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56 lines
1.1 KiB
ArmAsm
56 lines
1.1 KiB
ArmAsm
;
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; int __fastcall__ vscanf (const char* format, va_list ap);
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;
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; Ullrich von Bassewitz, 2004-11-27
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;
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.export _vscanf
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.import _vfscanf
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.import _stdin
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.import decsp2
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.include "zeropage.inc"
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; ----------------------------------------------------------------------------
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; int __fastcall__ vscanf (const char* format, va_list ap)
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; /* Standard C function */
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; {
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; return vfscanf (stdin, format, ap);
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; }
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;
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.code
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_vscanf:
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pha ; Save low byte of ap
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; Decrement the stack pointer by two for the additional parameter.
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jsr decsp2 ; Won't touch X
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; Move the format down
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ldy #2
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lda (sp),y ; Load byte of format
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ldy #0
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sta (sp),y
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ldy #3
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lda (sp),y
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ldy #1
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sta (sp),y
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; Store stdin into the stack frame
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iny
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lda _stdin
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sta (sp),y
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iny
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lda _stdin+1
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sta (sp),y
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; Restore the low byte of ap and jump to vfscanf, which will cleanup the stack
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pla
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jmp _vfscanf
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