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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 API; |
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IMPORT sys := SYSTEM; |
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CONST |
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MAX_SIZE = 16 * 400H; |
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HEAP_SIZE = 1 * 100000H; |
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VAR |
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heap, endheap: INTEGER; |
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pockets: ARRAY MAX_SIZE DIV 32 + 1 OF INTEGER; |
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PROCEDURE [stdcall] zeromem*(size, adr: INTEGER); |
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BEGIN |
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sys.CODE("578B7D0C8B4D0833C09CFCF3AB9D5F") |
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END zeromem; |
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PROCEDURE strncmp*(a, b, n: INTEGER): INTEGER; |
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VAR A, B: CHAR; Res: INTEGER; |
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BEGIN |
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Res := 0; |
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WHILE n > 0 DO |
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sys.GET(a, A); INC(a); |
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sys.GET(b, B); INC(b); |
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DEC(n); |
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IF A # B THEN |
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Res := ORD(A) - ORD(B); |
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n := 0 |
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ELSIF A = 0X THEN |
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n := 0 |
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END |
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END |
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RETURN Res |
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END strncmp; |
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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 _NEW*(size: INTEGER): INTEGER; |
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VAR res, idx, temp: INTEGER; |
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BEGIN |
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IF size <= MAX_SIZE THEN |
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idx := ASR(size, 5); |
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res := pockets[idx]; |
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IF res # 0 THEN |
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sys.GET(res, pockets[idx]); |
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sys.PUT(res, size); |
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INC(res, 4) |
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ELSE |
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IF heap + size >= endheap THEN |
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IF sysfunc2(18, 16) > ASR(HEAP_SIZE, 10) THEN |
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heap := sysfunc3(68, 12, HEAP_SIZE); |
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endheap := heap + HEAP_SIZE |
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ELSE |
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heap := 0 |
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END |
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END; |
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IF heap # 0 THEN |
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sys.PUT(heap, size); |
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res := heap + 4; |
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heap := heap + size |
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ELSE |
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endheap := 0; |
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res := 0 |
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END |
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END |
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ELSE |
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IF sysfunc2(18, 16) > ASR(size, 10) THEN |
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res := sysfunc3(68, 12, size); |
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sys.PUT(res, size); |
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INC(res, 4) |
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ELSE |
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res := 0 |
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END |
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END; |
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IF res # 0 THEN |
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zeromem(ASR(size, 2) - 1, res) |
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END |
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RETURN res |
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END _NEW; |
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PROCEDURE _DISPOSE*(ptr: INTEGER): INTEGER; |
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VAR size, idx: INTEGER; |
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BEGIN |
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DEC(ptr, 4); |
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sys.GET(ptr, size); |
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IF size <= MAX_SIZE THEN |
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idx := ASR(size, 5); |
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sys.PUT(ptr, pockets[idx]); |
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pockets[idx] := ptr |
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ELSE |
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size := sysfunc3(68, 13, ptr) |
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END |
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RETURN 0 |
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END _DISPOSE; |
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PROCEDURE ExitProcess*(p1: INTEGER); |
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BEGIN |
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p1 := sysfunc1(-1) |
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END ExitProcess; |
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PROCEDURE OutChar(c: CHAR); |
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VAR res: INTEGER; |
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BEGIN |
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res := sysfunc3(63, 1, ORD(c)) |
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END OutChar; |
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PROCEDURE DebugMsg*(lpText, lpCaption: INTEGER); |
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VAR c: CHAR; |
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BEGIN |
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IF lpCaption # 0 THEN |
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OutChar(0DX); |
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OutChar(0AX); |
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REPEAT |
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sys.GET(lpCaption, c); |
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IF c # 0X THEN |
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OutChar(c) |
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END; |
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INC(lpCaption) |
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UNTIL c = 0X; |
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OutChar(":"); |
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OutChar(0DX); |
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OutChar(0AX) |
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END; |
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REPEAT |
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sys.GET(lpText, c); |
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IF c # 0X THEN |
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OutChar(c) |
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END; |
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INC(lpText) |
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UNTIL c = 0X; |
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IF lpCaption # 0 THEN |
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OutChar(0DX); |
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OutChar(0AX) |
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END |
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END DebugMsg; |
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PROCEDURE init* (p1: INTEGER); |
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BEGIN |
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p1 := sysfunc2(68, 11) |
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END init; |
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END API. |