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/*
* Copyright (c) 1985 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)dbm.c 5.4 (Berkeley) 5/24/89";
#endif /* not lint */
#include "dbm.h"
#define NODB ((DBM *)0)
static DBM *cur_db = NODB;
static char no_db[] = "dbm: no open database\n";
int
dbminit(char *file)
{
if (cur_db != NODB)
dbm_close(cur_db);
cur_db = dbm_open(file, 2, 0);
if (cur_db == NODB) {
cur_db = dbm_open(file, 0, 0);
if (cur_db == NODB)
return (-1);
}
return (0);
}
long
forder(datum key)
{
if (cur_db == NODB) {
printf(no_db);
return (0L);
}
return (dbm_forder(cur_db, key));
}
datum
fetch(datum key)
{
datum item;
if (cur_db == NODB) {
printf(no_db);
item.dptr = 0;
return (item);
}
return (dbm_fetch(cur_db, key));
}
int
delete(datum key)
{
if (cur_db == NODB) {
printf(no_db);
return (-1);
}
if (dbm_rdonly(cur_db))
return (-1);
return (dbm_delete(cur_db, key));
}
int
store(datum key, datum dat)
{
if (cur_db == NODB) {
printf(no_db);
return (-1);
}
if (dbm_rdonly(cur_db))
return (-1);
return (dbm_store(cur_db, key, dat, DBM_REPLACE));
}
datum
firstkey(void)
{
datum item;
if (cur_db == NODB) {
printf(no_db);
item.dptr = 0;
return (item);
}
return (dbm_firstkey(cur_db));
}
datum
nextkey(datum key)
{
datum item;
if (cur_db == NODB) {
printf(no_db);
item.dptr = 0;
return (item);
}
return (dbm_nextkey(cur_db, key));
}
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