spell_duration_fix.cpp

void __declspec(naked) fix_spell_duration_overflow_0053973E()
{ // 0053973E
    __asm
    {
        cmp        eax, 0xFFFF
        jle        short ret_point
        mov        eax, 0xFFFF
ret_point:
        // restore overridden code begin
        mov     edx, [ebp-0xC]
        mov     [edx+10h], ax
        // restore overridden code 
        // jump back
        mov     edx, 0x00539745
        jmp     edx
    }
}
// FUNCTIONS BELOW ARE DIFFERENT
void __declspec(naked) fix_spell_duration_overflow()
{ // 0053BFA1
    __asm
    {
        cmp        eax, 0xFFFF
        jle        short ret_point
        mov        eax, 0xFFFF
ret_point:
        mov     edx, [ebp-0x44]
        mov     [edx+0x42], ax
        pop     eax
        inc     eax
        push     eax
        ret
    }
}

//using spells parameter Duration from DATA.BIN instead of constant coding
void __declspec(naked) fix_StoneCurseDurationCalculation()
{ // 005396D9, 0053C32E
    __asm
    {
        cmp        dword ptr [esp],0x05396D9+6
        jne        call2
        mov        edx, [ebp-0x0C]
        jmp        calc
call2:    //cmp        dword ptr [esp],0x053C32E+6
        mov        edx, [ebp-0x02FC]
calc:
        mov        edx, [edx+4]
        mov        edx, [edx+0x0C]
        mov        edx, [edx+0x0E*4]
        imul    edx
        ret
    }
}