// SPDX-License-Identifier: CDDL-1.0
/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * https://opensource.org/license/CDDL-1.0.
 */
/*
 * 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 <string.h>
#include <ctype.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);
}

/*
 * Utility function to guarantee realloc() success.
 */
void *
safe_realloc(void *from, size_t size)
{
	void *data;

	if ((data = realloc(from, 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);
}