class IFileSystem;

extern HINSTANCE g_hInstance, g_hThisModule, g_hEngineModule;
extern PVOID g_dwEngineBase;
extern DWORD g_dwEngineSize;
extern PVOID g_dwEngineTextBase;
extern DWORD g_dwEngineTextSize;
extern PVOID g_dwEngineDataBase;
extern DWORD g_dwEngineDataSize;
extern PVOID g_dwEngineRdataBase;
extern DWORD g_dwEngineRdataSize;
extern DWORD g_dwEngineBuildnum;
extern int g_iEngineType;

extern IFileSystem* g_pFileSystem;
extern IFileSystem_HL25* g_pFileSystem_HL25;