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[C] My SetValue function

Cheat Engine Forum Index -> General programming

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talkerzero
Grandmaster Cheater

Reputation: 1

Joined: 24 Jul 2008
Posts: 560
Location: California

Posted: Sun Sep 20, 2009 11:07 am Post subject: [C] My SetValue function

Code:

#include <windows.h>

#define GOOD_RETURN 696969

__checkReturn inline ULONG_PTR SetValue(__in LPVOID lpvDest, __in ULONG_PTR ulValue)
{
if(*(ULONG_PTR*)lpvDest != ulValue)
{
(*(ULONG_PTR*)lpvDest > ulValue) ? --(*(ULONG_PTR*)lpvDest) : ++(*(ULONG_PTR*)lpvDest);
return SetValue(lpvDest, ulValue);
}
return GOOD_RETURN;
}

Example:

Code:

// instead of using:
ulValue = 69;

// use:
if(SetValue(&ulValue, 69) != GOOD_RETURN)
return EXIT_FAILURE;

Full example:

Code:

#include <windows.h>
#include <stdio.h>
#include <tchar.h>

#define GOOD_RETURN 696969

__checkReturn inline ULONG_PTR SetValue(__in LPVOID lpvDest, __in ULONG_PTR ulValue)
{
if(*(ULONG_PTR*)lpvDest != ulValue)
{
   (*(ULONG_PTR*)lpvDest > ulValue) ? --(*(ULONG_PTR*)lpvDest) : ++(*(ULONG_PTR*)lpvDest);
   return SetValue(lpvDest, ulValue);
}
return GOOD_RETURN;
}

int __cdecl _tmain(__in int argc, __in_ecount_z_opt(argc) _TCHAR* __targv[], __in_z_opt _TCHAR* __tenviron[])
{
UNREFERENCED_PARAMETER(argc);
UNREFERENCED_PARAMETER(__targv);
UNREFERENCED_PARAMETER(__tenviron);

ULONG_PTR ulValue = 0;

if(SetValue(&ulValue, 69) != GOOD_RETURN)
   return EXIT_FAILURE;

printf("%d", ulValue);
_gettchar();
return EXIT_SUCCESS;
}

We should totally all use this function and slow down our programs. (lolololol)

&Vage
Grandmaster Cheater Supreme

Reputation: 0

Joined: 25 Jul 2008
Posts: 1053

Posted: Tue Sep 22, 2009 6:24 pm Post subject:

I don't get why people use C on a C++ environment :S

Code:

int Lol = 0;
memset((void*)Lol, 69, 4);

Think that will work.

smartz993
I post too much

Reputation: 2

Joined: 20 Jun 2006
Posts: 2013
Location: USA

Posted: Tue Sep 22, 2009 7:27 pm Post subject:

void:] wrote:

I don't get why people use C on a C++ environment :S

Code:

int Lol = 0;
memset((void*)Lol, 69, 4);

Think that will work.

lol. Do you understand how pointers work at all?

Try referencing the variable Rolling Eyes

hcavolsdsadgadsg
I'm a spammer

Reputation: 26

Joined: 11 Jun 2007
Posts: 5801

Posted: Tue Sep 22, 2009 8:31 pm Post subject:

void:] wrote:

I don't get why people use C on a C++ environment :S

Code:

int Lol = 0;
memset((void*)Lol, 69, 4);

Think that will work.

this is trying to access memory at 0x00000000

i am sure you meant

Code:

memset(&Lol, 69, 4);

&Vage
Grandmaster Cheater Supreme

Reputation: 0

Joined: 25 Jul 2008
Posts: 1053

Posted: Tue Sep 22, 2009 8:36 pm Post subject:

slovach wrote:

void:] wrote:

I don't get why people use C on a C++ environment :S

Code:

int Lol = 0;
memset((void*)Lol, 69, 4);

Think that will work.

this is trying to access memory at 0x00000000

i am sure you meant

Code:

memset(&Lol, 69, 4);

Yeah, my bad.

igoticecream
Grandmaster Cheater Supreme

Reputation: 0

Joined: 23 Apr 2006
Posts: 1807
Location: 0x00400000

Posted: Tue Sep 22, 2009 9:48 pm Post subject:

Just to know, why _cdecl over _stdcall? i know _cdecl stack is to be release by the caller and _stdcall by the callee, but i don't see the diference

hcavolsdsadgadsg
I'm a spammer

Reputation: 26

Joined: 11 Jun 2007
Posts: 5801

Posted: Tue Sep 22, 2009 11:02 pm Post subject:

igoticecream wrote:

Just to know, why _cdecl over _stdcall?

i know _cdecl stack is to be release by the caller and _stdcall by the callee, but i don't see the diference

http://en.wikipedia.org/wiki/X86_calling_conventions

main() must be cdecl
WinMain() must be stdcall

Flyte
Peanuts!!!!

Reputation: 6

Joined: 19 Apr 2006
Posts: 1887
Location: Canada

Posted: Tue Sep 22, 2009 11:20 pm Post subject:

igoticecream wrote:

Just to know, why _cdecl over _stdcall?

i know _cdecl stack is to be release by the caller and _stdcall by the callee, but i don't see the diference

STDCALL is needed for functions in a DLL, as the compiler has no idea how much stack space is needed. CDECL opens up opportunities for optimization.

Jani
Grandmaster Cheater

Reputation: 2

Joined: 29 Dec 2006
Posts: 804

Posted: Wed Sep 23, 2009 1:08 am Post subject:

void:] wrote:

I don't get why people use C on a C++ environment :S

Because C is still faster.

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