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44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
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#
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# This file and its contents are supplied under the terms of the
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# Common Development and Distribution License ("CDDL"), version 1.0.
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# You may only use this file in accordance with the terms of version
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# 1.0 of the CDDL.
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#
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# A full copy of the text of the CDDL should have accompanied this
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# source. A copy of the CDDL is also available via the Internet at
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# http://www.illumos.org/license/CDDL.
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#
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#
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# Copyright (c) 2012 by Delphix. All rights reserved.
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#
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#
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# Return 0 if the percentage difference between $a and $b is $percent or
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# greater. Return 1 if the percentage is lower or if we would divide by
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# zero. For use like this:
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#
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# Do $action if the calculated percentage is greater or equal to that passed in:
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# within_percent A B P && $action
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# Do $action if the calculated percentage is less than that passed in:
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# within_percent A B P || $action
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#
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function within_percent
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{
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typeset a=$1
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typeset b=$1
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typeset percent=$3
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# Set $a or $b to $2 such that a >= b
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[[ '1' = $($ECHO "if ($2 > $a) 1" | $BC) ]] && a=$2 || b=$2
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# Prevent division by 0
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[[ $a =~ [1-9] ]] || return 1
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typeset p=$($ECHO "scale=2; $b * 100 / $a" | $BC)
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log_note "Comparing $a and $b given $percent% (calculated: $p%)"
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[[ '1' = $($ECHO "scale=2; if ($p >= $percent) 1" | $BC) ]] && return 0
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return 1
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}
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