/*
 * 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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <libintl.h>
#include <string.h>
#include <stdlib.h>
#include <libuutil.h>

#include "idtab.h"

#define IDTAB_GROW      2       /* Table size multiplier on grow */
#define IDTAB_DEFSIZE   16      /* Starting table size */

void
idtab_create(idtab_t *idt)
{
        (void) memset(idt, 0, sizeof (idtab_t));
}

void
idtab_destroy(idtab_t *idt)
{
        if (idt->id_data) {
                free(idt->id_data);
                idt->id_data = NULL;
                idt->id_nelems = idt->id_size = 0;
        }
}

void
idtab_append(idtab_t *idt, idkey_t id)
{
        size_t size;
        void *data;

        if (idt->id_nelems >= idt->id_size) {
                size = idt->id_size ? idt->id_size * IDTAB_GROW : IDTAB_DEFSIZE;

                if (data = realloc(idt->id_data, sizeof (idkey_t) * size)) {
                        idt->id_data = data;
                        idt->id_size = size;
                } else {
                        uu_die(gettext("Failed to grow table"));
                }
        }

        idt->id_data[idt->id_nelems++] = id;
}

static int
idtab_compare(const void *lhsp, const void *rhsp)
{
        idkey_t lhs = *((idkey_t *)lhsp);
        idkey_t rhs = *((idkey_t *)rhsp);

        if (lhs == rhs)
                return (0);

        return (lhs > rhs ? 1 : -1);
}

void
idtab_sort(idtab_t *idt)
{
        if (idt->id_data) {
                qsort(idt->id_data, idt->id_nelems,
                    sizeof (idkey_t), idtab_compare);
        }
}

int
idtab_search(idtab_t *idt, idkey_t id)
{
        return (bsearch(&id, idt->id_data, idt->id_nelems,
            sizeof (idkey_t), idtab_compare) != NULL);
}