type
   VA_FN = function(const par1, par2{, }: Pointer): Integer; cdecl varargs;

procedure CvtInt;
{ IN:
     EAX:   The integer value to be converted to text
     ESI:   Ptr to the right-hand side of the output buffer:   LEA ESI, StrBuf[16]
     ECX:   Base for conversion: 0 for signed decimal, 10 or 16 for unsigned
     EDX:   Precision: zero padded minimum field width
   OUT:
     ESI:   Ptr to start of converted text (not start of buffer)
     ECX:   Length of converted text
}
asm
         OR       CL,CL
         JNZ      @CvtLoop
@C1:     OR       EAX,EAX
         JNS      @C2
         NEG      EAX
         CALL     @C2
         MOV      AL,'-'
         INC      ECX
         DEC      ESI
         MOV      [ESI],AL
         RET
@C2:     MOV      ECX,10

@CvtLoop:
         PUSH     EDX
         PUSH     ESI
@D1:     XOR      EDX,EDX
         DIV      ECX
         DEC      ESI
         ADD      DL,'0'
         CMP      DL,'0'+10
         JB       @D2
         ADD      DL,('A'-'0')-10
@D2:     MOV      [ESI],DL
         OR       EAX,EAX
         JNE      @D1
         POP      ECX
         POP      EDX
         SUB      ECX,ESI
         SUB      EDX,ECX
         JBE      @D5
         ADD      ECX,EDX
         MOV      AL,'0'
         SUB      ESI,EDX
         JMP      @z
@zloop: MOV      [ESI+EDX],AL
@z:      DEC      EDX
         JNZ      @zloop
         MOV      [ESI],AL
@D5:
end;

function sprintf(lpcszFormat:PAnsiChar;lpszBuf:PAnsiChar;BufLen:Integer{Arg1,Arg2}):Integer;cdecl;
  label Scan,ExitProc,MeetInteger,Movbuf,ScanLoop,CopyLoop,label1,label2,label3,Check1;
asm
  {
   编译器自动加的指令：
   push ebp
   mov ebp,esp
  }
   add ebp,20 {ebp指向第一个格式参数}
   push edx
   push esi
   push edi
   sub esp,24   { 16字符的缓冲区+4字节保存当前格式化串的子串指针+4字节=24 }
   lea esi,[esp+24] {esi保存字符缓冲区结尾地址}
   mov edx,[ebp-8] { edx保存目标串当前位置 }
   mov ebx,[ebp-12]  { ebx保存格式化串当前位置 }
Scan:
   mov eax,ebx
   cmp byte ptr [eax],0
   jz ExitProc
   push edx
   mov dx,'%'
   call StrScan (* 查找占位符% *)
   pop edx
   test eax,eax
   jz ExitProc
   mov ecx,eax
   sub ecx,ebx
   call label1
   jmp label2
label1:
   push eax
   CopyLoop:
   mov al,[ebx]
   cmp al,0  {遇到0字符终止}
   jz label3
   mov [edx],al
   inc ebx
   inc edx
   loop CopyLoop
label3:
   pop eax
   ret
label2:
   cmp byte ptr [eax+$01],'d'
   jnz Check1
   add ebx,2
   call MeetInteger
   jmp Scan
Check1:
   cmp byte ptr [eax+$01],'%'
   jnz ExitProc
   add ebx,2
   mov byte ptr [edx],'%'
   inc edx
   jmp Scan
MeetInteger:
   push eax
   push esi
   push edx
   mov eax,[ebp]
   mov ecx,0  (* 有符号数 *)
   mov edx,0
   call CvtInt
   pop edx
   call MovBuf
   add ebp,4  {让ebp指向下一个参数}
   pop esi
   pop eax
   ret
Movbuf:
   mov al,[esi]
   mov [edx],al
   inc esi
   inc edx
   loop MovBuf
   ret
ExitProc:
   mov ecx,$7FFFFFFF
   call label1
   mov [edx],0
   mov Result,0
   add esp,24
   pop edi
   pop esi
   pop edx
  {
   编译器自动加的指令：
   pop ebp
   ret
  }
end;

{DELPHI does the right thing here. It automatically generates
a copy of the argp on the stack}
function TPythonInterface.PyArg_Parse ( args: PPyObject; format: PChar;
argp: array of Pointer): Integer; cdecl;
begin
{$IFDEF DELPHI6_OR_HIGHER}
Result := 0;
{ Do not optimize this to a "pure" assembler routine, because such
a routine does not copy the array arguments in the prologue code }
asm
lea edx, format
push [edx]

sub edx, TYPE PChar
push [edx]

mov eax, Self
mov eax, [eax].DLL_PyArg_Parse
call eax

pop edx
pop edx
mov Result, eax
end;
{$ELSE}
Result := DLL_PyArg_Parse( args, format );
{$ENDIF}
end;

function TPythonInterface.PyArg_ParseTuple ( args: PPyObject; format: PChar;
argp: array of Pointer): Integer; cdecl;
begin
{$IFDEF DELPHI6_OR_HIGHER}
Result := 0;
{ Do not optimize this to a "pure" assembler routine, because such
a routine does not copy the array arguments in the prologue code }
asm
lea edx, format
push [edx]

sub edx, TYPE PChar
push [edx]

mov eax, Self
mov eax, [eax].DLL_PyArg_ParseTuple
call eax

pop edx
pop edx
mov Result, eax
end;
{$ELSE}
Result := DLL_PyArg_ParseTuple( args, format );
{$ENDIF}
end;