long dbm_blkno
Definition ndbm.h:63
dbm_close
void dbm_close(DBM *db)
Definition ndbm.cc:97
PBLKSIZ
#define PBLKSIZ
Definition ndbm.h:50
DBM::dbm_pagbuf
char dbm_pagbuf[PBLKSIZ]
Definition ndbm.h:65
DBM::dbm_bitno
long dbm_bitno
Definition ndbm.h:59
DBLKSIZ
#define DBLKSIZ
Definition ndbm.h:52
DBM::dbm_blkptr
long dbm_blkptr
Definition ndbm.h:61
DBM
Definition ndbm.h:54
datum
Definition ndbm.h:83
flags
int status int void size_t count const char int flags
Definition si_signals.h:83