Iterating through memory addresses

[Kyon]

I've lately gotten my hands on the (in)famous Cheat Engine_[1] and found that it was really easy to simulate it in C++, there's just one thing that keeps to disturb me; how to "iterate" through memory addresses (using a void pointer, as types may differ per address)?



Cheat Engine_[1]: Iterates through a list of addresses of unknown types, in which the list length is determined at run-time. It adds elements to this list whenever the current pointer (dereferenced) equals the value of the input and is of the specified type.

[Disch]

You can't do anything with a void pointer but cast to another type.

So if you want to treat the memory as a block of ints, you need to cast to int*:

void* v = /*some address*/;

int sum = 0;

int* ptr = reinterpret_cast<int*>(v);

for(int i = 0; i < some_value; ++i)
  sum += ptr[i];

[Kyon]

The whole point is that I get access to addresses which are determined at run-time, and then iterate till an end value is reached (in normal cases 0xFFFFFF). How to do this?

Note, the addresses stated here are from outside the program itself.

[Galik]

If you want to iterate through memory one byte at a time then you need to cast it to a char*. If you want to iterate through however many bytes make up an int each iteration then you need to cast the memory to an int*.

[m4ster r0shi]

http://cplusplus.com/forum/windows/19725/

Just don't laugh at the "problem" I had...