proc compress
	local	0,001000,s
	local	1,001000,c
	local	2,000020,i
	local	3,000000,upto
	local	4,000000,many
	con	0,002000,0
	con	1,002000,1
	filen	[-.source]strutil.icn
	declend
	line	12
	mark	L1
	pnull
	var	2
	int	0
	line	14
	asgn
	unmark
lab L1
	mark	L2
lab L3
	line	15
	mark0
	pnull
	var	2
	var	3
	var	1
	var	0
	pnull
	var	2
	int	1
	plus
	invoke	3
	asgn
	unmark
	mark	L3
	pnull
	var	0
	pnull
	pnull
	var	0
	int	1
	pnull
	var	2
	int	1
	line	16
	plus
	sect
	pnull
	var	0
	var	4
	pnull
	var	0
	var	2
	subsc
	var	0
	var	2
	invoke	3
	int	0
	sect
	cat
	asgn
lab L4
	unmark
	goto	L3
lab L5
	unmark
lab L2
	mark	L6
	mark	L7
	var	0
	line	17
	pret
lab L7
	line	17
	pfail
	unmark
lab L6
	pnull
	line	18
	pfail
	end
proc delete
	local	0,001000,s
	local	1,001000,c
	local	2,000020,i
	local	3,000000,upto
	local	4,000000,many
	con	0,010000,0
	filen	[-.source]strutil.icn
	declend
	line	22
	mark	L1
lab L2
	line	24
	mark0
	pnull
	var	2
	var	3
	var	1
	var	0
	invoke	2
	asgn
	unmark
	mark	L2
	pnull
	pnull
	var	0
	var	2
	var	4
	var	1
	var	0
	var	2
	line	25
	invoke	3
	sect
	str	0
	asgn
lab L3
	unmark
	goto	L2
lab L4
	unmark
lab L1
	mark	L5
	mark	L6
	var	0
	line	26
	pret
lab L6
	line	26
	pfail
	unmark
lab L5
	pnull
	line	27
	pfail
	end
proc rotate
	local	0,001000,s
	local	1,001000,i
	con	0,002000,1
	con	1,002000,0
	filen	[-.source]strutil.icn
	declend
	line	31
	mark	L1
	pnull
	pnull
	var	1
	line	32
	null
	int	0
	asgn
	unmark
lab L1
	mark	L2
	mark0
	pnull
	var	1
	int	1
	line	33
	numle
	unmark
	pnull
	var	1
	dup
	pnull
	var	0
	size
	plus
	asgn
	unmark
lab L2
	mark	L3
	pnull
	var	1
	dup
	pnull
	var	0
	line	34
	size
	mod
	asgn
	unmark
lab L3
	mark	L4
	mark	L5
	pnull
	pnull
	var	0
	pnull
	var	1
	int	0
	line	35
	plus
	int	1
	sect
	pnull
	var	0
	int	0
	pnull
	var	1
	int	0
	plus
	sect
	cat
	pret
lab L5
	line	35
	pfail
	unmark
lab L4
	pnull
	line	36
	pfail
	end