140 lines
2.8 KiB
C
140 lines
2.8 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <errno.h>
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#include <libgen.h>
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#include <libintl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <ctype.h>
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#include "zpool_util.h"
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/*
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* Utility function to guarantee malloc() success.
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*/
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void *
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safe_malloc(size_t size)
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{
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void *data;
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if ((data = calloc(1, size)) == NULL) {
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(void) fprintf(stderr, "internal error: out of memory\n");
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exit(1);
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}
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return (data);
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}
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/*
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* Display an out of memory error message and abort the current program.
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*/
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void
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zpool_no_memory(void)
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{
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assert(errno == ENOMEM);
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(void) fprintf(stderr,
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gettext("internal error: out of memory\n"));
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exit(1);
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}
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/*
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* Return the number of logs in supplied nvlist
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*/
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uint_t
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num_logs(nvlist_t *nv)
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{
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uint_t nlogs = 0;
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uint_t c, children;
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nvlist_t **child;
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if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
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&child, &children) != 0)
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return (0);
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for (c = 0; c < children; c++) {
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uint64_t is_log = B_FALSE;
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(void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
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&is_log);
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if (is_log)
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nlogs++;
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}
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return (nlogs);
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}
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/* Find the max element in an array of uint64_t values */
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uint64_t
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array64_max(uint64_t array[], unsigned int len)
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{
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uint64_t max = 0;
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int i;
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for (i = 0; i < len; i++)
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max = MAX(max, array[i]);
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return (max);
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}
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/*
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* Return 1 if "str" is a number string, 0 otherwise. Works for integer and
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* floating point numbers.
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*/
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int
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isnumber(char *str)
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{
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for (; *str; str++)
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if (!(isdigit(*str) || (*str == '.')))
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return (0);
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return (1);
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}
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/*
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* Find highest one bit set.
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* Returns bit number + 1 of highest bit that is set, otherwise returns 0.
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*/
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int
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highbit64(uint64_t i)
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{
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if (i == 0)
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return (0);
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return (NBBY * sizeof (uint64_t) - __builtin_clzll(i));
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}
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/*
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* Find lowest one bit set.
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* Returns bit number + 1 of lowest bit that is set, otherwise returns 0.
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*/
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int
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lowbit64(uint64_t i)
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{
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if (i == 0)
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return (0);
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return (__builtin_ffsll(i));
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}
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