1# 2# This file and its contents are supplied under the terms of the 3# Common Development and Distribution License ("CDDL"), version 1.0. 4# You may only use this file in accordance with the terms of version 5# 1.0 of the CDDL. 6# 7# A full copy of the text of the CDDL should have accompanied this 8# source. A copy of the CDDL is also available via the Internet at 9# http://www.illumos.org/license/CDDL. 10# 11 12# 13# Copyright (c) 2012 by Delphix. All rights reserved. 14# 15 16# 17# Return 0 if the percentage difference between $a and $b is $percent or 18# greater. Return 1 if the percentage is lower or if we would divide by 19# zero. For use like this: 20# 21# Do $action if the calculated percentage is greater or equal to that passed in: 22# within_percent A B P && $action 23# Do $action if the calculated percentage is less than that passed in: 24# within_percent A B P || $action 25# 26function within_percent 27{ 28 typeset a=$1 29 typeset b=$1 30 typeset percent=$3 31 32 # Set $a or $b to $2 such that a >= b 33 [[ '1' = $($ECHO "if ($2 > $a) 1" | $BC) ]] && a=$2 || b=$2 34 35 # Prevent division by 0 36 [[ $a =~ [1-9] ]] || return 1 37 38 typeset p=$($ECHO "scale=2; $b * 100 / $a" | $BC) 39 log_note "Comparing $a and $b given $percent% (calculated: $p%)" 40 [[ '1' = $($ECHO "scale=2; if ($p >= $percent) 1" | $BC) ]] && return 0 41 42 return 1 43} 44