A2osX/SYS/KERNEL.S.DIRENT.txt

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NEW
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AUTO 3,1
*/--------------------------------------
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* # OpenDir
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* ## C
* `int hDIR opendir (const char * dirpath);`
* ## ASM
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* `>PUSHW dirpath`
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* `>SYSCALL opendir`
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* ## RETURN VALUE
* CC : success
* A = hDIR
* CS : error
* A = EC
*\--------------------------------------
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K.OpenDir jsr PFT.CheckPath0
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bcs K.ReadDir.RTS
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inc pStack
inc pStack
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ldx #1
jsr IO.MkFD
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bcs K.ReadDir.RTS
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lda K.Buf256+1 One char ("/") ?
beq .8 No, Go open dir....
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>MLICALL MLIGETFILEINFO
bcs .98 file/dir does not exists....quit
lda K.MLI.PARAMS+4
cmp #$0F Directory ?
bne .98
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jsr IO.MLI.OPEN
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bcs .98
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.8 lda IO.hFD
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jsr STDIO.NewHFile
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bcc K.ReadDir.RTS
.98 jmp IO.OPEN.ERR
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*/--------------------------------------
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* # ReadDir
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* ## C
* `int readdir (int hDIR, S.DIRENT * dirent);`
* ## ASM
* `>PUSHW dirent`
* `lda hDIR`
* `>SYSCALL readdir`
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* ## RETURN VALUE
* CC : success
* X = hDIRENT
* Y,A = PTR to S.DIRENT
* CS : error
* A = EC
* note : A = 0 means no more entry
*\--------------------------------------
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.DUMMY
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.OR ZPTMP 8 Bytes
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K.ReadDir.hMem .BS 1
K.ReadDir.BufSize .BS 2
K.ReadDir.ECIB .BS 1
K.ReadDir.EL .BS 1
K.ReadDir.EPB .BS 1
K.ReadDir.EC .BS 2
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.ED
*--------------------------------------
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K.ReadDir jsr PFT.CheckNodeA
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bcs K.ReadDir.RTS
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ldy #S.FD.REG.REF
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lda (pFD),y
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beq K.ReadDir.ROOT
jmp K.ReadDir.DIR
K.ReadDir.NoMore
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lda #MLI.E.EOF
sec
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K.ReadDir.RTS rts
*--------------------------------------
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K.ReadDir.ROOT
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ldy #S.FD.DIR.FC did we already returned something ?
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lda (pFD),y
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bne K.ReadDir.NoMore
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stz K.MLI.PARAMS+1 All Volumes
>LDYAI K.Buf256
>STYA K.MLI.PARAMS+2
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>STYA ZPPtr2
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>MLICALL MLIONLINE
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bcs K.ReadDir.RTS
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>LDYAI 16*16+16*S.STAT+1 16 (Vols+Stat) + \0
jsr K.ReadDir.GetBufYA
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bcs K.ReadDir.RTS
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lda #16
sta K.ReadDir.EC
.1 lda (ZPPtr2)
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and #$0F
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beq .6
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tax
inc
sta K.MLI.PATH
lda #'/'
sta K.MLI.PATH+1
ldy #1
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.2 lda (ZPPtr2),y
sta K.MLI.PATH+1,y
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jsr K.ReadDir.AddToBuf
iny
dex
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bne .2
txa Add ending 0 for C String
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jsr K.ReadDir.AddToBuf
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jsr SHARED.ClrStat
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lda (ZPPtr2)
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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
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>MLICALL MLIGETFILEINFO
sta K.S.STAT+S.STAT.P.DEVSTATUS
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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
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.3 jsr K.ReadDir.AddStat
.6 lda ZPPtr2
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clc
adc #16
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sta ZPPtr2
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bcc .7
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inc ZPPtr2+1
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.7 dec K.ReadDir.EC
bne .1
* lda #0 done by S.MEM.F.INIT0
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* sta (ZPPtr4) Ending 0
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ldy #S.FD.DIR.FC
lda #16
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sta (pFD),y Flag that we returned somthing for next time
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jmp K.ReadDir.EXIT
*--------------------------------------
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K.ReadDir.DIR sta K.MLI.PARAMS+1 A=#S.DIR.PRODOS.REF
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>LDYAI 512 Get a 512 bytes buffer for reading dir...
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jsr K.GetMem
bcs .99
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stx K.ReadDir.hMem
>STYA K.MLI.PARAMS+2 For reading
pha
tya
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* clc CC from K.GetMem
adc #4 Skip 4 bytes linked list
sta ZPPtr2 PTR to Buffer for PASS #1
sta ZPPtr3 PTR to Buffer for PASS #2
pla
adc #0
sta ZPPtr2+1 PTR to Buffer for PASS #1
sta ZPPtr3+1 PTR to Buffer for PASS #2
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>LDYAI 512
>STYA K.MLI.PARAMS+4
>MLICALL MLIREAD Read A block from directory
bcs .98
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ldy #S.FD.DIR.EL Check if first run....
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lda (pFD),y
bne .2 no, we have all we need....
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ldy #$1f+3
ldx #3
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.1 lda (ZPPtr2),y Get K.ReadDir.EL.... From Block
sta K.ReadDir.EL,x
dey
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dex
bpl .1
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inc K.ReadDir.EC Add one to EC because we include VOL/DIR Header
bne .4
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inc K.ReadDir.EC+1 ...and ProDOS does NOT include header entry in EC
bra .4
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.98 jsr K.ReadDir.CLN
sec
.99 rts
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.2 ldy #S.FD.DIR.EL+3
ldx #3
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.3 lda (pFD),y get this session parameters from S.DIR
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sta K.ReadDir.EL,x
dey
dex
bpl .3
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.4 lda K.ReadDir.EC
eor #$ff
tax
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lda K.ReadDir.EC+1
eor #$ff
tay
inx Any entry remaining ?
bne .5
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iny
beq .98 no...exit
* pass #1 compute BufSize...
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.5 lda K.ReadDir.EPB
sta K.ReadDir.ECIB
lda #1 For Ending 0
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sta K.ReadDir.BufSize
stz K.ReadDir.BufSize+1
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K.ReadDir.DIR1 lda (ZPPtr2) X = EntryCount In This Block
beq .7 Free slot....goto next
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and #$F0 get storage_type
cmp #$F0 Volume header ?
beq .1
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cmp #$E0 directory header ?
beq .2
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lda (ZPPtr2) regular DIR or File, get LEN
and #$F compute filename len
sec add "#<filename>" + S.STAT
adc #S.STAT
.HS 2C bit abs
.1 lda #2+S.STAT add "1." string + S.STAT
.HS 2C bit abs
.2 lda #2+S.STAT+3+S.STAT add "1." + S.STAT + "2.." + S.STAT...
clc
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adc K.ReadDir.BufSize
sta K.ReadDir.BufSize
bcc .3
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inc K.ReadDir.BufSize+1
.3 inx
bne .7
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iny
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bra K.ReadDir.DIR2 we reached last entry in whole DIR
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.7 lda ZPPtr2
clc
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adc K.ReadDir.EL
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sta ZPPtr2
bcc .8
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inc ZPPtr2+1
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.8 dec K.ReadDir.ECIB
bne K.ReadDir.DIR1
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* pass #2 Fill Buffer...(ZPPtr1 & Ptr2 can now be trashed)
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K.ReadDir.DIR2 jsr K.ReadDir.GetBuf
bcs .9
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lda K.ReadDir.EPB
sta K.ReadDir.ECIB
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.1 lda (ZPPtr3)
beq .7 Empty slot, skip
and #$F0
cmp #$F0 Vol Header ?
bne .2
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jsr K.ReadDir.ADD.
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bra .4
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.2 cmp #$E0 Dir Header ?
bne .3
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jsr K.ReadDir.ADD.
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jsr SHARED.DirEnt2Stat
jsr K.ReadDir.AddStat
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jsr K.ReadDir.ADD..
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bra .4
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.3 jsr K.ReadDir.AddFNToBuf
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.4 jsr SHARED.DirEnt2Stat
jsr K.ReadDir.AddStat
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lda K.ReadDir.EC decrease global counter...
sec
sbc #1
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sta K.ReadDir.EC
lda K.ReadDir.EC+1
sbc #0
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sta K.ReadDir.EC+1
ora K.ReadDir.EC
beq .8 0! no more files in DIR
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.7 dec K.ReadDir.ECIB 0! no more file in block
beq .8
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lda ZPPtr3
clc
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adc K.ReadDir.EL
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sta ZPPtr3
bcc .1
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inc ZPPtr3+1
bra .1
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.9 jsr K.ReadDir.CLN
sec
rts
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.8 ldx #3
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ldy #S.FD.DIR.EL+3
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.81 lda K.ReadDir.EL,x Store back this session prameters to S.DIR
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sta (pFD),y
dey
dex
bpl .81
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jsr K.ReadDir.CLN Discard READBUFFER
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K.ReadDir.EXIT ldx #$ff Self Modified : hDIRENT
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txa
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jmp K.GetMemPtr
*--------------------------------------
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K.ReadDir.CLN pha
lda K.ReadDir.hMem
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jsr K.FreeMem
pla
rts
*--------------------------------------
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K.ReadDir.GetBuf
>LDYA K.ReadDir.BufSize Get a BufSize bytes buffer for storing results
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K.ReadDir.GetBufYA
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jsr K.GetMem0 make sure 0 filled
bcs .9
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stx K.ReadDir.EXIT+1
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>STYA ZPPtr4
.9 rts
*--------------------------------------
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K.ReadDir.ADD. ldx #1 filename="1."
.HS 2C bit abs
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K.ReadDir.ADD..
ldx #2 filename="2.."
lda #'.'
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.1 jsr K.ReadDir.AddToBuf Add X dot(s)
dex
bne .1
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txa
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jmp K.ReadDir.AddToBuf Add Ending 0
*--------------------------------------
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K.ReadDir.AddFNToBuf
ldy #$1C version/min_version for lowercase bitmap
lda (ZPPtr3),y check bxxxxxxx.xxxxxxxx...
bpl .7 not set, no lowercase bitmap present
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pha
iny
lda (ZPPtr3),y
pha
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lda #$1
sta .2+1
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ldy #15
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.1 pla
.2 bit #$ff
pha
beq .3
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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
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rol .2+1
pla
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.4 dey
bne .1
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pla
.7 lda (ZPPtr3)
and #$0F get filename len
tax
ldy #1
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.8 lda (ZPPtr3),y
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jsr K.ReadDir.AddToBuf
iny
dex
bne .8
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txa
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* jsr K.ReadDir.AddToBuf
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* rts
*--------------------------------------
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K.ReadDir.AddToBuf
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sta (ZPPtr4)
inc ZPPtr4
bne .8
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inc ZPPtr4+1
.8 rts
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*--------------------------------------
K.ReadDir.AddStat
ldy #0
.1 lda K.S.STAT,y
jsr K.ReadDir.AddToBuf
iny
cpy #S.STAT
bne .1
rts
*/-------------------------------------
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* # CloseDir
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* ## C
* `void closedir(hDIR);`
* ## ASM
* `lda hDIR`
* `>SYSCALL closedir`
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* ## RETURN VALUE
* none, always succeed.
*\-------------------------------------
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*K.CloseDir .EQ K.FClose
*--------------------------------------
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MAN
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SAVE USR/SRC/SYS/KERNEL.S.DIRENT
LOAD USR/SRC/SYS/KERNEL.S
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ASM