/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2000 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#include        <stdio.h>
#include        <stdlib.h>
#include        <string.h>
#include        <libelf.h>
#include        "_crle.h"

Hash_tbl *
make_hash(int size, Hash_type type, ulong_t ident)
{
        Hash_tbl *      tbl;

        if ((tbl = malloc(sizeof (Hash_tbl))) == 0)
                return (0);

        tbl->t_entry = calloc(size, (unsigned)(sizeof (Hash_ent *)));
        if (tbl->t_entry == NULL) {
                free(tbl);
                return (0);
        }

        tbl->t_ident = ident;
        tbl->t_type = type;
        tbl->t_size = size;

        return (tbl);
}


Hash_ent *
get_hash(Hash_tbl * tbl, Addr key, Half id, int mode)
{
        int             bucket;
        Hash_ent *      ent;
        Word            hashval;

        if (tbl->t_type == HASH_STR)
                hashval = elf_hash((const char *)key);
        else
                hashval = key;

        bucket = hashval % tbl->t_size;

        if (mode & HASH_FND_ENT) {
                for (ent = tbl->t_entry[bucket]; ent != NULL;
                    ent = ent->e_next) {
                        if (tbl->t_type == HASH_STR) {
                                if ((strcmp((const char *)ent->e_key,
                                    (const char *)key) == 0) && ((id == 0) ||
                                    (id == ent->e_id)))
                                        return (ent);
                        } else {
                                if (ent->e_key == key)
                                        return (ent);
                        }
                }
        }
        if (!(mode & HASH_ADD_ENT))
                return (0);

        /*
         * Key not found in this hash table ... insert new entry into bucket.
         */
        if ((ent = calloc(1, sizeof (Hash_ent))) == NULL)
                return (0);

        ent->e_key = key;
        ent->e_hash = hashval;

        /*
         * Hook into bucket chain
         */
        ent->e_next = tbl->t_entry[bucket];
        tbl->t_entry[bucket] = ent;

        return (ent);
}