A2osX/SYS/KERNEL.S.SLISTX.txt

NEW
  AUTO 3,1
*--------------------------------------
ZPSListKeyID	.EQ ZPMEMMGR+6
ZPSListDataPtr 	.EQ ZPMEMMGR+8
ZPSListDataLen 	.EQ ZPMEMMGR+10
ZPSListIBlkPtr	.EQ ZPMEMMGR+12
ZPSListDBlkPtr 	.EQ ZPMEMMGR+14			
*/--------------------------------------
* # SListGetData
* ## ASM
* `PUSHW DataOfs` (Start offset in Data)
* `PUSHW DataLen` (Data bytes to return, 0 if String mode)
* `PUSHW DataPtr` (0 if KERNEL should allocate a buffer)
* `PUSHW KeyID`
* `lda hSList`
* `>SYSCALL SListGetData`
* ## RETURN VALUE
*  Y,A = Byte Count
*  X = hMem (if DataPtr = 0)
*\--------------------------------------
K.SListGetData	sta SLIST.hList

				jsr SHARED.PullYA
				>STYA ZPSListKeyID
				jsr SHARED.PullYA
				>STYA ZPSListDataPtr
				jsr SHARED.PullYA
				>STYA ZPSListDataLen
				jsr SHARED.PullYA
				>STYA ZPMemMgrSize

				jsr SLIST.Select
				jsr SLIST.SkipKey
				jsr SLIST.GetDataLen

				lda SLIST.DataLen
				sec
				sbc ZPMemMgrSize		Offset
				eor #$ff
				sta SLIST.nDataCnt

				lda SLIST.DataLen+1
				sbc ZPMemMgrSize+1
				eor #$ff
				sta SLIST.nDataCnt+1	Data remaining

				bcc .99					Offset Beyond DataLen

.10				lda ZPMemMgrSize		Skip to Offset
				ldx ZPMemMgrSize+1
				jsr SLIST.SkipDataAX

				lda ZPSListDataPtr
				ora ZPSListDataPtr+1
				bne .12

				>LDYA SLIST.DataLen

				iny
				bne .11
				inc						+1 for ending 0

.11				ldx #SYS.GetMem
				jsr K.SYSCALL2.MAIN		!!!	Get a buffer In MAIN Mem !!!
				bcs .9
				stx .82+1
				>STYA ZPSListDataPtr

.12				lda ZPSListDataLen
				ora ZPSListDataLen+1
				sec
				beq .1					String Mode

				lda ZPSListDataLen
				eor #$ff
				sta SLIST.nBufCnt
				lda ZPSListDataLen+1
				eor #$ff
				sta SLIST.nBufCnt+1
				clc

.1				ror SLIST.bStringMode

				stz ZPSListDataLen
				stz ZPSListDataLen+1

.2				inc SLIST.nDataCnt
				bne .3
				inc SLIST.nDataCnt+1
				beq .8

.3				bit SLIST.bStringMode
				bmi .4					String mode : until CR
				
				inc SLIST.nBufCnt
				bne .4
				inc SLIST.nBufCnt+1
				beq .8

.4				jsr SLIST.GetNextByte
				bit SLIST.bStringMode
				bpl .5
				cmp #C.CR
				beq .8
.5				jsr SHARED.SetDataByte
				inc ZPSListDataLen
				bne .2
				inc ZPSListDataLen+1
				bra .2

.99				lda #E.EMPTYKEY
				sec
.9				rts

.8				lda #0
				jsr SHARED.SetDataByte
.81				>LDYA ZPSListDataLen
.82				ldx #$ff				SELF MODIFIED
				clc
				rts
*/--------------------------------------
* # SListAddData
* ## ASM
* `PUSHW DataLen`
* `PUSHW DataPtr`
* `PUSHW KeyID`
* `lda hSList`
* `>SYSCALL SListAddData`
* ## RETURN VALUE
*\--------------------------------------
K.SListAddData	sta SLIST.hList

				jsr SHARED.PullYA
				>STYA ZPSListKeyID
				jsr SHARED.PullYA
				>STYA ZPSListDataPtr
				jsr SHARED.PullYA
				>STYA ZPSListDataLen

				jsr SLIST.Select
				jsr SLIST.SkipKey
				>LDYA SLIST.KeyID		Save DataLen location
				>STYA ZPSListKeyID		to update later

				ldy SLIST.BytePtr
				lda (ZPSListDBlkPtr),y
				pha
				clc
				adc ZPSListDataLen
				sta (ZPSListDBlkPtr),y
				php
				jsr SLIST.ToNextByte	skip LEN lo

				plp
				ldy SLIST.BytePtr
				lda (ZPSListDBlkPtr),y
				pha
				adc ZPSListDataLen+1
				sta (ZPSListDBlkPtr),y
				jsr SLIST.ToNextByte	skip LEN hi

				plx
				pla
				jsr SLIST.SkipDataAX
				lda ZPSListDataLen
				eor #$ff
				sta ZPSListDataLen

				lda ZPSListDataLen+1
				eor #$ff
				sta ZPSListDataLen+1

.1				inc ZPSListDataLen
				bne .2
				inc ZPSListDataLen+1
				beq .8
.2				jsr SHARED.GetDataByte
				jsr SLIST.AddBlockByte
				bcc .1
				rts

.8				lda #0
				jsr SLIST.AddBlockByte	Add an extra 0 to stop Search here
				clc
				rts
*/--------------------------------------
* # SListSetData
* ## ASM
* `PUSHW DataLen`
* `PUSHW DataPtr`
* `PUSHW KeyID`
* `lda hSList`
* `>SYSCALL SListSetData`
* ## RETURN VALUE
*\--------------------------------------
K.SListSetData	sta SLIST.hList
				jsr SHARED.PullYA
				>STYA ZPSListKeyID
				jsr SHARED.PullYA
				>STYA ZPSListDataPtr
				jsr SHARED.PullYA
				>STYA ZPSListDataLen

				jsr SLIST.Select
				jsr SLIST.SkipKey
				jsr SLIST.GetDataLen

				lda SLIST.DataLen
				cmp ZPSListDataLen
				bne .9
				ldx SLIST.DataLen+1
				cpx ZPSListDataLen+1
				bne .9

				eor #$ff
				sta SLIST.nDataCnt
				txa
				eor #$ff
				sta SLIST.nDataCnt+1
.1				inc SLIST.nDataCnt
				bne .2
				inc SLIST.nDataCnt+1
				beq .8
.2				jsr SHARED.GetDataByte
				jsr SLIST.SetBlockByte
				bra .1

.8				clc
				rts
.9				lda #E.DATALEN
				sec
				rts
*/--------------------------------------
* # SListGetByID
* ## ASM
* `PUSHW KeyPtr`
* `PUSHW KeyID`
* `lda hSList`
* `>SYSCALL SListGetByID`
* ## RETURN VALUE
*  Y,A = Next KeyID
*\--------------------------------------
K.SListGetByID	sta SLIST.hList

				jsr SHARED.PullYA
				>STYA ZPSListKeyID
				jsr SHARED.PullYA
				>STYA ZPSListDataPtr

				jsr SLIST.Select

				jsr SLIST.GetNextByte
				tax
				beq .9
				ldy #0
.1				phy
				jsr SLIST.GetNextByte
				ply
				jsr SHARED.SetKeyCharY
				iny
				dex
				bne .1
				txa 					lda #0
				jsr SHARED.SetKeyCharY

				jsr SLIST.SkipData
				>LDYA SLIST.KeyID
				clc
				rts
.9				lda #E.NOKEY
				sec
				rts
*/--------------------------------------
* # SListNewKey
* ## ASM
* `PUSHW KeyPtr`
* `lda hSList`
* `>SYSCALL SListNewKey`
* ## RETURN VALUE
*  Y,A = KeyID
*  X = KeyLen
*\--------------------------------------
K.SListNewKey	sta SLIST.hList
				jsr SHARED.PullYA
				>STYA ZPSListDataPtr

				jsr SLIST.Search
				bcc .99
				lda SLIST.KeyLen
				jsr SLIST.AddBlockByte
				bcs .9
				ldy #0
.1				jsr SHARED.GetKeyCharY
				jsr SLIST.AddBlockByte
				bcs .9
				iny
				cpy SLIST.KeyLen
				bne .1
				lda #0					Data Len = 0
				jsr SLIST.AddBlockByte
				bcs .9
				lda #0
				jsr SLIST.AddBlockByte
				bcs .9
				lda #0					Next Len = 0
				jsr SLIST.AddBlockByte
				bcs .9

				>LDYA ZPSListKeyID
				ldx SLIST.KeyLen
				clc
				rts
.99				lda #E.DUPKEY
				sec
.9				rts
*/--------------------------------------
* # SListLookup
* ## ASM
* `PUSHW KeyPtr`
* `lda hSList`
* `>SYSCALL SListLookup`
* ## RETURN VALUE
*  Y,A = KeyID
*  X = Key Length
*\--------------------------------------
K.SListLookup	sta SLIST.hList

				jsr SHARED.PullYA
				>STYA ZPSListDataPtr

				jsr SLIST.Search
				bcs .9

				>LDYA ZPSListKeyID
				ldx SLIST.KeyLen
.9				rts
*/--------------------------------------
* # SListNew
* ## ASM
* `>SYSCALL SListNew`
* ## RETURN VALUE
* A=hSList
*\--------------------------------------
K.SListNew		>LDYAI 160				40k Max before out of memory!!!
				jsr K.GetMem0
				bcs .9
				>STYA ZPSListIBlkPtr
				stx .8+1
				>LDYAI 256
				jsr K.GetMem
				bcs .9
				>STYA ZPSListDBlkPtr
				lda #0
				sta (ZPSListDBlkPtr)
				txa
				sta (ZPSListIBlkPtr)
.8				lda #$ff				SELF MODIFIED
.9				rts
*/--------------------------------------
* # SListFree
* ## ASM
* `lda hSList`
* `>SYSCALL SListFree`
* ## RETURN VALUE
*\--------------------------------------
K.SListFree		sta .8+1

				jsr K.GetMemPtr
				>STYA .1+1
				ldx #0
.1				lda $ffff,x				SELF MODIFIED
				beq .8
				jsr K.FreeMem
				inx
				bra .1
.8				lda #$ff				SELF MODIFIED
				jmp K.FreeMem
*--------------------------------------
* 				PRIVATE
*--------------------------------------
SLIST.Search	lda SLIST.hList
				jsr K.GetMemPtr
				>STYA ZPSListIBlkPtr

				lda (ZPSListIBlkPtr)			
				jsr K.GetMemPtr
				>STYA ZPSListDBlkPtr
				ldy #$ff

.1				iny
				jsr SHARED.GetKeyCharY
				bcc .1
				sty SLIST.KeyLen

				stz SLIST.BytePtr
				stz SLIST.BlockPtr
.2				>LDYA SLIST.KeyID
				>STYA ZPSListKeyID
				ldy SLIST.BytePtr
				lda (ZPSListDBlkPtr),y
				beq .9
				cmp SLIST.KeyLen
				bne .5
				jsr SLIST.GetNextByte	Skip Len
				ldy #0
.3				phy
				jsr SLIST.GetNextByte
				sta .4+1
				ply
				jsr SHARED.GetKeyCharY
.4				cmp #$ff				SELF MODIFIED
				bne .5

				iny
				cpy SLIST.KeyLen
				bne .3
				clc
				rts
.5				jsr SLIST.Select.I		move back to ZPSListKeyID
				jsr SLIST.Next			
				bra	.2
.9				lda #E.NOKEY
				sec
				rts
*--------------------------------------
SLIST.Select	lda SLIST.hList
				jsr K.GetMemPtr
				>STYA ZPSListIBlkPtr

SLIST.Select.I	ldy ZPSListKeyID+1
				sty SLIST.BlockPtr
				lda (ZPSListIBlkPtr),y
				jsr K.GetMemPtr
				>STYA ZPSListDBlkPtr
				lda ZPSListKeyID
				sta SLIST.BytePtr
				rts
*--------------------------------------
SLIST.Next		jsr SLIST.SkipKey

SLIST.SkipData	jsr SLIST.GetDataLen
		
				lda SLIST.DataLen
				ldx SLIST.DataLen+1
SLIST.SkipDataAX
				clc
				adc SLIST.BytePtr
				sta SLIST.BytePtr
				txa
				adc SLIST.BlockPtr
				sta SLIST.BlockPtr
				tay
				lda (ZPSListIBlkPtr),y
				jsr K.GetMemPtr
				>STYA ZPSListDBlkPtr

				rts
*--------------------------------------
SLIST.SkipKey	ldy SLIST.BytePtr
				lda (ZPSListDBlkPtr),y	Get KeyLen
				sec
				adc SLIST.BytePtr
				sta SLIST.BytePtr
				bcs SLIST.ToNextBlock
.8				rts
*--------------------------------------
SLIST.GetDataLen
				jsr SLIST.GetNextByte	Get DataLenLo
				sta SLIST.DataLen
				jsr SLIST.GetNextByte	Get DataLenHI
				sta SLIST.DataLen+1
				rts
*--------------------------------------
SLIST.GetNextByte
				ldy SLIST.BytePtr
				lda (ZPSListDBlkPtr),y
SLIST.ToNextByte
				inc SLIST.BytePtr
				bne .8

				pha
				jsr SLIST.ToNextBlock
				pla
.8				rts
*--------------------------------------
SLIST.AddBlockByte
				phy
				ldy SLIST.BytePtr
				sta (ZPSListDBlkPtr),y
				inc SLIST.BytePtr
				bne .8
				phx
				>LDYAI 256
				jsr K.GetMem
				bcs .9
				>STYA ZPSListDBlkPtr
				txa

				inc SLIST.BlockPtr 
				ldy SLIST.BlockPtr 
				sta (ZPSListIBlkPtr),y

*				stz SLIST.BytePtr
				plx
.8				ply
				clc
				rts

.9				plx
				ply
				rts
*--------------------------------------
SLIST.SetBlockByte
				ldy SLIST.BytePtr
				sta (ZPSListDBlkPtr),y
				inc SLIST.BytePtr
				bne SLIST.ToNextBlock.RTS
*--------------------------------------
SLIST.ToNextBlock
				inc SLIST.BlockPtr
				ldy SLIST.BlockPtr
				lda (ZPSListIBlkPtr),y
				jsr K.GetMemPtr
				>STYA ZPSListDBlkPtr
SLIST.ToNextBlock.RTS
				rts
*--------------------------------------
SLIST.hList		.BS 1
SLIST.KeyLen	.BS 1
SLIST.DataLen	.BS 2
SLIST.nDataCnt	.BS 2
SLIST.nBufCnt	.BS 2
SLIST.bStringMode	.BS 1
SLIST.KeyID		.EQ *
SLIST.BytePtr	.BS 1
SLIST.BlockPtr	.BS 1
*--------------------------------------
MAN
SAVE USR/SRC/SYS/KERNEL.S.SLISTX
LOAD USR/SRC/SYS/KERNEL.S
ASM