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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1999-2004
* Sleepycat Software. All rights reserved.
*
* $Id: hash_method.c,v 11.17 2004/01/28 03:36:11 bostic Exp $
*/
#include "db_config.h"
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#endif
#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc/hash.h"
static int __ham_set_h_ffactor __P((DB *, u_int32_t));
static int __ham_set_h_hash
__P((DB *, u_int32_t(*)(DB *, const void *, u_int32_t)));
static int __ham_set_h_nelem __P((DB *, u_int32_t));
/*
* __ham_db_create --
* Hash specific initialization of the DB structure.
*
* PUBLIC: int __ham_db_create __P((DB *));
*/
int
__ham_db_create(dbp)
DB *dbp;
{
HASH *hashp;
int ret;
if ((ret = __os_malloc(dbp->dbenv,
sizeof(HASH), &dbp->h_internal)) != 0)
return (ret);
hashp = dbp->h_internal;
hashp->h_nelem = 0; /* Defaults. */
hashp->h_ffactor = 0;
hashp->h_hash = NULL;
dbp->get_h_ffactor = __ham_get_h_ffactor;
dbp->set_h_ffactor = __ham_set_h_ffactor;
dbp->set_h_hash = __ham_set_h_hash;
dbp->get_h_nelem = __ham_get_h_nelem;
dbp->set_h_nelem = __ham_set_h_nelem;
return (0);
}
/*
* PUBLIC: int __ham_db_close __P((DB *));
*/
int
__ham_db_close(dbp)
DB *dbp;
{
if (dbp->h_internal == NULL)
return (0);
__os_free(dbp->dbenv, dbp->h_internal);
dbp->h_internal = NULL;
return (0);
}
/*
* __ham_get_h_ffactor --
*
* PUBLIC: int __ham_get_h_ffactor __P((DB *, u_int32_t *));
*/
int
__ham_get_h_ffactor(dbp, h_ffactorp)
DB *dbp;
u_int32_t *h_ffactorp;
{
HASH *hashp;
hashp = dbp->h_internal;
*h_ffactorp = hashp->h_ffactor;
return (0);
}
/*
* __ham_set_h_ffactor --
* Set the fill factor.
*/
static int
__ham_set_h_ffactor(dbp, h_ffactor)
DB *dbp;
u_int32_t h_ffactor;
{
HASH *hashp;
DB_ILLEGAL_AFTER_OPEN(dbp, "DB->set_h_ffactor");
DB_ILLEGAL_METHOD(dbp, DB_OK_HASH);
hashp = dbp->h_internal;
hashp->h_ffactor = h_ffactor;
return (0);
}
/*
* __ham_set_h_hash --
* Set the hash function.
*/
static int
__ham_set_h_hash(dbp, func)
DB *dbp;
u_int32_t (*func) __P((DB *, const void *, u_int32_t));
{
HASH *hashp;
DB_ILLEGAL_AFTER_OPEN(dbp, "DB->set_h_hash");
DB_ILLEGAL_METHOD(dbp, DB_OK_HASH);
hashp = dbp->h_internal;
hashp->h_hash = func;
return (0);
}
/*
* __db_get_h_nelem --
*
* PUBLIC: int __ham_get_h_nelem __P((DB *, u_int32_t *));
*/
int
__ham_get_h_nelem(dbp, h_nelemp)
DB *dbp;
u_int32_t *h_nelemp;
{
HASH *hashp;
DB_ILLEGAL_METHOD(dbp, DB_OK_HASH);
hashp = dbp->h_internal;
*h_nelemp = hashp->h_nelem;
return (0);
}
/*
* __ham_set_h_nelem --
* Set the table size.
*/
static int
__ham_set_h_nelem(dbp, h_nelem)
DB *dbp;
u_int32_t h_nelem;
{
HASH *hashp;
DB_ILLEGAL_AFTER_OPEN(dbp, "DB->set_h_nelem");
DB_ILLEGAL_METHOD(dbp, DB_OK_HASH);
hashp = dbp->h_internal;
hashp->h_nelem = h_nelem;
return (0);
}
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