mirror of
https://github.com/cc65/cc65.git
synced 2024-11-16 02:10:52 +00:00
38 lines
972 B
ArmAsm
38 lines
972 B
ArmAsm
;
|
|
; int __fastcall__ vsprintf (char* Buf, const char* Format, va_list ap);
|
|
;
|
|
; Ullrich von Bassewitz, 2009-09-26
|
|
;
|
|
|
|
.export _vsprintf
|
|
.import pushw0sp, staxysp
|
|
.import vsnprintf
|
|
|
|
|
|
; ----------------------------------------------------------------------------
|
|
; vsprintf - formatted output into a buffer
|
|
;
|
|
; int __fastcall__ vsprintf (char* buf, const char* format, va_list ap);
|
|
;
|
|
|
|
|
|
_vsprintf:
|
|
pha ; Save low byte of ap
|
|
txa
|
|
pha ; Save high byte of op
|
|
|
|
; Build a stackframe for vsnprintf. To do that, we move format one word down,
|
|
; and store 0x7FFF (INT_MAX) as size.
|
|
|
|
jsr pushw0sp ; Get format and push it
|
|
lda #$FF
|
|
ldx #$7F ; INT_MAX
|
|
ldy #2
|
|
jsr staxysp
|
|
|
|
; Contine by jumping to vsnprintf, which expects ap on the CPU stack and will
|
|
; cleanup the C stack
|
|
|
|
jmp vsnprintf
|
|
|