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cc65/libsrc/atmos/write.s
2020-12-27 17:54:49 -05:00

54 lines
1.0 KiB
ArmAsm

;
; Ullrich von Bassewitz, 2003-04-13
;
; int write (int fd, const void* buf, int count);
;
; This function is a hack!
;
.export _write
.import popax, popptr1
.importzp ptr1, ptr2, ptr3, tmp1
.include "atmos.inc"
.proc _write
sta ptr3
stx ptr3+1 ; save count as result
inx
stx ptr2+1
tax
inx
stx ptr2 ; save count with each byte incremented separately
jsr popptr1 ; get buf
jsr popax ; get fd and discard
L1: dec ptr2
bne L2
dec ptr2+1
beq L9
L2: ldy #0
lda (ptr1),y
tax
cpx #$0A ; Check for \n
bne L3
jsr PRINT
ldx #$0D
L3: jsr PRINT
inc ptr1
bne L1
inc ptr1+1
jmp L1
; No error, return count
L9: lda ptr3
ldx ptr3+1
rts
.endproc