Cheat Engine

[wizzar]

I'm writing an analyzer for an MMO, and I managed to find the base address for the loot messages that are constructed whenever a monster is killed.
I was able to code a little program that keeps querying the game's memory where the loot message will be saved, and I'm logging it because the game only allows 300 lines.

My problem is I can't figure out exactly what kind of structure this is, and I'm guessing it's a deque.

Here's how it looks like:

ADDRESS 0x0
OFFSET 0x0 - pointer that leads to the first 2 elements
OFFSET 0x4 - pointer that leads to elements 3 and 4
OFFSET 0x8 - pointer that leads to elements 5 and 6
.....

Now, inside OFFSET 0x0, here's what I find:

OFFSET 0x4 - pointer to first element (then 0x1C > 0x10 > actual loot line)
OFFSET 0xC - pointer to second element (then 0x1C > 0x10 > actual loot line)

This pattern is followed for 512 elements. After that, the game begins overwritting the list, i.e. element 513 will be written over element 1.

Here's a more programatic way to see the pattern:

[Banjo Patterson]

Could it just be a size 512 array of custom loot structures? Where the loot structure contains 2 values, each a pointer to a particular loot related object?

If that were the case, you’d think you could just use an array of size 1024 and store a pointer to a loot object in each index, but perhaps the structure holds 2 pointers to neighbouring loot items as they need to refer to each other someway?

Just throwing ideas around.