A2osX/SYS/KERNEL.S.PFT.txt

NEW
  AUTO 3,1
*--------------------------------------
PFT.CheckPath1	ldy #1
				.HS 2C					BIT ABS
PFT.CheckPath2	ldy #2
				.HS 2C					BIT ABS
PFT.CheckPath4	ldy #4

				lda (pStack),y
				pha
				iny
				lda (pStack),y
				ply

PFT.CheckPathYA	>PUSHYA

				stx .6+1				Save SYSCALL #

				>PUSHWI K.Buf256
				>SYSCALL2 realpath
				bcs PFT.RTS

				ldx #0

.1				inx
				lda Flt.Table.pftHI-1,x
				beq .8

				sta ZPPtr1+1

				lda Flt.Table.pftLO-1,x
				sta ZPPtr1

				ldy #$ff

.2				iny
				lda (ZPPtr1),y			"/FILTER\0"
				beq .3					end of filter string....

				cmp K.Buf256,y			can be \0
				beq .2

				bra .8

.3				lda K.Buf256,y
				beq .4					path is "/FILTER" ?

				cmp #'/'				path is "/FILTER/..." ?
				bne .8

				iny

.4				lda Flt.Table.cbLO-1,x
				sta .7+1

				lda Flt.Table.cbHI-1,x
				sta .7+2

				stx hHandler

				pla						discard JSR return @
				pla

				lda /K.Buf256			pass full path to handler

.6				ldx #$ff				SELF MODIFIED SYSCALL #

.7				jmp $ffff				SELF MODIFIED

.8				cpx #K.FLT.MAX
				bne .1

				>LDYAI K.Buf256
*--------------------------------------
PFT.YAToMLIPATH	>STYA .1+1

				ldx #0					no filter, prodos path

.1				lda  $ffff,x			SELF MODIFIED
				beq .2

				inx
				sta K.MLI.PATH,x
				cpx #MLI.MAXPATH
				bne .1

.2				stx K.MLI.PATH
				inx
				stz K.MLI.PATH,x		Make ending 0 for /dev/xxx path

				>LDYAI K.MLI.PATH
				>STYA K.MLI.PARAMS+1

				clc
PFT.RTS			rts
*--------------------------------------
PFT.CheckNode4	ldy #4

PFT.CheckNodeY	lda (pStack),y

PFT.CheckNodeA	stx .80+1				Save SYSCALL #
				sta IO.hFILE

				tax
				beq .9

				cpx #K.hFD.MAX+1
				bcs .9

				lda hFDs-1,x
				beq .9

				jsr DEV.GetPFD

				ldy #S.FD.PFT
				lda (pFD),y
				beq .8					Handler is 0, back to kernel....

				tax

				lda Flt.Table.cbLO-1,x
				sta .7+1

				lda Flt.Table.cbHI-1,x
				sta .7+2

				stx hHandler

				pla						discard JSR return @
				pla
				ldx .80+1				restore SYSCALL #
				lda IO.hFILE

.7				jmp $ffff				SELF MODIFIED

.8				lda (pFD)				#S.FD.T
				cmp #S.FD.T.CDEV
				bcs .80

				ldy #S.FD.REG.REF		REG or DIR
				lda (pFD),y
				sta K.MLI.PARAMS+1

.80				ldx #$ff				SELF MODIFIED
.81				lda IO.hFILE
				clc

.99				rts

.9				lda #E.INVH
				sec
				rts
*--------------------------------------
MAN
SAVE usr/src/sys/kernel.s.pft
LOAD usr/src/sys/kernel.s
ASM