#
# 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
# http://www.illumos.org/license/CDDL.
#

#
# Copyright (c) 2012 by Delphix. All rights reserved.
#

typeset -a compress_props=('on' 'off' 'lzjb' 'gzip' 'gzip-1' 'gzip-2' 'gzip-3'
    'gzip-4' 'gzip-5' 'gzip-6' 'gzip-7' 'gzip-8' 'gzip-9' 'zle')

typeset -a checksum_props=('on' 'off' 'fletcher2' 'fletcher4' 'sha256' 'sha512'
    'edonr' 'skein' 'noparity')

#
# Given the property array passed in, return 'num_props' elements to the
# user, excluding any elements below 'start.' This allows us to exclude
# 'off' and 'on' which can be either unwanted, or a duplicate of another
# property respectively.
#
function get_rand_prop
{
	typeset prop_array=($(eval echo \${$1[@]}))
	typeset -i num_props=$2
	typeset -i start=$3
	typeset retstr=""

	[[ -z $prop_array || -z $num_props || -z $start ]] && \
	    log_fail "get_rand_prop: bad arguments"

	typeset prop_max=$((${#prop_array[@]} - 1))
	typeset -i i
	for i in $($SHUF -i $start-$prop_max -n $num_props); do
		retstr="${prop_array[$i]} $retstr"
	done
	echo $retstr
}

function get_rand_compress
{
	get_rand_prop compress_props $1 2
}

function get_rand_compress_any
{
	get_rand_prop compress_props $1 0
}

function get_rand_checksum
{
	get_rand_prop checksum_props $1 2
}

function get_rand_checksum_any
{
	get_rand_prop checksum_props $1 0
}