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Trailing-Edge - PDP-10 Archives - tops20tools_v6_9-jan-86_dumper - tools/tvaxv2/gtvr04.mar
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	.TITLE	GTVR04 - COMMAND PARSE ROUTINE
;	ENTRY	GTVR04
;	PARAMETERS
;		R0 = LENGTH INPUT
;		R1 = ADDR OF INPUT
;
;	STACK FOR INPUT INTERPRETER
GSILL==0			;INPUT LENGTH
GSIADR==GSILL+4		;ADDR INPUT
GSITR==GSIADR+4		;NR 0F <> LEVELS ACTIVE
GSITT==GSITR+4		;WORK AREA FOR ITERATION MAX 15
GSXLL==GSITT+15*8
	INIT	GTVR04
	SUBL2	#GSXLL,SP
	MOVL	SP,R11			;COMMAND INTERPRETER STACK AREA
	MOVL	R0,GSILL(R11)
	CMPW	#1,R0
	IF.	*EQ		;IMMIDIATE COMM
		BISB2	#GXIN1,GSTAT
	ENDIF.
	MOVL	R1,GSIADR(R11)		;SAVE LL + ADDR
	CLRL	GSITR(R11)		;NR <> LEVELS
	BICB2	#GXRNG+GXVAL+GXSRCH1,GSTAT
L1:
	CALLS	#0,GTVR05	;GET EXPRESSION IN GEXP1
	TSTW	GERRN
	IF.	*GTS		;ERROR DETECTED
		RET
	ENDIF.
	MOVL	GSIADR(R11),R6
	DECW	GSILL(R11)
	BITB	#GXRNG,GSTAT
	IF.	*ON		;RANGE PRESENT
		CASEB	(R6)+,#75,#45
DC1:		.WORD	D75-DC1	; K
		.REPEAT	12
		.WORD	DERRNG-DC1
		.ENDR
		.WORD	D88-DC1	; X
		.REPEAT	18
		.WORD	DERRNG-DC1
		.ENDR
		.WORD	D75-DC1		; k
		.REPEAT	12
		.WORD	DERRNG-DC1
		.ENDR
		.WORD	D88-DC1		; x
DERRNG:		MOVW	#21,GERRN
		BICB2	#GXRNG,GSTAT
		RET
	ENDIF.
	BITB	#GXVAL,GSTAT
	IF.	*ON
		BICB2	#GXVAL,GSTAT
		CASEB	(R6)+,#27,#95
DC2:		.WORD	L2-DC2		;ESCAPE
		.REPEAT	30
		.WORD	DERVAL-DC2
		.ENDR
		.WORD	D58-DC2		;:
		.WORD	D59X-DC2		; ;
		.WORD	D60-DC2		; <
		.WORD	D61-DC2		; =
		.WORD	DERVAL-DC2	;>
		.WORD	DERVAL-DC2	; ?
		.WORD	DERVAL-DC2	; @
		.WORD	D65X-DC2		; A
		.WORD	DERVAL-DC2	; B
		.WORD	D67-DC2		; C
		.WORD	D68-DC2		; D
		.WORD	D69-DC2		; E
		.WORD	DERVAL-DC2	; F
		.WORD	DERVAL-DC2	; G
		.WORD	DERVAL-DC2	; H
		.WORD	D73X-DC2		; I
		.WORD	D74-DC2		; J
		.WORD	D75-DC2		; K
		.WORD	D76-DC2		; L
		.WORD	D77-DC2	; M
		.WORD	D78-DC2		;N
		.WORD	DERVAL-DC2	; O
		.WORD	DERVAL-DC2	; P
		.WORD	DERVAL-DC2	; Q
		.WORD	D82-DC2		; R
		.WORD	D83-DC2		; S
		.WORD	D84-DC2		; T
		.WORD	D85-DC2		; u
		.WORD	DERVAL-DC2	; V
		.WORD	DERVAL-DC2	; W
		.WORD	D88-DC2		; X
		.WORD	DERVAL-DC2	; Y
		.WORD	DERVAL-DC2	; Z
		.WORD   DERVAL-DC2	; [
		.WORD	D92-DC2		; \
		.WORD   DERVAL-DC2	; ]
		.WORD   DERVAL-DC2	; ^
		.WORD   DERVAL-DC2	; _
		.WORD   DERVAL-DC2	; '
		.WORD	D65X-DC2	; a
		.WORD	DERVAL-DC2	; b
		.WORD	D67-DC2		; c
		.WORD	D68-DC2		; d
		.WORD	D69-DC2		; e
		.WORD	DERVAL-DC2	; f
		.WORD	DERVAL-DC2	; g
		.WORD	DERVAL-DC2	; h
		.WORD	D73X-DC2	; i
		.WORD	D74-DC2		; j
		.WORD	D75-DC2		; k
		.WORD	D76-DC2		; l
		.WORD	D77-DC2	; m
		.WORD	D78-DC2		; n
		.WORD	DERVAL-DC2	; o
		.WORD	DERVAL-DC2	; p
		.WORD	DERVAL-DC2	; q
		.WORD	D82-DC2		; r
		.WORD	D83-DC2		; s
		.WORD	D84-DC2		; t
		.WORD	D85-DC2		; u
		.WORD	DERVAL-DC2	; v
		.WORD	DERVAL-DC2	; w
		.WORD	D88-DC2		; x
		.WORD	DERVAL-DC2	; y
		.WORD	DERVAL-DC2	; z
DERVAL:		MOVW	#25,GERRN
		RET
	ENDIF.
	CASEB	(R6)+,#8,#120
DC:	.WORD	D8-DC		;BS
	.WORD	D9-DC		;TAB
	.WORD	D10-DC		;LF
	.WORD	DERR-DC
	.WORD	D12-DC		;^L
	.WORD	L2-DC		;CR SKIP IT
	.REPEAT	10
	.WORD	DERR-DC		;SPECIAL ^ CHAR
	.ENDR
	.WORD	D24-DC		;^X
	.WORD	DERR-DC,DERR-DC
	.WORD	L2-DC		; ESC , SKIP IT
	.REPEAT	4
	.WORD	DERR-DC
	.ENDR
	.WORD	D32-DC		;SPACE
	.WORD	D33-DC		;!  LABEL
	.WORD	D34-DC		;"
	.WORD	DERR-DC		;# EXPR
	.WORD	DERR-DC		;36 - $
	.WORD	DERR-DC		;% EXP
	.WORD	DERR-DC		;& EXP
	.WORD	D39-DC		;'
	.WORD	DERR-DC,DERR-DC,DERR-DC,DERR-DC	;( ) * +  EXP
	.WORD	DERR-DC		;,
	.BLKW	13		;- . / 0-9  EXP
	.WORD	D58-DC		;:
	.WORD	D59-DC		; ;
	.WORD	D60X-DC		; <
	.WORD	DERR-DC		; =
	.WORD	D62-DC		; >
	.WORD	D63-DC		; ?
	.WORD	DERR-DC		; @ EXP
	.WORD	D65-DC		; A
	.WORD	DERR-DC		; B EXP
	.WORD	D67-DC		; C
	.WORD	D68-DC		; D
	.WORD	D69X-DC		; E
	.WORD	DERR-DC		; F EXP
	.WORD	D71-DC		; G
	.WORD	DERR-DC		; H 
	.WORD	D73-DC		; I
	.WORD	D74X-DC		; J
	.WORD	D75-DC		;K
	.WORD	D76-DC		;L
	.WORD	D77-DC		;M
	.WORD	D78-DC		;N
	.WORD	D79-DC		;O
	.WORD	D80-DC		;P
	.WORD	DERR-DC		;Q EXP
	.WORD	D82-DC		;R
	.WORD	D83-DC		;S
	.WORD	D84-DC		;T
	.WORD	DERR-DC		;U
	.WORD	DERR-DC		;V
	.WORD	D87-DC		;W
	.WORD	D88-DC		;X
	.WORD	D89-DC		;Y
	.WORD	DERR-DC		;Z EXP
	.WORD	D91-DC		;[
	.WORD	DERR-DC		;\
	.WORD	D93-DC		;]
	.WORD	D91-DC		;^
	.WORD	D91-DC		;_
	.WORD	D91-DC		;'
	.WORD	D65-DC		; a
	.WORD	DERR-DC		; b EXP
	.WORD	D67-DC		; c
	.WORD	D68-DC		; d
	.WORD	D69X-DC		; e
	.WORD	DERR-DC		; f EXP
	.WORD	D71-DC		; g
	.WORD	DERR-DC		; h 
	.WORD	D73-DC		; i
	.WORD	D74X-DC		; j
	.WORD	D75-DC		; k
	.WORD	D76-DC		; l
	.WORD	D77-DC		; m
	.WORD	D78-DC		; n
	.WORD	D79-DC		; o
	.WORD	D80-DC		; p
	.WORD	DERR-DC		; q EXP
	.WORD	D82-DC		; r
	.WORD	D83-DC		; s
	.WORD	D84-DC		; t
	.WORD	DERR-DC		; u
	.WORD	DERR-DC		; v
	.WORD	D87-DC		; w
	.WORD	D88-DC		; x
	.WORD	D89-DC		; y
	.WORD	DERR-DC		; z EXP
	.REPEAT	5
	.WORD	DERR-DC		;123-127
	.ENDR
	.WORD	L2-DC		;END OF LINE SKIP IT
DERR:	MOVW	#8,GERRN
	RET
L2:	BITB	#GXTERM,GSTAT
	IF.	*ON			;ABORT
		MOVW	#24,GERRN
		RET
	ENDIF.
	TSTW	GSILL(R11)
	IF.	*GTS		;NOT END OF INPUT
		MOVL	R6,GSIADR(R11)
		BRW	L1
	ENDIF.
	TSTL	GSITR(R11)
	IF.	*NE		;<> ACTIVE
		MOVW	#12,GERRN
	ENDIF.
	RET
;
	.PAGE
D8:				;BS
	MOVL	#-1,GEXP1
	BSBW	GSHIFTLR	;BACK ONE LINE
	BRW	L2
;
D9:				;TAB
	DECL	R6
	INCW	GSILL(R11)
	BRW	D73		;DO AN INSERT
;
D10:				;LF
	MOVL	#1,GEXP1
	BSBW	GSHIFTLR	;ADVANCE ONE LINE
	BRW	L2
D12:				;^L
	BISB2	#GXCTLL,GSTAT
	BRW	L2
;
D24:				;^X
	BITB	#GX2SRC,GSTAT2
	IF.	*ON		;WAS UPPER/LOWER
		BICB2	#GX2SRC,GSTAT2
		MOVW	#-34,GERRN
	ELSE.			;WAS EXACT
		BISB2	#GX2SRC,GSTAT2
		MOVW	#-35,GERRN
	ENDIF.
	BRW	L2
;
D32:				;SPACE
	BISB2	#GXMORE,GSTAT
	BRW	L2
;
D33:				;!
D34:				;"
	BRW	DERR7
;
D39:				;'
	BRW	DERR7
;
DERR7:
	MOVW	#7,GERRN	;NOT YET SUPPORTED
	RET
D58:				; :
	DECW	GSILL(R11)
	INCL	R6
	MATCHC	#1,-1(R6),#W58TL,W58T
	CASEB	(R3),#0,#4
D58B:	.WORD	D58-D58B			;@
	.WORD	D5801-D58B			;S
	.WORD	D5802-D58B			;R
	.WORD	D5803-D58B			;K
	.WORD	D5804-D58B			;X
	BRW	DERR
D5801:						;S
	BISB2	#GXSRCH1,GSTAT
	BRW	D83
D5802:						;R
	BISB2	#GXSRCH1,GSTAT
	BRW	D82
D5803:						;K
	BSBW	CHRA
	DECL	R0			;DO NOT DELETE END OF LINE
	BSBW	GDELR
	BRW	L2
D5804:					;X
	BSBW	CHRA
	DECL	R0
	BRW	D88X
W58T:	.BYTE	^A'@',0,^A'S',1,^A's',1,^A'R',2,^A'r',2,^A'K',3,^A'k',3
	.BYTE	^A'X',4,^A'x',4
W58TL=.-W58T
	.BYTE	4			;NO MATCH
;
D59X:	BISB2	#GXVAL,GSTAT
D59:				;;
	MOVL	R6,GSIADR(R11)
	BSBW	GTVR03C		; DO ; COMMAND
	BRW	L2
;
;
D60X:			;< DEFAULT VALUE
	MOVL	#10000000,GEXP1		;VERY OFTEN
D60:				;<
	CMPL	GSITR(R11),#15
	IF.	*EQ		;TOO MANY LEVELS
		MOVW	#5,GERRN
		RET
	ENDIF.
	TSTL	GEXP1
	IF.	*LES		;DO NOT EXECUTE
		MOVW	#37,GERRN
		RET
	ENDIF.
	INCL	GSITR(R11)
	MOVL	GSITR(R11),R1
	ADDL2	R1,R1		;2*8 = 16
	MOVAQ	GSITT(R11)[R1],R8	;SET TABLE PTR
	MOVL	R6,WISTA(R8)	;START COMMAND
	MOVW	GSILL(R11),WILL(R8)	;REM INPUT LENGTH
	MOVL	GEXP1,GWINC(R8)	;MAX LOOP CNT
	CLRL	GWICC(R8)	;CURRENT LOOP CNT
	BRW	L2
D61:				;=
	EDIT	GEXP1,9,GERR13+2
	MOVW	#-13,GERRN
	BRW	L2
;
D62:				;>
	TSTL	GSITR(R11)
	IF.	*EQ		;NO <> ACTIVE
		MOVW	#6,GERRN
		RET
	ENDIF.
	INCL	GWICC(R8)
	CMPL	GWICC(R8),GWINC(R8)
	IF.	*GES		;END OF LOOP
		DECL	GSITR(R11)
		IF.	*NE		;NOT LAST LOOP
			MOVL	GSITR(R11),R1
			ADDL2	R1,R1	;2*8 = 16
			MOVAQ	GSITT(R11)[R1],R8
		ENDIF.
	ELSE.			;NOT END OF LOOP
		MOVL	WISTA(R8),R6
		MOVW	WILL(R8),GSILL(R11)
	ENDIF.
	BRW	L2
WISTA=0			;ADDR OF START COMMAND OF LOOP
WILL=4			;LENGTH REM INPUT
GWINC==8			;N LOOP
GWICC==12			;CURRENT LOOP
D63:			;?
	BRW	DERR7
D65X:			;A + VALUE
	ADDL3	GFBUFFA,GFPTR,R1
	CMPL	GFPTR,GHPTR
	IF.	*GE
		ADDL2	GHCNT,R1
	ENDIF.
	CLRL	R0
	MOVB	(R1),GEXP1
	BISB2	#GXVAL,GSTAT			;INDICATE VALUE PRESENT
	BRW	D61			;DO A = COMMAND
;
D65:			;A
	BRW	DERR7
D67:			;C
	ADDL2	GEXP1,GFPTR
	IF.	*LTS		;TOO FAR BACK
		CLRL	GFPTR
		BRW	D6701
	ELSE.
		CMPL	GFPTR,GFCNT
		IF.	*GT		;TOO FAR AHEAD
			MOVL	GFCNT,GFPTR
D6701:			MOVW	#20,GERRN
		ENDIF.
	ENDIF.
	BRW	L2
;
D68:			;D
	MOVL	GEXP1,R0		;LL TO DELETE
	IF.	*LTS			;NEG
		MNEGL	R0,R0
		SUBL3 	R0,GFPTR,R1
		IF.	*LTS		;PASSED BEGIN OF BUFFER
			MOVW	#20,GERRN
			RET
		ENDIF.
		SUBL2	R0,GFPTR	;ADJUST CURRENT PTR
	ELSE.
		ADDL3	GFPTR,R0,R2
		CMPL	R2,GFCNT
		IF.	*GT		;PASSED END OF BUFFER
			MOVW	#20,GERRN
			RET
		ENDIF.
	ENDIF.
	BSBW	GDELR			;REMOVE IT
	BRW	L2
;
D69X:
	CLRL	GEXP1
D69:			;E
	INCL	GEXP1
	MOVL	GFPTR,WFPTR		;SAVE CURRENT PTR
	BSBW	GSHIFTLR		;TAKE POSITION
	TSTL	GFPTR
	IF.	*EQ		;AT START OF BUFFER
		MOVL	WFPTR,GFPTR	;RESTORE
		MOVW	#20,GERRN
		RET
	ENDIF.
	TSTL	R0
	IF.	*NE			;NOT AT END OF BUFFER
		DECL	GFPTR
	ENDIF.
	BRW	L2
;
D71:			;G
	MOVB	(R6),R1			;Q-REG NR
	BSBW	GTVR06OS		;GET ADDR LL STRING
	BSBW	GINSR			;INSERT IN BUFFER
	INCL	R6
	DECW	GSILL(R11)
	BRW	L2
;
;
D73X:			;I VALUE
	MOVAB	GEXP1,R1	;ADDR STRING
	MOVL	#1,R0
	BSBW	GINSR
	BRW	L2
D73:			;I  INSERT STRING
	CMPB	-2(R6),#^A'@'
	IF.	*EQ		;SPECIAL STRING
		DECW	GSILL(R11)
		IF.	*LTS		;WRONG SYNTAX
			MOVW	#32,GERRN
			RET
		ENDIF.
		INCL	R6
		LOCC	-1(R6),GSILL(R11),(R6)
	ELSE.
		LOCC	#ESC,GSILL(R11),(R6)
	ENDIF.
	SUBW3	R0,GSILL(R11),R0
	SUBW2	R0,GSILL(R11)
	DECW	GSILL(R11)
	MOVL	R6,R1		;START OF STRING
	ADDL2	R0,R6		;ADVANCE INPUT
	INCL	R6
	BSBW	GINSRX		;INSERT STRING
	BRW	L2
;
D74X:			;J DEFAULT VALUE
	CLRL	GEXP1
D74:			;J
	CMPL	GEXP1,GFCNT
	IF.	*GT		;OUTSIDE BUFFER
		MOVW	#20,GERRN
		RET
	ENDIF.
	MOVL	GEXP1,GFPTR		;SET PTR
	BRW	L2
;
D75:			;K
	BSBW	CHRA			;GET R0,R1
	BSBW	GDELR			;DELETE FROM BUFFER
	BRW	L2
;
D76:			;L
	BSBW	GSHIFTLR		;REPOSITION
	BRW	L2
;
D77:			;M
	MOVB	(R6),R1
	BSBW	GTVR06OS		;GET Q-REG
	SUBL2	R0,SP
	MOVC3	R0,(R1),(SP)		;SAVE ON STACK
	MOVL	GEXP1,R2		;LOOP COUNT
D77.1:	MOVL	SP,R1
	SUBL3	SP,R3,R0
	TSTL	R2
	IF.	*NE			;MORE TO GO
		CALLS	#0,GTVR04		;EXECUTE IT
		TSTW	GERRN
		IF.	*GTS			;SOME ERROR
			RET
		ENDIF.
		DECL	R2
		BRW	D77.1
	ENDIF.
	ADDL2	R0,SP			;RESET STACK
	INCL	R6
	DECW	GSILL(R11)
	BRW	L2
;
D78:			;N
D79:			;O
D80:			;P
	BRW	DERR7
D82:			;R
	BSBW	SETS1
	MOVL	R6,WSADD		;START SEARCH STR
	BSBW	SETSR
	BSBW	SETS2			;SETUP SEARCH STRING
	MOVL	R6,WRADD		;START REPLACE STRING
	BSBW	SETSR
	MOVW	R0,WRLL
D8201:	BSBW	SRCHR			;SCAN
	MOVZWL	WSLL,R0
	TSTL	GEXP1
	IF.	*LTS			;BACKWARD
		BSBW	GDELR			;DELETE IT
		MOVZWL	WRLL,R0
		MOVL	WRADD,R1
		MOVL	GFPTR,WFPTR		;SAVE PTR
		BSBW	GINSRX			;INSERT IT
		MOVL	WFPTR,GFPTR		;RESTORE PTR
		INCL	GEXP1
	ELSE.				;FORWARD
		SUBL2	R0,GFPTR
		BSBW	GDELR		;DELETE IT
		MOVZWL	WRLL,R0
		MOVL	WRADD,R1
		BSBW	GINSRX
		DECL	GEXP1
	ENDIF.
	IF.	*NE			;MORE TOO GO
		BRW	D8201
	ENDIF.
	BRW	D8302
WSLL:	.BLKL
WSADD:	.BLKL
WRLL:	.BLKW				;REPLACE STRING
WRADD:	.BLKL
;
;
D83:			;S
	BSBW	SETS1
	MOVL	R6,WSADD
	BSBW	SETSR			;SCAN STRING
	BSBW	SETS2
D8301:	BSBW	SRCHR			;FIND IT
	TSTL	GEXP1
	IF.	*LTS			;BACKWARD
		INCL	GEXP1
	ELSE.				;FORWARD
		DECL	GEXP1
	ENDIF.
	IF.	*NE			;MORE TOO GO
		BRW	D8301
	ENDIF.
D8302:	BITB	#GXSRCH1,GSTAT
	IF.	*ON		;SPECIAL SEARCH
		BICB2	#GXSRCH1,GSTAT
		BISB2	#GXVAL,GSTAT
		MOVL	#-1,GEXP1	;INDICATE FOUND
	ENDIF.
	BRW	L2
;
;
D84:			;T
	BRW	DERR7
D85:			;U
	MOVB	(R6),R1			;QREG NR
	MOVL	GEXP1,R0
	BSBW	GTVR06IN		;SET IT
	INCL	R6
	DECW	GSILL(R11)
	BRW	L2
;
D86:			;V	DO NOT IMPLEMENT
D87:			;W
	BRW	DERR7
D88:			;X
	BSBW	CHRA		;CHECK THE RANGE
D88X:
	ADDL3	GFBUFFA,GFPTR,WDADD
	ADDL2	GHCNT,WDADD		;AFTER HOLE
	MOVL	R0,WDLL
	MOVL	GFPTR,R1
	BSBW	GMOVHOLR	;SHIFT THE HOLE
	MOVB	(R6),R1
	MOVAB	WDADD,R0	;DESCRIPTOR ADDR
	BSBW	GTVR06IS
	MOVL	WDLL,R0
	BSBW	GDELR		;DELETE FROM BUFFER
	INCL	R6
	DECW	GSILL(R11)
	BRW	L2
WDADD:	.BLKL			;ADDRESS
WDLL:	.BLKL			;LENGTH
;
D89:			;Y
	CLRL	GFPTR
	CLRL	GFCNT
	CLRL	GHPTR
	MOVL	#8192,GHCNT		;INITIAL VALUE
	DECL	R6
	INCW	GSILL(R11)
	MOVL	R6,GSIADR(R11)
	BSBW	GTVR03C		;DO YANK
	BRW	L2
;
D91:			;[
	BRW	DERR7
D92:			;\
	CVTLP	GEXP1,#15,WWRK1
	SKPC	#0,#8,(R3)
	ADDL2	R0,R0
	BITB	#^XF0,(R1)
	IF.	*OFF
		SUBL2	#2,R0
		IF.	*EQ
			INCL	R0
		ENDIF.
	ELSE.
		DECL	R0
	ENDIF.
	MOVL	R0,GEXP1
	CVTPS	#15,WWRK1,R0,WWRK2
	MOVL	GEXP1,R0
	CMPB	#^A'+',WWRK2
	IF.	*EQ
		MOVAB	WWRK2+1,R1
	ELSE.
		MOVAB	WWRK2,R1
		INCL	R0
	ENDIF.
	BSBW	GINSR
	BRW	L2
WWRK1:	.BLKB	8
WWRK2:	.BLKB	8
;
D93:			;]
	BRW	DERR7
	.PAGE
SETS1:				;SETUP FOR SEARCH
	CMPB	-2(R6),#^A'@'
	IF.	*NE
		CMPW	-3(R6),#^A'@:'
		IF.	*NE		;NOT SPECIAL
			MOVB	#ESC,WSESC
			BRW	SETS101
		ENDIF.
	ENDIF.
	MOVB	(R6)+,WSESC
	DECW	GSILL(R11)
SETS101: TSTW	GSILL(R11)
	IF.	*LTS			;SYNTAX ERROR
		MOVW	#32,GERRN
		RET
	ENDIF.
	RSB
;
;
;	SCAN FOR STRING END WITH WSESC
;	IN	R6,GSILL(R11)
;
SETSR:
	TSTW	GSILL(R11)
	IF.	*LES		;NO MORE INPUT
		CMPB	WSESC,#ESC
		IF.	*NE		;SPECIAL SEARCH
			MOVW	#33,GERRN
			RET		;NO ARGUMENT
		ENDIF.
	ENDIF.
	LOCC	WSESC,GSILL(R11),(R6)
	SUBW3	R0,GSILL(R11),R0
	CMPW	R0,#256
	IF.	*GT		;TOO LONG
		MOVW	#27,GERRN
		RET
	ENDIF.
	ADDL3	#1,R1,R6
	SUBW2	R0,GSILL(R11)
	DECW	GSILL(R11)
	RSB
;
;	SET PREVIOUS SEARCH STRING IF NO STRING GIVEN
;
SETS2:
	TSTW	R0
	IF.	*EQ		;NO STRING PRESENT IN INPUT
		TSTW	WSLL
		IF.	*EQ		;NO PREVIOUS SET
			MOVW	#26,GERRN
			RET
		ENDIF.
	ELSE.
		MOVW	R0,WSLL
		MOVC3	R0,@WSADD,WSST
		MOVW	WSLL,R0
		MOVAB	WSST,R1
SETS201:	LOCC	#CR,R0,(R1)
		IF.	*NE		;CR FOUND
			MOVB	#GCRX,(R1)+	;CHANGE TO END OF LINE
			DECL	R0
			BRW	SETS201
		ENDIF.
	ENDIF.
	RSB
WSST:	.BLKB	256
WSST2:	.BLKB	256
WSESC:	.BLKB
	.PAGE
;	SEARCH FOR STRING IN BUFFER
;	IN	WSST = STRING
;		WSLL = LL STRING
;		GFPTR,GEXP1
;
SRCHR:	PUSHR	#^M<R7,R8>
	BITB	#GX2SRC,GSTAT2
	IF.	*ON		;UPPER/LOWER
		MOVTC	WSLL,WSST,#0,WUTAB,WSLL,WSST2
	ENDIF.
	TSTL	GEXP1
	IF.	*LTS		;BACKWARD SEARCH
		CMPL	GFPTR,GHPTR
		IF.	*GT
			MOVL	GFPTR,R1
			BSBW	GMOVHOLR	;SHIFT THE HOLE AFTER /\
		ENDIF.
		ADDL3	GFPTR,GFBUFFA,R7
		MOVL	GFCNT,R8
		SUBL2	WSLL,R7
		SUBL2	WSLL,R8
SRCH1:		IF.	*GES		;NOT PASSED  START OF BUFFER
			BITB	#GX2SRC,GSTAT2
			IF.	*OFF		;EXACT
				CMPB	(R7),WSST
				IF.	*NE		;FIRST CHAR NOT OK
					DECL	R7
					DECL	R8
					BRW	SRCH1
				ENDIF.
				CMPC3	WSLL,WSST,(R7)
				IF.	*NE		;NO MATCH
					DECL	R7
					DECL	R8
					BRW	SRCH1
				ENDIF.
			ELSE.		;UPPER/LOWER
				MOVTC	#1,(R7),#0,WUTAB,#1,@GOBUFFA
				CMPB	@GOBUFFA,WSST2
				IF.	*NE
					DECL	R7
					DECL	R8
					BRW	SRCH1
				ENDIF.
				MOVTC	WSLL,(R7),#0,WUTAB,WSLL,@GOBUFFA
				CMPC3	WSLL,WSST2,@GOBUFFA
				IF.	*NE
					DECL	R7
					DECL	R8
					BRW	SRCH1
				ENDIF.
			ENDIF.
			SUBL3	GFBUFFA,R7,GFPTR
		ELSE.
SRCH2:			BITB	#GXSRCH1,GSTAT
			IF.	*ON		;SPECIAL SEARCH
				BICB2	#GXSRCH1,GSTAT
				BISB2	#GXVAL,GSTAT
				CLRL	GEXP1		;NOT FOUND
				POPR	#^M<R7,R8>	;RELOAD
				POPL	R1		;CLEAN UP STACK
				BRW	L2
			ENDIF.
			MOVW	#28,GERRN		;NOT FOUND
			RET
		ENDIF.
	ELSE.			;FORWARD
		CMPL	GFPTR,GHPTR
		IF.	*LT
			MOVL	GFPTR,R1
			BSBW	GMOVHOLR
		ENDIF.
		ADDL3	GFPTR,GFBUFFA,R3
		ADDL2	GHCNT,R3
		SUBL3	GFPTR,GFCNT,R8			;LENGTH TO SCAN
		BITB	#GX2SRC,GSTAT2
		IF.	*OFF			;EXACT
SRCH3:			CMPL	R8,G64K
			IF.	*GT
				MOVL	G64K,R0
				SUBL2	G64K,R8
			ELSE.
				MOVL	R8,R0
				CLRL	R8
			ENDIF.
			MATCHC	WSLL,WSST,R0,(R3)
			IF.	*NE		;NO MATCH
				TSTL	R8
				IF.	*NE	;NOT END OF BUFFER
					SUBL3	#1,WSLL,R1
					ADDL2	R1,R8		;TAKE CARE OF
					SUBL2	R1,R3		;BORDER CASE
					BRW	SRCH3
				ENDIF.
				BRW	SRCH2
			ENDIF.
			SUBL3	GFBUFFA,R3,GFPTR
		ELSE.		;UPPER/LOWER
			MOVL	R3,R7
SRCH4:			CMPL	R8,#2048
			IF.	*GT
				MOVL	#2048,R0
				SUBL2	R0,R8
			ELSE.
				MOVL	R8,R0
				CLRL	R8
			ENDIF.
			PUSHL	R0
			MOVTC	R0,(R7),#0,WUTAB,R0,@GOBUFFA
			POPL	R0
			MATCHC	WSLL,WSST2,R0,@GOBUFFA
			IF.	*NE		;NO MATCH
				TSTL	R8
				IF.	*NE	;NOT END BUFFER
					ADDL2	#2048,R7
					SUBL3	#1,WSLL,R1
					ADDL2	R1,R8		;THINK ABOUT
					SUBL2	R1,R7		;BORDER CASE
					BRW	SRCH4
				ENDIF.
				BRW	SRCH2
			ENDIF.
			SUBL2	GOBUFFA,R3	;NR OF BYTES FROM START
			ADDL2	R3,R7		;ADVANCE BUFFER PTR
			SUBL3	GFBUFFA,R7,GFPTR	;FOUND POINT
		ENDIF.
		SUBL2	GHCNT,GFPTR		;SET PTR AT START MATCH
	ENDIF.
	POPR	#^M<R7,R8>
	RSB
	.PAGE
;	CHECK THE RANGE  GEXP2,GEXP1
;	OUT	GFPTR = START BYTE NR
;		R0 = LENGTH
CHRA:
	BITB	#GXRNG,GSTAT
	IF.	*ON		;RANGE PRESENT
		BICB2	#GXRNG,GSTAT
		CMPL	GEXP2,GFCNT
		IF.	*GT		;PASSED END OF BUFFER
CHRA1:			MOVW	#23,GERRN
			RET
		ENDIF.
		CMPL	GEXP1,GFCNT
		IF.	*GT
			BRW	CHRA1
		ENDIF.
		SUBL3	GEXP2,GEXP1,R0
		IF.	*LTS		;NEG LL
			BRW	CHRA1
		ENDIF.
		MOVL	GEXP2,GFPTR
	ELSE.		;N LINES
		BISB2	#GXRNG,GSTAT
		MOVL	GFPTR,WFPTR	;SAVE
		BSBW	GSHIFTLR
		BICB2	#GXRNG,GSTAT
		SUBL3	WFPTR,GFPTR,R0
		IF.	*LTS		;GONE BACK
			MNEGL	R0,R0
		ELSE.
			MOVL	WFPTR,GFPTR
		ENDIF.
	ENDIF.
	RSB
	.PAGE
;	INSERT STRING ROUTINE
;	IN	GFPTR
;		R0 = LENGTH STRING
;		R1 = ADDR STRING
;
GINSRX:: PUSHR	#^M<R6,R7>
	MOVL	R0,R6
	MOVL	R1,R7
GINS1: LOCC	#CR,R0,(R1)
	IF.	*NE		;CR FOUND
		MOVB	#GCRX,(R1)+
		DECL	R0
		BRW	GINS1
	ENDIF.
	BRW	GINS2
GINSR::	PUSHR	#^M<R6,R7>
	MOVL	R0,R6
	MOVL	R1,R7
GINS2:	MOVL	GFPTR,R1
	BSBW	GMOVHOLR		;POSITION HOLE OK
	ADDL3	#100,R6,R0
	CMPL	R0,GHCNT
	IF.	*GT		;HOLE IS TOO SMALL
		ADDL2	#4095,R0
		ASHL	#12,R0,R1
		ASHL	#-12,R1,R1		;EXTEND MODULO 4K
		BSBW	GEXTHOLR
	ENDIF.
	ADDL3	GFPTR,GFBUFFA,R1
	CMPL	GFPTR,GOPTR
	IF.	*LT		;OUT START SHIFTED
		ADDL2	R6,GOPTR
	ENDIF.
	ADDL2	R6,GFCNT
	ADDL2	R6,GHPTR
	ADDL2	R6,GFPTR
	SUBL2	R6,GHCNT
	MOVL	R1,R3
	MOVL	R7,R1
GINS3:	CMPL	R6,G64K
	IF.	*GT		;MORE THAN 64K
		MOVC3	G64K,(R1),(R3)
		SUBL2	G64K,R6
		BRW	GINS3
	ENDIF.
	MOVC3	R6,(R1),(R3)	;INSERT STRING
	POPR	#^M<R6,R7>
	RSB
	.PAGE
;
;	DELETE STRING ROUTINE
;	R0 = LL TO DELETE
;	GFPTR = START ADDRESS
;
GDELR::
	PUSHR	#^M<R6>
	MOVL	R0,R6
	MOVL	GFPTR,R1
	BSBW	GMOVHOLR		;SHIFT THE HOLE
	ADDL2	R6,GHCNT
	SUBL2	R6,GFCNT
	CMPL	GHPTR,GFCNT
	IF.	*EQ		;HOLE AT END
		MOVL	#8192,GHCNT
	ENDIF.
	ENDIF.
	POPR	#^M<R6>
	RSB
	.PAGE
;	ADJUST GFPTR	NR OF LINES
;	GEXP1 = NR OF LINES TO ADJUST
;
;	OUT	R0 = 0 : END OF BUFFER WITHOUT CR
;		     1 : NOT
GSHIFTLR::
	PUSHR	#^M<R6,R7,R8>
	MOVL	GFPTR,R6
	MOVL	GEXP1,R8
	IF.	*GTS		;ADVANCE
		CMPL	R6,GHPTR
		IF.	*LT		;NOT PASSED HOLE
			MOVL	R6,R1
			BSBW	GMOVHOLR	;SHIFT THE HOLE
		ENDIF.
		SUBL3	R6,GFCNT,R7		;LENGTH TO SCAN
		IF.	*EQ		;AT END OF SCREEN
			BICB2	#GXRNG,GSTAT
			MOVW	#20,GERRN
			RET
		ENDIF.
		ADDL2	GHCNT,R6
		ADDL3	GFBUFFA,R6,R1
SHIF0:		CMPL	R7,G64K
		IF.	*GT
			MOVW	G64K,R0
			SUBL2	G64K,R7
		ELSE.
			MOVL	R7,R0
			CLRL	R7
		ENDIF.
SHIF1:		LOCC	#GCRX,R0,(R1)
		IF.	*NE		;CR FOUND
			INCL	R1
			SUBL3	GFBUFFA,R1,R6
			DECW	R0
			SOBGTR	R8,SHIF1	;MORE LINES TOO DO
			MOVL	#1,R0
		ELSE.
			TSTL	R7
			IF.	*NE		;NOT END OF BUFFER
				BRW	SHIF0
			ENDIF.
			CMPL	R8,#1
			IF.	*NE		;NOT LAST LINE
				BITB	#GXRNG,GSTAT
				IF.	*OFF
					MOVW	#20,GERRN
					RET
				ENDIF.
			ENDIF.
			SUBL3	GFBUFFA,R1,R6
		ENDIF.
		SUBL3	GHCNT,R6,GFPTR		;ADJUST /\
	ELSE.
		CMPL	R6,GHPTR
		IF.	*GT		;HOLE BEFORE PTR
			MOVL	R6,R1
			BSBW	GMOVHOLR	;SHIFT THE HOLE
		ENDIF.
		ADDL2	GFBUFFA,R6
		MOVL	GFPTR,R7	;LENGTH TO SCAN
		MNEGL	R8,R8
		INCL	R8		;ONE MORE
SHIF2:		TSTL	R7
		IF.	*EQ		;START OF BUFFER
			DECL	R8
			IF.	*NE	;NOT FAR ENOUGH
				BITB	#GXRNG,GSTAT
				IF.	*OFF
					MOVW	#20,GERRN
					RET
				ENDIF.
			ENDIF.
		ELSE.
SHIF3:			DECL	R6
			CMPB	(R6),#GCRX
			IF.	*NE		;NO CR
				SOBGTR	R7,SHIF3
				BRW	SHIF2
			ELSE.		;CR FOUND
				DECL	R7
				SOBGTR	R8,SHIF2
				INCL	R6
			ENDIF.
		ENDIF.
		SUBL3	GFBUFFA,R6,GFPTR
		MOVL	#1,R0		;NOT END OF BUFFER
	ENDIF.
	POPR	#^M<R6,R7,R8>
	RSB
WFPTR:	.BLKL
ESC=27
CR=13
	.END