# Copyright (c) 2017 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Johnny C. Lam.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# NAME
#	quote.subr -- quote strings for use with shell eval
#
# SYNOPSIS
#	local quoted
#	task_quote arg [...]
#
# DESCRIPTION
#	The task_quote function sets a shell variable $quoted to a string
#	that has all of the original function arguments quoted and
#	concatenated together.
#
# ENVIRONMENT
#	The following variables are used if they are set:
#
#	SED	The name or path to the sed(1) utility.
#
# EXAMPLES
#	local quoted
#	task_quote "$arg1" "$arg2" "$arg3"
#	eval func $quoted
#

__task_quote__="yes"

task_quote()
{
	: ${SED:=sed}

	# Return quoted args in $quoted.
	quoted=

	local arg
	for arg; do
		case $arg in
		*'!'*|*'*'*|*'?'*|*'['*|*'\'*|*"'"*)
			arg="'"`echo "$arg" | ${SED} -e "s,','\\\\\\'',g"`"'" ;;
		*)	arg="'"$arg"'" ;;
		esac
		case $quoted in
		"")	quoted=$arg ;;
		*)	quoted="$quoted $arg" ;;
		esac
	done
	# POST-CONDITION:
	# quoted is set to the string with all arguments quoted.
}