How can I make this repeating code look neater

EDIT: Forgot to mention that I'm on a constrained platform so I'm trying to use as little additional variables as possible.

...
switch (var->type) {
    case (something1):
        if (var->x >= 100 && var->x <= 105) {
            do_something(var);
            return;
        }
        break;

    case (something2):
        if (var->x >= 150 && var->x <= 155) {
            do_something(var);
            return;
        }
        break;

    case (something3):
        if (var->y >= 80 && var->y <= 85) {
            do_something(var);
            return;
        }
        break;

    case (something4):
        if (var->y >= 120 && var->y <= 125) {
            do_something(var);
            return;
        }
        break;
}
... 

Basically the code just checks the type of the variable, checks range on an axis specific to that type, and calls a function if the condition is met, does nothing if not. do_something() is the exact same function within all of the if segments.

I'm sure there's an easy way to write this with less repetition, but I can't seem to figure it out.

Thanks in advance.