minix.fst/volume.aii

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include 'gsos.equ'
include 'minix.equ'
include 'records.equ'
include 'fst.equ'
include 'fst.macros'
include 'M16.Debug'
;
; VolumeGS / Volume call.
;
; check if the disk is ours. create a VCR or mark it active.
;
import id_disk
my_dp record dp.__end
src ds.l 1
dest ds.l 1
length ds.w 1
IF *>=$d4 THEN
AERROR 'dp -- too large.'
ENDIF
endr
import do_file_sys_id
import do_ignore
entry do_block_size
entry do_free_blocks
entry do_total_blocks
entry do_vol_name_0
entry do_vol_name_1
volume procname export
with dp
with dev_parms
with fst_parms
stz tool_error
lda fst_parms.dev1_num
; if no device, find a volume by name...
beq no_dev
jsr id_disk
bcc got_it
cmp #dup_volume
beq dup
sec
rtl
dup
; this is a duplicate volume.
; return the name (and only the name), but also return the error.
lda <call_class
beq dup_0
dup_1
ldy #VolumeRecGS.volName
jsr do_vol_name_1
bcs exit
lda #dup_volume
bra exit
dup_0
ldy #VolumeRec.volName
jsr do_vol_name_0
bcs exit
lda #dup_volume
bra exit
got_it
; init common volume name parameters here...
with my_dp
ldy #vcr.vname.length
lda [my_vcr],y
sta length
lda #vcr.vname.text
clc
adc my_vcr
sta src
lda #0
adc my_vcr+2
sta src+2
endwith
lda <call_class
beq class0
class1
lda [param_blk_ptr] ; pcount
dec a
asl a ; x 2
asl a ; x 4
tax
dispatch volume_dcb_1
lda tool_error
cmp #1
rtl
class0
ldx #volume_dcb_0_size-4
dispatch volume_dcb_0
lda tool_error
exit
cmp #1
rtl
no_dev
lda #unknown_vol
sec
rtl
volume_dcb_0
with VolumeRec
dc.w deviceName, do_ignore
dc.w volName, do_vol_name_0
dc.w totalBlocks, do_total_blocks
dc.w freeBlocks, do_free_blocks
dc.w fileSysID, do_file_sys_id
endwith
volume_dcb_0_size equ *-volume_dcb_0
volume_dcb_1
with VolumeRecGS
dc.w devName, do_ignore
dc.w volName, do_vol_name_1
dc.w totalBlocks, do_total_blocks
dc.w freeBlocks, do_free_blocks
dc.w fileSysID, do_file_sys_id
dc.w blockSize, do_block_size
dc.w characteristics, do_ignore
dc.w deviceID, do_ignore
endwith
endp
do_block_size proc
with dp
with fst_parms
lda #1024
sta [param_blk_ptr],y
rts
endp
do_total_blocks proc
; total blocks = nzones.
; should this ask the driver?
with dp
with fst_parms
phy ; save
ldy #vcr.super.nzones
lda [my_vcr],y
ply
sta [param_blk_ptr],y
iny
iny
lda #0
sta [param_blk_ptr],y
rts
endp
do_free_blocks proc
; load the zmaps and count them up...
; someday.
with fst_parms, dp
phy
ldy #vcr.free_blocks
lda [my_vcr],y
ply
sta [param_blk_ptr],y
iny
iny
lda #0
sta [param_blk_ptr],y
rts
endp
do_vol_name_0 proc
; store the volume name (class 0)
; todo -- error if name > 16 chars? see HFS.
with fst_parms
with dp, my_dp
; length and src are valid.
lda [param_blk_ptr],y
sta dest
iny
iny
lda [param_blk_ptr],y
sta dest+2
; length should be in the range of 1-30.
short m
lda length
sta [dest]
long m
lda dest
clc
adc #1
sta dest
lda dest+2
adc #0
sta dest+2
short m
ldy length
dey
beq done
bmi exit8 ; should never happen.
@loop
lda [src],y
sta [dest],y
dey
bne @loop
done
; uses / as a separator
lda #'/'
sta [dest]
exit8
long m
clc
rts
endp
do_vol_name_1 procname
with fst_parms
with dp, my_dp
lda [param_blk_ptr],y
sta dest
iny
iny
lda [param_blk_ptr],y
sta dest+2
; check the length.
lda [dest]
sec
sbc #4
bmi error
cmp length
; branch after length stored...
lda length
ldy #2
sta [dest],y
; carry still set from cmp
bcc error
lda #4
clc
adc dest
sta dest
lda #0
adc dest+2
sta dest+2
ldy length
beq done
dey
short m
@loop
lda [src],y
sta [dest],y
dey
bpl @loop
long m
done
clc
rts
error
lda #buff_too_small
sta tool_error
sec
rts
endp
end