How can I determine the memory space of a generic pointer?

I have a self-contained function that can't call any other functions. I need to pass this function a pointer and since using generic pointers causes calls to a helper function, I require that the pointer...
How can I determine the memory space of a generic pointer?

I have a self-contained function that can't call any other functions. I need to pass this function a pointer and since using generic pointers causes calls to a helper function, I require that the pointer...
Can pointer types be cast?

Here is my problem, i have several simmilar structue definitions (containers for messages) struct FIRST{ unsigned char Word_Pos[8] unsigned char Data[8] unsigned char Msg_Len }; struct FIRST...
Can pointer types be cast?

Here is my problem, i have several simmilar structue definitions (containers for messages) struct FIRST{ unsigned char Word_Pos[8] unsigned char Data[8] unsigned char Msg_Len }; struct FIRST...
c99 compiler can support class pointers

So I want to do this in main static OBD_device *device; device = getDevice(); device->init(); in h typedef struct { void (*init)(void); char (*probeForGW)(void); char (*getData)(void);...