cc65/libsrc/conio/cscanf.s

;
; int cscanf(const char* format, ...);
;
; 2000-12-01, Ullrich von Bassewitz
; 2005-01-01, Greg King
;

        .export		_cscanf

        .import		pushax, addysp, _vcscanf

        .macpack	generic
        .include	"zeropage.inc"

; ----------------------------------------------------------------------------
; Code
;
_cscanf:
        sty	ArgSize		; Number of argument bytes passed in .Y
        dey			; subtract size of format pointer
        dey
        tya

; Now, calculate the va_list pointer -- which points to format.

        ldx	sp+1
        add	sp
        bcc	@L1
        inx
@L1:    sta	ptr1
        stx	ptr1+1

; Push a copy of the format pointer onto the stack.

        ldy	#1
        lda	(ptr1),y
        tax
        dey
        lda	(ptr1),y
        jsr	pushax

; Load va_list [last and __fastcall__ argument for vcscanf()].

        lda	ptr1
        ldx	ptr1+1

; Call vcscanf().

        jsr	_vcscanf

; Clean up the stack.  We will return what we got from vcscanf().

        ldy	ArgSize
        jmp	addysp

; ----------------------------------------------------------------------------
; Data
;
        .bss
ArgSize:
        .res	1		; Number of argument bytes