State machines in C

Question

What is the best way to write a state machine in C?
I usually write a big switch-case statement in a for(;;), with callbacks to re-enter the state machine when an external

Answer 1

I used this pattern. Is there a typical state machine implementation pattern? (check best answer).

But i also add some features
1. Information about previous state.
2. Parameter passing
3. Adding external events like global timeout and "resseting SM"

I found state machines little less cryptic and maintainable.
Anyway, I still think state machines are most difficult and annoying programming task.(I got so far)