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6613 leency 1
(*
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    Copyright 2016 Anton Krotov
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    This program is free software: you can redistribute it and/or modify
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    it under the terms of the GNU Lesser General Public License as published by
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    the Free Software Foundation, either version 3 of the License, or
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    (at your option) any later version.
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    This program is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public License
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    along with this program.  If not, see .
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*)
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MODULE KOSAPI;
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IMPORT sys := SYSTEM;
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TYPE STRING = ARRAY 1024 OF CHAR;
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VAR DLL_INIT: PROCEDURE [stdcall] (entry: INTEGER);
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PROCEDURE [stdcall] sysfunc1*(arg1: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C20400");           (* ret     04h              *)
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  RETURN 0
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END sysfunc1;
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PROCEDURE [stdcall] sysfunc2*(arg1, arg2: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("53");               (* push    ebx              *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("5B");               (* pop     ebx              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C20800");           (* ret     08h              *)
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  RETURN 0
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END sysfunc2;
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PROCEDURE [stdcall] sysfunc3*(arg1, arg2, arg3: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("53");               (* push    ebx              *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("8B4D10");           (* mov     ecx, [ebp + 10h] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("5B");               (* pop     ebx              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C20C00");           (* ret     0Ch              *)
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  RETURN 0
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END sysfunc3;
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PROCEDURE [stdcall] sysfunc4*(arg1, arg2, arg3, arg4: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("53");               (* push    ebx              *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("8B4D10");           (* mov     ecx, [ebp + 10h] *)
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  sys.CODE("8B5514");           (* mov     edx, [ebp + 14h] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("5B");               (* pop     ebx              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C21000");           (* ret     10h              *)
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  RETURN 0
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END sysfunc4;
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PROCEDURE [stdcall] sysfunc5*(arg1, arg2, arg3, arg4, arg5: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("53");               (* push    ebx              *)
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  sys.CODE("56");               (* push    esi              *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("8B4D10");           (* mov     ecx, [ebp + 10h] *)
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  sys.CODE("8B5514");           (* mov     edx, [ebp + 14h] *)
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  sys.CODE("8B7518");           (* mov     esi, [ebp + 18h] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("5E");               (* pop     esi              *)
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  sys.CODE("5B");               (* pop     ebx              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C21400");           (* ret     14h              *)
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  RETURN 0
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END sysfunc5;
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PROCEDURE [stdcall] sysfunc6*(arg1, arg2, arg3, arg4, arg5, arg6: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("53");               (* push    ebx              *)
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  sys.CODE("56");               (* push    esi              *)
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  sys.CODE("57");               (* push    edi              *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("8B4D10");           (* mov     ecx, [ebp + 10h] *)
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  sys.CODE("8B5514");           (* mov     edx, [ebp + 14h] *)
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  sys.CODE("8B7518");           (* mov     esi, [ebp + 18h] *)
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  sys.CODE("8B7D1C");           (* mov     edi, [ebp + 1Ch] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("5F");               (* pop     edi              *)
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  sys.CODE("5E");               (* pop     esi              *)
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  sys.CODE("5B");               (* pop     ebx              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C21800");           (* ret     18h              *)
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  RETURN 0
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END sysfunc6;
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PROCEDURE [stdcall] sysfunc7*(arg1, arg2, arg3, arg4, arg5, arg6, arg7: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("53");               (* push    ebx              *)
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  sys.CODE("56");               (* push    esi              *)
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  sys.CODE("57");               (* push    edi              *)
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  sys.CODE("55");               (* push    ebp              *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("8B4D10");           (* mov     ecx, [ebp + 10h] *)
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  sys.CODE("8B5514");           (* mov     edx, [ebp + 14h] *)
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  sys.CODE("8B7518");           (* mov     esi, [ebp + 18h] *)
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  sys.CODE("8B7D1C");           (* mov     edi, [ebp + 1Ch] *)
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  sys.CODE("8B6D20");           (* mov     ebp, [ebp + 20h] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("5D");               (* pop     ebp              *)
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  sys.CODE("5F");               (* pop     edi              *)
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  sys.CODE("5E");               (* pop     esi              *)
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  sys.CODE("5B");               (* pop     ebx              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C21C00");           (* ret     1Ch              *)
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  RETURN 0
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END sysfunc7;
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PROCEDURE [stdcall] sysfunc22*(arg1, arg2: INTEGER; VAR res2: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("53");               (* push    ebx              *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("CD40");             (* int     40h              *)
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  sys.CODE("8B4D10");           (* mov     ecx, [ebp + 10h] *)
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  sys.CODE("8919");             (* mov     [ecx], ebx       *)
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  sys.CODE("5B");               (* pop     ebx              *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C20C00");           (* ret     0Ch              *)
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  RETURN 0
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END sysfunc22;
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PROCEDURE [stdcall] malloc*(size: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("60"); (* pusha *)
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  size := sysfunc3(68, 12, size);
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  sys.CODE("61")  (* popa  *)
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  RETURN size
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END malloc;
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PROCEDURE [stdcall] free*(ptr: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("60"); (* pusha *)
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  IF ptr # 0 THEN
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    ptr := sysfunc3(68, 13, ptr)
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  END;
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  sys.CODE("61")  (* popa  *)
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  RETURN 0
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END free;
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PROCEDURE [stdcall] realloc*(ptr, size: INTEGER): INTEGER;
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BEGIN
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  sys.CODE("60"); (* pusha *)
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  ptr := sysfunc4(68, 20, size, ptr);
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  sys.CODE("61")  (* popa  *)
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  RETURN ptr
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END realloc;
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PROCEDURE GetCommandLine*(): INTEGER;
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VAR param: INTEGER;
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BEGIN
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  sys.GET(28, param)
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  RETURN param
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END GetCommandLine;
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PROCEDURE GetName*(): INTEGER;
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VAR name: INTEGER;
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BEGIN
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  sys.GET(32, name)
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  RETURN name
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END GetName;
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PROCEDURE [stdcall] dll_init2(arg1, arg2, arg3, arg4, arg5: INTEGER);
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BEGIN
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  sys.CODE("60");               (* pusha                    *)
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  sys.CODE("8B4508");           (* mov     eax, [ebp + 08h] *)
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  sys.CODE("8B5D0C");           (* mov     ebx, [ebp + 0Ch] *)
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  sys.CODE("8B4D10");           (* mov     ecx, [ebp + 10h] *)
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  sys.CODE("8B5514");           (* mov     edx, [ebp + 14h] *)
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  sys.CODE("8B7518");           (* mov     esi, [ebp + 18h] *)
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  sys.CODE("FFD6");             (* call    esi              *)
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  sys.CODE("61");               (* popa                     *)
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  sys.CODE("C9");               (* leave                    *)
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  sys.CODE("C21400");           (* ret     14h              *)
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END dll_init2;
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PROCEDURE GetProcAdr*(name: ARRAY OF CHAR; lib: INTEGER): INTEGER;
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VAR cur, procname, adr: INTEGER;
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  PROCEDURE streq(str1, str2: INTEGER): BOOLEAN;
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  VAR c1, c2: CHAR;
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  BEGIN
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    REPEAT
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      sys.GET(str1, c1);
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      sys.GET(str2, c2);
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      INC(str1);
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      INC(str2)
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    UNTIL (c1 # c2) OR (c1 = 0X)
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    RETURN c1 = c2
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  END streq;
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BEGIN
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  adr := 0;
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  IF (lib # 0) & (name # "") THEN
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    cur := lib;
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    REPEAT
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      sys.GET(cur, procname);
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      INC(cur, 8)
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    UNTIL (procname = 0) OR streq(procname, sys.ADR(name[0]));
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    IF procname # 0 THEN
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      sys.GET(cur - 4, adr)
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    END
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  END
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  RETURN adr
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END GetProcAdr;
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PROCEDURE init(dll: INTEGER);
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VAR lib_init: INTEGER;
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BEGIN
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  lib_init := GetProcAdr("lib_init", dll);
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  IF lib_init # 0 THEN
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    DLL_INIT(lib_init)
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  END;
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  lib_init := GetProcAdr("START", dll);
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  IF lib_init # 0 THEN
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    DLL_INIT(lib_init)
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  END;
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END init;
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PROCEDURE [stdcall] dll_Load(import_table: INTEGER): INTEGER;
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VAR imp, lib, exp, proc, res: INTEGER;
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    fail, done: BOOLEAN;
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    procname, libname: STRING;
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  PROCEDURE GetStr(adr, i: INTEGER; VAR str: STRING);
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  VAR c: CHAR;
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  BEGIN
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    REPEAT
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      sys.GET(adr, c); INC(adr);
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      str[i] := c; INC(i)
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    UNTIL c = 0X
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  END GetStr;
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BEGIN
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  sys.CODE("60"); (* pusha *)
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  fail := FALSE;
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  done := FALSE;
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  res := 0;
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  libname := "/rd/1/lib/";
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  REPEAT
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    sys.GET(import_table, imp);
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    IF imp # 0 THEN
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      sys.GET(import_table + 4, lib);
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      GetStr(lib, 10, libname);
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      exp := sysfunc3(68, 19, sys.ADR(libname[0]));
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      fail := exp = 0;
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    ELSE
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      done := TRUE
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    END;
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    IF fail THEN
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      done := TRUE
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    END;
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    IF (imp # 0) & ~fail THEN
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      REPEAT
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	sys.GET(imp, proc);
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	IF proc # 0 THEN
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	  GetStr(proc, 0, procname);
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	  proc := GetProcAdr(procname, exp);
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	  IF proc # 0 THEN
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	    sys.PUT(imp, proc);
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	    INC(imp, 4);
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	  END
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	END
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      UNTIL proc = 0;
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      init(exp);
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      INC(import_table, 8)
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    END
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  UNTIL done;
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  IF fail THEN
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    res := 1
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  END;
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  import_table := res;
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  sys.CODE("61") (* popa *)
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  RETURN import_table
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END dll_Load;
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PROCEDURE [stdcall] dll_Init(entry: INTEGER);
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BEGIN
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  sys.CODE("60"); (* pusha *)
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  IF entry # 0 THEN
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    dll_init2(sys.ADR(malloc), sys.ADR(free), sys.ADR(realloc), sys.ADR(dll_Load), entry)
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  END;
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  sys.CODE("61"); (* popa  *)
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END dll_Init;
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PROCEDURE LoadLib*(name: ARRAY OF CHAR): INTEGER;
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VAR Lib: INTEGER;
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BEGIN
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  Lib := sysfunc3(68, 19, sys.ADR(name[0]));
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  IF Lib # 0 THEN
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    init(Lib)
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  END
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  RETURN Lib
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END LoadLib;
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BEGIN
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  DLL_INIT := dll_Init
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END KOSAPI.