#include <windows.h>
#include <stdio.h>
#include "vcversion.h"

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  dwReason,
                       LPVOID lpReserved
					 )
{
	switch (dwReason)
	{
		case DLL_PROCESS_ATTACH:
		{
			DisableThreadLibraryCalls((HMODULE) hModule);

			DWORD frame_limit = 30;

			FILE* f = fopen("fpslimit.cfg", "r");
			if(f)
			{
				fscanf(f,"%d",&frame_limit);
				fclose(f);
			}

			int nArgs;
			LPWSTR *args = CommandLineToArgvW(GetCommandLineW(), &nArgs);
			int i = 1;
			while( i < nArgs && swscanf(args[i], L"-fpslimit=%d", &frame_limit) == 0) { 
				i++;
			}

			vcversion::DetermineVCVersion();

			DWORD dwProt;
			DWORD p = vcversion::AdjustOffset(0x602D68);
			VirtualProtect((void*)p, 4, PAGE_EXECUTE_READWRITE, &dwProt);
			*(DWORD*)p = frame_limit;
			VirtualProtect((void*)p, 4, dwProt, &dwProt);	

			p = vcversion::AdjustOffset(0x9B48EC);
			*(DWORD*)p = frame_limit;
		}
	
		case DLL_PROCESS_DETACH:
		{
		}
	}

    return TRUE;
}