A2osX/SYS/KERNEL.S.DIR.txt

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
				.LIST OFF
*--------------------------------------
* In :
*  X = #SYSCall 
*  Y,A = PATH (PSTR)
* Out : 
*  CC : Y,A = PTR to S.DIR
*  CS : A = EC
*--------------------------------------
K.OPENDIRYA		jsr S.PFTCHECKPATHYA
				>STYA ZPQuickPtr2
				>STYA MLICALL.PARAMS+1	For MLIOPEN
				
				>PUSHWI S.DIR.PRODOS
				>PUSHBI S.MEM.F.INIT0
				jsr K.GetMem
				bcs .9
				
				>STYA ZPQuickPtr1
				stx hDIR
						
				lda (ZPQuickPtr2)
				cmp #1					One char ?
				bne .7					No, Go open dir....
				tay						Y=1
				lda (ZPQuickPtr2),y
				cmp #'/'				Root required ?
				beq .8					Yes, Go for ONLINE Call (S.DIR.PRODOS.REF=0)
				
				lda #SYSMGR.ERRSYN
				sec
.9				rts
				
.7				>PUSHWI 1024			get a ProDOS IOBUF
				>PUSHBI S.MEM.F.ALIGN+S.MEM.F.NOMOVE
				jsr K.GetMem
				bcs .98
				
				>STYA MLICALL.PARAMS+3	Save Ptr to IOBUF for MLIOPEN call
				txa
				ldy #S.DIR.PRODOS.IOBUF
				sta (ZPQuickPtr1),y
				
				>MLICALL MLIOPEN
				bcs .98
				
				lda MLICALL.PARAMS+5	get ref_num
				ldy #S.DIR.PRODOS.REF
				sta (ZPQuickPtr1),y				

.8				lda hDIR
				clc
				rts
				
.98				pha						save MLI error
				jsr K.CLOSEDIRA.1
				pla						get back MLI error				
				sec
.99				rts
*--------------------------------------				
hDIR			.BS 1				
*--------------------------------------
* In : 
*  A = hDIR
* Out : 
*  CC : X = hDIREND, Y,A = PTR to S.DIRENT
*  CS : A = EC, A = 0 : no more entry
*--------------------------------------
K.READDIRA		jsr S.PFTCHECKDIRA
				jsr K.GetMemPtrA
				>STYA ZPQuickPtr1
				
				ldy #S.DIR.F
				lda (ZPQuickPtr1),y
				and #S.DIR.F.NOMORE
				bne .9
				
				ldy #S.DIR.PRODOS.REF
				lda (ZPQuickPtr1),y
				beq K.READDIRA.ROOT
				jmp K.READDIRA.DIR
				
.9				lda #0
				sec						CS,A=0 no more entry
K.READDIRA.RTS	rts
				
K.READDIRA.ROOT	stz MLICALL.PARAMS+1	All Volumes
				>LDYAI KrnBuffer256
				>STYA MLICALL.PARAMS+2
				>STYA ZPQuickPtr2		For PASS #2
				>MLICALL MLIONLINE
				bcs K.READDIRA.RTS
				
				lda #1					+1 for Ending 0
				sta	BufSize
				stz BufSize+1
				
				ldy #0
				
.1				lda KrnBuffer256,y
				and #$0F
				beq .2
				
				sec						Add Filelen +1
				adc BufSize
				sta BufSize
				bcc .11
				inc BufSize+1

.11				lda #S.STAT
				adc BufSize
				sta BufSize
				bcc .12
				inc BufSize+1

.12				inx
								
.2				tya
				clc
				adc #16
				tay
				bcc .1					loop until 256 bytes scanned
				
				txa
				beq	K.READDIRA.RTS		A=0, CS no more DIRENT

				sta EntryCount
				
				>PUSHW BufSize
				>PUSHBI S.MEM.F.INIT0
				jsr K.GetMem
				bcs K.READDIRA.RTS
				stx hDIRENT
				>STYA ZPQuickPtr3
				>STYA ZPQuickPtr4
				
.3				lda (ZPQuickPtr2)
				and #$0F
				beq .88
				tay
				tax
				sta (ZPQuickPtr3)
				inc
				sta VolName			Build a string with leading / for GetFileInfo
				
.4				lda (ZPQuickPtr2),y
				sta (ZPQuickPtr3),y
				sta VolName+1,y
				dey
				bne .4
				lda #'/'
				sta VolName+1
				
				txa
				sec
				adc ZPQuickPtr3
				sta ZPQuickPtr3
				bcc .41
				inc ZPQuickPtr3+1
				
.41				>LDYAI VolName
				>STYA MLICALL.PARAMS+1
				>MLICALL MLIGETFILEINFO
				bcs .80
				
				lda MLICALL.PARAMS+S.FILEINFO.ACCESS
				cmp #S.FILEINFO.ACCESS.FULL
				bne .5
				
				lda #S.STAT.MODE.XO+S.STAT.MODE.WO+S.STAT.MODE.RO
				bra .6
				
.5				and #S.FILEINFO.ACCESS.R
				beq .6
				lda #S.STAT.MODE.XO+S.STAT.MODE.RO	
				
.6				ldy #S.STAT.MODE				
				sta (ZPQuickPtr3),y

				ldy #S.STAT.BLOCKS
				lda MLICALL.PARAMS+S.FILEINFO.AUXTYPE
				sta (ZPQuickPtr3),y
				iny
				lda MLICALL.PARAMS+S.FILEINFO.AUXTYPE
				sta (ZPQuickPtr3),y
				ldy #S.STAT.BLKSIZE+1
				lda #2						Block size is $200 for ProDOS
				sta (ZPQuickPtr3),y
				
.80				lda ZPQuickPtr3
				clc
				adc #S.STAT
				sta ZPQuickPtr3
				bcc .88
				inc ZPQuickPtr3+1
				
.88				lda ZPQuickPtr2
				clc
				adc #16
				sta ZPQuickPtr2
				bcc .89
				inc ZPQuickPtr2+1
.89				dec EntryCount
				bne .3

				lda #0
				sta (ZPQuickPtr3)			Ending 0
				
				ldy #S.DIR.F
				lda #S.DIR.F.NOMORE
				sta (ZPQuickPtr1),y
				
				ldx hDIRENT
				>LDYA ZPQuickPtr4
				clc
				rts
*--------------------------------------
K.READDIRA.DIR  ldy #S.DIR.PRODOS.REF
				lda (ZPQuickPtr1),y
				sta MLICALL.PARAMS+1

				>PUSHWI 512				Get a 512 bytes buffer for reading dir...
				>PUSHBI 0
				jsr K.GetMem
				bcs .99
				stx K.READDIRA.hMem
				
				>STYA MLICALL.PARAMS+2	For reading
				
				pha
				tya
*				clc						CC from  K.GetMem
				adc #4					Skip 4 bytes linked list		
				tay
				pla
				adc #0
				
				>STYA ZPQuickPtr2		PTR to Buffer for PASS #1
				>STYA ZPQuickPtr3		PTR to Buffer for PASS #2
				
				>LDYAI 512
				>STYA MLICALL.PARAMS+4
				>MLICALL MLIREAD		Read A block from directory
				bcs .98
				
				ldy #S.DIR.PRODOS.EL	Check if first run....
				lda (ZPQuickPtr1),y
				bne .2					no, we have all we need....
				
				ldy #$23+3
.1				lda (ZPQuickPtr2),y		Get EntryLength....	From Block
				sta EntryLength-$23,y
				dey
				bpl .1
				bra .4

.98				pha
				lda K.READDIRA.hMem
				jsr K.FreeMemA
				pla
				sec
.99				rts
				
.2				ldy #S.DIR.PRODOS.EL+3

.3				lda(ZPQuickPtr1),y		get this session parameters from S.DIR
				sta EntryLength-S.DIR.PRODOS.EL,y
				dey
				bpl .3
				
.4				ldx EntryCount
				cpx EntryPerBlock

				lda EntryCount+1
				sbc #0
				bcc	.5					We have less than EPB to read
				ldx EntryPerBlock
				
.5				stx EntryCountIB
				stz EntryCount2Return

				lda #1					For Ending 0
				sta BufSize
				stz BufSize+1
				
* pass #1 compute BufSize.....	
			
.51				lda (ZPQuickPtr2)		X = EntryCount In This Block
				beq .7					Free slot....goto next
				
				jsr S.READDIR.CHK

.7				lda ZPQuickPtr2
				clc
				adc EntryLength
				sta ZPQuickPtr2
				bcc .71
				inc ZPQuickPtr2+1
				
.71				dex
				bne .51
				
* pass #2 Fill Buffer...
				
				>PUSHW BufSize				Get a BufSize bytes buffer for storing results
				>PUSHBI S.MEM.F.INIT0		make sure 0 fiiled
				jsr K.GetMem
				bcs .98
				stx K.READDIRA.hDIR
				>STYA ZPQuickPtr4
				
.72				jsr DecEntryCount
				bcc .80						no more file to list...
				
				lda (ZPQuickPtr3)
				beq .78

				jsr K.READDIRA.ADD

.78				lda ZPQuickPtr3
				clc
				adc EntryLength
				sta ZPQuickPtr3
				bcc .79
				inc ZPQuickPtr3+1	

.79				dec EntryCountIB
				beq .72
				
.80				
*				lda #0					S.MEM.F.INIT0 already did this
*				sta (ZPQuickPtr4)		Ending 0

				ldy #S.DIR.PRODOS.EL+3
.8				lda EntryLength-S.DIR.PRODOS.EL,y	Store back this session prameters to S.DIR
				sta (ZPQuickPtr1),y
				dey
				bpl .8
				
				jsr .98					Discard READBUFFER
				
				lda K.READDIRA.hDIR
				tax
				jsr K.GetMemPtrA
				clc
				rts
*--------------------------------------
S.READDIR.CHK	tay						save LEN
				
				and #$F0				get storage_type
				cmp #$E0				directory header ?
				bne .1
				
				inc EntryCount2Return	yes, return 2 ".."
				lda #S.STAT+3			add "#.." string + S.STAT
				jsr K.READDIRA.AddBufSize
				bra .2					go add "." Entry
				
				
.1				cmp #$F0				Volume header ?
				bne .3
				
.2				lda #S.STAT+2			add "#." string + S.STAT
				bra .4
				
.3				tya
				and #$F					get filename len
				sec						Add 1 for LEN
				adc #S.STAT
				
.4				jsr K.READDIRA.AddBufSize
				inc EntryCount2Return
				rts
*--------------------------------------
K.READDIRA.ADD	and #$F0
				cmp #$F0				Volume header ?
				bne .10
				
				lda #1
				jsr K.READDIRA.AddToBuf
				lda #'.'
				jsr K.READDIRA.AddToBuf
				
				ldy #$25				total_blocks
				lda (ZPQuickPtr3),y
				tax
				iny
				lda (ZPQuickPtr3),y
				
				ldy #S.STAT.BLOCKS+1
				sta (ZPQuickPtr4),y
				dey
				txa
				sta (ZPQuickPtr4),y
				
.10				cmp #$E0				directory header ?
				bne .20
				
				lda #2
				jsr K.READDIRA.AddToBuf
				lda #'.'
				jsr K.READDIRA.AddToBuf
				jsr K.READDIRA.AddToBuf
				
				
				
				
.20				cmp #$D0				directory ?
				bne .30

				lda (ZPQuickPtr3)
				and #$0F				get filename len
				tax
				jsr K.READDIRA.AddToBuf
				ldy #1
				
.21				lda (ZPQuickPtr3),y			
				jsr K.READDIRA.AddToBuf
				iny
				dex
				bne .21
				
				
.30				

.80				lda ZPQuickPtr4
				clc
				adc #S.STAT
				sta ZPQuickPtr4
				bcc .8
				inc ZPQuickPtr4+1
.8				rts
*--------------------------------------
K.READDIRA.AddBufSize
				clc
				adc BufSize
				sta BufSize
				bcc .9
				inc BufSize+1
.9				rts
*--------------------------------------
K.READDIRA.AddToBuf
				sta (ZPQuickPtr4)
				inc ZPQuickPtr4
				bne .8
				inc ZPQuickPtr4+1
.8				rts
*--------------------------------------
DecEntryCount	lda EntryCount
				sec
				sbc #1
				sta EntryCount
				bcs .9					CS, 0 or more
				lda EntryCount+1
				sbc #0
				sta EntryCount+1		CC, we reached $ffff
.9				rts				
*--------------------------------------
K.READDIRA.hMem	.BS 1
K.READDIRA.hDIR	.BS 1
*--------------------------------------
* In : 
*  A = hDIR
*--------------------------------------
K.CLOSEDIRA		jsr S.PFTCHECKDIRA
				sta hDIR
				jsr K.GetMemPtrA
				>STYA ZPQuickPtr1
				
K.CLOSEDIRA.1	ldy #S.DIR.PRODOS.REF
				lda (ZPQuickPtr1),y
				beq .1
				sta MLICALL.PARAMS+1
				>MLICALL MLICLOSE
				
.1				ldy #S.DIR.PRODOS.IOBUF				
				lda (ZPQuickPtr1),y
				beq .2
				jsr K.FreeMemA
				
.2				lda hDIR
				jsr K.FreeMemA
				clc
				rts
*--------------------------------------
K.MKDIRYA		jsr S.PFTCHECKPATHYA
				>STYA MLICALL.PARAMS+1
				lda #S.FILEINFO.ACCESS.FULL
				sta MLICALL.PARAMS+S.FILEINFO.ACCESS
				lda #S.FILEINFO.TYPE.DIR
				sta MLICALL.PARAMS+S.FILEINFO.TYPE
				lda #S.FILEINFO.STORETYPE.DIR
				sta MLICALL.PARAMS+S.FILEINFO.STORETYPE	
				>MLICALL MLICREATE
				rts
*--------------------------------------
hONLINE			.BS 1
hDIRENT			.BS 1
BufSize			.BS 2
EntryLength		.BS 1
EntryPerBlock	.BS 1
EntryCount		.BS 2
EntryCountIB	.BS 1
EntryCount2Return	.BS 1

VolName			.BS 17
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.DIR
LOAD SYS/KERNEL.S
ASM