antoine-source/appleworksgs/Spell/Src/LEXASM.s

		CASE	OBJECT 

;------------------------------------------
;
; Equates from procedure lexcmp
;
;------------------------------------------
FLAGSIND	equ $ff
;------------------------------------------
;
; Equates from procedure lexstrip
;
;------------------------------------------
IW_COMMON	equ 1
IW_TAG	equ $80
;------------------------------------------
;
; Equates from procedure lexphon
;
;------------------------------------------
NPHON	equ 58
E_LRIND	equ 4
;------------------------------------------
;
; Equates from procedure lexbinnext
;
;------------------------------------------
NUMBACK	equ 16

;-----------------------------------------------
;
;   Imported addresses
;
;-----------------------------------------------

	IMPORT	Lexblkptr
	IMPORT	Lexbs
	IMPORT	Lexdelta
	IMPORT	Lexgramtab
	IMPORT	Lexminbsd
	IMPORT	Lexmingrm
	IMPORT	Scendptr
	IMPORT	Scfdecomp
	IMPORT	Sctag
	IMPORT	lexnextblk
	IMPORT	strecpy
*****************************************************************
*
*   LEXASM.SRC - Various routines from lex.src I hand-coded
*
*   Robert A. Hearn
*
*****************************************************************

	LOAD 'macros.dump'

*****************************************************************

lexcmp	PROC		EXPORT


		input	str1:l,str2:l
		output   result:w
		begin
		lda #0
		shortm

loop	lda [str2]
		beq done
		cmp [str1]
		bne different
		longm
		inc str1
		inc str2
		shortm
		bra loop

different	cmp #FLAGSIND
		beq done
		cmp [str1]
		bmi done
		longm
		moveword #-1,result
		bra really

done	lda [str1]
		longm
		sta result
really	return

		ENDP

*****************************************************************

lexstrip	PROC		EXPORT


		input eptr:l
		local fptr:l

		begin

		dec eptr
		dec eptr
		movelong #Scfdecomp,fptr
		stz Sctag

		lda [eptr]
		and #$ff
		cmp #FLAGSIND
		beq loop1
		moveword #IW_COMMON,Scfdecomp
		brl done

loop1	dec eptr
		dec eptr
		lda [eptr]
		and #$ff
		cmp #FLAGSIND
		beq loop1
		inc eptr
		inc eptr

goahead	lda [eptr]
		and #$ff00
		sta [eptr]
		inc eptr

loop2	lda [eptr]
		and #$ff
		tax
		and #IW_TAG
		beq else
		stx Sctag
		bra next
else	txa
		sta [fptr]
		inc fptr
next	inc eptr
		lda [eptr]
		inc eptr
		and #$ff
		bne loop2

		moveword #0,[fptr]

		lda Scfdecomp
		and #$ff
		bne done
		moveword #IW_COMMON,[fptr]

done	return

		ENDP

*****************************************************************

lexphon	PROC		EXPORT


		local endptr:l,blkptr:l,ptr:l,gramtab:l

		begin

		movelong Scendptr,endptr
		movelong Lexblkptr,blkptr
loop	lda [blkptr]
		inc blkptr
		and #$ff
		tax
		jeq iszero
;		{
		if_ x,<EFBFBD>,#NPHON,else1
;		{
		sta [endptr]
		inc endptr
		if_ x,<EFBFBD>,#E_LRIND,loop
;		{
		shortm
		while_ [blkptr],<EFBFBD>,#FLAGSIND
;		{
		sta [endptr]
		longm
		inc blkptr
		inc endptr
		shortm
;		}
		endwhile_
		longm
;		}
		bra loop
;		}
else1	if_ x,<,Lexmingrm,iszero
		if_ x,<EFBFBD>,#FLAGSIND,else2
;		{
		movelong Lexgramtab,gramtab
		txa
		asl a
		tay
		moveword [gramtab]:y,[endptr]
		inc endptr
		inc endptr
		brl loop
;		}
else2	;{
		txa
		sta [endptr]
		inc endptr
		moveword [blkptr],[endptr]
		inc blkptr
		inc endptr
;		}
		brl loop
;		}
iszero	lda #0
		shortm
		sta [endptr]
		longm
		lda endptr
		sta Scendptr
		lda blkptr
		dec a
		sta Lexblkptr

		pushlong endptr
		call lexstrip

		return

		ENDP

*****************************************************************

lexbinnext	PROC		EXPORT


		output result:w
		local blkptr:l,temp:w,tptr:l

		begin

		movelong Lexblkptr,blkptr

		lda [blkptr]
		inc blkptr
		and #$ff
		bne _ok
		call lexnextblk
		sta result
		brl done

_ok		cmp Lexminbsd
		bpl else
		sec
		sbc #NPHON
		sta temp
		lda Scendptr
		sbc temp
		sta Scendptr
		lda #NUMBACK-1
		cmp temp
		bne around
		lda [blkptr]
		inc blkptr
		and #$ff
		sec
		sbc #NPHON
		sta temp
		lda Scendptr
		sbc temp
		sta Scendptr
		bra around

else	tax
		asl a
		asl a
		tay
		movelong Lexdelta,tptr
		pushlong [tptr]:y
		txy
		movelong Lexbs,tptr
		lda [tptr],y
		and #$ff
		sta temp
		pushword Scendptr+2
		lda Scendptr
		sec
		sbc temp
		pha
		call strecpy
		ply
		ply
		ply
		ply
		sta Scendptr
		stx Scendptr+2

around	movelong blkptr,Lexblkptr
		call lexphon
		moveword #1,result

done	return

		ENDP
		END