mirror of
https://github.com/cc65/cc65.git
synced 2024-11-07 21:10:15 +00:00
98 lines
2.0 KiB
ArmAsm
98 lines
2.0 KiB
ArmAsm
;
|
|
; Oliver Schmidt, 30.12.2004
|
|
;
|
|
; File name handling for ProDOS 8 file I/O
|
|
;
|
|
|
|
.export pushname, popname
|
|
.import subysp, addysp, decsp1
|
|
|
|
.include "zeropage.inc"
|
|
.include "mli.inc"
|
|
|
|
pushname:
|
|
sta ptr1
|
|
stx ptr1+1
|
|
|
|
; Alloc pathname buffer
|
|
ldy #64+1 ; Max pathname length + zero
|
|
jsr subysp
|
|
|
|
; Check for full pathname
|
|
ldy #$00
|
|
lda (ptr1),y
|
|
cmp #'/'
|
|
beq copy
|
|
|
|
; Check for system prefix
|
|
lda PFIXPTR
|
|
bne copy
|
|
|
|
; Use unit number of most recent accessed device
|
|
lda DEVNUM
|
|
sta mliparam + MLI::ON_LINE::UNIT_NUM
|
|
|
|
; Use allocated pathname buffer
|
|
lda sp
|
|
ldx sp+1
|
|
sta mliparam + MLI::ON_LINE::DATA_BUFFER
|
|
stx mliparam + MLI::ON_LINE::DATA_BUFFER+1
|
|
|
|
; Get volume name
|
|
lda #ON_LINE_CALL
|
|
ldx #ON_LINE_COUNT
|
|
jsr callmli
|
|
bcs addsp65
|
|
|
|
; Get volume name length
|
|
lda (sp),y
|
|
and #15 ; Max volume name length
|
|
|
|
; Bracket volume name with slashes to form prefix
|
|
sta tmp1
|
|
lda #'/'
|
|
sta (sp),y
|
|
ldy tmp1
|
|
iny ; Leading slash
|
|
sta (sp),y
|
|
iny ; Trailing slash
|
|
|
|
; Adjust source pointer for copy
|
|
sty tmp1
|
|
lda ptr1
|
|
sec
|
|
sbc tmp1
|
|
bcs :+
|
|
dec ptr1+1
|
|
: sta ptr1
|
|
|
|
; Copy source to allocated pathname buffer
|
|
copy: lda (ptr1),y
|
|
sta (sp),y
|
|
beq setlen
|
|
iny
|
|
cpy #64+1 ; Max pathname length + zero
|
|
bcc copy
|
|
|
|
; Load oserror code
|
|
lda #$40 ; "Invalid pathname syntax"
|
|
|
|
; Free pathname buffer
|
|
addsp65:ldy #64+1
|
|
bne addsp ; Branch always
|
|
|
|
; Alloc and set length byte
|
|
setlen: tya
|
|
jsr decsp1 ; Preserves A
|
|
ldy #$00
|
|
sta (sp),y
|
|
|
|
; Return success
|
|
tya
|
|
rts
|
|
|
|
popname:
|
|
; Cleanup stack
|
|
ldy #1 + 64+1 ; Length byte + max pathname length + zero
|
|
addsp: jmp addysp ; Preserves A
|