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A2osX/SYS/KERNEL.S.DIRENT.txt

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NEW
AUTO 3,1
*/--------------------------------------
* # OpenDir
* ## C
* `short int hDIR opendir (const char * dirpath);`
* ## ASM
* `>LDYA dirpath`
* `>SYSCALL opendir`
* ## RETURN VALUE
* CC : success
* A = hDIR
* CS : error
* A = EC
*\--------------------------------------
K.OpenDir jsr PFT.CheckPathYA
bcs DIRENT.RTS
jsr FS.OPEN.DIR
bcs DIRENT.RTS
jmp K.FOpen.REGDIR
*/--------------------------------------
* # ReadDir
* ## C
* `struct dirent *readdir (short int hDIR);`
* ## ASM
* `lda hDIR`
* `>SYSCALL readdir`
* ## RETURN VALUE
* CC : success
* X = hDIRENT
* Y,A = PTR to S.DIRENT
* CS : error
* A = EC
* note : A = 0 means no more entry
*\--------------------------------------
.DUMMY ZPTMP,9
.OR ZPTMP 9 Bytes
K.ReadDir.ECIB .BS 1
K.ReadDir.EL .BS 1
K.ReadDir.EPB .BS 1
K.ReadDir.EC .BS 2
K.ReadDir.BufS .BS 2
K.ReadDir.hBuf .BS 1
.ED
*--------------------------------------
K.ReadDir jsr PFT.CheckNodeA
bcs DIRENT.RTS
ldy #S.FD.REG.REF
lda (pFD),y
beq K.ReadDir.ROOT
bpl .1
jmp K.ReadDir.DEV
.1 jmp K.ReadDir.DIR
DIRENT.EOF lda #MLI.E.EOF
sec
DIRENT.RTS rts
*--------------------------------------
K.ReadDir.ROOT ldy #S.FD.DIR.FC did we already returned something ?
lda (pFD),y
bne DIRENT.EOF
stz K.MLI.PARAMS+1 All Volumes
>LDYAI K.Buf256
>STYA K.MLI.PARAMS+2
>STYA ZPPtr2
>MLICALL MLI.ONLINE
bcs DIRENT.RTS
>LDYAI 16+S.STAT*18+1 14*(Vols+Stat) + 4*(PFT+Stat) + \0
jsr K.ReadDir.GetBuf
bcs DIRENT.RTS
.1 lda (ZPPtr2)
and #$0F
beq .4
tax
inc
sta K.MLI.PATH
lda #'/'
sta K.MLI.PATH+1
ldy #1
.2 lda (ZPPtr2),y
sta K.MLI.PATH+1,y
jsr K.ReadDir.Add2B
iny
dex
bne .2
txa Add ending 0 for C String
jsr K.ReadDir.Add2B
jsr FS.ClrStat
lda /S.STAT.MODE.BDEV
sta K.S.STAT+S.STAT.MODE+1
lda (ZPPtr2)
asl DRIVE in Carry
pha
lda #0
rol
inc
sta K.S.STAT+S.STAT.P.DRIVE
pla
lsr CC
lsr
lsr
lsr
lsr
sta K.S.STAT+S.STAT.P.SLOT
>LDYAI K.MLI.PATH
>STYA K.MLI.PARAMS+1
>MLICALL MLI.GFINFO
sta K.S.STAT+S.STAT.P.DEVSTATUS
bcs .3
>LDYA K.MLI.PARAMS+5 AUXTYPE=TOTAL BLOCKS
>STYA K.S.STAT+S.STAT.P.DEVBLOCKS
>LDYA K.MLI.PARAMS+8
>STYA K.S.STAT+S.STAT.BLOCKS
.3 jsr K.ReadDir.AddStat
.4 lda ZPPtr2
clc
adc #16
sta ZPPtr2
bne .1
jsr FS.ClrStat
lda /S.STAT.MODE.DIR
sta K.S.STAT+S.STAT.MODE+1
ldx #0
.6 lda PFTs.pHI,x
beq .8
sta ZPPtr2+1
lda PFTs.pLO,x
sta ZPPtr2
ldy #$ff
.7 iny
lda (ZPPtr2),y
jsr K.ReadDir.Add2B
eor #0
bne .7
jsr K.ReadDir.AddStat
.8 inx
cpx #K.PFT.MAX
bne .6
* lda #0 done by S.MEM.F.INIT0
* sta (ZPPtr4) Ending 0
ldy #S.FD.DIR.FC
lda #255
sta (pFD),y Flag that we returned something for next time
jmp K.ReadDir.EXIT
*--------------------------------------
K.ReadDir.DEV jmp DIRENT.EOF TODO : /dev
*--------------------------------------
K.ReadDir.DIR sta K.MLI.PARAMS+1 A=#S.DIR.PRODOS.REF
stz K.MLI.PARAMS+2
lda /K.Buf256 read in Buf256+IOBuf
sta K.MLI.PARAMS+3
stz K.MLI.PARAMS+4
lda /512
sta K.MLI.PARAMS+5
K.ReadDir.DIR0 >MLICALL MLI.READ Read A block from directory
bcs .99
ldy #S.FD.DIR.EL Check if first run....
lda (pFD),y
bne .2 no, we have all we need....
ldx #3
.1 lda K.Buf256+$23,x Get K.ReadDir.EL.... From Block
sta K.ReadDir.EL,x
dex
bpl .1
ldx #7
ldy #S.FD.DIR.ACL+7
.20 lda K.Buf256+$14,x
cpy #S.FD.DIR.MODE+1
bne .30
and #$0F
.30 sta (pFD),y
dey
dex
bpl .20
inc K.ReadDir.EC Add one to EC because we include VOL/DIR Header
bne .4
inc K.ReadDir.EC+1 ...and ProDOS does NOT include header entry in EC
bra .4
.99 rts
.2 ldy #S.FD.DIR.EL+3
ldx #3
.3 lda (pFD),y get this session parameters from S.DIR
sta K.ReadDir.EL,x
dey
dex
bpl .3
.4 lda K.ReadDir.EC
eor #$ff
tax
lda K.ReadDir.EC+1
eor #$ff
tay
inx Any entry remaining ?
bne K.ReadDir.DIR1
iny
bne K.ReadDir.DIR1
lda #MLI.E.EOF
sec
rts
*--------------------------------------
* pass #1 compute BufS...
*--------------------------------------
K.ReadDir.DIR1 lda K.ReadDir.EPB
sta K.ReadDir.ECIB
lda #1 For Ending 0
sta K.ReadDir.BufS
stz K.ReadDir.BufS+1
jsr K.ReadDir.P3Init
stz .8+1
.10 lda (ZPPtr3)
beq .7 Free slot....goto next
inc .8+1
and #$F0 get storage_type
cmp #$F0 Volume header ?
beq .1
cmp #$E0 directory header ?
beq .2
lda (ZPPtr3) regular DIR or File, get LEN
and #$F compute filename len
sec add "#<filename>" + S.STAT
adc #S.STAT
.HS 2C bit abs
.1 lda #2+S.STAT add "1." string + S.STAT
.HS 2C bit abs
.2 lda #2+S.STAT+3+S.STAT add "1." + S.STAT + "2.." + S.STAT...
clc
adc K.ReadDir.BufS
sta K.ReadDir.BufS
bcc .3
inc K.ReadDir.BufS+1
.3 inx X,Y = !Total entry Count
bne .7
iny
beq K.ReadDir.DIR2 we reached last entry in whole DIR
.7 jsr K.ReadDir.P3Next
bne .10
.8 lda #$FF
bne K.ReadDir.DIR2
jmp K.ReadDir.DIR0
*--------------------------------------
* pass #2 Fill Buffer...(ZPPtr1 & Ptr2 can now be trashed)
*--------------------------------------
K.ReadDir.DIR2 lda K.ReadDir.EPB
sta K.ReadDir.ECIB
>LDYA K.ReadDir.BufS Get a BufS bytes buffer for storing results
jsr K.ReadDir.GetBuf
bcc .10
rts
.10 jsr K.ReadDir.P3Init
.1 lda (ZPPtr3)
beq .7 Empty slot, skip
and #$F0
cmp #$F0 Vol Header ?
bne .2
jsr K.ReadDir.ADD.
bra .4
.2 cmp #$E0 Dir Header ?
bne .3
jsr K.ReadDir.ADD.
jsr K.ReadDir.SA2B
jsr K.ReadDir.ADD..
bra .4
.3 jsr K.ReadDir.FN2B
.4 jsr K.ReadDir.SA2B
lda K.ReadDir.EC decrease global counter...
sec
sbc #1
sta K.ReadDir.EC
lda K.ReadDir.EC+1
sbc #0
sta K.ReadDir.EC+1
ora K.ReadDir.EC
beq .8 0! no more files in DIR
.7 jsr K.ReadDir.P3Next
bne .1
.8 ldx #3
ldy #S.FD.DIR.EL+3
.81 lda K.ReadDir.EL,x Store back this session parameters to S.DIR
sta (pFD),y
dey
dex
bpl .81
K.ReadDir.EXIT ldx K.ReadDir.hBuf
txa
jmp K.GetMemPtr
*--------------------------------------
K.ReadDir.P3Init
ldy #4 Skip 4 bytes linked list
sty ZPPtr3
lda /K.Buf256
sta ZPPtr3+1
rts
*--------------------------------------
K.ReadDir.P3Next
lda ZPPtr3
clc
adc K.ReadDir.EL
sta ZPPtr3
bcc .8
inc ZPPtr3+1
.8 dec K.ReadDir.ECIB 0! no more file in block
rts
*--------------------------------------
K.ReadDir.GetBuf
jsr K.GetMem0 make sure 0 filled
bcs .9
stx K.ReadDir.hBuf
>STYA ZPPtr4
.9 rts
*--------------------------------------
K.ReadDir.ADD. ldx #1 filename="1."
.HS 2C bit abs
K.ReadDir.ADD..
ldx #2 filename="2.."
lda #'.'
.1 jsr K.ReadDir.Add2B Add X dot(s)
dex
bne .1
txa
jmp K.ReadDir.Add2B Add Ending 0
*--------------------------------------
K.ReadDir.FN2B ldy #$1D version/min_version for lowercase bitmap
lda (ZPPtr3),y check bxxxxxxx.xxxxxxxx...
bpl .7 not set, no lowercase bitmap present
pha
dey
lda (ZPPtr3),y
pha
lda #$1
sta .2+1
ldy #15
.1 pla
.2 bit #$ff
pha
beq .3
lda (ZPPtr3),y
ora #$20 convert a-z to A-Z adding from $4x to $6x
sta (ZPPtr3),y
.3 asl .2+1
bne .4
rol .2+1
pla
.4 dey
bne .1
pla
.7 lda (ZPPtr3)
and #$0F get filename len
tax
ldy #1
.8 lda (ZPPtr3),y
jsr K.ReadDir.Add2B
iny
dex
bne .8
txa
* jsr K.ReadDir.Add2B
* rts
*--------------------------------------
K.ReadDir.Add2B sta (ZPPtr4)
inc ZPPtr4
bne .8
inc ZPPtr4+1
.8 rts
*--------------------------------------
K.ReadDir.SA2B jsr FS.DirEnt2Stat
ldy #S.FD.DIR.UID
ldx #S.STAT.UID
.1 lda (pFD),y
sta K.S.STAT,x
iny
inx
cpx #S.STAT.GID+2
bne .1
ldy #S.FD.DIR.MODE+1
ldx #1
.2 lda (pFD),y
ora K.S.STAT+S.STAT.MODE,x
sta K.S.STAT+S.STAT.MODE,x
dey
dex
bpl .2
K.ReadDir.AddStat
ldy #0
.1 lda K.S.STAT,y
jsr K.ReadDir.Add2B
iny
cpy #S.STAT
bne .1
rts
*/-------------------------------------
* # CloseDir
* ## C
* `void closedir(hDIR);`
* ## ASM
* `lda hDIR`
* `>SYSCALL closedir`
* ## RETURN VALUE
* none, always succeed.
*\-------------------------------------
*K.CloseDir .EQ K.FClose
*--------------------------------------
MAN
SAVE usr/src/sys/kernel.s.dirent
LOAD usr/src/sys/kernel.s
ASM
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