*******************************************************************************
*
*	Support of PR1ME INFORMATION subroutine '-SUBSTRINGS'
*
*	Module	%M%	Version	%I% 	Date	%H%
*
*	(c) Copyright 1998 Ardent Software Inc. - All Rights Reserved
*	This is unpublished proprietary source code of Ardent Software Inc.
*	The copyright notice above does not evidence any actual or intended
*	publication of such source code.
*
*******************************************************************************
*
*	Maintenence log - insert most recent change descriptions at top
*
*	Date.... GTAR# WHO Description.........................................
*	10/13/98 23801 RGA Change copyright info.
*	08/10/95 17135 JC  Added MAP argument for NLS.
*	07/02/90 6994  JWT integrate patch from ULTIMATE for syntax support
*	06/06/90 7077  JWT fix some typos
* 	11/14/89 4743  KIS Print error if mode type greater than 3
*	07/27/88 5190  JSM Changed to get blocksiz from MT:Unit in &DEVICE&
*	07/25/88   -    -  Maintenence log purged at 5.2.1, see release 5.1.10.
*
*******************************************************************************

$OPTIONS DEFAULT

	@SYSTEM.RETURN.CODE = -1
	open "VOC" to f.VOC else
		print 'Unable to open your VOC'
		stop
	end

	open "&DEVICE&" to f.DEVICE else
		print 'Unable to open the &DEVICE& file'
		stop
	end

	dim line(9)
	mat line = ""
		
	matparse line from trim(@sentence) , " "

	unit = -1; blocksiz = 'none'; mode = 0
	mapname = ''

	i = 2
	scanlim = 8

* the following code was added to allow t.att to work like Ultimate
*
	commapos = index(line(2),",",1)
	if commapos # 0 then
		line(9) = line(8)
		line(8) = line(7)
		line(7) = line(6)
		line(6) = line(5)
		line(5) =  line(2)[commapos+1,999]
		line(4) = "BLK"
		line(3) = line(2)[1,commapos-1]
		line(2)= "MTU"
		scanlim += 3
	end else
		if inmat() = 2 and num(line(2)) then
			line(3) = line(2)
			line(2) = 'MTU'
		end
	end
	
	loop
	until line(i) = ''  or i = scanlim do
	read item from f.VOC,upcase(line(i)) then
		if item<1>[1,1]='K' and item<2>=40 then line(i)='K_MTU'
		if item<1>[1,1]='K' and item<2>=41 then line(i)='K_BLK'
		if item<1>[1,1]='K' and item<2>=400 then line(i)='K_MAP'
	end

	begin case
	case line(i)='K_MTU'
		if unit # -1 then
			print 'Keyword "MTU" previously specified'
			stop
		end
		i+=1
		if line(i) = '' then
			print 'Missing MTU specifcation'
			stop
		end
		if not(num(line(i))) then
			print 'Illegal MTU specification "':line(i):'"'
			stop
		end
		unit = mod(line(i),10)
          if len(line(i)) = 3 then
                  mode = line(i)[1,1]
                  if mode > 3 then
                          print 'Mode value greater than 3--too large'
                          stop
                  end
          end else
                  mode = 0
          end
	case line(i)='K_BLK'
		if blocksiz # 'none' then
			print 'Keyword "BLK" previously specified'
			stop
		end
		i+=1

		max = len(line(i))
		if line(i)[1,1] = '(' then
			line(i) = line(i)[2,max-1]
			max-=1
		end
		if line(i)[max,1] = ')' then
			line(i) = line(i)[1,max-1]
			max-=1
		end
		if line(i) = '' then
			print 'Missing tape block size specification'
			stop
		end
		if not(num(line(i))) then
			print 'Illegal tape block size specification "':line(i):'"'
			stop
		end
		blocksiz = line(i)
	case line(i)='K_MAP'
		if mapname # '' then
			print 'Keyword "MAP" previously specified'
			stop
		end

		if NOT(SYSTEM(100)) then
			print "Unable to set a mapname when NLS is not active"
			stop
		end

		i+=1

		max = len(line(i))
		if line(i)[1,1] = '(' then
			line(i) = line(i)[2,max-1]
			max-=1
		end
		if line(i)[max,1] = ')' then
			line(i) = line(i)[1,max-1]
			max-=1
		end
		if line(i) = '' then
			print 'Missing mapname specification'
			stop
		end
		mapname = line(i)
			
	case 1
		if blocksiz # 'none' then
			print 'Tape block size previously specified'
			stop
		end
		max = len(line(i))
		if line(i)[1,1] = '(' then
			line(i) = line(i)[2,max-1]
			max-=1
		end
		if line(i)[max,1] = ')' then
			line(i) = line(i)[1,max-1]
			max-=1
		end
		if line(i) = '' then
			print 'Missing tape block size specification'
			stop
		end
		if not(num(line(i))) then
			print 'Illegal token "':line(i):'" on command line'
			stop
		end
		blocksiz = line(i)
	end case
	i+=1
	repeat

	if unit = -1 then unit = 0
	if blocksiz = 'none' then
		read item from f.DEVICE,'MT':unit else
			print "Unable to read &DEVICE& file entry for 'MT":unit:"'"
			stop
		end
		blocksiz = item<3>
		if blocksiz = '' then
			read item from f.VOC,'T.ATT' else
				print "Unable to read VOC entry for 'T.ATT'"
				stop
			end
			blocksiz = item<5>
		end
	end

	cmd="ASSIGN MT":unit:" TO MTU ":unit
	if blocksiz # '' then cmd:=" BLK ":blocksiz
	if mapname # '' then cmd:=" MAP ":mapname

	chain cmd