volume.aii

	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