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65 lines
1.2 KiB
ArmAsm
65 lines
1.2 KiB
ArmAsm
;
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; int cprintf (const char* Format, ...);
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;
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; Ullrich von Bassewitz, 1.12.2000
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;
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.export _cprintf
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.import pushax, addysp, _vcprintf
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.importzp sp, ptr1
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.macpack generic
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; ----------------------------------------------------------------------------
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; Data
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.bss
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ParamSize: .res 1 ; Number of parameter bytes
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; ----------------------------------------------------------------------------
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; Code
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.code
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_cprintf:
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sty ParamSize ; Number of param bytes passed in Y
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; Calculate a pointer that points to Format
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dey
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dey ; Sub size of Format
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tya
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add sp
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sta ptr1
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ldx sp+1
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bcc @L1
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inx
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@L1: stx ptr1+1
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; Push Format
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ldy #1
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lda (ptr1),y
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tax
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dey
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lda (ptr1),y
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jsr pushax
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; Load va_list (last and __fastcall__ parameter to vfprintf)
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lda ptr1
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ldx ptr1+1
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; Call vcprintf
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jsr _vcprintf
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; Cleanup the stack. We will return what we got from vcprintf
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ldy ParamSize
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jmp addysp
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