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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2009. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*
*/
#include <stdlib.h>
#include <string.h>
#include "hash.h"
ei_hash *ei_hash_newtab(int tabsize)
{
ei_hash *tab=NULL;
int bucketpos=sizeof(*tab);
/* make sure size is odd, then increase until prime */
tabsize |= 0x1;
while (!ei_isprime(tabsize)) tabsize +=2;
/* we will only do one malloc, so "sizeof(*tab)"
* must be adjusted to align tab->tab properly
*/
ei_align(bucketpos);
/* single malloc, then fill in all fields */
if ((tab = malloc(bucketpos + (tabsize * (sizeof(*(tab->tab))))))) {
tab->tab = (ei_bucket **)((char *)tab + bucketpos);
memset(tab->tab,0,tabsize*sizeof(*(tab->tab)));
tab->hash = ei_dohash;
tab->size = tabsize;
tab->npos = 0;
tab->nelem = 0;
tab->freelist = NULL;
}
return tab;
}
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