(*
    BSD 2-Clause License

    Copyright (c) 2018-2019, Anton Krotov
    All rights reserved.
*)

MODULE API;

IMPORT SYSTEM;


CONST

    SectionAlignment = 1000H;


VAR

    eol*:  ARRAY 3 OF CHAR;
    base*: INTEGER;
    heap:  INTEGER;


PROCEDURE [windows-, "kernel32.dll", "ExitProcess"]    ExitProcess (code: INTEGER);
PROCEDURE [windows-, "kernel32.dll", "ExitThread"]     ExitThread (code: INTEGER);
PROCEDURE [windows-, "kernel32.dll", "GetProcessHeap"] GetProcessHeap (): INTEGER;
PROCEDURE [windows-, "kernel32.dll", "HeapAlloc"]      HeapAlloc (hHeap, dwFlags, dwBytes: INTEGER): INTEGER;
PROCEDURE [windows-, "kernel32.dll", "HeapFree"]       HeapFree(hHeap, dwFlags, lpMem: INTEGER);

PROCEDURE [windows-, "user32.dll", "MessageBoxA"]      MessageBoxA (hWnd, lpText, lpCaption, uType: INTEGER): INTEGER;


PROCEDURE DebugMsg* (lpText, lpCaption: INTEGER);
BEGIN
    MessageBoxA(0, lpText, lpCaption, 16)
END DebugMsg;


PROCEDURE _NEW* (size: INTEGER): INTEGER;
    RETURN HeapAlloc(heap, 8, size)
END _NEW;


PROCEDURE _DISPOSE* (p: INTEGER): INTEGER;
BEGIN
    HeapFree(heap, 0, p)
    RETURN 0
END _DISPOSE;


PROCEDURE init* (reserved, code: INTEGER);
BEGIN
    eol[0] := 0DX; eol[1] := 0AX; eol[2] := 0X;
    base := code - SectionAlignment;
    heap := GetProcessHeap()
END init;


PROCEDURE exit* (code: INTEGER);
BEGIN
    ExitProcess(code)
END exit;


PROCEDURE exit_thread* (code: INTEGER);
BEGIN
    ExitThread(code)
END exit_thread;


END API.