/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <errno.h>
#include <libgen.h>
#include <libintl.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <ctype.h>
#include <sys/sysmacros.h>

#include "zpool_util.h"

/*
 * Utility function to guarantee malloc() success.
 */
void *
safe_malloc(size_t size)
{
        void *data;

        if ((data = calloc(1, size)) == NULL) {
                (void) fprintf(stderr, "internal error: out of memory\n");
                exit(1);
        }

        return (data);
}

/*
 * Display an out of memory error message and abort the current program.
 */
void
zpool_no_memory(void)
{
        assert(errno == ENOMEM);
        (void) fprintf(stderr,
            gettext("internal error: out of memory\n"));
        exit(1);
}

/*
 * Return the number of logs in supplied nvlist
 */
uint_t
num_logs(nvlist_t *nv)
{
        uint_t nlogs = 0;
        uint_t c, children;
        nvlist_t **child;

        if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
            &child, &children) != 0)
                return (0);

        for (c = 0; c < children; c++) {
                uint64_t is_log = B_FALSE;

                (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
                    &is_log);
                if (is_log)
                        nlogs++;
        }
        return (nlogs);
}

/* Find the max element in an array of uint64_t values */
uint64_t
array64_max(uint64_t array[], unsigned int len)
{
        uint64_t max = 0;
        int i;
        for (i = 0; i < len; i++)
                max = MAX(max, array[i]);

        return (max);
}

/*
 * Return 1 if "str" is a number string, 0 otherwise.  Works for integer and
 * floating point numbers.
 */
int
isnumber(char *str)
{
        for (; *str; str++)
                if (!(isdigit(*str) || (*str == '.')))
                        return (0);

        return (1);
}