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;
; jede jede@oric.org 2017-01-22
.export _write
.import popax, popptr1
.importzp ptr1, ptr2, ptr3, tmp1
.include "telestrat.inc"
; int write (int fd, const void* buf, int count);
.proc _write
sta ptr3
stx ptr3+1 ; save count as result
eor #$FF
sta ptr2
txa
eor #$FF
sta ptr2+1 ; remember -count-1
jsr popptr1 ; get buf
jsr popax ; get fd and discard
; if fd=0001 then it stdout
cpx #0
beq next
jmp L1
next:
cmp #1
beq L1
; here it's a file opened
lda ptr1
sta PTR_READ_DEST
lda ptr1+1
sta PTR_READ_DEST+1
lda ptr3
ldy ptr3+1
BRK_TELEMON XFWRITE
; compute nb of bytes written
lda PTR_READ_DEST+1
sec
sbc ptr1+1
tax
lda PTR_READ_DEST
sec
sbc ptr1
rts
L1: inc ptr2
bne L2
inc ptr2+1
beq L9
L2: ldy #0
lda (ptr1),y
tax
cpx #$0A ; check for \n
bne L3
BRK_TELEMON XWR0 ; macro send char to screen (channel 0 in telemon terms)
lda #$0D ; return to the beggining of the line
BRK_TELEMON XWR0 ; macro
ldx #$0D
L3:
BRK_TELEMON XWR0 ; macro
inc ptr1
bne L1
inc ptr1+1
jmp L1
; No error, return count
L9: lda ptr3
ldx ptr3+1
rts
.endproc
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