How can I efficiently escape nested loops in C using conditional goto statements?

Escaping Nested Loops with Conditional Goto

In C , it is possible to employ a conditional goto statement as a direct means of exiting both switch and while loops simultaneously. While this approach may appear less elegant, it remains an effective solution.

Consider the following code snippet:

<code class="c++">while (true) {
    switch (msg->state) {
    case MSGTYPE: // ...
        break;
    // ... more stuff ...
    case DONE:
        goto exit_loop; // Exit the loop when the state is DONE.
    }
}
exit_loop: ; // Label to mark the exit point</code>

The goto statement allows you to jump directly to a labeled point within the code (here, it is "exit_loop"). By utilizing this technique, you can cleanly break out of nested loops, avoiding the need for flags or complex conditional checks.

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